drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  *
  14  * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
  15  *
  16  * Much of the design and some of the code came from serial.c
  17  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  18  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  19  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  20  * Converted to pci probing and cleaned up by Jiri Slaby.
  21  *
  22  * This version supports shared IRQ's (only for PCI boards).
  23  *
  24  * Prevent users from opening non-existing Z ports.
  25  *
  26  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  27  * Fixed the PCI detection function to work properly on Alpha systems.
  28  * Implemented support for TIOCSERGETLSR ioctl.
  29  * Implemented full support for non-standard baud rates.
  30  *
  31  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  32  * Request PLX I/O region, although driver doesn't use it, to avoid
  33  * problems with other drivers accessing it.
  34  * Removed count for on-board buffer characters in cy_chars_in_buffer
  35  * (Cyclades-Z only).
  36  *
  37  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  38  * Driver now reports physical instead of virtual memory addresses.
  39  * Masks were added to some Cyclades-Z read accesses.
  40  * Implemented workaround for PLX9050 bug that would cause a system lockup
  41  * in certain systems, depending on the MMIO addresses allocated to the
  42  * board.
  43  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  44  * performance (Cyclom-Y only).
  45  * Code is now compliant with the new module interface (module_[init|exit]).
  46  * Make use of the PCI helper functions to access PCI resources.
  47  * Did some code "housekeeping".
  48  *
  49  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  50  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  51  *
  52  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  53  * Fixed SMP locking in Cyclom-Y interrupt handler.
  54  *
  55  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  56  * Added a new cyclades_card field called nports to allow the driver to
  57  * know the exact number of ports found by the Z firmware after its load;
  58  * RX buffer contention prevention logic on interrupt op mode revisited
  59  * (Cyclades-Z only);
  60  * Revisited printk's for Z debug;
  61  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  62  *
  63  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  64  * Fixed bug in cyz_poll that would make all ports but port 0
  65  * unable to transmit/receive data (Cyclades-Z only);
  66  * Implemented logic to prevent the RX buffer from being stuck with data
  67  * due to a driver / firmware race condition in interrupt op mode
  68  * (Cyclades-Z only);
  69  * Fixed bug in block_til_ready logic that would lead to a system crash;
  70  * Revisited cy_close spinlock usage;
  71  *
  72  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  73  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  74  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  75  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  76  * Removed CTS handling from the driver -- this is now completely handled
  77  * by the firmware (Cyclades-Z only);
  78  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  79  * Fixed handling of ASYNC_SPD_* TTY flags;
  80  * Module unload now unmaps all memory area allocated by ioremap;
  81  *
  82  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  83  * Removed CY_PROC conditional compilation;
  84  * Implemented SMP-awareness for the driver;
  85  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  86  * functions;
  87  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  88  * (irq=NN) as parameters (only for ISA boards);
  89  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  90  * ports from being configured at speeds above 115.2Kbps;
  91  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  92  * switching from working properly;
  93  * The driver now only prints IRQ info for the Cyclades-Z if it's
  94  * configured to work in interrupt mode;
  95  *
  96  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  97  * Added support for interrupt mode operation for the Z cards;
  98  * Removed the driver inactivity control for the Z;
  99  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 100  * the Z firmware is not loaded yet;
 101  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 102  * same functionality;
 103  * Implemented workaround for IRQ setting loss on the PCI configuration
 104  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 105  *
 106  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 107  * /proc entry location changed to /proc/tty/driver/cyclades;
 108  * Added support to shared IRQ's (only for PCI boards);
 109  * Added support for Cobalt Qube2 systems;
 110  * IRQ [de]allocation scheme revisited;
 111  * BREAK implementation changed in order to make use of the 'break_ctl'
 112  * TTY facility;
 113  * Fixed typo in TTY structure field 'driver_name';
 114  * Included a PCI bridge reset and EEPROM reload in the board
 115  * initialization code (for both Y and Z series).
 116  *
 117  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 118  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 119  * closed properly after a SIGINT;
 120  * Module usage counter scheme revisited;
 121  * Added support to the upcoming Y PCI boards (i.e., support to additional
 122  * PCI Device ID's).
 123  *
 124  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 125  * Removed all unnecessary page-alignement operations in ioremap calls
 126  * (ioremap is currently safe for these operations).
 127  *
 128  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 129  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 130  * order to make PLX9050-based boards work with certain motherboards.
 131  *
 132  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 133  * cy_close function now resets (correctly) the tty->closing flag;
 134  * JIFFIES_DIFF macro fixed.
 135  *
 136  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 137  * Fixed bug in cy_close function, which was not informing HW of
 138  * which port should have the reception disabled before doing so;
 139  * fixed Cyclom-8YoP hardware detection bug.
 140  *
 141  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 142  * Fixed bug in cy_close function, which causes malfunction
 143  * of one of the first 4 ports when a higher port is closed
 144  * (Cyclom-Y only).
 145  *
 146  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 147  * Fixed Cyclom-4Yo hardware detection bug.
 148  *
 149  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 150  * /proc/cyclades implementation with great collaboration of
 151  * Marc Lewis <marc@blarg.net>;
 152  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 153  * during PPP operation.
 154  *
 155  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 156  * General code review in order to comply with 2.1 kernel standards;
 157  * data loss prevention for slow devices revisited (cy_wait_until_sent
 158  * was created);
 159  * removed conditional compilation for new/old PCI structure support
 160  * (now the driver only supports the new PCI structure).
 161  *
 162  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 163  * added conditional compilation for new/old PCI structure support;
 164  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 165  *
 166  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 167  * cleaned up the data loss fix;
 168  * fixed XON/XOFF handling once more (Cyclades-Z);
 169  * general review of the driver routines;
 170  * introduction of a mechanism to prevent data loss with slow
 171  * printers, by forcing a delay before closing the port.
 172  *
 173  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 174  * fixed detection/handling of new CD1400 in Ye boards;
 175  * fixed XON/XOFF handling (Cyclades-Z);
 176  * fixed data loss caused by a premature port close;
 177  * introduction of a flag that holds the CD1400 version ID per port
 178  * (used by the CYGETCD1400VER new ioctl).
 179  *
 180  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 181  * Code review for the module cleanup routine;
 182  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 183  * includes anonymous changes regarding signal_pending.
 184  *
 185  * Revision 2.1  1997/11/01 17:42:41 ivan
 186  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 187  * BREAK fix for the Cyclades-Z boards;
 188  * driver inactivity control by FW implemented;
 189  * introduction of flag that allows driver to take advantage of
 190  * a special CD1400 feature related to HW flow control;
 191  * added support for the CD1400  rev. J (Cyclom-Y boards);
 192  * introduction of ioctls to:
 193  *  - control the rtsdtr_inv flag (Cyclom-Y);
 194  *  - control the rflow flag (Cyclom-Y);
 195  *  - adjust the polling interval (Cyclades-Z);
 196  *
 197  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 198  * Fixes related to kernel version conditional
 199  * compilation.
 200  *
 201  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 202  * Compatibility issues between kernels 2.0.x and
 203  * 2.1.x (mainly related to clear_bit function).
 204  *
 205  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 206  * Changes to define the memory window according to the
 207  * board type.
 208  *
 209  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 210  * Changes to support new cycladesZ boards.
 211  *
 212  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 213  * Merge of Bentson's and Daniel's version 1.36.4.28.
 214  * Corrects bug in cy_detect_pci: check if there are more
 215  * ports than the number of static structs allocated.
 216  * Warning message during initialization if this driver is
 217  * used with the new generation of cycladesZ boards.  Those
 218  * will be supported only in next release of the driver.
 219  * Corrects bug in cy_detect_pci and cy_detect_isa that
 220  * returned wrong number of VALID boards, when a cyclomY
 221  * was found with no serial modules connected.
 222  * Changes to use current (2.1.x) kernel subroutine names
 223  * and created macros for compilation with 2.0.x kernel,
 224  * instead of the other way around.
 225  *
 226  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 227  * Change queue_task_irq_off to queue_task_irq.
 228  * The inline function queue_task_irq_off (tqueue.h)
 229  * was removed from latest releases of 2.1.x kernel.
 230  * Use of macro __init to mark the initialization
 231  * routines, so memory can be reused.
 232  * Also incorporate implementation of critical region
 233  * in function cleanup_module() created by anonymous
 234  * linuxer.
 235  *
 236  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 237  * Change to support new firmware that solves DCD problem:
 238  * application could fail to receive SIGHUP signal when DCD
 239  * varying too fast.
 240  *
 241  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 242  * Changed for support linux versions 2.1.X.
 243  * Backward compatible with linux versions 2.0.X.
 244  * Corrected illegal use of filler field in
 245  * CH_CTRL struct.
 246  * Deleted some debug messages.
 247  *
 248  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 249  * Included check for NULL tty pointer in cyz_poll.
 250  *
 251  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 252  * Bill Foster at Blarg! Online services noticed that
 253  * some of the switch elements of -Z modem control
 254  * lacked a closing "break;"
 255  *
 256  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 257  * Changed low water threshold for buffer xmit_buf
 258  *
 259  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 260  * Marcio provided fix to modem status fetch for -Z
 261  *
 262  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 263  * improve mapping of -Z control page (thanks to Steve
 264  * Price <stevep@fa.tdktca.com> for help on this)
 265  *
 266  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 267  * shift from CPU-bound to memcopy in cyz_polling operation
 268  *
 269  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 270  * Added support to set and report higher speeds.
 271  *
 272  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 273  * Some fixes in the HW flow control for the BETA release.
 274  * Don't try to register the IRQ.
 275  *
 276  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 277  * make sure "cyc" appears in all kernel messages; all soft interrupts
 278  * handled by same routine; recognize out-of-band reception; comment
 279  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 280  * fix race condition in -Z buffer management; only -Y needs to explicitly
 281  * flush chars; tidy up some startup messages;
 282  *
 283  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 284  * shift MOD_INC_USE_COUNT location to match
 285  * serial.c; purge some diagnostic messages;
 286  *
 287  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 288  * enable modem status messages and fetch & process them; note
 289  * time of last activity type for each port; set_line_char now
 290  * supports more than line 0 and treats 0 baud correctly;
 291  * get_modem_info senses rs_status;
 292  *
 293  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 294  * barely works--now's time to turn on
 295  * more features 'til it breaks
 296  *
 297  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 298  * check more -Z board status; shorten boot message
 299  *
 300  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 301  * fix reference to ch_ctrl in startup; verify return
 302  * values from cyz_issue_cmd and cyz_update_channel;
 303  * more stuff to get modem control correct;
 304  *
 305  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 306  * more -Z stuff folded in; re-order changes to put -Z stuff
 307  * after -Y stuff (to make changes clearer)
 308  *
 309  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 310  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 311  * Add code to send break.  Clear firmware ID word at startup (so
 312  * that other code won't talk to inactive board).
 313  *
 314  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 315  * add code for -Z in set_line_char
 316  *
 317  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 318  * fold more -Z stuff (or in some cases, error messages)
 319  * into driver; add text to "don't know what to do" messages.
 320  *
 321  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 322  * moved compile-time flags near top of file; cosmetic changes
 323  * to narrow text (to allow 2-up printing); changed many declarations
 324  * to "static" to limit external symbols; shuffled code order to
 325  * coalesce -Y and -Z specific code, also to put internal functions
 326  * in order of tty_driver structure; added code to recognize -Z
 327  * ports (and for moment, do nothing or report error); add cy_startup
 328  * to parse boot command line for extra base addresses for ISA probes;
 329  *
 330  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 331  * reorder some code, fix types of some vars (int vs. long),
 332  * add cy_setup to support user declared ISA addresses
 333  *
 334  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 335  * dump ioctl based firmware load (it's now a user level
 336  * program); ensure uninitialzed ports cannot be used
 337  *
 338  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 339  * rename vars and restructure some code
 340  *
 341  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 342  * get right status back after boot load
 343  *
 344  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 345  * successfully loads firmware
 346  *
 347  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 348  * add more of the code for the boot/load ioctls
 349  *
 350  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 351  * start to add Z functionality--starting with ioctl
 352  * for loading firmware
 353  *
 354  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 355  * added code to recognize Z/PCI card at initialization; report
 356  * presence, but card is not initialized (because firmware needs
 357  * to be loaded)
 358  *
 359  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 360  * starting minor number at zero; added missing verify_area
 361  * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
 362  *
 363  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 364  * remove unneeded boot message & fix CLOCAL hardware flow
 365  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 366  * remove unused diagnostic statements; minor 0 is first;
 367  *
 368  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 369  * The kernel function vremap (available only in later 1.3.xx kernels)
 370  * allows the access to memory addresses above the RAM. This revision
 371  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 372  * above 1Mb (device id 0x101).
 373  *
 374  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 375  * Some global changes to interrupt handling spilled into
 376  * this driver--mostly unused arguments in system function
 377  * calls.  Also added change by Marcio Saito which should
 378  * reduce lost interrupts at startup by fast processors.
 379  *
 380  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 381  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 382  * in 1.3.41 kernel to remove a possible race condition, extend
 383  * some error messages, and let the driver run as a loadable module
 384  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 385  * possible race condition.
 386  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 387  *
 388  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 389  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 390  * required due to reordering of driver initialization.
 391  * Drivers are now initialized *after* memory management.
 392  *
 393  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 394  * remove printk from ISR; fix typo
 395  *
 396  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 397  * Minor fixes in the PCI board support. PCI function calls in
 398  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 399  * <duncan@okay.com>. "bad serial count" message removed.
 400  *
 401  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 402  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 403  * board initialization. Changes in the boot messages. The driver
 404  * supports up to 4 boards and 64 ports by default.
 405  *
 406  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 407  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 408  *
 409  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 410  * add missing break in modem control block in ioctl switch statement
 411  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 412  *
 413  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 414  * make sure CTS flow control is set as soon as possible (thanks
 415  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 416  *
 417  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 418  * initialize defaults for receive threshold and stale data timeout;
 419  * cosmetic changes;
 420  *
 421  * Revision 1.36  1995/03/10  23:33:53  bentson
 422  * added support of chips 4-7 in 32 port Cyclom-Ye;
 423  * fix cy_interrupt pointer dereference problem
 424  * (Joe Portman <baron@aa.net>);
 425  * give better error response if open is attempted on non-existent port
 426  * (Zachariah Vaum <jchryslr@netcom.com>);
 427  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 428  * conditional compilation for -16Y on systems with fast, noisy bus;
 429  * comment out diagnostic print function;
 430  * cleaned up table of base addresses;
 431  * set receiver time-out period register to correct value,
 432  * set receive threshold to better default values,
 433  * set chip timer to more accurate 200 Hz ticking,
 434  * add code to monitor and modify receive parameters
 435  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 436  * <njs@scifi.emi.net>);
 437  *
 438  * Revision 1.35  1994/12/16  13:54:18  steffen
 439  * additional patch by Marcio Saito for board detection
 440  * Accidently left out in 1.34
 441  *
 442  * Revision 1.34  1994/12/10  12:37:12  steffen
 443  * This is the corrected version as suggested by Marcio Saito
 444  *
 445  * Revision 1.33  1994/12/01  22:41:18  bentson
 446  * add hooks to support more high speeds directly; add tytso
 447  * patch regarding CLOCAL wakeups
 448  *
 449  * Revision 1.32  1994/11/23  19:50:04  bentson
 450  * allow direct kernel control of higher signalling rates;
 451  * look for cards at additional locations
 452  *
 453  * Revision 1.31  1994/11/16  04:33:28  bentson
 454  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 455  * a problem in chars_in_buffer has been resolved by some
 456  * small changes;  this should yield smoother output
 457  *
 458  * Revision 1.30  1994/11/16  04:28:05  bentson
 459  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 460  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 461  * cy_hangup that appears to clear up much (all?) of the
 462  * DTR glitches; also he's added/cleaned-up diagnostic messages
 463  *
 464  * Revision 1.29  1994/11/16  04:16:07  bentson
 465  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 466  * operate higher speeds in same way as other serial ports;
 467  * add more serial ports (for up to two 16-port muxes).
 468  *
 469  * Revision 1.28  1994/11/04  00:13:16  root
 470  * turn off diagnostic messages
 471  *
 472  * Revision 1.27  1994/11/03  23:46:37  root
 473  * bunch of changes to bring driver into greater conformance
 474  * with the serial.c driver (looking for missed fixes)
 475  *
 476  * Revision 1.26  1994/11/03  22:40:36  root
 477  * automatic interrupt probing fixed.
 478  *
 479  * Revision 1.25  1994/11/03  20:17:02  root
 480  * start to implement auto-irq
 481  *
 482  * Revision 1.24  1994/11/03  18:01:55  root
 483  * still working on modem signals--trying not to drop DTR
 484  * during the getty/login processes
 485  *
 486  * Revision 1.23  1994/11/03  17:51:36  root
 487  * extend baud rate support; set receive threshold as function
 488  * of baud rate; fix some problems with RTS/CTS;
 489  *
 490  * Revision 1.22  1994/11/02  18:05:35  root
 491  * changed arguments to udelay to type long to get
 492  * delays to be of correct duration
 493  *
 494  * Revision 1.21  1994/11/02  17:37:30  root
 495  * employ udelay (after calibrating loops_per_second earlier
 496  * in init/main.c) instead of using home-grown delay routines
 497  *
 498  * Revision 1.20  1994/11/02  03:11:38  root
 499  * cy_chars_in_buffer forces a return value of 0 to let
 500  * login work (don't know why it does); some functions
 501  * that were returning EFAULT, now executes the code;
 502  * more work on deciding when to disable xmit interrupts;
 503  *
 504  * Revision 1.19  1994/11/01  20:10:14  root
 505  * define routine to start transmission interrupts (by enabling
 506  * transmit interrupts); directly enable/disable modem interrupts;
 507  *
 508  * Revision 1.18  1994/11/01  18:40:45  bentson
 509  * Don't always enable transmit interrupts in startup; interrupt on
 510  * TxMpty instead of TxRdy to help characters get out before shutdown;
 511  * restructure xmit interrupt to check for chars first and quit if
 512  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 513  * (to my view);
 514  *
 515  * Revision 1.17  1994/10/30  04:39:45  bentson
 516  * rename serial_driver and callout_driver to cy_serial_driver and
 517  * cy_callout_driver to avoid linkage interference; initialize
 518  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 519  * from cyclades_port structure; add paranoia check to cy_close;
 520  *
 521  * Revision 1.16  1994/10/30  01:14:33  bentson
 522  * change major numbers; add some _early_ return statements;
 523  *
 524  * Revision 1.15  1994/10/29  06:43:15  bentson
 525  * final tidying up for clean compile;  enable some error reporting
 526  *
 527  * Revision 1.14  1994/10/28  20:30:22  Bentson
 528  * lots of changes to drag the driver towards the new tty_io
 529  * structures and operation.  not expected to work, but may
 530  * compile cleanly.
 531  *
 532  * Revision 1.13  1994/07/21  23:08:57  Bentson
 533  * add some diagnostic cruft; support 24 lines (for testing
 534  * both -8Y and -16Y cards; be more thorough in servicing all
 535  * chips during interrupt; add "volatile" a few places to
 536  * circumvent compiler optimizations; fix base & offset
 537  * computations in block_til_ready (was causing chip 0 to
 538  * stop operation)
 539  *
 540  * Revision 1.12  1994/07/19  16:42:11  Bentson
 541  * add some hackery for kernel version 1.1.8; expand
 542  * error messages; refine timing for delay loops and
 543  * declare loop params volatile
 544  *
 545  * Revision 1.11  1994/06/11  21:53:10  bentson
 546  * get use of save_car right in transmit interrupt service
 547  *
 548  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 549  * add some diagnostic printing; try to fix save_car stuff
 550  *
 551  * Revision 1.10  1994/06/11  20:36:08  bentson
 552  * clean up compiler warnings
 553  *
 554  * Revision 1.9  1994/06/11  19:42:46  bentson
 555  * added a bunch of code to support modem signalling
 556  *
 557  * Revision 1.8  1994/06/11  17:57:07  bentson
 558  * recognize break & parity error
 559  *
 560  * Revision 1.7  1994/06/05  05:51:34  bentson
 561  * Reorder baud table to be monotonic; add cli to CP; discard
 562  * incoming characters and status if the line isn't open; start to
 563  * fold code into cy_throttle; start to port get_serial_info,
 564  * set_serial_info, get_modem_info, set_modem_info, and send_break
 565  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 566  * get flow control characters from tty struct; invalidate ports w/o
 567  * hardware;
 568  *
 569  * Revision 1.6  1994/05/31  18:42:21  bentson
 570  * add a loop-breaker in the interrupt service routine;
 571  * note when port is initialized so that it can be shut
 572  * down under the right conditions; receive works without
 573  * any obvious errors
 574  *
 575  * Revision 1.5  1994/05/30  00:55:02  bentson
 576  * transmit works without obvious errors
 577  *
 578  * Revision 1.4  1994/05/27  18:46:27  bentson
 579  * incorporated more code from lib_y.c; can now print short
 580  * strings under interrupt control to port zero; seems to
 581  * select ports/channels/lines correctly
 582  *
 583  * Revision 1.3  1994/05/25  22:12:44  bentson
 584  * shifting from multi-port on a card to proper multiplexor
 585  * data structures;  added skeletons of most routines
 586  *
 587  * Revision 1.2  1994/05/19  13:21:43  bentson
 588  * start to crib from other sources
 589  *
 590  */
 591
 592 #define CY_VERSION      "2.5"
 593
 594 /* If you need to install more boards than NR_CARDS, change the constant
 595    in the definition below. No other change is necessary to support up to
 596    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 597
 598 #define NR_CARDS        4
 599
 600 /*
 601    If the total number of ports is larger than NR_PORTS, change this
 602    constant in the definition below. No other change is necessary to
 603    support more boards/ports. */
 604
 605 #define NR_PORTS        256
 606
 607 #define ZE_V1_NPORTS    64
 608 #define ZO_V1   0
 609 #define ZO_V2   1
 610 #define ZE_V1   2
 611
 612 #define SERIAL_PARANOIA_CHECK
 613 #undef  CY_DEBUG_OPEN
 614 #undef  CY_DEBUG_THROTTLE
 615 #undef  CY_DEBUG_OTHER
 616 #undef  CY_DEBUG_IO
 617 #undef  CY_DEBUG_COUNT
 618 #undef  CY_DEBUG_DTR
 619 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 620 #undef  CY_DEBUG_INTERRUPTS
 621 #undef  CY_16Y_HACK
 622 #undef  CY_ENABLE_MONITORING
 623 #undef  CY_PCI_DEBUG
 624
 625 /*
 626  * Include section
 627  */
 628 #include <linux/module.h>
 629 #include <linux/errno.h>
 630 #include <linux/signal.h>
 631 #include <linux/sched.h>
 632 #include <linux/timer.h>
 633 #include <linux/interrupt.h>
 634 #include <linux/tty.h>
 635 #include <linux/tty_flip.h>
 636 #include <linux/serial.h>
 637 #include <linux/major.h>
 638 #include <linux/string.h>
 639 #include <linux/fcntl.h>
 640 #include <linux/ptrace.h>
 641 #include <linux/cyclades.h>
 642 #include <linux/mm.h>
 643 #include <linux/ioport.h>
 644 #include <linux/init.h>
 645 #include <linux/delay.h>
 646 #include <linux/spinlock.h>
 647 #include <linux/bitops.h>
 648 #include <linux/firmware.h>
 649
 650 #include <asm/system.h>
 651 #include <linux/io.h>
 652 #include <asm/irq.h>
 653 #include <linux/uaccess.h>
 654
 655 #include <linux/kernel.h>
 656 #include <linux/pci.h>
 657
 658 #include <linux/stat.h>
 659 #include <linux/proc_fs.h>
 660 #include <linux/seq_file.h>
 661
 662 static void cy_throttle(struct tty_struct *tty);
 663 static void cy_send_xchar(struct tty_struct *tty, char ch);
 664
 665 #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
 666
 667 #define Z_FPGA_CHECK(card) \
 668         ((readl(&((struct RUNTIME_9060 __iomem *) \
 669                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 670
 671 #define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \
 672                         ((card).ctl_addr))->mail_box_0)) || \
 673                         Z_FPGA_CHECK(card)) && \
 674                         (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
 675                         ((card).base_addr+ID_ADDRESS))->signature)))
 676
 677 #ifndef SERIAL_XMIT_SIZE
 678 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 679 #endif
 680 #define WAKEUP_CHARS            256
 681
 682 #define STD_COM_FLAGS (0)
 683
 684 /* firmware stuff */
 685 #define ZL_MAX_BLOCKS   16
 686 #define DRIVER_VERSION  0x02010203
 687 #define RAM_SIZE 0x80000
 688
 689 #define Z_FPGA_LOADED(X)        ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
 690
 691 enum zblock_type {
 692         ZBLOCK_PRG = 0,
 693         ZBLOCK_FPGA = 1
 694 };
 695
 696 struct zfile_header {
 697         char name[64];
 698         char date[32];
 699         char aux[32];
 700         u32 n_config;
 701         u32 config_offset;
 702         u32 n_blocks;
 703         u32 block_offset;
 704         u32 reserved[9];
 705 } __attribute__ ((packed));
 706
 707 struct zfile_config {
 708         char name[64];
 709         u32 mailbox;
 710         u32 function;
 711         u32 n_blocks;
 712         u32 block_list[ZL_MAX_BLOCKS];
 713 } __attribute__ ((packed));
 714
 715 struct zfile_block {
 716         u32 type;
 717         u32 file_offset;
 718         u32 ram_offset;
 719         u32 size;
 720 } __attribute__ ((packed));
 721
 722 static struct tty_driver *cy_serial_driver;
 723
 724 #ifdef CONFIG_ISA
 725 /* This is the address lookup table. The driver will probe for
 726    Cyclom-Y/ISA boards at all addresses in here. If you want the
 727    driver to probe addresses at a different address, add it to
 728    this table.  If the driver is probing some other board and
 729    causing problems, remove the offending address from this table.
