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[PATCH] m68k: introduce irq controller
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-taskfile.c
bloba839b2a8f6f485d17f30a1d861bbb7ecb7deda63
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/config.h>
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/string.h>
34 #include <linux/kernel.h>
35 #include <linux/timer.h>
36 #include <linux/mm.h>
37 #include <linux/sched.h>
38 #include <linux/interrupt.h>
39 #include <linux/major.h>
40 #include <linux/errno.h>
41 #include <linux/genhd.h>
42 #include <linux/blkpg.h>
43 #include <linux/slab.h>
44 #include <linux/pci.h>
45 #include <linux/delay.h>
46 #include <linux/hdreg.h>
47 #include <linux/ide.h>
48 #include <linux/bitops.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();
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 = 100;
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 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
251 udelay(10);
252
253 if (!retries)
254 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
255
256 return stat;
257 }
258
259 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
260 {
261 ide_hwif_t *hwif = drive->hwif;
262 struct scatterlist *sg = hwif->sg_table;
263 struct page *page;
264 #ifdef CONFIG_HIGHMEM
265 unsigned long flags;
266 #endif
267 unsigned int offset;
268 u8 *buf;
269
270 page = sg[hwif->cursg].page;
271 offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
272
273 /* get the current page and offset */
274 page = nth_page(page, (offset >> PAGE_SHIFT));
275 offset %= PAGE_SIZE;
276
277 #ifdef CONFIG_HIGHMEM
278 local_irq_save(flags);
279 #endif
280 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
281
282 hwif->nleft--;
283 hwif->cursg_ofs++;
284
285 if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
286 hwif->cursg++;
287 hwif->cursg_ofs = 0;
288 }
289
290 /* do the actual data transfer */
291 if (write)
292 taskfile_output_data(drive, buf, SECTOR_WORDS);
293 else
294 taskfile_input_data(drive, buf, SECTOR_WORDS);
295
296 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
297 #ifdef CONFIG_HIGHMEM
298 local_irq_restore(flags);
299 #endif
300 }
301
302 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
303 {
304 unsigned int nsect;
305
306 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
307 while (nsect--)
308 ide_pio_sector(drive, write);
309 }
310
311 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
312 unsigned int write)
313 {
314 if (rq->bio) /* fs request */
315 rq->errors = 0;
316
317 touch_softlockup_watchdog();
318
319 switch (drive->hwif->data_phase) {
320 case TASKFILE_MULTI_IN:
321 case TASKFILE_MULTI_OUT:
322 ide_pio_multi(drive, write);
323 break;
324 default:
325 ide_pio_sector(drive, write);
326 break;
327 }
328 }
329
330 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
331 const char *s, u8 stat)
332 {
333 if (rq->bio) {
334 ide_hwif_t *hwif = drive->hwif;
335 int sectors = hwif->nsect - hwif->nleft;
336
337 switch (hwif->data_phase) {
338 case TASKFILE_IN:
339 if (hwif->nleft)
340 break;
341 /* fall through */
342 case TASKFILE_OUT:
343 sectors--;
344 break;
345 case TASKFILE_MULTI_IN:
346 if (hwif->nleft)
347 break;
348 /* fall through */
349 case TASKFILE_MULTI_OUT:
350 sectors -= drive->mult_count;
351 default:
352 break;
353 }
354
355 if (sectors > 0) {
356 ide_driver_t *drv;
357
358 drv = *(ide_driver_t **)rq->rq_disk->private_data;
359 drv->end_request(drive, 1, sectors);
360 }
361 }
362 return ide_error(drive, s, stat);
363 }
364
365 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
366 {
367 if (rq->flags & REQ_DRIVE_TASKFILE) {
368 ide_task_t *task = rq->special;
369
370 if (task->tf_out_flags.all) {
371 u8 err = drive->hwif->INB(IDE_ERROR_REG);
372 ide_end_drive_cmd(drive, stat, err);
373 return;
374 }
375 }
376
377 if (rq->rq_disk) {
378 ide_driver_t *drv;
379
380 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
381 drv->end_request(drive, 1, rq->hard_nr_sectors);
382 } else
383 ide_end_request(drive, 1, rq->hard_nr_sectors);
384 }
385
386 /*
387 * Handler for command with PIO data-in phase (Read/Read Multiple).
