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 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_tf_load(ide_drive_t *drive, ide_task_t *task)
116 ide_hwif_t *hwif = drive->hwif;
117 struct ide_io_ports *io_ports = &hwif->io_ports;
118 struct ide_taskfile *tf = &task->tf;
119 void (*tf_outb)(u8 addr, unsigned long port);
120 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
121 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
124 tf_outb = ide_mm_outb;
128 if (task->tf_flags & IDE_TFLAG_FLAGGED)
131 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
132 u16 data = (tf->hob_data << 8) | tf->data;
135 writew(data, (void __iomem *)io_ports->data_addr);
137 outw(data, io_ports->data_addr);
140 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
141 tf_outb(tf->hob_feature, io_ports->feature_addr);
142 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
143 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
144 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
145 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
146 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
147 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
148 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
149 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
151 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
152 tf_outb(tf->feature, io_ports->feature_addr);
153 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
154 tf_outb(tf->nsect, io_ports->nsect_addr);
155 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
156 tf_outb(tf->lbal, io_ports->lbal_addr);
157 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
158 tf_outb(tf->lbam, io_ports->lbam_addr);
159 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
160 tf_outb(tf->lbah, io_ports->lbah_addr);
162 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
163 tf_outb((tf->device & HIHI) | drive->select.all,
164 io_ports->device_addr);
167 static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
169 ide_hwif_t *hwif = drive->hwif;
170 struct ide_io_ports *io_ports = &hwif->io_ports;
171 struct ide_taskfile *tf = &task->tf;
172 void (*tf_outb)(u8 addr, unsigned long port);
173 u8 (*tf_inb)(unsigned long port);
174 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
177 tf_outb = ide_mm_outb;
184 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
188 data = readw((void __iomem *)io_ports->data_addr);
190 data = inw(io_ports->data_addr);
192 tf->data = data & 0xff;
193 tf->hob_data = (data >> 8) & 0xff;
196 /* be sure we're looking at the low order bits */
197 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
199 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
200 tf->nsect = tf_inb(io_ports->nsect_addr);
201 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
202 tf->lbal = tf_inb(io_ports->lbal_addr);
203 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
204 tf->lbam = tf_inb(io_ports->lbam_addr);
205 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
206 tf->lbah = tf_inb(io_ports->lbah_addr);
207 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
208 tf->device = tf_inb(io_ports->device_addr);
210 if (task->tf_flags & IDE_TFLAG_LBA48) {
211 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
213 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
214 tf->hob_feature = tf_inb(io_ports->feature_addr);
215 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
216 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
217 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
218 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
219 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
220 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
221 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
222 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
227 * Some localbus EIDE interfaces require a special access sequence
228 * when using 32-bit I/O instructions to transfer data. We call this
229 * the "vlb_sync" sequence, which consists of three successive reads
230 * of the sector count register location, with interrupts disabled
231 * to ensure that the reads all happen together.
233 static void ata_vlb_sync(unsigned long port)
241 * This is used for most PIO data transfers *from* the IDE interface
243 * These routines will round up any request for an odd number of bytes,
244 * so if an odd len is specified, be sure that there's at least one
245 * extra byte allocated for the buffer.
