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->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 static 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);
90 static 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);
98 static u8 ide_read_altstatus(ide_hwif_t *hwif)
100 if (hwif->host_flags & IDE_HFLAG_MMIO)
101 return readb((void __iomem *)hwif->io_ports.ctl_addr);
103 return inb(hwif->io_ports.ctl_addr);
106 static u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
108 if (hwif->host_flags & IDE_HFLAG_MMIO)
109 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
111 return inb(hwif->dma_base + ATA_DMA_STATUS);
114 static void ide_set_irq(ide_hwif_t *hwif, int on)
116 u8 ctl = ATA_DEVCTL_OBS;
118 if (on == 4) { /* hack for SRST */
125 if (hwif->host_flags & IDE_HFLAG_MMIO)
126 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
128 outb(ctl, hwif->io_ports.ctl_addr);
131 static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
133 ide_hwif_t *hwif = drive->hwif;
134 struct ide_io_ports *io_ports = &hwif->io_ports;
135 struct ide_taskfile *tf = &task->tf;
136 void (*tf_outb)(u8 addr, unsigned long port);
137 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
138 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
141 tf_outb = ide_mm_outb;
145 if (task->tf_flags & IDE_TFLAG_FLAGGED)
148 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
149 u16 data = (tf->hob_data << 8) | tf->data;
152 writew(data, (void __iomem *)io_ports->data_addr);
154 outw(data, io_ports->data_addr);
157 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
158 tf_outb(tf->hob_feature, io_ports->feature_addr);
159 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
160 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
161 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
162 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
163 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
164 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
165 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
166 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
168 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
169 tf_outb(tf->feature, io_ports->feature_addr);
170 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
171 tf_outb(tf->nsect, io_ports->nsect_addr);
172 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
173 tf_outb(tf->lbal, io_ports->lbal_addr);
174 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
175 tf_outb(tf->lbam, io_ports->lbam_addr);
176 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
177 tf_outb(tf->lbah, io_ports->lbah_addr);
179 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
180 tf_outb((tf->device & HIHI) | drive->select.all,
181 io_ports->device_addr);
184 static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
186 ide_hwif_t *hwif = drive->hwif;
187 struct ide_io_ports *io_ports = &hwif->io_ports;
188 struct ide_taskfile *tf = &task->tf;
189 void (*tf_outb)(u8 addr, unsigned long port);
190 u8 (*tf_inb)(unsigned long port);
191 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
194 tf_outb = ide_mm_outb;
201 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
205 data = readw((void __iomem *)io_ports->data_addr);
207 data = inw(io_ports->data_addr);
209 tf->data = data & 0xff;
210 tf->hob_data = (data >> 8) & 0xff;
213 /* be sure we're looking at the low order bits */
214 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
216 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
217 tf->feature = tf_inb(io_ports->feature_addr);
218 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
219 tf->nsect = tf_inb(io_ports->nsect_addr);
220 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
221 tf->lbal = tf_inb(io_ports->lbal_addr);
222 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
223 tf->lbam = tf_inb(io_ports->lbam_addr);
224 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
225 tf->lbah = tf_inb(io_ports->lbah_addr);
226 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
227 tf->device = tf_inb(io_ports->device_addr);
229 if (task->tf_flags & IDE_TFLAG_LBA48) {
230 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
232 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
233 tf->hob_feature = tf_inb(io_ports->feature_addr);
234 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
235 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
236 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
237 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
238 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
239 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
240 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
241 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
246 * Some localbus EIDE interfaces require a special access sequence
247 * when using 32-bit I/O instructions to transfer data. We call this
248 * the "vlb_sync" sequence, which consists of three successive reads
249 * of the sector count register location, with interrupts disabled
250 * to ensure that the reads all happen together.
252 static void ata_vlb_sync(unsigned long port)
260 * This is used for most PIO data transfers *from* the IDE interface
262 * These routines will round up any request for an odd number of bytes,
263 * so if an odd len is specified, be sure that there's at least one
264 * extra byte allocated for the buffer.
