drivers/serial/68328serial.c

   1 /* 68328serial.c: Serial port driver for 68328 microcontroller
   2  *
   3  * Copyright (C) 1995       David S. Miller    <davem@caip.rutgers.edu>
   4  * Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
   5  * Copyright (C) 1998, 1999 D. Jeff Dionne     <jeff@uclinux.org>
   6  * Copyright (C) 1999       Vladimir Gurevich  <vgurevic@cisco.com>
   7  * Copyright (C) 2002-2003  David McCullough   <davidm@snapgear.com>
   8  * Copyright (C) 2002       Greg Ungerer       <gerg@snapgear.com>
   9  *
  10  * VZ Support/Fixes             Evan Stawnyczy <e@lineo.ca>
  11  * Multiple UART support        Daniel Potts <danielp@cse.unsw.edu.au>
  12  * Power management support     Daniel Potts <danielp@cse.unsw.edu.au>
  13  * VZ Second Serial Port enable Phil Wilshire
  14  * 2.4/2.5 port                 David McCullough
  15  */
  16
  17 #include <asm/dbg.h>
  18 #include <linux/module.h>
  19 #include <linux/errno.h>
  20 #include <linux/signal.h>
  21 #include <linux/sched.h>
  22 #include <linux/timer.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/tty.h>
  25 #include <linux/tty_flip.h>
  26 #include <linux/config.h>
  27 #include <linux/major.h>
  28 #include <linux/string.h>
  29 #include <linux/fcntl.h>
  30 #include <linux/mm.h>
  31 #include <linux/kernel.h>
  32 #include <linux/console.h>
  33 #include <linux/reboot.h>
  34 #include <linux/keyboard.h>
  35 #include <linux/init.h>
  36 #include <linux/pm.h>
  37 #include <linux/pm_legacy.h>
  38 #include <linux/bitops.h>
  39 #include <linux/delay.h>
  40
  41 #include <asm/io.h>
  42 #include <asm/irq.h>
  43 #include <asm/system.h>
  44 #include <asm/delay.h>
  45 #include <asm/uaccess.h>
  46
  47 /* (es) */
  48 /* note: perhaps we can murge these files, so that you can just
  49  *       define 1 of them, and they can sort that out for themselves
  50  */
  51 #if defined(CONFIG_M68EZ328)
  52 #include <asm/MC68EZ328.h>
  53 #else
  54 #if defined(CONFIG_M68VZ328)
  55 #include <asm/MC68VZ328.h>
  56 #else
  57 #include <asm/MC68328.h>
  58 #endif /* CONFIG_M68VZ328 */
  59 #endif /* CONFIG_M68EZ328 */
  60
  61 #include "68328serial.h"
  62
  63 /* Turn off usage of real serial interrupt code, to "support" Copilot */
  64 #ifdef CONFIG_XCOPILOT_BUGS
  65 #undef USE_INTS
  66 #else
  67 #define USE_INTS
  68 #endif
  69
  70 static struct m68k_serial m68k_soft[NR_PORTS];
  71 struct m68k_serial *IRQ_ports[NR_IRQS];
  72
  73 static unsigned int uart_irqs[NR_PORTS] = UART_IRQ_DEFNS;
  74
  75 /* multiple ports are contiguous in memory */
  76 m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR;
  77
  78 struct tty_struct m68k_ttys;
  79 struct m68k_serial *m68k_consinfo = 0;
  80
  81 #define M68K_CLOCK (16667000) /* FIXME: 16MHz is likely wrong */
  82
  83 #ifdef CONFIG_CONSOLE
  84 extern wait_queue_head_t keypress_wait;
  85 #endif
  86
  87 struct tty_driver *serial_driver;
  88
  89 /* serial subtype definitions */
  90 #define SERIAL_TYPE_NORMAL      1
  91
  92 /* number of characters left in xmit buffer before we ask for more */
  93 #define WAKEUP_CHARS 256
  94
  95 /* Debugging... DEBUG_INTR is bad to use when one of the zs
  96  * lines is your console ;(
  97  */
  98 #undef SERIAL_DEBUG_INTR
  99 #undef SERIAL_DEBUG_OPEN
 100 #undef SERIAL_DEBUG_FLOW
 101
 102 #define RS_ISR_PASS_LIMIT 256
 103
 104 static void change_speed(struct m68k_serial *info);
 105
 106 /*
 107  *      Setup for console. Argument comes from the boot command line.
 108  */
 109
 110 #if defined(CONFIG_M68EZ328ADS) || defined(CONFIG_ALMA_ANS) || defined(CONFIG_DRAGONIXVZ)
 111 #define CONSOLE_BAUD_RATE       115200
 112 #define DEFAULT_CBAUD           B115200
 113 #else
 114         /* (es) */
 115         /* note: this is messy, but it works, again, perhaps defined somewhere else?*/
 116         #ifdef CONFIG_M68VZ328
 117         #define CONSOLE_BAUD_RATE       19200
 118         #define DEFAULT_CBAUD           B19200
 119         #endif
 120         /* (/es) */
 121 #endif
 122
 123 #ifndef CONSOLE_BAUD_RATE
 124 #define CONSOLE_BAUD_RATE       9600
 125 #define DEFAULT_CBAUD           B9600
 126 #endif
 127
 128
 129 static int m68328_console_initted = 0;
 130 static int m68328_console_baud    = CONSOLE_BAUD_RATE;
 131 static int m68328_console_cbaud   = DEFAULT_CBAUD;
 132
 133
 134 static inline int serial_paranoia_check(struct m68k_serial *info,
 135                                         char *name, const char *routine)
 136 {
 137 #ifdef SERIAL_PARANOIA_CHECK
 138         static const char *badmagic =
 139                 "Warning: bad magic number for serial struct %s in %s\n";
 140         static const char *badinfo =
 141                 "Warning: null m68k_serial for %s in %s\n";
 142
 143         if (!info) {
 144                 printk(badinfo, name, routine);
 145                 return 1;
 146         }
 147         if (info->magic != SERIAL_MAGIC) {
 148                 printk(badmagic, name, routine);
 149                 return 1;
 150         }
 151 #endif
 152         return 0;
 153 }
 154
 155 /*
 156  * This is used to figure out the divisor speeds and the timeouts
 157  */
 158 static int baud_table[] = {
 159         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
 160         9600, 19200, 38400, 57600, 115200, 0 };
 161
 162 #define BAUD_TABLE_SIZE (sizeof(baud_table)/sizeof(baud_table[0]))
 163
 164 /* Sets or clears DTR/RTS on the requested line */
 165 static inline void m68k_rtsdtr(struct m68k_serial *ss, int set)
 166 {
 167         if (set) {
 168                 /* set the RTS/CTS line */
 169         } else {
 170                 /* clear it */
 171         }
 172         return;
 173 }
 174
 175 /* Utility routines */
 176 static inline int get_baud(struct m68k_serial *ss)
 177 {
 178         unsigned long result = 115200;
 179         unsigned short int baud = uart_addr[ss->line].ubaud;
 180         if (GET_FIELD(baud, UBAUD_PRESCALER) == 0x38) result = 38400;
 181         result >>= GET_FIELD(baud, UBAUD_DIVIDE);
 182
 183         return result;
 184 }
 185
 186 /*
 187  * ------------------------------------------------------------
 188  * rs_stop() and rs_start()
 189  *
 190  * This routines are called before setting or resetting tty->stopped.
