Commit | Line | Data |
---|---|---|
594c16d8 BZ |
1 | /* |
2 | * ATAPI support. | |
3 | */ | |
4 | ||
5 | #include <linux/kernel.h> | |
6 | #include <linux/delay.h> | |
7 | #include <linux/ide.h> | |
646c0cb6 BZ |
8 | #include <scsi/scsi.h> |
9 | ||
10 | #ifdef DEBUG | |
11 | #define debug_log(fmt, args...) \ | |
12 | printk(KERN_INFO "ide: " fmt, ## args) | |
13 | #else | |
14 | #define debug_log(fmt, args...) do {} while (0) | |
15 | #endif | |
16 | ||
51509eec BZ |
17 | /* |
18 | * Check whether we can support a device, | |
19 | * based on the ATAPI IDENTIFY command results. | |
20 | */ | |
21 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
22 | { | |
23 | u16 *id = drive->id; | |
24 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
25 | ||
26 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
27 | ||
28 | protocol = (gcw[1] & 0xC0) >> 6; | |
29 | device_type = gcw[1] & 0x1F; | |
30 | removable = (gcw[0] & 0x80) >> 7; | |
31 | drq_type = (gcw[0] & 0x60) >> 5; | |
32 | packet_size = gcw[0] & 0x03; | |
33 | ||
34 | #ifdef CONFIG_PPC | |
35 | /* kludge for Apple PowerBook internal zip */ | |
36 | if (drive->media == ide_floppy && device_type == 5 && | |
37 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
38 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
39 | device_type = 0; | |
40 | #endif | |
41 | ||
42 | if (protocol != 2) | |
43 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
44 | s, drive->name, protocol); | |
45 | else if ((drive->media == ide_floppy && device_type != 0) || | |
46 | (drive->media == ide_tape && device_type != 1)) | |
47 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
48 | s, drive->name, device_type); | |
49 | else if (removable == 0) | |
50 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
51 | s, drive->name); | |
52 | else if (drive->media == ide_floppy && drq_type == 3) | |
53 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
54 | "supported\n", s, drive->name, drq_type); | |
55 | else if (packet_size != 0) | |
56 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
57 | "bytes\n", s, drive->name, packet_size); | |
58 | else | |
59 | return 1; | |
60 | return 0; | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
63 | ||
acaa0f5f BZ |
64 | /* PIO data transfer routine using the scatter gather table. */ |
65 | int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
66 | unsigned int bcount, int write) | |
67 | { | |
68 | ide_hwif_t *hwif = drive->hwif; | |
69 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
70 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
71 | struct scatterlist *sg = pc->sg; | |
72 | char *buf; | |
73 | int count, done = 0; | |
74 | ||
75 | while (bcount) { | |
76 | count = min(sg->length - pc->b_count, bcount); | |
77 | ||
78 | if (PageHighMem(sg_page(sg))) { | |
79 | unsigned long flags; | |
80 | ||
81 | local_irq_save(flags); | |
82 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; | |
83 | xf(drive, NULL, buf + pc->b_count, count); | |
84 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
85 | local_irq_restore(flags); | |
86 | } else { | |
87 | buf = sg_virt(sg); | |
88 | xf(drive, NULL, buf + pc->b_count, count); | |
89 | } | |
90 | ||
91 | bcount -= count; | |
92 | pc->b_count += count; | |
93 | done += count; | |
94 | ||
95 | if (pc->b_count == sg->length) { | |
96 | if (!--pc->sg_cnt) | |
97 | break; | |
98 | pc->sg = sg = sg_next(sg); | |
99 | pc->b_count = 0; | |
100 | } | |
101 | } | |
102 | ||
103 | if (bcount) { | |
104 | printk(KERN_ERR "%s: %d leftover bytes, %s\n", drive->name, | |
105 | bcount, write ? "padding with zeros" | |
