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1da177e4 LT |
1 | /* |
2 | pcd.c (c) 1997-8 Grant R. Guenther <grant@torque.net> | |
3 | Under the terms of the GNU General Public License. | |
4 | ||
5 | This is a high-level driver for parallel port ATAPI CD-ROM | |
6 | drives based on chips supported by the paride module. | |
7 | ||
8 | By default, the driver will autoprobe for a single parallel | |
9 | port ATAPI CD-ROM drive, but if their individual parameters are | |
10 | specified, the driver can handle up to 4 drives. | |
11 | ||
12 | The behaviour of the pcd driver can be altered by setting | |
13 | some parameters from the insmod command line. The following | |
14 | parameters are adjustable: | |
15 | ||
16 | drive0 These four arguments can be arrays of | |
17 | drive1 1-6 integers as follows: | |
18 | drive2 | |
19 | drive3 <prt>,<pro>,<uni>,<mod>,<slv>,<dly> | |
20 | ||
21 | Where, | |
22 | ||
23 | <prt> is the base of the parallel port address for | |
24 | the corresponding drive. (required) | |
25 | ||
26 | <pro> is the protocol number for the adapter that | |
27 | supports this drive. These numbers are | |
28 | logged by 'paride' when the protocol modules | |
29 | are initialised. (0 if not given) | |
30 | ||
31 | <uni> for those adapters that support chained | |
32 | devices, this is the unit selector for the | |
33 | chain of devices on the given port. It should | |
34 | be zero for devices that don't support chaining. | |
35 | (0 if not given) | |
36 | ||
37 | <mod> this can be -1 to choose the best mode, or one | |
38 | of the mode numbers supported by the adapter. | |
39 | (-1 if not given) | |
40 | ||
41 | <slv> ATAPI CD-ROMs can be jumpered to master or slave. | |
42 | Set this to 0 to choose the master drive, 1 to | |
43 | choose the slave, -1 (the default) to choose the | |
44 | first drive found. | |
45 | ||
46 | <dly> some parallel ports require the driver to | |
47 | go more slowly. -1 sets a default value that | |
48 | should work with the chosen protocol. Otherwise, | |
49 | set this to a small integer, the larger it is | |
50 | the slower the port i/o. In some cases, setting | |
51 | this to zero will speed up the device. (default -1) | |
52 | ||
53 | major You may use this parameter to overide the | |
54 | default major number (46) that this driver | |
55 | will use. Be sure to change the device | |
56 | name as well. | |
57 | ||
58 | name This parameter is a character string that | |
59 | contains the name the kernel will use for this | |
60 | device (in /proc output, for instance). | |
61 | (default "pcd") | |
62 | ||
63 | verbose This parameter controls the amount of logging | |
64 | that the driver will do. Set it to 0 for | |
65 | normal operation, 1 to see autoprobe progress | |
66 | messages, or 2 to see additional debugging | |
67 | output. (default 0) | |
68 | ||
69 | nice This parameter controls the driver's use of | |
70 | idle CPU time, at the expense of some speed. | |
71 | ||
72 | If this driver is built into the kernel, you can use kernel | |
73 | the following command line parameters, with the same values | |
74 | as the corresponding module parameters listed above: | |
75 | ||
76 | pcd.drive0 | |
77 | pcd.drive1 | |
78 | pcd.drive2 | |
79 | pcd.drive3 | |
80 | pcd.nice | |
81 | ||
82 | In addition, you can use the parameter pcd.disable to disable | |
83 | the driver entirely. | |
84 | ||
85 | */ | |
86 | ||
87 | /* Changes: | |
88 | ||
89 | 1.01 GRG 1998.01.24 Added test unit ready support | |
90 | 1.02 GRG 1998.05.06 Changes to pcd_completion, ready_wait, | |
91 | and loosen interpretation of ATAPI | |
92 | standard for clearing error status. | |
93 | Use spinlocks. Eliminate sti(). | |
94 | 1.03 GRG 1998.06.16 Eliminated an Ugh | |
95 | 1.04 GRG 1998.08.15 Added extra debugging, improvements to | |
96 | pcd_completion, use HZ in loop timing | |
97 | 1.05 GRG 1998.08.16 Conformed to "Uniform CD-ROM" standard | |