 191  * They enable or disable transmitter interrupts, as necessary.
 192  * ------------------------------------------------------------
 193  */
 194 static void rs_stop(struct tty_struct *tty)
 195 {
 196         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 197         m68328_uart *uart = &uart_addr[info->line];
 198         unsigned long flags;
 199
 200         if (serial_paranoia_check(info, tty->name, "rs_stop"))
 201                 return;
 202
 203         local_irq_save(flags);
 204         uart->ustcnt &= ~USTCNT_TXEN;
 205         local_irq_restore(flags);
 206 }
 207
 208 static void rs_put_char(char ch)
 209 {
 210         int flags, loops = 0;
 211
 212         local_irq_save(flags);
 213
 214         while (!(UTX & UTX_TX_AVAIL) && (loops < 1000)) {
 215                 loops++;
 216                 udelay(5);
 217         }
 218
 219         UTX_TXDATA = ch;
 220         udelay(5);
 221         local_irq_restore(flags);
 222 }
 223
 224 static void rs_start(struct tty_struct *tty)
 225 {
 226         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 227         m68328_uart *uart = &uart_addr[info->line];
 228         unsigned long flags;
 229
 230         if (serial_paranoia_check(info, tty->name, "rs_start"))
 231                 return;
 232
 233         local_irq_save(flags);
 234         if (info->xmit_cnt && info->xmit_buf && !(uart->ustcnt & USTCNT_TXEN)) {
 235 #ifdef USE_INTS
 236                 uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK;
 237 #else
 238                 uart->ustcnt |= USTCNT_TXEN;
 239 #endif
 240         }
 241         local_irq_restore(flags);
 242 }
 243
 244 /* Drop into either the boot monitor or kadb upon receiving a break
 245  * from keyboard/console input.
 246  */
 247 static void batten_down_hatches(void)
 248 {
 249         /* Drop into the debugger */
 250 }
 251
 252 static void status_handle(struct m68k_serial *info, unsigned short status)
 253 {
 254 #if 0
 255         if(status & DCD) {
 256                 if((info->tty->termios->c_cflag & CRTSCTS) &&
 257                    ((info->curregs[3] & AUTO_ENAB)==0)) {
 258                         info->curregs[3] |= AUTO_ENAB;
 259                         info->pendregs[3] |= AUTO_ENAB;
 260                         write_zsreg(info->m68k_channel, 3, info->curregs[3]);
 261                 }
 262         } else {
 263                 if((info->curregs[3] & AUTO_ENAB)) {
 264                         info->curregs[3] &= ~AUTO_ENAB;
 265                         info->pendregs[3] &= ~AUTO_ENAB;
 266                         write_zsreg(info->m68k_channel, 3, info->curregs[3]);
 267                 }
 268         }
 269 #endif
 270         /* If this is console input and this is a
 271          * 'break asserted' status change interrupt
 272          * see if we can drop into the debugger
 273          */
 274         if((status & URX_BREAK) && info->break_abort)
 275                 batten_down_hatches();
 276         return;
 277 }
 278
 279 static void receive_chars(struct m68k_serial *info, struct pt_regs *regs,
 280                           unsigned short rx)
 281 {
 282         struct tty_struct *tty = info->tty;
 283         m68328_uart *uart = &uart_addr[info->line];
 284         unsigned char ch, flag;
 285
 286         /*
 287          * This do { } while() loop will get ALL chars out of Rx FIFO
 288          */
 289 #ifndef CONFIG_XCOPILOT_BUGS
 290         do {
 291 #endif
 292                 ch = GET_FIELD(rx, URX_RXDATA);
 293
 294                 if(info->is_cons) {
 295                         if(URX_BREAK & rx) { /* whee, break received */
 296                                 status_handle(info, rx);
 297                                 return;
 298 #ifdef CONFIG_MAGIC_SYSRQ
 299                         } else if (ch == 0x10) { /* ^P */
 300                                 show_state();
 301                                 show_free_areas();
 302                                 show_buffers();
 303 /*                              show_net_buffers(); */
 304                                 return;
 305                         } else if (ch == 0x12) { /* ^R */
 306                                 emergency_restart();
 307                                 return;
 308 #endif /* CONFIG_MAGIC_SYSRQ */
 309                         }
 310                         /* It is a 'keyboard interrupt' ;-) */
 311 #ifdef CONFIG_CONSOLE
 312                         wake_up(&keypress_wait);
 313 #endif
 314                 }
 315
 316                 if(!tty)
 317                         goto clear_and_exit;
 318
 319                 flag = TTY_NORMAL;
 320
 321                 if(rx & URX_PARITY_ERROR) {
 322                         flag = TTY_PARITY;
 323                         status_handle(info, rx);
 324                 } else if(rx & URX_OVRUN) {
 325                         flag = TTY_OVERRUN;
 326                         status_handle(info, rx);
 327                 } else if(rx & URX_FRAME_ERROR) {
 328                         flag = TTY_FRAME;
 329                         status_handle(info, rx);
 330                 }
 331                 tty_insert_flip_char(tty, ch, flag);
 332 #ifndef CONFIG_XCOPILOT_BUGS
 333         } while((rx = uart->urx.w) & URX_DATA_READY);
 334 #endif
 335
 336         tty_schedule_flip(tty);
 337
 338 clear_and_exit:
 339         return;
 340 }
 341
 342 static void transmit_chars(struct m68k_serial *info)
 343 {
 344         m68328_uart *uart = &uart_addr[info->line];
 345
 346         if (info->x_char) {
 347                 /* Send next char */
 348                 uart->utx.b.txdata = info->x_char;
 349                 info->x_char = 0;
 350                 goto clear_and_return;
 351         }
 352
 353         if((info->xmit_cnt <= 0) || info->tty->stopped) {
 354                 /* That's peculiar... TX ints off */
 355                 uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
 356                 goto clear_and_return;
 357         }
 358
 359         /* Send char */
 360         uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++];
 361         info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
 362         info->xmit_cnt--;
 363
 364         if (info->xmit_cnt < WAKEUP_CHARS)
 365                 schedule_work(&info->tqueue);
