Commit | Line | Data |
---|---|---|
594c16d8 BZ |
1 | /* |
2 | * ATAPI support. | |
3 | */ | |
4 | ||
5 | #include <linux/kernel.h> | |
4cad085e | 6 | #include <linux/cdrom.h> |
594c16d8 BZ |
7 | #include <linux/delay.h> |
8 | #include <linux/ide.h> | |
479edf06 GU |
9 | #include <linux/scatterlist.h> |
10 | ||
646c0cb6 BZ |
11 | #include <scsi/scsi.h> |
12 | ||
13 | #ifdef DEBUG | |
14 | #define debug_log(fmt, args...) \ | |
15 | printk(KERN_INFO "ide: " fmt, ## args) | |
16 | #else | |
17 | #define debug_log(fmt, args...) do {} while (0) | |
18 | #endif | |
19 | ||
8c662852 BP |
20 | #define ATAPI_MIN_CDB_BYTES 12 |
21 | ||
991cb26a BP |
22 | static inline int dev_is_idecd(ide_drive_t *drive) |
23 | { | |
5317464d | 24 | return drive->media == ide_cdrom || drive->media == ide_optical; |
991cb26a BP |
25 | } |
26 | ||
51509eec BZ |
27 | /* |
28 | * Check whether we can support a device, | |
29 | * based on the ATAPI IDENTIFY command results. | |
30 | */ | |
31 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
32 | { | |
33 | u16 *id = drive->id; | |
34 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
35 | ||
36 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
37 | ||
38 | protocol = (gcw[1] & 0xC0) >> 6; | |
39 | device_type = gcw[1] & 0x1F; | |
40 | removable = (gcw[0] & 0x80) >> 7; | |
41 | drq_type = (gcw[0] & 0x60) >> 5; | |
42 | packet_size = gcw[0] & 0x03; | |
43 | ||
44 | #ifdef CONFIG_PPC | |
45 | /* kludge for Apple PowerBook internal zip */ | |
46 | if (drive->media == ide_floppy && device_type == 5 && | |
47 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
48 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
49 | device_type = 0; | |
50 | #endif | |
51 | ||
52 | if (protocol != 2) | |
53 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
54 | s, drive->name, protocol); | |
55 | else if ((drive->media == ide_floppy && device_type != 0) || | |
56 | (drive->media == ide_tape && device_type != 1)) | |
57 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
58 | s, drive->name, device_type); | |
59 | else if (removable == 0) | |
60 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
61 | s, drive->name); | |
62 | else if (drive->media == ide_floppy && drq_type == 3) | |
63 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
64 | "supported\n", s, drive->name, drq_type); | |
65 | else if (packet_size != 0) | |
66 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
67 | "bytes\n", s, drive->name, packet_size); | |
68 | else | |
69 | return 1; | |
70 | return 0; | |
71 | } | |
72 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
73 | ||
7bf7420a BZ |
74 | void ide_init_pc(struct ide_atapi_pc *pc) |
75 | { | |
76 | memset(pc, 0, sizeof(*pc)); | |
77 | pc->buf = pc->pc_buf; | |
78 | pc->buf_size = IDE_PC_BUFFER_SIZE; | |
79 | } | |
80 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
81 | ||
2ac07d92 BZ |
82 | /* |
83 | * Add a special packet command request to the tail of the request queue, | |
84 | * and wait for it to be serviced. | |
85 | */ | |
86 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
87 | struct ide_atapi_pc *pc) | |
88 | { | |
89 | struct request *rq; | |
90 | int error; | |
91 | ||
92 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
93 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
c267cc1c | 94 | rq->special = (char *)pc; |
3eb76c1c BP |
95 | |
96 | if (pc->req_xfer) { | |
5c4be572 TH |
97 | error = blk_rq_map_kern(drive->queue, rq, pc->buf, pc->req_xfer, |
98 | GFP_NOIO); | |
99 | if (error) | |
100 | goto put_req; | |
3eb76c1c BP |
101 | } |
102 | ||
2ac07d92 BZ |
103 | memcpy(rq->cmd, pc->c, 12); |
104 | if (drive->media == ide_tape) | |
105 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
106 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
5c4be572 | 107 | put_req: |
2ac07d92 | 108 | blk_put_request(rq); |
2ac07d92 BZ |
109 | return error; |
110 | } | |
111 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
112 | ||
de699ad5 BZ |
113 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
114 | { | |