106 | : "discarding data"); | |
107 | ide_pad_transfer(drive, write, bcount); | |
108 | } | |
109 | ||
110 | return done; | |
111 | } | |
112 | EXPORT_SYMBOL_GPL(ide_io_buffers); | |
113 | ||
7bf7420a BZ |
114 | void ide_init_pc(struct ide_atapi_pc *pc) |
115 | { | |
116 | memset(pc, 0, sizeof(*pc)); | |
117 | pc->buf = pc->pc_buf; | |
118 | pc->buf_size = IDE_PC_BUFFER_SIZE; | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
121 | ||
7645c151 BZ |
122 | /* |
123 | * Generate a new packet command request in front of the request queue, before | |
124 | * the current request, so that it will be processed immediately, on the next | |
125 | * pass through the driver. | |
126 | */ | |
6b0da28b BZ |
127 | static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, |
128 | struct ide_atapi_pc *pc, struct request *rq) | |
7645c151 BZ |
129 | { |
130 | blk_rq_init(NULL, rq); | |
131 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
132 | rq->cmd_flags |= REQ_PREEMPT; | |
133 | rq->buffer = (char *)pc; | |
134 | rq->rq_disk = disk; | |
135 | memcpy(rq->cmd, pc->c, 12); | |
136 | if (drive->media == ide_tape) | |
137 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
138 | ide_do_drive_cmd(drive, rq); | |
139 | } | |
7645c151 | 140 | |
2ac07d92 BZ |
141 | /* |
142 | * Add a special packet command request to the tail of the request queue, | |
143 | * and wait for it to be serviced. | |
144 | */ | |
145 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
146 | struct ide_atapi_pc *pc) | |
147 | { | |
148 | struct request *rq; | |
149 | int error; | |
150 | ||
151 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
152 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
153 | rq->buffer = (char *)pc; | |
154 | memcpy(rq->cmd, pc->c, 12); | |
155 | if (drive->media == ide_tape) | |
156 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
157 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
158 | blk_put_request(rq); | |
159 | ||
160 | return error; | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
163 | ||
de699ad5 BZ |
164 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
165 | { | |
166 | struct ide_atapi_pc pc; | |
167 | ||
168 | ide_init_pc(&pc); | |
169 | pc.c[0] = TEST_UNIT_READY; | |
170 | ||
171 | return ide_queue_pc_tail(drive, disk, &pc); | |
172 | } | |
173 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
174 | ||
0c8a6c7a BZ |
175 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
176 | { | |
177 | struct ide_atapi_pc pc; | |
178 | ||
179 | ide_init_pc(&pc); | |
180 | pc.c[0] = START_STOP; | |
181 | pc.c[4] = start; | |
182 | ||
183 | if (drive->media == ide_tape) | |
184 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
185 | ||
186 | return ide_queue_pc_tail(drive, disk, &pc); | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
189 | ||
0578042d BZ |
190 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
191 | { | |
192 | struct ide_atapi_pc pc; | |
193 | ||
194 | if (drive->atapi_flags & IDE_AFLAG_NO_DOORLOCK) | |
195 | return 0; | |
196 | ||
197 | ide_init_pc(&pc); | |
198 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
199 | pc.c[4] = on; | |
200 | ||
201 | return ide_queue_pc_tail(drive, disk, &pc); | |
202 | } | |
203 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
204 | ||
6b0da28b BZ |
205 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
206 | { | |
207 | ide_init_pc(pc); | |
208 | pc->c[0] = REQUEST_SENSE; | |
209 | if (drive->media == ide_floppy) { | |
210 | pc->c[4] = 255; | |
211 | pc->req_xfer = 18; | |
212 | } else { | |
213 | pc->c[4] = 20; | |
214 | pc->req_xfer = 20; | |
