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 | ||
103f7033 BP |
13 | #define DRV_NAME "ide-atapi" |
14 | #define PFX DRV_NAME ": " | |
15 | ||
646c0cb6 BZ |
16 | #ifdef DEBUG |
17 | #define debug_log(fmt, args...) \ | |
18 | printk(KERN_INFO "ide: " fmt, ## args) | |
19 | #else | |
20 | #define debug_log(fmt, args...) do {} while (0) | |
21 | #endif | |
22 | ||
8c662852 BP |
23 | #define ATAPI_MIN_CDB_BYTES 12 |
24 | ||
991cb26a BP |
25 | static inline int dev_is_idecd(ide_drive_t *drive) |
26 | { | |
5317464d | 27 | return drive->media == ide_cdrom || drive->media == ide_optical; |
991cb26a BP |
28 | } |
29 | ||
51509eec BZ |
30 | /* |
31 | * Check whether we can support a device, | |
32 | * based on the ATAPI IDENTIFY command results. | |
33 | */ | |
34 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
35 | { | |
36 | u16 *id = drive->id; | |
37 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
38 | ||
39 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
40 | ||
41 | protocol = (gcw[1] & 0xC0) >> 6; | |
42 | device_type = gcw[1] & 0x1F; | |
43 | removable = (gcw[0] & 0x80) >> 7; | |
44 | drq_type = (gcw[0] & 0x60) >> 5; | |
45 | packet_size = gcw[0] & 0x03; | |
46 | ||
47 | #ifdef CONFIG_PPC | |
48 | /* kludge for Apple PowerBook internal zip */ | |
49 | if (drive->media == ide_floppy && device_type == 5 && | |
50 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
51 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
52 | device_type = 0; | |
53 | #endif | |
54 | ||
55 | if (protocol != 2) | |
56 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
57 | s, drive->name, protocol); | |
58 | else if ((drive->media == ide_floppy && device_type != 0) || | |
59 | (drive->media == ide_tape && device_type != 1)) | |
60 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
61 | s, drive->name, device_type); | |
62 | else if (removable == 0) | |
63 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
64 | s, drive->name); | |
65 | else if (drive->media == ide_floppy && drq_type == 3) | |
66 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
67 | "supported\n", s, drive->name, drq_type); | |
68 | else if (packet_size != 0) | |
69 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
70 | "bytes\n", s, drive->name, packet_size); | |
71 | else | |
72 | return 1; | |
73 | return 0; | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
76 | ||
7bf7420a BZ |
77 | void ide_init_pc(struct ide_atapi_pc *pc) |
78 | { | |
79 | memset(pc, 0, sizeof(*pc)); | |
7bf7420a BZ |
80 | } |
81 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
82 | ||
2ac07d92 BZ |
83 | /* |
84 | * Add a special packet command request to the tail of the request queue, | |
85 | * and wait for it to be serviced. | |
86 | */ | |
87 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
b13345f3 | 88 | struct ide_atapi_pc *pc, void *buf, unsigned int bufflen) |
2ac07d92 BZ |
89 | { |
90 | struct request *rq; | |
91 | int error; | |
92 | ||
93 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
94 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
c267cc1c | 95 | rq->special = (char *)pc; |
3eb76c1c | 96 | |
b13345f3 BP |
97 | if (buf && bufflen) { |
98 | error = blk_rq_map_kern(drive->queue, rq, buf, bufflen, | |
5c4be572 TH |
99 | GFP_NOIO); |
100 | if (error) | |
101 | goto put_req; | |
3eb76c1c BP |
102 | } |
103 | ||
2ac07d92 BZ |
104 | memcpy(rq->cmd, pc->c, 12); |
105 | if (drive->media == ide_tape) | |
106 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
107 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
5c4be572 | 108 | put_req: |
2ac07d92 | 109 | blk_put_request(rq); |
2ac07d92 BZ |
110 | return error; |
111 | } | |