115 | struct ide_atapi_pc pc; | |
116 | ||
117 | ide_init_pc(&pc); | |
118 | pc.c[0] = TEST_UNIT_READY; | |
119 | ||
120 | return ide_queue_pc_tail(drive, disk, &pc); | |
121 | } | |
122 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
123 | ||
0c8a6c7a BZ |
124 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
125 | { | |
126 | struct ide_atapi_pc pc; | |
127 | ||
128 | ide_init_pc(&pc); | |
129 | pc.c[0] = START_STOP; | |
130 | pc.c[4] = start; | |
131 | ||
132 | if (drive->media == ide_tape) | |
133 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
134 | ||
135 | return ide_queue_pc_tail(drive, disk, &pc); | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
138 | ||
0578042d BZ |
139 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
140 | { | |
141 | struct ide_atapi_pc pc; | |
142 | ||
42619d35 | 143 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
144 | return 0; |
145 | ||
146 | ide_init_pc(&pc); | |
147 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
148 | pc.c[4] = on; | |
149 | ||
150 | return ide_queue_pc_tail(drive, disk, &pc); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
153 | ||
6b0da28b BZ |
154 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
155 | { | |
156 | ide_init_pc(pc); | |
157 | pc->c[0] = REQUEST_SENSE; | |
158 | if (drive->media == ide_floppy) { | |
159 | pc->c[4] = 255; | |
160 | pc->req_xfer = 18; | |
161 | } else { | |
162 | pc->c[4] = 20; | |
163 | pc->req_xfer = 20; | |
164 | } | |
165 | } | |
166 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
167 | ||
a1df5169 BP |
168 | void ide_prep_sense(ide_drive_t *drive, struct request *rq) |
169 | { | |
170 | struct request_sense *sense = &drive->sense_data; | |
171 | struct request *sense_rq = &drive->sense_rq; | |
172 | unsigned int cmd_len, sense_len; | |
5c4be572 | 173 | int err; |
a1df5169 BP |
174 | |
175 | debug_log("%s: enter\n", __func__); | |
176 | ||
177 | switch (drive->media) { | |
178 | case ide_floppy: | |
179 | cmd_len = 255; | |
180 | sense_len = 18; | |
181 | break; | |
182 | case ide_tape: | |
183 | cmd_len = 20; | |
184 | sense_len = 20; | |
185 | break; | |
186 | default: | |
187 | cmd_len = 18; | |
188 | sense_len = 18; | |
189 | } | |
190 | ||
191 | BUG_ON(sense_len > sizeof(*sense)); | |
192 | ||
193 | if (blk_sense_request(rq) || drive->sense_rq_armed) | |
194 | return; | |
195 | ||
196 | memset(sense, 0, sizeof(*sense)); | |
197 | ||
198 | blk_rq_init(rq->q, sense_rq); | |
a1df5169 | 199 | |
5c4be572 TH |
200 | err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len, |
201 | GFP_NOIO); | |
202 | if (unlikely(err)) { | |
203 | if (printk_ratelimit()) | |
204 | printk(KERN_WARNING "%s: failed to map sense buffer\n", | |
205 | drive->name); | |
206 | return; | |
207 | } | |
208 | ||
209 | sense_rq->rq_disk = rq->rq_disk; | |
a1df5169 BP |
210 | sense_rq->cmd[0] = GPCMD_REQUEST_SENSE; |
211 | sense_rq->cmd[4] = cmd_len; | |
a1df5169 BP |
212 | sense_rq->cmd_type = REQ_TYPE_SENSE; |
213 | sense_rq->cmd_flags |= REQ_PREEMPT; | |
214 | ||
215 | if (drive->media == ide_tape) | |
216 | sense_rq->cmd[13] = REQ_IDETAPE_PC1; | |
217 | ||
218 | drive->sense_rq_armed = true; | |
219 | } | |
220 | EXPORT_SYMBOL_GPL(ide_prep_sense); | |
221 | ||
5c4be572 | 222 | int ide_queue_sense_rq(ide_drive_t *drive, void *special) |
a1df5169 | 223 | { |
5c4be572 TH |
224 | /* deferred failure from ide_prep_sense() */ |
225 | if (!drive->sense_rq_armed) { | |
226 | printk(KERN_WARNING "%s: failed queue sense request\n", | |
227 | drive->name); | |
228 | return -ENOMEM; | |
229 | } | |
a1df5169 BP |
230 | |
231 | drive->sense_rq.special = special; | |
232 | drive->sense_rq_armed = false; | |
233 | ||
234 | drive->hwif->rq = NULL; | |
235 | ||
236 | elv_add_request(drive->queue, &drive->sense_rq, | |
237 | ELEVATOR_INSERT_FRONT, 0); | |
5c4be572 | 238 | return 0; |
a1df5169 BP |
239 | } |
240 | EXPORT_SYMBOL_GPL(ide_queue_sense_rq); | |
241 | ||
6b0da28b BZ |
242 | /* |
243 | * Called when an error was detected during the last packet command. | |
6b544fcc BP |
