Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * specialix.c -- specialix IO8+ multiport serial driver. |
| 3 | * |
| 4 | * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl) |
| 5 | * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) |
| 6 | * |
| 7 | * Specialix pays for the development and support of this driver. |
| 8 | * Please DO contact io8-linux@specialix.co.uk if you require |
| 9 | * support. But please read the documentation (specialix.txt) |
| 10 | * first. |
| 11 | * |
| 12 | * This driver was developped in the BitWizard linux device |
| 13 | * driver service. If you require a linux device driver for your |
| 14 | * product, please contact devices@BitWizard.nl for a quote. |
| 15 | * |
| 16 | * This code is firmly based on the riscom/8 serial driver, |
| 17 | * written by Dmitry Gorodchanin. The specialix IO8+ card |
| 18 | * programming information was obtained from the CL-CD1865 Data |
| 19 | * Book, and Specialix document number 6200059: IO8+ Hardware |
| 20 | * Functional Specification. |
| 21 | * |
| 22 | * This program is free software; you can redistribute it and/or |
| 23 | * modify it under the terms of the GNU General Public License as |
| 24 | * published by the Free Software Foundation; either version 2 of |
| 25 | * the License, or (at your option) any later version. |
| 26 | * |
| 27 | * This program is distributed in the hope that it will be |
| 28 | * useful, but WITHOUT ANY WARRANTY; without even the implied |
| 29 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 30 | * PURPOSE. See the GNU General Public License for more details. |
| 31 | * |
| 32 | * You should have received a copy of the GNU General Public |
| 33 | * License along with this program; if not, write to the Free |
| 34 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, |
| 35 | * USA. |
| 36 | * |
| 37 | * Revision history: |
| 38 | * |
| 39 | * Revision 1.0: April 1st 1997. |
| 40 | * Initial release for alpha testing. |
| 41 | * Revision 1.1: April 14th 1997. |
| 42 | * Incorporated Richard Hudsons suggestions, |
| 43 | * removed some debugging printk's. |
| 44 | * Revision 1.2: April 15th 1997. |
| 45 | * Ported to 2.1.x kernels. |
| 46 | * Revision 1.3: April 17th 1997 |
| 47 | * Backported to 2.0. (Compatibility macros). |
| 48 | * Revision 1.4: April 18th 1997 |
| 49 | * Fixed DTR/RTS bug that caused the card to indicate |
| 50 | * "don't send data" to a modem after the password prompt. |
| 51 | * Fixed bug for premature (fake) interrupts. |
| 52 | * Revision 1.5: April 19th 1997 |
| 53 | * fixed a minor typo in the header file, cleanup a little. |
| 54 | * performance warnings are now MAXed at once per minute. |
| 55 | * Revision 1.6: May 23 1997 |
| 56 | * Changed the specialix=... format to include interrupt. |
| 57 | * Revision 1.7: May 27 1997 |
| 58 | * Made many more debug printk's a compile time option. |
| 59 | * Revision 1.8: Jul 1 1997 |
| 60 | * port to linux-2.1.43 kernel. |
| 61 | * Revision 1.9: Oct 9 1998 |
| 62 | * Added stuff for the IO8+/PCI version. |
| 63 | * Revision 1.10: Oct 22 1999 / Jan 21 2000. |
| 64 | * Added stuff for setserial. |
| 65 | * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr) |
| 66 | * |
| 67 | */ |
| 68 | |
| 69 | #define VERSION "1.11" |
| 70 | |
| 71 | |
| 72 | /* |
| 73 | * There is a bunch of documentation about the card, jumpers, config |
| 74 | * settings, restrictions, cables, device names and numbers in |
| 75 | * Documentation/specialix.txt |
| 76 | */ |
| 77 | |
| 78 | #include <linux/config.h> |
| 79 | #include <linux/module.h> |
| 80 | |
| 81 | #include <asm/io.h> |
| 82 | #include <linux/kernel.h> |
| 83 | #include <linux/sched.h> |
| 84 | #include <linux/ioport.h> |
| 85 | #include <linux/interrupt.h> |
| 86 | #include <linux/errno.h> |
| 87 | #include <linux/tty.h> |
| 88 | #include <linux/mm.h> |
| 89 | #include <linux/serial.h> |
| 90 | #include <linux/fcntl.h> |
| 91 | #include <linux/major.h> |
| 92 | #include <linux/delay.h> |
| 93 | #include <linux/version.h> |
| 94 | #include <linux/pci.h> |
| 95 | #include <linux/init.h> |
| 96 | #include <asm/uaccess.h> |
| 97 | |
| 98 | #include "specialix_io8.h" |
| 99 | #include "cd1865.h" |
| 100 | |
| 101 | |
| 102 | /* |
| 103 | This driver can spew a whole lot of debugging output at you. If you |
| 104 | need maximum performance, you should disable the DEBUG define. To |
| 105 | aid in debugging in the field, I'm leaving the compile-time debug |
| 106 | features enabled, and disable them "runtime". That allows me to |
| 107 | instruct people with problems to enable debugging without requiring |
| 108 | them to recompile... |
| 109 | */ |
| 110 | #define DEBUG |
| 111 | |
| 112 | static int sx_debug; |
| 113 | static int sx_rxfifo = SPECIALIX_RXFIFO; |
| 114 | |
| 115 | #ifdef DEBUG |
| 116 | #define dprintk(f, str...) if (sx_debug & f) printk (str) |
| 117 | #else |
| 118 | #define dprintk(f, str...) /* nothing */ |
| 119 | #endif |
| 120 | |
| 121 | #define SX_DEBUG_FLOW 0x0001 |
| 122 | #define SX_DEBUG_DATA 0x0002 |
| 123 | #define SX_DEBUG_PROBE 0x0004 |
| 124 | #define SX_DEBUG_CHAN 0x0008 |
| 125 | #define SX_DEBUG_INIT 0x0010 |
| 126 | #define SX_DEBUG_RX 0x0020 |
| 127 | #define SX_DEBUG_TX 0x0040 |
| 128 | #define SX_DEBUG_IRQ 0x0080 |
| 129 | #define SX_DEBUG_OPEN 0x0100 |
| 130 | #define SX_DEBUG_TERMIOS 0x0200 |
| 131 | #define SX_DEBUG_SIGNALS 0x0400 |
| 132 | #define SX_DEBUG_FIFO 0x0800 |
| 133 | |
| 134 | |
| 135 | #define func_enter() dprintk (SX_DEBUG_FLOW, "io8: enter %s\n",__FUNCTION__) |
| 136 | #define func_exit() dprintk (SX_DEBUG_FLOW, "io8: exit %s\n", __FUNCTION__) |
| 137 | |
| 138 | #define jiffies_from_ms(a) ((((a) * HZ)/1000)+1) |
| 139 | |
| 140 | |
| 141 | /* Configurable options: */ |
| 142 | |
| 143 | /* Am I paranoid or not ? ;-) */ |
| 144 | #define SPECIALIX_PARANOIA_CHECK |
| 145 | |
| 146 | /* Do I trust the IRQ from the card? (enabeling it doesn't seem to help) |
| 147 | When the IRQ routine leaves the chip in a state that is keeps on |
| 148 | requiring attention, the timer doesn't help either. */ |
| 149 | #undef SPECIALIX_TIMER |
| 150 | |
| 151 | #ifdef SPECIALIX_TIMER |
| 152 | static int sx_poll = HZ; |
| 153 | #endif |
| 154 | |
| 155 | |
| 156 | |
| 157 | /* |
| 158 | * The following defines are mostly for testing purposes. But if you need |
| 159 | * some nice reporting in your syslog, you can define them also. |
| 160 | */ |
| 161 | #undef SX_REPORT_FIFO |
| 162 | #undef SX_REPORT_OVERRUN |
| 163 | |
| 164 | |
| 165 | |
| 166 | #ifdef CONFIG_SPECIALIX_RTSCTS |
| 167 | #define SX_CRTSCTS(bla) 1 |
| 168 | #else |
| 169 | #define SX_CRTSCTS(tty) C_CRTSCTS(tty) |
| 170 | #endif |
| 171 | |
| 172 | |
| 173 | /* Used to be outb (0xff, 0x80); */ |
| 174 | #define short_pause() udelay (1) |
| 175 | |
| 176 | |
| 177 | #define SPECIALIX_LEGAL_FLAGS \ |
| 178 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ |
| 179 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ |
| 180 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) |
| 181 | |
| 182 | #undef RS_EVENT_WRITE_WAKEUP |
| 183 | #define RS_EVENT_WRITE_WAKEUP 0 |
| 184 | |
| 185 | static struct tty_driver *specialix_driver; |
| 186 | static unsigned char * tmp_buf; |
| 187 | static DECLARE_MUTEX(tmp_buf_sem); |
| 188 | |
| 189 | static unsigned long baud_table[] = { |
| 190 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
| 191 | 9600, 19200, 38400, 57600, 115200, 0, |
| 192 | }; |
| 193 | |
| 194 | static struct specialix_board sx_board[SX_NBOARD] = { |
| 195 | { 0, SX_IOBASE1, 9, }, |
| 196 | { 0, SX_IOBASE2, 11, }, |
| 197 | { 0, SX_IOBASE3, 12, }, |
| 198 | { 0, SX_IOBASE4, 15, }, |
| 199 | }; |
| 200 | |
| 201 | static struct specialix_port sx_port[SX_NBOARD * SX_NPORT]; |
| 202 | |
| 203 | |
| 204 | #ifdef SPECIALIX_TIMER |
| 205 | static struct timer_list missed_irq_timer; |
| 206 | static irqreturn_t sx_interrupt(int irq, void * dev_id, struct pt_regs * regs); |
| 207 | #endif |
| 208 | |
| 209 | |
| 210 | |
| 211 | static inline int sx_paranoia_check(struct specialix_port const * port, |
| 212 | char *name, const char *routine) |
| 213 | { |
| 214 | #ifdef SPECIALIX_PARANOIA_CHECK |
| 215 | static const char *badmagic = |
| 216 | KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n"; |
| 217 | static const char *badinfo = |
| 218 | KERN_ERR "sx: Warning: null specialix port for device %s in %s\n"; |
| 219 | |
| 220 | if (!port) { |
| 221 | printk(badinfo, name, routine); |
| 222 | return 1; |
| 223 | } |
| 224 | if (port->magic != SPECIALIX_MAGIC) { |
| 225 | printk(badmagic, name, routine); |
| 226 | return 1; |
| 227 | } |
| 228 | #endif |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | |
| 233 | /* |
| 234 | * |
| 235 | * Service functions for specialix IO8+ driver. |
| 236 | * |
| 237 | */ |
| 238 | |
| 239 | /* Get board number from pointer */ |
| 240 | static inline int board_No (struct specialix_board * bp) |
| 241 | { |
| 242 | return bp - sx_board; |
| 243 | } |
| 244 | |
| 245 | |
| 246 | /* Get port number from pointer */ |
| 247 | static inline int port_No (struct specialix_port const * port) |
| 248 | { |
| 249 | return SX_PORT(port - sx_port); |
| 250 | } |
| 251 | |
| 252 | |
| 253 | /* Get pointer to board from pointer to port */ |
| 254 | static inline struct specialix_board * port_Board(struct specialix_port const * port) |
| 255 | { |
| 256 | return &sx_board[SX_BOARD(port - sx_port)]; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | /* Input Byte from CL CD186x register */ |
| 261 | static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg) |
| 262 | { |
| 263 | bp->reg = reg | 0x80; |
| 264 | outb (reg | 0x80, bp->base + SX_ADDR_REG); |
| 265 | return inb (bp->base + SX_DATA_REG); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* Output Byte to CL CD186x register */ |
| 270 | static inline void sx_out(struct specialix_board * bp, unsigned short reg, |
| 271 | unsigned char val) |
| 272 | { |
| 273 | bp->reg = reg | 0x80; |
| 274 | outb (reg | 0x80, bp->base + SX_ADDR_REG); |
| 275 | outb (val, bp->base + SX_DATA_REG); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | /* Input Byte from CL CD186x register */ |
| 280 | static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg) |
| 281 | { |
| 282 | bp->reg = reg; |
| 283 | outb (reg, bp->base + SX_ADDR_REG); |
| 284 | return inb (bp->base + SX_DATA_REG); |
| 285 | } |
| 286 | |
| 287 | |
| 288 | /* Output Byte to CL CD186x register */ |
| 289 | static inline void sx_out_off(struct specialix_board * bp, unsigned short reg, |
| 290 | unsigned char val) |
| 291 | { |
| 292 | bp->reg = reg; |
| 293 | outb (reg, bp->base + SX_ADDR_REG); |
| 294 | outb (val, bp->base + SX_DATA_REG); |
| 295 | } |
| 296 | |
| 297 | |
| 298 | /* Wait for Channel Command Register ready */ |
| 299 | static inline void sx_wait_CCR(struct specialix_board * bp) |
| 300 | { |
| 301 | unsigned long delay, flags; |
| 302 | unsigned char ccr; |
| 303 | |
