2 * linux/drivers/ide/ide-iops.c Version 0.37 Mar 05, 2003
4 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2003 Red Hat <alan@redhat.com>
9 #include <linux/module.h>
10 #include <linux/types.h>
11 #include <linux/string.h>
12 #include <linux/kernel.h>
13 #include <linux/timer.h>
15 #include <linux/interrupt.h>
16 #include <linux/major.h>
17 #include <linux/errno.h>
18 #include <linux/genhd.h>
19 #include <linux/blkpg.h>
20 #include <linux/slab.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/hdreg.h>
24 #include <linux/ide.h>
25 #include <linux/bitops.h>
26 #include <linux/nmi.h>
28 #include <asm/byteorder.h>
30 #include <asm/uaccess.h>
34 * Conventional PIO operations for ATA devices
37 static u8
ide_inb (unsigned long port
)
39 return (u8
) inb(port
);
42 static u16
ide_inw (unsigned long port
)
44 return (u16
) inw(port
);
47 static void ide_insw (unsigned long port
, void *addr
, u32 count
)
49 insw(port
, addr
, count
);
52 static void ide_insl (unsigned long port
, void *addr
, u32 count
)
54 insl(port
, addr
, count
);
57 static void ide_outb (u8 val
, unsigned long port
)
62 static void ide_outbsync (ide_drive_t
*drive
, u8 addr
, unsigned long port
)
67 static void ide_outw (u16 val
, unsigned long port
)
72 static void ide_outsw (unsigned long port
, void *addr
, u32 count
)
74 outsw(port
, addr
, count
);
77 static void ide_outsl (unsigned long port
, void *addr
, u32 count
)
79 outsl(port
, addr
, count
);
82 void default_hwif_iops (ide_hwif_t
*hwif
)
84 hwif
->OUTB
= ide_outb
;
85 hwif
->OUTBSYNC
= ide_outbsync
;
86 hwif
->OUTW
= ide_outw
;
87 hwif
->OUTSW
= ide_outsw
;
88 hwif
->OUTSL
= ide_outsl
;
91 hwif
->INSW
= ide_insw
;
92 hwif
->INSL
= ide_insl
;
96 * MMIO operations, typically used for SATA controllers
99 static u8
ide_mm_inb (unsigned long port
)
101 return (u8
) readb((void __iomem
*) port
);
104 static u16
ide_mm_inw (unsigned long port
)
106 return (u16
) readw((void __iomem
*) port
);
109 static void ide_mm_insw (unsigned long port
, void *addr
, u32 count
)
111 __ide_mm_insw((void __iomem
*) port
, addr
, count
);
114 static void ide_mm_insl (unsigned long port
, void *addr
, u32 count
)
116 __ide_mm_insl((void __iomem
*) port
, addr
, count
);
119 static void ide_mm_outb (u8 value
, unsigned long port
)
121 writeb(value
, (void __iomem
*) port
);
124 static void ide_mm_outbsync (ide_drive_t
*drive
, u8 value
, unsigned long port
)
126 writeb(value
, (void __iomem
*) port
);
129 static void ide_mm_outw (u16 value
, unsigned long port
)
131 writew(value
, (void __iomem
*) port
);
134 static void ide_mm_outsw (unsigned long port
, void *addr
, u32 count
)
136 __ide_mm_outsw((void __iomem
*) port
, addr
, count
);
139 static void ide_mm_outsl (unsigned long port
, void *addr
, u32 count
)
141 __ide_mm_outsl((void __iomem
*) port
, addr
, count
);
144 void default_hwif_mmiops (ide_hwif_t
*hwif
)
146 hwif
->OUTB
= ide_mm_outb
;
147 /* Most systems will need to override OUTBSYNC, alas however
148 this one is controller specific! */
149 hwif
->OUTBSYNC
= ide_mm_outbsync
;
150 hwif
->OUTW
= ide_mm_outw
;
151 hwif
->OUTSW
= ide_mm_outsw
;
152 hwif
->OUTSL
= ide_mm_outsl
;
153 hwif
->INB
= ide_mm_inb
;
154 hwif
->INW
= ide_mm_inw
;
155 hwif
->INSW
= ide_mm_insw
;
156 hwif
->INSL
= ide_mm_insl
;
159 EXPORT_SYMBOL(default_hwif_mmiops
);
161 void SELECT_DRIVE (ide_drive_t
*drive
)
163 if (HWIF(drive
)->selectproc
)
164 HWIF(drive
)->selectproc(drive
);
165 HWIF(drive
)->OUTB(drive
->select
.all
, IDE_SELECT_REG
);
168 EXPORT_SYMBOL(SELECT_DRIVE
);
170 void SELECT_MASK (ide_drive_t
*drive
, int mask
)
172 if (HWIF(drive
)->maskproc
)
173 HWIF(drive
)->maskproc(drive
, mask
);
177 * Some localbus EIDE interfaces require a special access sequence
178 * when using 32-bit I/O instructions to transfer data. We call this
179 * the "vlb_sync" sequence, which consists of three successive reads
180 * of the sector count register location, with interrupts disabled
181 * to ensure that the reads all happen together.
