2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
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/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
25 #include <asm/byteorder.h>
27 #include <asm/uaccess.h>
31 * Conventional PIO operations for ATA devices
34 static u8 ide_inb (unsigned long port)
36 return (u8) inb(port);
39 static void ide_outb (u8 val, unsigned long port)
45 * MMIO operations, typically used for SATA controllers
48 static u8 ide_mm_inb (unsigned long port)
50 return (u8) readb((void __iomem *) port);
53 static void ide_mm_outb (u8 value, unsigned long port)
55 writeb(value, (void __iomem *) port);
58 void SELECT_DRIVE (ide_drive_t *drive)
60 ide_hwif_t *hwif = drive->hwif;
61 const struct ide_port_ops *port_ops = hwif->port_ops;
64 if (port_ops && port_ops->selectproc)
65 port_ops->selectproc(drive);
67 memset(&task, 0, sizeof(task));
68 task.tf_flags = IDE_TFLAG_OUT_DEVICE;
70 drive->hwif->tp_ops->tf_load(drive, &task);
73 void SELECT_MASK(ide_drive_t *drive, int mask)
75 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
77 if (port_ops && port_ops->maskproc)
78 port_ops->maskproc(drive, mask);
81 void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
83 if (hwif->host_flags & IDE_HFLAG_MMIO)
84 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
86 outb(cmd, hwif->io_ports.command_addr);
88 EXPORT_SYMBOL_GPL(ide_exec_command);
90 u8 ide_read_status(ide_hwif_t *hwif)
92 if (hwif->host_flags & IDE_HFLAG_MMIO)
93 return readb((void __iomem *)hwif->io_ports.status_addr);
95 return inb(hwif->io_ports.status_addr);
97 EXPORT_SYMBOL_GPL(ide_read_status);
99 u8 ide_read_altstatus(ide_hwif_t *hwif)
101 if (hwif->host_flags & IDE_HFLAG_MMIO)
102 return readb((void __iomem *)hwif->io_ports.ctl_addr);
104 return inb(hwif->io_ports.ctl_addr);
106 EXPORT_SYMBOL_GPL(ide_read_altstatus);
108 u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
110 if (hwif->host_flags & IDE_HFLAG_MMIO)
111 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
113 return inb(hwif->dma_base + ATA_DMA_STATUS);
115 EXPORT_SYMBOL_GPL(ide_read_sff_dma_status);
117 void ide_set_irq(ide_hwif_t *hwif, int on)
119 u8 ctl = ATA_DEVCTL_OBS;
121 if (on == 4) { /* hack for SRST */
128 if (hwif->host_flags & IDE_HFLAG_MMIO)
129 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
131 outb(ctl, hwif->io_ports.ctl_addr);
133 EXPORT_SYMBOL_GPL(ide_set_irq);
135 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
137 ide_hwif_t *hwif = drive->hwif;
138 struct ide_io_ports *io_ports = &hwif->io_ports;
139 struct ide_taskfile *tf = &task->tf;
140 void (*tf_outb)(u8 addr, unsigned long port);
141 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
142 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
145 tf_outb = ide_mm_outb;
149 if (task->tf_flags & IDE_TFLAG_FLAGGED)
152 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
153 u16 data = (tf->hob_data << 8) | tf->data;
156 writew(data, (void __iomem *)io_ports->data_addr);
158 outw(data, io_ports->data_addr);
161 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
162 tf_outb(tf->hob_feature, io_ports->feature_addr);
163 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
164 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
165 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
166 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
167 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
168 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
169 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
170 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
172 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
173 tf_outb(tf->feature, io_ports->feature_addr);
174 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
175 tf_outb(tf->nsect, io_ports->nsect_addr);
176 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
177 tf_outb(tf->lbal, io_ports->lbal_addr);
178 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
179 tf_outb(tf->lbam, io_ports->lbam_addr);
180 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
181 tf_outb(tf->lbah, io_ports->lbah_addr);
183 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
184 tf_outb((tf->device & HIHI) | drive->select,
185 io_ports->device_addr);
187 EXPORT_SYMBOL_GPL(ide_tf_load);
189 void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