247 static void ata_input_data(ide_drive_t *drive, struct request *rq,
248 void *buf, unsigned int len)
250 ide_hwif_t *hwif = drive->hwif;
251 struct ide_io_ports *io_ports = &hwif->io_ports;
252 unsigned long data_addr = io_ports->data_addr;
253 u8 io_32bit = drive->io_32bit;
254 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
259 unsigned long uninitialized_var(flags);
261 if ((io_32bit & 2) && !mmio) {
262 local_irq_save(flags);
263 ata_vlb_sync(io_ports->nsect_addr);
267 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
269 insl(data_addr, buf, len / 4);
271 if ((io_32bit & 2) && !mmio)
272 local_irq_restore(flags);
274 if ((len & 3) >= 2) {
276 __ide_mm_insw((void __iomem *)data_addr,
277 (u8 *)buf + (len & ~3), 1);
279 insw(data_addr, (u8 *)buf + (len & ~3), 1);
283 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
285 insw(data_addr, buf, len / 2);
290 * This is used for most PIO data transfers *to* the IDE interface
292 static void ata_output_data(ide_drive_t *drive, struct request *rq,
293 void *buf, unsigned int len)
295 ide_hwif_t *hwif = drive->hwif;
296 struct ide_io_ports *io_ports = &hwif->io_ports;
297 unsigned long data_addr = io_ports->data_addr;
298 u8 io_32bit = drive->io_32bit;
299 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
302 unsigned long uninitialized_var(flags);
304 if ((io_32bit & 2) && !mmio) {
305 local_irq_save(flags);
306 ata_vlb_sync(io_ports->nsect_addr);
310 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
312 outsl(data_addr, buf, len / 4);
314 if ((io_32bit & 2) && !mmio)
315 local_irq_restore(flags);
317 if ((len & 3) >= 2) {
319 __ide_mm_outsw((void __iomem *)data_addr,
320 (u8 *)buf + (len & ~3), 1);
322 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
326 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
328 outsw(data_addr, buf, len / 2);
332 void default_hwif_transport(ide_hwif_t *hwif)
334 hwif->read_sff_dma_status = ide_read_sff_dma_status;
336 hwif->tf_load = ide_tf_load;
337 hwif->tf_read = ide_tf_read;
339 hwif->input_data = ata_input_data;
340 hwif->output_data = ata_output_data;
343 void ide_fix_driveid (struct hd_driveid *id)
345 #ifndef __LITTLE_ENDIAN
350 id->config = __le16_to_cpu(id->config);
351 id->cyls = __le16_to_cpu(id->cyls);
352 id->reserved2 = __le16_to_cpu(id->reserved2);
353 id->heads = __le16_to_cpu(id->heads);
354 id->track_bytes = __le16_to_cpu(id->track_bytes);
355 id->sector_bytes = __le16_to_cpu(id->sector_bytes);
356 id->sectors = __le16_to_cpu(id->sectors);
357 id->vendor0 = __le16_to_cpu(id->vendor0);
358 id->vendor1 = __le16_to_cpu(id->vendor1);
359 id->vendor2 = __le16_to_cpu(id->vendor2);
360 stringcast = (u16 *)&id->serial_no[0];
361 for (i = 0; i < (20/2); i++)
362 stringcast[i] = __le16_to_cpu(stringcast[i]);
363 id->buf_type = __le16_to_cpu(id->buf_type);
364 id->buf_size = __le16_to_cpu(id->buf_size);
365 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes);
366 stringcast = (u16 *)&id->fw_rev[0];
367 for (i = 0; i < (8/2); i++)
368 stringcast[i] = __le16_to_cpu(stringcast[i]);
369 stringcast = (u16 *)&id->model[0];
370 for (i = 0; i < (40/2); i++)
371 stringcast[i] = __le16_to_cpu(stringcast[i]);
372 id->dword_io = __le16_to_cpu(id->dword_io);
373 id->reserved50 = __le16_to_cpu(id->reserved50);
374 id->field_valid = __le16_to_cpu(id->field_valid);
375 id->cur_cyls = __le16_to_cpu(id->cur_cyls);
376 id->cur_heads = __le16_to_cpu(id->cur_heads);
377 id->cur_sectors = __le16_to_cpu(id->cur_sectors);
378 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0);
379 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1);
380 id->lba_capacity = __le32_to_cpu(id->lba_capacity);
381 id->dma_1word = __le16_to_cpu(id->dma_1word);
382 id->dma_mword = __le16_to_cpu(id->dma_mword);
383 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
384 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min);
385 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time);
386 id->eide_pio = __le16_to_cpu(id->eide_pio);
387 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
388 for (i = 0; i < 2; ++i)
389 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
390 for (i = 0; i < 4; ++i)
391 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
392 id->queue_depth = __le16_to_cpu(id->queue_depth);
393 for (i = 0; i < 4; ++i)
394 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
395 id->major_rev_num = __le16_to_cpu(id->major_rev_num);
