2 * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003
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
10 * The big the bad and the ugly.
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/timer.h>
19 #include <linux/sched.h>
20 #include <linux/interrupt.h>
21 #include <linux/major.h>
22 #include <linux/errno.h>
23 #include <linux/genhd.h>
24 #include <linux/blkpg.h>
25 #include <linux/slab.h>
26 #include <linux/pci.h>
27 #include <linux/delay.h>
28 #include <linux/hdreg.h>
29 #include <linux/ide.h>
30 #include <linux/bitops.h>
31 #include <linux/scatterlist.h>
33 #include <asm/byteorder.h>
35 #include <asm/uaccess.h>
38 static void ata_bswap_data (void *buffer, int wcount)
43 *p = *p << 8 | *p >> 8; p++;
44 *p = *p << 8 | *p >> 8; p++;
48 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
50 HWIF(drive)->ata_input_data(drive, buffer, wcount);
52 ata_bswap_data(buffer, wcount);
55 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
58 ata_bswap_data(buffer, wcount);
59 HWIF(drive)->ata_output_data(drive, buffer, wcount);
60 ata_bswap_data(buffer, wcount);
62 HWIF(drive)->ata_output_data(drive, buffer, wcount);
66 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
68 ide_hwif_t *hwif = drive->hwif;
69 struct ide_taskfile *tf = &task->tf;
70 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
72 if (task->tf_flags & IDE_TFLAG_FLAGGED)
76 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
77 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
78 drive->name, tf->feature, tf->nsect, tf->lbal,
79 tf->lbam, tf->lbah, tf->device, tf->command);
83 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
85 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
86 SELECT_MASK(drive, 0);
88 if (task->tf_flags & IDE_TFLAG_OUT_DATA)
89 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
91 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
92 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
93 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
94 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
95 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
96 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
97 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
98 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
99 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
100 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
102 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
103 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
104 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
105 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
106 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
107 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
108 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
109 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
110 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
111 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
113 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
114 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
117 EXPORT_SYMBOL_GPL(ide_tf_load);
119 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
123 memset(&args, 0, sizeof(ide_task_t));
124 args.tf.nsect = 0x01;
125 if (drive->media == ide_disk)
126 args.tf.command = WIN_IDENTIFY;
128 args.tf.command = WIN_PIDENTIFY;
129 args.command_type = IDE_DRIVE_TASK_IN;
130 args.data_phase = TASKFILE_IN;
131 args.handler = &task_in_intr;
132 return ide_raw_taskfile(drive, &args, buf);
135 static int inline task_dma_ok(ide_task_t *task)
137 if (task->tf_flags & IDE_TFLAG_FLAGGED)
140 switch (task->tf.command) {
141 case WIN_WRITEDMA_ONCE:
143 case WIN_WRITEDMA_EXT:
144 case WIN_READDMA_ONCE:
146 case WIN_READDMA_EXT:
147 case WIN_IDENTIFY_DMA:
154 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
156 ide_hwif_t *hwif = HWIF(drive);
157 struct ide_taskfile *tf = &task->tf;
159 ide_tf_load(drive, task);
161 if (task->handler != NULL) {
162 if (task->prehandler != NULL) {
163 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
164 ndelay(400); /* FIXME */
165 return task->prehandler(drive, task->rq);
167 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
171 if (task_dma_ok(task) && drive->using_dma && !hwif->dma_setup(drive)) {
172 hwif->dma_exec_cmd(drive, tf->command);
173 hwif->dma_start(drive);
181 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
183 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
185 ide_hwif_t *hwif = HWIF(drive);
188 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
189 drive->mult_count = drive->mult_req;
191 drive->mult_req = drive->mult_count = 0;
192 drive->special.b.recalibrate = 1;
193 (void) ide_dump_status(drive, "set_multmode", stat);
199 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
201 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
203 ide_hwif_t *hwif = HWIF(drive);
207 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
210 if (OK_STAT(stat, READY_STAT, BAD_STAT))
213 if (stat & (ERR_STAT|DRQ_STAT))
214 return ide_error(drive, "set_geometry_intr", stat);
216 BUG_ON(HWGROUP(drive)->handler != NULL);
217 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
222 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
224 ide_startstop_t recal_intr (ide_drive_t *drive)
226 ide_hwif_t *hwif = HWIF(drive);
229 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
230 return ide_error(drive, "recal_intr", stat);
235 * Handler for commands without a data phase
237 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
239 ide_task_t *args = HWGROUP(drive)->rq->special;
240 ide_hwif_t *hwif = HWIF(drive);
243 local_irq_enable_in_hardirq();
244 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
245 return ide_error(drive, "task_no_data_intr", stat);
246 /* calls ide_end_drive_cmd */
249 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
254 static u8 wait_drive_not_busy(ide_drive_t *drive)
256 ide_hwif_t *hwif = HWIF(drive);
261 * Last sector was transfered, wait until drive is ready.