183 static void ata_vlb_sync(ide_drive_t
*drive
, unsigned long port
)
185 (void) HWIF(drive
)->INB(port
);
186 (void) HWIF(drive
)->INB(port
);
187 (void) HWIF(drive
)->INB(port
);
191 * This is used for most PIO data transfers *from* the IDE interface
193 static void ata_input_data(ide_drive_t
*drive
, void *buffer
, u32 wcount
)
195 ide_hwif_t
*hwif
= HWIF(drive
);
196 u8 io_32bit
= drive
->io_32bit
;
201 local_irq_save(flags
);
202 ata_vlb_sync(drive
, IDE_NSECTOR_REG
);
203 hwif
->INSL(IDE_DATA_REG
, buffer
, wcount
);
204 local_irq_restore(flags
);
206 hwif
->INSL(IDE_DATA_REG
, buffer
, wcount
);
208 hwif
->INSW(IDE_DATA_REG
, buffer
, wcount
<<1);
213 * This is used for most PIO data transfers *to* the IDE interface
215 static void ata_output_data(ide_drive_t
*drive
, void *buffer
, u32 wcount
)
217 ide_hwif_t
*hwif
= HWIF(drive
);
218 u8 io_32bit
= drive
->io_32bit
;
223 local_irq_save(flags
);
224 ata_vlb_sync(drive
, IDE_NSECTOR_REG
);
225 hwif
->OUTSL(IDE_DATA_REG
, buffer
, wcount
);
226 local_irq_restore(flags
);
228 hwif
->OUTSL(IDE_DATA_REG
, buffer
, wcount
);
230 hwif
->OUTSW(IDE_DATA_REG
, buffer
, wcount
<<1);
235 * The following routines are mainly used by the ATAPI drivers.
237 * These routines will round up any request for an odd number of bytes,
238 * so if an odd bytecount is specified, be sure that there's at least one
239 * extra byte allocated for the buffer.
242 static void atapi_input_bytes(ide_drive_t
*drive
, void *buffer
, u32 bytecount
)
244 ide_hwif_t
*hwif
= HWIF(drive
);
247 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
248 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
249 /* Atari has a byte-swapped IDE interface */
250 insw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
253 #endif /* CONFIG_ATARI || CONFIG_Q40 */
254 hwif
->ata_input_data(drive
, buffer
, bytecount
/ 4);
255 if ((bytecount
& 0x03) >= 2)
256 hwif
->INSW(IDE_DATA_REG
, ((u8
*)buffer
)+(bytecount
& ~0x03), 1);
259 static void atapi_output_bytes(ide_drive_t
*drive
, void *buffer
, u32 bytecount
)
261 ide_hwif_t
*hwif
= HWIF(drive
);
264 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
265 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
266 /* Atari has a byte-swapped IDE interface */
267 outsw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
270 #endif /* CONFIG_ATARI || CONFIG_Q40 */
271 hwif
->ata_output_data(drive
, buffer
, bytecount
/ 4);
272 if ((bytecount
& 0x03) >= 2)
273 hwif
->OUTSW(IDE_DATA_REG
, ((u8
*)buffer
)+(bytecount
& ~0x03), 1);
276 void default_hwif_transport(ide_hwif_t
*hwif
)
278 hwif
->ata_input_data
= ata_input_data
;
279 hwif
->ata_output_data
= ata_output_data
;
280 hwif
->atapi_input_bytes
= atapi_input_bytes
;
281 hwif
->atapi_output_bytes
= atapi_output_bytes
;
284 void ide_fix_driveid (struct hd_driveid
*id
)
286 #ifndef __LITTLE_ENDIAN
291 id
->config
= __le16_to_cpu(id
->config
);
292 id
->cyls
= __le16_to_cpu(id
->cyls
);
293 id
->reserved2
= __le16_to_cpu(id
->reserved2
);
294 id
->heads
= __le16_to_cpu(id
->heads
);
295 id
->track_bytes
= __le16_to_cpu(id
->track_bytes
);
296 id
->sector_bytes
= __le16_to_cpu(id
->sector_bytes
);
297 id
->sectors
= __le16_to_cpu(id
->sectors
);
298 id
->vendor0
= __le16_to_cpu(id
->vendor0
);
299 id
->vendor1
= __le16_to_cpu(id
->vendor1
);
300 id
->vendor2
= __le16_to_cpu(id
->vendor2
);
301 stringcast
= (u16
*)&id
->serial_no
[0];
302 for (i
= 0; i
< (20/2); i
++)
303 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
304 id
->buf_type
= __le16_to_cpu(id
->buf_type
);
305 id
->buf_size
= __le16_to_cpu(id
->buf_size
);
306 id
->ecc_bytes
= __le16_to_cpu(id
->ecc_bytes
);
307 stringcast