 366
 367         if(info->xmit_cnt <= 0) {
 368                 /* All done for now... TX ints off */
 369                 uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
 370                 goto clear_and_return;
 371         }
 372
 373 clear_and_return:
 374         /* Clear interrupt (should be auto)*/
 375         return;
 376 }
 377
 378 /*
 379  * This is the serial driver's generic interrupt routine
 380  */
 381 irqreturn_t rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 382 {
 383         struct m68k_serial * info;
 384         m68328_uart *uart;
 385         unsigned short rx;
 386         unsigned short tx;
 387
 388         info = IRQ_ports[irq];
 389         if(!info)
 390             return IRQ_NONE;
 391
 392         uart = &uart_addr[info->line];
 393         rx = uart->urx.w;
 394
 395 #ifdef USE_INTS
 396         tx = uart->utx.w;
 397
 398         if (rx & URX_DATA_READY) receive_chars(info, regs, rx);
 399         if (tx & UTX_TX_AVAIL)   transmit_chars(info);
 400 #else
 401         receive_chars(info, regs, rx);
 402 #endif
 403         return IRQ_HANDLED;
 404 }
 405
 406 static void do_softint(void *private)
 407 {
 408         struct m68k_serial      *info = (struct m68k_serial *) private;
 409         struct tty_struct       *tty;
 410
 411         tty = info->tty;
 412         if (!tty)
 413                 return;
 414 #if 0
 415         if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
 416                 tty_wakeup(tty);
 417         }
 418 #endif
 419 }
 420
 421 /*
 422  * This routine is called from the scheduler tqueue when the interrupt
 423  * routine has signalled that a hangup has occurred.  The path of
 424  * hangup processing is:
 425  *
 426  *      serial interrupt routine -> (scheduler tqueue) ->
 427  *      do_serial_hangup() -> tty->hangup() -> rs_hangup()
 428  *
 429  */
 430 static void do_serial_hangup(void *private)
 431 {
 432         struct m68k_serial      *info = (struct m68k_serial *) private;
 433         struct tty_struct       *tty;
 434
 435         tty = info->tty;
 436         if (!tty)
 437                 return;
 438
 439         tty_hangup(tty);
 440 }
 441
 442
 443 static int startup(struct m68k_serial * info)
 444 {
 445         m68328_uart *uart = &uart_addr[info->line];
 446         unsigned long flags;
 447
 448         if (info->flags & S_INITIALIZED)
 449                 return 0;
 450
 451         if (!info->xmit_buf) {
 452                 info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL);
 453                 if (!info->xmit_buf)
 454                         return -ENOMEM;
 455         }
 456
 457         local_irq_save(flags);
 458
 459         /*
 460          * Clear the FIFO buffers and disable them
 461          * (they will be reenabled in change_speed())
 462          */
 463
 464         uart->ustcnt = USTCNT_UEN;
 465         info->xmit_fifo_size = 1;
 466         uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_TXEN;
 467         (void)uart->urx.w;
 468
 469         /*
 470          * Finally, enable sequencing and interrupts
 471          */
 472 #ifdef USE_INTS
 473         uart->ustcnt = USTCNT_UEN | USTCNT_RXEN |
 474                  USTCNT_RX_INTR_MASK | USTCNT_TX_INTR_MASK;
 475 #else
 476         uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_RX_INTR_MASK;
 477 #endif
 478
 479         if (info->tty)
 480                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 481         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 482
 483         /*
 484          * and set the speed of the serial port
 485          */
 486
 487         change_speed(info);
 488
 489         info->flags |= S_INITIALIZED;
 490         local_irq_restore(flags);
 491         return 0;
 492 }
 493
 494 /*
 495  * This routine will shutdown a serial port; interrupts are disabled, and
 496  * DTR is dropped if the hangup on close termio flag is on.
 497  */
 498 static void shutdown(struct m68k_serial * info)
 499 {
 500         m68328_uart *uart = &uart_addr[info->line];
 501         unsigned long   flags;
 502
 503         uart->ustcnt = 0; /* All off! */
 504         if (!(info->flags & S_INITIALIZED))
 505                 return;
 506
 507         local_irq_save(flags);
 508
 509         if (info->xmit_buf) {
 510                 free_page((unsigned long) info->xmit_buf);
 511                 info->xmit_buf = 0;
 512         }
 513
 514         if (info->tty)
 515                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 516
 517         info->flags &= ~S_INITIALIZED;
 518         local_irq_restore(flags);
 519 }
 520
 521 struct {
 522         int divisor, prescale;
 523 }
 524 #ifndef CONFIG_M68VZ328
 525  hw_baud_table[18] = {
 526         {0,0}, /* 0 */
 527         {0,0}, /* 50 */
 528         {0,0}, /* 75 */
 529         {0,0}, /* 110 */
 530         {0,0}, /* 134 */
 531         {0,0}, /* 150 */
 532         {0,0}, /* 200 */
 533         {7,0x26}, /* 300 */
 534         {6,0x26}, /* 600 */
 535         {5,0x26}, /* 1200 */
 536         {0,0}, /* 1800 */
 537         {4,0x26}, /* 2400 */
 538         {3,0x26}, /* 4800 */
 539         {2,0x26}, /* 9600 */
 540         {1,0x26}, /* 19200 */
 541         {0,0x26}, /* 38400 */
 542         {1,0x38}, /* 57600 */
 543         {0,0x38}, /* 115200 */
 544 };
 545 #else
 546  hw_baud_table[18] = {
 547                  {0,0}, /* 0 */
 548                  {0,0}, /* 50 */
 549                  {0,0}, /* 75 */
 550                  {0,0}, /* 110 */
 551                  {0,0}, /* 134 */
 552                  {0,0}, /* 150 */
 553                  {0,0}, /* 200 */
 554                  {0,0}, /* 300 */
 555                  {7,0x26}, /* 600 */
 556                  {6,0x26}, /* 1200 */
 557                  {0,0}, /* 1800 */
 558                  {5,0x26}, /* 2400 */
 559                  {4,0x26}, /* 4800 */
 560                  {3,0x26}, /* 9600 */
 561                  {2,0x26}, /* 19200 */
 562                  {1,0x26}, /* 38400 */
 563                  {0,0x26}, /* 57600 */
 564                  {1,0x38}, /* 115200 */
 565 };
 566 #endif
 567 /* rate = 1036800 / ((65 - prescale) * (1<<divider)) */
 568
 569 /*
 570  * This routine is called to set the UART divisor registers to match
 571  * the specified baud rate for a serial port.
