2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat <alan@redhat.com>
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/string.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
13 #include <linux/interrupt.h>
14 #include <linux/major.h>
15 #include <linux/errno.h>
16 #include <linux/genhd.h>
17 #include <linux/blkpg.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/hdreg.h>
22 #include <linux/ide.h>
23 #include <linux/bitops.h>
24 #include <linux/nmi.h>
26 #include <asm/byteorder.h>
28 #include <asm/uaccess.h>
32 * Conventional PIO operations for ATA devices
35 static u8 ide_inb (unsigned long port)
37 return (u8) inb(port);
40 static void ide_outb (u8 val, unsigned long port)
46 * MMIO operations, typically used for SATA controllers
49 static u8 ide_mm_inb (unsigned long port)
51 return (u8) readb((void __iomem *) port);
54 static void ide_mm_outb (u8 value, unsigned long port)
56 writeb(value, (void __iomem *) port);
59 void SELECT_DRIVE (ide_drive_t *drive)
61 ide_hwif_t *hwif = drive->hwif;
62 const struct ide_port_ops *port_ops = hwif->port_ops;
65 if (port_ops && port_ops->selectproc)
66 port_ops->selectproc(drive);
68 memset(&task, 0, sizeof(task));
69 task.tf_flags = IDE_TFLAG_OUT_DEVICE;
71 drive->hwif->tp_ops->tf_load(drive, &task);
74 void SELECT_MASK(ide_drive_t *drive, int mask)
76 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
78 if (port_ops && port_ops->maskproc)
79 port_ops->maskproc(drive, mask);
82 void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
84 if (hwif->host_flags & IDE_HFLAG_MMIO)
85 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
87 outb(cmd, hwif->io_ports.command_addr);
89 EXPORT_SYMBOL_GPL(ide_exec_command);
91 u8 ide_read_status(ide_hwif_t *hwif)
93 if (hwif->host_flags & IDE_HFLAG_MMIO)
94 return readb((void __iomem *)hwif->io_ports.status_addr);
96 return inb(hwif->io_ports.status_addr);
98 EXPORT_SYMBOL_GPL(ide_read_status);
100 u8 ide_read_altstatus(ide_hwif_t *hwif)
102 if (hwif->host_flags & IDE_HFLAG_MMIO)
103 return readb((void __iomem *)hwif->io_ports.ctl_addr);
105 return inb(hwif->io_ports.ctl_addr);
107 EXPORT_SYMBOL_GPL(ide_read_altstatus);
109 u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
111 if (hwif->host_flags & IDE_HFLAG_MMIO)
112 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
114 return inb(hwif->dma_base + ATA_DMA_STATUS);
116 EXPORT_SYMBOL_GPL(ide_read_sff_dma_status);
118 void ide_set_irq(ide_hwif_t *hwif, int on)
120 u8 ctl = ATA_DEVCTL_OBS;
122 if (on == 4) { /* hack for SRST */
129 if (hwif->host_flags & IDE_HFLAG_MMIO)
130 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
132 outb(ctl, hwif->io_ports.ctl_addr);
134 EXPORT_SYMBOL_GPL(ide_set_irq);
136 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
138 ide_hwif_t *hwif = drive->hwif;
139 struct ide_io_ports *io_ports = &hwif->io_ports;
140 struct ide_taskfile *tf = &task->tf;
141 void (*tf_outb)(u8 addr, unsigned long port);
142 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
143 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
146 tf_outb = ide_mm_outb;
150 if (task->tf_flags & IDE_TFLAG_FLAGGED)
153 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
154 u16 data = (tf->hob_data << 8) | tf->data;
157 writew(data, (void __iomem *)io_ports->data_addr);
159 outw(data, io_ports->data_addr);
162 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
163 tf_outb(tf->hob_feature, io_ports->feature_addr);
164 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
165 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
166 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
167 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
168 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
169 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
170 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
171 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
173 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
174 tf_outb(tf->feature, io_ports->feature_addr);
175 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
176 tf_outb(tf->nsect, io_ports->nsect_addr);
177 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
178 tf_outb(tf->lbal, io_ports->lbal_addr);
179 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
180 tf_outb(tf->lbam, io_ports->lbam_addr);