98 | 1.06 GRG 1998.08.19 Added audio ioctl support | |
99 | 1.07 GRG 1998.09.24 Increased reset timeout, added jumbo support | |
100 | ||
101 | */ | |
102 | ||
103 | #define PCD_VERSION "1.07" | |
104 | #define PCD_MAJOR 46 | |
105 | #define PCD_NAME "pcd" | |
106 | #define PCD_UNITS 4 | |
107 | ||
108 | /* Here are things one can override from the insmod command. | |
109 | Most are autoprobed by paride unless set here. Verbose is off | |
110 | by default. | |
111 | ||
112 | */ | |
113 | ||
114 | static int verbose = 0; | |
115 | static int major = PCD_MAJOR; | |
116 | static char *name = PCD_NAME; | |
117 | static int nice = 0; | |
118 | static int disable = 0; | |
119 | ||
120 | static int drive0[6] = { 0, 0, 0, -1, -1, -1 }; | |
121 | static int drive1[6] = { 0, 0, 0, -1, -1, -1 }; | |
122 | static int drive2[6] = { 0, 0, 0, -1, -1, -1 }; | |
123 | static int drive3[6] = { 0, 0, 0, -1, -1, -1 }; | |
124 | ||
125 | static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3}; | |
126 | static int pcd_drive_count; | |
127 | ||
128 | enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY}; | |
129 | ||
130 | /* end of parameters */ | |
131 | ||
132 | #include <linux/module.h> | |
133 | #include <linux/init.h> | |
134 | #include <linux/errno.h> | |
135 | #include <linux/fs.h> | |
136 | #include <linux/kernel.h> | |
137 | #include <linux/delay.h> | |
138 | #include <linux/cdrom.h> | |
139 | #include <linux/spinlock.h> | |
140 | #include <linux/blkdev.h> | |
141 | #include <asm/uaccess.h> | |
142 | ||
143 | static spinlock_t pcd_lock; | |
144 | ||
145 | module_param(verbose, bool, 0644); | |
146 | module_param(major, int, 0); | |
147 | module_param(name, charp, 0); | |
148 | module_param(nice, int, 0); | |
149 | module_param_array(drive0, int, NULL, 0); | |
150 | module_param_array(drive1, int, NULL, 0); | |
151 | module_param_array(drive2, int, NULL, 0); | |
152 | module_param_array(drive3, int, NULL, 0); | |
153 | ||
154 | #include "paride.h" | |
155 | #include "pseudo.h" | |
156 | ||
157 | #define PCD_RETRIES 5 | |
158 | #define PCD_TMO 800 /* timeout in jiffies */ | |
159 | #define PCD_DELAY 50 /* spin delay in uS */ | |
160 | #define PCD_READY_TMO 20 /* in seconds */ | |
161 | #define PCD_RESET_TMO 100 /* in tenths of a second */ | |
162 | ||
163 | #define PCD_SPIN (1000000*PCD_TMO)/(HZ*PCD_DELAY) | |
164 | ||
165 | #define IDE_ERR 0x01 | |
166 | #define IDE_DRQ 0x08 | |
167 | #define IDE_READY 0x40 | |
168 | #define IDE_BUSY 0x80 | |
169 | ||
170 | static int pcd_open(struct cdrom_device_info *cdi, int purpose); | |
171 | static void pcd_release(struct cdrom_device_info *cdi); | |
172 | static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr); | |
173 | static int pcd_media_changed(struct cdrom_device_info *cdi, int slot_nr); | |
174 | static int pcd_tray_move(struct cdrom_device_info *cdi, int position); | |
175 | static int pcd_lock_door(struct cdrom_device_info *cdi, int lock); | |
176 | static int pcd_drive_reset(struct cdrom_device_info *cdi); | |
177 | static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn); | |
178 | static int pcd_audio_ioctl(struct cdrom_device_info *cdi, | |
179 | unsigned int cmd, void *arg); | |
180 | static int pcd_packet(struct cdrom_device_info *cdi, | |
181 | struct packet_command *cgc); | |
182 | ||
183 | static int pcd_detect(void); | |
184 | static void pcd_probe_capabilities(void); | |
185 | static void do_pcd_read_drq(void); | |
186 | static void do_pcd_request(request_queue_t * q); | |
187 | static void do_pcd_read(void); | |
188 | ||
189 | struct pcd_unit { | |
190 | struct pi_adapter pia; /* interface to paride layer */ | |
191 | struct pi_adapter *pi; | |
192 | int drive; /* master/slave */ | |
193 | int last_sense; /* result of last request sense */ | |
194 | int changed; /* media change seen */ | |
195 | int present; /* does this unit exist ? */ | |
196 | char *name; /* pcd0, pcd1, etc */ | |