 572  */
 573 static void change_speed(struct m68k_serial *info)
 574 {
 575         m68328_uart *uart = &uart_addr[info->line];
 576         unsigned short port;
 577         unsigned short ustcnt;
 578         unsigned cflag;
 579         int     i;
 580
 581         if (!info->tty || !info->tty->termios)
 582                 return;
 583         cflag = info->tty->termios->c_cflag;
 584         if (!(port = info->port))
 585                 return;
 586
 587         ustcnt = uart->ustcnt;
 588         uart->ustcnt = ustcnt & ~USTCNT_TXEN;
 589
 590         i = cflag & CBAUD;
 591         if (i & CBAUDEX) {
 592                 i = (i & ~CBAUDEX) + B38400;
 593         }
 594
 595         info->baud = baud_table[i];
 596         uart->ubaud = PUT_FIELD(UBAUD_DIVIDE,    hw_baud_table[i].divisor) |
 597                 PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale);
 598
 599         ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7);
 600
 601         if ((cflag & CSIZE) == CS8)
 602                 ustcnt |= USTCNT_8_7;
 603
 604         if (cflag & CSTOPB)
 605                 ustcnt |= USTCNT_STOP;
 606
 607         if (cflag & PARENB)
 608                 ustcnt |= USTCNT_PARITYEN;
 609         if (cflag & PARODD)
 610                 ustcnt |= USTCNT_ODD_EVEN;
 611
 612 #ifdef CONFIG_SERIAL_68328_RTS_CTS
 613         if (cflag & CRTSCTS) {
 614                 uart->utx.w &= ~ UTX_NOCTS;
 615         } else {
 616                 uart->utx.w |= UTX_NOCTS;
 617         }
 618 #endif
 619
 620         ustcnt |= USTCNT_TXEN;
 621
 622         uart->ustcnt = ustcnt;
 623         return;
 624 }
 625
 626 /*
 627  * Fair output driver allows a process to speak.
 628  */
 629 static void rs_fair_output(void)
 630 {
 631         int left;               /* Output no more than that */
 632         unsigned long flags;
 633         struct m68k_serial *info = &m68k_soft[0];
 634         char c;
 635
 636         if (info == 0) return;
 637         if (info->xmit_buf == 0) return;
 638
 639         local_irq_save(flags);
 640         left = info->xmit_cnt;
 641         while (left != 0) {
 642                 c = info->xmit_buf[info->xmit_tail];
 643                 info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1);
 644                 info->xmit_cnt--;
 645                 local_irq_restore(flags);
 646
 647                 rs_put_char(c);
 648
 649                 local_irq_save(flags);
 650                 left = min(info->xmit_cnt, left-1);
 651         }
 652
 653         /* Last character is being transmitted now (hopefully). */
 654         udelay(5);
 655
 656         local_irq_restore(flags);
 657         return;
 658 }
 659
 660 /*
 661  * m68k_console_print is registered for printk.
 662  */
 663 void console_print_68328(const char *p)
 664 {
 665         char c;
 666
 667         while((c=*(p++)) != 0) {
 668                 if(c == '\n')
 669                         rs_put_char('\r');
 670                 rs_put_char(c);
 671         }
 672
 673         /* Comment this if you want to have a strict interrupt-driven output */
 674         rs_fair_output();
 675
 676         return;
 677 }
 678
 679 static void rs_set_ldisc(struct tty_struct *tty)
 680 {
 681         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 682
 683         if (serial_paranoia_check(info, tty->name, "rs_set_ldisc"))
 684                 return;
 685
 686         info->is_cons = (tty->termios->c_line == N_TTY);
 687
 688         printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off");
 689 }
 690
 691 static void rs_flush_chars(struct tty_struct *tty)
 692 {
 693         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 694         m68328_uart *uart = &uart_addr[info->line];
 695         unsigned long flags;
 696
 697         if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
 698                 return;
 699 #ifndef USE_INTS
 700         for(;;) {
 701 #endif
 702
 703         /* Enable transmitter */
 704         local_irq_save(flags);
 705
 706         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
 707                         !info->xmit_buf) {
 708                 local_irq_restore(flags);
 709                 return;
 710         }
 711
 712 #ifdef USE_INTS
 713         uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK;
 714 #else
 715         uart->ustcnt |= USTCNT_TXEN;
 716 #endif
 717
 718 #ifdef USE_INTS
 719         if (uart->utx.w & UTX_TX_AVAIL) {
 720 #else
 721         if (1) {
 722 #endif
 723                 /* Send char */
 724                 uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++];
 725                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
 726                 info->xmit_cnt--;
 727         }
 728
 729 #ifndef USE_INTS
 730         while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5);
 731         }
 732 #endif
 733         local_irq_restore(flags);
 734 }
 735
 736 extern void console_printn(const char * b, int count);
 737
 738 static int rs_write(struct tty_struct * tty,
 739                     const unsigned char *buf, int count)
 740 {
 741         int     c, total = 0;
 742         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 743         m68328_uart *uart = &uart_addr[info->line];
 744         unsigned long flags;
 745
 746         if (serial_paranoia_check(info, tty->name, "rs_write"))
 747                 return 0;
 748
 749         if (!tty || !info->xmit_buf)
 750                 return 0;
 751
 752         local_save_flags(flags);
 753         while (1) {
 754                 local_irq_disable();
 755                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
 756                                    SERIAL_XMIT_SIZE - info->xmit_head));
 757                 local_irq_restore(flags);
 758
 759                 if (c <= 0)
 760                         break;
 761
 762                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
 763
 764                 local_irq_disable();
 765                 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
 766                 info->xmit_cnt += c;
 767                 local_irq_restore(flags);
 768                 buf += c;
 769                 count -= c;
 770                 total += c;
 771         }
 772
 773         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
 774                 /* Enable transmitter */
 775                 local_irq_disable();
 776 #ifndef USE_INTS
 777                 while(info->xmit_cnt) {
 778 #endif
 779
 780                 uart->ustcnt |= USTCNT_TXEN;
 781 #ifdef USE_INTS
 782                 uart->ustcnt |= USTCNT_TX_INTR_MASK;
 783 #else
 784                 while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5);
 785 #endif
 786                 if (uart->utx.w & UTX_TX_AVAIL) {
 787                         uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++];
 788                         info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
 789                         info->xmit_cnt--;
 790                 }
 791
 792 #ifndef USE_INTS
 793                 }
 794 #endif
 795                 local_irq_restore(flags);
 796         }
 797
 798         return total;
 799 }
 800
 801 static int rs_write_room(struct tty_struct *tty)
 802 {
 803         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 804         int     ret;
 805
 806         if (serial_paranoia_check(info, tty->name, "rs_write_room"))
 807                 return 0;
 808         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
 809         if (ret < 0)
 810                 ret = 0;
 811         return ret;
 812 }
 813
 814 static int rs_chars_in_buffer(struct tty_struct *tty)
 815 {
 816         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 817
 818         if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
 819                 return 0;
 820         return info->xmit_cnt;
 821 }
 822
 823 static void rs_flush_buffer(struct tty_struct *tty)
 824 {
 825         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 826         unsigned long flags;
 827
 828         if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
 829                 return;
 830         local_irq_save(flags);
 831         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 832         local_irq_restore(flags);
 833         tty_wakeup(tty);
 834 }
 835
 836 /*
 837  * ------------------------------------------------------------
 838  * rs_throttle()
 839  *
 840  * This routine is called by the upper-layer tty layer to signal that
 841  * incoming characters should be throttled.