388 */
389 ide_startstop_t task_in_intr (ide_drive_t *drive)
390 {
391 ide_hwif_t *hwif = drive->hwif;
392 struct request *rq = HWGROUP(drive)->rq;
393 u8 stat = hwif->INB(IDE_STATUS_REG);
394
395 /* new way for dealing with premature shared PCI interrupts */
396 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
397 if (stat & (ERR_STAT | DRQ_STAT))
398 return task_error(drive, rq, __FUNCTION__, stat);
399 /* No data yet, so wait for another IRQ. */
400 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
401 return ide_started;
402 }
403
404 ide_pio_datablock(drive, rq, 0);
405
406 /* If it was the last datablock check status and finish transfer. */
407 if (!hwif->nleft) {
408 stat = wait_drive_not_busy(drive);
409 if (!OK_STAT(stat, 0, BAD_R_STAT))
410 return task_error(drive, rq, __FUNCTION__, stat);
411 task_end_request(drive, rq, stat);
412 return ide_stopped;
413 }
414
415 /* Still data left to transfer. */
416 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
417
418 return ide_started;
419 }
420 EXPORT_SYMBOL(task_in_intr);
421
422 /*
423 * Handler for command with PIO data-out phase (Write/Write Multiple).
424 */
425 static ide_startstop_t task_out_intr (ide_drive_t *drive)
426 {
427 ide_hwif_t *hwif = drive->hwif;
428 struct request *rq = HWGROUP(drive)->rq;
429 u8 stat = hwif->INB(IDE_STATUS_REG);
430
431 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
432 return task_error(drive, rq, __FUNCTION__, stat);
433
434 /* Deal with unexpected ATA data phase. */
435 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
436 return task_error(drive, rq, __FUNCTION__, stat);
437
438 if (!hwif->nleft) {
439 task_end_request(drive, rq, stat);
440 return ide_stopped;
441 }
442
443 /* Still data left to transfer. */
444 ide_pio_datablock(drive, rq, 1);
445 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
446
447 return ide_started;
448 }
449
450 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
451 {
452 ide_startstop_t startstop;
453
454 if (ide_wait_stat(&startstop, drive, DATA_READY,
455 drive->bad_wstat, WAIT_DRQ)) {
456 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
457 drive->name,
458 drive->hwif->data_phase ? "MULT" : "",
459 drive->addressing ? "_EXT" : "");
460 return startstop;
461 }
462
463 if (!drive->unmask)
464 local_irq_disable();
465
466 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
467 ide_pio_datablock(drive, rq, 1);
468
469 return ide_started;
470 }
471 EXPORT_SYMBOL(pre_task_out_intr);
472
473 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
474 {
475 struct request rq;
476
477 memset(&rq, 0, sizeof(rq));
478 rq.flags = REQ_DRIVE_TASKFILE;
479 rq.buffer = buf;
480
481 /*
482 * (ks) We transfer currently only whole sectors.
483 * This is suffient for now. But, it would be great,
484 * if we would find a solution to transfer any size.
485 * To support special commands like READ LONG.
486 */
487 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
488 if (data_size == 0)
489 rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
490 else
491 rq.nr_sectors = data_size / SECTOR_SIZE;
492
493 if (!rq.nr_sectors) {
494 printk(KERN_ERR "%s: in/out command without data\n",
495 drive->name);
496 return -EFAULT;
497 }
498
499 rq.hard_nr_sectors = rq.nr_sectors;
500 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
501
502 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
503 rq.flags |= REQ_RW;
504 }
505
506 rq.special = args;
507 args->rq = &rq;
508 return ide_do_drive_cmd(drive, &rq, ide_wait);
509 }
510
511 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
512 {
513 return ide_diag_taskfile(drive, args, 0, buf);
514 }
515
516 EXPORT_SYMBOL(ide_raw_taskfile);
517
518 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
519 {
520 ide_task_request_t *req_task;
521 ide_task_t args;
522 u8 *outbuf = NULL;
523 u8 *inbuf = NULL;
524 task_ioreg_t *argsptr = args.tfRegister;
525 task_ioreg_t *hobsptr = args.hobRegister;
526 int err = 0;
527 int tasksize = sizeof(struct ide_task_request_s);
528 int taskin = 0;
529 int taskout = 0;
530 u8 io_32bit = drive->io_32bit;
531 char __user *buf = (char __user *)arg;
532
533 // printk("IDE Taskfile ...\n");
534
535 req_task = kzalloc(tasksize, GFP_KERNEL);
536 if (req_task == NULL) return -ENOMEM;
537 if (copy_from_user(req_task, buf, tasksize)) {
538 kfree(req_task);
539 return -EFAULT;
540 }
541
542 taskout = (int) req_task->out_size;
543 taskin = (int) req_task->in_size;
544
545 if (taskout) {
546 int outtotal = tasksize;
547 outbuf = kzalloc(taskout, GFP_KERNEL);
548 if (outbuf == NULL) {