= (u16
*)&id
->fw_rev
[0];
308 for (i
= 0; i
< (8/2); i
++)
309 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
310 stringcast
= (u16
*)&id
->model
[0];
311 for (i
= 0; i
< (40/2); i
++)
312 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
313 id
->dword_io
= __le16_to_cpu(id
->dword_io
);
314 id
->reserved50
= __le16_to_cpu(id
->reserved50
);
315 id
->field_valid
= __le16_to_cpu(id
->field_valid
);
316 id
->cur_cyls
= __le16_to_cpu(id
->cur_cyls
);
317 id
->cur_heads
= __le16_to_cpu(id
->cur_heads
);
318 id
->cur_sectors
= __le16_to_cpu(id
->cur_sectors
);
319 id
->cur_capacity0
= __le16_to_cpu(id
->cur_capacity0
);
320 id
->cur_capacity1
= __le16_to_cpu(id
->cur_capacity1
);
321 id
->lba_capacity
= __le32_to_cpu(id
->lba_capacity
);
322 id
->dma_1word
= __le16_to_cpu(id
->dma_1word
);
323 id
->dma_mword
= __le16_to_cpu(id
->dma_mword
);
324 id
->eide_pio_modes
= __le16_to_cpu(id
->eide_pio_modes
);
325 id
->eide_dma_min
= __le16_to_cpu(id
->eide_dma_min
);
326 id
->eide_dma_time
= __le16_to_cpu(id
->eide_dma_time
);
327 id
->eide_pio
= __le16_to_cpu(id
->eide_pio
);
328 id
->eide_pio_iordy
= __le16_to_cpu(id
->eide_pio_iordy
);
329 for (i
= 0; i
< 2; ++i
)
330 id
->words69_70
[i
] = __le16_to_cpu(id
->words69_70
[i
]);
331 for (i
= 0; i
< 4; ++i
)
332 id
->words71_74
[i
] = __le16_to_cpu(id
->words71_74
[i
]);
333 id
->queue_depth
= __le16_to_cpu(id
->queue_depth
);
334 for (i
= 0; i
< 4; ++i
)
335 id
->words76_79
[i
] = __le16_to_cpu(id
->words76_79
[i
]);
336 id
->major_rev_num
= __le16_to_cpu(id
->major_rev_num
);
337 id
->minor_rev_num
= __le16_to_cpu(id
->minor_rev_num
);
338 id
->command_set_1
= __le16_to_cpu(id
->command_set_1
);
339 id
->command_set_2
= __le16_to_cpu(id
->command_set_2
);
340 id
->cfsse
= __le16_to_cpu(id
->cfsse
);
341 id
->cfs_enable_1
= __le16_to_cpu(id
->cfs_enable_1
);
342 id
->cfs_enable_2
= __le16_to_cpu(id
->cfs_enable_2
);
343 id
->csf_default
= __le16_to_cpu(id
->csf_default
);
344 id
->dma_ultra
= __le16_to_cpu(id
->dma_ultra
);
345 id
->trseuc
= __le16_to_cpu(id
->trseuc
);
346 id
->trsEuc
= __le16_to_cpu(id
->trsEuc
);
347 id
->CurAPMvalues
= __le16_to_cpu(id
->CurAPMvalues
);
348 id
->mprc
= __le16_to_cpu(id
->mprc
);
349 id
->hw_config
= __le16_to_cpu(id
->hw_config
);
350 id
->acoustic
= __le16_to_cpu(id
->acoustic
);
351 id
->msrqs
= __le16_to_cpu(id
->msrqs
);
352 id
->sxfert
= __le16_to_cpu(id
->sxfert
);
353 id
->sal
= __le16_to_cpu(id
->sal
);
354 id
->spg
= __le32_to_cpu(id
->spg
);
355 id
->lba_capacity_2
= __le64_to_cpu(id
->lba_capacity_2
);
356 for (i
= 0; i
< 22; i
++)
357 id
->words104_125
[i
] = __le16_to_cpu(id
->words104_125
[i
]);
358 id
->last_lun
= __le16_to_cpu(id
->last_lun
);
359 id
->word127
= __le16_to_cpu(id
->word127
);
360 id
->dlf
= __le16_to_cpu(id
->dlf
);
361 id
->csfo
= __le16_to_cpu(id
->csfo
);
362 for (i
= 0; i
< 26; i
++)
363 id
->words130_155
[i
] = __le16_to_cpu(id
->words130_155
[i
]);
364 id
->word156
= __le16_to_cpu(id
->word156
);
365 for (i
= 0; i
< 3; i
++)
366 id
->words157_159
[i
] = __le16_to_cpu(id
->words157_159
[i
]);
367 id
->cfa_power
= __le16_to_cpu(id
->cfa_power
);
368 for (i
= 0; i
< 14; i
++)
369 id
->words161_175
[i
] = __le16_to_cpu(id
->words161_175
[i
]);
370 for (i
= 0; i
< 31; i
++)
371 id
->words176_205
[i
] = __le16_to_cpu(id
->words176_205
[i
]);
372 for (i
= 0; i
< 48; i
++)
373 id
->words206_254
[i
] = __le16_to_cpu(id
->words206_254
[i
]);
374 id
->integrity_word
= __le16_to_cpu(id
->integrity_word
);
376 # error "Please fix <asm/byteorder.h>"
382 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
383 * removing leading/trailing blanks and compressing internal blanks.