181 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
182 tf_outb(tf->lbah, io_ports->lbah_addr);
184 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
185 tf_outb((tf->device & HIHI) | drive->select.all,
186 io_ports->device_addr);
188 EXPORT_SYMBOL_GPL(ide_tf_load);
190 void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
192 ide_hwif_t *hwif = drive->hwif;
193 struct ide_io_ports *io_ports = &hwif->io_ports;
194 struct ide_taskfile *tf = &task->tf;
195 void (*tf_outb)(u8 addr, unsigned long port);
196 u8 (*tf_inb)(unsigned long port);
197 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
200 tf_outb = ide_mm_outb;
207 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
211 data = readw((void __iomem *)io_ports->data_addr);
213 data = inw(io_ports->data_addr);
215 tf->data = data & 0xff;
216 tf->hob_data = (data >> 8) & 0xff;
219 /* be sure we're looking at the low order bits */
220 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
222 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
223 tf->feature = tf_inb(io_ports->feature_addr);
224 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
225 tf->nsect = tf_inb(io_ports->nsect_addr);
226 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
227 tf->lbal = tf_inb(io_ports->lbal_addr);
228 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
229 tf->lbam = tf_inb(io_ports->lbam_addr);
230 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
231 tf->lbah = tf_inb(io_ports->lbah_addr);
232 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
233 tf->device = tf_inb(io_ports->device_addr);
235 if (task->tf_flags & IDE_TFLAG_LBA48) {
236 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
238 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
239 tf->hob_feature = tf_inb(io_ports->feature_addr);
240 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
241 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
242 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
243 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
244 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
245 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
246 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
247 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
250 EXPORT_SYMBOL_GPL(ide_tf_read);
253 * Some localbus EIDE interfaces require a special access sequence
254 * when using 32-bit I/O instructions to transfer data. We call this
255 * the "vlb_sync" sequence, which consists of three successive reads
256 * of the sector count register location, with interrupts disabled
257 * to ensure that the reads all happen together.
259 static void ata_vlb_sync(unsigned long port)
267 * This is used for most PIO data transfers *from* the IDE interface
269 * These routines will round up any request for an odd number of bytes,
270 * so if an odd len is specified, be sure that there's at least one
271 * extra byte allocated for the buffer.
273 void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
276 ide_hwif_t *hwif = drive->hwif;
277 struct ide_io_ports *io_ports = &hwif->io_ports;
278 unsigned long data_addr = io_ports->data_addr;
279 u8 io_32bit = drive->io_32bit;
280 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
285 unsigned long uninitialized_var(flags);
287 if ((io_32bit & 2) && !mmio) {
288 local_irq_save(flags);
289 ata_vlb_sync(io_ports->nsect_addr);
293 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
295 insl(data_addr, buf, len / 4);
297 if ((io_32bit & 2) && !mmio)
298 local_irq_restore(flags);
300 if ((len & 3) >= 2) {
302 __ide_mm_insw((void __iomem *)data_addr,
303 (u8 *)buf + (len & ~3), 1);
305 insw(data_addr, (u8 *)buf + (len & ~3), 1);
309 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
311 insw(data_addr, buf, len / 2);
314 EXPORT_SYMBOL_GPL(ide_input_data);
317 * This is used for most PIO data transfers *to* the IDE interface
319 void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
322 ide_hwif_t *hwif = drive->hwif;
323 struct ide_io_ports *io_ports = &hwif->io_ports;
324 unsigned long data_addr = io_ports->data_addr;
325 u8 io_32bit = drive->io_32bit;
326 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
329 unsigned long uninitialized_var(flags);
331 if ((io_32bit & 2) && !mmio) {
332 local_irq_save(flags);
