Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* linux/drivers/cdrom/optcd.c - Optics Storage 8000 AT CDROM driver |
| 2 | $Id: optcd.c,v 1.11 1997/01/26 07:13:00 davem Exp $ |
| 3 | |
| 4 | Copyright (C) 1995 Leo Spiekman (spiekman@dutette.et.tudelft.nl) |
| 5 | |
| 6 | |
| 7 | Based on Aztech CD268 CDROM driver by Werner Zimmermann and preworks |
| 8 | by Eberhard Moenkeberg (emoenke@gwdg.de). |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2, or (at your option) |
| 13 | any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
| 25 | /* Revision history |
| 26 | |
| 27 | |
| 28 | 14-5-95 v0.0 Plays sound tracks. No reading of data CDs yet. |
| 29 | Detection of disk change doesn't work. |
| 30 | 21-5-95 v0.1 First ALPHA version. CD can be mounted. The |
| 31 | device major nr is borrowed from the Aztech |
| 32 | driver. Speed is around 240 kb/s, as measured |
| 33 | with "time dd if=/dev/cdrom of=/dev/null \ |
| 34 | bs=2048 count=4096". |
| 35 | 24-6-95 v0.2 Reworked the #defines for the command codes |
| 36 | and the like, as well as the structure of |
| 37 | the hardware communication protocol, to |
| 38 | reflect the "official" documentation, kindly |
| 39 | supplied by C.K. Tan, Optics Storage Pte. Ltd. |
| 40 | Also tidied up the state machine somewhat. |
| 41 | 28-6-95 v0.3 Removed the ISP-16 interface code, as this |
| 42 | should go into its own driver. The driver now |
| 43 | has its own major nr. |
| 44 | Disk change detection now seems to work, too. |
| 45 | This version became part of the standard |
| 46 | kernel as of version 1.3.7 |
| 47 | 24-9-95 v0.4 Re-inserted ISP-16 interface code which I |
| 48 | copied from sjcd.c, with a few changes. |
| 49 | Updated README.optcd. Submitted for |
| 50 | inclusion in 1.3.21 |
| 51 | 29-9-95 v0.4a Fixed bug that prevented compilation as module |
| 52 | 25-10-95 v0.5 Started multisession code. Implementation |
| 53 | copied from Werner Zimmermann, who copied it |
| 54 | from Heiko Schlittermann's mcdx. |
| 55 | 17-1-96 v0.6 Multisession works; some cleanup too. |
| 56 | 18-4-96 v0.7 Increased some timing constants; |
| 57 | thanks to Luke McFarlane. Also tidied up some |
| 58 | printk behaviour. ISP16 initialization |
| 59 | is now handled by a separate driver. |
| 60 | |
| 61 | 09-11-99 Make kernel-parameter implementation work with 2.3.x |
| 62 | Removed init_module & cleanup_module in favor of |
| 63 | module_init & module_exit. |
| 64 | Torben Mathiasen <tmm@image.dk> |
| 65 | */ |
| 66 | |
| 67 | /* Includes */ |
| 68 | |
| 69 | |
| 70 | #include <linux/module.h> |
| 71 | #include <linux/mm.h> |
| 72 | #include <linux/ioport.h> |
| 73 | #include <linux/init.h> |
| 74 | |
| 75 | #include <asm/io.h> |
| 76 | #include <linux/blkdev.h> |
| 77 | |
| 78 | #include <linux/cdrom.h> |
| 79 | #include "optcd.h" |
| 80 | |
| 81 | #include <asm/uaccess.h> |
| 82 | |
| 83 | #define MAJOR_NR OPTICS_CDROM_MAJOR |
| 84 | #define QUEUE (opt_queue) |
| 85 | #define CURRENT elv_next_request(opt_queue) |
| 86 | |
| 87 | |
| 88 | /* Debug support */ |
| 89 | |
| 90 | |
| 91 | /* Don't forget to add new debug flags here. */ |
| 92 | #if DEBUG_DRIVE_IF | DEBUG_VFS | DEBUG_CONV | DEBUG_TOC | \ |
| 93 | DEBUG_BUFFERS | DEBUG_REQUEST | DEBUG_STATE | DEBUG_MULTIS |
| 94 | #define DEBUG(x) debug x |
| 95 | static void debug(int debug_this, const char* fmt, ...) |
| 96 | { |
| 97 | char s[1024]; |
| 98 | va_list args; |
| 99 | |
| 100 | if (!debug_this) |
| 101 | return; |
| 102 | |
| 103 | va_start(args, fmt); |
| 104 | vsprintf(s, fmt, args); |
| 105 | printk(KERN_DEBUG "optcd: %s\n", s); |
| 106 | va_end(args); |
| 107 | } |
| 108 | #else |
| 109 | #define DEBUG(x) |
| 110 | #endif |
| 111 | |
| 112 | |
| 113 | /* Drive hardware/firmware characteristics |
| 114 | Identifiers in accordance with Optics Storage documentation */ |
| 115 | |
| 116 | |
| 117 | #define optcd_port optcd /* Needed for the modutils. */ |
| 118 | static short optcd_port = OPTCD_PORTBASE; /* I/O base of drive. */ |
| 119 | module_param(optcd_port, short, 0); |
| 120 | /* Drive registers, read */ |
| 121 | #define DATA_PORT optcd_port /* Read data/status */ |
| 122 | #define STATUS_PORT optcd_port+1 /* Indicate data/status availability */ |
| 123 | |
| 124 | /* Drive registers, write */ |
| 125 | #define COMIN_PORT optcd_port /* For passing command/parameter */ |
| 126 | #define RESET_PORT optcd_port+1 /* Write anything and wait 0.5 sec */ |
| 127 | #define HCON_PORT optcd_port+2 /* Host Xfer Configuration */ |
| 128 | |
| 129 | |
| 130 | /* Command completion/status read from DATA register */ |
| 131 | #define ST_DRVERR 0x80 |
| 132 | #define ST_DOOR_OPEN 0x40 |
| 133 | #define ST_MIXEDMODE_DISK 0x20 |
| 134 | #define ST_MODE_BITS 0x1c |
| 135 | #define ST_M_STOP 0x00 |
| 136 | #define ST_M_READ 0x04 |
| 137 | #define ST_M_AUDIO 0x04 |
| 138 | #define ST_M_PAUSE 0x08 |
| 139 | #define ST_M_INITIAL 0x0c |
| 140 | #define ST_M_ERROR 0x10 |
| 141 | #define ST_M_OTHERS 0x14 |
| 142 | #define ST_MODE2TRACK 0x02 |
| 143 | #define ST_DSK_CHG 0x01 |
| 144 | #define ST_L_LOCK 0x01 |
| 145 | #define ST_CMD_OK 0x00 |
| 146 | #define ST_OP_OK 0x01 |
| 147 | #define ST_PA_OK 0x02 |
| 148 | #define ST_OP_ERROR 0x05 |
| 149 | #define ST_PA_ERROR 0x06 |
| 150 | |
| 151 | |
| 152 | /* Error codes (appear as command completion code from DATA register) */ |
| 153 | /* Player related errors */ |
| 154 | #define ERR_ILLCMD 0x11 /* Illegal command to player module */ |
| 155 | #define ERR_ILLPARM 0x12 /* Illegal parameter to player module */ |
| 156 | #define ERR_SLEDGE 0x13 |
| 157 | #define ERR_FOCUS 0x14 |
| 158 | #define ERR_MOTOR 0x15 |
| 159 | #define ERR_RADIAL 0x16 |
| 160 | #define ERR_PLL 0x17 /* PLL lock error */ |
| 161 | #define ERR_SUB_TIM 0x18 /* Subcode timeout error */ |
| 162 | #define ERR_SUB_NF 0x19 /* Subcode not found error */ |
| 163 | #define ERR_TRAY 0x1a |
| 164 | #define ERR_TOC 0x1b /* Table of Contents read error */ |
| 165 | #define ERR_JUMP 0x1c |
| 166 | /* Data errors */ |
| 167 | #define ERR_MODE 0x21 |
| 168 | #define ERR_FORM 0x22 |
| 169 | #define ERR_HEADADDR 0x23 /* Header Address not found */ |
| 170 | #define ERR_CRC 0x24 |
| 171 | #define ERR_ECC 0x25 /* Uncorrectable ECC error */ |
| 172 | #define ERR_CRC_UNC 0x26 /* CRC error and uncorrectable error */ |
| 173 | #define ERR_ILLBSYNC 0x27 /* Illegal block sync error */ |
| 174 | #define ERR_VDST 0x28 /* VDST not found */ |
| 175 | /* Timeout errors */ |
| 176 | #define ERR_READ_TIM 0x31 /* Read timeout error */ |
| 177 | #define ERR_DEC_STP 0x32 /* Decoder stopped */ |
| 178 | #define ERR_DEC_TIM 0x33 /* Decoder interrupt timeout error */ |
| 179 | /* Function abort codes */ |
| 180 | #define ERR_KEY 0x41 /* Key -Detected abort */ |
| 181 | #define ERR_READ_FINISH 0x42 /* Read Finish */ |
| 182 | /* Second Byte diagnostic codes */ |
| 183 | #define ERR_NOBSYNC 0x01 /* No block sync */ |
| 184 | #define ERR_SHORTB 0x02 /* Short block */ |
| 185 | #define ERR_LONGB 0x03 /* Long block */ |
| 186 | #define ERR_SHORTDSP 0x04 /* Short DSP word */ |
| 187 | #define ERR_LONGDSP 0x05 /* Long DSP word */ |
| 188 | |
| 189 | |
| 190 | /* Status availability flags read from STATUS register */ |
| 191 | #define FL_EJECT 0x20 |
| 192 | #define FL_WAIT 0x10 /* active low */ |
| 193 | #define FL_EOP 0x08 /* active low */ |
| 194 | #define FL_STEN 0x04 /* Status available when low */ |
| 195 | #define FL_DTEN 0x02 /* Data available when low */ |
| 196 | #define FL_DRQ 0x01 /* active low */ |
| 197 | #define FL_RESET 0xde /* These bits are high after a reset */ |
| 198 | #define FL_STDT (FL_STEN|FL_DTEN) |
| 199 | |
| 200 | |
| 201 | /* Transfer mode, written to HCON register */ |
| 202 | #define HCON_DTS 0x08 |
| 203 | #define HCON_SDRQB 0x04 |
| 204 | #define HCON_LOHI 0x02 |
| 205 | #define HCON_DMA16 0x01 |
| 206 | |
| 207 | |
| 208 | /* Drive command set, written to COMIN register */ |
| 209 | /* Quick response commands */ |
| 210 | #define COMDRVST 0x20 /* Drive Status Read */ |
| 211 | #define COMERRST 0x21 /* Error Status Read */ |
| 212 | #define COMIOCTLISTAT 0x22 /* Status Read; reset disk changed bit */ |
| 213 | #define COMINITSINGLE 0x28 /* Initialize Single Speed */ |
| 214 | #define COMINITDOUBLE 0x29 /* Initialize Double Speed */ |
| 215 | #define COMUNLOCK 0x30 /* Unlock */ |
| 216 | #define COMLOCK 0x31 /* Lock */ |
| 217 | #define COMLOCKST 0x32 /* Lock/Unlock Status */ |
| 218 | #define COMVERSION 0x40 /* Get Firmware Revision */ |
| 219 | #define COMVOIDREADMODE 0x50 /* Void Data Read Mode */ |
| 220 | /* Read commands */ |
| 221 | #define COMFETCH 0x60 /* Prefetch Data */ |
| 222 | #define COMREAD 0x61 /* Read */ |
| 223 | #define COMREADRAW 0x62 /* Read Raw Data */ |
