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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 | ||
85e39035 | 249 | ide_startstop_t ide_pc_intr(ide_drive_t *drive, ide_handler_t *handler) |
646c0cb6 | 250 | { |
2b9efba4 | 251 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 252 | ide_hwif_t *hwif = drive->hwif; |
8fccf899 | 253 | struct request *rq = hwif->hwgroup->rq; |
374e042c | 254 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 | 255 | xfer_func_t *xferfunc; |
844b9468 BZ |
256 | ide_expiry_t *expiry; |
257 | unsigned int timeout, temp; | |
646c0cb6 | 258 | u16 bcount; |
b14c7212 | 259 | u8 stat, ireason, scsi = drive->scsi, dsc = 0; |
646c0cb6 BZ |
260 | |
261 | debug_log("Enter %s - interrupt handler\n", __func__); | |
262 | ||
844b9468 BZ |
263 | if (scsi) { |
264 | timeout = ide_scsi_get_timeout(pc); | |
265 | expiry = ide_scsi_expiry; | |
266 | } else { | |
267 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
268 | : WAIT_TAPE_CMD; | |
269 | expiry = NULL; | |
270 | } | |
271 | ||
646c0cb6 | 272 | if (pc->flags & PC_FLAG_TIMEDOUT) { |
b14c7212 | 273 | drive->pc_callback(drive, 0); |
646c0cb6 BZ |
274 | return ide_stopped; |
275 | } | |
276 | ||
277 | /* Clear the interrupt */ | |
374e042c | 278 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
279 | |
280 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
281 | if (hwif->dma_ops->dma_end(drive) || | |
3a7d2484 | 282 | (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) { |
646c0cb6 BZ |
283 | if (drive->media == ide_floppy && !scsi) |
284 | printk(KERN_ERR "%s: DMA %s error\n", | |
285 | drive->name, rq_data_dir(pc->rq) | |
286 | ? "write" : "read"); | |
287 | pc->flags |= PC_FLAG_DMA_ERROR; | |
288 | } else { | |
289 | pc->xferred = pc->req_xfer; | |
85e39035 BZ |
290 | if (drive->pc_update_buffers) |
291 | drive->pc_update_buffers(drive, pc); | |
646c0cb6 BZ |
292 | } |
293 | debug_log("%s: DMA finished\n", drive->name); | |
294 | } | |
295 | ||
296 | /* No more interrupts */ | |
3a7d2484 | 297 | if ((stat & ATA_DRQ) == 0) { |
646c0cb6 BZ |
298 | debug_log("Packet command completed, %d bytes transferred\n", |
299 | pc->xferred); | |
300 | ||
301 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
302 | ||
303 | local_irq_enable_in_hardirq(); | |
304 | ||
305 | if (drive->media == ide_tape && !scsi && | |
3a7d2484 BZ |
306 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
307 | stat &= ~ATA_ERR; | |
8fccf899 | 308 | |
3a7d2484 | 309 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
310 | /* Error detected */ |
311 | debug_log("%s: I/O error\n", drive->name); | |
312 | ||
313 | if (drive->media != ide_tape || scsi) { | |
314 | pc->rq->errors++; | |
315 | if (scsi) | |
316 | goto cmd_finished; | |
317 | } | |
318 | ||
8fccf899 | 319 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
320 | printk(KERN_ERR "%s: I/O error in request sense" |
321 | " command\n", drive->name); | |
322 | return ide_do_reset(drive); | |
323 | } | |
324 | ||
8fccf899 | 325 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
326 | |
327 | /* Retry operation */ | |
6b0da28b | 328 | ide_retry_pc(drive, rq->rq_disk); |
8fccf899 | 329 | |
646c0cb6 BZ |
330 | /* queued, but not started */ |
331 | return ide_stopped; | |
332 | } | |
333 | cmd_finished: | |
334 | pc->error = 0; | |
b14c7212 BZ |
335 | |
336 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
337 | dsc = 1; | |
8fccf899 | 338 | |
646c0cb6 | 339 | /* Command finished - Call the callback function */ |
b14c7212 | 340 | drive->pc_callback(drive, dsc); |
8fccf899 | 341 | |
646c0cb6 BZ |
342 | return ide_stopped; |
343 | } | |
344 | ||
345 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
346 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
347 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
348 | "in DMA mode\n", drive->name); | |
349 | ide_dma_off(drive); | |
