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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / ide / ide-taskfile.c
blobaa06dafb74acb09dd4383e5a3c7421dcc13db2b7
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
49 #include <asm/byteorder.h>
50 #include <asm/irq.h>
51 #include <asm/uaccess.h>
52 #include <asm/io.h>
53
54 static void ata_bswap_data (void *buffer, int wcount)
55 {
56 u16 *p = buffer;
57
58 while (wcount--) {
59 *p = *p << 8 | *p >> 8; p++;
60 *p = *p << 8 | *p >> 8; p++;
61 }
62 }
63
64 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
65 {
66 HWIF(drive)->ata_input_data(drive, buffer, wcount);
67 if (drive->bswap)
68 ata_bswap_data(buffer, wcount);
69 }
70
71 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
72 {
73 if (drive->bswap) {
74 ata_bswap_data(buffer, wcount);
75 HWIF(drive)->ata_output_data(drive, buffer, wcount);
76 ata_bswap_data(buffer, wcount);
77 } else {
78 HWIF(drive)->ata_output_data(drive, buffer, wcount);
79 }
80 }
81
82 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
83 {
84 ide_task_t args;
85 memset(&args, 0, sizeof(ide_task_t));
86 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
87 if (drive->media == ide_disk)
88 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY;
89 else
90 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY;
91 args.command_type = IDE_DRIVE_TASK_IN;
92 args.data_phase = TASKFILE_IN;
93 args.handler = &task_in_intr;
94 return ide_raw_taskfile(drive, &args, buf);
95 }
96
97 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
98 {
99 ide_hwif_t *hwif = HWIF(drive);
100 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
101 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
102 u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
103
104 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
105 if (IDE_CONTROL_REG) {
106 /* clear nIEN */
107 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
108 }
109 SELECT_MASK(drive, 0);
110
111 if (drive->addressing == 1) {
112 hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
113 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
114 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
115 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
116 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
117 }
118
119 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
120 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
121 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
122 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
123 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
124
125 hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
126
127 if (task->handler != NULL) {
128 if (task->prehandler != NULL) {
129 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
130 ndelay(400); /* FIXME */
131 return task->prehandler(drive, task->rq);
132 }
133 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
134 return ide_started;
135 }
136
137 if (!drive->using_dma)
138 return ide_stopped;
139
140 switch (taskfile->command) {
141 case WIN_WRITEDMA_ONCE:
142 case WIN_WRITEDMA:
143 case WIN_WRITEDMA_EXT:
144 case WIN_READDMA_ONCE:
145 case WIN_READDMA:
146 case WIN_READDMA_EXT:
147 case WIN_IDENTIFY_DMA:
148 if (!hwif->dma_setup(drive)) {
149 hwif->dma_exec_cmd(drive, taskfile->command);
150 hwif->dma_start(drive);
151 return ide_started;
152 }
153 break;
154 default:
155 if (task->handler == NULL)
156 return ide_stopped;
157 }
158
159 return ide_stopped;
160 }
161
162 /*
163 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
164 */
165 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
166 {
167 ide_hwif_t *hwif = HWIF(drive);
168 u8 stat;
169
170 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
171 drive->mult_count = drive->mult_req;
172 } else {
173 drive->mult_req = drive->mult_count = 0;
174 drive->special.b.recalibrate = 1;
175 (void) ide_dump_status(drive, "set_multmode", stat);
176 }
177 return ide_stopped;
178 }
179
180 /*
181 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
182 */
183 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
184 {
185 ide_hwif_t *hwif = HWIF(drive);
186 int retries = 5;
187 u8 stat;
188
189 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
190 udelay(10);
191
192 if (OK_STAT(stat, READY_STAT, BAD_STAT))
193 return ide_stopped;
194
195 if (stat & (ERR_STAT|DRQ_STAT))
196 return ide_error(drive, "set_geometry_intr", stat);
197
198 BUG_ON(HWGROUP(drive)->handler != NULL);
199 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
200 return ide_started;
201 }
202
203 /*
204 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
205 */
206 ide_startstop_t recal_intr (ide_drive_t *drive)
207 {
208 ide_hwif_t *hwif = HWIF(drive);
209 u8 stat;
210
211 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
212 return ide_error(drive, "recal_intr", stat);
213 return ide_stopped;
214 }
215
216 /*
217 * Handler for commands without a data phase
218 */
219 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
220 {
221 ide_task_t *args = HWGROUP(drive)->rq->special;
222 ide_hwif_t *hwif = HWIF(drive);
223 u8 stat;
224
225 local_irq_enable_in_hardirq();
226 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
227 return ide_error(drive, "task_no_data_intr", stat);
228 /* calls ide_end_drive_cmd */
229 }
230 if (args)
231 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
232
233 return ide_stopped;
234 }
235
236 EXPORT_SYMBOL(task_no_data_intr);
237
238 static u8 wait_drive_not_busy(ide_drive_t *drive)
239 {
240 ide_hwif_t *hwif = HWIF(drive);
241 int retries;
242 u8 stat;
243
244 /*
245 * Last sector was transfered, wait until drive is ready.
