target/linux/sibyte-2.6/patches/000-DUART.patch

   1 --- linux-2.6.16.7/drivers/char/Kconfig 2006-04-21 14:38:30.000000000 -0700
   2 +++ linux-2.6.16.7/drivers/char/Kconfig 2006-04-21 14:39:29.000000000 -0700
   3 @@ -340,6 +340,14 @@
   4           To compile this driver as a module, choose M here: the
   5           module will be called istallion.
   6
   7 +config SIBYTE_SB1250_DUART
   8 +       bool "Support for BCM1xxx onchip DUART"
   9 +       depends on MIPS && SIBYTE_SB1xxx_SOC=y
  10 +
  11 +config SIBYTE_SB1250_DUART_CONSOLE
  12 +       bool "Console on BCM1xxx DUART"
  13 +       depends on SIBYTE_SB1250_DUART
  14 +
  15  config AU1000_UART
  16         bool "Enable Au1000 UART Support"
  17         depends on SERIAL_NONSTANDARD && MIPS
  18 diff -Nurb linux-2.6.16.7/drivers/char/Makefile linux-2.6.16.7/drivers/char/Makefile
  19 --- linux-2.6.16.7/drivers/char/Makefile        2006-04-17 14:53:25.000000000 -0700
  20 +++ linux-2.6.16.7/drivers/char/Makefile        2006-04-28 12:14:24.000000000 -0700
  21 @@ -31,6 +31,7 @@
  22  obj-$(CONFIG_A2232)            += ser_a2232.o generic_serial.o
  23  obj-$(CONFIG_ATARI_DSP56K)     += dsp56k.o
  24  obj-$(CONFIG_MOXA_SMARTIO)     += mxser.o
  25 +obj-$(CONFIG_SIBYTE_SB1250_DUART) += sb1250_duart.o
  26  obj-$(CONFIG_COMPUTONE)                += ip2.o ip2main.o
  27  obj-$(CONFIG_RISCOM8)          += riscom8.o
  28  obj-$(CONFIG_ISI)              += isicom.o
  29 diff -Nurb linux-2.6.16.7/drivers/char/sb1250_duart.c linux-2.6.16.7/drivers/char/sb1250_duart.c
  30 --- linux-2.6.16.7/drivers/char/sb1250_duart.c  1969-12-31 16:00:00.000000000 -0800
  31 +++ linux-2.6.16.7/drivers/char/sb1250_duart.c  2006-04-28 12:13:49.000000000 -0700
  32 @@ -0,0 +1,911 @@
  33 +/*
  34 + * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
  35 + *
  36 + * This program is free software; you can redistribute it and/or
  37 + * modify it under the terms of the GNU General Public License
  38 + * as published by the Free Software Foundation; either version 2
  39 + * of the License, or (at your option) any later version.
  40 + *
  41 + * This program is distributed in the hope that it will be useful,
  42 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  43 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  44 + * GNU General Public License for more details.
  45 + *
  46 + * You should have received a copy of the GNU General Public License
  47 + * along with this program; if not, write to the Free Software
  48 + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  49 + */
  50 +
  51 +/*
  52 + * Driver support for the on-chip sb1250 dual-channel serial port,
  53 + * running in asynchronous mode.  Also, support for doing a serial console
  54 + * on one of those ports
  55 + */
  56 +#include <linux/config.h>
  57 +#include <linux/types.h>
  58 +#include <linux/kernel.h>
  59 +#include <linux/serial.h>
  60 +#include <linux/interrupt.h>
  61 +#include <linux/module.h>
  62 +#include <linux/console.h>
  63 +#include <linux/kdev_t.h>
  64 +#include <linux/major.h>
  65 +#include <linux/termios.h>
  66 +#include <linux/spinlock.h>
  67 +#include <linux/irq.h>
  68 +#include <linux/errno.h>
  69 +#include <linux/tty.h>
  70 +#include <linux/sched.h>
  71 +#include <linux/tty_flip.h>
  72 +#include <linux/timer.h>
  73 +#include <linux/init.h>
  74 +#include <linux/mm.h>
  75 +#include <asm/delay.h>
  76 +#include <asm/io.h>
  77 +#include <asm/uaccess.h>
  78 +#include <asm/sibyte/swarm.h>
  79 +#include <asm/sibyte/sb1250.h>
  80 +#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
  81 +#include <asm/sibyte/bcm1480_regs.h>
  82 +#include <asm/sibyte/bcm1480_int.h>
  83 +#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  84 +#include <asm/sibyte/sb1250_regs.h>
  85 +#include <asm/sibyte/sb1250_int.h>
  86 +#else
  87 +#error invalid SiByte UART configuation
  88 +#endif
  89 +#include <asm/sibyte/sb1250_uart.h>
  90 +#include <asm/war.h>
  91 +
  92 +#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