266 static void ata_input_data(ide_drive_t *drive, struct request *rq,
267 void *buf, unsigned int len)
269 ide_hwif_t *hwif = drive->hwif;
270 struct ide_io_ports *io_ports = &hwif->io_ports;
271 unsigned long data_addr = io_ports->data_addr;
272 u8 io_32bit = drive->io_32bit;
273 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
278 unsigned long uninitialized_var(flags);
280 if ((io_32bit & 2) && !mmio) {
281 local_irq_save(flags);
282 ata_vlb_sync(io_ports->nsect_addr);
286 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
288 insl(data_addr, buf, len / 4);
290 if ((io_32bit & 2) && !mmio)
291 local_irq_restore(flags);
293 if ((len & 3) >= 2) {
295 __ide_mm_insw((void __iomem *)data_addr,
296 (u8 *)buf + (len & ~3), 1);
298 insw(data_addr, (u8 *)buf + (len & ~3), 1);
302 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
304 insw(data_addr, buf, len / 2);
309 * This is used for most PIO data transfers *to* the IDE interface
311 static void ata_output_data(ide_drive_t *drive, struct request *rq,
312 void *buf, unsigned int len)
314 ide_hwif_t *hwif = drive->hwif;
315 struct ide_io_ports *io_ports = &hwif->io_ports;
316 unsigned long data_addr = io_ports->data_addr;
317 u8 io_32bit = drive->io_32bit;
318 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
321 unsigned long uninitialized_var(flags);
323 if ((io_32bit & 2) && !mmio) {
324 local_irq_save(flags);
325 ata_vlb_sync(io_ports->nsect_addr);
329 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
331 outsl(data_addr, buf, len / 4);
333 if ((io_32bit & 2) && !mmio)
334 local_irq_restore(flags);
336 if ((len & 3) >= 2) {
338 __ide_mm_outsw((void __iomem *)data_addr,
339 (u8 *)buf + (len & ~3), 1);
341 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
345 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
347 outsw(data_addr, buf, len / 2);
351 void default_hwif_transport(ide_hwif_t *hwif)
353 hwif->exec_command = ide_exec_command;
354 hwif->read_status = ide_read_status;
355 hwif->read_altstatus = ide_read_altstatus;
356 hwif->read_sff_dma_status = ide_read_sff_dma_status;
358 hwif->set_irq = ide_set_irq;
360 hwif->tf_load = ide_tf_load;
361 hwif->tf_read = ide_tf_read;
363 hwif->input_data = ata_input_data;
364 hwif->output_data = ata_output_data;
367 u8 ide_read_error(ide_drive_t *drive)
371 memset(&task, 0, sizeof(task));
372 task.tf_flags = IDE_TFLAG_IN_FEATURE;
374 drive->hwif->tf_read(drive, &task);
376 return task.tf.error;
378 EXPORT_SYMBOL_GPL(ide_read_error);
380 void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
384 memset(&task, 0, sizeof(task));
385 task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
388 drive->hwif->tf_read(drive, &task);
390 *bcount = (task.tf.lbah << 8) | task.tf.lbam;
391 *ireason = task.tf.nsect & 3;
393 EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
395 void ide_fix_driveid (struct hd_driveid *id)
397 #ifndef __LITTLE_ENDIAN
402 id->config = __le16_to_cpu(id->config);
403 id->cyls = __le16_to_cpu(id->cyls);
404 id->reserved2 = __le16_to_cpu(id->reserved2);
405 id->heads = __le16_to_cpu(id->heads);
406 id->track_bytes = __le16_to_cpu(id->track_bytes);
407 id->sector_bytes = __le16_to_cpu(id->sector_bytes);
408 id->sectors = __le16_to_cpu(id->sectors);
409 id->vendor0 = __le16_to_cpu(id->vendor0);
410 id->vendor1 = __le16_to_cpu(id->vendor1);
411 id->vendor2 = __le16_to_cpu(id->vendor2);
412 stringcast = (u16 *)&id->serial_no[0];
413 for (i = 0; i < (20/2); i++)
414 stringcast[i] = __le16_to_cpu(stringcast[i]);
415 id->buf_type = __le16_to_cpu(id->buf_type);
416 id->buf_size = __le16_to_cpu(id->buf_size);
417 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes);
418 stringcast = (u16 *)&id->fw_rev[0];
419 for (i = 0; i < (8/2); i++)
420 stringcast[i] = __le16_to_cpu(stringcast[i]);
421 stringcast = (u16 *)&id->model[0];
422 for (i = 0; i < (40/2); i++)
423 stringcast[i] = __le16_to_cpu(stringcast[i]);
424 id->dword_io = __le16_to_cpu(id->dword_io);
425 id->reserved50 = __le16_to_cpu(id->reserved50);
426 id->field_valid = __le16_to_cpu(id->field_valid);
427 id->cur_cyls = __le16_to_cpu(id->cur_cyls);
428 id->cur_heads = __le16_to_cpu(id->cur_heads);