246 * This can take up to 10 usec, but we will wait max 1 ms
247 * (drive_cmd_intr() waits that long).
248 */
249 for (retries = 0; retries < 100; retries++) {
250 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
251 udelay(10);
252 else
253 break;
254 }
255
256 if (stat & BUSY_STAT)
257 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
258
259 return stat;
260 }
261
262 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
263 {
264 ide_hwif_t *hwif = drive->hwif;
265 struct scatterlist *sg = hwif->sg_table;
266 struct page *page;
267 #ifdef CONFIG_HIGHMEM
268 unsigned long flags;
269 #endif
270 unsigned int offset;
271 u8 *buf;
272
273 page = sg[hwif->cursg].page;
274 offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
275
276 /* get the current page and offset */
277 page = nth_page(page, (offset >> PAGE_SHIFT));
278 offset %= PAGE_SIZE;
279
280 #ifdef CONFIG_HIGHMEM
281 local_irq_save(flags);
282 #endif
283 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
284
285 hwif->nleft--;
286 hwif->cursg_ofs++;
287
288 if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
289 hwif->cursg++;
290 hwif->cursg_ofs = 0;
291 }
292
293 /* do the actual data transfer */
294 if (write)
295 taskfile_output_data(drive, buf, SECTOR_WORDS);
296 else
297 taskfile_input_data(drive, buf, SECTOR_WORDS);
298
299 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
300 #ifdef CONFIG_HIGHMEM
301 local_irq_restore(flags);
302 #endif
303 }
304
305 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
306 {
307 unsigned int nsect;
308
309 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
310 while (nsect--)
311 ide_pio_sector(drive, write);
312 }
313
314 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
315 unsigned int write)
316 {
317 if (rq->bio) /* fs request */
318 rq->errors = 0;
319
320 touch_softlockup_watchdog();
321
322 switch (drive->hwif->data_phase) {
323 case TASKFILE_MULTI_IN:
324 case TASKFILE_MULTI_OUT:
325 ide_pio_multi(drive, write);
326 break;
327 default:
328 ide_pio_sector(drive, write);
329 break;
330 }
331 }
332
333 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
334 const char *s, u8 stat)
335 {
336 if (rq->bio) {
337 ide_hwif_t *hwif = drive->hwif;
338 int sectors = hwif->nsect - hwif->nleft;
339
340 switch (hwif->data_phase) {
341 case TASKFILE_IN:
342 if (hwif->nleft)
343 break;
344 /* fall through */
345 case TASKFILE_OUT:
346 sectors--;
347 break;
348 case TASKFILE_MULTI_IN:
349 if (hwif->nleft)
350 break;
351 /* fall through */
352 case TASKFILE_MULTI_OUT:
353 sectors -= drive->mult_count;
354 default:
355 break;
356 }
357
358 if (sectors > 0) {
359 ide_driver_t *drv;
360
361 drv = *(ide_driver_t **)rq->rq_disk->private_data;
362 drv->end_request(drive, 1, sectors);
363 }
364 }
365 return ide_error(drive, s, stat);
366 }
367
368 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
369 {
370 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
371 ide_task_t *task = rq->special;
372
373 if (task->tf_out_flags.all) {
374 u8 err = drive->hwif->INB(IDE_ERROR_REG);
375 ide_end_drive_cmd(drive, stat, err);
376 return;
377 }
378 }
379
380 if (rq->rq_disk) {
381 ide_driver_t *drv;
382
383 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
384 drv->end_request(drive, 1, rq->hard_nr_sectors);
385 } else
386 ide_end_request(drive, 1, rq->hard_nr_sectors);
387 }
388
389 /*
390 * Handler for command with PIO data-in phase (Read/Read Multiple).