244 | * We queue a request sense packet command at the head of the request |
245 | * queue. | |
6b0da28b | 246 | */ |
6b544fcc | 247 | void ide_retry_pc(ide_drive_t *drive) |
6b0da28b | 248 | { |
6b544fcc | 249 | struct request *sense_rq = &drive->sense_rq; |
6b0da28b BZ |
250 | struct ide_atapi_pc *pc = &drive->request_sense_pc; |
251 | ||
252 | (void)ide_read_error(drive); | |
6b544fcc BP |
253 | |
254 | /* init pc from sense_rq */ | |
255 | ide_init_pc(pc); | |
256 | memcpy(pc->c, sense_rq->cmd, 12); | |
5c4be572 | 257 | pc->buf = bio_data(sense_rq->bio); /* pointer to mapped address */ |
6b544fcc BP |
258 | pc->req_xfer = sense_rq->data_len; |
259 | ||
6b0da28b BZ |
260 | if (drive->media == ide_tape) |
261 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); | |
6b544fcc | 262 | |
5c4be572 TH |
263 | if (ide_queue_sense_rq(drive, pc)) |
264 | ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq)); | |
6b0da28b BZ |
265 | } |
266 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
267 | ||
4cad085e BP |
268 | int ide_cd_expiry(ide_drive_t *drive) |
269 | { | |
b65fac32 | 270 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
271 | unsigned long wait = 0; |
272 | ||
273 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
274 | ||
275 | /* | |
276 | * Some commands are *slow* and normally take a long time to complete. | |
277 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
278 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
279 | * for these. | |
280 | */ | |
281 | switch (rq->cmd[0]) { | |
282 | case GPCMD_BLANK: | |
283 | case GPCMD_FORMAT_UNIT: | |
284 | case GPCMD_RESERVE_RZONE_TRACK: | |
285 | case GPCMD_CLOSE_TRACK: | |
286 | case GPCMD_FLUSH_CACHE: | |
287 | wait = ATAPI_WAIT_PC; | |
288 | break; | |
289 | default: | |
290 | if (!(rq->cmd_flags & REQ_QUIET)) | |
291 | printk(KERN_INFO "cmd 0x%x timed out\n", | |
292 | rq->cmd[0]); | |
293 | wait = 0; | |
294 | break; | |
295 | } | |
296 | return wait; | |
297 | } | |
298 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
299 | ||
392de1d5 BP |
300 | int ide_cd_get_xferlen(struct request *rq) |
301 | { | |
302 | if (blk_fs_request(rq)) | |
303 | return 32768; | |
304 | else if (blk_sense_request(rq) || blk_pc_request(rq) || | |
305 | rq->cmd_type == REQ_TYPE_ATA_PC) | |
306 | return rq->data_len; | |
307 | else | |
308 | return 0; | |
309 | } | |
310 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
311 | ||
0d6a9754 BZ |
312 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
313 | { | |
3153c26b | 314 | struct ide_taskfile tf; |
0d6a9754 | 315 | |
3153c26b SS |
316 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
317 | IDE_VALID_LBAM | IDE_VALID_LBAH); | |
0d6a9754 | 318 | |
3153c26b SS |
319 | *bcount = (tf.lbah << 8) | tf.lbam; |
320 | *ireason = tf.nsect & 3; | |
0d6a9754 BZ |
321 | } |
322 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
323 | ||
aa5d2de7 BZ |
324 | /* |
325 | * This is the usual interrupt handler which will be called during a packet | |
326 | * command. We will transfer some of the data (as requested by the drive) | |
327 | * and will re-point interrupt handler to us. | |
328 | */ | |
329 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 330 | { |
2b9efba4 | 331 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 332 | ide_hwif_t *hwif = drive->hwif; |
f094d4d8 | 333 | struct ide_cmd *cmd = &hwif->cmd; |
b65fac32 | 334 | struct request *rq = hwif->rq; |
374e042c | 335 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
d93bc452 | 336 | unsigned int timeout, done; |
646c0cb6 | 337 | u16 bcount; |
5d655a03 | 338 | u8 stat, ireason, dsc = 0; |
d93bc452 | 339 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
646c0cb6 BZ |
340 | |
341 | debug_log("Enter %s - interrupt handler\n", __func__); | |
342 | ||
5d655a03 BP |
343 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
344 | : WAIT_TAPE_CMD; | |
844b9468 | 345 | |
646c0cb6 | 346 | /* Clear the interrupt */ |
374e042c | 347 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
348 | |
349 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