 730 */
 731
 732 static unsigned int cy_isa_addresses[] = {
 733         0xD0000,
 734         0xD2000,
 735         0xD4000,
 736         0xD6000,
 737         0xD8000,
 738         0xDA000,
 739         0xDC000,
 740         0xDE000,
 741         0, 0, 0, 0, 0, 0, 0, 0
 742 };
 743
 744 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 745
 746 #ifdef MODULE
 747 static long maddr[NR_CARDS];
 748 static int irq[NR_CARDS];
 749
 750 module_param_array(maddr, long, NULL, 0);
 751 module_param_array(irq, int, NULL, 0);
 752 #endif
 753
 754 #endif                          /* CONFIG_ISA */
 755
 756 /* This is the per-card data structure containing address, irq, number of
 757    channels, etc. This driver supports a maximum of NR_CARDS cards.
 758 */
 759 static struct cyclades_card cy_card[NR_CARDS];
 760
 761 static int cy_next_channel;     /* next minor available */
 762
 763 /*
 764  * This is used to look up the divisor speeds and the timeouts
 765  * We're normally limited to 15 distinct baud rates.  The extra
 766  * are accessed via settings in info->port.flags.
 767  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 768  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 769  *                                               HI            VHI
 770  *     20
 771  */
 772 static int baud_table[] = {
 773         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 774         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 775         230400, 0
 776 };
 777
 778 static char baud_co_25[] = {    /* 25 MHz clock option table */
 779         /* value =>    00    01   02    03    04 */
 780         /* divide by    8    32   128   512  2048 */
 781         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 782         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 783 };
 784
 785 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 786         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 787         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 788 };
 789
 790 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 791         /* value =>    00    01   02    03    04 */
 792         /* divide by    8    32   128   512  2048 */
 793         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 794         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 795         0x00
 796 };
 797
 798 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 799         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 800         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 801         0x21
 802 };
 803
 804 static char baud_cor3[] = {     /* receive threshold */
 805         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 806         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 807         0x07
 808 };
 809
 810 /*
 811  * The Cyclades driver implements HW flow control as any serial driver.
 812  * The cyclades_port structure member rflow and the vector rflow_thr
 813  * allows us to take advantage of a special feature in the CD1400 to avoid
 814  * data loss even when the system interrupt latency is too high. These flags
 815  * are to be used only with very special applications. Setting these flags
 816  * requires the use of a special cable (DTR and RTS reversed). In the new
 817  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 818  * cables.
 819  */
 820
 821 static char rflow_thr[] = {     /* rflow threshold */
 822         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 823         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 824         0x0a
 825 };
 826
 827 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 828  *  address order.  This look-up table overcomes that problem.
 829  */
 830 static int cy_chip_offset[] = { 0x0000,
 831         0x0400,
 832         0x0800,
 833         0x0C00,
 834         0x0200,
 835         0x0600,
 836         0x0A00,
 837         0x0E00
 838 };
 839
 840 /* PCI related definitions */
 841
 842 #ifdef CONFIG_PCI
 843 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 844         /* PCI < 1Mb */
 845         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
 846         /* PCI > 1Mb */
 847         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
 848         /* 4Y PCI < 1Mb */
 849         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
 850         /* 4Y PCI > 1Mb */
 851         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
 852         /* 8Y PCI < 1Mb */
 853         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
 854         /* 8Y PCI > 1Mb */
 855         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
 856         /* Z PCI < 1Mb */
 857         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
 858         /* Z PCI > 1Mb */
 859         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
 860         { }                     /* end of table */
 861 };
 862 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 863 #endif
 864
 865 static void cy_start(struct tty_struct *);
 866 static void set_line_char(struct cyclades_port *);
 867 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 868 #ifdef CONFIG_ISA
 869 static unsigned detect_isa_irq(void __iomem *);
 870 #endif                          /* CONFIG_ISA */
 871
 872 #ifndef CONFIG_CYZ_INTR
 873 static void cyz_poll(unsigned long);
 874
 875 /* The Cyclades-Z polling cycle is defined by this variable */
 876 static long cyz_polling_cycle = CZ_DEF_POLL;
 877
 878 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 879
 880 #else                           /* CONFIG_CYZ_INTR */
 881 static void cyz_rx_restart(unsigned long);
 882 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 883 #endif                          /* CONFIG_CYZ_INTR */
 884
 885 static inline int serial_paranoia_check(struct cyclades_port *info,
 886                 char *name, const char *routine)
 887 {
 888 #ifdef SERIAL_PARANOIA_CHECK
 889         if (!info) {
 890                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 891                                 "in %s\n", name, routine);
 892                 return 1;
 893         }
 894
 895         if (info->magic != CYCLADES_MAGIC) {
 896                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 897                                 "struct (%s) in %s\n", name, routine);
 898                 return 1;
 899         }
 900 #endif
 901         return 0;
 902 }                               /* serial_paranoia_check */
 903
 904 /***********************************************************/
 905 /********* Start of block of Cyclom-Y specific code ********/
 906
 907 /* This routine waits up to 1000 micro-seconds for the previous
 908    command to the Cirrus chip to complete and then issues the
 909    new command.  An error is returned if the previous command
 910    didn't finish within the time limit.
 911
 912    This function is only called from inside spinlock-protected code.
 913  */
 914 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
 915 {
 916         unsigned int i;
 917
 918         /* Check to see that the previous command has completed */
 919         for (i = 0; i < 100; i++) {
 920                 if (readb(base_addr + (CyCCR << index)) == 0)
 921                         break;
 922                 udelay(10L);
 923         }
 924         /* if the CCR never cleared, the previous command
 925            didn't finish within the "reasonable time" */
 926         if (i == 100)
 927                 return -1;
 928
 929         /* Issue the new command */
 930         cy_writeb(base_addr + (CyCCR << index), cmd);
 931
 932         return 0;
 933 }                               /* cyy_issue_cmd */
 934
 935 #ifdef CONFIG_ISA
 936 /* ISA interrupt detection code */
 937 static unsigned detect_isa_irq(void __iomem *address)
 938 {
 939         int irq;
 940         unsigned long irqs, flags;
 941         int save_xir, save_car;
 942         int index = 0;          /* IRQ probing is only for ISA */
 943
 944         /* forget possible initially masked and pending IRQ */
 945         irq = probe_irq_off(probe_irq_on());
 946
 947         /* Clear interrupts on the board first */
 948         cy_writeb(address + (Cy_ClrIntr << index), 0);
 949         /* Cy_ClrIntr is 0x1800 */
 950
 951         irqs = probe_irq_on();
 952         /* Wait ... */
 953         udelay(5000L);
 954
 955         /* Enable the Tx interrupts on the CD1400 */
 956         local_irq_save(flags);
 957         cy_writeb(address + (CyCAR << index), 0);
 958         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
 959
 960         cy_writeb(address + (CyCAR << index), 0);
 961         cy_writeb(address + (CySRER << index),
 962                   readb(address + (CySRER << index)) | CyTxRdy);
 963         local_irq_restore(flags);
 964
 965         /* Wait ... */
 966         udelay(5000L);
 967
 968         /* Check which interrupt is in use */
 969         irq = probe_irq_off(irqs);
 970
 971         /* Clean up */
 972         save_xir = (u_char) readb(address + (CyTIR << index));
 973         save_car = readb(address + (CyCAR << index));
 974         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
 975         cy_writeb(address + (CySRER << index),
 976                   readb(address + (CySRER << index)) & ~CyTxRdy);
 977         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
 978         cy_writeb(address + (CyCAR << index), (save_car));
 979         cy_writeb(address + (Cy_ClrIntr << index), 0);
 980         /* Cy_ClrIntr is 0x1800 */
 981
 982         return (irq > 0) ? irq : 0;
 983 }
 984 #endif                          /* CONFIG_ISA */
 985
 986 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
 987                 void __iomem *base_addr)
 988 {
 989         struct cyclades_port *info;
 990         struct tty_struct *tty;
 991         int len, index = cinfo->bus_index;
 992         u8 save_xir, channel, save_car, data, char_count;
 993
 994 #ifdef CY_DEBUG_INTERRUPTS
 995         printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
 996 #endif
 997         /* determine the channel & change to that context */
 998         save_xir = readb(base_addr + (CyRIR << index));
 999         channel = save_xir & CyIRChannel;
1000         info = &cinfo->ports[channel + chip * 4];
1001         save_car = readb(base_addr + (CyCAR << index));
1002         cy_writeb(base_addr + (CyCAR << index), save_xir);
1003
1004         /* if there is nowhere to put the data, discard it */
1005         if (info->port.tty == NULL) {
1006                 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1007                                 CyIVRRxEx) {    /* exception */
1008                         data = readb(base_addr + (CyRDSR << index));
1009                 } else {        /* normal character reception */
1010                         char_count = readb(base_addr + (CyRDCR << index));
1011                         while (char_count--)
1012                                 data = readb(base_addr + (CyRDSR << index));
1013                 }
1014                 goto end;
1015         }
1016         /* there is an open port for this data */
1017         tty = info->port.tty;
1018         if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1019                         CyIVRRxEx) {    /* exception */
1020                 data = readb(base_addr + (CyRDSR << index));
1021
1022                 /* For statistics only */
1023                 if (data & CyBREAK)
1024                         info->icount.brk++;
1025                 else if (data & CyFRAME)
1026                         info->icount.frame++;
1027                 else if (data & CyPARITY)
1028                         info->icount.parity++;
1029                 else if (data & CyOVERRUN)
1030                         info->icount.overrun++;
1031
1032                 if (data & info->ignore_status_mask) {
1033                         info->icount.rx++;
1034                         return;
1035                 }
1036                 if (tty_buffer_request_room(tty, 1)) {
1037                         if (data & info->read_status_mask) {
1038                                 if (data & CyBREAK) {
1039                                         tty_insert_flip_char(tty,
1040                                                 readb(base_addr + (CyRDSR <<
1041                                                         index)), TTY_BREAK);
1042                                         info->icount.rx++;
1043                                         if (info->port.flags & ASYNC_SAK)
1044                                                 do_SAK(tty);
1045                                 } else if (data & CyFRAME) {
1046                                         tty_insert_flip_char(tty,
1047                                                 readb(base_addr + (CyRDSR <<
1048                                                         index)), TTY_FRAME);
1049                                         info->icount.rx++;
1050                                         info->idle_stats.frame_errs++;
1051                                 } else if (data & CyPARITY) {
1052                                         /* Pieces of seven... */
1053                                         tty_insert_flip_char(tty,
1054                                                 readb(base_addr + (CyRDSR <<
1055                                                         index)), TTY_PARITY);
1056                                         info->icount.rx++;
1057                                         info->idle_stats.parity_errs++;
1058                                 } else if (data & CyOVERRUN) {
1059                                         tty_insert_flip_char(tty, 0,
1060                                                         TTY_OVERRUN);
1061                                         info->icount.rx++;
1062                                         /* If the flip buffer itself is
1063                                            overflowing, we still lose
1064                                            the next incoming character.
1065                                          */
1066                                         tty_insert_flip_char(tty,
1067                                                 readb(base_addr + (CyRDSR <<
1068                                                         index)), TTY_FRAME);
1069                                         info->icount.rx++;
1070                                         info->idle_stats.overruns++;
1071                                 /* These two conditions may imply */
1072                                 /* a normal read should be done. */
1073                                 /* } else if(data & CyTIMEOUT) { */
1074                                 /* } else if(data & CySPECHAR) { */
1075                                 } else {
1076                                         tty_insert_flip_char(tty, 0,
1077                                                         TTY_NORMAL);
1078                                         info->icount.rx++;
1079                                 }
1080                         } else {
1081                                 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1082                                 info->icount.rx++;
1083                         }
1084                 } else {
1085                         /* there was a software buffer overrun and nothing
1086                          * could be done about it!!! */
1087                         info->icount.buf_overrun++;
1088                         info->idle_stats.overruns++;
1089                 }
1090         } else {        /* normal character reception */
1091                 /* load # chars available from the chip */
1092                 char_count = readb(base_addr + (CyRDCR << index));
1093
1094 #ifdef CY_ENABLE_MONITORING
1095                 ++info->mon.int_count;
1096                 info->mon.char_count += char_count;
1097                 if (char_count > info->mon.char_max)
1098                         info->mon.char_max = char_count;
1099                 info->mon.char_last = char_count;
1100 #endif
1101                 len = tty_buffer_request_room(tty, char_count);
1102                 while (len--) {
1103                         data = readb(base_addr + (CyRDSR << index));
1104                         tty_insert_flip_char(tty, data, TTY_NORMAL);
1105                         info->idle_stats.recv_bytes++;
1106                         info->icount.rx++;
1107 #ifdef CY_16Y_HACK
1108                         udelay(10L);
1109 #endif
1110                 }
1111                 info->idle_stats.recv_idle = jiffies;
1112         }
1113         tty_schedule_flip(tty);
1114 end:
1115         /* end of service */
1116         cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1117         cy_writeb(base_addr + (CyCAR << index), save_car);
1118 }
1119
1120 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1121                 void __iomem *base_addr)
1122 {
1123         struct cyclades_port *info;
1124         int char_count, index = cinfo->bus_index;
1125         u8 save_xir, channel, save_car, outch;
1126
1127         /* Since we only get here when the transmit buffer
1128            is empty, we know we can always stuff a dozen
1129            characters. */
1130 #ifdef CY_DEBUG_INTERRUPTS
1131         printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1132 #endif
1133
1134         /* determine the channel & change to that context */
1135         save_xir = readb(base_addr + (CyTIR << index));
1136         channel = save_xir & CyIRChannel;
1137         save_car = readb(base_addr + (CyCAR << index));
1138         cy_writeb(base_addr + (CyCAR << index), save_xir);
1139
1140         /* validate the port# (as configured and open) */
1141         if (channel + chip * 4 >= cinfo->nports) {
1142                 cy_writeb(base_addr + (CySRER << index),
1143                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1144                 goto end;
1145         }
1146         info = &cinfo->ports[channel + chip * 4];
1147         if (info->port.tty == NULL) {
1148                 cy_writeb(base_addr + (CySRER << index),
1149                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1150                 goto end;
1151         }
1152
1153         /* load the on-chip space for outbound data */
1154         char_count = info->xmit_fifo_size;
1155
1156         if (info->x_char) {     /* send special char */
1157                 outch = info->x_char;
1158                 cy_writeb(base_addr + (CyTDR << index), outch);
1159                 char_count--;
1160                 info->icount.tx++;
1161                 info->x_char = 0;
1162         }
1163
1164         if (info->breakon || info->breakoff) {
1165                 if (info->breakon) {
1166                         cy_writeb(base_addr + (CyTDR << index), 0);
1167                         cy_writeb(base_addr + (CyTDR << index), 0x81);
1168                         info->breakon = 0;
1169                         char_count -= 2;
1170                 }
1171                 if (info->breakoff) {
1172                         cy_writeb(base_addr + (CyTDR << index), 0);
1173                         cy_writeb(base_addr + (CyTDR << index), 0x83);
1174                         info->breakoff = 0;
1175                         char_count -= 2;
1176                 }
1177         }
1178
1179         while (char_count-- > 0) {
1180                 if (!info->xmit_cnt) {
1181                         if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1182                                 cy_writeb(base_addr + (CySRER << index),
1183                                         readb(base_addr + (CySRER << index)) &
1184                                                 ~CyTxMpty);
1185                         } else {
1186                                 cy_writeb(base_addr + (CySRER << index),
1187                                         (readb(base_addr + (CySRER << index)) &
1188                                                 ~CyTxRdy) | CyTxMpty);
1189                         }
1190                         goto done;
1191                 }
1192                 if (info->port.xmit_buf == NULL) {
1193                         cy_writeb(base_addr + (CySRER << index),
1194                                 readb(base_addr + (CySRER << index)) &
1195                                         ~CyTxRdy);
1196                         goto done;
1197                 }
1198                 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1199                         cy_writeb(base_addr + (CySRER << index),
1200                                 readb(base_addr + (CySRER << index)) &
1201                                         ~CyTxRdy);
1202                         goto done;
1203                 }
1204                 /* Because the Embedded Transmit Commands have been enabled,
1205                  * we must check to see if the escape character, NULL, is being
1206                  * sent. If it is, we must ensure that there is room for it to
1207                  * be doubled in the output stream.  Therefore we no longer
1208                  * advance the pointer when the character is fetched, but
1209                  * rather wait until after the check for a NULL output
1210                  * character. This is necessary because there may not be room
1211                  * for the two chars needed to send a NULL.)
1212                  */
1213                 outch = info->port.xmit_buf[info->xmit_tail];
1214                 if (outch) {
1215                         info->xmit_cnt--;
1216                         info->xmit_tail = (info->xmit_tail + 1) &
1217                                         (SERIAL_XMIT_SIZE - 1);
1218                         cy_writeb(base_addr + (CyTDR << index), outch);
1219                         info->icount.tx++;
1220                 } else {
1221                         if (char_count > 1) {
1222                                 info->xmit_cnt--;
1223                                 info->xmit_tail = (info->xmit_tail + 1) &
1224                                         (SERIAL_XMIT_SIZE - 1);
1225                                 cy_writeb(base_addr + (CyTDR << index), outch);
1226                                 cy_writeb(base_addr + (CyTDR << index), 0);
1227                                 info->icount.tx++;
1228                                 char_count--;
1229                         }
1230                 }
1231         }
1232
1233 done:
1234         tty_wakeup(info->port.tty);
1235 end:
1236         /* end of service */
1237         cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1238         cy_writeb(base_addr + (CyCAR << index), save_car);
1239 }
1240
1241 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1242                 void __iomem *base_addr)
1243 {
1244         struct cyclades_port *info;
1245         int index = cinfo->bus_index;
1246         u8 save_xir, channel, save_car, mdm_change, mdm_status;
1247
1248         /* determine the channel & change to that context */
1249         save_xir = readb(base_addr + (CyMIR << index));
1250         channel = save_xir & CyIRChannel;
1251         info = &cinfo->ports[channel + chip * 4];
1252         save_car = readb(base_addr + (CyCAR << index));
1253         cy_writeb(base_addr + (CyCAR << index), save_xir);
1254
1255         mdm_change = readb(base_addr + (CyMISR << index));
1256         mdm_status = readb(base_addr + (CyMSVR1 << index));
1257
1258         if (!info->port.tty)
1259                 goto end;
1260
1261         if (mdm_change & CyANY_DELTA) {
1262                 /* For statistics only */
1263                 if (mdm_change & CyDCD)
1264                         info->icount.dcd++;
1265                 if (mdm_change & CyCTS)
1266                         info->icount.cts++;
1267                 if (mdm_change & CyDSR)
1268                         info->icount.dsr++;
1269                 if (mdm_change & CyRI)
1270                         info->icount.rng++;
1271
1272                 wake_up_interruptible(&info->delta_msr_wait);
1273         }
1274
1275         if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1276                 if (!(mdm_status & CyDCD)) {
1277                         tty_hangup(info->port.tty);
1278                         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1279                 }
1280                 wake_up_interruptible(&info->port.open_wait);
1281         }
1282         if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1283                 if (info->port.tty->hw_stopped) {
1284                         if (mdm_status & CyCTS) {
1285                                 /* cy_start isn't used
1286                                    because... !!! */
1287                                 info->port.tty->hw_stopped = 0;
1288                                 cy_writeb(base_addr + (CySRER << index),
1289                                         readb(base_addr + (CySRER << index)) |
1290                                                 CyTxRdy);
1291                                 tty_wakeup(info->port.tty);
1292                         }
1293                 } else {
1294                         if (!(mdm_status & CyCTS)) {
1295                                 /* cy_stop isn't used
1296                                    because ... !!! */
1297                                 info->port.tty->hw_stopped = 1;
1298                                 cy_writeb(base_addr + (CySRER << index),
1299                                         readb(base_addr + (CySRER << index)) &
1300                                                 ~CyTxRdy);
1301                         }
1302                 }
1303         }
1304 /*      if (mdm_change & CyDSR) {
1305         }
1306         if (mdm_change & CyRI) {
1307         }*/
1308 end:
1309         /* end of service */
1310         cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1311         cy_writeb(base_addr + (CyCAR << index), save_car);
1312 }
1313
1314 /* The real interrupt service routine is called
1315    whenever the card wants its hand held--chars
1316    received, out buffer empty, modem change, etc.
