drivers/serial/68360serial.c

   1 /*
   2  *  UART driver for 68360 CPM SCC or SMC
   3  *  Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>,
   4  *  Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca>
   5  *  Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
   6  *
   7  * I used the serial.c driver as the framework for this driver.
   8  * Give credit to those guys.
   9  * The original code was written for the MBX860 board.  I tried to make
  10  * it generic, but there may be some assumptions in the structures that
  11  * have to be fixed later.
  12  * To save porting time, I did not bother to change any object names
  13  * that are not accessed outside of this file.
  14  * It still needs lots of work........When it was easy, I included code
  15  * to support the SCCs, but this has never been tested, nor is it complete.
  16  * Only the SCCs support modem control, so that is not complete either.
  17  *
  18  * This module exports the following rs232 io functions:
  19  *
  20  *      int rs_360_init(void);
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/signal.h>
  26 #include <linux/sched.h>
  27 #include <linux/timer.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/serial.h>
  32 #include <linux/serialP.h>
  33 #include <linux/major.h>
  34 #include <linux/string.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/mm.h>
  38 #include <linux/init.h>
  39 #include <linux/delay.h>
  40 #include <asm/irq.h>
  41 #include <asm/m68360.h>
  42 #include <asm/commproc.h>
  43
  44
  45 #ifdef CONFIG_KGDB
  46 extern void breakpoint(void);
  47 extern void set_debug_traps(void);
  48 extern int  kgdb_output_string (const char* s, unsigned int count);
  49 #endif
  50
  51
  52 /* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */
  53 #include <linux/console.h>
  54 #include <linux/jiffies.h>
  55
  56 /* this defines the index into rs_table for the port to use
  57  */
  58 #ifndef CONFIG_SERIAL_CONSOLE_PORT
  59 #define CONFIG_SERIAL_CONSOLE_PORT      1 /* ie SMC2 - note USE_SMC2 must be defined */
  60 #endif
  61 /* #endif */
  62
  63 #if 0
  64 /* SCC2 for console
  65  */
  66 #undef CONFIG_SERIAL_CONSOLE_PORT
  67 #define CONFIG_SERIAL_CONSOLE_PORT      2
  68 #endif
  69
  70
  71 #define TX_WAKEUP       ASYNC_SHARE_IRQ
  72
  73 static char *serial_name = "CPM UART driver";
  74 static char *serial_version = "0.03";
  75
  76 static struct tty_driver *serial_driver;
  77 int serial_console_setup(struct console *co, char *options);
  78
  79 /*
  80  * Serial driver configuration section.  Here are the various options:
  81  */
  82 #define SERIAL_PARANOIA_CHECK
  83 #define CONFIG_SERIAL_NOPAUSE_IO
  84 #define SERIAL_DO_RESTART
  85
  86 /* Set of debugging defines */
  87
  88 #undef SERIAL_DEBUG_INTR
  89 #undef SERIAL_DEBUG_OPEN
  90 #undef SERIAL_DEBUG_FLOW
  91 #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
  92
  93 #define _INLINE_ inline
  94
  95 #define DBG_CNT(s)
  96
  97 /* We overload some of the items in the data structure to meet our
  98  * needs.  For example, the port address is the CPM parameter ram
  99  * offset for the SCC or SMC.  The maximum number of ports is 4 SCCs and
 100  * 2 SMCs.  The "hub6" field is used to indicate the channel number, with
 101  * a flag indicating SCC or SMC, and the number is used as an index into
 102  * the CPM parameter area for this device.
 103  * The "type" field is currently set to 0, for PORT_UNKNOWN.  It is
 104  * not currently used.  I should probably use it to indicate the port
 105  * type of SMC or SCC.
 106  * The SMCs do not support any modem control signals.
 107  */
 108 #define smc_scc_num     hub6
 109 #define NUM_IS_SCC      ((int)0x00010000)
 110 #define PORT_NUM(P)     ((P) & 0x0000ffff)
 111
 112
 113 #if defined (CONFIG_UCQUICC)
 114
 115 volatile extern void *_periph_base;
 116 /* sipex transceiver
 117  *   mode bits for       are on pins
 118  *
 119  *    SCC2                d16..19
 120  *    SCC3                d20..23
 121  *    SCC4                d24..27
 122  */
 123 #define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1)))
 124
 125 static uint sipex_mode_bits = 0x00000000;
 126
 127 #endif
 128
 129 /* There is no `serial_state' defined back here in 2.0.
 130  * Try to get by with serial_struct
 131  */
 132 /* #define serial_state serial_struct */
 133
 134 /* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few
 135  * extras: */
 136
 137 #if 0
 138 struct async_icount_24 {
 139         __u32   cts, dsr, rng, dcd, tx, rx;
 140         __u32   frame, parity, overrun, brk;
 141         __u32   buf_overrun;
 142 } icount;
 143 #endif
 144
 145 #if 0
 146
 147 struct serial_state {
 148         int     magic;
 149         int     baud_base;
 150         unsigned long   port;
 151         int     irq;
 152         int     flags;
 153         int     hub6;
 154         int     type;
 155         int     line;
 156         int     revision;       /* Chip revision (950) */
 157         int     xmit_fifo_size;
 158         int     custom_divisor;
 159         int     count;
 160         u8      *iomem_base;
 161         u16     iomem_reg_shift;
 162         unsigned short  close_delay;
 163         unsigned short  closing_wait; /* time to wait before closing */
 164         struct async_icount_24     icount;
 165         int     io_type;
 166         struct async_struct *info;
 167 };
 168 #endif
 169
 170 #define SSTATE_MAGIC 0x5302
 171
 172
 173
 174 /* SMC2 is sometimes used for low performance TDM interfaces.  Define
 175  * this as 1 if you want SMC2 as a serial port UART managed by this driver.
 176  * Define this as 0 if you wish to use SMC2 for something else.
 177  */
 178 #define USE_SMC2 1
 179
 180 #if 0
 181 /* Define SCC to ttySx mapping. */
 182 #define SCC_NUM_BASE    (USE_SMC2 + 1)  /* SCC base tty "number" */
 183
 184 /* Define which SCC is the first one to use for a serial port.  These
 185  * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
 186  * for Ethernet, and the first available SCC for serial UART is SCC2.
 187  * NOTE:  IF YOU CHANGE THIS, you have to change the PROFF_xxx and
 188  * interrupt vectors in the table below to match.
 189  */
 190 #define SCC_IDX_BASE    1       /* table index */
 191 #endif
 192
 193
 194 /* Processors other than the 860 only get SMCs configured by default.
 195  * Either they don't have SCCs or they are allocated somewhere else.
 196  * Of course, there are now 860s without some SCCs, so we will need to
 197  * address that someday.
 198  * The Embedded Planet Multimedia I/O cards use TDM interfaces to the
 199  * stereo codec parts, and we use SMC2 to help support that.
 200  */
 201 static struct serial_state rs_table[] = {
 202 /*  type   line   PORT           IRQ       FLAGS  smc_scc_num (F.K.A. hub6) */
 203         {  0,     0, PRSLOT_SMC1, CPMVEC_SMC1,   0,    0 }    /* SMC1 ttyS0 */
 204 #if USE_SMC2
 205         ,{ 0,     0, PRSLOT_SMC2, CPMVEC_SMC2,   0,    1 }     /* SMC2 ttyS1 */
 206 #endif
 207
 208 #if defined(CONFIG_SERIAL_68360_SCC)
 209         ,{ 0,     0, PRSLOT_SCC2, CPMVEC_SCC2,   0, (NUM_IS_SCC | 1) }    /* SCC2 ttyS2 */
 210         ,{ 0,     0, PRSLOT_SCC3, CPMVEC_SCC3,   0, (NUM_IS_SCC | 2) }    /* SCC3 ttyS3 */
 211         ,{ 0,     0, PRSLOT_SCC4, CPMVEC_SCC4,   0, (NUM_IS_SCC | 3) }    /* SCC4 ttyS4 */
 212 #endif
 213 };
 214
 215 #define NR_PORTS        (sizeof(rs_table)/sizeof(struct serial_state))
 216
 217 /* The number of buffer descriptors and their sizes.
 218  */
 219 #define RX_NUM_FIFO     4
 220 #define RX_BUF_SIZE     32
 221 #define TX_NUM_FIFO     4
 222 #define TX_BUF_SIZE     32
 223
 224 #define CONSOLE_NUM_FIFO 2
 225 #define CONSOLE_BUF_SIZE 4
 226
 227 char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE];
 228
 229 /* The async_struct in serial.h does not really give us what we
 230  * need, so define our own here.
 231  */
 232 typedef struct serial_info {
 233         int                     magic;
 234         int                     flags;
 235
 236         struct serial_state     *state;
 237         /* struct serial_struct *state; */
 238         /* struct async_struct  *state; */
 239
 240         struct tty_struct       *tty;
 241         int                     read_status_mask;
 242         int                     ignore_status_mask;
 243         int                     timeout;
 244         int                     line;
 245         int                     x_char; /* xon/xoff character */
 246         int                     close_delay;
 247         unsigned short          closing_wait;
 248         unsigned short          closing_wait2;
 249         unsigned long           event;
 250         unsigned long           last_active;
 251         int                     blocked_open; /* # of blocked opens */
 252         struct work_struct      tqueue;
 253         struct work_struct      tqueue_hangup;
 254         wait_queue_head_t       open_wait;
 255         wait_queue_head_t       close_wait;
 256
 257
 258 /* CPM Buffer Descriptor pointers.
 259         */
 260         QUICC_BD                        *rx_bd_base;
 261         QUICC_BD                        *rx_cur;
 262         QUICC_BD                        *tx_bd_base;
 263         QUICC_BD                        *tx_cur;
 264 } ser_info_t;
 265
 266
 267 /* since kmalloc_init() does not get called until much after this initialization: */
 268 static ser_info_t  quicc_ser_info[NR_PORTS];
 269 static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE];
 270 static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE];
 271
 272 static void change_speed(ser_info_t *info);
 273 static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout);
 274
 275 static inline int serial_paranoia_check(ser_info_t *info,
 276                                         char *name, const char *routine)
 277 {
 278 #ifdef SERIAL_PARANOIA_CHECK
 279         static const char *badmagic =
 280                 "Warning: bad magic number for serial struct (%s) in %s\n";
 281         static const char *badinfo =
 282                 "Warning: null async_struct for (%s) in %s\n";
 283
 284         if (!info) {
 285                 printk(badinfo, name, routine);
 286                 return 1;
 287         }
 288         if (info->magic != SERIAL_MAGIC) {
 289                 printk(badmagic, name, routine);
 290                 return 1;
 291         }
 292 #endif
 293         return 0;
 294 }
 295
 296 /*
 297  * This is used to figure out the divisor speeds and the timeouts,
 298  * indexed by the termio value.  The generic CPM functions are responsible
 299  * for setting and assigning baud rate generators for us.
 300  */
 301 static int baud_table[] = {
 302         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
 303         9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
 304
 305 /* This sucks. There is a better way: */
 306 #if defined(CONFIG_CONSOLE_9600)
 307   #define CONSOLE_BAUDRATE 9600
 308 #elif defined(CONFIG_CONSOLE_19200)
 309   #define CONSOLE_BAUDRATE 19200
 310 #elif defined(CONFIG_CONSOLE_115200)
 311   #define CONSOLE_BAUDRATE 115200
 312 #else
 313   #warning "console baud rate undefined"
 314   #define CONSOLE_BAUDRATE 9600
 315 #endif
 316
 317 /*
 318  * ------------------------------------------------------------
 319  * rs_stop() and rs_start()
 320  *
 321  * This routines are called before setting or resetting tty->stopped.
 322  * They enable or disable transmitter interrupts, as necessary.
 323  * ------------------------------------------------------------
 324  */
 325 static void rs_360_stop(struct tty_struct *tty)
 326 {
 327         ser_info_t *info = (ser_info_t *)tty->driver_data;
 328         int     idx;
 329         unsigned long flags;
 330         volatile struct scc_regs *sccp;
 331         volatile struct smc_regs *smcp;
 332
 333         if (serial_paranoia_check(info, tty->name, "rs_stop"))
 334                 return;
 335
 336         local_irq_save(flags);
 337         idx = PORT_NUM(info->state->smc_scc_num);
 338         if (info->state->smc_scc_num & NUM_IS_SCC) {
 339                 sccp = &pquicc->scc_regs[idx];
 340                 sccp->scc_sccm &= ~UART_SCCM_TX;
 341         } else {
 342                 /* smcp = &cpmp->cp_smc[idx]; */
 343                 smcp = &pquicc->smc_regs[idx];
 344                 smcp->smc_smcm &= ~SMCM_TX;
 345         }
 346         local_irq_restore(flags);
 347 }
 348
 349
 350 static void rs_360_start(struct tty_struct *tty)
 351 {
 352         ser_info_t *info = (ser_info_t *)tty->driver_data;
 353         int     idx;
 354         unsigned long flags;
 355         volatile struct scc_regs *sccp;
 356         volatile struct smc_regs *smcp;
 357
 358         if (serial_paranoia_check(info, tty->name, "rs_stop"))
 359                 return;
 360
 361         local_irq_save(flags);
 362         idx = PORT_NUM(info->state->smc_scc_num);
 363         if (info->state->smc_scc_num & NUM_IS_SCC) {
 364                 sccp = &pquicc->scc_regs[idx];
 365                 sccp->scc_sccm |= UART_SCCM_TX;
 366         } else {
 367                 smcp = &pquicc->smc_regs[idx];
 368                 smcp->smc_smcm |= SMCM_TX;
 369         }
 370         local_irq_restore(flags);
 371 }
 372
 373 /*
 374  * ----------------------------------------------------------------------
 375  *
 376  * Here starts the interrupt handling routines.  All of the following
 377  * subroutines are declared as inline and are folded into
 378  * rs_interrupt().  They were separated out for readability's sake.
