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

   1 diff -Nur linux-2.6.17/drivers/char/Kconfig linux-2.6.17-owrt/drivers/char/Kconfig
   2 --- linux-2.6.17/drivers/char/Kconfig   2006-06-18 03:49:35.000000000 +0200
   3 +++ linux-2.6.17-owrt/drivers/char/Kconfig      2006-06-18 12:41:36.000000000 +0200
   4 @@ -340,6 +340,14 @@
   5           To compile this driver as a module, choose M here: the
   6           module will be called istallion.
   7
   8 +config SIBYTE_SB1250_DUART
   9 +       bool "Support for BCM1xxx onchip DUART"
  10 +       depends on MIPS && SIBYTE_SB1xxx_SOC=y
  11 +
  12 +config SIBYTE_SB1250_DUART_CONSOLE
  13 +       bool "Console on BCM1xxx DUART"
  14 +       depends on SIBYTE_SB1250_DUART
  15 +
  16  config AU1000_UART
  17         bool "Enable Au1000 UART Support"
  18         depends on SERIAL_NONSTANDARD && MIPS
  19 diff -Nur linux-2.6.17/drivers/char/Makefile linux-2.6.17-owrt/drivers/char/Makefile
  20 --- linux-2.6.17/drivers/char/Makefile  2006-06-18 03:49:35.000000000 +0200
  21 +++ linux-2.6.17-owrt/drivers/char/Makefile     2006-06-18 12:42:57.000000000 +0200
  22 @@ -31,6 +31,7 @@
  23  obj-$(CONFIG_A2232)            += ser_a2232.o generic_serial.o
  24  obj-$(CONFIG_ATARI_DSP56K)     += dsp56k.o
  25  obj-$(CONFIG_MOXA_SMARTIO)     += mxser.o
  26 +obj-$(CONFIG_SIBYTE_SB1250_DUART) += sb1250_duart.o
  27  obj-$(CONFIG_COMPUTONE)                += ip2/
  28  obj-$(CONFIG_RISCOM8)          += riscom8.o
  29  obj-$(CONFIG_ISI)              += isicom.o
  30 diff -Nur linux-2.6.17/drivers/char/sb1250_duart.c linux-2.6.17-owrt/drivers/char/sb1250_duart.c
  31 --- linux-2.6.17/drivers/char/sb1250_duart.c    1970-01-01 01:00:00.000000000 +0100
  32 +++ linux-2.6.17-owrt/drivers/char/sb1250_duart.c       2006-06-18 12:41:36.000000000 +0200
  33 @@ -0,0 +1,911 @@
  34 +/*
  35 + * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
  36 + *
  37 + * This program is free software; you can redistribute it and/or
  38 + * modify it under the terms of the GNU General Public License
  39 + * as published by the Free Software Foundation; either version 2
  40 + * of the License, or (at your option) any later version.
  41 + *
  42 + * This program is distributed in the hope that it will be useful,
  43 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  44 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  45 + * GNU General Public License for more details.
  46 + *
  47 + * You should have received a copy of the GNU General Public License
  48 + * along with this program; if not, write to the Free Software
  49 + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  50 + */
  51 +
  52 +/*
  53 + * Driver support for the on-chip sb1250 dual-channel serial port,
  54 + * running in asynchronous mode.  Also, support for doing a serial console
  55 + * on one of those ports
  56 + */
  57 +#include <linux/autoconf.h>
  58 +#include <linux/types.h>
  59 +#include <linux/kernel.h>
  60 +#include <linux/serial.h>
  61 +#include <linux/interrupt.h>
  62 +#include <linux/module.h>
  63 +#include <linux/console.h>
  64 +#include <linux/kdev_t.h>
  65 +#include <linux/major.h>
  66 +#include <linux/termios.h>
  67 +#include <linux/spinlock.h>
  68 +#include <linux/irq.h>
  69 +#include <linux/errno.h>
  70 +#include <linux/tty.h>
  71 +#include <linux/sched.h>
  72 +#include <linux/tty_flip.h>
  73 +#include <linux/timer.h>
  74 +#include <linux/init.h>
  75 +#include <linux/mm.h>
  76 +#include <asm/delay.h>
  77 +#include <asm/io.h>
  78 +#include <asm/uaccess.h>
  79 +#include <asm/sibyte/swarm.h>
  80 +#include <asm/sibyte/sb1250.h>
  81 +#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
  82 +#include <asm/sibyte/bcm1480_regs.h>
  83 +#include <asm/sibyte/bcm1480_int.h>
  84 +#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  85 +#include <asm/sibyte/sb1250_regs.h>
  86 +#include <asm/sibyte/sb1250_int.h>
  87 +#else
  88 +#error invalid SiByte UART configuation
  89 +#endif
  90 +#include <asm/sibyte/sb1250_uart.h>
  91 +#include <asm/war.h>
  92 +
  93 +#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
