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 | ||
7645c151 BZ |
82 | /* |
83 | * Generate a new packet command request in front of the request queue, before | |
84 | * the current request, so that it will be processed immediately, on the next | |
85 | * pass through the driver. | |
86 | */ | |
6b0da28b BZ |
87 | static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, |
88 | struct ide_atapi_pc *pc, struct request *rq) | |
7645c151 BZ |
89 | { |
90 | blk_rq_init(NULL, rq); | |
91 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
92 | rq->cmd_flags |= REQ_PREEMPT; | |
93 | rq->buffer = (char *)pc; | |
94 | rq->rq_disk = disk; | |
3eb76c1c BP |
95 | |
96 | if (pc->req_xfer) { | |
97 | rq->data = pc->buf; | |
98 | rq->data_len = pc->req_xfer; | |
99 | } | |
100 | ||
7645c151 BZ |
101 | memcpy(rq->cmd, pc->c, 12); |
102 | if (drive->media == ide_tape) | |
103 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
18660823 BZ |
104 | |
105 | drive->hwif->rq = NULL; | |
106 | ||
107 | elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); | |
7645c151 | 108 | } |
7645c151 | 109 | |
2ac07d92 BZ |
110 | /* |
111 | * Add a special packet command request to the tail of the request queue, | |
112 | * and wait for it to be serviced. | |
113 | */ | |
114 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
115 | struct ide_atapi_pc *pc) | |
116 | { | |
117 | struct request *rq; | |
118 | int error; | |
119 | ||
120 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
121 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
122 | rq->buffer = (char *)pc; | |
3eb76c1c BP |
123 | |
124 | if (pc->req_xfer) { | |
125 | rq->data = pc->buf; | |
126 | rq->data_len = pc->req_xfer; | |
127 | } | |
128 | ||
2ac07d92 BZ |
129 | memcpy(rq->cmd, pc->c, 12); |
130 | if (drive->media == ide_tape) | |
131 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
132 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
133 | blk_put_request(rq); | |
134 | ||
135 | return error; | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
138 | ||
de699ad5 BZ |
139 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
140 | { | |
141 | struct ide_atapi_pc pc; | |
142 | ||
143 | ide_init_pc(&pc); | |
144 | pc.c[0] = TEST_UNIT_READY; | |
145 | ||
146 | return ide_queue_pc_tail(drive, disk, &pc); | |
147 | } | |
148 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
149 | ||
0c8a6c7a BZ |
150 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
151 | { | |
152 | struct ide_atapi_pc pc; | |
153 | ||
154 | ide_init_pc(&pc); | |
155 | pc.c[0] = START_STOP; | |
156 | pc.c[4] = start; | |
157 | ||
158 | if (drive->media == ide_tape) | |
159 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
160 | ||
161 | return ide_queue_pc_tail(drive, disk, &pc); | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
164 | ||
0578042d BZ |
165 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
166 | { | |
167 | struct ide_atapi_pc pc; | |
168 | ||
42619d35 | 169 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
170 | return 0; |
171 | ||
172 | ide_init_pc(&pc); | |
173 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
174 | pc.c[4] = on; | |
175 | ||
176 | return ide_queue_pc_tail(drive, disk, &pc); | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
179 | ||
6b0da28b BZ |
180 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
181 | { | |
182 | ide_init_pc(pc); | |
183 | pc->c[0] = REQUEST_SENSE; | |
184 | if (drive->media == ide_floppy) { | |
185 | pc->c[4] = 255; | |
186 | pc->req_xfer = 18; | |
187 | } else { | |
188 | pc->c[4] = 20; | |
189 | pc->req_xfer = 20; | |
190 | } | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
193 | ||
194 | /* | |
195 | * Called when an error was detected during the last packet command. | |
196 | * We queue a request sense packet command in the head of the request list. | |
197 | */ | |
198 | void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk) | |
199 | { | |
200 | struct request *rq = &drive->request_sense_rq; | |
201 | struct ide_atapi_pc *pc = &drive->request_sense_pc; | |