| 304 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { |
| 305 | spin_lock_irqsave(&bp->lock, flags); |
| 306 | ccr = sx_in(bp, CD186x_CCR); |
| 307 | spin_unlock_irqrestore(&bp->lock, flags); |
| 308 | if (!ccr) |
| 309 | return; |
| 310 | udelay (1); |
| 311 | } |
| 312 | |
| 313 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
| 314 | } |
| 315 | |
| 316 | |
| 317 | /* Wait for Channel Command Register ready */ |
| 318 | static inline void sx_wait_CCR_off(struct specialix_board * bp) |
| 319 | { |
| 320 | unsigned long delay; |
| 321 | unsigned char crr; |
| 322 | unsigned long flags; |
| 323 | |
| 324 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { |
| 325 | spin_lock_irqsave(&bp->lock, flags); |
| 326 | crr = sx_in_off(bp, CD186x_CCR); |
| 327 | spin_unlock_irqrestore(&bp->lock, flags); |
| 328 | if (!crr) |
| 329 | return; |
| 330 | udelay (1); |
| 331 | } |
| 332 | |
| 333 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
| 334 | } |
| 335 | |
| 336 | |
| 337 | /* |
| 338 | * specialix IO8+ IO range functions. |
| 339 | */ |
| 340 | |
| 341 | static inline int sx_check_io_range(struct specialix_board * bp) |
| 342 | { |
| 343 | return check_region (bp->base, SX_IO_SPACE); |
| 344 | } |
| 345 | |
| 346 | |
| 347 | static inline void sx_request_io_range(struct specialix_board * bp) |
| 348 | { |
| 349 | request_region(bp->base, |
| 350 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE, |
| 351 | "specialix IO8+" ); |
| 352 | } |
| 353 | |
| 354 | |
| 355 | static inline void sx_release_io_range(struct specialix_board * bp) |
| 356 | { |
| 357 | release_region(bp->base, |
| 358 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | /* Must be called with enabled interrupts */ |
| 363 | /* Ugly. Very ugly. Don't use this for anything else than initialization |
| 364 | code */ |
| 365 | static inline void sx_long_delay(unsigned long delay) |
| 366 | { |
| 367 | unsigned long i; |
| 368 | |
| 369 | for (i = jiffies + delay; time_after(i, jiffies); ) ; |
| 370 | } |
| 371 | |
| 372 | |
| 373 | |
| 374 | /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ |
| 375 | static int sx_set_irq ( struct specialix_board *bp) |
| 376 | { |
| 377 | int virq; |
| 378 | int i; |
| 379 | unsigned long flags; |
| 380 | |
| 381 | if (bp->flags & SX_BOARD_IS_PCI) |
| 382 | return 1; |
| 383 | switch (bp->irq) { |
| 384 | /* In the same order as in the docs... */ |
| 385 | case 15: virq = 0;break; |
| 386 | case 12: virq = 1;break; |
| 387 | case 11: virq = 2;break; |
| 388 | case 9: virq = 3;break; |
| 389 | default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq); |
| 390 | return 0; |
| 391 | } |
| 392 | spin_lock_irqsave(&bp->lock, flags); |
| 393 | for (i=0;i<2;i++) { |
| 394 | sx_out(bp, CD186x_CAR, i); |
| 395 | sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); |
| 396 | } |
| 397 | spin_unlock_irqrestore(&bp->lock, flags); |
| 398 | return 1; |
| 399 | } |
| 400 | |
| 401 | |
| 402 | /* Reset and setup CD186x chip */ |
| 403 | static int sx_init_CD186x(struct specialix_board * bp) |
| 404 | { |
| 405 | unsigned long flags; |
| 406 | int scaler; |
| 407 | int rv = 1; |
| 408 | |
| 409 | func_enter(); |
| 410 | sx_wait_CCR_off(bp); /* Wait for CCR ready */ |
| 411 | spin_lock_irqsave(&bp->lock, flags); |
| 412 | sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ |
| 413 | spin_unlock_irqrestore(&bp->lock, flags); |
| 414 | sx_long_delay(HZ/20); /* Delay 0.05 sec */ |
| 415 | spin_lock_irqsave(&bp->lock, flags); |
| 416 | sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ |
| 417 | sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ |
| 418 | sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ |
| 419 | sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ |
| 420 | sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ |
| 421 | /* Set RegAckEn */ |
| 422 | sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN); |
| 423 | |
| 424 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
| 425 | scaler = SX_OSCFREQ/SPECIALIX_TPS; |
| 426 | |
| 427 | sx_out_off(bp, CD186x_PPRH, scaler >> 8); |
| 428 | sx_out_off(bp, CD186x_PPRL, scaler & 0xff); |
| 429 | spin_unlock_irqrestore(&bp->lock, flags); |
| 430 | |
| 431 | if (!sx_set_irq (bp)) { |
| 432 | /* Figure out how to pass this along... */ |
| 433 | printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq); |
| 434 | rv = 0; |
| 435 | } |
| 436 | |
| 437 | func_exit(); |
| 438 | return rv; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | static int read_cross_byte (struct specialix_board *bp, int reg, int bit) |
| 443 | { |
| 444 | int i; |
| 445 | int t; |
| 446 | unsigned long flags; |
| 447 | |
| 448 | spin_lock_irqsave(&bp->lock, flags); |
| 449 | for (i=0, t=0;i<8;i++) { |
| 450 | sx_out_off (bp, CD186x_CAR, i); |
| 451 | if (sx_in_off (bp, reg) & bit) |
| 452 | t |= 1 << i; |
| 453 | } |
| 454 | spin_unlock_irqrestore(&bp->lock, flags); |
| 455 | |
| 456 | return t; |
| 457 | } |
| 458 | |
| 459 | |
| 460 | #ifdef SPECIALIX_TIMER |
| 461 | void missed_irq (unsigned long data) |
| 462 | { |
| 463 | unsigned char irq; |
| 464 | unsigned long flags; |
| 465 | struct specialix_board *bp = (struct specialix_board *)data; |
| 466 | |
| 467 | spin_lock_irqsave(&bp->lock, flags); |
| 468 | irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) & |
| 469 | (SRSR_RREQint | |
| 470 | SRSR_TREQint | |
| 471 | SRSR_MREQint); |
| 472 | spin_unlock_irqrestore(&bp->lock, flags); |
| 473 | if (irq) { |
| 474 | printk (KERN_INFO "Missed interrupt... Calling int from timer. \n"); |
| 475 | sx_interrupt (((struct specialix_board *)data)->irq, |
| 476 | (void*)data, NULL); |
| 477 | } |
| 478 | missed_irq_timer.expires = jiffies + sx_poll; |
| 479 | add_timer (&missed_irq_timer); |
| 480 | } |
| 481 | #endif |
| 482 | |
| 483 | |
| 484 | |
| 485 | /* Main probing routine, also sets irq. */ |
| 486 | static int sx_probe(struct specialix_board *bp) |
| 487 | { |
| 488 | unsigned char val1, val2; |
| 489 | #if 0 |
| 490 | int irqs = 0; |
| 491 | int retries; |
| 492 | #endif |
| 493 | int rev; |
| 494 | int chip; |
| 495 | |
| 496 | func_enter(); |
| 497 | |
| 498 | if (sx_check_io_range(bp)) { |
| 499 | func_exit(); |
| 500 | return 1; |
| 501 | } |
| 502 | |
| 503 | /* Are the I/O ports here ? */ |
| 504 | sx_out_off(bp, CD186x_PPRL, 0x5a); |
| 505 | short_pause (); |
| 506 | val1 = sx_in_off(bp, CD186x_PPRL); |
| 507 | |
| 508 | sx_out_off(bp, CD186x_PPRL, 0xa5); |
| 509 | short_pause (); |
| 510 | val2 = sx_in_off(bp, CD186x_PPRL); |
| 511 | |
| 512 | |
| 513 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
| 514 | printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n", |
| 515 | board_No(bp), bp->base); |
| 516 | func_exit(); |
| 517 | return 1; |
| 518 | } |
| 519 | |
| 520 | /* Check the DSR lines that Specialix uses as board |
| 521 | identification */ |
| 522 | val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR); |
| 523 | val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS); |
| 524 | dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n", |
| 525 | board_No(bp), val1, val2); |
| 526 | |
| 527 | /* They managed to switch the bit order between the docs and |
| 528 | the IO8+ card. The new PCI card now conforms to old docs. |
| 529 | They changed the PCI docs to reflect the situation on the |
| 530 | old card. */ |
| 531 | val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; |
| 532 | if (val1 != val2) { |
| 533 | printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", |
| 534 | board_No(bp), val2, bp->base, val1); |
| 535 | func_exit(); |
| 536 | return 1; |
| 537 | } |
| 538 | |
| 539 | |
| 540 | #if 0 |
| 541 | /* It's time to find IRQ for this board */ |
| 542 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { |
| 543 | irqs = probe_irq_on(); |
| 544 | sx_init_CD186x(bp); /* Reset CD186x chip */ |
| 545 | sx_out(bp, CD186x_CAR, 2); /* Select port 2 */ |
| 546 | sx_wait_CCR(bp); |
| 547 | sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */ |
| 548 | sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */ |
| 549 | sx_long_delay(HZ/20); |
| 550 | irqs = probe_irq_off(irqs); |
| 551 | |
| 552 | dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR)); |
| 553 | dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR)); |
| 554 | dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR)); |
| 555 | dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR)); |
| 556 | dprintk (SX_DEBUG_INIT, "\n"); |
| 557 | |
| 558 | /* Reset CD186x again */ |
| 559 | if (!sx_init_CD186x(bp)) { |
| 560 | /* Hmmm. This is dead code anyway. */ |
| 561 | } |
| 562 | |
| 563 | dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n", |
| 564 | val1, val2, val3); |
| 565 | |
| 566 | } |
| 567 | |
| 568 | #if 0 |
| 569 | if (irqs <= 0) { |
| 570 | printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n", |
| 571 | board_No(bp), bp->base); |
| 572 | func_exit(); |
| 573 | return 1; |
| 574 | } |
| 575 | #endif |
| 576 | printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs); |
| 577 | if (irqs > 0) |
| 578 | bp->irq = irqs; |
| 579 | #endif |
| 580 | /* Reset CD186x again */ |
| 581 | if (!sx_init_CD186x(bp)) { |
| 582 | func_exit(); |
| 583 | return -EIO; |
| 584 | } |
| 585 | |
| 586 | sx_request_io_range(bp); |
| 587 | bp->flags |= SX_BOARD_PRESENT; |
| 588 | |
| 589 | /* Chip revcode pkgtype |
| 590 | GFRCR SRCR bit 7 |
| 591 | CD180 rev B 0x81 0 |
| 592 | CD180 rev C 0x82 0 |
| 593 | CD1864 rev A 0x82 1 |
| 594 | CD1865 rev A 0x83 1 -- Do not use!!! Does not work. |
| 595 | CD1865 rev B 0x84 1 |
| 596 | -- Thanks to Gwen Wang, Cirrus Logic. |
| 597 | */ |
| 598 | |
| 599 | switch (sx_in_off(bp, CD186x_GFRCR)) { |
| 600 | case 0x82:chip = 1864;rev='A';break; |
| 601 | case 0x83:chip = 1865;rev='A';break; |
| 602 | case 0x84:chip = 1865;rev='B';break; |
| 603 | case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */ |
| 604 | default:chip=-1;rev='x'; |
| 605 | } |
| 606 | |
| 607 | dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) ); |
| 608 | |
| 609 | #ifdef SPECIALIX_TIMER |
| 610 | init_timer (&missed_irq_timer); |
| 611 | missed_irq_timer.function = missed_irq; |
| 612 | missed_irq_timer.data = (unsigned long) bp; |
| 613 | missed_irq_timer.expires = jiffies + sx_poll; |
| 614 | add_timer (&missed_irq_timer); |
| 615 | #endif |
| 616 | |
| 617 | printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", |
| 618 | board_No(bp), |
| 619 | bp->base, bp->irq, |
| 620 | chip, rev); |
| 621 | |
| 622 | func_exit(); |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * |
| 628 | * Interrupt processing routines. |
| 629 | * */ |
| 630 | |
| 631 | static inline void sx_mark_event(struct specialix_port * port, int event) |
| 632 | { |
| 633 | func_enter(); |
| 634 | |
| 635 | set_bit(event, &port->event); |
| 636 | schedule_work(&port->tqueue); |
| 637 | |
| 638 | func_exit(); |
| 639 | } |
| 640 | |
| 641 | |
