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> | |
646c0cb6 BZ |
9 | #include <scsi/scsi.h> |
10 | ||
11 | #ifdef DEBUG | |
12 | #define debug_log(fmt, args...) \ | |
13 | printk(KERN_INFO "ide: " fmt, ## args) | |
14 | #else | |
15 | #define debug_log(fmt, args...) do {} while (0) | |
16 | #endif | |
17 | ||
8c662852 BP |
18 | #define ATAPI_MIN_CDB_BYTES 12 |
19 | ||
991cb26a BP |
20 | static inline int dev_is_idecd(ide_drive_t *drive) |
21 | { | |
5317464d | 22 | return drive->media == ide_cdrom || drive->media == ide_optical; |
991cb26a BP |
23 | } |
24 | ||
51509eec BZ |
25 | /* |
26 | * Check whether we can support a device, | |
27 | * based on the ATAPI IDENTIFY command results. | |
28 | */ | |
29 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
30 | { | |
31 | u16 *id = drive->id; | |
32 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
33 | ||
34 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
35 | ||
36 | protocol = (gcw[1] & 0xC0) >> 6; | |
37 | device_type = gcw[1] & 0x1F; | |
38 | removable = (gcw[0] & 0x80) >> 7; | |
39 | drq_type = (gcw[0] & 0x60) >> 5; | |
40 | packet_size = gcw[0] & 0x03; | |
41 | ||
42 | #ifdef CONFIG_PPC | |
43 | /* kludge for Apple PowerBook internal zip */ | |
44 | if (drive->media == ide_floppy && device_type == 5 && | |
45 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
46 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
47 | device_type = 0; | |
48 | #endif | |
49 | ||
50 | if (protocol != 2) | |
51 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
52 | s, drive->name, protocol); | |
53 | else if ((drive->media == ide_floppy && device_type != 0) || | |
54 | (drive->media == ide_tape && device_type != 1)) | |
55 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
56 | s, drive->name, device_type); | |
57 | else if (removable == 0) | |
58 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
59 | s, drive->name); | |
60 | else if (drive->media == ide_floppy && drq_type == 3) | |
61 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
62 | "supported\n", s, drive->name, drq_type); | |
63 | else if (packet_size != 0) | |
64 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
65 | "bytes\n", s, drive->name, packet_size); | |
66 | else | |
67 | return 1; | |
68 | return 0; | |
69 | } | |
70 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
71 | ||
acaa0f5f BZ |
72 | /* PIO data transfer routine using the scatter gather table. */ |
73 | int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
74 | unsigned int bcount, int write) | |
75 | { | |
76 | ide_hwif_t *hwif = drive->hwif; | |
77 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
78 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
79 | struct scatterlist *sg = pc->sg; | |
80 | char *buf; | |
81 | int count, done = 0; | |
82 | ||
83 | while (bcount) { | |
84 | count = min(sg->length - pc->b_count, bcount); | |
85 | ||
86 | if (PageHighMem(sg_page(sg))) { | |
87 | unsigned long flags; | |
88 | ||
89 | local_irq_save(flags); | |
90 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; | |
91 | xf(drive, NULL, buf + pc->b_count, count); | |
92 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
93 | local_irq_restore(flags); | |
94 | } else { | |
95 | buf = sg_virt(sg); | |
96 | xf(drive, NULL, buf + pc->b_count, count); | |
97 | } | |
98 | ||
99 | bcount -= count; | |
100 | pc->b_count += count; | |
101 | done += count; | |
102 | ||
103 | if (pc->b_count == sg->length) { | |
104 | if (!--pc->sg_cnt) | |