384 * It is primarily used to tidy up the model name/number fields as
385 * returned by the WIN_[P]IDENTIFY commands.
388 void ide_fixstring (u8
*s
, const int bytecount
, const int byteswap
)
390 u8
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
393 /* convert from big-endian to host byte order */
394 for (p
= end
; p
!= s
;) {
395 unsigned short *pp
= (unsigned short *) (p
-= 2);
399 /* strip leading blanks */
400 while (s
!= end
&& *s
== ' ')
402 /* compress internal blanks and strip trailing blanks */
403 while (s
!= end
&& *s
) {
404 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
407 /* wipe out trailing garbage */
412 EXPORT_SYMBOL(ide_fixstring
);
415 * Needed for PCI irq sharing
417 int drive_is_ready (ide_drive_t
*drive
)
419 ide_hwif_t
*hwif
= HWIF(drive
);
422 if (drive
->waiting_for_dma
)
423 return hwif
->ide_dma_test_irq(drive
);
426 /* need to guarantee 400ns since last command was issued */
431 * We do a passive status test under shared PCI interrupts on
432 * cards that truly share the ATA side interrupt, but may also share
433 * an interrupt with another pci card/device. We make no assumptions
434 * about possible isa-pnp and pci-pnp issues yet.
437 stat
= hwif
->INB(IDE_ALTSTATUS_REG
);
439 /* Note: this may clear a pending IRQ!! */
440 stat
= hwif
->INB(IDE_STATUS_REG
);
442 if (stat
& BUSY_STAT
)
443 /* drive busy: definitely not interrupting */
446 /* drive ready: *might* be interrupting */
450 EXPORT_SYMBOL(drive_is_ready
);
453 * This routine busy-waits for the drive status to be not "busy".
454 * It then checks the status for all of the "good" bits and none
455 * of the "bad" bits, and if all is okay it returns 0. All other
456 * cases return error -- caller may then invoke ide_error().
458 * This routine should get fixed to not hog the cpu during extra long waits..
459 * That could be done by busy-waiting for the first jiffy or two, and then
460 * setting a timer to wake up at half second intervals thereafter,
461 * until timeout is achieved, before timing out.
463 static int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
, u8
*rstat
)
465 ide_hwif_t
*hwif
= drive
->hwif
;
470 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
471 if ((stat
= hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) {
472 local_irq_set(flags
);
474 while ((stat
= hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) {
475 if (time_after(jiffies
, timeout
)) {
477 * One last read after the timeout in case
478 * heavy interrupt load made us not make any
479 * progress during the timeout..
481 stat
= hwif
->INB(IDE_STATUS_REG
);
482 if (!(stat
& BUSY_STAT
))
485 local_irq_restore(flags
);
490 local_irq_restore(flags
);
493 * Allow status to settle, then read it again.
494 * A few rare drives vastly violate the 400ns spec here,
495 * so we'll wait up to 10usec for a "good" status
496 * rather than expensively fail things immediately.
497 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
499 for (i
= 0; i
< 10; i
++) {
501 if (OK_STAT((stat
= hwif
->INB(IDE_STATUS_REG
)), good
, bad
)) {
511 * In case of error returns error value after doing "*startstop = ide_error()".
512 * The caller should return the updated value of "startstop" in this case,
513 * "startstop" is unchanged when the function returns 0.
515 int ide_wait_stat(ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
)
520 /* bail early if we've exceeded max_failures */
521 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
522 *startstop
= ide_stopped
;
526 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
529 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
530 *startstop
= ide_error(drive
, s
, stat
);
536 EXPORT_SYMBOL(ide_wait_stat
);
539 * ide_in_drive_list - look for drive in black/white list
540 * @id: drive identifier
541 * @drive_table: list to inspect
543 * Look for a drive in the blacklist and the whitelist tables
544 * Returns 1 if the drive is found in the table.
547 int ide_in_drive_list(struct hd_driveid
*id
, const struct drive_list_entry
*drive_table
)
549 for ( ; drive_table
->id_model
; drive_table
++)
550 if ((!strcmp(drive_table
->id_model
, id
->model
)) &&
551 (!drive_table
->id_firmware
||
552 strstr(id
->fw_rev
, drive_table
->id_firmware
)))
557 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
560 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
561 * We list them here and depend on the device side cable detection for them.