| 642 | static inline struct specialix_port * sx_get_port(struct specialix_board * bp, |
| 643 | unsigned char const * what) |
| 644 | { |
| 645 | unsigned char channel; |
| 646 | struct specialix_port * port = NULL; |
| 647 | |
| 648 | channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; |
| 649 | dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel); |
| 650 | if (channel < CD186x_NCH) { |
| 651 | port = &sx_port[board_No(bp) * SX_NPORT + channel]; |
| 652 | dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED); |
| 653 | |
| 654 | if (port->flags & ASYNC_INITIALIZED) { |
| 655 | dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port); |
| 656 | func_exit(); |
| 657 | return port; |
| 658 | } |
| 659 | } |
| 660 | printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", |
| 661 | board_No(bp), what, channel); |
| 662 | return NULL; |
| 663 | } |
| 664 | |
| 665 | |
| 666 | static inline void sx_receive_exc(struct specialix_board * bp) |
| 667 | { |
| 668 | struct specialix_port *port; |
| 669 | struct tty_struct *tty; |
| 670 | unsigned char status; |
| 671 | unsigned char ch; |
| 672 | |
| 673 | func_enter(); |
| 674 | |
| 675 | port = sx_get_port(bp, "Receive"); |
| 676 | if (!port) { |
| 677 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); |
| 678 | func_exit(); |
| 679 | return; |
| 680 | } |
| 681 | tty = port->tty; |
| 682 | dprintk (SX_DEBUG_RX, "port: %p count: %d BUFF_SIZE: %d\n", |
| 683 | port, tty->flip.count, TTY_FLIPBUF_SIZE); |
| 684 | |
| 685 | status = sx_in(bp, CD186x_RCSR); |
| 686 | |
| 687 | dprintk (SX_DEBUG_RX, "status: 0x%x\n", status); |
| 688 | if (status & RCSR_OE) { |
| 689 | port->overrun++; |
| 690 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n", |
| 691 | board_No(bp), port_No(port), port->overrun); |
| 692 | } |
| 693 | status &= port->mark_mask; |
| 694 | |
| 695 | /* This flip buffer check needs to be below the reading of the |
| 696 | status register to reset the chip's IRQ.... */ |
| 697 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
| 698 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n", |
| 699 | board_No(bp), port_No(port)); |
| 700 | func_exit(); |
| 701 | return; |
| 702 | } |
| 703 | |
| 704 | ch = sx_in(bp, CD186x_RDR); |
| 705 | if (!status) { |
| 706 | func_exit(); |
| 707 | return; |
| 708 | } |
| 709 | if (status & RCSR_TOUT) { |
| 710 | printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n", |
| 711 | board_No(bp), port_No(port)); |
| 712 | func_exit(); |
| 713 | return; |
| 714 | |
| 715 | } else if (status & RCSR_BREAK) { |
| 716 | dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n", |
| 717 | board_No(bp), port_No(port)); |
| 718 | *tty->flip.flag_buf_ptr++ = TTY_BREAK; |
| 719 | if (port->flags & ASYNC_SAK) |
| 720 | do_SAK(tty); |
| 721 | |
| 722 | } else if (status & RCSR_PE) |
| 723 | *tty->flip.flag_buf_ptr++ = TTY_PARITY; |
| 724 | |
| 725 | else if (status & RCSR_FE) |
| 726 | *tty->flip.flag_buf_ptr++ = TTY_FRAME; |
| 727 | |
| 728 | else if (status & RCSR_OE) |
| 729 | *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; |
| 730 | |
| 731 | else |
| 732 | *tty->flip.flag_buf_ptr++ = 0; |
| 733 | |
| 734 | *tty->flip.char_buf_ptr++ = ch; |
| 735 | tty->flip.count++; |
| 736 | schedule_delayed_work(&tty->flip.work, 1); |
| 737 | |
| 738 | func_exit(); |
| 739 | } |
| 740 | |
| 741 | |
| 742 | static inline void sx_receive(struct specialix_board * bp) |
| 743 | { |
| 744 | struct specialix_port *port; |
| 745 | struct tty_struct *tty; |
| 746 | unsigned char count; |
| 747 | |
| 748 | func_enter(); |
| 749 | |
| 750 | if (!(port = sx_get_port(bp, "Receive"))) { |
| 751 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); |
| 752 | func_exit(); |
| 753 | return; |
| 754 | } |
| 755 | tty = port->tty; |
| 756 | |
| 757 | count = sx_in(bp, CD186x_RDCR); |
| 758 | dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count); |
| 759 | port->hits[count > 8 ? 9 : count]++; |
| 760 | |
| 761 | while (count--) { |
| 762 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
| 763 | printk(KERN_INFO "sx%d: port %d: Working around flip buffer overflow.\n", |
| 764 | board_No(bp), port_No(port)); |
| 765 | break; |
| 766 | } |
| 767 | *tty->flip.char_buf_ptr++ = sx_in(bp, CD186x_RDR); |
| 768 | *tty->flip.flag_buf_ptr++ = 0; |
| 769 | tty->flip.count++; |
| 770 | } |
| 771 | schedule_delayed_work(&tty->flip.work, 1); |
| 772 | |
| 773 | func_exit(); |
| 774 | } |
| 775 | |
| 776 | |
| 777 | static inline void sx_transmit(struct specialix_board * bp) |
| 778 | { |
| 779 | struct specialix_port *port; |
| 780 | struct tty_struct *tty; |
| 781 | unsigned char count; |
| 782 | |
| 783 | func_enter(); |
| 784 | if (!(port = sx_get_port(bp, "Transmit"))) { |
| 785 | func_exit(); |
| 786 | return; |
| 787 | } |
| 788 | dprintk (SX_DEBUG_TX, "port: %p\n", port); |
| 789 | tty = port->tty; |
| 790 | |
| 791 | if (port->IER & IER_TXEMPTY) { |
| 792 | /* FIFO drained */ |
| 793 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 794 | port->IER &= ~IER_TXEMPTY; |
| 795 | sx_out(bp, CD186x_IER, port->IER); |
| 796 | func_exit(); |
| 797 | return; |
| 798 | } |
| 799 | |
| 800 | if ((port->xmit_cnt <= 0 && !port->break_length) |
| 801 | || tty->stopped || tty->hw_stopped) { |
| 802 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 803 | port->IER &= ~IER_TXRDY; |
| 804 | sx_out(bp, CD186x_IER, port->IER); |
| 805 | func_exit(); |
| 806 | return; |
| 807 | } |
| 808 | |
| 809 | if (port->break_length) { |
| 810 | if (port->break_length > 0) { |
| 811 | if (port->COR2 & COR2_ETC) { |
| 812 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); |
| 813 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); |
| 814 | port->COR2 &= ~COR2_ETC; |
| 815 | } |
| 816 | count = min_t(int, port->break_length, 0xff); |
| 817 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); |
| 818 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); |
| 819 | sx_out(bp, CD186x_TDR, count); |
| 820 | if (!(port->break_length -= count)) |
| 821 | port->break_length--; |
| 822 | } else { |
| 823 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); |
| 824 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); |
| 825 | sx_out(bp, CD186x_COR2, port->COR2); |
| 826 | sx_wait_CCR(bp); |
| 827 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); |
| 828 | port->break_length = 0; |
| 829 | } |
| 830 | |
| 831 | func_exit(); |
| 832 | return; |
| 833 | } |
| 834 | |
| 835 | count = CD186x_NFIFO; |
| 836 | do { |
| 837 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); |
| 838 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); |
| 839 | if (--port->xmit_cnt <= 0) |
| 840 | break; |
| 841 | } while (--count > 0); |
| 842 | |
| 843 | if (port->xmit_cnt <= 0) { |
| 844 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 845 | port->IER &= ~IER_TXRDY; |
| 846 | sx_out(bp, CD186x_IER, port->IER); |
| 847 | } |
| 848 | if (port->xmit_cnt <= port->wakeup_chars) |
| 849 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); |
| 850 | |
| 851 | func_exit(); |
| 852 | } |
| 853 | |
| 854 | |
| 855 | static inline void sx_check_modem(struct specialix_board * bp) |
| 856 | { |
| 857 | struct specialix_port *port; |
| 858 | struct tty_struct *tty; |
| 859 | unsigned char mcr; |
| 860 | int msvr_cd; |
| 861 | |
| 862 | dprintk (SX_DEBUG_SIGNALS, "Modem intr. "); |
| 863 | if (!(port = sx_get_port(bp, "Modem"))) |
| 864 | return; |
| 865 | |
| 866 | tty = port->tty; |
| 867 | |
| 868 | mcr = sx_in(bp, CD186x_MCR); |
| 869 | printk ("mcr = %02x.\n", mcr); |
| 870 | |
| 871 | if ((mcr & MCR_CDCHG)) { |
| 872 | dprintk (SX_DEBUG_SIGNALS, "CD just changed... "); |
| 873 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; |
| 874 | if (msvr_cd) { |
| 875 | dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); |
| 876 | wake_up_interruptible(&port->open_wait); |
| 877 | } else { |
| 878 | dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n"); |
| 879 | schedule_work(&port->tqueue_hangup); |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
| 884 | if (mcr & MCR_CTSCHG) { |
| 885 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { |
| 886 | tty->hw_stopped = 0; |
| 887 | port->IER |= IER_TXRDY; |
| 888 | if (port->xmit_cnt <= port->wakeup_chars) |
| 889 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); |
| 890 | } else { |
| 891 | tty->hw_stopped = 1; |
| 892 | port->IER &= ~IER_TXRDY; |
| 893 | } |
| 894 | sx_out(bp, CD186x_IER, port->IER); |
| 895 | } |
| 896 | if (mcr & MCR_DSSXHG) { |
| 897 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { |
| 898 | tty->hw_stopped = 0; |
| 899 | port->IER |= IER_TXRDY; |
| 900 | if (port->xmit_cnt <= port->wakeup_chars) |
| 901 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); |
| 902 | } else { |
| 903 | tty->hw_stopped = 1; |
| 904 | port->IER &= ~IER_TXRDY; |
| 905 | } |
| 906 | sx_out(bp, CD186x_IER, port->IER); |
| 907 | } |
| 908 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ |
| 909 | |
| 910 | /* Clear change bits */ |
| 911 | sx_out(bp, CD186x_MCR, 0); |
| 912 | } |
| 913 | |
| 914 | |
| 915 | /* The main interrupt processing routine */ |
| 916 | static irqreturn_t sx_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 917 | { |
| 918 | unsigned char status; |
| 919 | unsigned char ack; |
| 920 | struct specialix_board *bp; |
| 921 | unsigned long loop = 0; |
| 922 | int saved_reg; |
| 923 | unsigned long flags; |
| 924 | |
| 925 | func_enter(); |
| 926 | |
| 927 | bp = dev_id; |
| 928 | spin_lock_irqsave(&bp->lock, flags); |
| 929 | |
| 930 | dprintk (SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __FUNCTION__, port_No(sx_get_port(bp, "INT")), SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1); |
| 931 | if (!bp || !(bp->flags & SX_BOARD_ACTIVE)) { |
| 932 | dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq); |
| 933 | spin_unlock_irqrestore(&bp->lock, flags); |
| 934 | func_exit(); |
| 935 | return IRQ_NONE; |
| 936 | } |
| 937 | |
| 938 | saved_reg = bp->reg; |
| 939 | |
| 940 | while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) & |
| 941 | (SRSR_RREQint | |
| 942 | SRSR_TREQint | |
| 943 | SRSR_MREQint)))) { |
| 944 | if (status & SRSR_RREQint) { |
| 945 | ack = sx_in(bp, CD186x_RRAR); |
| 946 | |
| 947 | if (ack == (SX_ID | GIVR_IT_RCV)) |
| 948 | sx_receive(bp); |
| 949 | else if (ack == (SX_ID | GIVR_IT_REXC)) |
| 950 | sx_receive_exc(bp); |
| 951 | else |
| 952 | printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", |
| 953 | board_No(bp), status, ack); |
| 954 | |
| 955 | } else if (status & SRSR_TREQint) { |
| 956 | ack = sx_in(bp, CD186x_TRAR); |
| 957 | |
| 958 | if (ack == (SX_ID | GIVR_IT_TX)) |
| 959 | sx_transmit(bp); |
| 960 | else |
| 961 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", |
| 962 | board_No(bp), status, ack, port_No (sx_get_port (bp, "Int"))); |
| 963 | } else if (status & SRSR_MREQint) { |
| 964 | ack = sx_in(bp, CD186x_MRAR); |
| 965 | |