88b4132e | 350 | int rc; |
4453011f | 351 | |
88b4132e BZ |
352 | drive->waiting_for_dma = 0; |
353 | rc = hwif->dma_ops->dma_end(drive); | |
f094d4d8 | 354 | ide_dma_unmap_sg(drive, cmd); |
4453011f BZ |
355 | |
356 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { | |
5d655a03 | 357 | if (drive->media == ide_floppy) |
646c0cb6 BZ |
358 | printk(KERN_ERR "%s: DMA %s error\n", |
359 | drive->name, rq_data_dir(pc->rq) | |
360 | ? "write" : "read"); | |
361 | pc->flags |= PC_FLAG_DMA_ERROR; | |
6d700387 | 362 | } else |
646c0cb6 | 363 | pc->xferred = pc->req_xfer; |
646c0cb6 BZ |
364 | debug_log("%s: DMA finished\n", drive->name); |
365 | } | |
366 | ||
367 | /* No more interrupts */ | |
3a7d2484 | 368 | if ((stat & ATA_DRQ) == 0) { |
5b6c942d BP |
369 | int uptodate, error; |
370 | unsigned int done; | |
03a2faae | 371 | |
646c0cb6 BZ |
372 | debug_log("Packet command completed, %d bytes transferred\n", |
373 | pc->xferred); | |
374 | ||
375 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
376 | ||
377 | local_irq_enable_in_hardirq(); | |
378 | ||
5d655a03 | 379 | if (drive->media == ide_tape && |
3a7d2484 BZ |
380 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
381 | stat &= ~ATA_ERR; | |
8fccf899 | 382 | |
3a7d2484 | 383 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
384 | /* Error detected */ |
385 | debug_log("%s: I/O error\n", drive->name); | |
386 | ||
5d655a03 | 387 | if (drive->media != ide_tape) |
646c0cb6 | 388 | pc->rq->errors++; |
646c0cb6 | 389 | |
8fccf899 | 390 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
391 | printk(KERN_ERR "%s: I/O error in request sense" |
392 | " command\n", drive->name); | |
393 | return ide_do_reset(drive); | |
394 | } | |
395 | ||
8fccf899 | 396 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
397 | |
398 | /* Retry operation */ | |
6b544fcc | 399 | ide_retry_pc(drive); |
8fccf899 | 400 | |
646c0cb6 BZ |
401 | /* queued, but not started */ |
402 | return ide_stopped; | |
403 | } | |
646c0cb6 | 404 | pc->error = 0; |
b14c7212 BZ |
405 | |
406 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
407 | dsc = 1; | |
8fccf899 | 408 | |
b3071d19 TH |
409 | /* |
410 | * ->pc_callback() might change rq->data_len for | |
411 | * residual count, cache total length. | |
412 | */ | |
21d9c5d2 | 413 | done = blk_rq_bytes(rq); |
b3071d19 | 414 | |
646c0cb6 | 415 | /* Command finished - Call the callback function */ |
03a2faae BZ |
416 | uptodate = drive->pc_callback(drive, dsc); |
417 | ||
418 | if (uptodate == 0) | |
419 | drive->failed_pc = NULL; | |
420 | ||
6902a533 BZ |
421 | if (blk_special_request(rq)) { |
422 | rq->errors = 0; | |
5b6c942d | 423 | error = 0; |
89f78b32 | 424 | } else { |
349d12a1 | 425 | |
89f78b32 BZ |
426 | if (blk_fs_request(rq) == 0 && uptodate <= 0) { |
427 | if (rq->errors == 0) | |
428 | rq->errors = -EIO; | |
429 | } | |
349d12a1 | 430 | |
5b6c942d | 431 | error = uptodate ? 0 : -EIO; |
89f78b32 | 432 | } |
8fccf899 | 433 | |
5b6c942d | 434 | ide_complete_rq(drive, error, done); |
646c0cb6 BZ |
435 | return ide_stopped; |
436 | } | |
437 | ||
438 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
439 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
440 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
441 | "in DMA mode\n", drive->name); | |
442 | ide_dma_off(drive); | |
443 | return ide_do_reset(drive); | |
444 | } | |
646c0cb6 | 445 | |
1823649b BZ |
446 | /* Get the number of bytes to transfer on this interrupt. */ |
447 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 448 | |
3a7d2484 | 449 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
450 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
451 | return ide_do_reset(drive); | |
452 | } | |
8fccf899 | 453 | |
d93bc452 | 454 | if (((ireason & ATAPI_IO) == ATAPI_IO) == write) { |
646c0cb6 BZ |
455 | /* Hopefully, we will never get here */ |
456 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
457 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
458 | (ireason & ATAPI_IO) ? "Write" : "Read", |