429 id->cur_sectors = __le16_to_cpu(id->cur_sectors);
430 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0);
431 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1);
432 id->lba_capacity = __le32_to_cpu(id->lba_capacity);
433 id->dma_1word = __le16_to_cpu(id->dma_1word);
434 id->dma_mword = __le16_to_cpu(id->dma_mword);
435 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
436 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min);
437 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time);
438 id->eide_pio = __le16_to_cpu(id->eide_pio);
439 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
440 for (i = 0; i < 2; ++i)
441 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
442 for (i = 0; i < 4; ++i)
443 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
444 id->queue_depth = __le16_to_cpu(id->queue_depth);
445 for (i = 0; i < 4; ++i)
446 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
447 id->major_rev_num = __le16_to_cpu(id->major_rev_num);
448 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num);
449 id->command_set_1 = __le16_to_cpu(id->command_set_1);
450 id->command_set_2 = __le16_to_cpu(id->command_set_2);
451 id->cfsse = __le16_to_cpu(id->cfsse);
452 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1);
453 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2);
454 id->csf_default = __le16_to_cpu(id->csf_default);
455 id->dma_ultra = __le16_to_cpu(id->dma_ultra);
456 id->trseuc = __le16_to_cpu(id->trseuc);
457 id->trsEuc = __le16_to_cpu(id->trsEuc);
458 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues);
459 id->mprc = __le16_to_cpu(id->mprc);
460 id->hw_config = __le16_to_cpu(id->hw_config);
461 id->acoustic = __le16_to_cpu(id->acoustic);
462 id->msrqs = __le16_to_cpu(id->msrqs);
463 id->sxfert = __le16_to_cpu(id->sxfert);
464 id->sal = __le16_to_cpu(id->sal);
465 id->spg = __le32_to_cpu(id->spg);
466 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
467 for (i = 0; i < 22; i++)
468 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]);
469 id->last_lun = __le16_to_cpu(id->last_lun);
470 id->word127 = __le16_to_cpu(id->word127);
471 id->dlf = __le16_to_cpu(id->dlf);
472 id->csfo = __le16_to_cpu(id->csfo);
473 for (i = 0; i < 26; i++)
474 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
475 id->word156 = __le16_to_cpu(id->word156);
476 for (i = 0; i < 3; i++)
477 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
478 id->cfa_power = __le16_to_cpu(id->cfa_power);
479 for (i = 0; i < 14; i++)
480 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
481 for (i = 0; i < 31; i++)
482 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
483 for (i = 0; i < 48; i++)
484 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
485 id->integrity_word = __le16_to_cpu(id->integrity_word);
487 # error "Please fix <asm/byteorder.h>"
493 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
494 * removing leading/trailing blanks and compressing internal blanks.
495 * It is primarily used to tidy up the model name/number fields as
496 * returned by the WIN_[P]IDENTIFY commands.
499 void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
501 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
504 /* convert from big-endian to host byte order */
505 for (p = end ; p != s;) {
506 unsigned short *pp = (unsigned short *) (p -= 2);
510 /* strip leading blanks */
511 while (s != end && *s == ' ')
513 /* compress internal blanks and strip trailing blanks */
514 while (s != end && *s) {
515 if (*s++ != ' ' || (s != end && *s && *s != ' '))
518 /* wipe out trailing garbage */
523 EXPORT_SYMBOL(ide_fixstring);
526 * Needed for PCI irq sharing
528 int drive_is_ready (ide_drive_t *drive)
530 ide_hwif_t *hwif = HWIF(drive);
533 if (drive->waiting_for_dma)
534 return hwif->dma_ops->dma_test_irq(drive);
537 /* need to guarantee 400ns since last command was issued */
542 * We do a passive status test under shared PCI interrupts on
543 * cards that truly share the ATA side interrupt, but may also share
544 * an interrupt with another pci card/device. We make no assumptions
545 * about possible isa-pnp and pci-pnp issues yet.