  94 +#define UNIT_CHANREG(n,reg)    A_BCM1480_DUART_CHANREG((n),(reg))
  95 +#define UNIT_IMRREG(n)         A_BCM1480_DUART_IMRREG(n)
  96 +#define UNIT_INT(n)            (K_BCM1480_INT_UART_0 + (n))
  97 +#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
  98 +#define UNIT_CHANREG(n,reg)    A_DUART_CHANREG((n),(reg))
  99 +#define UNIT_IMRREG(n)         A_DUART_IMRREG(n)
 100 +#define UNIT_INT(n)            (K_INT_UART_0 + (n))
 101 +#else
 102 +#error invalid SiByte UART configuation
 103 +#endif
 104 +
 105 +/* Toggle spewing of debugging output */
 106 +#undef DEBUG
 107 +
 108 +#define DEFAULT_CFLAGS          (CS8 | B115200)
 109 +
 110 +#define TX_INTEN          1
 111 +#define DUART_INITIALIZED 2
 112 +
 113 +#define DUART_MAX_LINE 4
 114 +char sb1250_duart_present[DUART_MAX_LINE];
 115 +EXPORT_SYMBOL(sb1250_duart_present);
 116 +
 117 +/*
 118 + * Still not sure what the termios structures set up here are for,
 119 + *  but we have to supply pointers to them to register the tty driver
 120 + */
 121 +static struct tty_driver *sb1250_duart_driver; //, sb1250_duart_callout_driver;
 122 +
 123 +/*
 124 + * This lock protects both the open flags for all the uart states as
 125 + * well as the reference count for the module
 126 + */
 127 +static DEFINE_SPINLOCK(open_lock);
 128 +
 129 +typedef struct {
 130 +       unsigned char       outp_buf[SERIAL_XMIT_SIZE];
 131 +       unsigned int        outp_head;
 132 +       unsigned int        outp_tail;
 133 +       unsigned int        outp_count;
 134 +       spinlock_t          outp_lock;
 135 +       unsigned int        open;
 136 +       unsigned int        line;
 137 +       unsigned int        last_cflags;
 138 +       unsigned long       flags;
 139 +       struct tty_struct   *tty;
 140 +       /* CSR addresses */
 141 +       volatile u32        *status;
 142 +       volatile u32        *imr;
 143 +       volatile u32        *tx_hold;
 144 +       volatile u32        *rx_hold;
 145 +       volatile u32        *mode_1;
 146 +       volatile u32        *mode_2;
 147 +       volatile u32        *clk_sel;
 148 +       volatile u32        *cmd;
 149 +} uart_state_t;
 150 +
 151 +static uart_state_t uart_states[DUART_MAX_LINE];
 152 +
 153 +/*
 154 + * Inline functions local to this module
 155 + */
 156 +
 157 +/*
 158 + * In bug 1956, we get glitches that can mess up uart registers.  This
 159 + * "write-mode-1 after any register access" is the accepted
 160 + * workaround.
 161 + */
 162 +#if SIBYTE_1956_WAR
 163 +static unsigned int last_mode1[DUART_MAX_LINE];
 164 +#endif
 165 +
 166 +static inline u32 READ_SERCSR(volatile u32 *addr, int line)
 167 +{
 168 +       u32 val = csr_in32(addr);
 169 +#if SIBYTE_1956_WAR
 170 +       csr_out32(last_mode1[line], uart_states[line].mode_1);
 171 +#endif
 172 +       return val;
 173 +}
 174 +
 175 +static inline void WRITE_SERCSR(u32 val, volatile u32 *addr, int line)
 176 +{
 177 +       csr_out32(val, addr);
 178 +#if SIBYTE_1956_WAR
 179 +       csr_out32(last_mode1[line], uart_states[line].mode_1);
 180 +#endif
 181 +}
 182 +
 183 +static void init_duart_port(uart_state_t *port, int line)
 184 +{
 185 +       if (!(port->flags & DUART_INITIALIZED)) {
 186 +               port->line = line;
 187 +               port->status = IOADDR(UNIT_CHANREG(line, R_DUART_STATUS));
 188 +               port->imr = IOADDR(UNIT_IMRREG(line));
 189 +               port->tx_hold = IOADDR(UNIT_CHANREG(line, R_DUART_TX_HOLD));
 190 +               port->rx_hold = IOADDR(UNIT_CHANREG(line, R_DUART_RX_HOLD));
 191 +               port->mode_1 = IOADDR(UNIT_CHANREG(line, R_DUART_MODE_REG_1));
 192 +               port->mode_2 = IOADDR(UNIT_CHANREG(line, R_DUART_MODE_REG_2));
 193 +               port->clk_sel = IOADDR(UNIT_CHANREG(line, R_DUART_CLK_SEL));
 194 +               port->cmd = IOADDR(UNIT_CHANREG(line, R_DUART_CMD));
 195 +               port->flags |= DUART_INITIALIZED;
 196 +       }
 197 +}
 198 +
 199 +/*
 200 + * Mask out the passed interrupt lines at the duart level.  This should be
 201 + * called while holding the associated outp_lock.