563 * Some optical devices with the buggy firmwares have the same problem.
565 static const struct drive_list_entry ivb_list
[] = {
566 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
567 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
568 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
569 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
570 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
575 * All hosts that use the 80c ribbon must use!
576 * The name is derived from upper byte of word 93 and the 80c ribbon.
578 u8
eighty_ninty_three (ide_drive_t
*drive
)
580 ide_hwif_t
*hwif
= drive
->hwif
;
581 struct hd_driveid
*id
= drive
->id
;
582 int ivb
= ide_in_drive_list(id
, ivb_list
);
584 if (hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
588 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
591 if (ide_dev_is_sata(id
) && !ivb
)
594 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
599 * - force bit13 (80c cable present) check also for !ivb devices
600 * (unless the slave device is pre-ATA3)
602 if ((id
->hw_config
& 0x4000) || (ivb
&& (id
->hw_config
& 0x2000)))
606 if (drive
->udma33_warned
== 1)
609 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
610 "limiting max speed to UDMA33\n",
612 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
614 drive
->udma33_warned
= 1;
619 int ide_ata66_check (ide_drive_t
*drive
, ide_task_t
*args
)
621 if (args
->tf
.command
== WIN_SETFEATURES
&&
622 args
->tf
.nsect
> XFER_UDMA_2
&&
623 args
->tf
.feature
== SETFEATURES_XFER
) {
624 if (eighty_ninty_three(drive
) == 0) {
625 printk(KERN_WARNING
"%s: UDMA speeds >UDMA33 cannot "
626 "be set\n", drive
->name
);
635 * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER.
636 * 1 : Safe to update drive->id DMA registers.
637 * 0 : OOPs not allowed.
639 int set_transfer (ide_drive_t
*drive
, ide_task_t
*args
)
641 if (args
->tf
.command
== WIN_SETFEATURES
&&
642 args
->tf
.nsect
>= XFER_SW_DMA_0
&&
643 args
->tf
.feature
== SETFEATURES_XFER
&&
644 (drive
->id
->dma_ultra
||
645 drive
->id
->dma_mword
||
646 drive
->id
->dma_1word
))
652 #ifdef CONFIG_BLK_DEV_IDEDMA
653 static u8
ide_auto_reduce_xfer (ide_drive_t
*drive
)
655 if (!drive
->crc_count
)
656 return drive
->current_speed
;
657 drive
->crc_count
= 0;
659 switch(drive
->current_speed
) {
660 case XFER_UDMA_7
: return XFER_UDMA_6
;
661 case XFER_UDMA_6
: return XFER_UDMA_5
;
662 case XFER_UDMA_5
: return XFER_UDMA_4
;
663 case XFER_UDMA_4
: return XFER_UDMA_3
;
664 case XFER_UDMA_3
: return XFER_UDMA_2
;
665 case XFER_UDMA_2
: return XFER_UDMA_1
;
666 case XFER_UDMA_1
: return XFER_UDMA_0
;
668 * OOPS we do not goto non Ultra DMA modes
669 * without iCRC's available we force
670 * the system to PIO and make the user
671 * invoke the ATA-1 ATA-2 DMA modes.
674 default: return XFER_PIO_4
;
677 #endif /* CONFIG_BLK_DEV_IDEDMA */
679 int ide_driveid_update(ide_drive_t
*drive
)
681 ide_hwif_t
*hwif
= drive
->hwif
;
682 struct hd_driveid
*id
;
683 unsigned long timeout
, flags
;
686 * Re-read drive->id for possible DMA mode
687 * change (copied from ide-probe.c)
690 SELECT_MASK(drive
, 1);
691 ide_set_irq(drive
, 1);
693 hwif
->OUTB(WIN_IDENTIFY
, IDE_COMMAND_REG
);
694 timeout
= jiffies
+ WAIT_WORSTCASE
;
696 if (time_after(jiffies
, timeout
)) {
697 SELECT_MASK(drive
, 0);
698 return 0; /* drive timed-out */
700 msleep(50); /* give drive a breather */
701 } while (hwif
->INB(IDE_ALTSTATUS_REG
) & BUSY_STAT
);
702 msleep(50); /* wait for IRQ and DRQ_STAT */
703 if (!OK_STAT(hwif
->INB(IDE_STATUS_REG
),DRQ_STAT
,BAD_R_STAT
)) {
704 SELECT_MASK(drive
, 0);
705 printk("%s: CHECK for good STATUS\n", drive
->name
);
708 local_irq_save(flags
);
709 SELECT_MASK(drive
, 0);
710 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
712 local_irq_restore(flags
);
715 ata_input_data(drive
, id
, SECTOR_WORDS
);
716 (void) hwif
->INB(IDE_STATUS_REG
); /* clear drive IRQ */
718 local_irq_restore(flags
);
721 drive
->id
->dma_ultra
= id
->dma_ultra
;
722 drive
->id
->dma_mword
= id
->dma_mword
;
723 drive
->id
->dma_1word
= id
->dma_1word
;
724 /* anything more ? */
727 if (drive
->using_dma
&& ide_id_dma_bug(drive
))
734 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
736 ide_hwif_t
*hwif
= drive
->hwif
;
740 // while (HWGROUP(drive)->busy)
743 #ifdef CONFIG_BLK_DEV_IDEDMA
744 if (hwif
->dma_host_set
) /* check if host supports DMA */
745 hwif
->dma_host_set(drive
, 0);
748 /* Skip setting PIO flow-control modes on pre-EIDE drives */
749 if ((speed
& 0xf8) == XFER_PIO_0
&& !(drive
->id
->capability
& 0x08))
753 * Don't use ide_wait_cmd here - it will
754 * attempt to set_geometry and recalibrate,
755 * but for some reason these don't work at
756 * this point (lost interrupt).