333 ata_vlb_sync(io_ports->nsect_addr);
337 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
339 outsl(data_addr, buf, len / 4);
341 if ((io_32bit & 2) && !mmio)
342 local_irq_restore(flags);
344 if ((len & 3) >= 2) {
346 __ide_mm_outsw((void __iomem *)data_addr,
347 (u8 *)buf + (len & ~3), 1);
349 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
353 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
355 outsw(data_addr, buf, len / 2);
358 EXPORT_SYMBOL_GPL(ide_output_data);
360 u8 ide_read_error(ide_drive_t *drive)
364 memset(&task, 0, sizeof(task));
365 task.tf_flags = IDE_TFLAG_IN_FEATURE;
367 drive->hwif->tp_ops->tf_read(drive, &task);
369 return task.tf.error;
371 EXPORT_SYMBOL_GPL(ide_read_error);
373 void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
377 memset(&task, 0, sizeof(task));
378 task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
381 drive->hwif->tp_ops->tf_read(drive, &task);
383 *bcount = (task.tf.lbah << 8) | task.tf.lbam;
384 *ireason = task.tf.nsect & 3;
386 EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
388 const struct ide_tp_ops default_tp_ops = {
389 .exec_command = ide_exec_command,
390 .read_status = ide_read_status,
391 .read_altstatus = ide_read_altstatus,
392 .read_sff_dma_status = ide_read_sff_dma_status,
394 .set_irq = ide_set_irq,
396 .tf_load = ide_tf_load,
397 .tf_read = ide_tf_read,
399 .input_data = ide_input_data,
400 .output_data = ide_output_data,
403 void ide_fix_driveid(struct hd_driveid *driveid)
405 #ifndef __LITTLE_ENDIAN
407 u16 *id = (u16 *)driveid;
410 for (i = 0; i < 256; i++) {
411 /* these words are accessed as two 8-bit values */
412 if (i == 47 || i == 49 || i == 51 || i == 52 || i == 59)
414 if (i == 60 || i == 61) /* ->lba_capacity is 32-bit */
416 if (i == 98 || i == 99) /* ->spg is 32-bit */
418 if (i > 99 && i < 104) /* ->lba_capacity_2 is 64-bit */
421 id[i] = __le16_to_cpu(id[i]);
424 driveid->lba_capacity = __le32_to_cpu(driveid->lba_capacity);
425 driveid->spg = __le32_to_cpu(driveid->spg);
426 driveid->lba_capacity_2 = __le64_to_cpu(driveid->lba_capacity_2);
428 # error "Please fix <asm/byteorder.h>"
434 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
435 * removing leading/trailing blanks and compressing internal blanks.
436 * It is primarily used to tidy up the model name/number fields as
437 * returned by the WIN_[P]IDENTIFY commands.
440 void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
442 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
445 /* convert from big-endian to host byte order */
446 for (p = end ; p != s;)
447 be16_to_cpus((u16 *)(p -= 2));
449 /* strip leading blanks */
450 while (s != end && *s == ' ')
452 /* compress internal blanks and strip trailing blanks */
453 while (s != end && *s) {
454 if (*s++ != ' ' || (s != end && *s && *s != ' '))
457 /* wipe out trailing garbage */
462 EXPORT_SYMBOL(ide_fixstring);
465 * Needed for PCI irq sharing
467 int drive_is_ready (ide_drive_t *drive)
469 ide_hwif_t *hwif = HWIF(drive);
472 if (drive->waiting_for_dma)
473 return hwif->dma_ops->dma_test_irq(drive);
476 /* need to guarantee 400ns since last command was issued */
481 * We do a passive status test under shared PCI interrupts on
482 * cards that truly share the ATA side interrupt, but may also share
483 * an interrupt with another pci card/device. We make no assumptions
484 * about possible isa-pnp and pci-pnp issues yet.
486 if (hwif->io_ports.ctl_addr)
487 stat = hwif->tp_ops->read_altstatus(hwif);
489 /* Note: this may clear a pending IRQ!! */
490 stat = hwif->tp_ops->read_status(hwif);
492 if (stat & BUSY_STAT)
493 /* drive busy: definitely not interrupting */
496 /* drive ready: *might* be interrupting */
500 EXPORT_SYMBOL(drive_is_ready);
503 * This routine busy-waits for the drive status to be not "busy".
504 * It then checks the status for all of the "good" bits and none
505 * of the "bad" bits, and if all is okay it returns 0. All other
506 * cases return error -- caller may then invoke ide_error().
508 * This routine should get fixed to not hog the cpu during extra long waits..
509 * That could be done by busy-waiting for the first jiffy or two, and then
510 * setting a timer to wake up at half second intervals thereafter,
511 * until timeout is achieved, before timing out.