 379  *
 380  * Note: rs_interrupt() is a "fast" interrupt, which means that it
 381  * runs with interrupts turned off.  People who may want to modify
 382  * rs_interrupt() should try to keep the interrupt handler as fast as
 383  * possible.  After you are done making modifications, it is not a bad
 384  * idea to do:
 385  *
 386  * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
 387  *
 388  * and look at the resulting assemble code in serial.s.
 389  *
 390  *                              - Ted Ts'o (tytso@mit.edu), 7-Mar-93
 391  * -----------------------------------------------------------------------
 392  */
 393
 394 static _INLINE_ void receive_chars(ser_info_t *info)
 395 {
 396         struct tty_struct *tty = info->tty;
 397         unsigned char ch, flag, *cp;
 398         /*int   ignored = 0;*/
 399         int     i;
 400         ushort  status;
 401          struct async_icount *icount;
 402         /* struct       async_icount_24 *icount; */
 403         volatile QUICC_BD       *bdp;
 404
 405         icount = &info->state->icount;
 406
 407         /* Just loop through the closed BDs and copy the characters into
 408          * the buffer.
 409          */
 410         bdp = info->rx_cur;
 411         for (;;) {
 412                 if (bdp->status & BD_SC_EMPTY)  /* If this one is empty */
 413                         break;                  /*   we are all done */
 414
 415                 /* The read status mask tell us what we should do with
 416                  * incoming characters, especially if errors occur.
 417                  * One special case is the use of BD_SC_EMPTY.  If
 418                  * this is not set, we are supposed to be ignoring
 419                  * inputs.  In this case, just mark the buffer empty and
 420                  * continue.
 421                  */
 422                 if (!(info->read_status_mask & BD_SC_EMPTY)) {
 423                         bdp->status |= BD_SC_EMPTY;
 424                         bdp->status &=
 425                                 ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
 426
 427                         if (bdp->status & BD_SC_WRAP)
 428                                 bdp = info->rx_bd_base;
 429                         else
 430                                 bdp++;
 431                         continue;
 432                 }
 433
 434                 /* Get the number of characters and the buffer pointer.
 435                 */
 436                 i = bdp->length;
 437                 /* cp = (unsigned char *)__va(bdp->buf); */
 438                 cp = (char *)bdp->buf;
 439                 status = bdp->status;
 440
 441                 while (i-- > 0) {
 442                         ch = *cp++;
 443                         icount->rx++;
 444
 445 #ifdef SERIAL_DEBUG_INTR
 446                         printk("DR%02x:%02x...", ch, status);
 447 #endif
 448                         flag = TTY_NORMAL;
 449
 450                         if (status & (BD_SC_BR | BD_SC_FR |
 451                                        BD_SC_PR | BD_SC_OV)) {
 452                                 /*
 453                                  * For statistics only
 454                                  */
 455                                 if (status & BD_SC_BR)
 456                                         icount->brk++;
 457                                 else if (status & BD_SC_PR)
 458                                         icount->parity++;
 459                                 else if (status & BD_SC_FR)
 460                                         icount->frame++;
 461                                 if (status & BD_SC_OV)
 462                                         icount->overrun++;
 463
 464                                 /*
 465                                  * Now check to see if character should be
 466                                  * ignored, and mask off conditions which
 467                                  * should be ignored.
 468                                 if (status & info->ignore_status_mask) {
 469                                         if (++ignored > 100)
 470                                                 break;
 471                                         continue;
 472                                 }
 473                                  */
 474                                 status &= info->read_status_mask;
 475
 476                                 if (status & (BD_SC_BR)) {
 477 #ifdef SERIAL_DEBUG_INTR
 478                                         printk("handling break....");
 479 #endif
 480                                         *tty->flip.flag_buf_ptr = TTY_BREAK;
 481                                         if (info->flags & ASYNC_SAK)
 482                                                 do_SAK(tty);
 483                                 } else if (status & BD_SC_PR)
 484                                         flag = TTY_PARITY;
 485                                 else if (status & BD_SC_FR)
 486                                         flag = TTY_FRAME;
 487                         }
 488                         tty_insert_flip_char(tty, ch, flag);
 489                         if (status & BD_SC_OV)
 490                                 /*
 491                                  * Overrun is special, since it's
 492                                  * reported immediately, and doesn't
 493                                  * affect the current character
 494                                  */
 495                                 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
 496                 }
 497
 498                 /* This BD is ready to be used again.  Clear status.
 499                  * Get next BD.
 500                  */
 501                 bdp->status |= BD_SC_EMPTY;
 502                 bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
 503
 504                 if (bdp->status & BD_SC_WRAP)
 505                         bdp = info->rx_bd_base;
 506                 else
 507                         bdp++;
 508         }
 509
 510         info->rx_cur = (QUICC_BD *)bdp;
 511
 512         tty_schedule_flip(tty);
 513 }
 514
 515 static _INLINE_ void receive_break(ser_info_t *info)
 516 {
 517         struct tty_struct *tty = info->tty;
 518
 519         info->state->icount.brk++;
 520         /* Check to see if there is room in the tty buffer for
 521          * the break.  If not, we exit now, losing the break.  FIXME
 522          */
 523         tty_insert_flip_char(tty, 0, TTY_BREAK);
 524         tty_schedule_flip(tty);
 525 }
 526
 527 static _INLINE_ void transmit_chars(ser_info_t *info)
 528 {
 529
 530         if ((info->flags & TX_WAKEUP) ||
 531             (info->tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) {
 532                 schedule_work(&info->tqueue);
 533         }
 534
 535 #ifdef SERIAL_DEBUG_INTR
 536         printk("THRE...");
 537 #endif
 538 }
 539
 540 #ifdef notdef
 541         /* I need to do this for the SCCs, so it is left as a reminder.
 542         */
 543 static _INLINE_ void check_modem_status(struct async_struct *info)
 544 {
 545         int     status;
 546         /* struct       async_icount *icount; */
 547         struct  async_icount_24 *icount;
 548
 549         status = serial_in(info, UART_MSR);
 550
 551         if (status & UART_MSR_ANY_DELTA) {
 552                 icount = &info->state->icount;
 553                 /* update input line counters */
 554                 if (status & UART_MSR_TERI)
 555                         icount->rng++;
 556                 if (status & UART_MSR_DDSR)
 557                         icount->dsr++;
 558                 if (status & UART_MSR_DDCD) {
 559                         icount->dcd++;
 560 #ifdef CONFIG_HARD_PPS
 561                         if ((info->flags & ASYNC_HARDPPS_CD) &&
 562                             (status & UART_MSR_DCD))
 563                                 hardpps();
 564 #endif
 565                 }
 566                 if (status & UART_MSR_DCTS)
 567                         icount->cts++;
 568                 wake_up_interruptible(&info->delta_msr_wait);
 569         }
 570
 571         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 572 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
 573                 printk("ttys%d CD now %s...", info->line,
 574                        (status & UART_MSR_DCD) ? "on" : "off");
 575 #endif
 576                 if (status & UART_MSR_DCD)
 577                         wake_up_interruptible(&info->open_wait);
 578                 else {
 579 #ifdef SERIAL_DEBUG_OPEN
 580                         printk("scheduling hangup...");
 581 #endif
 582                         queue_task(&info->tqueue_hangup,
 583                                            &tq_scheduler);
 584                 }
 585         }
 586         if (info->flags & ASYNC_CTS_FLOW) {
 587                 if (info->tty->hw_stopped) {
 588                         if (status & UART_MSR_CTS) {
 589 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
 590                                 printk("CTS tx start...");
 591 #endif
 592                                 info->tty->hw_stopped = 0;
 593                                 info->IER |= UART_IER_THRI;
 594                                 serial_out(info, UART_IER, info->IER);
 595                                 rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
 596                                 return;
 597                         }
 598                 } else {
 599                         if (!(status & UART_MSR_CTS)) {
 600 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
 601                                 printk("CTS tx stop...");
 602 #endif
 603                                 info->tty->hw_stopped = 1;
 604                                 info->IER &= ~UART_IER_THRI;
 605                                 serial_out(info, UART_IER, info->IER);
 606                         }
 607                 }
 608         }
 609 }
 610 #endif
 611
 612 /*
 613  * This is the serial driver's interrupt routine for a single port
 614  */
 615 /* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */
 616 static void rs_360_interrupt(int vec, void *dev_id)
 617 {
 618         u_char  events;
 619         int     idx;
 620         ser_info_t *info;
 621         volatile struct smc_regs *smcp;
 622         volatile struct scc_regs *sccp;
 623
 624         info = dev_id;
 625
 626         idx = PORT_NUM(info->state->smc_scc_num);
 627         if (info->state->smc_scc_num & NUM_IS_SCC) {
 628                 sccp = &pquicc->scc_regs[idx];
 629                 events = sccp->scc_scce;
 630                 if (events & SCCM_RX)
 631                         receive_chars(info);
 632                 if (events & SCCM_TX)
 633                         transmit_chars(info);
 634                 sccp->scc_scce = events;
 635         } else {
 636                 smcp = &pquicc->smc_regs[idx];
 637                 events = smcp->smc_smce;
 638                 if (events & SMCM_BRKE)
 639                         receive_break(info);
 640                 if (events & SMCM_RX)
 641                         receive_chars(info);
 642                 if (events & SMCM_TX)
 643                         transmit_chars(info);
 644                 smcp->smc_smce = events;
 645         }
 646
 647 #ifdef SERIAL_DEBUG_INTR
 648         printk("rs_interrupt_single(%d, %x)...",
 649                                         info->state->smc_scc_num, events);
 650 #endif
 651 #ifdef modem_control
 652         check_modem_status(info);
 653 #endif
 654         info->last_active = jiffies;
 655 #ifdef SERIAL_DEBUG_INTR
 656         printk("end.\n");
 657 #endif
 658 }
 659
 660
 661 /*
 662  * -------------------------------------------------------------------
 663  * Here ends the serial interrupt routines.
 664  * -------------------------------------------------------------------
 665  */
 666
 667
 668 static void do_softint(void *private_)
 669 {
 670         ser_info_t      *info = (ser_info_t *) private_;
 671         struct tty_struct       *tty;
 672
 673         tty = info->tty;
 674         if (!tty)
 675                 return;
 676
 677         if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
 678                 tty_wakeup(tty);
 679 }
 680
 681
 682 /*
 683  * This routine is called from the scheduler tqueue when the interrupt
 684  * routine has signalled that a hangup has occurred.  The path of
 685  * hangup processing is:
 686  *
 687  *      serial interrupt routine -> (scheduler tqueue) ->
 688  *      do_serial_hangup() -> tty->hangup() -> rs_hangup()
 689  *
 690  */
 691 static void do_serial_hangup(void *private_)
 692 {
 693         struct async_struct     *info = (struct async_struct *) private_;
 694         struct tty_struct       *tty;
 695
 696         tty = info->tty;
 697         if (!tty)
 698                 return;
 699
 700         tty_hangup(tty);
 701 }
 702
 703
 704 static int startup(ser_info_t *info)
 705 {
 706         unsigned long flags;
 707         int     retval=0;
 708         int     idx;
 709         /*struct serial_state *state = info->state;*/
 710         volatile struct smc_regs *smcp;
 711         volatile struct scc_regs *sccp;
 712         volatile struct smc_uart_pram   *up;
 713         volatile struct uart_pram           *scup;
 714
 715
 716         local_irq_save(flags);
 717
 718         if (info->flags & ASYNC_INITIALIZED) {
 719                 goto errout;
 720         }
 721
 722 #ifdef maybe
 723         if (!state->port || !state->type) {
 724                 if (info->tty)
 725                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 726                 goto errout;
 727         }
 728 #endif
 729
 730 #ifdef SERIAL_DEBUG_OPEN
 731         printk("starting up ttys%d (irq %d)...", info->line, state->irq);
 732 #endif
 733
 734
 735 #ifdef modem_control
 736         info->MCR = 0;
 737         if (info->tty->termios->c_cflag & CBAUD)
 738                 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 739 #endif
 740
 741         if (info->tty)
 742                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 743
 744         /*
 745          * and set the speed of the serial port
 746          */
 747         change_speed(info);
 748
 749         idx = PORT_NUM(info->state->smc_scc_num);
 750         if (info->state->smc_scc_num & NUM_IS_SCC) {
 751                 sccp = &pquicc->scc_regs[idx];
 752                 scup = &pquicc->pram[info->state->port].scc.pscc.u;
 753
 754                 scup->mrblr = RX_BUF_SIZE;
 755                 scup->max_idl = RX_BUF_SIZE;
 756
 757                 sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX);
 758                 sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 759
 760         } else {
 761                 smcp = &pquicc->smc_regs[idx];
 762
 763                 /* Enable interrupts and I/O.
