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PCI: avoid save the same type of cap multiple times
[linux-2.6/mini2440.git] / drivers / ide / ide-taskfile.c
blob5eb6fa15dc4df6d65c5408869b6e22027d049085
1 /*
2 * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003
3 *
4 * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
5 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
6 * Copyright (C) 2001-2002 Klaus Smolin
7 * IBM Storage Technology Division
8 * Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz
9 *
10 * The big the bad and the ugly.
11 */
12
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/timer.h>
18 #include <linux/mm.h>
19 #include <linux/sched.h>
20 #include <linux/interrupt.h>
21 #include <linux/major.h>
22 #include <linux/errno.h>
23 #include <linux/genhd.h>
24 #include <linux/blkpg.h>
25 #include <linux/slab.h>
26 #include <linux/pci.h>
27 #include <linux/delay.h>
28 #include <linux/hdreg.h>
29 #include <linux/ide.h>
30 #include <linux/bitops.h>
31 #include <linux/scatterlist.h>
32
33 #include <asm/byteorder.h>
34 #include <asm/irq.h>
35 #include <asm/uaccess.h>
36 #include <asm/io.h>
37
38 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
39 {
40 ide_hwif_t *hwif = drive->hwif;
41 struct ide_taskfile *tf = &task->tf;
42 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
43
44 if (task->tf_flags & IDE_TFLAG_FLAGGED)
45 HIHI = 0xFF;
46
47 #ifdef DEBUG
48 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
49 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
50 drive->name, tf->feature, tf->nsect, tf->lbal,
51 tf->lbam, tf->lbah, tf->device, tf->command);
52 printk("%s: hob: nsect 0x%02x lbal 0x%02x "
53 "lbam 0x%02x lbah 0x%02x\n",
54 drive->name, tf->hob_nsect, tf->hob_lbal,
55 tf->hob_lbam, tf->hob_lbah);
56 #endif
57
58 ide_set_irq(drive, 1);
59
60 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
61 SELECT_MASK(drive, 0);
62
63 if (task->tf_flags & IDE_TFLAG_OUT_DATA)
64 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
65
66 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
67 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
68 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
69 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
70 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
71 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
72 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
73 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
74 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
75 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
76
77 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
78 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
79 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
80 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
81 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
82 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
83 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
84 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
85 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
86 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
87
88 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
89 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
90 }
91
92 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
93 {
94 ide_task_t args;
95
96 memset(&args, 0, sizeof(ide_task_t));
97 args.tf.nsect = 0x01;
98 if (drive->media == ide_disk)
99 args.tf.command = WIN_IDENTIFY;
100 else
101 args.tf.command = WIN_PIDENTIFY;
102 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
103 args.data_phase = TASKFILE_IN;
104 return ide_raw_taskfile(drive, &args, buf, 1);
105 }
106
107 static int inline task_dma_ok(ide_task_t *task)
108 {
109 if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
110 return 1;
111
112 switch (task->tf.command) {
113 case WIN_WRITEDMA_ONCE:
114 case WIN_WRITEDMA:
115 case WIN_WRITEDMA_EXT:
116 case WIN_READDMA_ONCE:
117 case WIN_READDMA:
118 case WIN_READDMA_EXT:
119 case WIN_IDENTIFY_DMA:
120 return 1;
121 }
122
123 return 0;
124 }
125
126 static ide_startstop_t task_no_data_intr(ide_drive_t *);
127 static ide_startstop_t set_geometry_intr(ide_drive_t *);
128 static ide_startstop_t recal_intr(ide_drive_t *);
129 static ide_startstop_t set_multmode_intr(ide_drive_t *);
130 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
131 static ide_startstop_t task_in_intr(ide_drive_t *);
132
133 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
134 {
135 ide_hwif_t *hwif = HWIF(drive);
136 struct ide_taskfile *tf = &task->tf;
137 ide_handler_t *handler = NULL;
138
139 if (task->data_phase == TASKFILE_MULTI_IN ||
140 task->data_phase == TASKFILE_MULTI_OUT) {
141 if (!drive->mult_count) {
142 printk(KERN_ERR "%s: multimode not set!\n",
143 drive->name);
144 return ide_stopped;
145 }
146 }
147
148 if (task->tf_flags & IDE_TFLAG_FLAGGED)
149 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
150
151 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
152 ide_tf_load(drive, task);
153
154 switch (task->data_phase) {
155 case TASKFILE_MULTI_OUT:
156 case TASKFILE_OUT:
157 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
158 ndelay(400); /* FIXME */
159 return pre_task_out_intr(drive, task->rq);
160 case TASKFILE_MULTI_IN:
161 case TASKFILE_IN:
162 handler = task_in_intr;
163 /* fall-through */
164 case TASKFILE_NO_DATA:
165 if (handler == NULL)
166 handler = task_no_data_intr;
167 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
168 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
169 switch (tf->command) {
170 case WIN_SPECIFY: handler = set_geometry_intr; break;
171 case WIN_RESTORE: handler = recal_intr; break;
172 case WIN_SETMULT: handler = set_multmode_intr; break;
173 }
174 }
175 ide_execute_command(drive, tf->command, handler,
176 WAIT_WORSTCASE, NULL);
177 return ide_started;
178 default:
179 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
180 hwif->dma_setup(drive))
181 return ide_stopped;
182 hwif->dma_exec_cmd(drive, tf->command);
183 hwif->dma_start(drive);
184 return ide_started;
185 }
186 }
187 EXPORT_SYMBOL_GPL(do_rw_taskfile);
188
189 /*
190 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
191 */
192 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
193 {
194 ide_hwif_t *hwif = HWIF(drive);
195 u8 stat;
196
197 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
198 drive->mult_count = drive->mult_req;
199 } else {
200 drive->mult_req = drive->mult_count = 0;
201 drive->special.b.recalibrate = 1;
202 (void) ide_dump_status(drive, "set_multmode", stat);
203 }
204 return ide_stopped;
205 }
206
207 /*
208 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
209 */
210 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
211 {
212 ide_hwif_t *hwif = HWIF(drive);
213 int retries = 5;
214 u8 stat;
215
216 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
217 udelay(10);
218
219 if (OK_STAT(stat, READY_STAT, BAD_STAT))
220 return ide_stopped;
221
222 if (stat & (ERR_STAT|DRQ_STAT))
223 return ide_error(drive, "set_geometry_intr", stat);
224
225 BUG_ON(HWGROUP(drive)->handler != NULL);
226 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
227 return ide_started;
228 }
229
230 /*
231 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
232 */
233 static ide_startstop_t recal_intr(ide_drive_t *drive)
234 {
235 ide_hwif_t *hwif = HWIF(drive);
236 u8 stat;
237
238 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
239 return ide_error(drive, "recal_intr", stat);
240 return ide_stopped;
241 }
242
243 /*
244 * Handler for commands without a data phase
245 */
246 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
247 {
248 ide_task_t *args = HWGROUP(drive)->rq->special;
249 ide_hwif_t *hwif = HWIF(drive);
250 u8 stat;
251
252 local_irq_enable_in_hardirq();
253 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
254 return ide_error(drive, "task_no_data_intr", stat);
255 /* calls ide_end_drive_cmd */
256 }
257 if (args)
258 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
259
260 return ide_stopped;
261 }
262
263 u8 wait_drive_not_busy(ide_drive_t *drive)
264 {
265 ide_hwif_t *hwif = HWIF(drive);
266 int retries;
267 u8 stat;
268
269 /*
270 * Last sector was transfered, wait until drive is ready.
271 * This can take up to 10 usec, but we will wait max 1 ms.
272 */
273 for (retries = 0; retries < 100; retries++) {
274 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
275 udelay(10);
276 else
277 break;
278 }
279
280 if (stat & BUSY_STAT)
281 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
282
283 return stat;
284 }
285
286 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
287 {
288 ide_hwif_t *hwif = drive->hwif;
289 struct scatterlist *sg = hwif->sg_table;
290 struct scatterlist *cursg = hwif->cursg;
291 struct page *page;
292 #ifdef CONFIG_HIGHMEM
293 unsigned long flags;
294 #endif
295 unsigned int offset;
296 u8 *buf;
297
298 cursg = hwif->cursg;
299 if (!cursg) {
300 cursg = sg;
301 hwif->cursg = sg;
302 }
303
304 page = sg_page(cursg);
305 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
306
307 /* get the current page and offset */
308 page = nth_page(page, (offset >> PAGE_SHIFT));
309 offset %= PAGE_SIZE;
310
311 #ifdef CONFIG_HIGHMEM
312 local_irq_save(flags);
313 #endif
314 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
315
316 hwif->nleft--;
317 hwif->cursg_ofs++;
318
319 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
320 hwif->cursg = sg_next(hwif->cursg);
321 hwif->cursg_ofs = 0;
322 }
323
324 /* do the actual data transfer */
325 if (write)
326 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
327 else
328 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
329
330 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
331 #ifdef CONFIG_HIGHMEM
332 local_irq_restore(flags);
333 #endif
334 }
335
336 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
337 {
338 unsigned int nsect;
339
340 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
341 while (nsect--)
342 ide_pio_sector(drive, write);
343 }
344
345 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
346 unsigned int write)
347 {
348 u8 saved_io_32bit = drive->io_32bit;
349
350 if (rq->bio) /* fs request */
351 rq->errors = 0;
352
353 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
354 ide_task_t *task = rq->special;
355
356 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
357 drive->io_32bit = 0;
358 }
359
360 touch_softlockup_watchdog();
361
362 switch (drive->hwif->data_phase) {
363 case TASKFILE_MULTI_IN:
364 case TASKFILE_MULTI_OUT:
365 ide_pio_multi(drive, write);
366 break;
367 default:
368 ide_pio_sector(drive, write);
369 break;
370 }
371
372 drive->io_32bit = saved_io_32bit;
373 }
374
375 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
376 const char *s, u8 stat)
377 {
378 if (rq->bio) {
379 ide_hwif_t *hwif = drive->hwif;
380 int sectors = hwif->nsect - hwif->nleft;
381
382 switch (hwif->data_phase) {
383 case TASKFILE_IN:
384 if (hwif->nleft)
385 break;
386 /* fall through */
387 case TASKFILE_OUT:
388 sectors--;
389 break;
390 case TASKFILE_MULTI_IN:
391 if (hwif->nleft)
392 break;
393 /* fall through */
394 case TASKFILE_MULTI_OUT:
395 sectors -= drive->mult_count;
396 default:
397 break;
398 }
399
400 if (sectors > 0) {
401 ide_driver_t *drv;
402
403 drv = *(ide_driver_t **)rq->rq_disk->private_data;
404 drv->end_request(drive, 1, sectors);
405 }
406 }
407 return ide_error(drive, s, stat);
408 }
409
410 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
411 {
412 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
413 u8 err = drive->hwif->INB(IDE_ERROR_REG);
414
415 ide_end_drive_cmd(drive, stat, err);
416 return;
417 }
418
419 if (rq->rq_disk) {
420 ide_driver_t *drv;
421
422 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
423 drv->end_request(drive, 1, rq->nr_sectors);
424 } else
425 ide_end_request(drive, 1, rq->nr_sectors);
426 }
427
428 /*
429 * Handler for command with PIO data-in phase (Read/Read Multiple).