112 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
113 | ||
de699ad5 BZ |
114 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
115 | { | |
116 | struct ide_atapi_pc pc; | |
117 | ||
118 | ide_init_pc(&pc); | |
119 | pc.c[0] = TEST_UNIT_READY; | |
120 | ||
b13345f3 | 121 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
de699ad5 BZ |
122 | } |
123 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
124 | ||
0c8a6c7a BZ |
125 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
126 | { | |
127 | struct ide_atapi_pc pc; | |
128 | ||
129 | ide_init_pc(&pc); | |
130 | pc.c[0] = START_STOP; | |
131 | pc.c[4] = start; | |
132 | ||
133 | if (drive->media == ide_tape) | |
134 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
135 | ||
b13345f3 | 136 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0c8a6c7a BZ |
137 | } |
138 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
139 | ||
0578042d BZ |
140 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
141 | { | |
142 | struct ide_atapi_pc pc; | |
143 | ||
42619d35 | 144 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
145 | return 0; |
146 | ||
147 | ide_init_pc(&pc); | |
148 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
149 | pc.c[4] = on; | |
150 | ||
b13345f3 | 151 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0578042d BZ |
152 | } |
153 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
154 | ||
6b0da28b BZ |
155 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
156 | { | |
157 | ide_init_pc(pc); | |
158 | pc->c[0] = REQUEST_SENSE; | |
159 | if (drive->media == ide_floppy) { | |
160 | pc->c[4] = 255; | |
161 | pc->req_xfer = 18; | |
162 | } else { | |
163 | pc->c[4] = 20; | |
164 | pc->req_xfer = 20; | |
165 | } | |
166 | } | |
167 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
168 | ||
a1df5169 BP |
169 | void ide_prep_sense(ide_drive_t *drive, struct request *rq) |
170 | { | |
171 | struct request_sense *sense = &drive->sense_data; | |
172 | struct request *sense_rq = &drive->sense_rq; | |
173 | unsigned int cmd_len, sense_len; | |
5c4be572 | 174 | int err; |
a1df5169 | 175 | |
a1df5169 BP |
176 | switch (drive->media) { |
177 | case ide_floppy: | |
178 | cmd_len = 255; | |
179 | sense_len = 18; | |
180 | break; | |
181 | case ide_tape: | |
182 | cmd_len = 20; | |
183 | sense_len = 20; | |
184 | break; | |
185 | default: | |
186 | cmd_len = 18; | |
187 | sense_len = 18; | |
188 | } | |
189 | ||
190 | BUG_ON(sense_len > sizeof(*sense)); | |
191 | ||
192 | if (blk_sense_request(rq) || drive->sense_rq_armed) | |
193 | return; | |
194 | ||
195 | memset(sense, 0, sizeof(*sense)); | |
196 | ||
197 | blk_rq_init(rq->q, sense_rq); | |
a1df5169 | 198 | |
5c4be572 TH |
199 | err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len, |
200 | GFP_NOIO); | |
201 | if (unlikely(err)) { | |
202 | if (printk_ratelimit()) | |
103f7033 BP |
203 | printk(KERN_WARNING PFX "%s: failed to map sense " |
204 | "buffer\n", drive->name); | |
5c4be572 TH |
205 | return; |
206 | } | |
207 | ||
208 | sense_rq->rq_disk = rq->rq_disk; | |
a1df5169 BP |
209 | sense_rq->cmd[0] = GPCMD_REQUEST_SENSE; |
210 | sense_rq->cmd[4] = cmd_len; | |
a1df5169 BP |
211 | sense_rq->cmd_type = REQ_TYPE_SENSE; |
212 | sense_rq->cmd_flags |= REQ_PREEMPT; | |
213 | ||
214 | if (drive->media == ide_tape) | |
215 | sense_rq->cmd[13] = REQ_IDETAPE_PC1; | |
216 | ||
217 | drive->sense_rq_armed = true; | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(ide_prep_sense); | |
220 | ||
5c4be572 | 221 | int ide_queue_sense_rq(ide_drive_t *drive, void *special) |
a1df5169 | 222 | { |
5c4be572 TH |
223 | /* deferred failure from ide_prep_sense() */ |
224 | if (!drive->sense_rq_armed) { | |