 764                 */
 765                 smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
 766                 smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN);
 767
 768                 /* We can tune the buffer length and idle characters
 769                  * to take advantage of the entire incoming buffer size.
 770                  * If mrblr is something other than 1, maxidl has to be
 771                  * non-zero or we never get an interrupt.  The maxidl
 772                  * is the number of character times we wait after reception
 773                  * of the last character before we decide no more characters
 774                  * are coming.
 775                  */
 776                 /* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */
 777                 /* holy unionized structures, Batman: */
 778                 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
 779
 780                 up->mrblr = RX_BUF_SIZE;
 781                 up->max_idl = RX_BUF_SIZE;
 782
 783                 up->brkcr = 1;  /* number of break chars */
 784         }
 785
 786         info->flags |= ASYNC_INITIALIZED;
 787         local_irq_restore(flags);
 788         return 0;
 789
 790 errout:
 791         local_irq_restore(flags);
 792         return retval;
 793 }
 794
 795 /*
 796  * This routine will shutdown a serial port; interrupts are disabled, and
 797  * DTR is dropped if the hangup on close termio flag is on.
 798  */
 799 static void shutdown(ser_info_t *info)
 800 {
 801         unsigned long   flags;
 802         struct serial_state *state;
 803         int             idx;
 804         volatile struct smc_regs        *smcp;
 805         volatile struct scc_regs        *sccp;
 806
 807         if (!(info->flags & ASYNC_INITIALIZED))
 808                 return;
 809
 810         state = info->state;
 811
 812 #ifdef SERIAL_DEBUG_OPEN
 813         printk("Shutting down serial port %d (irq %d)....", info->line,
 814                state->irq);
 815 #endif
 816
 817         local_irq_save(flags);
 818
 819         idx = PORT_NUM(state->smc_scc_num);
 820         if (state->smc_scc_num & NUM_IS_SCC) {
 821                 sccp = &pquicc->scc_regs[idx];
 822                 sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 823 #ifdef CONFIG_SERIAL_CONSOLE
 824                 /* We can't disable the transmitter if this is the
 825                  * system console.
 826                  */
 827                 if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
 828 #endif
 829                 sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
 830         } else {
 831                 smcp = &pquicc->smc_regs[idx];
 832
 833                 /* Disable interrupts and I/O.
 834                  */
 835                 smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
 836 #ifdef CONFIG_SERIAL_CONSOLE
 837                 /* We can't disable the transmitter if this is the
 838                  * system console.
 839                  */
 840                 if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
 841 #endif
 842                         smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
 843         }
 844
 845         if (info->tty)
 846                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 847
 848         info->flags &= ~ASYNC_INITIALIZED;
 849         local_irq_restore(flags);
 850 }
 851
 852 /*
 853  * This routine is called to set the UART divisor registers to match
 854  * the specified baud rate for a serial port.
 855  */
 856 static void change_speed(ser_info_t *info)
 857 {
 858         int     baud_rate;
 859         unsigned cflag, cval, scval, prev_mode;
 860         int     i, bits, sbits, idx;
 861         unsigned long   flags;
 862         struct serial_state *state;
 863         volatile struct smc_regs        *smcp;
 864         volatile struct scc_regs        *sccp;
 865
 866         if (!info->tty || !info->tty->termios)
 867                 return;
 868         cflag = info->tty->termios->c_cflag;
 869
 870         state = info->state;
 871
 872         /* Character length programmed into the mode register is the
 873          * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
 874          * 1 or 2 stop bits, minus 1.
 875          * The value 'bits' counts this for us.
 876          */
 877         cval = 0;
 878         scval = 0;
 879
 880         /* byte size and parity */
 881         switch (cflag & CSIZE) {
 882               case CS5: bits = 5; break;
 883               case CS6: bits = 6; break;
 884               case CS7: bits = 7; break;
 885               case CS8: bits = 8; break;
 886               /* Never happens, but GCC is too dumb to figure it out */
 887               default:  bits = 8; break;
 888         }
 889         sbits = bits - 5;
 890
 891         if (cflag & CSTOPB) {
 892                 cval |= SMCMR_SL;       /* Two stops */
 893                 scval |= SCU_PMSR_SL;
 894                 bits++;
 895         }
 896         if (cflag & PARENB) {
 897                 cval |= SMCMR_PEN;
 898                 scval |= SCU_PMSR_PEN;
 899                 bits++;
 900         }
 901         if (!(cflag & PARODD)) {
 902                 cval |= SMCMR_PM_EVEN;
 903                 scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP);
 904         }
 905
 906         /* Determine divisor based on baud rate */
 907         i = cflag & CBAUD;
 908         if (i >= (sizeof(baud_table)/sizeof(int)))
 909                 baud_rate = 9600;
 910         else
 911                 baud_rate = baud_table[i];
 912
 913         info->timeout = (TX_BUF_SIZE*HZ*bits);
 914         info->timeout += HZ/50;         /* Add .02 seconds of slop */
 915
 916 #ifdef modem_control
 917         /* CTS flow control flag and modem status interrupts */
 918         info->IER &= ~UART_IER_MSI;
 919         if (info->flags & ASYNC_HARDPPS_CD)
 920                 info->IER |= UART_IER_MSI;
 921         if (cflag & CRTSCTS) {
 922                 info->flags |= ASYNC_CTS_FLOW;
 923                 info->IER |= UART_IER_MSI;
 924         } else
 925                 info->flags &= ~ASYNC_CTS_FLOW;
 926         if (cflag & CLOCAL)
 927                 info->flags &= ~ASYNC_CHECK_CD;
 928         else {
 929                 info->flags |= ASYNC_CHECK_CD;
 930                 info->IER |= UART_IER_MSI;
 931         }
 932         serial_out(info, UART_IER, info->IER);
 933 #endif
 934
 935         /*
 936          * Set up parity check flag
 937          */
 938         info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
 939         if (I_INPCK(info->tty))
 940                 info->read_status_mask |= BD_SC_FR | BD_SC_PR;
 941         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 942                 info->read_status_mask |= BD_SC_BR;
 943
 944         /*
 945          * Characters to ignore
 946          */
 947         info->ignore_status_mask = 0;
 948         if (I_IGNPAR(info->tty))
 949                 info->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
 950         if (I_IGNBRK(info->tty)) {
 951                 info->ignore_status_mask |= BD_SC_BR;
 952                 /*
 953                  * If we're ignore parity and break indicators, ignore
 954                  * overruns too.  (For real raw support).
 955                  */
 956                 if (I_IGNPAR(info->tty))
 957                         info->ignore_status_mask |= BD_SC_OV;
 958         }
 959         /*
 960          * !!! ignore all characters if CREAD is not set
 961          */
 962         if ((cflag & CREAD) == 0)
 963          info->read_status_mask &= ~BD_SC_EMPTY;
 964          local_irq_save(flags);
 965
 966          /* Start bit has not been added (so don't, because we would just
 967           * subtract it later), and we need to add one for the number of
 968           * stops bits (there is always at least one).
 969           */
 970          bits++;
 971          idx = PORT_NUM(state->smc_scc_num);
 972          if (state->smc_scc_num & NUM_IS_SCC) {
 973          sccp = &pquicc->scc_regs[idx];
 974          sccp->scc_psmr = (sbits << 12) | scval;
 975      } else {
 976          smcp = &pquicc->smc_regs[idx];
 977
 978                 /* Set the mode register.  We want to keep a copy of the
 979                  * enables, because we want to put them back if they were
 980                  * present.
 981                  */
 982                 prev_mode = smcp->smc_smcmr;
 983                 smcp->smc_smcmr = smcr_mk_clen(bits) | cval |  SMCMR_SM_UART;
 984                 smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN));
 985         }
 986
 987         m360_cpm_setbrg((state - rs_table), baud_rate);
 988
 989         local_irq_restore(flags);
 990 }
 991
 992 static void rs_360_put_char(struct tty_struct *tty, unsigned char ch)
 993 {
 994         ser_info_t *info = (ser_info_t *)tty->driver_data;
 995         volatile QUICC_BD       *bdp;
 996
 997         if (serial_paranoia_check(info, tty->name, "rs_put_char"))
 998                 return;
 999
1000         if (!tty)
1001                 return;
1002
1003         bdp = info->tx_cur;
1004         while (bdp->status & BD_SC_READY);
1005
1006         /* *((char *)__va(bdp->buf)) = ch; */
1007         *((char *)bdp->buf) = ch;
1008         bdp->length = 1;
1009         bdp->status |= BD_SC_READY;
1010
1011         /* Get next BD.
1012         */
1013         if (bdp->status & BD_SC_WRAP)
1014                 bdp = info->tx_bd_base;
1015         else
1016                 bdp++;
1017
1018         info->tx_cur = (QUICC_BD *)bdp;
1019
1020 }
1021
1022 static int rs_360_write(struct tty_struct * tty,
1023                     const unsigned char *buf, int count)
1024 {
1025         int     c, ret = 0;
1026         ser_info_t *info = (ser_info_t *)tty->driver_data;
1027         volatile QUICC_BD *bdp;
1028
1029 #ifdef CONFIG_KGDB
1030         /* Try to let stub handle output. Returns true if it did. */
1031         if (kgdb_output_string(buf, count))
1032                 return ret;
1033 #endif
1034
1035         if (serial_paranoia_check(info, tty->name, "rs_write"))
1036                 return 0;
1037
1038         if (!tty)
1039                 return 0;
1040
1041         bdp = info->tx_cur;
1042
1043         while (1) {
1044                 c = min(count, TX_BUF_SIZE);
1045
1046                 if (c <= 0)
1047                         break;
1048
1049                 if (bdp->status & BD_SC_READY) {
1050                         info->flags |= TX_WAKEUP;
1051                         break;
1052                 }
1053
1054                 /* memcpy(__va(bdp->buf), buf, c); */
1055                 memcpy((void *)bdp->buf, buf, c);
1056
1057                 bdp->length = c;
1058                 bdp->status |= BD_SC_READY;
1059
1060                 buf += c;
1061                 count -= c;
1062                 ret += c;
1063
1064                 /* Get next BD.
1065                 */
1066                 if (bdp->status & BD_SC_WRAP)
1067                         bdp = info->tx_bd_base;
1068                 else
1069                         bdp++;
1070                 info->tx_cur = (QUICC_BD *)bdp;
1071         }
1072         return ret;
1073 }
1074
1075 static int rs_360_write_room(struct tty_struct *tty)
1076 {
1077         ser_info_t *info = (ser_info_t *)tty->driver_data;
1078         int     ret;
1079
1080         if (serial_paranoia_check(info, tty->name, "rs_write_room"))
1081                 return 0;
1082
1083         if ((info->tx_cur->status & BD_SC_READY) == 0) {
1084                 info->flags &= ~TX_WAKEUP;
1085                 ret = TX_BUF_SIZE;
1086         }
1087         else {
1088                 info->flags |= TX_WAKEUP;
1089                 ret = 0;
1090         }
1091         return ret;
1092 }
1093
1094 /* I could track this with transmit counters....maybe later.
1095 */
1096 static int rs_360_chars_in_buffer(struct tty_struct *tty)
1097 {
1098         ser_info_t *info = (ser_info_t *)tty->driver_data;
1099
1100         if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
1101                 return 0;
1102         return 0;
1103 }
1104
1105 static void rs_360_flush_buffer(struct tty_struct *tty)
1106 {
1107         ser_info_t *info = (ser_info_t *)tty->driver_data;
1108
1109         if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
1110                 return;
1111
1112         /* There is nothing to "flush", whatever we gave the CPM
1113          * is on its way out.
1114          */
1115         tty_wakeup(tty);
1116         info->flags &= ~TX_WAKEUP;
1117 }
1118
1119 /*
1120  * This function is used to send a high-priority XON/XOFF character to
1121  * the device
1122  */
1123 static void rs_360_send_xchar(struct tty_struct *tty, char ch)
1124 {
1125         volatile QUICC_BD       *bdp;
1126
1127         ser_info_t *info = (ser_info_t *)tty->driver_data;
1128
1129         if (serial_paranoia_check(info, tty->name, "rs_send_char"))
1130                 return;
1131
1132         bdp = info->tx_cur;
1133         while (bdp->status & BD_SC_READY);
1134
1135         /* *((char *)__va(bdp->buf)) = ch; */
1136         *((char *)bdp->buf) = ch;
1137         bdp->length = 1;
1138         bdp->status |= BD_SC_READY;
1139
1140         /* Get next BD.