215 | } | |
216 | } | |
217 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
218 | ||
219 | /* | |
220 | * Called when an error was detected during the last packet command. | |
221 | * We queue a request sense packet command in the head of the request list. | |
222 | */ | |
223 | void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk) | |
224 | { | |
225 | struct request *rq = &drive->request_sense_rq; | |
226 | struct ide_atapi_pc *pc = &drive->request_sense_pc; | |
227 | ||
228 | (void)ide_read_error(drive); | |
229 | ide_create_request_sense_cmd(drive, pc); | |
230 | if (drive->media == ide_tape) | |
231 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); | |
232 | ide_queue_pc_head(drive, disk, pc, rq); | |
233 | } | |
234 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
235 | ||
844b9468 BZ |
236 | int ide_scsi_expiry(ide_drive_t *drive) |
237 | { | |
238 | struct ide_atapi_pc *pc = drive->pc; | |
239 | ||
240 | debug_log("%s called for %lu at %lu\n", __func__, | |
241 | pc->scsi_cmd->serial_number, jiffies); | |
242 | ||
243 | pc->flags |= PC_FLAG_TIMEDOUT; | |
244 | ||
245 | return 0; /* we do not want the IDE subsystem to retry */ | |
246 | } | |
247 | EXPORT_SYMBOL_GPL(ide_scsi_expiry); | |
248 | ||
aa5d2de7 BZ |
249 | /* |
250 | * This is the usual interrupt handler which will be called during a packet | |
251 | * command. We will transfer some of the data (as requested by the drive) | |
252 | * and will re-point interrupt handler to us. | |
253 | */ | |
254 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 255 | { |
2b9efba4 | 256 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 257 | ide_hwif_t *hwif = drive->hwif; |
8fccf899 | 258 | struct request *rq = hwif->hwgroup->rq; |
374e042c | 259 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 | 260 | xfer_func_t *xferfunc; |
844b9468 BZ |
261 | ide_expiry_t *expiry; |
262 | unsigned int timeout, temp; | |
646c0cb6 | 263 | u16 bcount; |
97100fc8 | 264 | u8 stat, ireason, scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI), dsc = 0; |
646c0cb6 BZ |
265 | |
266 | debug_log("Enter %s - interrupt handler\n", __func__); | |
267 | ||
844b9468 BZ |
268 | if (scsi) { |
269 | timeout = ide_scsi_get_timeout(pc); | |
270 | expiry = ide_scsi_expiry; | |
271 | } else { | |
272 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
273 | : WAIT_TAPE_CMD; | |
274 | expiry = NULL; | |
275 | } | |
276 | ||
646c0cb6 | 277 | if (pc->flags & PC_FLAG_TIMEDOUT) { |
b14c7212 | 278 | drive->pc_callback(drive, 0); |
646c0cb6 BZ |
279 | return ide_stopped; |
280 | } | |
281 | ||
282 | /* Clear the interrupt */ | |
374e042c | 283 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
284 | |
285 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
286 | if (hwif->dma_ops->dma_end(drive) || | |
3a7d2484 | 287 | (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) { |
646c0cb6 BZ |
288 | if (drive->media == ide_floppy && !scsi) |
289 | printk(KERN_ERR "%s: DMA %s error\n", | |
290 | drive->name, rq_data_dir(pc->rq) | |
291 | ? "write" : "read"); | |
292 | pc->flags |= PC_FLAG_DMA_ERROR; | |
293 | } else { | |
294 | pc->xferred = pc->req_xfer; | |
85e39035 BZ |
295 | if (drive->pc_update_buffers) |
296 | drive->pc_update_buffers(drive, pc); | |
646c0cb6 BZ |
297 | } |
298 | debug_log("%s: DMA finished\n", drive->name); | |
299 | } | |
300 | ||
301 | /* No more interrupts */ | |
3a7d2484 | 302 | if ((stat & ATA_DRQ) == 0) { |
646c0cb6 BZ |
303 | debug_log("Packet command completed, %d bytes transferred\n", |
304 | pc->xferred); | |
305 | ||
306 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