| 966 | if (ack == (SX_ID | GIVR_IT_MODEM)) |
| 967 | sx_check_modem(bp); |
| 968 | else |
| 969 | printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", |
| 970 | board_No(bp), status, ack); |
| 971 | |
| 972 | } |
| 973 | |
| 974 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ |
| 975 | } |
| 976 | bp->reg = saved_reg; |
| 977 | outb (bp->reg, bp->base + SX_ADDR_REG); |
| 978 | spin_unlock_irqrestore(&bp->lock, flags); |
| 979 | func_exit(); |
| 980 | return IRQ_HANDLED; |
| 981 | } |
| 982 | |
| 983 | |
| 984 | /* |
| 985 | * Routines for open & close processing. |
| 986 | */ |
| 987 | |
| 988 | static void turn_ints_off (struct specialix_board *bp) |
| 989 | { |
| 990 | unsigned long flags; |
| 991 | |
| 992 | func_enter(); |
| 993 | if (bp->flags & SX_BOARD_IS_PCI) { |
| 994 | /* This was intended for enabeling the interrupt on the |
| 995 | * PCI card. However it seems that it's already enabled |
| 996 | * and as PCI interrupts can be shared, there is no real |
| 997 | * reason to have to turn it off. */ |
| 998 | } |
| 999 | |
| 1000 | spin_lock_irqsave(&bp->lock, flags); |
| 1001 | (void) sx_in_off (bp, 0); /* Turn off interrupts. */ |
| 1002 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1003 | |
| 1004 | func_exit(); |
| 1005 | } |
| 1006 | |
| 1007 | static void turn_ints_on (struct specialix_board *bp) |
| 1008 | { |
| 1009 | unsigned long flags; |
| 1010 | |
| 1011 | func_enter(); |
| 1012 | |
| 1013 | if (bp->flags & SX_BOARD_IS_PCI) { |
| 1014 | /* play with the PCI chip. See comment above. */ |
| 1015 | } |
| 1016 | spin_lock_irqsave(&bp->lock, flags); |
| 1017 | (void) sx_in (bp, 0); /* Turn ON interrupts. */ |
| 1018 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1019 | |
| 1020 | func_exit(); |
| 1021 | } |
| 1022 | |
| 1023 | |
| 1024 | /* Called with disabled interrupts */ |
| 1025 | static inline int sx_setup_board(struct specialix_board * bp) |
| 1026 | { |
| 1027 | int error; |
| 1028 | |
| 1029 | if (bp->flags & SX_BOARD_ACTIVE) |
| 1030 | return 0; |
| 1031 | |
| 1032 | if (bp->flags & SX_BOARD_IS_PCI) |
| 1033 | error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT | SA_SHIRQ, "specialix IO8+", bp); |
| 1034 | else |
| 1035 | error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT, "specialix IO8+", bp); |
| 1036 | |
| 1037 | if (error) |
| 1038 | return error; |
| 1039 | |
| 1040 | turn_ints_on (bp); |
| 1041 | bp->flags |= SX_BOARD_ACTIVE; |
| 1042 | |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | |
| 1047 | /* Called with disabled interrupts */ |
| 1048 | static inline void sx_shutdown_board(struct specialix_board *bp) |
| 1049 | { |
| 1050 | func_enter(); |
| 1051 | |
| 1052 | if (!(bp->flags & SX_BOARD_ACTIVE)) { |
| 1053 | func_exit(); |
| 1054 | return; |
| 1055 | } |
| 1056 | |
| 1057 | bp->flags &= ~SX_BOARD_ACTIVE; |
| 1058 | |
| 1059 | dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", |
| 1060 | bp->irq, board_No (bp)); |
| 1061 | free_irq(bp->irq, bp); |
| 1062 | |
| 1063 | turn_ints_off (bp); |
| 1064 | |
| 1065 | |
| 1066 | func_exit(); |
| 1067 | } |
| 1068 | |
| 1069 | |
| 1070 | /* |
| 1071 | * Setting up port characteristics. |
| 1072 | * Must be called with disabled interrupts |
| 1073 | */ |
| 1074 | static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port) |
| 1075 | { |
| 1076 | struct tty_struct *tty; |
| 1077 | unsigned long baud; |
| 1078 | long tmp; |
| 1079 | unsigned char cor1 = 0, cor3 = 0; |
| 1080 | unsigned char mcor1 = 0, mcor2 = 0; |
| 1081 | static unsigned long again; |
| 1082 | unsigned long flags; |
| 1083 | |
| 1084 | func_enter(); |
| 1085 | |
| 1086 | if (!(tty = port->tty) || !tty->termios) { |
| 1087 | func_exit(); |
| 1088 | return; |
| 1089 | } |
| 1090 | |
| 1091 | port->IER = 0; |
| 1092 | port->COR2 = 0; |
| 1093 | /* Select port on the board */ |
| 1094 | spin_lock_irqsave(&bp->lock, flags); |
| 1095 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1096 | |
| 1097 | /* The Specialix board doens't implement the RTS lines. |
| 1098 | They are used to set the IRQ level. Don't touch them. */ |
| 1099 | if (SX_CRTSCTS(tty)) |
| 1100 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); |
| 1101 | else |
| 1102 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); |
| 1103 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1104 | dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); |
| 1105 | baud = C_BAUD(tty); |
| 1106 | |
| 1107 | if (baud & CBAUDEX) { |
| 1108 | baud &= ~CBAUDEX; |
| 1109 | if (baud < 1 || baud > 2) |
| 1110 | port->tty->termios->c_cflag &= ~CBAUDEX; |
| 1111 | else |
| 1112 | baud += 15; |
| 1113 | } |
| 1114 | if (baud == 15) { |
| 1115 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 1116 | baud ++; |
| 1117 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 1118 | baud += 2; |
| 1119 | } |
| 1120 | |
| 1121 | |
| 1122 | if (!baud_table[baud]) { |
| 1123 | /* Drop DTR & exit */ |
| 1124 | dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); |
| 1125 | if (!SX_CRTSCTS (tty)) { |
| 1126 | port -> MSVR &= ~ MSVR_DTR; |
| 1127 | spin_lock_irqsave(&bp->lock, flags); |
| 1128 | sx_out(bp, CD186x_MSVR, port->MSVR ); |
| 1129 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1130 | } |
| 1131 | else |
| 1132 | dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); |
| 1133 | return; |
| 1134 | } else { |
| 1135 | /* Set DTR on */ |
| 1136 | if (!SX_CRTSCTS (tty)) { |
| 1137 | port ->MSVR |= MSVR_DTR; |
| 1138 | } |
| 1139 | } |
| 1140 | |
| 1141 | /* |
| 1142 | * Now we must calculate some speed depended things |
| 1143 | */ |
| 1144 | |
| 1145 | /* Set baud rate for port */ |
| 1146 | tmp = port->custom_divisor ; |
| 1147 | if ( tmp ) |
| 1148 | printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n" |
| 1149 | "This is an untested option, please be carefull.\n", |
| 1150 | port_No (port), tmp); |
| 1151 | else |
| 1152 | tmp = (((SX_OSCFREQ + baud_table[baud]/2) / baud_table[baud] + |
| 1153 | CD186x_TPC/2) / CD186x_TPC); |
| 1154 | |
| 1155 | if ((tmp < 0x10) && time_before(again, jiffies)) { |
| 1156 | again = jiffies + HZ * 60; |
| 1157 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ |
| 1158 | if (tmp >= 12) { |
| 1159 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
| 1160 | "Performance degradation is possible.\n" |
| 1161 | "Read specialix.txt for more info.\n", |
| 1162 | port_No (port), tmp); |
| 1163 | } else { |
| 1164 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
| 1165 | "Warning: overstressing Cirrus chip. " |
| 1166 | "This might not work.\n" |
| 1167 | "Read specialix.txt for more info.\n", |
| 1168 | port_No (port), tmp); |
| 1169 | } |
| 1170 | } |
| 1171 | spin_lock_irqsave(&bp->lock, flags); |
| 1172 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); |
| 1173 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); |
| 1174 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); |
| 1175 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); |
| 1176 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1177 | if (port->custom_divisor) { |
| 1178 | baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor; |
| 1179 | baud = ( baud + 5 ) / 10; |
| 1180 | } else |
| 1181 | baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */ |
| 1182 | |
| 1183 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
| 1184 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; |
| 1185 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
| 1186 | SERIAL_XMIT_SIZE - 1 : tmp); |
| 1187 | |
| 1188 | /* Receiver timeout will be transmission time for 1.5 chars */ |
| 1189 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; |
| 1190 | tmp = (tmp > 0xff) ? 0xff : tmp; |
| 1191 | spin_lock_irqsave(&bp->lock, flags); |
| 1192 | sx_out(bp, CD186x_RTPR, tmp); |
| 1193 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1194 | switch (C_CSIZE(tty)) { |
| 1195 | case CS5: |
| 1196 | cor1 |= COR1_5BITS; |
| 1197 | break; |
| 1198 | case CS6: |
| 1199 | cor1 |= COR1_6BITS; |
| 1200 | break; |
| 1201 | case CS7: |
| 1202 | cor1 |= COR1_7BITS; |
| 1203 | break; |
| 1204 | case CS8: |
| 1205 | cor1 |= COR1_8BITS; |
| 1206 | break; |
| 1207 | } |
| 1208 | |
| 1209 | if (C_CSTOPB(tty)) |
| 1210 | cor1 |= COR1_2SB; |
| 1211 | |
| 1212 | cor1 |= COR1_IGNORE; |
| 1213 | if (C_PARENB(tty)) { |
| 1214 | cor1 |= COR1_NORMPAR; |
| 1215 | if (C_PARODD(tty)) |
| 1216 | cor1 |= COR1_ODDP; |
| 1217 | if (I_INPCK(tty)) |
| 1218 | cor1 &= ~COR1_IGNORE; |
| 1219 | } |
| 1220 | /* Set marking of some errors */ |
| 1221 | port->mark_mask = RCSR_OE | RCSR_TOUT; |
| 1222 | if (I_INPCK(tty)) |
| 1223 | port->mark_mask |= RCSR_FE | RCSR_PE; |
| 1224 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
| 1225 | port->mark_mask |= RCSR_BREAK; |
| 1226 | if (I_IGNPAR(tty)) |
| 1227 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
| 1228 | if (I_IGNBRK(tty)) { |
| 1229 | port->mark_mask &= ~RCSR_BREAK; |
| 1230 | if (I_IGNPAR(tty)) |
| 1231 | /* Real raw mode. Ignore all */ |
| 1232 | port->mark_mask &= ~RCSR_OE; |
| 1233 | } |
| 1234 | /* Enable Hardware Flow Control */ |
| 1235 | if (C_CRTSCTS(tty)) { |
| 1236 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
| 1237 | port->IER |= IER_DSR | IER_CTS; |
| 1238 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; |
| 1239 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; |
| 1240 | spin_lock_irqsave(&bp->lock, flags); |
| 1241 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR)); |
| 1242 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1243 | #else |
| 1244 | port->COR2 |= COR2_CTSAE; |
| 1245 | #endif |
| 1246 | } |
| 1247 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ |
| 1248 | /* Some people reported that it works, but I still doubt it */ |
| 1249 | if (I_IXON(tty)) { |
| 1250 | port->COR2 |= COR2_TXIBE; |
| 1251 | cor3 |= (COR3_FCT | COR3_SCDE); |
| 1252 | if (I_IXANY(tty)) |
| 1253 | port->COR2 |= COR2_IXM; |
| 1254 | spin_lock_irqsave(&bp->lock, flags); |
| 1255 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); |
| 1256 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); |
| 1257 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); |
| 1258 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); |
| 1259 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1260 | } |
| 1261 | if (!C_CLOCAL(tty)) { |
| 1262 | /* Enable CD check */ |
| 1263 | port->IER |= IER_CD; |
| 1264 | mcor1 |= MCOR1_CDZD; |
| 1265 | mcor2 |= MCOR2_CDOD; |
| 1266 | } |
| 1267 | |
| 1268 | if (C_CREAD(tty)) |
| 1269 | /* Enable receiver */ |
| 1270 | port->IER |= IER_RXD; |
| 1271 | |
| 1272 | /* Set input FIFO size (1-8 bytes) */ |
| 1273 | cor3 |= sx_rxfifo; |
| 1274 | /* Setting up CD186x channel registers */ |
| 1275 | spin_lock_irqsave(&bp->lock, flags); |
| 1276 | sx_out(bp, CD186x_COR1, cor1); |
| 1277 | sx_out(bp, CD186x_COR2, port->COR2); |
| 1278 | sx_out(bp, CD186x_COR3, cor3); |