1141         */
1142         if (bdp->status & BD_SC_WRAP)
1143                 bdp = info->tx_bd_base;
1144         else
1145                 bdp++;
1146
1147         info->tx_cur = (QUICC_BD *)bdp;
1148 }
1149
1150 /*
1151  * ------------------------------------------------------------
1152  * rs_throttle()
1153  *
1154  * This routine is called by the upper-layer tty layer to signal that
1155  * incoming characters should be throttled.
1156  * ------------------------------------------------------------
1157  */
1158 static void rs_360_throttle(struct tty_struct * tty)
1159 {
1160         ser_info_t *info = (ser_info_t *)tty->driver_data;
1161 #ifdef SERIAL_DEBUG_THROTTLE
1162         char    buf[64];
1163
1164         printk("throttle %s: %d....\n", _tty_name(tty, buf),
1165                tty->ldisc.chars_in_buffer(tty));
1166 #endif
1167
1168         if (serial_paranoia_check(info, tty->name, "rs_throttle"))
1169                 return;
1170
1171         if (I_IXOFF(tty))
1172                 rs_360_send_xchar(tty, STOP_CHAR(tty));
1173
1174 #ifdef modem_control
1175         if (tty->termios->c_cflag & CRTSCTS)
1176                 info->MCR &= ~UART_MCR_RTS;
1177
1178         local_irq_disable();
1179         serial_out(info, UART_MCR, info->MCR);
1180         local_irq_enable();
1181 #endif
1182 }
1183
1184 static void rs_360_unthrottle(struct tty_struct * tty)
1185 {
1186         ser_info_t *info = (ser_info_t *)tty->driver_data;
1187 #ifdef SERIAL_DEBUG_THROTTLE
1188         char    buf[64];
1189
1190         printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
1191                tty->ldisc.chars_in_buffer(tty));
1192 #endif
1193
1194         if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
1195                 return;
1196
1197         if (I_IXOFF(tty)) {
1198                 if (info->x_char)
1199                         info->x_char = 0;
1200                 else
1201                         rs_360_send_xchar(tty, START_CHAR(tty));
1202         }
1203 #ifdef modem_control
1204         if (tty->termios->c_cflag & CRTSCTS)
1205                 info->MCR |= UART_MCR_RTS;
1206         local_irq_disable();
1207         serial_out(info, UART_MCR, info->MCR);
1208         local_irq_enable();
1209 #endif
1210 }
1211
1212 /*
1213  * ------------------------------------------------------------
1214  * rs_ioctl() and friends
1215  * ------------------------------------------------------------
1216  */
1217
1218 #ifdef maybe
1219 /*
1220  * get_lsr_info - get line status register info
1221  *
1222  * Purpose: Let user call ioctl() to get info when the UART physically
1223  *          is emptied.  On bus types like RS485, the transmitter must
1224  *          release the bus after transmitting. This must be done when
1225  *          the transmit shift register is empty, not be done when the
1226  *          transmit holding register is empty.  This functionality
1227  *          allows an RS485 driver to be written in user space.
1228  */
1229 static int get_lsr_info(struct async_struct * info, unsigned int *value)
1230 {
1231         unsigned char status;
1232         unsigned int result;
1233
1234         local_irq_disable();
1235         status = serial_in(info, UART_LSR);
1236         local_irq_enable();
1237         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1238         return put_user(result,value);
1239 }
1240 #endif
1241
1242 static int rs_360_tiocmget(struct tty_struct *tty, struct file *file)
1243 {
1244         ser_info_t *info = (ser_info_t *)tty->driver_data;
1245         unsigned int result = 0;
1246 #ifdef modem_control
1247         unsigned char control, status;
1248
1249         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
1250                 return -ENODEV;
1251
1252         if (tty->flags & (1 << TTY_IO_ERROR))
1253                 return -EIO;
1254
1255         control = info->MCR;
1256         local_irq_disable();
1257         status = serial_in(info, UART_MSR);
1258         local_irq_enable();
1259         result =  ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1260                 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1261 #ifdef TIOCM_OUT1
1262                 | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
1263                 | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
1264 #endif
1265                 | ((status  & UART_MSR_DCD) ? TIOCM_CAR : 0)
1266                 | ((status  & UART_MSR_RI) ? TIOCM_RNG : 0)
1267                 | ((status  & UART_MSR_DSR) ? TIOCM_DSR : 0)
1268                 | ((status  & UART_MSR_CTS) ? TIOCM_CTS : 0);
1269 #endif
1270         return result;
1271 }
1272
1273 static int rs_360_tiocmset(struct tty_struct *tty, struct file *file,
1274                            unsigned int set, unsigned int clear)
1275 {
1276 #ifdef modem_control
1277         ser_info_t *info = (ser_info_t *)tty->driver_data;
1278         unsigned int arg;
1279
1280         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
1281                 return -ENODEV;
1282
1283         if (tty->flags & (1 << TTY_IO_ERROR))
1284                 return -EIO;
1285
1286         if (set & TIOCM_RTS)
1287                 info->mcr |= UART_MCR_RTS;
1288         if (set & TIOCM_DTR)
1289                 info->mcr |= UART_MCR_DTR;
1290         if (clear & TIOCM_RTS)
1291                 info->MCR &= ~UART_MCR_RTS;
1292         if (clear & TIOCM_DTR)
1293                 info->MCR &= ~UART_MCR_DTR;
1294
1295 #ifdef TIOCM_OUT1
1296         if (set & TIOCM_OUT1)
1297                 info->MCR |= UART_MCR_OUT1;
1298         if (set & TIOCM_OUT2)
1299                 info->MCR |= UART_MCR_OUT2;
1300         if (clear & TIOCM_OUT1)
1301                 info->MCR &= ~UART_MCR_OUT1;
1302         if (clear & TIOCM_OUT2)
1303                 info->MCR &= ~UART_MCR_OUT2;
1304 #endif
1305
1306         local_irq_disable();
1307         serial_out(info, UART_MCR, info->MCR);
1308         local_irq_enable();
1309 #endif
1310         return 0;
1311 }
1312
1313 /* Sending a break is a two step process on the SMC/SCC.  It is accomplished
1314  * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT
1315  * command.  We take advantage of the begin/end functions to make this
1316  * happen.
1317  */
1318 static ushort   smc_chan_map[] = {
1319         CPM_CR_CH_SMC1,
1320         CPM_CR_CH_SMC2
1321 };
1322
1323 static ushort   scc_chan_map[] = {
1324         CPM_CR_CH_SCC1,
1325         CPM_CR_CH_SCC2,
1326         CPM_CR_CH_SCC3,
1327         CPM_CR_CH_SCC4
1328 };
1329
1330 static void begin_break(ser_info_t *info)
1331 {
1332         volatile QUICC *cp;
1333         ushort  chan;
1334         int     idx;
1335
1336         cp = pquicc;
1337
1338         idx = PORT_NUM(info->state->smc_scc_num);
1339         if (info->state->smc_scc_num & NUM_IS_SCC)
1340                 chan = scc_chan_map[idx];
1341         else
1342                 chan = smc_chan_map[idx];
1343
1344         cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG;
1345         while (cp->cp_cr & CPM_CR_FLG);
1346 }
1347
1348 static void end_break(ser_info_t *info)
1349 {
1350         volatile QUICC *cp;
1351         ushort  chan;
1352         int idx;
1353
1354         cp = pquicc;
1355
1356         idx = PORT_NUM(info->state->smc_scc_num);
1357         if (info->state->smc_scc_num & NUM_IS_SCC)
1358                 chan = scc_chan_map[idx];
1359         else
1360                 chan = smc_chan_map[idx];
1361
1362         cp->cp_cr = mk_cr_cmd(chan, CPM_CR_RESTART_TX) | CPM_CR_FLG;
1363         while (cp->cp_cr & CPM_CR_FLG);
1364 }
1365
1366 /*
1367  * This routine sends a break character out the serial port.
1368  */
1369 static void send_break(ser_info_t *info, unsigned int duration)
1370 {
1371 #ifdef SERIAL_DEBUG_SEND_BREAK
1372         printk("rs_send_break(%d) jiff=%lu...", duration, jiffies);
1373 #endif
1374         begin_break(info);
1375         msleep_interruptible(duration);
1376         end_break(info);
1377 #ifdef SERIAL_DEBUG_SEND_BREAK
1378         printk("done jiffies=%lu\n", jiffies);
1379 #endif
1380 }
1381
1382
1383 static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
1384                     unsigned int cmd, unsigned long arg)
1385 {
1386         int error;
1387         ser_info_t *info = (ser_info_t *)tty->driver_data;
1388         int retval;
1389         struct async_icount cnow;
1390         /* struct async_icount_24 cnow;*/       /* kernel counter temps */
1391         struct serial_icounter_struct *p_cuser; /* user space */
1392
1393         if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1394                 return -ENODEV;
1395
1396         if ((cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1397                 if (tty->flags & (1 << TTY_IO_ERROR))
1398                     return -EIO;
1399         }
1400
1401         switch (cmd) {
1402                 case TCSBRK:    /* SVID version: non-zero arg --> no break */
1403                         retval = tty_check_change(tty);
1404                         if (retval)
1405                                 return retval;
1406                         tty_wait_until_sent(tty, 0);
1407                         if (signal_pending(current))
1408                                 return -EINTR;
1409                         if (!arg) {
1410                                 send_break(info, 250);  /* 1/4 second */
1411                                 if (signal_pending(current))
1412                                         return -EINTR;
1413                         }
1414                         return 0;
1415                 case TCSBRKP:   /* support for POSIX tcsendbreak() */
1416                         retval = tty_check_change(tty);
1417                         if (retval)
1418                                 return retval;
1419                         tty_wait_until_sent(tty, 0);
1420                         if (signal_pending(current))
1421                                 return -EINTR;
1422                         send_break(info, arg ? arg*100 : 250);
1423                         if (signal_pending(current))
1424                                 return -EINTR;
1425                         return 0;
1426                 case TIOCSBRK:
1427                         retval = tty_check_change(tty);
1428                         if (retval)
1429                                 return retval;
1430                         tty_wait_until_sent(tty, 0);
1431                         begin_break(info);
1432                         return 0;
1433                 case TIOCCBRK:
1434                         retval = tty_check_change(tty);
1435                         if (retval)
1436                                 return retval;
1437                         end_break(info);
1438                         return 0;
1439                 case TIOCGSOFTCAR:
1440                         /* return put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg); */
1441                         put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg);
1442                         return 0;
1443                 case TIOCSSOFTCAR:
1444                         error = get_user(arg, (unsigned int *) arg);
1445                         if (error)
1446                                 return error;
1447                         tty->termios->c_cflag =
1448                                 ((tty->termios->c_cflag & ~CLOCAL) |
1449                                  (arg ? CLOCAL : 0));
1450                         return 0;
1451 #ifdef maybe
1452                 case TIOCSERGETLSR: /* Get line status register */
1453                         return get_lsr_info(info, (unsigned int *) arg);
1454 #endif
1455                 /*
1456                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1457                  * - mask passed in arg for lines of interest
1458                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1459                  * Caller should use TIOCGICOUNT to see which one it was
1460                  */
1461                  case TIOCMIWAIT:
1462 #ifdef modem_control
1463                         local_irq_disable();
1464                         /* note the counters on entry */
1465                         cprev = info->state->icount;
1466                         local_irq_enable();
1467                         while (1) {
1468                                 interruptible_sleep_on(&info->delta_msr_wait);
1469                                 /* see if a signal did it */
1470                                 if (signal_pending(current))
1471                                         return -ERESTARTSYS;
1472                                 local_irq_disable();
1473                                 cnow = info->state->icount; /* atomic copy */
1474                                 local_irq_enable();
1475                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1476                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1477                                         return -EIO; /* no change => error */
1478                                 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1479                                      ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1480                                      ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1481                                      ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1482                                         return 0;
1483                                 }
1484                                 cprev = cnow;
1485                         }
1486                         /* NOTREACHED */
1487 #else
1488                         return 0;
1489 #endif
1490
1491                 /*
1492                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1493                  * Return: write counters to the user passed counter struct
1494                  * NB: both 1->0 and 0->1 transitions are counted except for
1495                  *     RI where only 0->1 is counted.
1496                  */
1497                 case TIOCGICOUNT:
1498                         local_irq_disable();
1499                         cnow = info->state->icount;
1500                         local_irq_enable();
1501                         p_cuser = (struct serial_icounter_struct *) arg;
1502 /*                      error = put_user(cnow.cts, &p_cuser->cts); */
1503 /*                      if (error) return error; */
1504 /*                      error = put_user(cnow.dsr, &p_cuser->dsr); */
1505 /*                      if (error) return error; */
1506 /*                      error = put_user(cnow.rng, &p_cuser->rng); */
1507 /*                      if (error) return error; */
1508 /*                      error = put_user(cnow.dcd, &p_cuser->dcd); */
1509 /*                      if (error) return error; */
1510
1511                         put_user(cnow.cts, &p_cuser->cts);
1512                         put_user(cnow.dsr, &p_cuser->dsr);
1513                         put_user(cnow.rng, &p_cuser->rng);
1514                         put_user(cnow.dcd, &p_cuser->dcd);
1515                         return 0;
1516
1517                 default:
1518                         return -ENOIOCTLCMD;
1519                 }
1520         return 0;
1521 }
1522
1523 /* FIX UP modem control here someday......
