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[PATCH] ide: hotplug mark __devinit sc1200.c
[linux-2.6/mini2440.git] / drivers / ide / ide-taskfile.c
blobd04f62ab5de1991939a07f965c92bf6142370924
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/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 #define DEBUG_TASKFILE 0 /* unset when fixed */
55
56 static void ata_bswap_data (void *buffer, int wcount)
57 {
58 u16 *p = buffer;
59
60 while (wcount--) {
61 *p = *p << 8 | *p >> 8; p++;
62 *p = *p << 8 | *p >> 8; p++;
63 }
64 }
65
66 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
67 {
68 HWIF(drive)->ata_input_data(drive, buffer, wcount);
69 if (drive->bswap)
70 ata_bswap_data(buffer, wcount);
71 }
72
73 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
74 {
75 if (drive->bswap) {
76 ata_bswap_data(buffer, wcount);
77 HWIF(drive)->ata_output_data(drive, buffer, wcount);
78 ata_bswap_data(buffer, wcount);
79 } else {
80 HWIF(drive)->ata_output_data(drive, buffer, wcount);
81 }
82 }
83
84 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
85 {
86 ide_task_t args;
87 memset(&args, 0, sizeof(ide_task_t));
88 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
89 if (drive->media == ide_disk)
90 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY;
91 else
92 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY;
93 args.command_type = IDE_DRIVE_TASK_IN;
94 args.data_phase = TASKFILE_IN;
95 args.handler = &task_in_intr;
96 return ide_raw_taskfile(drive, &args, buf);
97 }
98
99 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
100 {
101 ide_hwif_t *hwif = HWIF(drive);
102 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
103 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
104 u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
105
106 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
107 if (IDE_CONTROL_REG) {
108 /* clear nIEN */
109 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
110 }
111 SELECT_MASK(drive, 0);
112
113 if (drive->addressing == 1) {
114 hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
115 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
116 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
117 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
118 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
119 }
120
121 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
122 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
123 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
124 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
125 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
126
127 hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
128
129 if (task->handler != NULL) {
130 if (task->prehandler != NULL) {
131 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
132 ndelay(400); /* FIXME */
133 return task->prehandler(drive, task->rq);
134 }
135 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
136 return ide_started;
137 }
138
139 if (!drive->using_dma)
140 return ide_stopped;
141
142 switch (taskfile->command) {
143 case WIN_WRITEDMA_ONCE:
144 case WIN_WRITEDMA:
145 case WIN_WRITEDMA_EXT:
146 case WIN_READDMA_ONCE:
147 case WIN_READDMA:
148 case WIN_READDMA_EXT:
149 case WIN_IDENTIFY_DMA:
150 if (!hwif->dma_setup(drive)) {
151 hwif->dma_exec_cmd(drive, taskfile->command);
152 hwif->dma_start(drive);
153 return ide_started;
154 }
155 break;
156 default:
157 if (task->handler == NULL)
158 return ide_stopped;
159 }
160
161 return ide_stopped;
162 }
163
164 EXPORT_SYMBOL(do_rw_taskfile);
165
166 /*
167 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
168 */
169 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
170 {
171 ide_hwif_t *hwif = HWIF(drive);
172 u8 stat;
173
174 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
175 drive->mult_count = drive->mult_req;
176 } else {
177 drive->mult_req = drive->mult_count = 0;
178 drive->special.b.recalibrate = 1;
179 (void) ide_dump_status(drive, "set_multmode", stat);
180 }
181 return ide_stopped;
182 }
183
184 /*
185 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
186 */
187 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
188 {
189 ide_hwif_t *hwif = HWIF(drive);
190 int retries = 5;
191 u8 stat;
192
193 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
194 udelay(10);
195
196 if (OK_STAT(stat, READY_STAT, BAD_STAT))
197 return ide_stopped;
198
199 if (stat & (ERR_STAT|DRQ_STAT))
200 return ide_error(drive, "set_geometry_intr", stat);
201
202 if (HWGROUP(drive)->handler != NULL)
203 BUG();
204 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
205 return ide_started;
206 }
207
208 /*
209 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
210 */
211 ide_startstop_t recal_intr (ide_drive_t *drive)
212 {
213 ide_hwif_t *hwif = HWIF(drive);
214 u8 stat;
215
216 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
217 return ide_error(drive, "recal_intr", stat);
218 return ide_stopped;
219 }
220
221 /*
222 * Handler for commands without a data phase
223 */
224 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
225 {
226 ide_task_t *args = HWGROUP(drive)->rq->special;
227 ide_hwif_t *hwif = HWIF(drive);
228 u8 stat;
229
230 local_irq_enable();
231 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
232 return ide_error(drive, "task_no_data_intr", stat);
233 /* calls ide_end_drive_cmd */
234 }
235 if (args)
236 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
237
238 return ide_stopped;
239 }
240
241 EXPORT_SYMBOL(task_no_data_intr);
242
243 static u8 wait_drive_not_busy(ide_drive_t *drive)
244 {
245 ide_hwif_t *hwif = HWIF(drive);
246 int retries = 100;
247 u8 stat;
248
249 /*
250 * Last sector was transfered, wait until drive is ready.