191 ide_hwif_t *hwif = drive->hwif;
192 struct ide_io_ports *io_ports = &hwif->io_ports;
193 struct ide_taskfile *tf = &task->tf;
194 void (*tf_outb)(u8 addr, unsigned long port);
195 u8 (*tf_inb)(unsigned long port);
196 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
199 tf_outb = ide_mm_outb;
206 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
210 data = readw((void __iomem *)io_ports->data_addr);
212 data = inw(io_ports->data_addr);
214 tf->data = data & 0xff;
215 tf->hob_data = (data >> 8) & 0xff;
218 /* be sure we're looking at the low order bits */
219 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
221 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
222 tf->feature = tf_inb(io_ports->feature_addr);
223 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
224 tf->nsect = tf_inb(io_ports->nsect_addr);
225 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
226 tf->lbal = tf_inb(io_ports->lbal_addr);
227 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
228 tf->lbam = tf_inb(io_ports->lbam_addr);
229 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
230 tf->lbah = tf_inb(io_ports->lbah_addr);
231 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
232 tf->device = tf_inb(io_ports->device_addr);
234 if (task->tf_flags & IDE_TFLAG_LBA48) {
235 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
237 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
238 tf->hob_feature = tf_inb(io_ports->feature_addr);
239 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
240 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
241 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
242 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
243 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
244 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
245 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
246 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
249 EXPORT_SYMBOL_GPL(ide_tf_read);
252 * Some localbus EIDE interfaces require a special access sequence
253 * when using 32-bit I/O instructions to transfer data. We call this
254 * the "vlb_sync" sequence, which consists of three successive reads
255 * of the sector count register location, with interrupts disabled
256 * to ensure that the reads all happen together.
258 static void ata_vlb_sync(unsigned long port)
266 * This is used for most PIO data transfers *from* the IDE interface
268 * These routines will round up any request for an odd number of bytes,
269 * so if an odd len is specified, be sure that there's at least one
270 * extra byte allocated for the buffer.
272 void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
275 ide_hwif_t *hwif = drive->hwif;
276 struct ide_io_ports *io_ports = &hwif->io_ports;
277 unsigned long data_addr = io_ports->data_addr;
278 u8 io_32bit = drive->io_32bit;
279 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
284 unsigned long uninitialized_var(flags);
286 if ((io_32bit & 2) && !mmio) {
287 local_irq_save(flags);
288 ata_vlb_sync(io_ports->nsect_addr);
292 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
294 insl(data_addr, buf, len / 4);
296 if ((io_32bit & 2) && !mmio)
297 local_irq_restore(flags);
299 if ((len & 3) >= 2) {
301 __ide_mm_insw((void __iomem *)data_addr,
302 (u8 *)buf + (len & ~3), 1);
304 insw(data_addr, (u8 *)buf + (len & ~3), 1);
308 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
310 insw(data_addr, buf, len / 2);
313 EXPORT_SYMBOL_GPL(ide_input_data);
316 * This is used for most PIO data transfers *to* the IDE interface
318 void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
321 ide_hwif_t *hwif = drive->hwif;
322 struct ide_io_ports *io_ports = &hwif->io_ports;
323 unsigned long data_addr = io_ports->data_addr;
324 u8 io_32bit = drive->io_32bit;
325 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
328 unsigned long uninitialized_var(flags);
330 if ((io_32bit & 2) && !mmio) {
331 local_irq_save(flags);
332 ata_vlb_sync(io_ports->nsect_addr);
336 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
338 outsl(data_addr, buf, len / 4);
340 if ((io_32bit & 2) && !mmio)
341 local_irq_restore(flags);
343 if ((len & 3) >= 2) {
345 __ide_mm_outsw((void __iomem *)data_addr,
346 (u8 *)buf + (len & ~3), 1);