513 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
515 ide_hwif_t *hwif = drive->hwif;
516 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
521 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
522 stat = tp_ops->read_status(hwif);
524 if (stat & BUSY_STAT) {
525 local_irq_set(flags);
527 while ((stat = tp_ops->read_status(hwif)) & BUSY_STAT) {
528 if (time_after(jiffies, timeout)) {
530 * One last read after the timeout in case
531 * heavy interrupt load made us not make any
532 * progress during the timeout..
534 stat = tp_ops->read_status(hwif);
535 if (!(stat & BUSY_STAT))
538 local_irq_restore(flags);
543 local_irq_restore(flags);
546 * Allow status to settle, then read it again.
547 * A few rare drives vastly violate the 400ns spec here,
548 * so we'll wait up to 10usec for a "good" status
549 * rather than expensively fail things immediately.
550 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
552 for (i = 0; i < 10; i++) {
554 stat = tp_ops->read_status(hwif);
556 if (OK_STAT(stat, good, bad)) {
566 * In case of error returns error value after doing "*startstop = ide_error()".
567 * The caller should return the updated value of "startstop" in this case,
568 * "startstop" is unchanged when the function returns 0.
570 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
575 /* bail early if we've exceeded max_failures */
576 if (drive->max_failures && (drive->failures > drive->max_failures)) {
577 *startstop = ide_stopped;
581 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
584 char *s = (err == -EBUSY) ? "status timeout" : "status error";
585 *startstop = ide_error(drive, s, stat);
591 EXPORT_SYMBOL(ide_wait_stat);
594 * ide_in_drive_list - look for drive in black/white list
595 * @id: drive identifier
596 * @drive_table: list to inspect
598 * Look for a drive in the blacklist and the whitelist tables
599 * Returns 1 if the drive is found in the table.
602 int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
604 for ( ; drive_table->id_model; drive_table++)
605 if ((!strcmp(drive_table->id_model, id->model)) &&
606 (!drive_table->id_firmware ||
607 strstr(id->fw_rev, drive_table->id_firmware)))
612 EXPORT_SYMBOL_GPL(ide_in_drive_list);
615 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
616 * We list them here and depend on the device side cable detection for them.
618 * Some optical devices with the buggy firmwares have the same problem.
620 static const struct drive_list_entry ivb_list[] = {
621 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
622 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
623 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
624 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
625 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
626 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
627 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
632 * All hosts that use the 80c ribbon must use!
633 * The name is derived from upper byte of word 93 and the 80c ribbon.
635 u8 eighty_ninty_three (ide_drive_t *drive)
637 ide_hwif_t *hwif = drive->hwif;
638 struct hd_driveid *id = drive->id;
639 int ivb = ide_in_drive_list(id, ivb_list);
641 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
645 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
648 if (ide_dev_is_sata(id) && !ivb)
651 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
656 * - change master/slave IDENTIFY order
657 * - force bit13 (80c cable present) check also for !ivb devices
658 * (unless the slave device is pre-ATA3)
660 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
664 if (drive->udma33_warned == 1)
667 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
668 "limiting max speed to UDMA33\n",
670 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
672 drive->udma33_warned = 1;
677 int ide_driveid_update(ide_drive_t *drive)
679 ide_hwif_t *hwif = drive->hwif;
680 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
681 struct hd_driveid *id;
682 unsigned long timeout, flags;
686 * Re-read drive->id for possible DMA mode
687 * change (copied from ide-probe.c)
690 SELECT_MASK(drive, 1);
691 tp_ops->set_irq(hwif, 0);
693 tp_ops->exec_command(hwif, WIN_IDENTIFY);
694 timeout = jiffies + WAIT_WORSTCASE;
696 if (time_after(jiffies, timeout)) {
697 SELECT_MASK(drive, 0);
698 return 0; /* drive timed-out */
701 msleep(50); /* give drive a breather */
702 stat = tp_ops->read_altstatus(hwif);
703 } while (stat & BUSY_STAT);
705 msleep(50); /* wait for IRQ and DRQ_STAT */
706 stat = tp_ops->read_status(hwif);
708 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
709 SELECT_MASK(drive, 0);
710 printk("%s: CHECK for good STATUS\n", drive->name);
713 local_irq_save(flags);
714 SELECT_MASK(drive, 0);
715 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
717 local_irq_restore(flags);
720 tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
721 (void)tp_ops->read_status(hwif); /* clear drive IRQ */
723 local_irq_restore(flags);
726 drive->id->dma_ultra = id->dma_ultra;
727 drive->id->dma_mword = id->dma_mword;
728 drive->id->dma_1word = id->dma_1word;
729 /* anything more ? */
732 if (drive->using_dma && ide_id_dma_bug(drive))
739 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
741 ide_hwif_t *hwif = drive->hwif;
742 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
747 #ifdef CONFIG_BLK_DEV_IDEDMA
748 if (hwif->dma_ops) /* check if host supports DMA */
749 hwif->dma_ops->dma_host_set(drive, 0);
752 /* Skip setting PIO flow-control modes on pre-EIDE drives */
753 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
757 * Don't use ide_wait_cmd here - it will
758 * attempt to set_geometry and recalibrate,
759 * but for some reason these don't work at
760 * this point (lost interrupt).