105 | break; | |
106 | pc->sg = sg = sg_next(sg); | |
107 | pc->b_count = 0; | |
108 | } | |
109 | } | |
110 | ||
111 | if (bcount) { | |
112 | printk(KERN_ERR "%s: %d leftover bytes, %s\n", drive->name, | |
113 | bcount, write ? "padding with zeros" | |
114 | : "discarding data"); | |
115 | ide_pad_transfer(drive, write, bcount); | |
116 | } | |
117 | ||
118 | return done; | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(ide_io_buffers); | |
121 | ||
7bf7420a BZ |
122 | void ide_init_pc(struct ide_atapi_pc *pc) |
123 | { | |
124 | memset(pc, 0, sizeof(*pc)); | |
125 | pc->buf = pc->pc_buf; | |
126 | pc->buf_size = IDE_PC_BUFFER_SIZE; | |
127 | } | |
128 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
129 | ||
7645c151 BZ |
130 | /* |
131 | * Generate a new packet command request in front of the request queue, before | |
132 | * the current request, so that it will be processed immediately, on the next | |
133 | * pass through the driver. | |
134 | */ | |
6b0da28b BZ |
135 | static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, |
136 | struct ide_atapi_pc *pc, struct request *rq) | |
7645c151 BZ |
137 | { |
138 | blk_rq_init(NULL, rq); | |
139 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
140 | rq->cmd_flags |= REQ_PREEMPT; | |
141 | rq->buffer = (char *)pc; | |
142 | rq->rq_disk = disk; | |
3eb76c1c BP |
143 | |
144 | if (pc->req_xfer) { | |
145 | rq->data = pc->buf; | |
146 | rq->data_len = pc->req_xfer; | |
147 | } | |
148 | ||
7645c151 BZ |
149 | memcpy(rq->cmd, pc->c, 12); |
150 | if (drive->media == ide_tape) | |
151 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
18660823 BZ |
152 | |
153 | drive->hwif->rq = NULL; | |
154 | ||
155 | elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); | |
7645c151 | 156 | } |
7645c151 | 157 | |
2ac07d92 BZ |
158 | /* |
159 | * Add a special packet command request to the tail of the request queue, | |
160 | * and wait for it to be serviced. | |
161 | */ | |
162 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
163 | struct ide_atapi_pc *pc) | |
164 | { | |
165 | struct request *rq; | |
166 | int error; | |
167 | ||
168 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
169 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
170 | rq->buffer = (char *)pc; | |
3eb76c1c BP |
171 | |
172 | if (pc->req_xfer) { | |
173 | rq->data = pc->buf; | |
174 | rq->data_len = pc->req_xfer; | |
175 | } | |
176 | ||
2ac07d92 BZ |
177 | memcpy(rq->cmd, pc->c, 12); |
178 | if (drive->media == ide_tape) | |
179 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
180 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
181 | blk_put_request(rq); | |
182 | ||
183 | return error; | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
186 | ||
de699ad5 BZ |
187 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
188 | { | |
189 | struct ide_atapi_pc pc; | |
190 | ||
191 | ide_init_pc(&pc); | |
192 | pc.c[0] = TEST_UNIT_READY; | |
193 | ||
194 | return ide_queue_pc_tail(drive, disk, &pc); | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
197 | ||
0c8a6c7a BZ |
198 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
199 | { | |
200 | struct ide_atapi_pc pc; | |
201 | ||
202 | ide_init_pc(&pc); | |
203 | pc.c[0] = START_STOP; | |
204 | pc.c[4] = start; | |
205 | ||
206 | if (drive->media == ide_tape) | |
207 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
208 | ||
209 | return ide_queue_pc_tail(drive, disk, &pc); | |
210 | } | |
211 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