391 */
392 ide_startstop_t task_in_intr (ide_drive_t *drive)
393 {
394 ide_hwif_t *hwif = drive->hwif;
395 struct request *rq = HWGROUP(drive)->rq;
396 u8 stat = hwif->INB(IDE_STATUS_REG);
397
398 /* new way for dealing with premature shared PCI interrupts */
399 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
400 if (stat & (ERR_STAT | DRQ_STAT))
401 return task_error(drive, rq, __FUNCTION__, stat);
402 /* No data yet, so wait for another IRQ. */
403 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
404 return ide_started;
405 }
406
407 ide_pio_datablock(drive, rq, 0);
408
409 /* If it was the last datablock check status and finish transfer. */
410 if (!hwif->nleft) {
411 stat = wait_drive_not_busy(drive);
412 if (!OK_STAT(stat, 0, BAD_R_STAT))
413 return task_error(drive, rq, __FUNCTION__, stat);
414 task_end_request(drive, rq, stat);
415 return ide_stopped;
416 }
417
418 /* Still data left to transfer. */
419 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
420
421 return ide_started;
422 }
423 EXPORT_SYMBOL(task_in_intr);
424
425 /*
426 * Handler for command with PIO data-out phase (Write/Write Multiple).
427 */
428 static ide_startstop_t task_out_intr (ide_drive_t *drive)
429 {
430 ide_hwif_t *hwif = drive->hwif;
431 struct request *rq = HWGROUP(drive)->rq;
432 u8 stat = hwif->INB(IDE_STATUS_REG);
433
434 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
435 return task_error(drive, rq, __FUNCTION__, stat);
436
437 /* Deal with unexpected ATA data phase. */
438 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
439 return task_error(drive, rq, __FUNCTION__, stat);
440
441 if (!hwif->nleft) {
442 task_end_request(drive, rq, stat);
443 return ide_stopped;
444 }
445
446 /* Still data left to transfer. */
447 ide_pio_datablock(drive, rq, 1);
448 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
449
450 return ide_started;
451 }
452
453 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
454 {
455 ide_startstop_t startstop;
456
457 if (ide_wait_stat(&startstop, drive, DATA_READY,
458 drive->bad_wstat, WAIT_DRQ)) {
459 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
460 drive->name,
461 drive->hwif->data_phase ? "MULT" : "",
462 drive->addressing ? "_EXT" : "");
463 return startstop;
464 }
465
466 if (!drive->unmask)
467 local_irq_disable();
468
469 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
470 ide_pio_datablock(drive, rq, 1);
471
472 return ide_started;
473 }
474 EXPORT_SYMBOL(pre_task_out_intr);
475
476 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
477 {
478 struct request rq;
479
480 memset(&rq, 0, sizeof(rq));
481 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
482 rq.buffer = buf;
483
484 /*
485 * (ks) We transfer currently only whole sectors.
486 * This is suffient for now. But, it would be great,
487 * if we would find a solution to transfer any size.
488 * To support special commands like READ LONG.
489 */
490 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
491 if (data_size == 0)
492 rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
493 else
494 rq.nr_sectors = data_size / SECTOR_SIZE;
495
496 if (!rq.nr_sectors) {
497 printk(KERN_ERR "%s: in/out command without data\n",
498 drive->name);
499 return -EFAULT;
500 }
501
502 rq.hard_nr_sectors = rq.nr_sectors;
503 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
504
505 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
506 rq.cmd_flags |= REQ_RW;
507 }
508
509 rq.special = args;
510 args->rq = &rq;
511 return ide_do_drive_cmd(drive, &rq, ide_wait);
512 }
513
514 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
515 {
516 return ide_diag_taskfile(drive, args, 0, buf);
517 }
518
519 EXPORT_SYMBOL(ide_raw_taskfile);
520
521 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
522 {
523 ide_task_request_t *req_task;
524 ide_task_t args;
525 u8 *outbuf = NULL;
526 u8 *inbuf = NULL;
527 task_ioreg_t *argsptr = args.tfRegister;
528 task_ioreg_t *hobsptr = args.hobRegister;
529 int err = 0;
530 int tasksize = sizeof(struct ide_task_request_s);
531 unsigned int taskin = 0;
532 unsigned int taskout = 0;
533 u8 io_32bit = drive->io_32bit;
534 char __user *buf = (char __user *)arg;
535
536 // printk("IDE Taskfile ...\n");
537
538 req_task = kzalloc(tasksize, GFP_KERNEL);
539 if (req_task == NULL) return -ENOMEM;
540 if (copy_from_user(req_task, buf, tasksize)) {
541 kfree(req_task);
542 return -EFAULT;
543 }
544
545 taskout = req_task->out_size;
546 taskin = req_task->in_size;
547
548 if (taskin > 65536 || taskout > 65536) {
549 err = -EINVAL;
550 goto abort;
551 }
552
553 if (taskout) {