 202 + */
 203 +static inline void duart_mask_ints(unsigned int line, unsigned int mask)
 204 +{
 205 +       uart_state_t *port = uart_states + line;
 206 +       u64 tmp = READ_SERCSR(port->imr, line);
 207 +       WRITE_SERCSR(tmp & ~mask, port->imr, line);
 208 +}
 209 +
 210 +
 211 +/* Unmask the passed interrupt lines at the duart level */
 212 +static inline void duart_unmask_ints(unsigned int line, unsigned int mask)
 213 +{
 214 +       uart_state_t *port = uart_states + line;
 215 +       u64 tmp = READ_SERCSR(port->imr, line);
 216 +       WRITE_SERCSR(tmp | mask, port->imr, line);
 217 +}
 218 +
 219 +static inline void transmit_char_pio(uart_state_t *us)
 220 +{
 221 +       struct tty_struct *tty = us->tty;
 222 +       int blocked = 0;
 223 +
 224 +       if (spin_trylock(&us->outp_lock)) {
 225 +               for (;;) {
 226 +                       if (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_RDY))
 227 +                               break;
 228 +                       if (us->outp_count <= 0 || tty->stopped || tty->hw_stopped) {
 229 +                               break;
 230 +                       } else {
 231 +                               WRITE_SERCSR(us->outp_buf[us->outp_head],
 232 +                                            us->tx_hold, us->line);
 233 +                               us->outp_head = (us->outp_head + 1) & (SERIAL_XMIT_SIZE-1);
 234 +                               if (--us->outp_count <= 0)
 235 +                                       break;
 236 +                       }
 237 +                       udelay(10);
 238 +               }
 239 +               spin_unlock(&us->outp_lock);
 240 +       } else {
 241 +               blocked = 1;
 242 +       }
 243 +
 244 +       if (!us->outp_count || tty->stopped ||
 245 +           tty->hw_stopped || blocked) {
 246 +               us->flags &= ~TX_INTEN;
 247 +               duart_mask_ints(us->line, M_DUART_IMR_TX);
 248 +       }
 249 +
 250 +       if (us->open &&
 251 +           (us->outp_count < (SERIAL_XMIT_SIZE/2))) {
 252 +               /*
 253 +                * We told the discipline at one point that we had no
 254 +                * space, so it went to sleep.  Wake it up when we hit
 255 +                * half empty
 256 +                */
 257 +               if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
 258 +                   tty->ldisc.write_wakeup)
 259 +                       tty->ldisc.write_wakeup(tty);
 260 +               wake_up_interruptible(&tty->write_wait);
 261 +       }
 262 +}
 263 +
 264 +/*
 265 + * Generic interrupt handler for both channels.  dev_id is a pointer
 266 + * to the proper uart_states structure, so from that we can derive
 267 + * which port interrupted
 268 + */
 269 +
 270 +static irqreturn_t duart_int(int irq, void *dev_id)
 271 +{
 272 +       uart_state_t *us = (uart_state_t *)dev_id;
 273 +       struct tty_struct *tty = us->tty;
 274 +       unsigned int status = READ_SERCSR(us->status, us->line);
 275 +
 276 +       pr_debug("DUART INT\n");
 277 +
 278 +       if (status & M_DUART_RX_RDY) {
 279 +               int counter = 2048;
 280 +               unsigned int ch;
 281 +
 282 +               if (status & M_DUART_OVRUN_ERR)
 283 +                       tty_insert_flip_char(tty, 0, TTY_OVERRUN);
 284 +               if (status & M_DUART_PARITY_ERR) {
 285 +                       printk("Parity error!\n");
 286 +               } else if (status & M_DUART_FRM_ERR) {
 287 +                       printk("Frame error!\n");
 288 +               }
 289 +
 290 +               while (counter > 0) {
 291 +                       if (!(READ_SERCSR(us->status, us->line) & M_DUART_RX_RDY))
 292 +                               break;
 293 +                       ch = READ_SERCSR(us->rx_hold, us->line);
 294 +                       tty_insert_flip_char(tty, ch, 0);
 295 +                       udelay(1);
 296 +                       counter--;
 297 +               }
 298 +               tty_flip_buffer_push(tty);
 299 +       }
 300 +
 301 +       if (status & M_DUART_TX_RDY) {
 302 +               transmit_char_pio(us);
 303 +       }
 304 +
 305 +       return IRQ_HANDLED;
 306 +}
 307 +
 308 +/*
 309 + *  Actual driver functions
 310 + */
 311 +
 312 +/* Return the number of characters we can accomodate in a write at this instant */
 313 +static int duart_write_room(struct tty_struct *tty)
 314 +{
 315 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 316 +       int retval;
 317 +
 318 +       retval = SERIAL_XMIT_SIZE - us->outp_count;
 319 +
 320 +       pr_debug("duart_write_room called, returning %i\n", retval);
 321 +
 322 +       return retval;
 323 +}
 324 +
 325 +/* memcpy the data from src to destination, but take extra care if the
 326 +   data is coming from user space */
 327 +static inline int copy_buf(char *dest, const char *src, int size, int from_user)
 328 +{
 329 +       if (from_user) {
 330 +               (void) copy_from_user(dest, src, size);