251 * This can take up to 10 usec, but we will wait max 1 ms
252 * (drive_cmd_intr() waits that long).
253 */
254 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
255 udelay(10);
256
257 if (!retries)
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 page *page;
268 #ifdef CONFIG_HIGHMEM
269 unsigned long flags;
270 #endif
271 unsigned int offset;
272 u8 *buf;
273
274 page = sg[hwif->cursg].page;
275 offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
276
277 /* get the current page and offset */
278 page = nth_page(page, (offset >> PAGE_SHIFT));
279 offset %= PAGE_SIZE;
280
281 #ifdef CONFIG_HIGHMEM
282 local_irq_save(flags);
283 #endif
284 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
285
286 hwif->nleft--;
287 hwif->cursg_ofs++;
288
289 if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
290 hwif->cursg++;
291 hwif->cursg_ofs = 0;
292 }
293
294 /* do the actual data transfer */
295 if (write)
296 taskfile_output_data(drive, buf, SECTOR_WORDS);
297 else
298 taskfile_input_data(drive, buf, SECTOR_WORDS);
299
300 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
301 #ifdef CONFIG_HIGHMEM
302 local_irq_restore(flags);
303 #endif
304 }
305
306 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
307 {
308 unsigned int nsect;
309
310 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
311 while (nsect--)
312 ide_pio_sector(drive, write);
313 }
314
315 static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
316 unsigned int write)
317 {
318 if (rq->bio) /* fs request */
319 rq->errors = 0;
320
321 switch (drive->hwif->data_phase) {
322 case TASKFILE_MULTI_IN:
323 case TASKFILE_MULTI_OUT:
324 ide_pio_multi(drive, write);
325 break;
326 default:
327 ide_pio_sector(drive, write);
328 break;
329 }
330 }
331
332 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
333 const char *s, u8 stat)
334 {
335 if (rq->bio) {
336 ide_hwif_t *hwif = drive->hwif;
337 int sectors = hwif->nsect - hwif->nleft;
338
339 switch (hwif->data_phase) {
340 case TASKFILE_IN:
341 if (hwif->nleft)
342 break;
343 /* fall through */
344 case TASKFILE_OUT:
345 sectors--;
346 break;
347 case TASKFILE_MULTI_IN:
348 if (hwif->nleft)
349 break;
350 /* fall through */
351 case TASKFILE_MULTI_OUT:
352 sectors -= drive->mult_count;
353 default:
354 break;
355 }
356
357 if (sectors > 0) {
358 ide_driver_t *drv;
359
360 drv = *(ide_driver_t **)rq->rq_disk->private_data;
361 drv->end_request(drive, 1, sectors);
362 }
363 }
364 return ide_error(drive, s, stat);
365 }
366
367 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
368 {
369 if (rq->flags & REQ_DRIVE_TASKFILE) {
370 ide_task_t *task = rq->special;
371
372 if (task->tf_out_flags.all) {
373 u8 err = drive->hwif->INB(IDE_ERROR_REG);
374 ide_end_drive_cmd(drive, stat, err);
375 return;
376 }
377 }
378
379 ide_end_request(drive, 1, rq->hard_nr_sectors);
380 }
381
382 /*
383 * Handler for command with PIO data-in phase (Read/Read Multiple).