1524 */
1525 static void rs_360_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1526 {
1527         ser_info_t *info = (ser_info_t *)tty->driver_data;
1528
1529         change_speed(info);
1530
1531 #ifdef modem_control
1532         /* Handle transition to B0 status */
1533         if ((old_termios->c_cflag & CBAUD) &&
1534             !(tty->termios->c_cflag & CBAUD)) {
1535                 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
1536                 local_irq_disable();
1537                 serial_out(info, UART_MCR, info->MCR);
1538                 local_irq_enable();
1539         }
1540
1541         /* Handle transition away from B0 status */
1542         if (!(old_termios->c_cflag & CBAUD) &&
1543             (tty->termios->c_cflag & CBAUD)) {
1544                 info->MCR |= UART_MCR_DTR;
1545                 if (!tty->hw_stopped ||
1546                     !(tty->termios->c_cflag & CRTSCTS)) {
1547                         info->MCR |= UART_MCR_RTS;
1548                 }
1549                 local_irq_disable();
1550                 serial_out(info, UART_MCR, info->MCR);
1551                 local_irq_enable();
1552         }
1553
1554         /* Handle turning off CRTSCTS */
1555         if ((old_termios->c_cflag & CRTSCTS) &&
1556             !(tty->termios->c_cflag & CRTSCTS)) {
1557                 tty->hw_stopped = 0;
1558                 rs_360_start(tty);
1559         }
1560 #endif
1561
1562 #if 0
1563         /*
1564          * No need to wake up processes in open wait, since they
1565          * sample the CLOCAL flag once, and don't recheck it.
1566          * XXX  It's not clear whether the current behavior is correct
1567          * or not.  Hence, this may change.....
1568          */
1569         if (!(old_termios->c_cflag & CLOCAL) &&
1570             (tty->termios->c_cflag & CLOCAL))
1571                 wake_up_interruptible(&info->open_wait);
1572 #endif
1573 }
1574
1575 /*
1576  * ------------------------------------------------------------
1577  * rs_close()
1578  *
1579  * This routine is called when the serial port gets closed.  First, we
1580  * wait for the last remaining data to be sent.  Then, we unlink its
1581  * async structure from the interrupt chain if necessary, and we free
1582  * that IRQ if nothing is left in the chain.
1583  * ------------------------------------------------------------
1584  */
1585 static void rs_360_close(struct tty_struct *tty, struct file * filp)
1586 {
1587         ser_info_t *info = (ser_info_t *)tty->driver_data;
1588         /* struct async_state *state; */
1589         struct serial_state *state;
1590         unsigned long   flags;
1591         int             idx;
1592         volatile struct smc_regs        *smcp;
1593         volatile struct scc_regs        *sccp;
1594
1595         if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
1596                 return;
1597
1598         state = info->state;
1599
1600         local_irq_save(flags);
1601
1602         if (tty_hung_up_p(filp)) {
1603                 DBG_CNT("before DEC-hung");
1604                 local_irq_restore(flags);
1605                 return;
1606         }
1607
1608 #ifdef SERIAL_DEBUG_OPEN
1609         printk("rs_close ttys%d, count = %d\n", info->line, state->count);
1610 #endif
1611         if ((tty->count == 1) && (state->count != 1)) {
1612                 /*
1613                  * Uh, oh.  tty->count is 1, which means that the tty
1614                  * structure will be freed.  state->count should always
1615                  * be one in these conditions.  If it's greater than
1616                  * one, we've got real problems, since it means the
1617                  * serial port won't be shutdown.
1618                  */
1619                 printk("rs_close: bad serial port count; tty->count is 1, "
1620                        "state->count is %d\n", state->count);
1621                 state->count = 1;
1622         }
1623         if (--state->count < 0) {
1624                 printk("rs_close: bad serial port count for ttys%d: %d\n",
1625                        info->line, state->count);
1626                 state->count = 0;
1627         }
1628         if (state->count) {
1629                 DBG_CNT("before DEC-2");
1630                 local_irq_restore(flags);
1631                 return;
1632         }
1633         info->flags |= ASYNC_CLOSING;
1634         /*
1635          * Now we wait for the transmit buffer to clear; and we notify
1636          * the line discipline to only process XON/XOFF characters.
1637          */
1638         tty->closing = 1;
1639         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1640                 tty_wait_until_sent(tty, info->closing_wait);
1641         /*
1642          * At this point we stop accepting input.  To do this, we
1643          * disable the receive line status interrupts, and tell the
1644          * interrupt driver to stop checking the data ready bit in the
1645          * line status register.
1646          */
1647         info->read_status_mask &= ~BD_SC_EMPTY;
1648         if (info->flags & ASYNC_INITIALIZED) {
1649
1650                 idx = PORT_NUM(info->state->smc_scc_num);
1651                 if (info->state->smc_scc_num & NUM_IS_SCC) {
1652                         sccp = &pquicc->scc_regs[idx];
1653                         sccp->scc_sccm &= ~UART_SCCM_RX;
1654                         sccp->scc_gsmr.w.low &= ~SCC_GSMRL_ENR;
1655                 } else {
1656                         smcp = &pquicc->smc_regs[idx];
1657                         smcp->smc_smcm &= ~SMCM_RX;
1658                         smcp->smc_smcmr &= ~SMCMR_REN;
1659                 }
1660                 /*
1661                  * Before we drop DTR, make sure the UART transmitter
1662                  * has completely drained; this is especially
1663                  * important if there is a transmit FIFO!
1664                  */
1665                 rs_360_wait_until_sent(tty, info->timeout);
1666         }
1667         shutdown(info);
1668         if (tty->driver->flush_buffer)
1669                 tty->driver->flush_buffer(tty);
1670         tty_ldisc_flush(tty);
1671         tty->closing = 0;
1672         info->event = 0;
1673         info->tty = 0;
1674         if (info->blocked_open) {
1675                 if (info->close_delay) {
1676                         msleep_interruptible(jiffies_to_msecs(info->close_delay));
1677                 }
1678                 wake_up_interruptible(&info->open_wait);
1679         }
1680         info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1681         wake_up_interruptible(&info->close_wait);
1682         local_irq_restore(flags);
1683 }
1684
1685 /*
1686  * rs_wait_until_sent() --- wait until the transmitter is empty
1687  */
1688 static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout)
1689 {
1690         ser_info_t *info = (ser_info_t *)tty->driver_data;
1691         unsigned long orig_jiffies, char_time;
1692         /*int lsr;*/
1693         volatile QUICC_BD *bdp;
1694
1695         if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
1696                 return;
1697
1698 #ifdef maybe
1699         if (info->state->type == PORT_UNKNOWN)
1700                 return;
1701 #endif
1702
1703         orig_jiffies = jiffies;
1704         /*
1705          * Set the check interval to be 1/5 of the estimated time to
1706          * send a single character, and make it at least 1.  The check
1707          * interval should also be less than the timeout.
1708          *
1709          * Note: we have to use pretty tight timings here to satisfy
1710          * the NIST-PCTS.
1711          */
1712         char_time = 1;
1713         if (timeout)
1714                 char_time = min(char_time, (unsigned long)timeout);
1715 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1716         printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1717         printk("jiff=%lu...", jiffies);
1718 #endif
1719
1720         /* We go through the loop at least once because we can't tell
1721          * exactly when the last character exits the shifter.  There can
1722          * be at least two characters waiting to be sent after the buffers
1723          * are empty.
1724          */
1725         do {
1726 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1727                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1728 #endif
1729 /*              current->counter = 0;    make us low-priority */
1730                 msleep_interruptible(jiffies_to_msecs(char_time));
1731                 if (signal_pending(current))
1732                         break;
1733                 if (timeout && (time_after(jiffies, orig_jiffies + timeout)))
1734                         break;
1735                 /* The 'tx_cur' is really the next buffer to send.  We
1736                  * have to back up to the previous BD and wait for it
1737                  * to go.  This isn't perfect, because all this indicates
1738                  * is the buffer is available.  There are still characters
1739                  * in the CPM FIFO.
1740                  */
1741                 bdp = info->tx_cur;
1742                 if (bdp == info->tx_bd_base)
1743                         bdp += (TX_NUM_FIFO-1);
1744                 else
1745                         bdp--;
1746         } while (bdp->status & BD_SC_READY);
1747         current->state = TASK_RUNNING;
1748 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1749         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1750 #endif
1751 }
1752
1753 /*
1754  * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
1755  */
1756 static void rs_360_hangup(struct tty_struct *tty)
1757 {
1758         ser_info_t *info = (ser_info_t *)tty->driver_data;
1759         struct serial_state *state = info->state;
1760
1761         if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1762                 return;
1763
1764         state = info->state;
1765
1766         rs_360_flush_buffer(tty);
1767         shutdown(info);
1768         info->event = 0;
1769         state->count = 0;
1770         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1771         info->tty = 0;
1772         wake_up_interruptible(&info->open_wait);
1773 }
1774
1775 /*
1776  * ------------------------------------------------------------
1777  * rs_open() and friends
1778  * ------------------------------------------------------------
1779  */
1780 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1781                            ser_info_t *info)
1782 {
1783 #ifdef DO_THIS_LATER
1784         DECLARE_WAITQUEUE(wait, current);
1785 #endif
1786         struct serial_state *state = info->state;
1787         int             retval;
1788         int             do_clocal = 0;
1789
1790         /*
1791          * If the device is in the middle of being closed, then block
1792          * until it's done, and then try again.
1793          */
1794         if (tty_hung_up_p(filp) ||
1795             (info->flags & ASYNC_CLOSING)) {
1796                 if (info->flags & ASYNC_CLOSING)
1797                         interruptible_sleep_on(&info->close_wait);
1798 #ifdef SERIAL_DO_RESTART
1799                 if (info->flags & ASYNC_HUP_NOTIFY)
1800                         return -EAGAIN;
1801                 else
1802                         return -ERESTARTSYS;
1803 #else
1804                 return -EAGAIN;
1805 #endif
1806         }
1807
1808         /*
1809          * If non-blocking mode is set, or the port is not enabled,
1810          * then make the check up front and then exit.
1811          * If this is an SMC port, we don't have modem control to wait
1812          * for, so just get out here.
1813          */
1814         if ((filp->f_flags & O_NONBLOCK) ||
1815             (tty->flags & (1 << TTY_IO_ERROR)) ||
1816             !(info->state->smc_scc_num & NUM_IS_SCC)) {
1817                 info->flags |= ASYNC_NORMAL_ACTIVE;
1818                 return 0;
1819         }
1820
1821         if (tty->termios->c_cflag & CLOCAL)
1822                 do_clocal = 1;
1823
1824         /*
1825          * Block waiting for the carrier detect and the line to become
1826          * free (i.e., not in use by the callout).  While we are in
1827          * this loop, state->count is dropped by one, so that
1828          * rs_close() knows when to free things.  We restore it upon
1829          * exit, either normal or abnormal.
1830          */
1831         retval = 0;
1832 #ifdef DO_THIS_LATER
1833         add_wait_queue(&info->open_wait, &wait);
1834 #ifdef SERIAL_DEBUG_OPEN
1835         printk("block_til_ready before block: ttys%d, count = %d\n",
1836                state->line, state->count);
1837 #endif
1838         local_irq_disable();
1839         if (!tty_hung_up_p(filp))
1840                 state->count--;
1841         local_irq_enable();
1842         info->blocked_open++;
1843         while (1) {
1844                 local_irq_disable();
1845                 if (tty->termios->c_cflag & CBAUD)
1846                         serial_out(info, UART_MCR,
1847                                    serial_inp(info, UART_MCR) |
1848                                    (UART_MCR_DTR | UART_MCR_RTS));
1849                 local_irq_enable();
1850                 set_current_state(TASK_INTERRUPTIBLE);
1851                 if (tty_hung_up_p(filp) ||
1852                     !(info->flags & ASYNC_INITIALIZED)) {
1853 #ifdef SERIAL_DO_RESTART
1854                         if (info->flags & ASYNC_HUP_NOTIFY)
1855                                 retval = -EAGAIN;
1856                         else
1857                                 retval = -ERESTARTSYS;
1858 #else
1859                         retval = -EAGAIN;
1860 #endif
1861                         break;
1862                 }
1863                 if (!(info->flags & ASYNC_CLOSING) &&
1864                     (do_clocal || (serial_in(info, UART_MSR) &
1865                                    UART_MSR_DCD)))
1866                         break;
1867                 if (signal_pending(current)) {
1868                         retval = -ERESTARTSYS;
1869                         break;
1870                 }
1871 #ifdef SERIAL_DEBUG_OPEN
1872                 printk("block_til_ready blocking: ttys%d, count = %d\n",
1873                        info->line, state->count);
1874 #endif
1875                 schedule();
1876         }
1877         current->state = TASK_RUNNING;
1878         remove_wait_queue(&info->open_wait, &wait);
1879         if (!tty_hung_up_p(filp))
1880                 state->count++;
1881         info->blocked_open--;
1882 #ifdef SERIAL_DEBUG_OPEN
1883         printk("block_til_ready after blocking: ttys%d, count = %d\n",
1884                info->line, state->count);
1885 #endif
1886 #endif /* DO_THIS_LATER */
1887         if (retval)
1888                 return retval;
1889         info->flags |= ASYNC_NORMAL_ACTIVE;
1890         return 0;
1891 }
1892
1893 static int get_async_struct(int line, ser_info_t **ret_info)
1894 {
1895         struct serial_state *sstate;
1896
1897         sstate = rs_table + line;
1898         if (sstate->info) {
1899                 sstate->count++;
1900                 *ret_info = (ser_info_t *)sstate->info;
1901                 return 0;
1902         }
1903         else {
1904                 return -ENOMEM;
1905         }
1906 }
1907
1908 /*
1909  * This routine is called whenever a serial port is opened.  It
1910  * enables interrupts for a serial port, linking in its async structure into
1911  * the IRQ chain.   It also performs the serial-specific
1912  * initialization for the tty structure.
