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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 | ||
336ec137 GU |
72 | If this driver is built into the kernel, you can use the |
73 | following kernel command line parameters, with the same values | |
1da177e4 LT |
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> | |
2a48fc0a | 141 | #include <linux/mutex.h> |
7c0f6ba6 | 142 | #include <linux/uaccess.h> |
1da177e4 | 143 | |
2a48fc0a | 144 | static DEFINE_MUTEX(pcd_mutex); |
671d40f4 | 145 | static DEFINE_SPINLOCK(pcd_lock); |
1da177e4 | 146 | |
1b9fbafb | 147 | module_param(verbose, int, 0644); |
1da177e4 LT |
148 | module_param(major, int, 0); |
149 | module_param(name, charp, 0); | |
150 | module_param(nice, int, 0); | |
151 | module_param_array(drive0, int, NULL, 0); | |
152 | module_param_array(drive1, int, NULL, 0); | |
153 | module_param_array(drive2, int, NULL, 0); | |
154 | module_param_array(drive3, int, NULL, 0); | |
155 | ||
156 | #include "paride.h" | |
157 | #include "pseudo.h" | |
158 | ||
159 | #define PCD_RETRIES 5 | |
160 | #define PCD_TMO 800 /* timeout in jiffies */ | |
161 | #define PCD_DELAY 50 /* spin delay in uS */ | |
162 | #define PCD_READY_TMO 20 /* in seconds */ | |
163 | #define PCD_RESET_TMO 100 /* in tenths of a second */ | |
164 | ||
165 | #define PCD_SPIN (1000000*PCD_TMO)/(HZ*PCD_DELAY) | |
166 | ||
167 | #define IDE_ERR 0x01 | |
168 | #define IDE_DRQ 0x08 | |
169 | #define IDE_READY 0x40 | |
170 | #define IDE_BUSY 0x80 | |
171 | ||
172 | static int pcd_open(struct cdrom_device_info *cdi, int purpose); | |
173 | static void pcd_release(struct cdrom_device_info *cdi); | |
174 | static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr); | |
b1b56b93 TH |
175 | static unsigned int pcd_check_events(struct cdrom_device_info *cdi, |
176 | unsigned int clearing, int slot_nr); | |
1da177e4 LT |
177 | static int pcd_tray_move(struct cdrom_device_info *cdi, int position); |
178 | static int pcd_lock_door(struct cdrom_device_info *cdi, int lock); | |
179 | static int pcd_drive_reset(struct cdrom_device_info *cdi); | |
180 | static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn); | |
181 | static int pcd_audio_ioctl(struct cdrom_device_info *cdi, | |
182 | unsigned int cmd, void *arg); | |
183 | static int pcd_packet(struct cdrom_device_info *cdi, | |
184 | struct packet_command *cgc); | |
185 | ||
186 | static int pcd_detect(void); | |
187 | static void pcd_probe_capabilities(void); | |
188 | static void do_pcd_read_drq(void); | |
165125e1 | 189 | static void do_pcd_request(struct request_queue * q); |
1da177e4 LT |
190 | static void do_pcd_read(void); |
191 | ||
192 | struct pcd_unit { | |
193 | struct pi_adapter pia; /* interface to paride layer */ | |
194 | struct pi_adapter *pi; | |
195 | int drive; /* master/slave */ | |
196 | int last_sense; /* result of last request sense */ | |
197 | int changed; /* media change seen */ | |
198 | int present; /* does this unit exist ? */ | |
199 | char *name; /* pcd0, pcd1, etc */ | |
200 | struct cdrom_device_info info; /* uniform cdrom interface */ | |
201 | struct gendisk *disk; | |
202 | }; | |
203 | ||
204 | static struct pcd_unit pcd[PCD_UNITS]; | |
205 | ||
206 | static char pcd_scratch[64]; | |
207 | static char pcd_buffer[2048]; /* raw block buffer */ | |
208 | static int pcd_bufblk = -1; /* block in buffer, in CD units, | |
209 | -1 for nothing there. See also | |
210 | pd_unit. | |
211 | */ | |
212 | ||
213 | /* the variables below are used mainly in the I/O request engine, which | |