1317  */
1318 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1319 {
1320         int status;
1321         struct cyclades_card *cinfo = dev_id;
1322         void __iomem *base_addr, *card_base_addr;
1323         unsigned int chip, too_many, had_work;
1324         int index;
1325
1326         if (unlikely(cinfo == NULL)) {
1327 #ifdef CY_DEBUG_INTERRUPTS
1328                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1329                                 irq);
1330 #endif
1331                 return IRQ_NONE;        /* spurious interrupt */
1332         }
1333
1334         card_base_addr = cinfo->base_addr;
1335         index = cinfo->bus_index;
1336
1337         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1338         if (unlikely(card_base_addr == NULL))
1339                 return IRQ_HANDLED;
1340
1341         /* This loop checks all chips in the card.  Make a note whenever
1342            _any_ chip had some work to do, as this is considered an
1343            indication that there will be more to do.  Only when no chip
1344            has any work does this outermost loop exit.
1345          */
1346         do {
1347                 had_work = 0;
1348                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1349                         base_addr = cinfo->base_addr +
1350                                         (cy_chip_offset[chip] << index);
1351                         too_many = 0;
1352                         while ((status = readb(base_addr +
1353                                                 (CySVRR << index))) != 0x00) {
1354                                 had_work++;
1355                         /* The purpose of the following test is to ensure that
1356                            no chip can monopolize the driver.  This forces the
1357                            chips to be checked in a round-robin fashion (after
1358                            draining each of a bunch (1000) of characters).
1359                          */
1360                                 if (1000 < too_many++)
1361                                         break;
1362                                 spin_lock(&cinfo->card_lock);
1363                                 if (status & CySRReceive) /* rx intr */
1364                                         cyy_chip_rx(cinfo, chip, base_addr);
1365                                 if (status & CySRTransmit) /* tx intr */
1366                                         cyy_chip_tx(cinfo, chip, base_addr);
1367                                 if (status & CySRModem) /* modem intr */
1368                                         cyy_chip_modem(cinfo, chip, base_addr);
1369                                 spin_unlock(&cinfo->card_lock);
1370                         }
1371                 }
1372         } while (had_work);
1373
1374         /* clear interrupts */
1375         spin_lock(&cinfo->card_lock);
1376         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1377         /* Cy_ClrIntr is 0x1800 */
1378         spin_unlock(&cinfo->card_lock);
1379         return IRQ_HANDLED;
1380 }                               /* cyy_interrupt */
1381
1382 /***********************************************************/
1383 /********* End of block of Cyclom-Y specific code **********/
1384 /******** Start of block of Cyclades-Z specific code *******/
1385 /***********************************************************/
1386
1387 static int
1388 cyz_fetch_msg(struct cyclades_card *cinfo,
1389                 __u32 *channel, __u8 *cmd, __u32 *param)
1390 {
1391         struct FIRM_ID __iomem *firm_id;
1392         struct ZFW_CTRL __iomem *zfw_ctrl;
1393         struct BOARD_CTRL __iomem *board_ctrl;
1394         unsigned long loc_doorbell;
1395
1396         firm_id = cinfo->base_addr + ID_ADDRESS;
1397         if (!ISZLOADED(*cinfo))
1398                 return -1;
1399         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1400         board_ctrl = &zfw_ctrl->board_ctrl;
1401
1402         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1403                                   (cinfo->ctl_addr))->loc_doorbell);
1404         if (loc_doorbell) {
1405                 *cmd = (char)(0xff & loc_doorbell);
1406                 *channel = readl(&board_ctrl->fwcmd_channel);
1407                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1408                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1409                           loc_doorbell, 0xffffffff);
1410                 return 1;
1411         }
1412         return 0;
1413 }                               /* cyz_fetch_msg */
1414
1415 static int
1416 cyz_issue_cmd(struct cyclades_card *cinfo,
1417                 __u32 channel, __u8 cmd, __u32 param)
1418 {
1419         struct FIRM_ID __iomem *firm_id;
1420         struct ZFW_CTRL __iomem *zfw_ctrl;
1421         struct BOARD_CTRL __iomem *board_ctrl;
1422         __u32 __iomem *pci_doorbell;
1423         unsigned int index;
1424
1425         firm_id = cinfo->base_addr + ID_ADDRESS;
1426         if (!ISZLOADED(*cinfo))
1427                 return -1;
1428
1429         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1430         board_ctrl = &zfw_ctrl->board_ctrl;
1431
1432         index = 0;
1433         pci_doorbell =
1434             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1435         while ((readl(pci_doorbell) & 0xff) != 0) {
1436                 if (index++ == 1000)
1437                         return (int)(readl(pci_doorbell) & 0xff);
1438                 udelay(50L);
1439         }
1440         cy_writel(&board_ctrl->hcmd_channel, channel);
1441         cy_writel(&board_ctrl->hcmd_param, param);
1442         cy_writel(pci_doorbell, (long)cmd);
1443
1444         return 0;
1445 }                               /* cyz_issue_cmd */
1446
1447 static void cyz_handle_rx(struct cyclades_port *info,
1448                 struct BUF_CTRL __iomem *buf_ctrl)
1449 {
1450         struct cyclades_card *cinfo = info->card;
1451         struct tty_struct *tty = info->port.tty;
1452         unsigned int char_count;
1453         int len;
1454 #ifdef BLOCKMOVE
1455         unsigned char *buf;
1456 #else
1457         char data;
1458 #endif
1459         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1460
1461         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1462         rx_put = readl(&buf_ctrl->rx_put);
1463         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1464         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1465         if (rx_put >= rx_get)
1466                 char_count = rx_put - rx_get;
1467         else
1468                 char_count = rx_put - rx_get + rx_bufsize;
1469
1470         if (char_count) {
1471 #ifdef CY_ENABLE_MONITORING
1472                 info->mon.int_count++;
1473                 info->mon.char_count += char_count;
1474                 if (char_count > info->mon.char_max)
1475                         info->mon.char_max = char_count;
1476                 info->mon.char_last = char_count;
1477 #endif
1478                 if (tty == NULL) {
1479                         /* flush received characters */
1480                         new_rx_get = (new_rx_get + char_count) &
1481                                         (rx_bufsize - 1);
1482                         info->rflush_count++;
1483                 } else {
1484 #ifdef BLOCKMOVE
1485                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1486                    for performance, but because of buffer boundaries, there
1487                    may be several steps to the operation */
1488                         while (1) {
1489                                 len = tty_prepare_flip_string(tty, &buf,
1490                                                 char_count);
1491                                 if (!len)
1492                                         break;
1493
1494                                 len = min_t(unsigned int, min(len, char_count),
1495                                                 rx_bufsize - new_rx_get);
1496
1497                                 memcpy_fromio(buf, cinfo->base_addr +
1498                                                 rx_bufaddr + new_rx_get, len);
1499
1500                                 new_rx_get = (new_rx_get + len) &
1501                                                 (rx_bufsize - 1);
1502                                 char_count -= len;
1503                                 info->icount.rx += len;
1504                                 info->idle_stats.recv_bytes += len;
1505                         }
1506 #else
1507                         len = tty_buffer_request_room(tty, char_count);
1508                         while (len--) {
1509                                 data = readb(cinfo->base_addr + rx_bufaddr +
1510                                                 new_rx_get);
1511                                 new_rx_get = (new_rx_get + 1) &
1512                                                         (rx_bufsize - 1);
1513                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1514                                 info->idle_stats.recv_bytes++;
1515                                 info->icount.rx++;
1516                         }
1517 #endif
1518 #ifdef CONFIG_CYZ_INTR
1519                 /* Recalculate the number of chars in the RX buffer and issue
1520                    a cmd in case it's higher than the RX high water mark */
1521                         rx_put = readl(&buf_ctrl->rx_put);
1522                         if (rx_put >= rx_get)
1523                                 char_count = rx_put - rx_get;
1524                         else
1525                                 char_count = rx_put - rx_get + rx_bufsize;
1526                         if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1527                                         !timer_pending(&cyz_rx_full_timer[
1528                                                         info->line]))
1529                                 mod_timer(&cyz_rx_full_timer[info->line],
1530                                                 jiffies + 1);
1531 #endif
1532                         info->idle_stats.recv_idle = jiffies;
1533                         tty_schedule_flip(tty);
1534                 }
1535                 /* Update rx_get */
1536                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1537         }
1538 }
1539
1540 static void cyz_handle_tx(struct cyclades_port *info,
1541                 struct BUF_CTRL __iomem *buf_ctrl)
1542 {
1543         struct cyclades_card *cinfo = info->card;
1544         struct tty_struct *tty = info->port.tty;
1545         u8 data;
1546         unsigned int char_count;
1547 #ifdef BLOCKMOVE
1548         int small_count;
1549 #endif
1550         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1551
1552         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1553                 return;
1554
1555         tx_get = readl(&buf_ctrl->tx_get);
1556         tx_put = readl(&buf_ctrl->tx_put);
1557         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1558         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1559         if (tx_put >= tx_get)
1560                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1561         else
1562                 char_count = tx_get - tx_put - 1;
1563
1564         if (char_count) {
1565
1566                 if (tty == NULL)
1567                         goto ztxdone;
1568
1569                 if (info->x_char) {     /* send special char */
1570                         data = info->x_char;
1571
1572                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1573                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1574                         info->x_char = 0;
1575                         char_count--;
1576                         info->icount.tx++;
1577                 }
1578 #ifdef BLOCKMOVE
1579                 while (0 < (small_count = min_t(unsigned int,
1580                                 tx_bufsize - tx_put, min_t(unsigned int,
1581                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1582                                         min_t(unsigned int, info->xmit_cnt,
1583                                                 char_count))))) {
1584
1585                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1586                                         tx_put),
1587                                         &info->port.xmit_buf[info->xmit_tail],
1588                                         small_count);
1589
1590                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1591                         char_count -= small_count;
1592                         info->icount.tx += small_count;
1593                         info->xmit_cnt -= small_count;
1594                         info->xmit_tail = (info->xmit_tail + small_count) &
1595                                         (SERIAL_XMIT_SIZE - 1);
1596                 }
1597 #else
1598                 while (info->xmit_cnt && char_count) {
1599                         data = info->port.xmit_buf[info->xmit_tail];
1600                         info->xmit_cnt--;
1601                         info->xmit_tail = (info->xmit_tail + 1) &
1602                                         (SERIAL_XMIT_SIZE - 1);
1603
1604                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1605                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1606                         char_count--;
1607                         info->icount.tx++;
1608                 }
1609 #endif
1610                 tty_wakeup(tty);
1611 ztxdone:
1612                 /* Update tx_put */
1613                 cy_writel(&buf_ctrl->tx_put, tx_put);
1614         }
1615 }
1616
1617 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1618 {
1619         struct tty_struct *tty;
1620         struct cyclades_port *info;
1621         static struct FIRM_ID __iomem *firm_id;
1622         static struct ZFW_CTRL __iomem *zfw_ctrl;
1623         static struct BOARD_CTRL __iomem *board_ctrl;
1624         static struct CH_CTRL __iomem *ch_ctrl;
1625         static struct BUF_CTRL __iomem *buf_ctrl;
1626         __u32 channel;
1627         __u8 cmd;
1628         __u32 param;
1629         __u32 hw_ver, fw_ver;
1630         int special_count;
1631         int delta_count;
1632
1633         firm_id = cinfo->base_addr + ID_ADDRESS;
1634         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1635         board_ctrl = &zfw_ctrl->board_ctrl;
1636         fw_ver = readl(&board_ctrl->fw_version);
1637         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1638                         mail_box_0);
1639
1640         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1641                 special_count = 0;
1642                 delta_count = 0;
1643                 info = &cinfo->ports[channel];
1644                 tty = info->port.tty;
1645                 if (tty == NULL)
1646                         continue;
1647
1648                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1649                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1650
1651                 switch (cmd) {
1652                 case C_CM_PR_ERROR:
1653                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1654                         info->icount.rx++;
1655                         special_count++;
1656                         break;
1657                 case C_CM_FR_ERROR:
1658                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1659                         info->icount.rx++;
1660                         special_count++;
1661                         break;
1662                 case C_CM_RXBRK:
1663                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1664                         info->icount.rx++;
1665                         special_count++;
1666                         break;
1667                 case C_CM_MDCD:
1668                         info->icount.dcd++;
1669                         delta_count++;
1670                         if (info->port.flags & ASYNC_CHECK_CD) {
1671                                 if ((fw_ver > 241 ? ((u_long) param) :
1672                                                 readl(&ch_ctrl->rs_status)) &
1673                                                 C_RS_DCD) {
1674                                         wake_up_interruptible(&info->port.open_wait);
1675                                 } else {
1676                                         tty_hangup(info->port.tty);
1677                                         wake_up_interruptible(&info->port.open_wait);
1678                                         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1679                                 }
1680                         }
1681                         break;
1682                 case C_CM_MCTS:
1683                         info->icount.cts++;
1684                         delta_count++;
1685                         break;
1686                 case C_CM_MRI:
1687                         info->icount.rng++;
1688                         delta_count++;
1689                         break;
1690                 case C_CM_MDSR:
1691                         info->icount.dsr++;
1692                         delta_count++;
1693                         break;
1694 #ifdef Z_WAKE
1695                 case C_CM_IOCTLW:
1696                         complete(&info->shutdown_wait);
1697                         break;
1698 #endif
1699 #ifdef CONFIG_CYZ_INTR
1700                 case C_CM_RXHIWM:
1701                 case C_CM_RXNNDT:
1702                 case C_CM_INTBACK2:
1703                         /* Reception Interrupt */
1704 #ifdef CY_DEBUG_INTERRUPTS
1705                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1706                                         "port %ld\n", info->card, channel);
1707 #endif
1708                         cyz_handle_rx(info, buf_ctrl);
1709                         break;
1710                 case C_CM_TXBEMPTY:
1711                 case C_CM_TXLOWWM:
1712                 case C_CM_INTBACK:
1713                         /* Transmission Interrupt */
1714 #ifdef CY_DEBUG_INTERRUPTS
1715                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1716                                         "port %ld\n", info->card, channel);
1717 #endif
1718                         cyz_handle_tx(info, buf_ctrl);
1719                         break;
1720 #endif                          /* CONFIG_CYZ_INTR */
1721                 case C_CM_FATAL:
1722                         /* should do something with this !!! */
1723                         break;
1724                 default:
1725                         break;
1726                 }
1727                 if (delta_count)
1728                         wake_up_interruptible(&info->delta_msr_wait);
1729                 if (special_count)
1730                         tty_schedule_flip(tty);
1731         }
1732 }
1733
1734 #ifdef CONFIG_CYZ_INTR
1735 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1736 {
1737         struct cyclades_card *cinfo = dev_id;
1738
1739         if (unlikely(cinfo == NULL)) {
1740 #ifdef CY_DEBUG_INTERRUPTS
1741                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",
1742                                                                         irq);
1743 #endif
1744                 return IRQ_NONE;        /* spurious interrupt */
1745         }
1746
1747         if (unlikely(!ISZLOADED(*cinfo))) {
1748 #ifdef CY_DEBUG_INTERRUPTS
1749                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1750                                 "(IRQ%d).\n", irq);
1751 #endif
1752                 return IRQ_NONE;
1753         }
1754
1755         /* Handle the interrupts */
1756         cyz_handle_cmd(cinfo);
1757
1758         return IRQ_HANDLED;
1759 }                               /* cyz_interrupt */
1760
1761 static void cyz_rx_restart(unsigned long arg)
1762 {
1763         struct cyclades_port *info = (struct cyclades_port *)arg;
1764         struct cyclades_card *card = info->card;
1765         int retval;
1766         __u32 channel = info->line - card->first_line;
1767         unsigned long flags;
1768
1769         spin_lock_irqsave(&card->card_lock, flags);
1770         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1771         if (retval != 0) {
1772                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1773                         info->line, retval);
1774         }
1775         spin_unlock_irqrestore(&card->card_lock, flags);
1776 }
1777
1778 #else                           /* CONFIG_CYZ_INTR */
1779
1780 static void cyz_poll(unsigned long arg)
1781 {
1782         struct cyclades_card *cinfo;
1783         struct cyclades_port *info;
1784         struct tty_struct *tty;
1785         struct FIRM_ID __iomem *firm_id;
1786         struct ZFW_CTRL __iomem *zfw_ctrl;
1787         struct BOARD_CTRL __iomem *board_ctrl;
1788         struct BUF_CTRL __iomem *buf_ctrl;
1789         unsigned long expires = jiffies + HZ;
1790         unsigned int port, card;
1791
1792         for (card = 0; card < NR_CARDS; card++) {
1793                 cinfo = &cy_card[card];
1794
1795                 if (!IS_CYC_Z(*cinfo))
1796                         continue;
1797                 if (!ISZLOADED(*cinfo))
1798                         continue;
1799
1800                 firm_id = cinfo->base_addr + ID_ADDRESS;
1801                 zfw_ctrl = cinfo->base_addr +
1802                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1803                 board_ctrl = &(zfw_ctrl->board_ctrl);
1804
1805         /* Skip first polling cycle to avoid racing conditions with the FW */
1806                 if (!cinfo->intr_enabled) {
1807                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1808                         cinfo->intr_enabled = 1;
1809                         continue;
1810                 }
1811
1812                 cyz_handle_cmd(cinfo);
1813
1814                 for (port = 0; port < cinfo->nports; port++) {
1815                         info = &cinfo->ports[port];
1816                         tty = info->port.tty;
1817                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1818
1819                         if (!info->throttle)
1820                                 cyz_handle_rx(info, buf_ctrl);
1821                         cyz_handle_tx(info, buf_ctrl);
1822                 }
1823                 /* poll every 'cyz_polling_cycle' period */
1824                 expires = jiffies + cyz_polling_cycle;
1825         }
1826         mod_timer(&cyz_timerlist, expires);
1827 }                               /* cyz_poll */
1828
1829 #endif                          /* CONFIG_CYZ_INTR */
1830
1831 /********** End of block of Cyclades-Z specific code *********/
1832 /***********************************************************/
1833
1834 /* This is called whenever a port becomes active;
1835    interrupts are enabled and DTR & RTS are turned on.