396 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num);
397 id->command_set_1 = __le16_to_cpu(id->command_set_1);
398 id->command_set_2 = __le16_to_cpu(id->command_set_2);
399 id->cfsse = __le16_to_cpu(id->cfsse);
400 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1);
401 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2);
402 id->csf_default = __le16_to_cpu(id->csf_default);
403 id->dma_ultra = __le16_to_cpu(id->dma_ultra);
404 id->trseuc = __le16_to_cpu(id->trseuc);
405 id->trsEuc = __le16_to_cpu(id->trsEuc);
406 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues);
407 id->mprc = __le16_to_cpu(id->mprc);
408 id->hw_config = __le16_to_cpu(id->hw_config);
409 id->acoustic = __le16_to_cpu(id->acoustic);
410 id->msrqs = __le16_to_cpu(id->msrqs);
411 id->sxfert = __le16_to_cpu(id->sxfert);
412 id->sal = __le16_to_cpu(id->sal);
413 id->spg = __le32_to_cpu(id->spg);
414 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
415 for (i = 0; i < 22; i++)
416 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]);
417 id->last_lun = __le16_to_cpu(id->last_lun);
418 id->word127 = __le16_to_cpu(id->word127);
419 id->dlf = __le16_to_cpu(id->dlf);
420 id->csfo = __le16_to_cpu(id->csfo);
421 for (i = 0; i < 26; i++)
422 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
423 id->word156 = __le16_to_cpu(id->word156);
424 for (i = 0; i < 3; i++)
425 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
426 id->cfa_power = __le16_to_cpu(id->cfa_power);
427 for (i = 0; i < 14; i++)
428 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
429 for (i = 0; i < 31; i++)
430 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
431 for (i = 0; i < 48; i++)
432 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
433 id->integrity_word = __le16_to_cpu(id->integrity_word);
435 # error "Please fix <asm/byteorder.h>"
441 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
442 * removing leading/trailing blanks and compressing internal blanks.
443 * It is primarily used to tidy up the model name/number fields as
444 * returned by the WIN_[P]IDENTIFY commands.
447 void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
449 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
452 /* convert from big-endian to host byte order */
453 for (p = end ; p != s;) {
454 unsigned short *pp = (unsigned short *) (p -= 2);
458 /* strip leading blanks */
459 while (s != end && *s == ' ')
461 /* compress internal blanks and strip trailing blanks */
462 while (s != end && *s) {
463 if (*s++ != ' ' || (s != end && *s && *s != ' '))
466 /* wipe out trailing garbage */
471 EXPORT_SYMBOL(ide_fixstring);
474 * Needed for PCI irq sharing
476 int drive_is_ready (ide_drive_t *drive)
478 ide_hwif_t *hwif = HWIF(drive);
481 if (drive->waiting_for_dma)
482 return hwif->dma_ops->dma_test_irq(drive);
485 /* need to guarantee 400ns since last command was issued */
490 * We do a passive status test under shared PCI interrupts on
491 * cards that truly share the ATA side interrupt, but may also share
492 * an interrupt with another pci card/device. We make no assumptions
493 * about possible isa-pnp and pci-pnp issues yet.
495 if (hwif->io_ports.ctl_addr)
496 stat = ide_read_altstatus(drive);
498 /* Note: this may clear a pending IRQ!! */
499 stat = ide_read_status(drive);
501 if (stat & BUSY_STAT)
502 /* drive busy: definitely not interrupting */
505 /* drive ready: *might* be interrupting */
509 EXPORT_SYMBOL(drive_is_ready);
512 * This routine busy-waits for the drive status to be not "busy".
513 * It then checks the status for all of the "good" bits and none
514 * of the "bad" bits, and if all is okay it returns 0. All other
515 * cases return error -- caller may then invoke ide_error().
517 * This routine should get fixed to not hog the cpu during extra long waits..
518 * That could be done by busy-waiting for the first jiffy or two, and then
519 * setting a timer to wake up at half second intervals thereafter,
520 * until timeout is achieved, before timing out.
522 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
528 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
529 stat = ide_read_status(drive);
531 if (stat & BUSY_STAT) {
532 local_irq_set(flags);
534 while ((stat = ide_read_status(drive)) & BUSY_STAT) {
535 if (time_after(jiffies, timeout)) {
537 * One last read after the timeout in case
538 * heavy interrupt load made us not make any
539 * progress during the timeout..