103f7033 | 225 | printk(KERN_WARNING PFX "%s: error queuing a sense request\n", |
5c4be572 TH |
226 | drive->name); |
227 | return -ENOMEM; | |
228 | } | |
a1df5169 BP |
229 | |
230 | drive->sense_rq.special = special; | |
231 | drive->sense_rq_armed = false; | |
232 | ||
233 | drive->hwif->rq = NULL; | |
234 | ||
235 | elv_add_request(drive->queue, &drive->sense_rq, | |
236 | ELEVATOR_INSERT_FRONT, 0); | |
5c4be572 | 237 | return 0; |
a1df5169 BP |
238 | } |
239 | EXPORT_SYMBOL_GPL(ide_queue_sense_rq); | |
240 | ||
6b0da28b BZ |
241 | /* |
242 | * Called when an error was detected during the last packet command. | |
6b544fcc BP |
243 | * We queue a request sense packet command at the head of the request |
244 | * queue. | |
6b0da28b | 245 | */ |
6b544fcc | 246 | void ide_retry_pc(ide_drive_t *drive) |
6b0da28b | 247 | { |
8f6205cd | 248 | struct request *failed_rq = drive->hwif->rq; |
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); | |
6b544fcc | 257 | |
6b0da28b | 258 | if (drive->media == ide_tape) |
626542ca | 259 | drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC; |
6b544fcc | 260 | |
8f6205cd TH |
261 | /* |
262 | * Push back the failed request and put request sense on top | |
263 | * of it. The failed command will be retried after sense data | |
264 | * is acquired. | |
265 | */ | |
266 | blk_requeue_request(failed_rq->q, failed_rq); | |
267 | drive->hwif->rq = NULL; | |
268 | if (ide_queue_sense_rq(drive, pc)) { | |
9934c8c0 | 269 | blk_start_request(failed_rq); |
8f6205cd TH |
270 | ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq)); |
271 | } | |
6b0da28b BZ |
272 | } |
273 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
274 | ||
4cad085e BP |
275 | int ide_cd_expiry(ide_drive_t *drive) |
276 | { | |
b65fac32 | 277 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
278 | unsigned long wait = 0; |
279 | ||
280 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
281 | ||
282 | /* | |
283 | * Some commands are *slow* and normally take a long time to complete. | |
284 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
285 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
286 | * for these. | |
287 | */ | |
288 | switch (rq->cmd[0]) { | |
289 | case GPCMD_BLANK: | |
290 | case GPCMD_FORMAT_UNIT: | |
291 | case GPCMD_RESERVE_RZONE_TRACK: | |
292 | case GPCMD_CLOSE_TRACK: | |
293 | case GPCMD_FLUSH_CACHE: | |
294 | wait = ATAPI_WAIT_PC; | |
295 | break; | |
296 | default: | |
297 | if (!(rq->cmd_flags & REQ_QUIET)) | |
103f7033 | 298 | printk(KERN_INFO PFX "cmd 0x%x timed out\n", |
4cad085e BP |
299 | rq->cmd[0]); |
300 | wait = 0; | |
301 | break; | |
302 | } | |
303 | return wait; | |
304 | } | |
305 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
306 | ||
392de1d5 BP |
307 | int ide_cd_get_xferlen(struct request *rq) |
308 | { | |
309 | if (blk_fs_request(rq)) | |
310 | return 32768; | |
311 | else if (blk_sense_request(rq) || blk_pc_request(rq) || | |
312 | rq->cmd_type == REQ_TYPE_ATA_PC) | |
34b7d2c9 | 313 | return blk_rq_bytes(rq); |
392de1d5 BP |
314 | else |
315 | return 0; | |
316 | } | |
317 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
318 | ||
0d6a9754 BZ |
319 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
320 | { | |
3153c26b | 321 | struct ide_taskfile tf; |
0d6a9754 | 322 | |
3153c26b SS |
323 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
324 | IDE_VALID_LBAM | IDE_VALID_LBAH); | |
0d6a9754 | 325 | |
3153c26b SS |
326 | *bcount = (tf.lbah << 8) | tf.lbam; |
327 | *ireason = tf.nsect & 3; | |
0d6a9754 BZ |
328 | } |
329 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
330 | ||
103f7033 BP |
331 | /* |
332 | * Check the contents of the interrupt reason register and attempt to recover if | |