1836  */
1837 static int startup(struct cyclades_port *info)
1838 {
1839         struct cyclades_card *card;
1840         unsigned long flags;
1841         int retval = 0;
1842         void __iomem *base_addr;
1843         int chip, channel, index;
1844         unsigned long page;
1845
1846         card = info->card;
1847         channel = info->line - card->first_line;
1848
1849         page = get_zeroed_page(GFP_KERNEL);
1850         if (!page)
1851                 return -ENOMEM;
1852
1853         spin_lock_irqsave(&card->card_lock, flags);
1854
1855         if (info->port.flags & ASYNC_INITIALIZED) {
1856                 free_page(page);
1857                 goto errout;
1858         }
1859
1860         if (!info->type) {
1861                 if (info->port.tty)
1862                         set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1863                 free_page(page);
1864                 goto errout;
1865         }
1866
1867         if (info->port.xmit_buf)
1868                 free_page(page);
1869         else
1870                 info->port.xmit_buf = (unsigned char *)page;
1871
1872         spin_unlock_irqrestore(&card->card_lock, flags);
1873
1874         set_line_char(info);
1875
1876         if (!IS_CYC_Z(*card)) {
1877                 chip = channel >> 2;
1878                 channel &= 0x03;
1879                 index = card->bus_index;
1880                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1881
1882 #ifdef CY_DEBUG_OPEN
1883                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1884                                 "base_addr %p\n",
1885                                 card, chip, channel, base_addr);
1886 #endif
1887                 spin_lock_irqsave(&card->card_lock, flags);
1888
1889                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1890
1891                 cy_writeb(base_addr + (CyRTPR << index),
1892                         (info->default_timeout ? info->default_timeout : 0x02));
1893                 /* 10ms rx timeout */
1894
1895                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1896                                 index);
1897
1898                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1899                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1900                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1901
1902 #ifdef CY_DEBUG_DTR
1903                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1904                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1905                         readb(base_addr + (CyMSVR1 << index)),
1906                         readb(base_addr + (CyMSVR2 << index)));
1907 #endif
1908
1909                 cy_writeb(base_addr + (CySRER << index),
1910                         readb(base_addr + (CySRER << index)) | CyRxData);
1911                 info->port.flags |= ASYNC_INITIALIZED;
1912
1913                 if (info->port.tty)
1914                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1915                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1916                 info->breakon = info->breakoff = 0;
1917                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1918                 info->idle_stats.in_use =
1919                 info->idle_stats.recv_idle =
1920                 info->idle_stats.xmit_idle = jiffies;
1921
1922                 spin_unlock_irqrestore(&card->card_lock, flags);
1923
1924         } else {
1925                 struct FIRM_ID __iomem *firm_id;
1926                 struct ZFW_CTRL __iomem *zfw_ctrl;
1927                 struct BOARD_CTRL __iomem *board_ctrl;
1928                 struct CH_CTRL __iomem *ch_ctrl;
1929
1930                 base_addr = card->base_addr;
1931
1932                 firm_id = base_addr + ID_ADDRESS;
1933                 if (!ISZLOADED(*card))
1934                         return -ENODEV;
1935
1936                 zfw_ctrl = card->base_addr +
1937                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1938                 board_ctrl = &zfw_ctrl->board_ctrl;
1939                 ch_ctrl = zfw_ctrl->ch_ctrl;
1940
1941 #ifdef CY_DEBUG_OPEN
1942                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1943                         "base_addr %p\n", card, channel, base_addr);
1944 #endif
1945                 spin_lock_irqsave(&card->card_lock, flags);
1946
1947                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1948 #ifdef Z_WAKE
1949 #ifdef CONFIG_CYZ_INTR
1950                 cy_writel(&ch_ctrl[channel].intr_enable,
1951                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1952                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1953 #else
1954                 cy_writel(&ch_ctrl[channel].intr_enable,
1955                           C_IN_IOCTLW | C_IN_MDCD);
1956 #endif                          /* CONFIG_CYZ_INTR */
1957 #else
1958 #ifdef CONFIG_CYZ_INTR
1959                 cy_writel(&ch_ctrl[channel].intr_enable,
1960                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1961                           C_IN_RXNNDT | C_IN_MDCD);
1962 #else
1963                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1964 #endif                          /* CONFIG_CYZ_INTR */
1965 #endif                          /* Z_WAKE */
1966
1967                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1968                 if (retval != 0) {
1969                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1970                                 "%x\n", info->line, retval);
1971                 }
1972
1973                 /* Flush RX buffers before raising DTR and RTS */
1974                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1975                 if (retval != 0) {
1976                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1977                                 "%x\n", info->line, retval);
1978                 }
1979
1980                 /* set timeout !!! */
1981                 /* set RTS and DTR !!! */
1982                 cy_writel(&ch_ctrl[channel].rs_control,
1983                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1984                         C_RS_DTR);
1985                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1986                 if (retval != 0) {
1987                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1988                                 "%x\n", info->line, retval);
1989                 }
1990 #ifdef CY_DEBUG_DTR
1991                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1992 #endif
1993
1994                 /* enable send, recv, modem !!! */
1995
1996                 info->port.flags |= ASYNC_INITIALIZED;
1997                 if (info->port.tty)
1998                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1999                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2000                 info->breakon = info->breakoff = 0;
2001                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2002                 info->idle_stats.in_use =
2003                 info->idle_stats.recv_idle =
2004                 info->idle_stats.xmit_idle = jiffies;
2005
2006                 spin_unlock_irqrestore(&card->card_lock, flags);
2007         }
2008
2009 #ifdef CY_DEBUG_OPEN
2010         printk(KERN_DEBUG "cyc startup done\n");
2011 #endif
2012         return 0;
2013
2014 errout:
2015         spin_unlock_irqrestore(&card->card_lock, flags);
2016         return retval;
2017 }                               /* startup */
2018
2019 static void start_xmit(struct cyclades_port *info)
2020 {
2021         struct cyclades_card *card;
2022         unsigned long flags;
2023         void __iomem *base_addr;
2024         int chip, channel, index;
2025
2026         card = info->card;
2027         channel = info->line - card->first_line;
2028         if (!IS_CYC_Z(*card)) {
2029                 chip = channel >> 2;
2030                 channel &= 0x03;
2031                 index = card->bus_index;
2032                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2033
2034                 spin_lock_irqsave(&card->card_lock, flags);
2035                 cy_writeb(base_addr + (CyCAR << index), channel);
2036                 cy_writeb(base_addr + (CySRER << index),
2037                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2038                 spin_unlock_irqrestore(&card->card_lock, flags);
2039         } else {
2040 #ifdef CONFIG_CYZ_INTR
2041                 int retval;
2042
2043                 spin_lock_irqsave(&card->card_lock, flags);
2044                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2045                 if (retval != 0) {
2046                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2047                                 "%x\n", info->line, retval);
2048                 }
2049                 spin_unlock_irqrestore(&card->card_lock, flags);
2050 #else                           /* CONFIG_CYZ_INTR */
2051                 /* Don't have to do anything at this time */
2052 #endif                          /* CONFIG_CYZ_INTR */
2053         }
2054 }                               /* start_xmit */
2055
2056 /*
2057  * This routine shuts down a serial port; interrupts are disabled,
2058  * and DTR is dropped if the hangup on close termio flag is on.
2059  */
2060 static void shutdown(struct cyclades_port *info)
2061 {
2062         struct cyclades_card *card;
2063         unsigned long flags;
2064         void __iomem *base_addr;
2065         int chip, channel, index;
2066
2067         if (!(info->port.flags & ASYNC_INITIALIZED))
2068                 return;
2069
2070         card = info->card;
2071         channel = info->line - card->first_line;
2072         if (!IS_CYC_Z(*card)) {
2073                 chip = channel >> 2;
2074                 channel &= 0x03;
2075                 index = card->bus_index;
2076                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2077
2078 #ifdef CY_DEBUG_OPEN
2079                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2080                                 "channel %d, base_addr %p\n",
2081                                 card, chip, channel, base_addr);
2082 #endif
2083
2084                 spin_lock_irqsave(&card->card_lock, flags);
2085
2086                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2087                 wake_up_interruptible(&info->delta_msr_wait);
2088
2089                 if (info->port.xmit_buf) {
2090                         unsigned char *temp;
2091                         temp = info->port.xmit_buf;
2092                         info->port.xmit_buf = NULL;
2093                         free_page((unsigned long)temp);
2094                 }
2095                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2096                 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2097                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2098                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2099 #ifdef CY_DEBUG_DTR
2100                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2101                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2102                                 readb(base_addr + (CyMSVR1 << index)),
2103                                 readb(base_addr + (CyMSVR2 << index)));
2104 #endif
2105                 }
2106                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2107                 /* it may be appropriate to clear _XMIT at
2108                    some later date (after testing)!!! */
2109
2110                 if (info->port.tty)
2111                         set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2112                 info->port.flags &= ~ASYNC_INITIALIZED;
2113                 spin_unlock_irqrestore(&card->card_lock, flags);
2114         } else {
2115                 struct FIRM_ID __iomem *firm_id;
2116                 struct ZFW_CTRL __iomem *zfw_ctrl;
2117                 struct BOARD_CTRL __iomem *board_ctrl;
2118                 struct CH_CTRL __iomem *ch_ctrl;
2119                 int retval;
2120
2121                 base_addr = card->base_addr;
2122 #ifdef CY_DEBUG_OPEN
2123                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2124                         "base_addr %p\n", card, channel, base_addr);
2125 #endif
2126
2127                 firm_id = base_addr + ID_ADDRESS;
2128                 if (!ISZLOADED(*card))
2129                         return;
2130
2131                 zfw_ctrl = card->base_addr +
2132                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2133                 board_ctrl = &zfw_ctrl->board_ctrl;
2134                 ch_ctrl = zfw_ctrl->ch_ctrl;
2135
2136                 spin_lock_irqsave(&card->card_lock, flags);
2137
2138                 if (info->port.xmit_buf) {
2139                         unsigned char *temp;
2140                         temp = info->port.xmit_buf;
2141                         info->port.xmit_buf = NULL;
2142                         free_page((unsigned long)temp);
2143                 }
2144
2145                 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2146                         cy_writel(&ch_ctrl[channel].rs_control,
2147                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2148                                         ~(C_RS_RTS | C_RS_DTR)));
2149                         retval = cyz_issue_cmd(info->card, channel,
2150                                         C_CM_IOCTLM, 0L);
2151                         if (retval != 0) {
2152                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2153                                         "was %x\n", info->line, retval);
2154                         }
2155 #ifdef CY_DEBUG_DTR
2156                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2157 #endif
2158                 }
2159
2160                 if (info->port.tty)
2161                         set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2162                 info->port.flags &= ~ASYNC_INITIALIZED;
2163
2164                 spin_unlock_irqrestore(&card->card_lock, flags);
2165         }
2166
2167 #ifdef CY_DEBUG_OPEN
2168         printk(KERN_DEBUG "cyc shutdown done\n");
2169 #endif
2170 }                               /* shutdown */
2171
2172 /*
2173  * ------------------------------------------------------------
2174  * cy_open() and friends
2175  * ------------------------------------------------------------
2176  */
2177
2178 static int
2179 block_til_ready(struct tty_struct *tty, struct file *filp,
2180                 struct cyclades_port *info)
2181 {
2182         DECLARE_WAITQUEUE(wait, current);
2183         struct cyclades_card *cinfo;
2184         unsigned long flags;
2185         int chip, channel, index;
2186         int retval;
2187         void __iomem *base_addr;
2188
2189         cinfo = info->card;
2190         channel = info->line - cinfo->first_line;
2191
2192         /*
2193          * If the device is in the middle of being closed, then block
2194          * until it's done, and then try again.
2195          */
2196         if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2197                 wait_event_interruptible(info->port.close_wait,
2198                                 !(info->port.flags & ASYNC_CLOSING));
2199                 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2200         }
2201
2202         /*
2203          * If non-blocking mode is set, then make the check up front
2204          * and then exit.
2205          */
2206         if ((filp->f_flags & O_NONBLOCK) ||
2207                                         (tty->flags & (1 << TTY_IO_ERROR))) {
2208                 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2209                 return 0;
2210         }
2211
2212         /*
2213          * Block waiting for the carrier detect and the line to become
2214          * free (i.e., not in use by the callout).  While we are in
2215          * this loop, info->port.count is dropped by one, so that
2216          * cy_close() knows when to free things.  We restore it upon
2217          * exit, either normal or abnormal.
2218          */
2219         retval = 0;
2220         add_wait_queue(&info->port.open_wait, &wait);
2221 #ifdef CY_DEBUG_OPEN
2222         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2223                 "count = %d\n", info->line, info->port.count);
2224 #endif
2225         spin_lock_irqsave(&cinfo->card_lock, flags);
2226         if (!tty_hung_up_p(filp))
2227                 info->port.count--;
2228         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2229 #ifdef CY_DEBUG_COUNT
2230         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2231                 "%d\n", current->pid, info->port.count);
2232 #endif
2233         info->port.blocked_open++;
2234
2235         if (!IS_CYC_Z(*cinfo)) {
2236                 chip = channel >> 2;
2237                 channel &= 0x03;
2238                 index = cinfo->bus_index;
2239                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2240
2241                 while (1) {
2242                         spin_lock_irqsave(&cinfo->card_lock, flags);
2243                         if ((tty->termios->c_cflag & CBAUD)) {
2244                                 cy_writeb(base_addr + (CyCAR << index),
2245                                           (u_char) channel);
2246                                 cy_writeb(base_addr + (CyMSVR1 << index),
2247                                           CyRTS);
2248                                 cy_writeb(base_addr + (CyMSVR2 << index),
2249                                           CyDTR);
2250 #ifdef CY_DEBUG_DTR
2251                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2252                                         "DTR\n");
2253                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2254                                         readb(base_addr + (CyMSVR1 << index)),
2255                                         readb(base_addr + (CyMSVR2 << index)));
2256 #endif
2257                         }
2258                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2259
2260                         set_current_state(TASK_INTERRUPTIBLE);
2261                         if (tty_hung_up_p(filp) ||
2262                                         !(info->port.flags & ASYNC_INITIALIZED)) {
2263                                 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2264                                           -EAGAIN : -ERESTARTSYS);
2265                                 break;
2266                         }
2267
2268                         spin_lock_irqsave(&cinfo->card_lock, flags);
2269                         cy_writeb(base_addr + (CyCAR << index),
2270                                   (u_char) channel);
2271                         if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2272                                         (readb(base_addr +
2273                                                 (CyMSVR1 << index)) & CyDCD))) {
2274                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2275                                 break;
2276                         }
2277                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2278
2279                         if (signal_pending(current)) {
2280                                 retval = -ERESTARTSYS;
2281                                 break;
2282                         }
2283 #ifdef CY_DEBUG_OPEN
2284                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2285                                 "ttyC%d, count = %d\n",
2286                                 info->line, info->port.count);
2287 #endif
2288                         schedule();
2289                 }
2290         } else {
2291                 struct FIRM_ID __iomem *firm_id;
2292                 struct ZFW_CTRL __iomem *zfw_ctrl;
2293                 struct BOARD_CTRL __iomem *board_ctrl;
2294                 struct CH_CTRL __iomem *ch_ctrl;
2295
2296                 base_addr = cinfo->base_addr;
2297                 firm_id = base_addr + ID_ADDRESS;
2298                 if (!ISZLOADED(*cinfo)) {
2299                         __set_current_state(TASK_RUNNING);
2300                         remove_wait_queue(&info->port.open_wait, &wait);
2301                         return -EINVAL;
2302                 }
2303
2304                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2305                                                                 & 0xfffff);
2306                 board_ctrl = &zfw_ctrl->board_ctrl;
2307                 ch_ctrl = zfw_ctrl->ch_ctrl;
2308
2309                 while (1) {
2310                         if ((tty->termios->c_cflag & CBAUD)) {
2311                                 cy_writel(&ch_ctrl[channel].rs_control,
2312                                         readl(&ch_ctrl[channel].rs_control) |
2313                                         C_RS_RTS | C_RS_DTR);
2314                                 retval = cyz_issue_cmd(cinfo,
2315                                         channel, C_CM_IOCTLM, 0L);
2316                                 if (retval != 0) {
2317                                         printk(KERN_ERR "cyc:block_til_ready "
2318                                                 "retval on ttyC%d was %x\n",
2319                                                 info->line, retval);
2320                                 }
2321 #ifdef CY_DEBUG_DTR
2322                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2323                                         "Z DTR\n");
2324 #endif
2325                         }
2326
2327                         set_current_state(TASK_INTERRUPTIBLE);
2328                         if (tty_hung_up_p(filp) ||
2329                                         !(info->port.flags & ASYNC_INITIALIZED)) {
2330                                 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2331                                           -EAGAIN : -ERESTARTSYS);
2332                                 break;
2333                         }
2334                         if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2335                                         (readl(&ch_ctrl[channel].rs_status) &
2336                                                 C_RS_DCD))) {
2337                                 break;
2338                         }
2339                         if (signal_pending(current)) {
2340                                 retval = -ERESTARTSYS;
2341                                 break;
2342                         }
2343 #ifdef CY_DEBUG_OPEN
2344                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2345                                 "ttyC%d, count = %d\n",
2346                                 info->line, info->port.count);
2347 #endif
2348                         schedule();
2349                 }
2350         }
2351         __set_current_state(TASK_RUNNING);
2352         remove_wait_queue(&info->port.open_wait, &wait);
2353         if (!tty_hung_up_p(filp)) {
2354                 info->port.count++;
2355 #ifdef CY_DEBUG_COUNT
2356                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2357                         "count to %d\n", current->pid, info->port.count);
2358 #endif
2359         }
2360         info->port.blocked_open--;
2361 #ifdef CY_DEBUG_OPEN
2362         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2363                 "count = %d\n", info->line, info->port.count);
2364 #endif
2365         if (retval)
2366                 return retval;
2367         info->port.flags |= ASYNC_NORMAL_ACTIVE;
2368         return 0;
2369 }                               /* block_til_ready */
2370
2371 /*
2372  * This routine is called whenever a serial port is opened.  It
2373  * performs the serial-specific initialization for the tty structure.
2374  */
2375 static int cy_open(struct tty_struct *tty, struct file *filp)
2376 {
2377         struct cyclades_port *info;
2378         unsigned int i, line;
2379         int retval;
2380
2381         line = tty->index;
2382         if (tty->index < 0 || NR_PORTS <= line)
2383                 return -ENODEV;
2384
2385         for (i = 0; i < NR_CARDS; i++)
2386                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2387                                 line >= cy_card[i].first_line)
2388                         break;
2389         if (i >= NR_CARDS)
2390                 return -ENODEV;
2391         info = &cy_card[i].ports[line - cy_card[i].first_line];
2392         if (info->line < 0)
2393                 return -ENODEV;
2394
2395         /* If the card's firmware hasn't been loaded,
2396            treat it as absent from the system.  This
2397            will make the user pay attention.
2398          */
2399         if (IS_CYC_Z(*info->card)) {
2400                 struct cyclades_card *cinfo = info->card;
2401                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2402
2403                 if (!ISZLOADED(*cinfo)) {
2404                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2405                                          (cinfo->ctl_addr))->mail_box_0)) &&
2406                                         Z_FPGA_CHECK(*cinfo)) &&
2407                                         (ZFIRM_HLT == readl(
2408                                                 &firm_id->signature))) {
2409                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2410                                         "need an external power supply for "
2411                                         "this number of ports.\nFirmware "
2412                                         "halted.\n");
2413                         } else {
2414                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2415                                         "yet loaded\n");
2416                         }
2417                         return -ENODEV;
2418                 }
2419 #ifdef CONFIG_CYZ_INTR
2420                 else {
2421                 /* In case this Z board is operating in interrupt mode, its
2422                    interrupts should be enabled as soon as the first open
2423                    happens to one of its ports. */
2424                         if (!cinfo->intr_enabled) {
2425                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2426                                 struct BOARD_CTRL __iomem *board_ctrl;
2427
2428                                 zfw_ctrl = cinfo->base_addr +
2429                                         (readl(&firm_id->zfwctrl_addr) &
2430                                          0xfffff);
2431
2432                                 board_ctrl = &zfw_ctrl->board_ctrl;
2433
2434                                 /* Enable interrupts on the PLX chip */
2435                                 cy_writew(cinfo->ctl_addr + 0x68,
2436                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2437                                 /* Enable interrupts on the FW */
2438                                 retval = cyz_issue_cmd(cinfo, 0,
2439                                                 C_CM_IRQ_ENBL, 0L);
2440                                 if (retval != 0) {
2441                                         printk(KERN_ERR "cyc:IRQ enable retval "
2442                                                 "was %x\n", retval);
2443                                 }
2444                                 cinfo->nports =
2445                                         (int)readl(&board_ctrl->n_channel);
2446                                 cinfo->intr_enabled = 1;
2447                         }
2448                 }
2449 #endif                          /* CONFIG_CYZ_INTR */
2450                 /* Make sure this Z port really exists in hardware */
2451                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2452                         return -ENODEV;
2453         }
2454 #ifdef CY_DEBUG_OTHER
2455         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2456 #endif
2457         tty->driver_data = info;
2458         info->port.tty = tty;
2459         if (serial_paranoia_check(info, tty->name, "cy_open"))
2460                 return -ENODEV;
2461
2462 #ifdef CY_DEBUG_OPEN
2463         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2464                         info->port.count);
2465 #endif
2466         info->port.count++;
2467 #ifdef CY_DEBUG_COUNT
2468         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2469                 current->pid, info->port.count);
2470 #endif
2471
2472         /*
2473          * If the port is the middle of closing, bail out now
2474          */
2475         if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2476                 wait_event_interruptible(info->port.close_wait,
2477                                 !(info->port.flags & ASYNC_CLOSING));
2478                 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2479         }
2480
2481         /*
2482          * Start up serial port
2483          */
2484         retval = startup(info);
2485         if (retval)
2486                 return retval;
2487
2488         retval = block_til_ready(tty, filp, info);
2489         if (retval) {
2490 #ifdef CY_DEBUG_OPEN
2491                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2492                         "with %d\n", retval);
2493 #endif
2494                 return retval;
2495         }
2496
2497         info->throttle = 0;
2498
2499 #ifdef CY_DEBUG_OPEN
2500         printk(KERN_DEBUG "cyc:cy_open done\n");
2501 #endif
2502         return 0;
2503 }                               /* cy_open */
2504
2505 /*
2506  * cy_wait_until_sent() --- wait until the transmitter is empty
2507  */
2508 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2509 {
2510         struct cyclades_card *card;
2511         struct cyclades_port *info = tty->driver_data;
2512         void __iomem *base_addr;
2513         int chip, channel, index;
2514         unsigned long orig_jiffies;
2515         int char_time;
2516
2517         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2518                 return;
2519
2520         if (info->xmit_fifo_size == 0)
2521                 return;         /* Just in case.... */
2522
2523         orig_jiffies = jiffies;
2524         lock_kernel();
2525         /*
2526          * Set the check interval to be 1/5 of the estimated time to
2527          * send a single character, and make it at least 1.  The check
2528          * interval should also be less than the timeout.
2529          *
2530          * Note: we have to use pretty tight timings here to satisfy
2531          * the NIST-PCTS.
2532          */
2533         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2534         char_time = char_time / 5;
2535         if (char_time <= 0)
2536                 char_time = 1;
2537         if (timeout < 0)
2538                 timeout = 0;
2539         if (timeout)
2540                 char_time = min(char_time, timeout);
2541         /*
2542          * If the transmitter hasn't cleared in twice the approximate
2543          * amount of time to send the entire FIFO, it probably won't
2544          * ever clear.  This assumes the UART isn't doing flow
2545          * control, which is currently the case.  Hence, if it ever
2546          * takes longer than info->timeout, this is probably due to a
2547          * UART bug of some kind.  So, we clamp the timeout parameter at
2548          * 2*info->timeout.
2549          */
2550         if (!timeout || timeout > 2 * info->timeout)
2551                 timeout = 2 * info->timeout;
2552 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2553         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2554                 timeout, char_time, jiffies);
2555 #endif
2556         card = info->card;
2557         channel = (info->line) - (card->first_line);
2558         if (!IS_CYC_Z(*card)) {
2559                 chip = channel >> 2;
2560                 channel &= 0x03;
2561                 index = card->bus_index;
2562                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2563                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2564 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2565                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2566 #endif
2567                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2568                                 break;
2569                         if (timeout && time_after(jiffies, orig_jiffies +
2570                                         timeout))
2571                                 break;
2572                 }
2573         }
2574         /* Run one more char cycle */
2575         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2576         unlock_kernel();
2577 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2578         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2579 #endif
2580 }
2581
2582 static void cy_flush_buffer(struct tty_struct *tty)
2583 {
2584         struct cyclades_port *info = tty->driver_data;
2585         struct cyclades_card *card;
2586         int channel, retval;
2587         unsigned long flags;
2588
2589 #ifdef CY_DEBUG_IO
2590         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2591 #endif
2592
2593         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2594                 return;
2595
2596         card = info->card;
2597         channel = info->line - card->first_line;
2598
2599         spin_lock_irqsave(&card->card_lock, flags);
2600         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2601         spin_unlock_irqrestore(&card->card_lock, flags);
2602
2603         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
2604                                            buffers as well */
2605                 spin_lock_irqsave(&card->card_lock, flags);
2606                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2607                 if (retval != 0) {
2608                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2609                                 "was %x\n", info->line, retval);
2610                 }
2611                 spin_unlock_irqrestore(&card->card_lock, flags);
2612         }
2613         tty_wakeup(tty);
2614 }                               /* cy_flush_buffer */
2615
2616
2617 /*
2618  * This routine is called when a particular tty device is closed.