197 | struct cdrom_device_info info; /* uniform cdrom interface */ | |
198 | struct gendisk *disk; | |
199 | }; | |
200 | ||
201 | static struct pcd_unit pcd[PCD_UNITS]; | |
202 | ||
203 | static char pcd_scratch[64]; | |
204 | static char pcd_buffer[2048]; /* raw block buffer */ | |
205 | static int pcd_bufblk = -1; /* block in buffer, in CD units, | |
206 | -1 for nothing there. See also | |
207 | pd_unit. | |
208 | */ | |
209 | ||
210 | /* the variables below are used mainly in the I/O request engine, which | |
211 | processes only one request at a time. | |
212 | */ | |
213 | ||
214 | static struct pcd_unit *pcd_current; /* current request's drive */ | |
215 | static struct request *pcd_req; | |
216 | static int pcd_retries; /* retries on current request */ | |
217 | static int pcd_busy; /* request being processed ? */ | |
218 | static int pcd_sector; /* address of next requested sector */ | |
219 | static int pcd_count; /* number of blocks still to do */ | |
220 | static char *pcd_buf; /* buffer for request in progress */ | |
221 | ||
222 | static int pcd_warned; /* Have we logged a phase warning ? */ | |
223 | ||
224 | /* kernel glue structures */ | |
225 | ||
226 | static int pcd_block_open(struct inode *inode, struct file *file) | |
227 | { | |
228 | struct pcd_unit *cd = inode->i_bdev->bd_disk->private_data; | |
229 | return cdrom_open(&cd->info, inode, file); | |
230 | } | |
231 | ||
232 | static int pcd_block_release(struct inode *inode, struct file *file) | |
233 | { | |
234 | struct pcd_unit *cd = inode->i_bdev->bd_disk->private_data; | |
235 | return cdrom_release(&cd->info, file); | |
236 | } | |
237 | ||
238 | static int pcd_block_ioctl(struct inode *inode, struct file *file, | |
239 | unsigned cmd, unsigned long arg) | |
240 | { | |
241 | struct pcd_unit *cd = inode->i_bdev->bd_disk->private_data; | |
242 | return cdrom_ioctl(file, &cd->info, inode, cmd, arg); | |
243 | } | |
244 | ||
245 | static int pcd_block_media_changed(struct gendisk *disk) | |
246 | { | |
247 | struct pcd_unit *cd = disk->private_data; | |
248 | return cdrom_media_changed(&cd->info); | |
249 | } | |
250 | ||
251 | static struct block_device_operations pcd_bdops = { | |
252 | .owner = THIS_MODULE, | |
253 | .open = pcd_block_open, | |
254 | .release = pcd_block_release, | |
255 | .ioctl = pcd_block_ioctl, | |
256 | .media_changed = pcd_block_media_changed, | |
257 | }; | |
258 | ||
259 | static struct cdrom_device_ops pcd_dops = { | |
260 | .open = pcd_open, | |
261 | .release = pcd_release, | |
262 | .drive_status = pcd_drive_status, | |
263 | .media_changed = pcd_media_changed, | |
264 | .tray_move = pcd_tray_move, | |
265 | .lock_door = pcd_lock_door, | |
266 | .get_mcn = pcd_get_mcn, | |
267 | .reset = pcd_drive_reset, | |
268 | .audio_ioctl = pcd_audio_ioctl, | |
269 | .generic_packet = pcd_packet, | |
270 | .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | | |
271 | CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET | | |
272 | CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R | | |
273 | CDC_CD_RW, | |
274 | }; | |
275 | ||
276 | static void pcd_init_units(void) | |
277 | { | |
278 | struct pcd_unit *cd; | |
279 | int unit; | |
280 | ||
281 | pcd_drive_count = 0; | |
282 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
283 | struct gendisk *disk = alloc_disk(1); | |
284 | if (!disk) | |
285 | continue; | |
286 | cd->disk = disk; | |
287 | cd->pi = &cd->pia; | |
288 | cd->present = 0; | |
289 | cd->last_sense = 0; | |
290 | cd->changed = 1; | |
291 | cd->drive = (*drives[unit])[D_SLV]; | |
292 | if ((*drives[unit])[D_PRT]) | |
293 | pcd_drive_count++; | |
294 | ||
295 | cd->name = &cd->info.name[0]; | |
296 | snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit); | |
297 | cd->info.ops = &pcd_dops; | |
298 | cd->info.handle = cd; | |
299 | cd->info.speed = 0; | |
300 | cd->info.capacity = 1; | |
301 | cd->info.mask = 0; | |