307 | ||
308 | local_irq_enable_in_hardirq(); | |
309 | ||
310 | if (drive->media == ide_tape && !scsi && | |
3a7d2484 BZ |
311 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
312 | stat &= ~ATA_ERR; | |
8fccf899 | 313 | |
3a7d2484 | 314 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
315 | /* Error detected */ |
316 | debug_log("%s: I/O error\n", drive->name); | |
317 | ||
318 | if (drive->media != ide_tape || scsi) { | |
319 | pc->rq->errors++; | |
320 | if (scsi) | |
321 | goto cmd_finished; | |
322 | } | |
323 | ||
8fccf899 | 324 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
325 | printk(KERN_ERR "%s: I/O error in request sense" |
326 | " command\n", drive->name); | |
327 | return ide_do_reset(drive); | |
328 | } | |
329 | ||
8fccf899 | 330 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
331 | |
332 | /* Retry operation */ | |
6b0da28b | 333 | ide_retry_pc(drive, rq->rq_disk); |
8fccf899 | 334 | |
646c0cb6 BZ |
335 | /* queued, but not started */ |
336 | return ide_stopped; | |
337 | } | |
338 | cmd_finished: | |
339 | pc->error = 0; | |
b14c7212 BZ |
340 | |
341 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
342 | dsc = 1; | |
8fccf899 | 343 | |
646c0cb6 | 344 | /* Command finished - Call the callback function */ |
b14c7212 | 345 | drive->pc_callback(drive, dsc); |
8fccf899 | 346 | |
646c0cb6 BZ |
347 | return ide_stopped; |
348 | } | |
349 | ||
350 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
351 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
352 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
353 | "in DMA mode\n", drive->name); | |
354 | ide_dma_off(drive); | |
355 | return ide_do_reset(drive); | |
356 | } | |
646c0cb6 | 357 | |
1823649b BZ |
358 | /* Get the number of bytes to transfer on this interrupt. */ |
359 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 360 | |
3a7d2484 | 361 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
362 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
363 | return ide_do_reset(drive); | |
364 | } | |
8fccf899 | 365 | |
3a7d2484 BZ |
366 | if (((ireason & ATAPI_IO) == ATAPI_IO) == |
367 | !!(pc->flags & PC_FLAG_WRITING)) { | |
646c0cb6 BZ |
368 | /* Hopefully, we will never get here */ |
369 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
370 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
371 | (ireason & ATAPI_IO) ? "Write" : "Read", |
372 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
373 | return ide_do_reset(drive); |
374 | } | |
8fccf899 | 375 | |
646c0cb6 BZ |
376 | if (!(pc->flags & PC_FLAG_WRITING)) { |
377 | /* Reading - Check that we have enough space */ | |
378 | temp = pc->xferred + bcount; | |
379 | if (temp > pc->req_xfer) { | |
380 | if (temp > pc->buf_size) { | |
381 | printk(KERN_ERR "%s: The device wants to send " | |
382 | "us more data than expected - " | |
383 | "discarding data\n", | |
384 | drive->name); | |
385 | if (scsi) | |
386 | temp = pc->buf_size - pc->xferred; | |
387 | else | |
388 | temp = 0; | |
389 | if (temp) { | |
390 | if (pc->sg) | |
85e39035 BZ |
391 | drive->pc_io_buffers(drive, pc, |
392 | temp, 0); | |
646c0cb6 | 393 | else |
374e042c | 394 | tp_ops->input_data(drive, NULL, |
646c0cb6 BZ |
395 | pc->cur_pos, temp); |
396 | printk(KERN_ERR "%s: transferred %d of " | |
397 | "%d bytes\n", | |
398 | drive->name, | |
399 | temp, bcount); | |
400 | } | |
401 | pc->xferred += temp; | |
402 | pc->cur_pos += temp; | |
403 | ide_pad_transfer(drive, 0, bcount - temp); | |
844b9468 | 404 | goto next_irq; |
646c0cb6 BZ |
405 | } |
406 | debug_log("The device wants to send us more data than " | |