212 | ||
0578042d BZ |
213 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
214 | { | |
215 | struct ide_atapi_pc pc; | |
216 | ||
42619d35 | 217 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
218 | return 0; |
219 | ||
220 | ide_init_pc(&pc); | |
221 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
222 | pc.c[4] = on; | |
223 | ||
224 | return ide_queue_pc_tail(drive, disk, &pc); | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
227 | ||
6b0da28b BZ |
228 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
229 | { | |
230 | ide_init_pc(pc); | |
231 | pc->c[0] = REQUEST_SENSE; | |
232 | if (drive->media == ide_floppy) { | |
233 | pc->c[4] = 255; | |
234 | pc->req_xfer = 18; | |
235 | } else { | |
236 | pc->c[4] = 20; | |
237 | pc->req_xfer = 20; | |
238 | } | |
239 | } | |
240 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
241 | ||
242 | /* | |
243 | * Called when an error was detected during the last packet command. | |
244 | * We queue a request sense packet command in the head of the request list. | |
245 | */ | |
246 | void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk) | |
247 | { | |
248 | struct request *rq = &drive->request_sense_rq; | |
249 | struct ide_atapi_pc *pc = &drive->request_sense_pc; | |
250 | ||
251 | (void)ide_read_error(drive); | |
252 | ide_create_request_sense_cmd(drive, pc); | |
253 | if (drive->media == ide_tape) | |
254 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); | |
255 | ide_queue_pc_head(drive, disk, pc, rq); | |
256 | } | |
257 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
258 | ||
4cad085e BP |
259 | int ide_cd_expiry(ide_drive_t *drive) |
260 | { | |
b65fac32 | 261 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
262 | unsigned long wait = 0; |
263 | ||
264 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
265 | ||
266 | /* | |
267 | * Some commands are *slow* and normally take a long time to complete. | |
268 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
269 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
270 | * for these. | |
271 | */ | |
272 | switch (rq->cmd[0]) { | |
273 | case GPCMD_BLANK: | |
274 | case GPCMD_FORMAT_UNIT: | |
275 | case GPCMD_RESERVE_RZONE_TRACK: | |
276 | case GPCMD_CLOSE_TRACK: | |
277 | case GPCMD_FLUSH_CACHE: | |
278 | wait = ATAPI_WAIT_PC; | |
279 | break; | |
280 | default: | |
281 | if (!(rq->cmd_flags & REQ_QUIET)) | |
282 | printk(KERN_INFO "cmd 0x%x timed out\n", | |
283 | rq->cmd[0]); | |
284 | wait = 0; | |
285 | break; | |
286 | } | |
287 | return wait; | |
288 | } | |
289 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
290 | ||
392de1d5 BP |
291 | int ide_cd_get_xferlen(struct request *rq) |
292 | { | |
293 | if (blk_fs_request(rq)) | |
294 | return 32768; | |
295 | else if (blk_sense_request(rq) || blk_pc_request(rq) || | |
296 | rq->cmd_type == REQ_TYPE_ATA_PC) | |
297 | return rq->data_len; | |
298 | else | |
299 | return 0; | |
300 | } | |
301 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
302 | ||
0d6a9754 BZ |
303 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
304 | { | |
305 | ide_task_t task; | |
306 | ||
307 | memset(&task, 0, sizeof(task)); | |
308 | task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | | |
309 | IDE_TFLAG_IN_NSECT; | |
310 | ||
311 | drive->hwif->tp_ops->tf_read(drive, &task); | |
312 | ||
313 | *bcount = (task.tf.lbah << 8) | task.tf.lbam; | |
314 | *ireason = task.tf.nsect & 3; | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
317 | ||
aa5d2de7 BZ |
318 | /* |
319 | * This is the usual interrupt handler which will be called during a packet | |
320 | * command. We will transfer some of the data (as requested by the drive) | |
321 | * and will re-point interrupt handler to us. | |
322 | */ | |
323 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 324 | { |
2b9efba4 | 325 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 326 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 327 | struct request *rq = hwif->rq; |
374e042c | 328 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 | 329 | xfer_func_t *xferfunc; |
844b9468 | 330 | unsigned int timeout, temp; |
646c0cb6 | 331 | u16 bcount; |
5d655a03 | 332 | u8 stat, ireason, dsc = 0; |
646c0cb6 BZ |
333 | |
334 | debug_log("Enter %s - interrupt handler\n", __func__); | |
335 | ||
5d655a03 BP |
336 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
337 | : WAIT_TAPE_CMD; | |
844b9468 | 338 | |
646c0cb6 | 339 | /* Clear the interrupt */ |
374e042c | 340 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
341 | |
342 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
343 | if (hwif->dma_ops->dma_end(drive) || | |
5d655a03 BP |
344 | (drive->media == ide_tape && (stat & ATA_ERR))) { |
345 | if (drive->media == ide_floppy) | |
646c0cb6 BZ |
346 | printk(KERN_ERR "%s: DMA %s error\n", |
347 | drive->name, rq_data_dir(pc->rq) | |
348 | ? "write" : "read"); | |
349 | pc->flags |= PC_FLAG_DMA_ERROR; | |
350 | } else { | |
351 | pc->xferred = pc->req_xfer; | |
85e39035 BZ |
352 | if (drive->pc_update_buffers) |
353 | drive->pc_update_buffers(drive, pc); | |
646c0cb6 BZ |
354 | } |
355 | debug_log("%s: DMA finished\n", drive->name); | |
356 | } | |
357 | ||
358 | /* No more interrupts */ | |
3a7d2484 | 359 | if ((stat & ATA_DRQ) == 0) { |
646c0cb6 BZ |
360 | debug_log("Packet command completed, %d bytes transferred\n", |
361 | pc->xferred); | |
362 | ||
363 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
364 | ||
365 | local_irq_enable_in_hardirq(); | |
366 | ||
5d655a03 | 367 | if (drive->media == ide_tape && |
3a7d2484 BZ |
368 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
369 | stat &= ~ATA_ERR; | |
8fccf899 | 370 | |
3a7d2484 | 371 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
372 | /* Error detected */ |
373 | debug_log("%s: I/O error\n", drive->name); | |
374 | ||
5d655a03 | 375 | if (drive->media != ide_tape) |
646c0cb6 | 376 | pc->rq->errors++; |
646c0cb6 | 377 | |
8fccf899 | 378 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
379 | printk(KERN_ERR "%s: I/O error in request sense" |
380 | " command\n", drive->name); | |
381 | return ide_do_reset(drive); | |
382 | } | |
383 | ||
8fccf899 | 384 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
385 | |
386 | /* Retry operation */ | |
6b0da28b | 387 | ide_retry_pc(drive, rq->rq_disk); |
8fccf899 | 388 | |
646c0cb6 BZ |
389 | /* queued, but not started */ |
390 | return ide_stopped; | |
391 | } | |
646c0cb6 | 392 | pc->error = 0; |
b14c7212 BZ |
393 | |
394 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
395 | dsc = 1; | |
8fccf899 | 396 | |
646c0cb6 | 397 | /* Command finished - Call the callback function */ |
b14c7212 | 398 | drive->pc_callback(drive, dsc); |
8fccf899 | 399 | |
646c0cb6 BZ |
400 | return ide_stopped; |
401 | } | |
402 | ||
403 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
404 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
405 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