333 | * there are problems. | |
334 | * | |
335 | * Returns: | |
336 | * - 0 if everything's ok | |
337 | * - 1 if the request has to be terminated. | |
338 | */ | |
339 | int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len, | |
340 | int ireason, int rw) | |
341 | { | |
342 | ide_hwif_t *hwif = drive->hwif; | |
343 | ||
344 | debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw); | |
345 | ||
346 | if (ireason == (!rw << 1)) | |
347 | return 0; | |
348 | else if (ireason == (rw << 1)) { | |
349 | printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", | |
350 | drive->name, __func__); | |
351 | ||
352 | if (dev_is_idecd(drive)) | |
353 | ide_pad_transfer(drive, rw, len); | |
354 | } else if (!rw && ireason == ATAPI_COD) { | |
355 | if (dev_is_idecd(drive)) { | |
356 | /* | |
357 | * Some drives (ASUS) seem to tell us that status info | |
358 | * is available. Just get it and ignore. | |
359 | */ | |
360 | (void)hwif->tp_ops->read_status(hwif); | |
361 | return 0; | |
362 | } | |
363 | } else { | |
364 | if (ireason & ATAPI_COD) | |
365 | printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name, | |
366 | __func__); | |
367 | ||
368 | /* drive wants a command packet, or invalid ireason... */ | |
369 | printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", | |
370 | drive->name, __func__, ireason); | |
371 | } | |
372 | ||
373 | if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC) | |
374 | rq->cmd_flags |= REQ_FAILED; | |
375 | ||
376 | return 1; | |
377 | } | |
378 | EXPORT_SYMBOL_GPL(ide_check_ireason); | |
379 | ||
aa5d2de7 BZ |
380 | /* |
381 | * This is the usual interrupt handler which will be called during a packet | |
382 | * command. We will transfer some of the data (as requested by the drive) | |
383 | * and will re-point interrupt handler to us. | |
384 | */ | |
385 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 386 | { |
2b9efba4 | 387 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 388 | ide_hwif_t *hwif = drive->hwif; |
f094d4d8 | 389 | struct ide_cmd *cmd = &hwif->cmd; |
b65fac32 | 390 | struct request *rq = hwif->rq; |
374e042c | 391 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
d93bc452 | 392 | unsigned int timeout, done; |
646c0cb6 | 393 | u16 bcount; |
5d655a03 | 394 | u8 stat, ireason, dsc = 0; |
d93bc452 | 395 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
646c0cb6 BZ |
396 | |
397 | debug_log("Enter %s - interrupt handler\n", __func__); | |
398 | ||
5d655a03 BP |
399 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
400 | : WAIT_TAPE_CMD; | |
844b9468 | 401 | |
646c0cb6 | 402 | /* Clear the interrupt */ |
374e042c | 403 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
404 | |
405 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
88b4132e | 406 | int rc; |
4453011f | 407 | |
88b4132e BZ |
408 | drive->waiting_for_dma = 0; |
409 | rc = hwif->dma_ops->dma_end(drive); | |
f094d4d8 | 410 | ide_dma_unmap_sg(drive, cmd); |
4453011f BZ |
411 | |
412 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { | |
5d655a03 | 413 | if (drive->media == ide_floppy) |
103f7033 | 414 | printk(KERN_ERR PFX "%s: DMA %s error\n", |
646c0cb6 BZ |
415 | drive->name, rq_data_dir(pc->rq) |
416 | ? "write" : "read"); | |
417 | pc->flags |= PC_FLAG_DMA_ERROR; | |
6d700387 | 418 | } else |
077e6dba | 419 | rq->resid_len = 0; |
646c0cb6 BZ |
420 | debug_log("%s: DMA finished\n", drive->name); |
421 | } | |
422 | ||
423 | /* No more interrupts */ | |
3a7d2484 | 424 | if ((stat & ATA_DRQ) == 0) { |
5b6c942d | 425 | int uptodate, error; |
03a2faae | 426 | |
646c0cb6 | 427 | debug_log("Packet command completed, %d bytes transferred\n", |
