3 #undef Z_EXT_CHARS_IN_BUFFER
5 "$Revision: 2.3.2.20 $$Date: 2004/02/25 18:14:16 $";
8 * linux/drivers/char/cyclades.c
10 * This file contains the driver for the Cyclades async multiport
13 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
14 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
15 * Currently maintained by Cyclades team <async@cyclades.com>.
17 * For Technical support and installation problems, please send e-mail
18 * to support@cyclades.com.
20 * Much of the design and some of the code came from serial.c
21 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
22 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
23 * and then fixed as suggested by Michael K. Johnson 12/12/92.
25 * This version supports shared IRQ's (only for PCI boards).
27 * $Log: cyclades.c,v $
28 * Prevent users from opening non-existing Z ports.
30 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
31 * Fixed the PCI detection function to work properly on Alpha systems.
32 * Implemented support for TIOCSERGETLSR ioctl.
33 * Implemented full support for non-standard baud rates.
35 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
36 * Request PLX I/O region, although driver doesn't use it, to avoid
37 * problems with other drivers accessing it.
38 * Removed count for on-board buffer characters in cy_chars_in_buffer
41 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
42 * Driver now reports physical instead of virtual memory addresses.
43 * Masks were added to some Cyclades-Z read accesses.
44 * Implemented workaround for PLX9050 bug that would cause a system lockup
45 * in certain systems, depending on the MMIO addresses allocated to the
47 * Changed the Tx interrupt programming in the CD1400 chips to boost up
48 * performance (Cyclom-Y only).
49 * Code is now compliant with the new module interface (module_[init|exit]).
50 * Make use of the PCI helper functions to access PCI resources.
51 * Did some code "housekeeping".
53 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
54 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
56 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
57 * Fixed SMP locking in Cyclom-Y interrupt handler.
59 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
60 * Added a new cyclades_card field called nports to allow the driver to
61 * know the exact number of ports found by the Z firmware after its load;
62 * RX buffer contention prevention logic on interrupt op mode revisited
64 * Revisited printk's for Z debug;
65 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
67 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
68 * Fixed bug in cyz_poll that would make all ports but port 0
69 * unable to transmit/receive data (Cyclades-Z only);
70 * Implemented logic to prevent the RX buffer from being stuck with data
71 * due to a driver / firmware race condition in interrupt op mode
73 * Fixed bug in block_til_ready logic that would lead to a system crash;
74 * Revisited cy_close spinlock usage;
76 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
77 * Revisited CONFIG_PCI conditional compilation for PCI board support;
78 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
79 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
80 * Removed CTS handling from the driver -- this is now completely handled
81 * by the firmware (Cyclades-Z only);
82 * Flush RX on-board buffers on a port open (Cyclades-Z only);
83 * Fixed handling of ASYNC_SPD_* TTY flags;
84 * Module unload now unmaps all memory area allocated by ioremap;
86 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
87 * Removed CY_PROC conditional compilation;
88 * Implemented SMP-awareness for the driver;
89 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
91 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
92 * (irq=NN) as parameters (only for ISA boards);
93 * Fixed bug in set_line_char that would prevent the Cyclades-Z
94 * ports from being configured at speeds above 115.2Kbps;
95 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
96 * switching from working properly;
97 * The driver now only prints IRQ info for the Cyclades-Z if it's
98 * configured to work in interrupt mode;
100 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
101 * Added support for interrupt mode operation for the Z cards;
102 * Removed the driver inactivity control for the Z;
103 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
104 * the Z firmware is not loaded yet;
105 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
106 * same functionality;
107 * Implemented workaround for IRQ setting loss on the PCI configuration
108 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
110 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
111 * /proc entry location changed to /proc/tty/driver/cyclades;
112 * Added support to shared IRQ's (only for PCI boards);
113 * Added support for Cobalt Qube2 systems;
114 * IRQ [de]allocation scheme revisited;
115 * BREAK implementation changed in order to make use of the 'break_ctl'
117 * Fixed typo in TTY structure field 'driver_name';
118 * Included a PCI bridge reset and EEPROM reload in the board
119 * initialization code (for both Y and Z series).
121 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
122 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
123 * closed properly after a SIGINT;
124 * Module usage counter scheme revisited;
125 * Added support to the upcoming Y PCI boards (i.e., support to additional
128 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
129 * Removed all unnecessary page-alignement operations in ioremap calls
130 * (ioremap is currently safe for these operations).
132 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
133 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
134 * order to make PLX9050-based boards work with certain motherboards.
136 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
137 * cy_close function now resets (correctly) the tty->closing flag;
138 * JIFFIES_DIFF macro fixed.
140 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
141 * Fixed bug in cy_close function, which was not informing HW of
142 * which port should have the reception disabled before doing so;
143 * fixed Cyclom-8YoP hardware detection bug.
145 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
146 * Fixed bug in cy_close function, which causes malfunction
147 * of one of the first 4 ports when a higher port is closed
150 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
151 * Fixed Cyclom-4Yo hardware detection bug.
153 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
154 * /proc/cyclades implementation with great collaboration of
155 * Marc Lewis <marc@blarg.net>;
156 * cyy_interrupt was changed to avoid occurrence of kernel oopses
157 * during PPP operation.
159 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
160 * General code review in order to comply with 2.1 kernel standards;
161 * data loss prevention for slow devices revisited (cy_wait_until_sent
163 * removed conditional compilation for new/old PCI structure support
164 * (now the driver only supports the new PCI structure).
166 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
167 * added conditional compilation for new/old PCI structure support;
168 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
170 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
171 * cleaned up the data loss fix;
172 * fixed XON/XOFF handling once more (Cyclades-Z);
173 * general review of the driver routines;
174 * introduction of a mechanism to prevent data loss with slow
175 * printers, by forcing a delay before closing the port.
177 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
178 * fixed detection/handling of new CD1400 in Ye boards;
179 * fixed XON/XOFF handling (Cyclades-Z);
180 * fixed data loss caused by a premature port close;
181 * introduction of a flag that holds the CD1400 version ID per port
182 * (used by the CYGETCD1400VER new ioctl).
184 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
185 * Code review for the module cleanup routine;
186 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
187 * includes anonymous changes regarding signal_pending.
189 * Revision 2.1 1997/11/01 17:42:41 ivan
190 * Changes in the driver to support Alpha systems (except 8Zo V_1);
191 * BREAK fix for the Cyclades-Z boards;
192 * driver inactivity control by FW implemented;
193 * introduction of flag that allows driver to take advantage of
194 * a special CD1400 feature related to HW flow control;
195 * added support for the CD1400 rev. J (Cyclom-Y boards);
196 * introduction of ioctls to:
197 * - control the rtsdtr_inv flag (Cyclom-Y);
198 * - control the rflow flag (Cyclom-Y);
199 * - adjust the polling interval (Cyclades-Z);
201 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
202 * Fixes related to kernel version conditional
205 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
206 * Compatibility issues between kernels 2.0.x and
207 * 2.1.x (mainly related to clear_bit function).
209 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
210 * Changes to define the memory window according to the
213 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
214 * Changes to support new cycladesZ boards.
216 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
217 * Merge of Bentson's and Daniel's version 1.36.4.28.
218 * Corrects bug in cy_detect_pci: check if there are more
219 * ports than the number of static structs allocated.
220 * Warning message during initialization if this driver is
221 * used with the new generation of cycladesZ boards. Those
222 * will be supported only in next release of the driver.
223 * Corrects bug in cy_detect_pci and cy_detect_isa that
224 * returned wrong number of VALID boards, when a cyclomY
225 * was found with no serial modules connected.
226 * Changes to use current (2.1.x) kernel subroutine names
227 * and created macros for compilation with 2.0.x kernel,
228 * instead of the other way around.
230 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
231 * Change queue_task_irq_off to queue_task_irq.
232 * The inline function queue_task_irq_off (tqueue.h)
233 * was removed from latest releases of 2.1.x kernel.
234 * Use of macro __init to mark the initialization
235 * routines, so memory can be reused.
236 * Also incorporate implementation of critical region
237 * in function cleanup_module() created by anonymous
240 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
241 * Change to support new firmware that solves DCD problem:
242 * application could fail to receive SIGHUP signal when DCD
245 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
246 * Changed for support linux versions 2.1.X.
247 * Backward compatible with linux versions 2.0.X.
248 * Corrected illegal use of filler field in
250 * Deleted some debug messages.
252 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
253 * Included check for NULL tty pointer in cyz_poll.
255 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
256 * Bill Foster at Blarg! Online services noticed that
257 * some of the switch elements of -Z modem control
258 * lacked a closing "break;"
260 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
261 * Changed low water threshold for buffer xmit_buf
263 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
264 * Marcio provided fix to modem status fetch for -Z
266 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
267 * improve mapping of -Z control page (thanks to Steve
268 * Price <stevep@fa.tdktca.com> for help on this)
270 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
271 * shift from CPU-bound to memcopy in cyz_polling operation
273 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
274 * Added support to set and report higher speeds.
276 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
277 * Some fixes in the HW flow control for the BETA release.
278 * Don't try to register the IRQ.
280 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
281 * make sure "cyc" appears in all kernel messages; all soft interrupts
282 * handled by same routine; recognize out-of-band reception; comment
283 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
284 * fix race condition in -Z buffer management; only -Y needs to explicitly
285 * flush chars; tidy up some startup messages;
287 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
288 * shift MOD_INC_USE_COUNT location to match
289 * serial.c; purge some diagnostic messages;
291 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
292 * enable modem status messages and fetch & process them; note
293 * time of last activity type for each port; set_line_char now
294 * supports more than line 0 and treats 0 baud correctly;
295 * get_modem_info senses rs_status;
297 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
298 * barely works--now's time to turn on
299 * more features 'til it breaks
301 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
302 * check more -Z board status; shorten boot message
304 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
305 * fix reference to ch_ctrl in startup; verify return
306 * values from cyz_issue_cmd and cyz_update_channel;
307 * more stuff to get modem control correct;
309 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
310 * more -Z stuff folded in; re-order changes to put -Z stuff
311 * after -Y stuff (to make changes clearer)
313 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
314 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
315 * Add code to send break. Clear firmware ID word at startup (so
316 * that other code won't talk to inactive board).
318 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
319 * add code for -Z in set_line_char
321 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
322 * fold more -Z stuff (or in some cases, error messages)
323 * into driver; add text to "don't know what to do" messages.
325 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
326 * moved compile-time flags near top of file; cosmetic changes
327 * to narrow text (to allow 2-up printing); changed many declarations
328 * to "static" to limit external symbols; shuffled code order to
329 * coalesce -Y and -Z specific code, also to put internal functions
330 * in order of tty_driver structure; added code to recognize -Z
331 * ports (and for moment, do nothing or report error); add cy_startup
332 * to parse boot command line for extra base addresses for ISA probes;
334 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
335 * reorder some code, fix types of some vars (int vs. long),
336 * add cy_setup to support user declared ISA addresses
338 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
339 * dump ioctl based firmware load (it's now a user level
340 * program); ensure uninitialzed ports cannot be used
342 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
343 * rename vars and restructure some code
345 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
346 * get right status back after boot load
348 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
349 * successfully loads firmware
351 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
352 * add more of the code for the boot/load ioctls
354 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
355 * start to add Z functionality--starting with ioctl
356 * for loading firmware
358 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
359 * added code to recognize Z/PCI card at initialization; report
360 * presence, but card is not initialized (because firmware needs
363 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
364 * starting minor number at zero; added missing verify_area
365 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
367 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
368 * remove unneeded boot message & fix CLOCAL hardware flow
369 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
370 * remove unused diagnostic statements; minor 0 is first;
372 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
373 * The kernel function vremap (available only in later 1.3.xx kernels)
374 * allows the access to memory addresses above the RAM. This revision
375 * of the driver supports PCI boards below 1Mb (device id 0x100) and
376 * above 1Mb (device id 0x101).
378 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
379 * Some global changes to interrupt handling spilled into
380 * this driver--mostly unused arguments in system function
381 * calls. Also added change by Marcio Saito which should
382 * reduce lost interrupts at startup by fast processors.
384 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
385 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
386 * in 1.3.41 kernel to remove a possible race condition, extend
387 * some error messages, and let the driver run as a loadable module
388 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
389 * possible race condition.
390 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
392 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
393 * Changes by Linus Torvalds in 1.3.33 kernel distribution
394 * required due to reordering of driver initialization.
395 * Drivers are now initialized *after* memory management.
397 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
398 * remove printk from ISR; fix typo
400 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
401 * Minor fixes in the PCI board support. PCI function calls in
402 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
403 * <duncan@okay.com>. "bad serial count" message removed.
405 * Revision 1.36.3 1995/08/22 09:19:42 marcio
406 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
407 * board initialization. Changes in the boot messages. The driver
408 * supports up to 4 boards and 64 ports by default.
410 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
411 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
413 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
414 * add missing break in modem control block in ioctl switch statement
415 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
417 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
418 * make sure CTS flow control is set as soon as possible (thanks
419 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
421 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
422 * initialize defaults for receive threshold and stale data timeout;
425 * Revision 1.36 1995/03/10 23:33:53 bentson
426 * added support of chips 4-7 in 32 port Cyclom-Ye;
427 * fix cy_interrupt pointer dereference problem
428 * (Joe Portman <baron@aa.net>);
429 * give better error response if open is attempted on non-existent port
430 * (Zachariah Vaum <jchryslr@netcom.com>);
431 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
432 * conditional compilation for -16Y on systems with fast, noisy bus;
433 * comment out diagnostic print function;
434 * cleaned up table of base addresses;
435 * set receiver time-out period register to correct value,
436 * set receive threshold to better default values,
437 * set chip timer to more accurate 200 Hz ticking,
438 * add code to monitor and modify receive parameters
439 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
440 * <njs@scifi.emi.net>);
442 * Revision 1.35 1994/12/16 13:54:18 steffen
443 * additional patch by Marcio Saito for board detection
444 * Accidently left out in 1.34
446 * Revision 1.34 1994/12/10 12:37:12 steffen
447 * This is the corrected version as suggested by Marcio Saito
449 * Revision 1.33 1994/12/01 22:41:18 bentson
450 * add hooks to support more high speeds directly; add tytso
451 * patch regarding CLOCAL wakeups
453 * Revision 1.32 1994/11/23 19:50:04 bentson
454 * allow direct kernel control of higher signalling rates;
455 * look for cards at additional locations
457 * Revision 1.31 1994/11/16 04:33:28 bentson
458 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
459 * a problem in chars_in_buffer has been resolved by some
460 * small changes; this should yield smoother output
462 * Revision 1.30 1994/11/16 04:28:05 bentson
463 * Fix from Corey Minyard, Internet: minyard@metronet.com,
464 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
465 * cy_hangup that appears to clear up much (all?) of the
466 * DTR glitches; also he's added/cleaned-up diagnostic messages
468 * Revision 1.29 1994/11/16 04:16:07 bentson
469 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
470 * operate higher speeds in same way as other serial ports;
471 * add more serial ports (for up to two 16-port muxes).
473 * Revision 1.28 1994/11/04 00:13:16 root
474 * turn off diagnostic messages
476 * Revision 1.27 1994/11/03 23:46:37 root
477 * bunch of changes to bring driver into greater conformance
478 * with the serial.c driver (looking for missed fixes)
480 * Revision 1.26 1994/11/03 22:40:36 root
481 * automatic interrupt probing fixed.