549 err = -ENOMEM;
550 goto abort;
551 }
552 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
553 err = -EFAULT;
554 goto abort;
555 }
556 }
557
558 if (taskin) {
559 int intotal = tasksize + taskout;
560 inbuf = kzalloc(taskin, GFP_KERNEL);
561 if (inbuf == NULL) {
562 err = -ENOMEM;
563 goto abort;
564 }
565 if (copy_from_user(inbuf, buf + intotal, taskin)) {
566 err = -EFAULT;
567 goto abort;
568 }
569 }
570
571 memset(&args, 0, sizeof(ide_task_t));
572 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
573 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
574
575 args.tf_in_flags = req_task->in_flags;
576 args.tf_out_flags = req_task->out_flags;
577 args.data_phase = req_task->data_phase;
578 args.command_type = req_task->req_cmd;
579
580 drive->io_32bit = 0;
581 switch(req_task->data_phase) {
582 case TASKFILE_OUT_DMAQ:
583 case TASKFILE_OUT_DMA:
584 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
585 break;
586 case TASKFILE_IN_DMAQ:
587 case TASKFILE_IN_DMA:
588 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
589 break;
590 case TASKFILE_MULTI_OUT:
591 if (!drive->mult_count) {
592 /* (hs): give up if multcount is not set */
593 printk(KERN_ERR "%s: %s Multimode Write " \
594 "multcount is not set\n",
595 drive->name, __FUNCTION__);
596 err = -EPERM;
597 goto abort;
598 }
599 /* fall through */
600 case TASKFILE_OUT:
601 args.prehandler = &pre_task_out_intr;
602 args.handler = &task_out_intr;
603 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
604 break;
605 case TASKFILE_MULTI_IN:
606 if (!drive->mult_count) {
607 /* (hs): give up if multcount is not set */
608 printk(KERN_ERR "%s: %s Multimode Read failure " \
609 "multcount is not set\n",
610 drive->name, __FUNCTION__);
611 err = -EPERM;
612 goto abort;
613 }
614 /* fall through */
615 case TASKFILE_IN:
616 args.handler = &task_in_intr;
617 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
618 break;
619 case TASKFILE_NO_DATA:
620 args.handler = &task_no_data_intr;
621 err = ide_diag_taskfile(drive, &args, 0, NULL);
622 break;
623 default:
624 err = -EFAULT;
625 goto abort;
626 }
627
628 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
629 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
630 req_task->in_flags = args.tf_in_flags;
631 req_task->out_flags = args.tf_out_flags;
632
633 if (copy_to_user(buf, req_task, tasksize)) {
634 err = -EFAULT;
635 goto abort;
636 }
637 if (taskout) {
638 int outtotal = tasksize;
639 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
640 err = -EFAULT;
641 goto abort;
642 }
643 }
644 if (taskin) {
645 int intotal = tasksize + taskout;
646 if (copy_to_user(buf + intotal, inbuf, taskin)) {
647 err = -EFAULT;
648 goto abort;
649 }
650 }
651 abort:
652 kfree(req_task);
653 kfree(outbuf);
654 kfree(inbuf);
655
656 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
657
658 drive->io_32bit = io_32bit;
659
660 return err;
661 }
662
663 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
664 {
665 struct request rq;
666 u8 buffer[4];
667
668 if (!buf)
669 buf = buffer;
670 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
671 ide_init_drive_cmd(&rq);
672 rq.buffer = buf;
673 *buf++ = cmd;
674 *buf++ = nsect;
675 *buf++ = feature;
676 *buf++ = sectors;
677 return ide_do_drive_cmd(drive, &rq, ide_wait);
678 }
679
680 /*
681 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
682 */
683 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
684 {
685 int err = 0;
686 u8 args[4], *argbuf = args;
687 u8 xfer_rate = 0;
688 int argsize = 4;
689 ide_task_t tfargs;
690
691 if (NULL == (void *) arg) {
692 struct request rq;
693 ide_init_drive_cmd(&rq);
694 return ide_do_drive_cmd(drive, &rq, ide_wait);
695 }
696
697 if (copy_from_user(args, (void __user *)arg, 4))
698 return -EFAULT;
699
700 memset(&tfargs, 0, sizeof(ide_task_t));
701 tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
702 tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
703 tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
704 tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
705 tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
706 tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
707 tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
708
709 if (args[3]) {
710 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
711 argbuf = kzalloc(argsize, GFP_KERNEL);
712 if (argbuf == NULL)
713 return -ENOMEM;
714 }
715 if (set_transfer(drive, &tfargs)) {
716 xfer_rate = args[1];
717 if (ide_ata66_check(drive, &tfargs))
718 goto abort;
719 }
720