1913  */
1914 static int rs_360_open(struct tty_struct *tty, struct file * filp)
1915 {
1916         ser_info_t      *info;
1917         int             retval, line;
1918
1919         line = tty->index;
1920         if ((line < 0) || (line >= NR_PORTS))
1921                 return -ENODEV;
1922         retval = get_async_struct(line, &info);
1923         if (retval)
1924                 return retval;
1925         if (serial_paranoia_check(info, tty->name, "rs_open"))
1926                 return -ENODEV;
1927
1928 #ifdef SERIAL_DEBUG_OPEN
1929         printk("rs_open %s, count = %d\n", tty->name, info->state->count);
1930 #endif
1931         tty->driver_data = info;
1932         info->tty = tty;
1933
1934         /*
1935          * Start up serial port
1936          */
1937         retval = startup(info);
1938         if (retval)
1939                 return retval;
1940
1941         retval = block_til_ready(tty, filp, info);
1942         if (retval) {
1943 #ifdef SERIAL_DEBUG_OPEN
1944                 printk("rs_open returning after block_til_ready with %d\n",
1945                        retval);
1946 #endif
1947                 return retval;
1948         }
1949
1950 #ifdef SERIAL_DEBUG_OPEN
1951         printk("rs_open %s successful...", tty->name);
1952 #endif
1953         return 0;
1954 }
1955
1956 /*
1957  * /proc fs routines....
1958  */
1959
1960 static inline int line_info(char *buf, struct serial_state *state)
1961 {
1962 #ifdef notdef
1963         struct async_struct *info = state->info, scr_info;
1964         char    stat_buf[30], control, status;
1965 #endif
1966         int     ret;
1967
1968         ret = sprintf(buf, "%d: uart:%s port:%X irq:%d",
1969                       state->line,
1970                       (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC",
1971                       (unsigned int)(state->port), state->irq);
1972
1973         if (!state->port || (state->type == PORT_UNKNOWN)) {
1974                 ret += sprintf(buf+ret, "\n");
1975                 return ret;
1976         }
1977
1978 #ifdef notdef
1979         /*
1980          * Figure out the current RS-232 lines
1981          */
1982         if (!info) {
1983                 info = &scr_info;       /* This is just for serial_{in,out} */
1984
1985                 info->magic = SERIAL_MAGIC;
1986                 info->port = state->port;
1987                 info->flags = state->flags;
1988                 info->quot = 0;
1989                 info->tty = 0;
1990         }
1991         local_irq_disable();
1992         status = serial_in(info, UART_MSR);
1993         control = info ? info->MCR : serial_in(info, UART_MCR);
1994         local_irq_enable();
1995
1996         stat_buf[0] = 0;
1997         stat_buf[1] = 0;
1998         if (control & UART_MCR_RTS)
1999                 strcat(stat_buf, "|RTS");
2000         if (status & UART_MSR_CTS)
2001                 strcat(stat_buf, "|CTS");
2002         if (control & UART_MCR_DTR)
2003                 strcat(stat_buf, "|DTR");
2004         if (status & UART_MSR_DSR)
2005                 strcat(stat_buf, "|DSR");
2006         if (status & UART_MSR_DCD)
2007                 strcat(stat_buf, "|CD");
2008         if (status & UART_MSR_RI)
2009                 strcat(stat_buf, "|RI");
2010
2011         if (info->quot) {
2012                 ret += sprintf(buf+ret, " baud:%d",
2013                                state->baud_base / info->quot);
2014         }
2015
2016         ret += sprintf(buf+ret, " tx:%d rx:%d",
2017                       state->icount.tx, state->icount.rx);
2018
2019         if (state->icount.frame)
2020                 ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
2021
2022         if (state->icount.parity)
2023                 ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
2024
2025         if (state->icount.brk)
2026                 ret += sprintf(buf+ret, " brk:%d", state->icount.brk);
2027
2028         if (state->icount.overrun)
2029                 ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
2030
2031         /*
2032          * Last thing is the RS-232 status lines
2033          */
2034         ret += sprintf(buf+ret, " %s\n", stat_buf+1);
2035 #endif
2036         return ret;
2037 }
2038
2039 int rs_360_read_proc(char *page, char **start, off_t off, int count,
2040                  int *eof, void *data)
2041 {
2042         int i, len = 0;
2043         off_t   begin = 0;
2044
2045         len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version);
2046         for (i = 0; i < NR_PORTS && len < 4000; i++) {
2047                 len += line_info(page + len, &rs_table[i]);
2048                 if (len+begin > off+count)
2049                         goto done;
2050                 if (len+begin < off) {
2051                         begin += len;
2052                         len = 0;
2053                 }
2054         }
2055         *eof = 1;
2056 done:
2057         if (off >= len+begin)
2058                 return 0;
2059         *start = page + (begin-off);
2060         return ((count < begin+len-off) ? count : begin+len-off);
2061 }
2062
2063 /*
2064  * ---------------------------------------------------------------------
2065  * rs_init() and friends
2066  *
2067  * rs_init() is called at boot-time to initialize the serial driver.
2068  * ---------------------------------------------------------------------
2069  */
2070
2071 /*
2072  * This routine prints out the appropriate serial driver version
2073  * number, and identifies which options were configured into this
2074  * driver.
2075  */
2076 static _INLINE_ void show_serial_version(void)
2077 {
2078         printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
2079 }
2080
2081
2082 /*
2083  * The serial console driver used during boot.  Note that these names
2084  * clash with those found in "serial.c", so we currently can't support
2085  * the 16xxx uarts and these at the same time.  I will fix this to become
2086  * an indirect function call from tty_io.c (or something).
2087  */
2088
2089 #ifdef CONFIG_SERIAL_CONSOLE
2090
2091 /*
2092  * Print a string to the serial port trying not to disturb any possible
2093  * real use of the port...
2094  */
2095 static void my_console_write(int idx, const char *s,
2096                                 unsigned count)
2097 {
2098         struct          serial_state    *ser;
2099         ser_info_t              *info;
2100         unsigned                i;
2101         QUICC_BD                *bdp, *bdbase;
2102         volatile struct smc_uart_pram   *up;
2103         volatile        u_char          *cp;
2104
2105         ser = rs_table + idx;
2106
2107
2108         /* If the port has been initialized for general use, we have
2109          * to use the buffer descriptors allocated there.  Otherwise,
2110          * we simply use the single buffer allocated.
2111          */
2112         if ((info = (ser_info_t *)ser->info) != NULL) {
2113                 bdp = info->tx_cur;
2114                 bdbase = info->tx_bd_base;
2115         }
2116         else {
2117                 /* Pointer to UART in parameter ram.
2118                 */
2119                 /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
2120                 up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
2121
2122                 /* Get the address of the host memory buffer.
2123                  */
2124                 bdp = bdbase = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
2125         }
2126
2127         /*
2128          * We need to gracefully shut down the transmitter, disable
2129          * interrupts, then send our bytes out.
2130          */
2131
2132         /*
2133          * Now, do each character.  This is not as bad as it looks
2134          * since this is a holding FIFO and not a transmitting FIFO.
2135          * We could add the complexity of filling the entire transmit
2136          * buffer, but we would just wait longer between accesses......
2137          */
2138         for (i = 0; i < count; i++, s++) {
2139                 /* Wait for transmitter fifo to empty.
2140                  * Ready indicates output is ready, and xmt is doing
2141                  * that, not that it is ready for us to send.
2142                  */
2143                 while (bdp->status & BD_SC_READY);
2144
2145                 /* Send the character out.
2146                  */
2147                 cp = bdp->buf;
2148                 *cp = *s;
2149
2150                 bdp->length = 1;
2151                 bdp->status |= BD_SC_READY;
2152
2153                 if (bdp->status & BD_SC_WRAP)
2154                         bdp = bdbase;
2155                 else
2156                         bdp++;
2157
2158                 /* if a LF, also do CR... */
2159                 if (*s == 10) {
2160                         while (bdp->status & BD_SC_READY);
2161                         /* cp = __va(bdp->buf); */
2162                         cp = bdp->buf;
2163                         *cp = 13;
2164                         bdp->length = 1;
2165                         bdp->status |= BD_SC_READY;
2166
2167                         if (bdp->status & BD_SC_WRAP) {
2168                                 bdp = bdbase;
2169                         }
2170                         else {
2171                                 bdp++;
2172                         }
2173                 }
2174         }
2175
2176         /*
2177          * Finally, Wait for transmitter & holding register to empty
2178          *  and restore the IER
2179          */
2180         while (bdp->status & BD_SC_READY);
2181
2182         if (info)
2183                 info->tx_cur = (QUICC_BD *)bdp;
2184 }
2185
2186 static void serial_console_write(struct console *c, const char *s,
2187                                 unsigned count)
2188 {
2189 #ifdef CONFIG_KGDB
2190         /* Try to let stub handle output. Returns true if it did. */
2191         if (kgdb_output_string(s, count))
2192                 return;
2193 #endif
2194         my_console_write(c->index, s, count);
2195 }
2196
2197
2198
2199 /*void console_print_68360(const char *p)
2200 {
2201         const char *cp = p;
2202         int i;
2203
2204         for (i=0;cp[i]!=0;i++);
2205
2206         serial_console_write (p, i);
2207
2208         //Comment this if you want to have a strict interrupt-driven output
2209         //rs_fair_output();
2210
2211         return;
2212 }*/
2213
2214
2215
2216
2217
2218
2219 #ifdef CONFIG_XMON
2220 int
2221 xmon_360_write(const char *s, unsigned count)
2222 {
2223         my_console_write(0, s, count);
2224         return(count);
2225 }
2226 #endif
2227
2228 #ifdef CONFIG_KGDB
2229 void
2230 putDebugChar(char ch)
2231 {
2232         my_console_write(0, &ch, 1);
2233 }
2234 #endif
2235
2236 /*
2237  * Receive character from the serial port.  This only works well
2238  * before the port is initialized for real use.
2239  */
2240 static int my_console_wait_key(int idx, int xmon, char *obuf)
2241 {
2242         struct serial_state             *ser;
2243         u_char                  c, *cp;
2244         ser_info_t              *info;
2245         QUICC_BD                *bdp;
2246         volatile struct smc_uart_pram   *up;
2247         int                             i;
2248
2249         ser = rs_table + idx;
2250
2251         /* Get the address of the host memory buffer.
2252          * If the port has been initialized for general use, we must
2253          * use information from the port structure.
2254          */
2255         if ((info = (ser_info_t *)ser->info))
2256                 bdp = info->rx_cur;
2257         else
2258                 /* bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; */
2259                 bdp = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
2260
2261         /* Pointer to UART in parameter ram.
2262          */
2263         /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
2264         up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
2265
2266         /*
2267          * We need to gracefully shut down the receiver, disable
2268          * interrupts, then read the input.
2269          * XMON just wants a poll.  If no character, return -1, else
2270          * return the character.
