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IDE: sg chaining support
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ide / ide-taskfile.c
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 * Problems to be fixed because of BH interface or the lack therefore.
13 *
14 * Fill me in stupid !!!
15 *
16 * HOST:
17 * General refers to the Controller and Driver "pair".
18 * DATA HANDLER:
19 * Under the context of Linux it generally refers to an interrupt handler.
20 * However, it correctly describes the 'HOST'
21 * DATA BLOCK:
22 * The amount of data needed to be transfered as predefined in the
23 * setup of the device.
24 * STORAGE ATOMIC:
25 * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as
26 * small as a single sector or as large as the entire command block
27 * request.
28 */
29
30 #include <linux/module.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/kernel.h>
34 #include <linux/timer.h>
35 #include <linux/mm.h>
36 #include <linux/sched.h>
37 #include <linux/interrupt.h>
38 #include <linux/major.h>
39 #include <linux/errno.h>
40 #include <linux/genhd.h>
41 #include <linux/blkpg.h>
42 #include <linux/slab.h>
43 #include <linux/pci.h>
44 #include <linux/delay.h>
45 #include <linux/hdreg.h>
46 #include <linux/ide.h>
47 #include <linux/bitops.h>
48 #include <linux/scatterlist.h>
49
50 #include <asm/byteorder.h>
51 #include <asm/irq.h>
52 #include <asm/uaccess.h>
53 #include <asm/io.h>
54
55 static void ata_bswap_data (void *buffer, int wcount)
56 {
57 u16 *p = buffer;
58
59 while (wcount--) {
60 *p = *p << 8 | *p >> 8; p++;
61 *p = *p << 8 | *p >> 8; p++;
62 }
63 }
64
65 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
66 {
67 HWIF(drive)->ata_input_data(drive, buffer, wcount);
68 if (drive->bswap)
69 ata_bswap_data(buffer, wcount);
70 }
71
72 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
73 {
74 if (drive->bswap) {
75 ata_bswap_data(buffer, wcount);
76 HWIF(drive)->ata_output_data(drive, buffer, wcount);
77 ata_bswap_data(buffer, wcount);
78 } else {
79 HWIF(drive)->ata_output_data(drive, buffer, wcount);
80 }
81 }
82
83 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
84 {
85 ide_task_t args;
86 memset(&args, 0, sizeof(ide_task_t));
87 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
88 if (drive->media == ide_disk)
89 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY;
90 else
91 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY;
92 args.command_type = IDE_DRIVE_TASK_IN;
93 args.data_phase = TASKFILE_IN;
94 args.handler = &task_in_intr;
95 return ide_raw_taskfile(drive, &args, buf);
96 }
97
98 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
99 {
100 ide_hwif_t *hwif = HWIF(drive);
101 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
102 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
103 u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
104
105 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
106 if (IDE_CONTROL_REG) {
107 /* clear nIEN */
108 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
109 }
110 SELECT_MASK(drive, 0);
111
112 if (drive->addressing == 1) {
113 hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
114 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
115 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
116 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
117 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
118 }
119
120 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
121 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
122 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
123 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
124 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
125
126 hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
127
128 if (task->handler != NULL) {
129 if (task->prehandler != NULL) {