262 * This can take up to 10 usec, but we will wait max 1 ms
263 * (drive_cmd_intr() waits that long).
265 for (retries = 0; retries < 100; retries++) {
266 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
272 if (stat & BUSY_STAT)
273 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
278 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
280 ide_hwif_t *hwif = drive->hwif;
281 struct scatterlist *sg = hwif->sg_table;
282 struct scatterlist *cursg = hwif->cursg;
284 #ifdef CONFIG_HIGHMEM
296 page = sg_page(cursg);
297 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
299 /* get the current page and offset */
300 page = nth_page(page, (offset >> PAGE_SHIFT));
303 #ifdef CONFIG_HIGHMEM
304 local_irq_save(flags);
306 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
311 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
312 hwif->cursg = sg_next(hwif->cursg);
316 /* do the actual data transfer */
318 taskfile_output_data(drive, buf, SECTOR_WORDS);
320 taskfile_input_data(drive, buf, SECTOR_WORDS);
322 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
323 #ifdef CONFIG_HIGHMEM
324 local_irq_restore(flags);
328 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
332 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
334 ide_pio_sector(drive, write);
337 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
340 if (rq->bio) /* fs request */
343 touch_softlockup_watchdog();
345 switch (drive->hwif->data_phase) {
346 case TASKFILE_MULTI_IN:
347 case TASKFILE_MULTI_OUT:
348 ide_pio_multi(drive, write);
351 ide_pio_sector(drive, write);
356 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
357 const char *s, u8 stat)
360 ide_hwif_t *hwif = drive->hwif;
361 int sectors = hwif->nsect - hwif->nleft;
363 switch (hwif->data_phase) {
371 case TASKFILE_MULTI_IN:
375 case TASKFILE_MULTI_OUT:
376 sectors -= drive->mult_count;
384 drv = *(ide_driver_t **)rq->rq_disk->private_data;
385 drv->end_request(drive, 1, sectors);
388 return ide_error(drive, s, stat);
391 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
393 HWIF(drive)->cursg = NULL;
395 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
396 ide_task_t *task = rq->special;
398 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
399 u8 err = drive->hwif->INB(IDE_ERROR_REG);
400 ide_end_drive_cmd(drive, stat, err);
408 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
409 drv->end_request(drive, 1, rq->hard_nr_sectors);
411 ide_end_request(drive, 1, rq->hard_nr_sectors);
415 * Handler for command with PIO data-in phase (Read/Read Multiple).
417 ide_startstop_t task_in_intr (ide_drive_t *drive)
419 ide_hwif_t *hwif = drive->hwif;
420 struct request *rq = HWGROUP(drive)->rq;
421 u8 stat = hwif->INB(IDE_STATUS_REG);
423 /* new way for dealing with premature shared PCI interrupts */
424 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
425 if (stat & (ERR_STAT | DRQ_STAT))
426 return task_error(drive, rq, __FUNCTION__, stat);
427 /* No data yet, so wait for another IRQ. */
428 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
432 ide_pio_datablock(drive, rq, 0);
434 /* If it was the last datablock check status and finish transfer. */
436 stat = wait_drive_not_busy(drive);
437 if (!OK_STAT(stat, 0, BAD_R_STAT))
438 return task_error(drive, rq, __FUNCTION__, stat);
439 task_end_request(drive, rq, stat);
443 /* Still data left to transfer. */
444 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
448 EXPORT_SYMBOL(task_in_intr);
451 * Handler for command with PIO data-out phase (Write/Write Multiple).