763 * Select the drive, and issue the SETFEATURES command
765 disable_irq_nosync(hwif->irq);
768 * FIXME: we race against the running IRQ here if
769 * this is called from non IRQ context. If we use
770 * disable_irq() we hang on the error path. Work
776 SELECT_MASK(drive, 0);
778 tp_ops->set_irq(hwif, 0);
780 memset(&task, 0, sizeof(task));
781 task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
782 task.tf.feature = SETFEATURES_XFER;
783 task.tf.nsect = speed;
785 tp_ops->tf_load(drive, &task);
787 tp_ops->exec_command(hwif, WIN_SETFEATURES);
789 if (drive->quirk_list == 2)
790 tp_ops->set_irq(hwif, 1);
792 error = __ide_wait_stat(drive, drive->ready_stat,
793 BUSY_STAT|DRQ_STAT|ERR_STAT,
796 SELECT_MASK(drive, 0);
798 enable_irq(hwif->irq);
801 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
805 drive->id->dma_ultra &= ~0xFF00;
806 drive->id->dma_mword &= ~0x0F00;
807 drive->id->dma_1word &= ~0x0F00;
810 #ifdef CONFIG_BLK_DEV_IDEDMA
811 if (speed >= XFER_SW_DMA_0 && drive->using_dma)
812 hwif->dma_ops->dma_host_set(drive, 1);
813 else if (hwif->dma_ops) /* check if host supports DMA */
814 ide_dma_off_quietly(drive);
818 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
819 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
820 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
821 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
822 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
823 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
824 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
825 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
826 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
827 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
828 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
829 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
830 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
831 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
834 if (!drive->init_speed)
835 drive->init_speed = speed;
836 drive->current_speed = speed;
841 * This should get invoked any time we exit the driver to
842 * wait for an interrupt response from a drive. handler() points
843 * at the appropriate code to handle the next interrupt, and a
844 * timer is started to prevent us from waiting forever in case
845 * something goes wrong (see the ide_timer_expiry() handler later on).
847 * See also ide_execute_command
849 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
850 unsigned int timeout, ide_expiry_t *expiry)
852 ide_hwgroup_t *hwgroup = HWGROUP(drive);
854 BUG_ON(hwgroup->handler);
855 hwgroup->handler = handler;
856 hwgroup->expiry = expiry;
857 hwgroup->timer.expires = jiffies + timeout;
858 hwgroup->req_gen_timer = hwgroup->req_gen;
859 add_timer(&hwgroup->timer);
862 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
863 unsigned int timeout, ide_expiry_t *expiry)
866 spin_lock_irqsave(&ide_lock, flags);
867 __ide_set_handler(drive, handler, timeout, expiry);
868 spin_unlock_irqrestore(&ide_lock, flags);
871 EXPORT_SYMBOL(ide_set_handler);
874 * ide_execute_command - execute an IDE command
875 * @drive: IDE drive to issue the command against
876 * @command: command byte to write
877 * @handler: handler for next phase
878 * @timeout: timeout for command
879 * @expiry: handler to run on timeout
881 * Helper function to issue an IDE command. This handles the
882 * atomicity requirements, command timing and ensures that the
883 * handler and IRQ setup do not race. All IDE command kick off
884 * should go via this function or do equivalent locking.
887 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
888 unsigned timeout, ide_expiry_t *expiry)
891 ide_hwif_t *hwif = HWIF(drive);
893 spin_lock_irqsave(&ide_lock, flags);
894 __ide_set_handler(drive, handler, timeout, expiry);
895 hwif->tp_ops->exec_command(hwif, cmd);
897 * Drive takes 400nS to respond, we must avoid the IRQ being
898 * serviced before that.
900 * FIXME: we could skip this delay with care on non shared devices
903 spin_unlock_irqrestore(&ide_lock, flags);
905 EXPORT_SYMBOL(ide_execute_command);
907 void ide_execute_pkt_cmd(ide_drive_t *drive)
909 ide_hwif_t *hwif = drive->hwif;
912 spin_lock_irqsave(&ide_lock, flags);
913 hwif->tp_ops->exec_command(hwif, WIN_PACKETCMD);
915 spin_unlock_irqrestore(&ide_lock, flags);
917 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
919 static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
921 struct request *rq = drive->hwif->hwgroup->rq;
923 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
924 ide_end_request(drive, err ? err : 1, 0);
928 static ide_startstop_t do_reset1 (ide_drive_t *, int);
931 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
932 * during an atapi drive reset operation. If the drive has not yet responded,
933 * and we have not yet hit our maximum waiting time, then the timer is restarted
936 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
938 ide_hwif_t *hwif = drive->hwif;
939 ide_hwgroup_t *hwgroup = hwif->hwgroup;
944 stat = hwif->tp_ops->read_status(hwif);
946 if (OK_STAT(stat, 0, BUSY_STAT))
947 printk("%s: ATAPI reset complete\n", drive->name);
949 if (time_before(jiffies, hwgroup->poll_timeout)) {
950 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
951 /* continue polling */
955 hwgroup->polling = 0;
956 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
958 /* do it the old fashioned way */
959 return do_reset1(drive, 1);
962 hwgroup->polling = 0;
963 ide_complete_drive_reset(drive, 0);
968 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
969 * during an ide reset operation. If the drives have not yet responded,
970 * and we have not yet hit our maximum waiting time, then the timer is restarted
973 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
975 ide_hwgroup_t *hwgroup = HWGROUP(drive);
976 ide_hwif_t *hwif = HWIF(drive);
977 const struct ide_port_ops *port_ops = hwif->port_ops;
981 if (port_ops && port_ops->reset_poll) {
982 err = port_ops->reset_poll(drive);
984 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
985 hwif->name, drive->name);
990 tmp = hwif->tp_ops->read_status(hwif);
992 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
993 if (time_before(jiffies, hwgroup->poll_timeout)) {
994 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
995 /* continue polling */
998 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1002 printk("%s: reset: ", hwif->name);
1003 tmp = ide_read_error(drive);
1006 printk("success\n");
1007 drive->failures = 0;
1011 switch (tmp & 0x7f) {
1012 case 1: printk("passed");
1014 case 2: printk("formatter device error");
1016 case 3: printk("sector buffer error");
1018 case 4: printk("ECC circuitry error");
1020 case 5: printk("controlling MPU error");
1022 default:printk("error (0x%02x?)", tmp);
1025 printk("; slave: failed");
1031 hwgroup->polling = 0; /* done polling */
1032 ide_complete_drive_reset(drive, err);
1036 static void ide_disk_pre_reset(ide_drive_t *drive)
1038 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1040 drive->special.all = 0;
1041 drive->special.b.set_geometry = legacy;
1042 drive->special.b.recalibrate = legacy;
1043 drive->mult_count = 0;
1044 if (!drive->keep_settings && !drive->using_dma)
1045 drive->mult_req = 0;
1046 if (drive->mult_req != drive->mult_count)
1047 drive->special.b.set_multmode = 1;
1050 static void pre_reset(ide_drive_t *drive)
1052 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1054 if (drive->media == ide_disk)
1055 ide_disk_pre_reset(drive);
1057 drive->post_reset = 1;
1059 if (drive->using_dma) {
1060 if (drive->crc_count)
1061 ide_check_dma_crc(drive);
1066 if (!drive->keep_settings) {
1067 if (!drive->using_dma) {
1069 drive->io_32bit = 0;
1074 if (port_ops && port_ops->pre_reset)
1075 port_ops->pre_reset(drive);
1077 if (drive->current_speed != 0xff)
1078 drive->desired_speed = drive->current_speed;
1079 drive->current_speed = 0xff;
1083 * do_reset1() attempts to recover a confused drive by resetting it.