130 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
131 ndelay(400); /* FIXME */
132 return task->prehandler(drive, task->rq);
133 }
134 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
135 return ide_started;
136 }
137
138 if (!drive->using_dma)
139 return ide_stopped;
140
141 switch (taskfile->command) {
142 case WIN_WRITEDMA_ONCE:
143 case WIN_WRITEDMA:
144 case WIN_WRITEDMA_EXT:
145 case WIN_READDMA_ONCE:
146 case WIN_READDMA:
147 case WIN_READDMA_EXT:
148 case WIN_IDENTIFY_DMA:
149 if (!hwif->dma_setup(drive)) {
150 hwif->dma_exec_cmd(drive, taskfile->command);
151 hwif->dma_start(drive);
152 return ide_started;
153 }
154 break;
155 default:
156 if (task->handler == NULL)
157 return ide_stopped;
158 }
159
160 return ide_stopped;
161 }
162
163 /*
164 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
165 */
166 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
167 {
168 ide_hwif_t *hwif = HWIF(drive);
169 u8 stat;
170
171 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
172 drive->mult_count = drive->mult_req;
173 } else {
174 drive->mult_req = drive->mult_count = 0;
175 drive->special.b.recalibrate = 1;
176 (void) ide_dump_status(drive, "set_multmode", stat);
177 }
178 return ide_stopped;
179 }
180
181 /*
182 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
183 */
184 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
185 {
186 ide_hwif_t *hwif = HWIF(drive);
187 int retries = 5;
188 u8 stat;
189
190 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
191 udelay(10);
192
193 if (OK_STAT(stat, READY_STAT, BAD_STAT))
194 return ide_stopped;
195
196 if (stat & (ERR_STAT|DRQ_STAT))
197 return ide_error(drive, "set_geometry_intr", stat);
198
199 BUG_ON(HWGROUP(drive)->handler != NULL);
200 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
201 return ide_started;
202 }
203
204 /*
205 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
206 */
207 ide_startstop_t recal_intr (ide_drive_t *drive)
208 {
209 ide_hwif_t *hwif = HWIF(drive);
210 u8 stat;
211
212 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
213 return ide_error(drive, "recal_intr", stat);
214 return ide_stopped;
215 }
216
217 /*
218 * Handler for commands without a data phase
219 */
220 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
221 {
222 ide_task_t *args = HWGROUP(drive)->rq->special;
223 ide_hwif_t *hwif = HWIF(drive);
224 u8 stat;
225
226 local_irq_enable_in_hardirq();
227 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
228 return ide_error(drive, "task_no_data_intr", stat);
229 /* calls ide_end_drive_cmd */
230 }
231 if (args)
232 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
233
234 return ide_stopped;
235 }
236
237 EXPORT_SYMBOL(task_no_data_intr);
238
239 static u8 wait_drive_not_busy(ide_drive_t *drive)
240 {
241 ide_hwif_t *hwif = HWIF(drive);
242 int retries;
243 u8 stat;
244
245 /*
246 * Last sector was transfered, wait until drive is ready.
247 * This can take up to 10 usec, but we will wait max 1 ms
248 * (drive_cmd_intr() waits that long).
249 */
250 for (retries = 0; retries < 100; retries++) {
251 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
252 udelay(10);
253 else
254 break;
255 }
256
257 if (stat & BUSY_STAT)
258 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
259
260 return stat;
261 }
262
263 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
264 {
265 ide_hwif_t *hwif = drive->hwif;
266 struct scatterlist *sg = hwif->sg_table;
267 struct scatterlist *cursg = hwif->cursg;
268 struct page *page;
269 #ifdef CONFIG_HIGHMEM
270 unsigned long flags;
271 #endif
272 unsigned int offset;
273 u8 *buf;
274
275 cursg = hwif->cursg;
276 if (!cursg) {
277 cursg = sg;
278 hwif->cursg = sg;
279 }
280
281 page = cursg->page;
282 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
283
284 /* get the current page and offset */