453 static ide_startstop_t task_out_intr (ide_drive_t *drive)
455 ide_hwif_t *hwif = drive->hwif;
456 struct request *rq = HWGROUP(drive)->rq;
457 u8 stat = hwif->INB(IDE_STATUS_REG);
459 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
460 return task_error(drive, rq, __FUNCTION__, stat);
462 /* Deal with unexpected ATA data phase. */
463 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
464 return task_error(drive, rq, __FUNCTION__, stat);
467 task_end_request(drive, rq, stat);
471 /* Still data left to transfer. */
472 ide_pio_datablock(drive, rq, 1);
473 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
478 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
480 ide_startstop_t startstop;
482 if (ide_wait_stat(&startstop, drive, DATA_READY,
483 drive->bad_wstat, WAIT_DRQ)) {
484 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
486 drive->hwif->data_phase ? "MULT" : "",
487 drive->addressing ? "_EXT" : "");
494 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
495 ide_pio_datablock(drive, rq, 1);
499 EXPORT_SYMBOL(pre_task_out_intr);
501 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
505 memset(&rq, 0, sizeof(rq));
507 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
511 * (ks) We transfer currently only whole sectors.
512 * This is suffient for now. But, it would be great,
513 * if we would find a solution to transfer any size.
514 * To support special commands like READ LONG.
516 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
518 rq.nr_sectors = (args->tf.hob_nsect << 8) | args->tf.nsect;
520 rq.nr_sectors = data_size / SECTOR_SIZE;
522 if (!rq.nr_sectors) {
523 printk(KERN_ERR "%s: in/out command without data\n",
528 rq.hard_nr_sectors = rq.nr_sectors;
529 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
531 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
532 rq.cmd_flags |= REQ_RW;
537 return ide_do_drive_cmd(drive, &rq, ide_wait);
540 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
542 return ide_diag_taskfile(drive, args, 0, buf);
545 EXPORT_SYMBOL(ide_raw_taskfile);
547 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
549 task->command_type = IDE_DRIVE_TASK_NO_DATA;
550 task->data_phase = TASKFILE_NO_DATA;
551 task->handler = task_no_data_intr;
553 return ide_raw_taskfile(drive, task, NULL);
555 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
557 #ifdef CONFIG_IDE_TASK_IOCTL
558 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
560 ide_task_request_t *req_task;
565 int tasksize = sizeof(struct ide_task_request_s);
566 unsigned int taskin = 0;
567 unsigned int taskout = 0;
568 u8 io_32bit = drive->io_32bit;
569 char __user *buf = (char __user *)arg;
571 // printk("IDE Taskfile ...\n");
573 req_task = kzalloc(tasksize, GFP_KERNEL);
574 if (req_task == NULL) return -ENOMEM;
575 if (copy_from_user(req_task, buf, tasksize)) {
580 taskout = req_task->out_size;
581 taskin = req_task->in_size;
583 if (taskin > 65536 || taskout > 65536) {
589 int outtotal = tasksize;
590 outbuf = kzalloc(taskout, GFP_KERNEL);
591 if (outbuf == NULL) {
595 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
602 int intotal = tasksize + taskout;
603 inbuf = kzalloc(taskin, GFP_KERNEL);
608 if (copy_from_user(inbuf, buf + intotal, taskin)) {
614 memset(&args, 0, sizeof(ide_task_t));
616 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
617 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
618 args.tf_in_flags = req_task->in_flags;
619 args.data_phase = req_task->data_phase;
620 args.command_type = req_task->req_cmd;
622 if (req_task->out_flags.all) {
623 args.tf_flags |= IDE_TFLAG_FLAGGED;
625 if (req_task->out_flags.b.data)
626 args.tf_flags |= IDE_TFLAG_OUT_DATA;
628 if (req_task->out_flags.b.nsector_hob)
629 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
630 if (req_task->out_flags.b.sector_hob)
631 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
632 if (req_task->out_flags.b.lcyl_hob)
633 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
634 if (req_task->out_flags.b.hcyl_hob)
635 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
637 if (req_task->out_flags.b.error_feature)
638 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
639 if (req_task->out_flags.b.nsector)