541 stat = ide_read_status(drive);
542 if (!(stat & BUSY_STAT))
545 local_irq_restore(flags);
550 local_irq_restore(flags);
553 * Allow status to settle, then read it again.
554 * A few rare drives vastly violate the 400ns spec here,
555 * so we'll wait up to 10usec for a "good" status
556 * rather than expensively fail things immediately.
557 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
559 for (i = 0; i < 10; i++) {
561 stat = ide_read_status(drive);
563 if (OK_STAT(stat, good, bad)) {
573 * In case of error returns error value after doing "*startstop = ide_error()".
574 * The caller should return the updated value of "startstop" in this case,
575 * "startstop" is unchanged when the function returns 0.
577 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
582 /* bail early if we've exceeded max_failures */
583 if (drive->max_failures && (drive->failures > drive->max_failures)) {
584 *startstop = ide_stopped;
588 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
591 char *s = (err == -EBUSY) ? "status timeout" : "status error";
592 *startstop = ide_error(drive, s, stat);
598 EXPORT_SYMBOL(ide_wait_stat);
601 * ide_in_drive_list - look for drive in black/white list
602 * @id: drive identifier
603 * @drive_table: list to inspect
605 * Look for a drive in the blacklist and the whitelist tables
606 * Returns 1 if the drive is found in the table.
609 int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
611 for ( ; drive_table->id_model; drive_table++)
612 if ((!strcmp(drive_table->id_model, id->model)) &&
613 (!drive_table->id_firmware ||
614 strstr(id->fw_rev, drive_table->id_firmware)))
619 EXPORT_SYMBOL_GPL(ide_in_drive_list);
622 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
623 * We list them here and depend on the device side cable detection for them.
625 * Some optical devices with the buggy firmwares have the same problem.
627 static const struct drive_list_entry ivb_list[] = {
628 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
629 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
630 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
631 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
632 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
633 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
634 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
639 * All hosts that use the 80c ribbon must use!
640 * The name is derived from upper byte of word 93 and the 80c ribbon.
642 u8 eighty_ninty_three (ide_drive_t *drive)
644 ide_hwif_t *hwif = drive->hwif;
645 struct hd_driveid *id = drive->id;
646 int ivb = ide_in_drive_list(id, ivb_list);
648 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
652 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
655 if (ide_dev_is_sata(id) && !ivb)
658 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
663 * - change master/slave IDENTIFY order
664 * - force bit13 (80c cable present) check also for !ivb devices
665 * (unless the slave device is pre-ATA3)
667 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
671 if (drive->udma33_warned == 1)
674 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
675 "limiting max speed to UDMA33\n",
677 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
679 drive->udma33_warned = 1;
684 int ide_driveid_update(ide_drive_t *drive)
686 ide_hwif_t *hwif = drive->hwif;
687 struct hd_driveid *id;
688 unsigned long timeout, flags;
692 * Re-read drive->id for possible DMA mode
693 * change (copied from ide-probe.c)
696 SELECT_MASK(drive, 1);
697 ide_set_irq(drive, 0);
699 hwif->OUTBSYNC(hwif, WIN_IDENTIFY, hwif->io_ports.command_addr);
700 timeout = jiffies + WAIT_WORSTCASE;
702 if (time_after(jiffies, timeout)) {
703 SELECT_MASK(drive, 0);
704 return 0; /* drive timed-out */
707 msleep(50); /* give drive a breather */
708 stat = ide_read_altstatus(drive);
709 } while (stat & BUSY_STAT);
711 msleep(50); /* wait for IRQ and DRQ_STAT */
712 stat = ide_read_status(drive);
714 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
715 SELECT_MASK(drive, 0);
716 printk("%s: CHECK for good STATUS\n", drive->name);
719 local_irq_save(flags);
720 SELECT_MASK(drive, 0);
721 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
723 local_irq_restore(flags);
726 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
727 (void)ide_read_status(drive); /* clear drive IRQ */
729 local_irq_restore(flags);
732 drive->id->dma_ultra = id->dma_ultra;
733 drive->id->dma_mword = id->dma_mword;
734 drive->id->dma_1word = id->dma_1word;
735 /* anything more ? */
738 if (drive->using_dma && ide_id_dma_bug(drive))
745 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
747 ide_hwif_t *hwif = drive->hwif;
748 struct ide_io_ports *io_ports = &hwif->io_ports;
752 #ifdef CONFIG_BLK_DEV_IDEDMA
753 if (hwif->dma_ops) /* check if host supports DMA */
754 hwif->dma_ops->dma_host_set(drive, 0);
757 /* Skip setting PIO flow-control modes on pre-EIDE drives */
758 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
762 * Don't use ide_wait_cmd here - it will
763 * attempt to set_geometry and recalibrate,
764 * but for some reason these don't work at
765 * this point (lost interrupt).