 331 +       } else {
 332 +               memcpy(dest, src, size);
 333 +       }
 334 +       return size;
 335 +}
 336 +
 337 +/*
 338 + * Buffer up to count characters from buf to be written.  If we don't have
 339 + * other characters buffered, enable the tx interrupt to start sending
 340 + */
 341 +static int duart_write(struct tty_struct *tty, const unsigned char *buf,
 342 +                      int count)
 343 +{
 344 +       uart_state_t *us;
 345 +       int c, t, total = 0;
 346 +       unsigned long flags;
 347 +
 348 +       if (!tty) return 0;
 349 +
 350 +       us = tty->driver_data;
 351 +       if (!us) return 0;
 352 +
 353 +       pr_debug("duart_write called for %i chars by %i (%s)\n", count, current->pid, current->comm);
 354 +
 355 +       spin_lock_irqsave(&us->outp_lock, flags);
 356 +
 357 +       for (;;) {
 358 +               c = count;
 359 +
 360 +               t = SERIAL_XMIT_SIZE - us->outp_tail;
 361 +               if (t < c) c = t;
 362 +
 363 +               t = SERIAL_XMIT_SIZE - 1 - us->outp_count;
 364 +               if (t < c) c = t;
 365 +
 366 +               if (c <= 0) break;
 367 +
 368 +               memcpy(us->outp_buf + us->outp_tail, buf, c);
 369 +
 370 +               us->outp_count += c;
 371 +               us->outp_tail = (us->outp_tail + c) & (SERIAL_XMIT_SIZE - 1);
 372 +               buf += c;
 373 +               count -= c;
 374 +               total += c;
 375 +       }
 376 +
 377 +       spin_unlock_irqrestore(&us->outp_lock, flags);
 378 +
 379 +       if (us->outp_count && !tty->stopped &&
 380 +           !tty->hw_stopped && !(us->flags & TX_INTEN)) {
 381 +               us->flags |= TX_INTEN;
 382 +               duart_unmask_ints(us->line, M_DUART_IMR_TX);
 383 +       }
 384 +
 385 +       return total;
 386 +}
 387 +
 388 +
 389 +/* Buffer one character to be written.  If there's not room for it, just drop
 390 +   it on the floor.  This is used for echo, among other things */
 391 +static void duart_put_char(struct tty_struct *tty, u_char ch)
 392 +{
 393 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 394 +       unsigned long flags;
 395 +
 396 +       pr_debug("duart_put_char called.  Char is %x (%c)\n", (int)ch, ch);
 397 +
 398 +       spin_lock_irqsave(&us->outp_lock, flags);
 399 +
 400 +       if (us->outp_count == SERIAL_XMIT_SIZE) {
 401 +               spin_unlock_irqrestore(&us->outp_lock, flags);
 402 +               return;
 403 +       }
 404 +
 405 +       us->outp_buf[us->outp_tail] = ch;
 406 +       us->outp_tail = (us->outp_tail + 1) &(SERIAL_XMIT_SIZE-1);
 407 +       us->outp_count++;
 408 +
 409 +       spin_unlock_irqrestore(&us->outp_lock, flags);
 410 +}
 411 +
 412 +static void duart_flush_chars(struct tty_struct * tty)
 413 +{
 414 +       uart_state_t *port;
 415 +
 416 +       if (!tty) return;
 417 +
 418 +       port = tty->driver_data;
 419 +
 420 +       if (!port) return;
 421 +
 422 +       if (port->outp_count <= 0 || tty->stopped || tty->hw_stopped) {
 423 +               return;
 424 +       }
 425 +
 426 +       port->flags |= TX_INTEN;
 427 +       duart_unmask_ints(port->line, M_DUART_IMR_TX);
 428 +}
 429 +
 430 +/* Return the number of characters in the output buffer that have yet to be
 431 +   written */
 432 +static int duart_chars_in_buffer(struct tty_struct *tty)
 433 +{
 434 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 435 +       int retval;
 436 +
 437 +       retval = us->outp_count;
 438 +
 439 +       pr_debug("duart_chars_in_buffer returning %i\n", retval);
 440 +
 441 +       return retval;
 442 +}
 443 +
 444 +/* Kill everything we haven't yet shoved into the FIFO.  Turn off the
 445 +   transmit interrupt since we've nothing more to transmit */
 446 +static void duart_flush_buffer(struct tty_struct *tty)
 447 +{
 448 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 449 +       unsigned long flags;
 450 +
 451 +       pr_debug("duart_flush_buffer called\n");
 452 +       spin_lock_irqsave(&us->outp_lock, flags);
 453 +       us->outp_head = us->outp_tail = us->outp_count = 0;
 454 +       spin_unlock_irqrestore(&us->outp_lock, flags);
 455 +
 456 +       wake_up_interruptible(&us->tty->write_wait);
 457 +       if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
 458 +           tty->ldisc.write_wakeup)
 459 +               tty->ldisc.write_wakeup(tty);
 460 +}
 461 +
 462 +
 463 +/* See sb1250 user manual for details on these registers */
 464 +static inline void duart_set_cflag(unsigned int line, unsigned int cflag)
 465 +{
 466 +       unsigned int mode_reg1 = 0, mode_reg2 = 0;
 467 +       unsigned int clk_divisor;
 468 +       uart_state_t *port = uart_states + line;
 469 +
 470 +       switch (cflag & CSIZE) {
 471 +       case CS7:
 472 +               mode_reg1 |= V_DUART_BITS_PER_CHAR_7;
 473 +
 474 +       default:
 475 +               /* We don't handle CS5 or CS6...is there a way we're supposed to flag this?
 476 +                  right now we just force them to CS8 */
 477 +               mode_reg1 |= 0x0;
 478 +               break;
 479 +       }
 480 +       if (cflag & CSTOPB) {
 481 +               mode_reg2 |= M_DUART_STOP_BIT_LEN_2;
 482 +       }
 483 +       if (!(cflag & PARENB)) {
 484 +               mode_reg1 |= V_DUART_PARITY_MODE_NONE;
 485 +       }
 486 +       if (cflag & PARODD) {
 487 +               mode_reg1 |= M_DUART_PARITY_TYPE_ODD;
 488 +       }
 489 +
 490 +       /* Formula for this is (5000000/baud)-1, but we saturate
 491 +          at 12 bits, which means we can't actually do anything less
 492 +          that 1200 baud */
 493 +       switch (cflag & CBAUD) {
 494 +       case B200:
 495 +       case B300:
 496 +       case B1200:     clk_divisor = 4095;             break;
 497 +       case B1800:     clk_divisor = 2776;             break;
 498 +       case B2400:     clk_divisor = 2082;             break;
 499 +       case B4800:     clk_divisor = 1040;             break;
 500 +       default:
 501 +       case B9600:     clk_divisor = 519;              break;
 502 +       case B19200:    clk_divisor = 259;              break;
 503 +       case B38400:    clk_divisor = 129;              break;
 504 +       case B57600:    clk_divisor = 85;               break;
 505 +       case B115200:   clk_divisor = 42;               break;
 506 +       }
 507 +       WRITE_SERCSR(mode_reg1, port->mode_1, port->line);
 508 +       WRITE_SERCSR(mode_reg2, port->mode_2, port->line);
 509 +       WRITE_SERCSR(clk_divisor, port->clk_sel, port->line);
 510 +       port->last_cflags = cflag;
 511 +}
 512 +
 513 +
 514 +/* Handle notification of a termios change.  */
 515 +static void duart_set_termios(struct tty_struct *tty, struct termios *old)
 516 +{
 517 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 518 +
 519 +       pr_debug("duart_set_termios called by %i (%s)\n", current->pid, current->comm);
 520 +       if (old && tty->termios->c_cflag == old->c_cflag)
 521 +               return;
 522 +       duart_set_cflag(us->line, tty->termios->c_cflag);
 523 +}
 524 +
 525 +static int get_serial_info(uart_state_t *us, struct serial_struct * retinfo) {
 526 +
 527 +       struct serial_struct tmp;
 528 +
 529 +       memset(&tmp, 0, sizeof(tmp));
 530 +
 531 +       tmp.type=PORT_SB1250;
 532 +       tmp.line=us->line;
 533 +       tmp.port=UNIT_CHANREG(tmp.line,0);
 534 +       tmp.irq=UNIT_INT(tmp.line);
 535 +       tmp.xmit_fifo_size=16; /* fixed by hw */
 536 +       tmp.baud_base=5000000;
 537 +       tmp.io_type=SERIAL_IO_MEM;
 538 +
 539 +       if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
 540 +               return -EFAULT;
 541 +
 542 +       return 0;
 543 +}
 544 +
 545 +static int duart_ioctl(struct tty_struct *tty, struct file * file,
 546 +                      unsigned int cmd, unsigned long arg)
 547 +{
 548 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 549 +
 550 +/*     if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
 551 +       return -ENODEV;*/
 552 +       switch (cmd) {
 553 +       case TIOCMGET:
 554 +               printk("Ignoring TIOCMGET\n");
 555 +               break;
 556 +       case TIOCMBIS:
 557 +               printk("Ignoring TIOCMBIS\n");
 558 +               break;
 559 +       case TIOCMBIC:
 560 +               printk("Ignoring TIOCMBIC\n");
 561 +               break;
 562 +       case TIOCMSET:
 563 +               printk("Ignoring TIOCMSET\n");
 564 +               break;
 565 +       case TIOCGSERIAL:
 566 +               return get_serial_info(us,(struct serial_struct *) arg);
 567 +       case TIOCSSERIAL:
 568 +               printk("Ignoring TIOCSSERIAL\n");
 569 +               break;
 570 +       case TIOCSERCONFIG:
 571 +               printk("Ignoring TIOCSERCONFIG\n");
 572 +               break;
 573 +       case TIOCSERGETLSR: /* Get line status register */
 574 +               printk("Ignoring TIOCSERGETLSR\n");
 575 +               break;
 576 +       case TIOCSERGSTRUCT:
 577 +               printk("Ignoring TIOCSERGSTRUCT\n");
 578 +               break;
 579 +       case TIOCMIWAIT:
 580 +               printk("Ignoring TIOCMIWAIT\n");
 581 +               break;
 582 +       case TIOCGICOUNT:
 583 +               printk("Ignoring TIOCGICOUNT\n");
 584 +               break;
 585 +       case TIOCSERGWILD:
 586 +               printk("Ignoring TIOCSERGWILD\n");
 587 +               break;
 588 +       case TIOCSERSWILD:
 589 +               printk("Ignoring TIOCSERSWILD\n");
 590 +               break;
 591 +       default:
 592 +               break;
 593 +       }
 594 +//     printk("Ignoring IOCTL %x from pid %i (%s)\n", cmd, current->pid, current->comm);
 595 +       return -ENOIOCTLCMD;
 596 +}
 597 +
 598 +/* XXXKW locking? */
 599 +static void duart_start(struct tty_struct *tty)
 600 +{
 601 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 602 +
 603 +       pr_debug("duart_start called\n");
 604 +
 605 +       if (us->outp_count && !(us->flags & TX_INTEN)) {
 606 +               us->flags |= TX_INTEN;
 607 +               duart_unmask_ints(us->line, M_DUART_IMR_TX);
 608 +       }
 609 +}
 610 +
 611 +/* XXXKW locking? */
 612 +static void duart_stop(struct tty_struct *tty)
 613 +{
 614 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 615 +
 616 +       pr_debug("duart_stop called\n");
 617 +
 618 +       if (us->outp_count && (us->flags & TX_INTEN)) {
 619 +               us->flags &= ~TX_INTEN;
 620 +               duart_mask_ints(us->line, M_DUART_IMR_TX);
 621 +       }
 622 +}
 623 +
 624 +/* Not sure on the semantics of this; are we supposed to wait until the stuff
 625 +   already in the hardware FIFO drains, or are we supposed to wait until
 626 +   we've drained the output buffer, too?  I'm assuming the former, 'cause thats
 627 +   what the other drivers seem to assume
 628 +*/
 629 +
 630 +static void duart_wait_until_sent(struct tty_struct *tty, int timeout)
 631 +{
 632 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 633 +       unsigned long orig_jiffies;
 634 +
 635 +       orig_jiffies = jiffies;
 636 +       pr_debug("duart_wait_until_sent(%d)+\n", timeout);
 637 +       while (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_EMT)) {
 638 +               set_current_state(TASK_INTERRUPTIBLE);
 639 +               schedule_timeout(1);
 640 +               if (signal_pending(current))
 641 +                       break;
 642 +               if (timeout && time_after(jiffies, orig_jiffies + timeout))
 643 +                       break;
 644 +       }
 645 +       pr_debug("duart_wait_until_sent()-\n");
 646 +}
 647 +
 648 +/*
 649 + * duart_hangup() --- called by tty_hangup() when a hangup is signaled.
 650 + */
 651 +static void duart_hangup(struct tty_struct *tty)
 652 +{
 653 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 654 +
 655 +       duart_flush_buffer(tty);
 656 +       us->open = 0;
 657 +       us->tty = 0;
 658 +}
 659 +
 660 +/*
 661 + * Open a tty line.  Note that this can be called multiple times, so ->open can
 662 + * be >1.  Only set up the tty struct if this is a "new" open, e.g. ->open was
 663 + * zero
 664 + */
 665 +static int duart_open(struct tty_struct *tty, struct file *filp)
 666 +{
 667 +       uart_state_t *us;
 668 +       unsigned int line = tty->index;
 669 +       unsigned long flags;
 670 +
 671 +       if ((line >= tty->driver->num) || !sb1250_duart_present[line])
 672 +               return -ENODEV;
 673 +
 674 +       pr_debug("duart_open called by %i (%s), tty is %p, rw is %p, ww is %p\n",
 675 +              current->pid, current->comm, tty, tty->read_wait,
 676 +              tty->write_wait);
 677 +
 678 +       us = uart_states + line;
 679 +       tty->driver_data = us;
 680 +
 681 +       spin_lock_irqsave(&open_lock, flags);
 682 +       if (!us->open) {
 683 +               us->tty = tty;
 684 +               us->tty->termios->c_cflag = us->last_cflags;
 685 +       }
 686 +       us->open++;
 687 +       us->flags &= ~TX_INTEN;
 688 +       duart_unmask_ints(line, M_DUART_IMR_RX);
 689 +       spin_unlock_irqrestore(&open_lock, flags);
 690 +
 691 +       return 0;
 692 +}
 693 +
 694 +
 695 +/*
 696 + * Close a reference count out.  If reference count hits zero, null the
 697 + * tty, kill the interrupts.  The tty_io driver is responsible for making
 698 + * sure we've cleared out our internal buffers before calling close()
 699 + */
 700 +static void duart_close(struct tty_struct *tty, struct file *filp)
 701 +{
 702 +       uart_state_t *us = (uart_state_t *) tty->driver_data;
 703 +       unsigned long flags;
 704 +
 705 +       pr_debug("duart_close called by %i (%s)\n", current->pid, current->comm);
 706 +
 707 +       if (!us || !us->open)
 708 +               return;
 709 +
 710 +       spin_lock_irqsave(&open_lock, flags);
 711 +       if (tty_hung_up_p(filp)) {
 712 +               spin_unlock_irqrestore(&open_lock, flags);
 713 +               return;
 714 +       }
 715 +
 716 +       if (--us->open < 0) {
 717 +               us->open = 0;
 718 +               printk(KERN_ERR "duart: bad open count: %d\n", us->open);
 719 +       }
 720 +       if (us->open) {
 721 +               spin_unlock_irqrestore(&open_lock, flags);
 722 +               return;
 723 +       }
 724 +
 725 +       spin_unlock_irqrestore(&open_lock, flags);
 726 +
 727 +       tty->closing = 1;
 728 +
 729 +       /* Stop accepting input */
 730 +       duart_mask_ints(us->line, M_DUART_IMR_RX);
 731 +       /* Wait for FIFO to drain */
 732 +       while (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_EMT))
 733 +               ;
 734 +
 735 +       if (tty->driver->flush_buffer)
 736 +               tty->driver->flush_buffer(tty);
 737 +       if (tty->ldisc.flush_buffer)
 738 +               tty->ldisc.flush_buffer(tty);