483 * Revision 1.25 1994/11/03 20:17:02 root
484 * start to implement auto-irq
486 * Revision 1.24 1994/11/03 18:01:55 root
487 * still working on modem signals--trying not to drop DTR
488 * during the getty/login processes
490 * Revision 1.23 1994/11/03 17:51:36 root
491 * extend baud rate support; set receive threshold as function
492 * of baud rate; fix some problems with RTS/CTS;
494 * Revision 1.22 1994/11/02 18:05:35 root
495 * changed arguments to udelay to type long to get
496 * delays to be of correct duration
498 * Revision 1.21 1994/11/02 17:37:30 root
499 * employ udelay (after calibrating loops_per_second earlier
500 * in init/main.c) instead of using home-grown delay routines
502 * Revision 1.20 1994/11/02 03:11:38 root
503 * cy_chars_in_buffer forces a return value of 0 to let
504 * login work (don't know why it does); some functions
505 * that were returning EFAULT, now executes the code;
506 * more work on deciding when to disable xmit interrupts;
508 * Revision 1.19 1994/11/01 20:10:14 root
509 * define routine to start transmission interrupts (by enabling
510 * transmit interrupts); directly enable/disable modem interrupts;
512 * Revision 1.18 1994/11/01 18:40:45 bentson
513 * Don't always enable transmit interrupts in startup; interrupt on
514 * TxMpty instead of TxRdy to help characters get out before shutdown;
515 * restructure xmit interrupt to check for chars first and quit if
516 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
519 * Revision 1.17 1994/10/30 04:39:45 bentson
520 * rename serial_driver and callout_driver to cy_serial_driver and
521 * cy_callout_driver to avoid linkage interference; initialize
522 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
523 * from cyclades_port structure; add paranoia check to cy_close;
525 * Revision 1.16 1994/10/30 01:14:33 bentson
526 * change major numbers; add some _early_ return statements;
528 * Revision 1.15 1994/10/29 06:43:15 bentson
529 * final tidying up for clean compile; enable some error reporting
531 * Revision 1.14 1994/10/28 20:30:22 Bentson
532 * lots of changes to drag the driver towards the new tty_io
533 * structures and operation. not expected to work, but may
536 * Revision 1.13 1994/07/21 23:08:57 Bentson
537 * add some diagnostic cruft; support 24 lines (for testing
538 * both -8Y and -16Y cards; be more thorough in servicing all
539 * chips during interrupt; add "volatile" a few places to
540 * circumvent compiler optimizations; fix base & offset
541 * computations in block_til_ready (was causing chip 0 to
544 * Revision 1.12 1994/07/19 16:42:11 Bentson
545 * add some hackery for kernel version 1.1.8; expand
546 * error messages; refine timing for delay loops and
547 * declare loop params volatile
549 * Revision 1.11 1994/06/11 21:53:10 bentson
550 * get use of save_car right in transmit interrupt service
552 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
553 * add some diagnostic printing; try to fix save_car stuff
555 * Revision 1.10 1994/06/11 20:36:08 bentson
556 * clean up compiler warnings
558 * Revision 1.9 1994/06/11 19:42:46 bentson
559 * added a bunch of code to support modem signalling
561 * Revision 1.8 1994/06/11 17:57:07 bentson
562 * recognize break & parity error
564 * Revision 1.7 1994/06/05 05:51:34 bentson
565 * Reorder baud table to be monotonic; add cli to CP; discard
566 * incoming characters and status if the line isn't open; start to
567 * fold code into cy_throttle; start to port get_serial_info,
568 * set_serial_info, get_modem_info, set_modem_info, and send_break
569 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
570 * get flow control characters from tty struct; invalidate ports w/o
573 * Revision 1.6 1994/05/31 18:42:21 bentson
574 * add a loop-breaker in the interrupt service routine;
575 * note when port is initialized so that it can be shut
576 * down under the right conditions; receive works without
579 * Revision 1.5 1994/05/30 00:55:02 bentson
580 * transmit works without obvious errors
582 * Revision 1.4 1994/05/27 18:46:27 bentson
583 * incorporated more code from lib_y.c; can now print short
584 * strings under interrupt control to port zero; seems to
585 * select ports/channels/lines correctly
587 * Revision 1.3 1994/05/25 22:12:44 bentson
588 * shifting from multi-port on a card to proper multiplexor
589 * data structures; added skeletons of most routines
591 * Revision 1.2 1994/05/19 13:21:43 bentson
592 * start to crib from other sources
596 /* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
609 #define ZE_V1_NPORTS 64
614 #define SERIAL_PARANOIA_CHECK
616 #undef CY_DEBUG_THROTTLE
617 #undef CY_DEBUG_OTHER
619 #undef CY_DEBUG_COUNT
621 #undef CY_DEBUG_WAIT_UNTIL_SENT
622 #undef CY_DEBUG_INTERRUPTS
624 #undef CY_ENABLE_MONITORING
628 #define PAUSE __asm__("nop");
636 #include <linux/module.h>
637 #include <linux/errno.h>
638 #include <linux/signal.h>
639 #include <linux/sched.h>
640 #include <linux/timer.h>
641 #include <linux/interrupt.h>
642 #include <linux/tty.h>
643 #include <linux/tty_flip.h>
644 #include <linux/serial.h>
645 #include <linux/major.h>
646 #include <linux/string.h>
647 #include <linux/fcntl.h>
648 #include <linux/ptrace.h>
649 #include <linux/cyclades.h>
650 #include <linux/mm.h>
651 #include <linux/ioport.h>
652 #include <linux/init.h>
653 #include <linux/delay.h>
654 #include <linux/spinlock.h>
655 #include <linux/bitops.h>
657 #include <asm/system.h>
660 #include <asm/uaccess.h>
662 #define CY_LOCK(info,flags) \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
667 #define CY_UNLOCK(info,flags) \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
672 #include <linux/types.h>
673 #include <linux/kernel.h>
674 #include <linux/pci.h>
676 #include <linux/stat.h>
677 #include <linux/proc_fs.h>
679 static void cy_throttle (struct tty_struct *tty);
680 static void cy_send_xchar (struct tty_struct *tty, char ch);
682 #define IS_CYC_Z(card) ((card).num_chips == -1)
684 #define Z_FPGA_CHECK(card) \
685 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
686 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
688 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
689 ((card).ctl_addr))->mail_box_0)) || \
690 Z_FPGA_CHECK(card)) && \
691 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
692 ((card).base_addr+ID_ADDRESS))->signature)))
694 #ifndef SERIAL_XMIT_SIZE
695 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
697 #define WAKEUP_CHARS 256
699 #define STD_COM_FLAGS (0)
701 #define JIFFIES_DIFF(n, j) ((j) - (n))
703 static struct tty_driver *cy_serial_driver;
706 /* This is the address lookup table. The driver will probe for
707 Cyclom-Y/ISA boards at all addresses in here. If you want the
708 driver to probe addresses at a different address, add it to
709 this table. If the driver is probing some other board and
710 causing problems, remove the offending address from this table.
711 The cy_setup function extracts additional addresses from the
712 boot options line. The form is "cyclades=address,address..."
715 static unsigned int cy_isa_addresses[] = {
726 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
729 static long maddr[NR_CARDS] = { 0, };
730 static int irq[NR_CARDS] = { 0, };
732 module_param_array(maddr, long, NULL, 0);
733 module_param_array(irq, int, NULL, 0);
736 #endif /* CONFIG_ISA */
738 /* This is the per-card data structure containing address, irq, number of
739 channels, etc. This driver supports a maximum of NR_CARDS cards.
741 static struct cyclades_card cy_card[NR_CARDS];
743 /* This is the per-channel data structure containing pointers, flags
744 and variables for the port. This driver supports a maximum of NR_PORTS.
746 static struct cyclades_port cy_port[NR_PORTS];
748 static int cy_next_channel; /* next minor available */
751 * This is used to look up the divisor speeds and the timeouts
752 * We're normally limited to 15 distinct baud rates. The extra
753 * are accessed via settings in info->flags.
754 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
755 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
759 static int baud_table[] = {
760 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
761 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000,
764 static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
770 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
771 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
772 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15};
774 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
775 /* value => 00 01 02 03 04 */
776 /* divide by 8 32 128 512 2048 */
777 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
778 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
781 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
782 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
783 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
786 static char baud_cor3[] = { /* receive threshold */
787 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
788 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
792 * The Cyclades driver implements HW flow control as any serial driver.
793 * The cyclades_port structure member rflow and the vector rflow_thr
794 * allows us to take advantage of a special feature in the CD1400 to avoid
795 * data loss even when the system interrupt latency is too high. These flags
796 * are to be used only with very special applications. Setting these flags
797 * requires the use of a special cable (DTR and RTS reversed). In the new
798 * CD1400-based boards (rev. 6.00 or later), there is no need for special
802 static char rflow_thr[] = { /* rflow threshold */
803 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
804 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
807 /* The Cyclom-Ye has placed the sequential chips in non-sequential
808 * address order. This look-up table overcomes that problem.
810 static int cy_chip_offset [] =
821 /* PCI related definitions */
823 static unsigned short cy_pci_nboard;
824 static unsigned short cy_isa_nboard;
825 static unsigned short cy_nboard;
827 static unsigned short cy_pci_dev_id[] = {
828 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
829 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
830 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
831 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
832 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
833 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
834 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
835 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
840 static void cy_start(struct tty_struct *);
841 static void set_line_char(struct cyclades_port *);
842 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
844 static unsigned detect_isa_irq(void __iomem *);
845 #endif /* CONFIG_ISA */
847 static int cyclades_get_proc_info(char *, char **, off_t , int , int *, void *);
849 #ifndef CONFIG_CYZ_INTR
850 static void cyz_poll(unsigned long);
852 /* The Cyclades-Z polling cycle is defined by this variable */
853 static long cyz_polling_cycle = CZ_DEF_POLL;
855 static int cyz_timeron = 0;
856 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
858 #else /* CONFIG_CYZ_INTR */
859 static void cyz_rx_restart(unsigned long);
860 static struct timer_list cyz_rx_full_timer[NR_PORTS];
861 #endif /* CONFIG_CYZ_INTR */
864 serial_paranoia_check(struct cyclades_port *info,
865 char *name, const char *routine)
867 #ifdef SERIAL_PARANOIA_CHECK
868 static const char *badmagic =
869 "cyc Warning: bad magic number for serial struct (%s) in %s\n";
870 static const char *badinfo =
871 "cyc Warning: null cyclades_port for (%s) in %s\n";
872 static const char *badrange =
873 "cyc Warning: cyclades_port out of range for (%s) in %s\n";
876 printk(badinfo, name, routine);
880 if( (long)info < (long)(&cy_port[0])
881 || (long)(&cy_port[NR_PORTS]) < (long)info ){
882 printk(badrange, name, routine);
886 if (info->magic != CYCLADES_MAGIC) {
887 printk(badmagic, name, routine);
892 } /* serial_paranoia_check */
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
901 cy_sched_event(struct cyclades_port *info, int event)
903 info->event |= 1 << event; /* remember what kind of event and who */
904 schedule_work(&info->tqueue);
905 } /* cy_sched_event */
909 * This routine is used to handle the "bottom half" processing for the
910 * serial driver, known also the "software interrupt" processing.
911 * This processing is done at the kernel interrupt level, after the
912 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
913 * is where time-consuming activities which can not be done in the
914 * interrupt driver proper are done; the interrupt driver schedules
915 * them using cy_sched_event(), and they get done here.
917 * This is done through one level of indirection--the task queue.
918 * When a hardware interrupt service routine wants service by the
919 * driver's bottom half, it enqueues the appropriate tq_struct (one
920 * per port) to the keventd work queue and sets a request flag
921 * that the work queue be processed.
923 * Although this may seem unwieldy, it gives the system a way to
924 * pass an argument (in this case the pointer to the cyclades_port
925 * structure) to the bottom half of the driver. Previous kernels
926 * had to poll every port to see if that port needed servicing.
929 do_softint(struct work_struct *work)
931 struct cyclades_port *info =
932 container_of(work, struct cyclades_port, tqueue);
933 struct tty_struct *tty;
939 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
940 tty_hangup(info->tty);
941 wake_up_interruptible(&info->open_wait);
942 info->flags &= ~ASYNC_NORMAL_ACTIVE;
944 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
945 wake_up_interruptible(&info->open_wait);
947 #ifdef CONFIG_CYZ_INTR
948 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
949 if (cyz_rx_full_timer[info->line].function == NULL) {
950 cyz_rx_full_timer[info->line].expires = jiffies + 1;
951 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
952 cyz_rx_full_timer[info->line].data = (unsigned long)info;
953 add_timer(&cyz_rx_full_timer[info->line]);
957 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) {
958 wake_up_interruptible(&info->delta_msr_wait);
960 if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
962 wake_up_interruptible(&tty->write_wait);
965 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
966 wake_up_interruptible(&info->shutdown_wait);
972 /***********************************************************/
973 /********* Start of block of Cyclom-Y specific code ********/
975 /* This routine waits up to 1000 micro-seconds for the previous
976 command to the Cirrus chip to complete and then issues the
977 new command. An error is returned if the previous command
978 didn't finish within the time limit.
980 This function is only called from inside spinlock-protected code.
983 cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
987 /* Check to see that the previous command has completed */
988 for(i = 0 ; i < 100 ; i++){
989 if (cy_readb(base_addr+(CyCCR<<index)) == 0){
994 /* if the CCR never cleared, the previous command
995 didn't finish within the "reasonable time" */
996 if (i == 100) return (-1);
998 /* Issue the new command */
999 cy_writeb(base_addr+(CyCCR<<index), cmd);
1002 } /* cyy_issue_cmd */
1005 /* ISA interrupt detection code */
1007 detect_isa_irq(void __iomem *address)
1010 unsigned long irqs, flags;
1011 int save_xir, save_car;
1012 int index = 0; /* IRQ probing is only for ISA */
1014 /* forget possible initially masked and pending IRQ */
1015 irq = probe_irq_off(probe_irq_on());
1017 /* Clear interrupts on the board first */
1018 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1019 /* Cy_ClrIntr is 0x1800 */
1021 irqs = probe_irq_on();
1025 /* Enable the Tx interrupts on the CD1400 */
1026 local_irq_save(flags);
1027 cy_writeb(address + (CyCAR<<index), 0);
1028 cyy_issue_cmd(address, CyCHAN_CTL|CyENB_XMTR, index);
1030 cy_writeb(address + (CyCAR<<index), 0);
1031 cy_writeb(address + (CySRER<<index),
1032 cy_readb(address + (CySRER<<index)) | CyTxRdy);
1033 local_irq_restore(flags);
1038 /* Check which interrupt is in use */
1039 irq = probe_irq_off(irqs);
1042 save_xir = (u_char) cy_readb(address + (CyTIR<<index));
1043 save_car = cy_readb(address + (CyCAR<<index));
1044 cy_writeb(address + (CyCAR<<index), (save_xir & 0x3));
1045 cy_writeb(address + (CySRER<<index),
1046 cy_readb(address + (CySRER<<index)) & ~CyTxRdy);
1047 cy_writeb(address + (CyTIR<<index), (save_xir & 0x3f));
1048 cy_writeb(address + (CyCAR<<index), (save_car));
1049 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1050 /* Cy_ClrIntr is 0x1800 */
1052 return (irq > 0)? irq : 0;
1054 #endif /* CONFIG_ISA */
1056 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1057 void __iomem *base_addr, int status, int index)
1059 struct cyclades_port *info;
1060 struct tty_struct *tty;
1061 volatile int char_count;
1062 int i, j, len, mdm_change, mdm_status, outch;
1063 int save_xir, channel, save_car;
1066 if (status & CySRReceive) { /* reception interrupt */
1067 #ifdef CY_DEBUG_INTERRUPTS
1068 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1070 /* determine the channel & change to that context */
1071 spin_lock(&cinfo->card_lock);
1072 save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
1073 channel = (u_short ) (save_xir & CyIRChannel);
1074 i = channel + chip * 4 + cinfo->first_line;
1076 info->last_active = jiffies;
1077 save_car = cy_readb(base_addr+(CyCAR<<index));
1078 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1080 /* if there is nowhere to put the data, discard it */
1082 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1083 if ( j == CyIVRRxEx ) { /* exception */
1084 data = cy_readb(base_addr+(CyRDSR<<index));
1085 } else { /* normal character reception */
1086 char_count = cy_readb(base_addr+(CyRDCR<<index));
1087 while(char_count--){
1088 data = cy_readb(base_addr+(CyRDSR<<index));
1091 }else{ /* there is an open port for this data */
1093 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1094 if ( j == CyIVRRxEx ) { /* exception */
1095 data = cy_readb(base_addr+(CyRDSR<<index));
1097 /* For statistics only */
1100 else if(data & CyFRAME)
1101 info->icount.frame++;
1102 else if(data & CyPARITY)
1103 info->icount.parity++;
1104 else if(data & CyOVERRUN)
1105 info->icount.overrun++;
1107 if(data & info->ignore_status_mask){
1111 if (tty_buffer_request_room(tty, 1)) {
1112 if (data & info->read_status_mask){
1114 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_BREAK);
1116 if (info->flags & ASYNC_SAK){
1119 }else if(data & CyFRAME){
1120 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
1122 info->idle_stats.frame_errs++;
1123 }else if(data & CyPARITY){
1124 /* Pieces of seven... */
1125 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_PARITY);
1127 info->idle_stats.parity_errs++;
1128 }else if(data & CyOVERRUN){
1129 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1131 /* If the flip buffer itself is
1132 overflowing, we still lose
1133 the next incoming character.
1135 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
1137 info->idle_stats.overruns++;
1138 /* These two conditions may imply */
1139 /* a normal read should be done. */
1140 /* }else if(data & CyTIMEOUT){ */
1141 /* }else if(data & CySPECHAR){ */
1143 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1147 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1151 /* there was a software buffer
1152 overrun and nothing could be
1154 info->icount.buf_overrun++;
1155 info->idle_stats.overruns++;
1157 } else { /* normal character reception */
1158 /* load # chars available from the chip */
1159 char_count = cy_readb(base_addr+(CyRDCR<<index));
1161 #ifdef CY_ENABLE_MONITORING
1162 ++info->mon.int_count;
1163 info->mon.char_count += char_count;
1164 if (char_count > info->mon.char_max)
1165 info->mon.char_max = char_count;
1166 info->mon.char_last = char_count;
1168 len = tty_buffer_request_room(tty, char_count);
1170 data = cy_readb(base_addr+(CyRDSR<<index));
1171 tty_insert_flip_char(tty, data, TTY_NORMAL);
1172 info->idle_stats.recv_bytes++;
1178 info->idle_stats.recv_idle = jiffies;
1180 tty_schedule_flip(tty);
1182 /* end of service */
1183 cy_writeb(base_addr+(CyRIR<<index), (save_xir & 0x3f));
1184 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1185 spin_unlock(&cinfo->card_lock);
1189 if (status & CySRTransmit) { /* transmission interrupt */
1190 /* Since we only get here when the transmit buffer
1191 is empty, we know we can always stuff a dozen
1193 #ifdef CY_DEBUG_INTERRUPTS
1194 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1197 /* determine the channel & change to that context */
1198 spin_lock(&cinfo->card_lock);
1199 save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
1200 channel = (u_short ) (save_xir & CyIRChannel);
1201 i = channel + chip * 4 + cinfo->first_line;
1202 save_car = cy_readb(base_addr+(CyCAR<<index));
1203 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1205 /* validate the port# (as configured and open) */
1206 if( (i < 0) || (NR_PORTS <= i) ){
1207 cy_writeb(base_addr+(CySRER<<index),
1208 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1212 info->last_active = jiffies;
1214 cy_writeb(base_addr+(CySRER<<index),
1215 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1219 /* load the on-chip space for outbound data */
1220 char_count = info->xmit_fifo_size;
1222 if(info->x_char) { /* send special char */
1223 outch = info->x_char;
1224 cy_writeb(base_addr+(CyTDR<<index), outch);
1230 if (info->breakon || info->breakoff) {
1231 if (info->breakon) {
1232 cy_writeb(base_addr + (CyTDR<<index), 0);
1233 cy_writeb(base_addr + (CyTDR<<index), 0x81);
1237 if (info->breakoff) {
1238 cy_writeb(base_addr + (CyTDR<<index), 0);
1239 cy_writeb(base_addr + (CyTDR<<index), 0x83);
1245 while (char_count-- > 0){
1246 if (!info->xmit_cnt){
1247 if (cy_readb(base_addr+(CySRER<<index))&CyTxMpty) {
1248 cy_writeb(base_addr+(CySRER<<index),
1249 cy_readb(base_addr+(CySRER<<index)) &
1252 cy_writeb(base_addr+(CySRER<<index),
1253 ((cy_readb(base_addr+(CySRER<<index))
1259 if (info->xmit_buf == 0){
1260 cy_writeb(base_addr+(CySRER<<index),
1261 cy_readb(base_addr+(CySRER<<index)) &
1265 if (info->tty->stopped || info->tty->hw_stopped){
1266 cy_writeb(base_addr+(CySRER<<index),
1267 cy_readb(base_addr+(CySRER<<index)) &
1271 /* Because the Embedded Transmit Commands have
1272 been enabled, we must check to see if the
1273 escape character, NULL, is being sent. If it
1274 is, we must ensure that there is room for it
1275 to be doubled in the output stream. Therefore
1276 we no longer advance the pointer when the
1277 character is fetched, but rather wait until
1278 after the check for a NULL output character.