768 * Select the drive, and issue the SETFEATURES command
770 disable_irq_nosync(hwif->irq);
773 * FIXME: we race against the running IRQ here if
774 * this is called from non IRQ context. If we use
775 * disable_irq() we hang on the error path. Work
781 SELECT_MASK(drive, 0);
783 ide_set_irq(drive, 0);
784 hwif->OUTB(speed, io_ports->nsect_addr);
785 hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
786 hwif->OUTBSYNC(hwif, WIN_SETFEATURES, io_ports->command_addr);
787 if (drive->quirk_list == 2)
788 ide_set_irq(drive, 1);
790 error = __ide_wait_stat(drive, drive->ready_stat,
791 BUSY_STAT|DRQ_STAT|ERR_STAT,
794 SELECT_MASK(drive, 0);
796 enable_irq(hwif->irq);
799 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
803 drive->id->dma_ultra &= ~0xFF00;
804 drive->id->dma_mword &= ~0x0F00;
805 drive->id->dma_1word &= ~0x0F00;
808 #ifdef CONFIG_BLK_DEV_IDEDMA
809 if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) &&
811 hwif->dma_ops->dma_host_set(drive, 1);
812 else if (hwif->dma_ops) /* check if host supports DMA */
813 ide_dma_off_quietly(drive);
817 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
818 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
819 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
820 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
821 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
822 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
823 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
824 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
825 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
826 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
827 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
828 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
829 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
830 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
833 if (!drive->init_speed)
834 drive->init_speed = speed;
835 drive->current_speed = speed;
840 * This should get invoked any time we exit the driver to
841 * wait for an interrupt response from a drive. handler() points
842 * at the appropriate code to handle the next interrupt, and a
843 * timer is started to prevent us from waiting forever in case
844 * something goes wrong (see the ide_timer_expiry() handler later on).
846 * See also ide_execute_command
848 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
849 unsigned int timeout, ide_expiry_t *expiry)
851 ide_hwgroup_t *hwgroup = HWGROUP(drive);
853 BUG_ON(hwgroup->handler);
854 hwgroup->handler = handler;
855 hwgroup->expiry = expiry;
856 hwgroup->timer.expires = jiffies + timeout;
857 hwgroup->req_gen_timer = hwgroup->req_gen;
858 add_timer(&hwgroup->timer);
861 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
862 unsigned int timeout, ide_expiry_t *expiry)
865 spin_lock_irqsave(&ide_lock, flags);
866 __ide_set_handler(drive, handler, timeout, expiry);
867 spin_unlock_irqrestore(&ide_lock, flags);
870 EXPORT_SYMBOL(ide_set_handler);
873 * ide_execute_command - execute an IDE command
874 * @drive: IDE drive to issue the command against
875 * @command: command byte to write
876 * @handler: handler for next phase
877 * @timeout: timeout for command
878 * @expiry: handler to run on timeout
880 * Helper function to issue an IDE command. This handles the
881 * atomicity requirements, command timing and ensures that the
882 * handler and IRQ setup do not race. All IDE command kick off
883 * should go via this function or do equivalent locking.