348 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
352 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
354 outsw(data_addr, buf, len / 2);
357 EXPORT_SYMBOL_GPL(ide_output_data);
359 u8 ide_read_error(ide_drive_t *drive)
363 memset(&task, 0, sizeof(task));
364 task.tf_flags = IDE_TFLAG_IN_FEATURE;
366 drive->hwif->tp_ops->tf_read(drive, &task);
368 return task.tf.error;
370 EXPORT_SYMBOL_GPL(ide_read_error);
372 void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
376 memset(&task, 0, sizeof(task));
377 task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
380 drive->hwif->tp_ops->tf_read(drive, &task);
382 *bcount = (task.tf.lbah << 8) | task.tf.lbam;
383 *ireason = task.tf.nsect & 3;
385 EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
387 const struct ide_tp_ops default_tp_ops = {
388 .exec_command = ide_exec_command,
389 .read_status = ide_read_status,
390 .read_altstatus = ide_read_altstatus,
391 .read_sff_dma_status = ide_read_sff_dma_status,
393 .set_irq = ide_set_irq,
395 .tf_load = ide_tf_load,
396 .tf_read = ide_tf_read,
398 .input_data = ide_input_data,
399 .output_data = ide_output_data,
402 void ide_fix_driveid(u16 *id)
404 #ifndef __LITTLE_ENDIAN
408 for (i = 0; i < 256; i++)
409 id[i] = __le16_to_cpu(id[i]);
411 # error "Please fix <asm/byteorder.h>"
417 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
418 * removing leading/trailing blanks and compressing internal blanks.
419 * It is primarily used to tidy up the model name/number fields as
420 * returned by the ATA_CMD_ID_ATA[PI] commands.
423 void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
425 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
428 /* convert from big-endian to host byte order */
429 for (p = s ; p != end ; p += 2)
430 be16_to_cpus((u16 *) p);
433 /* strip leading blanks */
435 while (s != end && *s == ' ')
437 /* compress internal blanks and strip trailing blanks */
438 while (s != end && *s) {
439 if (*s++ != ' ' || (s != end && *s && *s != ' '))
442 /* wipe out trailing garbage */
447 EXPORT_SYMBOL(ide_fixstring);
450 * Needed for PCI irq sharing
452 int drive_is_ready (ide_drive_t *drive)
454 ide_hwif_t *hwif = HWIF(drive);
457 if (drive->waiting_for_dma)
458 return hwif->dma_ops->dma_test_irq(drive);
461 /* need to guarantee 400ns since last command was issued */
466 * We do a passive status test under shared PCI interrupts on
467 * cards that truly share the ATA side interrupt, but may also share
468 * an interrupt with another pci card/device. We make no assumptions
469 * about possible isa-pnp and pci-pnp issues yet.
471 if (hwif->io_ports.ctl_addr)
472 stat = hwif->tp_ops->read_altstatus(hwif);
474 /* Note: this may clear a pending IRQ!! */
475 stat = hwif->tp_ops->read_status(hwif);
478 /* drive busy: definitely not interrupting */
481 /* drive ready: *might* be interrupting */
485 EXPORT_SYMBOL(drive_is_ready);
488 * This routine busy-waits for the drive status to be not "busy".
489 * It then checks the status for all of the "good" bits and none
490 * of the "bad" bits, and if all is okay it returns 0. All other
491 * cases return error -- caller may then invoke ide_error().
493 * This routine should get fixed to not hog the cpu during extra long waits..
494 * That could be done by busy-waiting for the first jiffy or two, and then
495 * setting a timer to wake up at half second intervals thereafter,
496 * until timeout is achieved, before timing out.
498 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
500 ide_hwif_t *hwif = drive->hwif;
501 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
506 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
507 stat = tp_ops->read_status(hwif);
509 if (stat & ATA_BUSY) {
510 local_irq_set(flags);
512 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
513 if (time_after(jiffies, timeout)) {
515 * One last read after the timeout in case
516 * heavy interrupt load made us not make any
517 * progress during the timeout..
519 stat = tp_ops->read_status(hwif);
520 if ((stat & ATA_BUSY) == 0)
523 local_irq_restore(flags);
528 local_irq_restore(flags);
531 * Allow status to settle, then read it again.
532 * A few rare drives vastly violate the 400ns spec here,
533 * so we'll wait up to 10usec for a "good" status
534 * rather than expensively fail things immediately.