077e6dba | 428 | blk_rq_bytes(rq)); |
646c0cb6 BZ |
429 | |
430 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
431 | ||
432 | local_irq_enable_in_hardirq(); | |
433 | ||
5d655a03 | 434 | if (drive->media == ide_tape && |
3a7d2484 BZ |
435 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
436 | stat &= ~ATA_ERR; | |
8fccf899 | 437 | |
3a7d2484 | 438 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
439 | /* Error detected */ |
440 | debug_log("%s: I/O error\n", drive->name); | |
441 | ||
5d655a03 | 442 | if (drive->media != ide_tape) |
646c0cb6 | 443 | pc->rq->errors++; |
646c0cb6 | 444 | |
8fccf899 | 445 | if (rq->cmd[0] == REQUEST_SENSE) { |
103f7033 BP |
446 | printk(KERN_ERR PFX "%s: I/O error in request " |
447 | "sense command\n", drive->name); | |
646c0cb6 BZ |
448 | return ide_do_reset(drive); |
449 | } | |
450 | ||
8fccf899 | 451 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
452 | |
453 | /* Retry operation */ | |
6b544fcc | 454 | ide_retry_pc(drive); |
8fccf899 | 455 | |
646c0cb6 BZ |
456 | /* queued, but not started */ |
457 | return ide_stopped; | |
458 | } | |
646c0cb6 | 459 | pc->error = 0; |
b14c7212 BZ |
460 | |
461 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
462 | dsc = 1; | |
8fccf899 | 463 | |
b3071d19 TH |
464 | /* |
465 | * ->pc_callback() might change rq->data_len for | |
466 | * residual count, cache total length. | |
467 | */ | |
21d9c5d2 | 468 | done = blk_rq_bytes(rq); |
b3071d19 | 469 | |
646c0cb6 | 470 | /* Command finished - Call the callback function */ |
03a2faae BZ |
471 | uptodate = drive->pc_callback(drive, dsc); |
472 | ||
473 | if (uptodate == 0) | |
474 | drive->failed_pc = NULL; | |
475 | ||
6902a533 BZ |
476 | if (blk_special_request(rq)) { |
477 | rq->errors = 0; | |
5b6c942d | 478 | error = 0; |
89f78b32 | 479 | } else { |
349d12a1 | 480 | |
89f78b32 BZ |
481 | if (blk_fs_request(rq) == 0 && uptodate <= 0) { |
482 | if (rq->errors == 0) | |
483 | rq->errors = -EIO; | |
484 | } | |
349d12a1 | 485 | |
5b6c942d | 486 | error = uptodate ? 0 : -EIO; |
89f78b32 | 487 | } |
8fccf899 | 488 | |
c3a4d78c | 489 | ide_complete_rq(drive, error, blk_rq_bytes(rq)); |
646c0cb6 BZ |
490 | return ide_stopped; |
491 | } | |
492 | ||
493 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
494 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
103f7033 BP |
495 | printk(KERN_ERR PFX "%s: The device wants to issue more " |
496 | "interrupts in DMA mode\n", drive->name); | |
646c0cb6 BZ |
497 | ide_dma_off(drive); |
498 | return ide_do_reset(drive); | |
499 | } | |
646c0cb6 | 500 | |
1823649b BZ |
501 | /* Get the number of bytes to transfer on this interrupt. */ |
502 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 503 | |
103f7033 | 504 | if (ide_check_ireason(drive, rq, bcount, ireason, write)) |
646c0cb6 | 505 | return ide_do_reset(drive); |
8fccf899 | 506 | |
6d700387 TH |
507 | done = min_t(unsigned int, bcount, cmd->nleft); |
508 | ide_pio_bytes(drive, cmd, write, done); | |
646c0cb6 | 509 | |
6d700387 | 510 | /* Update transferred byte count */ |
077e6dba | 511 | rq->resid_len -= done; |
d93bc452 BZ |
512 | |
513 | bcount -= done; | |
514 | ||
515 | if (bcount) | |
516 | ide_pad_transfer(drive, write, bcount); | |
517 | ||
077e6dba BP |
518 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n", |
519 | rq->cmd[0], done, bcount, rq->resid_len); | |
646c0cb6 | 520 | |
646c0cb6 | 521 | /* And set the interrupt handler again */ |
60c0cd02 | 522 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
523 | return ide_started; |
524 | } | |
594c16d8 | 525 | |
60f85019 | 526 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
b788ee9c | 527 | u16 bcount, u8 dma) |
7a254df0 | 528 | { |