 842  * ------------------------------------------------------------
 843  */
 844 static void rs_throttle(struct tty_struct * tty)
 845 {
 846         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 847
 848         if (serial_paranoia_check(info, tty->name, "rs_throttle"))
 849                 return;
 850
 851         if (I_IXOFF(tty))
 852                 info->x_char = STOP_CHAR(tty);
 853
 854         /* Turn off RTS line (do this atomic) */
 855 }
 856
 857 static void rs_unthrottle(struct tty_struct * tty)
 858 {
 859         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
 860
 861         if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
 862                 return;
 863
 864         if (I_IXOFF(tty)) {
 865                 if (info->x_char)
 866                         info->x_char = 0;
 867                 else
 868                         info->x_char = START_CHAR(tty);
 869         }
 870
 871         /* Assert RTS line (do this atomic) */
 872 }
 873
 874 /*
 875  * ------------------------------------------------------------
 876  * rs_ioctl() and friends
 877  * ------------------------------------------------------------
 878  */
 879
 880 static int get_serial_info(struct m68k_serial * info,
 881                            struct serial_struct * retinfo)
 882 {
 883         struct serial_struct tmp;
 884
 885         if (!retinfo)
 886                 return -EFAULT;
 887         memset(&tmp, 0, sizeof(tmp));
 888         tmp.type = info->type;
 889         tmp.line = info->line;
 890         tmp.port = info->port;
 891         tmp.irq = info->irq;
 892         tmp.flags = info->flags;
 893         tmp.baud_base = info->baud_base;
 894         tmp.close_delay = info->close_delay;
 895         tmp.closing_wait = info->closing_wait;
 896         tmp.custom_divisor = info->custom_divisor;
 897         copy_to_user(retinfo,&tmp,sizeof(*retinfo));
 898         return 0;
 899 }
 900
 901 static int set_serial_info(struct m68k_serial * info,
 902                            struct serial_struct * new_info)
 903 {
 904         struct serial_struct new_serial;
 905         struct m68k_serial old_info;
 906         int                     retval = 0;
 907
 908         if (!new_info)
 909                 return -EFAULT;
 910         copy_from_user(&new_serial,new_info,sizeof(new_serial));
 911         old_info = *info;
 912
 913         if (!capable(CAP_SYS_ADMIN)) {
 914                 if ((new_serial.baud_base != info->baud_base) ||
 915                     (new_serial.type != info->type) ||
 916                     (new_serial.close_delay != info->close_delay) ||
 917                     ((new_serial.flags & ~S_USR_MASK) !=
 918                      (info->flags & ~S_USR_MASK)))
 919                         return -EPERM;
 920                 info->flags = ((info->flags & ~S_USR_MASK) |
 921                                (new_serial.flags & S_USR_MASK));
 922                 info->custom_divisor = new_serial.custom_divisor;
 923                 goto check_and_exit;
 924         }
 925
 926         if (info->count > 1)
 927                 return -EBUSY;
 928
 929         /*
 930          * OK, past this point, all the error checking has been done.
 931          * At this point, we start making changes.....
 932          */
 933
 934         info->baud_base = new_serial.baud_base;
 935         info->flags = ((info->flags & ~S_FLAGS) |
 936                         (new_serial.flags & S_FLAGS));
 937         info->type = new_serial.type;
 938         info->close_delay = new_serial.close_delay;
 939         info->closing_wait = new_serial.closing_wait;
 940
 941 check_and_exit:
 942         retval = startup(info);
 943         return retval;
 944 }
 945
 946 /*
 947  * get_lsr_info - get line status register info
 948  *
 949  * Purpose: Let user call ioctl() to get info when the UART physically
 950  *          is emptied.  On bus types like RS485, the transmitter must
 951  *          release the bus after transmitting. This must be done when
 952  *          the transmit shift register is empty, not be done when the
 953  *          transmit holding register is empty.  This functionality
 954  *          allows an RS485 driver to be written in user space.
 955  */
 956 static int get_lsr_info(struct m68k_serial * info, unsigned int *value)
 957 {
 958 #ifdef CONFIG_SERIAL_68328_RTS_CTS
 959         m68328_uart *uart = &uart_addr[info->line];
 960 #endif
 961         unsigned char status;
 962         unsigned long flags;
 963
 964         local_irq_save(flags);
 965 #ifdef CONFIG_SERIAL_68328_RTS_CTS
 966         status = (uart->utx.w & UTX_CTS_STAT) ? 1 : 0;
 967 #else
 968         status = 0;
 969 #endif
 970         local_irq_restore(flags);
 971         put_user(status,value);
 972         return 0;
 973 }
 974
 975 /*
 976  * This routine sends a break character out the serial port.