547 if (hwif->io_ports.ctl_addr)
548 stat = hwif->read_altstatus(hwif);
550 /* Note: this may clear a pending IRQ!! */
551 stat = hwif->read_status(hwif);
553 if (stat & BUSY_STAT)
554 /* drive busy: definitely not interrupting */
557 /* drive ready: *might* be interrupting */
561 EXPORT_SYMBOL(drive_is_ready);
564 * This routine busy-waits for the drive status to be not "busy".
565 * It then checks the status for all of the "good" bits and none
566 * of the "bad" bits, and if all is okay it returns 0. All other
567 * cases return error -- caller may then invoke ide_error().
569 * This routine should get fixed to not hog the cpu during extra long waits..
570 * That could be done by busy-waiting for the first jiffy or two, and then
571 * setting a timer to wake up at half second intervals thereafter,
572 * until timeout is achieved, before timing out.
574 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
576 ide_hwif_t *hwif = drive->hwif;
581 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
582 stat = hwif->read_status(hwif);
584 if (stat & BUSY_STAT) {
585 local_irq_set(flags);
587 while ((stat = hwif->read_status(hwif)) & BUSY_STAT) {
588 if (time_after(jiffies, timeout)) {
590 * One last read after the timeout in case
591 * heavy interrupt load made us not make any
592 * progress during the timeout..
594 stat = hwif->read_status(hwif);
595 if (!(stat & BUSY_STAT))
598 local_irq_restore(flags);
603 local_irq_restore(flags);
606 * Allow status to settle, then read it again.
607 * A few rare drives vastly violate the 400ns spec here,
608 * so we'll wait up to 10usec for a "good" status
609 * rather than expensively fail things immediately.
610 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
612 for (i = 0; i < 10; i++) {
614 stat = hwif->read_status(hwif);
616 if (OK_STAT(stat, good, bad)) {
626 * In case of error returns error value after doing "*startstop = ide_error()".
627 * The caller should return the updated value of "startstop" in this case,
628 * "startstop" is unchanged when the function returns 0.
630 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
635 /* bail early if we've exceeded max_failures */
636 if (drive->max_failures && (drive->failures > drive->max_failures)) {
637 *startstop = ide_stopped;
641 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
644 char *s = (err == -EBUSY) ? "status timeout" : "status error";
645 *startstop = ide_error(drive, s, stat);
651 EXPORT_SYMBOL(ide_wait_stat);
654 * ide_in_drive_list - look for drive in black/white list
655 * @id: drive identifier
656 * @drive_table: list to inspect
658 * Look for a drive in the blacklist and the whitelist tables
659 * Returns 1 if the drive is found in the table.
662 int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
664 for ( ; drive_table->id_model; drive_table++)
665 if ((!strcmp(drive_table->id_model, id->model)) &&
666 (!drive_table->id_firmware ||
667 strstr(id->fw_rev, drive_table->id_firmware)))
672 EXPORT_SYMBOL_GPL(ide_in_drive_list);
675 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
676 * We list them here and depend on the device side cable detection for them.
678 * Some optical devices with the buggy firmwares have the same problem.
680 static const struct drive_list_entry ivb_list[] = {
681 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
682 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
683 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
684 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
685 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
686 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
687 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
692 * All hosts that use the 80c ribbon must use!
693 * The name is derived from upper byte of word 93 and the 80c ribbon.