384 */
385 ide_startstop_t task_in_intr (ide_drive_t *drive)
386 {
387 ide_hwif_t *hwif = drive->hwif;
388 struct request *rq = HWGROUP(drive)->rq;
389 u8 stat = hwif->INB(IDE_STATUS_REG);
390
391 /* new way for dealing with premature shared PCI interrupts */
392 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
393 if (stat & (ERR_STAT | DRQ_STAT))
394 return task_error(drive, rq, __FUNCTION__, stat);
395 /* No data yet, so wait for another IRQ. */
396 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
397 return ide_started;
398 }
399
400 ide_pio_datablock(drive, rq, 0);
401
402 /* If it was the last datablock check status and finish transfer. */
403 if (!hwif->nleft) {
404 stat = wait_drive_not_busy(drive);
405 if (!OK_STAT(stat, 0, BAD_R_STAT))
406 return task_error(drive, rq, __FUNCTION__, stat);
407 task_end_request(drive, rq, stat);
408 return ide_stopped;
409 }
410
411 /* Still data left to transfer. */
412 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
413
414 return ide_started;
415 }
416 EXPORT_SYMBOL(task_in_intr);
417
418 /*
419 * Handler for command with PIO data-out phase (Write/Write Multiple).
420 */
421 static ide_startstop_t task_out_intr (ide_drive_t *drive)
422 {
423 ide_hwif_t *hwif = drive->hwif;
424 struct request *rq = HWGROUP(drive)->rq;
425 u8 stat = hwif->INB(IDE_STATUS_REG);
426
427 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
428 return task_error(drive, rq, __FUNCTION__, stat);
429
430 /* Deal with unexpected ATA data phase. */
431 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
432 return task_error(drive, rq, __FUNCTION__, stat);
433
434 if (!hwif->nleft) {
435 task_end_request(drive, rq, stat);
436 return ide_stopped;
437 }
438
439 /* Still data left to transfer. */
440 ide_pio_datablock(drive, rq, 1);
441 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
442
443 return ide_started;
444 }
445
446 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
447 {
448 ide_startstop_t startstop;
449
450 if (ide_wait_stat(&startstop, drive, DATA_READY,
451 drive->bad_wstat, WAIT_DRQ)) {
452 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
453 drive->name,
454 drive->hwif->data_phase ? "MULT" : "",
455 drive->addressing ? "_EXT" : "");
456 return startstop;
457 }
458
459 if (!drive->unmask)
460 local_irq_disable();
461
462 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
463 ide_pio_datablock(drive, rq, 1);
464
465 return ide_started;
466 }
467 EXPORT_SYMBOL(pre_task_out_intr);
468
469 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
470 {
471 struct request rq;
472
473 memset(&rq, 0, sizeof(rq));
474 rq.flags = REQ_DRIVE_TASKFILE;
475 rq.buffer = buf;
476
477 /*
478 * (ks) We transfer currently only whole sectors.
479 * This is suffient for now. But, it would be great,
480 * if we would find a solution to transfer any size.
481 * To support special commands like READ LONG.
482 */
483 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
484 if (data_size == 0)
485 rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
486 else
487 rq.nr_sectors = data_size / SECTOR_SIZE;
488
489 if (!rq.nr_sectors) {
490 printk(KERN_ERR "%s: in/out command without data\n",
491 drive->name);
492 return -EFAULT;
493 }
494
495 rq.hard_nr_sectors = rq.nr_sectors;
496 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
497
498 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
499 rq.flags |= REQ_RW;
500 }
501
502 rq.special = args;
503 return ide_do_drive_cmd(drive, &rq, ide_wait);
504 }
505
506 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
507 {
508 return ide_diag_taskfile(drive, args, 0, buf);
509 }
510
511 EXPORT_SYMBOL(ide_raw_taskfile);
512
513 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
514 {
515 ide_task_request_t *req_task;
516 ide_task_t args;
517 u8 *outbuf = NULL;
518 u8 *inbuf = NULL;
519 task_ioreg_t *argsptr = args.tfRegister;
520 task_ioreg_t *hobsptr = args.hobRegister;
521 int err = 0;
522 int tasksize = sizeof(struct ide_task_request_s);
523 int taskin = 0;
524 int taskout = 0;
525 u8 io_32bit = drive->io_32bit;
526 char __user *buf = (char __user *)arg;
527
528 // printk("IDE Taskfile ...\n");
529
530 req_task = kmalloc(tasksize, GFP_KERNEL);
531 if (req_task == NULL) return -ENOMEM;
532 memset(req_task, 0, tasksize);
533 if (copy_from_user(req_task, buf, tasksize)) {
534 kfree(req_task);
535 return -EFAULT;
536 }
537
538 taskout = (int) req_task->out_size;
539 taskin = (int) req_task->in_size;
540