  93 +#define UNIT_CHANREG(n,reg)    A_BCM1480_DUART_CHANREG((n),(reg))
  94 +#define UNIT_IMRREG(n)         A_BCM1480_DUART_IMRREG(n)
  95 +#define UNIT_INT(n)            (K_BCM1480_INT_UART_0 + (n))
  96 +#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  97 +#define UNIT_CHANREG(n,reg)    A_DUART_CHANREG((n),(reg))
  98 +#define UNIT_IMRREG(n)         A_DUART_IMRREG(n)
  99 +#define UNIT_INT(n)            (K_INT_UART_0 + (n))
 100 +#else
 101 +#error invalid SiByte UART configuation
 102 +#endif
 103 +
 104 +/* Toggle spewing of debugging output */
 105 +#undef DEBUG
 106 +
 107 +#define DEFAULT_CFLAGS          (CS8 | B115200)
 108 +
 109 +#define TX_INTEN          1
 110 +#define DUART_INITIALIZED 2
 111 +
 112 +#define DUART_MAX_LINE 4
 113 +char sb1250_duart_present[DUART_MAX_LINE];
 114 +EXPORT_SYMBOL(sb1250_duart_present);
 115 +
 116 +/*
 117 + * Still not sure what the termios structures set up here are for,
 118 + *  but we have to supply pointers to them to register the tty driver
 119 + */
 120 +static struct tty_driver *sb1250_duart_driver; //, sb1250_duart_callout_driver;
 121 +
 122 +/*
 123 + * This lock protects both the open flags for all the uart states as
 124 + * well as the reference count for the module
 125 + */
 126 +static DEFINE_SPINLOCK(open_lock);
 127 +
 128 +typedef struct {
 129 +       unsigned char       outp_buf[SERIAL_XMIT_SIZE];
 130 +       unsigned int        outp_head;
 131 +       unsigned int        outp_tail;
 132 +       unsigned int        outp_count;
 133 +       spinlock_t          outp_lock;
 134 +       unsigned int        open;
 135 +       unsigned int        line;
 136 +       unsigned int        last_cflags;
 137 +       unsigned long       flags;
 138 +       struct tty_struct   *tty;
 139 +       /* CSR addresses */
 140 +       volatile u32        *status;
 141 +       volatile u32        *imr;
 142 +       volatile u32        *tx_hold;
 143 +       volatile u32        *rx_hold;
 144 +       volatile u32        *mode_1;
 145 +       volatile u32        *mode_2;
 146 +       volatile u32        *clk_sel;
 147 +       volatile u32        *cmd;
 148 +} uart_state_t;
 149 +
 150 +static uart_state_t uart_states[DUART_MAX_LINE];
 151 +
 152 +/*
 153 + * Inline functions local to this module
 154 + */
 155 +
 156 +/*
 157 + * In bug 1956, we get glitches that can mess up uart registers.  This
 158 + * "write-mode-1 after any register access" is the accepted
 159 + * workaround.
 160 + */
 161 +#if SIBYTE_1956_WAR
 162 +static unsigned int last_mode1[DUART_MAX_LINE];
 163 +#endif
 164 +
 165 +static inline u32 READ_SERCSR(volatile u32 *addr, int line)
 166 +{
 167 +       u32 val = csr_in32(addr);
 168 +#if SIBYTE_1956_WAR
 169 +       csr_out32(last_mode1[line], uart_states[line].mode_1);
 170 +#endif
 171 +       return val;
 172 +}
 173 +
 174 +static inline void WRITE_SERCSR(u32 val, volatile u32 *addr, int line)
 175 +{
 176 +       csr_out32(val, addr);
 177 +#if SIBYTE_1956_WAR
 178 +       csr_out32(last_mode1[line], uart_states[line].mode_1);
 179 +#endif
 180 +}
 181 +
 182 +static void init_duart_port(uart_state_t *port, int line)
 183 +{
 184 +       if (!(port->flags & DUART_INITIALIZED)) {
 185 +               port->line = line;
 186 +               port->status = IOADDR(UNIT_CHANREG(line, R_DUART_STATUS));
 187 +               port->imr = IOADDR(UNIT_IMRREG(line));
 188 +               port->tx_hold = IOADDR(UNIT_CHANREG(line, R_DUART_TX_HOLD));
 189 +               port->rx_hold = IOADDR(UNIT_CHANREG(line, R_DUART_RX_HOLD));
 190 +               port->mode_1 = IOADDR(UNIT_CHANREG(line, R_DUART_MODE_REG_1));
 191 +               port->mode_2 = IOADDR(UNIT_CHANREG(line, R_DUART_MODE_REG_2));
 192 +               port->clk_sel = IOADDR(UNIT_CHANREG(line, R_DUART_CLK_SEL));
 193 +               port->cmd = IOADDR(UNIT_CHANREG(line, R_DUART_CMD));
 194 +               port->flags |= DUART_INITIALIZED;
 195 +       }
 196 +}
 197 +
 198 +/*
 199 + * Mask out the passed interrupt lines at the duart level.  This should be
 200 + * called while holding the associated outp_lock.