695 u8 eighty_ninty_three (ide_drive_t *drive)
697 ide_hwif_t *hwif = drive->hwif;
698 struct hd_driveid *id = drive->id;
699 int ivb = ide_in_drive_list(id, ivb_list);
701 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
705 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
708 if (ide_dev_is_sata(id) && !ivb)
711 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
716 * - change master/slave IDENTIFY order
717 * - force bit13 (80c cable present) check also for !ivb devices
718 * (unless the slave device is pre-ATA3)
720 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
724 if (drive->udma33_warned == 1)
727 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
728 "limiting max speed to UDMA33\n",
730 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
732 drive->udma33_warned = 1;
737 int ide_driveid_update(ide_drive_t *drive)
739 ide_hwif_t *hwif = drive->hwif;
740 struct hd_driveid *id;
741 unsigned long timeout, flags;
745 * Re-read drive->id for possible DMA mode
746 * change (copied from ide-probe.c)
749 SELECT_MASK(drive, 1);
750 hwif->set_irq(hwif, 0);
752 hwif->exec_command(hwif, WIN_IDENTIFY);
753 timeout = jiffies + WAIT_WORSTCASE;
755 if (time_after(jiffies, timeout)) {
756 SELECT_MASK(drive, 0);
757 return 0; /* drive timed-out */
760 msleep(50); /* give drive a breather */
761 stat = hwif->read_altstatus(hwif);
762 } while (stat & BUSY_STAT);
764 msleep(50); /* wait for IRQ and DRQ_STAT */
765 stat = hwif->read_status(hwif);
767 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
768 SELECT_MASK(drive, 0);
769 printk("%s: CHECK for good STATUS\n", drive->name);
772 local_irq_save(flags);
773 SELECT_MASK(drive, 0);
774 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
776 local_irq_restore(flags);
779 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
780 (void)hwif->read_status(hwif); /* clear drive IRQ */
782 local_irq_restore(flags);
785 drive->id->dma_ultra = id->dma_ultra;
786 drive->id->dma_mword = id->dma_mword;
787 drive->id->dma_1word = id->dma_1word;
788 /* anything more ? */
791 if (drive->using_dma && ide_id_dma_bug(drive))
798 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
800 ide_hwif_t *hwif = drive->hwif;
805 #ifdef CONFIG_BLK_DEV_IDEDMA
806 if (hwif->dma_ops) /* check if host supports DMA */
807 hwif->dma_ops->dma_host_set(drive, 0);
810 /* Skip setting PIO flow-control modes on pre-EIDE drives */
811 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
815 * Don't use ide_wait_cmd here - it will
816 * attempt to set_geometry and recalibrate,
817 * but for some reason these don't work at
818 * this point (lost interrupt).
821 * Select the drive, and issue the SETFEATURES command
823 disable_irq_nosync(hwif->irq);
826 * FIXME: we race against the running IRQ here if
827 * this is called from non IRQ context. If we use
828 * disable_irq() we hang on the error path. Work
834 SELECT_MASK(drive, 0);
836 hwif->set_irq(hwif, 0);
838 memset(&task, 0, sizeof(task));
839 task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
840 task.tf.feature = SETFEATURES_XFER;
841 task.tf.nsect = speed;
843 hwif->tf_load(drive, &task);
845 hwif->exec_command(hwif, WIN_SETFEATURES);
847 if (drive->quirk_list == 2)
848 hwif->set_irq(hwif, 1);
850 error = __ide_wait_stat(drive, drive->ready_stat,
851 BUSY_STAT|DRQ_STAT|ERR_STAT,
854 SELECT_MASK(drive, 0);
856 enable_irq(hwif->irq);
859 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
863 drive->id->dma_ultra &= ~0xFF00;
864 drive->id->dma_mword &= ~0x0F00;
865 drive->id->dma_1word &= ~0x0F00;
868 #ifdef CONFIG_BLK_DEV_IDEDMA
869 if (speed >= XFER_SW_DMA_0 && drive->using_dma)
870 hwif->dma_ops->dma_host_set(drive, 1);
871 else if (hwif->dma_ops) /* check if host supports DMA */
872 ide_dma_off_quietly(drive);
876 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
877 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
878 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
879 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
880 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
881 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
882 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
883 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
884 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
885 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
886 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
887 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
888 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
889 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
892 if (!drive->init_speed)
893 drive->init_speed = speed;
894 drive->current_speed = speed;
899 * This should get invoked any time we exit the driver to
900 * wait for an interrupt response from a drive. handler() points
901 * at the appropriate code to handle the next interrupt, and a
902 * timer is started to prevent us from waiting forever in case
903 * something goes wrong (see the ide_timer_expiry() handler later on).
905 * See also ide_execute_command
907 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
908 unsigned int timeout, ide_expiry_t *expiry)
910 ide_hwgroup_t *hwgroup = HWGROUP(drive);
912 BUG_ON(hwgroup->handler);
913 hwgroup->handler = handler;
914 hwgroup->expiry = expiry;
915 hwgroup->timer.expires = jiffies + timeout;
916 hwgroup->req_gen_timer = hwgroup->req_gen;
917 add_timer(&hwgroup->timer);
920 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
921 unsigned int timeout, ide_expiry_t *expiry)
924 spin_lock_irqsave(&ide_lock, flags);
925 __ide_set_handler(drive, handler, timeout, expiry);
926 spin_unlock_irqrestore(&ide_lock, flags);
929 EXPORT_SYMBOL(ide_set_handler);
932 * ide_execute_command - execute an IDE command
933 * @drive: IDE drive to issue the command against
934 * @command: command byte to write
935 * @handler: handler for next phase
936 * @timeout: timeout for command
937 * @expiry: handler to run on timeout
939 * Helper function to issue an IDE command. This handles the
940 * atomicity requirements, command timing and ensures that the
941 * handler and IRQ setup do not race. All IDE command kick off
942 * should go via this function or do equivalent locking.
