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