759 * Select the drive, and issue the SETFEATURES command
761 disable_irq_nosync(hwif
->irq
);
764 * FIXME: we race against the running IRQ here if
765 * this is called from non IRQ context. If we use
766 * disable_irq() we hang on the error path. Work
772 SELECT_MASK(drive
, 0);
774 ide_set_irq(drive
, 0);
775 hwif
->OUTB(speed
, IDE_NSECTOR_REG
);
776 hwif
->OUTB(SETFEATURES_XFER
, IDE_FEATURE_REG
);
777 hwif
->OUTBSYNC(drive
, WIN_SETFEATURES
, IDE_COMMAND_REG
);
778 if (drive
->quirk_list
== 2)
779 ide_set_irq(drive
, 1);
781 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
782 BUSY_STAT
|DRQ_STAT
|ERR_STAT
,
785 SELECT_MASK(drive
, 0);
787 enable_irq(hwif
->irq
);
790 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
794 drive
->id
->dma_ultra
&= ~0xFF00;
795 drive
->id
->dma_mword
&= ~0x0F00;
796 drive
->id
->dma_1word
&= ~0x0F00;
799 #ifdef CONFIG_BLK_DEV_IDEDMA
800 if ((speed
>= XFER_SW_DMA_0
|| (hwif
->host_flags
& IDE_HFLAG_VDMA
)) &&
802 hwif
->dma_host_set(drive
, 1);
803 else if (hwif
->dma_host_set
) /* check if host supports DMA */
804 ide_dma_off_quietly(drive
);
808 case XFER_UDMA_7
: drive
->id
->dma_ultra
|= 0x8080; break;
809 case XFER_UDMA_6
: drive
->id
->dma_ultra
|= 0x4040; break;
810 case XFER_UDMA_5
: drive
->id
->dma_ultra
|= 0x2020; break;
811 case XFER_UDMA_4
: drive
->id
->dma_ultra
|= 0x1010; break;
812 case XFER_UDMA_3
: drive
->id
->dma_ultra
|= 0x0808; break;
813 case XFER_UDMA_2
: drive
->id
->dma_ultra
|= 0x0404; break;
814 case XFER_UDMA_1
: drive
->id
->dma_ultra
|= 0x0202; break;
815 case XFER_UDMA_0
: drive
->id
->dma_ultra
|= 0x0101; break;
816 case XFER_MW_DMA_2
: drive
->id
->dma_mword
|= 0x0404; break;
817 case XFER_MW_DMA_1
: drive
->id
->dma_mword
|= 0x0202; break;
818 case XFER_MW_DMA_0
: drive
->id
->dma_mword
|= 0x0101; break;
819 case XFER_SW_DMA_2
: drive
->id
->dma_1word
|= 0x0404; break;
820 case XFER_SW_DMA_1
: drive
->id
->dma_1word
|= 0x0202; break;
821 case XFER_SW_DMA_0
: drive
->id
->dma_1word
|= 0x0101; break;
824 if (!drive
->init_speed
)
825 drive
->init_speed
= speed
;
826 drive
->current_speed
= speed
;
831 * This should get invoked any time we exit the driver to
832 * wait for an interrupt response from a drive. handler() points
833 * at the appropriate code to handle the next interrupt, and a
834 * timer is started to prevent us from waiting forever in case
835 * something goes wrong (see the ide_timer_expiry() handler later on).