541 if (taskout) {
542 int outtotal = tasksize;
543 outbuf = kmalloc(taskout, GFP_KERNEL);
544 if (outbuf == NULL) {
545 err = -ENOMEM;
546 goto abort;
547 }
548 memset(outbuf, 0, taskout);
549 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
550 err = -EFAULT;
551 goto abort;
552 }
553 }
554
555 if (taskin) {
556 int intotal = tasksize + taskout;
557 inbuf = kmalloc(taskin, GFP_KERNEL);
558 if (inbuf == NULL) {
559 err = -ENOMEM;
560 goto abort;
561 }
562 memset(inbuf, 0, taskin);
563 if (copy_from_user(inbuf, buf + intotal, taskin)) {
564 err = -EFAULT;
565 goto abort;
566 }
567 }
568
569 memset(&args, 0, sizeof(ide_task_t));
570 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
571 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
572
573 args.tf_in_flags = req_task->in_flags;
574 args.tf_out_flags = req_task->out_flags;
575 args.data_phase = req_task->data_phase;
576 args.command_type = req_task->req_cmd;
577
578 drive->io_32bit = 0;
579 switch(req_task->data_phase) {
580 case TASKFILE_OUT_DMAQ:
581 case TASKFILE_OUT_DMA:
582 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
583 break;
584 case TASKFILE_IN_DMAQ:
585 case TASKFILE_IN_DMA:
586 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
587 break;
588 case TASKFILE_MULTI_OUT:
589 if (!drive->mult_count) {
590 /* (hs): give up if multcount is not set */
591 printk(KERN_ERR "%s: %s Multimode Write " \
592 "multcount is not set\n",
593 drive->name, __FUNCTION__);
594 err = -EPERM;
595 goto abort;
596 }
597 /* fall through */
598 case TASKFILE_OUT:
599 args.prehandler = &pre_task_out_intr;
600 args.handler = &task_out_intr;
601 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
602 break;
603 case TASKFILE_MULTI_IN:
604 if (!drive->mult_count) {
605 /* (hs): give up if multcount is not set */
606 printk(KERN_ERR "%s: %s Multimode Read failure " \
607 "multcount is not set\n",
608 drive->name, __FUNCTION__);
609 err = -EPERM;
610 goto abort;
611 }
612 /* fall through */
613 case TASKFILE_IN:
614 args.handler = &task_in_intr;
615 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
616 break;
617 case TASKFILE_NO_DATA:
618 args.handler = &task_no_data_intr;
619 err = ide_diag_taskfile(drive, &args, 0, NULL);
620 break;
621 default:
622 err = -EFAULT;
623 goto abort;
624 }
625
626 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
627 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
628 req_task->in_flags = args.tf_in_flags;
629 req_task->out_flags = args.tf_out_flags;
630
631 if (copy_to_user(buf, req_task, tasksize)) {
632 err = -EFAULT;
633 goto abort;
634 }
635 if (taskout) {
636 int outtotal = tasksize;
637 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
638 err = -EFAULT;
639 goto abort;
640 }
641 }
642 if (taskin) {
643 int intotal = tasksize + taskout;
644 if (copy_to_user(buf + intotal, inbuf, taskin)) {
645 err = -EFAULT;
646 goto abort;
647 }
648 }
649 abort:
650 kfree(req_task);
651 if (outbuf != NULL)
652 kfree(outbuf);
653 if (inbuf != NULL)
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 = kmalloc(argsize, GFP_KERNEL);
712 if (argbuf == NULL)
713 return -ENOMEM;
714 memcpy(argbuf, args, 4);
715 }
716 if (set_transfer(drive, &tfargs)) {
717 xfer_rate = args[1];
718 if (ide_ata66_check(drive, &tfargs))
719 goto abort;
720 }
721
722 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
723
724 if (!err && xfer_rate) {
725 /* active-retuning-calls future */
726 ide_set_xfer_rate(drive, xfer_rate);
727 ide_driveid_update(drive);
728 }
729 abort:
730 if (copy_to_user((void __user *)arg, argbuf, argsize))
731 err = -EFAULT;
732 if (argsize > 4)
733 kfree(argbuf);
734 return err;
735 }
736
737 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
738 {
739 struct request rq;
740
741 ide_init_drive_cmd(&rq);
742 rq.flags = REQ_DRIVE_TASK;
743 rq.buffer = buf;
744 return ide_do_drive_cmd(drive, &rq, ide_wait);
745 }
746
747 /*
748 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
749 */
750 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
751 {
752 void __user *p = (void __user *)arg;
753 int err = 0;
754 u8 args[7], *argbuf = args;
755 int argsize = 7;
756
757 if (copy_from_user(args, p, 7))
758 return -EFAULT;
759 err = ide_wait_cmd_task(drive, argbuf);
760 if (copy_to_user(p, argbuf, argsize))
761 err = -EFAULT;
762 return err;
763 }
764
765 /*
766 * NOTICE: This is additions from IBM to provide a discrete interface,
767 * for selective taskregister access operations. Nice JOB Klaus!!!