350 | return ide_do_reset(drive); | |
351 | } | |
646c0cb6 | 352 | |
1823649b BZ |
353 | /* Get the number of bytes to transfer on this interrupt. */ |
354 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 355 | |
3a7d2484 | 356 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
357 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
358 | return ide_do_reset(drive); | |
359 | } | |
8fccf899 | 360 | |
3a7d2484 BZ |
361 | if (((ireason & ATAPI_IO) == ATAPI_IO) == |
362 | !!(pc->flags & PC_FLAG_WRITING)) { | |
646c0cb6 BZ |
363 | /* Hopefully, we will never get here */ |
364 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
365 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
366 | (ireason & ATAPI_IO) ? "Write" : "Read", |
367 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
368 | return ide_do_reset(drive); |
369 | } | |
8fccf899 | 370 | |
646c0cb6 BZ |
371 | if (!(pc->flags & PC_FLAG_WRITING)) { |
372 | /* Reading - Check that we have enough space */ | |
373 | temp = pc->xferred + bcount; | |
374 | if (temp > pc->req_xfer) { | |
375 | if (temp > pc->buf_size) { | |
376 | printk(KERN_ERR "%s: The device wants to send " | |
377 | "us more data than expected - " | |
378 | "discarding data\n", | |
379 | drive->name); | |
380 | if (scsi) | |
381 | temp = pc->buf_size - pc->xferred; | |
382 | else | |
383 | temp = 0; | |
384 | if (temp) { | |
385 | if (pc->sg) | |
85e39035 BZ |
386 | drive->pc_io_buffers(drive, pc, |
387 | temp, 0); | |
646c0cb6 | 388 | else |
374e042c | 389 | tp_ops->input_data(drive, NULL, |
646c0cb6 BZ |
390 | pc->cur_pos, temp); |
391 | printk(KERN_ERR "%s: transferred %d of " | |
392 | "%d bytes\n", | |
393 | drive->name, | |
394 | temp, bcount); | |
395 | } | |
396 | pc->xferred += temp; | |
397 | pc->cur_pos += temp; | |
398 | ide_pad_transfer(drive, 0, bcount - temp); | |
844b9468 | 399 | goto next_irq; |
646c0cb6 BZ |
400 | } |
401 | debug_log("The device wants to send us more data than " | |
402 | "expected - allowing transfer\n"); | |
403 | } | |
374e042c | 404 | xferfunc = tp_ops->input_data; |
646c0cb6 | 405 | } else |
374e042c | 406 | xferfunc = tp_ops->output_data; |
646c0cb6 BZ |
407 | |
408 | if ((drive->media == ide_floppy && !scsi && !pc->buf) || | |
409 | (drive->media == ide_tape && !scsi && pc->bh) || | |
acaa0f5f | 410 | (scsi && pc->sg)) { |
85e39035 | 411 | int done = drive->pc_io_buffers(drive, pc, bcount, |
acaa0f5f BZ |
412 | !!(pc->flags & PC_FLAG_WRITING)); |
413 | ||
414 | /* FIXME: don't do partial completions */ | |
415 | if (drive->media == ide_floppy && !scsi) | |
416 | ide_end_request(drive, 1, done >> 9); | |
417 | } else | |
646c0cb6 BZ |
418 | xferfunc(drive, NULL, pc->cur_pos, bcount); |
419 | ||
420 | /* Update the current position */ | |
421 | pc->xferred += bcount; | |
422 | pc->cur_pos += bcount; | |
423 | ||
424 | debug_log("[cmd %x] transferred %d bytes on that intr.\n", | |
8fccf899 | 425 | rq->cmd[0], bcount); |
844b9468 | 426 | next_irq: |
646c0cb6 BZ |
427 | /* And set the interrupt handler again */ |
428 | ide_set_handler(drive, handler, timeout, expiry); | |
429 | return ide_started; | |
430 | } | |
431 | EXPORT_SYMBOL_GPL(ide_pc_intr); | |
594c16d8 | 432 | |
88a72109 BZ |
433 | static u8 ide_read_ireason(ide_drive_t *drive) |
434 | { | |
435 | ide_task_t task; | |
436 | ||
437 | memset(&task, 0, sizeof(task)); | |
438 | task.tf_flags = IDE_TFLAG_IN_NSECT; | |
439 | ||
374e042c | 440 | drive->hwif->tp_ops->tf_read(drive, &task); |
88a72109 BZ |
441 | |
442 | return task.tf.nsect & 3; | |
443 | } | |
444 | ||
594c16d8 BZ |
445 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
446 | { | |
594c16d8 BZ |
447 | int retries = 100; |
448 | ||
3a7d2484 BZ |
449 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
450 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
451 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