1279 This is necessary because there may not be
1280 room for the two chars needed to send a NULL.)
1282 outch = info->xmit_buf[info->xmit_tail];
1285 info->xmit_tail = (info->xmit_tail + 1)
1286 & (SERIAL_XMIT_SIZE - 1);
1287 cy_writeb(base_addr+(CyTDR<<index), outch);
1292 info->xmit_tail = (info->xmit_tail + 1)
1293 & (SERIAL_XMIT_SIZE - 1);
1294 cy_writeb(base_addr+(CyTDR<<index),
1296 cy_writeb(base_addr+(CyTDR<<index), 0);
1305 if (info->xmit_cnt < WAKEUP_CHARS) {
1306 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1309 /* end of service */
1310 cy_writeb(base_addr+(CyTIR<<index),
1312 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1313 spin_unlock(&cinfo->card_lock);
1316 if (status & CySRModem) { /* modem interrupt */
1318 /* determine the channel & change to that context */
1319 spin_lock(&cinfo->card_lock);
1320 save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
1321 channel = (u_short ) (save_xir & CyIRChannel);
1322 info = &cy_port[channel + chip * 4
1323 + cinfo->first_line];
1324 info->last_active = jiffies;
1325 save_car = cy_readb(base_addr+(CyCAR<<index));
1326 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1328 mdm_change = cy_readb(base_addr+(CyMISR<<index));
1329 mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
1331 if(info->tty == 0){/* no place for data, ignore it*/
1334 if (mdm_change & CyANY_DELTA) {
1335 /* For statistics only */
1336 if (mdm_change & CyDCD) info->icount.dcd++;
1337 if (mdm_change & CyCTS) info->icount.cts++;
1338 if (mdm_change & CyDSR) info->icount.dsr++;
1339 if (mdm_change & CyRI) info->icount.rng++;
1341 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1344 if((mdm_change & CyDCD)
1345 && (info->flags & ASYNC_CHECK_CD)){
1346 if(mdm_status & CyDCD){
1347 cy_sched_event(info,
1348 Cy_EVENT_OPEN_WAKEUP);
1350 cy_sched_event(info,
1354 if((mdm_change & CyCTS)
1355 && (info->flags & ASYNC_CTS_FLOW)){
1356 if(info->tty->hw_stopped){
1357 if(mdm_status & CyCTS){
1358 /* cy_start isn't used
1360 info->tty->hw_stopped = 0;
1361 cy_writeb(base_addr+(CySRER<<index),
1362 cy_readb(base_addr+(CySRER<<index)) |
1364 cy_sched_event(info,
1365 Cy_EVENT_WRITE_WAKEUP);
1368 if(!(mdm_status & CyCTS)){
1369 /* cy_stop isn't used
1371 info->tty->hw_stopped = 1;
1372 cy_writeb(base_addr+(CySRER<<index),
1373 cy_readb(base_addr+(CySRER<<index)) &
1378 if(mdm_change & CyDSR){
1380 if(mdm_change & CyRI){
1383 /* end of service */
1384 cy_writeb(base_addr+(CyMIR<<index),
1386 cy_writeb(base_addr+(CyCAR<<index), save_car);
1387 spin_unlock(&cinfo->card_lock);
1391 /* The real interrupt service routine is called
1392 whenever the card wants its hand held--chars
1393 received, out buffer empty, modem change, etc.
1396 cyy_interrupt(int irq, void *dev_id)
1399 struct cyclades_card *cinfo;
1400 void __iomem *base_addr, *card_base_addr;
1406 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1407 #ifdef CY_DEBUG_INTERRUPTS
1408 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1410 return IRQ_NONE; /* spurious interrupt */
1413 card_base_addr = cinfo->base_addr;
1414 index = cinfo->bus_index;
1417 /* This loop checks all chips in the card. Make a note whenever
1418 _any_ chip had some work to do, as this is considered an
1419 indication that there will be more to do. Only when no chip
1420 has any work does this outermost loop exit.
1424 for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
1425 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
1427 while ( (status = cy_readb(base_addr+(CySVRR<<index))) != 0x00) {
1429 /* The purpose of the following test is to ensure that
1430 no chip can monopolize the driver. This forces the
1431 chips to be checked in a round-robin fashion (after
1432 draining each of a bunch (1000) of characters).
1434 if(1000<too_many++){
1437 cyy_intr_chip(cinfo, chip, base_addr, status, index);
1442 /* clear interrupts */
1443 spin_lock(&cinfo->card_lock);
1444 cy_writeb(card_base_addr + (Cy_ClrIntr<<index), 0);
1445 /* Cy_ClrIntr is 0x1800 */
1446 spin_unlock(&cinfo->card_lock);
1448 } /* cyy_interrupt */
1450 /***********************************************************/
1451 /********* End of block of Cyclom-Y specific code **********/
1452 /******** Start of block of Cyclades-Z specific code *********/
1453 /***********************************************************/
1456 cyz_fetch_msg( struct cyclades_card *cinfo,
1457 uclong *channel, ucchar *cmd, uclong *param)
1459 struct FIRM_ID __iomem *firm_id;
1460 struct ZFW_CTRL __iomem *zfw_ctrl;
1461 struct BOARD_CTRL __iomem *board_ctrl;
1462 unsigned long loc_doorbell;
1464 firm_id = cinfo->base_addr + ID_ADDRESS;
1465 if (!ISZLOADED(*cinfo)){
1468 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1469 board_ctrl = &zfw_ctrl->board_ctrl;
1471 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1472 (cinfo->ctl_addr))->loc_doorbell);
1474 *cmd = (char)(0xff & loc_doorbell);
1475 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1476 *param = (uclong)cy_readl(&board_ctrl->fwcmd_param);
1477 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->loc_doorbell,
1482 } /* cyz_fetch_msg */
1485 cyz_issue_cmd( struct cyclades_card *cinfo,
1486 uclong channel, ucchar cmd, uclong param)
1488 struct FIRM_ID __iomem *firm_id;
1489 struct ZFW_CTRL __iomem *zfw_ctrl;
1490 struct BOARD_CTRL __iomem *board_ctrl;
1491 unsigned long __iomem *pci_doorbell;
1494 firm_id = cinfo->base_addr + ID_ADDRESS;
1495 if (!ISZLOADED(*cinfo)){
1498 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1499 board_ctrl = &zfw_ctrl->board_ctrl;
1502 pci_doorbell = &((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->pci_doorbell;
1503 while( (cy_readl(pci_doorbell) & 0xff) != 0){
1504 if (index++ == 1000){
1505 return((int)(cy_readl(pci_doorbell) & 0xff));
1509 cy_writel(&board_ctrl->hcmd_channel, channel);
1510 cy_writel(&board_ctrl->hcmd_param , param);
1511 cy_writel(pci_doorbell, (long)cmd);
1514 } /* cyz_issue_cmd */
1517 cyz_handle_rx(struct cyclades_port *info,
1518 volatile struct CH_CTRL __iomem *ch_ctrl,
1519 volatile struct BUF_CTRL __iomem *buf_ctrl)
1521 struct cyclades_card *cinfo = &cy_card[info->card];
1522 struct tty_struct *tty = info->tty;
1523 volatile int char_count;
1530 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1532 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1533 rx_put = cy_readl(&buf_ctrl->rx_put);
1534 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1535 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1536 if (rx_put >= rx_get)
1537 char_count = rx_put - rx_get;
1539 char_count = rx_put - rx_get + rx_bufsize;
1542 info->last_active = jiffies;
1543 info->jiffies[1] = jiffies;
1545 #ifdef CY_ENABLE_MONITORING
1546 info->mon.int_count++;
1547 info->mon.char_count += char_count;
1548 if (char_count > info->mon.char_max)
1549 info->mon.char_max = char_count;
1550 info->mon.char_last = char_count;
1553 /* flush received characters */
1554 new_rx_get = (new_rx_get + char_count) & (rx_bufsize - 1);
1555 info->rflush_count++;
1558 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1559 for performance, but because of buffer boundaries, there
1560 may be several steps to the operation */
1561 while(0 < (small_count =
1562 min_t(unsigned int, (rx_bufsize - new_rx_get),
1563 min_t(unsigned int, (TTY_FLIPBUF_SIZE - tty->flip.count), char_count))
1565 memcpy_fromio(tty->flip.char_buf_ptr,
1566 (char *)(cinfo->base_addr
1567 + rx_bufaddr + new_rx_get),
1570 tty->flip.char_buf_ptr += small_count;
1571 memset(tty->flip.flag_buf_ptr, TTY_NORMAL, small_count);
1572 tty->flip.flag_buf_ptr += small_count;
1573 new_rx_get = (new_rx_get + small_count) & (rx_bufsize - 1);
1574 char_count -= small_count;
1575 info->icount.rx += small_count;
1576 info->idle_stats.recv_bytes += small_count;
1577 tty->flip.count += small_count;
1580 len = tty_buffer_request_room(tty, char_count);
1582 data = cy_readb(cinfo->base_addr + rx_bufaddr + new_rx_get);
1583 new_rx_get = (new_rx_get + 1) & (rx_bufsize - 1);
1584 tty_insert_flip_char(tty, data, TTY_NORMAL);
1585 info->idle_stats.recv_bytes++;
1589 #ifdef CONFIG_CYZ_INTR
1590 /* Recalculate the number of chars in the RX buffer and issue
1591 a cmd in case it's higher than the RX high water mark */
1592 rx_put = cy_readl(&buf_ctrl->rx_put);
1593 if (rx_put >= rx_get)
1594 char_count = rx_put - rx_get;
1596 char_count = rx_put - rx_get + rx_bufsize;
1597 if(char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
1598 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1601 info->idle_stats.recv_idle = jiffies;
1602 tty_schedule_flip(tty);
1605 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1610 cyz_handle_tx(struct cyclades_port *info,
1611 volatile struct CH_CTRL __iomem *ch_ctrl,
1612 volatile struct BUF_CTRL __iomem *buf_ctrl)
1614 struct cyclades_card *cinfo = &cy_card[info->card];
1615 struct tty_struct *tty = info->tty;
1617 volatile int char_count;
1621 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1623 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1626 tx_get = cy_readl(&buf_ctrl->tx_get);
1627 tx_put = cy_readl(&buf_ctrl->tx_put);
1628 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1629 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1630 if (tx_put >= tx_get)
1631 char_count = tx_get - tx_put - 1 + tx_bufsize;
1633 char_count = tx_get - tx_put - 1;
1641 if(info->x_char) { /* send special char */
1642 data = info->x_char;
1644 cy_writeb((cinfo->base_addr + tx_bufaddr + tx_put), data);
1645 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1649 info->last_active = jiffies;
1650 info->jiffies[2] = jiffies;
1653 while(0 < (small_count =
1654 min_t(unsigned int, (tx_bufsize - tx_put),
1655 min_t(unsigned int, (SERIAL_XMIT_SIZE - info->xmit_tail),
1656 min_t(unsigned int, info->xmit_cnt, char_count))))) {
1658 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1659 &info->xmit_buf[info->xmit_tail],
1662 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1663 char_count -= small_count;
1664 info->icount.tx += small_count;
1665 info->xmit_cnt -= small_count;
1667 (info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1);
1668 info->last_active = jiffies;
1669 info->jiffies[2] = jiffies;
1672 while (info->xmit_cnt && char_count){
1673 data = info->xmit_buf[info->xmit_tail];
1675 info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
1677 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1678 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1681 info->last_active = jiffies;
1682 info->jiffies[2] = jiffies;
1686 if (info->xmit_cnt < WAKEUP_CHARS) {
1687 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1690 cy_writel(&buf_ctrl->tx_put, tx_put);
1695 cyz_handle_cmd(struct cyclades_card *cinfo)
1697 struct tty_struct *tty;
1698 struct cyclades_port *info;
1699 static volatile struct FIRM_ID __iomem *firm_id;
1700 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1701 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1702 static volatile struct CH_CTRL __iomem *ch_ctrl;
1703 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1707 uclong hw_ver, fw_ver;
1711 firm_id = cinfo->base_addr + ID_ADDRESS;
1712 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1713 board_ctrl = &zfw_ctrl->board_ctrl;
1714 fw_ver = cy_readl(&board_ctrl->fw_version);
1715 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->mail_box_0);
1718 while(cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1721 info = &cy_port[channel + cinfo->first_line];
1722 if((tty = info->tty) == 0) {
1725 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1726 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1730 tty_insert_flip_char(tty, 0, TTY_PARITY);
1735 tty_insert_flip_char(tty, 0, TTY_FRAME);
1740 tty_insert_flip_char(tty, 0, TTY_BREAK);
1747 if (info->flags & ASYNC_CHECK_CD){
1750 cy_readl(&ch_ctrl->rs_status)) & C_RS_DCD) {
1751 cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
1753 cy_sched_event(info, Cy_EVENT_HANGUP);
1771 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1774 #ifdef CONFIG_CYZ_INTR
1778 /* Reception Interrupt */
1779 #ifdef CY_DEBUG_INTERRUPTS
1780 printk("cyz_interrupt: rcvd intr, card %d, port %ld\n\r",
1781 info->card, channel);
1783 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1788 /* Transmission Interrupt */
1789 #ifdef CY_DEBUG_INTERRUPTS
1790 printk("cyz_interrupt: xmit intr, card %d, port %ld\n\r",
1791 info->card, channel);
1793 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1795 #endif /* CONFIG_CYZ_INTR */
1797 /* should do something with this !!! */
1803 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1805 tty_schedule_flip(tty);
1809 #ifdef CONFIG_CYZ_INTR
1811 cyz_interrupt(int irq, void *dev_id)
1813 struct cyclades_card *cinfo;
1815 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1816 #ifdef CY_DEBUG_INTERRUPTS
1817 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1819 return IRQ_NONE; /* spurious interrupt */
1822 if (!ISZLOADED(*cinfo)) {
1823 #ifdef CY_DEBUG_INTERRUPTS
1824 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1829 /* Handle the interrupts */
1830 cyz_handle_cmd(cinfo);
1833 } /* cyz_interrupt */
1836 cyz_rx_restart(unsigned long arg)
1838 struct cyclades_port *info = (struct cyclades_port *)arg;
1840 int card = info->card;
1841 uclong channel = (info->line) - (cy_card[card].first_line);
1842 unsigned long flags;
1844 CY_LOCK(info, flags);
1845 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1847 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1848 info->line, retval);
1850 cyz_rx_full_timer[info->line].function = NULL;
1851 CY_UNLOCK(info, flags);
1854 #else /* CONFIG_CYZ_INTR */
1857 cyz_poll(unsigned long arg)
1859 struct cyclades_card *cinfo;
1860 struct cyclades_port *info;
1861 struct tty_struct *tty;
1862 static volatile struct FIRM_ID *firm_id;
1863 static volatile struct ZFW_CTRL *zfw_ctrl;
1864 static volatile struct BOARD_CTRL *board_ctrl;
1865 static volatile struct CH_CTRL *ch_ctrl;
1866 static volatile struct BUF_CTRL *buf_ctrl;
1869 cyz_timerlist.expires = jiffies + (HZ);
1870 for (card = 0 ; card < NR_CARDS ; card++){
1871 cinfo = &cy_card[card];
1873 if (!IS_CYC_Z(*cinfo)) continue;
1874 if (!ISZLOADED(*cinfo)) continue;
1876 firm_id = cinfo->base_addr + ID_ADDRESS;
1877 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1878 board_ctrl = &(zfw_ctrl->board_ctrl);
1880 /* Skip first polling cycle to avoid racing conditions with the FW */
1881 if (!cinfo->intr_enabled) {
1882 cinfo->nports = (int) cy_readl(&board_ctrl->n_channel);
1883 cinfo->intr_enabled = 1;
1887 cyz_handle_cmd(cinfo);
1889 for (port = 0 ; port < cinfo->nports ; port++) {
1890 info = &cy_port[ port + cinfo->first_line ];
1892 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1893 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1895 if (!info->throttle)
1896 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1897 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1899 /* poll every 'cyz_polling_cycle' period */
1900 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1902 add_timer(&cyz_timerlist);
1907 #endif /* CONFIG_CYZ_INTR */
1909 /********** End of block of Cyclades-Z specific code *********/
1910 /***********************************************************/
1913 /* This is called whenever a port becomes active;
1914 interrupts are enabled and DTR & RTS are turned on.