886 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
887 unsigned timeout, ide_expiry_t *expiry)
890 ide_hwif_t *hwif = HWIF(drive);
892 spin_lock_irqsave(&ide_lock, flags);
893 __ide_set_handler(drive, handler, timeout, expiry);
894 hwif->OUTBSYNC(hwif, cmd, hwif->io_ports.command_addr);
896 * Drive takes 400nS to respond, we must avoid the IRQ being
897 * serviced before that.
899 * FIXME: we could skip this delay with care on non shared devices
902 spin_unlock_irqrestore(&ide_lock, flags);
904 EXPORT_SYMBOL(ide_execute_command);
906 void ide_execute_pkt_cmd(ide_drive_t *drive)
908 ide_hwif_t *hwif = drive->hwif;
911 spin_lock_irqsave(&ide_lock, flags);
912 hwif->OUTBSYNC(hwif, WIN_PACKETCMD, hwif->io_ports.command_addr);
914 spin_unlock_irqrestore(&ide_lock, flags);
916 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
918 static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
920 struct request *rq = drive->hwif->hwgroup->rq;
922 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
923 ide_end_request(drive, err ? err : 1, 0);
927 static ide_startstop_t do_reset1 (ide_drive_t *, int);
930 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
931 * during an atapi drive reset operation. If the drive has not yet responded,
932 * and we have not yet hit our maximum waiting time, then the timer is restarted
935 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
937 ide_hwgroup_t *hwgroup = HWGROUP(drive);
942 stat = ide_read_status(drive);
944 if (OK_STAT(stat, 0, BUSY_STAT))
945 printk("%s: ATAPI reset complete\n", drive->name);
947 if (time_before(jiffies, hwgroup->poll_timeout)) {
948 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
949 /* continue polling */
953 hwgroup->polling = 0;
954 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
956 /* do it the old fashioned way */
957 return do_reset1(drive, 1);
960 hwgroup->polling = 0;
961 ide_complete_drive_reset(drive, 0);
966 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
967 * during an ide reset operation. If the drives have not yet responded,
968 * and we have not yet hit our maximum waiting time, then the timer is restarted
971 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
973 ide_hwgroup_t *hwgroup = HWGROUP(drive);
974 ide_hwif_t *hwif = HWIF(drive);
975 const struct ide_port_ops *port_ops = hwif->port_ops;
979 if (port_ops && port_ops->reset_poll) {
980 err = port_ops->reset_poll(drive);
982 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
983 hwif->name, drive->name);
988 tmp = ide_read_status(drive);
990 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
991 if (time_before(jiffies, hwgroup->poll_timeout)) {
992 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
993 /* continue polling */
996 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1000 printk("%s: reset: ", hwif->name);
1001 tmp = ide_read_error(drive);
1004 printk("success\n");
1005 drive->failures = 0;
1009 switch (tmp & 0x7f) {
1010 case 1: printk("passed");
1012 case 2: printk("formatter device error");
1014 case 3: printk("sector buffer error");
1016 case 4: printk("ECC circuitry error");
1018 case 5: printk("controlling MPU error");
1020 default:printk("error (0x%02x?)", tmp);
1023 printk("; slave: failed");
1029 hwgroup->polling = 0; /* done polling */
1030 ide_complete_drive_reset(drive, err);
1034 static void ide_disk_pre_reset(ide_drive_t *drive)
1036 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1038 drive->special.all = 0;
1039 drive->special.b.set_geometry = legacy;
1040 drive->special.b.recalibrate = legacy;
1041 drive->mult_count = 0;
1042 if (!drive->keep_settings && !drive->using_dma)
1043 drive->mult_req = 0;
1044 if (drive->mult_req != drive->mult_count)
1045 drive->special.b.set_multmode = 1;
1048 static void pre_reset(ide_drive_t *drive)
1050 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1052 if (drive->media == ide_disk)
1053 ide_disk_pre_reset(drive);
1055 drive->post_reset = 1;
1057 if (drive->using_dma) {
1058 if (drive->crc_count)
1059 ide_check_dma_crc(drive);
1064 if (!drive->keep_settings) {
1065 if (!drive->using_dma) {
1067 drive->io_32bit = 0;
1072 if (port_ops && port_ops->pre_reset)
1073 port_ops->pre_reset(drive);
1075 if (drive->current_speed != 0xff)
1076 drive->desired_speed = drive->current_speed;
1077 drive->current_speed = 0xff;
1081 * do_reset1() attempts to recover a confused drive by resetting it.