 977  */
 978 static void send_break(struct m68k_serial * info, unsigned int duration)
 979 {
 980         m68328_uart *uart = &uart_addr[info->line];
 981         unsigned long flags;
 982         if (!info->port)
 983                 return;
 984         local_irq_save(flags);
 985 #ifdef USE_INTS
 986         uart->utx.w |= UTX_SEND_BREAK;
 987         msleep_interruptible(duration);
 988         uart->utx.w &= ~UTX_SEND_BREAK;
 989 #endif
 990         local_irq_restore(flags);
 991 }
 992
 993 static int rs_ioctl(struct tty_struct *tty, struct file * file,
 994                     unsigned int cmd, unsigned long arg)
 995 {
 996         int error;
 997         struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
 998         int retval;
 999
1000         if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1001                 return -ENODEV;
1002
1003         if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1004             (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD)  &&
1005             (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
1006                 if (tty->flags & (1 << TTY_IO_ERROR))
1007                     return -EIO;
1008         }
1009
1010         switch (cmd) {
1011                 case TCSBRK:    /* SVID version: non-zero arg --> no break */
1012                         retval = tty_check_change(tty);
1013                         if (retval)
1014                                 return retval;
1015                         tty_wait_until_sent(tty, 0);
1016                         if (!arg)
1017                                 send_break(info, 250);  /* 1/4 second */
1018                         return 0;
1019                 case TCSBRKP:   /* support for POSIX tcsendbreak() */
1020                         retval = tty_check_change(tty);
1021                         if (retval)
1022                                 return retval;
1023                         tty_wait_until_sent(tty, 0);
1024                         send_break(info, arg ? arg*(100) : 250);
1025                         return 0;
1026                 case TIOCGSOFTCAR:
1027                         error = put_user(C_CLOCAL(tty) ? 1 : 0,
1028                                     (unsigned long *) arg);
1029                         if (error)
1030                                 return error;
1031                         return 0;
1032                 case TIOCSSOFTCAR:
1033                         get_user(arg, (unsigned long *) arg);
1034                         tty->termios->c_cflag =
1035                                 ((tty->termios->c_cflag & ~CLOCAL) |
1036                                  (arg ? CLOCAL : 0));
1037                         return 0;
1038                 case TIOCGSERIAL:
1039                         if (access_ok(VERIFY_WRITE, (void *) arg,
1040                                                 sizeof(struct serial_struct)))
1041                                 return get_serial_info(info,
1042                                                (struct serial_struct *) arg);
1043                         return -EFAULT;
1044                 case TIOCSSERIAL:
1045                         return set_serial_info(info,
1046                                                (struct serial_struct *) arg);
1047                 case TIOCSERGETLSR: /* Get line status register */
1048                         if (access_ok(VERIFY_WRITE, (void *) arg,
1049                                                 sizeof(unsigned int)))
1050                                 return get_lsr_info(info, (unsigned int *) arg);
1051                         return -EFAULT;
1052                 case TIOCSERGSTRUCT:
1053                         if (!access_ok(VERIFY_WRITE, (void *) arg,
1054                                                 sizeof(struct m68k_serial)))
1055                                 return -EFAULT;
1056                         copy_to_user((struct m68k_serial *) arg,
1057                                     info, sizeof(struct m68k_serial));
1058                         return 0;
1059
1060                 default:
1061                         return -ENOIOCTLCMD;
1062                 }
1063         return 0;
1064 }
1065
1066 static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
1067 {
1068         struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
1069
1070         if (tty->termios->c_cflag == old_termios->c_cflag)
1071                 return;
1072
1073         change_speed(info);
1074
1075         if ((old_termios->c_cflag & CRTSCTS) &&
1076             !(tty->termios->c_cflag & CRTSCTS)) {
1077                 tty->hw_stopped = 0;
1078                 rs_start(tty);
1079         }
1080
1081 }
1082
1083 /*
1084  * ------------------------------------------------------------
1085  * rs_close()
1086  *
1087  * This routine is called when the serial port gets closed.  First, we
1088  * wait for the last remaining data to be sent.  Then, we unlink its
1089  * S structure from the interrupt chain if necessary, and we free
1090  * that IRQ if nothing is left in the chain.
1091  * ------------------------------------------------------------
1092  */
1093 static void rs_close(struct tty_struct *tty, struct file * filp)
1094 {
1095         struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
1096         m68328_uart *uart = &uart_addr[info->line];
1097         unsigned long flags;
1098
1099         if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
1100                 return;
1101
1102         local_irq_save(flags);
1103
1104         if (tty_hung_up_p(filp)) {
1105                 local_irq_restore(flags);
1106                 return;
1107         }
1108
1109         if ((tty->count == 1) && (info->count != 1)) {
1110                 /*
1111                  * Uh, oh.  tty->count is 1, which means that the tty
1112                  * structure will be freed.  Info->count should always
1113                  * be one in these conditions.  If it's greater than
1114                  * one, we've got real problems, since it means the
1115                  * serial port won't be shutdown.
1116                  */
1117                 printk("rs_close: bad serial port count; tty->count is 1, "
1118                        "info->count is %d\n", info->count);
1119                 info->count = 1;
1120         }
1121         if (--info->count < 0) {
1122                 printk("rs_close: bad serial port count for ttyS%d: %d\n",
1123                        info->line, info->count);
1124                 info->count = 0;
1125         }
1126         if (info->count) {
1127                 local_irq_restore(flags);
1128                 return;
1129         }
1130         info->flags |= S_CLOSING;
1131         /*
1132          * Now we wait for the transmit buffer to clear; and we notify
1133          * the line discipline to only process XON/XOFF characters.
1134          */
1135         tty->closing = 1;
1136         if (info->closing_wait != S_CLOSING_WAIT_NONE)
1137                 tty_wait_until_sent(tty, info->closing_wait);
1138         /*
1139          * At this point we stop accepting input.  To do this, we
1140          * disable the receive line status interrupts, and tell the
1141          * interrupt driver to stop checking the data ready bit in the
1142          * line status register.
1143          */
1144
1145         uart->ustcnt &= ~USTCNT_RXEN;
1146         uart->ustcnt &= ~(USTCNT_RXEN | USTCNT_RX_INTR_MASK);
1147
1148         shutdown(info);
1149         if (tty->driver->flush_buffer)
1150                 tty->driver->flush_buffer(tty);
1151
1152         tty_ldisc_flush(tty);
1153         tty->closing = 0;
1154         info->event = 0;
1155         info->tty = 0;
1156 #warning "This is not and has never been valid so fix it"
1157 #if 0
1158         if (tty->ldisc.num != ldiscs[N_TTY].num) {
1159                 if (tty->ldisc.close)
1160                         (tty->ldisc.close)(tty);
1161                 tty->ldisc = ldiscs[N_TTY];
1162                 tty->termios->c_line = N_TTY;
1163                 if (tty->ldisc.open)
1164                         (tty->ldisc.open)(tty);
1165         }
1166 #endif
1167         if (info->blocked_open) {
1168                 if (info->close_delay) {
1169                         msleep_interruptible(jiffies_to_msecs(info->close_delay));
1170                 }
1171                 wake_up_interruptible(&info->open_wait);
1172         }
1173         info->flags &= ~(S_NORMAL_ACTIVE|S_CLOSING);
1174         wake_up_interruptible(&info->close_wait);
1175         local_irq_restore(flags);
1176 }
1177
1178 /*
1179  * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
1180  */
1181 void rs_hangup(struct tty_struct *tty)
1182 {
1183         struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
1184
1185         if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1186                 return;
1187
1188         rs_flush_buffer(tty);
1189         shutdown(info);
1190         info->event = 0;
1191         info->count = 0;
1192         info->flags &= ~S_NORMAL_ACTIVE;
1193         info->tty = 0;
1194         wake_up_interruptible(&info->open_wait);
1195 }
1196
1197 /*
1198  * ------------------------------------------------------------
1199  * rs_open() and friends
1200  * ------------------------------------------------------------
1201  */
1202 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1203                            struct m68k_serial *info)
1204 {
1205         DECLARE_WAITQUEUE(wait, current);
1206         int             retval;
1207         int             do_clocal = 0;
1208
1209         /*
1210          * If the device is in the middle of being closed, then block
1211          * until it's done, and then try again.