407 | "expected - allowing transfer\n"); | |
408 | } | |
374e042c | 409 | xferfunc = tp_ops->input_data; |
646c0cb6 | 410 | } else |
374e042c | 411 | xferfunc = tp_ops->output_data; |
646c0cb6 BZ |
412 | |
413 | if ((drive->media == ide_floppy && !scsi && !pc->buf) || | |
414 | (drive->media == ide_tape && !scsi && pc->bh) || | |
acaa0f5f | 415 | (scsi && pc->sg)) { |
85e39035 | 416 | int done = drive->pc_io_buffers(drive, pc, bcount, |
acaa0f5f BZ |
417 | !!(pc->flags & PC_FLAG_WRITING)); |
418 | ||
419 | /* FIXME: don't do partial completions */ | |
420 | if (drive->media == ide_floppy && !scsi) | |
421 | ide_end_request(drive, 1, done >> 9); | |
422 | } else | |
646c0cb6 BZ |
423 | xferfunc(drive, NULL, pc->cur_pos, bcount); |
424 | ||
425 | /* Update the current position */ | |
426 | pc->xferred += bcount; | |
427 | pc->cur_pos += bcount; | |
428 | ||
429 | debug_log("[cmd %x] transferred %d bytes on that intr.\n", | |
8fccf899 | 430 | rq->cmd[0], bcount); |
844b9468 | 431 | next_irq: |
646c0cb6 | 432 | /* And set the interrupt handler again */ |
aa5d2de7 | 433 | ide_set_handler(drive, ide_pc_intr, timeout, expiry); |
646c0cb6 BZ |
434 | return ide_started; |
435 | } | |
594c16d8 | 436 | |
88a72109 BZ |
437 | static u8 ide_read_ireason(ide_drive_t *drive) |
438 | { | |
439 | ide_task_t task; | |
440 | ||
441 | memset(&task, 0, sizeof(task)); | |
442 | task.tf_flags = IDE_TFLAG_IN_NSECT; | |
443 | ||
374e042c | 444 | drive->hwif->tp_ops->tf_read(drive, &task); |
88a72109 BZ |
445 | |
446 | return task.tf.nsect & 3; | |
447 | } | |
448 | ||
594c16d8 BZ |
449 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
450 | { | |
594c16d8 BZ |
451 | int retries = 100; |
452 | ||
3a7d2484 BZ |
453 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
454 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
455 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
456 | "a packet command, retrying\n", drive->name); | |
457 | udelay(100); | |
88a72109 | 458 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
459 | if (retries == 0) { |
460 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
461 | "a packet command, ignoring\n", | |
462 | drive->name); | |
3a7d2484 BZ |
463 | ireason |= ATAPI_COD; |
464 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
465 | } |
466 | } | |
467 | ||
468 | return ireason; | |
469 | } | |
470 | ||
baf08f0b BZ |
471 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
472 | { | |
473 | /* Send the actual packet */ | |
474 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
475 | ||
476 | /* Timeout for the packet command */ | |
477 | return WAIT_FLOPPY_CMD; | |
478 | } | |
479 | ||
480 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 481 | { |
2b9efba4 | 482 | struct ide_atapi_pc *pc = drive->pc; |
594c16d8 | 483 | ide_hwif_t *hwif = drive->hwif; |
8fccf899 | 484 | struct request *rq = hwif->hwgroup->rq; |
baf08f0b BZ |
485 | ide_expiry_t *expiry; |
486 | unsigned int timeout; | |
594c16d8 BZ |
487 | ide_startstop_t startstop; |
488 | u8 ireason; | |
489 | ||
3a7d2484 | 490 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
491 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
492 | "DRQ isn't asserted\n", drive->name); | |
493 | return startstop; | |
494 | } | |
495 | ||
88a72109 | 496 | ireason = ide_read_ireason(drive); |
97100fc8 BZ |
497 | if (drive->media == ide_tape && |
498 | (drive->dev_flags & IDE_DFLAG_SCSI) == 0) | |
594c16d8 BZ |
499 | ireason = ide_wait_ireason(drive, ireason); |
500 | ||
3a7d2484 | 501 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { |
594c16d8 BZ |