535 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
537 for (i = 0; i < 10; i++) {
539 stat = tp_ops->read_status(hwif);
541 if (OK_STAT(stat, good, bad)) {
551 * In case of error returns error value after doing "*startstop = ide_error()".
552 * The caller should return the updated value of "startstop" in this case,
553 * "startstop" is unchanged when the function returns 0.
555 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
560 /* bail early if we've exceeded max_failures */
561 if (drive->max_failures && (drive->failures > drive->max_failures)) {
562 *startstop = ide_stopped;
566 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
569 char *s = (err == -EBUSY) ? "status timeout" : "status error";
570 *startstop = ide_error(drive, s, stat);
576 EXPORT_SYMBOL(ide_wait_stat);
579 * ide_in_drive_list - look for drive in black/white list
580 * @id: drive identifier
581 * @table: list to inspect
583 * Look for a drive in the blacklist and the whitelist tables
584 * Returns 1 if the drive is found in the table.
587 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
589 for ( ; table->id_model; table++)
590 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
591 (!table->id_firmware ||
592 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
597 EXPORT_SYMBOL_GPL(ide_in_drive_list);
600 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
601 * We list them here and depend on the device side cable detection for them.
603 * Some optical devices with the buggy firmwares have the same problem.
605 static const struct drive_list_entry ivb_list[] = {
606 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
607 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
608 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
609 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
610 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
611 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
612 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
617 * All hosts that use the 80c ribbon must use!
618 * The name is derived from upper byte of word 93 and the 80c ribbon.
620 u8 eighty_ninty_three (ide_drive_t *drive)
622 ide_hwif_t *hwif = drive->hwif;
624 int ivb = ide_in_drive_list(id, ivb_list);
626 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
630 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
633 if (ata_id_is_sata(id) && !ivb)
636 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
641 * - change master/slave IDENTIFY order
642 * - force bit13 (80c cable present) check also for !ivb devices
643 * (unless the slave device is pre-ATA3)
645 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
646 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
650 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
653 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
654 "limiting max speed to UDMA33\n",
656 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
658 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
663 int ide_driveid_update(ide_drive_t *drive)
665 ide_hwif_t *hwif = drive->hwif;
666 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
672 * Re-read drive->id for possible DMA mode
673 * change (copied from ide-probe.c)
676 SELECT_MASK(drive, 1);
677 tp_ops->set_irq(hwif, 0);
679 tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
681 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
682 SELECT_MASK(drive, 0);
686 msleep(50); /* wait for IRQ and ATA_DRQ */
687 stat = tp_ops->read_status(hwif);
689 if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) {
690 SELECT_MASK(drive, 0);
691 printk("%s: CHECK for good STATUS\n", drive->name);
694 local_irq_save(flags);
695 SELECT_MASK(drive, 0);
696 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
698 local_irq_restore(flags);
701 tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
702 (void)tp_ops->read_status(hwif); /* clear drive IRQ */
704 local_irq_restore(flags);
707 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
708 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
709 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
710 /* anything more ? */
714 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
720 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
722 ide_hwif_t *hwif = drive->hwif;
723 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
724 u16 *id = drive->id, i;
729 #ifdef CONFIG_BLK_DEV_IDEDMA
730 if (hwif->dma_ops) /* check if host supports DMA */
731 hwif->dma_ops->dma_host_set(drive, 0);
734 /* Skip setting PIO flow-control modes on pre-EIDE drives */
735 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
739 * Don't use ide_wait_cmd here - it will
740 * attempt to set_geometry and recalibrate,
741 * but for some reason these don't work at
742 * this point (lost interrupt).
745 * Select the drive, and issue the SETFEATURES command
747 disable_irq_nosync(hwif->irq);
750 * FIXME: we race against the running IRQ here if
751 * this is called from non IRQ context. If we use
752 * disable_irq() we hang on the error path. Work
758 SELECT_MASK(drive, 1);
760 tp_ops->set_irq(hwif, 0);
762 memset(&task, 0, sizeof(task));
763 task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
764 task.tf.feature = SETFEATURES_XFER;
765 task.tf.nsect = speed;
767 tp_ops->tf_load(drive, &task);
769 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
771 if (drive->quirk_list == 2)
772 tp_ops->set_irq(hwif, 1);
774 error = __ide_wait_stat(drive, drive->ready_stat,
775 ATA_BUSY | ATA_DRQ | ATA_ERR,
778 SELECT_MASK(drive, 0);
780 enable_irq(hwif->irq);
783 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
787 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
788 id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
789 id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
792 #ifdef CONFIG_BLK_DEV_IDEDMA
793 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
794 hwif->dma_ops->dma_host_set(drive, 1);
795 else if (hwif->dma_ops) /* check if host supports DMA */
796 ide_dma_off_quietly(drive);
799 if (speed >= XFER_UDMA_0) {
800 i = 1 << (speed - XFER_UDMA_0);
801 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
802 } else if (speed >= XFER_MW_DMA_0) {
803 i = 1 << (speed - XFER_MW_DMA_0);
804 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
805 } else if (speed >= XFER_SW_DMA_0) {
806 i = 1 << (speed - XFER_SW_DMA_0);
807 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
810 if (!drive->init_speed)
811 drive->init_speed = speed;
812 drive->current_speed = speed;
817 * This should get invoked any time we exit the driver to
818 * wait for an interrupt response from a drive. handler() points
819 * at the appropriate code to handle the next interrupt, and a
820 * timer is started to prevent us from waiting forever in case
821 * something goes wrong (see the ide_timer_expiry() handler later on).
823 * See also ide_execute_command
825 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
826 unsigned int timeout, ide_expiry_t *expiry)
828 ide_hwgroup_t *hwgroup = HWGROUP(drive);
830 BUG_ON(hwgroup->handler);
831 hwgroup->handler = handler;
832 hwgroup->expiry = expiry;
833 hwgroup->timer.expires = jiffies + timeout;
834 hwgroup->req_gen_timer = hwgroup->req_gen;
835 add_timer(&hwgroup->timer);
838 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
839 unsigned int timeout, ide_expiry_t *expiry)
842 spin_lock_irqsave(&ide_lock, flags);
843 __ide_set_handler(drive, handler, timeout, expiry);
844 spin_unlock_irqrestore(&ide_lock, flags);
847 EXPORT_SYMBOL(ide_set_handler);
850 * ide_execute_command - execute an IDE command
851 * @drive: IDE drive to issue the command against
852 * @command: command byte to write
853 * @handler: handler for next phase
854 * @timeout: timeout for command
855 * @expiry: handler to run on timeout
857 * Helper function to issue an IDE command. This handles the
858 * atomicity requirements, command timing and ensures that the
859 * handler and IRQ setup do not race. All IDE command kick off
860 * should go via this function or do equivalent locking.
863 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
864 unsigned timeout, ide_expiry_t *expiry)
867 ide_hwif_t *hwif = HWIF(drive);
869 spin_lock_irqsave(&ide_lock, flags);
870 __ide_set_handler(drive, handler, timeout, expiry);
871 hwif->tp_ops->exec_command(hwif, cmd);
873 * Drive takes 400nS to respond, we must avoid the IRQ being
874 * serviced before that.
876 * FIXME: we could skip this delay with care on non shared devices
879 spin_unlock_irqrestore(&ide_lock, flags);
881 EXPORT_SYMBOL(ide_execute_command);
883 void ide_execute_pkt_cmd(ide_drive_t *drive)
885 ide_hwif_t *hwif = drive->hwif;
888 spin_lock_irqsave(&ide_lock, flags);
889 hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET);
891 spin_unlock_irqrestore(&ide_lock, flags);
893 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
895 static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
897 struct request *rq = drive->hwif->hwgroup->rq;
899 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
900 ide_end_request(drive, err ? err : 1, 0);
904 static ide_startstop_t do_reset1 (ide_drive_t *, int);
907 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
908 * during an atapi drive reset operation. If the drive has not yet responded,
909 * and we have not yet hit our maximum waiting time, then the timer is restarted
912 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
914 ide_hwif_t *hwif = drive->hwif;
915 ide_hwgroup_t *hwgroup = hwif->hwgroup;
920 stat = hwif->tp_ops->read_status(hwif);
922 if (OK_STAT(stat, 0, ATA_BUSY))
923 printk("%s: ATAPI reset complete\n", drive->name);
925 if (time_before(jiffies, hwgroup->poll_timeout)) {
926 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
927 /* continue polling */
931 hwgroup->polling = 0;
932 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
934 /* do it the old fashioned way */
935 return do_reset1(drive, 1);
938 hwgroup->polling = 0;
939 ide_complete_drive_reset(drive, 0);
943 static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
945 static const char *err_master_vals[] =
946 { NULL, "passed", "formatter device error",
947 "sector buffer error", "ECC circuitry error",
948 "controlling MPU error" };
950 u8 err_master = err & 0x7f;
952 printk(KERN_ERR "%s: reset: master: ", hwif->name);
953 if (err_master && err_master < 6)
954 printk(KERN_CONT "%s", err_master_vals[err_master]);
956 printk(KERN_CONT "error (0x%02x?)", err);
958 printk(KERN_CONT "; slave: failed");
959 printk(KERN_CONT "\n");
963 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
964 * during an ide reset operation. If the drives have not yet responded,
965 * and we have not yet hit our maximum waiting time, then the timer is restarted
968 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
970 ide_hwgroup_t *hwgroup = HWGROUP(drive);
971 ide_hwif_t *hwif = HWIF(drive);
972 const struct ide_port_ops *port_ops = hwif->port_ops;
976 if (port_ops && port_ops->reset_poll) {
977 err = port_ops->reset_poll(drive);
979 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
980 hwif->name, drive->name);
985 tmp = hwif->tp_ops->read_status(hwif);
987 if (!OK_STAT(tmp, 0, ATA_BUSY)) {
988 if (time_before(jiffies, hwgroup->poll_timeout)) {
989 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
990 /* continue polling */
993 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
997 tmp = ide_read_error(drive);
1000 printk(KERN_INFO "%s: reset: success\n", hwif->name);
1001 drive->failures = 0;
1003 ide_reset_report_error(hwif, tmp);
1009 hwgroup->polling = 0; /* done polling */
1010 ide_complete_drive_reset(drive, err);
1014 static void ide_disk_pre_reset(ide_drive_t *drive)
1016 int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
1018 drive->special.all = 0;
1019 drive->special.b.set_geometry = legacy;
1020 drive->special.b.recalibrate = legacy;
1022 drive->mult_count = 0;
1023 drive->dev_flags &= ~IDE_DFLAG_PARKED;
1025 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
1026 (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
1027 drive->mult_req = 0;
1029 if (drive->mult_req != drive->mult_count)
1030 drive->special.b.set_multmode = 1;
1033 static void pre_reset(ide_drive_t *drive)
1035 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1037 if (drive->media == ide_disk)
1038 ide_disk_pre_reset(drive);
1040 drive->dev_flags |= IDE_DFLAG_POST_RESET;
1042 if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
1043 if (drive->crc_count)
1044 ide_check_dma_crc(drive);
1049 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
1050 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
1051 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
1052 drive->io_32bit = 0;
1057 if (port_ops && port_ops->pre_reset)
1058 port_ops->pre_reset(drive);
1060 if (drive->current_speed != 0xff)
1061 drive->desired_speed = drive->current_speed;
1062 drive->current_speed = 0xff;
1066 * do_reset1() attempts to recover a confused drive by resetting it.
1067 * Unfortunately, resetting a disk drive actually resets all devices on
1068 * the same interface, so it can really be thought of as resetting the
1069 * interface rather than resetting the drive.
1071 * ATAPI devices have their own reset mechanism which allows them to be
1072 * individually reset without clobbering other devices on the same interface.
1074 * Unfortunately, the IDE interface does not generate an interrupt to let
1075 * us know when the reset operation has finished, so we must poll for this.
1076 * Equally poor, though, is the fact that this may a very long time to complete,
1077 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1078 * we set a timer to poll at 50ms intervals.