60f85019 SS |
529 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
530 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | | |
531 | IDE_VALID_FEATURE | valid_tf; | |
35b5d0be | 532 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
533 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
534 | cmd->tf.lbam = bcount & 0xff; | |
535 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
536 | } |
537 | ||
88a72109 BZ |
538 | static u8 ide_read_ireason(ide_drive_t *drive) |
539 | { | |
3153c26b | 540 | struct ide_taskfile tf; |
88a72109 | 541 | |
3153c26b | 542 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
88a72109 | 543 | |
3153c26b | 544 | return tf.nsect & 3; |
88a72109 BZ |
545 | } |
546 | ||
594c16d8 BZ |
547 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
548 | { | |
594c16d8 BZ |
549 | int retries = 100; |
550 | ||
3a7d2484 BZ |
551 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
552 | (ireason & ATAPI_IO))) { | |
103f7033 | 553 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing " |
594c16d8 BZ |
554 | "a packet command, retrying\n", drive->name); |
555 | udelay(100); | |
88a72109 | 556 | ireason = ide_read_ireason(drive); |
594c16d8 | 557 | if (retries == 0) { |
103f7033 BP |
558 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing" |
559 | " a packet command, ignoring\n", | |
594c16d8 | 560 | drive->name); |
3a7d2484 BZ |
561 | ireason |= ATAPI_COD; |
562 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
563 | } |
564 | } | |
565 | ||
566 | return ireason; | |
567 | } | |
568 | ||
baf08f0b BZ |
569 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
570 | { | |
571 | /* Send the actual packet */ | |
572 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
573 | ||
574 | /* Timeout for the packet command */ | |
575 | return WAIT_FLOPPY_CMD; | |
576 | } | |
577 | ||
578 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 579 | { |
b16aabc9 | 580 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 581 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 582 | struct request *rq = hwif->rq; |
baf08f0b BZ |
583 | ide_expiry_t *expiry; |
584 | unsigned int timeout; | |
8c662852 | 585 | int cmd_len; |
594c16d8 BZ |
586 | ide_startstop_t startstop; |
587 | u8 ireason; | |
588 | ||
3a7d2484 | 589 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
103f7033 | 590 | printk(KERN_ERR PFX "%s: Strange, packet command initiated yet " |
594c16d8 BZ |
591 | "DRQ isn't asserted\n", drive->name); |
592 | return startstop; | |
593 | } | |
594 | ||
5f25843f BP |
595 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
596 | if (drive->dma) | |
597 | drive->waiting_for_dma = 1; | |
598 | } | |
599 | ||
8c662852 BP |
600 | if (dev_is_idecd(drive)) { |
601 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
602 | cmd_len = COMMAND_SIZE(rq->cmd[0]); | |
603 | if (cmd_len < ATAPI_MIN_CDB_BYTES) | |
604 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 605 | |
def860d0 BP |
606 | timeout = rq->timeout; |
607 | expiry = ide_cd_expiry; | |
baf08f0b | 608 | } else { |
b16aabc9 BP |
609 | pc = drive->pc; |
610 | ||
def860d0 BP |
611 | cmd_len = ATAPI_MIN_CDB_BYTES; |
612 | ||
613 | /* | |
614 | * If necessary schedule the packet transfer to occur 'timeout' | |
19af5cdb | 615 | * milliseconds later in ide_delayed_transfer_pc() after the |
def860d0 BP |
616 | * device says it's ready for a packet. |
617 | */ | |
618 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
619 | timeout = drive->pc_delay; | |
620 | expiry = &ide_delayed_transfer_pc; | |
621 | } else { | |
622 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
623 | : WAIT_TAPE_CMD; | |
624 | expiry = NULL; | |
625 | } | |
06cc2778 BP |
626 | |