1082 * Unfortunately, resetting a disk drive actually resets all devices on
1083 * the same interface, so it can really be thought of as resetting the
1084 * interface rather than resetting the drive.
1086 * ATAPI devices have their own reset mechanism which allows them to be
1087 * individually reset without clobbering other devices on the same interface.
1089 * Unfortunately, the IDE interface does not generate an interrupt to let
1090 * us know when the reset operation has finished, so we must poll for this.
1091 * Equally poor, though, is the fact that this may a very long time to complete,
1092 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1093 * we set a timer to poll at 50ms intervals.
1095 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1098 unsigned long flags;
1100 ide_hwgroup_t *hwgroup;
1101 struct ide_io_ports *io_ports;
1102 const struct ide_port_ops *port_ops;
1105 spin_lock_irqsave(&ide_lock, flags);
1107 hwgroup = HWGROUP(drive);
1109 io_ports = &hwif->io_ports;
1111 /* We must not reset with running handlers */
1112 BUG_ON(hwgroup->handler != NULL);
1114 /* For an ATAPI device, first try an ATAPI SRST. */
1115 if (drive->media != ide_disk && !do_not_try_atapi) {
1117 SELECT_DRIVE(drive);
1119 hwif->OUTBSYNC(hwif, WIN_SRST, io_ports->command_addr);
1121 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1122 hwgroup->polling = 1;
1123 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1124 spin_unlock_irqrestore(&ide_lock, flags);
1129 * First, reset any device state data we were maintaining
1130 * for any of the drives on this interface.
1132 for (unit = 0; unit < MAX_DRIVES; ++unit)
1133 pre_reset(&hwif->drives[unit]);
1135 if (io_ports->ctl_addr == 0) {
1136 spin_unlock_irqrestore(&ide_lock, flags);
1137 ide_complete_drive_reset(drive, -ENXIO);
1142 * Note that we also set nIEN while resetting the device,
1143 * to mask unwanted interrupts from the interface during the reset.
1144 * However, due to the design of PC hardware, this will cause an
1145 * immediate interrupt due to the edge transition it produces.
1146 * This single interrupt gives us a "fast poll" for drives that
1147 * recover from reset very quickly, saving us the first 50ms wait time.
1149 /* set SRST and nIEN */
1150 hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr);
1151 /* more than enough time */
1153 if (drive->quirk_list == 2)
1154 ctl = ATA_DEVCTL_OBS; /* clear SRST and nIEN */
1156 ctl = ATA_DEVCTL_OBS | 2; /* clear SRST, leave nIEN */
1157 hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr);
1158 /* more than enough time */
1160 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1161 hwgroup->polling = 1;
1162 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1165 * Some weird controller like resetting themselves to a strange
1166 * state when the disks are reset this way. At least, the Winbond
1167 * 553 documentation says that
1169 port_ops = hwif->port_ops;
1170 if (port_ops && port_ops->resetproc)
1171 port_ops->resetproc(drive);
1173 spin_unlock_irqrestore(&ide_lock, flags);
1178 * ide_do_reset() is the entry point to the drive/interface reset code.
1181 ide_startstop_t ide_do_reset (ide_drive_t *drive)
1183 return do_reset1(drive, 0);
1186 EXPORT_SYMBOL(ide_do_reset);
1189 * ide_wait_not_busy() waits for the currently selected device on the hwif
1190 * to report a non-busy status, see comments in ide_probe_port().
1192 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1198 * Turn this into a schedule() sleep once I'm sure
1199 * about locking issues (2.5 work ?).
1202 stat = hwif->INB(hwif->io_ports.status_addr);
1203 if ((stat & BUSY_STAT) == 0)
1206 * Assume a value of 0xff means nothing is connected to
1207 * the interface and it doesn't implement the pull-down
1212 touch_softlockup_watchdog();
1213 touch_nmi_watchdog();
1218 EXPORT_SYMBOL_GPL(ide_wait_not_busy);