 201 + */
 202 +static inline void duart_mask_ints(unsigned int line, unsigned int mask)
 203 +{
 204 +       uart_state_t *port = uart_states + line;
 205 +       u64 tmp = READ_SERCSR(port->imr, line);
 206 +       WRITE_SERCSR(tmp & ~mask, port->imr, line);
 207 +}
 208 +
 209 +
 210 +/* Unmask the passed interrupt lines at the duart level */
 211 +static inline void duart_unmask_ints(unsigned int line, unsigned int mask)
 212 +{
 213 +       uart_state_t *port = uart_states + line;
 214 +       u64 tmp = READ_SERCSR(port->imr, line);
 215 +       WRITE_SERCSR(tmp | mask, port->imr, line);
 216 +}
 217 +
 218 +static inline void transmit_char_pio(uart_state_t *us)
 219 +{
 220 +       struct tty_struct *tty = us->tty;
 221 +       int blocked = 0;
 222 +
 223 +       if (spin_trylock(&us->outp_lock)) {
 224 +               for (;;) {
 225 +                       if (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_RDY))
 226 +                               break;
 227 +                       if (us->outp_count <= 0 || tty->stopped || tty->hw_stopped) {
 228 +                               break;
 229 +                       } else {
 230 +                               WRITE_SERCSR(us->outp_buf[us->outp_head],
 231 +                                            us->tx_hold, us->line);
 232 +                               us->outp_head = (us->outp_head + 1) & (SERIAL_XMIT_SIZE-1);
 233 +                               if (--us->outp_count <= 0)
 234 +                                       break;
 235 +                       }
 236 +                       udelay(10);
 237 +               }
 238 +               spin_unlock(&us->outp_lock);
 239 +       } else {
 240 +               blocked = 1;
 241 +       }
 242 +
 243 +       if (!us->outp_count || tty->stopped ||
 244 +           tty->hw_stopped || blocked) {
 245 +               us->flags &= ~TX_INTEN;
 246 +               duart_mask_ints(us->line, M_DUART_IMR_TX);
 247 +       }
 248 +
 249 +       if (us->open &&
 250 +           (us->outp_count < (SERIAL_XMIT_SIZE/2))) {
 251 +               /*
 252 +                * We told the discipline at one point that we had no
 253 +                * space, so it went to sleep.  Wake it up when we hit
 254 +                * half empty
 255 +                */
 256 +               if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
 257 +                   tty->ldisc.write_wakeup)
 258 +                       tty->ldisc.write_wakeup(tty);
 259 +               wake_up_interruptible(&tty->write_wait);
 260 +       }
 261 +}
 262 +
 263 +/*
 264 + * Generic interrupt handler for both channels.  dev_id is a pointer
 265 + * to the proper uart_states structure, so from that we can derive
 266 + * which port interrupted
 267 + */
 268 +
 269 +static irqreturn_t duart_int(int irq, void *dev_id, struct pt_regs *regs)
 270 +{
 271 +       uart_state_t *us = (uart_state_t *)dev_id;
 272 +       struct tty_struct *tty = us->tty;
 273 +       unsigned int status = READ_SERCSR(us->status, us->line);
 274 +
 275 +       pr_debug("DUART INT\n");
 276 +
 277 +       if (status & M_DUART_RX_RDY) {
 278 +               int counter = 2048;
 279 +               unsigned int ch;
 280 +
 281 +               if (status & M_DUART_OVRUN_ERR)
 282 +                       tty_insert_flip_char(tty, 0, TTY_OVERRUN);
 283 +               if (status & M_DUART_PARITY_ERR) {
 284 +                       printk("Parity error!\n");
 285 +               } else if (status & M_DUART_FRM_ERR) {
 286 +                       printk("Frame error!\n");
 287 +               }
 288 +
 289 +               while (counter > 0) {
 290 +                       if (!(READ_SERCSR(us->status, us->line) & M_DUART_RX_RDY))
 291 +                               break;
 292 +                       ch = READ_SERCSR(us->rx_hold, us->line);
 293 +                       tty_insert_flip_char(tty, ch, 0);
 294 +                       udelay(1);
 295 +                       counter--;
 296 +               }
 297 +               tty_flip_buffer_push(tty);
 298 +       }
 299 +
 300 +       if (status & M_DUART_TX_RDY) {
 301 +               transmit_char_pio(us);
 302 +       }
 303 +
 304 +       return IRQ_HANDLED;
 305 +}
 306 +
 307 +/*
 308 + *  Actual driver functions
 309 + */
 310 +
 311 +/* Return the number of characters we can accomodate in a write at this instant */
 312 +static int duart_write_room(struct tty_struct *tty)
 313 +{
 314 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 315 +       int retval;
 316 +
 317 +       retval = SERIAL_XMIT_SIZE - us->outp_count;
 318 +
 319 +       pr_debug("duart_write_room called, returning %i\n", retval);
 320 +
 321 +       return retval;
 322 +}
 323 +
 324 +/* memcpy the data from src to destination, but take extra care if the
 325 +   data is coming from user space */
 326 +static inline int copy_buf(char *dest, const char *src, int size, int from_user)
 327 +{
 328 +       if (from_user) {