202 | ||
203 | (void)ide_read_error(drive); | |
204 | ide_create_request_sense_cmd(drive, pc); | |
205 | if (drive->media == ide_tape) | |
206 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); | |
207 | ide_queue_pc_head(drive, disk, pc, rq); | |
208 | } | |
209 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
210 | ||
4cad085e BP |
211 | int ide_cd_expiry(ide_drive_t *drive) |
212 | { | |
b65fac32 | 213 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
214 | unsigned long wait = 0; |
215 | ||
216 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
217 | ||
218 | /* | |
219 | * Some commands are *slow* and normally take a long time to complete. | |
220 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
221 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
222 | * for these. | |
223 | */ | |
224 | switch (rq->cmd[0]) { | |
225 | case GPCMD_BLANK: | |
226 | case GPCMD_FORMAT_UNIT: | |
227 | case GPCMD_RESERVE_RZONE_TRACK: | |
228 | case GPCMD_CLOSE_TRACK: | |
229 | case GPCMD_FLUSH_CACHE: | |
230 | wait = ATAPI_WAIT_PC; | |
231 | break; | |
232 | default: | |
233 | if (!(rq->cmd_flags & REQ_QUIET)) | |
234 | printk(KERN_INFO "cmd 0x%x timed out\n", | |
235 | rq->cmd[0]); | |
236 | wait = 0; | |
237 | break; | |
238 | } | |
239 | return wait; | |
240 | } | |
241 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
242 | ||
392de1d5 BP |
243 | int ide_cd_get_xferlen(struct request *rq) |
244 | { | |
245 | if (blk_fs_request(rq)) | |
246 | return 32768; | |
247 | else if (blk_sense_request(rq) || blk_pc_request(rq) || | |
248 | rq->cmd_type == REQ_TYPE_ATA_PC) | |
249 | return rq->data_len; | |
250 | else | |
251 | return 0; | |
252 | } | |
253 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
254 | ||
0d6a9754 BZ |
255 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
256 | { | |
3153c26b | 257 | struct ide_taskfile tf; |
0d6a9754 | 258 | |
3153c26b SS |
259 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
260 | IDE_VALID_LBAM | IDE_VALID_LBAH); | |
0d6a9754 | 261 | |
3153c26b SS |
262 | *bcount = (tf.lbah << 8) | tf.lbam; |
263 | *ireason = tf.nsect & 3; | |
0d6a9754 BZ |
264 | } |
265 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
266 | ||
aa5d2de7 BZ |
267 | /* |
268 | * This is the usual interrupt handler which will be called during a packet | |
269 | * command. We will transfer some of the data (as requested by the drive) | |
270 | * and will re-point interrupt handler to us. | |
271 | */ | |
272 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 273 | { |
2b9efba4 | 274 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 275 | ide_hwif_t *hwif = drive->hwif; |
f094d4d8 | 276 | struct ide_cmd *cmd = &hwif->cmd; |
b65fac32 | 277 | struct request *rq = hwif->rq; |
374e042c | 278 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 | 279 | xfer_func_t *xferfunc; |
d93bc452 | 280 | unsigned int timeout, done; |
646c0cb6 | 281 | u16 bcount; |
5d655a03 | 282 | u8 stat, ireason, dsc = 0; |
d93bc452 | 283 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
646c0cb6 BZ |
284 | |
285 | debug_log("Enter %s - interrupt handler\n", __func__); | |
286 | ||
5d655a03 BP |
287 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
288 | : WAIT_TAPE_CMD; | |
844b9468 | 289 | |
646c0cb6 | 290 | /* Clear the interrupt */ |
374e042c | 291 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
292 | |
293 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
88b4132e | 294 | int rc; |
4453011f | 295 | |
88b4132e BZ |
296 | drive->waiting_for_dma = 0; |
297 | rc = hwif->dma_ops->dma_end(drive); | |
f094d4d8 | 298 | ide_dma_unmap_sg(drive, cmd); |
4453011f BZ |
299 | |
300 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { | |
5d655a03 | 301 | if (drive->media == ide_floppy) |
646c0cb6 BZ |
302 | printk(KERN_ERR "%s: DMA %s error\n", |
303 | drive->name, rq_data_dir(pc->rq) | |
304 | ? "write" : "read"); | |
305 | pc->flags |= PC_FLAG_DMA_ERROR; | |
306 | } else { | |
307 | pc->xferred = pc->req_xfer; | |
85e39035 BZ |
308 | if (drive->pc_update_buffers) |
