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1da177e4 LT |
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 | \f | |
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 | \f | |
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 | \f | |
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 | \f | |
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 | \f | |
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. */ | |
77933d72 | 248 | static inline int flag_low(int flag, unsigned long timeout) |
1da177e4 LT |
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); | |
8d06afab | 267 | static DEFINE_TIMER(delay_timer, sleep_timer, 0, 0); |
1da177e4 LT |
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 | \f | |
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. */ | |
77933d72 | 384 | static inline int get_exec_status(int busy_waiting) |
1da177e4 LT |
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. */ | |
77933d72 | 401 | static inline int get_data(int short_timeout) |
1da177e4 LT |
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 */ | |
77933d72 | 444 | static inline int stdt_flags(void) |
1da177e4 LT |
445 | { |
446 | return inb(STATUS_PORT) & FL_STDT; | |
447 | } | |
448 | ||
449 | ||
450 | /* Fetch status that has previously been waited for. <0 means not available */ | |
77933d72 | 451 | static inline int fetch_status(void) |
1da177e4 LT |
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. */ | |
77933d72 | 465 | static inline void fetch_data(char *buf, int n) |
1da177e4 LT |
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 */ | |
77933d72 | 473 | static inline void flush_data(void) |
1da177e4 LT |
474 | { |
475 | while ((inb(STATUS_PORT) & FL_STDT) != FL_STDT) | |
476 | inb(DATA_PORT); | |
477 | DEBUG((DEBUG_DRIVE_IF, "flushed fifos")); | |
478 | } | |
479 | \f | |
480 | /* Command protocol */ | |
481 | ||
482 | ||
483 | /* Send a simple command and wait for response. Command codes < COMFETCH | |
484 | are quick response commands */ | |
77933d72 | 485 | static inline int exec_cmd(int cmd) |
1da177e4 LT |
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. */ | |
77933d72 | 496 | static inline int exec_read_cmd(int cmd, struct cdrom_msf *params) |
1da177e4 LT |
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 */ | |
77933d72 | 506 | static inline int exec_seek_cmd(int cmd, struct cdrom_msf *params) |
1da177e4 LT |
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 */ | |
77933d72 | 519 | static inline int exec_long_cmd(int cmd, struct cdrom_msf *params) |
1da177e4 LT |
520 | { |
521 | int ack = exec_read_cmd(cmd, params); | |
522 | if (ack < 0) | |
523 | return ack; | |
524 | return get_exec_status(0); | |
525 | } | |
526 | \f | |
527 | /* Address conversion routines */ | |
528 | ||
529 | ||
530 | /* Binary to BCD (2 digits) */ | |
77933d72 | 531 | static inline void single_bin2bcd(u_char *p) |
1da177e4 LT |
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 */ | |
77933d72 | 568 | static inline u_char bcd2bin(u_char bcd) |
1da177e4 LT |
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 | \f | |
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 | \f | |
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 | \f | |
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 | ||
77933d72 | 991 | static inline void opt_invalidate_buffers(void) |
1da177e4 LT |
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 | \f | |
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 | \f | |
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 | \f | |
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); |