1212          */
1213         if (info->flags & S_CLOSING) {
1214                 interruptible_sleep_on(&info->close_wait);
1215 #ifdef SERIAL_DO_RESTART
1216                 if (info->flags & S_HUP_NOTIFY)
1217                         return -EAGAIN;
1218                 else
1219                         return -ERESTARTSYS;
1220 #else
1221                 return -EAGAIN;
1222 #endif
1223         }
1224
1225         /*
1226          * If non-blocking mode is set, or the port is not enabled,
1227          * then make the check up front and then exit.
1228          */
1229         if ((filp->f_flags & O_NONBLOCK) ||
1230             (tty->flags & (1 << TTY_IO_ERROR))) {
1231                 info->flags |= S_NORMAL_ACTIVE;
1232                 return 0;
1233         }
1234
1235         if (tty->termios->c_cflag & CLOCAL)
1236                 do_clocal = 1;
1237
1238         /*
1239          * Block waiting for the carrier detect and the line to become
1240          * free (i.e., not in use by the callout).  While we are in
1241          * this loop, info->count is dropped by one, so that
1242          * rs_close() knows when to free things.  We restore it upon
1243          * exit, either normal or abnormal.
1244          */
1245         retval = 0;
1246         add_wait_queue(&info->open_wait, &wait);
1247
1248         info->count--;
1249         info->blocked_open++;
1250         while (1) {
1251                 local_irq_disable();
1252                 m68k_rtsdtr(info, 1);
1253                 local_irq_enable();
1254                 current->state = TASK_INTERRUPTIBLE;
1255                 if (tty_hung_up_p(filp) ||
1256                     !(info->flags & S_INITIALIZED)) {
1257 #ifdef SERIAL_DO_RESTART
1258                         if (info->flags & S_HUP_NOTIFY)
1259                                 retval = -EAGAIN;
1260                         else
1261                                 retval = -ERESTARTSYS;
1262 #else
1263                         retval = -EAGAIN;
1264 #endif
1265                         break;
1266                 }
1267                 if (!(info->flags & S_CLOSING) && do_clocal)
1268                         break;
1269                 if (signal_pending(current)) {
1270                         retval = -ERESTARTSYS;
1271                         break;
1272                 }
1273                 schedule();
1274         }
1275         current->state = TASK_RUNNING;
1276         remove_wait_queue(&info->open_wait, &wait);
1277         if (!tty_hung_up_p(filp))
1278                 info->count++;
1279         info->blocked_open--;
1280
1281         if (retval)
1282                 return retval;
1283         info->flags |= S_NORMAL_ACTIVE;
1284         return 0;
1285 }
1286
1287 /*
1288  * This routine is called whenever a serial port is opened.  It
1289  * enables interrupts for a serial port, linking in its S structure into
1290  * the IRQ chain.   It also performs the serial-specific
1291  * initialization for the tty structure.
1292  */
1293 int rs_open(struct tty_struct *tty, struct file * filp)
1294 {
1295         struct m68k_serial      *info;
1296         int                     retval, line;
1297
1298         line = tty->index;
1299
1300         if (line >= NR_PORTS || line < 0) /* we have exactly one */
1301                 return -ENODEV;
1302
1303         info = &m68k_soft[line];
1304
1305         if (serial_paranoia_check(info, tty->name, "rs_open"))
1306                 return -ENODEV;
1307
1308         info->count++;
1309         tty->driver_data = info;
1310         info->tty = tty;
1311
1312         /*
1313          * Start up serial port
1314          */
1315         retval = startup(info);
1316         if (retval)
1317                 return retval;
1318
1319         return block_til_ready(tty, filp, info);
1320 }
1321
1322 /* Finally, routines used to initialize the serial driver. */
1323
1324 static void show_serial_version(void)
1325 {
1326         printk("MC68328 serial driver version 1.00\n");
1327 }
1328
1329 #ifdef CONFIG_PM_LEGACY
1330 /* Serial Power management
1331  *  The console (currently fixed at line 0) is a special case for power
1332  *  management because the kernel is so chatty. The console will be
1333  *  explicitly disabled my our power manager as the last minute, so we won't
1334  *  mess with it here.