302 | disk->major = major; | |
303 | disk->first_minor = unit; | |
304 | strcpy(disk->disk_name, cd->name); /* umm... */ | |
305 | disk->fops = &pcd_bdops; | |
306 | } | |
307 | } | |
308 | ||
309 | static int pcd_open(struct cdrom_device_info *cdi, int purpose) | |
310 | { | |
311 | struct pcd_unit *cd = cdi->handle; | |
312 | if (!cd->present) | |
313 | return -ENODEV; | |
314 | return 0; | |
315 | } | |
316 | ||
317 | static void pcd_release(struct cdrom_device_info *cdi) | |
318 | { | |
319 | } | |
320 | ||
321 | static inline int status_reg(struct pcd_unit *cd) | |
322 | { | |
323 | return pi_read_regr(cd->pi, 1, 6); | |
324 | } | |
325 | ||
326 | static inline int read_reg(struct pcd_unit *cd, int reg) | |
327 | { | |
328 | return pi_read_regr(cd->pi, 0, reg); | |
329 | } | |
330 | ||
331 | static inline void write_reg(struct pcd_unit *cd, int reg, int val) | |
332 | { | |
333 | pi_write_regr(cd->pi, 0, reg, val); | |
334 | } | |
335 | ||
336 | static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg) | |
337 | { | |
338 | int j, r, e, s, p; | |
339 | ||
340 | j = 0; | |
341 | while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop)))) | |
342 | && (j++ < PCD_SPIN)) | |
343 | udelay(PCD_DELAY); | |
344 | ||
345 | if ((r & (IDE_ERR & stop)) || (j >= PCD_SPIN)) { | |
346 | s = read_reg(cd, 7); | |
347 | e = read_reg(cd, 1); | |
348 | p = read_reg(cd, 2); | |
349 | if (j >= PCD_SPIN) | |
350 | e |= 0x100; | |
351 | if (fun) | |
352 | printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x" | |
353 | " loop=%d phase=%d\n", | |
354 | cd->name, fun, msg, r, s, e, j, p); | |
355 | return (s << 8) + r; | |
356 | } | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun) | |
361 | { | |
362 | pi_connect(cd->pi); | |
363 | ||
364 | write_reg(cd, 6, 0xa0 + 0x10 * cd->drive); | |
365 | ||
366 | if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) { | |
367 | pi_disconnect(cd->pi); | |
368 | return -1; | |
369 | } | |
370 | ||
371 | write_reg(cd, 4, dlen % 256); | |
372 | write_reg(cd, 5, dlen / 256); | |
373 | write_reg(cd, 7, 0xa0); /* ATAPI packet command */ | |
374 | ||
375 | if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) { | |
376 | pi_disconnect(cd->pi); | |
377 | return -1; | |
378 | } | |
379 | ||
380 | if (read_reg(cd, 2) != 1) { | |
381 | printk("%s: %s: command phase error\n", cd->name, fun); | |
382 | pi_disconnect(cd->pi); | |
383 | return -1; | |
384 | } | |
385 | ||
386 | pi_write_block(cd->pi, cmd, 12); | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
391 | static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun) | |
392 | { | |
393 | int r, d, p, n, k, j; | |
394 | ||
395 | r = -1; | |
396 | k = 0; | |
397 | j = 0; | |
398 | ||
399 | if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, | |
400 | fun, "completion")) { | |
401 | r = 0; | |
402 | while (read_reg(cd, 7) & IDE_DRQ) { | |
403 | d = read_reg(cd, 4) + 256 * read_reg(cd, 5); | |
404 | n = (d + 3) & 0xfffc; | |
405 | p = read_reg(cd, 2) & 3; | |
406 | ||
407 | if ((p == 2) && (n > 0) && (j == 0)) { | |
408 | pi_read_block(cd->pi, buf, n); | |
409 | if (verbose > 1) | |
410 | printk("%s: %s: Read %d bytes\n", | |
411 | cd->name, fun, n); | |
412 | r = 0; | |
413 | j++; | |
414 | } else { | |
415 | if (verbose > 1) | |
416 | printk | |
417 | ("%s: %s: Unexpected phase %d, d=%d, k=%d\n", | |
418 | cd->name, fun, p, d, k); | |
419 | if ((verbose < 2) && !pcd_warned) { | |
420 | pcd_warned = 1; | |
421 | printk | |
422 | ("%s: WARNING: ATAPI phase errors\n", | |
423 | cd->name); | |
424 | } | |
425 | mdelay(1); | |
426 | } | |
427 | if (k++ > PCD_TMO) { | |
428 | printk("%s: Stuck DRQ\n", cd->name); | |
429 | break; | |
430 | } | |
431 | if (pcd_wait | |
432 | (cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun, | |
433 | "completion")) { | |
434 | r = -1; | |
435 | break; | |
436 | } | |
437 | } | |
438 | } | |
439 | ||
440 | pi_disconnect(cd->pi); | |