1917 startup(struct cyclades_port * info)
1919 unsigned long flags;
1921 void __iomem *base_addr;
1922 int card,chip,channel,index;
1926 channel = (info->line) - (cy_card[card].first_line);
1928 page = get_zeroed_page(GFP_KERNEL);
1932 CY_LOCK(info, flags);
1934 if (info->flags & ASYNC_INITIALIZED){
1941 set_bit(TTY_IO_ERROR, &info->tty->flags);
1950 info->xmit_buf = (unsigned char *) page;
1952 CY_UNLOCK(info, flags);
1954 set_line_char(info);
1956 if (!IS_CYC_Z(cy_card[card])) {
1959 index = cy_card[card].bus_index;
1960 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
1962 #ifdef CY_DEBUG_OPEN
1963 printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
1964 card, chip, channel, (long)base_addr);/**/
1967 CY_LOCK(info, flags);
1969 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
1971 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
1972 ? info->default_timeout : 0x02)); /* 10ms rx timeout */
1974 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index);
1976 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
1977 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
1978 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
1981 printk("cyc:startup raising DTR\n");
1982 printk(" status: 0x%x, 0x%x\n",
1983 cy_readb(base_addr+(CyMSVR1<<index)),
1984 cy_readb(base_addr+(CyMSVR2<<index)));
1987 cy_writeb(base_addr+(CySRER<<index),
1988 cy_readb(base_addr+(CySRER<<index)) | CyRxData);
1989 info->flags |= ASYNC_INITIALIZED;
1992 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1994 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1995 info->breakon = info->breakoff = 0;
1996 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1997 info->idle_stats.in_use =
1998 info->idle_stats.recv_idle =
1999 info->idle_stats.xmit_idle = jiffies;
2001 CY_UNLOCK(info, flags);
2004 struct FIRM_ID __iomem *firm_id;
2005 struct ZFW_CTRL __iomem *zfw_ctrl;
2006 struct BOARD_CTRL __iomem *board_ctrl;
2007 struct CH_CTRL __iomem *ch_ctrl;
2010 base_addr = cy_card[card].base_addr;
2012 firm_id = base_addr + ID_ADDRESS;
2013 if (!ISZLOADED(cy_card[card])){
2017 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2018 board_ctrl = &zfw_ctrl->board_ctrl;
2019 ch_ctrl = zfw_ctrl->ch_ctrl;
2021 #ifdef CY_DEBUG_OPEN
2022 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2023 card, channel, (long)base_addr);/**/
2026 CY_LOCK(info, flags);
2028 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2030 #ifdef CONFIG_CYZ_INTR
2031 cy_writel(&ch_ctrl[channel].intr_enable,
2032 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2036 cy_writel(&ch_ctrl[channel].intr_enable,
2039 #endif /* CONFIG_CYZ_INTR */
2041 #ifdef CONFIG_CYZ_INTR
2042 cy_writel(&ch_ctrl[channel].intr_enable,
2043 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2046 cy_writel(&ch_ctrl[channel].intr_enable,
2048 #endif /* CONFIG_CYZ_INTR */
2051 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2053 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2054 info->line, retval);
2057 /* Flush RX buffers before raising DTR and RTS */
2058 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX, 0L);
2060 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2061 info->line, retval);
2064 /* set timeout !!! */
2065 /* set RTS and DTR !!! */
2066 cy_writel(&ch_ctrl[channel].rs_control,
2067 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
2068 retval = cyz_issue_cmd(&cy_card[info->card],
2069 channel, C_CM_IOCTLM, 0L);
2071 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2072 info->line, retval);
2075 printk("cyc:startup raising Z DTR\n");
2078 /* enable send, recv, modem !!! */
2080 info->flags |= ASYNC_INITIALIZED;
2082 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2084 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2085 info->breakon = info->breakoff = 0;
2086 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2087 info->idle_stats.in_use =
2088 info->idle_stats.recv_idle =
2089 info->idle_stats.xmit_idle = jiffies;
2091 CY_UNLOCK(info, flags);
2094 #ifdef CY_DEBUG_OPEN
2095 printk(" cyc startup done\n");
2100 CY_UNLOCK(info, flags);
2106 start_xmit( struct cyclades_port *info )
2108 unsigned long flags;
2109 void __iomem *base_addr;
2110 int card,chip,channel,index;
2113 channel = (info->line) - (cy_card[card].first_line);
2114 if (!IS_CYC_Z(cy_card[card])) {
2117 index = cy_card[card].bus_index;
2118 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2120 CY_LOCK(info, flags);
2121 cy_writeb(base_addr+(CyCAR<<index), channel);
2122 cy_writeb(base_addr+(CySRER<<index),
2123 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
2124 CY_UNLOCK(info, flags);
2126 #ifdef CONFIG_CYZ_INTR
2129 CY_LOCK(info, flags);
2130 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, 0L);
2132 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2133 info->line, retval);
2135 CY_UNLOCK(info, flags);
2136 #else /* CONFIG_CYZ_INTR */
2137 /* Don't have to do anything at this time */
2138 #endif /* CONFIG_CYZ_INTR */
2143 * This routine shuts down a serial port; interrupts are disabled,
2144 * and DTR is dropped if the hangup on close termio flag is on.
2147 shutdown(struct cyclades_port * info)
2149 unsigned long flags;
2150 void __iomem *base_addr;
2151 int card,chip,channel,index;
2153 if (!(info->flags & ASYNC_INITIALIZED)){
2158 channel = info->line - cy_card[card].first_line;
2159 if (!IS_CYC_Z(cy_card[card])) {
2162 index = cy_card[card].bus_index;
2163 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2165 #ifdef CY_DEBUG_OPEN
2166 printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
2167 card, chip, channel, (long)base_addr);
2170 CY_LOCK(info, flags);
2172 /* Clear delta_msr_wait queue to avoid mem leaks. */
2173 wake_up_interruptible(&info->delta_msr_wait);
2175 if (info->xmit_buf){
2176 unsigned char * temp;
2177 temp = info->xmit_buf;
2178 info->xmit_buf = NULL;
2179 free_page((unsigned long) temp);
2181 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2182 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2183 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
2184 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
2186 printk("cyc shutdown dropping DTR\n");
2187 printk(" status: 0x%x, 0x%x\n",
2188 cy_readb(base_addr+(CyMSVR1<<index)),
2189 cy_readb(base_addr+(CyMSVR2<<index)));
2192 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR,index);
2193 /* it may be appropriate to clear _XMIT at
2194 some later date (after testing)!!! */
2197 set_bit(TTY_IO_ERROR, &info->tty->flags);
2199 info->flags &= ~ASYNC_INITIALIZED;
2200 CY_UNLOCK(info, flags);
2202 struct FIRM_ID __iomem *firm_id;
2203 struct ZFW_CTRL __iomem *zfw_ctrl;
2204 struct BOARD_CTRL __iomem *board_ctrl;
2205 struct CH_CTRL __iomem *ch_ctrl;
2208 base_addr = cy_card[card].base_addr;
2209 #ifdef CY_DEBUG_OPEN
2210 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2211 card, channel, (long)base_addr);
2214 firm_id = base_addr + ID_ADDRESS;
2215 if (!ISZLOADED(cy_card[card])) {
2219 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2220 board_ctrl = &zfw_ctrl->board_ctrl;
2221 ch_ctrl = zfw_ctrl->ch_ctrl;
2223 CY_LOCK(info, flags);
2225 if (info->xmit_buf){
2226 unsigned char * temp;
2227 temp = info->xmit_buf;
2228 info->xmit_buf = NULL;
2229 free_page((unsigned long) temp);
2232 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2233 cy_writel(&ch_ctrl[channel].rs_control,
2234 (uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
2235 ~(C_RS_RTS | C_RS_DTR)));
2236 retval = cyz_issue_cmd(&cy_card[info->card],
2237 channel, C_CM_IOCTLM, 0L);
2239 printk("cyc:shutdown retval on ttyC%d was %x\n",
2240 info->line, retval);
2243 printk("cyc:shutdown dropping Z DTR\n");
2248 set_bit(TTY_IO_ERROR, &info->tty->flags);
2250 info->flags &= ~ASYNC_INITIALIZED;
2252 CY_UNLOCK(info, flags);
2255 #ifdef CY_DEBUG_OPEN
2256 printk(" cyc shutdown done\n");
2263 * ------------------------------------------------------------
2264 * cy_open() and friends
2265 * ------------------------------------------------------------
2269 block_til_ready(struct tty_struct *tty, struct file * filp,
2270 struct cyclades_port *info)
2272 DECLARE_WAITQUEUE(wait, current);
2273 struct cyclades_card *cinfo;
2274 unsigned long flags;
2275 int chip, channel,index;
2277 void __iomem *base_addr;
2279 cinfo = &cy_card[info->card];
2280 channel = info->line - cinfo->first_line;
2283 * If the device is in the middle of being closed, then block
2284 * until it's done, and then try again.
2286 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2287 if (info->flags & ASYNC_CLOSING) {
2288 interruptible_sleep_on(&info->close_wait);
2290 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2294 * If non-blocking mode is set, then make the check up front
2297 if ((filp->f_flags & O_NONBLOCK) ||
2298 (tty->flags & (1 << TTY_IO_ERROR))) {
2299 info->flags |= ASYNC_NORMAL_ACTIVE;
2304 * Block waiting for the carrier detect and the line to become
2305 * free (i.e., not in use by the callout). While we are in
2306 * this loop, info->count is dropped by one, so that
2307 * cy_close() knows when to free things. We restore it upon
2308 * exit, either normal or abnormal.
2311 add_wait_queue(&info->open_wait, &wait);
2312 #ifdef CY_DEBUG_OPEN
2313 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2314 info->line, info->count);/**/
2316 CY_LOCK(info, flags);
2317 if (!tty_hung_up_p(filp))
2319 CY_UNLOCK(info, flags);
2320 #ifdef CY_DEBUG_COUNT
2321 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2322 current->pid, info->count);
2324 info->blocked_open++;
2326 if (!IS_CYC_Z(*cinfo)) {
2329 index = cinfo->bus_index;
2330 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
2333 CY_LOCK(info, flags);
2334 if ((tty->termios->c_cflag & CBAUD)){
2335 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2336 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
2337 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
2339 printk("cyc:block_til_ready raising DTR\n");
2340 printk(" status: 0x%x, 0x%x\n",
2341 cy_readb(base_addr+(CyMSVR1<<index)),
2342 cy_readb(base_addr+(CyMSVR2<<index)));
2345 CY_UNLOCK(info, flags);
2347 set_current_state(TASK_INTERRUPTIBLE);
2348 if (tty_hung_up_p(filp)
2349 || !(info->flags & ASYNC_INITIALIZED) ){
2350 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2351 -EAGAIN : -ERESTARTSYS);
2355 CY_LOCK(info, flags);
2356 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2357 if (!(info->flags & ASYNC_CLOSING)
2359 || (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
2360 CY_UNLOCK(info, flags);
2363 CY_UNLOCK(info, flags);
2365 if (signal_pending(current)) {
2366 retval = -ERESTARTSYS;
2369 #ifdef CY_DEBUG_OPEN
2370 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2371 info->line, info->count);/**/
2376 struct FIRM_ID __iomem *firm_id;
2377 struct ZFW_CTRL __iomem *zfw_ctrl;
2378 struct BOARD_CTRL __iomem *board_ctrl;
2379 struct CH_CTRL __iomem *ch_ctrl;
2382 base_addr = cinfo->base_addr;
2383 firm_id = base_addr + ID_ADDRESS;
2384 if (!ISZLOADED(*cinfo)){
2385 current->state = TASK_RUNNING;
2386 remove_wait_queue(&info->open_wait, &wait);
2390 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2391 board_ctrl = &zfw_ctrl->board_ctrl;
2392 ch_ctrl = zfw_ctrl->ch_ctrl;
2395 if ((tty->termios->c_cflag & CBAUD)){
2396 cy_writel(&ch_ctrl[channel].rs_control,
2397 cy_readl(&ch_ctrl[channel].rs_control) |
2398 (C_RS_RTS | C_RS_DTR));
2399 retval = cyz_issue_cmd(&cy_card[info->card],
2400 channel, C_CM_IOCTLM, 0L);
2402 printk("cyc:block_til_ready retval on ttyC%d was %x\n",
2403 info->line, retval);
2406 printk("cyc:block_til_ready raising Z DTR\n");
2410 set_current_state(TASK_INTERRUPTIBLE);
2411 if (tty_hung_up_p(filp)
2412 || !(info->flags & ASYNC_INITIALIZED) ){
2413 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2414 -EAGAIN : -ERESTARTSYS);
2417 if (!(info->flags & ASYNC_CLOSING)
2419 || (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
2422 if (signal_pending(current)) {
2423 retval = -ERESTARTSYS;
2426 #ifdef CY_DEBUG_OPEN
2427 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2428 info->line, info->count);/**/
2433 current->state = TASK_RUNNING;
2434 remove_wait_queue(&info->open_wait, &wait);
2435 if (!tty_hung_up_p(filp)){
2437 #ifdef CY_DEBUG_COUNT
2438 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2439 current->pid, info->count);
2442 info->blocked_open--;
2443 #ifdef CY_DEBUG_OPEN
2444 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2445 info->line, info->count);/**/
2449 info->flags |= ASYNC_NORMAL_ACTIVE;
2451 } /* block_til_ready */
2455 * This routine is called whenever a serial port is opened. It
2456 * performs the serial-specific initialization for the tty structure.
2459 cy_open(struct tty_struct *tty, struct file * filp)
2461 struct cyclades_port *info;
2465 if ((line < 0) || (NR_PORTS <= line)){
2468 info = &cy_port[line];
2469 if (info->line < 0){
2473 /* If the card's firmware hasn't been loaded,
2474 treat it as absent from the system. This
2475 will make the user pay attention.
2477 if (IS_CYC_Z(cy_card[info->card])) {
2478 struct cyclades_card *cinfo = &cy_card[info->card];
2479 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2481 if (!ISZLOADED(*cinfo)) {
2482 if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 __iomem *)
2483 (cinfo->ctl_addr))->mail_box_0)) &&
2484 Z_FPGA_CHECK (*cinfo)) &&
2485 (ZFIRM_HLT == cy_readl (&firm_id->signature)))
2487 printk ("cyc:Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
2489 printk("cyc:Cyclades-Z firmware not yet loaded\n");
2493 #ifdef CONFIG_CYZ_INTR
2495 /* In case this Z board is operating in interrupt mode, its
2496 interrupts should be enabled as soon as the first open happens
2497 to one of its ports. */
2498 if (!cinfo->intr_enabled) {
2499 struct ZFW_CTRL __iomem *zfw_ctrl;
2500 struct BOARD_CTRL __iomem *board_ctrl;
2502 zfw_ctrl = cinfo->base_addr + (cy_readl (&firm_id->zfwctrl_addr) & 0xfffff);
2504 board_ctrl = &zfw_ctrl->board_ctrl;
2506 /* Enable interrupts on the PLX chip */
2507 cy_writew(cinfo->ctl_addr+0x68,
2508 cy_readw(cinfo->ctl_addr+0x68)|0x0900);
2509 /* Enable interrupts on the FW */
2510 retval = cyz_issue_cmd(cinfo,
2511 0, C_CM_IRQ_ENBL, 0L);
2513 printk("cyc:IRQ enable retval was %x\n", retval);
2515 cinfo->nports = (int) cy_readl (&board_ctrl->n_channel);
2516 cinfo->intr_enabled = 1;
2519 #endif /* CONFIG_CYZ_INTR */
2520 /* Make sure this Z port really exists in hardware */
2521 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2524 #ifdef CY_DEBUG_OTHER
2525 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2527 tty->driver_data = info;
2529 if (serial_paranoia_check(info, tty->name, "cy_open")){
2532 #ifdef CY_DEBUG_OPEN
2533 printk("cyc:cy_open ttyC%d, count = %d\n",
2534 info->line, info->count);/**/
2537 #ifdef CY_DEBUG_COUNT
2538 printk("cyc:cy_open (%d): incrementing count to %d\n",
2539 current->pid, info->count);
2543 * If the port is the middle of closing, bail out now
2545 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2546 if (info->flags & ASYNC_CLOSING)
2547 interruptible_sleep_on(&info->close_wait);
2548 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2552 * Start up serial port
2554 retval = startup(info);
2559 retval = block_til_ready(tty, filp, info);
2561 #ifdef CY_DEBUG_OPEN
2562 printk("cyc:cy_open returning after block_til_ready with %d\n",
2570 #ifdef CY_DEBUG_OPEN
2571 printk(" cyc:cy_open done\n");/**/
2579 * cy_wait_until_sent() --- wait until the transmitter is empty
2582 cy_wait_until_sent(struct tty_struct *tty, int timeout)
2584 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
2585 void __iomem *base_addr;
2586 int card,chip,channel,index;
2587 unsigned long orig_jiffies;
2590 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2593 if (info->xmit_fifo_size == 0)
2594 return; /* Just in case.... */
2597 orig_jiffies = jiffies;
2599 * Set the check interval to be 1/5 of the estimated time to
2600 * send a single character, and make it at least 1. The check
2601 * interval should also be less than the timeout.
2603 * Note: we have to use pretty tight timings here to satisfy
2606 char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
2607 char_time = char_time / 5;
2613 char_time = min(char_time, timeout);
2615 * If the transmitter hasn't cleared in twice the approximate
2616 * amount of time to send the entire FIFO, it probably won't
2617 * ever clear. This assumes the UART isn't doing flow
2618 * control, which is currently the case. Hence, if it ever
2619 * takes longer than info->timeout, this is probably due to a
2620 * UART bug of some kind. So, we clamp the timeout parameter at
2623 if (!timeout || timeout > 2*info->timeout)
2624 timeout = 2*info->timeout;
2625 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2626 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2627 printk("jiff=%lu...", jiffies);
2630 channel = (info->line) - (cy_card[card].first_line);
2631 if (!IS_CYC_Z(cy_card[card])) {
2634 index = cy_card[card].bus_index;
2635 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2636 while (cy_readb(base_addr+(CySRER<<index)) & CyTxRdy) {
2637 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2638 printk("Not clean (jiff=%lu)...", jiffies);
2640 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2642 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2648 /* Run one more char cycle */
2649 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2650 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2651 printk("Clean (jiff=%lu)...done\n", jiffies);
2656 * This routine is called when a particular tty device is closed.