640 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
641 if (req_task->out_flags.b.sector)
642 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
643 if (req_task->out_flags.b.lcyl)
644 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
645 if (req_task->out_flags.b.hcyl)
646 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
650 switch(req_task->data_phase) {
651 case TASKFILE_OUT_DMAQ:
652 case TASKFILE_OUT_DMA:
653 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
655 case TASKFILE_IN_DMAQ:
656 case TASKFILE_IN_DMA:
657 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
659 case TASKFILE_MULTI_OUT:
660 if (!drive->mult_count) {
661 /* (hs): give up if multcount is not set */
662 printk(KERN_ERR "%s: %s Multimode Write " \
663 "multcount is not set\n",
664 drive->name, __FUNCTION__);
670 args.prehandler = &pre_task_out_intr;
671 args.handler = &task_out_intr;
672 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
674 case TASKFILE_MULTI_IN:
675 if (!drive->mult_count) {
676 /* (hs): give up if multcount is not set */
677 printk(KERN_ERR "%s: %s Multimode Read failure " \
678 "multcount is not set\n",
679 drive->name, __FUNCTION__);
685 args.handler = &task_in_intr;
686 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
688 case TASKFILE_NO_DATA:
689 args.handler = &task_no_data_intr;
690 err = ide_diag_taskfile(drive, &args, 0, NULL);
697 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
698 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
699 req_task->in_flags = args.tf_in_flags;
701 if (copy_to_user(buf, req_task, tasksize)) {
706 int outtotal = tasksize;
707 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
713 int intotal = tasksize + taskout;
714 if (copy_to_user(buf + intotal, inbuf, taskin)) {
724 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
726 drive->io_32bit = io_32bit;
732 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
739 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
740 ide_init_drive_cmd(&rq);
746 return ide_do_drive_cmd(drive, &rq, ide_wait);
749 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
752 u8 args[4], *argbuf = args;
756 struct ide_taskfile *tf = &tfargs.tf;
758 if (NULL == (void *) arg) {
760 ide_init_drive_cmd(&rq);
761 return ide_do_drive_cmd(drive, &rq, ide_wait);
764 if (copy_from_user(args, (void __user *)arg, 4))
767 memset(&tfargs, 0, sizeof(ide_task_t));
768 tf->feature = args[2];
771 tf->command = args[0];
774 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
775 argbuf = kzalloc(argsize, GFP_KERNEL);
779 if (set_transfer(drive, &tfargs)) {
781 if (ide_ata66_check(drive, &tfargs))
785 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
787 if (!err && xfer_rate) {
788 /* active-retuning-calls future */
789 ide_set_xfer_rate(drive, xfer_rate);
790 ide_driveid_update(drive);
793 if (copy_to_user((void __user *)arg, argbuf, argsize))
800 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
804 ide_init_drive_cmd(&rq);
805 rq.cmd_type = REQ_TYPE_ATA_TASK;
807 return ide_do_drive_cmd(drive, &rq, ide_wait);
810 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
812 void __user *p = (void __user *)arg;
814 u8 args[7], *argbuf = args;
817 if (copy_from_user(args, p, 7))
819 err = ide_wait_cmd_task(drive, argbuf);
820 if (copy_to_user(p, argbuf, argsize))
826 * NOTICE: This is additions from IBM to provide a discrete interface,
827 * for selective taskregister access operations. Nice JOB Klaus!!!
828 * Glad to be able to work and co-develop this with you and IBM.
830 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
832 if (task->data_phase == TASKFILE_MULTI_IN ||
833 task->data_phase == TASKFILE_MULTI_OUT) {
834 if (!drive->mult_count) {
835 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
841 * (ks) Check taskfile in flags.
842 * If set, then execute as it is defined.
843 * If not set, then define default settings.
844 * The default values are:
845 * read all taskfile registers (except data)
846 * read the hob registers (sector, nsector, lcyl, hcyl)
848 if (task->tf_in_flags.all == 0) {
849 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
850 if (drive->addressing == 1)
851 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
854 return do_rw_taskfile(drive, task);