214 | processes only one request at a time. | |
215 | */ | |
216 | ||
217 | static struct pcd_unit *pcd_current; /* current request's drive */ | |
218 | static struct request *pcd_req; | |
219 | static int pcd_retries; /* retries on current request */ | |
220 | static int pcd_busy; /* request being processed ? */ | |
221 | static int pcd_sector; /* address of next requested sector */ | |
222 | static int pcd_count; /* number of blocks still to do */ | |
223 | static char *pcd_buf; /* buffer for request in progress */ | |
9f4ba6b0 | 224 | static void *par_drv; /* reference of parport driver */ |
1da177e4 | 225 | |
1da177e4 LT |
226 | /* kernel glue structures */ |
227 | ||
c9acf903 | 228 | static int pcd_block_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 229 | { |
c9acf903 | 230 | struct pcd_unit *cd = bdev->bd_disk->private_data; |
6e9624b8 AB |
231 | int ret; |
232 | ||
2a48fc0a | 233 | mutex_lock(&pcd_mutex); |
6e9624b8 | 234 | ret = cdrom_open(&cd->info, bdev, mode); |
2a48fc0a | 235 | mutex_unlock(&pcd_mutex); |
6e9624b8 AB |
236 | |
237 | return ret; | |
1da177e4 LT |
238 | } |
239 | ||
db2a144b | 240 | static void pcd_block_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 241 | { |
c9acf903 | 242 | struct pcd_unit *cd = disk->private_data; |
2a48fc0a | 243 | mutex_lock(&pcd_mutex); |
c9acf903 | 244 | cdrom_release(&cd->info, mode); |
2a48fc0a | 245 | mutex_unlock(&pcd_mutex); |
1da177e4 LT |
246 | } |
247 | ||
c9acf903 | 248 | static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
249 | unsigned cmd, unsigned long arg) |
250 | { | |
c9acf903 | 251 | struct pcd_unit *cd = bdev->bd_disk->private_data; |
8a6cfeb6 AB |
252 | int ret; |
253 | ||
2a48fc0a | 254 | mutex_lock(&pcd_mutex); |
8a6cfeb6 | 255 | ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg); |
2a48fc0a | 256 | mutex_unlock(&pcd_mutex); |
8a6cfeb6 AB |
257 | |
258 | return ret; | |
1da177e4 LT |
259 | } |
260 | ||
b1b56b93 TH |
261 | static unsigned int pcd_block_check_events(struct gendisk *disk, |
262 | unsigned int clearing) | |
1da177e4 LT |
263 | { |
264 | struct pcd_unit *cd = disk->private_data; | |
b1b56b93 | 265 | return cdrom_check_events(&cd->info, clearing); |
1da177e4 LT |
266 | } |
267 | ||
83d5cde4 | 268 | static const struct block_device_operations pcd_bdops = { |
1da177e4 | 269 | .owner = THIS_MODULE, |
c9acf903 AV |
270 | .open = pcd_block_open, |
271 | .release = pcd_block_release, | |
8a6cfeb6 | 272 | .ioctl = pcd_block_ioctl, |
b1b56b93 | 273 | .check_events = pcd_block_check_events, |
1da177e4 LT |
274 | }; |
275 | ||
853fe1bf | 276 | static const struct cdrom_device_ops pcd_dops = { |
1da177e4 LT |
277 | .open = pcd_open, |
278 | .release = pcd_release, | |
279 | .drive_status = pcd_drive_status, | |
b1b56b93 | 280 | .check_events = pcd_check_events, |
1da177e4 LT |
281 | .tray_move = pcd_tray_move, |
282 | .lock_door = pcd_lock_door, | |
283 | .get_mcn = pcd_get_mcn, | |
284 | .reset = pcd_drive_reset, | |
285 | .audio_ioctl = pcd_audio_ioctl, | |
286 | .generic_packet = pcd_packet, | |
287 | .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | | |
288 | CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET | | |
289 | CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R | | |
290 | CDC_CD_RW, | |
291 | }; | |
292 | ||
293 | static void pcd_init_units(void) | |
294 | { | |
295 | struct pcd_unit *cd; | |
296 | int unit; | |
297 | ||
298 | pcd_drive_count = 0; | |
299 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
300 | struct gendisk *disk = alloc_disk(1); | |
301 | if (!disk) | |
302 | continue; | |
303 | cd->disk = disk; | |
304 | cd->pi = &cd->pia; | |
305 | cd->present = 0; | |
306 | cd->last_sense = 0; | |
307 | cd->changed = 1; | |
308 | cd->drive = (*drives[unit])[D_SLV]; | |
309 | if ((*drives[unit])[D_PRT]) | |
310 | pcd_drive_count++; | |
311 | ||
312 | cd->name = &cd->info.name[0]; | |
313 | snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit); | |
314 | cd->info.ops = &pcd_dops; | |
315 | cd->info.handle = cd; | |
316 | cd->info.speed = 0; | |
317 | cd->info.capacity = 1; | |
318 | cd->info.mask = 0; | |
319 | disk->major = major; | |
320 | disk->first_minor = unit; | |
321 | strcpy(disk->disk_name, cd->name); /* umm... */ | |
322 | disk->fops = &pcd_bdops; | |
d4dc210f | 323 | disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE; |
1da177e4 LT |
324 | } |
325 | } | |
326 | ||
327 | static int pcd_open(struct cdrom_device_info *cdi, int purpose) | |
328 | { | |
329 | struct pcd_unit *cd = cdi->handle; | |
330 | if (!cd->present) | |
331 | return -ENODEV; | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static void pcd_release(struct cdrom_device_info *cdi) | |
336 | { | |
337 | } | |
338 | ||
339 | static inline int status_reg(struct pcd_unit *cd) | |
340 | { | |
341 | return pi_read_regr(cd->pi, 1, 6); | |
342 | } | |
343 | ||
344 | static inline int read_reg(struct pcd_unit *cd, int reg) | |
345 | { | |
346 | return pi_read_regr(cd->pi, 0, reg); | |
347 | } | |
348 | ||
349 | static inline void write_reg(struct pcd_unit *cd, int reg, int val) | |
350 | { | |
351 | pi_write_regr(cd->pi, 0, reg, val); | |
352 | } | |
353 | ||
354 | static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg) | |
355 | { | |
356 | int j, r, e, s, p; | |
357 | ||
358 | j = 0; | |
359 | while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop)))) | |
360 | && (j++ < PCD_SPIN)) | |
361 | udelay(PCD_DELAY); | |
362 | ||
c12ec0a2 | 363 | if ((r & (IDE_ERR & stop)) || (j > PCD_SPIN)) { |
1da177e4 LT |
364 | s = read_reg(cd, 7); |
365 | e = read_reg(cd, 1); | |
366 | p = read_reg(cd, 2); | |
c12ec0a2 | 367 | if (j > PCD_SPIN) |
1da177e4 LT |
368 | e |= 0x100; |
369 | if (fun) | |
370 | printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x" | |
371 | " loop=%d phase=%d\n", | |
372 | cd->name, fun, msg, r, s, e, j, p); | |
373 | return (s << 8) + r; | |
374 | } | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun) | |
379 | { | |
380 | pi_connect(cd->pi); | |
381 | ||
382 | write_reg(cd, 6, 0xa0 + 0x10 * cd->drive); | |
383 | ||
384 | if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) { | |
385 | pi_disconnect(cd->pi); | |
386 | return -1; | |
387 | } | |
388 | ||
389 | write_reg(cd, 4, dlen % 256); | |
390 | write_reg(cd, 5, dlen / 256); | |
391 | write_reg(cd, 7, 0xa0); /* ATAPI packet command */ | |
392 | ||
393 | if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) { | |
394 | pi_disconnect(cd->pi); | |
395 | return -1; | |
396 | } | |
397 | ||
398 | if (read_reg(cd, 2) != 1) { | |
399 | printk("%s: %s: command phase error\n", cd->name, fun); | |
400 | pi_disconnect(cd->pi); | |
401 | return -1; | |
402 | } | |
403 | ||
404 | pi_write_block(cd->pi, cmd, 12); | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun) | |
410 | { | |
411 | int r, d, p, n, k, j; | |
412 | ||
413 | r = -1; | |
414 | k = 0; | |
415 | j = 0; | |
416 | ||
417 | if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, | |
418 | fun, "completion")) { | |
419 | r = 0; | |
420 | while (read_reg(cd, 7) & IDE_DRQ) { | |
421 | d = read_reg(cd, 4) + 256 * read_reg(cd, 5); | |
422 | n = (d + 3) & 0xfffc; | |
423 | p = read_reg(cd, 2) & 3; | |
424 | ||
425 | if ((p == 2) && (n > 0) && (j == 0)) { | |
426 | pi_read_block(cd->pi, buf, n); | |
427 | if (verbose > 1) | |
428 | printk("%s: %s: Read %d bytes\n", | |
429 | cd->name, fun, n); | |
430 | r = 0; | |
431 | j++; | |
432 | } else { | |
433 | if (verbose > 1) | |
434 | printk | |
435 | ("%s: %s: Unexpected phase %d, d=%d, k=%d\n", | |
436 | cd->name, fun, p, d, k); | |
49b3a3cb MS |
437 | if (verbose < 2) |
438 | printk_once( | |
439 | "%s: WARNING: ATAPI phase errors\n", | |
440 | cd->name); | |
1da177e4 LT |
441 | mdelay(1); |
442 | } | |
443 | if (k++ > PCD_TMO) { | |
444 | printk("%s: Stuck DRQ\n", cd->name); | |
445 | break; | |
446 | } | |
447 | if (pcd_wait | |
448 | (cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun, | |
449 | "completion")) { | |
450 | r = -1; | |
451 | break; | |
452 | } | |
453 | } | |
454 | } | |
455 | ||
456 | pi_disconnect(cd->pi); | |
457 | ||
458 | return r; | |
459 | } | |
460 | ||
461 | static void pcd_req_sense(struct pcd_unit *cd, char *fun) | |
462 | { | |
463 | char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 }; | |
464 | char buf[16]; | |
465 | int r, c; | |
466 | ||
467 | r = pcd_command(cd, rs_cmd, 16, "Request sense"); | |
468 | mdelay(1); | |
469 | if (!r) | |
470 | pcd_completion(cd, buf, "Request sense"); | |
471 | ||
472 | cd->last_sense = -1; | |
473 | c = 2; | |
474 | if (!r) { | |
475 | if (fun) | |
476 | printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n", | |
477 | cd->name, fun, buf[2] & 0xf, buf[12], buf[13]); | |
478 | c = buf[2] & 0xf; | |
479 | cd->last_sense = | |
480 | c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16); | |
481 | } | |
482 | if ((c == 2) || (c == 6)) | |
483 | cd->changed = 1; | |
484 | } | |
485 | ||
486 | static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun) | |
487 | { | |
488 | int r; | |
489 | ||
490 | r = pcd_command(cd, cmd, dlen, fun); | |
491 | mdelay(1); | |
492 | if (!r) | |
493 | r = pcd_completion(cd, buf, fun); | |
494 | if (r) | |
495 | pcd_req_sense(cd, fun); | |
496 | ||
497 | return r; | |
498 | } | |
499 | ||
500 | static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc) | |
501 | { | |
502 | return pcd_atapi(cdi->handle, cgc->cmd, cgc->buflen, cgc->buffer, | |
503 | "generic packet"); | |
504 | } | |
505 | ||
506 | #define DBMSG(msg) ((verbose>1)?(msg):NULL) | |
507 | ||
b1b56b93 TH |
508 | static unsigned int pcd_check_events(struct cdrom_device_info *cdi, |
509 | unsigned int clearing, int slot_nr) | |
1da177e4 LT |
510 | { |
511 | struct pcd_unit *cd = cdi->handle; | |
512 | int res = cd->changed; | |
513 | if (res) | |
514 | cd->changed = 0; | |
b1b56b93 | 515 | return res ? DISK_EVENT_MEDIA_CHANGE : 0; |
1da177e4 LT |
516 | } |
517 | ||
518 | static int pcd_lock_door(struct cdrom_device_info *cdi, int lock) | |
519 | { | |
520 | char un_cmd[12] = { 0x1e, 0, 0, 0, lock, 0, 0, 0, 0, 0, 0, 0 }; | |
521 | ||
522 | return pcd_atapi(cdi->handle, un_cmd, 0, pcd_scratch, | |
523 | lock ? "lock door" : "unlock door"); | |
524 | } | |
525 | ||
526 | static int pcd_tray_move(struct cdrom_device_info *cdi, int position) | |
527 | { | |
528 | char ej_cmd[12] = { 0x1b, 0, 0, 0, 3 - position, 0, 0, 0, 0, 0, 0, 0 }; | |
529 | ||
530 | return pcd_atapi(cdi->handle, ej_cmd, 0, pcd_scratch, | |
531 | position ? "eject" : "close tray"); | |
532 | } | |
533 | ||
534 | static void pcd_sleep(int cs) | |
535 | { | |
86e84862 | 536 | schedule_timeout_interruptible(cs); |
1da177e4 LT |
537 | } |
538 | ||
539 | static int pcd_reset(struct pcd_unit *cd) | |
540 | { | |
541 | int i, k, flg; | |
542 | int expect[5] = { 1, 1, 1, 0x14, 0xeb }; | |
543 | ||
544 | pi_connect(cd->pi); | |
545 | write_reg(cd, 6, 0xa0 + 0x10 * cd->drive); | |
546 | write_reg(cd, 7, 8); | |
547 | ||
548 | pcd_sleep(20 * HZ / 1000); /* delay a bit */ | |
549 | ||
550 | k = 0; | |
551 | while ((k++ < PCD_RESET_TMO) && (status_reg(cd) & IDE_BUSY)) | |
552 | pcd_sleep(HZ / 10); | |
553 | ||
554 | flg = 1; | |
555 | for (i = 0; i < 5; i++) | |
556 | flg &= (read_reg(cd, i + 1) == expect[i]); | |
557 | ||
558 | if (verbose) { | |
559 | printk("%s: Reset (%d) signature = ", cd->name, k); | |
560 | for (i = 0; i < 5; i++) | |
561 | printk("%3x", read_reg(cd, i + 1)); | |
562 | if (!flg) | |
563 | printk(" (incorrect)"); | |
564 | printk("\n"); | |
565 | } | |
566 | ||
567 | pi_disconnect(cd->pi); | |
568 | return flg - 1; | |
569 | } | |
570 | ||
571 | static int pcd_drive_reset(struct cdrom_device_info *cdi) | |
572 | { | |
573 | return pcd_reset(cdi->handle); | |
574 | } | |
575 | ||
576 | static int pcd_ready_wait(struct pcd_unit *cd, int tmo) | |
577 | { | |
578 | char tr_cmd[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; | |
579 | int k, p; | |
580 | ||
581 | k = 0; | |
582 | while (k < tmo) { | |
583 | cd->last_sense = 0; | |
584 | pcd_atapi(cd, tr_cmd, 0, NULL, DBMSG("test unit ready")); | |
585 | p = cd->last_sense; | |
586 | if (!p) | |
587 | return 0; | |
588 | if (!(((p & 0xffff) == 0x0402) || ((p & 0xff) == 6))) | |
589 | return p; | |
590 | k++; | |
591 | pcd_sleep(HZ); | |
592 | } | |
593 | return 0x000020; /* timeout */ | |
594 | } | |
595 | ||
596 | static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr) | |
597 | { | |
598 | char rc_cmd[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; | |
599 | struct pcd_unit *cd = cdi->handle; | |
600 | ||
601 | if (pcd_ready_wait(cd, PCD_READY_TMO)) | |
602 | return CDS_DRIVE_NOT_READY; | |
603 | if (pcd_atapi(cd, rc_cmd, 8, pcd_scratch, DBMSG("check media"))) | |
604 | return CDS_NO_DISC; | |
605 | return CDS_DISC_OK; | |
606 | } | |
607 | ||
608 | static int pcd_identify(struct pcd_unit *cd, char *id) | |
609 | { | |
610 | int k, s; | |
611 | char id_cmd[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 }; | |
612 | ||
613 | pcd_bufblk = -1; | |
614 | ||
615 | s = pcd_atapi(cd, id_cmd, 36, pcd_buffer, "identify"); | |
616 | ||
617 | if (s) | |
618 | return -1; | |
619 | if ((pcd_buffer[0] & 0x1f) != 5) { | |
620 | if (verbose) | |
621 | printk("%s: %s is not a CD-ROM\n", | |
622 | cd->name, cd->drive ? "Slave" : "Master"); | |
623 | return -1; | |
624 | } | |
625 | memcpy(id, pcd_buffer + 16, 16); | |
626 | id[16] = 0; | |
627 | k = 16; | |
628 | while ((k >= 0) && (id[k] <= 0x20)) { | |
629 | id[k] = 0; | |
630 | k--; | |
631 | } | |
632 | ||
633 | printk("%s: %s: %s\n", cd->name, cd->drive ? "Slave" : "Master", id); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * returns 0, with id set if drive is detected | |
640 | * -1, if drive detection failed | |
641 | */ | |
642 | static int pcd_probe(struct pcd_unit *cd, int ms, char *id) | |
643 | { | |
644 | if (ms == -1) { | |
645 | for (cd->drive = 0; cd->drive <= 1; cd->drive++) | |
646 | if (!pcd_reset(cd) && !pcd_identify(cd, id)) | |
647 | return 0; | |
648 | } else { | |
649 | cd->drive = ms; | |
650 | if (!pcd_reset(cd) && !pcd_identify(cd, id)) | |
651 | return 0; | |
652 | } | |
653 | return -1; | |
654 | } | |
655 | ||
656 | static void pcd_probe_capabilities(void) | |
657 | { | |
658 | int unit, r; | |
659 | char buffer[32]; | |
660 | char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 }; | |
661 | struct pcd_unit *cd; | |
662 | ||
663 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
664 | if (!cd->present) | |
665 | continue; | |
666 | r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities"); | |
667 | if (r) | |
668 | continue; | |
669 | /* we should now have the cap page */ | |
670 | if ((buffer[11] & 1) == 0) | |
671 | cd->info.mask |= CDC_CD_R; | |
672 | if ((buffer[11] & 2) == 0) | |
673 | cd->info.mask |= CDC_CD_RW; | |
674 | if ((buffer[12] & 1) == 0) | |
675 | cd->info.mask |= CDC_PLAY_AUDIO; | |
676 | if ((buffer[14] & 1) == 0) | |
677 | cd->info.mask |= CDC_LOCK; | |
678 | if ((buffer[14] & 8) == 0) | |
679 | cd->info.mask |= CDC_OPEN_TRAY; | |
680 | if ((buffer[14] >> 6) == 0) | |
681 | cd->info.mask |= CDC_CLOSE_TRAY; | |
682 | } | |
683 | } | |
684 | ||
685 | static int pcd_detect(void) | |
686 | { | |
687 | char id[18]; | |
688 | int k, unit; | |
689 | struct pcd_unit *cd; | |
690 | ||
691 | printk("%s: %s version %s, major %d, nice %d\n", | |
692 | name, name, PCD_VERSION, major, nice); | |
693 | ||
9f4ba6b0 SM |
694 | par_drv = pi_register_driver(name); |
695 | if (!par_drv) { | |
696 | pr_err("failed to register %s driver\n", name); | |
697 | return -1; | |
698 | } | |
699 | ||
1da177e4 LT |
700 | k = 0; |
701 | if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */ | |
702 | cd = pcd; | |
703 | if (pi_init(cd->pi, 1, -1, -1, -1, -1, -1, pcd_buffer, | |
704 | PI_PCD, verbose, cd->name)) { | |
705 | if (!pcd_probe(cd, -1, id) && cd->disk) { | |
706 | cd->present = 1; | |
707 | k++; | |
708 | } else | |
709 | pi_release(cd->pi); | |
710 | } | |
711 | } else { | |
712 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
713 | int *conf = *drives[unit]; | |
714 | if (!conf[D_PRT]) | |
715 | continue; | |
716 | if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD], | |
717 | conf[D_UNI], conf[D_PRO], conf[D_DLY], | |
718 | pcd_buffer, PI_PCD, verbose, cd->name)) | |
719 | continue; | |
720 | if (!pcd_probe(cd, conf[D_SLV], id) && cd->disk) { | |
721 | cd->present = 1; | |
722 | k++; | |
723 | } else | |
724 | pi_release(cd->pi); | |
725 | } | |
726 | } | |
727 | if (k) | |
728 | return 0; | |
729 | ||
730 | printk("%s: No CD-ROM drive found\n", name); | |
731 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) | |
732 | put_disk(cd->disk); | |
9f4ba6b0 | 733 | pi_unregister_driver(par_drv); |
1da177e4 LT |
734 | return -1; |
735 | } | |
736 | ||
737 | /* I/O request processing */ | |
738 | static struct request_queue *pcd_queue; | |
739 | ||
165125e1 | 740 | static void do_pcd_request(struct request_queue * q) |
1da177e4 LT |
741 | { |
742 | if (pcd_busy) | |
743 | return; | |
744 | while (1) { | |
b12d4f82 | 745 | if (!pcd_req) { |
9934c8c0 | 746 | pcd_req = blk_fetch_request(q); |
b12d4f82 TH |
747 | if (!pcd_req) |
748 | return; | |
b12d4f82 | 749 | } |
1da177e4 LT |
750 | |
751 | if (rq_data_dir(pcd_req) == READ) { | |
752 | struct pcd_unit *cd = pcd_req->rq_disk->private_data; | |
753 | if (cd != pcd_current) | |
754 | pcd_bufblk = -1; | |
755 | pcd_current = cd; | |
83096ebf TH |
756 | pcd_sector = blk_rq_pos(pcd_req); |
757 | pcd_count = blk_rq_cur_sectors(pcd_req); | |
b4f42e28 | 758 | pcd_buf = bio_data(pcd_req->bio); |
1da177e4 LT |
759 | pcd_busy = 1; |