554 int outtotal = tasksize;
555 outbuf = kzalloc(taskout, GFP_KERNEL);
556 if (outbuf == NULL) {
557 err = -ENOMEM;
558 goto abort;
559 }
560 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
561 err = -EFAULT;
562 goto abort;
563 }
564 }
565
566 if (taskin) {
567 int intotal = tasksize + taskout;
568 inbuf = kzalloc(taskin, GFP_KERNEL);
569 if (inbuf == NULL) {
570 err = -ENOMEM;
571 goto abort;
572 }
573 if (copy_from_user(inbuf, buf + intotal, taskin)) {
574 err = -EFAULT;
575 goto abort;
576 }
577 }
578
579 memset(&args, 0, sizeof(ide_task_t));
580 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
581 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
582
583 args.tf_in_flags = req_task->in_flags;
584 args.tf_out_flags = req_task->out_flags;
585 args.data_phase = req_task->data_phase;
586 args.command_type = req_task->req_cmd;
587
588 drive->io_32bit = 0;
589 switch(req_task->data_phase) {
590 case TASKFILE_OUT_DMAQ:
591 case TASKFILE_OUT_DMA:
592 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
593 break;
594 case TASKFILE_IN_DMAQ:
595 case TASKFILE_IN_DMA:
596 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
597 break;
598 case TASKFILE_MULTI_OUT:
599 if (!drive->mult_count) {
600 /* (hs): give up if multcount is not set */
601 printk(KERN_ERR "%s: %s Multimode Write " \
602 "multcount is not set\n",
603 drive->name, __FUNCTION__);
604 err = -EPERM;
605 goto abort;
606 }
607 /* fall through */
608 case TASKFILE_OUT:
609 args.prehandler = &pre_task_out_intr;
610 args.handler = &task_out_intr;
611 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
612 break;
613 case TASKFILE_MULTI_IN:
614 if (!drive->mult_count) {
615 /* (hs): give up if multcount is not set */
616 printk(KERN_ERR "%s: %s Multimode Read failure " \
617 "multcount is not set\n",
618 drive->name, __FUNCTION__);
619 err = -EPERM;
620 goto abort;
621 }
622 /* fall through */
623 case TASKFILE_IN:
624 args.handler = &task_in_intr;
625 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
626 break;
627 case TASKFILE_NO_DATA:
628 args.handler = &task_no_data_intr;
629 err = ide_diag_taskfile(drive, &args, 0, NULL);
630 break;
631 default:
632 err = -EFAULT;
633 goto abort;
634 }
635
636 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
637 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
638 req_task->in_flags = args.tf_in_flags;
639 req_task->out_flags = args.tf_out_flags;
640
641 if (copy_to_user(buf, req_task, tasksize)) {
642 err = -EFAULT;
643 goto abort;
644 }
645 if (taskout) {
646 int outtotal = tasksize;
647 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
648 err = -EFAULT;
649 goto abort;
650 }
651 }
652 if (taskin) {
653 int intotal = tasksize + taskout;
654 if (copy_to_user(buf + intotal, inbuf, taskin)) {
655 err = -EFAULT;
656 goto abort;
657 }
658 }
659 abort:
660 kfree(req_task);
661 kfree(outbuf);
662 kfree(inbuf);
663
664 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
665
666 drive->io_32bit = io_32bit;
667
668 return err;
669 }
670
671 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
672 {
673 struct request rq;
674 u8 buffer[4];
675
676 if (!buf)
677 buf = buffer;
678 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
679 ide_init_drive_cmd(&rq);
680 rq.buffer = buf;
681 *buf++ = cmd;
682 *buf++ = nsect;
683 *buf++ = feature;
684 *buf++ = sectors;
685 return ide_do_drive_cmd(drive, &rq, ide_wait);
686 }
687
688 /*
689 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
690 */
691 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
692 {
693 int err = 0;
694 u8 args[4], *argbuf = args;
695 u8 xfer_rate = 0;
696 int argsize = 4;
697 ide_task_t tfargs;
698
699 if (NULL == (void *) arg) {
700 struct request rq;
701 ide_init_drive_cmd(&rq);
702 return ide_do_drive_cmd(drive, &rq, ide_wait);
703 }
704
705 if (copy_from_user(args, (void __user *)arg, 4))
706 return -EFAULT;
707
708 memset(&tfargs, 0, sizeof(ide_task_t));
709 tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
710 tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
711 tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
712 tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
713 tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
714 tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
715 tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
716
717 if (args[3]) {
718 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
719 argbuf = kzalloc(argsize, GFP_KERNEL);
720 if (argbuf == NULL)
721 return -ENOMEM;
722 }
723 if (set_transfer(drive, &tfargs)) {
724 xfer_rate = args[1];
725 if (ide_ata66_check(drive, &tfargs))