 329 +               (void) copy_from_user(dest, src, size);
 330 +       } else {
 331 +               memcpy(dest, src, size);
 332 +       }
 333 +       return size;
 334 +}
 335 +
 336 +/*
 337 + * Buffer up to count characters from buf to be written.  If we don't have
 338 + * other characters buffered, enable the tx interrupt to start sending
 339 + */
 340 +static int duart_write(struct tty_struct *tty, const unsigned char *buf,
 341 +                      int count)
 342 +{
 343 +       uart_state_t *us;
 344 +       int c, t, total = 0;
 345 +       unsigned long flags;
 346 +
 347 +       if (!tty) return 0;
 348 +
 349 +       us = tty->driver_data;
 350 +       if (!us) return 0;
 351 +
 352 +       pr_debug("duart_write called for %i chars by %i (%s)\n", count, current->pid, current->comm);
 353 +
 354 +       spin_lock_irqsave(&us->outp_lock, flags);
 355 +
 356 +       for (;;) {
 357 +               c = count;
 358 +
 359 +               t = SERIAL_XMIT_SIZE - us->outp_tail;
 360 +               if (t < c) c = t;
 361 +
 362 +               t = SERIAL_XMIT_SIZE - 1 - us->outp_count;
 363 +               if (t < c) c = t;
 364 +
 365 +               if (c <= 0) break;
 366 +
 367 +               memcpy(us->outp_buf + us->outp_tail, buf, c);
 368 +
 369 +               us->outp_count += c;
 370 +               us->outp_tail = (us->outp_tail + c) & (SERIAL_XMIT_SIZE - 1);
 371 +               buf += c;
 372 +               count -= c;
 373 +               total += c;
 374 +       }
 375 +
 376 +       spin_unlock_irqrestore(&us->outp_lock, flags);
 377 +
 378 +       if (us->outp_count && !tty->stopped &&
 379 +           !tty->hw_stopped && !(us->flags & TX_INTEN)) {
 380 +               us->flags |= TX_INTEN;
 381 +               duart_unmask_ints(us->line, M_DUART_IMR_TX);
 382 +       }
 383 +
 384 +       return total;
 385 +}
 386 +
 387 +
 388 +/* Buffer one character to be written.  If there's not room for it, just drop
 389 +   it on the floor.  This is used for echo, among other things */
 390 +static void duart_put_char(struct tty_struct *tty, u_char ch)
 391 +{
 392 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 393 +       unsigned long flags;
 394 +
 395 +       pr_debug("duart_put_char called.  Char is %x (%c)\n", (int)ch, ch);
 396 +
 397 +       spin_lock_irqsave(&us->outp_lock, flags);
 398 +
 399 +       if (us->outp_count == SERIAL_XMIT_SIZE) {
 400 +               spin_unlock_irqrestore(&us->outp_lock, flags);
 401 +               return;
 402 +       }
 403 +
 404 +       us->outp_buf[us->outp_tail] = ch;
 405 +       us->outp_tail = (us->outp_tail + 1) &(SERIAL_XMIT_SIZE-1);
 406 +       us->outp_count++;
 407 +
 408 +       spin_unlock_irqrestore(&us->outp_lock, flags);
 409 +}
 410 +
 411 +static void duart_flush_chars(struct tty_struct * tty)
 412 +{
 413 +       uart_state_t *port;
 414 +
 415 +       if (!tty) return;
 416 +
 417 +       port = tty->driver_data;
 418 +
 419 +       if (!port) return;
 420 +
 421 +       if (port->outp_count <= 0 || tty->stopped || tty->hw_stopped) {
 422 +               return;
 423 +       }
 424 +
 425 +       port->flags |= TX_INTEN;
 426 +       duart_unmask_ints(port->line, M_DUART_IMR_TX);
 427 +}
 428 +
 429 +/* Return the number of characters in the output buffer that have yet to be
 430 +   written */
 431 +static int duart_chars_in_buffer(struct tty_struct *tty)
 432 +{
 433 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 434 +       int retval;
 435 +
 436 +       retval = us->outp_count;
 437 +
 438 +       pr_debug("duart_chars_in_buffer returning %i\n", retval);
 439 +
 440 +       return retval;
 441 +}
 442 +
 443 +/* Kill everything we haven't yet shoved into the FIFO.  Turn off the
 444 +   transmit interrupt since we've nothing more to transmit */
 445 +static void duart_flush_buffer(struct tty_struct *tty)
 446 +{
 447 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 448 +       unsigned long flags;
 449 +
 450 +       pr_debug("duart_flush_buffer called\n");
 451 +       spin_lock_irqsave(&us->outp_lock, flags);
 452 +       us->outp_head = us->outp_tail = us->outp_count = 0;
 453 +       spin_unlock_irqrestore(&us->outp_lock, flags);
 454 +
 455 +       wake_up_interruptible(&us->tty->write_wait);
 456 +       if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
 457 +           tty->ldisc.write_wakeup)
 458 +               tty->ldisc.write_wakeup(tty);
 459 +}
 460 +
 461 +
 462 +/* See sb1250 user manual for details on these registers */
 463 +static inline void duart_set_cflag(unsigned int line, unsigned int cflag)
 464 +{
 465 +       unsigned int mode_reg1 = 0, mode_reg2 = 0;
 466 +       unsigned int clk_divisor;
 467 +       uart_state_t *port = uart_states + line;
 468 +
 469 +       switch (cflag & CSIZE) {
 470 +       case CS7:
 471 +               mode_reg1 |= V_DUART_BITS_PER_CHAR_7;
 472 +
 473 +       default:
 474 +               /* We don't handle CS5 or CS6...is there a way we're supposed to flag this?
 475 +                  right now we just force them to CS8 */
 476 +               mode_reg1 |= 0x0;
 477 +               break;
 478 +       }
 479 +       if (cflag & CSTOPB) {
 480 +               mode_reg2 |= M_DUART_STOP_BIT_LEN_2;
 481 +       }
 482 +       if (!(cflag & PARENB)) {
 483 +               mode_reg1 |= V_DUART_PARITY_MODE_NONE;
 484 +       }
 485 +       if (cflag & PARODD) {
 486 +               mode_reg1 |= M_DUART_PARITY_TYPE_ODD;
 487 +       }
 488 +
 489 +       /* Formula for this is (5000000/baud)-1, but we saturate
 490 +          at 12 bits, which means we can't actually do anything less
 491 +          that 1200 baud */
 492 +       switch (cflag & CBAUD) {
 493 +       case B200:
 494 +       case B300:
 495 +       case B1200:     clk_divisor = 4095;             break;
 496 +       case B1800:     clk_divisor = 2776;             break;
 497 +       case B2400:     clk_divisor = 2082;             break;
 498 +       case B4800:     clk_divisor = 1040;             break;
 499 +       default:
 500 +       case B9600:     clk_divisor = 519;              break;
 501 +       case B19200:    clk_divisor = 259;              break;
 502 +       case B38400:    clk_divisor = 129;              break;
 503 +       case B57600:    clk_divisor = 85;               break;
 504 +       case B115200:   clk_divisor = 42;               break;
 505 +       }
 506 +       WRITE_SERCSR(mode_reg1, port->mode_1, port->line);
 507 +       WRITE_SERCSR(mode_reg2, port->mode_2, port->line);
 508 +       WRITE_SERCSR(clk_divisor, port->clk_sel, port->line);
 509 +       port->last_cflags = cflag;
 510 +}
 511 +
 512 +
 513 +/* Handle notification of a termios change.  */
 514 +static void duart_set_termios(struct tty_struct *tty, struct termios *old)
 515 +{
 516 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 517 +
 518 +       pr_debug("duart_set_termios called by %i (%s)\n", current->pid, current->comm);
 519 +       if (old && tty->termios->c_cflag == old->c_cflag)
 520 +               return;
 521 +       duart_set_cflag(us->line, tty->termios->c_cflag);
 522 +}
 523 +
 524 +static int get_serial_info(uart_state_t *us, struct serial_struct * retinfo) {
 525 +
 526 +       struct serial_struct tmp;
 527 +
 528 +       memset(&tmp, 0, sizeof(tmp));
 529 +
 530 +       tmp.type=PORT_SB1250;
 531 +       tmp.line=us->line;
 532 +       tmp.port=UNIT_CHANREG(tmp.line,0);
 533 +       tmp.irq=UNIT_INT(tmp.line);
 534 +       tmp.xmit_fifo_size=16; /* fixed by hw */
 535 +       tmp.baud_base=5000000;
 536 +       tmp.io_type=SERIAL_IO_MEM;
 537 +
 538 +       if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
 539 +               return -EFAULT;
 540 +
 541 +       return 0;
 542 +}
 543 +
 544 +static int duart_ioctl(struct tty_struct *tty, struct file * file,
 545 +                      unsigned int cmd, unsigned long arg)
 546 +{
 547 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 548 +
 549 +/*     if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
 550 +       return -ENODEV;*/
 551 +       switch (cmd) {
 552 +       case TIOCMGET:
 553 +               printk("Ignoring TIOCMGET\n");
 554 +               break;
 555 +       case TIOCMBIS:
 556 +               printk("Ignoring TIOCMBIS\n");
 557 +               break;
 558 +       case TIOCMBIC:
 559 +               printk("Ignoring TIOCMBIC\n");
 560 +               break;
 561 +       case TIOCMSET:
 562 +               printk("Ignoring TIOCMSET\n");
 563 +               break;
 564 +       case TIOCGSERIAL:
 565 +               return get_serial_info(us,(struct serial_struct *) arg);
 566 +       case TIOCSSERIAL:
 567 +               printk("Ignoring TIOCSSERIAL\n");
 568 +               break;
 569 +       case TIOCSERCONFIG:
 570 +               printk("Ignoring TIOCSERCONFIG\n");
 571 +               break;
 572 +       case TIOCSERGETLSR: /* Get line status register */
 573 +               printk("Ignoring TIOCSERGETLSR\n");
 574 +               break;
 575 +       case TIOCSERGSTRUCT:
 576 +               printk("Ignoring TIOCSERGSTRUCT\n");
 577 +               break;
 578 +       case TIOCMIWAIT:
 579 +               printk("Ignoring TIOCMIWAIT\n");
 580 +               break;
 581 +       case TIOCGICOUNT:
 582 +               printk("Ignoring TIOCGICOUNT\n");
 583 +               break;
 584 +       case TIOCSERGWILD:
 585 +               printk("Ignoring TIOCSERGWILD\n");
 586 +               break;
 587 +       case TIOCSERSWILD:
 588 +               printk("Ignoring TIOCSERSWILD\n");
 589 +               break;
 590 +       default:
 591 +               break;
 592 +       }
 593 +//     printk("Ignoring IOCTL %x from pid %i (%s)\n", cmd, current->pid, current->comm);
 594 +       return -ENOIOCTLCMD;
 595 +}
 596 +
 597 +/* XXXKW locking? */
 598 +static void duart_start(struct tty_struct *tty)
 599 +{
 600 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 601 +