760 | ps_set_intr(do_pcd_read, NULL, 0, nice); | |
761 | return; | |
b12d4f82 TH |
762 | } else { |
763 | __blk_end_request_all(pcd_req, -EIO); | |
764 | pcd_req = NULL; | |
765 | } | |
1da177e4 LT |
766 | } |
767 | } | |
768 | ||
f06d9a2b | 769 | static inline void next_request(int err) |
1da177e4 LT |
770 | { |
771 | unsigned long saved_flags; | |
772 | ||
773 | spin_lock_irqsave(&pcd_lock, saved_flags); | |
b12d4f82 TH |
774 | if (!__blk_end_request_cur(pcd_req, err)) |
775 | pcd_req = NULL; | |
1da177e4 LT |
776 | pcd_busy = 0; |
777 | do_pcd_request(pcd_queue); | |
778 | spin_unlock_irqrestore(&pcd_lock, saved_flags); | |
779 | } | |
780 | ||
781 | static int pcd_ready(void) | |
782 | { | |
783 | return (((status_reg(pcd_current) & (IDE_BUSY | IDE_DRQ)) == IDE_DRQ)); | |
784 | } | |
785 | ||
786 | static void pcd_transfer(void) | |
787 | { | |
788 | ||
789 | while (pcd_count && (pcd_sector / 4 == pcd_bufblk)) { | |
790 | int o = (pcd_sector % 4) * 512; | |
791 | memcpy(pcd_buf, pcd_buffer + o, 512); | |
792 | pcd_count--; | |
793 | pcd_buf += 512; | |
794 | pcd_sector++; | |
795 | } | |
796 | } | |
797 | ||
798 | static void pcd_start(void) | |
799 | { | |
800 | int b, i; | |
801 | char rd_cmd[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }; | |
802 | ||
803 | pcd_bufblk = pcd_sector / 4; | |
804 | b = pcd_bufblk; | |
805 | for (i = 0; i < 4; i++) { | |
806 | rd_cmd[5 - i] = b & 0xff; | |
807 | b = b >> 8; | |
808 | } | |
809 | ||
810 | if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) { | |
811 | pcd_bufblk = -1; | |
f06d9a2b | 812 | next_request(-EIO); |
1da177e4 LT |
813 | return; |
814 | } | |
815 | ||
816 | mdelay(1); | |
817 | ||
818 | ps_set_intr(do_pcd_read_drq, pcd_ready, PCD_TMO, nice); | |
819 | } | |
820 | ||
821 | static void do_pcd_read(void) | |
822 | { | |
823 | pcd_busy = 1; | |
824 | pcd_retries = 0; | |
825 | pcd_transfer(); | |
826 | if (!pcd_count) { | |
f06d9a2b | 827 | next_request(0); |
1da177e4 LT |
828 | return; |
829 | } | |
830 | ||
831 | pi_do_claimed(pcd_current->pi, pcd_start); | |
832 | } | |
833 | ||
834 | static void do_pcd_read_drq(void) | |
835 | { | |
836 | unsigned long saved_flags; | |
837 | ||
838 | if (pcd_completion(pcd_current, pcd_buffer, "read block")) { | |
839 | if (pcd_retries < PCD_RETRIES) { | |
840 | mdelay(1); | |
841 | pcd_retries++; | |
842 | pi_do_claimed(pcd_current->pi, pcd_start); | |
843 | return; | |
844 | } | |
845 | pcd_bufblk = -1; | |
f06d9a2b | 846 | next_request(-EIO); |
1da177e4 LT |
847 | return; |
848 | } | |
849 | ||
850 | do_pcd_read(); | |
851 | spin_lock_irqsave(&pcd_lock, saved_flags); | |
852 | do_pcd_request(pcd_queue); | |
853 | spin_unlock_irqrestore(&pcd_lock, saved_flags); | |
854 | } | |
855 | ||
856 | /* the audio_ioctl stuff is adapted from sr_ioctl.c */ | |
857 | ||
858 | static int pcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) | |
859 | { | |
860 | struct pcd_unit *cd = cdi->handle; | |
861 | ||
862 | switch (cmd) { | |
863 | ||
864 | case CDROMREADTOCHDR: | |
865 | ||
866 | { | |
867 | char cmd[12] = | |
868 | { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12, | |
869 | 0, 0, 0 }; | |
870 | struct cdrom_tochdr *tochdr = | |
871 | (struct cdrom_tochdr *) arg; | |
872 | char buffer[32]; | |
873 | int r; | |
874 | ||
875 | r = pcd_atapi(cd, cmd, 12, buffer, "read toc header"); | |
876 | ||
877 | tochdr->cdth_trk0 = buffer[2]; | |
878 | tochdr->cdth_trk1 = buffer[3]; | |
879 | ||
880 | return r ? -EIO : 0; | |
881 | } | |
882 | ||
883 | case CDROMREADTOCENTRY: | |