285 page = nth_page(page, (offset >> PAGE_SHIFT));
286 offset %= PAGE_SIZE;
287
288 #ifdef CONFIG_HIGHMEM
289 local_irq_save(flags);
290 #endif
291 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
292
293 hwif->nleft--;
294 hwif->cursg_ofs++;
295
296 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
297 hwif->cursg = sg_next(hwif->cursg);
298 hwif->cursg_ofs = 0;
299 }
300
301 /* do the actual data transfer */
302 if (write)
303 taskfile_output_data(drive, buf, SECTOR_WORDS);
304 else
305 taskfile_input_data(drive, buf, SECTOR_WORDS);
306
307 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
308 #ifdef CONFIG_HIGHMEM
309 local_irq_restore(flags);
310 #endif
311 }
312
313 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
314 {
315 unsigned int nsect;
316
317 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
318 while (nsect--)
319 ide_pio_sector(drive, write);
320 }
321
322 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
323 unsigned int write)
324 {
325 if (rq->bio) /* fs request */
326 rq->errors = 0;
327
328 touch_softlockup_watchdog();
329
330 switch (drive->hwif->data_phase) {
331 case TASKFILE_MULTI_IN:
332 case TASKFILE_MULTI_OUT:
333 ide_pio_multi(drive, write);
334 break;
335 default:
336 ide_pio_sector(drive, write);
337 break;
338 }
339 }
340
341 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
342 const char *s, u8 stat)
343 {
344 if (rq->bio) {
345 ide_hwif_t *hwif = drive->hwif;
346 int sectors = hwif->nsect - hwif->nleft;
347
348 switch (hwif->data_phase) {
349 case TASKFILE_IN:
350 if (hwif->nleft)
351 break;
352 /* fall through */
353 case TASKFILE_OUT:
354 sectors--;
355 break;
356 case TASKFILE_MULTI_IN:
357 if (hwif->nleft)
358 break;
359 /* fall through */
360 case TASKFILE_MULTI_OUT:
361 sectors -= drive->mult_count;
362 default:
363 break;
364 }
365
366 if (sectors > 0) {
367 ide_driver_t *drv;
368
369 drv = *(ide_driver_t **)rq->rq_disk->private_data;
370 drv->end_request(drive, 1, sectors);
371 }
372 }
373 return ide_error(drive, s, stat);
374 }
375
376 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
377 {
378 HWIF(drive)->cursg = NULL;
379
380 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
381 ide_task_t *task = rq->special;
382
383 if (task->tf_out_flags.all) {
384 u8 err = drive->hwif->INB(IDE_ERROR_REG);
385 ide_end_drive_cmd(drive, stat, err);
386 return;
387 }
388 }
389
390 if (rq->rq_disk) {
391 ide_driver_t *drv;
392
393 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
394 drv->end_request(drive, 1, rq->hard_nr_sectors);
395 } else
396 ide_end_request(drive, 1, rq->hard_nr_sectors);
397 }
398
399 /*
400 * Handler for command with PIO data-in phase (Read/Read Multiple).
401 */
402 ide_startstop_t task_in_intr (ide_drive_t *drive)
403 {
404 ide_hwif_t *hwif = drive->hwif;
405 struct request *rq = HWGROUP(drive)->rq;
406 u8 stat = hwif->INB(IDE_STATUS_REG);
407
408 /* new way for dealing with premature shared PCI interrupts */
409 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
410 if (stat & (ERR_STAT | DRQ_STAT))
411 return task_error(drive, rq, __FUNCTION__, stat);
412 /* No data yet, so wait for another IRQ. */
413 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
414 return ide_started;
415 }
416
417 ide_pio_datablock(drive, rq, 0);
418
419 /* If it was the last datablock check status and finish transfer. */
420 if (!hwif->nleft) {
421 stat = wait_drive_not_busy(drive);
422 if (!OK_STAT(stat, 0, BAD_R_STAT))
423 return task_error(drive, rq, __FUNCTION__, stat);
424 task_end_request(drive, rq, stat);
425 return ide_stopped;
426 }
427
428 /* Still data left to transfer. */
429 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
430
431 return ide_started;
432 }
433 EXPORT_SYMBOL(task_in_intr);
434
435 /*
436 * Handler for command with PIO data-out phase (Write/Write Multiple).