2271          */
2272         if (!xmon) {
2273                 while (bdp->status & BD_SC_EMPTY);
2274         }
2275         else {
2276                 if (bdp->status & BD_SC_EMPTY)
2277                         return -1;
2278         }
2279
2280         cp = (char *)bdp->buf;
2281
2282         if (obuf) {
2283                 i = c = bdp->length;
2284                 while (i-- > 0)
2285                         *obuf++ = *cp++;
2286         }
2287         else {
2288                 c = *cp;
2289         }
2290         bdp->status |= BD_SC_EMPTY;
2291
2292         if (info) {
2293                 if (bdp->status & BD_SC_WRAP) {
2294                         bdp = info->rx_bd_base;
2295                 }
2296                 else {
2297                         bdp++;
2298                 }
2299                 info->rx_cur = (QUICC_BD *)bdp;
2300         }
2301
2302         return((int)c);
2303 }
2304
2305 static int serial_console_wait_key(struct console *co)
2306 {
2307         return(my_console_wait_key(co->index, 0, NULL));
2308 }
2309
2310 #ifdef CONFIG_XMON
2311 int
2312 xmon_360_read_poll(void)
2313 {
2314         return(my_console_wait_key(0, 1, NULL));
2315 }
2316
2317 int
2318 xmon_360_read_char(void)
2319 {
2320         return(my_console_wait_key(0, 0, NULL));
2321 }
2322 #endif
2323
2324 #ifdef CONFIG_KGDB
2325 static char kgdb_buf[RX_BUF_SIZE], *kgdp;
2326 static int kgdb_chars;
2327
2328 unsigned char
2329 getDebugChar(void)
2330 {
2331         if (kgdb_chars <= 0) {
2332                 kgdb_chars = my_console_wait_key(0, 0, kgdb_buf);
2333                 kgdp = kgdb_buf;
2334         }
2335         kgdb_chars--;
2336
2337         return(*kgdp++);
2338 }
2339
2340 void kgdb_interruptible(int state)
2341 {
2342 }
2343 void kgdb_map_scc(void)
2344 {
2345         struct          serial_state *ser;
2346         uint            mem_addr;
2347         volatile        QUICC_BD                *bdp;
2348         volatile        smc_uart_t      *up;
2349
2350         cpmp = (cpm360_t *)&(((immap_t *)IMAP_ADDR)->im_cpm);
2351
2352         /* To avoid data cache CPM DMA coherency problems, allocate a
2353          * buffer in the CPM DPRAM.  This will work until the CPM and
2354          * serial ports are initialized.  At that time a memory buffer
2355          * will be allocated.
2356          * The port is already initialized from the boot procedure, all
2357          * we do here is give it a different buffer and make it a FIFO.
2358          */
2359
2360         ser = rs_table;
2361
2362         /* Right now, assume we are using SMCs.
2363         */
2364         up = (smc_uart_t *)&cpmp->cp_dparam[ser->port];
2365
2366         /* Allocate space for an input FIFO, plus a few bytes for output.
2367          * Allocate bytes to maintain word alignment.
2368          */
2369         mem_addr = (uint)(&cpmp->cp_dpmem[0x1000]);
2370
2371         /* Set the physical address of the host memory buffers in
2372          * the buffer descriptors.
2373          */
2374         bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase];
2375         bdp->buf = mem_addr;
2376
2377         bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_tbase];
2378         bdp->buf = mem_addr+RX_BUF_SIZE;
2379
2380         up->smc_mrblr = RX_BUF_SIZE;            /* receive buffer length */
2381         up->smc_maxidl = RX_BUF_SIZE;
2382 }
2383 #endif
2384
2385 static struct tty_struct *serial_console_device(struct console *c, int *index)
2386 {
2387         *index = c->index;
2388         return serial_driver;
2389 }
2390
2391
2392 struct console sercons = {
2393         .name           = "ttyS",
2394         .write          = serial_console_write,
2395         .device         = serial_console_device,
2396         .wait_key       = serial_console_wait_key,
2397         .setup          = serial_console_setup,
2398         .flags          = CON_PRINTBUFFER,
2399         .index          = CONFIG_SERIAL_CONSOLE_PORT,
2400 };
2401
2402
2403
2404 /*
2405  *      Register console.
2406  */
2407 long console_360_init(long kmem_start, long kmem_end)
2408 {
2409         register_console(&sercons);
2410         /*register_console (console_print_68360); - 2.0.38 only required a write
2411       function pointer. */
2412         return kmem_start;
2413 }
2414
2415 #endif
2416
2417 /* Index in baud rate table of the default console baud rate.
2418 */
2419 static  int     baud_idx;
2420
2421 static const struct tty_operations rs_360_ops = {
2422         .owner = THIS_MODULE,
2423         .open = rs_360_open,
2424         .close = rs_360_close,
2425         .write = rs_360_write,
2426         .put_char = rs_360_put_char,
2427         .write_room = rs_360_write_room,
2428         .chars_in_buffer = rs_360_chars_in_buffer,
2429         .flush_buffer = rs_360_flush_buffer,
2430         .ioctl = rs_360_ioctl,
2431         .throttle = rs_360_throttle,
2432         .unthrottle = rs_360_unthrottle,
2433         /* .send_xchar = rs_360_send_xchar, */
2434         .set_termios = rs_360_set_termios,
2435         .stop = rs_360_stop,
2436         .start = rs_360_start,
2437         .hangup = rs_360_hangup,
2438         /* .wait_until_sent = rs_360_wait_until_sent, */
2439         /* .read_proc = rs_360_read_proc, */
2440         .tiocmget = rs_360_tiocmget,
2441         .tiocmset = rs_360_tiocmset,
2442 };
2443
2444 static int __init rs_360_init(void)
2445 {
2446         struct serial_state * state;
2447         ser_info_t      *info;
2448         void       *mem_addr;
2449         uint            dp_addr, iobits;
2450         int                 i, j, idx;
2451         ushort          chan;
2452         QUICC_BD        *bdp;
2453         volatile        QUICC           *cp;
2454         volatile        struct smc_regs *sp;
2455         volatile        struct smc_uart_pram    *up;
2456         volatile        struct scc_regs *scp;
2457         volatile        struct uart_pram        *sup;
2458         /* volatile     immap_t         *immap; */
2459
2460         serial_driver = alloc_tty_driver(NR_PORTS);
2461         if (!serial_driver)
2462                 return -1;
2463
2464         show_serial_version();
2465
2466         serial_driver->name = "ttyS";
2467         serial_driver->major = TTY_MAJOR;
2468         serial_driver->minor_start = 64;
2469         serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2470         serial_driver->subtype = SERIAL_TYPE_NORMAL;
2471         serial_driver->init_termios = tty_std_termios;
2472         serial_driver->init_termios.c_cflag =
2473                 baud_idx | CS8 | CREAD | HUPCL | CLOCAL;
2474         serial_driver->flags = TTY_DRIVER_REAL_RAW;
2475         tty_set_operations(serial_driver, &rs_360_ops);
2476
2477         if (tty_register_driver(serial_driver))
2478                 panic("Couldn't register serial driver\n");
2479
2480         cp = pquicc;    /* Get pointer to Communication Processor */
2481         /* immap = (immap_t *)IMAP_ADDR; */     /* and to internal registers */
2482
2483
2484         /* Configure SCC2, SCC3, and SCC4 instead of port A parallel I/O.
2485          */
2486         /* The "standard" configuration through the 860.
2487         */
2488 /*      immap->im_ioport.iop_papar |= 0x00fc; */
2489 /*      immap->im_ioport.iop_padir &= ~0x00fc; */
2490 /*      immap->im_ioport.iop_paodr &= ~0x00fc; */
2491         cp->pio_papar |= 0x00fc;
2492         cp->pio_padir &= ~0x00fc;
2493         /* cp->pio_paodr &= ~0x00fc; */
2494
2495
2496         /* Since we don't yet do modem control, connect the port C pins
2497          * as general purpose I/O.  This will assert CTS and CD for the
2498          * SCC ports.
2499          */
2500         /* FIXME: see 360um p.7-365 and 860um p.34-12
2501          * I can't make sense of these bits - mleslie*/
2502 /*      immap->im_ioport.iop_pcdir |= 0x03c6; */
2503 /*      immap->im_ioport.iop_pcpar &= ~0x03c6; */
2504
2505 /*      cp->pio_pcdir |= 0x03c6; */
2506 /*      cp->pio_pcpar &= ~0x03c6; */
2507
2508
2509
2510         /* Connect SCC2 and SCC3 to NMSI.  Connect BRG3 to SCC2 and
2511          * BRG4 to SCC3.
2512          */
2513         cp->si_sicr &= ~0x00ffff00;
2514         cp->si_sicr |=  0x001b1200;
2515
2516 #ifdef CONFIG_PP04
2517         /* Frequentis PP04 forced to RS-232 until we know better.
2518          * Port C 12 and 13 low enables RS-232 on SCC3 and SCC4.
2519          */
2520         immap->im_ioport.iop_pcdir |= 0x000c;
2521         immap->im_ioport.iop_pcpar &= ~0x000c;
2522         immap->im_ioport.iop_pcdat &= ~0x000c;
2523
2524         /* This enables the TX driver.
2525         */
2526         cp->cp_pbpar &= ~0x6000;
2527         cp->cp_pbdat &= ~0x6000;
2528 #endif
2529
2530         for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
2531                 state->magic = SSTATE_MAGIC;
2532                 state->line = i;
2533                 state->type = PORT_UNKNOWN;
2534                 state->custom_divisor = 0;
2535                 state->close_delay = 5*HZ/10;
2536                 state->closing_wait = 30*HZ;
2537                 state->icount.cts = state->icount.dsr =
2538                         state->icount.rng = state->icount.dcd = 0;
2539                 state->icount.rx = state->icount.tx = 0;
2540                 state->icount.frame = state->icount.parity = 0;
2541                 state->icount.overrun = state->icount.brk = 0;
2542                 printk(KERN_INFO "ttyS%d at irq 0x%02x is an %s\n",
2543                        i, (unsigned int)(state->irq),
2544                        (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC");
2545
2546 #ifdef CONFIG_SERIAL_CONSOLE
2547                 /* If we just printed the message on the console port, and
2548                  * we are about to initialize it for general use, we have
2549                  * to wait a couple of character times for the CR/NL to
2550                  * make it out of the transmit buffer.
2551                  */
2552                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2553                         mdelay(8);
2554
2555
2556 /*              idx = PORT_NUM(info->state->smc_scc_num); */
2557 /*              if (info->state->smc_scc_num & NUM_IS_SCC) */
2558 /*                      chan = scc_chan_map[idx]; */
2559 /*              else */
2560 /*                      chan = smc_chan_map[idx]; */
2561
2562 /*              cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; */
2563 /*              while (cp->cp_cr & CPM_CR_FLG); */
2564
2565 #endif
2566                 /* info = kmalloc(sizeof(ser_info_t), GFP_KERNEL); */
2567                 info = &quicc_ser_info[i];
2568                 if (info) {
2569                         memset (info, 0, sizeof(ser_info_t));
2570                         info->magic = SERIAL_MAGIC;
2571                         info->line = i;
2572                         info->flags = state->flags;
2573                         INIT_WORK(&info->tqueue, do_softint, info);
2574                         INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info);
2575                         init_waitqueue_head(&info->open_wait);
2576                         init_waitqueue_head(&info->close_wait);
2577                         info->state = state;
2578                         state->info = (struct async_struct *)info;
2579
2580                         /* We need to allocate a transmit and receive buffer
2581                          * descriptors from dual port ram, and a character
2582                          * buffer area from host mem.
2583                          */
2584                         dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * RX_NUM_FIFO);
2585
2586                         /* Allocate space for FIFOs in the host memory.
2587                          *  (for now this is from a static array of buffers :(
2588                          */
2589                         /* mem_addr = m360_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE); */
2590                         /* mem_addr = kmalloc (RX_NUM_FIFO * RX_BUF_SIZE, GFP_BUFFER); */
2591                         mem_addr = &rx_buf_pool[i * RX_NUM_FIFO * RX_BUF_SIZE];
2592
2593                         /* Set the physical address of the host memory
2594                          * buffers in the buffer descriptors, and the
2595                          * virtual address for us to work with.
2596                          */
2597                         bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2598                         info->rx_cur = info->rx_bd_base = bdp;
2599
2600                         /* initialize rx buffer descriptors */
2601                         for (j=0; j<(RX_NUM_FIFO-1); j++) {
2602                                 bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
2603                                 bdp->status = BD_SC_EMPTY | BD_SC_INTRPT;
2604                                 mem_addr += RX_BUF_SIZE;
2605                                 bdp++;
2606                         }
2607                         bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
2608                         bdp->status = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT;
2609
2610
2611                         idx = PORT_NUM(info->state->smc_scc_num);
2612                         if (info->state->smc_scc_num & NUM_IS_SCC) {
2613
2614 #if defined (CONFIG_UCQUICC) && 1
2615                                 /* set the transceiver mode to RS232 */
2616                                 sipex_mode_bits &= ~(uint)SIPEX_MODE(idx,0x0f); /* clear current mode */
2617                                 sipex_mode_bits |= (uint)SIPEX_MODE(idx,0x02);
2618                                 *(uint *)_periph_base = sipex_mode_bits;
2619                                 /* printk ("sipex bits = 0x%08x\n", sipex_mode_bits); */
2620 #endif
2621                         }
2622
2623                         dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * TX_NUM_FIFO);
2624
2625                         /* Allocate space for FIFOs in the host memory.
2626                         */
2627                         /* mem_addr = m360_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE); */
2628                         /* mem_addr = kmalloc (TX_NUM_FIFO * TX_BUF_SIZE, GFP_BUFFER); */
2629                         mem_addr = &tx_buf_pool[i * TX_NUM_FIFO * TX_BUF_SIZE];
2630
2631                         /* Set the physical address of the host memory
2632                          * buffers in the buffer descriptors, and the
2633                          * virtual address for us to work with.