837 * See also ide_execute_command
839 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
840 unsigned int timeout
, ide_expiry_t
*expiry
)
842 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
844 if (hwgroup
->handler
!= NULL
) {
845 printk(KERN_CRIT
"%s: ide_set_handler: handler not null; "
847 drive
->name
, hwgroup
->handler
, handler
);
849 hwgroup
->handler
= handler
;
850 hwgroup
->expiry
= expiry
;
851 hwgroup
->timer
.expires
= jiffies
+ timeout
;
852 hwgroup
->req_gen_timer
= hwgroup
->req_gen
;
853 add_timer(&hwgroup
->timer
);
856 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
857 unsigned int timeout
, ide_expiry_t
*expiry
)
860 spin_lock_irqsave(&ide_lock
, flags
);
861 __ide_set_handler(drive
, handler
, timeout
, expiry
);
862 spin_unlock_irqrestore(&ide_lock
, flags
);
865 EXPORT_SYMBOL(ide_set_handler
);
868 * ide_execute_command - execute an IDE command
869 * @drive: IDE drive to issue the command against
870 * @command: command byte to write
871 * @handler: handler for next phase
872 * @timeout: timeout for command
873 * @expiry: handler to run on timeout
875 * Helper function to issue an IDE command. This handles the
876 * atomicity requirements, command timing and ensures that the
877 * handler and IRQ setup do not race. All IDE command kick off
878 * should go via this function or do equivalent locking.
881 void ide_execute_command(ide_drive_t
*drive
, u8 cmd
, ide_handler_t
*handler
,
882 unsigned timeout
, ide_expiry_t
*expiry
)
885 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
886 ide_hwif_t
*hwif
= HWIF(drive
);
888 spin_lock_irqsave(&ide_lock
, flags
);
890 BUG_ON(hwgroup
->handler
);
891 hwgroup
->handler
= handler
;
892 hwgroup
->expiry
= expiry
;
893 hwgroup
->timer
.expires
= jiffies
+ timeout
;
894 hwgroup
->req_gen_timer
= hwgroup
->req_gen
;
895 add_timer(&hwgroup
->timer
);
896 hwif
->OUTBSYNC(drive
, cmd
, IDE_COMMAND_REG
);
897 /* Drive takes 400nS to respond, we must avoid the IRQ being
898 serviced before that.
900 FIXME: we could skip this delay with care on non shared
904 spin_unlock_irqrestore(&ide_lock
, flags
);
907 EXPORT_SYMBOL(ide_execute_command
);
911 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
914 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
915 * during an atapi drive reset operation. If the drive has not yet responded,
916 * and we have not yet hit our maximum waiting time, then the timer is restarted
919 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
921 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
922 ide_hwif_t
*hwif
= HWIF(drive
);
928 if (OK_STAT(stat
= hwif
->INB(IDE_STATUS_REG
), 0, BUSY_STAT
)) {
929 printk("%s: ATAPI reset complete\n", drive
->name
);
931 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
932 BUG_ON(HWGROUP(drive
)->handler
!= NULL
);
933 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
934 /* continue polling */
938 hwgroup
->polling
= 0;
939 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
941 /* do it the old fashioned way */
942 return do_reset1(drive
, 1);
945 hwgroup
->polling
= 0;
946 hwgroup
->resetting
= 0;
951 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
952 * during an ide reset operation. If the drives have not yet responded,
953 * and we have not yet hit our maximum waiting time, then the timer is restarted
956 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
958 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
959 ide_hwif_t
*hwif
= HWIF(drive
);
962 if (hwif
->reset_poll
!= NULL
) {
963 if (hwif
->reset_poll(drive
)) {
964 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
965 hwif
->name
, drive
->name
);
970 if (!OK_STAT(tmp
= hwif
->INB(IDE_STATUS_REG
), 0, BUSY_STAT
)) {
971 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
972 BUG_ON(HWGROUP(drive
)->handler
!= NULL
);
973 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
974 /* continue polling */
977 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
980 printk("%s: reset: ", hwif
->name
);
981 if ((tmp
= hwif
->INB(IDE_ERROR_REG
)) == 1) {
987 switch (tmp
& 0x7f) {
988 case 1: printk("passed");
990 case 2: printk("formatter device error");
992 case 3: printk("sector buffer error");
994 case 4: printk("ECC circuitry error");
996 case 5: printk("controlling MPU error");
998 default:printk("error (0x%02x?)", tmp
);
1001 printk("; slave: failed");
1005 hwgroup
->polling
= 0; /* done polling */
1006 hwgroup
->resetting
= 0; /* done reset attempt */
1010 static void check_dma_crc(ide_drive_t
*drive
)
1012 #ifdef CONFIG_BLK_DEV_IDEDMA
1013 if (drive
->crc_count
) {
1014 ide_dma_off_quietly(drive
);
1015 ide_set_xfer_rate(drive
, ide_auto_reduce_xfer(drive
));
1016 if (drive
->current_speed
>= XFER_SW_DMA_0
)
1023 static void ide_disk_pre_reset(ide_drive_t
*drive
)
1025 int legacy
= (drive
->id
->cfs_enable_2
& 0x0400) ? 0 : 1;
1027 drive
->special
.all
= 0;
1028 drive
->special
.b
.set_geometry
= legacy
;
1029 drive
->special
.b
.recalibrate
= legacy
;
1030 drive
->mult_count
= 0;
1031 if (!drive
->keep_settings
&& !drive
->using_dma
)
1032 drive
->mult_req
= 0;
1033 if (drive
->mult_req
!= drive
->mult_count
)
1034 drive
->special
.b
.set_multmode
= 1;
1037 static void pre_reset(ide_drive_t
*drive
)
1039 if (drive
->media
== ide_disk
)
1040 ide_disk_pre_reset(drive
);
1042 drive
->post_reset
= 1;
1044 if (!drive
->keep_settings
) {
1045 if (drive
->using_dma
) {
1046 check_dma_crc(drive
);
1049 drive
->io_32bit
= 0;
1053 if (drive
->using_dma
)
1054 check_dma_crc(drive
);
1056 if (HWIF(drive
)->pre_reset
!= NULL
)
1057 HWIF(drive
)->pre_reset(drive
);
1059 if (drive
->current_speed
!= 0xff)
1060 drive
->desired_speed
= drive
->current_speed
;
1061 drive
->current_speed
= 0xff;
1065 * do_reset1() attempts to recover a confused drive by resetting it.