768 * Glad to be able to work and co-develop this with you and IBM.
769 */
770 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
771 {
772 ide_hwif_t *hwif = HWIF(drive);
773 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
774 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
775 #if DEBUG_TASKFILE
776 u8 status;
777 #endif
778
779 if (task->data_phase == TASKFILE_MULTI_IN ||
780 task->data_phase == TASKFILE_MULTI_OUT) {
781 if (!drive->mult_count) {
782 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
783 return ide_stopped;
784 }
785 }
786
787 /*
788 * (ks) Check taskfile in/out flags.
789 * If set, then execute as it is defined.
790 * If not set, then define default settings.
791 * The default values are:
792 * write and read all taskfile registers (except data)
793 * write and read the hob registers (sector,nsector,lcyl,hcyl)
794 */
795 if (task->tf_out_flags.all == 0) {
796 task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS;
797 if (drive->addressing == 1)
798 task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8);
799 }
800
801 if (task->tf_in_flags.all == 0) {
802 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
803 if (drive->addressing == 1)
804 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
805 }
806
807 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
808 if (IDE_CONTROL_REG)
809 /* clear nIEN */
810 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
811 SELECT_MASK(drive, 0);
812
813 #if DEBUG_TASKFILE
814 status = hwif->INB(IDE_STATUS_REG);
815 if (status & 0x80) {
816 printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status);
817 udelay(100);
818 status = hwif->INB(IDE_STATUS_REG);
819 printk("flagged_taskfile -> Status = %02x\n", status);
820 }
821 #endif
822
823 if (task->tf_out_flags.b.data) {
824 u16 data = taskfile->data + (hobfile->data << 8);
825 hwif->OUTW(data, IDE_DATA_REG);
826 }
827
828 /* (ks) send hob registers first */
829 if (task->tf_out_flags.b.nsector_hob)
830 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
831 if (task->tf_out_flags.b.sector_hob)
832 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
833 if (task->tf_out_flags.b.lcyl_hob)
834 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
835 if (task->tf_out_flags.b.hcyl_hob)
836 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
837
838 /* (ks) Send now the standard registers */
839 if (task->tf_out_flags.b.error_feature)
840 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
841 /* refers to number of sectors to transfer */
842 if (task->tf_out_flags.b.nsector)
843 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
844 /* refers to sector offset or start sector */
845 if (task->tf_out_flags.b.sector)
846 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
847 if (task->tf_out_flags.b.lcyl)
848 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
849 if (task->tf_out_flags.b.hcyl)
850 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
851
852 /*
853 * (ks) In the flagged taskfile approch, we will use all specified
854 * registers and the register value will not be changed, except the
855 * select bit (master/slave) in the drive_head register. We must make
856 * sure that the desired drive is selected.
857 */
858 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
859 switch(task->data_phase) {
860
861 case TASKFILE_OUT_DMAQ:
862 case TASKFILE_OUT_DMA:
863 case TASKFILE_IN_DMAQ:
864 case TASKFILE_IN_DMA:
865 hwif->dma_setup(drive);
866 hwif->dma_exec_cmd(drive, taskfile->command);
867 hwif->dma_start(drive);
868 break;
869
870 default:
871 if (task->handler == NULL)
872 return ide_stopped;
873
874 /* Issue the command */
875 if (task->prehandler) {
876 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
877 ndelay(400); /* FIXME */
878 return task->prehandler(drive, task->rq);
879 }
880 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
881 }
882
883 return ide_started;
884 }
Support for the Chinese Samsung S3C2440 based development boards