430 */
431 static ide_startstop_t task_in_intr(ide_drive_t *drive)
432 {
433 ide_hwif_t *hwif = drive->hwif;
434 struct request *rq = HWGROUP(drive)->rq;
435 u8 stat = hwif->INB(IDE_STATUS_REG);
436
437 /* new way for dealing with premature shared PCI interrupts */
438 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
439 if (stat & (ERR_STAT | DRQ_STAT))
440 return task_error(drive, rq, __FUNCTION__, stat);
441 /* No data yet, so wait for another IRQ. */
442 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
443 return ide_started;
444 }
445
446 ide_pio_datablock(drive, rq, 0);
447
448 /* If it was the last datablock check status and finish transfer. */
449 if (!hwif->nleft) {
450 stat = wait_drive_not_busy(drive);
451 if (!OK_STAT(stat, 0, BAD_STAT))
452 return task_error(drive, rq, __FUNCTION__, stat);
453 task_end_request(drive, rq, stat);
454 return ide_stopped;
455 }
456
457 /* Still data left to transfer. */
458 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
459
460 return ide_started;
461 }
462
463 /*
464 * Handler for command with PIO data-out phase (Write/Write Multiple).
465 */
466 static ide_startstop_t task_out_intr (ide_drive_t *drive)
467 {
468 ide_hwif_t *hwif = drive->hwif;
469 struct request *rq = HWGROUP(drive)->rq;
470 u8 stat = hwif->INB(IDE_STATUS_REG);
471
472 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
473 return task_error(drive, rq, __FUNCTION__, stat);
474
475 /* Deal with unexpected ATA data phase. */
476 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
477 return task_error(drive, rq, __FUNCTION__, stat);
478
479 if (!hwif->nleft) {
480 task_end_request(drive, rq, stat);
481 return ide_stopped;
482 }
483
484 /* Still data left to transfer. */
485 ide_pio_datablock(drive, rq, 1);
486 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
487
488 return ide_started;
489 }
490
491 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
492 {
493 ide_startstop_t startstop;
494
495 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
496 drive->bad_wstat, WAIT_DRQ)) {
497 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
498 drive->name,
499 drive->hwif->data_phase ? "MULT" : "",
500 drive->addressing ? "_EXT" : "");
501 return startstop;
502 }
503
504 if (!drive->unmask)
505 local_irq_disable();
506
507 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
508 ide_pio_datablock(drive, rq, 1);
509
510 return ide_started;
511 }
512
513 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
514 {
515 struct request rq;
516
517 memset(&rq, 0, sizeof(rq));
518 rq.ref_count = 1;
519 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
520 rq.buffer = buf;
521
522 /*
523 * (ks) We transfer currently only whole sectors.
524 * This is suffient for now. But, it would be great,
525 * if we would find a solution to transfer any size.
526 * To support special commands like READ LONG.
527 */
528 rq.hard_nr_sectors = rq.nr_sectors = nsect;
529 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
530
531 if (task->tf_flags & IDE_TFLAG_WRITE)
532 rq.cmd_flags |= REQ_RW;
533
534 rq.special = task;
535 task->rq = &rq;
536
537 return ide_do_drive_cmd(drive, &rq, ide_wait);
538 }
539
540 EXPORT_SYMBOL(ide_raw_taskfile);
541
542 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
543 {
544 task->data_phase = TASKFILE_NO_DATA;
545
546 return ide_raw_taskfile(drive, task, NULL, 0);
547 }
548 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
549
550 #ifdef CONFIG_IDE_TASK_IOCTL
551 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
552 {
553 ide_task_request_t *req_task;
554 ide_task_t args;
555 u8 *outbuf = NULL;
556 u8 *inbuf = NULL;
557 u8 *data_buf = NULL;
558 int err = 0;
559 int tasksize = sizeof(struct ide_task_request_s);
560 unsigned int taskin = 0;
561 unsigned int taskout = 0;