502 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " |
503 | "a packet command\n", drive->name); | |
504 | return ide_do_reset(drive); | |
505 | } | |
506 | ||
baf08f0b BZ |
507 | /* |
508 | * If necessary schedule the packet transfer to occur 'timeout' | |
509 | * miliseconds later in ide_delayed_transfer_pc() after the device | |
510 | * says it's ready for a packet. | |
511 | */ | |
512 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
513 | timeout = drive->pc_delay; | |
514 | expiry = &ide_delayed_transfer_pc; | |
515 | } else { | |
97100fc8 | 516 | if (drive->dev_flags & IDE_DFLAG_SCSI) { |
baf08f0b BZ |
517 | timeout = ide_scsi_get_timeout(pc); |
518 | expiry = ide_scsi_expiry; | |
519 | } else { | |
520 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
521 | : WAIT_TAPE_CMD; | |
522 | expiry = NULL; | |
523 | } | |
524 | } | |
525 | ||
594c16d8 | 526 | /* Set the interrupt routine */ |
aa5d2de7 | 527 | ide_set_handler(drive, ide_pc_intr, timeout, expiry); |
594c16d8 BZ |
528 | |
529 | /* Begin DMA, if necessary */ | |
530 | if (pc->flags & PC_FLAG_DMA_OK) { | |
531 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
532 | hwif->dma_ops->dma_start(drive); | |
533 | } | |
534 | ||
535 | /* Send the actual packet */ | |
ea68d270 | 536 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) |
8fccf899 | 537 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12); |
594c16d8 BZ |
538 | |
539 | return ide_started; | |
540 | } | |
6bf1641c | 541 | |
baf08f0b | 542 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout, |
6bf1641c BZ |
543 | ide_expiry_t *expiry) |
544 | { | |
2b9efba4 | 545 | struct ide_atapi_pc *pc = drive->pc; |
6bf1641c | 546 | ide_hwif_t *hwif = drive->hwif; |
f9476b96 | 547 | u32 tf_flags; |
6bf1641c | 548 | u16 bcount; |
0a9b6f88 | 549 | u8 scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI); |
6bf1641c BZ |
550 | |
551 | /* We haven't transferred any data yet */ | |
552 | pc->xferred = 0; | |
553 | pc->cur_pos = pc->buf; | |
554 | ||
555 | /* Request to transfer the entire buffer at once */ | |
97100fc8 | 556 | if (drive->media == ide_tape && scsi == 0) |
6bf1641c BZ |
557 | bcount = pc->req_xfer; |
558 | else | |
559 | bcount = min(pc->req_xfer, 63 * 1024); | |
560 | ||
561 | if (pc->flags & PC_FLAG_DMA_ERROR) { | |
562 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
563 | ide_dma_off(drive); | |
564 | } | |
565 | ||
97100fc8 BZ |
566 | if ((pc->flags & PC_FLAG_DMA_OK) && |
567 | (drive->dev_flags & IDE_DFLAG_USING_DMA)) { | |
568 | if (scsi) | |
6bf1641c | 569 | hwif->sg_mapped = 1; |
0a9b6f88 | 570 | drive->dma = !hwif->dma_ops->dma_setup(drive); |
97100fc8 | 571 | if (scsi) |
6bf1641c BZ |
572 | hwif->sg_mapped = 0; |
573 | } | |
574 | ||
0a9b6f88 | 575 | if (!drive->dma) |
6bf1641c BZ |
576 | pc->flags &= ~PC_FLAG_DMA_OK; |
577 | ||
f9476b96 BP |
578 | if (scsi) |
579 | tf_flags = 0; | |
580 | else if (drive->media == ide_cdrom || drive->media == ide_optical) | |
581 | tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL; | |
582 | else | |
583 | tf_flags = IDE_TFLAG_OUT_DEVICE; | |
584 | ||
585 | ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma); | |
6bf1641c BZ |
586 | |
587 | /* Issue the packet command */ | |
ac77ef8b | 588 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
baf08f0b | 589 | ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc, |
6bf1641c BZ |
590 | timeout, NULL); |
591 | return ide_started; | |
592 | } else { | |
593 | ide_execute_pkt_cmd(drive); | |
baf08f0b | 594 | return ide_transfer_pc(drive); |
6bf1641c BZ |
595 | } |
596 | } | |
597 | EXPORT_SYMBOL_GPL(ide_issue_pc); |