945 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
946 unsigned timeout, ide_expiry_t *expiry)
949 ide_hwif_t *hwif = HWIF(drive);
951 spin_lock_irqsave(&ide_lock, flags);
952 __ide_set_handler(drive, handler, timeout, expiry);
953 hwif->exec_command(hwif, cmd);
955 * Drive takes 400nS to respond, we must avoid the IRQ being
956 * serviced before that.
958 * FIXME: we could skip this delay with care on non shared devices
961 spin_unlock_irqrestore(&ide_lock, flags);
963 EXPORT_SYMBOL(ide_execute_command);
965 void ide_execute_pkt_cmd(ide_drive_t *drive)
967 ide_hwif_t *hwif = drive->hwif;
970 spin_lock_irqsave(&ide_lock, flags);
971 hwif->exec_command(hwif, WIN_PACKETCMD);
973 spin_unlock_irqrestore(&ide_lock, flags);
975 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
977 static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
979 struct request *rq = drive->hwif->hwgroup->rq;
981 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
982 ide_end_request(drive, err ? err : 1, 0);
986 static ide_startstop_t do_reset1 (ide_drive_t *, int);
989 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
990 * during an atapi drive reset operation. If the drive has not yet responded,
991 * and we have not yet hit our maximum waiting time, then the timer is restarted
994 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
996 ide_hwif_t *hwif = drive->hwif;
997 ide_hwgroup_t *hwgroup = hwif->hwgroup;
1000 SELECT_DRIVE(drive);
1002 stat = hwif->read_status(hwif);
1004 if (OK_STAT(stat, 0, BUSY_STAT))
1005 printk("%s: ATAPI reset complete\n", drive->name);
1007 if (time_before(jiffies, hwgroup->poll_timeout)) {
1008 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1009 /* continue polling */
1012 /* end of polling */
1013 hwgroup->polling = 0;
1014 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
1016 /* do it the old fashioned way */
1017 return do_reset1(drive, 1);
1020 hwgroup->polling = 0;
1021 ide_complete_drive_reset(drive, 0);
1026 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
1027 * during an ide reset operation. If the drives have not yet responded,
1028 * and we have not yet hit our maximum waiting time, then the timer is restarted
1031 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
1033 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1034 ide_hwif_t *hwif = HWIF(drive);
1035 const struct ide_port_ops *port_ops = hwif->port_ops;
1039 if (port_ops && port_ops->reset_poll) {
1040 err = port_ops->reset_poll(drive);
1042 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
1043 hwif->name, drive->name);
1048 tmp = hwif->read_status(hwif);
1050 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
1051 if (time_before(jiffies, hwgroup->poll_timeout)) {
1052 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1053 /* continue polling */
1056 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1060 printk("%s: reset: ", hwif->name);
1061 tmp = ide_read_error(drive);
1064 printk("success\n");
1065 drive->failures = 0;
1069 switch (tmp & 0x7f) {
1070 case 1: printk("passed");
1072 case 2: printk("formatter device error");
1074 case 3: printk("sector buffer error");
1076 case 4: printk("ECC circuitry error");
1078 case 5: printk("controlling MPU error");
1080 default:printk("error (0x%02x?)", tmp);
1083 printk("; slave: failed");
1089 hwgroup->polling = 0; /* done polling */
1090 ide_complete_drive_reset(drive, err);
1094 static void ide_disk_pre_reset(ide_drive_t *drive)
1096 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1098 drive->special.all = 0;
1099 drive->special.b.set_geometry = legacy;
1100 drive->special.b.recalibrate = legacy;
1101 drive->mult_count = 0;
1102 if (!drive->keep_settings && !drive->using_dma)
1103 drive->mult_req = 0;
1104 if (drive->mult_req != drive->mult_count)
1105 drive->special.b.set_multmode = 1;
1108 static void pre_reset(ide_drive_t *drive)
1110 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1112 if (drive->media == ide_disk)
1113 ide_disk_pre_reset(drive);
1115 drive->post_reset = 1;
1117 if (drive->using_dma) {
1118 if (drive->crc_count)
1119 ide_check_dma_crc(drive);
1124 if (!drive->keep_settings) {
1125 if (!drive->using_dma) {
1127 drive->io_32bit = 0;
1132 if (port_ops && port_ops->pre_reset)
1133 port_ops->pre_reset(drive);
1135 if (drive->current_speed != 0xff)
1136 drive->desired_speed = drive->current_speed;
1137 drive->current_speed = 0xff;
1141 * do_reset1() attempts to recover a confused drive by resetting it.