1066 * Unfortunately, resetting a disk drive actually resets all devices on
1067 * the same interface, so it can really be thought of as resetting the
1068 * interface rather than resetting the drive.
1070 * ATAPI devices have their own reset mechanism which allows them to be
1071 * individually reset without clobbering other devices on the same interface.
1073 * Unfortunately, the IDE interface does not generate an interrupt to let
1074 * us know when the reset operation has finished, so we must poll for this.
1075 * Equally poor, though, is the fact that this may a very long time to complete,
1076 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1077 * we set a timer to poll at 50ms intervals.
1079 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
1082 unsigned long flags
;
1084 ide_hwgroup_t
*hwgroup
;
1086 spin_lock_irqsave(&ide_lock
, flags
);
1088 hwgroup
= HWGROUP(drive
);
1090 /* We must not reset with running handlers */
1091 BUG_ON(hwgroup
->handler
!= NULL
);
1093 /* For an ATAPI device, first try an ATAPI SRST. */
1094 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
1095 hwgroup
->resetting
= 1;
1097 SELECT_DRIVE(drive
);
1099 hwif
->OUTBSYNC(drive
, WIN_SRST
, IDE_COMMAND_REG
);
1101 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1102 hwgroup
->polling
= 1;
1103 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
1104 spin_unlock_irqrestore(&ide_lock
, flags
);
1109 * First, reset any device state data we were maintaining
1110 * for any of the drives on this interface.
1112 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
1113 pre_reset(&hwif
->drives
[unit
]);
1115 if (!IDE_CONTROL_REG
) {
1116 spin_unlock_irqrestore(&ide_lock
, flags
);
1120 hwgroup
->resetting
= 1;
1122 * Note that we also set nIEN while resetting the device,
1123 * to mask unwanted interrupts from the interface during the reset.
1124 * However, due to the design of PC hardware, this will cause an
1125 * immediate interrupt due to the edge transition it produces.
1126 * This single interrupt gives us a "fast poll" for drives that
1127 * recover from reset very quickly, saving us the first 50ms wait time.
1129 /* set SRST and nIEN */
1130 hwif
->OUTBSYNC(drive
, drive
->ctl
|6,IDE_CONTROL_REG
);
1131 /* more than enough time */
1133 if (drive
->quirk_list
== 2) {
1134 /* clear SRST and nIEN */
1135 hwif
->OUTBSYNC(drive
, drive
->ctl
, IDE_CONTROL_REG
);
1137 /* clear SRST, leave nIEN */
1138 hwif
->OUTBSYNC(drive
, drive
->ctl
|2, IDE_CONTROL_REG
);
1140 /* more than enough time */
1142 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1143 hwgroup
->polling
= 1;
1144 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1147 * Some weird controller like resetting themselves to a strange
1148 * state when the disks are reset this way. At least, the Winbond
1149 * 553 documentation says that
1151 if (hwif
->resetproc
)
1152 hwif
->resetproc(drive
);
1154 spin_unlock_irqrestore(&ide_lock
, flags
);
1159 * ide_do_reset() is the entry point to the drive/interface reset code.
1162 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
1164 return do_reset1(drive
, 0);
1167 EXPORT_SYMBOL(ide_do_reset
);
1170 * ide_wait_not_busy() waits for the currently selected device on the hwif
1171 * to report a non-busy status, see comments in probe_hwif().
1173 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
1179 * Turn this into a schedule() sleep once I'm sure
1180 * about locking issues (2.5 work ?).
1183 stat
= hwif
->INB(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1184 if ((stat
& BUSY_STAT
) == 0)
1187 * Assume a value of 0xff means nothing is connected to
1188 * the interface and it doesn't implement the pull-down
1193 touch_softlockup_watchdog();
1194 touch_nmi_watchdog();
1199 EXPORT_SYMBOL_GPL(ide_wait_not_busy
);