| 224 | #define COMREADALL 0x63 /* Read All 2646 Bytes */ |
| 225 | /* Player control commands */ |
| 226 | #define COMLEADIN 0x70 /* Seek To Lead-in */ |
| 227 | #define COMSEEK 0x71 /* Seek */ |
| 228 | #define COMPAUSEON 0x80 /* Pause On */ |
| 229 | #define COMPAUSEOFF 0x81 /* Pause Off */ |
| 230 | #define COMSTOP 0x82 /* Stop */ |
| 231 | #define COMOPEN 0x90 /* Open Tray Door */ |
| 232 | #define COMCLOSE 0x91 /* Close Tray Door */ |
| 233 | #define COMPLAY 0xa0 /* Audio Play */ |
| 234 | #define COMPLAY_TNO 0xa2 /* Audio Play By Track Number */ |
| 235 | #define COMSUBQ 0xb0 /* Read Sub-q Code */ |
| 236 | #define COMLOCATION 0xb1 /* Read Head Position */ |
| 237 | /* Audio control commands */ |
| 238 | #define COMCHCTRL 0xc0 /* Audio Channel Control */ |
| 239 | /* Miscellaneous (test) commands */ |
| 240 | #define COMDRVTEST 0xd0 /* Write Test Bytes */ |
| 241 | #define COMTEST 0xd1 /* Diagnostic Test */ |
| 242 | |
| 243 | /* Low level drive interface. Only here we do actual I/O |
| 244 | Waiting for status / data available */ |
| 245 | |
| 246 | |
| 247 | /* Busy wait until FLAG goes low. Return 0 on timeout. */ |
| 248 | inline static int flag_low(int flag, unsigned long timeout) |
| 249 | { |
| 250 | int flag_high; |
| 251 | unsigned long count = 0; |
| 252 | |
| 253 | while ((flag_high = (inb(STATUS_PORT) & flag))) |
| 254 | if (++count >= timeout) |
| 255 | break; |
| 256 | |
| 257 | DEBUG((DEBUG_DRIVE_IF, "flag_low 0x%x count %ld%s", |
| 258 | flag, count, flag_high ? " timeout" : "")); |
| 259 | return !flag_high; |
| 260 | } |
| 261 | |
| 262 | |
| 263 | /* Timed waiting for status or data */ |
| 264 | static int sleep_timeout; /* max # of ticks to sleep */ |
| 265 | static DECLARE_WAIT_QUEUE_HEAD(waitq); |
| 266 | static void sleep_timer(unsigned long data); |
| 267 | static struct timer_list delay_timer = TIMER_INITIALIZER(sleep_timer, 0, 0); |
| 268 | static DEFINE_SPINLOCK(optcd_lock); |
| 269 | static struct request_queue *opt_queue; |
| 270 | |
| 271 | /* Timer routine: wake up when desired flag goes low, |
| 272 | or when timeout expires. */ |
| 273 | static void sleep_timer(unsigned long data) |
| 274 | { |
| 275 | int flags = inb(STATUS_PORT) & FL_STDT; |
| 276 | |
| 277 | if (flags == FL_STDT && --sleep_timeout > 0) { |
| 278 | mod_timer(&delay_timer, jiffies + HZ/100); /* multi-statement macro */ |
| 279 | } else |
| 280 | wake_up(&waitq); |
| 281 | } |
| 282 | |
| 283 | |
| 284 | /* Sleep until FLAG goes low. Return 0 on timeout or wrong flag low. */ |
| 285 | static int sleep_flag_low(int flag, unsigned long timeout) |
| 286 | { |
| 287 | int flag_high; |
| 288 | |
| 289 | DEBUG((DEBUG_DRIVE_IF, "sleep_flag_low")); |
| 290 | |
| 291 | sleep_timeout = timeout; |
| 292 | flag_high = inb(STATUS_PORT) & flag; |
| 293 | if (flag_high && sleep_timeout > 0) { |
| 294 | mod_timer(&delay_timer, jiffies + HZ/100); |
| 295 | sleep_on(&waitq); |
| 296 | flag_high = inb(STATUS_PORT) & flag; |
| 297 | } |
| 298 | |
| 299 | DEBUG((DEBUG_DRIVE_IF, "flag 0x%x count %ld%s", |
| 300 | flag, timeout, flag_high ? " timeout" : "")); |
| 301 | return !flag_high; |
| 302 | } |
| 303 | |
| 304 | /* Low level drive interface. Only here we do actual I/O |
| 305 | Sending commands and parameters */ |
| 306 | |
| 307 | |
| 308 | /* Errors in the command protocol */ |
| 309 | #define ERR_IF_CMD_TIMEOUT 0x100 |
| 310 | #define ERR_IF_ERR_TIMEOUT 0x101 |
| 311 | #define ERR_IF_RESP_TIMEOUT 0x102 |
| 312 | #define ERR_IF_DATA_TIMEOUT 0x103 |
| 313 | #define ERR_IF_NOSTAT 0x104 |
| 314 | |
| 315 | |
| 316 | /* Send command code. Return <0 indicates error */ |
| 317 | static int send_cmd(int cmd) |
| 318 | { |
| 319 | unsigned char ack; |
| 320 | |
| 321 | DEBUG((DEBUG_DRIVE_IF, "sending command 0x%02x\n", cmd)); |
| 322 | |
| 323 | outb(HCON_DTS, HCON_PORT); /* Enable Suspend Data Transfer */ |
| 324 | outb(cmd, COMIN_PORT); /* Send command code */ |
| 325 | if (!flag_low(FL_STEN, BUSY_TIMEOUT)) /* Wait for status */ |
| 326 | return -ERR_IF_CMD_TIMEOUT; |
| 327 | ack = inb(DATA_PORT); /* read command acknowledge */ |
| 328 | outb(HCON_SDRQB, HCON_PORT); /* Disable Suspend Data Transfer */ |
| 329 | return ack==ST_OP_OK ? 0 : -ack; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | /* Send command parameters. Return <0 indicates error */ |
| 334 | static int send_params(struct cdrom_msf *params) |
| 335 | { |
| 336 | unsigned char ack; |
| 337 | |
| 338 | DEBUG((DEBUG_DRIVE_IF, "sending parameters" |
| 339 | " %02x:%02x:%02x" |
| 340 | " %02x:%02x:%02x", |
| 341 | params->cdmsf_min0, |
| 342 | params->cdmsf_sec0, |
| 343 | params->cdmsf_frame0, |
| 344 | params->cdmsf_min1, |
| 345 | params->cdmsf_sec1, |
| 346 | params->cdmsf_frame1)); |
| 347 | |
| 348 | outb(params->cdmsf_min0, COMIN_PORT); |
| 349 | outb(params->cdmsf_sec0, COMIN_PORT); |
| 350 | outb(params->cdmsf_frame0, COMIN_PORT); |
| 351 | outb(params->cdmsf_min1, COMIN_PORT); |
| 352 | outb(params->cdmsf_sec1, COMIN_PORT); |
| 353 | outb(params->cdmsf_frame1, COMIN_PORT); |
| 354 | if (!flag_low(FL_STEN, BUSY_TIMEOUT)) /* Wait for status */ |
| 355 | return -ERR_IF_CMD_TIMEOUT; |
| 356 | ack = inb(DATA_PORT); /* read command acknowledge */ |
| 357 | return ack==ST_PA_OK ? 0 : -ack; |
| 358 | } |
| 359 | |
| 360 | |
| 361 | /* Send parameters for SEEK command. Return <0 indicates error */ |
| 362 | static int send_seek_params(struct cdrom_msf *params) |
| 363 | { |
| 364 | unsigned char ack; |
| 365 | |
| 366 | DEBUG((DEBUG_DRIVE_IF, "sending seek parameters" |
| 367 | " %02x:%02x:%02x", |
| 368 | params->cdmsf_min0, |
| 369 | params->cdmsf_sec0, |
| 370 | params->cdmsf_frame0)); |
| 371 | |
| 372 | outb(params->cdmsf_min0, COMIN_PORT); |
| 373 | outb(params->cdmsf_sec0, COMIN_PORT); |
| 374 | outb(params->cdmsf_frame0, COMIN_PORT); |
| 375 | if (!flag_low(FL_STEN, BUSY_TIMEOUT)) /* Wait for status */ |
| 376 | return -ERR_IF_CMD_TIMEOUT; |
| 377 | ack = inb(DATA_PORT); /* read command acknowledge */ |
| 378 | return ack==ST_PA_OK ? 0 : -ack; |
| 379 | } |
| 380 | |
| 381 | |
| 382 | /* Wait for command execution status. Choice between busy waiting |
| 383 | and sleeping. Return value <0 indicates timeout. */ |
| 384 | inline static int get_exec_status(int busy_waiting) |
| 385 | { |
| 386 | unsigned char exec_status; |
| 387 | |
| 388 | if (busy_waiting |
| 389 | ? !flag_low(FL_STEN, BUSY_TIMEOUT) |
| 390 | : !sleep_flag_low(FL_STEN, SLEEP_TIMEOUT)) |
| 391 | return -ERR_IF_CMD_TIMEOUT; |
| 392 | |
| 393 | exec_status = inb(DATA_PORT); |
| 394 | DEBUG((DEBUG_DRIVE_IF, "returned exec status 0x%02x", exec_status)); |
| 395 | return exec_status; |
| 396 | } |
| 397 | |
| 398 | |
| 399 | /* Wait busy for extra byte of data that a command returns. |
| 400 | Return value <0 indicates timeout. */ |
| 401 | inline static int get_data(int short_timeout) |
| 402 | { |
| 403 | unsigned char data; |
| 404 | |
| 405 | if (!flag_low(FL_STEN, short_timeout ? FAST_TIMEOUT : BUSY_TIMEOUT)) |
| 406 | return -ERR_IF_DATA_TIMEOUT; |
| 407 | |
| 408 | data = inb(DATA_PORT); |
| 409 | DEBUG((DEBUG_DRIVE_IF, "returned data 0x%02x", data)); |
| 410 | return data; |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* Returns 0 if failed */ |
| 415 | static int reset_drive(void) |
| 416 | { |
| 417 | unsigned long count = 0; |
| 418 | int flags; |
| 419 | |
| 420 | DEBUG((DEBUG_DRIVE_IF, "reset drive")); |
| 421 | |
| 422 | outb(0, RESET_PORT); |
| 423 | while (++count < RESET_WAIT) |
| 424 | inb(DATA_PORT); |
| 425 | |
| 426 | count = 0; |
| 427 | while ((flags = (inb(STATUS_PORT) & FL_RESET)) != FL_RESET) |
| 428 | if (++count >= BUSY_TIMEOUT) |
| 429 | break; |
| 430 | |
| 431 | DEBUG((DEBUG_DRIVE_IF, "reset %s", |
| 432 | flags == FL_RESET ? "succeeded" : "failed")); |
| 433 | |
| 434 | if (flags != FL_RESET) |
| 435 | return 0; /* Reset failed */ |
| 436 | outb(HCON_SDRQB, HCON_PORT); /* Disable Suspend Data Transfer */ |
| 437 | return 1; /* Reset succeeded */ |
| 438 | } |
| 439 | |
| 440 | |
| 441 | /* Facilities for asynchronous operation */ |
| 442 | |
| 443 | /* Read status/data availability flags FL_STEN and FL_DTEN */ |
| 444 | inline static int stdt_flags(void) |
| 445 | { |
| 446 | return inb(STATUS_PORT) & FL_STDT; |
| 447 | } |
| 448 | |
| 449 | |
| 450 | /* Fetch status that has previously been waited for. <0 means not available */ |
| 451 | inline static int fetch_status(void) |
| 452 | { |
| 453 | unsigned char status; |
| 454 | |
| 455 | if (inb(STATUS_PORT) & FL_STEN) |
| 456 | return -ERR_IF_NOSTAT; |
| 457 | |
| 458 | status = inb(DATA_PORT); |
| 459 | DEBUG((DEBUG_DRIVE_IF, "fetched exec status 0x%02x", status)); |
| 460 | return status; |
| 461 | } |
| 462 | |
| 463 | |