1142 * Unfortunately, resetting a disk drive actually resets all devices on
1143 * the same interface, so it can really be thought of as resetting the
1144 * interface rather than resetting the drive.
1146 * ATAPI devices have their own reset mechanism which allows them to be
1147 * individually reset without clobbering other devices on the same interface.
1149 * Unfortunately, the IDE interface does not generate an interrupt to let
1150 * us know when the reset operation has finished, so we must poll for this.
1151 * Equally poor, though, is the fact that this may a very long time to complete,
1152 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1153 * we set a timer to poll at 50ms intervals.
1155 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1158 unsigned long flags;
1160 ide_hwgroup_t *hwgroup;
1161 struct ide_io_ports *io_ports;
1162 const struct ide_port_ops *port_ops;
1164 spin_lock_irqsave(&ide_lock, flags);
1166 hwgroup = HWGROUP(drive);
1168 io_ports = &hwif->io_ports;
1170 /* We must not reset with running handlers */
1171 BUG_ON(hwgroup->handler != NULL);
1173 /* For an ATAPI device, first try an ATAPI SRST. */
1174 if (drive->media != ide_disk && !do_not_try_atapi) {
1176 SELECT_DRIVE(drive);
1178 hwif->exec_command(hwif, WIN_SRST);
1180 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1181 hwgroup->polling = 1;
1182 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1183 spin_unlock_irqrestore(&ide_lock, flags);
1188 * First, reset any device state data we were maintaining
1189 * for any of the drives on this interface.
1191 for (unit = 0; unit < MAX_DRIVES; ++unit)
1192 pre_reset(&hwif->drives[unit]);
1194 if (io_ports->ctl_addr == 0) {
1195 spin_unlock_irqrestore(&ide_lock, flags);
1196 ide_complete_drive_reset(drive, -ENXIO);
1201 * Note that we also set nIEN while resetting the device,
1202 * to mask unwanted interrupts from the interface during the reset.
1203 * However, due to the design of PC hardware, this will cause an
1204 * immediate interrupt due to the edge transition it produces.
1205 * This single interrupt gives us a "fast poll" for drives that
1206 * recover from reset very quickly, saving us the first 50ms wait time.
1208 * TODO: add ->softreset method and stop abusing ->set_irq
1210 /* set SRST and nIEN */
1211 hwif->set_irq(hwif, 4);
1212 /* more than enough time */
1214 /* clear SRST, leave nIEN (unless device is on the quirk list) */
1215 hwif->set_irq(hwif, drive->quirk_list == 2);
1216 /* more than enough time */
1218 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1219 hwgroup->polling = 1;
1220 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1223 * Some weird controller like resetting themselves to a strange
1224 * state when the disks are reset this way. At least, the Winbond
1225 * 553 documentation says that
1227 port_ops = hwif->port_ops;
1228 if (port_ops && port_ops->resetproc)
1229 port_ops->resetproc(drive);
1231 spin_unlock_irqrestore(&ide_lock, flags);
1236 * ide_do_reset() is the entry point to the drive/interface reset code.
1239 ide_startstop_t ide_do_reset (ide_drive_t *drive)
1241 return do_reset1(drive, 0);
1244 EXPORT_SYMBOL(ide_do_reset);
1247 * ide_wait_not_busy() waits for the currently selected device on the hwif
1248 * to report a non-busy status, see comments in ide_probe_port().
1250 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1256 * Turn this into a schedule() sleep once I'm sure
1257 * about locking issues (2.5 work ?).
1260 stat = hwif->read_status(hwif);
1261 if ((stat & BUSY_STAT) == 0)
1264 * Assume a value of 0xff means nothing is connected to
1265 * the interface and it doesn't implement the pull-down
1270 touch_softlockup_watchdog();
1271 touch_nmi_watchdog();
1276 EXPORT_SYMBOL_GPL(ide_wait_not_busy);