452 | "a packet command, retrying\n", drive->name); | |
453 | udelay(100); | |
88a72109 | 454 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
455 | if (retries == 0) { |
456 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
457 | "a packet command, ignoring\n", | |
458 | drive->name); | |
3a7d2484 BZ |
459 | ireason |= ATAPI_COD; |
460 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
461 | } |
462 | } | |
463 | ||
464 | return ireason; | |
465 | } | |
466 | ||
2b9efba4 | 467 | ide_startstop_t ide_transfer_pc(ide_drive_t *drive, |
594c16d8 BZ |
468 | ide_handler_t *handler, unsigned int timeout, |
469 | ide_expiry_t *expiry) | |
470 | { | |
2b9efba4 | 471 | struct ide_atapi_pc *pc = drive->pc; |
594c16d8 | 472 | ide_hwif_t *hwif = drive->hwif; |
8fccf899 | 473 | struct request *rq = hwif->hwgroup->rq; |
594c16d8 BZ |
474 | ide_startstop_t startstop; |
475 | u8 ireason; | |
476 | ||
3a7d2484 | 477 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
478 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
479 | "DRQ isn't asserted\n", drive->name); | |
480 | return startstop; | |
481 | } | |
482 | ||
88a72109 | 483 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
484 | if (drive->media == ide_tape && !drive->scsi) |
485 | ireason = ide_wait_ireason(drive, ireason); | |
486 | ||
3a7d2484 | 487 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { |
594c16d8 BZ |
488 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " |
489 | "a packet command\n", drive->name); | |
490 | return ide_do_reset(drive); | |
491 | } | |
492 | ||
493 | /* Set the interrupt routine */ | |
494 | ide_set_handler(drive, handler, timeout, expiry); | |
495 | ||
496 | /* Begin DMA, if necessary */ | |
497 | if (pc->flags & PC_FLAG_DMA_OK) { | |
498 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
499 | hwif->dma_ops->dma_start(drive); | |
500 | } | |
501 | ||
502 | /* Send the actual packet */ | |
ea68d270 | 503 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) |
8fccf899 | 504 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12); |
594c16d8 BZ |
505 | |
506 | return ide_started; | |
507 | } | |
508 | EXPORT_SYMBOL_GPL(ide_transfer_pc); | |
6bf1641c | 509 | |
2b9efba4 | 510 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, |
6bf1641c BZ |
511 | ide_handler_t *handler, unsigned int timeout, |
512 | ide_expiry_t *expiry) | |
513 | { | |
2b9efba4 | 514 | struct ide_atapi_pc *pc = drive->pc; |
6bf1641c BZ |
515 | ide_hwif_t *hwif = drive->hwif; |
516 | u16 bcount; | |
517 | u8 dma = 0; | |
518 | ||
519 | /* We haven't transferred any data yet */ | |
520 | pc->xferred = 0; | |
521 | pc->cur_pos = pc->buf; | |
522 | ||
523 | /* Request to transfer the entire buffer at once */ | |
524 | if (drive->media == ide_tape && !drive->scsi) | |
525 | bcount = pc->req_xfer; | |
526 | else | |
527 | bcount = min(pc->req_xfer, 63 * 1024); | |
528 | ||
529 | if (pc->flags & PC_FLAG_DMA_ERROR) { | |
530 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
531 | ide_dma_off(drive); | |
532 | } | |
533 | ||
534 | if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) { | |
535 | if (drive->scsi) | |
536 | hwif->sg_mapped = 1; | |
537 | dma = !hwif->dma_ops->dma_setup(drive); | |
538 | if (drive->scsi) | |
539 | hwif->sg_mapped = 0; | |
540 | } | |
541 | ||
542 | if (!dma) | |
543 | pc->flags &= ~PC_FLAG_DMA_OK; | |
544 | ||
545 | ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE, | |
546 | bcount, dma); | |
547 | ||
548 | /* Issue the packet command */ | |
ac77ef8b | 549 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
aaaade3f | 550 | ide_execute_command(drive, ATA_CMD_PACKET, handler, |
6bf1641c BZ |
551 | timeout, NULL); |
552 | return ide_started; | |
553 | } else { | |
554 | ide_execute_pkt_cmd(drive); | |
555 | return (*handler)(drive); | |
556 | } | |
557 | } | |
558 | EXPORT_SYMBOL_GPL(ide_issue_pc); |