| 1279 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1280 | /* Make CD186x know about registers change */ |
| 1281 | sx_wait_CCR(bp); |
| 1282 | spin_lock_irqsave(&bp->lock, flags); |
| 1283 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); |
| 1284 | /* Setting up modem option registers */ |
| 1285 | dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2); |
| 1286 | sx_out(bp, CD186x_MCOR1, mcor1); |
| 1287 | sx_out(bp, CD186x_MCOR2, mcor2); |
| 1288 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1289 | /* Enable CD186x transmitter & receiver */ |
| 1290 | sx_wait_CCR(bp); |
| 1291 | spin_lock_irqsave(&bp->lock, flags); |
| 1292 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); |
| 1293 | /* Enable interrupts */ |
| 1294 | sx_out(bp, CD186x_IER, port->IER); |
| 1295 | /* And finally set the modem lines... */ |
| 1296 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 1297 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1298 | |
| 1299 | func_exit(); |
| 1300 | } |
| 1301 | |
| 1302 | |
| 1303 | /* Must be called with interrupts enabled */ |
| 1304 | static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port) |
| 1305 | { |
| 1306 | unsigned long flags; |
| 1307 | |
| 1308 | func_enter(); |
| 1309 | |
| 1310 | if (port->flags & ASYNC_INITIALIZED) { |
| 1311 | func_exit(); |
| 1312 | return 0; |
| 1313 | } |
| 1314 | |
| 1315 | if (!port->xmit_buf) { |
| 1316 | /* We may sleep in get_zeroed_page() */ |
| 1317 | unsigned long tmp; |
| 1318 | |
| 1319 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) { |
| 1320 | func_exit(); |
| 1321 | return -ENOMEM; |
| 1322 | } |
| 1323 | |
| 1324 | if (port->xmit_buf) { |
| 1325 | free_page(tmp); |
| 1326 | func_exit(); |
| 1327 | return -ERESTARTSYS; |
| 1328 | } |
| 1329 | port->xmit_buf = (unsigned char *) tmp; |
| 1330 | } |
| 1331 | |
| 1332 | spin_lock_irqsave(&port->lock, flags); |
| 1333 | |
| 1334 | if (port->tty) |
| 1335 | clear_bit(TTY_IO_ERROR, &port->tty->flags); |
| 1336 | |
| 1337 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| 1338 | sx_change_speed(bp, port); |
| 1339 | port->flags |= ASYNC_INITIALIZED; |
| 1340 | |
| 1341 | spin_unlock_irqrestore(&port->lock, flags); |
| 1342 | |
| 1343 | |
| 1344 | func_exit(); |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | |
| 1349 | /* Must be called with interrupts disabled */ |
| 1350 | static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port) |
| 1351 | { |
| 1352 | struct tty_struct *tty; |
| 1353 | int i; |
| 1354 | unsigned long flags; |
| 1355 | |
| 1356 | func_enter(); |
| 1357 | |
| 1358 | if (!(port->flags & ASYNC_INITIALIZED)) { |
| 1359 | func_exit(); |
| 1360 | return; |
| 1361 | } |
| 1362 | |
| 1363 | if (sx_debug & SX_DEBUG_FIFO) { |
| 1364 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ", |
| 1365 | board_No(bp), port_No(port), port->overrun); |
| 1366 | for (i = 0; i < 10; i++) { |
| 1367 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); |
| 1368 | } |
| 1369 | dprintk(SX_DEBUG_FIFO, "].\n"); |
| 1370 | } |
| 1371 | |
| 1372 | if (port->xmit_buf) { |
| 1373 | free_page((unsigned long) port->xmit_buf); |
| 1374 | port->xmit_buf = NULL; |
| 1375 | } |
| 1376 | |
| 1377 | /* Select port */ |
| 1378 | spin_lock_irqsave(&bp->lock, flags); |
| 1379 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1380 | |
| 1381 | if (!(tty = port->tty) || C_HUPCL(tty)) { |
| 1382 | /* Drop DTR */ |
| 1383 | sx_out(bp, CD186x_MSVDTR, 0); |
| 1384 | } |
| 1385 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1386 | /* Reset port */ |
| 1387 | sx_wait_CCR(bp); |
| 1388 | spin_lock_irqsave(&bp->lock, flags); |
| 1389 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); |
| 1390 | /* Disable all interrupts from this port */ |
| 1391 | port->IER = 0; |
| 1392 | sx_out(bp, CD186x_IER, port->IER); |
| 1393 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1394 | if (tty) |
| 1395 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 1396 | port->flags &= ~ASYNC_INITIALIZED; |
| 1397 | |
| 1398 | if (!bp->count) |
| 1399 | sx_shutdown_board(bp); |
| 1400 | func_exit(); |
| 1401 | } |
| 1402 | |
| 1403 | |
| 1404 | static int block_til_ready(struct tty_struct *tty, struct file * filp, |
| 1405 | struct specialix_port *port) |
| 1406 | { |
| 1407 | DECLARE_WAITQUEUE(wait, current); |
| 1408 | struct specialix_board *bp = port_Board(port); |
| 1409 | int retval; |
| 1410 | int do_clocal = 0; |
| 1411 | int CD; |
| 1412 | unsigned long flags; |
| 1413 | |
| 1414 | func_enter(); |
| 1415 | |
| 1416 | /* |
| 1417 | * If the device is in the middle of being closed, then block |
| 1418 | * until it's done, and then try again. |
| 1419 | */ |
| 1420 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { |
| 1421 | interruptible_sleep_on(&port->close_wait); |
| 1422 | if (port->flags & ASYNC_HUP_NOTIFY) { |
| 1423 | func_exit(); |
| 1424 | return -EAGAIN; |
| 1425 | } else { |
| 1426 | func_exit(); |
| 1427 | return -ERESTARTSYS; |
| 1428 | } |
| 1429 | } |
| 1430 | |
| 1431 | /* |
| 1432 | * If non-blocking mode is set, or the port is not enabled, |
| 1433 | * then make the check up front and then exit. |
| 1434 | */ |
| 1435 | if ((filp->f_flags & O_NONBLOCK) || |
| 1436 | (tty->flags & (1 << TTY_IO_ERROR))) { |
| 1437 | port->flags |= ASYNC_NORMAL_ACTIVE; |
| 1438 | func_exit(); |
| 1439 | return 0; |
| 1440 | } |
| 1441 | |
| 1442 | if (C_CLOCAL(tty)) |
| 1443 | do_clocal = 1; |
| 1444 | |
| 1445 | /* |
| 1446 | * Block waiting for the carrier detect and the line to become |
| 1447 | * free (i.e., not in use by the callout). While we are in |
| 1448 | * this loop, info->count is dropped by one, so that |
| 1449 | * rs_close() knows when to free things. We restore it upon |
| 1450 | * exit, either normal or abnormal. |
| 1451 | */ |
| 1452 | retval = 0; |
| 1453 | add_wait_queue(&port->open_wait, &wait); |
| 1454 | spin_lock_irqsave(&port->lock, flags); |
| 1455 | if (!tty_hung_up_p(filp)) { |
| 1456 | port->count--; |
| 1457 | } |
| 1458 | spin_unlock_irqrestore(&port->lock, flags); |
| 1459 | port->blocked_open++; |
| 1460 | while (1) { |
| 1461 | spin_lock_irqsave(&bp->lock, flags); |
| 1462 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1463 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; |
| 1464 | if (SX_CRTSCTS (tty)) { |
| 1465 | /* Activate RTS */ |
| 1466 | port->MSVR |= MSVR_DTR; /* WTF? */ |
| 1467 | sx_out (bp, CD186x_MSVR, port->MSVR); |
| 1468 | } else { |
| 1469 | /* Activate DTR */ |
| 1470 | port->MSVR |= MSVR_DTR; |
| 1471 | sx_out (bp, CD186x_MSVR, port->MSVR); |
| 1472 | } |
| 1473 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1474 | set_current_state(TASK_INTERRUPTIBLE); |
| 1475 | if (tty_hung_up_p(filp) || |
| 1476 | !(port->flags & ASYNC_INITIALIZED)) { |
| 1477 | if (port->flags & ASYNC_HUP_NOTIFY) |
| 1478 | retval = -EAGAIN; |
| 1479 | else |
| 1480 | retval = -ERESTARTSYS; |
| 1481 | break; |
| 1482 | } |
| 1483 | if (!(port->flags & ASYNC_CLOSING) && |
| 1484 | (do_clocal || CD)) |
| 1485 | break; |
| 1486 | if (signal_pending(current)) { |
| 1487 | retval = -ERESTARTSYS; |
| 1488 | break; |
| 1489 | } |
| 1490 | schedule(); |
| 1491 | } |
| 1492 | |
| 1493 | set_current_state(TASK_RUNNING); |
| 1494 | remove_wait_queue(&port->open_wait, &wait); |
| 1495 | spin_lock_irqsave(&port->lock, flags); |
| 1496 | if (!tty_hung_up_p(filp)) { |
| 1497 | port->count++; |
| 1498 | } |
| 1499 | port->blocked_open--; |
| 1500 | spin_unlock_irqrestore(&port->lock, flags); |
| 1501 | if (retval) { |
| 1502 | func_exit(); |
| 1503 | return retval; |
| 1504 | } |
| 1505 | |
| 1506 | port->flags |= ASYNC_NORMAL_ACTIVE; |
| 1507 | func_exit(); |
| 1508 | return 0; |
| 1509 | } |
| 1510 | |
| 1511 | |
| 1512 | static int sx_open(struct tty_struct * tty, struct file * filp) |
| 1513 | { |
| 1514 | int board; |
| 1515 | int error; |
| 1516 | struct specialix_port * port; |
| 1517 | struct specialix_board * bp; |
| 1518 | int i; |
| 1519 | unsigned long flags; |
| 1520 | |
| 1521 | func_enter(); |
| 1522 | |
| 1523 | board = SX_BOARD(tty->index); |
| 1524 | |
| 1525 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { |
| 1526 | func_exit(); |
| 1527 | return -ENODEV; |
| 1528 | } |
| 1529 | |
| 1530 | bp = &sx_board[board]; |
| 1531 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); |
| 1532 | port->overrun = 0; |
| 1533 | for (i = 0; i < 10; i++) |
| 1534 | port->hits[i]=0; |
| 1535 | |
| 1536 | dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n", |
| 1537 | board, bp, port, SX_PORT(tty->index)); |
| 1538 | |
| 1539 | if (sx_paranoia_check(port, tty->name, "sx_open")) { |
| 1540 | func_enter(); |
| 1541 | return -ENODEV; |
| 1542 | } |
| 1543 | |
| 1544 | if ((error = sx_setup_board(bp))) { |
| 1545 | func_exit(); |
| 1546 | return error; |
| 1547 | } |
| 1548 | |
| 1549 | spin_lock_irqsave(&bp->lock, flags); |
| 1550 | port->count++; |
| 1551 | bp->count++; |
| 1552 | tty->driver_data = port; |
| 1553 | port->tty = tty; |
| 1554 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1555 | |
| 1556 | if ((error = sx_setup_port(bp, port))) { |
| 1557 | func_enter(); |
| 1558 | return error; |
| 1559 | } |
| 1560 | |
| 1561 | if ((error = block_til_ready(tty, filp, port))) { |
| 1562 | func_enter(); |
| 1563 | return error; |
| 1564 | } |
| 1565 | |
| 1566 | func_exit(); |
| 1567 | return 0; |
| 1568 | } |
| 1569 | |
| 1570 | |
| 1571 | static void sx_close(struct tty_struct * tty, struct file * filp) |
| 1572 | { |
| 1573 | struct specialix_port *port = (struct specialix_port *) tty->driver_data; |
| 1574 | struct specialix_board *bp; |
| 1575 | unsigned long flags; |
| 1576 | unsigned long timeout; |
| 1577 | |
| 1578 | func_enter(); |
| 1579 | if (!port || sx_paranoia_check(port, tty->name, "close")) { |
| 1580 | func_exit(); |
| 1581 | return; |
| 1582 | } |
| 1583 | spin_lock_irqsave(&port->lock, flags); |
| 1584 | |
| 1585 | if (tty_hung_up_p(filp)) { |
| 1586 | spin_unlock_irqrestore(&port->lock, flags); |
| 1587 | func_exit(); |
| 1588 | return; |
| 1589 | } |
| 1590 | |
| 1591 | bp = port_Board(port); |
| 1592 | if ((tty->count == 1) && (port->count != 1)) { |
| 1593 | printk(KERN_ERR "sx%d: sx_close: bad port count;" |
| 1594 | " tty->count is 1, port count is %d\n", |
| 1595 | board_No(bp), port->count); |
| 1596 | port->count = 1; |
| 1597 | } |
| 1598 | |
| 1599 | if (port->count > 1) { |
| 1600 | port->count--; |
| 1601 | bp->count--; |
| 1602 | |
| 1603 | spin_unlock_irqrestore(&port->lock, flags); |
| 1604 | |
| 1605 | func_exit(); |
| 1606 | return; |
| 1607 | } |
| 1608 | port->flags |= ASYNC_CLOSING; |
| 1609 | /* |
| 1610 | * Now we wait for the transmit buffer to clear; and we notify |
| 1611 | * the line discipline to only process XON/XOFF characters. |
| 1612 | */ |
| 1613 | tty->closing = 1; |
| 1614 | spin_unlock_irqrestore(&port->lock, flags); |
| 1615 | dprintk (SX_DEBUG_OPEN, "Closing\n"); |
| 1616 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { |
| 1617 | tty_wait_until_sent(tty, port->closing_wait); |