406 | "in DMA mode\n", drive->name); | |
407 | ide_dma_off(drive); | |
408 | return ide_do_reset(drive); | |
409 | } | |
646c0cb6 | 410 | |
1823649b BZ |
411 | /* Get the number of bytes to transfer on this interrupt. */ |
412 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 413 | |
3a7d2484 | 414 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
415 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
416 | return ide_do_reset(drive); | |
417 | } | |
8fccf899 | 418 | |
3a7d2484 BZ |
419 | if (((ireason & ATAPI_IO) == ATAPI_IO) == |
420 | !!(pc->flags & PC_FLAG_WRITING)) { | |
646c0cb6 BZ |
421 | /* Hopefully, we will never get here */ |
422 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
423 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
424 | (ireason & ATAPI_IO) ? "Write" : "Read", |
425 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
426 | return ide_do_reset(drive); |
427 | } | |
8fccf899 | 428 | |
646c0cb6 BZ |
429 | if (!(pc->flags & PC_FLAG_WRITING)) { |
430 | /* Reading - Check that we have enough space */ | |
431 | temp = pc->xferred + bcount; | |
432 | if (temp > pc->req_xfer) { | |
433 | if (temp > pc->buf_size) { | |
434 | printk(KERN_ERR "%s: The device wants to send " | |
435 | "us more data than expected - " | |
436 | "discarding data\n", | |
437 | drive->name); | |
5d655a03 BP |
438 | |
439 | ide_pad_transfer(drive, 0, bcount); | |
844b9468 | 440 | goto next_irq; |
646c0cb6 BZ |
441 | } |
442 | debug_log("The device wants to send us more data than " | |
443 | "expected - allowing transfer\n"); | |
444 | } | |
374e042c | 445 | xferfunc = tp_ops->input_data; |
646c0cb6 | 446 | } else |
374e042c | 447 | xferfunc = tp_ops->output_data; |
646c0cb6 | 448 | |
5d655a03 BP |
449 | if ((drive->media == ide_floppy && !pc->buf) || |
450 | (drive->media == ide_tape && pc->bh)) { | |
85e39035 | 451 | int done = drive->pc_io_buffers(drive, pc, bcount, |
acaa0f5f BZ |
452 | !!(pc->flags & PC_FLAG_WRITING)); |
453 | ||
454 | /* FIXME: don't do partial completions */ | |
5d655a03 | 455 | if (drive->media == ide_floppy) |
acaa0f5f BZ |
456 | ide_end_request(drive, 1, done >> 9); |
457 | } else | |
646c0cb6 BZ |
458 | xferfunc(drive, NULL, pc->cur_pos, bcount); |
459 | ||
460 | /* Update the current position */ | |
461 | pc->xferred += bcount; | |
462 | pc->cur_pos += bcount; | |
463 | ||
464 | debug_log("[cmd %x] transferred %d bytes on that intr.\n", | |
8fccf899 | 465 | rq->cmd[0], bcount); |
844b9468 | 466 | next_irq: |
646c0cb6 | 467 | /* And set the interrupt handler again */ |
5d655a03 | 468 | ide_set_handler(drive, ide_pc_intr, timeout, NULL); |
646c0cb6 BZ |
469 | return ide_started; |
470 | } | |
594c16d8 | 471 | |
7a254df0 BZ |
472 | static void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount) |
473 | { | |
474 | ide_hwif_t *hwif = drive->hwif; | |
475 | ide_task_t task; | |
476 | u8 dma = drive->dma; | |
477 | ||
478 | memset(&task, 0, sizeof(task)); | |
479 | task.tf_flags = IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM | | |
480 | IDE_TFLAG_OUT_FEATURE | tf_flags; | |
481 | task.tf.feature = dma; /* Use PIO/DMA */ | |
482 | task.tf.lbam = bcount & 0xff; | |
483 | task.tf.lbah = (bcount >> 8) & 0xff; | |
484 | ||
485 | ide_tf_dump(drive->name, &task.tf); | |
486 | hwif->tp_ops->set_irq(hwif, 1); | |
487 | SELECT_MASK(drive, 0); | |
488 | hwif->tp_ops->tf_load(drive, &task); | |
489 | } | |
490 | ||
88a72109 BZ |
491 | static u8 ide_read_ireason(ide_drive_t *drive) |
492 | { | |