 602 +       pr_debug("duart_start called\n");
 603 +
 604 +       if (us->outp_count && !(us->flags & TX_INTEN)) {
 605 +               us->flags |= TX_INTEN;
 606 +               duart_unmask_ints(us->line, M_DUART_IMR_TX);
 607 +       }
 608 +}
 609 +
 610 +/* XXXKW locking? */
 611 +static void duart_stop(struct tty_struct *tty)
 612 +{
 613 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 614 +
 615 +       pr_debug("duart_stop called\n");
 616 +
 617 +       if (us->outp_count && (us->flags & TX_INTEN)) {
 618 +               us->flags &= ~TX_INTEN;
 619 +               duart_mask_ints(us->line, M_DUART_IMR_TX);
 620 +       }
 621 +}
 622 +
 623 +/* Not sure on the semantics of this; are we supposed to wait until the stuff
 624 +   already in the hardware FIFO drains, or are we supposed to wait until
 625 +   we've drained the output buffer, too?  I'm assuming the former, 'cause thats
 626 +   what the other drivers seem to assume
 627 +*/
 628 +
 629 +static void duart_wait_until_sent(struct tty_struct *tty, int timeout)
 630 +{
 631 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 632 +       unsigned long orig_jiffies;
 633 +
 634 +       orig_jiffies = jiffies;
 635 +       pr_debug("duart_wait_until_sent(%d)+\n", timeout);
 636 +       while (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_EMT)) {
 637 +               set_current_state(TASK_INTERRUPTIBLE);
 638 +               schedule_timeout(1);
 639 +               if (signal_pending(current))
 640 +                       break;
 641 +               if (timeout && time_after(jiffies, orig_jiffies + timeout))
 642 +                       break;
 643 +       }
 644 +       pr_debug("duart_wait_until_sent()-\n");
 645 +}
 646 +
 647 +/*
 648 + * duart_hangup() --- called by tty_hangup() when a hangup is signaled.
 649 + */
 650 +static void duart_hangup(struct tty_struct *tty)
 651 +{
 652 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 653 +
 654 +       duart_flush_buffer(tty);
 655 +       us->open = 0;
 656 +       us->tty = 0;
 657 +}
 658 +
 659 +/*
 660 + * Open a tty line.  Note that this can be called multiple times, so ->open can
 661 + * be >1.  Only set up the tty struct if this is a "new" open, e.g. ->open was
 662 + * zero
 663 + */
 664 +static int duart_open(struct tty_struct *tty, struct file *filp)
 665 +{
 666 +       uart_state_t *us;
 667 +       unsigned int line = tty->index;
 668 +       unsigned long flags;
 669 +
 670 +       if ((line >= tty->driver->num) || !sb1250_duart_present[line])
 671 +               return -ENODEV;
 672 +
 673 +       pr_debug("duart_open called by %i (%s), tty is %p, rw is %p, ww is %p\n",
 674 +              current->pid, current->comm, tty, tty->read_wait,
 675 +              tty->write_wait);
 676 +
 677 +       us = uart_states + line;
 678 +       tty->driver_data = us;
 679 +
 680 +       spin_lock_irqsave(&open_lock, flags);
 681 +       if (!us->open) {
 682 +               us->tty = tty;
 683 +               us->tty->termios->c_cflag = us->last_cflags;
 684 +       }
 685 +       us->open++;
 686 +       us->flags &= ~TX_INTEN;
 687 +       duart_unmask_ints(line, M_DUART_IMR_RX);
 688 +       spin_unlock_irqrestore(&open_lock, flags);
 689 +
 690 +       return 0;
 691 +}
 692 +
 693 +
 694 +/*
 695 + * Close a reference count out.  If reference count hits zero, null the
 696 + * tty, kill the interrupts.  The tty_io driver is responsible for making
 697 + * sure we've cleared out our internal buffers before calling close()
 698 + */
 699 +static void duart_close(struct tty_struct *tty, struct file *filp)
 700 +{
 701 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 702 +       unsigned long flags;
 703 +
 704 +       pr_debug("duart_close called by %i (%s)\n", current->pid, current->comm);
 705 +
 706 +       if (!us || !us->open)
 707 +               return;
 708 +
 709 +       spin_lock_irqsave(&open_lock, flags);
 710 +       if (tty_hung_up_p(filp)) {
 711 +               spin_unlock_irqrestore(&open_lock, flags);
 712 +               return;
 713 +       }
 714 +
 715 +       if (--us->open < 0) {
 716 +               us->open = 0;
 717 +               printk(KERN_ERR "duart: bad open count: %d\n", us->open);
 718 +       }
 719 +       if (us->open) {
 720 +               spin_unlock_irqrestore(&open_lock, flags);
 721 +               return;
 722 +       }
 723 +
 724 +       spin_unlock_irqrestore(&open_lock, flags);
 725 +
 726 +       tty->closing = 1;
 727 +
 728 +       /* Stop accepting input */
 729 +       duart_mask_ints(us->line, M_DUART_IMR_RX);
 730 +       /* Wait for FIFO to drain */
 731 +       while (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_EMT))
 732 +               ;
 733 +
 734 +       if (tty->driver->flush_buffer)
 735 +               tty->driver->flush_buffer(tty);
 736 +       if (tty->ldisc.flush_buffer)
 737 +               tty->ldisc.flush_buffer(tty);