459 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
460 | return ide_do_reset(drive); |
461 | } | |
8fccf899 | 462 | |
6d700387 TH |
463 | done = min_t(unsigned int, bcount, cmd->nleft); |
464 | ide_pio_bytes(drive, cmd, write, done); | |
646c0cb6 | 465 | |
6d700387 | 466 | /* Update transferred byte count */ |
d93bc452 | 467 | pc->xferred += done; |
d93bc452 BZ |
468 | |
469 | bcount -= done; | |
470 | ||
471 | if (bcount) | |
472 | ide_pad_transfer(drive, write, bcount); | |
473 | ||
474 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes\n", | |
475 | rq->cmd[0], done, bcount); | |
646c0cb6 | 476 | |
646c0cb6 | 477 | /* And set the interrupt handler again */ |
60c0cd02 | 478 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
479 | return ide_started; |
480 | } | |
594c16d8 | 481 | |
60f85019 | 482 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
b788ee9c | 483 | u16 bcount, u8 dma) |
7a254df0 | 484 | { |
60f85019 SS |
485 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
486 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | | |
487 | IDE_VALID_FEATURE | valid_tf; | |
35b5d0be | 488 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
489 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
490 | cmd->tf.lbam = bcount & 0xff; | |
491 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
492 | } |
493 | ||
88a72109 BZ |
494 | static u8 ide_read_ireason(ide_drive_t *drive) |
495 | { | |
3153c26b | 496 | struct ide_taskfile tf; |
88a72109 | 497 | |
3153c26b | 498 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
88a72109 | 499 | |
3153c26b | 500 | return tf.nsect & 3; |
88a72109 BZ |
501 | } |
502 | ||
594c16d8 BZ |
503 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
504 | { | |
594c16d8 BZ |
505 | int retries = 100; |
506 | ||
3a7d2484 BZ |
507 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
508 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
509 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
510 | "a packet command, retrying\n", drive->name); | |
511 | udelay(100); | |
88a72109 | 512 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
513 | if (retries == 0) { |
514 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
515 | "a packet command, ignoring\n", | |
516 | drive->name); | |
3a7d2484 BZ |
517 | ireason |= ATAPI_COD; |
518 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
519 | } |
520 | } | |
521 | ||
522 | return ireason; | |
523 | } | |
524 | ||
baf08f0b BZ |
525 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
526 | { | |
527 | /* Send the actual packet */ | |
528 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
529 | ||
530 | /* Timeout for the packet command */ | |
531 | return WAIT_FLOPPY_CMD; | |
532 | } | |
533 | ||
534 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 535 | { |
b16aabc9 | 536 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 537 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 538 | struct request *rq = hwif->rq; |
baf08f0b BZ |
539 | ide_expiry_t *expiry; |
540 | unsigned int timeout; | |
8c662852 | 541 | int cmd_len; |
594c16d8 BZ |
542 | ide_startstop_t startstop; |
543 | u8 ireason; | |
544 | ||
3a7d2484 | 545 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
546 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
547 | "DRQ isn't asserted\n", drive->name); | |
548 | return startstop; | |
549 | } | |
550 | ||
5f25843f BP |
551 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
552 | if (drive->dma) | |
553 | drive->waiting_for_dma = 1; | |
554 | } | |
555 | ||
8c662852 BP |
556 | if (dev_is_idecd(drive)) { |
557 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
558 | cmd_len = COMMAND_SIZE(rq->cmd[0]); | |
559 | if (cmd_len < ATAPI_MIN_CDB_BYTES) | |
560 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 561 | |
def860d0 BP |
562 | timeout = rq->timeout; |
563 | expiry = ide_cd_expiry; | |
baf08f0b | 564 | } else { |
b16aabc9 BP |
565 | pc = drive->pc; |
566 | ||
def860d0 BP |
567 | cmd_len = ATAPI_MIN_CDB_BYTES; |
568 | ||
569 | /* | |