 739 +       tty->closing = 0;
 740 +}
 741 +
 742 +
 743 +static struct tty_operations duart_ops = {
 744 +        .open   = duart_open,
 745 +        .close = duart_close,
 746 +        .write = duart_write,
 747 +        .put_char = duart_put_char,
 748 +        .flush_chars = duart_flush_chars,
 749 +        .write_room = duart_write_room,
 750 +        .chars_in_buffer = duart_chars_in_buffer,
 751 +        .flush_buffer = duart_flush_buffer,
 752 +        .ioctl = duart_ioctl,
 753 +//        .throttle = duart_throttle,
 754 +//        .unthrottle = duart_unthrottle,
 755 +        .set_termios = duart_set_termios,
 756 +        .stop = duart_stop,
 757 +        .start = duart_start,
 758 +        .hangup = duart_hangup,
 759 +       .wait_until_sent = duart_wait_until_sent,
 760 +};
 761 +
 762 +/* Initialize the sb1250_duart_present array based on SOC type.  */
 763 +static void __init sb1250_duart_init_present_lines(void)
 764 +{
 765 +       int i, max_lines;
 766 +
 767 +       /* Set the number of available units based on the SOC type.  */
 768 +       switch (soc_type) {
 769 +       case K_SYS_SOC_TYPE_BCM1x55:
 770 +       case K_SYS_SOC_TYPE_BCM1x80:
 771 +               max_lines = 4;
 772 +               break;
 773 +       default:
 774 +               /* Assume at least two serial ports at the normal address.  */
 775 +               max_lines = 2;
 776 +               break;
 777 +       }
 778 +       if (max_lines > DUART_MAX_LINE)
 779 +               max_lines = DUART_MAX_LINE;
 780 +
 781 +       for (i = 0; i < max_lines; i++)
 782 +               sb1250_duart_present[i] = 1;
 783 +}
 784 +
 785 +/* Set up the driver and register it, register the UART interrupts.  This
 786 +   is called from tty_init, or as a part of the module init */
 787 +static int __init sb1250_duart_init(void)
 788 +{
 789 +       int i;
 790 +
 791 +       sb1250_duart_init_present_lines();
 792 +
 793 +       sb1250_duart_driver = alloc_tty_driver(DUART_MAX_LINE);
 794 +       if (!sb1250_duart_driver)
 795 +               return -ENOMEM;
 796 +
 797 +       sb1250_duart_driver->owner = THIS_MODULE;
 798 +       sb1250_duart_driver->name = "duart";
 799 +       sb1250_duart_driver->devfs_name = "duart/";
 800 +       sb1250_duart_driver->major = TTY_MAJOR;
 801 +       sb1250_duart_driver->minor_start = SB1250_DUART_MINOR_BASE;
 802 +       sb1250_duart_driver->type            = TTY_DRIVER_TYPE_SERIAL;
 803 +       sb1250_duart_driver->subtype         = SERIAL_TYPE_NORMAL;
 804 +       sb1250_duart_driver->init_termios    = tty_std_termios;
 805 +       sb1250_duart_driver->flags           = TTY_DRIVER_REAL_RAW;
 806 +       tty_set_operations(sb1250_duart_driver, &duart_ops);
 807 +
 808 +       for (i=0; i<DUART_MAX_LINE; i++) {
 809 +               uart_state_t *port = uart_states + i;
 810 +
 811 +               if (!sb1250_duart_present[i])
 812 +                       continue;
 813 +
 814 +               init_duart_port(port, i);
 815 +               spin_lock_init(&port->outp_lock);
 816 +               duart_mask_ints(i, M_DUART_IMR_ALL);
 817 +               if (request_irq(UNIT_INT(i), duart_int, 0, "uart", port)) {
 818 +                       panic("Couldn't get uart0 interrupt line");
 819 +               }
 820 +               __raw_writeq(M_DUART_RX_EN|M_DUART_TX_EN,
 821 +                            IOADDR(UNIT_CHANREG(i, R_DUART_CMD)));
 822 +               duart_set_cflag(i, DEFAULT_CFLAGS);
 823 +       }
 824 +
 825 +       /* Interrupts are now active, our ISR can be called. */
 826 +
 827 +       if (tty_register_driver(sb1250_duart_driver)) {
 828 +               printk(KERN_ERR "Couldn't register sb1250 duart serial driver\n");
 829 +               put_tty_driver(sb1250_duart_driver);
 830 +               return 1;
 831 +       }
 832 +       return 0;
 833 +}
 834 +
 835 +/* Unload the driver.  Unregister stuff, get ready to go away */
 836 +static void __exit sb1250_duart_fini(void)
 837 +{
 838 +       unsigned long flags;
 839 +       int i;
 840 +
 841 +       local_irq_save(flags);
 842 +       tty_unregister_driver(sb1250_duart_driver);
 843 +       put_tty_driver(sb1250_duart_driver);
 844 +
 845 +       for (i=0; i<DUART_MAX_LINE; i++) {
 846 +               if (!sb1250_duart_present[i])
 847 +                       continue;
 848 +               free_irq(UNIT_INT(i), &uart_states[i]);
 849 +               disable_irq(UNIT_INT(i));
 850 +       }
 851 +       local_irq_restore(flags);
 852 +}
 853 +
 854 +module_init(sb1250_duart_init);
 855 +module_exit(sb1250_duart_fini);
 856 +MODULE_DESCRIPTION("SB1250 Duart serial driver");
 857 +MODULE_AUTHOR("Broadcom Corp.");
 858 +
 859 +#ifdef CONFIG_SIBYTE_SB1250_DUART_CONSOLE
 860 +
 861 +/*
 862 + * Serial console stuff.  Very basic, polling driver for doing serial
 863 + * console output.  The console_sem is held by the caller, so we
 864 + * shouldn't be interrupted for more console activity.