493 | ide_task_t task; | |
494 | ||
495 | memset(&task, 0, sizeof(task)); | |
496 | task.tf_flags = IDE_TFLAG_IN_NSECT; | |
497 | ||
374e042c | 498 | drive->hwif->tp_ops->tf_read(drive, &task); |
88a72109 BZ |
499 | |
500 | return task.tf.nsect & 3; | |
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 | ||
594c16d8 | 595 | /* Set the interrupt routine */ |
d6251d44 BP |
596 | ide_set_handler(drive, |
597 | (dev_is_idecd(drive) ? drive->irq_handler | |
598 | : ide_pc_intr), | |
599 | timeout, expiry); | |
594c16d8 BZ |
600 | |
601 | /* Begin DMA, if necessary */ | |
b16aabc9 BP |
602 | if (dev_is_idecd(drive)) { |
603 | if (drive->dma) | |
604 | hwif->dma_ops->dma_start(drive); | |
605 | } else { | |
606 | if (pc->flags & PC_FLAG_DMA_OK) { | |
607 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
608 | hwif->dma_ops->dma_start(drive); | |
609 | } | |
594c16d8 BZ |
610 | } |
611 | ||
612 | /* Send the actual packet */ | |
ea68d270 | 613 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) |
8c662852 | 614 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); |
594c16d8 BZ |
615 | |
616 | return ide_started; | |
617 | } | |
6bf1641c | 618 | |
28ad91db | 619 | ide_startstop_t ide_issue_pc(ide_drive_t *drive) |
6bf1641c | 620 | { |
d77612ab | 621 | struct ide_atapi_pc *pc; |
6bf1641c | 622 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 623 | ide_expiry_t *expiry = NULL; |
28ad91db | 624 | unsigned int timeout; |
f9476b96 | 625 | u32 tf_flags; |
392de1d5 | 626 | u16 bcount; |
6bf1641c | 627 | |
ed48554f BP |
628 | if (dev_is_idecd(drive)) { |
629 | tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL; | |
b65fac32 | 630 | bcount = ide_cd_get_xferlen(hwif->rq); |
4cad085e | 631 | expiry = ide_cd_expiry; |
28ad91db | 632 | timeout = ATAPI_WAIT_PC; |
d77612ab BP |
633 | |
634 | if (drive->dma) | |
635 | drive->dma = !hwif->dma_ops->dma_setup(drive); | |
ed48554f | 636 | } else { |
d77612ab BP |
637 | pc = drive->pc; |
638 | ||
639 | /* We haven't transferred any data yet */ | |
640 | pc->xferred = 0; | |
641 | pc->cur_pos = pc->buf; | |
642 | ||
ed48554f BP |
643 | tf_flags = IDE_TFLAG_OUT_DEVICE; |
644 | bcount = ((drive->media == ide_tape) ? | |
645 | pc->req_xfer : | |
646 | min(pc->req_xfer, 63 * 1024)); | |
6bf1641c | 647 | |
d77612ab BP |
648 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
649 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
650 | ide_dma_off(drive); | |
651 | } | |
6bf1641c | 652 | |
d77612ab BP |
653 | if ((pc->flags & PC_FLAG_DMA_OK) && |
654 | (drive->dev_flags & IDE_DFLAG_USING_DMA)) | |
655 | drive->dma = !hwif->dma_ops->dma_setup(drive); | |
6bf1641c | 656 | |
d77612ab BP |
657 | if (!drive->dma) |
658 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
659 | |
660 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
661 | : WAIT_TAPE_CMD; | |
d77612ab | 662 | } |
6bf1641c | 663 | |
7a254df0 | 664 | ide_pktcmd_tf_load(drive, tf_flags, bcount); |
6bf1641c BZ |
665 | |
666 | /* Issue the packet command */ | |
ac77ef8b | 667 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
5f25843f BP |
668 | if (drive->dma) |
669 | drive->waiting_for_dma = 0; | |
baf08f0b | 670 | ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc, |
4cad085e | 671 | timeout, expiry); |
6bf1641c BZ |
672 | return ide_started; |
673 | } else { | |
674 | ide_execute_pkt_cmd(drive); | |
baf08f0b | 675 | return ide_transfer_pc(drive); |
6bf1641c BZ |
676 | } |
677 | } | |
678 | EXPORT_SYMBOL_GPL(ide_issue_pc); |