| 464 | /* Fetch data that has previously been waited for. */ |
| 465 | inline static void fetch_data(char *buf, int n) |
| 466 | { |
| 467 | insb(DATA_PORT, buf, n); |
| 468 | DEBUG((DEBUG_DRIVE_IF, "fetched 0x%x bytes", n)); |
| 469 | } |
| 470 | |
| 471 | |
| 472 | /* Flush status and data fifos */ |
| 473 | inline static void flush_data(void) |
| 474 | { |
| 475 | while ((inb(STATUS_PORT) & FL_STDT) != FL_STDT) |
| 476 | inb(DATA_PORT); |
| 477 | DEBUG((DEBUG_DRIVE_IF, "flushed fifos")); |
| 478 | } |
| 479 | |
| 480 | /* Command protocol */ |
| 481 | |
| 482 | |
| 483 | /* Send a simple command and wait for response. Command codes < COMFETCH |
| 484 | are quick response commands */ |
| 485 | inline static int exec_cmd(int cmd) |
| 486 | { |
| 487 | int ack = send_cmd(cmd); |
| 488 | if (ack < 0) |
| 489 | return ack; |
| 490 | return get_exec_status(cmd < COMFETCH); |
| 491 | } |
| 492 | |
| 493 | |
| 494 | /* Send a command with parameters. Don't wait for the response, |
| 495 | * which consists of data blocks read from the CD. */ |
| 496 | inline static int exec_read_cmd(int cmd, struct cdrom_msf *params) |
| 497 | { |
| 498 | int ack = send_cmd(cmd); |
| 499 | if (ack < 0) |
| 500 | return ack; |
| 501 | return send_params(params); |
| 502 | } |
| 503 | |
| 504 | |
| 505 | /* Send a seek command with parameters and wait for response */ |
| 506 | inline static int exec_seek_cmd(int cmd, struct cdrom_msf *params) |
| 507 | { |
| 508 | int ack = send_cmd(cmd); |
| 509 | if (ack < 0) |
| 510 | return ack; |
| 511 | ack = send_seek_params(params); |
| 512 | if (ack < 0) |
| 513 | return ack; |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | |
| 518 | /* Send a command with parameters and wait for response */ |
| 519 | inline static int exec_long_cmd(int cmd, struct cdrom_msf *params) |
| 520 | { |
| 521 | int ack = exec_read_cmd(cmd, params); |
| 522 | if (ack < 0) |
| 523 | return ack; |
| 524 | return get_exec_status(0); |
| 525 | } |
| 526 | |
| 527 | /* Address conversion routines */ |
| 528 | |
| 529 | |
| 530 | /* Binary to BCD (2 digits) */ |
| 531 | inline static void single_bin2bcd(u_char *p) |
| 532 | { |
| 533 | DEBUG((DEBUG_CONV, "bin2bcd %02d", *p)); |
| 534 | *p = (*p % 10) | ((*p / 10) << 4); |
| 535 | } |
| 536 | |
| 537 | |
| 538 | /* Convert entire msf struct */ |
| 539 | static void bin2bcd(struct cdrom_msf *msf) |
| 540 | { |
| 541 | single_bin2bcd(&msf->cdmsf_min0); |
| 542 | single_bin2bcd(&msf->cdmsf_sec0); |
| 543 | single_bin2bcd(&msf->cdmsf_frame0); |
| 544 | single_bin2bcd(&msf->cdmsf_min1); |
| 545 | single_bin2bcd(&msf->cdmsf_sec1); |
| 546 | single_bin2bcd(&msf->cdmsf_frame1); |
| 547 | } |
| 548 | |
| 549 | |
| 550 | /* Linear block address to minute, second, frame form */ |
| 551 | #define CD_FPM (CD_SECS * CD_FRAMES) /* frames per minute */ |
| 552 | |
| 553 | static void lba2msf(int lba, struct cdrom_msf *msf) |
| 554 | { |
| 555 | DEBUG((DEBUG_CONV, "lba2msf %d", lba)); |
| 556 | lba += CD_MSF_OFFSET; |
| 557 | msf->cdmsf_min0 = lba / CD_FPM; lba %= CD_FPM; |
| 558 | msf->cdmsf_sec0 = lba / CD_FRAMES; |
| 559 | msf->cdmsf_frame0 = lba % CD_FRAMES; |
| 560 | msf->cdmsf_min1 = 0; |
| 561 | msf->cdmsf_sec1 = 0; |
| 562 | msf->cdmsf_frame1 = 0; |
| 563 | bin2bcd(msf); |
| 564 | } |
| 565 | |
| 566 | |
| 567 | /* Two BCD digits to binary */ |
| 568 | inline static u_char bcd2bin(u_char bcd) |
| 569 | { |
| 570 | DEBUG((DEBUG_CONV, "bcd2bin %x%02x", bcd)); |
| 571 | return (bcd >> 4) * 10 + (bcd & 0x0f); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | static void msf2lba(union cdrom_addr *addr) |
| 576 | { |
| 577 | addr->lba = addr->msf.minute * CD_FPM |
| 578 | + addr->msf.second * CD_FRAMES |
| 579 | + addr->msf.frame - CD_MSF_OFFSET; |
| 580 | } |
| 581 | |
| 582 | |
| 583 | /* Minute, second, frame address BCD to binary or to linear address, |
| 584 | depending on MODE */ |
| 585 | static void msf_bcd2bin(union cdrom_addr *addr) |
| 586 | { |
| 587 | addr->msf.minute = bcd2bin(addr->msf.minute); |
| 588 | addr->msf.second = bcd2bin(addr->msf.second); |
| 589 | addr->msf.frame = bcd2bin(addr->msf.frame); |
| 590 | } |
| 591 | |
| 592 | /* High level drive commands */ |
| 593 | |
| 594 | |
| 595 | static int audio_status = CDROM_AUDIO_NO_STATUS; |
| 596 | static char toc_uptodate = 0; |
| 597 | static char disk_changed = 1; |
| 598 | |
| 599 | /* Get drive status, flagging completion of audio play and disk changes. */ |
| 600 | static int drive_status(void) |
| 601 | { |
| 602 | int status; |
| 603 | |
| 604 | status = exec_cmd(COMIOCTLISTAT); |
| 605 | DEBUG((DEBUG_DRIVE_IF, "IOCTLISTAT: %03x", status)); |
| 606 | if (status < 0) |
| 607 | return status; |
| 608 | if (status == 0xff) /* No status available */ |
| 609 | return -ERR_IF_NOSTAT; |
| 610 | |
| 611 | if (((status & ST_MODE_BITS) != ST_M_AUDIO) && |
| 612 | (audio_status == CDROM_AUDIO_PLAY)) { |
| 613 | audio_status = CDROM_AUDIO_COMPLETED; |
| 614 | } |
| 615 | |
| 616 | if (status & ST_DSK_CHG) { |
| 617 | toc_uptodate = 0; |
| 618 | disk_changed = 1; |
| 619 | audio_status = CDROM_AUDIO_NO_STATUS; |
| 620 | } |
| 621 | |
| 622 | return status; |
| 623 | } |
| 624 | |
| 625 | |
| 626 | /* Read the current Q-channel info. Also used for reading the |
| 627 | table of contents. qp->cdsc_format must be set on entry to |
| 628 | indicate the desired address format */ |
| 629 | static int get_q_channel(struct cdrom_subchnl *qp) |
| 630 | { |
| 631 | int status, d1, d2, d3, d4, d5, d6, d7, d8, d9, d10; |
| 632 | |
| 633 | status = drive_status(); |
| 634 | if (status < 0) |
| 635 | return status; |
| 636 | qp->cdsc_audiostatus = audio_status; |
| 637 | |
| 638 | status = exec_cmd(COMSUBQ); |
| 639 | if (status < 0) |
| 640 | return status; |
| 641 | |
| 642 | d1 = get_data(0); |
| 643 | if (d1 < 0) |
| 644 | return d1; |
| 645 | qp->cdsc_adr = d1; |
| 646 | qp->cdsc_ctrl = d1 >> 4; |
| 647 | |
| 648 | d2 = get_data(0); |
| 649 | if (d2 < 0) |
| 650 | return d2; |
| 651 | qp->cdsc_trk = bcd2bin(d2); |
| 652 | |
| 653 | d3 = get_data(0); |
| 654 | if (d3 < 0) |
| 655 | return d3; |
| 656 | qp->cdsc_ind = bcd2bin(d3); |
| 657 | |
| 658 | d4 = get_data(0); |
| 659 | if (d4 < 0) |
| 660 | return d4; |
| 661 | qp->cdsc_reladdr.msf.minute = d4; |
| 662 | |
| 663 | d5 = get_data(0); |
| 664 | if (d5 < 0) |
| 665 | return d5; |
| 666 | qp->cdsc_reladdr.msf.second = d5; |
| 667 | |
| 668 | d6 = get_data(0); |
| 669 | if (d6 < 0) |
| 670 | return d6; |
| 671 | qp->cdsc_reladdr.msf.frame = d6; |
| 672 | |
| 673 | d7 = get_data(0); |
| 674 | if (d7 < 0) |
| 675 | return d7; |
| 676 | /* byte not used */ |
| 677 | |
| 678 | d8 = get_data(0); |
| 679 | if (d8 < 0) |
| 680 | return d8; |
| 681 | qp->cdsc_absaddr.msf.minute = d8; |
| 682 | |
| 683 | d9 = get_data(0); |
| 684 | if (d9 < 0) |
| 685 | return d9; |
| 686 | qp->cdsc_absaddr.msf.second = d9; |
| 687 | |
| 688 | d10 = get_data(0); |
| 689 | if (d10 < 0) |
| 690 | return d10; |
| 691 | qp->cdsc_absaddr.msf.frame = d10; |
| 692 | |
| 693 | DEBUG((DEBUG_TOC, "%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x", |
| 694 | d1, d2, d3, d4, d5, d6, d7, d8, d9, d10)); |
| 695 | |
| 696 | msf_bcd2bin(&qp->cdsc_absaddr); |
| 697 | msf_bcd2bin(&qp->cdsc_reladdr); |
| 698 | if (qp->cdsc_format == CDROM_LBA) { |
| 699 | msf2lba(&qp->cdsc_absaddr); |
| 700 | msf2lba(&qp->cdsc_reladdr); |
| 701 | } |
| 702 | |
| 703 | return 0; |
| 704 | } |
| 705 | |
| 706 | /* Table of contents handling */ |
| 707 | |
| 708 | |
| 709 | /* Errors in table of contents */ |
| 710 | #define ERR_TOC_MISSINGINFO 0x120 |
| 711 | #define ERR_TOC_MISSINGENTRY 0x121 |
| 712 | |
| 713 | |
| 714 | struct cdrom_disk_info { |
| 715 | unsigned char first; |
| 716 | unsigned char last; |
| 717 | struct cdrom_msf0 disk_length; |
| 718 | struct cdrom_msf0 first_track; |
| 719 | /* Multisession info: */ |
| 720 | unsigned char next; |
| 721 | struct cdrom_msf0 next_session; |
| 722 | struct cdrom_msf0 last_session; |
| 723 | unsigned char multi; |
| 724 | unsigned char xa; |
| 725 | unsigned char audio; |
| 726 | }; |
| 727 | static struct cdrom_disk_info disk_info; |
| 728 | |
| 729 | #define MAX_TRACKS 111 |
| 730 | static struct cdrom_subchnl toc[MAX_TRACKS]; |
| 731 | |
| 732 | #define QINFO_FIRSTTRACK 100 /* bcd2bin(0xa0) */ |
| 733 | #define QINFO_LASTTRACK 101 /* bcd2bin(0xa1) */ |
| 734 | #define QINFO_DISKLENGTH 102 /* bcd2bin(0xa2) */ |
| 735 | #define QINFO_NEXTSESSION 110 /* bcd2bin(0xb0) */ |
| 736 | |
| 737 | #define I_FIRSTTRACK 0x01 |
| 738 | #define I_LASTTRACK 0x02 |
| 739 | #define I_DISKLENGTH 0x04 |
| 740 | #define I_NEXTSESSION 0x08 |
| 741 | #define I_ALL (I_FIRSTTRACK | I_LASTTRACK | I_DISKLENGTH) |
| 742 | |
| 743 | |
| 744 | #if DEBUG_TOC |
| 745 | static void toc_debug_info(int i) |
| 746 | { |
| 747 | printk(KERN_DEBUG "#%3d ctl %1x, adr %1x, track %2d index %3d" |
| 748 | " %2d:%02d.%02d %2d:%02d.%02d\n", |
| 749 | i, toc[i].cdsc_ctrl, toc[i].cdsc_adr, |
| 750 | toc[i].cdsc_trk, toc[i].cdsc_ind, |
| 751 | toc[i].cdsc_reladdr.msf.minute, |
| 752 | toc[i].cdsc_reladdr.msf.second, |
| 753 | toc[i].cdsc_reladdr.msf.frame, |
| 754 | toc[i].cdsc_absaddr.msf.minute, |
| 755 | toc[i].cdsc_absaddr.msf.second, |
| 756 | toc[i].cdsc_absaddr.msf.frame); |
| 757 | } |
| 758 | #endif |
| 759 | |
| 760 | |
| 761 | static int read_toc(void) |
| 762 | { |
| 763 | int status, limit, count; |
| 764 | unsigned char got_info = 0; |
| 765 | struct cdrom_subchnl q_info; |
| 766 | #if DEBUG_TOC |
| 767 | int i; |
| 768 | #endif |
| 769 | |
| 770 | DEBUG((DEBUG_TOC, "starting read_toc")); |
| 771 | |
| 772 | count = 0; |
| 773 | for (limit = 60; limit > 0; limit--) { |
| 774 | int index; |
| 775 | |
| 776 | q_info.cdsc_format = CDROM_MSF; |
| 777 | status = get_q_channel(&q_info); |
| 778 | if (status < 0) |
| 779 | return status; |
| 780 | |
| 781 | index = q_info.cdsc_ind; |
| 782 | if (index > 0 && index < MAX_TRACKS |
| 783 | && q_info.cdsc_trk == 0 && toc[index].cdsc_ind == 0) { |
| 784 | toc[index] = q_info; |
| 785 | DEBUG((DEBUG_TOC, "got %d", index)); |
| 786 | if (index < 100) |
| 787 | count++; |
| 788 | |
| 789 | switch (q_info.cdsc_ind) { |
| 790 | case QINFO_FIRSTTRACK: |
| 791 | got_info |= I_FIRSTTRACK; |
| 792 | break; |
| 793 | case QINFO_LASTTRACK: |
| 794 | got_info |= I_LASTTRACK; |
| 795 | break; |
| 796 | case QINFO_DISKLENGTH: |
| 797 | got_info |= I_DISKLENGTH; |
| 798 | break; |
| 799 | case QINFO_NEXTSESSION: |
| 800 | got_info |= I_NEXTSESSION; |
| 801 | break; |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | if ((got_info & I_ALL) == I_ALL |
| 806 | && toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute + count |
| 807 | >= toc[QINFO_LASTTRACK].cdsc_absaddr.msf.minute + 1) |
| 808 | break; |
| 809 | } |
| 810 | |
| 811 | /* Construct disk_info from TOC */ |
| 812 | if (disk_info.first == 0) { |
| 813 | disk_info.first = toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute; |
| 814 | disk_info.first_track.minute = |
| 815 | toc[disk_info.first].cdsc_absaddr.msf.minute; |
| 816 | disk_info.first_track.second = |
| 817 | toc[disk_info.first].cdsc_absaddr.msf.second; |
| 818 | disk_info.first_track.frame = |
| 819 | toc[disk_info.first].cdsc_absaddr.msf.frame; |
| 820 | } |
| 821 | disk_info.last = toc[QINFO_LASTTRACK].cdsc_absaddr.msf.minute; |
| 822 | disk_info.disk_length.minute = |
| 823 | toc[QINFO_DISKLENGTH].cdsc_absaddr.msf.minute; |
| 824 | disk_info.disk_length.second = |
| 825 | toc[QINFO_DISKLENGTH].cdsc_absaddr.msf.second-2; |
| 826 | disk_info.disk_length.frame = |
| 827 | toc[QINFO_DISKLENGTH].cdsc_absaddr.msf.frame; |
| 828 | disk_info.next_session.minute = |
| 829 | toc[QINFO_NEXTSESSION].cdsc_reladdr.msf.minute; |
| 830 | disk_info.next_session.second = |
| 831 | toc[QINFO_NEXTSESSION].cdsc_reladdr.msf.second; |
| 832 | disk_info.next_session.frame = |
| 833 | toc[QINFO_NEXTSESSION].cdsc_reladdr.msf.frame; |
| 834 | disk_info.next = toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute; |
| 835 | disk_info.last_session.minute = |
| 836 | toc[disk_info.next].cdsc_absaddr.msf.minute; |
| 837 | disk_info.last_session.second = |
| 838 | toc[disk_info.next].cdsc_absaddr.msf.second; |
| 839 | disk_info.last_session.frame = |
| 840 | toc[disk_info.next].cdsc_absaddr.msf.frame; |
| 841 | toc[disk_info.last + 1].cdsc_absaddr.msf.minute = |
| 842 | disk_info.disk_length.minute; |
| 843 | toc[disk_info.last + 1].cdsc_absaddr.msf.second = |
| 844 | disk_info.disk_length.second; |
| 845 | toc[disk_info.last + 1].cdsc_absaddr.msf.frame = |
| 846 | disk_info.disk_length.frame; |
| 847 | #if DEBUG_TOC |
| 848 | for (i = 1; i <= disk_info.last + 1; i++) |
| 849 | toc_debug_info(i); |
| 850 | toc_debug_info(QINFO_FIRSTTRACK); |
| 851 | toc_debug_info(QINFO_LASTTRACK); |
| 852 | toc_debug_info(QINFO_DISKLENGTH); |
| 853 | toc_debug_info(QINFO_NEXTSESSION); |
| 854 | #endif |
| 855 | |
| 856 | DEBUG((DEBUG_TOC, "exiting read_toc, got_info %x, count %d", |
| 857 | got_info, count)); |
| 858 | if ((got_info & I_ALL) != I_ALL |
| 859 | || toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute + count |
| 860 | < toc[QINFO_LASTTRACK].cdsc_absaddr.msf.minute + 1) |
| 861 | return -ERR_TOC_MISSINGINFO; |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | |
| 866 | #ifdef MULTISESSION |
| 867 | static int get_multi_disk_info(void) |
| 868 | { |
| 869 | int sessions, status; |
| 870 | struct cdrom_msf multi_index; |
| 871 | |
| 872 | |
| 873 | for (sessions = 2; sessions < 10 /* %%for now */; sessions++) { |
| 874 | int count; |
| 875 | |
| 876 | for (count = 100; count < MAX_TRACKS; count++) |
| 877 | toc[count].cdsc_ind = 0; |
| 878 | |
| 879 | multi_index.cdmsf_min0 = disk_info.next_session.minute; |
| 880 | multi_index.cdmsf_sec0 = disk_info.next_session.second; |
| 881 | multi_index.cdmsf_frame0 = disk_info.next_session.frame; |
| 882 | if (multi_index.cdmsf_sec0 >= 20) |
| 883 | multi_index.cdmsf_sec0 -= 20; |
| 884 | else { |
| 885 | multi_index.cdmsf_sec0 += 40; |
| 886 | multi_index.cdmsf_min0--; |
| 887 | } |
| 888 | DEBUG((DEBUG_MULTIS, "Try %d: %2d:%02d.%02d", sessions, |
| 889 | multi_index.cdmsf_min0, |
| 890 | multi_index.cdmsf_sec0, |
| 891 | multi_index.cdmsf_frame0)); |
| 892 | bin2bcd(&multi_index); |
| 893 | multi_index.cdmsf_min1 = 0; |
| 894 | multi_index.cdmsf_sec1 = 0; |
| 895 | multi_index.cdmsf_frame1 = 1; |
| 896 | |
| 897 | status = exec_read_cmd(COMREAD, &multi_index); |
| 898 | if (status < 0) { |
| 899 | DEBUG((DEBUG_TOC, "exec_read_cmd COMREAD: %02x", |
| 900 | -status)); |
| 901 | break; |
| 902 | } |
| 903 | status = sleep_flag_low(FL_DTEN, MULTI_SEEK_TIMEOUT) ? |
| 904 | 0 : -ERR_TOC_MISSINGINFO; |
| 905 | flush_data(); |
| 906 | if (status < 0) { |
| 907 | DEBUG((DEBUG_TOC, "sleep_flag_low: %02x", -status)); |
| 908 | break; |
| 909 | } |
| 910 | |
| 911 | status = read_toc(); |
| 912 | if (status < 0) { |
| 913 | DEBUG((DEBUG_TOC, "read_toc: %02x", -status)); |
| 914 | break; |
| 915 | } |
| 916 | |
| 917 | disk_info.multi = 1; |
| 918 | } |
| 919 | |
| 920 | exec_cmd(COMSTOP); |
| 921 | |
| 922 | if (status < 0) |
| 923 | return -EIO; |
| 924 | return 0; |
| 925 | } |
| 926 | #endif /* MULTISESSION */ |
| 927 | |
| 928 | |
| 929 | static int update_toc(void) |
| 930 | { |
| 931 | int status, count; |
| 932 | |
| 933 | if (toc_uptodate) |
| 934 | return 0; |
| 935 | |
| 936 | DEBUG((DEBUG_TOC, "starting update_toc")); |
| 937 | |
| 938 | disk_info.first = 0; |
| 939 | for (count = 0; count < MAX_TRACKS; count++) |
| 940 | toc[count].cdsc_ind = 0; |
| 941 | |
| 942 | status = exec_cmd(COMLEADIN); |
| 943 | if (status < 0) |
| 944 | return -EIO; |
| 945 | |
| 946 | status = read_toc(); |
| 947 | if (status < 0) { |
| 948 | DEBUG((DEBUG_TOC, "read_toc: %02x", -status)); |
| 949 | return -EIO; |
| 950 | } |
| 951 | |
| 952 | /* Audio disk detection. Look at first track. */ |
| 953 | disk_info.audio = |
| 954 | (toc[disk_info.first].cdsc_ctrl & CDROM_DATA_TRACK) ? 0 : 1; |
| 955 | |
| 956 | /* XA detection */ |
| 957 | disk_info.xa = drive_status() & ST_MODE2TRACK; |
| 958 | |
| 959 | /* Multisession detection: if we want this, define MULTISESSION */ |
| 960 | disk_info.multi = 0; |
| 961 | #ifdef MULTISESSION |
| 962 | if (disk_info.xa) |
| 963 | get_multi_disk_info(); /* Here disk_info.multi is set */ |
| 964 | #endif /* MULTISESSION */ |
| 965 | if (disk_info.multi) |
| 966 | printk(KERN_WARNING "optcd: Multisession support experimental, " |
| 967 | "see Documentation/cdrom/optcd\n"); |
| 968 | |
| 969 | DEBUG((DEBUG_TOC, "exiting update_toc")); |
| 970 | |
| 971 | toc_uptodate = 1; |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | /* Request handling */ |
| 976 | |
| 977 | static int current_valid(void) |
| 978 | { |
| 979 | return CURRENT && |
| 980 | CURRENT->cmd == READ && |
| 981 | CURRENT->sector != -1; |
| 982 | } |
| 983 | |
| 984 | /* Buffers for block size conversion. */ |
| 985 | #define NOBUF -1 |
| 986 | |
| 987 | static char buf[CD_FRAMESIZE * N_BUFS]; |
| 988 | static volatile int buf_bn[N_BUFS], next_bn; |
| 989 | static volatile int buf_in = 0, buf_out = NOBUF; |
| 990 | |
| 991 | inline static void opt_invalidate_buffers(void) |
| 992 | { |
| 993 | int i; |
| 994 | |
| 995 | DEBUG((DEBUG_BUFFERS, "executing opt_invalidate_buffers")); |
| 996 | |
| 997 | for (i = 0; i < N_BUFS; i++) |
| 998 | buf_bn[i] = NOBUF; |
| 999 | buf_out = NOBUF; |
| 1000 | } |
| 1001 | |
| 1002 | |
| 1003 | /* Take care of the different block sizes between cdrom and Linux. |
| 1004 | When Linux gets variable block sizes this will probably go away. */ |
| 1005 | static void transfer(void) |
| 1006 | { |
| 1007 | #if DEBUG_BUFFERS | DEBUG_REQUEST |
| 1008 | printk(KERN_DEBUG "optcd: executing transfer\n"); |
| 1009 | #endif |
| 1010 | |
| 1011 | if (!current_valid()) |
| 1012 | return; |
| 1013 | while (CURRENT -> nr_sectors) { |
| 1014 | int bn = CURRENT -> sector / 4; |
| 1015 | int i, offs, nr_sectors; |
| 1016 | for (i = 0; i < N_BUFS && buf_bn[i] != bn; ++i); |
| 1017 | |
| 1018 | DEBUG((DEBUG_REQUEST, "found %d", i)); |
| 1019 | |
| 1020 | if (i >= N_BUFS) { |
| 1021 | buf_out = NOBUF; |
| 1022 | break; |
| 1023 | } |
| 1024 | |
| 1025 | offs = (i * 4 + (CURRENT -> sector & 3)) * 512; |
| 1026 | nr_sectors = 4 - (CURRENT -> sector & 3); |
| 1027 | |
| 1028 | if (buf_out != i) { |
| 1029 | buf_out = i; |
| 1030 | if (buf_bn[i] != bn) { |
| 1031 | buf_out = NOBUF; |
| 1032 | continue; |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | if (nr_sectors > CURRENT -> nr_sectors) |
| 1037 | nr_sectors = CURRENT -> nr_sectors; |
| 1038 | memcpy(CURRENT -> buffer, buf + offs, nr_sectors * 512); |
| 1039 | CURRENT -> nr_sectors -= nr_sectors; |
| 1040 | CURRENT -> sector += nr_sectors; |
| 1041 | CURRENT -> buffer += nr_sectors * 512; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | |
| 1046 | /* State machine for reading disk blocks */ |
| 1047 | |
| 1048 | enum state_e { |
| 1049 | S_IDLE, /* 0 */ |
| 1050 | S_START, /* 1 */ |
| 1051 | S_READ, /* 2 */ |
| 1052 | S_DATA, /* 3 */ |
| 1053 | S_STOP, /* 4 */ |
| 1054 | S_STOPPING /* 5 */ |
| 1055 | }; |
| 1056 | |
| 1057 | static volatile enum state_e state = S_IDLE; |
| 1058 | #if DEBUG_STATE |
| 1059 | static volatile enum state_e state_old = S_STOP; |
| 1060 | static volatile int flags_old = 0; |
| 1061 | static volatile long state_n = 0; |
| 1062 | #endif |
| 1063 | |
| 1064 | |
| 1065 | /* Used as mutex to keep do_optcd_request (and other processes calling |
| 1066 | ioctl) out while some process is inside a VFS call. |
| 1067 | Reverse is accomplished by checking if state = S_IDLE upon entry |
| 1068 | of opt_ioctl and opt_media_change. */ |
| 1069 | static int in_vfs = 0; |
| 1070 | |
| 1071 | |
| 1072 | static volatile int transfer_is_active = 0; |
| 1073 | static volatile int error = 0; /* %% do something with this?? */ |
| 1074 | static int tries; /* ibid?? */ |
| 1075 | static int timeout = 0; |
| 1076 | |
| 1077 | static void poll(unsigned long data); |
| 1078 | static struct timer_list req_timer = {.function = poll}; |
| 1079 | |
| 1080 | |
| 1081 | static void poll(unsigned long data) |
| 1082 | { |
| 1083 | static volatile int read_count = 1; |
| 1084 | int flags; |
| 1085 | int loop_again = 1; |
| 1086 | int status = 0; |
| 1087 | int skip = 0; |
| 1088 | |
| 1089 | if (error) { |
| 1090 | printk(KERN_ERR "optcd: I/O error 0x%02x\n", error); |
| 1091 | opt_invalidate_buffers(); |
| 1092 | if (!tries--) { |
| 1093 | printk(KERN_ERR "optcd: read block %d failed;" |
| 1094 | " Giving up\n", next_bn); |
| 1095 | if (transfer_is_active) |
| 1096 | loop_again = 0; |
| 1097 | if (current_valid()) |
| 1098 | end_request(CURRENT, 0); |
| 1099 | tries = 5; |
| 1100 | } |
| 1101 | error = 0; |
| 1102 | state = S_STOP; |
| 1103 | } |
| 1104 | |
| 1105 | while (loop_again) |
| 1106 | { |
| 1107 | loop_again = 0; /* each case must flip this back to 1 if we want |
| 1108 | to come back up here */ |
| 1109 | |
| 1110 | #if DEBUG_STATE |
| 1111 | if (state == state_old) |
| 1112 | state_n++; |
| 1113 | else { |
| 1114 | state_old = state; |
| 1115 | if (++state_n > 1) |
| 1116 | printk(KERN_DEBUG "optcd: %ld times " |
| 1117 | "in previous state\n", state_n); |
| 1118 | printk(KERN_DEBUG "optcd: state %d\n", state); |
| 1119 | state_n = 0; |
| 1120 | } |
| 1121 | #endif |
| 1122 | |
| 1123 | switch (state) { |
| 1124 | case S_IDLE: |
| 1125 | return; |
| 1126 | case S_START: |
| 1127 | if (in_vfs) |
| 1128 | break; |
| 1129 | if (send_cmd(COMDRVST)) { |
| 1130 | state = S_IDLE; |
| 1131 | while (current_valid()) |
| 1132 | end_request(CURRENT, 0); |
| 1133 | return; |
| 1134 | } |
| 1135 | state = S_READ; |
| 1136 | timeout = READ_TIMEOUT; |
| 1137 | break; |
| 1138 | case S_READ: { |
| 1139 | struct cdrom_msf msf; |
| 1140 | if (!skip) { |
| 1141 | status = fetch_status(); |
| 1142 | if (status < 0) |
| 1143 | break; |
| 1144 | if (status & ST_DSK_CHG) { |
| 1145 | toc_uptodate = 0; |
| 1146 | opt_invalidate_buffers(); |
| 1147 | } |
| 1148 | } |
| 1149 | skip = 0; |
| 1150 | if ((status & ST_DOOR_OPEN) || (status & ST_DRVERR)) { |
| 1151 | toc_uptodate = 0; |
| 1152 | opt_invalidate_buffers(); |
| 1153 | printk(KERN_WARNING "optcd: %s\n", |
| 1154 | (status & ST_DOOR_OPEN) |
| 1155 | ? "door open" |
| 1156 | : "disk removed"); |
| 1157 | state = S_IDLE; |
| 1158 | while (current_valid()) |
| 1159 | end_request(CURRENT, 0); |
| 1160 | return; |
| 1161 | } |
| 1162 | if (!current_valid()) { |
| 1163 | state = S_STOP; |
| 1164 | loop_again = 1; |
| 1165 | break; |
| 1166 | } |
| 1167 | next_bn = CURRENT -> sector / 4; |
| 1168 | lba2msf(next_bn, &msf); |
| 1169 | read_count = N_BUFS; |
| 1170 | msf.cdmsf_frame1 = read_count; /* Not BCD! */ |
| 1171 | |
| 1172 | DEBUG((DEBUG_REQUEST, "reading %x:%x.%x %x:%x.%x", |
| 1173 | msf.cdmsf_min0, |
| 1174 | msf.cdmsf_sec0, |
| 1175 | msf.cdmsf_frame0, |
| 1176 | msf.cdmsf_min1, |
| 1177 | msf.cdmsf_sec1, |
| 1178 | msf.cdmsf_frame1)); |
| 1179 | DEBUG((DEBUG_REQUEST, "next_bn:%d buf_in:%d" |
| 1180 | " buf_out:%d buf_bn:%d", |
| 1181 | next_bn, |
| 1182 | buf_in, |
| 1183 | buf_out, |
| 1184 | buf_bn[buf_in])); |
| 1185 | |
| 1186 | exec_read_cmd(COMREAD, &msf); |
| 1187 | state = S_DATA; |
| 1188 | timeout = READ_TIMEOUT; |
| 1189 | break; |
| 1190 | } |
| 1191 | case S_DATA: |
| 1192 | flags = stdt_flags() & (FL_STEN|FL_DTEN); |
| 1193 | |
| 1194 | #if DEBUG_STATE |
| 1195 | if (flags != flags_old) { |
| 1196 | flags_old = flags; |
| 1197 | printk(KERN_DEBUG "optcd: flags:%x\n", flags); |
| 1198 | } |
| 1199 | if (flags == FL_STEN) |
| 1200 | printk(KERN_DEBUG "timeout cnt: %d\n", timeout); |
| 1201 | #endif |
| 1202 | |
| 1203 | switch (flags) { |
| 1204 | case FL_DTEN: /* only STEN low */ |
| 1205 | if (!tries--) { |
| 1206 | printk(KERN_ERR |
| 1207 | "optcd: read block %d failed; " |
| 1208 | "Giving up\n", next_bn); |
| 1209 | if (transfer_is_active) { |
| 1210 | tries = 0; |
| 1211 | break; |
| 1212 | } |
| 1213 | if (current_valid()) |
| 1214 | end_request(CURRENT, 0); |
| 1215 | tries = 5; |
| 1216 | } |
| 1217 | state = S_START; |
| 1218 | timeout = READ_TIMEOUT; |
| 1219 | loop_again = 1; |
| 1220 | case (FL_STEN|FL_DTEN): /* both high */ |
| 1221 | break; |
| 1222 | default: /* DTEN low */ |
| 1223 | tries = 5; |
| 1224 | if (!current_valid() && buf_in == buf_out) { |
| 1225 | state = S_STOP; |
| 1226 | loop_again = 1; |
| 1227 | break; |
| 1228 | } |
| 1229 | if (read_count<=0) |
| 1230 | printk(KERN_WARNING |
| 1231 | "optcd: warning - try to read" |
| 1232 | " 0 frames\n"); |
| 1233 | while (read_count) { |
| 1234 | buf_bn[buf_in] = NOBUF; |
| 1235 | if (!flag_low(FL_DTEN, BUSY_TIMEOUT)) { |
| 1236 | /* should be no waiting here!?? */ |
| 1237 | printk(KERN_ERR |
| 1238 | "read_count:%d " |
| 1239 | "CURRENT->nr_sectors:%ld " |
| 1240 | "buf_in:%d\n", |
| 1241 | read_count, |
| 1242 | CURRENT->nr_sectors, |
| 1243 | buf_in); |
| 1244 | printk(KERN_ERR |
| 1245 | "transfer active: %x\n", |
| 1246 | transfer_is_active); |
| 1247 | read_count = 0; |
| 1248 | state = S_STOP; |
| 1249 | loop_again = 1; |
| 1250 | end_request(CURRENT, 0); |
| 1251 | break; |
| 1252 | } |
| 1253 | fetch_data(buf+ |
| 1254 | CD_FRAMESIZE*buf_in, |
| 1255 | CD_FRAMESIZE); |
| 1256 | read_count--; |
| 1257 | |
| 1258 | DEBUG((DEBUG_REQUEST, |
| 1259 | "S_DATA; ---I've read data- " |
| 1260 | "read_count: %d", |
| 1261 | read_count)); |
| 1262 | DEBUG((DEBUG_REQUEST, |
| 1263 | "next_bn:%d buf_in:%d " |
| 1264 | "buf_out:%d buf_bn:%d", |
| 1265 | next_bn, |
| 1266 | buf_in, |
| 1267 | buf_out, |
| 1268 | buf_bn[buf_in])); |
| 1269 | |
| 1270 | buf_bn[buf_in] = next_bn++; |
| 1271 | if (buf_out == NOBUF) |
| 1272 | buf_out = buf_in; |
| 1273 | buf_in = buf_in + 1 == |
| 1274 | N_BUFS ? 0 : buf_in + 1; |
| 1275 | } |
| 1276 | if (!transfer_is_active) { |
| 1277 | while (current_valid()) { |
| 1278 | transfer(); |
| 1279 | if (CURRENT -> nr_sectors == 0) |
| 1280 | end_request(CURRENT, 1); |
| 1281 | else |
| 1282 | break; |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | if (current_valid() |
| 1287 | && (CURRENT -> sector / 4 < next_bn || |
| 1288 | CURRENT -> sector / 4 > |
| 1289 | next_bn + N_BUFS)) { |
| 1290 | state = S_STOP; |
| 1291 | loop_again = 1; |
| 1292 | break; |
| 1293 | } |
| 1294 | timeout = READ_TIMEOUT; |
| 1295 | if (read_count == 0) { |
| 1296 | state = S_STOP; |
| 1297 | loop_again = 1; |
| 1298 | break; |
| 1299 | } |
| 1300 | } |
| 1301 | break; |
| 1302 | case S_STOP: |
| 1303 | if (read_count != 0) |
| 1304 | printk(KERN_ERR |
| 1305 | "optcd: discard data=%x frames\n", |
| 1306 | read_count); |
| 1307 | flush_data(); |
| 1308 | if (send_cmd(COMDRVST)) { |
| 1309 | state = S_IDLE; |
| 1310 | while (current_valid()) |
| 1311 | end_request(CURRENT, 0); |
| 1312 | return; |
| 1313 | } |
| 1314 | state = S_STOPPING; |
| 1315 | timeout = STOP_TIMEOUT; |
| 1316 | break; |
| 1317 | case S_STOPPING: |
| 1318 | status = fetch_status(); |
| 1319 | if (status < 0 && timeout) |
| 1320 | break; |
| 1321 | if ((status >= 0) && (status & ST_DSK_CHG)) { |
| 1322 | toc_uptodate = 0; |
| 1323 | opt_invalidate_buffers(); |
| 1324 | } |
| 1325 | if (current_valid()) { |
| 1326 | if (status >= 0) { |
| 1327 | state = S_READ; |
| 1328 | loop_again = 1; |
| 1329 | skip = 1; |
| 1330 | break; |
| 1331 | } else { |
| 1332 | state = S_START; |
| 1333 | timeout = 1; |
| 1334 | } |
| 1335 | } else { |
| 1336 | state = S_IDLE; |
| 1337 | return; |
| 1338 | } |
| 1339 | break; |
| 1340 | default: |
| 1341 | printk(KERN_ERR "optcd: invalid state %d\n", state); |
| 1342 | return; |
| 1343 | } /* case */ |
| 1344 | } /* while */ |
| 1345 | |
| 1346 | if (!timeout--) { |
| 1347 | printk(KERN_ERR "optcd: timeout in state %d\n", state); |
| 1348 | state = S_STOP; |
| 1349 | if (exec_cmd(COMSTOP) < 0) { |
| 1350 | state = S_IDLE; |
| 1351 | while (current_valid()) |
| 1352 | end_request(CURRENT, 0); |
| 1353 | return; |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | mod_timer(&req_timer, jiffies + HZ/100); |
| 1358 | } |
| 1359 | |
| 1360 | |
| 1361 | static void do_optcd_request(request_queue_t * q) |
| 1362 | { |
| 1363 | DEBUG((DEBUG_REQUEST, "do_optcd_request(%ld+%ld)", |
| 1364 | CURRENT -> sector, CURRENT -> nr_sectors)); |
| 1365 | |
| 1366 | if (disk_info.audio) { |
| 1367 | printk(KERN_WARNING "optcd: tried to mount an Audio CD\n"); |
| 1368 | end_request(CURRENT, 0); |
| 1369 | return; |
| 1370 | } |
| 1371 | |
| 1372 | transfer_is_active = 1; |
| 1373 | while (current_valid()) { |
| 1374 | transfer(); /* First try to transfer block from buffers */ |
| 1375 | if (CURRENT -> nr_sectors == 0) { |
| 1376 | end_request(CURRENT, 1); |
| 1377 | } else { /* Want to read a block not in buffer */ |
| 1378 | buf_out = NOBUF; |
| 1379 | if (state == S_IDLE) { |
| 1380 | /* %% Should this block the request queue?? */ |
| 1381 | if (update_toc() < 0) { |
| 1382 | while (current_valid()) |
| 1383 | end_request(CURRENT, 0); |
| 1384 | break; |
| 1385 | } |
| 1386 | /* Start state machine */ |
| 1387 | state = S_START; |
| 1388 | timeout = READ_TIMEOUT; |
| 1389 | tries = 5; |
| 1390 | /* %% why not start right away?? */ |
| 1391 | mod_timer(&req_timer, jiffies + HZ/100); |
| 1392 | } |
| 1393 | break; |
| 1394 | } |
| 1395 | } |
| 1396 | transfer_is_active = 0; |
| 1397 | |
| 1398 | DEBUG((DEBUG_REQUEST, "next_bn:%d buf_in:%d buf_out:%d buf_bn:%d", |
| 1399 | next_bn, buf_in, buf_out, buf_bn[buf_in])); |
| 1400 | DEBUG((DEBUG_REQUEST, "do_optcd_request ends")); |
| 1401 | } |
| 1402 | |
| 1403 | /* IOCTLs */ |
| 1404 | |
| 1405 | |
| 1406 | static char auto_eject = 0; |
| 1407 | |
| 1408 | static int cdrompause(void) |
| 1409 | { |
| 1410 | int status; |
| 1411 | |
| 1412 | if (audio_status != CDROM_AUDIO_PLAY) |
| 1413 | return -EINVAL; |
| 1414 | |
| 1415 | status = exec_cmd(COMPAUSEON); |
| 1416 | if (status < 0) { |
| 1417 | DEBUG((DEBUG_VFS, "exec_cmd COMPAUSEON: %02x", -status)); |
| 1418 | return -EIO; |
| 1419 | } |
| 1420 | audio_status = CDROM_AUDIO_PAUSED; |
| 1421 | return 0; |
| 1422 | } |
| 1423 | |
| 1424 | |
| 1425 | static int cdromresume(void) |
| 1426 | { |
| 1427 | int status; |
| 1428 | |
| 1429 | if (audio_status != CDROM_AUDIO_PAUSED) |
| 1430 | return -EINVAL; |
| 1431 | |
| 1432 | status = exec_cmd(COMPAUSEOFF); |
| 1433 | if (status < 0) { |
| 1434 | DEBUG((DEBUG_VFS, "exec_cmd COMPAUSEOFF: %02x", -status)); |
| 1435 | audio_status = CDROM_AUDIO_ERROR; |
| 1436 | return -EIO; |
| 1437 | } |
| 1438 | audio_status = CDROM_AUDIO_PLAY; |
| 1439 | return 0; |
| 1440 | } |
| 1441 | |
| 1442 | |
| 1443 | static int cdromplaymsf(void __user *arg) |
| 1444 | { |
| 1445 | int status; |
| 1446 | struct cdrom_msf msf; |
| 1447 | |
| 1448 | if (copy_from_user(&msf, arg, sizeof msf)) |
| 1449 | return -EFAULT; |
| 1450 | |
| 1451 | bin2bcd(&msf); |
| 1452 | status = exec_long_cmd(COMPLAY, &msf); |
| 1453 | if (status < 0) { |
| 1454 | DEBUG((DEBUG_VFS, "exec_long_cmd COMPLAY: %02x", -status)); |
| 1455 | audio_status = CDROM_AUDIO_ERROR; |
| 1456 | return -EIO; |
| 1457 | } |
| 1458 | |
| 1459 | audio_status = CDROM_AUDIO_PLAY; |
| 1460 | return 0; |
| 1461 | } |
| 1462 | |
| 1463 | |
| 1464 | static int cdromplaytrkind(void __user *arg) |
| 1465 | { |
| 1466 | int status; |
| 1467 | struct cdrom_ti ti; |
| 1468 | struct cdrom_msf msf; |
| 1469 | |
| 1470 | if (copy_from_user(&ti, arg, sizeof ti)) |
| 1471 | return -EFAULT; |
| 1472 | |
| 1473 | if (ti.cdti_trk0 < disk_info.first |
| 1474 | || ti.cdti_trk0 > disk_info.last |
| 1475 | || ti.cdti_trk1 < ti.cdti_trk0) |
| 1476 | return -EINVAL; |
| 1477 | if (ti.cdti_trk1 > disk_info.last) |
| 1478 | ti.cdti_trk1 = disk_info.last; |
| 1479 | |
| 1480 | msf.cdmsf_min0 = toc[ti.cdti_trk0].cdsc_absaddr.msf.minute; |
| 1481 | msf.cdmsf_sec0 = toc[ti.cdti_trk0].cdsc_absaddr.msf.second; |
| 1482 | msf.cdmsf_frame0 = toc[ti.cdti_trk0].cdsc_absaddr.msf.frame; |
| 1483 | msf.cdmsf_min1 = toc[ti.cdti_trk1 + 1].cdsc_absaddr.msf.minute; |
| 1484 | msf.cdmsf_sec1 = toc[ti.cdti_trk1 + 1].cdsc_absaddr.msf.second; |
| 1485 | msf.cdmsf_frame1 = toc[ti.cdti_trk1 + 1].cdsc_absaddr.msf.frame; |
| 1486 | |
| 1487 | DEBUG((DEBUG_VFS, "play %02d:%02d.%02d to %02d:%02d.%02d", |
| 1488 | msf.cdmsf_min0, |
| 1489 | msf.cdmsf_sec0, |
| 1490 | msf.cdmsf_frame0, |
| 1491 | msf.cdmsf_min1, |
| 1492 | msf.cdmsf_sec1, |
| 1493 | msf.cdmsf_frame1)); |
| 1494 | |
| 1495 | bin2bcd(&msf); |
| 1496 | status = exec_long_cmd(COMPLAY, &msf); |
| 1497 | if (status < 0) { |
| 1498 | DEBUG((DEBUG_VFS, "exec_long_cmd COMPLAY: %02x", -status)); |
| 1499 | audio_status = CDROM_AUDIO_ERROR; |
| 1500 | return -EIO; |
| 1501 | } |
| 1502 | |
| 1503 | audio_status = CDROM_AUDIO_PLAY; |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
| 1507 | |
| 1508 | static int cdromreadtochdr(void __user *arg) |
| 1509 | { |
| 1510 | struct cdrom_tochdr tochdr; |
| 1511 | |
| 1512 | tochdr.cdth_trk0 = disk_info.first; |
| 1513 | tochdr.cdth_trk1 = disk_info.last; |
| 1514 | |
| 1515 | return copy_to_user(arg, &tochdr, sizeof tochdr) ? -EFAULT : 0; |
| 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | static int cdromreadtocentry(void __user *arg) |
| 1520 | { |
| 1521 | struct cdrom_tocentry entry; |
| 1522 | struct cdrom_subchnl *tocptr; |
| 1523 | |
| 1524 | if (copy_from_user(&entry, arg, sizeof entry)) |
| 1525 | return -EFAULT; |
| 1526 | |
| 1527 | if (entry.cdte_track == CDROM_LEADOUT) |
| 1528 | tocptr = &toc[disk_info.last + 1]; |
| 1529 | else if (entry.cdte_track > disk_info.last |
| 1530 | || entry.cdte_track < disk_info.first) |
| 1531 | return -EINVAL; |
| 1532 | else |
| 1533 | tocptr = &toc[entry.cdte_track]; |
| 1534 | |
| 1535 | entry.cdte_adr = tocptr->cdsc_adr; |
| 1536 | entry.cdte_ctrl = tocptr->cdsc_ctrl; |
| 1537 | entry.cdte_addr.msf.minute = tocptr->cdsc_absaddr.msf.minute; |
| 1538 | entry.cdte_addr.msf.second = tocptr->cdsc_absaddr.msf.second; |
| 1539 | entry.cdte_addr.msf.frame = tocptr->cdsc_absaddr.msf.frame; |
| 1540 | /* %% What should go into entry.cdte_datamode? */ |
| 1541 | |
| 1542 | if (entry.cdte_format == CDROM_LBA) |
| 1543 | msf2lba(&entry.cdte_addr); |
| 1544 | else if (entry.cdte_format != CDROM_MSF) |
| 1545 | return -EINVAL; |
| 1546 | |
| 1547 | return copy_to_user(arg, &entry, sizeof entry) ? -EFAULT : 0; |
| 1548 | } |
| 1549 | |
| 1550 | |
| 1551 | static int cdromvolctrl(void __user *arg) |
| 1552 | { |
| 1553 | int status; |
| 1554 | struct cdrom_volctrl volctrl; |
| 1555 | struct cdrom_msf msf; |
| 1556 | |
| 1557 | if (copy_from_user(&volctrl, arg, sizeof volctrl)) |
| 1558 | return -EFAULT; |
| 1559 | |
| 1560 | msf.cdmsf_min0 = 0x10; |
| 1561 | msf.cdmsf_sec0 = 0x32; |
| 1562 | msf.cdmsf_frame0 = volctrl.channel0; |
| 1563 | msf.cdmsf_min1 = volctrl.channel1; |
| 1564 | msf.cdmsf_sec1 = volctrl.channel2; |
| 1565 | msf.cdmsf_frame1 = volctrl.channel3; |
| 1566 | |
| 1567 | status = exec_long_cmd(COMCHCTRL, &msf); |
| 1568 | if (status < 0) { |
| 1569 | DEBUG((DEBUG_VFS, "exec_long_cmd COMCHCTRL: %02x", -status)); |
| 1570 | return -EIO; |
| 1571 | } |
| 1572 | return 0; |
| 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | static int cdromsubchnl(void __user *arg) |
| 1577 | { |
| 1578 | int status; |
| 1579 | struct cdrom_subchnl subchnl; |
| 1580 | |
| 1581 | if (copy_from_user(&subchnl, arg, sizeof subchnl)) |
| 1582 | return -EFAULT; |
| 1583 | |
| 1584 | if (subchnl.cdsc_format != CDROM_LBA |
| 1585 | && subchnl.cdsc_format != CDROM_MSF) |
| 1586 | return -EINVAL; |
| 1587 | |
| 1588 | status = get_q_channel(&subchnl); |
| 1589 | if (status < 0) { |
| 1590 | DEBUG((DEBUG_VFS, "get_q_channel: %02x", -status)); |
| 1591 | return -EIO; |
| 1592 | } |
| 1593 | |
| 1594 | if (copy_to_user(arg, &subchnl, sizeof subchnl)) |
| 1595 | return -EFAULT; |
| 1596 | return 0; |
| 1597 | } |
| 1598 | |
| 1599 | |
| 1600 | static struct gendisk *optcd_disk; |
| 1601 | |
| 1602 | |
| 1603 | static int cdromread(void __user *arg, int blocksize, int cmd) |
| 1604 | { |
| 1605 | int status; |
| 1606 | struct cdrom_msf msf; |
| 1607 | |
| 1608 | if (copy_from_user(&msf, arg, sizeof msf)) |
| 1609 | return -EFAULT; |
| 1610 | |
| 1611 | bin2bcd(&msf); |
| 1612 | msf.cdmsf_min1 = 0; |
| 1613 | msf.cdmsf_sec1 = 0; |
| 1614 | msf.cdmsf_frame1 = 1; /* read only one frame */ |
| 1615 | status = exec_read_cmd(cmd, &msf); |
| 1616 | |
| 1617 | DEBUG((DEBUG_VFS, "read cmd status 0x%x", status)); |
| 1618 | |
| 1619 | if (!sleep_flag_low(FL_DTEN, SLEEP_TIMEOUT)) |
| 1620 | return -EIO; |
| 1621 | |
| 1622 | fetch_data(optcd_disk->private_data, blocksize); |
| 1623 | |
| 1624 | if (copy_to_user(arg, optcd_disk->private_data, blocksize)) |
| 1625 | return -EFAULT; |
| 1626 | |
| 1627 | return 0; |
| 1628 | } |
| 1629 | |
| 1630 | |
| 1631 | static int cdromseek(void __user *arg) |
| 1632 | { |
| 1633 | int status; |
| 1634 | struct cdrom_msf msf; |
| 1635 | |
| 1636 | if (copy_from_user(&msf, arg, sizeof msf)) |
| 1637 | return -EFAULT; |
| 1638 | |
| 1639 | bin2bcd(&msf); |
| 1640 | status = exec_seek_cmd(COMSEEK, &msf); |
| 1641 | |
| 1642 | DEBUG((DEBUG_VFS, "COMSEEK status 0x%x", status)); |
| 1643 | |
| 1644 | if (status < 0) |
| 1645 | return -EIO; |
| 1646 | return 0; |
| 1647 | } |
| 1648 | |
| 1649 | |
| 1650 | #ifdef MULTISESSION |
| 1651 | static int cdrommultisession(void __user *arg) |
| 1652 | { |
| 1653 | struct cdrom_multisession ms; |
| 1654 | |
| 1655 | if (copy_from_user(&ms, arg, sizeof ms)) |
| 1656 | return -EFAULT; |
| 1657 | |
| 1658 | ms.addr.msf.minute = disk_info.last_session.minute; |
| 1659 | ms.addr.msf.second = disk_info.last_session.second; |
| 1660 | ms.addr.msf.frame = disk_info.last_session.frame; |
| 1661 | |
| 1662 | if (ms.addr_format != CDROM_LBA |
| 1663 | && ms.addr_format != CDROM_MSF) |
| 1664 | return -EINVAL; |
| 1665 | if (ms.addr_format == CDROM_LBA) |
| 1666 | msf2lba(&ms.addr); |
| 1667 | |
| 1668 | ms.xa_flag = disk_info.xa; |
| 1669 | |
| 1670 | if (copy_to_user(arg, &ms, sizeof(struct cdrom_multisession))) |
| 1671 | return -EFAULT; |
| 1672 | |
| 1673 | #if DEBUG_MULTIS |
| 1674 | if (ms.addr_format == CDROM_MSF) |
| 1675 | printk(KERN_DEBUG |
| 1676 | "optcd: multisession xa:%d, msf:%02d:%02d.%02d\n", |
| 1677 | ms.xa_flag, |
| 1678 | ms.addr.msf.minute, |
| 1679 | ms.addr.msf.second, |
| 1680 | ms.addr.msf.frame); |
| 1681 | else |
| 1682 | printk(KERN_DEBUG |
| 1683 | "optcd: multisession %d, lba:0x%08x [%02d:%02d.%02d])\n", |
| 1684 | ms.xa_flag, |
| 1685 | ms.addr.lba, |
| 1686 | disk_info.last_session.minute, |
| 1687 | disk_info.last_session.second, |
| 1688 | disk_info.last_session.frame); |
| 1689 | #endif /* DEBUG_MULTIS */ |
| 1690 | |
| 1691 | return 0; |
| 1692 | } |
| 1693 | #endif /* MULTISESSION */ |
| 1694 | |
| 1695 | |
| 1696 | static int cdromreset(void) |
| 1697 | { |
| 1698 | if (state != S_IDLE) { |
| 1699 | error = 1; |
| 1700 | tries = 0; |
| 1701 | } |
| 1702 | |
| 1703 | toc_uptodate = 0; |
| 1704 | disk_changed = 1; |
| 1705 | opt_invalidate_buffers(); |
| 1706 | audio_status = CDROM_AUDIO_NO_STATUS; |
| 1707 | |
| 1708 | if (!reset_drive()) |
| 1709 | return -EIO; |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | /* VFS calls */ |
| 1714 | |
| 1715 | |
| 1716 | static int opt_ioctl(struct inode *ip, struct file *fp, |
| 1717 | unsigned int cmd, unsigned long arg) |
| 1718 | { |
| 1719 | int status, err, retval = 0; |
| 1720 | void __user *argp = (void __user *)arg; |
| 1721 | |
| 1722 | DEBUG((DEBUG_VFS, "starting opt_ioctl")); |
| 1723 | |
| 1724 | if (!ip) |
| 1725 | return -EINVAL; |
| 1726 | |
| 1727 | if (cmd == CDROMRESET) |
| 1728 | return cdromreset(); |
| 1729 | |
| 1730 | /* is do_optcd_request or another ioctl busy? */ |
| 1731 | if (state != S_IDLE || in_vfs) |
| 1732 | return -EBUSY; |
| 1733 | |
| 1734 | in_vfs = 1; |
| 1735 | |
| 1736 | status = drive_status(); |
| 1737 | if (status < 0) { |
| 1738 | DEBUG((DEBUG_VFS, "drive_status: %02x", -status)); |
| 1739 | in_vfs = 0; |
| 1740 | return -EIO; |
| 1741 | } |
| 1742 | |
| 1743 | if (status & ST_DOOR_OPEN) |
| 1744 | switch (cmd) { /* Actions that can be taken with door open */ |
| 1745 | case CDROMCLOSETRAY: |
| 1746 | /* We do this before trying to read the toc. */ |
| 1747 | err = exec_cmd(COMCLOSE); |
| 1748 | if (err < 0) { |
| 1749 | DEBUG((DEBUG_VFS, |
| 1750 | "exec_cmd COMCLOSE: %02x", -err)); |
| 1751 | in_vfs = 0; |
| 1752 | return -EIO; |
| 1753 | } |
| 1754 | break; |
| 1755 | default: in_vfs = 0; |
| 1756 | return -EBUSY; |
| 1757 | } |
| 1758 | |
| 1759 | err = update_toc(); |
| 1760 | if (err < 0) { |
| 1761 | DEBUG((DEBUG_VFS, "update_toc: %02x", -err)); |
| 1762 | in_vfs = 0; |
| 1763 | return -EIO; |
| 1764 | } |
| 1765 | |
| 1766 | DEBUG((DEBUG_VFS, "ioctl cmd 0x%x", cmd)); |
| 1767 | |
| 1768 | switch (cmd) { |
| 1769 | case CDROMPAUSE: retval = cdrompause(); break; |
| 1770 | case CDROMRESUME: retval = cdromresume(); break; |
| 1771 | case CDROMPLAYMSF: retval = cdromplaymsf(argp); break; |
| 1772 | case CDROMPLAYTRKIND: retval = cdromplaytrkind(argp); break; |
| 1773 | case CDROMREADTOCHDR: retval = cdromreadtochdr(argp); break; |
| 1774 | case CDROMREADTOCENTRY: retval = cdromreadtocentry(argp); break; |
| 1775 | |
| 1776 | case CDROMSTOP: err = exec_cmd(COMSTOP); |
| 1777 | if (err < 0) { |
| 1778 | DEBUG((DEBUG_VFS, |
| 1779 | "exec_cmd COMSTOP: %02x", |
| 1780 | -err)); |
| 1781 | retval = -EIO; |
| 1782 | } else |
| 1783 | audio_status = CDROM_AUDIO_NO_STATUS; |
| 1784 | break; |
| 1785 | case CDROMSTART: break; /* This is a no-op */ |
| 1786 | case CDROMEJECT: err = exec_cmd(COMUNLOCK); |
| 1787 | if (err < 0) { |
| 1788 | DEBUG((DEBUG_VFS, |
| 1789 | "exec_cmd COMUNLOCK: %02x", |
| 1790 | -err)); |
| 1791 | retval = -EIO; |
| 1792 | break; |
| 1793 | } |
| 1794 | err = exec_cmd(COMOPEN); |
| 1795 | if (err < 0) { |
| 1796 | DEBUG((DEBUG_VFS, |
| 1797 | "exec_cmd COMOPEN: %02x", |
| 1798 | -err)); |
| 1799 | retval = -EIO; |
| 1800 | } |
| 1801 | break; |
| 1802 | |
| 1803 | case CDROMVOLCTRL: retval = cdromvolctrl(argp); break; |
| 1804 | case CDROMSUBCHNL: retval = cdromsubchnl(argp); break; |
| 1805 | |
| 1806 | /* The drive detects the mode and automatically delivers the |
| 1807 | correct 2048 bytes, so we don't need these IOCTLs */ |
| 1808 | case CDROMREADMODE2: retval = -EINVAL; break; |
| 1809 | case CDROMREADMODE1: retval = -EINVAL; break; |
| 1810 | |
| 1811 | /* Drive doesn't support reading audio */ |
| 1812 | case CDROMREADAUDIO: retval = -EINVAL; break; |
| 1813 | |
| 1814 | case CDROMEJECT_SW: auto_eject = (char) arg; |
| 1815 | break; |
| 1816 | |
| 1817 | #ifdef MULTISESSION |
| 1818 | case CDROMMULTISESSION: retval = cdrommultisession(argp); break; |
| 1819 | #endif |
| 1820 | |
| 1821 | case CDROM_GET_MCN: retval = -EINVAL; break; /* not implemented */ |
| 1822 | case CDROMVOLREAD: retval = -EINVAL; break; /* not implemented */ |
| 1823 | |
| 1824 | case CDROMREADRAW: |
| 1825 | /* this drive delivers 2340 bytes in raw mode */ |
| 1826 | retval = cdromread(argp, CD_FRAMESIZE_RAW1, COMREADRAW); |
| 1827 | break; |
| 1828 | case CDROMREADCOOKED: |
| 1829 | retval = cdromread(argp, CD_FRAMESIZE, COMREAD); |
| 1830 | break; |
| 1831 | case CDROMREADALL: |
| 1832 | retval = cdromread(argp, CD_FRAMESIZE_RAWER, COMREADALL); |
| 1833 | break; |
| 1834 | |
| 1835 | case CDROMSEEK: retval = cdromseek(argp); break; |
| 1836 | case CDROMPLAYBLK: retval = -EINVAL; break; /* not implemented */ |
| 1837 | case CDROMCLOSETRAY: break; /* The action was taken earlier */ |
| 1838 | default: retval = -EINVAL; |
| 1839 | } |
| 1840 | in_vfs = 0; |