1335  */
1336 static struct pm_dev *serial_pm[NR_PORTS];
1337
1338 static int serial_pm_callback(struct pm_dev *dev, pm_request_t request, void *data)
1339 {
1340         struct m68k_serial *info = (struct m68k_serial *)dev->data;
1341
1342         if(info == NULL)
1343                 return -1;
1344
1345         /* special case for line 0 - pm restores it */
1346         if(info->line == 0)
1347                 return 0;
1348
1349         switch (request) {
1350         case PM_SUSPEND:
1351                 shutdown(info);
1352                 break;
1353
1354         case PM_RESUME:
1355                 startup(info);
1356                 break;
1357         }
1358         return 0;
1359 }
1360
1361 void shutdown_console(void)
1362 {
1363         struct m68k_serial *info = &m68k_soft[0];
1364
1365         /* HACK: wait a bit for any pending printk's to be dumped */
1366         {
1367                 int i = 10000;
1368                 while(i--);
1369         }
1370
1371         shutdown(info);
1372 }
1373
1374 void startup_console(void)
1375 {
1376         struct m68k_serial *info = &m68k_soft[0];
1377         startup(info);
1378 }
1379 #endif /* CONFIG_PM_LEGACY */
1380
1381
1382 static struct tty_operations rs_ops = {
1383         .open = rs_open,
1384         .close = rs_close,
1385         .write = rs_write,
1386         .flush_chars = rs_flush_chars,
1387         .write_room = rs_write_room,
1388         .chars_in_buffer = rs_chars_in_buffer,
1389         .flush_buffer = rs_flush_buffer,
1390         .ioctl = rs_ioctl,
1391         .throttle = rs_throttle,
1392         .unthrottle = rs_unthrottle,
1393         .set_termios = rs_set_termios,
1394         .stop = rs_stop,
1395         .start = rs_start,
1396         .hangup = rs_hangup,
1397         .set_ldisc = rs_set_ldisc,
1398 };
1399
1400 /* rs_init inits the driver */
1401 static int __init
1402 rs68328_init(void)
1403 {
1404         int flags, i;
1405         struct m68k_serial *info;
1406
1407         serial_driver = alloc_tty_driver(NR_PORTS);
1408         if (!serial_driver)
1409                 return -ENOMEM;
1410
1411         show_serial_version();
1412
1413         /* Initialize the tty_driver structure */
1414         /* SPARC: Not all of this is exactly right for us. */
1415
1416         serial_driver->name = "ttyS";
1417         serial_driver->major = TTY_MAJOR;
1418         serial_driver->minor_start = 64;
1419         serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
1420         serial_driver->subtype = SERIAL_TYPE_NORMAL;
1421         serial_driver->init_termios = tty_std_termios;
1422         serial_driver->init_termios.c_cflag =
1423                         m68328_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL;
1424         serial_driver->flags = TTY_DRIVER_REAL_RAW;
1425         tty_set_operations(serial_driver, &rs_ops);
1426
1427         if (tty_register_driver(serial_driver)) {
1428                 put_tty_driver(serial_driver);
1429                 printk(KERN_ERR "Couldn't register serial driver\n");
1430                 return -ENOMEM;
1431         }
1432
1433         local_irq_save(flags);
1434
1435         for(i=0;i<NR_PORTS;i++) {
1436
1437             info = &m68k_soft[i];
1438             info->magic = SERIAL_MAGIC;
1439             info->port = (int) &uart_addr[i];
1440             info->tty = 0;
1441             info->irq = uart_irqs[i];
1442             info->custom_divisor = 16;
1443             info->close_delay = 50;
1444             info->closing_wait = 3000;
1445             info->x_char = 0;
1446             info->event = 0;
1447             info->count = 0;
1448             info->blocked_open = 0;
1449             INIT_WORK(&info->tqueue, do_softint, info);
1450             INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info);
1451             init_waitqueue_head(&info->open_wait);
1452             init_waitqueue_head(&info->close_wait);
1453             info->line = i;
1454             info->is_cons = 1; /* Means shortcuts work */
1455
1456             printk("%s%d at 0x%08x (irq = %d)", serial_driver->name, info->line,
1457                    info->port, info->irq);
1458             printk(" is a builtin MC68328 UART\n");
1459
1460             IRQ_ports[info->irq] = info;        /* waste of space */
1461
1462 #ifdef CONFIG_M68VZ328
1463                 if (i > 0 )
1464                         PJSEL &= 0xCF;  /* PSW enable second port output */
1465 #endif
1466
1467             if (request_irq(uart_irqs[i],
1468                             rs_interrupt,
1469                             IRQ_FLG_STD,
1470                             "M68328_UART", NULL))
1471                 panic("Unable to attach 68328 serial interrupt\n");
1472 #ifdef CONFIG_PM_LEGACY
1473             serial_pm[i] = pm_register(PM_SYS_DEV, PM_SYS_COM, serial_pm_callback);
1474             if (serial_pm[i])
1475                     serial_pm[i]->data = info;
1476 #endif
1477         }
1478         local_irq_restore(flags);
1479         return 0;
1480 }
1481
1482 module_init(rs68328_init);
1483
1484
1485
1486 static void m68328_set_baud(void)
1487 {
1488         unsigned short ustcnt;
1489         int     i;
1490
1491         ustcnt = USTCNT;
1492         USTCNT = ustcnt & ~USTCNT_TXEN;
1493
1494 again:
1495         for (i = 0; i < sizeof(baud_table) / sizeof(baud_table[0]); i++)
1496                 if (baud_table[i] == m68328_console_baud)
1497                         break;
1498         if (i >= sizeof(baud_table) / sizeof(baud_table[0])) {
1499                 m68328_console_baud = 9600;
1500                 goto again;
1501         }
1502
1503         UBAUD = PUT_FIELD(UBAUD_DIVIDE,    hw_baud_table[i].divisor) |
1504                 PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale);
1505         ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7);
1506         ustcnt |= USTCNT_8_7;
1507         ustcnt |= USTCNT_TXEN;
1508         USTCNT = ustcnt;
1509         m68328_console_initted = 1;
1510         return;
1511 }
1512
1513
1514 int m68328_console_setup(struct console *cp, char *arg)
1515 {
1516         int             i, n = CONSOLE_BAUD_RATE;
1517
1518         if (!cp)
1519                 return(-1);
1520
1521         if (arg)
1522                 n = simple_strtoul(arg,NULL,0);
1523
1524         for (i = 0; i < BAUD_TABLE_SIZE; i++)
1525                 if (baud_table[i] == n)
1526                         break;
1527         if (i < BAUD_TABLE_SIZE) {
1528                 m68328_console_baud = n;
1529                 m68328_console_cbaud = 0;
1530                 if (i > 15) {
1531                         m68328_console_cbaud |= CBAUDEX;
1532                         i -= 15;
1533                 }
1534                 m68328_console_cbaud |= i;
1535         }
1536
1537         m68328_set_baud(); /* make sure baud rate changes */
1538         return(0);
1539 }
1540
1541
1542 static struct tty_driver *m68328_console_device(struct console *c, int *index)
1543 {
1544         *index = c->index;
1545         return serial_driver;
1546 }
1547
1548
1549 void m68328_console_write (struct console *co, const char *str,
1550                            unsigned int count)
1551 {
1552         if (!m68328_console_initted)
1553                 m68328_set_baud();
1554     while (count--) {
1555         if (*str == '\n')
1556            rs_put_char('\r');
1557         rs_put_char( *str++ );
1558     }
1559 }
1560
1561
1562 static struct console m68328_driver = {
1563         .name           = "ttyS",
1564         .write          = m68328_console_write,
1565         .device         = m68328_console_device,
1566         .setup          = m68328_console_setup,
1567         .flags          = CON_PRINTBUFFER,
1568         .index          = -1,
1569 };
1570
1571
1572 static int __init m68328_console_init(void)
1573 {
1574         register_console(&m68328_driver);
1575         return 0;
1576 }
1577
1578 console_initcall(m68328_console_init);