884 | ||
885 | { | |
886 | char cmd[12] = | |
887 | { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12, | |
888 | 0, 0, 0 }; | |
889 | ||
890 | struct cdrom_tocentry *tocentry = | |
891 | (struct cdrom_tocentry *) arg; | |
892 | unsigned char buffer[32]; | |
893 | int r; | |
894 | ||
895 | cmd[1] = | |
896 | (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0); | |
897 | cmd[6] = tocentry->cdte_track; | |
898 | ||
899 | r = pcd_atapi(cd, cmd, 12, buffer, "read toc entry"); | |
900 | ||
901 | tocentry->cdte_ctrl = buffer[5] & 0xf; | |
902 | tocentry->cdte_adr = buffer[5] >> 4; | |
903 | tocentry->cdte_datamode = | |
904 | (tocentry->cdte_ctrl & 0x04) ? 1 : 0; | |
905 | if (tocentry->cdte_format == CDROM_MSF) { | |
906 | tocentry->cdte_addr.msf.minute = buffer[9]; | |
907 | tocentry->cdte_addr.msf.second = buffer[10]; | |
908 | tocentry->cdte_addr.msf.frame = buffer[11]; | |
909 | } else | |
910 | tocentry->cdte_addr.lba = | |
911 | (((((buffer[8] << 8) + buffer[9]) << 8) | |
912 | + buffer[10]) << 8) + buffer[11]; | |
913 | ||
914 | return r ? -EIO : 0; | |
915 | } | |
916 | ||
917 | default: | |
918 | ||
919 | return -ENOSYS; | |
920 | } | |
921 | } | |
922 | ||
923 | static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) | |
924 | { | |
925 | char cmd[12] = | |
926 | { GPCMD_READ_SUBCHANNEL, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 }; | |
927 | char buffer[32]; | |
928 | ||
929 | if (pcd_atapi(cdi->handle, cmd, 24, buffer, "get mcn")) | |
930 | return -EIO; | |
931 | ||
932 | memcpy(mcn->medium_catalog_number, buffer + 9, 13); | |
933 | mcn->medium_catalog_number[13] = 0; | |
934 | ||
935 | return 0; | |
936 | } | |
937 | ||
938 | static int __init pcd_init(void) | |
939 | { | |
940 | struct pcd_unit *cd; | |
941 | int unit; | |
942 | ||
943 | if (disable) | |
8bca98ca | 944 | return -EINVAL; |
1da177e4 LT |
945 | |
946 | pcd_init_units(); | |
947 | ||
948 | if (pcd_detect()) | |
8bca98ca | 949 | return -ENODEV; |
1da177e4 LT |
950 | |
951 | /* get the atapi capabilities page */ | |
952 | pcd_probe_capabilities(); | |
953 | ||
954 | if (register_blkdev(major, name)) { | |
955 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) | |
956 | put_disk(cd->disk); | |
8bca98ca | 957 | return -EBUSY; |
1da177e4 LT |
958 | } |
959 | ||
960 | pcd_queue = blk_init_queue(do_pcd_request, &pcd_lock); | |
961 | if (!pcd_queue) { | |
962 | unregister_blkdev(major, name); | |
963 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) | |
964 | put_disk(cd->disk); | |
8bca98ca | 965 | return -ENOMEM; |
1da177e4 LT |
966 | } |
967 | ||
968 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
969 | if (cd->present) { | |
970 | register_cdrom(&cd->info); | |
971 | cd->disk->private_data = cd; | |
972 | cd->disk->queue = pcd_queue; | |
973 | add_disk(cd->disk); | |
974 | } | |
975 | } | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
980 | static void __exit pcd_exit(void) | |
981 | { | |
982 | struct pcd_unit *cd; | |
983 | int unit; | |
984 | ||
985 | for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) { | |
986 | if (cd->present) { | |
987 | del_gendisk(cd->disk); | |
988 | pi_release(cd->pi); | |
989 | unregister_cdrom(&cd->info); | |
990 | } | |
991 | put_disk(cd->disk); | |
992 | } | |
993 | blk_cleanup_queue(pcd_queue); | |
994 | unregister_blkdev(major, name); | |
9f4ba6b0 | 995 | pi_unregister_driver(par_drv); |
1da177e4 LT |
996 | } |
997 | ||
998 | MODULE_LICENSE("GPL"); | |
999 | module_init(pcd_init) | |
1000 | module_exit(pcd_exit) |