2659 cy_close(struct tty_struct *tty, struct file *filp)
2661 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2662 unsigned long flags;
2664 #ifdef CY_DEBUG_OTHER
2665 printk("cyc:cy_close ttyC%d\n", info->line);
2668 if (!info || serial_paranoia_check(info, tty->name, "cy_close")){
2672 CY_LOCK(info, flags);
2673 /* If the TTY is being hung up, nothing to do */
2674 if (tty_hung_up_p(filp)) {
2675 CY_UNLOCK(info, flags);
2679 #ifdef CY_DEBUG_OPEN
2680 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2682 if ((tty->count == 1) && (info->count != 1)) {
2684 * Uh, oh. tty->count is 1, which means that the tty
2685 * structure will be freed. Info->count should always
2686 * be one in these conditions. If it's greater than
2687 * one, we've got real problems, since it means the
2688 * serial port won't be shutdown.
2690 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2691 "info->count is %d\n", info->count);
2694 #ifdef CY_DEBUG_COUNT
2695 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2696 current->pid, info->count - 1);
2698 if (--info->count < 0) {
2699 #ifdef CY_DEBUG_COUNT
2700 printk("cyc:cyc_close setting count to 0\n");
2705 CY_UNLOCK(info, flags);
2708 info->flags |= ASYNC_CLOSING;
2711 * Now we wait for the transmit buffer to clear; and we notify
2712 * the line discipline to only process XON/XOFF characters.
2715 CY_UNLOCK(info, flags);
2716 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2717 tty_wait_until_sent(tty, info->closing_wait);
2719 CY_LOCK(info, flags);
2721 if (!IS_CYC_Z(cy_card[info->card])) {
2722 int channel = info->line - cy_card[info->card].first_line;
2723 int index = cy_card[info->card].bus_index;
2724 void __iomem *base_addr = cy_card[info->card].base_addr + (cy_chip_offset[channel>>2] << index);
2725 /* Stop accepting input */
2727 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2728 cy_writeb(base_addr+(CySRER<<index),
2729 cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
2730 if (info->flags & ASYNC_INITIALIZED) {
2731 /* Waiting for on-board buffers to be empty before closing
2733 CY_UNLOCK(info, flags);
2734 cy_wait_until_sent(tty, info->timeout);
2735 CY_LOCK(info, flags);
2739 /* Waiting for on-board buffers to be empty before closing the port */
2740 void __iomem *base_addr = cy_card[info->card].base_addr;
2741 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2742 struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2743 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2744 int channel = info->line - cy_card[info->card].first_line;
2747 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2748 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2751 printk("cyc:cy_close retval on ttyC%d was %x\n",
2752 info->line, retval);
2754 CY_UNLOCK(info, flags);
2755 interruptible_sleep_on(&info->shutdown_wait);
2756 CY_LOCK(info, flags);
2761 CY_UNLOCK(info, flags);
2763 if (tty->driver->flush_buffer)
2764 tty->driver->flush_buffer(tty);
2765 tty_ldisc_flush(tty);
2766 CY_LOCK(info, flags);
2771 if (info->blocked_open) {
2772 CY_UNLOCK(info, flags);
2773 if (info->close_delay) {
2774 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2776 wake_up_interruptible(&info->open_wait);
2777 CY_LOCK(info, flags);
2779 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2780 wake_up_interruptible(&info->close_wait);
2782 #ifdef CY_DEBUG_OTHER
2783 printk(" cyc:cy_close done\n");
2786 CY_UNLOCK(info, flags);
2791 /* This routine gets called when tty_write has put something into
2792 * the write_queue. The characters may come from user space or
2795 * This routine will return the number of characters actually
2796 * accepted for writing.
2798 * If the port is not already transmitting stuff, start it off by
2799 * enabling interrupts. The interrupt service routine will then
2800 * ensure that the characters are sent.
2801 * If the port is already active, there is no need to kick it.
2805 cy_write(struct tty_struct * tty, const unsigned char *buf, int count)
2807 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2808 unsigned long flags;
2812 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2815 if (serial_paranoia_check(info, tty->name, "cy_write")){
2819 if (!info->xmit_buf)
2822 CY_LOCK(info, flags);
2824 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2825 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2830 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2831 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
2832 info->xmit_cnt += c;
2837 CY_UNLOCK(info, flags);
2839 info->idle_stats.xmit_bytes += ret;
2840 info->idle_stats.xmit_idle = jiffies;
2842 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2850 * This routine is called by the kernel to write a single
2851 * character to the tty device. If the kernel uses this routine,
2852 * it must call the flush_chars() routine (if defined) when it is
2853 * done stuffing characters into the driver. If there is no room
2854 * in the queue, the character is ignored.
2857 cy_put_char(struct tty_struct *tty, unsigned char ch)
2859 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2860 unsigned long flags;
2863 printk("cyc:cy_put_char ttyC%d\n", info->line);
2866 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2869 if (!info->xmit_buf)
2872 CY_LOCK(info, flags);
2873 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
2874 CY_UNLOCK(info, flags);
2878 info->xmit_buf[info->xmit_head++] = ch;
2879 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2881 info->idle_stats.xmit_bytes++;
2882 info->idle_stats.xmit_idle = jiffies;
2883 CY_UNLOCK(info, flags);
2888 * This routine is called by the kernel after it has written a
2889 * series of characters to the tty device using put_char().
2892 cy_flush_chars(struct tty_struct *tty)
2894 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2897 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2900 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2903 if (info->xmit_cnt <= 0 || tty->stopped
2904 || tty->hw_stopped || !info->xmit_buf)
2908 } /* cy_flush_chars */
2912 * This routine returns the numbers of characters the tty driver
2913 * will accept for queuing to be written. This number is subject
2914 * to change as output buffers get emptied, or if the output flow
2915 * control is activated.
2918 cy_write_room(struct tty_struct *tty)
2920 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2924 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2927 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2929 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2933 } /* cy_write_room */
2937 cy_chars_in_buffer(struct tty_struct *tty)
2939 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2942 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2946 channel = (info->line) - (cy_card[card].first_line);
2948 #ifdef Z_EXT_CHARS_IN_BUFFER
2949 if (!IS_CYC_Z(cy_card[card])) {
2950 #endif /* Z_EXT_CHARS_IN_BUFFER */
2952 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
2953 info->line, info->xmit_cnt); /* */
2955 return info->xmit_cnt;
2956 #ifdef Z_EXT_CHARS_IN_BUFFER
2958 static volatile struct FIRM_ID *firm_id;
2959 static volatile struct ZFW_CTRL *zfw_ctrl;
2960 static volatile struct CH_CTRL *ch_ctrl;
2961 static volatile struct BUF_CTRL *buf_ctrl;
2963 volatile uclong tx_put, tx_get, tx_bufsize;
2965 firm_id = cy_card[card].base_addr + ID_ADDRESS;
2966 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2967 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2968 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2970 tx_get = cy_readl(&buf_ctrl->tx_get);
2971 tx_put = cy_readl(&buf_ctrl->tx_put);
2972 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
2973 if (tx_put >= tx_get)
2974 char_count = tx_put - tx_get;
2976 char_count = tx_put - tx_get + tx_bufsize;
2978 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
2979 info->line, info->xmit_cnt + char_count); /* */
2981 return (info->xmit_cnt + char_count);
2983 #endif /* Z_EXT_CHARS_IN_BUFFER */
2984 } /* cy_chars_in_buffer */
2988 * ------------------------------------------------------------
2989 * cy_ioctl() and friends
2990 * ------------------------------------------------------------
2994 cyy_baud_calc(struct cyclades_port *info, uclong baud)
2996 int co, co_val, bpr;
2997 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : 25000000);
3000 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3004 /* determine which prescaler to use */
3005 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3006 if (cy_clock / co_val / baud > 63)
3010 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3014 info->tbpr = info->rbpr = bpr;
3015 info->tco = info->rco = co;
3019 * This routine finds or computes the various line characteristics.
3020 * It used to be called config_setup
3023 set_line_char(struct cyclades_port * info)
3025 unsigned long flags;
3026 void __iomem *base_addr;
3027 int card,chip,channel,index;
3028 unsigned cflag, iflag;
3029 unsigned short chip_number;
3030 int baud, baud_rate = 0;
3034 if (!info->tty || !info->tty->termios){
3037 if (info->line == -1){
3040 cflag = info->tty->termios->c_cflag;
3041 iflag = info->tty->termios->c_iflag;
3044 * Set up the tty->alt_speed kludge
3047 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3048 info->tty->alt_speed = 57600;
3049 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3050 info->tty->alt_speed = 115200;
3051 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3052 info->tty->alt_speed = 230400;
3053 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3054 info->tty->alt_speed = 460800;
3058 channel = (info->line) - (cy_card[card].first_line);
3059 chip_number = channel / 4;
3061 if (!IS_CYC_Z(cy_card[card])) {
3063 index = cy_card[card].bus_index;
3066 baud = tty_get_baud_rate(info->tty);
3067 if ((baud == 38400) &&
3068 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3069 if (info->custom_divisor)
3070 baud_rate = info->baud / info->custom_divisor;
3072 baud_rate = info->baud;
3073 } else if (baud > CD1400_MAX_SPEED) {
3074 baud = CD1400_MAX_SPEED;
3076 /* find the baud index */
3077 for (i = 0; i < 20; i++) {
3078 if (baud == baud_table[i]) {
3083 i = 19; /* CD1400_MAX_SPEED */
3086 if ((baud == 38400) &&
3087 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3088 cyy_baud_calc(info, baud_rate);
3090 if(info->chip_rev >= CD1400_REV_J) {
3091 /* It is a CD1400 rev. J or later */
3092 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3093 info->tco = baud_co_60[i]; /* Tx CO */
3094 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3095 info->rco = baud_co_60[i]; /* Rx CO */
3097 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3098 info->tco = baud_co_25[i]; /* Tx CO */
3099 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3100 info->rco = baud_co_25[i]; /* Rx CO */
3103 if (baud_table[i] == 134) {
3104 /* get it right for 134.5 baud */
3105 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3106 } else if ((baud == 38400) &&
3107 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3108 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3109 } else if (baud_table[i]) {
3110 info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
3111 /* this needs to be propagated into the card info */
3115 /* By tradition (is it a standard?) a baud rate of zero
3116 implies the line should be/has been closed. A bit
3117 later in this routine such a test is performed. */
3119 /* byte size and parity */
3122 info->cor3 = (info->default_threshold
3123 ? info->default_threshold
3124 : baud_cor3[i]); /* receive threshold */
3126 switch(cflag & CSIZE){
3128 info->cor1 = Cy_5_BITS;
3131 info->cor1 = Cy_6_BITS;
3134 info->cor1 = Cy_7_BITS;
3137 info->cor1 = Cy_8_BITS;
3141 info->cor1 |= Cy_2_STOP;
3143 if (cflag & PARENB){
3144 if (cflag & PARODD){
3145 info->cor1 |= CyPARITY_O;
3147 info->cor1 |= CyPARITY_E;
3150 info->cor1 |= CyPARITY_NONE;
3153 /* CTS flow control flag */
3154 if (cflag & CRTSCTS){
3155 info->flags |= ASYNC_CTS_FLOW;
3156 info->cor2 |= CyCtsAE;
3158 info->flags &= ~ASYNC_CTS_FLOW;
3159 info->cor2 &= ~CyCtsAE;
3162 info->flags &= ~ASYNC_CHECK_CD;
3164 info->flags |= ASYNC_CHECK_CD;
3166 /***********************************************
3167 The hardware option, CyRtsAO, presents RTS when
3168 the chip has characters to send. Since most modems
3169 use RTS as reverse (inbound) flow control, this
3170 option is not used. If inbound flow control is
3171 necessary, DTR can be programmed to provide the
3172 appropriate signals for use with a non-standard
3173 cable. Contact Marcio Saito for details.
3174 ***********************************************/
3178 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3180 CY_LOCK(info, flags);
3181 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3183 /* tx and rx baud rate */
3185 cy_writeb(base_addr+(CyTCOR<<index), info->tco);
3186 cy_writeb(base_addr+(CyTBPR<<index), info->tbpr);
3187 cy_writeb(base_addr+(CyRCOR<<index), info->rco);
3188 cy_writeb(base_addr+(CyRBPR<<index), info->rbpr);
3190 /* set line characteristics according configuration */
3192 cy_writeb(base_addr+(CySCHR1<<index),
3193 START_CHAR(info->tty));
3194 cy_writeb(base_addr+(CySCHR2<<index),
3195 STOP_CHAR(info->tty));
3196 cy_writeb(base_addr+(CyCOR1<<index), info->cor1);
3197 cy_writeb(base_addr+(CyCOR2<<index), info->cor2);
3198 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3199 cy_writeb(base_addr+(CyCOR4<<index), info->cor4);
3200 cy_writeb(base_addr+(CyCOR5<<index), info->cor5);
3202 cyy_issue_cmd(base_addr,
3203 CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index);
3205 cy_writeb(base_addr+(CyCAR<<index),
3206 (u_char)channel); /* !!! Is this needed? */
3207 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
3208 ? info->default_timeout
3209 : 0x02)); /* 10ms rx timeout */
3211 if (C_CLOCAL(info->tty)) {
3212 /* without modem intr */
3213 cy_writeb(base_addr+(CySRER<<index),
3214 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3215 /* act on 1->0 modem transitions */
3216 if ((cflag & CRTSCTS) && info->rflow) {
3217 cy_writeb(base_addr+(CyMCOR1<<index),
3218 (CyCTS|rflow_thr[i]));
3220 cy_writeb(base_addr+(CyMCOR1<<index), CyCTS);
3222 /* act on 0->1 modem transitions */
3223 cy_writeb(base_addr+(CyMCOR2<<index), CyCTS);
3225 /* without modem intr */
3226 cy_writeb(base_addr+(CySRER<<index),
3227 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3228 /* act on 1->0 modem transitions */
3229 if ((cflag & CRTSCTS) && info->rflow) {
3230 cy_writeb(base_addr+(CyMCOR1<<index),
3231 (CyDSR|CyCTS|CyRI|CyDCD|rflow_thr[i]));
3233 cy_writeb(base_addr+(CyMCOR1<<index),
3234 CyDSR|CyCTS|CyRI|CyDCD);
3236 /* act on 0->1 modem transitions */
3237 cy_writeb(base_addr+(CyMCOR2<<index),
3238 CyDSR|CyCTS|CyRI|CyDCD);
3241 if(i == 0){ /* baud rate is zero, turn off line */
3242 if (info->rtsdtr_inv) {
3243 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3245 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3248 printk("cyc:set_line_char dropping DTR\n");
3249 printk(" status: 0x%x, 0x%x\n",
3250 cy_readb(base_addr+(CyMSVR1<<index)),
3251 cy_readb(base_addr+(CyMSVR2<<index)));
3254 if (info->rtsdtr_inv) {
3255 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3257 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3260 printk("cyc:set_line_char raising DTR\n");
3261 printk(" status: 0x%x, 0x%x\n",
3262 cy_readb(base_addr+(CyMSVR1<<index)),
3263 cy_readb(base_addr+(CyMSVR2<<index)));
3268 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3270 CY_UNLOCK(info, flags);
3273 struct FIRM_ID __iomem *firm_id;
3274 struct ZFW_CTRL __iomem *zfw_ctrl;
3275 struct BOARD_CTRL __iomem *board_ctrl;
3276 struct CH_CTRL __iomem *ch_ctrl;
3277 struct BUF_CTRL __iomem *buf_ctrl;
3281 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3282 if (!ISZLOADED(cy_card[card])) {
3286 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3287 board_ctrl = &zfw_ctrl->board_ctrl;
3288 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3289 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3292 baud = tty_get_baud_rate(info->tty);
3293 if ((baud == 38400) &&
3294 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3295 if (info->custom_divisor)
3296 baud_rate = info->baud / info->custom_divisor;
3298 baud_rate = info->baud;
3299 } else if (baud > CYZ_MAX_SPEED) {
3300 baud = CYZ_MAX_SPEED;
3302 cy_writel(&ch_ctrl->comm_baud , baud);
3305 /* get it right for 134.5 baud */
3306 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3307 } else if ((baud == 38400) &&
3308 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3309 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3311 info->timeout = (info->xmit_fifo_size*HZ*15/baud) + 2;
3312 /* this needs to be propagated into the card info */
3317 /* byte size and parity */
3318 switch(cflag & CSIZE){
3319 case CS5: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS5); break;
3320 case CS6: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS6); break;
3321 case CS7: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS7); break;
3322 case CS8: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS8); break;
3325 cy_writel(&ch_ctrl->comm_data_l,
3326 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3328 cy_writel(&ch_ctrl->comm_data_l,
3329 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3331 if (cflag & PARENB){
3332 if (cflag & PARODD){
3333 cy_writel(&ch_ctrl->comm_parity , C_PR_ODD);
3335 cy_writel(&ch_ctrl->comm_parity , C_PR_EVEN);
3338 cy_writel(&ch_ctrl->comm_parity , C_PR_NONE);
3341 /* CTS flow control flag */
3342 if (cflag & CRTSCTS){
3343 cy_writel(&ch_ctrl->hw_flow,
3344 cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3346 cy_writel(&ch_ctrl->hw_flow,
3347 cy_readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3349 /* As the HW flow control is done in firmware, the driver doesn't
3350 need to care about it */
3351 info->flags &= ~ASYNC_CTS_FLOW;
3353 /* XON/XOFF/XANY flow control flags */
3356 sw_flow |= C_FL_OXX;
3358 sw_flow |= C_FL_OIXANY;
3360 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3362 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3364 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3365 info->line, retval);
3368 /* CD sensitivity */
3369 if (cflag & CLOCAL){
3370 info->flags &= ~ASYNC_CHECK_CD;
3372 info->flags |= ASYNC_CHECK_CD;
3375 if(baud == 0){ /* baud rate is zero, turn off line */
3376 cy_writel(&ch_ctrl->rs_control,
3377 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3379 printk("cyc:set_line_char dropping Z DTR\n");
3382 cy_writel(&ch_ctrl->rs_control,
3383 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3385 printk("cyc:set_line_char raising Z DTR\n");
3389 retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
3391 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3392 info->line, retval);
3396 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3399 } /* set_line_char */
3403 get_serial_info(struct cyclades_port * info,
3404 struct serial_struct __user * retinfo)
3406 struct serial_struct tmp;
3407 struct cyclades_card *cinfo = &cy_card[info->card];
3411 memset(&tmp, 0, sizeof(tmp));
3412 tmp.type = info->type;
3413 tmp.line = info->line;
3414 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3415 tmp.irq = cinfo->irq;
3416 tmp.flags = info->flags;
3417 tmp.close_delay = info->close_delay;
3418 tmp.baud_base = info->baud;
3419 tmp.custom_divisor = info->custom_divisor;
3420 tmp.hub6 = 0; /*!!!*/
3421 return copy_to_user(retinfo,&tmp,sizeof(*retinfo))?-EFAULT:0;
3422 } /* get_serial_info */
3426 set_serial_info(struct cyclades_port * info,
3427 struct serial_struct __user * new_info)
3429 struct serial_struct new_serial;
3430 struct cyclades_port old_info;
3432 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
3436 if (!capable(CAP_SYS_ADMIN)) {
3437 if ((new_serial.close_delay != info->close_delay) ||
3438 (new_serial.baud_base != info->baud) ||
3439 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
3440 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
3442 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
3443 (new_serial.flags & ASYNC_USR_MASK));
3444 info->baud = new_serial.baud_base;
3445 info->custom_divisor = new_serial.custom_divisor;
3446 goto check_and_exit;
3451 * OK, past this point, all the error checking has been done.
3452 * At this point, we start making changes.....
3455 info->baud = new_serial.baud_base;
3456 info->custom_divisor = new_serial.custom_divisor;
3457 info->flags = ((info->flags & ~ASYNC_FLAGS) |
3458 (new_serial.flags & ASYNC_FLAGS));
3459 info->close_delay = new_serial.close_delay * HZ/100;
3460 info->closing_wait = new_serial.closing_wait * HZ/100;
3463 if (info->flags & ASYNC_INITIALIZED){
3464 set_line_char(info);
3467 return startup(info);
3469 } /* set_serial_info */
3472 * get_lsr_info - get line status register info
3474 * Purpose: Let user call ioctl() to get info when the UART physically
3475 * is emptied. On bus types like RS485, the transmitter must
3476 * release the bus after transmitting. This must be done when
3477 * the transmit shift register is empty, not be done when the
3478 * transmit holding register is empty. This functionality
3479 * allows an RS485 driver to be written in user space.
3481 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3483 int card, chip, channel, index;
3484 unsigned char status;
3485 unsigned int result;
3486 unsigned long flags;
3487 void __iomem *base_addr;
3490 channel = (info->line) - (cy_card[card].first_line);
3491 if (!IS_CYC_Z(cy_card[card])) {
3494 index = cy_card[card].bus_index;
3495 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3497 CY_LOCK(info, flags);
3498 status = cy_readb(base_addr+(CySRER<<index)) & (CyTxRdy|CyTxMpty);
3499 CY_UNLOCK(info, flags);
3500 result = (status ? 0 : TIOCSER_TEMT);
3502 /* Not supported yet */
3505 return put_user(result, (unsigned long __user *) value);
3509 cy_tiocmget(struct tty_struct *tty, struct file *file)
3511 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3512 int card,chip,channel,index;
3513 void __iomem *base_addr;
3514 unsigned long flags;
3515 unsigned char status;
3516 unsigned long lstatus;
3517 unsigned int result;
3518 struct FIRM_ID __iomem *firm_id;
3519 struct ZFW_CTRL __iomem *zfw_ctrl;
3520 struct BOARD_CTRL __iomem *board_ctrl;
3521 struct CH_CTRL __iomem *ch_ctrl;
3523 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3527 channel = (info->line) - (cy_card[card].first_line);
3528 if (!IS_CYC_Z(cy_card[card])) {
3531 index = cy_card[card].bus_index;
3532 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3534 CY_LOCK(info, flags);
3535 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3536 status = cy_readb(base_addr+(CyMSVR1<<index));
3537 status |= cy_readb(base_addr+(CyMSVR2<<index));
3538 CY_UNLOCK(info, flags);
3540 if (info->rtsdtr_inv) {
3541 result = ((status & CyRTS) ? TIOCM_DTR : 0)
3542 | ((status & CyDTR) ? TIOCM_RTS : 0);
3544 result = ((status & CyRTS) ? TIOCM_RTS : 0)
3545 | ((status & CyDTR) ? TIOCM_DTR : 0);
3547 result |= ((status & CyDCD) ? TIOCM_CAR : 0)
3548 | ((status & CyRI) ? TIOCM_RNG : 0)
3549 | ((status & CyDSR) ? TIOCM_DSR : 0)
3550 | ((status & CyCTS) ? TIOCM_CTS : 0);
3552 base_addr = cy_card[card].base_addr;
3554 if (cy_card[card].num_chips != -1){
3558 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3559 if (ISZLOADED(cy_card[card])) {
3560 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3561 board_ctrl = &zfw_ctrl->board_ctrl;
3562 ch_ctrl = zfw_ctrl->ch_ctrl;
3563 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3564 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0)
3565 | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0)
3566 | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0)
3567 | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0)
3568 | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0)
3569 | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3581 cy_tiocmset(struct tty_struct *tty, struct file *file,
3582 unsigned int set, unsigned int clear)
3584 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3585 int card,chip,channel,index;
3586 void __iomem *base_addr;
3587 unsigned long flags;
3588 struct FIRM_ID __iomem *firm_id;
3589 struct ZFW_CTRL __iomem *zfw_ctrl;
3590 struct BOARD_CTRL __iomem *board_ctrl;
3591 struct CH_CTRL __iomem *ch_ctrl;
3594 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3598 channel = (info->line) - (cy_card[card].first_line);
3599 if (!IS_CYC_Z(cy_card[card])) {
3602 index = cy_card[card].bus_index;
3603 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3605 if (set & TIOCM_RTS){
3606 CY_LOCK(info, flags);
3607 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3608 if (info->rtsdtr_inv) {
3609 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3611 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3613 CY_UNLOCK(info, flags);
3615 if (clear & TIOCM_RTS) {
3616 CY_LOCK(info, flags);
3617 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3618 if (info->rtsdtr_inv) {
3619 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3621 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3623 CY_UNLOCK(info, flags);
3625 if (set & TIOCM_DTR){
3626 CY_LOCK(info, flags);
3627 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3628 if (info->rtsdtr_inv) {
3629 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3631 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3634 printk("cyc:set_modem_info raising DTR\n");
3635 printk(" status: 0x%x, 0x%x\n",
3636 cy_readb(base_addr+(CyMSVR1<<index)),
3637 cy_readb(base_addr+(CyMSVR2<<index)));
3639 CY_UNLOCK(info, flags);
3641 if (clear & TIOCM_DTR) {
3642 CY_LOCK(info, flags);
3643 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3644 if (info->rtsdtr_inv) {
3645 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3647 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3651 printk("cyc:set_modem_info dropping DTR\n");
3652 printk(" status: 0x%x, 0x%x\n",
3653 cy_readb(base_addr+(CyMSVR1<<index)),
3654 cy_readb(base_addr+(CyMSVR2<<index)));
3656 CY_UNLOCK(info, flags);
3659 base_addr = cy_card[card].base_addr;
3661 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3662 if (ISZLOADED(cy_card[card])) {
3663 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3664 board_ctrl = &zfw_ctrl->board_ctrl;
3665 ch_ctrl = zfw_ctrl->ch_ctrl;
3667 if (set & TIOCM_RTS){
3668 CY_LOCK(info, flags);
3669 cy_writel(&ch_ctrl[channel].rs_control,
3670 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
3671 CY_UNLOCK(info, flags);
3673 if (clear & TIOCM_RTS) {
3674 CY_LOCK(info, flags);
3675 cy_writel(&ch_ctrl[channel].rs_control,
3676 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
3677 CY_UNLOCK(info, flags);
3679 if (set & TIOCM_DTR){
3680 CY_LOCK(info, flags);
3681 cy_writel(&ch_ctrl[channel].rs_control,
3682 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
3684 printk("cyc:set_modem_info raising Z DTR\n");
3686 CY_UNLOCK(info, flags);
3688 if (clear & TIOCM_DTR) {
3689 CY_LOCK(info, flags);
3690 cy_writel(&ch_ctrl[channel].rs_control,
3691 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
3693 printk("cyc:set_modem_info clearing Z DTR\n");
3695 CY_UNLOCK(info, flags);
3700 CY_LOCK(info, flags);
3701 retval = cyz_issue_cmd(&cy_card[info->card],
3702 channel, C_CM_IOCTLM,0L);
3704 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3705 info->line, retval);
3707 CY_UNLOCK(info, flags);
3713 * cy_break() --- routine which turns the break handling on or off
3716 cy_break(struct tty_struct *tty, int break_state)
3718 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3719 unsigned long flags;
3721 if (serial_paranoia_check(info, tty->name, "cy_break"))
3724 CY_LOCK(info, flags);
3725 if (!IS_CYC_Z(cy_card[info->card])) {
3726 /* Let the transmit ISR take care of this (since it
3727 requires stuffing characters into the output stream).
3729 if (break_state == -1) {
3730 if (!info->breakon) {
3732 if (!info->xmit_cnt) {
3733 CY_UNLOCK(info, flags);
3735 CY_LOCK(info, flags);
3739 if (!info->breakoff) {
3741 if (!info->xmit_cnt) {
3742 CY_UNLOCK(info, flags);
3744 CY_LOCK(info, flags);
3751 if (break_state == -1) {
3752 retval = cyz_issue_cmd(&cy_card[info->card],
3753 (info->line) - (cy_card[info->card].first_line),
3754 C_CM_SET_BREAK, 0L);
3756 printk("cyc:cy_break (set) retval on ttyC%d was %x\n",
3757 info->line, retval);
3760 retval = cyz_issue_cmd(&cy_card[info->card],
3761 (info->line) - (cy_card[info->card].first_line),
3762 C_CM_CLR_BREAK, 0L);
3764 printk("cyc:cy_break (clr) retval on ttyC%d was %x\n",
3765 info->line, retval);
3769 CY_UNLOCK(info, flags);
3773 get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon)
3776 if(copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3778 info->mon.int_count = 0;
3779 info->mon.char_count = 0;
3780 info->mon.char_max = 0;
3781 info->mon.char_last = 0;
3787 set_threshold(struct cyclades_port * info, unsigned long value)
3789 void __iomem *base_addr;
3790 int card,channel,chip,index;
3791 unsigned long flags;
3794 channel = info->line - cy_card[card].first_line;
3795 if (!IS_CYC_Z(cy_card[card])) {
3798 index = cy_card[card].bus_index;
3799 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3801 info->cor3 &= ~CyREC_FIFO;
3802 info->cor3 |= value & CyREC_FIFO;
3804 CY_LOCK(info, flags);
3805 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3806 cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
3807 CY_UNLOCK(info, flags);
3812 }/* set_threshold */
3816 get_threshold(struct cyclades_port * info, unsigned long __user *value)
3818 void __iomem *base_addr;
3819 int card,channel,chip,index;
3823 channel = info->line - cy_card[card].first_line;
3824 if (!IS_CYC_Z(cy_card[card])) {
3827 index = cy_card[card].bus_index;
3828 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3830 tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
3831 return put_user(tmp,value);
3836 }/* get_threshold */
3840 set_default_threshold(struct cyclades_port * info, unsigned long value)
3842 info->default_threshold = value & 0x0f;
3844 }/* set_default_threshold */
3848 get_default_threshold(struct cyclades_port * info, unsigned long __user *value)
3850 return put_user(info->default_threshold,value);
3851 }/* get_default_threshold */
3855 set_timeout(struct cyclades_port * info, unsigned long value)
3857 void __iomem *base_addr;
3858 int card,channel,chip,index;
3859 unsigned long flags;
3862 channel = info->line - cy_card[card].first_line;
3863 if (!IS_CYC_Z(cy_card[card])) {
3866 index = cy_card[card].bus_index;
3867 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3869 CY_LOCK(info, flags);
3870 cy_writeb(base_addr+(CyRTPR<<index), value & 0xff);
3871 CY_UNLOCK(info, flags);
3880 get_timeout(struct cyclades_port * info, unsigned long __user *value)
3882 void __iomem *base_addr;
3883 int card,channel,chip,index;
3887 channel = info->line - cy_card[card].first_line;
3888 if (!IS_CYC_Z(cy_card[card])) {
3891 index = cy_card[card].bus_index;
3892 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3894 tmp = cy_readb(base_addr+(CyRTPR<<index));
3895 return put_user(tmp,value);
3904 set_default_timeout(struct cyclades_port * info, unsigned long value)
3906 info->default_timeout = value & 0xff;
3908 }/* set_default_timeout */
3912 get_default_timeout(struct cyclades_port * info, unsigned long __user *value)
3914 return put_user(info->default_timeout,value);
3915 }/* get_default_timeout */
3918 * This routine allows the tty driver to implement device-
3919 * specific ioctl's. If the ioctl number passed in cmd is
3920 * not recognized by the driver, it should return ENOIOCTLCMD.
3923 cy_ioctl(struct tty_struct *tty, struct file * file,
3924 unsigned int cmd, unsigned long arg)
3926 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3927 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3928 struct serial_icounter_struct __user *p_cuser; /* user space */
3930 unsigned long flags;
3931 void __user *argp = (void __user *)arg;
3933 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3936 #ifdef CY_DEBUG_OTHER
3937 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3938 info->line, cmd, arg); /* */
3943 ret_val = get_mon_info(info, argp);
3946 ret_val = get_threshold(info, argp);
3949 ret_val = set_threshold(info, arg);
3951 case CYGETDEFTHRESH:
3952 ret_val = get_default_threshold(info, argp);
3954 case CYSETDEFTHRESH:
3955 ret_val = set_default_threshold(info, arg);
3958 ret_val = get_timeout(info, argp);
3961 ret_val = set_timeout(info, arg);
3963 case CYGETDEFTIMEOUT:
3964 ret_val = get_default_timeout(info, argp);
3966 case CYSETDEFTIMEOUT:
3967 ret_val = set_default_timeout(info, arg);
3970 info->rflow = (int)arg;
3974 ret_val = info->rflow;
3976 case CYSETRTSDTR_INV:
3977 info->rtsdtr_inv = (int)arg;
3980 case CYGETRTSDTR_INV:
3981 ret_val = info->rtsdtr_inv;
3984 if (copy_to_user(argp, &cy_card[info->card],
3985 sizeof (struct cyclades_card))) {
3991 case CYGETCD1400VER:
3992 ret_val = info->chip_rev;
3994 #ifndef CONFIG_CYZ_INTR
3995 case CYZSETPOLLCYCLE:
3996 cyz_polling_cycle = (arg * HZ) / 1000;
3999 case CYZGETPOLLCYCLE:
4000 ret_val = (cyz_polling_cycle * 1000) / HZ;
4002 #endif /* CONFIG_CYZ_INTR */
4004 info->closing_wait = (unsigned short)arg * HZ/100;
4008 ret_val = info->closing_wait / (HZ/100);
4011 ret_val = get_serial_info(info, argp);
4014 ret_val = set_serial_info(info, argp);
4016 case TIOCSERGETLSR: /* Get line status register */
4017 ret_val = get_lsr_info(info, argp);
4020 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4021 * - mask passed in arg for lines of interest
4022 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4023 * Caller should use TIOCGICOUNT to see which one it was
4026 CY_LOCK(info, flags);
4027 /* note the counters on entry */
4028 cprev = info->icount;
4029 CY_UNLOCK(info, flags);
4031 interruptible_sleep_on(&info->delta_msr_wait);
4032 /* see if a signal did it */
4033 if (signal_pending(current)) {
4034 return -ERESTARTSYS;
4037 CY_LOCK(info, flags);
4038 cnow = info->icount; /* atomic copy */
4039 CY_UNLOCK(info, flags);
4041 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4042 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4043 return -EIO; /* no change => error */
4045 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4046 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4047 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4048 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
4056 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4057 * Return: write counters to the user passed counter struct
4058 * NB: both 1->0 and 0->1 transitions are counted except for
4059 * RI where only 0->1 is counted.
4062 CY_LOCK(info, flags);
4063 cnow = info->icount;
4064 CY_UNLOCK(info, flags);
4066 ret_val = put_user(cnow.cts, &p_cuser->cts);
4067 if (ret_val) return ret_val;
4068 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4069 if (ret_val) return ret_val;
4070 ret_val = put_user(cnow.rng, &p_cuser->rng);
4071 if (ret_val) return ret_val;
4072 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4073 if (ret_val) return ret_val;
4074 ret_val = put_user(cnow.rx, &p_cuser->rx);
4075 if (ret_val) return ret_val;
4076 ret_val = put_user(cnow.tx, &p_cuser->tx);
4077 if (ret_val) return ret_val;
4078 ret_val = put_user(cnow.frame, &p_cuser->frame);
4079 if (ret_val) return ret_val;
4080 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4081 if (ret_val) return ret_val;
4082 ret_val = put_user(cnow.parity, &p_cuser->parity);
4083 if (ret_val) return ret_val;
4084 ret_val = put_user(cnow.brk, &p_cuser->brk);
4085 if (ret_val) return ret_val;
4086 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4087 if (ret_val) return ret_val;
4091 ret_val = -ENOIOCTLCMD;
4094 #ifdef CY_DEBUG_OTHER
4095 printk(" cyc:cy_ioctl done\n");
4103 * This routine allows the tty driver to be notified when
4104 * device's termios settings have changed. Note that a
4105 * well-designed tty driver should be prepared to accept the case
4106 * where old == NULL, and try to do something rational.
4109 cy_set_termios(struct tty_struct *tty, struct ktermios * old_termios)
4111 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4113 #ifdef CY_DEBUG_OTHER
4114 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4117 if ((tty->termios->c_cflag == old_termios->c_cflag) &&
4118 ((tty->termios->c_iflag & (IXON|IXANY)) ==
4119 (old_termios->c_iflag & (IXON|IXANY))))
4121 set_line_char(info);
4123 if ((old_termios->c_cflag & CRTSCTS) &&
4124 !(tty->termios->c_cflag & CRTSCTS)) {
4125 tty->hw_stopped = 0;
4130 * No need to wake up processes in open wait, since they
4131 * sample the CLOCAL flag once, and don't recheck it.
4132 * XXX It's not clear whether the current behavior is correct
4133 * or not. Hence, this may change.....
4135 if (!(old_termios->c_cflag & CLOCAL) &&
4136 (tty->termios->c_cflag & CLOCAL))
4137 wake_up_interruptible(&info->open_wait);
4141 } /* cy_set_termios */
4143 /* This function is used to send a high-priority XON/XOFF character to
4147 cy_send_xchar (struct tty_struct *tty, char ch)
4149 struct cyclades_port *info = (struct cyclades_port *) tty->driver_data;
4152 if (serial_paranoia_check (info, tty->name, "cy_send_xchar"))
4161 channel = info->line - cy_card[card].first_line;
4163 if (IS_CYC_Z (cy_card[card])) {
4164 if (ch == STOP_CHAR (tty))
4165 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXOFF, 0L);
4166 else if (ch == START_CHAR (tty))
4167 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXON, 0L);
4171 /* This routine is called by the upper-layer tty layer to signal
4172 that incoming characters should be throttled because the input
4173 buffers are close to full.
4176 cy_throttle(struct tty_struct * tty)
4178 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4179 unsigned long flags;
4180 void __iomem *base_addr;
4181 int card,chip,channel,index;
4183 #ifdef CY_DEBUG_THROTTLE
4186 printk("cyc:throttle %s: %d....ttyC%d\n",
4188 tty->ldisc.chars_in_buffer(tty), info->line);
4191 if (serial_paranoia_check(info, tty->name, "cy_throttle")){
4198 if (!IS_CYC_Z (cy_card[card]))
4199 cy_send_xchar (tty, STOP_CHAR (tty));
4204 if (tty->termios->c_cflag & CRTSCTS) {
4205 channel = info->line - cy_card[card].first_line;
4206 if (!IS_CYC_Z(cy_card[card])) {
4209 index = cy_card[card].bus_index;
4210 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4212 CY_LOCK(info, flags);
4213 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4214 if (info->rtsdtr_inv) {
4215 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
4217 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
4219 CY_UNLOCK(info, flags);
4230 * This routine notifies the tty driver that it should signal
4231 * that characters can now be sent to the tty without fear of
4232 * overrunning the input buffers of the line disciplines.
4235 cy_unthrottle(struct tty_struct * tty)
4237 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4238 unsigned long flags;
4239 void __iomem *base_addr;
4240 int card,chip,channel,index;
4242 #ifdef CY_DEBUG_THROTTLE
4245 printk("cyc:unthrottle %s: %d....ttyC%d\n",
4247 tty->ldisc.chars_in_buffer(tty), info->line);
4250 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")){
4258 cy_send_xchar (tty, START_CHAR (tty));
4261 if (tty->termios->c_cflag & CRTSCTS) {
4263 channel = info->line - cy_card[card].first_line;
4264 if (!IS_CYC_Z(cy_card[card])) {
4267 index = cy_card[card].bus_index;
4268 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4270 CY_LOCK(info, flags);
4271 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4272 if (info->rtsdtr_inv) {
4273 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
4275 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
4277 CY_UNLOCK(info, flags);
4284 } /* cy_unthrottle */
4287 /* cy_start and cy_stop provide software output flow control as a
4288 function of XON/XOFF, software CTS, and other such stuff.
4291 cy_stop(struct tty_struct *tty)
4293 struct cyclades_card *cinfo;
4294 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4295 void __iomem *base_addr;
4296 int chip,channel,index;
4297 unsigned long flags;
4299 #ifdef CY_DEBUG_OTHER
4300 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4303 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4306 cinfo = &cy_card[info->card];
4307 channel = info->line - cinfo->first_line;
4308 if (!IS_CYC_Z(*cinfo)) {
4309 index = cinfo->bus_index;
4312 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4314 CY_LOCK(info, flags);
4315 cy_writeb(base_addr+(CyCAR<<index),
4316 (u_char)(channel & 0x0003)); /* index channel */
4317 cy_writeb(base_addr+(CySRER<<index),
4318 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
4319 CY_UNLOCK(info, flags);
4329 cy_start(struct tty_struct *tty)
4331 struct cyclades_card *cinfo;
4332 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4333 void __iomem *base_addr;
4334 int chip,channel,index;
4335 unsigned long flags;
4337 #ifdef CY_DEBUG_OTHER
4338 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4341 if (serial_paranoia_check(info, tty->name, "cy_start"))
4344 cinfo = &cy_card[info->card];
4345 channel = info->line - cinfo->first_line;
4346 index = cinfo->bus_index;
4347 if (!IS_CYC_Z(*cinfo)) {
4350 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4352 CY_LOCK(info, flags);
4353 cy_writeb(base_addr+(CyCAR<<index),
4354 (u_char)(channel & 0x0003)); /* index channel */
4355 cy_writeb(base_addr+(CySRER<<index),
4356 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
4357 CY_UNLOCK(info, flags);
4367 cy_flush_buffer(struct tty_struct *tty)
4369 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4370 int card, channel, retval;
4371 unsigned long flags;
4374 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4377 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4381 channel = (info->line) - (cy_card[card].first_line);
4383 CY_LOCK(info, flags);
4384 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4385 CY_UNLOCK(info, flags);
4387 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4389 CY_LOCK(info, flags);
4390 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4392 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4393 info->line, retval);
4395 CY_UNLOCK(info, flags);
4398 wake_up_interruptible(&tty->write_wait);
4399 } /* cy_flush_buffer */
4403 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4406 cy_hangup(struct tty_struct *tty)
4408 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
4410 #ifdef CY_DEBUG_OTHER
4411 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4414 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4417 cy_flush_buffer(tty);
4421 #ifdef CY_DEBUG_COUNT
4422 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4425 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4426 wake_up_interruptible(&info->open_wait);
4431 * ---------------------------------------------------------------------
4432 * cy_init() and friends
4434 * cy_init() is called at boot-time to initialize the serial driver.
4435 * ---------------------------------------------------------------------
4438 /* initialize chips on Cyclom-Y card -- return number of valid
4439 chips (which is number of ports/4) */
4440 static unsigned short __init
4441 cyy_init_card(void __iomem *true_base_addr,int index)
4443 unsigned int chip_number;
4444 void __iomem *base_addr;
4446 cy_writeb(true_base_addr+(Cy_HwReset<<index), 0);
4447 /* Cy_HwReset is 0x1400 */
4448 cy_writeb(true_base_addr+(Cy_ClrIntr<<index), 0);
4449 /* Cy_ClrIntr is 0x1800 */
4452 for(chip_number=0; chip_number<CyMAX_CHIPS_PER_CARD; chip_number++){
4453 base_addr = true_base_addr + (cy_chip_offset[chip_number]<<index);
4455 if(cy_readb(base_addr+(CyCCR<<index)) != 0x00){
4457 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4458 chip_number, (unsigned long)base_addr);
4463 cy_writeb(base_addr+(CyGFRCR<<index), 0);
4466 /* The Cyclom-16Y does not decode address bit 9 and therefore
4467 cannot distinguish between references to chip 0 and a non-
4468 existent chip 4. If the preceding clearing of the supposed
4469 chip 4 GFRCR register appears at chip 0, there is no chip 4
4470 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4472 if (chip_number == 4
4473 && cy_readb(true_base_addr
4474 + (cy_chip_offset[0]<<index)
4475 + (CyGFRCR<<index)) == 0){
4479 cy_writeb(base_addr+(CyCCR<<index), CyCHIP_RESET);
4482 if(cy_readb(base_addr+(CyGFRCR<<index)) == 0x00){
4484 printk(" chip #%d at %#6lx is not responding ",
4485 chip_number, (unsigned long)base_addr);
4486 printk("(GFRCR stayed 0)\n",
4490 if((0xf0 & (cy_readb(base_addr+(CyGFRCR<<index)))) != 0x40){
4492 printk(" chip #%d at %#6lx is not valid (GFRCR == %#2x)\n",
4493 chip_number, (unsigned long)base_addr,
4494 base_addr[CyGFRCR<<index]);
4498 cy_writeb(base_addr+(CyGCR<<index), CyCH0_SERIAL);
4499 if (cy_readb(base_addr+(CyGFRCR<<index)) >= CD1400_REV_J){
4500 /* It is a CD1400 rev. J or later */
4501 /* Impossible to reach 5ms with this chip.
4502 Changed to 2ms instead (f = 500 Hz). */
4503 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_60_2MS);
4506 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_25_5MS);
4510 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4511 chip_number, (unsigned long)base_addr,
4512 cy_readb(base_addr+(CyGFRCR<<index)));
4516 } /* cyy_init_card */
4519 * ---------------------------------------------------------------------
4520 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4521 * sets global variables and return the number of ISA boards found.
4522 * ---------------------------------------------------------------------
4528 unsigned short cy_isa_irq,nboard;
4529 void __iomem *cy_isa_address;
4530 unsigned short i,j,cy_isa_nchan;
4538 /* Check for module parameters */
4539 for(i = 0 ; i < NR_CARDS; i++) {
4540 if (maddr[i] || i) {
4542 cy_isa_addresses[i] = maddr[i];
4549 /* scan the address table probing for Cyclom-Y/ISA boards */
4550 for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
4551 unsigned int isa_address = cy_isa_addresses[i];
4552 if (isa_address == 0x0000) {
4556 /* probe for CD1400... */
4557 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4558 cy_isa_nchan = CyPORTS_PER_CHIP *
4559 cyy_init_card(cy_isa_address,0);
4560 if (cy_isa_nchan == 0) {
4565 if (isparam && irq[i])
4566 cy_isa_irq = irq[i];
4569 /* find out the board's irq by probing */
4570 cy_isa_irq = detect_isa_irq(cy_isa_address);
4571 if (cy_isa_irq == 0) {
4572 printk("Cyclom-Y/ISA found at 0x%lx ",
4573 (unsigned long) cy_isa_address);
4574 printk("but the IRQ could not be detected.\n");
4578 if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
4579 printk("Cyclom-Y/ISA found at 0x%lx ",
4580 (unsigned long) cy_isa_address);
4581 printk("but no more channels are available.\n");
4582 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4585 /* fill the next cy_card structure available */
4586 for (j = 0 ; j < NR_CARDS ; j++) {
4587 if (cy_card[j].base_addr == 0) break;
4589 if (j == NR_CARDS) { /* no more cy_cards available */
4590 printk("Cyclom-Y/ISA found at 0x%lx ",
4591 (unsigned long) cy_isa_address);
4592 printk("but no more cards can be used .\n");
4593 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4598 if(request_irq(cy_isa_irq, cyy_interrupt,
4599 IRQF_DISABLED, "Cyclom-Y", &cy_card[j]))
4601 printk("Cyclom-Y/ISA found at 0x%lx ",
4602 (unsigned long) cy_isa_address);
4603 printk("but could not allocate IRQ#%d.\n",
4609 cy_card[j].base_addr = cy_isa_address;
4610 cy_card[j].ctl_addr = NULL;
4611 cy_card[j].irq = (int) cy_isa_irq;
4612 cy_card[j].bus_index = 0;
4613 cy_card[j].first_line = cy_next_channel;
4614 cy_card[j].num_chips = cy_isa_nchan/4;
4618 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4619 j+1, (unsigned long) cy_isa_address,
4620 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4622 printk("%d channels starting from port %d.\n",
4623 cy_isa_nchan, cy_next_channel);
4624 cy_next_channel += cy_isa_nchan;
4629 #endif /* CONFIG_ISA */
4630 } /* cy_detect_isa */
4633 plx_init(void __iomem *addr, uclong initctl)
4636 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4638 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4640 /* Reload Config. Registers from EEPROM */
4641 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4643 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4647 * ---------------------------------------------------------------------
4648 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4649 * sets global variables and return the number of PCI boards found.
4650 * ---------------------------------------------------------------------
4657 struct pci_dev *pdev = NULL;
4658 unsigned char cyy_rev_id;
4659 unsigned char cy_pci_irq = 0;
4660 uclong cy_pci_phys0, cy_pci_phys2;
4661 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4662 unsigned short i,j,cy_pci_nchan, plx_ver;
4663 unsigned short device_id,dev_index = 0;
4666 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4667 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4668 unsigned char Ze_irq[NR_CARDS];
4669 struct pci_dev *Ze_pdev[NR_CARDS];
4671 for (i = 0; i < NR_CARDS; i++) {
4672 /* look for a Cyclades card by vendor and device id */
4673 while((device_id = cy_pci_dev_id[dev_index]) != 0) {
4674 if((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4675 device_id, pdev)) == NULL) {
4676 dev_index++; /* try next device id */
4678 break; /* found a board */
4685 if (pci_enable_device(pdev))
4688 /* read PCI configuration area */
4689 cy_pci_irq = pdev->irq;
4690 cy_pci_phys0 = pci_resource_start(pdev, 0);
4691 cy_pci_phys2 = pci_resource_start(pdev, 2);
4692 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4694 device_id &= ~PCI_DEVICE_ID_MASK;
4696 if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
4697 || (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
4699 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4700 pdev->bus->number, pdev->devfn);
4701 printk("rev_id=%d) IRQ%d\n",
4702 cyy_rev_id, (int)cy_pci_irq);
4703 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4704 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4707 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4708 printk(" Warning: PCI I/O bit incorrectly set. "
4709 "Ignoring it...\n");
4710 pdev->resource[2].flags &= ~IORESOURCE_IO;
4713 /* Although we don't use this I/O region, we should
4714 request it from the kernel anyway, to avoid problems
4715 with other drivers accessing it. */
4716 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4717 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4721 #if defined(__alpha__)
4722 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4723 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4724 pdev->bus->number, pdev->devfn);
4725 printk("rev_id=%d) IRQ%d\n",
4726 cyy_rev_id, (int)cy_pci_irq);
4727 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4728 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4729 printk("Cyclom-Y/PCI not supported for low addresses in "
4730 "Alpha systems.\n");
4735 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4736 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4739 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4740 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4742 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4743 cyy_init_card(cy_pci_addr2, 1));
4744 if(cy_pci_nchan == 0) {
4745 printk("Cyclom-Y PCI host card with ");
4746 printk("no Serial-Modules at 0x%lx.\n",
4747 (ulong) cy_pci_phys2);
4751 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4752 printk("Cyclom-Y/PCI found at 0x%lx ",
4753 (ulong) cy_pci_phys2);
4754 printk("but no channels are available.\n");
4755 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4758 /* fill the next cy_card structure available */
4759 for (j = 0 ; j < NR_CARDS ; j++) {
4760 if (cy_card[j].base_addr == 0) break;
4762 if (j == NR_CARDS) { /* no more cy_cards available */
4763 printk("Cyclom-Y/PCI found at 0x%lx ",
4764 (ulong) cy_pci_phys2);
4765 printk("but no more cards can be used.\n");
4766 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4771 if(request_irq(cy_pci_irq, cyy_interrupt,
4772 IRQF_SHARED, "Cyclom-Y", &cy_card[j]))
4774 printk("Cyclom-Y/PCI found at 0x%lx ",
4775 (ulong) cy_pci_phys2);
4776 printk("but could not allocate IRQ%d.\n",
4782 cy_card[j].base_phys = (ulong)cy_pci_phys2;
4783 cy_card[j].ctl_phys = (ulong)cy_pci_phys0;
4784 cy_card[j].base_addr = cy_pci_addr2;
4785 cy_card[j].ctl_addr = cy_pci_addr0;
4786 cy_card[j].irq = (int) cy_pci_irq;
4787 cy_card[j].bus_index = 1;
4788 cy_card[j].first_line = cy_next_channel;
4789 cy_card[j].num_chips = cy_pci_nchan/4;
4790 cy_card[j].pdev = pdev;
4792 /* enable interrupts in the PCI interface */
4793 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4797 cy_writeb(cy_pci_addr0+0x4c, 0x43);
4802 default: /* Old boards, use PLX_9060 */
4804 plx_init(cy_pci_addr0, 0x6c);
4805 /* For some yet unknown reason, once the PLX9060 reloads
4806 the EEPROM, the IRQ is lost and, thus, we have to
4807 re-write it to the PCI config. registers.
4808 This will remain here until we find a permanent fix. */
4809 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4811 cy_writew(cy_pci_addr0+0x68,
4812 cy_readw(cy_pci_addr0+0x68)|0x0900);
4817 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4819 (ulong)cy_pci_phys2,
4820 (ulong)(cy_pci_phys2 + CyPCI_Ywin - 1),
4822 printk("%d channels starting from port %d.\n",
4823 cy_pci_nchan, cy_next_channel);
4825 cy_next_channel += cy_pci_nchan;
4826 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
4828 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4829 pdev->bus->number, pdev->devfn);
4830 printk("rev_id=%d) IRQ%d\n",
4831 cyy_rev_id, (int)cy_pci_irq);
4832 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4833 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4834 printk("Cyclades-Z/PCI not supported for low addresses\n");
4836 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
4838 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4839 pdev->bus->number, pdev->devfn);
4840 printk("rev_id=%d) IRQ%d\n",
4841 cyy_rev_id, (int)cy_pci_irq);
4842 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4843 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4845 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4847 /* Disable interrupts on the PLX before resetting it */
4848 cy_writew(cy_pci_addr0+0x68,
4849 cy_readw(cy_pci_addr0+0x68) & ~0x0900);
4851 plx_init(cy_pci_addr0, 0x6c);
4852 /* For some yet unknown reason, once the PLX9060 reloads
4853 the EEPROM, the IRQ is lost and, thus, we have to
4854 re-write it to the PCI config. registers.