726 goto abort;
727 }
728
729 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
730
731 if (!err && xfer_rate) {
732 /* active-retuning-calls future */
733 ide_set_xfer_rate(drive, xfer_rate);
734 ide_driveid_update(drive);
735 }
736 abort:
737 if (copy_to_user((void __user *)arg, argbuf, argsize))
738 err = -EFAULT;
739 if (argsize > 4)
740 kfree(argbuf);
741 return err;
742 }
743
744 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
745 {
746 struct request rq;
747
748 ide_init_drive_cmd(&rq);
749 rq.cmd_type = REQ_TYPE_ATA_TASK;
750 rq.buffer = buf;
751 return ide_do_drive_cmd(drive, &rq, ide_wait);
752 }
753
754 /*
755 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
756 */
757 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
758 {
759 void __user *p = (void __user *)arg;
760 int err = 0;
761 u8 args[7], *argbuf = args;
762 int argsize = 7;
763
764 if (copy_from_user(args, p, 7))
765 return -EFAULT;
766 err = ide_wait_cmd_task(drive, argbuf);
767 if (copy_to_user(p, argbuf, argsize))
768 err = -EFAULT;
769 return err;
770 }
771
772 /*
773 * NOTICE: This is additions from IBM to provide a discrete interface,
774 * for selective taskregister access operations. Nice JOB Klaus!!!
775 * Glad to be able to work and co-develop this with you and IBM.
776 */
777 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
778 {
779 ide_hwif_t *hwif = HWIF(drive);
780 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
781 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
782
783 if (task->data_phase == TASKFILE_MULTI_IN ||
784 task->data_phase == TASKFILE_MULTI_OUT) {
785 if (!drive->mult_count) {
786 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
787 return ide_stopped;
788 }
789 }
790
791 /*
792 * (ks) Check taskfile in flags.
793 * If set, then execute as it is defined.
794 * If not set, then define default settings.
795 * The default values are:
796 * read all taskfile registers (except data)
797 * read the hob registers (sector, nsector, lcyl, hcyl)
798 */
799 if (task->tf_in_flags.all == 0) {
800 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
801 if (drive->addressing == 1)
802 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
803 }
804
805 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
806 if (IDE_CONTROL_REG)
807 /* clear nIEN */
808 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
809 SELECT_MASK(drive, 0);
810
811 if (task->tf_out_flags.b.data) {
812 u16 data = taskfile->data + (hobfile->data << 8);
813 hwif->OUTW(data, IDE_DATA_REG);
814 }
815
816 /* (ks) send hob registers first */
817 if (task->tf_out_flags.b.nsector_hob)
818 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
819 if (task->tf_out_flags.b.sector_hob)
820 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
821 if (task->tf_out_flags.b.lcyl_hob)
822 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
823 if (task->tf_out_flags.b.hcyl_hob)
824 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
825
826 /* (ks) Send now the standard registers */
827 if (task->tf_out_flags.b.error_feature)
828 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
829 /* refers to number of sectors to transfer */
830 if (task->tf_out_flags.b.nsector)
831 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
832 /* refers to sector offset or start sector */
833 if (task->tf_out_flags.b.sector)
834 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
835 if (task->tf_out_flags.b.lcyl)
836 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
837 if (task->tf_out_flags.b.hcyl)
838 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
839
840 /*
841 * (ks) In the flagged taskfile approch, we will use all specified
842 * registers and the register value will not be changed, except the
843 * select bit (master/slave) in the drive_head register. We must make
844 * sure that the desired drive is selected.
845 */
846 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
847 switch(task->data_phase) {
848
849 case TASKFILE_OUT_DMAQ:
850 case TASKFILE_OUT_DMA:
851 case TASKFILE_IN_DMAQ:
852 case TASKFILE_IN_DMA:
853 hwif->dma_setup(drive);
854 hwif->dma_exec_cmd(drive, taskfile->command);
855 hwif->dma_start(drive);
856 break;
857
858 default:
859 if (task->handler == NULL)
860 return ide_stopped;
861
862 /* Issue the command */
863 if (task->prehandler) {
864 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
865 ndelay(400); /* FIXME */
866 return task->prehandler(drive, task->rq);
867 }
868 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
869 }
870
871 return ide_started;
872 }
Tomato firmware and modifications.