2619  */
2620 static void cy_close(struct tty_struct *tty, struct file *filp)
2621 {
2622         struct cyclades_port *info = tty->driver_data;
2623         struct cyclades_card *card;
2624         unsigned long flags;
2625
2626 #ifdef CY_DEBUG_OTHER
2627         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2628 #endif
2629
2630         if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2631                 return;
2632
2633         card = info->card;
2634
2635         spin_lock_irqsave(&card->card_lock, flags);
2636         /* If the TTY is being hung up, nothing to do */
2637         if (tty_hung_up_p(filp)) {
2638                 spin_unlock_irqrestore(&card->card_lock, flags);
2639                 return;
2640         }
2641 #ifdef CY_DEBUG_OPEN
2642         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2643                 info->port.count);
2644 #endif
2645         if ((tty->count == 1) && (info->port.count != 1)) {
2646                 /*
2647                  * Uh, oh.  tty->count is 1, which means that the tty
2648                  * structure will be freed.  Info->count should always
2649                  * be one in these conditions.  If it's greater than
2650                  * one, we've got real problems, since it means the
2651                  * serial port won't be shutdown.
2652                  */
2653                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2654                         "tty->count is 1, info->port.count is %d\n", info->port.count);
2655                 info->port.count = 1;
2656         }
2657 #ifdef CY_DEBUG_COUNT
2658         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2659                 current->pid, info->port.count - 1);
2660 #endif
2661         if (--info->port.count < 0) {
2662 #ifdef CY_DEBUG_COUNT
2663                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2664 #endif
2665                 info->port.count = 0;
2666         }
2667         if (info->port.count) {
2668                 spin_unlock_irqrestore(&card->card_lock, flags);
2669                 return;
2670         }
2671         info->port.flags |= ASYNC_CLOSING;
2672
2673         /*
2674          * Now we wait for the transmit buffer to clear; and we notify
2675          * the line discipline to only process XON/XOFF characters.
2676          */
2677         tty->closing = 1;
2678         spin_unlock_irqrestore(&card->card_lock, flags);
2679         if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2680                 tty_wait_until_sent(tty, info->port.closing_wait);
2681
2682         spin_lock_irqsave(&card->card_lock, flags);
2683
2684         if (!IS_CYC_Z(*card)) {
2685                 int channel = info->line - card->first_line;
2686                 int index = card->bus_index;
2687                 void __iomem *base_addr = card->base_addr +
2688                         (cy_chip_offset[channel >> 2] << index);
2689                 /* Stop accepting input */
2690                 channel &= 0x03;
2691                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2692                 cy_writeb(base_addr + (CySRER << index),
2693                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2694                 if (info->port.flags & ASYNC_INITIALIZED) {
2695                         /* Waiting for on-board buffers to be empty before
2696                            closing the port */
2697                         spin_unlock_irqrestore(&card->card_lock, flags);
2698                         cy_wait_until_sent(tty, info->timeout);
2699                         spin_lock_irqsave(&card->card_lock, flags);
2700                 }
2701         } else {
2702 #ifdef Z_WAKE
2703                 /* Waiting for on-board buffers to be empty before closing
2704                    the port */
2705                 void __iomem *base_addr = card->base_addr;
2706                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2707                 struct ZFW_CTRL __iomem *zfw_ctrl =
2708                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2709                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2710                 int channel = info->line - card->first_line;
2711                 int retval;
2712
2713                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2714                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2715                         if (retval != 0) {
2716                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2717                                         "ttyC%d was %x\n", info->line, retval);
2718                         }
2719                         spin_unlock_irqrestore(&card->card_lock, flags);
2720                         wait_for_completion_interruptible(&info->shutdown_wait);
2721                         spin_lock_irqsave(&card->card_lock, flags);
2722                 }
2723 #endif
2724         }
2725
2726         spin_unlock_irqrestore(&card->card_lock, flags);
2727         shutdown(info);
2728         cy_flush_buffer(tty);
2729         tty_ldisc_flush(tty);
2730         spin_lock_irqsave(&card->card_lock, flags);
2731
2732         tty->closing = 0;
2733         info->port.tty = NULL;
2734         if (info->port.blocked_open) {
2735                 spin_unlock_irqrestore(&card->card_lock, flags);
2736                 if (info->port.close_delay) {
2737                         msleep_interruptible(jiffies_to_msecs
2738                                                 (info->port.close_delay));
2739                 }
2740                 wake_up_interruptible(&info->port.open_wait);
2741                 spin_lock_irqsave(&card->card_lock, flags);
2742         }
2743         info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2744         wake_up_interruptible(&info->port.close_wait);
2745
2746 #ifdef CY_DEBUG_OTHER
2747         printk(KERN_DEBUG "cyc:cy_close done\n");
2748 #endif
2749
2750         spin_unlock_irqrestore(&card->card_lock, flags);
2751 }                               /* cy_close */
2752
2753 /* This routine gets called when tty_write has put something into
2754  * the write_queue.  The characters may come from user space or
2755  * kernel space.
2756  *
2757  * This routine will return the number of characters actually
2758  * accepted for writing.
2759  *
2760  * If the port is not already transmitting stuff, start it off by
2761  * enabling interrupts.  The interrupt service routine will then
2762  * ensure that the characters are sent.
2763  * If the port is already active, there is no need to kick it.
2764  *
2765  */
2766 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2767 {
2768         struct cyclades_port *info = tty->driver_data;
2769         unsigned long flags;
2770         int c, ret = 0;
2771
2772 #ifdef CY_DEBUG_IO
2773         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2774 #endif
2775
2776         if (serial_paranoia_check(info, tty->name, "cy_write"))
2777                 return 0;
2778
2779         if (!info->port.xmit_buf)
2780                 return 0;
2781
2782         spin_lock_irqsave(&info->card->card_lock, flags);
2783         while (1) {
2784                 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2785                 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2786
2787                 if (c <= 0)
2788                         break;
2789
2790                 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2791                 info->xmit_head = (info->xmit_head + c) &
2792                         (SERIAL_XMIT_SIZE - 1);
2793                 info->xmit_cnt += c;
2794                 buf += c;
2795                 count -= c;
2796                 ret += c;
2797         }
2798         spin_unlock_irqrestore(&info->card->card_lock, flags);
2799
2800         info->idle_stats.xmit_bytes += ret;
2801         info->idle_stats.xmit_idle = jiffies;
2802
2803         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2804                 start_xmit(info);
2805
2806         return ret;
2807 }                               /* cy_write */
2808
2809 /*
2810  * This routine is called by the kernel to write a single
2811  * character to the tty device.  If the kernel uses this routine,
2812  * it must call the flush_chars() routine (if defined) when it is
2813  * done stuffing characters into the driver.  If there is no room
2814  * in the queue, the character is ignored.
2815  */
2816 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2817 {
2818         struct cyclades_port *info = tty->driver_data;
2819         unsigned long flags;
2820
2821 #ifdef CY_DEBUG_IO
2822         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2823 #endif
2824
2825         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2826                 return 0;
2827
2828         if (!info->port.xmit_buf)
2829                 return 0;
2830
2831         spin_lock_irqsave(&info->card->card_lock, flags);
2832         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2833                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2834                 return 0;
2835         }
2836
2837         info->port.xmit_buf[info->xmit_head++] = ch;
2838         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2839         info->xmit_cnt++;
2840         info->idle_stats.xmit_bytes++;
2841         info->idle_stats.xmit_idle = jiffies;
2842         spin_unlock_irqrestore(&info->card->card_lock, flags);
2843         return 1;
2844 }                               /* cy_put_char */
2845
2846 /*
2847  * This routine is called by the kernel after it has written a
2848  * series of characters to the tty device using put_char().
2849  */
2850 static void cy_flush_chars(struct tty_struct *tty)
2851 {
2852         struct cyclades_port *info = tty->driver_data;
2853
2854 #ifdef CY_DEBUG_IO
2855         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2856 #endif
2857
2858         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2859                 return;
2860
2861         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2862                         !info->port.xmit_buf)
2863                 return;
2864
2865         start_xmit(info);
2866 }                               /* cy_flush_chars */
2867
2868 /*
2869  * This routine returns the numbers of characters the tty driver
2870  * will accept for queuing to be written.  This number is subject
2871  * to change as output buffers get emptied, or if the output flow
2872  * control is activated.
2873  */
2874 static int cy_write_room(struct tty_struct *tty)
2875 {
2876         struct cyclades_port *info = tty->driver_data;
2877         int ret;
2878
2879 #ifdef CY_DEBUG_IO
2880         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2881 #endif
2882
2883         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2884                 return 0;
2885         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2886         if (ret < 0)
2887                 ret = 0;
2888         return ret;
2889 }                               /* cy_write_room */
2890
2891 static int cy_chars_in_buffer(struct tty_struct *tty)
2892 {
2893         struct cyclades_card *card;
2894         struct cyclades_port *info = tty->driver_data;
2895         int channel;
2896
2897         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2898                 return 0;
2899
2900         card = info->card;
2901         channel = (info->line) - (card->first_line);
2902
2903 #ifdef Z_EXT_CHARS_IN_BUFFER
2904         if (!IS_CYC_Z(cy_card[card])) {
2905 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2906 #ifdef CY_DEBUG_IO
2907                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2908                         info->line, info->xmit_cnt);
2909 #endif
2910                 return info->xmit_cnt;
2911 #ifdef Z_EXT_CHARS_IN_BUFFER
2912         } else {
2913                 static struct FIRM_ID *firm_id;
2914                 static struct ZFW_CTRL *zfw_ctrl;
2915                 static struct CH_CTRL *ch_ctrl;
2916                 static struct BUF_CTRL *buf_ctrl;
2917                 int char_count;
2918                 __u32 tx_put, tx_get, tx_bufsize;
2919
2920                 lock_kernel();
2921                 firm_id = card->base_addr + ID_ADDRESS;
2922                 zfw_ctrl = card->base_addr +
2923                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2924                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2925                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2926
2927                 tx_get = readl(&buf_ctrl->tx_get);
2928                 tx_put = readl(&buf_ctrl->tx_put);
2929                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2930                 if (tx_put >= tx_get)
2931                         char_count = tx_put - tx_get;
2932                 else
2933                         char_count = tx_put - tx_get + tx_bufsize;
2934 #ifdef CY_DEBUG_IO
2935                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2936                         info->line, info->xmit_cnt + char_count);
2937 #endif
2938                 unlock_kernel();
2939                 return info->xmit_cnt + char_count;
2940         }
2941 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2942 }                               /* cy_chars_in_buffer */
2943
2944 /*
2945  * ------------------------------------------------------------
2946  * cy_ioctl() and friends
2947  * ------------------------------------------------------------
2948  */
2949
2950 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2951 {
2952         int co, co_val, bpr;
2953         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2954                         25000000);
2955
2956         if (baud == 0) {
2957                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2958                 return;
2959         }
2960
2961         /* determine which prescaler to use */
2962         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2963                 if (cy_clock / co_val / baud > 63)
2964                         break;
2965         }
2966
2967         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2968         if (bpr > 255)
2969                 bpr = 255;
2970
2971         info->tbpr = info->rbpr = bpr;
2972         info->tco = info->rco = co;
2973 }
2974
2975 /*
2976  * This routine finds or computes the various line characteristics.
2977  * It used to be called config_setup
2978  */
2979 static void set_line_char(struct cyclades_port *info)
2980 {
2981         struct cyclades_card *card;
2982         unsigned long flags;
2983         void __iomem *base_addr;
2984         int chip, channel, index;
2985         unsigned cflag, iflag;
2986         unsigned short chip_number;
2987         int baud, baud_rate = 0;
2988         int i;
2989
2990         if (!info->port.tty || !info->port.tty->termios)
2991                 return;
2992
2993         if (info->line == -1)
2994                 return;
2995
2996         cflag = info->port.tty->termios->c_cflag;
2997         iflag = info->port.tty->termios->c_iflag;
2998
2999         /*
3000          * Set up the tty->alt_speed kludge
3001          */
3002         if (info->port.tty) {
3003                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3004                         info->port.tty->alt_speed = 57600;
3005                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3006                         info->port.tty->alt_speed = 115200;
3007                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3008                         info->port.tty->alt_speed = 230400;
3009                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3010                         info->port.tty->alt_speed = 460800;
3011         }
3012
3013         card = info->card;
3014         channel = info->line - card->first_line;
3015         chip_number = channel / 4;
3016
3017         if (!IS_CYC_Z(*card)) {
3018
3019                 index = card->bus_index;
3020
3021                 /* baud rate */
3022                 baud = tty_get_baud_rate(info->port.tty);
3023                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3024                                 ASYNC_SPD_CUST) {
3025                         if (info->custom_divisor)
3026                                 baud_rate = info->baud / info->custom_divisor;
3027                         else
3028                                 baud_rate = info->baud;
3029                 } else if (baud > CD1400_MAX_SPEED) {
3030                         baud = CD1400_MAX_SPEED;
3031                 }
3032                 /* find the baud index */
3033                 for (i = 0; i < 20; i++) {
3034                         if (baud == baud_table[i])
3035                                 break;
3036                 }
3037                 if (i == 20)
3038                         i = 19; /* CD1400_MAX_SPEED */
3039
3040                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3041                                 ASYNC_SPD_CUST) {
3042                         cyy_baud_calc(info, baud_rate);
3043                 } else {
3044                         if (info->chip_rev >= CD1400_REV_J) {
3045                                 /* It is a CD1400 rev. J or later */
3046                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3047                                 info->tco = baud_co_60[i];      /* Tx CO */
3048                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3049                                 info->rco = baud_co_60[i];      /* Rx CO */
3050                         } else {
3051                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3052                                 info->tco = baud_co_25[i];      /* Tx CO */
3053                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3054                                 info->rco = baud_co_25[i];      /* Rx CO */
3055                         }
3056                 }
3057                 if (baud_table[i] == 134) {
3058                         /* get it right for 134.5 baud */
3059                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3060                                         2;
3061                 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3062                                 ASYNC_SPD_CUST) {
3063                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3064                                         baud_rate) + 2;
3065                 } else if (baud_table[i]) {
3066                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3067                                         baud_table[i]) + 2;
3068                         /* this needs to be propagated into the card info */
3069                 } else {
3070                         info->timeout = 0;
3071                 }
3072                 /* By tradition (is it a standard?) a baud rate of zero
3073                    implies the line should be/has been closed.  A bit
3074                    later in this routine such a test is performed. */
3075
3076                 /* byte size and parity */
3077                 info->cor5 = 0;
3078                 info->cor4 = 0;
3079                 /* receive threshold */
3080                 info->cor3 = (info->default_threshold ?
3081                                 info->default_threshold : baud_cor3[i]);
3082                 info->cor2 = CyETC;
3083                 switch (cflag & CSIZE) {
3084                 case CS5:
3085                         info->cor1 = Cy_5_BITS;
3086                         break;
3087                 case CS6:
3088                         info->cor1 = Cy_6_BITS;
3089                         break;
3090                 case CS7:
3091                         info->cor1 = Cy_7_BITS;
3092                         break;
3093                 case CS8:
3094                         info->cor1 = Cy_8_BITS;
3095                         break;
3096                 }
3097                 if (cflag & CSTOPB)
3098                         info->cor1 |= Cy_2_STOP;
3099
3100                 if (cflag & PARENB) {
3101                         if (cflag & PARODD)
3102                                 info->cor1 |= CyPARITY_O;
3103                         else
3104                                 info->cor1 |= CyPARITY_E;
3105                 } else
3106                         info->cor1 |= CyPARITY_NONE;
3107
3108                 /* CTS flow control flag */
3109                 if (cflag & CRTSCTS) {
3110                         info->port.flags |= ASYNC_CTS_FLOW;
3111                         info->cor2 |= CyCtsAE;
3112                 } else {
3113                         info->port.flags &= ~ASYNC_CTS_FLOW;
3114                         info->cor2 &= ~CyCtsAE;
3115                 }
3116                 if (cflag & CLOCAL)
3117                         info->port.flags &= ~ASYNC_CHECK_CD;
3118                 else
3119                         info->port.flags |= ASYNC_CHECK_CD;
3120
3121          /***********************************************
3122             The hardware option, CyRtsAO, presents RTS when
3123             the chip has characters to send.  Since most modems
3124             use RTS as reverse (inbound) flow control, this
3125             option is not used.  If inbound flow control is
3126             necessary, DTR can be programmed to provide the
3127             appropriate signals for use with a non-standard
3128             cable.  Contact Marcio Saito for details.
3129          ***********************************************/
3130
3131                 chip = channel >> 2;
3132                 channel &= 0x03;
3133                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3134
3135                 spin_lock_irqsave(&card->card_lock, flags);
3136                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3137
3138                 /* tx and rx baud rate */
3139
3140                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3141                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3142                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3143                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3144
3145                 /* set line characteristics  according configuration */
3146
3147                 cy_writeb(base_addr + (CySCHR1 << index),
3148                           START_CHAR(info->port.tty));
3149                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
3150                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3151                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3152                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3153                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3154                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3155
3156                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3157                                 CyCOR3ch, index);
3158
3159                 /* !!! Is this needed? */
3160                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3161                 cy_writeb(base_addr + (CyRTPR << index),
3162                         (info->default_timeout ? info->default_timeout : 0x02));
3163                 /* 10ms rx timeout */
3164
3165                 if (C_CLOCAL(info->port.tty)) {
3166                         /* without modem intr */
3167                         cy_writeb(base_addr + (CySRER << index),
3168                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3169                         /* act on 1->0 modem transitions */
3170                         if ((cflag & CRTSCTS) && info->rflow) {
3171                                 cy_writeb(base_addr + (CyMCOR1 << index),
3172                                           (CyCTS | rflow_thr[i]));
3173                         } else {
3174                                 cy_writeb(base_addr + (CyMCOR1 << index),
3175                                           CyCTS);
3176                         }
3177                         /* act on 0->1 modem transitions */
3178                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3179                 } else {
3180                         /* without modem intr */
3181                         cy_writeb(base_addr + (CySRER << index),
3182                                   readb(base_addr +
3183                                            (CySRER << index)) | CyMdmCh);
3184                         /* act on 1->0 modem transitions */
3185                         if ((cflag & CRTSCTS) && info->rflow) {
3186                                 cy_writeb(base_addr + (CyMCOR1 << index),
3187                                           (CyDSR | CyCTS | CyRI | CyDCD |
3188                                            rflow_thr[i]));
3189                         } else {
3190                                 cy_writeb(base_addr + (CyMCOR1 << index),
3191                                           CyDSR | CyCTS | CyRI | CyDCD);
3192                         }
3193                         /* act on 0->1 modem transitions */
3194                         cy_writeb(base_addr + (CyMCOR2 << index),
3195                                   CyDSR | CyCTS | CyRI | CyDCD);
3196                 }
3197
3198                 if (i == 0) {   /* baud rate is zero, turn off line */
3199                         if (info->rtsdtr_inv) {
3200                                 cy_writeb(base_addr + (CyMSVR1 << index),
3201                                           ~CyRTS);
3202                         } else {
3203                                 cy_writeb(base_addr + (CyMSVR2 << index),
3204                                           ~CyDTR);
3205                         }
3206 #ifdef CY_DEBUG_DTR
3207                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3208                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3209                                 readb(base_addr + (CyMSVR1 << index)),
3210                                 readb(base_addr + (CyMSVR2 << index)));
3211 #endif
3212                 } else {
3213                         if (info->rtsdtr_inv) {
3214                                 cy_writeb(base_addr + (CyMSVR1 << index),
3215                                           CyRTS);
3216                         } else {
3217                                 cy_writeb(base_addr + (CyMSVR2 << index),
3218                                           CyDTR);
3219                         }
3220 #ifdef CY_DEBUG_DTR
3221                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3222                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3223                                 readb(base_addr + (CyMSVR1 << index)),
3224                                 readb(base_addr + (CyMSVR2 << index)));
3225 #endif
3226                 }
3227
3228                 if (info->port.tty)
3229                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3230                 spin_unlock_irqrestore(&card->card_lock, flags);
3231
3232         } else {
3233                 struct FIRM_ID __iomem *firm_id;
3234                 struct ZFW_CTRL __iomem *zfw_ctrl;
3235                 struct BOARD_CTRL __iomem *board_ctrl;
3236                 struct CH_CTRL __iomem *ch_ctrl;
3237                 struct BUF_CTRL __iomem *buf_ctrl;
3238                 __u32 sw_flow;
3239                 int retval;
3240
3241                 firm_id = card->base_addr + ID_ADDRESS;
3242                 if (!ISZLOADED(*card))
3243                         return;
3244
3245                 zfw_ctrl = card->base_addr +
3246                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3247                 board_ctrl = &zfw_ctrl->board_ctrl;
3248                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3249                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3250
3251                 /* baud rate */
3252                 baud = tty_get_baud_rate(info->port.tty);
3253                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3254                                 ASYNC_SPD_CUST) {
3255                         if (info->custom_divisor)
3256                                 baud_rate = info->baud / info->custom_divisor;
3257                         else
3258                                 baud_rate = info->baud;
3259                 } else if (baud > CYZ_MAX_SPEED) {
3260                         baud = CYZ_MAX_SPEED;
3261                 }
3262                 cy_writel(&ch_ctrl->comm_baud, baud);
3263
3264                 if (baud == 134) {
3265                         /* get it right for 134.5 baud */
3266                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3267                                         2;
3268                 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3269                                 ASYNC_SPD_CUST) {
3270                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3271                                         baud_rate) + 2;
3272                 } else if (baud) {
3273                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3274                                         baud) + 2;
3275                         /* this needs to be propagated into the card info */
3276                 } else {
3277                         info->timeout = 0;
3278                 }
3279
3280                 /* byte size and parity */
3281                 switch (cflag & CSIZE) {
3282                 case CS5:
3283                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3284                         break;
3285                 case CS6:
3286                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3287                         break;
3288                 case CS7:
3289                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3290                         break;
3291                 case CS8:
3292                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3293                         break;
3294                 }
3295                 if (cflag & CSTOPB) {
3296                         cy_writel(&ch_ctrl->comm_data_l,
3297                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3298                 } else {
3299                         cy_writel(&ch_ctrl->comm_data_l,
3300                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3301                 }
3302                 if (cflag & PARENB) {
3303                         if (cflag & PARODD)
3304                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3305                         else
3306                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3307                 } else
3308                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3309
3310                 /* CTS flow control flag */
3311                 if (cflag & CRTSCTS) {
3312                         cy_writel(&ch_ctrl->hw_flow,
3313                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3314                 } else {
3315                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3316                                         ~(C_RS_CTS | C_RS_RTS));
3317                 }
3318                 /* As the HW flow control is done in firmware, the driver
3319                    doesn't need to care about it */
3320                 info->port.flags &= ~ASYNC_CTS_FLOW;
3321
3322                 /* XON/XOFF/XANY flow control flags */
3323                 sw_flow = 0;
3324                 if (iflag & IXON) {
3325                         sw_flow |= C_FL_OXX;
3326                         if (iflag & IXANY)
3327                                 sw_flow |= C_FL_OIXANY;
3328                 }
3329                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3330
3331                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3332                 if (retval != 0) {
3333                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3334                                 "was %x\n", info->line, retval);
3335                 }
3336
3337                 /* CD sensitivity */
3338                 if (cflag & CLOCAL)
3339                         info->port.flags &= ~ASYNC_CHECK_CD;
3340                 else
3341                         info->port.flags |= ASYNC_CHECK_CD;
3342
3343                 if (baud == 0) {        /* baud rate is zero, turn off line */
3344                         cy_writel(&ch_ctrl->rs_control,
3345                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3346 #ifdef CY_DEBUG_DTR
3347                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3348 #endif
3349                 } else {
3350                         cy_writel(&ch_ctrl->rs_control,
3351                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3352 #ifdef CY_DEBUG_DTR
3353                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3354 #endif
3355                 }
3356
3357                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3358                 if (retval != 0) {
3359                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3360                                 "was %x\n", info->line, retval);
3361                 }
3362
3363                 if (info->port.tty)
3364                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3365         }
3366 }                               /* set_line_char */
3367
3368 static int
3369 get_serial_info(struct cyclades_port *info,
3370                 struct serial_struct __user *retinfo)
3371 {
3372         struct serial_struct tmp;
3373         struct cyclades_card *cinfo = info->card;
3374
3375         if (!retinfo)
3376                 return -EFAULT;
3377         memset(&tmp, 0, sizeof(tmp));
3378         tmp.type = info->type;
3379         tmp.line = info->line;
3380         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3381                 cinfo->first_line;
3382         tmp.irq = cinfo->irq;
3383         tmp.flags = info->port.flags;
3384         tmp.close_delay = info->port.close_delay;
3385         tmp.closing_wait = info->port.closing_wait;
3386         tmp.baud_base = info->baud;
3387         tmp.custom_divisor = info->custom_divisor;
3388         tmp.hub6 = 0;           /*!!! */
3389         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3390 }                               /* get_serial_info */
3391
3392 static int
3393 set_serial_info(struct cyclades_port *info,
3394                 struct serial_struct __user *new_info)
3395 {
3396         struct serial_struct new_serial;
3397         struct cyclades_port old_info;
3398
3399         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3400                 return -EFAULT;
3401         old_info = *info;
3402
3403         if (!capable(CAP_SYS_ADMIN)) {
3404                 if (new_serial.close_delay != info->port.close_delay ||
3405                                 new_serial.baud_base != info->baud ||
3406                                 (new_serial.flags & ASYNC_FLAGS &
3407                                         ~ASYNC_USR_MASK) !=
3408                                 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3409                         return -EPERM;
3410                 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3411                                 (new_serial.flags & ASYNC_USR_MASK);
3412                 info->baud = new_serial.baud_base;
3413                 info->custom_divisor = new_serial.custom_divisor;
3414                 goto check_and_exit;
3415         }
3416
3417         /*
3418          * OK, past this point, all the error checking has been done.
3419          * At this point, we start making changes.....
3420          */
3421
3422         info->baud = new_serial.baud_base;
3423         info->custom_divisor = new_serial.custom_divisor;
3424         info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3425                         (new_serial.flags & ASYNC_FLAGS);
3426         info->port.close_delay = new_serial.close_delay * HZ / 100;
3427         info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3428
3429 check_and_exit:
3430         if (info->port.flags & ASYNC_INITIALIZED) {
3431                 set_line_char(info);
3432                 return 0;
3433         } else {
3434                 return startup(info);
3435         }
3436 }                               /* set_serial_info */
3437
3438 /*
3439  * get_lsr_info - get line status register info
3440  *
3441  * Purpose: Let user call ioctl() to get info when the UART physically
3442  *          is emptied.  On bus types like RS485, the transmitter must
3443  *          release the bus after transmitting. This must be done when
3444  *          the transmit shift register is empty, not be done when the
3445  *          transmit holding register is empty.  This functionality
3446  *          allows an RS485 driver to be written in user space.
3447  */
3448 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3449 {
3450         struct cyclades_card *card;
3451         int chip, channel, index;
3452         unsigned char status;
3453         unsigned int result;
3454         unsigned long flags;
3455         void __iomem *base_addr;
3456
3457         card = info->card;
3458         channel = (info->line) - (card->first_line);
3459         if (!IS_CYC_Z(*card)) {
3460                 chip = channel >> 2;
3461                 channel &= 0x03;
3462                 index = card->bus_index;
3463                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3464
3465                 spin_lock_irqsave(&card->card_lock, flags);
3466                 status = readb(base_addr + (CySRER << index)) &
3467                                 (CyTxRdy | CyTxMpty);
3468                 spin_unlock_irqrestore(&card->card_lock, flags);
3469                 result = (status ? 0 : TIOCSER_TEMT);
3470         } else {
3471                 /* Not supported yet */
3472                 return -EINVAL;
3473         }
3474         return put_user(result, (unsigned long __user *)value);
3475 }
3476
3477 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3478 {
3479         struct cyclades_port *info = tty->driver_data;
3480         struct cyclades_card *card;
3481         int chip, channel, index;
3482         void __iomem *base_addr;
3483         unsigned long flags;
3484         unsigned char status;
3485         unsigned long lstatus;
3486         unsigned int result;
3487         struct FIRM_ID __iomem *firm_id;
3488         struct ZFW_CTRL __iomem *zfw_ctrl;
3489         struct BOARD_CTRL __iomem *board_ctrl;
3490         struct CH_CTRL __iomem *ch_ctrl;
3491
3492         if (serial_paranoia_check(info, tty->name, __func__))
3493                 return -ENODEV;
3494
3495         lock_kernel();
3496
3497         card = info->card;
3498         channel = info->line - card->first_line;
3499         if (!IS_CYC_Z(*card)) {
3500                 chip = channel >> 2;
3501                 channel &= 0x03;
3502                 index = card->bus_index;
3503                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3504
3505                 spin_lock_irqsave(&card->card_lock, flags);
3506                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3507                 status = readb(base_addr + (CyMSVR1 << index));
3508                 status |= readb(base_addr + (CyMSVR2 << index));
3509                 spin_unlock_irqrestore(&card->card_lock, flags);
3510
3511                 if (info->rtsdtr_inv) {
3512                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3513                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3514                 } else {
3515                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3516                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3517                 }
3518                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3519                         ((status & CyRI) ? TIOCM_RNG : 0) |
3520                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3521                         ((status & CyCTS) ? TIOCM_CTS : 0);
3522         } else {
3523                 base_addr = card->base_addr;
3524                 firm_id = card->base_addr + ID_ADDRESS;
3525                 if (ISZLOADED(*card)) {
3526                         zfw_ctrl = card->base_addr +
3527                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3528                         board_ctrl = &zfw_ctrl->board_ctrl;
3529                         ch_ctrl = zfw_ctrl->ch_ctrl;
3530                         lstatus = readl(&ch_ctrl[channel].rs_status);
3531                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3532                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3533                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3534                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3535                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3536                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3537                 } else {
3538                         result = 0;
3539                         unlock_kernel();
3540                         return -ENODEV;
3541                 }
3542
3543         }
3544         unlock_kernel();
3545         return result;
3546 }                               /* cy_tiomget */
3547
3548 static int
3549 cy_tiocmset(struct tty_struct *tty, struct file *file,
3550                 unsigned int set, unsigned int clear)
3551 {
3552         struct cyclades_port *info = tty->driver_data;
3553         struct cyclades_card *card;
3554         int chip, channel, index;
3555         void __iomem *base_addr;
3556         unsigned long flags;
3557         struct FIRM_ID __iomem *firm_id;
3558         struct ZFW_CTRL __iomem *zfw_ctrl;
3559         struct BOARD_CTRL __iomem *board_ctrl;
3560         struct CH_CTRL __iomem *ch_ctrl;
3561         int retval;
3562
3563         if (serial_paranoia_check(info, tty->name, __func__))
3564                 return -ENODEV;
3565
3566         card = info->card;
3567         channel = (info->line) - (card->first_line);
3568         if (!IS_CYC_Z(*card)) {
3569                 chip = channel >> 2;
3570                 channel &= 0x03;
3571                 index = card->bus_index;
3572                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3573
3574                 if (set & TIOCM_RTS) {
3575                         spin_lock_irqsave(&card->card_lock, flags);
3576                         cy_writeb(base_addr + (CyCAR << index),
3577                                   (u_char) channel);
3578                         if (info->rtsdtr_inv) {
3579                                 cy_writeb(base_addr + (CyMSVR2 << index),
3580                                           CyDTR);
3581                         } else {
3582                                 cy_writeb(base_addr + (CyMSVR1 << index),
3583                                           CyRTS);
3584                         }
3585                         spin_unlock_irqrestore(&card->card_lock, flags);
3586                 }
3587                 if (clear & TIOCM_RTS) {
3588                         spin_lock_irqsave(&card->card_lock, flags);
3589                         cy_writeb(base_addr + (CyCAR << index),
3590                                   (u_char) channel);
3591                         if (info->rtsdtr_inv) {
3592                                 cy_writeb(base_addr + (CyMSVR2 << index),
3593                                           ~CyDTR);
3594                         } else {
3595                                 cy_writeb(base_addr + (CyMSVR1 << index),
3596                                           ~CyRTS);
3597                         }
3598                         spin_unlock_irqrestore(&card->card_lock, flags);
3599                 }
3600                 if (set & TIOCM_DTR) {
3601                         spin_lock_irqsave(&card->card_lock, flags);
3602                         cy_writeb(base_addr + (CyCAR << index),
3603                                   (u_char) channel);
3604                         if (info->rtsdtr_inv) {
3605                                 cy_writeb(base_addr + (CyMSVR1 << index),
3606                                           CyRTS);
3607                         } else {
3608                                 cy_writeb(base_addr + (CyMSVR2 << index),
3609                                           CyDTR);
3610                         }
3611 #ifdef CY_DEBUG_DTR
3612                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3613                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3614                                 readb(base_addr + (CyMSVR1 << index)),
3615                                 readb(base_addr + (CyMSVR2 << index)));
3616 #endif
3617                         spin_unlock_irqrestore(&card->card_lock, flags);
3618                 }
3619                 if (clear & TIOCM_DTR) {
3620                         spin_lock_irqsave(&card->card_lock, flags);
3621                         cy_writeb(base_addr + (CyCAR << index),
3622                                   (u_char) channel);
3623                         if (info->rtsdtr_inv) {
3624                                 cy_writeb(base_addr + (CyMSVR1 << index),
3625                                           ~CyRTS);
3626                         } else {
3627                                 cy_writeb(base_addr + (CyMSVR2 << index),
3628                                           ~CyDTR);
3629                         }
3630
3631 #ifdef CY_DEBUG_DTR
3632                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3633                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3634                                 readb(base_addr + (CyMSVR1 << index)),
3635                                 readb(base_addr + (CyMSVR2 << index)));
3636 #endif
3637                         spin_unlock_irqrestore(&card->card_lock, flags);
3638                 }
3639         } else {
3640                 base_addr = card->base_addr;
3641
3642                 firm_id = card->base_addr + ID_ADDRESS;
3643                 if (ISZLOADED(*card)) {
3644                         zfw_ctrl = card->base_addr +
3645                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3646                         board_ctrl = &zfw_ctrl->board_ctrl;
3647                         ch_ctrl = zfw_ctrl->ch_ctrl;
3648
3649                         if (set & TIOCM_RTS) {
3650                                 spin_lock_irqsave(&card->card_lock, flags);
3651                                 cy_writel(&ch_ctrl[channel].rs_control,
3652                                         readl(&ch_ctrl[channel].rs_control) |
3653                                         C_RS_RTS);
3654                                 spin_unlock_irqrestore(&card->card_lock, flags);
3655                         }
3656                         if (clear & TIOCM_RTS) {
3657                                 spin_lock_irqsave(&card->card_lock, flags);
3658                                 cy_writel(&ch_ctrl[channel].rs_control,
3659                                         readl(&ch_ctrl[channel].rs_control) &
3660                                         ~C_RS_RTS);
3661                                 spin_unlock_irqrestore(&card->card_lock, flags);
3662                         }
3663                         if (set & TIOCM_DTR) {
3664                                 spin_lock_irqsave(&card->card_lock, flags);
3665                                 cy_writel(&ch_ctrl[channel].rs_control,
3666                                         readl(&ch_ctrl[channel].rs_control) |
3667                                         C_RS_DTR);
3668 #ifdef CY_DEBUG_DTR
3669                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3670                                         "Z DTR\n");
3671 #endif
3672                                 spin_unlock_irqrestore(&card->card_lock, flags);
3673                         }
3674                         if (clear & TIOCM_DTR) {
3675                                 spin_lock_irqsave(&card->card_lock, flags);
3676                                 cy_writel(&ch_ctrl[channel].rs_control,
3677                                         readl(&ch_ctrl[channel].rs_control) &
3678                                         ~C_RS_DTR);
3679 #ifdef CY_DEBUG_DTR
3680                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3681                                         "Z DTR\n");
3682 #endif
3683                                 spin_unlock_irqrestore(&card->card_lock, flags);
3684                         }
3685                 } else {
3686                         return -ENODEV;
3687                 }
3688                 spin_lock_irqsave(&card->card_lock, flags);
3689                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3690                 if (retval != 0) {
3691                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3692                                 "was %x\n", info->line, retval);
3693                 }
3694                 spin_unlock_irqrestore(&card->card_lock, flags);
3695         }
3696         return 0;
3697 }                               /* cy_tiocmset */
3698
3699 /*
3700  * cy_break() --- routine which turns the break handling on or off
3701  */
3702 static int cy_break(struct tty_struct *tty, int break_state)
3703 {
3704         struct cyclades_port *info = tty->driver_data;
3705         struct cyclades_card *card;
3706         unsigned long flags;
3707         int retval = 0;
3708
3709         if (serial_paranoia_check(info, tty->name, "cy_break"))
3710                 return -EINVAL;
3711
3712         card = info->card;
3713
3714         spin_lock_irqsave(&card->card_lock, flags);
3715         if (!IS_CYC_Z(*card)) {
3716                 /* Let the transmit ISR take care of this (since it
3717                    requires stuffing characters into the output stream).
3718                  */
3719                 if (break_state == -1) {
3720                         if (!info->breakon) {
3721                                 info->breakon = 1;
3722                                 if (!info->xmit_cnt) {
3723                                         spin_unlock_irqrestore(&card->card_lock, flags);
3724                                         start_xmit(info);
3725                                         spin_lock_irqsave(&card->card_lock, flags);
3726                                 }
3727                         }
3728                 } else {
3729                         if (!info->breakoff) {
3730                                 info->breakoff = 1;
3731                                 if (!info->xmit_cnt) {
3732                                         spin_unlock_irqrestore(&card->card_lock, flags);
3733                                         start_xmit(info);
3734                                         spin_lock_irqsave(&card->card_lock, flags);
3735                                 }
3736                         }
3737                 }
3738         } else {
3739                 if (break_state == -1) {
3740                         retval = cyz_issue_cmd(card,
3741                                 info->line - card->first_line,
3742                                 C_CM_SET_BREAK, 0L);
3743                         if (retval != 0) {
3744                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3745                                         "ttyC%d was %x\n", info->line, retval);
3746                         }
3747                 } else {
3748                         retval = cyz_issue_cmd(card,
3749                                 info->line - card->first_line,
3750                                 C_CM_CLR_BREAK, 0L);
3751                         if (retval != 0) {
3752                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3753                                         "on ttyC%d was %x\n", info->line,
3754                                         retval);
3755                         }
3756                 }
3757         }
3758         spin_unlock_irqrestore(&card->card_lock, flags);
3759         return retval;
3760 }                               /* cy_break */
3761
3762 static int get_mon_info(struct cyclades_port *info,
3763                                 struct cyclades_monitor __user *mon)
3764 {
3765
3766         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3767                 return -EFAULT;
3768         info->mon.int_count = 0;
3769         info->mon.char_count = 0;
3770         info->mon.char_max = 0;
3771         info->mon.char_last = 0;
3772         return 0;
3773 }                               /* get_mon_info */
3774
3775 static int set_threshold(struct cyclades_port *info, unsigned long value)
3776 {
3777         struct cyclades_card *card;
3778         void __iomem *base_addr;
3779         int channel, chip, index;
3780         unsigned long flags;
3781
3782         card = info->card;
3783         channel = info->line - card->first_line;
3784         if (!IS_CYC_Z(*card)) {
3785                 chip = channel >> 2;
3786                 channel &= 0x03;
3787                 index = card->bus_index;
3788                 base_addr =
3789                     card->base_addr + (cy_chip_offset[chip] << index);
3790
3791                 info->cor3 &= ~CyREC_FIFO;
3792                 info->cor3 |= value & CyREC_FIFO;
3793
3794                 spin_lock_irqsave(&card->card_lock, flags);
3795                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3796                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3797                 spin_unlock_irqrestore(&card->card_lock, flags);
3798         }
3799         return 0;
3800 }                               /* set_threshold */
3801
3802 static int get_threshold(struct cyclades_port *info,
3803                                                 unsigned long __user *value)
3804 {
3805         struct cyclades_card *card;
3806         void __iomem *base_addr;
3807         int channel, chip, index;
3808         unsigned long tmp;
3809
3810         card = info->card;
3811         channel = info->line - card->first_line;
3812         if (!IS_CYC_Z(*card)) {
3813                 chip = channel >> 2;
3814                 channel &= 0x03;
3815                 index = card->bus_index;
3816                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3817
3818                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3819                 return put_user(tmp, value);
3820         }
3821         return 0;
3822 }                               /* get_threshold */
3823
3824 static int set_default_threshold(struct cyclades_port *info,
3825                                                         unsigned long value)
3826 {
3827         info->default_threshold = value & 0x0f;
3828         return 0;
3829 }                               /* set_default_threshold */
3830
3831 static int get_default_threshold(struct cyclades_port *info,
3832                                                 unsigned long __user *value)
3833 {
3834         return put_user(info->default_threshold, value);
3835 }                               /* get_default_threshold */
3836
3837 static int set_timeout(struct cyclades_port *info, unsigned long value)
3838 {
3839         struct cyclades_card *card;
3840         void __iomem *base_addr;
3841         int channel, chip, index;
3842         unsigned long flags;
3843
3844         card = info->card;
3845         channel = info->line - card->first_line;
3846         if (!IS_CYC_Z(*card)) {
3847                 chip = channel >> 2;
3848                 channel &= 0x03;
3849                 index = card->bus_index;
3850                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3851
3852                 spin_lock_irqsave(&card->card_lock, flags);
3853                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3854                 spin_unlock_irqrestore(&card->card_lock, flags);
3855         }
3856         return 0;
3857 }                               /* set_timeout */
3858
3859 static int get_timeout(struct cyclades_port *info,
3860                                                 unsigned long __user *value)
3861 {
3862         struct cyclades_card *card;
3863         void __iomem *base_addr;
3864         int channel, chip, index;
3865         unsigned long tmp;
3866
3867         card = info->card;
3868         channel = info->line - card->first_line;
3869         if (!IS_CYC_Z(*card)) {
3870                 chip = channel >> 2;
3871                 channel &= 0x03;
3872                 index = card->bus_index;
3873                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3874
3875                 tmp = readb(base_addr + (CyRTPR << index));
3876                 return put_user(tmp, value);
3877         }
3878         return 0;
3879 }                               /* get_timeout */
3880
3881 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3882 {
3883         info->default_timeout = value & 0xff;
3884         return 0;
3885 }                               /* set_default_timeout */
3886
3887 static int get_default_timeout(struct cyclades_port *info,
3888                                         unsigned long __user *value)
3889 {
3890         return put_user(info->default_timeout, value);
3891 }                               /* get_default_timeout */
3892
3893 /*
3894  * This routine allows the tty driver to implement device-
3895  * specific ioctl's.  If the ioctl number passed in cmd is
3896  * not recognized by the driver, it should return ENOIOCTLCMD.
3897  */
3898 static int
3899 cy_ioctl(struct tty_struct *tty, struct file *file,
3900          unsigned int cmd, unsigned long arg)
3901 {
3902         struct cyclades_port *info = tty->driver_data;
3903         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3904         struct serial_icounter_struct __user *p_cuser;  /* user space */
3905         int ret_val = 0;
3906         unsigned long flags;
3907         void __user *argp = (void __user *)arg;
3908
3909         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3910                 return -ENODEV;
3911
3912 #ifdef CY_DEBUG_OTHER
3913         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3914                 info->line, cmd, arg);
3915 #endif
3916         lock_kernel();
3917
3918         switch (cmd) {
3919         case CYGETMON:
3920                 ret_val = get_mon_info(info, argp);
3921                 break;
3922         case CYGETTHRESH:
3923                 ret_val = get_threshold(info, argp);
3924                 break;
3925         case CYSETTHRESH:
3926                 ret_val = set_threshold(info, arg);
3927                 break;
3928         case CYGETDEFTHRESH:
3929                 ret_val = get_default_threshold(info, argp);
3930                 break;
3931         case CYSETDEFTHRESH:
3932                 ret_val = set_default_threshold(info, arg);
3933                 break;
3934         case CYGETTIMEOUT:
3935                 ret_val = get_timeout(info, argp);
3936                 break;
3937         case CYSETTIMEOUT:
3938                 ret_val = set_timeout(info, arg);
3939                 break;
3940         case CYGETDEFTIMEOUT:
3941                 ret_val = get_default_timeout(info, argp);
3942                 break;
3943         case CYSETDEFTIMEOUT:
3944                 ret_val = set_default_timeout(info, arg);
3945                 break;
3946         case CYSETRFLOW:
3947                 info->rflow = (int)arg;
3948                 ret_val = 0;
3949                 break;
3950         case CYGETRFLOW:
3951                 ret_val = info->rflow;
3952                 break;
3953         case CYSETRTSDTR_INV:
3954                 info->rtsdtr_inv = (int)arg;
3955                 ret_val = 0;
3956                 break;
3957         case CYGETRTSDTR_INV:
3958                 ret_val = info->rtsdtr_inv;
3959                 break;
3960         case CYGETCD1400VER:
3961                 ret_val = info->chip_rev;
3962                 break;
3963 #ifndef CONFIG_CYZ_INTR
3964         case CYZSETPOLLCYCLE:
3965                 cyz_polling_cycle = (arg * HZ) / 1000;
3966                 ret_val = 0;
3967                 break;
3968         case CYZGETPOLLCYCLE:
3969                 ret_val = (cyz_polling_cycle * 1000) / HZ;
3970                 break;
3971 #endif                          /* CONFIG_CYZ_INTR */
3972         case CYSETWAIT:
3973                 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3974                 ret_val = 0;
3975                 break;
3976         case CYGETWAIT:
3977                 ret_val = info->port.closing_wait / (HZ / 100);
3978                 break;
3979         case TIOCGSERIAL:
3980                 ret_val = get_serial_info(info, argp);
3981                 break;
3982         case TIOCSSERIAL:
3983                 ret_val = set_serial_info(info, argp);
3984                 break;
3985         case TIOCSERGETLSR:     /* Get line status register */
3986                 ret_val = get_lsr_info(info, argp);
3987                 break;
3988                 /*
3989                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3990                  * - mask passed in arg for lines of interest
3991                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3992                  * Caller should use TIOCGICOUNT to see which one it was
3993                  */
3994         case TIOCMIWAIT:
3995                 spin_lock_irqsave(&info->card->card_lock, flags);
3996                 /* note the counters on entry */
3997                 cnow = info->icount;
3998                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3999                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4000                         cprev = cnow;
4001                         spin_lock_irqsave(&info->card->card_lock, flags);
4002                         cnow = info->icount;    /* atomic copy */
4003                         spin_unlock_irqrestore(&info->card->card_lock, flags);
4004
4005                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4006                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4007                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
4008                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4009                 }));
4010                 break;
4011
4012                 /*
4013                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4014                  * Return: write counters to the user passed counter struct
4015                  * NB: both 1->0 and 0->1 transitions are counted except for
4016                  *     RI where only 0->1 is counted.
4017                  */
4018         case TIOCGICOUNT:
4019                 spin_lock_irqsave(&info->card->card_lock, flags);
4020                 cnow = info->icount;
4021                 spin_unlock_irqrestore(&info->card->card_lock, flags);
4022                 p_cuser = argp;
4023                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4024                 if (ret_val)
4025                         break;
4026                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4027                 if (ret_val)
4028                         break;
4029                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4030                 if (ret_val)
4031                         break;
4032                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4033                 if (ret_val)
4034                         break;
4035                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4036                 if (ret_val)
4037                         break;
4038                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4039                 if (ret_val)
4040                         break;
4041                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4042                 if (ret_val)
4043                         break;
4044                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4045                 if (ret_val)
4046                         break;
4047                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4048                 if (ret_val)
4049                         break;
4050                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4051                 if (ret_val)
4052                         break;
4053                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4054                 if (ret_val)
4055                         break;
4056                 ret_val = 0;
4057                 break;
4058         default:
4059                 ret_val = -ENOIOCTLCMD;
4060         }
4061         unlock_kernel();
4062
4063 #ifdef CY_DEBUG_OTHER
4064         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4065 #endif
4066         return ret_val;
4067 }                               /* cy_ioctl */
4068
4069 /*
4070  * This routine allows the tty driver to be notified when
4071  * device's termios settings have changed.  Note that a
4072  * well-designed tty driver should be prepared to accept the case
4073  * where old == NULL, and try to do something rational.
4074  */
4075 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4076 {
4077         struct cyclades_port *info = tty->driver_data;
4078
4079 #ifdef CY_DEBUG_OTHER
4080         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4081 #endif
4082
4083         set_line_char(info);
4084
4085         if ((old_termios->c_cflag & CRTSCTS) &&
4086                         !(tty->termios->c_cflag & CRTSCTS)) {
4087                 tty->hw_stopped = 0;
4088                 cy_start(tty);
4089         }
4090 #if 0
4091         /*
4092          * No need to wake up processes in open wait, since they
4093          * sample the CLOCAL flag once, and don't recheck it.
4094          * XXX  It's not clear whether the current behavior is correct
4095          * or not.  Hence, this may change.....
4096          */
4097         if (!(old_termios->c_cflag & CLOCAL) &&
4098             (tty->termios->c_cflag & CLOCAL))
4099                 wake_up_interruptible(&info->port.open_wait);
4100 #endif
4101 }                               /* cy_set_termios */
4102
4103 /* This function is used to send a high-priority XON/XOFF character to
4104    the device.
4105 */
4106 static void cy_send_xchar(struct tty_struct *tty, char ch)
4107 {
4108         struct cyclades_port *info = tty->driver_data;
4109         struct cyclades_card *card;
4110         int channel;
4111
4112         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4113                 return;
4114
4115         info->x_char = ch;
4116
4117         if (ch)
4118                 cy_start(tty);
4119
4120         card = info->card;
4121         channel = info->line - card->first_line;
4122
4123         if (IS_CYC_Z(*card)) {
4124                 if (ch == STOP_CHAR(tty))
4125                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4126                 else if (ch == START_CHAR(tty))
4127                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4128         }
4129 }
4130
4131 /* This routine is called by the upper-layer tty layer to signal
4132    that incoming characters should be throttled because the input
4133    buffers are close to full.
4134  */
4135 static void cy_throttle(struct tty_struct *tty)
4136 {
4137         struct cyclades_port *info = tty->driver_data;
4138         struct cyclades_card *card;
4139         unsigned long flags;
4140         void __iomem *base_addr;
4141         int chip, channel, index;
4142
4143 #ifdef CY_DEBUG_THROTTLE
4144         char buf[64];
4145
4146         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4147                         tty->ldisc.chars_in_buffer(tty), info->line);
4148 #endif
4149
4150         if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4151                 return;
4152
4153         card = info->card;
4154
4155         if (I_IXOFF(tty)) {
4156                 if (!IS_CYC_Z(*card))
4157                         cy_send_xchar(tty, STOP_CHAR(tty));
4158                 else
4159                         info->throttle = 1;
4160         }
4161
4162         if (tty->termios->c_cflag & CRTSCTS) {
4163                 channel = info->line - card->first_line;
4164                 if (!IS_CYC_Z(*card)) {
4165                         chip = channel >> 2;
4166                         channel &= 0x03;
4167                         index = card->bus_index;
4168                         base_addr = card->base_addr +
4169                                 (cy_chip_offset[chip] << index);
4170
4171                         spin_lock_irqsave(&card->card_lock, flags);
4172                         cy_writeb(base_addr + (CyCAR << index),
4173                                   (u_char) channel);
4174                         if (info->rtsdtr_inv) {
4175                                 cy_writeb(base_addr + (CyMSVR2 << index),
4176                                           ~CyDTR);
4177                         } else {
4178                                 cy_writeb(base_addr + (CyMSVR1 << index),
4179                                           ~CyRTS);
4180                         }
4181                         spin_unlock_irqrestore(&card->card_lock, flags);
4182                 } else {
4183                         info->throttle = 1;
4184                 }
4185         }
4186 }                               /* cy_throttle */
4187
4188 /*
4189  * This routine notifies the tty driver that it should signal
4190  * that characters can now be sent to the tty without fear of
4191  * overrunning the input buffers of the line disciplines.
4192  */
4193 static void cy_unthrottle(struct tty_struct *tty)
4194 {
4195         struct cyclades_port *info = tty->driver_data;
4196         struct cyclades_card *card;
4197         unsigned long flags;
4198         void __iomem *base_addr;
4199         int chip, channel, index;
4200
4201 #ifdef CY_DEBUG_THROTTLE
4202         char buf[64];
4203
4204         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4205                 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4206 #endif
4207
4208         if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4209                 return;
4210
4211         if (I_IXOFF(tty)) {
4212                 if (info->x_char)
4213                         info->x_char = 0;
4214                 else
4215                         cy_send_xchar(tty, START_CHAR(tty));
4216         }
4217
4218         if (tty->termios->c_cflag & CRTSCTS) {
4219                 card = info->card;
4220                 channel = info->line - card->first_line;
4221                 if (!IS_CYC_Z(*card)) {
4222                         chip = channel >> 2;
4223                         channel &= 0x03;
4224                         index = card->bus_index;
4225                         base_addr = card->base_addr +
4226                                 (cy_chip_offset[chip] << index);
4227
4228                         spin_lock_irqsave(&card->card_lock, flags);
4229                         cy_writeb(base_addr + (CyCAR << index),
4230                                   (u_char) channel);
4231                         if (info->rtsdtr_inv) {
4232                                 cy_writeb(base_addr + (CyMSVR2 << index),
4233                                           CyDTR);
4234                         } else {
4235                                 cy_writeb(base_addr + (CyMSVR1 << index),
4236                                           CyRTS);
4237                         }
4238                         spin_unlock_irqrestore(&card->card_lock, flags);
4239                 } else {
4240                         info->throttle = 0;
4241                 }
4242         }
4243 }                               /* cy_unthrottle */
4244
4245 /* cy_start and cy_stop provide software output flow control as a
4246    function of XON/XOFF, software CTS, and other such stuff.
4247 */
4248 static void cy_stop(struct tty_struct *tty)
4249 {
4250         struct cyclades_card *cinfo;
4251         struct cyclades_port *info = tty->driver_data;
4252         void __iomem *base_addr;
4253         int chip, channel, index;
4254         unsigned long flags;
4255
4256 #ifdef CY_DEBUG_OTHER
4257         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4258 #endif
4259
4260         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4261                 return;
4262
4263         cinfo = info->card;
4264         channel = info->line - cinfo->first_line;
4265         if (!IS_CYC_Z(*cinfo)) {
4266                 index = cinfo->bus_index;
4267                 chip = channel >> 2;
4268                 channel &= 0x03;
4269                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4270
4271                 spin_lock_irqsave(&cinfo->card_lock, flags);
4272                 cy_writeb(base_addr + (CyCAR << index),
4273                         (u_char)(channel & 0x0003)); /* index channel */
4274                 cy_writeb(base_addr + (CySRER << index),
4275                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4276                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4277         }
4278 }                               /* cy_stop */
4279
4280 static void cy_start(struct tty_struct *tty)
4281 {
4282         struct cyclades_card *cinfo;
4283         struct cyclades_port *info = tty->driver_data;
4284         void __iomem *base_addr;
4285         int chip, channel, index;
4286         unsigned long flags;
4287
4288 #ifdef CY_DEBUG_OTHER
4289         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4290 #endif
4291
4292         if (serial_paranoia_check(info, tty->name, "cy_start"))
4293                 return;
4294
4295         cinfo = info->card;
4296         channel = info->line - cinfo->first_line;
4297         index = cinfo->bus_index;
4298         if (!IS_CYC_Z(*cinfo)) {
4299                 chip = channel >> 2;
4300                 channel &= 0x03;
4301                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4302
4303                 spin_lock_irqsave(&cinfo->card_lock, flags);
4304                 cy_writeb(base_addr + (CyCAR << index),
4305                         (u_char) (channel & 0x0003));   /* index channel */
4306                 cy_writeb(base_addr + (CySRER << index),
4307                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4308                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4309         }
4310 }                               /* cy_start */
4311
4312 /*
4313  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4314  */
4315 static void cy_hangup(struct tty_struct *tty)
4316 {
4317         struct cyclades_port *info = tty->driver_data;
4318
4319 #ifdef CY_DEBUG_OTHER
4320         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4321 #endif
4322
4323         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4324                 return;
4325
4326         cy_flush_buffer(tty);
4327         shutdown(info);
4328         info->port.count = 0;
4329 #ifdef CY_DEBUG_COUNT
4330         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4331                 current->pid);
4332 #endif
4333         info->port.tty = NULL;
4334         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4335         wake_up_interruptible(&info->port.open_wait);
4336 }                               /* cy_hangup */
4337
4338 /*
4339  * ---------------------------------------------------------------------
4340  * cy_init() and friends
4341  *
4342  * cy_init() is called at boot-time to initialize the serial driver.
4343  * ---------------------------------------------------------------------
4344  */
4345
4346 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4347 {
4348         struct cyclades_port *info;
4349         u32 uninitialized_var(mailbox);
4350         unsigned int nports, port;
4351         unsigned short chip_number;
4352         int uninitialized_var(index);
4353
4354         spin_lock_init(&cinfo->card_lock);
4355
4356         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4357                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4358                                      cinfo->ctl_addr)->mail_box_0);
4359                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4360                 cinfo->intr_enabled = 0;
4361                 cinfo->nports = 0;      /* Will be correctly set later, after
4362                                            Z FW is loaded */
4363         } else {
4364                 index = cinfo->bus_index;
4365                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4366         }
4367
4368         cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4369         if (cinfo->ports == NULL) {
4370                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4371                 cinfo->nports = 0;
4372                 return -ENOMEM;
4373         }
4374
4375         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4376                         port++) {
4377                 info = &cinfo->ports[port - cinfo->first_line];
4378                 tty_port_init(&info->port);
4379                 info->magic = CYCLADES_MAGIC;
4380                 info->card = cinfo;
4381                 info->line = port;
4382
4383                 info->port.closing_wait = CLOSING_WAIT_DELAY;
4384                 info->port.close_delay = 5 * HZ / 10;
4385                 info->port.flags = STD_COM_FLAGS;
4386                 init_completion(&info->shutdown_wait);
4387                 init_waitqueue_head(&info->delta_msr_wait);
4388
4389                 if (IS_CYC_Z(*cinfo)) {
4390                         info->type = PORT_STARTECH;
4391                         if (mailbox == ZO_V1)
4392                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4393                         else
4394                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4395 #ifdef CONFIG_CYZ_INTR
4396                         setup_timer(&cyz_rx_full_timer[port],
4397                                 cyz_rx_restart, (unsigned long)info);
4398 #endif
4399                 } else {
4400                         info->type = PORT_CIRRUS;
4401                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4402                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4403                         info->cor2 = CyETC;
4404                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4405
4406                         chip_number = (port - cinfo->first_line) / 4;
4407                         info->chip_rev = readb(cinfo->base_addr +
4408                                       (cy_chip_offset[chip_number] << index) +
4409                                       (CyGFRCR << index));
4410
4411                         if (info->chip_rev >= CD1400_REV_J) {
4412                                 /* It is a CD1400 rev. J or later */
4413                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4414                                 info->tco = baud_co_60[13];     /* Tx CO */
4415                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4416                                 info->rco = baud_co_60[13];     /* Rx CO */
4417                                 info->rtsdtr_inv = 1;
4418                         } else {
4419                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4420                                 info->tco = baud_co_25[13];     /* Tx CO */
4421                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4422                                 info->rco = baud_co_25[13];     /* Rx CO */
4423                                 info->rtsdtr_inv = 0;
4424                         }
4425                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4426                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4427                 }
4428
4429         }
4430
4431 #ifndef CONFIG_CYZ_INTR
4432         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4433                 mod_timer(&cyz_timerlist, jiffies + 1);
4434 #ifdef CY_PCI_DEBUG
4435                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4436 #endif
4437         }
4438 #endif
4439         return 0;
4440 }
4441
4442 /* initialize chips on Cyclom-Y card -- return number of valid
4443    chips (which is number of ports/4) */
4444 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4445                 int index)
4446 {
4447         unsigned int chip_number;
4448         void __iomem *base_addr;
4449
4450         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4451         /* Cy_HwReset is 0x1400 */
4452         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4453         /* Cy_ClrIntr is 0x1800 */
4454         udelay(500L);
4455
4456         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4457                                                         chip_number++) {
4458                 base_addr =
4459                     true_base_addr + (cy_chip_offset[chip_number] << index);
4460                 mdelay(1);
4461                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4462                         /*************
4463                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4464                         chip_number, (unsigned long)base_addr);
4465                         *************/
4466                         return chip_number;
4467                 }
4468
4469                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4470                 udelay(10L);
4471
4472                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4473                    cannot distinguish between references to chip 0 and a non-
4474                    existent chip 4.  If the preceding clearing of the supposed
4475                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4476                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4477                  */
4478                 if (chip_number == 4 && readb(true_base_addr +
4479                                 (cy_chip_offset[0] << index) +
4480                                 (CyGFRCR << index)) == 0) {
4481                         return chip_number;
4482                 }
4483
4484                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4485                 mdelay(1);
4486
4487                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4488                         /*
4489                            printk(" chip #%d at %#6lx is not responding ",
4490                            chip_number, (unsigned long)base_addr);
4491                            printk("(GFRCR stayed 0)\n",
4492                          */
4493                         return chip_number;
4494                 }
4495                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4496                                 0x40) {
4497                         /*
4498                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4499                                         "%#2x)\n",
4500                                         chip_number, (unsigned long)base_addr,
4501                                         base_addr[CyGFRCR<<index]);
4502                          */
4503                         return chip_number;
4504                 }
4505                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4506                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4507                         /* It is a CD1400 rev. J or later */
4508                         /* Impossible to reach 5ms with this chip.
4509                            Changed to 2ms instead (f = 500 Hz). */
4510                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4511                 } else {
4512                         /* f = 200 Hz */
4513                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4514                 }
4515
4516                 /*
4517                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4518                    chip_number, (unsigned long)base_addr,
4519                    readb(base_addr+(CyGFRCR<<index)));
4520                  */
4521         }
4522         return chip_number;
4523 }                               /* cyy_init_card */
4524
4525 /*
4526  * ---------------------------------------------------------------------
4527  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4528  * sets global variables and return the number of ISA boards found.
4529  * ---------------------------------------------------------------------
4530  */
4531 static int __init cy_detect_isa(void)
4532 {
4533 #ifdef CONFIG_ISA
4534         unsigned short cy_isa_irq, nboard;
4535         void __iomem *cy_isa_address;
4536         unsigned short i, j, cy_isa_nchan;
4537 #ifdef MODULE
4538         int isparam = 0;
4539 #endif
4540
4541         nboard = 0;
4542
4543 #ifdef MODULE
4544         /* Check for module parameters */
4545         for (i = 0; i < NR_CARDS; i++) {
4546                 if (maddr[i] || i) {
4547                         isparam = 1;
4548                         cy_isa_addresses[i] = maddr[i];
4549                 }
4550                 if (!maddr[i])
4551                         break;
4552         }
4553 #endif
4554
4555         /* scan the address table probing for Cyclom-Y/ISA boards */
4556         for (i = 0; i < NR_ISA_ADDRS; i++) {
4557                 unsigned int isa_address = cy_isa_addresses[i];
4558                 if (isa_address == 0x0000)
4559                         return nboard;
4560
4561                 /* probe for CD1400... */
4562                 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4563                 if (cy_isa_address == NULL) {
4564                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4565                                         "address\n");
4566                         continue;
4567                 }
4568                 cy_isa_nchan = CyPORTS_PER_CHIP *
4569                         cyy_init_card(cy_isa_address, 0);
4570                 if (cy_isa_nchan == 0) {
4571                         iounmap(cy_isa_address);
4572                         continue;
4573                 }
4574 #ifdef MODULE
4575                 if (isparam && irq[i])
4576                         cy_isa_irq = irq[i];
4577                 else
4578 #endif
4579                         /* find out the board's irq by probing */
4580                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4581                 if (cy_isa_irq == 0) {
4582                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4583                                 "IRQ could not be detected.\n",
4584                                 (unsigned long)cy_isa_address);
4585                         iounmap(cy_isa_address);
4586                         continue;
4587                 }
4588
4589                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4590                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4591                                 "more channels are available. Change NR_PORTS "
4592                                 "in cyclades.c and recompile kernel.\n",
4593                                 (unsigned long)cy_isa_address);
4594                         iounmap(cy_isa_address);
4595                         return nboard;
4596                 }
4597                 /* fill the next cy_card structure available */
4598                 for (j = 0; j < NR_CARDS; j++) {
4599                         if (cy_card[j].base_addr == NULL)
4600                                 break;
4601                 }
4602                 if (j == NR_CARDS) {    /* no more cy_cards available */
4603                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4604                                 "more cards can be used. Change NR_CARDS in "
4605                                 "cyclades.c and recompile kernel.\n",
4606                                 (unsigned long)cy_isa_address);
4607                         iounmap(cy_isa_address);
4608                         return nboard;
4609                 }
4610
4611                 /* allocate IRQ */
4612                 if (request_irq(cy_isa_irq, cyy_interrupt,
4613                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4614                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4615                                 "could not allocate IRQ#%d.\n",
4616                                 (unsigned long)cy_isa_address, cy_isa_irq);
4617                         iounmap(cy_isa_address);
4618                         return nboard;
4619                 }
4620
4621                 /* set cy_card */
4622                 cy_card[j].base_addr = cy_isa_address;
4623                 cy_card[j].ctl_addr = NULL;
4624                 cy_card[j].irq = (int)cy_isa_irq;
4625                 cy_card[j].bus_index = 0;
4626                 cy_card[j].first_line = cy_next_channel;
4627                 cy_card[j].num_chips = cy_isa_nchan / 4;
4628                 if (cy_init_card(&cy_card[j])) {
4629                         cy_card[j].base_addr = NULL;
4630                         free_irq(cy_isa_irq, &cy_card[j]);
4631                         iounmap(cy_isa_address);
4632                         continue;
4633                 }
4634                 nboard++;
4635
4636                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4637                         "%d channels starting from port %d\n",
4638                         j + 1, (unsigned long)cy_isa_address,
4639                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4640                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4641
4642                 for (j = cy_next_channel;
4643                                 j < cy_next_channel + cy_isa_nchan; j++)
4644                         tty_register_device(cy_serial_driver, j, NULL);
4645                 cy_next_channel += cy_isa_nchan;
4646         }
4647         return nboard;
4648 #else
4649         return 0;
4650 #endif                          /* CONFIG_ISA */
4651 }                               /* cy_detect_isa */
4652
4653 #ifdef CONFIG_PCI
4654 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4655 {
4656         unsigned int a;
4657
4658         for (a = 0; a < size && *str; a++, str++)
4659                 if (*str & 0x80)
4660                         return -EINVAL;
4661
4662         for (; a < size; a++, str++)
4663                 if (*str)
4664                         return -EINVAL;
4665
4666         return 0;
4667 }
4668
4669 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4670                 unsigned int size)
4671 {
4672         for (; size > 0; size--) {
4673                 cy_writel(fpga, *data++);
4674                 udelay(10);
4675         }
4676 }
4677
4678 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4679                 struct RUNTIME_9060 __iomem *addr)
4680 {
4681         /* Reset PLX */
4682         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4683         udelay(100L);
4684         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4685
4686         /* Reload Config. Registers from EEPROM */
4687         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4688         udelay(100L);
4689         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4690
4691         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4692          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4693          * registers. This will remain here until we find a permanent fix.