721 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
722
723 if (!err && xfer_rate) {
724 /* active-retuning-calls future */
725 ide_set_xfer_rate(drive, xfer_rate);
726 ide_driveid_update(drive);
727 }
728 abort:
729 if (copy_to_user((void __user *)arg, argbuf, argsize))
730 err = -EFAULT;
731 if (argsize > 4)
732 kfree(argbuf);
733 return err;
734 }
735
736 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
737 {
738 struct request rq;
739
740 ide_init_drive_cmd(&rq);
741 rq.flags = REQ_DRIVE_TASK;
742 rq.buffer = buf;
743 return ide_do_drive_cmd(drive, &rq, ide_wait);
744 }
745
746 /*
747 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
748 */
749 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
750 {
751 void __user *p = (void __user *)arg;
752 int err = 0;
753 u8 args[7], *argbuf = args;
754 int argsize = 7;
755
756 if (copy_from_user(args, p, 7))
757 return -EFAULT;
758 err = ide_wait_cmd_task(drive, argbuf);
759 if (copy_to_user(p, argbuf, argsize))
760 err = -EFAULT;
761 return err;
762 }
763
764 /*
765 * NOTICE: This is additions from IBM to provide a discrete interface,
766 * for selective taskregister access operations. Nice JOB Klaus!!!
767 * Glad to be able to work and co-develop this with you and IBM.
768 */
769 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
770 {
771 ide_hwif_t *hwif = HWIF(drive);
772 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
773 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
774
775 if (task->data_phase == TASKFILE_MULTI_IN ||
776 task->data_phase == TASKFILE_MULTI_OUT) {
777 if (!drive->mult_count) {
778 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
779 return ide_stopped;
780 }
781 }
782
783 /*
784 * (ks) Check taskfile in flags.
785 * If set, then execute as it is defined.
786 * If not set, then define default settings.
787 * The default values are:
788 * read all taskfile registers (except data)
789 * read the hob registers (sector, nsector, lcyl, hcyl)
790 */
791 if (task->tf_in_flags.all == 0) {
792 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
793 if (drive->addressing == 1)
794 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
795 }
796
797 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
798 if (IDE_CONTROL_REG)
799 /* clear nIEN */
800 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
801 SELECT_MASK(drive, 0);
802
803 if (task->tf_out_flags.b.data) {
804 u16 data = taskfile->data + (hobfile->data << 8);
805 hwif->OUTW(data, IDE_DATA_REG);
806 }
807
808 /* (ks) send hob registers first */
809 if (task->tf_out_flags.b.nsector_hob)
810 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
811 if (task->tf_out_flags.b.sector_hob)
812 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
813 if (task->tf_out_flags.b.lcyl_hob)
814 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
815 if (task->tf_out_flags.b.hcyl_hob)
816 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
817
818 /* (ks) Send now the standard registers */
819 if (task->tf_out_flags.b.error_feature)
820 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
821 /* refers to number of sectors to transfer */
822 if (task->tf_out_flags.b.nsector)
823 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
824 /* refers to sector offset or start sector */
825 if (task->tf_out_flags.b.sector)
826 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
827 if (task->tf_out_flags.b.lcyl)
828 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
829 if (task->tf_out_flags.b.hcyl)
830 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
831
832 /*
833 * (ks) In the flagged taskfile approch, we will use all specified
834 * registers and the register value will not be changed, except the
835 * select bit (master/slave) in the drive_head register. We must make
836 * sure that the desired drive is selected.
837 */
838 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
839 switch(task->data_phase) {
840
841 case TASKFILE_OUT_DMAQ:
842 case TASKFILE_OUT_DMA:
843 case TASKFILE_IN_DMAQ:
844 case TASKFILE_IN_DMA:
845 hwif->dma_setup(drive);
846 hwif->dma_exec_cmd(drive, taskfile->command);
847 hwif->dma_start(drive);
848 break;
849
850 default:
851 if (task->handler == NULL)
852 return ide_stopped;
853
854 /* Issue the command */
855 if (task->prehandler) {
856 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
857 ndelay(400); /* FIXME */
858 return task->prehandler(drive, task->rq);
859 }
860 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
861 }
862
863 return ide_started;
864 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree