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)
45 static void ide_outbsync(ide_hwif_t *hwif, u8 addr, unsigned long port)
50 void default_hwif_iops (ide_hwif_t *hwif)
52 hwif->OUTB = ide_outb;
53 hwif->OUTBSYNC = ide_outbsync;
58 * MMIO operations, typically used for SATA controllers
61 static u8 ide_mm_inb (unsigned long port)
63 return (u8) readb((void __iomem *) port);
66 static void ide_mm_outb (u8 value, unsigned long port)
68 writeb(value, (void __iomem *) port);
71 static void ide_mm_outbsync(ide_hwif_t *hwif, u8 value, unsigned long port)
73 writeb(value, (void __iomem *) port);
76 void default_hwif_mmiops (ide_hwif_t *hwif)
78 hwif->OUTB = ide_mm_outb;
79 /* Most systems will need to override OUTBSYNC, alas however
80 this one is controller specific! */
81 hwif->OUTBSYNC = ide_mm_outbsync;
82 hwif->INB = ide_mm_inb;
85 EXPORT_SYMBOL(default_hwif_mmiops);
87 void SELECT_DRIVE (ide_drive_t *drive)
89 ide_hwif_t *hwif = drive->hwif;
90 const struct ide_port_ops *port_ops = hwif->port_ops;
92 if (port_ops && port_ops->selectproc)
93 port_ops->selectproc(drive);
95 hwif->OUTB(drive->select.all, hwif->io_ports.device_addr);
98 void SELECT_MASK(ide_drive_t *drive, int mask)
100 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
102 if (port_ops && port_ops->maskproc)
103 port_ops->maskproc(drive, mask);
106 static void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
108 if (hwif->host_flags & IDE_HFLAG_MMIO)
109 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
111 outb(cmd, hwif->io_ports.command_addr);
114 static u8 ide_read_status(ide_hwif_t *hwif)
116 if (hwif->host_flags & IDE_HFLAG_MMIO)
117 return readb((void __iomem *)hwif->io_ports.status_addr);
119 return inb(hwif->io_ports.status_addr);
122 static u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
124 if (hwif->host_flags & IDE_HFLAG_MMIO)
125 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
127 return inb(hwif->dma_base + ATA_DMA_STATUS);
130 static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
132 ide_hwif_t *hwif = drive->hwif;
133 struct ide_io_ports *io_ports = &hwif->io_ports;
134 struct ide_taskfile *tf = &task->tf;
135 void (*tf_outb)(u8 addr, unsigned long port);
136 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
137 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
140 tf_outb = ide_mm_outb;
144 if (task->tf_flags & IDE_TFLAG_FLAGGED)
147 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
148 u16 data = (tf->hob_data << 8) | tf->data;
151 writew(data, (void __iomem *)io_ports->data_addr);
153 outw(data, io_ports->data_addr);
156 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
157 tf_outb(tf->hob_feature, io_ports->feature_addr);
158 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
159 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
160 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
161 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
162 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
163 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
164 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
165 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
167 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
168 tf_outb(tf->feature, io_ports->feature_addr);
169 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
170 tf_outb(tf->nsect, io_ports->nsect_addr);
171 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
172 tf_outb(tf->lbal, io_ports->lbal_addr);
173 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
174 tf_outb(tf->lbam, io_ports->lbam_addr);
175 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
176 tf_outb(tf->lbah, io_ports->lbah_addr);
178 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
179 tf_outb((tf->device & HIHI) | drive->select.all,
180 io_ports->device_addr);
183 static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
185 ide_hwif_t *hwif = drive->hwif;
186 struct ide_io_ports *io_ports = &hwif->io_ports;
187 struct ide_taskfile *tf = &task->tf;
188 void (*tf_outb)(u8 addr, unsigned long port);
189 u8 (*tf_inb)(unsigned long port);
190 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
193 tf_outb = ide_mm_outb;
200 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
204 data = readw((void __iomem *)io_ports->data_addr);
206 data = inw(io_ports->data_addr);
208 tf->data = data & 0xff;
209 tf->hob_data = (data >> 8) & 0xff;
212 /* be sure we're looking at the low order bits */
213 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
215 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
216 tf->nsect = tf_inb(io_ports->nsect_addr);
217 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
218 tf->lbal = tf_inb(io_ports->lbal_addr);
219 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
220 tf->lbam = tf_inb(io_ports->lbam_addr);
221 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
222 tf->lbah = tf_inb(io_ports->lbah_addr);
223 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
224 tf->device = tf_inb(io_ports->device_addr);
226 if (task->tf_flags & IDE_TFLAG_LBA48) {
227 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
229 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
230 tf->hob_feature = tf_inb(io_ports->feature_addr);
231 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
232 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
233 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
234 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
235 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
236 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
237 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
238 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
243 * Some localbus EIDE interfaces require a special access sequence
244 * when using 32-bit I/O instructions to transfer data. We call this
245 * the "vlb_sync" sequence, which consists of three successive reads
246 * of the sector count register location, with interrupts disabled
247 * to ensure that the reads all happen together.
249 static void ata_vlb_sync(unsigned long port)
257 * This is used for most PIO data transfers *from* the IDE interface
259 * These routines will round up any request for an odd number of bytes,
260 * so if an odd len is specified, be sure that there's at least one
261 * extra byte allocated for the buffer.
263 static void ata_input_data(ide_drive_t *drive, struct request *rq,
264 void *buf, unsigned int len)
266 ide_hwif_t *hwif = drive->hwif;
267 struct ide_io_ports *io_ports = &hwif->io_ports;
268 unsigned long data_addr = io_ports->data_addr;
269 u8 io_32bit = drive->io_32bit;
270 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
275 unsigned long uninitialized_var(flags);
277 if ((io_32bit & 2) && !mmio) {
278 local_irq_save(flags);
279 ata_vlb_sync(io_ports->nsect_addr);
283 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
285 insl(data_addr, buf, len / 4);
287 if ((io_32bit & 2) && !mmio)
288 local_irq_restore(flags);
290 if ((len & 3) >= 2) {
292 __ide_mm_insw((void __iomem *)data_addr,
293 (u8 *)buf + (len & ~3), 1);
295 insw(data_addr, (u8 *)buf + (len & ~3), 1);
299 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
301 insw(data_addr, buf, len / 2);
306 * This is used for most PIO data transfers *to* the IDE interface
308 static void ata_output_data(ide_drive_t *drive, struct request *rq,
309 void *buf, unsigned int len)
311 ide_hwif_t *hwif = drive->hwif;
312 struct ide_io_ports *io_ports = &hwif->io_ports;
313 unsigned long data_addr = io_ports->data_addr;
314 u8 io_32bit = drive->io_32bit;
315 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
318 unsigned long uninitialized_var(flags);
320 if ((io_32bit & 2) && !mmio) {
321 local_irq_save(flags);
322 ata_vlb_sync(io_ports->nsect_addr);
326 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
328 outsl(data_addr, buf, len / 4);
330 if ((io_32bit & 2) && !mmio)
331 local_irq_restore(flags);
333 if ((len & 3) >= 2) {
335 __ide_mm_outsw((void __iomem *)data_addr,
336 (u8 *)buf + (len & ~3), 1);
338 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
342 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
344 outsw(data_addr, buf, len / 2);
348 void default_hwif_transport(ide_hwif_t *hwif)
350 hwif->exec_command = ide_exec_command;
351 hwif->read_status = ide_read_status;
352 hwif->read_sff_dma_status = ide_read_sff_dma_status;
354 hwif->tf_load = ide_tf_load;
355 hwif->tf_read = ide_tf_read;
357 hwif->input_data = ata_input_data;
358 hwif->output_data = ata_output_data;
361 void ide_fix_driveid (struct hd_driveid *id)
363 #ifndef __LITTLE_ENDIAN
368 id->config = __le16_to_cpu(id->config);
369 id->cyls = __le16_to_cpu(id->cyls);
370 id->reserved2 = __le16_to_cpu(id->reserved2);
371 id->heads = __le16_to_cpu(id->heads);
372 id->track_bytes = __le16_to_cpu(id->track_bytes);
373 id->sector_bytes = __le16_to_cpu(id->sector_bytes);
374 id->sectors = __le16_to_cpu(id->sectors);
375 id->vendor0 = __le16_to_cpu(id->vendor0);
376 id->vendor1 = __le16_to_cpu(id->vendor1);
377 id->vendor2 = __le16_to_cpu(id->vendor2);
378 stringcast = (u16 *)&id->serial_no[0];
379 for (i = 0; i < (20/2); i++)
380 stringcast[i] = __le16_to_cpu(stringcast[i]);
381 id->buf_type = __le16_to_cpu(id->buf_type);
382 id->buf_size = __le16_to_cpu(id->buf_size);
383 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes);
384 stringcast = (u16 *)&id->fw_rev[0];
385 for (i = 0; i < (8/2); i++)
386 stringcast[i] = __le16_to_cpu(stringcast[i]);
387 stringcast = (u16 *)&id->model[0];
388 for (i = 0; i < (40/2); i++)
389 stringcast[i] = __le16_to_cpu(stringcast[i]);
390 id->dword_io = __le16_to_cpu(id->dword_io);
391 id->reserved50 = __le16_to_cpu(id->reserved50);
392 id->field_valid = __le16_to_cpu(id->field_valid);
393 id->cur_cyls = __le16_to_cpu(id->cur_cyls);
394 id->cur_heads = __le16_to_cpu(id->cur_heads);
395 id->cur_sectors = __le16_to_cpu(id->cur_sectors);
396 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0);
397 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1);
398 id->lba_capacity = __le32_to_cpu(id->lba_capacity);
399 id->dma_1word = __le16_to_cpu(id->dma_1word);
400 id->dma_mword = __le16_to_cpu(id->dma_mword);
401 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
402 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min);
403 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time);
404 id->eide_pio = __le16_to_cpu(id->eide_pio);
405 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
406 for (i = 0; i < 2; ++i)
407 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
408 for (i = 0; i < 4; ++i)
409 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
410 id->queue_depth = __le16_to_cpu(id->queue_depth);
411 for (i = 0; i < 4; ++i)
412 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
413 id->major_rev_num = __le16_to_cpu(id->major_rev_num);
414 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num);
415 id->command_set_1 = __le16_to_cpu(id->command_set_1);
416 id->command_set_2 = __le16_to_cpu(id->command_set_2);
417 id->cfsse = __le16_to_cpu(id->cfsse);
418 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1);
419 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2);
420 id->csf_default = __le16_to_cpu(id->csf_default);
421 id->dma_ultra = __le16_to_cpu(id->dma_ultra);
422 id->trseuc = __le16_to_cpu(id->trseuc);
423 id->trsEuc = __le16_to_cpu(id->trsEuc);
424 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues);
425 id->mprc = __le16_to_cpu(id->mprc);
426 id->hw_config = __le16_to_cpu(id->hw_config);
427 id->acoustic = __le16_to_cpu(id->acoustic);
428 id->msrqs = __le16_to_cpu(id->msrqs);
429 id->sxfert = __le16_to_cpu(id->sxfert);
430 id->sal = __le16_to_cpu(id->sal);
431 id->spg = __le32_to_cpu(id->spg);
432 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
433 for (i = 0; i < 22; i++)
434 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]);
435 id->last_lun = __le16_to_cpu(id->last_lun);
436 id->word127 = __le16_to_cpu(id->word127);
437 id->dlf = __le16_to_cpu(id->dlf);
438 id->csfo = __le16_to_cpu(id->csfo);
439 for (i = 0; i < 26; i++)
440 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
441 id->word156 = __le16_to_cpu(id->word156);
442 for (i = 0; i < 3; i++)
443 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
444 id->cfa_power = __le16_to_cpu(id->cfa_power);
445 for (i = 0; i < 14; i++)
446 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
447 for (i = 0; i < 31; i++)
448 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
449 for (i = 0; i < 48; i++)
450 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
451 id->integrity_word = __le16_to_cpu(id->integrity_word);
453 # error "Please fix <asm/byteorder.h>"
459 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
460 * removing leading/trailing blanks and compressing internal blanks.
461 * It is primarily used to tidy up the model name/number fields as
462 * returned by the WIN_[P]IDENTIFY commands.
465 void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
467 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
470 /* convert from big-endian to host byte order */
471 for (p = end ; p != s;) {
472 unsigned short *pp = (unsigned short *) (p -= 2);
476 /* strip leading blanks */
477 while (s != end && *s == ' ')
479 /* compress internal blanks and strip trailing blanks */
480 while (s != end && *s) {
481 if (*s++ != ' ' || (s != end && *s && *s != ' '))
484 /* wipe out trailing garbage */
489 EXPORT_SYMBOL(ide_fixstring);
492 * Needed for PCI irq sharing
494 int drive_is_ready (ide_drive_t *drive)
496 ide_hwif_t *hwif = HWIF(drive);
499 if (drive->waiting_for_dma)
500 return hwif->dma_ops->dma_test_irq(drive);
503 /* need to guarantee 400ns since last command was issued */
508 * We do a passive status test under shared PCI interrupts on
509 * cards that truly share the ATA side interrupt, but may also share
510 * an interrupt with another pci card/device. We make no assumptions
511 * about possible isa-pnp and pci-pnp issues yet.
513 if (hwif->io_ports.ctl_addr)
514 stat = ide_read_altstatus(drive);
516 /* Note: this may clear a pending IRQ!! */
517 stat = hwif->read_status(hwif);
519 if (stat & BUSY_STAT)
520 /* drive busy: definitely not interrupting */
523 /* drive ready: *might* be interrupting */
527 EXPORT_SYMBOL(drive_is_ready);
530 * This routine busy-waits for the drive status to be not "busy".
531 * It then checks the status for all of the "good" bits and none
532 * of the "bad" bits, and if all is okay it returns 0. All other
533 * cases return error -- caller may then invoke ide_error().
535 * This routine should get fixed to not hog the cpu during extra long waits..
536 * That could be done by busy-waiting for the first jiffy or two, and then
537 * setting a timer to wake up at half second intervals thereafter,
538 * until timeout is achieved, before timing out.
540 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
542 ide_hwif_t *hwif = drive->hwif;
547 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
548 stat = hwif->read_status(hwif);
550 if (stat & BUSY_STAT) {
551 local_irq_set(flags);
553 while ((stat = hwif->read_status(hwif)) & BUSY_STAT) {
554 if (time_after(jiffies, timeout)) {
556 * One last read after the timeout in case
557 * heavy interrupt load made us not make any
558 * progress during the timeout..
560 stat = hwif->read_status(hwif);
561 if (!(stat & BUSY_STAT))
564 local_irq_restore(flags);
569 local_irq_restore(flags);
572 * Allow status to settle, then read it again.
573 * A few rare drives vastly violate the 400ns spec here,
574 * so we'll wait up to 10usec for a "good" status
575 * rather than expensively fail things immediately.
576 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
578 for (i = 0; i < 10; i++) {
580 stat = hwif->read_status(hwif);
582 if (OK_STAT(stat, good, bad)) {
592 * In case of error returns error value after doing "*startstop = ide_error()".
593 * The caller should return the updated value of "startstop" in this case,
594 * "startstop" is unchanged when the function returns 0.
596 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
601 /* bail early if we've exceeded max_failures */
602 if (drive->max_failures && (drive->failures > drive->max_failures)) {
603 *startstop = ide_stopped;
607 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
610 char *s = (err == -EBUSY) ? "status timeout" : "status error";
611 *startstop = ide_error(drive, s, stat);
617 EXPORT_SYMBOL(ide_wait_stat);
620 * ide_in_drive_list - look for drive in black/white list
621 * @id: drive identifier
622 * @drive_table: list to inspect
624 * Look for a drive in the blacklist and the whitelist tables
625 * Returns 1 if the drive is found in the table.
628 int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
630 for ( ; drive_table->id_model; drive_table++)
631 if ((!strcmp(drive_table->id_model, id->model)) &&
632 (!drive_table->id_firmware ||
633 strstr(id->fw_rev, drive_table->id_firmware)))
638 EXPORT_SYMBOL_GPL(ide_in_drive_list);
641 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
642 * We list them here and depend on the device side cable detection for them.
644 * Some optical devices with the buggy firmwares have the same problem.
646 static const struct drive_list_entry ivb_list[] = {
647 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
648 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
649 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
650 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
651 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
652 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
653 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
658 * All hosts that use the 80c ribbon must use!
659 * The name is derived from upper byte of word 93 and the 80c ribbon.
661 u8 eighty_ninty_three (ide_drive_t *drive)
663 ide_hwif_t *hwif = drive->hwif;
664 struct hd_driveid *id = drive->id;
665 int ivb = ide_in_drive_list(id, ivb_list);
667 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
671 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
674 if (ide_dev_is_sata(id) && !ivb)
677 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
682 * - change master/slave IDENTIFY order
683 * - force bit13 (80c cable present) check also for !ivb devices
684 * (unless the slave device is pre-ATA3)
686 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
690 if (drive->udma33_warned == 1)
693 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
694 "limiting max speed to UDMA33\n",
696 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
698 drive->udma33_warned = 1;
703 int ide_driveid_update(ide_drive_t *drive)
705 ide_hwif_t *hwif = drive->hwif;
706 struct hd_driveid *id;
707 unsigned long timeout, flags;
711 * Re-read drive->id for possible DMA mode
712 * change (copied from ide-probe.c)
715 SELECT_MASK(drive, 1);
716 ide_set_irq(drive, 0);
718 hwif->exec_command(hwif, WIN_IDENTIFY);
719 timeout = jiffies + WAIT_WORSTCASE;
721 if (time_after(jiffies, timeout)) {
722 SELECT_MASK(drive, 0);
723 return 0; /* drive timed-out */
726 msleep(50); /* give drive a breather */
727 stat = ide_read_altstatus(drive);
728 } while (stat & BUSY_STAT);
730 msleep(50); /* wait for IRQ and DRQ_STAT */
731 stat = hwif->read_status(hwif);
733 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
734 SELECT_MASK(drive, 0);
735 printk("%s: CHECK for good STATUS\n", drive->name);
738 local_irq_save(flags);
739 SELECT_MASK(drive, 0);
740 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
742 local_irq_restore(flags);
745 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
746 (void)hwif->read_status(hwif); /* clear drive IRQ */
748 local_irq_restore(flags);
751 drive->id->dma_ultra = id->dma_ultra;
752 drive->id->dma_mword = id->dma_mword;
753 drive->id->dma_1word = id->dma_1word;
754 /* anything more ? */
757 if (drive->using_dma && ide_id_dma_bug(drive))
764 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
766 ide_hwif_t *hwif = drive->hwif;
767 struct ide_io_ports *io_ports = &hwif->io_ports;
771 #ifdef CONFIG_BLK_DEV_IDEDMA
772 if (hwif->dma_ops) /* check if host supports DMA */
773 hwif->dma_ops->dma_host_set(drive, 0);
776 /* Skip setting PIO flow-control modes on pre-EIDE drives */
777 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
781 * Don't use ide_wait_cmd here - it will
782 * attempt to set_geometry and recalibrate,
783 * but for some reason these don't work at
784 * this point (lost interrupt).
787 * Select the drive, and issue the SETFEATURES command
789 disable_irq_nosync(hwif->irq);
792 * FIXME: we race against the running IRQ here if
793 * this is called from non IRQ context. If we use
794 * disable_irq() we hang on the error path. Work
800 SELECT_MASK(drive, 0);
802 ide_set_irq(drive, 0);
803 hwif->OUTB(speed, io_ports->nsect_addr);
804 hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
805 hwif->exec_command(hwif, WIN_SETFEATURES);
806 if (drive->quirk_list == 2)
807 ide_set_irq(drive, 1);
809 error = __ide_wait_stat(drive, drive->ready_stat,
810 BUSY_STAT|DRQ_STAT|ERR_STAT,
813 SELECT_MASK(drive, 0);
815 enable_irq(hwif->irq);
818 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
822 drive->id->dma_ultra &= ~0xFF00;
823 drive->id->dma_mword &= ~0x0F00;
824 drive->id->dma_1word &= ~0x0F00;
827 #ifdef CONFIG_BLK_DEV_IDEDMA
828 if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) &&
830 hwif->dma_ops->dma_host_set(drive, 1);
831 else if (hwif->dma_ops) /* check if host supports DMA */
832 ide_dma_off_quietly(drive);
836 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
837 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
838 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
839 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
840 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
841 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
842 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
843 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
844 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
845 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
846 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
847 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
848 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
849 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
852 if (!drive->init_speed)
853 drive->init_speed = speed;
854 drive->current_speed = speed;
859 * This should get invoked any time we exit the driver to
860 * wait for an interrupt response from a drive. handler() points
861 * at the appropriate code to handle the next interrupt, and a
862 * timer is started to prevent us from waiting forever in case
863 * something goes wrong (see the ide_timer_expiry() handler later on).
865 * See also ide_execute_command
867 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
868 unsigned int timeout, ide_expiry_t *expiry)
870 ide_hwgroup_t *hwgroup = HWGROUP(drive);
872 BUG_ON(hwgroup->handler);
873 hwgroup->handler = handler;
874 hwgroup->expiry = expiry;
875 hwgroup->timer.expires = jiffies + timeout;
876 hwgroup->req_gen_timer = hwgroup->req_gen;
877 add_timer(&hwgroup->timer);
880 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
881 unsigned int timeout, ide_expiry_t *expiry)
884 spin_lock_irqsave(&ide_lock, flags);
885 __ide_set_handler(drive, handler, timeout, expiry);
886 spin_unlock_irqrestore(&ide_lock, flags);
889 EXPORT_SYMBOL(ide_set_handler);
892 * ide_execute_command - execute an IDE command
893 * @drive: IDE drive to issue the command against
894 * @command: command byte to write
895 * @handler: handler for next phase
896 * @timeout: timeout for command
897 * @expiry: handler to run on timeout
899 * Helper function to issue an IDE command. This handles the
900 * atomicity requirements, command timing and ensures that the
901 * handler and IRQ setup do not race. All IDE command kick off
902 * should go via this function or do equivalent locking.
905 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
906 unsigned timeout, ide_expiry_t *expiry)
909 ide_hwif_t *hwif = HWIF(drive);
911 spin_lock_irqsave(&ide_lock, flags);
912 __ide_set_handler(drive, handler, timeout, expiry);
913 hwif->exec_command(hwif, cmd);
915 * Drive takes 400nS to respond, we must avoid the IRQ being
916 * serviced before that.
918 * FIXME: we could skip this delay with care on non shared devices
921 spin_unlock_irqrestore(&ide_lock, flags);
923 EXPORT_SYMBOL(ide_execute_command);
925 void ide_execute_pkt_cmd(ide_drive_t *drive)
927 ide_hwif_t *hwif = drive->hwif;
930 spin_lock_irqsave(&ide_lock, flags);
931 hwif->exec_command(hwif, WIN_PACKETCMD);
933 spin_unlock_irqrestore(&ide_lock, flags);
935 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
937 static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
939 struct request *rq = drive->hwif->hwgroup->rq;
941 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
942 ide_end_request(drive, err ? err : 1, 0);
946 static ide_startstop_t do_reset1 (ide_drive_t *, int);
949 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
950 * during an atapi drive reset operation. If the drive has not yet responded,
951 * and we have not yet hit our maximum waiting time, then the timer is restarted
954 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
956 ide_hwif_t *hwif = drive->hwif;
957 ide_hwgroup_t *hwgroup = hwif->hwgroup;
962 stat = hwif->read_status(hwif);
964 if (OK_STAT(stat, 0, BUSY_STAT))
965 printk("%s: ATAPI reset complete\n", drive->name);
967 if (time_before(jiffies, hwgroup->poll_timeout)) {
968 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
969 /* continue polling */
973 hwgroup->polling = 0;
974 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
976 /* do it the old fashioned way */
977 return do_reset1(drive, 1);
980 hwgroup->polling = 0;
981 ide_complete_drive_reset(drive, 0);
986 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
987 * during an ide reset operation. If the drives have not yet responded,
988 * and we have not yet hit our maximum waiting time, then the timer is restarted
991 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
993 ide_hwgroup_t *hwgroup = HWGROUP(drive);
994 ide_hwif_t *hwif = HWIF(drive);
995 const struct ide_port_ops *port_ops = hwif->port_ops;
999 if (port_ops && port_ops->reset_poll) {
1000 err = port_ops->reset_poll(drive);
1002 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
1003 hwif->name, drive->name);
1008 tmp = hwif->read_status(hwif);
1010 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
1011 if (time_before(jiffies, hwgroup->poll_timeout)) {
1012 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1013 /* continue polling */
1016 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1020 printk("%s: reset: ", hwif->name);
1021 tmp = ide_read_error(drive);
1024 printk("success\n");
1025 drive->failures = 0;
1029 switch (tmp & 0x7f) {
1030 case 1: printk("passed");
1032 case 2: printk("formatter device error");
1034 case 3: printk("sector buffer error");
1036 case 4: printk("ECC circuitry error");
1038 case 5: printk("controlling MPU error");
1040 default:printk("error (0x%02x?)", tmp);
1043 printk("; slave: failed");
1049 hwgroup->polling = 0; /* done polling */
1050 ide_complete_drive_reset(drive, err);
1054 static void ide_disk_pre_reset(ide_drive_t *drive)
1056 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1058 drive->special.all = 0;
1059 drive->special.b.set_geometry = legacy;
1060 drive->special.b.recalibrate = legacy;
1061 drive->mult_count = 0;
1062 if (!drive->keep_settings && !drive->using_dma)
1063 drive->mult_req = 0;
1064 if (drive->mult_req != drive->mult_count)
1065 drive->special.b.set_multmode = 1;
1068 static void pre_reset(ide_drive_t *drive)
1070 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1072 if (drive->media == ide_disk)
1073 ide_disk_pre_reset(drive);
1075 drive->post_reset = 1;
1077 if (drive->using_dma) {
1078 if (drive->crc_count)
1079 ide_check_dma_crc(drive);
1084 if (!drive->keep_settings) {
1085 if (!drive->using_dma) {
1087 drive->io_32bit = 0;
1092 if (port_ops && port_ops->pre_reset)
1093 port_ops->pre_reset(drive);
1095 if (drive->current_speed != 0xff)
1096 drive->desired_speed = drive->current_speed;
1097 drive->current_speed = 0xff;
1101 * do_reset1() attempts to recover a confused drive by resetting it.