309 | drive->pc_update_buffers(drive, pc); | |
646c0cb6 BZ |
310 | } |
311 | debug_log("%s: DMA finished\n", drive->name); | |
312 | } | |
313 | ||
314 | /* No more interrupts */ | |
3a7d2484 | 315 | if ((stat & ATA_DRQ) == 0) { |
5b6c942d BP |
316 | int uptodate, error; |
317 | unsigned int done; | |
03a2faae | 318 | |
646c0cb6 BZ |
319 | debug_log("Packet command completed, %d bytes transferred\n", |
320 | pc->xferred); | |
321 | ||
322 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
323 | ||
324 | local_irq_enable_in_hardirq(); | |
325 | ||
5d655a03 | 326 | if (drive->media == ide_tape && |
3a7d2484 BZ |
327 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
328 | stat &= ~ATA_ERR; | |
8fccf899 | 329 | |
3a7d2484 | 330 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
331 | /* Error detected */ |
332 | debug_log("%s: I/O error\n", drive->name); | |
333 | ||
5d655a03 | 334 | if (drive->media != ide_tape) |
646c0cb6 | 335 | pc->rq->errors++; |
646c0cb6 | 336 | |
8fccf899 | 337 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
338 | printk(KERN_ERR "%s: I/O error in request sense" |
339 | " command\n", drive->name); | |
340 | return ide_do_reset(drive); | |
341 | } | |
342 | ||
8fccf899 | 343 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
344 | |
345 | /* Retry operation */ | |
6b0da28b | 346 | ide_retry_pc(drive, rq->rq_disk); |
8fccf899 | 347 | |
646c0cb6 BZ |
348 | /* queued, but not started */ |
349 | return ide_stopped; | |
350 | } | |
646c0cb6 | 351 | pc->error = 0; |
b14c7212 BZ |
352 | |
353 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
354 | dsc = 1; | |
8fccf899 | 355 | |
646c0cb6 | 356 | /* Command finished - Call the callback function */ |
03a2faae BZ |
357 | uptodate = drive->pc_callback(drive, dsc); |
358 | ||
359 | if (uptodate == 0) | |
360 | drive->failed_pc = NULL; | |
361 | ||
6902a533 BZ |
362 | if (blk_special_request(rq)) { |
363 | rq->errors = 0; | |
5b6c942d BP |
364 | done = blk_rq_bytes(rq); |
365 | error = 0; | |
89f78b32 | 366 | } else { |
349d12a1 | 367 | |
89f78b32 BZ |
368 | if (blk_fs_request(rq) == 0 && uptodate <= 0) { |
369 | if (rq->errors == 0) | |
370 | rq->errors = -EIO; | |
371 | } | |
349d12a1 BZ |
372 | |
373 | if (drive->media == ide_tape) | |
374 | done = ide_rq_bytes(rq); /* FIXME */ | |
375 | else | |
376 | done = blk_rq_bytes(rq); | |
377 | ||
5b6c942d | 378 | error = uptodate ? 0 : -EIO; |
89f78b32 | 379 | } |
8fccf899 | 380 | |
5b6c942d | 381 | ide_complete_rq(drive, error, done); |
646c0cb6 BZ |
382 | return ide_stopped; |
383 | } | |
384 | ||
385 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
386 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
387 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
388 | "in DMA mode\n", drive->name); | |
389 | ide_dma_off(drive); | |
390 | return ide_do_reset(drive); | |
391 | } | |
646c0cb6 | 392 | |
1823649b BZ |
393 | /* Get the number of bytes to transfer on this interrupt. */ |
394 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 395 | |
3a7d2484 | 396 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
397 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
398 | return ide_do_reset(drive); | |
399 | } | |
8fccf899 | 400 | |
d93bc452 | 401 | if (((ireason & ATAPI_IO) == ATAPI_IO) == write) { |
646c0cb6 BZ |
402 | /* Hopefully, we will never get here */ |
403 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
404 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
405 | (ireason & ATAPI_IO) ? "Write" : "Read", |
406 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
407 | return ide_do_reset(drive); |
408 | } | |
8fccf899 | 409 | |
d93bc452 | 410 | xferfunc = write ? tp_ops->output_data : tp_ops->input_data; |
646c0cb6 | 411 | |
349d12a1 BZ |
412 | if (drive->media == ide_floppy && pc->buf == NULL) { |
413 | done = min_t(unsigned int, bcount, cmd->nleft); | |
414 | ide_pio_bytes(drive, cmd, write, done); | |
415 | } else if (drive->media == ide_tape && pc->bh) { | |
d93bc452 | 416 | done = drive->pc_io_buffers(drive, pc, bcount, write); |
d93bc452 BZ |
417 | } else { |
418 | done = min_t(unsigned int, bcount, pc->req_xfer - pc->xferred); | |
419 | xferfunc(drive, NULL, pc->cur_pos, done); | |
420 | } | |
646c0cb6 BZ |
421 | |
422 | /* Update the current position */ | |
d93bc452 BZ |
423 | pc->xferred += done; |
424 | pc->cur_pos += done; | |
425 | ||
426 | bcount -= done; | |
427 | ||
428 | if (bcount) | |
429 | ide_pad_transfer(drive, write, bcount); | |
430 | ||
431 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes\n", | |
432 | rq->cmd[0], done, bcount); | |
646c0cb6 | 433 | |
646c0cb6 | 434 | /* And set the interrupt handler again */ |
60c0cd02 | 435 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
436 | return ide_started; |
437 | } | |
594c16d8 | 438 | |
60f85019 | 439 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
b788ee9c | 440 | u16 bcount, u8 dma) |
7a254df0 | 441 | { |
60f85019 SS |
442 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
443 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | | |
444 | IDE_VALID_FEATURE | valid_tf; | |
35b5d0be | 445 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
446 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
447 | cmd->tf.lbam = bcount & 0xff; | |
448 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
449 | } |
450 | ||
88a72109 BZ |
451 | static u8 ide_read_ireason(ide_drive_t *drive) |
452 | { | |
3153c26b | 453 | struct ide_taskfile tf; |
88a72109 | 454 | |
3153c26b | 455 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
88a72109 | 456 | |
3153c26b | 457 | return tf.nsect & 3; |
88a72109 BZ |
458 | } |
459 | ||
594c16d8 BZ |
460 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
461 | { | |
594c16d8 BZ |
462 | int retries = 100; |
463 | ||
3a7d2484 BZ |
464 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
465 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
466 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
467 | "a packet command, retrying\n", drive->name); | |
468 | udelay(100); | |
88a72109 | 469 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
470 | if (retries == 0) { |
471 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
472 | "a packet command, ignoring\n", | |
473 | drive->name); | |
3a7d2484 BZ |
474 | ireason |= ATAPI_COD; |
475 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
476 | } |
477 | } | |
478 | ||
479 | return ireason; | |
480 | } | |
481 | ||
baf08f0b BZ |
482 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
483 | { | |
484 | /* Send the actual packet */ | |
485 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
486 | ||
487 | /* Timeout for the packet command */ | |
488 | return WAIT_FLOPPY_CMD; | |
489 | } | |
490 | ||
491 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 492 | { |
b16aabc9 | 493 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 494 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 495 | struct request *rq = hwif->rq; |
baf08f0b BZ |
496 | ide_expiry_t *expiry; |
497 | unsigned int timeout; | |
8c662852 | 498 | int cmd_len; |
594c16d8 BZ |
499 | ide_startstop_t startstop; |
500 | u8 ireason; | |
501 | ||
3a7d2484 | 502 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
503 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
504 | "DRQ isn't asserted\n", drive->name); | |
505 | return startstop; | |
506 | } | |
507 | ||
5f25843f BP |
508 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
509 | if (drive->dma) | |
510 | drive->waiting_for_dma = 1; | |
511 | } | |
512 | ||
8c662852 BP |
513 | if (dev_is_idecd(drive)) { |
514 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
515 | cmd_len = COMMAND_SIZE(rq->cmd[0]); | |
516 | if (cmd_len < ATAPI_MIN_CDB_BYTES) | |
517 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 518 | |
def860d0 BP |
519 | timeout = rq->timeout; |
520 | expiry = ide_cd_expiry; | |
baf08f0b | 521 | } else { |
b16aabc9 BP |
522 | pc = drive->pc; |
523 | ||
def860d0 BP |
524 | cmd_len = ATAPI_MIN_CDB_BYTES; |
525 | ||
526 | /* | |
527 | * If necessary schedule the packet transfer to occur 'timeout' | |
528 | * miliseconds later in ide_delayed_transfer_pc() after the | |
529 | * device says it's ready for a packet. | |
530 | */ | |
531 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
532 | timeout = drive->pc_delay; | |
533 | expiry = &ide_delayed_transfer_pc; | |
534 | } else { | |
535 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
536 | : WAIT_TAPE_CMD; | |
537 | expiry = NULL; | |
538 | } | |
06cc2778 BP |
539 | |
540 | ireason = ide_read_ireason(drive); | |
541 | if (drive->media == ide_tape) | |
542 | ireason = ide_wait_ireason(drive, ireason); | |
543 | ||
544 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
545 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " | |
546 | "a packet command\n", drive->name); | |
547 | ||
548 | return ide_do_reset(drive); | |
549 | } | |
baf08f0b BZ |
550 | } |
551 | ||
60c0cd02 BZ |
552 | hwif->expiry = expiry; |
553 | ||
594c16d8 | 554 | /* Set the interrupt routine */ |
d6251d44 BP |
555 | ide_set_handler(drive, |
556 | (dev_is_idecd(drive) ? drive->irq_handler | |
557 | : ide_pc_intr), | |
60c0cd02 | 558 | timeout); |
594c16d8 | 559 | |
2eba0827 BP |
560 | /* Send the actual packet */ |
561 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
562 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); | |
563 | ||
594c16d8 | 564 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
565 | if (dev_is_idecd(drive)) { |
566 | if (drive->dma) | |
567 | hwif->dma_ops->dma_start(drive); | |
568 | } else { | |
569 | if (pc->flags & PC_FLAG_DMA_OK) { | |
570 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
571 | hwif->dma_ops->dma_start(drive); | |
572 | } | |
594c16d8 BZ |
573 | } |
574 | ||
594c16d8 BZ |
575 | return ide_started; |
576 | } | |
6bf1641c | 577 | |
b788ee9c | 578 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 579 | { |
d77612ab | 580 | struct ide_atapi_pc *pc; |
6bf1641c | 581 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 582 | ide_expiry_t *expiry = NULL; |
e6830a86 | 583 | struct request *rq = hwif->rq; |
28ad91db | 584 | unsigned int timeout; |
392de1d5 | 585 | u16 bcount; |
60f85019 | 586 | u8 valid_tf; |
35b5d0be | 587 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 588 | |
ed48554f | 589 | if (dev_is_idecd(drive)) { |
60f85019 | 590 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
e6830a86 | 591 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 592 | expiry = ide_cd_expiry; |
28ad91db | 593 | timeout = ATAPI_WAIT_PC; |
d77612ab | 594 | |
5ae5412d BZ |
595 | if (drive->dma) |
596 | drive->dma = !ide_dma_prepare(drive, cmd); | |
ed48554f | 597 | } else { |
d77612ab BP |
598 | pc = drive->pc; |
599 | ||
600 | /* We haven't transferred any data yet */ | |
601 | pc->xferred = 0; | |
602 | pc->cur_pos = pc->buf; | |
603 | ||
60f85019 | 604 | valid_tf = IDE_VALID_DEVICE; |
ed48554f BP |
605 | bcount = ((drive->media == ide_tape) ? |
606 | pc->req_xfer : | |
607 | min(pc->req_xfer, 63 * 1024)); | |
6bf1641c | 608 | |
d77612ab BP |
609 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
610 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
611 | ide_dma_off(drive); | |
612 | } | |
6bf1641c | 613 | |
5ae5412d BZ |
614 | if (pc->flags & PC_FLAG_DMA_OK) |
615 | drive->dma = !ide_dma_prepare(drive, cmd); | |
6bf1641c | 616 | |
d77612ab BP |
617 | if (!drive->dma) |
618 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
619 | |
620 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
621 | : WAIT_TAPE_CMD; | |
d77612ab | 622 | } |
6bf1641c | 623 | |
60f85019 | 624 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
b788ee9c BZ |
625 | |
626 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 627 | |
35b5d0be | 628 | if (drq_int) { |
5f25843f BP |
629 | if (drive->dma) |
630 | drive->waiting_for_dma = 0; | |
22117d6e | 631 | hwif->expiry = expiry; |
6bf1641c | 632 | } |
35b5d0be BZ |
633 | |
634 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
635 | ||
636 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
637 | } |
638 | EXPORT_SYMBOL_GPL(ide_issue_pc); |