1080 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1083 unsigned long flags, timeout;
1085 ide_hwgroup_t *hwgroup;
1086 struct ide_io_ports *io_ports;
1087 const struct ide_tp_ops *tp_ops;
1088 const struct ide_port_ops *port_ops;
1091 spin_lock_irqsave(&ide_lock, flags);
1093 hwgroup = HWGROUP(drive);
1095 io_ports = &hwif->io_ports;
1097 tp_ops = hwif->tp_ops;
1099 /* We must not reset with running handlers */
1100 BUG_ON(hwgroup->handler != NULL);
1102 /* For an ATAPI device, first try an ATAPI SRST. */
1103 if (drive->media != ide_disk && !do_not_try_atapi) {
1105 SELECT_DRIVE(drive);
1107 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
1109 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1110 hwgroup->polling = 1;
1111 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1112 spin_unlock_irqrestore(&ide_lock, flags);
1116 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
1120 prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
1122 for (unit = 0; unit < MAX_DRIVES; unit++) {
1123 ide_drive_t *tdrive = &hwif->drives[unit];
1125 if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
1126 tdrive->dev_flags & IDE_DFLAG_PARKED &&
1127 time_after(tdrive->sleep, timeout))
1128 timeout = tdrive->sleep;
1132 if (time_before_eq(timeout, now))
1135 spin_unlock_irqrestore(&ide_lock, flags);
1136 timeout = schedule_timeout_uninterruptible(timeout - now);
1137 spin_lock_irqsave(&ide_lock, flags);
1139 finish_wait(&ide_park_wq, &wait);
1142 * First, reset any device state data we were maintaining
1143 * for any of the drives on this interface.
1145 for (unit = 0; unit < MAX_DRIVES; ++unit)
1146 pre_reset(&hwif->drives[unit]);
1148 if (io_ports->ctl_addr == 0) {
1149 spin_unlock_irqrestore(&ide_lock, flags);
1150 ide_complete_drive_reset(drive, -ENXIO);
1155 * Note that we also set nIEN while resetting the device,
1156 * to mask unwanted interrupts from the interface during the reset.
1157 * However, due to the design of PC hardware, this will cause an
1158 * immediate interrupt due to the edge transition it produces.
1159 * This single interrupt gives us a "fast poll" for drives that
1160 * recover from reset very quickly, saving us the first 50ms wait time.
1162 * TODO: add ->softreset method and stop abusing ->set_irq
1164 /* set SRST and nIEN */
1165 tp_ops->set_irq(hwif, 4);
1166 /* more than enough time */
1168 /* clear SRST, leave nIEN (unless device is on the quirk list) */
1169 tp_ops->set_irq(hwif, drive->quirk_list == 2);
1170 /* more than enough time */
1172 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1173 hwgroup->polling = 1;
1174 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1177 * Some weird controller like resetting themselves to a strange
1178 * state when the disks are reset this way. At least, the Winbond
1179 * 553 documentation says that
1181 port_ops = hwif->port_ops;
1182 if (port_ops && port_ops->resetproc)
1183 port_ops->resetproc(drive);
1185 spin_unlock_irqrestore(&ide_lock, flags);
1190 * ide_do_reset() is the entry point to the drive/interface reset code.
1193 ide_startstop_t ide_do_reset (ide_drive_t *drive)
1195 return do_reset1(drive, 0);
1198 EXPORT_SYMBOL(ide_do_reset);
1201 * ide_wait_not_busy() waits for the currently selected device on the hwif
1202 * to report a non-busy status, see comments in ide_probe_port().
1204 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1210 * Turn this into a schedule() sleep once I'm sure
1211 * about locking issues (2.5 work ?).
1214 stat = hwif->tp_ops->read_status(hwif);
1215 if ((stat & ATA_BUSY) == 0)
1218 * Assume a value of 0xff means nothing is connected to
1219 * the interface and it doesn't implement the pull-down
1224 touch_softlockup_watchdog();
1225 touch_nmi_watchdog();
1230 EXPORT_SYMBOL_GPL(ide_wait_not_busy);