437 */
438 static ide_startstop_t task_out_intr (ide_drive_t *drive)
439 {
440 ide_hwif_t *hwif = drive->hwif;
441 struct request *rq = HWGROUP(drive)->rq;
442 u8 stat = hwif->INB(IDE_STATUS_REG);
443
444 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
445 return task_error(drive, rq, __FUNCTION__, stat);
446
447 /* Deal with unexpected ATA data phase. */
448 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
449 return task_error(drive, rq, __FUNCTION__, stat);
450
451 if (!hwif->nleft) {
452 task_end_request(drive, rq, stat);
453 return ide_stopped;
454 }
455
456 /* Still data left to transfer. */
457 ide_pio_datablock(drive, rq, 1);
458 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
459
460 return ide_started;
461 }
462
463 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
464 {
465 ide_startstop_t startstop;
466
467 if (ide_wait_stat(&startstop, drive, DATA_READY,
468 drive->bad_wstat, WAIT_DRQ)) {
469 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
470 drive->name,
471 drive->hwif->data_phase ? "MULT" : "",
472 drive->addressing ? "_EXT" : "");
473 return startstop;
474 }
475
476 if (!drive->unmask)
477 local_irq_disable();
478
479 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
480 ide_pio_datablock(drive, rq, 1);
481
482 return ide_started;
483 }
484 EXPORT_SYMBOL(pre_task_out_intr);
485
486 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
487 {
488 struct request rq;
489
490 memset(&rq, 0, sizeof(rq));
491 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
492 rq.buffer = buf;
493
494 /*
495 * (ks) We transfer currently only whole sectors.
496 * This is suffient for now. But, it would be great,
497 * if we would find a solution to transfer any size.
498 * To support special commands like READ LONG.
499 */
500 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
501 if (data_size == 0)
502 rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
503 else
504 rq.nr_sectors = data_size / SECTOR_SIZE;
505
506 if (!rq.nr_sectors) {
507 printk(KERN_ERR "%s: in/out command without data\n",
508 drive->name);
509 return -EFAULT;
510 }
511
512 rq.hard_nr_sectors = rq.nr_sectors;
513 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
514
515 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
516 rq.cmd_flags |= REQ_RW;
517 }
518
519 rq.special = args;
520 args->rq = &rq;
521 return ide_do_drive_cmd(drive, &rq, ide_wait);
522 }
523
524 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
525 {
526 return ide_diag_taskfile(drive, args, 0, buf);
527 }
528
529 EXPORT_SYMBOL(ide_raw_taskfile);
530
531 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
532 {
533 ide_task_request_t *req_task;
534 ide_task_t args;
535 u8 *outbuf = NULL;
536 u8 *inbuf = NULL;
537 task_ioreg_t *argsptr = args.tfRegister;
538 task_ioreg_t *hobsptr = args.hobRegister;
539 int err = 0;
540 int tasksize = sizeof(struct ide_task_request_s);
541 unsigned int taskin = 0;
542 unsigned int taskout = 0;
543 u8 io_32bit = drive->io_32bit;
544 char __user *buf = (char __user *)arg;
545
546 // printk("IDE Taskfile ...\n");
547
548 req_task = kzalloc(tasksize, GFP_KERNEL);
549 if (req_task == NULL) return -ENOMEM;
550 if (copy_from_user(req_task, buf, tasksize)) {
551 kfree(req_task);
552 return -EFAULT;
553 }
554
555 taskout = req_task->out_size;
556 taskin = req_task->in_size;
557
558 if (taskin > 65536 || taskout > 65536) {
559 err = -EINVAL;
560 goto abort;
561 }
562
563 if (taskout) {
564 int outtotal = tasksize;
565 outbuf = kzalloc(taskout, GFP_KERNEL);
566 if (outbuf == NULL) {
567 err = -ENOMEM;
568 goto abort;
569 }
570 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
571 err = -EFAULT;
572 goto abort;
573 }
574 }
575
576 if (taskin) {
577 int intotal = tasksize + taskout;
578 inbuf = kzalloc(taskin, GFP_KERNEL);
579 if (inbuf == NULL) {
580 err = -ENOMEM;
581 goto abort;
582 }
583 if (copy_from_user(inbuf, buf + intotal, taskin)) {
584 err = -EFAULT;
585 goto abort;
586 }
587 }
588
589 memset(&args, 0, sizeof(ide_task_t));
590 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
591 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
592
593 args.tf_in_flags = req_task->in_flags;
594 args.tf_out_flags = req_task->out_flags;
595 args.data_phase = req_task->data_phase;
596 args.command_type = req_task->req_cmd;
597
598 drive->io_32bit = 0;
599 switch(req_task->data_phase) {
600 case TASKFILE_OUT_DMAQ:
601 case TASKFILE_OUT_DMA:
602 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
603 break;
604 case TASKFILE_IN_DMAQ:
605 case TASKFILE_IN_DMA:
606 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
607 break;
608 case TASKFILE_MULTI_OUT:
609 if (!drive->mult_count) {
610 /* (hs): give up if multcount is not set */
611 printk(KERN_ERR "%s: %s Multimode Write " \
612 "multcount is not set\n",
613 drive->name, __FUNCTION__);
614 err = -EPERM;
615 goto abort;
616 }
617 /* fall through */
618 case TASKFILE_OUT:
619 args.prehandler = &pre_task_out_intr;
620 args.handler = &task_out_intr;
621 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
622 break;
623 case TASKFILE_MULTI_IN:
624 if (!drive->mult_count) {
625 /* (hs): give up if multcount is not set */
626 printk(KERN_ERR "%s: %s Multimode Read failure " \
627 "multcount is not set\n",
628 drive->name, __FUNCTION__);
629 err = -EPERM;
630 goto abort;
631 }
632 /* fall through */
633 case TASKFILE_IN:
634 args.handler = &task_in_intr;
635 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
636 break;
637 case TASKFILE_NO_DATA:
638 args.handler = &task_no_data_intr;
639 err = ide_diag_taskfile(drive, &args, 0, NULL);
640 break;
641 default:
642 err = -EFAULT;
643 goto abort;
644 }
645
646 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
647 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
648 req_task->in_flags = args.tf_in_flags;
649 req_task->out_flags = args.tf_out_flags;
650
651 if (copy_to_user(buf, req_task, tasksize)) {
652 err = -EFAULT;
653 goto abort;
654 }
655 if (taskout) {
656 int outtotal = tasksize;
657 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
658 err = -EFAULT;
659 goto abort;
660 }
661 }
662 if (taskin) {
663 int intotal = tasksize + taskout;
664 if (copy_to_user(buf + intotal, inbuf, taskin)) {
665 err = -EFAULT;
666 goto abort;
667 }
668 }
669 abort:
670 kfree(req_task);
671 kfree(outbuf);
672 kfree(inbuf);
673
674 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
675
676 drive->io_32bit = io_32bit;
677
678 return err;
679 }
680
681 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
682 {
683 struct request rq;
684 u8 buffer[4];
685
686 if (!buf)
687 buf = buffer;
688 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
689 ide_init_drive_cmd(&rq);
690 rq.buffer = buf;
691 *buf++ = cmd;
692 *buf++ = nsect;
693 *buf++ = feature;
694 *buf++ = sectors;
695 return ide_do_drive_cmd(drive, &rq, ide_wait);
696 }
697
698 /*
699 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
700 */
701 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
702 {
703 int err = 0;
704 u8 args[4], *argbuf = args;
705 u8 xfer_rate = 0;
706 int argsize = 4;
707 ide_task_t tfargs;
708
709 if (NULL == (void *) arg) {
710 struct request rq;
711 ide_init_drive_cmd(&rq);
712 return ide_do_drive_cmd(drive, &rq, ide_wait);
713 }
714
715 if (copy_from_user(args, (void __user *)arg, 4))
716 return -EFAULT;
717
718 memset(&tfargs, 0, sizeof(ide_task_t));
719 tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
720 tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
721 tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
722 tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
723 tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
724 tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
725 tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
726
727 if (args[3]) {
728 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
729 argbuf = kzalloc(argsize, GFP_KERNEL);
730 if (argbuf == NULL)
731 return -ENOMEM;
732 }
733 if (set_transfer(drive, &tfargs)) {
734 xfer_rate = args[1];
735 if (ide_ata66_check(drive, &tfargs))
736 goto abort;
737 }
738
739 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
740
741 if (!err && xfer_rate) {
742 /* active-retuning-calls future */
743 ide_set_xfer_rate(drive, xfer_rate);
744 ide_driveid_update(drive);
745 }
746 abort:
747 if (copy_to_user((void __user *)arg, argbuf, argsize))
748 err = -EFAULT;
749 if (argsize > 4)
750 kfree(argbuf);
751 return err;
752 }
753
754 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
755 {
756 struct request rq;
757
758 ide_init_drive_cmd(&rq);
759 rq.cmd_type = REQ_TYPE_ATA_TASK;
760 rq.buffer = buf;
761 return ide_do_drive_cmd(drive, &rq, ide_wait);
762 }
763
764 /*
765 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
766 */
767 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
768 {
769 void __user *p = (void __user *)arg;
770 int err = 0;
771 u8 args[7], *argbuf = args;
772 int argsize = 7;
773
774 if (copy_from_user(args, p, 7))
775 return -EFAULT;
776 err = ide_wait_cmd_task(drive, argbuf);
777 if (copy_to_user(p, argbuf, argsize))
778 err = -EFAULT;
779 return err;
780 }
781
782 /*
783 * NOTICE: This is additions from IBM to provide a discrete interface,
784 * for selective taskregister access operations. Nice JOB Klaus!!!