4694          */
4695         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4696 }
4697
4698 static int __devinit __cyz_load_fw(const struct firmware *fw,
4699                 const char *name, const u32 mailbox, void __iomem *base,
4700                 void __iomem *fpga)
4701 {
4702         const void *ptr = fw->data;
4703         const struct zfile_header *h = ptr;
4704         const struct zfile_config *c, *cs;
4705         const struct zfile_block *b, *bs;
4706         unsigned int a, tmp, len = fw->size;
4707 #define BAD_FW KERN_ERR "Bad firmware: "
4708         if (len < sizeof(*h)) {
4709                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4710                 return -EINVAL;
4711         }
4712
4713         cs = ptr + h->config_offset;
4714         bs = ptr + h->block_offset;
4715
4716         if ((void *)(cs + h->n_config) > ptr + len ||
4717                         (void *)(bs + h->n_blocks) > ptr + len) {
4718                 printk(BAD_FW "too short");
4719                 return  -EINVAL;
4720         }
4721
4722         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4723                         cyc_isfwstr(h->date, sizeof(h->date))) {
4724                 printk(BAD_FW "bad formatted header string\n");
4725                 return -EINVAL;
4726         }
4727
4728         if (strncmp(name, h->name, sizeof(h->name))) {
4729                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4730                 return -EINVAL;
4731         }
4732
4733         tmp = 0;
4734         for (c = cs; c < cs + h->n_config; c++) {
4735                 for (a = 0; a < c->n_blocks; a++)
4736                         if (c->block_list[a] > h->n_blocks) {
4737                                 printk(BAD_FW "bad block ref number in cfgs\n");
4738                                 return -EINVAL;
4739                         }
4740                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4741                         tmp++;
4742         }
4743         if (!tmp) {
4744                 printk(BAD_FW "nothing appropriate\n");
4745                 return -EINVAL;
4746         }
4747
4748         for (b = bs; b < bs + h->n_blocks; b++)
4749                 if (b->file_offset + b->size > len) {
4750                         printk(BAD_FW "bad block data offset\n");
4751                         return -EINVAL;
4752                 }
4753
4754         /* everything is OK, let's seek'n'load it */
4755         for (c = cs; c < cs + h->n_config; c++)
4756                 if (c->mailbox == mailbox && c->function == 0)
4757                         break;
4758
4759         for (a = 0; a < c->n_blocks; a++) {
4760                 b = &bs[c->block_list[a]];
4761                 if (b->type == ZBLOCK_FPGA) {
4762                         if (fpga != NULL)
4763                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4764                                                 b->size);
4765                 } else {
4766                         if (base != NULL)
4767                                 memcpy_toio(base + b->ram_offset,
4768                                                ptr + b->file_offset, b->size);
4769                 }
4770         }
4771 #undef BAD_FW
4772         return 0;
4773 }
4774
4775 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4776                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4777 {
4778         const struct firmware *fw;
4779         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4780         struct CUSTOM_REG __iomem *cust = base_addr;
4781         struct ZFW_CTRL __iomem *pt_zfwctrl;
4782         void __iomem *tmp;
4783         u32 mailbox, status;
4784         unsigned int i;
4785         int retval;
4786
4787         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4788         if (retval) {
4789                 dev_err(&pdev->dev, "can't get firmware\n");
4790                 goto err;
4791         }
4792
4793         /* Check whether the firmware is already loaded and running. If
4794            positive, skip this board */
4795         if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4796                 u32 cntval = readl(base_addr + 0x190);
4797
4798                 udelay(100);
4799                 if (cntval != readl(base_addr + 0x190)) {
4800                         /* FW counter is working, FW is running */
4801                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4802                                         "Skipping board.\n");
4803                         retval = 0;
4804                         goto err_rel;
4805                 }
4806         }
4807
4808         /* start boot */
4809         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4810                         ~0x00030800UL);
4811
4812         mailbox = readl(&ctl_addr->mail_box_0);
4813
4814         if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4815                 /* stops CPU and set window to beginning of RAM */
4816                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4817                 cy_writel(&cust->cpu_stop, 0);
4818                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4819                 udelay(100);
4820         }
4821
4822         plx_init(pdev, irq, ctl_addr);
4823
4824         if (mailbox != 0) {
4825                 /* load FPGA */
4826                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4827                                 base_addr);
4828                 if (retval)
4829                         goto err_rel;
4830                 if (!Z_FPGA_LOADED(ctl_addr)) {
4831                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4832                                         "not loaded\n");
4833                         goto err_rel;
4834                 }
4835         }
4836
4837         /* stops CPU and set window to beginning of RAM */
4838         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4839         cy_writel(&cust->cpu_stop, 0);
4840         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4841         udelay(100);
4842
4843         /* clear memory */
4844         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4845                 cy_writeb(tmp, 255);
4846         if (mailbox != 0) {
4847                 /* set window to last 512K of RAM */
4848                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4849                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4850                         cy_writeb(tmp, 255);
4851                 /* set window to beginning of RAM */
4852                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4853         }
4854
4855         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4856         release_firmware(fw);
4857         if (retval)
4858                 goto err;
4859
4860         /* finish boot and start boards */
4861         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4862         cy_writel(&cust->cpu_start, 0);
4863         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4864         i = 0;
4865         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4866                 msleep(100);
4867         if (status != ZFIRM_ID) {
4868                 if (status == ZFIRM_HLT) {
4869                         dev_err(&pdev->dev, "you need an external power supply "
4870                                 "for this number of ports. Firmware halted and "
4871                                 "board reset.\n");
4872                         retval = -EIO;
4873                         goto err;
4874                 }
4875                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4876                                 "some more time\n", status);
4877                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4878                                 i++ < 200)
4879                         msleep(100);
4880                 if (status != ZFIRM_ID) {
4881                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
4882                                         "Giving up. (fid->signature = 0x%x)\n",
4883                                         status);
4884                         dev_info(&pdev->dev, "*** Warning ***: if you are "
4885                                 "upgrading the FW, please power cycle the "
4886                                 "system before loading the new FW to the "
4887                                 "Cyclades-Z.\n");
4888
4889                         if (Z_FPGA_LOADED(ctl_addr))
4890                                 plx_init(pdev, irq, ctl_addr);
4891
4892                         retval = -EIO;
4893                         goto err;
4894                 }
4895                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4896                                 i / 10);
4897         }
4898         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4899
4900         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4901                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4902                         base_addr + readl(&fid->zfwctrl_addr));
4903
4904         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4905                 readl(&pt_zfwctrl->board_ctrl.fw_version),
4906                 readl(&pt_zfwctrl->board_ctrl.n_channel));
4907
4908         if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4909                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4910                         "check the connection between the Z host card and the "
4911                         "serial expanders.\n");
4912
4913                 if (Z_FPGA_LOADED(ctl_addr))
4914                         plx_init(pdev, irq, ctl_addr);
4915
4916                 dev_info(&pdev->dev, "Null number of ports detected. Board "
4917                                 "reset.\n");
4918                 retval = 0;
4919                 goto err;
4920         }
4921
4922         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4923         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4924
4925         /*
4926            Early firmware failed to start looking for commands.
4927            This enables firmware interrupts for those commands.
4928          */
4929         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4930                         (1 << 17));
4931         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4932                         0x00030800UL);
4933
4934         plx_init(pdev, irq, ctl_addr);
4935
4936         return 0;
4937 err_rel:
4938         release_firmware(fw);
4939 err:
4940         return retval;
4941 }
4942
4943 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4944                 const struct pci_device_id *ent)
4945 {
4946         void __iomem *addr0 = NULL, *addr2 = NULL;
4947         char *card_name = NULL;
4948         u32 mailbox;
4949         unsigned int device_id, nchan = 0, card_no, i;
4950         unsigned char plx_ver;
4951         int retval, irq;
4952
4953         retval = pci_enable_device(pdev);
4954         if (retval) {
4955                 dev_err(&pdev->dev, "cannot enable device\n");
4956                 goto err;
4957         }
4958
4959         /* read PCI configuration area */
4960         irq = pdev->irq;
4961         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4962
4963 #if defined(__alpha__)
4964         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4965                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4966                         "addresses on Alpha systems.\n");
4967                 retval = -EIO;
4968                 goto err_dis;
4969         }
4970 #endif
4971         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4972                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4973                         "addresses\n");
4974                 retval = -EIO;
4975                 goto err_dis;
4976         }
4977
4978         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4979                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4980                                 "it...\n");
4981                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4982         }
4983
4984         retval = pci_request_regions(pdev, "cyclades");
4985         if (retval) {
4986                 dev_err(&pdev->dev, "failed to reserve resources\n");
4987                 goto err_dis;
4988         }
4989
4990         retval = -EIO;
4991         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4992                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4993                 card_name = "Cyclom-Y";
4994
4995                 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4996                                 CyPCI_Yctl);
4997                 if (addr0 == NULL) {
4998                         dev_err(&pdev->dev, "can't remap ctl region\n");
4999                         goto err_reg;
5000                 }
5001                 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
5002                                 CyPCI_Ywin);
5003                 if (addr2 == NULL) {
5004                         dev_err(&pdev->dev, "can't remap base region\n");
5005                         goto err_unmap;
5006                 }
5007
5008                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5009                 if (nchan == 0) {
5010                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5011                                         "Serial-Modules\n");
5012                         goto err_unmap;
5013                 }
5014         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5015                 struct RUNTIME_9060 __iomem *ctl_addr;
5016
5017                 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
5018                                 CyPCI_Zctl);
5019                 if (addr0 == NULL) {
5020                         dev_err(&pdev->dev, "can't remap ctl region\n");
5021                         goto err_reg;
5022                 }
5023
5024                 /* Disable interrupts on the PLX before resetting it */
5025                 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5026
5027                 plx_init(pdev, irq, addr0);
5028
5029                 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5030
5031                 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
5032                                 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
5033                 if (addr2 == NULL) {
5034                         dev_err(&pdev->dev, "can't remap base region\n");
5035                         goto err_unmap;
5036                 }
5037
5038                 if (mailbox == ZE_V1) {
5039                         card_name = "Cyclades-Ze";
5040
5041                         readl(&ctl_addr->mail_box_0);
5042                         nchan = ZE_V1_NPORTS;
5043                 } else {
5044                         card_name = "Cyclades-8Zo";
5045
5046 #ifdef CY_PCI_DEBUG
5047                         if (mailbox == ZO_V1) {
5048                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5049                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5050                                         "id %lx, ver %lx\n", (ulong)(0xff &
5051                                         readl(&((struct CUSTOM_REG *)addr2)->
5052                                                 fpga_id)), (ulong)(0xff &
5053                                         readl(&((struct CUSTOM_REG *)addr2)->
5054                                                 fpga_version)));
5055                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5056                         } else {
5057                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5058                                         "Cyclades-Z board.  FPGA not loaded\n");
5059                         }
5060 #endif
5061                         /* The following clears the firmware id word.  This
5062                            ensures that the driver will not attempt to talk to
5063                            the board until it has been properly initialized.
5064                          */
5065                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5066                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5067
5068                         retval = cyz_load_fw(pdev, addr2, addr0, irq);
5069                         if (retval)
5070                                 goto err_unmap;
5071                         /* This must be a Cyclades-8Zo/PCI.  The extendable
5072                            version will have a different device_id and will
5073                            be allocated its maximum number of ports. */
5074                         nchan = 8;
5075                 }
5076         }
5077
5078         if ((cy_next_channel + nchan) > NR_PORTS) {
5079                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5080                         "channels are available. Change NR_PORTS in "
5081                         "cyclades.c and recompile kernel.\n");
5082                 goto err_unmap;
5083         }
5084         /* fill the next cy_card structure available */
5085         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5086                 if (cy_card[card_no].base_addr == NULL)
5087                         break;
5088         }
5089         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5090                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5091                         "more cards can be used. Change NR_CARDS in "
5092                         "cyclades.c and recompile kernel.\n");
5093                 goto err_unmap;
5094         }
5095
5096         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5097                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5098                 /* allocate IRQ */
5099                 retval = request_irq(irq, cyy_interrupt,
5100                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5101                 if (retval) {
5102                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5103                         goto err_unmap;
5104                 }
5105                 cy_card[card_no].num_chips = nchan / 4;
5106         } else {
5107 #ifdef CONFIG_CYZ_INTR
5108                 /* allocate IRQ only if board has an IRQ */
5109                 if (irq != 0 && irq != 255) {
5110                         retval = request_irq(irq, cyz_interrupt,
5111                                         IRQF_SHARED, "Cyclades-Z",
5112                                         &cy_card[card_no]);
5113                         if (retval) {
5114                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5115                                 goto err_unmap;
5116                         }
5117                 }
5118 #endif                          /* CONFIG_CYZ_INTR */
5119                 cy_card[card_no].num_chips = (unsigned int)-1;
5120         }
5121
5122         /* set cy_card */
5123         cy_card[card_no].base_addr = addr2;
5124         cy_card[card_no].ctl_addr = addr0;
5125         cy_card[card_no].irq = irq;
5126         cy_card[card_no].bus_index = 1;
5127         cy_card[card_no].first_line = cy_next_channel;
5128         retval = cy_init_card(&cy_card[card_no]);
5129         if (retval)
5130                 goto err_null;
5131
5132         pci_set_drvdata(pdev, &cy_card[card_no]);
5133
5134         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5135                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5136                 /* enable interrupts in the PCI interface */
5137                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5138                 switch (plx_ver) {
5139                 case PLX_9050:
5140
5141                         cy_writeb(addr0 + 0x4c, 0x43);
5142                         break;
5143
5144                 case PLX_9060:
5145                 case PLX_9080:
5146                 default:        /* Old boards, use PLX_9060 */
5147                         plx_init(pdev, irq, addr0);
5148                         cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5149                         break;
5150                 }
5151         }
5152
5153         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5154                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5155         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5156                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5157         cy_next_channel += nchan;
5158
5159         return 0;
5160 err_null:
5161         cy_card[card_no].base_addr = NULL;
5162         free_irq(irq, &cy_card[card_no]);
5163 err_unmap:
5164         iounmap(addr0);
5165         if (addr2)
5166                 iounmap(addr2);
5167 err_reg:
5168         pci_release_regions(pdev);
5169 err_dis:
5170         pci_disable_device(pdev);
5171 err:
5172         return retval;
5173 }
5174
5175 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5176 {
5177         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5178         unsigned int i;
5179
5180         /* non-Z with old PLX */
5181         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5182                         PLX_9050)
5183                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5184         else
5185 #ifndef CONFIG_CYZ_INTR
5186                 if (!IS_CYC_Z(*cinfo))
5187 #endif
5188                 cy_writew(cinfo->ctl_addr + 0x68,
5189                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5190
5191         iounmap(cinfo->base_addr);
5192         if (cinfo->ctl_addr)
5193                 iounmap(cinfo->ctl_addr);
5194         if (cinfo->irq
5195 #ifndef CONFIG_CYZ_INTR
5196                 && !IS_CYC_Z(*cinfo)
5197 #endif /* CONFIG_CYZ_INTR */
5198                 )
5199                 free_irq(cinfo->irq, cinfo);
5200         pci_release_regions(pdev);
5201
5202         cinfo->base_addr = NULL;
5203         for (i = cinfo->first_line; i < cinfo->first_line +
5204                         cinfo->nports; i++)
5205                 tty_unregister_device(cy_serial_driver, i);
5206         cinfo->nports = 0;
5207         kfree(cinfo->ports);
5208 }
5209
5210 static struct pci_driver cy_pci_driver = {
5211         .name = "cyclades",
5212         .id_table = cy_pci_dev_id,
5213         .probe = cy_pci_probe,
5214         .remove = __devexit_p(cy_pci_remove)
5215 };
5216 #endif
5217
5218 static int cyclades_proc_show(struct seq_file *m, void *v)
5219 {
5220         struct cyclades_port *info;
5221         unsigned int i, j;
5222         __u32 cur_jifs = jiffies;
5223
5224         seq_puts(m, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5225                         "IdleIn  Overruns  Ldisc\n");
5226
5227         /* Output one line for each known port */
5228         for (i = 0; i < NR_CARDS; i++)
5229                 for (j = 0; j < cy_card[i].nports; j++) {
5230                         info = &cy_card[i].ports[j];
5231
5232                         if (info->port.count)
5233                                 seq_printf(m, "%3d %8lu %10lu %8lu "
5234                                         "%10lu %8lu %9lu %6ld\n", info->line,
5235                                         (cur_jifs - info->idle_stats.in_use) /
5236                                         HZ, info->idle_stats.xmit_bytes,
5237                                         (cur_jifs - info->idle_stats.xmit_idle)/
5238                                         HZ, info->idle_stats.recv_bytes,
5239                                         (cur_jifs - info->idle_stats.recv_idle)/
5240                                         HZ, info->idle_stats.overruns,
5241                                         /* FIXME: double check locking */
5242                                         (long)info->port.tty->ldisc.ops->num);
5243                         else
5244                                 seq_printf(m, "%3d %8lu %10lu %8lu "
5245                                         "%10lu %8lu %9lu %6ld\n",
5246                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5247                 }
5248         return 0;
5249 }
5250
5251 static int cyclades_proc_open(struct inode *inode, struct file *file)
5252 {
5253         return single_open(file, cyclades_proc_show, NULL);
5254 }
5255
5256 static const struct file_operations cyclades_proc_fops = {
5257         .owner          = THIS_MODULE,
5258         .open           = cyclades_proc_open,
5259         .read           = seq_read,
5260         .llseek         = seq_lseek,
5261         .release        = single_release,
5262 };
5263
5264 /* The serial driver boot-time initialization code!
5265     Hardware I/O ports are mapped to character special devices on a
5266     first found, first allocated manner.  That is, this code searches
5267     for Cyclom cards in the system.  As each is found, it is probed
5268     to discover how many chips (and thus how many ports) are present.
5269     These ports are mapped to the tty ports 32 and upward in monotonic
5270     fashion.  If an 8-port card is replaced with a 16-port card, the
5271     port mapping on a following card will shift.
5272
5273     This approach is different from what is used in the other serial
5274     device driver because the Cyclom is more properly a multiplexer,
5275     not just an aggregation of serial ports on one card.
5276
5277     If there are more cards with more ports than have been
5278     statically allocated above, a warning is printed and the
5279     extra ports are ignored.
5280  */
5281
5282 static const struct tty_operations cy_ops = {
5283         .open = cy_open,
5284         .close = cy_close,
5285         .write = cy_write,
5286         .put_char = cy_put_char,
5287         .flush_chars = cy_flush_chars,
5288         .write_room = cy_write_room,
5289         .chars_in_buffer = cy_chars_in_buffer,
5290         .flush_buffer = cy_flush_buffer,
5291         .ioctl = cy_ioctl,
5292         .throttle = cy_throttle,
5293         .unthrottle = cy_unthrottle,
5294         .set_termios = cy_set_termios,
5295         .stop = cy_stop,
5296         .start = cy_start,
5297         .hangup = cy_hangup,
5298         .break_ctl = cy_break,
5299         .wait_until_sent = cy_wait_until_sent,
5300         .tiocmget = cy_tiocmget,
5301         .tiocmset = cy_tiocmset,
5302         .proc_fops = &cyclades_proc_fops,
5303 };
5304
5305 static int __init cy_init(void)
5306 {
5307         unsigned int nboards;
5308         int retval = -ENOMEM;
5309
5310         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5311         if (!cy_serial_driver)
5312                 goto err;
5313
5314         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5315                         __DATE__, __TIME__);
5316
5317         /* Initialize the tty_driver structure */
5318
5319         cy_serial_driver->owner = THIS_MODULE;
5320         cy_serial_driver->driver_name = "cyclades";
5321         cy_serial_driver->name = "ttyC";
5322         cy_serial_driver->major = CYCLADES_MAJOR;
5323         cy_serial_driver->minor_start = 0;
5324         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5325         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5326         cy_serial_driver->init_termios = tty_std_termios;
5327         cy_serial_driver->init_termios.c_cflag =
5328             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5329         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5330         tty_set_operations(cy_serial_driver, &cy_ops);
5331
5332         retval = tty_register_driver(cy_serial_driver);
5333         if (retval) {
5334                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5335                 goto err_frtty;
5336         }
5337
5338         /* the code below is responsible to find the boards. Each different
5339            type of board has its own detection routine. If a board is found,
5340            the next cy_card structure available is set by the detection
5341            routine. These functions are responsible for checking the
5342            availability of cy_card and cy_port data structures and updating
5343            the cy_next_channel. */
5344
5345         /* look for isa boards */
5346         nboards = cy_detect_isa();
5347
5348 #ifdef CONFIG_PCI
5349         /* look for pci boards */
5350         retval = pci_register_driver(&cy_pci_driver);
5351         if (retval && !nboards) {
5352                 tty_unregister_driver(cy_serial_driver);
5353                 goto err_frtty;
5354         }
5355 #endif
5356
5357         return 0;
5358 err_frtty:
5359         put_tty_driver(cy_serial_driver);
5360 err:
5361         return retval;
5362 }                               /* cy_init */
5363
5364 static void __exit cy_cleanup_module(void)
5365 {
5366         struct cyclades_card *card;
5367         unsigned int i, e1;
5368
5369 #ifndef CONFIG_CYZ_INTR
5370         del_timer_sync(&cyz_timerlist);
5371 #endif /* CONFIG_CYZ_INTR */
5372
5373         e1 = tty_unregister_driver(cy_serial_driver);
5374         if (e1)
5375                 printk(KERN_ERR "failed to unregister Cyclades serial "
5376                                 "driver(%d)\n", e1);
5377
5378 #ifdef CONFIG_PCI
5379         pci_unregister_driver(&cy_pci_driver);
5380 #endif
5381
5382         for (i = 0; i < NR_CARDS; i++) {
5383                 card = &cy_card[i];
5384                 if (card->base_addr) {
5385                         /* clear interrupt */
5386                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5387                         iounmap(card->base_addr);
5388                         if (card->ctl_addr)
5389                                 iounmap(card->ctl_addr);
5390                         if (card->irq
5391 #ifndef CONFIG_CYZ_INTR
5392                                 && !IS_CYC_Z(*card)
5393 #endif /* CONFIG_CYZ_INTR */
5394                                 )
5395                                 free_irq(card->irq, card);
5396                         for (e1 = card->first_line; e1 < card->first_line +
5397                                         card->nports; e1++)
5398                                 tty_unregister_device(cy_serial_driver, e1);
5399                         kfree(card->ports);
5400                 }
5401         }
5402
5403         put_tty_driver(cy_serial_driver);
5404 } /* cy_cleanup_module */
5405
5406 module_init(cy_init);
5407 module_exit(cy_cleanup_module);
5408
5409 MODULE_LICENSE("GPL");
5410 MODULE_VERSION(CY_VERSION);