| 1618 | } |
| 1619 | /* |
| 1620 | * At this point we stop accepting input. To do this, we |
| 1621 | * disable the receive line status interrupts, and tell the |
| 1622 | * interrupt driver to stop checking the data ready bit in the |
| 1623 | * line status register. |
| 1624 | */ |
| 1625 | dprintk (SX_DEBUG_OPEN, "Closed\n"); |
| 1626 | port->IER &= ~IER_RXD; |
| 1627 | if (port->flags & ASYNC_INITIALIZED) { |
| 1628 | port->IER &= ~IER_TXRDY; |
| 1629 | port->IER |= IER_TXEMPTY; |
| 1630 | spin_lock_irqsave(&bp->lock, flags); |
| 1631 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1632 | sx_out(bp, CD186x_IER, port->IER); |
| 1633 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1634 | /* |
| 1635 | * Before we drop DTR, make sure the UART transmitter |
| 1636 | * has completely drained; this is especially |
| 1637 | * important if there is a transmit FIFO! |
| 1638 | */ |
| 1639 | timeout = jiffies+HZ; |
| 1640 | while(port->IER & IER_TXEMPTY) { |
| 1641 | set_current_state (TASK_INTERRUPTIBLE); |
| 1642 | msleep_interruptible(jiffies_to_msecs(port->timeout)); |
| 1643 | if (time_after(jiffies, timeout)) { |
| 1644 | printk (KERN_INFO "Timeout waiting for close\n"); |
| 1645 | break; |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | } |
| 1650 | |
| 1651 | if (--bp->count < 0) { |
| 1652 | printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", |
| 1653 | board_No(bp), bp->count, tty->index); |
| 1654 | bp->count = 0; |
| 1655 | } |
| 1656 | if (--port->count < 0) { |
| 1657 | printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n", |
| 1658 | board_No(bp), port_No(port), port->count); |
| 1659 | port->count = 0; |
| 1660 | } |
| 1661 | |
| 1662 | sx_shutdown_port(bp, port); |
| 1663 | if (tty->driver->flush_buffer) |
| 1664 | tty->driver->flush_buffer(tty); |
| 1665 | tty_ldisc_flush(tty); |
| 1666 | spin_lock_irqsave(&port->lock, flags); |
| 1667 | tty->closing = 0; |
| 1668 | port->event = 0; |
| 1669 | port->tty = NULL; |
| 1670 | spin_unlock_irqrestore(&port->lock, flags); |
| 1671 | if (port->blocked_open) { |
| 1672 | if (port->close_delay) { |
| 1673 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); |
| 1674 | } |
| 1675 | wake_up_interruptible(&port->open_wait); |
| 1676 | } |
| 1677 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1678 | wake_up_interruptible(&port->close_wait); |
| 1679 | |
| 1680 | func_exit(); |
| 1681 | } |
| 1682 | |
| 1683 | |
| 1684 | static int sx_write(struct tty_struct * tty, |
| 1685 | const unsigned char *buf, int count) |
| 1686 | { |
| 1687 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1688 | struct specialix_board *bp; |
| 1689 | int c, total = 0; |
| 1690 | unsigned long flags; |
| 1691 | |
| 1692 | func_enter(); |
| 1693 | if (sx_paranoia_check(port, tty->name, "sx_write")) { |
| 1694 | func_exit(); |
| 1695 | return 0; |
| 1696 | } |
| 1697 | |
| 1698 | bp = port_Board(port); |
| 1699 | |
| 1700 | if (!tty || !port->xmit_buf || !tmp_buf) { |
| 1701 | func_exit(); |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
| 1705 | while (1) { |
| 1706 | spin_lock_irqsave(&port->lock, flags); |
| 1707 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
| 1708 | SERIAL_XMIT_SIZE - port->xmit_head)); |
| 1709 | if (c <= 0) { |
| 1710 | spin_unlock_irqrestore(&port->lock, flags); |
| 1711 | break; |
| 1712 | } |
| 1713 | memcpy(port->xmit_buf + port->xmit_head, buf, c); |
| 1714 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
| 1715 | port->xmit_cnt += c; |
| 1716 | spin_unlock_irqrestore(&port->lock, flags); |
| 1717 | |
| 1718 | buf += c; |
| 1719 | count -= c; |
| 1720 | total += c; |
| 1721 | } |
| 1722 | |
| 1723 | spin_lock_irqsave(&bp->lock, flags); |
| 1724 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
| 1725 | !(port->IER & IER_TXRDY)) { |
| 1726 | port->IER |= IER_TXRDY; |
| 1727 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1728 | sx_out(bp, CD186x_IER, port->IER); |
| 1729 | } |
| 1730 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1731 | func_exit(); |
| 1732 | |
| 1733 | return total; |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | static void sx_put_char(struct tty_struct * tty, unsigned char ch) |
| 1738 | { |
| 1739 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1740 | unsigned long flags; |
| 1741 | struct specialix_board * bp; |
| 1742 | |
| 1743 | func_enter(); |
| 1744 | |
| 1745 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { |
| 1746 | func_exit(); |
| 1747 | return; |
| 1748 | } |
| 1749 | dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); |
| 1750 | if (!tty || !port->xmit_buf) { |
| 1751 | func_exit(); |
| 1752 | return; |
| 1753 | } |
| 1754 | bp = port_Board(port); |
| 1755 | spin_lock_irqsave(&port->lock, flags); |
| 1756 | |
| 1757 | dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf); |
| 1758 | if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) { |
| 1759 | spin_unlock_irqrestore(&port->lock, flags); |
| 1760 | dprintk (SX_DEBUG_TX, "Exit size\n"); |
| 1761 | func_exit(); |
| 1762 | return; |
| 1763 | } |
| 1764 | dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); |
| 1765 | port->xmit_buf[port->xmit_head++] = ch; |
| 1766 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; |
| 1767 | port->xmit_cnt++; |
| 1768 | spin_unlock_irqrestore(&port->lock, flags); |
| 1769 | |
| 1770 | func_exit(); |
| 1771 | } |
| 1772 | |
| 1773 | |
| 1774 | static void sx_flush_chars(struct tty_struct * tty) |
| 1775 | { |
| 1776 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1777 | unsigned long flags; |
| 1778 | struct specialix_board * bp = port_Board(port); |
| 1779 | |
| 1780 | func_enter(); |
| 1781 | |
| 1782 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { |
| 1783 | func_exit(); |
| 1784 | return; |
| 1785 | } |
| 1786 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
| 1787 | !port->xmit_buf) { |
| 1788 | func_exit(); |
| 1789 | return; |
| 1790 | } |
| 1791 | spin_lock_irqsave(&bp->lock, flags); |
| 1792 | port->IER |= IER_TXRDY; |
| 1793 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); |
| 1794 | sx_out(port_Board(port), CD186x_IER, port->IER); |
| 1795 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1796 | |
| 1797 | func_exit(); |
| 1798 | } |
| 1799 | |
| 1800 | |
| 1801 | static int sx_write_room(struct tty_struct * tty) |
| 1802 | { |
| 1803 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1804 | int ret; |
| 1805 | |
| 1806 | func_enter(); |
| 1807 | |
| 1808 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { |
| 1809 | func_exit(); |
| 1810 | return 0; |
| 1811 | } |
| 1812 | |
| 1813 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
| 1814 | if (ret < 0) |
| 1815 | ret = 0; |
| 1816 | |
| 1817 | func_exit(); |
| 1818 | return ret; |
| 1819 | } |
| 1820 | |
| 1821 | |
| 1822 | static int sx_chars_in_buffer(struct tty_struct *tty) |
| 1823 | { |
| 1824 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1825 | |
| 1826 | func_enter(); |
| 1827 | |
| 1828 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { |
| 1829 | func_exit(); |
| 1830 | return 0; |
| 1831 | } |
| 1832 | func_exit(); |
| 1833 | return port->xmit_cnt; |
| 1834 | } |
| 1835 | |
| 1836 | |
| 1837 | static void sx_flush_buffer(struct tty_struct *tty) |
| 1838 | { |
| 1839 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1840 | unsigned long flags; |
| 1841 | struct specialix_board * bp; |
| 1842 | |
| 1843 | func_enter(); |
| 1844 | |
| 1845 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { |
| 1846 | func_exit(); |
| 1847 | return; |
| 1848 | } |
| 1849 | |
| 1850 | bp = port_Board(port); |
| 1851 | spin_lock_irqsave(&port->lock, flags); |
| 1852 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| 1853 | spin_unlock_irqrestore(&port->lock, flags); |
| 1854 | tty_wakeup(tty); |
| 1855 | |
| 1856 | func_exit(); |
| 1857 | } |
| 1858 | |
| 1859 | |
| 1860 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) |
| 1861 | { |
| 1862 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1863 | struct specialix_board * bp; |
| 1864 | unsigned char status; |
| 1865 | unsigned int result; |
| 1866 | unsigned long flags; |
| 1867 | |
| 1868 | func_enter(); |
| 1869 | |
| 1870 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { |
| 1871 | func_exit(); |
| 1872 | return -ENODEV; |
| 1873 | } |
| 1874 | |
| 1875 | bp = port_Board(port); |
| 1876 | spin_lock_irqsave (&bp->lock, flags); |
| 1877 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1878 | status = sx_in(bp, CD186x_MSVR); |
| 1879 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1880 | dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", |
| 1881 | port_No(port), status, sx_in (bp, CD186x_CAR)); |
| 1882 | dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); |
| 1883 | if (SX_CRTSCTS(port->tty)) { |
| 1884 | result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */ |
| 1885 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) |
| 1886 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) |
| 1887 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ |
| 1888 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
| 1889 | } else { |
| 1890 | result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */ |
| 1891 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
| 1892 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) |
| 1893 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ |
| 1894 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
| 1895 | } |
| 1896 | |
| 1897 | func_exit(); |
| 1898 | |
| 1899 | return result; |
| 1900 | } |
| 1901 | |
| 1902 | |
| 1903 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, |
| 1904 | unsigned int set, unsigned int clear) |
| 1905 | { |
| 1906 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1907 | unsigned long flags; |
| 1908 | struct specialix_board *bp; |
| 1909 | |
| 1910 | func_enter(); |
| 1911 | |
| 1912 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { |
| 1913 | func_exit(); |
| 1914 | return -ENODEV; |
| 1915 | } |
| 1916 | |
| 1917 | bp = port_Board(port); |
| 1918 | |
| 1919 | spin_lock_irqsave(&port->lock, flags); |
| 1920 | /* if (set & TIOCM_RTS) |
| 1921 | port->MSVR |= MSVR_RTS; */ |
| 1922 | /* if (set & TIOCM_DTR) |
| 1923 | port->MSVR |= MSVR_DTR; */ |
| 1924 | |
| 1925 | if (SX_CRTSCTS(port->tty)) { |
| 1926 | if (set & TIOCM_RTS) |
| 1927 | port->MSVR |= MSVR_DTR; |
| 1928 | } else { |
| 1929 | if (set & TIOCM_DTR) |
| 1930 | port->MSVR |= MSVR_DTR; |
| 1931 | } |
| 1932 | |
| 1933 | /* if (clear & TIOCM_RTS) |
| 1934 | port->MSVR &= ~MSVR_RTS; */ |
| 1935 | /* if (clear & TIOCM_DTR) |
| 1936 | port->MSVR &= ~MSVR_DTR; */ |
| 1937 | if (SX_CRTSCTS(port->tty)) { |
| 1938 | if (clear & TIOCM_RTS) |
| 1939 | port->MSVR &= ~MSVR_DTR; |
| 1940 | } else { |
| 1941 | if (clear & TIOCM_DTR) |
| 1942 | port->MSVR &= ~MSVR_DTR; |
| 1943 | } |
| 1944 | spin_lock_irqsave(&bp->lock, flags); |