1084 * Unfortunately, resetting a disk drive actually resets all devices on
1085 * the same interface, so it can really be thought of as resetting the
1086 * interface rather than resetting the drive.
1088 * ATAPI devices have their own reset mechanism which allows them to be
1089 * individually reset without clobbering other devices on the same interface.
1091 * Unfortunately, the IDE interface does not generate an interrupt to let
1092 * us know when the reset operation has finished, so we must poll for this.
1093 * Equally poor, though, is the fact that this may a very long time to complete,
1094 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1095 * we set a timer to poll at 50ms intervals.
1097 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1100 unsigned long flags;
1102 ide_hwgroup_t *hwgroup;
1103 struct ide_io_ports *io_ports;
1104 const struct ide_tp_ops *tp_ops;
1105 const struct ide_port_ops *port_ops;
1107 spin_lock_irqsave(&ide_lock, flags);
1109 hwgroup = HWGROUP(drive);
1111 io_ports = &hwif->io_ports;
1113 tp_ops = hwif->tp_ops;
1115 /* We must not reset with running handlers */
1116 BUG_ON(hwgroup->handler != NULL);
1118 /* For an ATAPI device, first try an ATAPI SRST. */
1119 if (drive->media != ide_disk && !do_not_try_atapi) {
1121 SELECT_DRIVE(drive);
1123 tp_ops->exec_command(hwif, WIN_SRST);
1125 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1126 hwgroup->polling = 1;
1127 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1128 spin_unlock_irqrestore(&ide_lock, flags);
1133 * First, reset any device state data we were maintaining
1134 * for any of the drives on this interface.
1136 for (unit = 0; unit < MAX_DRIVES; ++unit)
1137 pre_reset(&hwif->drives[unit]);
1139 if (io_ports->ctl_addr == 0) {
1140 spin_unlock_irqrestore(&ide_lock, flags);
1141 ide_complete_drive_reset(drive, -ENXIO);
1146 * Note that we also set nIEN while resetting the device,
1147 * to mask unwanted interrupts from the interface during the reset.
1148 * However, due to the design of PC hardware, this will cause an
1149 * immediate interrupt due to the edge transition it produces.
1150 * This single interrupt gives us a "fast poll" for drives that
1151 * recover from reset very quickly, saving us the first 50ms wait time.
1153 * TODO: add ->softreset method and stop abusing ->set_irq
1155 /* set SRST and nIEN */
1156 tp_ops->set_irq(hwif, 4);
1157 /* more than enough time */
1159 /* clear SRST, leave nIEN (unless device is on the quirk list) */
1160 tp_ops->set_irq(hwif, drive->quirk_list == 2);
1161 /* more than enough time */
1163 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1164 hwgroup->polling = 1;
1165 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1168 * Some weird controller like resetting themselves to a strange
1169 * state when the disks are reset this way. At least, the Winbond
1170 * 553 documentation says that
1172 port_ops = hwif->port_ops;
1173 if (port_ops && port_ops->resetproc)
1174 port_ops->resetproc(drive);
1176 spin_unlock_irqrestore(&ide_lock, flags);
1181 * ide_do_reset() is the entry point to the drive/interface reset code.
1184 ide_startstop_t ide_do_reset (ide_drive_t *drive)
1186 return do_reset1(drive, 0);
1189 EXPORT_SYMBOL(ide_do_reset);
1192 * ide_wait_not_busy() waits for the currently selected device on the hwif
1193 * to report a non-busy status, see comments in ide_probe_port().
1195 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1201 * Turn this into a schedule() sleep once I'm sure
1202 * about locking issues (2.5 work ?).
1205 stat = hwif->tp_ops->read_status(hwif);
1206 if ((stat & BUSY_STAT) == 0)
1209 * Assume a value of 0xff means nothing is connected to
1210 * the interface and it doesn't implement the pull-down
1215 touch_softlockup_watchdog();
1216 touch_nmi_watchdog();
1221 EXPORT_SYMBOL_GPL(ide_wait_not_busy);