2634                          */
2635                         /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
2636                         bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2637                         info->tx_cur = info->tx_bd_base = (QUICC_BD *)bdp;
2638
2639                         /* initialize tx buffer descriptors */
2640                         for (j=0; j<(TX_NUM_FIFO-1); j++) {
2641                                 bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
2642                                 bdp->status = BD_SC_INTRPT;
2643                                 mem_addr += TX_BUF_SIZE;
2644                                 bdp++;
2645                         }
2646                         bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
2647                         bdp->status = (BD_SC_WRAP | BD_SC_INTRPT);
2648
2649                         if (info->state->smc_scc_num & NUM_IS_SCC) {
2650                                 scp = &pquicc->scc_regs[idx];
2651                                 sup = &pquicc->pram[info->state->port].scc.pscc.u;
2652                                 sup->rbase = dp_addr;
2653                                 sup->tbase = dp_addr;
2654
2655                                 /* Set up the uart parameters in the
2656                                  * parameter ram.
2657                                  */
2658                                 sup->rfcr = SMC_EB;
2659                                 sup->tfcr = SMC_EB;
2660
2661                                 /* Set this to 1 for now, so we get single
2662                                  * character interrupts.  Using idle charater
2663                                  * time requires some additional tuning.
2664                                  */
2665                                 sup->mrblr = 1;
2666                                 sup->max_idl = 0;
2667                                 sup->brkcr = 1;
2668                                 sup->parec = 0;
2669                                 sup->frmer = 0;
2670                                 sup->nosec = 0;
2671                                 sup->brkec = 0;
2672                                 sup->uaddr1 = 0;
2673                                 sup->uaddr2 = 0;
2674                                 sup->toseq = 0;
2675                                 {
2676                                         int i;
2677                                         for (i=0;i<8;i++)
2678                                                 sup->cc[i] = 0x8000;
2679                                 }
2680                                 sup->rccm = 0xc0ff;
2681
2682                                 /* Send the CPM an initialize command.
2683                                 */
2684                                 chan = scc_chan_map[idx];
2685
2686                                 /* execute the INIT RX & TX PARAMS command for this channel. */
2687                                 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2688                                 while (cp->cp_cr & CPM_CR_FLG);
2689
2690                                 /* Set UART mode, 8 bit, no parity, one stop.
2691                                  * Enable receive and transmit.
2692                                  */
2693                                 scp->scc_gsmr.w.high = 0;
2694                                 scp->scc_gsmr.w.low =
2695                                         (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
2696
2697                                 /* Disable all interrupts and clear all pending
2698                                  * events.
2699                                  */
2700                                 scp->scc_sccm = 0;
2701                                 scp->scc_scce = 0xffff;
2702                                 scp->scc_dsr = 0x7e7e;
2703                                 scp->scc_psmr = 0x3000;
2704
2705                                 /* If the port is the console, enable Rx and Tx.
2706                                 */
2707 #ifdef CONFIG_SERIAL_CONSOLE
2708                                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2709                                         scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
2710 #endif
2711                         }
2712                         else {
2713                                 /* Configure SMCs Tx/Rx instead of port B
2714                                  * parallel I/O.
2715                                  */
2716                                 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
2717                                 up->rbase = dp_addr;
2718
2719                                 iobits = 0xc0 << (idx * 4);
2720                                 cp->pip_pbpar |= iobits;
2721                                 cp->pip_pbdir &= ~iobits;
2722                                 cp->pip_pbodr &= ~iobits;
2723
2724
2725                                 /* Connect the baud rate generator to the
2726                                  * SMC based upon index in rs_table.  Also
2727                                  * make sure it is connected to NMSI.
2728                                  */
2729                                 cp->si_simode &= ~(0xffff << (idx * 16));
2730                                 cp->si_simode |= (i << ((idx * 16) + 12));
2731
2732                                 up->tbase = dp_addr;
2733
2734                                 /* Set up the uart parameters in the
2735                                  * parameter ram.
2736                                  */
2737                                 up->rfcr = SMC_EB;
2738                                 up->tfcr = SMC_EB;
2739
2740                                 /* Set this to 1 for now, so we get single
2741                                  * character interrupts.  Using idle charater
2742                                  * time requires some additional tuning.
2743                                  */
2744                                 up->mrblr = 1;
2745                                 up->max_idl = 0;
2746                                 up->brkcr = 1;
2747
2748                                 /* Send the CPM an initialize command.
2749                                 */
2750                                 chan = smc_chan_map[idx];
2751
2752                                 cp->cp_cr = mk_cr_cmd(chan,
2753                                                                           CPM_CR_INIT_TRX) | CPM_CR_FLG;
2754 #ifdef CONFIG_SERIAL_CONSOLE
2755                                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2756                                         printk("");
2757 #endif
2758                                 while (cp->cp_cr & CPM_CR_FLG);
2759
2760                                 /* Set UART mode, 8 bit, no parity, one stop.
2761                                  * Enable receive and transmit.
2762                                  */
2763                                 sp = &cp->smc_regs[idx];
2764                                 sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
2765
2766                                 /* Disable all interrupts and clear all pending
2767                                  * events.
2768                                  */
2769                                 sp->smc_smcm = 0;
2770                                 sp->smc_smce = 0xff;
2771
2772                                 /* If the port is the console, enable Rx and Tx.
2773                                 */
2774 #ifdef CONFIG_SERIAL_CONSOLE
2775                                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2776                                         sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
2777 #endif
2778                         }
2779
2780                         /* Install interrupt handler.
2781                         */
2782                         /* cpm_install_handler(IRQ_MACHSPEC | state->irq, rs_360_interrupt, info);  */
2783                         /*request_irq(IRQ_MACHSPEC | state->irq, rs_360_interrupt, */
2784                         request_irq(state->irq, rs_360_interrupt,
2785                                                 IRQ_FLG_LOCK, "ttyS", (void *)info);
2786
2787                         /* Set up the baud rate generator.
2788                         */
2789                         m360_cpm_setbrg(i, baud_table[baud_idx]);
2790
2791                 }
2792         }
2793
2794         return 0;
2795 }
2796 module_init(rs_360_init);
2797
2798 /* This must always be called before the rs_360_init() function, otherwise
2799  * it blows away the port control information.
2800  */
2801 //static int __init serial_console_setup( struct console *co, char *options)
2802 int serial_console_setup( struct console *co, char *options)
2803 {
2804         struct          serial_state    *ser;
2805         uint            mem_addr, dp_addr, bidx, idx, iobits;
2806         ushort          chan;
2807         QUICC_BD        *bdp;
2808         volatile        QUICC                   *cp;
2809         volatile        struct smc_regs *sp;
2810         volatile        struct scc_regs *scp;
2811         volatile        struct smc_uart_pram    *up;
2812         volatile        struct uart_pram                *sup;
2813
2814 /* mleslie TODO:
2815  * add something to the 68k bootloader to store a desired initial console baud rate */
2816
2817 /*      bd_t                                            *bd; */ /* a board info struct used by EPPC-bug */
2818 /*      bd = (bd_t *)__res; */
2819
2820         for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++)
2821          /* if (bd->bi_baudrate == baud_table[bidx]) */
2822                 if (CONSOLE_BAUDRATE == baud_table[bidx])
2823                         break;
2824
2825         /* co->cflag = CREAD|CLOCAL|bidx|CS8; */
2826         baud_idx = bidx;
2827
2828         ser = rs_table + CONFIG_SERIAL_CONSOLE_PORT;
2829
2830         cp = pquicc;    /* Get pointer to Communication Processor */
2831
2832         idx = PORT_NUM(ser->smc_scc_num);
2833         if (ser->smc_scc_num & NUM_IS_SCC) {
2834
2835                 /* TODO: need to set up SCC pin assignment etc. here */
2836
2837         }
2838         else {
2839                 iobits = 0xc0 << (idx * 4);
2840                 cp->pip_pbpar |= iobits;
2841                 cp->pip_pbdir &= ~iobits;
2842                 cp->pip_pbodr &= ~iobits;
2843
2844                 /* Connect the baud rate generator to the
2845                  * SMC based upon index in rs_table.  Also
2846                  * make sure it is connected to NMSI.
2847                  */
2848                 cp->si_simode &= ~(0xffff << (idx * 16));
2849                 cp->si_simode |= (idx << ((idx * 16) + 12));
2850         }
2851
2852         /* When we get here, the CPM has been reset, so we need
2853          * to configure the port.
2854          * We need to allocate a transmit and receive buffer descriptor
2855          * from dual port ram, and a character buffer area from host mem.
2856          */
2857
2858         /* Allocate space for two buffer descriptors in the DP ram.
2859         */
2860         dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * CONSOLE_NUM_FIFO);
2861
2862         /* Allocate space for two 2 byte FIFOs in the host memory.
2863          */
2864         /* mem_addr = m360_cpm_hostalloc(8); */
2865         mem_addr = (uint)console_fifos;
2866
2867
2868         /* Set the physical address of the host memory buffers in
2869          * the buffer descriptors.
2870          */
2871         /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
2872         bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2873         bdp->buf = (char *)mem_addr;
2874         (bdp+1)->buf = (char *)(mem_addr+4);
2875
2876         /* For the receive, set empty and wrap.
2877          * For transmit, set wrap.
2878          */
2879         bdp->status = BD_SC_EMPTY | BD_SC_WRAP;
2880         (bdp+1)->status = BD_SC_WRAP;
2881
2882         /* Set up the uart parameters in the parameter ram.
2883          */
2884         if (ser->smc_scc_num & NUM_IS_SCC) {
2885                 scp = &cp->scc_regs[idx];
2886                 /* sup = (scc_uart_t *)&cp->cp_dparam[ser->port]; */
2887                 sup = &pquicc->pram[ser->port].scc.pscc.u;
2888
2889                 sup->rbase = dp_addr;
2890                 sup->tbase = dp_addr + sizeof(QUICC_BD);
2891
2892                 /* Set up the uart parameters in the
2893                  * parameter ram.
2894                  */
2895                 sup->rfcr = SMC_EB;
2896                 sup->tfcr = SMC_EB;
2897
2898                 /* Set this to 1 for now, so we get single
2899                  * character interrupts.  Using idle charater
2900                  * time requires some additional tuning.
2901                  */
2902                 sup->mrblr = 1;
2903                 sup->max_idl = 0;
2904                 sup->brkcr = 1;
2905                 sup->parec = 0;
2906                 sup->frmer = 0;
2907                 sup->nosec = 0;
2908                 sup->brkec = 0;
2909                 sup->uaddr1 = 0;
2910                 sup->uaddr2 = 0;
2911                 sup->toseq = 0;
2912                 {
2913                         int i;
2914                         for (i=0;i<8;i++)
2915                                 sup->cc[i] = 0x8000;
2916                 }
2917                 sup->rccm = 0xc0ff;
2918
2919                 /* Send the CPM an initialize command.
2920                 */
2921                 chan = scc_chan_map[idx];
2922
2923                 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2924                 while (cp->cp_cr & CPM_CR_FLG);
2925
2926                 /* Set UART mode, 8 bit, no parity, one stop.
2927                  * Enable receive and transmit.
2928                  */
2929                 scp->scc_gsmr.w.high = 0;
2930                 scp->scc_gsmr.w.low =
2931                         (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
2932
2933                 /* Disable all interrupts and clear all pending
2934                  * events.
2935                  */
2936                 scp->scc_sccm = 0;
2937                 scp->scc_scce = 0xffff;
2938                 scp->scc_dsr = 0x7e7e;
2939                 scp->scc_psmr = 0x3000;
2940
2941                 scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
2942
2943         }
2944         else {
2945                 /* up = (smc_uart_t *)&cp->cp_dparam[ser->port]; */
2946                 up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
2947
2948                 up->rbase = dp_addr;    /* Base of receive buffer desc. */
2949                 up->tbase = dp_addr+sizeof(QUICC_BD);   /* Base of xmt buffer desc. */
2950                 up->rfcr = SMC_EB;
2951                 up->tfcr = SMC_EB;
2952
2953                 /* Set this to 1 for now, so we get single character interrupts.
2954                 */
2955                 up->mrblr = 1;          /* receive buffer length */
2956                 up->max_idl = 0;                /* wait forever for next char */
2957
2958                 /* Send the CPM an initialize command.
2959                 */
2960                 chan = smc_chan_map[idx];
2961                 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2962                 while (cp->cp_cr & CPM_CR_FLG);
2963
2964                 /* Set UART mode, 8 bit, no parity, one stop.
2965                  * Enable receive and transmit.
2966                  */
2967                 sp = &cp->smc_regs[idx];
2968                 sp->smc_smcmr = smcr_mk_clen(9) |  SMCMR_SM_UART;
2969
2970                 /* And finally, enable Rx and Tx.
2971                 */
2972                 sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
2973         }
2974
2975         /* Set up the baud rate generator.
2976         */
2977         /* m360_cpm_setbrg((ser - rs_table), bd->bi_baudrate); */
2978         m360_cpm_setbrg((ser - rs_table), CONSOLE_BAUDRATE);
2979
2980         return 0;
2981 }
2982
2983 /*
2984  * Local variables:
2985  *  c-indent-level: 4
2986  *  c-basic-offset: 4
2987  *  tab-width: 4
2988  * End:
2989  */