| 1945 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1946 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 1947 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1948 | spin_unlock_irqrestore(&port->lock, flags); |
| 1949 | func_exit(); |
| 1950 | return 0; |
| 1951 | } |
| 1952 | |
| 1953 | |
| 1954 | static inline void sx_send_break(struct specialix_port * port, unsigned long length) |
| 1955 | { |
| 1956 | struct specialix_board *bp = port_Board(port); |
| 1957 | unsigned long flags; |
| 1958 | |
| 1959 | func_enter(); |
| 1960 | |
| 1961 | spin_lock_irqsave (&port->lock, flags); |
| 1962 | port->break_length = SPECIALIX_TPS / HZ * length; |
| 1963 | port->COR2 |= COR2_ETC; |
| 1964 | port->IER |= IER_TXRDY; |
| 1965 | spin_lock_irqsave(&bp->lock, flags); |
| 1966 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1967 | sx_out(bp, CD186x_COR2, port->COR2); |
| 1968 | sx_out(bp, CD186x_IER, port->IER); |
| 1969 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1970 | spin_unlock_irqrestore (&port->lock, flags); |
| 1971 | sx_wait_CCR(bp); |
| 1972 | spin_lock_irqsave(&bp->lock, flags); |
| 1973 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); |
| 1974 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1975 | sx_wait_CCR(bp); |
| 1976 | |
| 1977 | func_exit(); |
| 1978 | } |
| 1979 | |
| 1980 | |
| 1981 | static inline int sx_set_serial_info(struct specialix_port * port, |
| 1982 | struct serial_struct __user * newinfo) |
| 1983 | { |
| 1984 | struct serial_struct tmp; |
| 1985 | struct specialix_board *bp = port_Board(port); |
| 1986 | int change_speed; |
| 1987 | |
| 1988 | func_enter(); |
| 1989 | /* |
| 1990 | error = verify_area(VERIFY_READ, (void *) newinfo, sizeof(tmp)); |
| 1991 | if (error) { |
| 1992 | func_exit(); |
| 1993 | return error; |
| 1994 | } |
| 1995 | */ |
| 1996 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { |
| 1997 | func_enter(); |
| 1998 | return -EFAULT; |
| 1999 | } |
| 2000 | |
| 2001 | #if 0 |
| 2002 | if ((tmp.irq != bp->irq) || |
| 2003 | (tmp.port != bp->base) || |
| 2004 | (tmp.type != PORT_CIRRUS) || |
| 2005 | (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) || |
| 2006 | (tmp.custom_divisor != 0) || |
| 2007 | (tmp.xmit_fifo_size != CD186x_NFIFO) || |
| 2008 | (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) { |
| 2009 | func_exit(); |
| 2010 | return -EINVAL; |
| 2011 | } |
| 2012 | #endif |
| 2013 | |
| 2014 | change_speed = ((port->flags & ASYNC_SPD_MASK) != |
| 2015 | (tmp.flags & ASYNC_SPD_MASK)); |
| 2016 | change_speed |= (tmp.custom_divisor != port->custom_divisor); |
| 2017 | |
| 2018 | if (!capable(CAP_SYS_ADMIN)) { |
| 2019 | if ((tmp.close_delay != port->close_delay) || |
| 2020 | (tmp.closing_wait != port->closing_wait) || |
| 2021 | ((tmp.flags & ~ASYNC_USR_MASK) != |
| 2022 | (port->flags & ~ASYNC_USR_MASK))) { |
| 2023 | func_exit(); |
| 2024 | return -EPERM; |
| 2025 | } |
| 2026 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | |
| 2027 | (tmp.flags & ASYNC_USR_MASK)); |
| 2028 | port->custom_divisor = tmp.custom_divisor; |
| 2029 | } else { |
| 2030 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
| 2031 | (tmp.flags & ASYNC_FLAGS)); |
| 2032 | port->close_delay = tmp.close_delay; |
| 2033 | port->closing_wait = tmp.closing_wait; |
| 2034 | port->custom_divisor = tmp.custom_divisor; |
| 2035 | } |
| 2036 | if (change_speed) { |
| 2037 | sx_change_speed(bp, port); |
| 2038 | } |
| 2039 | func_exit(); |
| 2040 | return 0; |
| 2041 | } |
| 2042 | |
| 2043 | |
| 2044 | static inline int sx_get_serial_info(struct specialix_port * port, |
| 2045 | struct serial_struct __user *retinfo) |
| 2046 | { |
| 2047 | struct serial_struct tmp; |
| 2048 | struct specialix_board *bp = port_Board(port); |
| 2049 | // int error; |
| 2050 | |
| 2051 | func_enter(); |
| 2052 | |
| 2053 | /* |
| 2054 | error = verify_area(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)); |
| 2055 | if (error) |
| 2056 | return error; |
| 2057 | */ |
| 2058 | |
| 2059 | memset(&tmp, 0, sizeof(tmp)); |
| 2060 | tmp.type = PORT_CIRRUS; |
| 2061 | tmp.line = port - sx_port; |
| 2062 | tmp.port = bp->base; |
| 2063 | tmp.irq = bp->irq; |
| 2064 | tmp.flags = port->flags; |
| 2065 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; |
| 2066 | tmp.close_delay = port->close_delay * HZ/100; |
| 2067 | tmp.closing_wait = port->closing_wait * HZ/100; |
| 2068 | tmp.custom_divisor = port->custom_divisor; |
| 2069 | tmp.xmit_fifo_size = CD186x_NFIFO; |
| 2070 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { |
| 2071 | func_exit(); |
| 2072 | return -EFAULT; |
| 2073 | } |
| 2074 | |
| 2075 | func_exit(); |
| 2076 | return 0; |
| 2077 | } |
| 2078 | |
| 2079 | |
| 2080 | static int sx_ioctl(struct tty_struct * tty, struct file * filp, |
| 2081 | unsigned int cmd, unsigned long arg) |
| 2082 | { |
| 2083 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2084 | int retval; |
| 2085 | void __user *argp = (void __user *)arg; |
| 2086 | |
| 2087 | func_enter(); |
| 2088 | |
| 2089 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { |
| 2090 | func_exit(); |
| 2091 | return -ENODEV; |
| 2092 | } |
| 2093 | |
| 2094 | switch (cmd) { |
| 2095 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
| 2096 | retval = tty_check_change(tty); |
| 2097 | if (retval) { |
| 2098 | func_exit(); |
| 2099 | return retval; |
| 2100 | } |
| 2101 | tty_wait_until_sent(tty, 0); |
| 2102 | if (!arg) |
| 2103 | sx_send_break(port, HZ/4); /* 1/4 second */ |
| 2104 | return 0; |
| 2105 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
| 2106 | retval = tty_check_change(tty); |
| 2107 | if (retval) { |
| 2108 | func_exit(); |
| 2109 | return retval; |
| 2110 | } |
| 2111 | tty_wait_until_sent(tty, 0); |
| 2112 | sx_send_break(port, arg ? arg*(HZ/10) : HZ/4); |
| 2113 | func_exit(); |
| 2114 | return 0; |
| 2115 | case TIOCGSOFTCAR: |
| 2116 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) { |
| 2117 | func_exit(); |
| 2118 | return -EFAULT; |
| 2119 | } |
| 2120 | func_exit(); |
| 2121 | return 0; |
| 2122 | case TIOCSSOFTCAR: |
| 2123 | if (get_user(arg, (unsigned long __user *) argp)) { |
| 2124 | func_exit(); |
| 2125 | return -EFAULT; |
| 2126 | } |
| 2127 | tty->termios->c_cflag = |
| 2128 | ((tty->termios->c_cflag & ~CLOCAL) | |
| 2129 | (arg ? CLOCAL : 0)); |
| 2130 | func_exit(); |
| 2131 | return 0; |
| 2132 | case TIOCGSERIAL: |
| 2133 | func_exit(); |
| 2134 | return sx_get_serial_info(port, argp); |
| 2135 | case TIOCSSERIAL: |
| 2136 | func_exit(); |
| 2137 | return sx_set_serial_info(port, argp); |
| 2138 | default: |
| 2139 | func_exit(); |
| 2140 | return -ENOIOCTLCMD; |
| 2141 | } |
| 2142 | func_exit(); |
| 2143 | return 0; |
| 2144 | } |
| 2145 | |
| 2146 | |
| 2147 | static void sx_throttle(struct tty_struct * tty) |
| 2148 | { |
| 2149 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2150 | struct specialix_board *bp; |
| 2151 | unsigned long flags; |
| 2152 | |
| 2153 | func_enter(); |
| 2154 | |
| 2155 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { |
| 2156 | func_exit(); |
| 2157 | return; |
| 2158 | } |
| 2159 | |
| 2160 | bp = port_Board(port); |
| 2161 | |
| 2162 | /* Use DTR instead of RTS ! */ |
| 2163 | if (SX_CRTSCTS (tty)) |
| 2164 | port->MSVR &= ~MSVR_DTR; |
| 2165 | else { |
| 2166 | /* Auch!!! I think the system shouldn't call this then. */ |
| 2167 | /* Or maybe we're supposed (allowed?) to do our side of hw |
| 2168 | handshake anyway, even when hardware handshake is off. |
| 2169 | When you see this in your logs, please report.... */ |
| 2170 | printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n", |
| 2171 | port_No (port)); |
| 2172 | } |
| 2173 | spin_lock_irqsave(&bp->lock, flags); |
| 2174 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2175 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2176 | if (I_IXOFF(tty)) { |
| 2177 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2178 | sx_wait_CCR(bp); |
| 2179 | spin_lock_irqsave(&bp->lock, flags); |
| 2180 | sx_out(bp, CD186x_CCR, CCR_SSCH2); |
| 2181 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2182 | sx_wait_CCR(bp); |
| 2183 | } |
| 2184 | spin_lock_irqsave(&bp->lock, flags); |
| 2185 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 2186 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2187 | |
| 2188 | func_exit(); |
| 2189 | } |
| 2190 | |
| 2191 | |
| 2192 | static void sx_unthrottle(struct tty_struct * tty) |
| 2193 | { |
| 2194 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2195 | struct specialix_board *bp; |
| 2196 | unsigned long flags; |
| 2197 | |
| 2198 | func_enter(); |
| 2199 | |
| 2200 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { |
| 2201 | func_exit(); |
| 2202 | return; |
| 2203 | } |
| 2204 | |
| 2205 | bp = port_Board(port); |
| 2206 | |
| 2207 | spin_lock_irqsave(&port->lock, flags); |
| 2208 | /* XXXX Use DTR INSTEAD???? */ |
| 2209 | if (SX_CRTSCTS(tty)) { |
| 2210 | port->MSVR |= MSVR_DTR; |
| 2211 | } /* Else clause: see remark in "sx_throttle"... */ |
| 2212 | spin_lock_irqsave(&bp->lock, flags); |
| 2213 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2214 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2215 | if (I_IXOFF(tty)) { |
| 2216 | spin_unlock_irqrestore(&port->lock, flags); |
| 2217 | sx_wait_CCR(bp); |
| 2218 | spin_lock_irqsave(&bp->lock, flags); |
| 2219 | sx_out(bp, CD186x_CCR, CCR_SSCH1); |
| 2220 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2221 | sx_wait_CCR(bp); |
| 2222 | spin_lock_irqsave(&port->lock, flags); |
| 2223 | } |
| 2224 | spin_lock_irqsave(&bp->lock, flags); |
| 2225 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 2226 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2227 | spin_unlock_irqrestore(&port->lock, flags); |
| 2228 | |
| 2229 | func_exit(); |
| 2230 | } |
| 2231 | |
| 2232 | |
| 2233 | static void sx_stop(struct tty_struct * tty) |
| 2234 | { |
| 2235 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2236 | struct specialix_board *bp; |
| 2237 | unsigned long flags; |
| 2238 | |
| 2239 | func_enter(); |
| 2240 | |
| 2241 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { |
| 2242 | func_exit(); |
| 2243 | return; |
| 2244 | } |
| 2245 | |
| 2246 | bp = port_Board(port); |
| 2247 | |
| 2248 | spin_lock_irqsave(&port->lock, flags); |
| 2249 | port->IER &= ~IER_TXRDY; |
| 2250 | spin_lock_irqsave(&bp->lock, flags); |
| 2251 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2252 | sx_out(bp, CD186x_IER, port->IER); |
| 2253 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2254 | spin_unlock_irqrestore(&port->lock, flags); |
| 2255 | |
| 2256 | func_exit(); |
| 2257 | } |
| 2258 | |
| 2259 | |
| 2260 | static void sx_start(struct tty_struct * tty) |
| 2261 | { |
| 2262 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2263 | struct specialix_board *bp; |
| 2264 | unsigned long flags; |
| 2265 | |
| 2266 | func_enter(); |
| 2267 | |