 738 +       tty->closing = 0;
 739 +}
 740 +
 741 +
 742 +static struct tty_operations duart_ops = {
 743 +        .open   = duart_open,
 744 +        .close = duart_close,
 745 +        .write = duart_write,
 746 +        .put_char = duart_put_char,
 747 +        .flush_chars = duart_flush_chars,
 748 +        .write_room = duart_write_room,
 749 +        .chars_in_buffer = duart_chars_in_buffer,
 750 +        .flush_buffer = duart_flush_buffer,
 751 +        .ioctl = duart_ioctl,
 752 +//        .throttle = duart_throttle,
 753 +//        .unthrottle = duart_unthrottle,
 754 +        .set_termios = duart_set_termios,
 755 +        .stop = duart_stop,
 756 +        .start = duart_start,
 757 +        .hangup = duart_hangup,
 758 +       .wait_until_sent = duart_wait_until_sent,
 759 +};
 760 +
 761 +/* Initialize the sb1250_duart_present array based on SOC type.  */
 762 +static void __init sb1250_duart_init_present_lines(void)
 763 +{
 764 +       int i, max_lines;
 765 +
 766 +       /* Set the number of available units based on the SOC type.  */
 767 +       switch (soc_type) {
 768 +       case K_SYS_SOC_TYPE_BCM1x55:
 769 +       case K_SYS_SOC_TYPE_BCM1x80:
 770 +               max_lines = 4;
 771 +               break;
 772 +       default:
 773 +               /* Assume at least two serial ports at the normal address.  */
 774 +               max_lines = 2;
 775 +               break;
 776 +       }
 777 +       if (max_lines > DUART_MAX_LINE)
 778 +               max_lines = DUART_MAX_LINE;
 779 +
 780 +       for (i = 0; i < max_lines; i++)
 781 +               sb1250_duart_present[i] = 1;
 782 +}
 783 +
 784 +/* Set up the driver and register it, register the UART interrupts.  This
 785 +   is called from tty_init, or as a part of the module init */
 786 +static int __init sb1250_duart_init(void)
 787 +{
 788 +       int i;
 789 +
 790 +       sb1250_duart_init_present_lines();
 791 +
 792 +       sb1250_duart_driver = alloc_tty_driver(DUART_MAX_LINE);
 793 +       if (!sb1250_duart_driver)
 794 +               return -ENOMEM;
 795 +
 796 +       sb1250_duart_driver->owner = THIS_MODULE;
 797 +       sb1250_duart_driver->name = "duart";
 798 +       sb1250_duart_driver->devfs_name = "duart/";
 799 +       sb1250_duart_driver->major = TTY_MAJOR;
 800 +       sb1250_duart_driver->minor_start = SB1250_DUART_MINOR_BASE;
 801 +       sb1250_duart_driver->type            = TTY_DRIVER_TYPE_SERIAL;
 802 +       sb1250_duart_driver->subtype         = SERIAL_TYPE_NORMAL;
 803 +       sb1250_duart_driver->init_termios    = tty_std_termios;
 804 +       sb1250_duart_driver->flags           = TTY_DRIVER_REAL_RAW;
 805 +       tty_set_operations(sb1250_duart_driver, &duart_ops);
 806 +
 807 +       for (i=0; i<DUART_MAX_LINE; i++) {
 808 +               uart_state_t *port = uart_states + i;
 809 +
 810 +               if (!sb1250_duart_present[i])
 811 +                       continue;
 812 +
 813 +               init_duart_port(port, i);
 814 +               spin_lock_init(&port->outp_lock);
 815 +               duart_mask_ints(i, M_DUART_IMR_ALL);
 816 +               if (request_irq(UNIT_INT(i), duart_int, 0, "uart", port)) {
 817 +                       panic("Couldn't get uart0 interrupt line");
 818 +               }
 819 +               __raw_writeq(M_DUART_RX_EN|M_DUART_TX_EN,
 820 +                            IOADDR(UNIT_CHANREG(i, R_DUART_CMD)));
 821 +               duart_set_cflag(i, DEFAULT_CFLAGS);
 822 +       }
 823 +
 824 +       /* Interrupts are now active, our ISR can be called. */
 825 +
 826 +       if (tty_register_driver(sb1250_duart_driver)) {
 827 +               printk(KERN_ERR "Couldn't register sb1250 duart serial driver\n");
 828 +               put_tty_driver(sb1250_duart_driver);
 829 +               return 1;
 830 +       }
 831 +       return 0;
 832 +}
 833 +
 834 +/* Unload the driver.  Unregister stuff, get ready to go away */
 835 +static void __exit sb1250_duart_fini(void)
 836 +{
 837 +       unsigned long flags;
 838 +       int i;
 839 +
 840 +       local_irq_save(flags);
 841 +       tty_unregister_driver(sb1250_duart_driver);
 842 +       put_tty_driver(sb1250_duart_driver);
 843 +
 844 +       for (i=0; i<DUART_MAX_LINE; i++) {
 845 +               if (!sb1250_duart_present[i])
 846 +                       continue;
 847 +               free_irq(UNIT_INT(i), &uart_states[i]);
 848 +               disable_irq(UNIT_INT(i));
 849 +       }
 850 +       local_irq_restore(flags);
 851 +}
 852 +
 853 +module_init(sb1250_duart_init);
 854 +module_exit(sb1250_duart_fini);
 855 +MODULE_DESCRIPTION("SB1250 Duart serial driver");
 856 +MODULE_AUTHOR("Broadcom Corp.");
 857 +
 858 +#ifdef CONFIG_SIBYTE_SB1250_DUART_CONSOLE
 859 +
 860 +/*
 861 + * Serial console stuff.  Very basic, polling driver for doing serial
 862 + * console output.  The console_sem is held by the caller, so we
 863 + * shouldn't be interrupted for more console activity.