785 * Glad to be able to work and co-develop this with you and IBM.
786 */
787 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
788 {
789 ide_hwif_t *hwif = HWIF(drive);
790 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
791 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
792
793 if (task->data_phase == TASKFILE_MULTI_IN ||
794 task->data_phase == TASKFILE_MULTI_OUT) {
795 if (!drive->mult_count) {
796 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
797 return ide_stopped;
798 }
799 }
800
801 /*
802 * (ks) Check taskfile in flags.
803 * If set, then execute as it is defined.
804 * If not set, then define default settings.
805 * The default values are:
806 * read all taskfile registers (except data)
807 * read the hob registers (sector, nsector, lcyl, hcyl)
808 */
809 if (task->tf_in_flags.all == 0) {
810 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
811 if (drive->addressing == 1)
812 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
813 }
814
815 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
816 if (IDE_CONTROL_REG)
817 /* clear nIEN */
818 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
819 SELECT_MASK(drive, 0);
820
821 if (task->tf_out_flags.b.data) {
822 u16 data = taskfile->data + (hobfile->data << 8);
823 hwif->OUTW(data, IDE_DATA_REG);
824 }
825
826 /* (ks) send hob registers first */
827 if (task->tf_out_flags.b.nsector_hob)
828 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
829 if (task->tf_out_flags.b.sector_hob)
830 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
831 if (task->tf_out_flags.b.lcyl_hob)
832 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
833 if (task->tf_out_flags.b.hcyl_hob)
834 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
835
836 /* (ks) Send now the standard registers */
837 if (task->tf_out_flags.b.error_feature)
838 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
839 /* refers to number of sectors to transfer */
840 if (task->tf_out_flags.b.nsector)
841 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
842 /* refers to sector offset or start sector */
843 if (task->tf_out_flags.b.sector)
844 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
845 if (task->tf_out_flags.b.lcyl)
846 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
847 if (task->tf_out_flags.b.hcyl)
848 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
849
850 /*
851 * (ks) In the flagged taskfile approch, we will use all specified
852 * registers and the register value will not be changed, except the
853 * select bit (master/slave) in the drive_head register. We must make
854 * sure that the desired drive is selected.
855 */
856 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
857 switch(task->data_phase) {
858
859 case TASKFILE_OUT_DMAQ:
860 case TASKFILE_OUT_DMA:
861 case TASKFILE_IN_DMAQ:
862 case TASKFILE_IN_DMA:
863 hwif->dma_setup(drive);
864 hwif->dma_exec_cmd(drive, taskfile->command);
865 hwif->dma_start(drive);
866 break;
867
868 default:
869 if (task->handler == NULL)
870 return ide_stopped;
871
872 /* Issue the command */
873 if (task->prehandler) {
874 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
875 ndelay(400); /* FIXME */
876 return task->prehandler(drive, task->rq);
877 }
878 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
879 }
880
881 return ide_started;
882 }
kernel source for telekom puls (alcatel/mediatek)