| 1841 | return retval; |
| 1842 | } |
| 1843 | |
| 1844 | |
| 1845 | static int open_count = 0; |
| 1846 | |
| 1847 | /* Open device special file; check that a disk is in. */ |
| 1848 | static int opt_open(struct inode *ip, struct file *fp) |
| 1849 | { |
| 1850 | DEBUG((DEBUG_VFS, "starting opt_open")); |
| 1851 | |
| 1852 | if (!open_count && state == S_IDLE) { |
| 1853 | int status; |
| 1854 | char *buf; |
| 1855 | |
| 1856 | buf = kmalloc(CD_FRAMESIZE_RAWER, GFP_KERNEL); |
| 1857 | if (!buf) { |
| 1858 | printk(KERN_INFO "optcd: cannot allocate read buffer\n"); |
| 1859 | return -ENOMEM; |
| 1860 | } |
| 1861 | optcd_disk->private_data = buf; /* save read buffer */ |
| 1862 | |
| 1863 | toc_uptodate = 0; |
| 1864 | opt_invalidate_buffers(); |
| 1865 | |
| 1866 | status = exec_cmd(COMCLOSE); /* close door */ |
| 1867 | if (status < 0) { |
| 1868 | DEBUG((DEBUG_VFS, "exec_cmd COMCLOSE: %02x", -status)); |
| 1869 | } |
| 1870 | |
| 1871 | status = drive_status(); |
| 1872 | if (status < 0) { |
| 1873 | DEBUG((DEBUG_VFS, "drive_status: %02x", -status)); |
| 1874 | goto err_out; |
| 1875 | } |
| 1876 | DEBUG((DEBUG_VFS, "status: %02x", status)); |
| 1877 | if ((status & ST_DOOR_OPEN) || (status & ST_DRVERR)) { |
| 1878 | printk(KERN_INFO "optcd: no disk or door open\n"); |
| 1879 | goto err_out; |
| 1880 | } |
| 1881 | status = exec_cmd(COMLOCK); /* Lock door */ |
| 1882 | if (status < 0) { |
| 1883 | DEBUG((DEBUG_VFS, "exec_cmd COMLOCK: %02x", -status)); |
| 1884 | } |
| 1885 | status = update_toc(); /* Read table of contents */ |
| 1886 | if (status < 0) { |
| 1887 | DEBUG((DEBUG_VFS, "update_toc: %02x", -status)); |
| 1888 | status = exec_cmd(COMUNLOCK); /* Unlock door */ |
| 1889 | if (status < 0) { |
| 1890 | DEBUG((DEBUG_VFS, |
| 1891 | "exec_cmd COMUNLOCK: %02x", -status)); |
| 1892 | } |
| 1893 | goto err_out; |
| 1894 | } |
| 1895 | open_count++; |
| 1896 | } |
| 1897 | |
| 1898 | DEBUG((DEBUG_VFS, "exiting opt_open")); |
| 1899 | |
| 1900 | return 0; |
| 1901 | |
| 1902 | err_out: |
| 1903 | return -EIO; |
| 1904 | } |
| 1905 | |
| 1906 | |
| 1907 | /* Release device special file; flush all blocks from the buffer cache */ |
| 1908 | static int opt_release(struct inode *ip, struct file *fp) |
| 1909 | { |
| 1910 | int status; |
| 1911 | |
| 1912 | DEBUG((DEBUG_VFS, "executing opt_release")); |
| 1913 | DEBUG((DEBUG_VFS, "inode: %p, device: %s, file: %p\n", |
| 1914 | ip, ip->i_bdev->bd_disk->disk_name, fp)); |
| 1915 | |
| 1916 | if (!--open_count) { |
| 1917 | toc_uptodate = 0; |
| 1918 | opt_invalidate_buffers(); |
| 1919 | status = exec_cmd(COMUNLOCK); /* Unlock door */ |
| 1920 | if (status < 0) { |
| 1921 | DEBUG((DEBUG_VFS, "exec_cmd COMUNLOCK: %02x", -status)); |
| 1922 | } |
| 1923 | if (auto_eject) { |
| 1924 | status = exec_cmd(COMOPEN); |
| 1925 | DEBUG((DEBUG_VFS, "exec_cmd COMOPEN: %02x", -status)); |
| 1926 | } |
| 1927 | kfree(optcd_disk->private_data); |
| 1928 | del_timer(&delay_timer); |
| 1929 | del_timer(&req_timer); |
| 1930 | } |
| 1931 | return 0; |
| 1932 | } |
| 1933 | |
| 1934 | |
| 1935 | /* Check if disk has been changed */ |
| 1936 | static int opt_media_change(struct gendisk *disk) |
| 1937 | { |
| 1938 | DEBUG((DEBUG_VFS, "executing opt_media_change")); |
| 1939 | DEBUG((DEBUG_VFS, "dev: %s; disk_changed = %d\n", |
| 1940 | disk->disk_name, disk_changed)); |
| 1941 | |
| 1942 | if (disk_changed) { |
| 1943 | disk_changed = 0; |
| 1944 | return 1; |
| 1945 | } |
| 1946 | return 0; |
| 1947 | } |
| 1948 | |
| 1949 | /* Driver initialisation */ |
| 1950 | |
| 1951 | |
| 1952 | /* Returns 1 if a drive is detected with a version string |
| 1953 | starting with "DOLPHIN". Otherwise 0. */ |
| 1954 | static int __init version_ok(void) |
| 1955 | { |
| 1956 | char devname[100]; |
| 1957 | int count, i, ch, status; |
| 1958 | |
| 1959 | status = exec_cmd(COMVERSION); |
| 1960 | if (status < 0) { |
| 1961 | DEBUG((DEBUG_VFS, "exec_cmd COMVERSION: %02x", -status)); |
| 1962 | return 0; |
| 1963 | } |
| 1964 | if ((count = get_data(1)) < 0) { |
| 1965 | DEBUG((DEBUG_VFS, "get_data(1): %02x", -count)); |
| 1966 | return 0; |
| 1967 | } |
| 1968 | for (i = 0, ch = -1; count > 0; count--) { |
| 1969 | if ((ch = get_data(1)) < 0) { |
| 1970 | DEBUG((DEBUG_VFS, "get_data(1): %02x", -ch)); |
| 1971 | break; |
| 1972 | } |
| 1973 | if (i < 99) |
| 1974 | devname[i++] = ch; |
| 1975 | } |
| 1976 | devname[i] = '\0'; |
| 1977 | if (ch < 0) |
| 1978 | return 0; |
| 1979 | |
| 1980 | printk(KERN_INFO "optcd: Device %s detected\n", devname); |
| 1981 | return ((devname[0] == 'D') |
| 1982 | && (devname[1] == 'O') |
| 1983 | && (devname[2] == 'L') |
| 1984 | && (devname[3] == 'P') |
| 1985 | && (devname[4] == 'H') |
| 1986 | && (devname[5] == 'I') |
| 1987 | && (devname[6] == 'N')); |
| 1988 | } |
| 1989 | |
| 1990 | |
| 1991 | static struct block_device_operations opt_fops = { |
| 1992 | .owner = THIS_MODULE, |
| 1993 | .open = opt_open, |
| 1994 | .release = opt_release, |
| 1995 | .ioctl = opt_ioctl, |
| 1996 | .media_changed = opt_media_change, |
| 1997 | }; |
| 1998 | |
| 1999 | #ifndef MODULE |
| 2000 | /* Get kernel parameter when used as a kernel driver */ |
| 2001 | static int optcd_setup(char *str) |
| 2002 | { |
| 2003 | int ints[4]; |
| 2004 | (void)get_options(str, ARRAY_SIZE(ints), ints); |
| 2005 | |
| 2006 | if (ints[0] > 0) |
| 2007 | optcd_port = ints[1]; |
| 2008 | |
| 2009 | return 1; |
| 2010 | } |
| 2011 | |
| 2012 | __setup("optcd=", optcd_setup); |
| 2013 | |
| 2014 | #endif /* MODULE */ |
| 2015 | |
| 2016 | /* Test for presence of drive and initialize it. Called at boot time |
| 2017 | or during module initialisation. */ |
| 2018 | static int __init optcd_init(void) |
| 2019 | { |
| 2020 | int status; |
| 2021 | |
| 2022 | if (optcd_port <= 0) { |
| 2023 | printk(KERN_INFO |
| 2024 | "optcd: no Optics Storage CDROM Initialization\n"); |
| 2025 | return -EIO; |
| 2026 | } |
| 2027 | optcd_disk = alloc_disk(1); |
| 2028 | if (!optcd_disk) { |
| 2029 | printk(KERN_ERR "optcd: can't allocate disk\n"); |
| 2030 | return -ENOMEM; |
| 2031 | } |
| 2032 | optcd_disk->major = MAJOR_NR; |
| 2033 | optcd_disk->first_minor = 0; |
| 2034 | optcd_disk->fops = &opt_fops; |
| 2035 | sprintf(optcd_disk->disk_name, "optcd"); |
| 2036 | sprintf(optcd_disk->devfs_name, "optcd"); |
| 2037 | |
| 2038 | if (!request_region(optcd_port, 4, "optcd")) { |
| 2039 | printk(KERN_ERR "optcd: conflict, I/O port 0x%x already used\n", |
| 2040 | optcd_port); |
| 2041 | put_disk(optcd_disk); |
| 2042 | return -EIO; |
| 2043 | } |
| 2044 | |
| 2045 | if (!reset_drive()) { |
| 2046 | printk(KERN_ERR "optcd: drive at 0x%x not ready\n", optcd_port); |
| 2047 | release_region(optcd_port, 4); |
| 2048 | put_disk(optcd_disk); |
| 2049 | return -EIO; |
| 2050 | } |
| 2051 | if (!version_ok()) { |
| 2052 | printk(KERN_ERR "optcd: unknown drive detected; aborting\n"); |
| 2053 | release_region(optcd_port, 4); |
| 2054 | put_disk(optcd_disk); |
| 2055 | return -EIO; |
| 2056 | } |
| 2057 | status = exec_cmd(COMINITDOUBLE); |
| 2058 | if (status < 0) { |
| 2059 | printk(KERN_ERR "optcd: cannot init double speed mode\n"); |
| 2060 | release_region(optcd_port, 4); |
| 2061 | DEBUG((DEBUG_VFS, "exec_cmd COMINITDOUBLE: %02x", -status)); |
| 2062 | put_disk(optcd_disk); |
| 2063 | return -EIO; |
| 2064 | } |
| 2065 | if (register_blkdev(MAJOR_NR, "optcd")) { |
| 2066 | release_region(optcd_port, 4); |
| 2067 | put_disk(optcd_disk); |
| 2068 | return -EIO; |
| 2069 | } |
| 2070 | |
| 2071 | |
| 2072 | opt_queue = blk_init_queue(do_optcd_request, &optcd_lock); |
| 2073 | if (!opt_queue) { |
| 2074 | unregister_blkdev(MAJOR_NR, "optcd"); |
| 2075 | release_region(optcd_port, 4); |
| 2076 | put_disk(optcd_disk); |
| 2077 | return -ENOMEM; |
| 2078 | } |
| 2079 | |
| 2080 | blk_queue_hardsect_size(opt_queue, 2048); |
| 2081 | optcd_disk->queue = opt_queue; |
| 2082 | add_disk(optcd_disk); |
| 2083 | |
| 2084 | printk(KERN_INFO "optcd: DOLPHIN 8000 AT CDROM at 0x%x\n", optcd_port); |
| 2085 | return 0; |
| 2086 | } |
| 2087 | |
| 2088 | |
| 2089 | static void __exit optcd_exit(void) |
| 2090 | { |
| 2091 | del_gendisk(optcd_disk); |
| 2092 | put_disk(optcd_disk); |
| 2093 | if (unregister_blkdev(MAJOR_NR, "optcd") == -EINVAL) { |
| 2094 | printk(KERN_ERR "optcd: what's that: can't unregister\n"); |
| 2095 | return; |
| 2096 | } |
| 2097 | blk_cleanup_queue(opt_queue); |
| 2098 | release_region(optcd_port, 4); |
| 2099 | printk(KERN_INFO "optcd: module released.\n"); |
| 2100 | } |
| 2101 | |
| 2102 | module_init(optcd_init); |
| 2103 | module_exit(optcd_exit); |
| 2104 | |
| 2105 | MODULE_LICENSE("GPL"); |
| 2106 | MODULE_ALIAS_BLOCKDEV_MAJOR(OPTICS_CDROM_MAJOR); |