 864 + * XXXKW What about getting interrupted by uart driver activity?
 865 + */
 866 +
 867 +void serial_outc(unsigned char c, int line)
 868 +{
 869 +       uart_state_t *port = uart_states + line;
 870 +       while (!(READ_SERCSR(port->status, line) & M_DUART_TX_RDY)) ;
 871 +       WRITE_SERCSR(c, port->tx_hold, line);
 872 +       while (!(READ_SERCSR(port->status, port->line) & M_DUART_TX_EMT)) ;
 873 +}
 874 +
 875 +static void ser_console_write(struct console *cons, const char *s,
 876 +       unsigned int count)
 877 +{
 878 +       int line = cons->index;
 879 +       uart_state_t *port = uart_states + line;
 880 +       u32 imr;
 881 +
 882 +       imr = READ_SERCSR(port->imr, line);
 883 +       WRITE_SERCSR(0, port->imr, line);
 884 +       while (count--) {
 885 +               if (*s == '\n')
 886 +                       serial_outc('\r', line);
 887 +               serial_outc(*s++, line);
 888 +       }
 889 +       WRITE_SERCSR(imr, port->imr, line);
 890 +}
 891 +
 892 +static struct tty_driver *ser_console_device(struct console *c, int *index)
 893 +{
 894 +       *index = c->index;
 895 +       return sb1250_duart_driver;
 896 +}
 897 +
 898 +static int ser_console_setup(struct console *cons, char *str)
 899 +{
 900 +       int i;
 901 +
 902 +       sb1250_duart_init_present_lines();
 903 +
 904 +       for (i=0; i<DUART_MAX_LINE; i++) {
 905 +               uart_state_t *port = uart_states + i;
 906 +
 907 +               if (!sb1250_duart_present[i])
 908 +                       continue;
 909 +
 910 +               init_duart_port(port, i);
 911 +#if SIBYTE_1956_WAR
 912 +               last_mode1[i] = V_DUART_PARITY_MODE_NONE|V_DUART_BITS_PER_CHAR_8;
 913 +#endif
 914 +               WRITE_SERCSR(V_DUART_PARITY_MODE_NONE|V_DUART_BITS_PER_CHAR_8,
 915 +                            port->mode_1, i);
 916 +               WRITE_SERCSR(M_DUART_STOP_BIT_LEN_1,
 917 +                            port->mode_2, i);
 918 +               WRITE_SERCSR(V_DUART_BAUD_RATE(115200),
 919 +                            port->clk_sel, i);
 920 +               WRITE_SERCSR(M_DUART_RX_EN|M_DUART_TX_EN,
 921 +                            port->cmd, i);
 922 +       }
 923 +       return 0;
 924 +}
 925 +
 926 +static struct console sb1250_ser_cons = {
 927 +       .name           = "duart",
 928 +       .write          = ser_console_write,
 929 +       .device         = ser_console_device,
 930 +       .setup          = ser_console_setup,
 931 +       .flags          = CON_PRINTBUFFER,
 932 +       .index          = -1,
 933 +};
 934 +
 935 +static int __init sb1250_serial_console_init(void)
 936 +{
 937 +       register_console(&sb1250_ser_cons);
 938 +       return 0;
 939 +}
 940 +
 941 +console_initcall(sb1250_serial_console_init);
 942 +
 943 +#endif /* CONFIG_SIBYTE_SB1250_DUART_CONSOLE */
 944 diff -Nurb linux-2.6.16.7/include/linux/serial.h linux-2.6.16.7/include/linux/serial.h
 945 --- linux-2.6.16.7/include/linux/serial.h       2006-04-17 14:53:25.000000000 -0700
 946 +++ linux-2.6.16.7/include/linux/serial.h       2006-04-28 12:25:19.000000000 -0700
 947 @@ -76,7 +76,8 @@
 948  #define PORT_16654     11
 949  #define PORT_16850     12
 950  #define PORT_RSA       13      /* RSA-DV II/S card */
 951 -#define PORT_MAX       13
 952 +#define PORT_SB1250    14
 953 +#define PORT_MAX       14
 954
 955  #define SERIAL_IO_PORT 0
 956  #define SERIAL_IO_HUB6 1