570 | * If necessary schedule the packet transfer to occur 'timeout' | |
571 | * miliseconds later in ide_delayed_transfer_pc() after the | |
572 | * device says it's ready for a packet. | |
573 | */ | |
574 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
575 | timeout = drive->pc_delay; | |
576 | expiry = &ide_delayed_transfer_pc; | |
577 | } else { | |
578 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
579 | : WAIT_TAPE_CMD; | |
580 | expiry = NULL; | |
581 | } | |
06cc2778 BP |
582 | |
583 | ireason = ide_read_ireason(drive); | |
584 | if (drive->media == ide_tape) | |
585 | ireason = ide_wait_ireason(drive, ireason); | |
586 | ||
587 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
588 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " | |
589 | "a packet command\n", drive->name); | |
590 | ||
591 | return ide_do_reset(drive); | |
592 | } | |
baf08f0b BZ |
593 | } |
594 | ||
60c0cd02 BZ |
595 | hwif->expiry = expiry; |
596 | ||
594c16d8 | 597 | /* Set the interrupt routine */ |
d6251d44 BP |
598 | ide_set_handler(drive, |
599 | (dev_is_idecd(drive) ? drive->irq_handler | |
600 | : ide_pc_intr), | |
60c0cd02 | 601 | timeout); |
594c16d8 | 602 | |
2eba0827 BP |
603 | /* Send the actual packet */ |
604 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
605 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); | |
606 | ||
594c16d8 | 607 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
608 | if (dev_is_idecd(drive)) { |
609 | if (drive->dma) | |
610 | hwif->dma_ops->dma_start(drive); | |
611 | } else { | |
612 | if (pc->flags & PC_FLAG_DMA_OK) { | |
613 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
614 | hwif->dma_ops->dma_start(drive); | |
615 | } | |
594c16d8 BZ |
616 | } |
617 | ||
594c16d8 BZ |
618 | return ide_started; |
619 | } | |
6bf1641c | 620 | |
b788ee9c | 621 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 622 | { |
d77612ab | 623 | struct ide_atapi_pc *pc; |
6bf1641c | 624 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 625 | ide_expiry_t *expiry = NULL; |
e6830a86 | 626 | struct request *rq = hwif->rq; |
28ad91db | 627 | unsigned int timeout; |
392de1d5 | 628 | u16 bcount; |
60f85019 | 629 | u8 valid_tf; |
35b5d0be | 630 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 631 | |
ed48554f | 632 | if (dev_is_idecd(drive)) { |
60f85019 | 633 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
e6830a86 | 634 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 635 | expiry = ide_cd_expiry; |
28ad91db | 636 | timeout = ATAPI_WAIT_PC; |
d77612ab | 637 | |
5ae5412d BZ |
638 | if (drive->dma) |
639 | drive->dma = !ide_dma_prepare(drive, cmd); | |
ed48554f | 640 | } else { |
d77612ab BP |
641 | pc = drive->pc; |
642 | ||
643 | /* We haven't transferred any data yet */ | |
644 | pc->xferred = 0; | |
d77612ab | 645 | |
60f85019 | 646 | valid_tf = IDE_VALID_DEVICE; |
ed48554f BP |
647 | bcount = ((drive->media == ide_tape) ? |
648 | pc->req_xfer : | |
649 | min(pc->req_xfer, 63 * 1024)); | |
6bf1641c | 650 | |
d77612ab BP |
651 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
652 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
653 | ide_dma_off(drive); | |
654 | } | |
6bf1641c | 655 | |
5ae5412d BZ |
656 | if (pc->flags & PC_FLAG_DMA_OK) |
657 | drive->dma = !ide_dma_prepare(drive, cmd); | |
6bf1641c | 658 | |
d77612ab BP |
659 | if (!drive->dma) |
660 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
661 | |
662 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
663 | : WAIT_TAPE_CMD; | |
d77612ab | 664 | } |
6bf1641c | 665 | |
60f85019 | 666 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
b788ee9c BZ |
667 | |
668 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 669 | |
35b5d0be | 670 | if (drq_int) { |
5f25843f BP |
671 | if (drive->dma) |
672 | drive->waiting_for_dma = 0; | |
22117d6e | 673 | hwif->expiry = expiry; |
6bf1641c | 674 | } |
35b5d0be BZ |
675 | |
676 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
677 | ||
678 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
679 | } |
680 | EXPORT_SYMBOL_GPL(ide_issue_pc); |