441 | ||
442 | return r; | |
443 | } | |
444 | ||
445 | static void pcd_req_sense(struct pcd_unit *cd, char *fun) | |
446 | { | |
447 | char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 }; | |
448 | char buf[16]; | |
449 | int r, c; | |
450 | ||
451 | r = pcd_command(cd, rs_cmd, 16, "Request sense"); | |
452 | mdelay(1); | |
453 | if (!r) | |
454 | pcd_completion(cd, buf, "Request sense"); | |
455 | ||
456 | cd->last_sense = -1; | |
457 | c = 2; | |
458 | if (!r) { | |
459 | if (fun) | |
460 | printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n", | |
461 | cd->name, fun, buf[2] & 0xf, buf[12], buf[13]); | |
462 | c = buf[2] & 0xf; | |
463 | cd->last_sense = | |
464 | c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16); | |
465 | } | |
466 | if ((c == 2) || (c == 6)) | |
467 | cd->changed = 1; | |
468 | } | |
469 | ||
470 | static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun) | |
471 | { | |
472 | int r; | |
473 | ||
474 | r = pcd_command(cd, cmd, dlen, fun); | |
475 | mdelay(1); | |
476 | if (!r) | |
477 | r = pcd_completion(cd, buf, fun); | |
478 | if (r) | |
479 | pcd_req_sense(cd, fun); | |
480 | ||
481 | return r; | |
482 | } | |
483 | ||
484 | static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc) | |
485 | { | |
486 | return pcd_atapi(cdi->handle, cgc->cmd, cgc->buflen, cgc->buffer, | |
487 | "generic packet"); | |
488 | } | |
489 | ||
490 | #define DBMSG(msg) ((verbose>1)?(msg):NULL) | |
491 | ||
492 | static int pcd_media_changed(struct cdrom_device_info *cdi, int slot_nr) | |
493 | { | |
494 | struct pcd_unit *cd = cdi->handle; | |
495 | int res = cd->changed; | |
496 | if (res) | |
497 | cd->changed = 0; | |
498 | return res; | |
499 | } | |
500 | ||
501 | static int pcd_lock_door(struct cdrom_device_info *cdi, int lock) | |
502 | { | |
503 | char un_cmd[12] = { 0x1e, 0, 0, 0, lock, 0, 0, 0, 0, 0, 0, 0 }; | |
504 | ||
505 | return pcd_atapi(cdi->handle, un_cmd, 0, pcd_scratch, | |
506 | lock ? "lock door" : "unlock door"); | |
507 | } | |
508 | ||
509 | static int pcd_tray_move(struct cdrom_device_info *cdi, int position) | |
510 | { | |
511 | char ej_cmd[12] = { 0x1b, 0, 0, 0, 3 - position, 0, 0, 0, 0, 0, 0, 0 }; | |
512 | ||
513 | return pcd_atapi(cdi->handle, ej_cmd, 0, pcd_scratch, | |
514 | position ? "eject" : "close tray"); | |
515 | } | |
516 | ||
517 | static void pcd_sleep(int cs) | |
518 | { | |
86e84862 | 519 | schedule_timeout_interruptible(cs); |
1da177e4 LT |
520 | } |
521 | ||
522 | static int pcd_reset(struct pcd_unit *cd) | |
523 | { | |
524 | int i, k, flg; | |
525 | int expect[5] = { 1, 1, 1, 0x14, 0xeb }; | |
526 | ||
527 | pi_connect(cd->pi); | |
528 | write_reg(cd, 6, 0xa0 + 0x10 * cd->drive); | |
529 | write_reg(cd, 7, 8); | |
530 | ||
531 | pcd_sleep(20 * HZ / 1000); /* delay a bit */ | |
532 | ||
533 | k = 0; | |
534 | while ((k++ < PCD_RESET_TMO) && (status_reg(cd) & IDE_BUSY)) | |
535 | pcd_sleep(HZ / 10); | |
536 | ||
537 | flg = 1; | |
538 | for (i = 0; i < 5; i++) | |
539 | flg &= (read_reg(cd, i + 1) == expect[i]); | |
540 | ||
541 | if (verbose) { | |
542 | printk("%s: Reset (%d) signature = ", cd->name, k); | |
543 | for (i = 0; i < 5; i++) | |
544 | printk("%3x", read_reg(cd, i + 1)); | |
545 | if (!flg) | |
546 | printk(" (incorrect)"); | |
547 | printk("\n"); | |
548 | } | |
549 | ||
550 | pi_disconnect(cd->pi); | |
551 | return flg - 1; | |
552 | } | |
553 | ||
554 | static int pcd_drive_reset(struct cdrom_device_info *cdi) | |
555 | { | |
556 | return pcd_reset(cdi->handle); | |
557 | } | |
558 | ||
559 | static int pcd_ready_wait(struct pcd_unit *cd, int tmo) | |
560 | { | |
561 | char tr_cmd[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; | |
562 | int k, p; | |
563 | ||
564 | k = 0; | |
565 | while (k < tmo) { | |
566 | cd->last_sense = 0; | |
567 | pcd_atapi(cd, tr_cmd, 0, NULL, DBMSG("test unit ready")); | |
568 | p = cd->last_sense; | |
569 | if (!p) | |
570 | return 0; | |
571 | if (!(((p & 0xffff) == 0x0402) || ((p & 0xff) == 6))) | |
572 | return p; | |
573 | k++; | |
574 | pcd_sleep(HZ); | |
575 | } | |
576 | return 0x000020; /* timeout */ | |
577 | } | |
578 | ||
579 | static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr) | |
580 | { | |
581 | char rc_cmd[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; | |
582 | struct pcd_unit *cd = cdi->handle; | |
583 | ||
584 | if (pcd_ready_wait(cd, PCD_READY_TMO)) | |
585 | return CDS_DRIVE_NOT_READY; | |
586 | if (pcd_atapi(cd, rc_cmd, 8, pcd_scratch, DBMSG("check media"))) | |
587 | return CDS_NO_DISC; | |
588 | return CDS_DISC_OK; | |
589 | } | |
590 | ||
591 | static int pcd_identify(struct pcd_unit *cd, char *id) | |
592 | { | |
593 | int k, s; | |
594 | char id_cmd[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 }; | |
595 | ||
596 | pcd_bufblk = -1; | |
597 | ||
598 | s = pcd_atapi(cd, id_cmd, 36, pcd_buffer, "identify"); | |
599 | ||
600 | if (s) | |
601 | return -1; | |
602 | if ((pcd_buffer[0] & 0x1f) != 5) { | |
603 | if (verbose) | |
604 | printk("%s: %s is not a CD-ROM\n", | |
605 | cd->name, cd->drive ? "Slave" : "Master"); | |
606 | return -1; | |
607 | } | |
608 | memcpy(id, pcd_buffer + 16, 16); | |
609 | id[16] = 0; | |
610 | k = 16; | |
611 | while ((k >= 0) && (id[k] <= 0x20)) { | |
612 | id[k] = 0; | |
613 | k--; | |
614 | } | |
615 | ||
616 | printk("%s: %s: %s\n", cd->name, cd->drive ? "Slave" : "Master", id); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | /* | |
622 | * returns 0, with id set if drive is detected | |
623 | * -1, if drive detection failed | |
624 | */ | |
625 | static int pcd_probe(struct pcd_unit *cd, int ms, char *id) | |
626 | { | |
627 | if (ms == -1) { | |
628 | for (cd->drive = 0; cd->drive <= 1; cd->drive++) | |
629 | if (!pcd_reset(cd) && !pcd_identify(cd, id)) | |
630 | return 0; | |
631 | } else { | |
632 | cd->drive = ms; | |
633 | if (!pcd_reset(cd) && !pcd_identify(cd, id)) | |
634 | return 0; | |
635 | } | |
636 | return -1; | |
637 | } | |
638 | ||
639 | static void pcd_probe_capabilities(void) | |
640 | { | |
641 | int unit, r; | |
642 | char buffer[32]; | |
643 | char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 }; | |
644 | struct pcd_unit *cd; | |
645 | ||
646 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
647 | if (!cd->present) | |
648 | continue; | |
649 | r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities"); | |
650 | if (r) | |
651 | continue; | |
652 | /* we should now have the cap page */ | |
653 | if ((buffer[11] & 1) == 0) | |
654 | cd->info.mask |= CDC_CD_R; | |
655 | if ((buffer[11] & 2) == 0) | |
656 | cd->info.mask |= CDC_CD_RW; | |
657 | if ((buffer[12] & 1) == 0) | |
658 | cd->info.mask |= CDC_PLAY_AUDIO; | |
659 | if ((buffer[14] & 1) == 0) | |
660 | cd->info.mask |= CDC_LOCK; | |
661 | if ((buffer[14] & 8) == 0) | |
662 | cd->info.mask |= CDC_OPEN_TRAY; | |
663 | if ((buffer[14] >> 6) == 0) | |
664 | cd->info.mask |= CDC_CLOSE_TRAY; | |
665 | } | |
666 | } | |
667 | ||
668 | static int pcd_detect(void) | |
669 | { | |
670 | char id[18]; | |
671 | int k, unit; | |
672 | struct pcd_unit *cd; | |
673 | ||
674 | printk("%s: %s version %s, major %d, nice %d\n", | |
675 | name, name, PCD_VERSION, major, nice); | |
676 | ||
677 | k = 0; | |
678 | if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */ | |
679 | cd = pcd; | |
680 | if (pi_init(cd->pi, 1, -1, -1, -1, -1, -1, pcd_buffer, | |
681 | PI_PCD, verbose, cd->name)) { | |
682 | if (!pcd_probe(cd, -1, id) && cd->disk) { | |
683 | cd->present = 1; | |
684 | k++; | |
685 | } else | |
686 | pi_release(cd->pi); | |
687 | } | |
688 | } else { | |
689 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
690 | int *conf = *drives[unit]; | |
691 | if (!conf[D_PRT]) | |
692 | continue; | |
693 | if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD], | |
694 | conf[D_UNI], conf[D_PRO], conf[D_DLY], | |
695 | pcd_buffer, PI_PCD, verbose, cd->name)) | |
696 | continue; | |
697 | if (!pcd_probe(cd, conf[D_SLV], id) && cd->disk) { | |
698 | cd->present = 1; | |
699 | k++; | |
700 | } else | |
701 | pi_release(cd->pi); | |
702 | } | |
703 | } | |
704 | if (k) | |
705 | return 0; | |
706 | ||
707 | printk("%s: No CD-ROM drive found\n", name); | |
708 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) | |
709 | put_disk(cd->disk); | |
710 | return -1; | |
711 | } | |
712 | ||
713 | /* I/O request processing */ | |
714 | static struct request_queue *pcd_queue; | |
715 | ||
716 | static void do_pcd_request(request_queue_t * q) | |
717 | { | |
718 | if (pcd_busy) | |
719 | return; | |
720 | while (1) { | |
721 | pcd_req = elv_next_request(q); | |
722 | if (!pcd_req) | |
723 | return; | |
724 | ||
725 | if (rq_data_dir(pcd_req) == READ) { | |
726 | struct pcd_unit *cd = pcd_req->rq_disk->private_data; | |
727 | if (cd != pcd_current) | |
728 | pcd_bufblk = -1; | |
729 | pcd_current = cd; | |
730 | pcd_sector = pcd_req->sector; | |
731 | pcd_count = pcd_req->current_nr_sectors; | |
732 | pcd_buf = pcd_req->buffer; | |
733 | pcd_busy = 1; | |
734 | ps_set_intr(do_pcd_read, NULL, 0, nice); | |
735 | return; | |
736 | } else | |
737 | end_request(pcd_req, 0); | |
738 | } | |
739 | } | |
740 | ||
741 | static inline void next_request(int success) | |
742 | { | |
743 | unsigned long saved_flags; | |
744 | ||
745 | spin_lock_irqsave(&pcd_lock, saved_flags); | |
746 | end_request(pcd_req, success); | |
747 | pcd_busy = 0; | |
748 | do_pcd_request(pcd_queue); | |
749 | spin_unlock_irqrestore(&pcd_lock, saved_flags); | |
750 | } | |
751 | ||
752 | static int pcd_ready(void) | |
753 | { | |
754 | return (((status_reg(pcd_current) & (IDE_BUSY | IDE_DRQ)) == IDE_DRQ)); | |
755 | } | |
756 | ||
757 | static void pcd_transfer(void) | |
758 | { | |
759 | ||
760 | while (pcd_count && (pcd_sector / 4 == pcd_bufblk)) { | |
761 | int o = (pcd_sector % 4) * 512; | |
762 | memcpy(pcd_buf, pcd_buffer + o, 512); | |
763 | pcd_count--; | |
764 | pcd_buf += 512; | |
765 | pcd_sector++; | |
766 | } | |
767 | } | |
768 | ||
769 | static void pcd_start(void) | |
770 | { | |
771 | int b, i; | |
772 | char rd_cmd[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }; | |
773 | ||
774 | pcd_bufblk = pcd_sector / 4; | |
775 | b = pcd_bufblk; | |
776 | for (i = 0; i < 4; i++) { | |
777 | rd_cmd[5 - i] = b & 0xff; | |
778 | b = b >> 8; | |
779 | } | |
780 | ||
781 | if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) { | |
782 | pcd_bufblk = -1; | |
783 | next_request(0); | |
784 | return; | |
785 | } | |
786 | ||
787 | mdelay(1); | |
788 | ||
789 | ps_set_intr(do_pcd_read_drq, pcd_ready, PCD_TMO, nice); | |
790 | } | |
791 | ||
792 | static void do_pcd_read(void) | |
793 | { | |
794 | pcd_busy = 1; | |
795 | pcd_retries = 0; | |
796 | pcd_transfer(); | |
797 | if (!pcd_count) { | |
798 | next_request(1); | |
799 | return; | |
800 | } | |
801 | ||
802 | pi_do_claimed(pcd_current->pi, pcd_start); | |
803 | } | |
804 | ||
805 | static void do_pcd_read_drq(void) | |
806 | { | |
807 | unsigned long saved_flags; | |
808 | ||
809 | if (pcd_completion(pcd_current, pcd_buffer, "read block")) { | |
810 | if (pcd_retries < PCD_RETRIES) { | |
811 | mdelay(1); | |
812 | pcd_retries++; | |
813 | pi_do_claimed(pcd_current->pi, pcd_start); | |
814 | return; | |
815 | } | |
816 | pcd_bufblk = -1; | |
817 | next_request(0); | |
818 | return; | |
819 | } | |
820 | ||
821 | do_pcd_read(); | |
822 | spin_lock_irqsave(&pcd_lock, saved_flags); | |
823 | do_pcd_request(pcd_queue); | |
824 | spin_unlock_irqrestore(&pcd_lock, saved_flags); | |
825 | } | |
826 | ||
827 | /* the audio_ioctl stuff is adapted from sr_ioctl.c */ | |
828 | ||
829 | static int pcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) | |
830 | { | |
831 | struct pcd_unit *cd = cdi->handle; | |
832 | ||