| 2268 | if (sx_paranoia_check(port, tty->name, "sx_start")) { |
| 2269 | func_exit(); |
| 2270 | return; |
| 2271 | } |
| 2272 | |
| 2273 | bp = port_Board(port); |
| 2274 | |
| 2275 | spin_lock_irqsave(&port->lock, flags); |
| 2276 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { |
| 2277 | port->IER |= IER_TXRDY; |
| 2278 | spin_lock_irqsave(&bp->lock, flags); |
| 2279 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2280 | sx_out(bp, CD186x_IER, port->IER); |
| 2281 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2282 | } |
| 2283 | spin_unlock_irqrestore(&port->lock, flags); |
| 2284 | |
| 2285 | func_exit(); |
| 2286 | } |
| 2287 | |
| 2288 | |
| 2289 | /* |
| 2290 | * This routine is called from the work-queue when the interrupt |
| 2291 | * routine has signalled that a hangup has occurred. The path of |
| 2292 | * hangup processing is: |
| 2293 | * |
| 2294 | * serial interrupt routine -> (workqueue) -> |
| 2295 | * do_sx_hangup() -> tty->hangup() -> sx_hangup() |
| 2296 | * |
| 2297 | */ |
| 2298 | static void do_sx_hangup(void *private_) |
| 2299 | { |
| 2300 | struct specialix_port *port = (struct specialix_port *) private_; |
| 2301 | struct tty_struct *tty; |
| 2302 | |
| 2303 | func_enter(); |
| 2304 | |
| 2305 | tty = port->tty; |
| 2306 | if (tty) |
| 2307 | tty_hangup(tty); /* FIXME: module removal race here */ |
| 2308 | |
| 2309 | func_exit(); |
| 2310 | } |
| 2311 | |
| 2312 | |
| 2313 | static void sx_hangup(struct tty_struct * tty) |
| 2314 | { |
| 2315 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2316 | struct specialix_board *bp; |
| 2317 | unsigned long flags; |
| 2318 | |
| 2319 | func_enter(); |
| 2320 | |
| 2321 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { |
| 2322 | func_exit(); |
| 2323 | return; |
| 2324 | } |
| 2325 | |
| 2326 | bp = port_Board(port); |
| 2327 | |
| 2328 | sx_shutdown_port(bp, port); |
| 2329 | spin_lock_irqsave(&port->lock, flags); |
| 2330 | port->event = 0; |
| 2331 | bp->count -= port->count; |
| 2332 | if (bp->count < 0) { |
| 2333 | printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n", |
| 2334 | board_No(bp), bp->count, tty->index); |
| 2335 | bp->count = 0; |
| 2336 | } |
| 2337 | port->count = 0; |
| 2338 | port->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 2339 | port->tty = NULL; |
| 2340 | spin_unlock_irqrestore(&port->lock, flags); |
| 2341 | wake_up_interruptible(&port->open_wait); |
| 2342 | |
| 2343 | func_exit(); |
| 2344 | } |
| 2345 | |
| 2346 | |
| 2347 | static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios) |
| 2348 | { |
| 2349 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2350 | unsigned long flags; |
| 2351 | struct specialix_board * bp; |
| 2352 | |
| 2353 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) |
| 2354 | return; |
| 2355 | |
| 2356 | if (tty->termios->c_cflag == old_termios->c_cflag && |
| 2357 | tty->termios->c_iflag == old_termios->c_iflag) |
| 2358 | return; |
| 2359 | |
| 2360 | bp = port_Board(port); |
| 2361 | spin_lock_irqsave(&port->lock, flags); |
| 2362 | sx_change_speed(port_Board(port), port); |
| 2363 | spin_unlock_irqrestore(&port->lock, flags); |
| 2364 | |
| 2365 | if ((old_termios->c_cflag & CRTSCTS) && |
| 2366 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 2367 | tty->hw_stopped = 0; |
| 2368 | sx_start(tty); |
| 2369 | } |
| 2370 | } |
| 2371 | |
| 2372 | |
| 2373 | static void do_softint(void *private_) |
| 2374 | { |
| 2375 | struct specialix_port *port = (struct specialix_port *) private_; |
| 2376 | struct tty_struct *tty; |
| 2377 | |
| 2378 | func_enter(); |
| 2379 | |
| 2380 | if(!(tty = port->tty)) { |
| 2381 | func_exit(); |
| 2382 | return; |
| 2383 | } |
| 2384 | |
| 2385 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { |
| 2386 | tty_wakeup(tty); |
| 2387 | //wake_up_interruptible(&tty->write_wait); |
| 2388 | } |
| 2389 | |
| 2390 | func_exit(); |
| 2391 | } |
| 2392 | |
| 2393 | static struct tty_operations sx_ops = { |
| 2394 | .open = sx_open, |
| 2395 | .close = sx_close, |
| 2396 | .write = sx_write, |
| 2397 | .put_char = sx_put_char, |
| 2398 | .flush_chars = sx_flush_chars, |
| 2399 | .write_room = sx_write_room, |
| 2400 | .chars_in_buffer = sx_chars_in_buffer, |
| 2401 | .flush_buffer = sx_flush_buffer, |
| 2402 | .ioctl = sx_ioctl, |
| 2403 | .throttle = sx_throttle, |
| 2404 | .unthrottle = sx_unthrottle, |
| 2405 | .set_termios = sx_set_termios, |
| 2406 | .stop = sx_stop, |
| 2407 | .start = sx_start, |
| 2408 | .hangup = sx_hangup, |
| 2409 | .tiocmget = sx_tiocmget, |
| 2410 | .tiocmset = sx_tiocmset, |
| 2411 | }; |
| 2412 | |
| 2413 | static int sx_init_drivers(void) |
| 2414 | { |
| 2415 | int error; |
| 2416 | int i; |
| 2417 | |
| 2418 | func_enter(); |
| 2419 | |
| 2420 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); |
| 2421 | if (!specialix_driver) { |
| 2422 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); |
| 2423 | func_exit(); |
| 2424 | return 1; |
| 2425 | } |
| 2426 | |
| 2427 | if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) { |
| 2428 | printk(KERN_ERR "sx: Couldn't get free page.\n"); |
| 2429 | put_tty_driver(specialix_driver); |
| 2430 | func_exit(); |
| 2431 | return 1; |
| 2432 | } |
| 2433 | specialix_driver->owner = THIS_MODULE; |
| 2434 | specialix_driver->name = "ttyW"; |
| 2435 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; |
| 2436 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2437 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2438 | specialix_driver->init_termios = tty_std_termios; |
| 2439 | specialix_driver->init_termios.c_cflag = |
| 2440 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 2441 | specialix_driver->flags = TTY_DRIVER_REAL_RAW; |
| 2442 | tty_set_operations(specialix_driver, &sx_ops); |
| 2443 | |
| 2444 | if ((error = tty_register_driver(specialix_driver))) { |
| 2445 | put_tty_driver(specialix_driver); |
| 2446 | free_page((unsigned long)tmp_buf); |
| 2447 | printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n", |
| 2448 | error); |
| 2449 | func_exit(); |
| 2450 | return 1; |
| 2451 | } |
| 2452 | memset(sx_port, 0, sizeof(sx_port)); |
| 2453 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { |
| 2454 | sx_port[i].magic = SPECIALIX_MAGIC; |
| 2455 | INIT_WORK(&sx_port[i].tqueue, do_softint, &sx_port[i]); |
| 2456 | INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup, &sx_port[i]); |
| 2457 | sx_port[i].close_delay = 50 * HZ/100; |
| 2458 | sx_port[i].closing_wait = 3000 * HZ/100; |
| 2459 | init_waitqueue_head(&sx_port[i].open_wait); |
| 2460 | init_waitqueue_head(&sx_port[i].close_wait); |
| 2461 | spin_lock_init(&sx_port[i].lock); |
| 2462 | } |
| 2463 | |
| 2464 | func_exit(); |
| 2465 | return 0; |
| 2466 | } |
| 2467 | |
| 2468 | static void sx_release_drivers(void) |
| 2469 | { |
| 2470 | func_enter(); |
| 2471 | |
| 2472 | free_page((unsigned long)tmp_buf); |
| 2473 | tty_unregister_driver(specialix_driver); |
| 2474 | put_tty_driver(specialix_driver); |
| 2475 | func_exit(); |
| 2476 | } |
| 2477 | |
| 2478 | /* |
| 2479 | * This routine must be called by kernel at boot time |
| 2480 | */ |
| 2481 | static int __init specialix_init(void) |
| 2482 | { |
| 2483 | int i; |
| 2484 | int found = 0; |
| 2485 | |
| 2486 | func_enter(); |
| 2487 | |
| 2488 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); |
| 2489 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); |
| 2490 | #ifdef CONFIG_SPECIALIX_RTSCTS |
| 2491 | printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); |
| 2492 | #else |
| 2493 | printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); |
| 2494 | #endif |
| 2495 | |
| 2496 | for (i = 0; i < SX_NBOARD; i++) |
| 2497 | sx_board[i].lock = SPIN_LOCK_UNLOCKED; |
| 2498 | |
| 2499 | if (sx_init_drivers()) { |
| 2500 | func_exit(); |
| 2501 | return -EIO; |
| 2502 | } |
| 2503 | |
| 2504 | for (i = 0; i < SX_NBOARD; i++) |
| 2505 | if (sx_board[i].base && !sx_probe(&sx_board[i])) |
| 2506 | found++; |
| 2507 | |
| 2508 | #ifdef CONFIG_PCI |
| 2509 | { |
| 2510 | struct pci_dev *pdev = NULL; |
| 2511 | |
| 2512 | i=0; |
| 2513 | while (i < SX_NBOARD) { |
| 2514 | if (sx_board[i].flags & SX_BOARD_PRESENT) { |
| 2515 | i++; |
| 2516 | continue; |
| 2517 | } |
| 2518 | pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, |
| 2519 | PCI_DEVICE_ID_SPECIALIX_IO8, |
| 2520 | pdev); |
| 2521 | if (!pdev) break; |
| 2522 | |
| 2523 | if (pci_enable_device(pdev)) |
| 2524 | continue; |
| 2525 | |
| 2526 | sx_board[i].irq = pdev->irq; |
| 2527 | |
| 2528 | sx_board[i].base = pci_resource_start (pdev, 2); |
| 2529 | |
| 2530 | sx_board[i].flags |= SX_BOARD_IS_PCI; |
| 2531 | if (!sx_probe(&sx_board[i])) |
| 2532 | found ++; |
| 2533 | } |
| 2534 | } |
| 2535 | #endif |
| 2536 | |
| 2537 | if (!found) { |
| 2538 | sx_release_drivers(); |
| 2539 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); |
| 2540 | func_exit(); |
| 2541 | return -EIO; |
| 2542 | } |
| 2543 | |
| 2544 | func_exit(); |
| 2545 | return 0; |
| 2546 | } |
| 2547 | |
| 2548 | static int iobase[SX_NBOARD] = {0,}; |
| 2549 | |
| 2550 | static int irq [SX_NBOARD] = {0,}; |
| 2551 | |
| 2552 | module_param_array(iobase, int, NULL, 0); |
| 2553 | module_param_array(irq, int, NULL, 0); |
| 2554 | module_param(sx_debug, int, 0); |
| 2555 | module_param(sx_rxfifo, int, 0); |
| 2556 | #ifdef SPECIALIX_TIMER |
| 2557 | module_param(sx_poll, int, 0); |
| 2558 | #endif |
| 2559 | |
| 2560 | /* |
| 2561 | * You can setup up to 4 boards. |
| 2562 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. |
| 2563 | * You should specify the IRQs too in that case "irq=....,...". |
| 2564 | * |
| 2565 | * More than 4 boards in one computer is not possible, as the card can |
| 2566 | * only use 4 different interrupts. |
| 2567 | * |
| 2568 | */ |
| 2569 | static int __init specialix_init_module(void) |
| 2570 | { |
| 2571 | int i; |
| 2572 | |
| 2573 | func_enter(); |
| 2574 | |
| 2575 | init_MUTEX(&tmp_buf_sem); /* Init de the semaphore - pvdl */ |
| 2576 | |
| 2577 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { |
| 2578 | for(i = 0; i < SX_NBOARD; i++) { |
| 2579 | sx_board[i].base = iobase[i]; |
| 2580 | sx_board[i].irq = irq[i]; |
| 2581 | sx_board[i].count= 0; |
| 2582 | } |
| 2583 | } |
| 2584 | |
| 2585 | func_exit(); |
| 2586 | |
| 2587 | return specialix_init(); |
| 2588 | } |
| 2589 | |
| 2590 | static void __exit specialix_exit_module(void) |
| 2591 | { |
| 2592 | int i; |
| 2593 | |
| 2594 | func_enter(); |
| 2595 | |
| 2596 | sx_release_drivers(); |
| 2597 | for (i = 0; i < SX_NBOARD; i++) |
| 2598 | if (sx_board[i].flags & SX_BOARD_PRESENT) |
| 2599 | sx_release_io_range(&sx_board[i]); |
| 2600 | #ifdef SPECIALIX_TIMER |
| 2601 | del_timer (&missed_irq_timer); |
| 2602 | #endif |
| 2603 | |
| 2604 | func_exit(); |
| 2605 | } |
| 2606 | |
| 2607 | module_init(specialix_init_module); |
| 2608 | module_exit(specialix_exit_module); |
| 2609 | |
| 2610 | MODULE_LICENSE("GPL"); |