 865 + * XXXKW What about getting interrupted by uart driver activity?
 866 + */
 867 +
 868 +void serial_outc(unsigned char c, int line)
 869 +{
 870 +       uart_state_t *port = uart_states + line;
 871 +       while (!(READ_SERCSR(port->status, line) & M_DUART_TX_RDY)) ;
 872 +       WRITE_SERCSR(c, port->tx_hold, line);
 873 +       while (!(READ_SERCSR(port->status, port->line) & M_DUART_TX_EMT)) ;
 874 +}
 875 +
 876 +static void ser_console_write(struct console *cons, const char *s,
 877 +       unsigned int count)
 878 +{
 879 +       int line = cons->index;
 880 +       uart_state_t *port = uart_states + line;
 881 +       u32 imr;
 882 +
 883 +       imr = READ_SERCSR(port->imr, line);
 884 +       WRITE_SERCSR(0, port->imr, line);
 885 +       while (count--) {
 886 +               if (*s == '\n')
 887 +                       serial_outc('\r', line);
 888 +               serial_outc(*s++, line);
 889 +       }
 890 +       WRITE_SERCSR(imr, port->imr, line);
 891 +}
 892 +
 893 +static struct tty_driver *ser_console_device(struct console *c, int *index)
 894 +{
 895 +       *index = c->index;
 896 +       return sb1250_duart_driver;
 897 +}
 898 +
 899 +static int ser_console_setup(struct console *cons, char *str)
 900 +{
 901 +       int i;
 902 +
 903 +       sb1250_duart_init_present_lines();
 904 +
 905 +       for (i=0; i<DUART_MAX_LINE; i++) {
 906 +               uart_state_t *port = uart_states + i;
 907 +
 908 +               if (!sb1250_duart_present[i])
 909 +                       continue;
 910 +
 911 +               init_duart_port(port, i);
 912 +#if SIBYTE_1956_WAR
 913 +               last_mode1[i] = V_DUART_PARITY_MODE_NONE|V_DUART_BITS_PER_CHAR_8;
 914 +#endif
 915 +               WRITE_SERCSR(V_DUART_PARITY_MODE_NONE|V_DUART_BITS_PER_CHAR_8,
 916 +                            port->mode_1, i);
 917 +               WRITE_SERCSR(M_DUART_STOP_BIT_LEN_1,
 918 +                            port->mode_2, i);
 919 +               WRITE_SERCSR(V_DUART_BAUD_RATE(115200),
 920 +                            port->clk_sel, i);
 921 +               WRITE_SERCSR(M_DUART_RX_EN|M_DUART_TX_EN,
 922 +                            port->cmd, i);
 923 +       }
 924 +       return 0;
 925 +}
 926 +
 927 +static struct console sb1250_ser_cons = {
 928 +       .name           = "duart",
 929 +       .write          = ser_console_write,
 930 +       .device         = ser_console_device,
 931 +       .setup          = ser_console_setup,
 932 +       .flags          = CON_PRINTBUFFER,
 933 +       .index          = -1,
 934 +};
 935 +
 936 +static int __init sb1250_serial_console_init(void)
 937 +{
 938 +       register_console(&sb1250_ser_cons);
 939 +       return 0;
 940 +}
 941 +
 942 +console_initcall(sb1250_serial_console_init);
 943 +
 944 +#endif /* CONFIG_SIBYTE_SB1250_DUART_CONSOLE */
 945 diff -Nur linux-2.6.17/include/linux/serial.h linux-2.6.17-owrt/include/linux/serial.h
 946 --- linux-2.6.17/include/linux/serial.h 2006-06-18 03:49:35.000000000 +0200
 947 +++ linux-2.6.17-owrt/include/linux/serial.h    2006-06-18 12:41:36.000000000 +0200
 948 @@ -76,7 +76,8 @@
 949  #define PORT_16654     11
 950  #define PORT_16850     12
 951  #define PORT_RSA       13      /* RSA-DV II/S card */
 952 -#define PORT_MAX       13
 953 +#define PORT_SB1250    14
 954 +#define PORT_MAX       14
 955
 956  #define SERIAL_IO_PORT 0
 957  #define SERIAL_IO_HUB6 1