833 | switch (cmd) { | |
834 | ||
835 | case CDROMREADTOCHDR: | |
836 | ||
837 | { | |
838 | char cmd[12] = | |
839 | { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12, | |
840 | 0, 0, 0 }; | |
841 | struct cdrom_tochdr *tochdr = | |
842 | (struct cdrom_tochdr *) arg; | |
843 | char buffer[32]; | |
844 | int r; | |
845 | ||
846 | r = pcd_atapi(cd, cmd, 12, buffer, "read toc header"); | |
847 | ||
848 | tochdr->cdth_trk0 = buffer[2]; | |
849 | tochdr->cdth_trk1 = buffer[3]; | |
850 | ||
851 | return r ? -EIO : 0; | |
852 | } | |
853 | ||
854 | case CDROMREADTOCENTRY: | |
855 | ||
856 | { | |
857 | char cmd[12] = | |
858 | { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12, | |
859 | 0, 0, 0 }; | |
860 | ||
861 | struct cdrom_tocentry *tocentry = | |
862 | (struct cdrom_tocentry *) arg; | |
863 | unsigned char buffer[32]; | |
864 | int r; | |
865 | ||
866 | cmd[1] = | |
867 | (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0); | |
868 | cmd[6] = tocentry->cdte_track; | |
869 | ||
870 | r = pcd_atapi(cd, cmd, 12, buffer, "read toc entry"); | |
871 | ||
872 | tocentry->cdte_ctrl = buffer[5] & 0xf; | |
873 | tocentry->cdte_adr = buffer[5] >> 4; | |
874 | tocentry->cdte_datamode = | |
875 | (tocentry->cdte_ctrl & 0x04) ? 1 : 0; | |
876 | if (tocentry->cdte_format == CDROM_MSF) { | |
877 | tocentry->cdte_addr.msf.minute = buffer[9]; | |
878 | tocentry->cdte_addr.msf.second = buffer[10]; | |
879 | tocentry->cdte_addr.msf.frame = buffer[11]; | |
880 | } else | |
881 | tocentry->cdte_addr.lba = | |
882 | (((((buffer[8] << 8) + buffer[9]) << 8) | |
883 | + buffer[10]) << 8) + buffer[11]; | |
884 | ||
885 | return r ? -EIO : 0; | |
886 | } | |
887 | ||
888 | default: | |
889 | ||
890 | return -ENOSYS; | |
891 | } | |
892 | } | |
893 | ||
894 | static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) | |
895 | { | |
896 | char cmd[12] = | |
897 | { GPCMD_READ_SUBCHANNEL, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 }; | |
898 | char buffer[32]; | |
899 | ||
900 | if (pcd_atapi(cdi->handle, cmd, 24, buffer, "get mcn")) | |
901 | return -EIO; | |
902 | ||
903 | memcpy(mcn->medium_catalog_number, buffer + 9, 13); | |
904 | mcn->medium_catalog_number[13] = 0; | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | static int __init pcd_init(void) | |
910 | { | |
911 | struct pcd_unit *cd; | |
912 | int unit; | |
913 | ||
914 | if (disable) | |
915 | return -1; | |
916 | ||
917 | pcd_init_units(); | |
918 | ||
919 | if (pcd_detect()) | |
920 | return -1; | |
921 | ||
922 | /* get the atapi capabilities page */ | |
923 | pcd_probe_capabilities(); | |
924 | ||
925 | if (register_blkdev(major, name)) { | |
926 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) | |
927 | put_disk(cd->disk); | |
928 | return -1; | |
929 | } | |
930 | ||
931 | pcd_queue = blk_init_queue(do_pcd_request, &pcd_lock); | |
932 | if (!pcd_queue) { | |
933 | unregister_blkdev(major, name); | |
934 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) | |
935 | put_disk(cd->disk); | |
936 | return -1; | |
937 | } | |
938 | ||
939 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
940 | if (cd->present) { | |
941 | register_cdrom(&cd->info); | |
942 | cd->disk->private_data = cd; | |
943 | cd->disk->queue = pcd_queue; | |
944 | add_disk(cd->disk); | |
945 | } | |
946 | } | |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
951 | static void __exit pcd_exit(void) | |
952 | { | |
953 | struct pcd_unit *cd; | |
954 | int unit; | |
955 | ||
956 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
957 | if (cd->present) { | |
958 | del_gendisk(cd->disk); | |
959 | pi_release(cd->pi); | |
960 | unregister_cdrom(&cd->info); | |
961 | } | |
962 | put_disk(cd->disk); | |
963 | } | |
964 | blk_cleanup_queue(pcd_queue); | |
965 | unregister_blkdev(major, name); | |
966 | } | |
967 | ||
968 | MODULE_LICENSE("GPL"); | |
969 | module_init(pcd_init) | |
970 | module_exit(pcd_exit) |