562 u16 nsect = 0;
563 char __user *buf = (char __user *)arg;
564
565 // printk("IDE Taskfile ...\n");
566
567 req_task = kzalloc(tasksize, GFP_KERNEL);
568 if (req_task == NULL) return -ENOMEM;
569 if (copy_from_user(req_task, buf, tasksize)) {
570 kfree(req_task);
571 return -EFAULT;
572 }
573
574 taskout = req_task->out_size;
575 taskin = req_task->in_size;
576
577 if (taskin > 65536 || taskout > 65536) {
578 err = -EINVAL;
579 goto abort;
580 }
581
582 if (taskout) {
583 int outtotal = tasksize;
584 outbuf = kzalloc(taskout, GFP_KERNEL);
585 if (outbuf == NULL) {
586 err = -ENOMEM;
587 goto abort;
588 }
589 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
590 err = -EFAULT;
591 goto abort;
592 }
593 }
594
595 if (taskin) {
596 int intotal = tasksize + taskout;
597 inbuf = kzalloc(taskin, GFP_KERNEL);
598 if (inbuf == NULL) {
599 err = -ENOMEM;
600 goto abort;
601 }
602 if (copy_from_user(inbuf, buf + intotal, taskin)) {
603 err = -EFAULT;
604 goto abort;
605 }
606 }
607
608 memset(&args, 0, sizeof(ide_task_t));
609
610 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
611 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
612
613 args.data_phase = req_task->data_phase;
614
615 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
616 IDE_TFLAG_IN_TF;
617 if (drive->addressing == 1)
618 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
619
620 if (req_task->out_flags.all) {
621 args.tf_flags |= IDE_TFLAG_FLAGGED;
622
623 if (req_task->out_flags.b.data)
624 args.tf_flags |= IDE_TFLAG_OUT_DATA;
625
626 if (req_task->out_flags.b.nsector_hob)
627 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
628 if (req_task->out_flags.b.sector_hob)
629 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
630 if (req_task->out_flags.b.lcyl_hob)
631 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
632 if (req_task->out_flags.b.hcyl_hob)
633 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
634
635 if (req_task->out_flags.b.error_feature)
636 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
637 if (req_task->out_flags.b.nsector)
638 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
639 if (req_task->out_flags.b.sector)
640 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
641 if (req_task->out_flags.b.lcyl)
642 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
643 if (req_task->out_flags.b.hcyl)
644 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
645 } else {
646 args.tf_flags |= IDE_TFLAG_OUT_TF;
647 if (args.tf_flags & IDE_TFLAG_LBA48)
648 args.tf_flags |= IDE_TFLAG_OUT_HOB;
649 }
650
651 if (req_task->in_flags.b.data)
652 args.tf_flags |= IDE_TFLAG_IN_DATA;
653
654 switch(req_task->data_phase) {
655 case TASKFILE_MULTI_OUT:
656 if (!drive->mult_count) {
657 /* (hs): give up if multcount is not set */
658 printk(KERN_ERR "%s: %s Multimode Write " \
659 "multcount is not set\n",
660 drive->name, __FUNCTION__);
661 err = -EPERM;
662 goto abort;
663 }
664 /* fall through */
665 case TASKFILE_OUT:
666 /* fall through */
667 case TASKFILE_OUT_DMAQ:
668 case TASKFILE_OUT_DMA:
669 nsect = taskout / SECTOR_SIZE;
670 data_buf = outbuf;
671 break;
672 case TASKFILE_MULTI_IN:
673 if (!drive->mult_count) {
674 /* (hs): give up if multcount is not set */
675 printk(KERN_ERR "%s: %s Multimode Read failure " \
676 "multcount is not set\n",
677 drive->name, __FUNCTION__);
678 err = -EPERM;
679 goto abort;
680 }
681 /* fall through */
682 case TASKFILE_IN:
683 /* fall through */
684 case TASKFILE_IN_DMAQ:
685 case TASKFILE_IN_DMA:
686 nsect = taskin / SECTOR_SIZE;
687 data_buf = inbuf;
688 break;
689 case TASKFILE_NO_DATA:
690 break;
691 default:
692 err = -EFAULT;
693 goto abort;
694 }
695
696 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
697 nsect = 0;
698 else if (!nsect) {
699 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