4855 This will remain here until we find a permanent fix. */
4856 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4858 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4859 cy_pci_addr0)->mail_box_0);
4861 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4862 printk(" Warning: PCI I/O bit incorrectly set. "
4863 "Ignoring it...\n");
4864 pdev->resource[2].flags &= ~IORESOURCE_IO;
4867 /* Although we don't use this I/O region, we should
4868 request it from the kernel anyway, to avoid problems
4869 with other drivers accessing it. */
4870 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4871 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4875 if (mailbox == ZE_V1) {
4876 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ze_win);
4877 if (ZeIndex == NR_CARDS) {
4878 printk("Cyclades-Ze/PCI found at 0x%lx ",
4879 (ulong)cy_pci_phys2);
4880 printk("but no more cards can be used.\n");
4881 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4883 Ze_phys0[ZeIndex] = cy_pci_phys0;
4884 Ze_phys2[ZeIndex] = cy_pci_phys2;
4885 Ze_addr0[ZeIndex] = cy_pci_addr0;
4886 Ze_addr2[ZeIndex] = cy_pci_addr2;
4887 Ze_irq[ZeIndex] = cy_pci_irq;
4888 Ze_pdev[ZeIndex] = pdev;
4894 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Zwin);
4898 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4899 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4900 if (mailbox == ZO_V1) {
4901 cy_writel(&((struct RUNTIME_9060 *)
4902 (cy_pci_addr0))->loc_addr_base, WIN_CREG);
4904 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
4905 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4906 (cy_pci_addr2))->fpga_id)),
4907 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4908 (cy_pci_addr2))->fpga_version)));
4909 cy_writel(&((struct RUNTIME_9060 *)
4910 (cy_pci_addr0))->loc_addr_base, WIN_RAM);
4912 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
4915 /* The following clears the firmware id word. This ensures
4916 that the driver will not attempt to talk to the board
4917 until it has been properly initialized.
4920 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
4921 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
4923 /* This must be a Cyclades-8Zo/PCI. The extendable
4924 version will have a different device_id and will
4925 be allocated its maximum number of ports. */
4928 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4929 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4930 (ulong)cy_pci_phys2);
4931 printk("but no channels are available.\n");
4932 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4936 /* fill the next cy_card structure available */
4937 for (j = 0 ; j < NR_CARDS ; j++) {
4938 if (cy_card[j].base_addr == 0) break;
4940 if (j == NR_CARDS) { /* no more cy_cards available */
4941 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4942 (ulong)cy_pci_phys2);
4943 printk("but no more cards can be used.\n");
4944 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4948 #ifdef CONFIG_CYZ_INTR
4949 /* allocate IRQ only if board has an IRQ */
4950 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
4951 if(request_irq(cy_pci_irq, cyz_interrupt,
4952 IRQF_SHARED, "Cyclades-Z", &cy_card[j]))
4954 printk("Cyclom-8Zo/PCI found at 0x%lx ",
4955 (ulong) cy_pci_phys2);
4956 printk("but could not allocate IRQ%d.\n",
4961 #endif /* CONFIG_CYZ_INTR */
4965 cy_card[j].base_phys = cy_pci_phys2;
4966 cy_card[j].ctl_phys = cy_pci_phys0;
4967 cy_card[j].base_addr = cy_pci_addr2;
4968 cy_card[j].ctl_addr = cy_pci_addr0;
4969 cy_card[j].irq = (int) cy_pci_irq;
4970 cy_card[j].bus_index = 1;
4971 cy_card[j].first_line = cy_next_channel;
4972 cy_card[j].num_chips = -1;
4973 cy_card[j].pdev = pdev;
4976 #ifdef CONFIG_CYZ_INTR
4977 /* don't report IRQ if board is no IRQ */
4978 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
4979 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4980 j+1,(ulong)cy_pci_phys2,
4981 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1),
4984 #endif /* CONFIG_CYZ_INTR */
4985 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
4986 j+1,(ulong)cy_pci_phys2,
4987 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
4989 printk("%d channels starting from port %d.\n",
4990 cy_pci_nchan,cy_next_channel);
4991 cy_next_channel += cy_pci_nchan;
4995 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
4996 cy_pci_phys0 = Ze_phys0[0];
4997 cy_pci_phys2 = Ze_phys2[0];
4998 cy_pci_addr0 = Ze_addr0[0];
4999 cy_pci_addr2 = Ze_addr2[0];
5000 cy_pci_irq = Ze_irq[0];
5002 for (j = 0 ; j < ZeIndex-1 ; j++) {
5003 Ze_phys0[j] = Ze_phys0[j+1];
5004 Ze_phys2[j] = Ze_phys2[j+1];
5005 Ze_addr0[j] = Ze_addr0[j+1];
5006 Ze_addr2[j] = Ze_addr2[j+1];
5007 Ze_irq[j] = Ze_irq[j+1];
5008 Ze_pdev[j] = Ze_pdev[j+1];
5011 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5012 cy_pci_addr0)->mail_box_0);
5014 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5015 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5016 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
5019 /* This must be the new Cyclades-Ze/PCI. */
5020 cy_pci_nchan = ZE_V1_NPORTS;
5022 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
5023 printk("Cyclades-Ze/PCI found at 0x%lx ",
5024 (ulong)cy_pci_phys2);
5025 printk("but no channels are available.\n");
5026 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
5030 /* fill the next cy_card structure available */
5031 for (j = 0 ; j < NR_CARDS ; j++) {
5032 if (cy_card[j].base_addr == 0) break;
5034 if (j == NR_CARDS) { /* no more cy_cards available */
5035 printk("Cyclades-Ze/PCI found at 0x%lx ",
5036 (ulong)cy_pci_phys2);
5037 printk("but no more cards can be used.\n");
5038 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5042 #ifdef CONFIG_CYZ_INTR
5043 /* allocate IRQ only if board has an IRQ */
5044 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
5045 if(request_irq(cy_pci_irq, cyz_interrupt,
5046 IRQF_SHARED, "Cyclades-Z", &cy_card[j]))
5048 printk("Cyclom-Ze/PCI found at 0x%lx ",
5049 (ulong) cy_pci_phys2);
5050 printk("but could not allocate IRQ%d.\n",
5055 #endif /* CONFIG_CYZ_INTR */
5058 cy_card[j].base_phys = cy_pci_phys2;
5059 cy_card[j].ctl_phys = cy_pci_phys0;
5060 cy_card[j].base_addr = cy_pci_addr2;
5061 cy_card[j].ctl_addr = cy_pci_addr0;
5062 cy_card[j].irq = (int) cy_pci_irq;
5063 cy_card[j].bus_index = 1;
5064 cy_card[j].first_line = cy_next_channel;
5065 cy_card[j].num_chips = -1;
5066 cy_card[j].pdev = pdev;
5069 #ifdef CONFIG_CYZ_INTR
5070 /* don't report IRQ if board is no IRQ */
5071 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
5072 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5073 j+1,(ulong)cy_pci_phys2,
5074 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1),
5077 #endif /* CONFIG_CYZ_INTR */
5078 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5079 j+1,(ulong)cy_pci_phys2,
5080 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1));
5082 printk("%d channels starting from port %d.\n",
5083 cy_pci_nchan,cy_next_channel);
5084 cy_next_channel += cy_pci_nchan;
5087 printk("Cyclades-Ze/PCI found at 0x%x ",
5088 (unsigned int) Ze_phys2[0]);
5089 printk("but no more cards can be used.\n");
5090 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5095 #endif /* ifdef CONFIG_PCI */
5096 } /* cy_detect_pci */
5100 * This routine prints out the appropriate serial driver version number
5101 * and identifies which options were configured into this driver.
5106 char *rcsvers, *rcsdate, *tmp;
5107 rcsvers = strchr(rcsid, ' '); rcsvers++;
5108 tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
5109 rcsdate = strchr(tmp, ' '); rcsdate++;
5110 tmp = strrchr(rcsdate, ' '); *tmp = '\0';
5111 printk("Cyclades driver %s %s\n",
5113 printk(" built %s %s\n",
5114 __DATE__, __TIME__);
5115 } /* show_version */
5118 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5119 int *eof, void *data)
5121 struct cyclades_port *info;
5127 __u32 cur_jifs = jiffies;
5129 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn IdleIn Overruns Ldisc\n");
5134 /* Output one line for each known port */
5135 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5139 size = sprintf(buf+len,
5140 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5142 JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
5143 info->idle_stats.xmit_bytes,
5144 JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
5145 info->idle_stats.recv_bytes,
5146 JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
5147 info->idle_stats.overruns,
5148 (long) info->tty->ldisc.num);
5150 size = sprintf(buf+len,
5151 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5152 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5160 if (pos > offset + length)
5165 *start = buf + (offset - begin); /* Start of wanted data */
5166 len -= (offset - begin); /* Start slop */
5168 len = length; /* Ending slop */
5174 /* The serial driver boot-time initialization code!
5175 Hardware I/O ports are mapped to character special devices on a
5176 first found, first allocated manner. That is, this code searches
5177 for Cyclom cards in the system. As each is found, it is probed
5178 to discover how many chips (and thus how many ports) are present.
5179 These ports are mapped to the tty ports 32 and upward in monotonic
5180 fashion. If an 8-port card is replaced with a 16-port card, the
5181 port mapping on a following card will shift.
5183 This approach is different from what is used in the other serial
5184 device driver because the Cyclom is more properly a multiplexer,
5185 not just an aggregation of serial ports on one card.
5187 If there are more cards with more ports than have been
5188 statically allocated above, a warning is printed and the
5189 extra ports are ignored.
5192 static const struct tty_operations cy_ops = {
5196 .put_char = cy_put_char,
5197 .flush_chars = cy_flush_chars,
5198 .write_room = cy_write_room,
5199 .chars_in_buffer = cy_chars_in_buffer,
5200 .flush_buffer = cy_flush_buffer,
5202 .throttle = cy_throttle,
5203 .unthrottle = cy_unthrottle,
5204 .set_termios = cy_set_termios,
5207 .hangup = cy_hangup,
5208 .break_ctl = cy_break,
5209 .wait_until_sent = cy_wait_until_sent,
5210 .read_proc = cyclades_get_proc_info,
5211 .tiocmget = cy_tiocmget,
5212 .tiocmset = cy_tiocmset,
5218 struct cyclades_port *info;
5219 struct cyclades_card *cinfo;
5220 int number_z_boards = 0;
5221 int board,port,i,index;
5222 unsigned long mailbox;
5223 unsigned short chip_number;
5226 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5227 if (!cy_serial_driver)
5231 /* Initialize the tty_driver structure */
5233 cy_serial_driver->owner = THIS_MODULE;
5234 cy_serial_driver->driver_name = "cyclades";
5235 cy_serial_driver->name = "ttyC";
5236 cy_serial_driver->major = CYCLADES_MAJOR;
5237 cy_serial_driver->minor_start = 0;
5238 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5239 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5240 cy_serial_driver->init_termios = tty_std_termios;
5241 cy_serial_driver->init_termios.c_cflag =
5242 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5243 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5244 tty_set_operations(cy_serial_driver, &cy_ops);
5246 if (tty_register_driver(cy_serial_driver))
5247 panic("Couldn't register Cyclades serial driver\n");
5249 for (i = 0; i < NR_CARDS; i++) {
5250 /* base_addr=0 indicates board not found */
5251 cy_card[i].base_addr = NULL;
5254 /* the code below is responsible to find the boards. Each different
5255 type of board has its own detection routine. If a board is found,
5256 the next cy_card structure available is set by the detection
5257 routine. These functions are responsible for checking the
5258 availability of cy_card and cy_port data structures and updating
5259 the cy_next_channel. */
5261 /* look for isa boards */
5262 cy_isa_nboard = cy_detect_isa();
5264 /* look for pci boards */
5265 cy_pci_nboard = cy_detect_pci();
5267 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5269 /* invalidate remaining cy_card structures */
5270 for (i = 0 ; i < NR_CARDS ; i++) {
5271 if (cy_card[i].base_addr == 0) {
5272 cy_card[i].first_line = -1;
5273 cy_card[i].ctl_addr = NULL;
5275 cy_card[i].bus_index = 0;
5276 cy_card[i].first_line = 0;
5277 cy_card[i].num_chips = 0;
5280 /* invalidate remaining cy_port structures */
5281 for (i = cy_next_channel ; i < NR_PORTS ; i++) {
5282 cy_port[i].line = -1;
5283 cy_port[i].magic = -1;
5286 /* initialize per-port data structures for each valid board found */
5287 for (board = 0 ; board < cy_nboard ; board++) {
5288 cinfo = &cy_card[board];
5289 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5291 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5292 cy_card[board].ctl_addr)->mail_box_0);
5293 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5294 cinfo->intr_enabled = 0;
5295 cinfo->nports = 0; /* Will be correctly set later, after
5297 spin_lock_init(&cinfo->card_lock);
5298 for (port = cinfo->first_line ;
5299 port < cinfo->first_line + nports;
5302 info = &cy_port[port];
5303 info->magic = CYCLADES_MAGIC;
5304 info->type = PORT_STARTECH;
5308 info->flags = STD_COM_FLAGS;
5310 if (mailbox == ZO_V1)
5311 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5313 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
5323 info->custom_divisor = 0;
5324 info->close_delay = 5*HZ/10;
5325 info->closing_wait = CLOSING_WAIT_DELAY;
5326 info->icount.cts = info->icount.dsr =
5327 info->icount.rng = info->icount.dcd = 0;
5328 info->icount.rx = info->icount.tx = 0;
5329 info->icount.frame = info->icount.parity = 0;
5330 info->icount.overrun = info->icount.brk = 0;
5334 info->blocked_open = 0;
5335 info->default_threshold = 0;
5336 info->default_timeout = 0;
5337 INIT_WORK(&info->tqueue, do_softint);
5338 init_waitqueue_head(&info->open_wait);
5339 init_waitqueue_head(&info->close_wait);
5340 init_waitqueue_head(&info->shutdown_wait);
5341 init_waitqueue_head(&info->delta_msr_wait);
5344 info->read_status_mask = 0;
5346 /* Bentson's vars */
5347 info->jiffies[0] = 0;
5348 info->jiffies[1] = 0;
5349 info->jiffies[2] = 0;
5350 info->rflush_count = 0;
5351 #ifdef CONFIG_CYZ_INTR
5352 init_timer(&cyz_rx_full_timer[port]);
5353 cyz_rx_full_timer[port].function = NULL;
5357 }else{ /* Cyclom-Y of some kind*/
5358 index = cinfo->bus_index;
5359 spin_lock_init(&cinfo->card_lock);
5360 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5361 for (port = cinfo->first_line ;
5362 port < cinfo->first_line + cinfo->nports ;
5365 info = &cy_port[port];
5366 info->magic = CYCLADES_MAGIC;
5367 info->type = PORT_CIRRUS;
5370 info->flags = STD_COM_FLAGS;
5372 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5373 info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS;
5375 info->cor3 = 0x08; /* _very_ small rcv threshold */
5378 info->custom_divisor = 0;
5379 info->close_delay = 5*HZ/10;
5380 info->closing_wait = CLOSING_WAIT_DELAY;
5381 info->icount.cts = info->icount.dsr =
5382 info->icount.rng = info->icount.dcd = 0;
5383 info->icount.rx = info->icount.tx = 0;
5384 info->icount.frame = info->icount.parity = 0;
5385 info->icount.overrun = info->icount.brk = 0;
5386 chip_number = (port - cinfo->first_line) / 4;
5387 if ((info->chip_rev =
5388 cy_readb(cinfo->base_addr +
5389 (cy_chip_offset[chip_number]<<index) +
5390 (CyGFRCR<<index))) >= CD1400_REV_J) {
5391 /* It is a CD1400 rev. J or later */
5392 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5393 info->tco = baud_co_60[13]; /* Tx CO */
5394 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5395 info->rco = baud_co_60[13]; /* Rx CO */
5397 info->rtsdtr_inv = 1;
5399 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5400 info->tco = baud_co_25[13]; /* Tx CO */
5401 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5402 info->rco = baud_co_25[13]; /* Rx CO */
5404 info->rtsdtr_inv = 0;
5409 info->blocked_open = 0;
5410 info->default_threshold = 0;
5411 info->default_timeout = 0;
5412 INIT_WORK(&info->tqueue, do_softint);
5413 init_waitqueue_head(&info->open_wait);
5414 init_waitqueue_head(&info->close_wait);
5415 init_waitqueue_head(&info->shutdown_wait);
5416 init_waitqueue_head(&info->delta_msr_wait);
5419 info->read_status_mask =
5420 CyTIMEOUT| CySPECHAR| CyBREAK
5421 | CyPARITY| CyFRAME| CyOVERRUN;
5427 #ifndef CONFIG_CYZ_INTR
5428 if (number_z_boards && !cyz_timeron){
5430 cyz_timerlist.expires = jiffies + 1;
5431 add_timer(&cyz_timerlist);
5433 printk("Cyclades-Z polling initialized\n");
5436 #endif /* CONFIG_CYZ_INTR */
5443 cy_cleanup_module(void)
5447 #ifndef CONFIG_CYZ_INTR
5450 del_timer(&cyz_timerlist);
5452 #endif /* CONFIG_CYZ_INTR */
5454 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5455 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5458 put_tty_driver(cy_serial_driver);
5460 for (i = 0; i < NR_CARDS; i++) {
5461 if (cy_card[i].base_addr) {
5462 iounmap(cy_card[i].base_addr);
5463 if (cy_card[i].ctl_addr)
5464 iounmap(cy_card[i].ctl_addr);
5466 #ifndef CONFIG_CYZ_INTR
5467 && cy_card[i].num_chips != -1 /* not a Z card */
5468 #endif /* CONFIG_CYZ_INTR */
5470 free_irq(cy_card[i].irq, &cy_card[i]);
5472 if (cy_card[i].pdev)
5473 pci_release_regions(cy_card[i].pdev);
5477 } /* cy_cleanup_module */
5479 module_init(cy_init);
5480 module_exit(cy_cleanup_module);
5482 MODULE_LICENSE("GPL");