627 | ireason = ide_read_ireason(drive); | |
628 | if (drive->media == ide_tape) | |
629 | ireason = ide_wait_ireason(drive, ireason); | |
630 | ||
631 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
103f7033 BP |
632 | printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while " |
633 | "issuing a packet command\n", drive->name); | |
06cc2778 BP |
634 | |
635 | return ide_do_reset(drive); | |
636 | } | |
baf08f0b BZ |
637 | } |
638 | ||
60c0cd02 BZ |
639 | hwif->expiry = expiry; |
640 | ||
594c16d8 | 641 | /* Set the interrupt routine */ |
d6251d44 BP |
642 | ide_set_handler(drive, |
643 | (dev_is_idecd(drive) ? drive->irq_handler | |
644 | : ide_pc_intr), | |
60c0cd02 | 645 | timeout); |
594c16d8 | 646 | |
2eba0827 BP |
647 | /* Send the actual packet */ |
648 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
649 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); | |
650 | ||
594c16d8 | 651 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
652 | if (dev_is_idecd(drive)) { |
653 | if (drive->dma) | |
654 | hwif->dma_ops->dma_start(drive); | |
655 | } else { | |
656 | if (pc->flags & PC_FLAG_DMA_OK) { | |
657 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
658 | hwif->dma_ops->dma_start(drive); | |
659 | } | |
594c16d8 BZ |
660 | } |
661 | ||
594c16d8 BZ |
662 | return ide_started; |
663 | } | |
6bf1641c | 664 | |
b788ee9c | 665 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 666 | { |
d77612ab | 667 | struct ide_atapi_pc *pc; |
6bf1641c | 668 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 669 | ide_expiry_t *expiry = NULL; |
e6830a86 | 670 | struct request *rq = hwif->rq; |
dfb7e621 | 671 | unsigned int timeout, bytes; |
392de1d5 | 672 | u16 bcount; |
60f85019 | 673 | u8 valid_tf; |
35b5d0be | 674 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 675 | |
ed48554f | 676 | if (dev_is_idecd(drive)) { |
60f85019 | 677 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
e6830a86 | 678 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 679 | expiry = ide_cd_expiry; |
28ad91db | 680 | timeout = ATAPI_WAIT_PC; |
d77612ab | 681 | |
5ae5412d BZ |
682 | if (drive->dma) |
683 | drive->dma = !ide_dma_prepare(drive, cmd); | |
ed48554f | 684 | } else { |
d77612ab BP |
685 | pc = drive->pc; |
686 | ||
60f85019 | 687 | valid_tf = IDE_VALID_DEVICE; |
dfb7e621 | 688 | bytes = blk_rq_bytes(rq); |
dfb7e621 BP |
689 | bcount = ((drive->media == ide_tape) ? bytes |
690 | : min_t(unsigned int, | |
691 | bytes, 63 * 1024)); | |
6bf1641c | 692 | |
077e6dba BP |
693 | /* We haven't transferred any data yet */ |
694 | rq->resid_len = bcount; | |
6bf1641c | 695 | |
d77612ab BP |
696 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
697 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
698 | ide_dma_off(drive); | |
699 | } | |
6bf1641c | 700 | |
5ae5412d BZ |
701 | if (pc->flags & PC_FLAG_DMA_OK) |
702 | drive->dma = !ide_dma_prepare(drive, cmd); | |
6bf1641c | 703 | |
d77612ab BP |
704 | if (!drive->dma) |
705 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
706 | |
707 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
708 | : WAIT_TAPE_CMD; | |
d77612ab | 709 | } |
6bf1641c | 710 | |
60f85019 | 711 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
b788ee9c BZ |
712 | |
713 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 714 | |
35b5d0be | 715 | if (drq_int) { |
5f25843f BP |
716 | if (drive->dma) |
717 | drive->waiting_for_dma = 0; | |
22117d6e | 718 | hwif->expiry = expiry; |
6bf1641c | 719 | } |
35b5d0be BZ |
720 | |
721 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
722 | ||
723 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
724 | } |
725 | EXPORT_SYMBOL_GPL(ide_issue_pc); |