700
701 if (!nsect) {
702 printk(KERN_ERR "%s: in/out command without data\n",
703 drive->name);
704 err = -EFAULT;
705 goto abort;
706 }
707 }
708
709 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
710 args.tf_flags |= IDE_TFLAG_WRITE;
711
712 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
713
714 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
715 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
716
717 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
718 req_task->in_flags.all == 0) {
719 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
720 if (drive->addressing == 1)
721 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
722 }
723
724 if (copy_to_user(buf, req_task, tasksize)) {
725 err = -EFAULT;
726 goto abort;
727 }
728 if (taskout) {
729 int outtotal = tasksize;
730 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
731 err = -EFAULT;
732 goto abort;
733 }
734 }
735 if (taskin) {
736 int intotal = tasksize + taskout;
737 if (copy_to_user(buf + intotal, inbuf, taskin)) {
738 err = -EFAULT;
739 goto abort;
740 }
741 }
742 abort:
743 kfree(req_task);
744 kfree(outbuf);
745 kfree(inbuf);
746
747 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
748
749 return err;
750 }
751 #endif
752
753 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
754 {
755 u8 *buf = NULL;
756 int bufsize = 0, err = 0;
757 u8 args[4], xfer_rate = 0;
758 ide_task_t tfargs;
759 struct ide_taskfile *tf = &tfargs.tf;
760
761 if (NULL == (void *) arg) {
762 struct request rq;
763
764 ide_init_drive_cmd(&rq);
765 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
766
767 return ide_do_drive_cmd(drive, &rq, ide_wait);
768 }
769
770 if (copy_from_user(args, (void __user *)arg, 4))
771 return -EFAULT;
772
773 memset(&tfargs, 0, sizeof(ide_task_t));
774 tf->feature = args[2];
775 if (args[0] == WIN_SMART) {
776 tf->nsect = args[3];
777 tf->lbal = args[1];
778 tf->lbam = 0x4f;
779 tf->lbah = 0xc2;
780 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
781 } else {
782 tf->nsect = args[1];
783 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
784 IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
785 }
786 tf->command = args[0];
787 tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
788
789 if (args[3]) {
790 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
791 bufsize = SECTOR_WORDS * 4 * args[3];
792 buf = kzalloc(bufsize, GFP_KERNEL);
793 if (buf == NULL)
794 return -ENOMEM;
795 }
796
797 if (set_transfer(drive, &tfargs)) {
798 xfer_rate = args[1];
799 if (ide_ata66_check(drive, &tfargs))
800 goto abort;
801 }
802
803 err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
804
805 args[0] = tf->status;
806 args[1] = tf->error;
807 args[2] = tf->nsect;
808
809 if (!err && xfer_rate) {
810 /* active-retuning-calls future */
811 ide_set_xfer_rate(drive, xfer_rate);
812 ide_driveid_update(drive);
813 }
814 abort:
815 if (copy_to_user((void __user *)arg, &args, 4))
816 err = -EFAULT;
817 if (buf) {
818 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
819 err = -EFAULT;
820 kfree(buf);
821 }
822 return err;
823 }
824
825 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
826 {
827 void __user *p = (void __user *)arg;
828 int err = 0;
829 u8 args[7];
830 ide_task_t task;
831
832 if (copy_from_user(args, p, 7))
833 return -EFAULT;
834
835 memset(&task, 0, sizeof(task));
836 memcpy(&task.tf_array[7], &args[1], 6);
837 task.tf.command = args[0];
838 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
839
840 err = ide_no_data_taskfile(drive, &task);
841
842 args[0] = task.tf.command;
843 memcpy(&args[1], &task.tf_array[7], 6);
844
845 if (copy_to_user(p, args, 7))
846 err = -EFAULT;
847
848 return err;
849 }
Support for the Chinese Samsung S3C2440 based development boards