1102 * Unfortunately, resetting a disk drive actually resets all devices on
1103 * the same interface, so it can really be thought of as resetting the
1104 * interface rather than resetting the drive.
1106 * ATAPI devices have their own reset mechanism which allows them to be
1107 * individually reset without clobbering other devices on the same interface.
1109 * Unfortunately, the IDE interface does not generate an interrupt to let
1110 * us know when the reset operation has finished, so we must poll for this.
1111 * Equally poor, though, is the fact that this may a very long time to complete,
1112 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1113 * we set a timer to poll at 50ms intervals.
1115 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1118 unsigned long flags;
1120 ide_hwgroup_t *hwgroup;
1121 struct ide_io_ports *io_ports;
1122 const struct ide_port_ops *port_ops;
1125 spin_lock_irqsave(&ide_lock, flags);
1127 hwgroup = HWGROUP(drive);
1129 io_ports = &hwif->io_ports;
1131 /* We must not reset with running handlers */
1132 BUG_ON(hwgroup->handler != NULL);
1134 /* For an ATAPI device, first try an ATAPI SRST. */
1135 if (drive->media != ide_disk && !do_not_try_atapi) {
1137 SELECT_DRIVE(drive);
1139 hwif->exec_command(hwif, WIN_SRST);
1141 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1142 hwgroup->polling = 1;
1143 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1144 spin_unlock_irqrestore(&ide_lock, flags);
1149 * First, reset any device state data we were maintaining
1150 * for any of the drives on this interface.
1152 for (unit = 0; unit < MAX_DRIVES; ++unit)
1153 pre_reset(&hwif->drives[unit]);
1155 if (io_ports->ctl_addr == 0) {
1156 spin_unlock_irqrestore(&ide_lock, flags);
1157 ide_complete_drive_reset(drive, -ENXIO);
1162 * Note that we also set nIEN while resetting the device,
1163 * to mask unwanted interrupts from the interface during the reset.
1164 * However, due to the design of PC hardware, this will cause an
1165 * immediate interrupt due to the edge transition it produces.
1166 * This single interrupt gives us a "fast poll" for drives that
1167 * recover from reset very quickly, saving us the first 50ms wait time.
1169 /* set SRST and nIEN */
1170 hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr);
1171 /* more than enough time */
1173 if (drive->quirk_list == 2)
1174 ctl = ATA_DEVCTL_OBS; /* clear SRST and nIEN */
1176 ctl = ATA_DEVCTL_OBS | 2; /* clear SRST, leave nIEN */
1177 hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr);
1178 /* more than enough time */
1180 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1181 hwgroup->polling = 1;
1182 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1185 * Some weird controller like resetting themselves to a strange
1186 * state when the disks are reset this way. At least, the Winbond
1187 * 553 documentation says that
1189 port_ops = hwif->port_ops;
1190 if (port_ops && port_ops->resetproc)
1191 port_ops->resetproc(drive);
1193 spin_unlock_irqrestore(&ide_lock, flags);
1198 * ide_do_reset() is the entry point to the drive/interface reset code.
1201 ide_startstop_t ide_do_reset (ide_drive_t *drive)
1203 return do_reset1(drive, 0);
1206 EXPORT_SYMBOL(ide_do_reset);
1209 * ide_wait_not_busy() waits for the currently selected device on the hwif
1210 * to report a non-busy status, see comments in ide_probe_port().
1212 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1218 * Turn this into a schedule() sleep once I'm sure
1219 * about locking issues (2.5 work ?).
1222 stat = hwif->read_status(hwif);
1223 if ((stat & BUSY_STAT) == 0)
1226 * Assume a value of 0xff means nothing is connected to
1227 * the interface and it doesn't implement the pull-down
1232 touch_softlockup_watchdog();
1233 touch_nmi_watchdog();
1238 EXPORT_SYMBOL_GPL(ide_wait_not_busy);