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>
27 #include <asm/byteorder.h>
29 #include <asm/uaccess.h>
33 * Conventional PIO operations for ATA devices
36 static u8
ide_inb (unsigned long port
)
38 return (u8
) inb(port
);
41 static u16
ide_inw (unsigned long port
)
43 return (u16
) inw(port
);
46 static void ide_insw (unsigned long port
, void *addr
, u32 count
)
48 insw(port
, addr
, count
);
51 static u32
ide_inl (unsigned long port
)
53 return (u32
) inl(port
);
56 static void ide_insl (unsigned long port
, void *addr
, u32 count
)
58 insl(port
, addr
, count
);
61 static void ide_outb (u8 val
, unsigned long port
)
66 static void ide_outbsync (ide_drive_t
*drive
, u8 addr
, unsigned long port
)
71 static void ide_outw (u16 val
, unsigned long port
)
76 static void ide_outsw (unsigned long port
, void *addr
, u32 count
)
78 outsw(port
, addr
, count
);
81 static void ide_outl (u32 val
, unsigned long port
)
86 static void ide_outsl (unsigned long port
, void *addr
, u32 count
)
88 outsl(port
, addr
, count
);
91 void default_hwif_iops (ide_hwif_t
*hwif
)
93 hwif
->OUTB
= ide_outb
;
94 hwif
->OUTBSYNC
= ide_outbsync
;
95 hwif
->OUTW
= ide_outw
;
96 hwif
->OUTL
= ide_outl
;
97 hwif
->OUTSW
= ide_outsw
;
98 hwif
->OUTSL
= ide_outsl
;
102 hwif
->INSW
= ide_insw
;
103 hwif
->INSL
= ide_insl
;
107 * MMIO operations, typically used for SATA controllers
110 static u8
ide_mm_inb (unsigned long port
)
112 return (u8
) readb((void __iomem
*) port
);
115 static u16
ide_mm_inw (unsigned long port
)
117 return (u16
) readw((void __iomem
*) port
);
120 static void ide_mm_insw (unsigned long port
, void *addr
, u32 count
)
122 __ide_mm_insw((void __iomem
*) port
, addr
, count
);
125 static u32
ide_mm_inl (unsigned long port
)
127 return (u32
) readl((void __iomem
*) port
);
130 static void ide_mm_insl (unsigned long port
, void *addr
, u32 count
)
132 __ide_mm_insl((void __iomem
*) port
, addr
, count
);
135 static void ide_mm_outb (u8 value
, unsigned long port
)
137 writeb(value
, (void __iomem
*) port
);
140 static void ide_mm_outbsync (ide_drive_t
*drive
, u8 value
, unsigned long port
)
142 writeb(value
, (void __iomem
*) port
);
145 static void ide_mm_outw (u16 value
, unsigned long port
)
147 writew(value
, (void __iomem
*) port
);
150 static void ide_mm_outsw (unsigned long port
, void *addr
, u32 count
)
152 __ide_mm_outsw((void __iomem
*) port
, addr
, count
);
155 static void ide_mm_outl (u32 value
, unsigned long port
)
157 writel(value
, (void __iomem
*) port
);
160 static void ide_mm_outsl (unsigned long port
, void *addr
, u32 count
)
162 __ide_mm_outsl((void __iomem
*) port
, addr
, count
);
165 void default_hwif_mmiops (ide_hwif_t
*hwif
)
167 hwif
->OUTB
= ide_mm_outb
;
168 /* Most systems will need to override OUTBSYNC, alas however
169 this one is controller specific! */
170 hwif
->OUTBSYNC
= ide_mm_outbsync
;
171 hwif
->OUTW
= ide_mm_outw
;
172 hwif
->OUTL
= ide_mm_outl
;
173 hwif
->OUTSW
= ide_mm_outsw
;
174 hwif
->OUTSL
= ide_mm_outsl
;
175 hwif
->INB
= ide_mm_inb
;
176 hwif
->INW
= ide_mm_inw
;
177 hwif
->INL
= ide_mm_inl
;
178 hwif
->INSW
= ide_mm_insw
;
179 hwif
->INSL
= ide_mm_insl
;
182 EXPORT_SYMBOL(default_hwif_mmiops
);
184 u32
ide_read_24 (ide_drive_t
*drive
)
186 u8 hcyl
= HWIF(drive
)->INB(IDE_HCYL_REG
);
187 u8 lcyl
= HWIF(drive
)->INB(IDE_LCYL_REG
);
188 u8 sect
= HWIF(drive
)->INB(IDE_SECTOR_REG
);
189 return (hcyl
<<16)|(lcyl
<<8)|sect
;
192 void SELECT_DRIVE (ide_drive_t
*drive
)
194 if (HWIF(drive
)->selectproc
)
195 HWIF(drive
)->selectproc(drive
);
196 HWIF(drive
)->OUTB(drive
->select
.all
, IDE_SELECT_REG
);
199 EXPORT_SYMBOL(SELECT_DRIVE
);
201 void SELECT_INTERRUPT (ide_drive_t
*drive
)
203 if (HWIF(drive
)->intrproc
)
204 HWIF(drive
)->intrproc(drive
);
206 HWIF(drive
)->OUTB(drive
->ctl
|2, IDE_CONTROL_REG
);
209 void SELECT_MASK (ide_drive_t
*drive
, int mask
)
211 if (HWIF(drive
)->maskproc
)
212 HWIF(drive
)->maskproc(drive
, mask
);
215 void QUIRK_LIST (ide_drive_t
*drive
)
217 if (HWIF(drive
)->quirkproc
)
218 drive
->quirk_list
= HWIF(drive
)->quirkproc(drive
);
222 * Some localbus EIDE interfaces require a special access sequence
223 * when using 32-bit I/O instructions to transfer data. We call this
224 * the "vlb_sync" sequence, which consists of three successive reads
225 * of the sector count register location, with interrupts disabled
226 * to ensure that the reads all happen together.
228 static void ata_vlb_sync(ide_drive_t
*drive
, unsigned long port
)
230 (void) HWIF(drive
)->INB(port
);
231 (void) HWIF(drive
)->INB(port
);
232 (void) HWIF(drive
)->INB(port
);
236 * This is used for most PIO data transfers *from* the IDE interface
238 static void ata_input_data(ide_drive_t
*drive
, void *buffer
, u32 wcount
)
240 ide_hwif_t
*hwif
= HWIF(drive
);
241 u8 io_32bit
= drive
->io_32bit
;
246 local_irq_save(flags
);
247 ata_vlb_sync(drive
, IDE_NSECTOR_REG
);
248 hwif
->INSL(IDE_DATA_REG
, buffer
, wcount
);
249 local_irq_restore(flags
);
251 hwif
->INSL(IDE_DATA_REG
, buffer
, wcount
);
253 hwif
->INSW(IDE_DATA_REG
, buffer
, wcount
<<1);
258 * This is used for most PIO data transfers *to* the IDE interface
260 static void ata_output_data(ide_drive_t
*drive
, void *buffer
, u32 wcount
)
262 ide_hwif_t
*hwif
= HWIF(drive
);
263 u8 io_32bit
= drive
->io_32bit
;
268 local_irq_save(flags
);
269 ata_vlb_sync(drive
, IDE_NSECTOR_REG
);
270 hwif
->OUTSL(IDE_DATA_REG
, buffer
, wcount
);
271 local_irq_restore(flags
);
273 hwif
->OUTSL(IDE_DATA_REG
, buffer
, wcount
);
275 hwif
->OUTSW(IDE_DATA_REG
, buffer
, wcount
<<1);
280 * The following routines are mainly used by the ATAPI drivers.
282 * These routines will round up any request for an odd number of bytes,
283 * so if an odd bytecount is specified, be sure that there's at least one
284 * extra byte allocated for the buffer.
287 static void atapi_input_bytes(ide_drive_t
*drive
, void *buffer
, u32 bytecount
)
289 ide_hwif_t
*hwif
= HWIF(drive
);
292 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
293 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
294 /* Atari has a byte-swapped IDE interface */
295 insw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
298 #endif /* CONFIG_ATARI || CONFIG_Q40 */
299 hwif
->ata_input_data(drive
, buffer
, bytecount
/ 4);
300 if ((bytecount
& 0x03) >= 2)
301 hwif
->INSW(IDE_DATA_REG
, ((u8
*)buffer
)+(bytecount
& ~0x03), 1);
304 static void atapi_output_bytes(ide_drive_t
*drive
, void *buffer
, u32 bytecount
)
306 ide_hwif_t
*hwif
= HWIF(drive
);
309 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
310 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
311 /* Atari has a byte-swapped IDE interface */
312 outsw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
315 #endif /* CONFIG_ATARI || CONFIG_Q40 */
316 hwif
->ata_output_data(drive
, buffer
, bytecount
/ 4);
317 if ((bytecount
& 0x03) >= 2)
318 hwif
->OUTSW(IDE_DATA_REG
, ((u8
*)buffer
)+(bytecount
& ~0x03), 1);
321 void default_hwif_transport(ide_hwif_t
*hwif
)
323 hwif
->ata_input_data
= ata_input_data
;
324 hwif
->ata_output_data
= ata_output_data
;
325 hwif
->atapi_input_bytes
= atapi_input_bytes
;
326 hwif
->atapi_output_bytes
= atapi_output_bytes
;
330 * Beginning of Taskfile OPCODE Library and feature sets.
332 void ide_fix_driveid (struct hd_driveid
*id
)
334 #ifndef __LITTLE_ENDIAN
339 id
->config
= __le16_to_cpu(id
->config
);
340 id
->cyls
= __le16_to_cpu(id
->cyls
);
341 id
->reserved2
= __le16_to_cpu(id
->reserved2
);
342 id
->heads
= __le16_to_cpu(id
->heads
);
343 id
->track_bytes
= __le16_to_cpu(id
->track_bytes
);
344 id
->sector_bytes
= __le16_to_cpu(id
->sector_bytes
);
345 id
->sectors
= __le16_to_cpu(id
->sectors
);
346 id
->vendor0
= __le16_to_cpu(id
->vendor0
);
347 id
->vendor1
= __le16_to_cpu(id
->vendor1
);
348 id
->vendor2
= __le16_to_cpu(id
->vendor2
);
349 stringcast
= (u16
*)&id
->serial_no
[0];
350 for (i
= 0; i
< (20/2); i
++)
351 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
352 id
->buf_type
= __le16_to_cpu(id
->buf_type
);
353 id
->buf_size
= __le16_to_cpu(id
->buf_size
);
354 id
->ecc_bytes
= __le16_to_cpu(id
->ecc_bytes
);
355 stringcast
= (u16
*)&id
->fw_rev
[0];
356 for (i
= 0; i
< (8/2); i
++)
357 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
358 stringcast
= (u16
*)&id
->model
[0];
359 for (i
= 0; i
< (40/2); i
++)
360 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
361 id
->dword_io
= __le16_to_cpu(id
->dword_io
);
362 id
->reserved50
= __le16_to_cpu(id
->reserved50
);
363 id
->field_valid
= __le16_to_cpu(id
->field_valid
);
364 id
->cur_cyls
= __le16_to_cpu(id
->cur_cyls
);
365 id
->cur_heads
= __le16_to_cpu(id
->cur_heads
);
366 id
->cur_sectors
= __le16_to_cpu(id
->cur_sectors
);
367 id
->cur_capacity0
= __le16_to_cpu(id
->cur_capacity0
);
368 id
->cur_capacity1
= __le16_to_cpu(id
->cur_capacity1
);
369 id
->lba_capacity
= __le32_to_cpu(id
->lba_capacity
);
370 id
->dma_1word
= __le16_to_cpu(id
->dma_1word
);
371 id
->dma_mword
= __le16_to_cpu(id
->dma_mword
);
372 id
->eide_pio_modes
= __le16_to_cpu(id
->eide_pio_modes
);
373 id
->eide_dma_min
= __le16_to_cpu(id
->eide_dma_min
);
374 id
->eide_dma_time
= __le16_to_cpu(id
->eide_dma_time
);
375 id
->eide_pio
= __le16_to_cpu(id
->eide_pio
);
376 id
->eide_pio_iordy
= __le16_to_cpu(id
->eide_pio_iordy
);
377 for (i
= 0; i
< 2; ++i
)
378 id
->words69_70
[i
] = __le16_to_cpu(id
->words69_70
[i
]);
379 for (i
= 0; i
< 4; ++i
)
380 id
->words71_74
[i
] = __le16_to_cpu(id
->words71_74
[i
]);
381 id
->queue_depth
= __le16_to_cpu(id
->queue_depth
);
382 for (i
= 0; i
< 4; ++i
)
383 id
->words76_79
[i
] = __le16_to_cpu(id
->words76_79
[i
]);
384 id
->major_rev_num
= __le16_to_cpu(id
->major_rev_num
);
385 id
->minor_rev_num
= __le16_to_cpu(id
->minor_rev_num
);
386 id
->command_set_1
= __le16_to_cpu(id
->command_set_1
);
387 id
->command_set_2
= __le16_to_cpu(id
->command_set_2
);
388 id
->cfsse
= __le16_to_cpu(id
->cfsse
);
389 id
->cfs_enable_1
= __le16_to_cpu(id
->cfs_enable_1
);
390 id
->cfs_enable_2
= __le16_to_cpu(id
->cfs_enable_2
);
391 id
->csf_default
= __le16_to_cpu(id
->csf_default
);
392 id
->dma_ultra
= __le16_to_cpu(id
->dma_ultra
);
393 id
->trseuc
= __le16_to_cpu(id
->trseuc
);
394 id
->trsEuc
= __le16_to_cpu(id
->trsEuc
);
395 id
->CurAPMvalues
= __le16_to_cpu(id
->CurAPMvalues
);
396 id
->mprc
= __le16_to_cpu(id
->mprc
);
397 id
->hw_config
= __le16_to_cpu(id
->hw_config
);
398 id
->acoustic
= __le16_to_cpu(id
->acoustic
);
399 id
->msrqs
= __le16_to_cpu(id
->msrqs
);
400 id
->sxfert
= __le16_to_cpu(id
->sxfert
);
401 id
->sal
= __le16_to_cpu(id
->sal
);
402 id
->spg
= __le32_to_cpu(id
->spg
);
403 id
->lba_capacity_2
= __le64_to_cpu(id
->lba_capacity_2
);
404 for (i
= 0; i
< 22; i
++)
405 id
->words104_125
[i
] = __le16_to_cpu(id
->words104_125
[i
]);
406 id
->last_lun
= __le16_to_cpu(id
->last_lun
);
407 id
->word127
= __le16_to_cpu(id
->word127
);
408 id
->dlf
= __le16_to_cpu(id
->dlf
);
409 id
->csfo
= __le16_to_cpu(id
->csfo
);
410 for (i
= 0; i
< 26; i
++)
411 id
->words130_155
[i
] = __le16_to_cpu(id
->words130_155
[i
]);
412 id
->word156
= __le16_to_cpu(id
->word156
);
413 for (i
= 0; i
< 3; i
++)
414 id
->words157_159
[i
] = __le16_to_cpu(id
->words157_159
[i
]);
415 id
->cfa_power
= __le16_to_cpu(id
->cfa_power
);
416 for (i
= 0; i
< 14; i
++)
417 id
->words161_175
[i
] = __le16_to_cpu(id
->words161_175
[i
]);
418 for (i
= 0; i
< 31; i
++)
419 id
->words176_205
[i
] = __le16_to_cpu(id
->words176_205
[i
]);
420 for (i
= 0; i
< 48; i
++)
421 id
->words206_254
[i
] = __le16_to_cpu(id
->words206_254
[i
]);
422 id
->integrity_word
= __le16_to_cpu(id
->integrity_word
);
424 # error "Please fix <asm/byteorder.h>"
429 /* FIXME: exported for use by the USB storage (isd200.c) code only */
430 EXPORT_SYMBOL(ide_fix_driveid
);
432 void ide_fixstring (u8
*s
, const int bytecount
, const int byteswap
)
434 u8
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
437 /* convert from big-endian to host byte order */
438 for (p
= end
; p
!= s
;) {
439 unsigned short *pp
= (unsigned short *) (p
-= 2);
443 /* strip leading blanks */
444 while (s
!= end
&& *s
== ' ')
446 /* compress internal blanks and strip trailing blanks */
447 while (s
!= end
&& *s
) {
448 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
451 /* wipe out trailing garbage */
456 EXPORT_SYMBOL(ide_fixstring
);
459 * Needed for PCI irq sharing
461 int drive_is_ready (ide_drive_t
*drive
)
463 ide_hwif_t
*hwif
= HWIF(drive
);
466 if (drive
->waiting_for_dma
)
467 return hwif
->ide_dma_test_irq(drive
);
470 /* need to guarantee 400ns since last command was issued */
474 #ifdef CONFIG_IDEPCI_SHARE_IRQ
476 * We do a passive status test under shared PCI interrupts on
477 * cards that truly share the ATA side interrupt, but may also share
478 * an interrupt with another pci card/device. We make no assumptions
479 * about possible isa-pnp and pci-pnp issues yet.
482 stat
= hwif
->INB(IDE_ALTSTATUS_REG
);
484 #endif /* CONFIG_IDEPCI_SHARE_IRQ */
485 /* Note: this may clear a pending IRQ!! */
486 stat
= hwif
->INB(IDE_STATUS_REG
);
488 if (stat
& BUSY_STAT
)
489 /* drive busy: definitely not interrupting */
492 /* drive ready: *might* be interrupting */
496 EXPORT_SYMBOL(drive_is_ready
);
499 * Global for All, and taken from ide-pmac.c. Can be called
500 * with spinlock held & IRQs disabled, so don't schedule !
502 int wait_for_ready (ide_drive_t
*drive
, int timeout
)
504 ide_hwif_t
*hwif
= HWIF(drive
);
508 stat
= hwif
->INB(IDE_STATUS_REG
);
509 if (!(stat
& BUSY_STAT
)) {
510 if (drive
->ready_stat
== 0)
512 else if ((stat
& drive
->ready_stat
)||(stat
& ERR_STAT
))
517 if ((stat
& ERR_STAT
) || timeout
<= 0) {
518 if (stat
& ERR_STAT
) {
519 printk(KERN_ERR
"%s: wait_for_ready, "
520 "error status: %x\n", drive
->name
, stat
);
528 * This routine busy-waits for the drive status to be not "busy".
529 * It then checks the status for all of the "good" bits and none
530 * of the "bad" bits, and if all is okay it returns 0. All other
531 * cases return 1 after invoking ide_error() -- caller should just return.
533 * This routine should get fixed to not hog the cpu during extra long waits..
534 * That could be done by busy-waiting for the first jiffy or two, and then
535 * setting a timer to wake up at half second intervals thereafter,
536 * until timeout is achieved, before timing out.
538 int ide_wait_stat (ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
)
540 ide_hwif_t
*hwif
= HWIF(drive
);
545 /* bail early if we've exceeded max_failures */
546 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
547 *startstop
= ide_stopped
;
551 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
552 if ((stat
= hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) {
553 local_irq_set(flags
);
555 while ((stat
= hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) {
556 if (time_after(jiffies
, timeout
)) {
558 * One last read after the timeout in case
559 * heavy interrupt load made us not make any
560 * progress during the timeout..
562 stat
= hwif
->INB(IDE_STATUS_REG
);
563 if (!(stat
& BUSY_STAT
))
566 local_irq_restore(flags
);
567 *startstop
= ide_error(drive
, "status timeout", stat
);
571 local_irq_restore(flags
);
574 * Allow status to settle, then read it again.
575 * A few rare drives vastly violate the 400ns spec here,
576 * so we'll wait up to 10usec for a "good" status
577 * rather than expensively fail things immediately.
578 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
580 for (i
= 0; i
< 10; i
++) {
582 if (OK_STAT((stat
= hwif
->INB(IDE_STATUS_REG
)), good
, bad
))
585 *startstop
= ide_error(drive
, "status error", stat
);
589 EXPORT_SYMBOL(ide_wait_stat
);
592 * All hosts that use the 80c ribbon must use!
593 * The name is derived from upper byte of word 93 and the 80c ribbon.
595 u8
eighty_ninty_three (ide_drive_t
*drive
)
597 if(HWIF(drive
)->udma_four
== 0)
600 /* Check for SATA but only if we are ATA5 or higher */
601 if (drive
->id
->hw_config
== 0 && (drive
->id
->major_rev_num
& 0x7FE0))
603 if (!(drive
->id
->hw_config
& 0x6000))
605 #ifndef CONFIG_IDEDMA_IVB
606 if(!(drive
->id
->hw_config
& 0x4000))
608 #endif /* CONFIG_IDEDMA_IVB */
612 EXPORT_SYMBOL(eighty_ninty_three
);
614 int ide_ata66_check (ide_drive_t
*drive
, ide_task_t
*args
)
616 if ((args
->tfRegister
[IDE_COMMAND_OFFSET
] == WIN_SETFEATURES
) &&
617 (args
->tfRegister
[IDE_SECTOR_OFFSET
] > XFER_UDMA_2
) &&
618 (args
->tfRegister
[IDE_FEATURE_OFFSET
] == SETFEATURES_XFER
)) {
619 #ifndef CONFIG_IDEDMA_IVB
620 if ((drive
->id
->hw_config
& 0x6000) == 0) {
621 #else /* !CONFIG_IDEDMA_IVB */
622 if (((drive
->id
->hw_config
& 0x2000) == 0) ||
623 ((drive
->id
->hw_config
& 0x4000) == 0)) {
624 #endif /* CONFIG_IDEDMA_IVB */
625 printk("%s: Speed warnings UDMA 3/4/5 is not "
626 "functional.\n", drive
->name
);
629 if (!HWIF(drive
)->udma_four
) {
630 printk("%s: Speed warnings UDMA 3/4/5 is not "
640 * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER.
641 * 1 : Safe to update drive->id DMA registers.
642 * 0 : OOPs not allowed.
644 int set_transfer (ide_drive_t
*drive
, ide_task_t
*args
)
646 if ((args
->tfRegister
[IDE_COMMAND_OFFSET
] == WIN_SETFEATURES
) &&
647 (args
->tfRegister
[IDE_SECTOR_OFFSET
] >= XFER_SW_DMA_0
) &&
648 (args
->tfRegister
[IDE_FEATURE_OFFSET
] == SETFEATURES_XFER
) &&
649 (drive
->id
->dma_ultra
||
650 drive
->id
->dma_mword
||
651 drive
->id
->dma_1word
))
657 #ifdef CONFIG_BLK_DEV_IDEDMA
658 static u8
ide_auto_reduce_xfer (ide_drive_t
*drive
)
660 if (!drive
->crc_count
)
661 return drive
->current_speed
;
662 drive
->crc_count
= 0;
664 switch(drive
->current_speed
) {
665 case XFER_UDMA_7
: return XFER_UDMA_6
;
666 case XFER_UDMA_6
: return XFER_UDMA_5
;
667 case XFER_UDMA_5
: return XFER_UDMA_4
;
668 case XFER_UDMA_4
: return XFER_UDMA_3
;
669 case XFER_UDMA_3
: return XFER_UDMA_2
;
670 case XFER_UDMA_2
: return XFER_UDMA_1
;
671 case XFER_UDMA_1
: return XFER_UDMA_0
;
673 * OOPS we do not goto non Ultra DMA modes
674 * without iCRC's available we force
675 * the system to PIO and make the user
676 * invoke the ATA-1 ATA-2 DMA modes.
679 default: return XFER_PIO_4
;
682 #endif /* CONFIG_BLK_DEV_IDEDMA */
687 int ide_driveid_update (ide_drive_t
*drive
)
689 ide_hwif_t
*hwif
= HWIF(drive
);
690 struct hd_driveid
*id
;
692 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
696 taskfile_lib_get_identify(drive
, (char *)&id
);
700 drive
->id
->dma_ultra
= id
->dma_ultra
;
701 drive
->id
->dma_mword
= id
->dma_mword
;
702 drive
->id
->dma_1word
= id
->dma_1word
;
703 /* anything more ? */
709 * Re-read drive->id for possible DMA mode
710 * change (copied from ide-probe.c)
712 unsigned long timeout
, flags
;
714 SELECT_MASK(drive
, 1);
716 hwif
->OUTB(drive
->ctl
,IDE_CONTROL_REG
);
718 hwif
->OUTB(WIN_IDENTIFY
, IDE_COMMAND_REG
);
719 timeout
= jiffies
+ WAIT_WORSTCASE
;
721 if (time_after(jiffies
, timeout
)) {
722 SELECT_MASK(drive
, 0);
723 return 0; /* drive timed-out */
725 msleep(50); /* give drive a breather */
726 } while (hwif
->INB(IDE_ALTSTATUS_REG
) & BUSY_STAT
);
727 msleep(50); /* wait for IRQ and DRQ_STAT */
728 if (!OK_STAT(hwif
->INB(IDE_STATUS_REG
),DRQ_STAT
,BAD_R_STAT
)) {
729 SELECT_MASK(drive
, 0);
730 printk("%s: CHECK for good STATUS\n", drive
->name
);
733 local_irq_save(flags
);
734 SELECT_MASK(drive
, 0);
735 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
737 local_irq_restore(flags
);
740 ata_input_data(drive
, id
, SECTOR_WORDS
);
741 (void) hwif
->INB(IDE_STATUS_REG
); /* clear drive IRQ */
743 local_irq_restore(flags
);
746 drive
->id
->dma_ultra
= id
->dma_ultra
;
747 drive
->id
->dma_mword
= id
->dma_mword
;
748 drive
->id
->dma_1word
= id
->dma_1word
;
749 /* anything more ? */
758 * Similar to ide_wait_stat(), except it never calls ide_error internally.
759 * This is a kludge to handle the new ide_config_drive_speed() function,
760 * and should not otherwise be used anywhere. Eventually, the tuneproc's
761 * should be updated to return ide_startstop_t, in which case we can get
762 * rid of this abomination again. :) -ml
764 * It is gone..........
766 * const char *msg == consider adding for verbose errors.
768 int ide_config_drive_speed (ide_drive_t
*drive
, u8 speed
)
770 ide_hwif_t
*hwif
= HWIF(drive
);
774 // while (HWGROUP(drive)->busy)
777 #ifdef CONFIG_BLK_DEV_IDEDMA
778 if (hwif
->ide_dma_check
) /* check if host supports DMA */
779 hwif
->ide_dma_host_off(drive
);
783 * Don't use ide_wait_cmd here - it will
784 * attempt to set_geometry and recalibrate,
785 * but for some reason these don't work at
786 * this point (lost interrupt).
789 * Select the drive, and issue the SETFEATURES command
791 disable_irq_nosync(hwif
->irq
);
794 * FIXME: we race against the running IRQ here if
795 * this is called from non IRQ context. If we use
796 * disable_irq() we hang on the error path. Work
802 SELECT_MASK(drive
, 0);
805 hwif
->OUTB(drive
->ctl
| 2, IDE_CONTROL_REG
);
806 hwif
->OUTB(speed
, IDE_NSECTOR_REG
);
807 hwif
->OUTB(SETFEATURES_XFER
, IDE_FEATURE_REG
);
808 hwif
->OUTB(WIN_SETFEATURES
, IDE_COMMAND_REG
);
809 if ((IDE_CONTROL_REG
) && (drive
->quirk_list
== 2))
810 hwif
->OUTB(drive
->ctl
, IDE_CONTROL_REG
);
813 * Wait for drive to become non-BUSY
815 if ((stat
= hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) {
816 unsigned long flags
, timeout
;
817 local_irq_set(flags
);
818 timeout
= jiffies
+ WAIT_CMD
;
819 while ((stat
= hwif
->INB(IDE_STATUS_REG
)) & BUSY_STAT
) {
820 if (time_after(jiffies
, timeout
))
823 local_irq_restore(flags
);
827 * Allow status to settle, then read it again.
828 * A few rare drives vastly violate the 400ns spec here,
829 * so we'll wait up to 10usec for a "good" status
830 * rather than expensively fail things immediately.
831 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
833 for (i
= 0; i
< 10; i
++) {
835 if (OK_STAT((stat
= hwif
->INB(IDE_STATUS_REG
)), DRIVE_READY
, BUSY_STAT
|DRQ_STAT
|ERR_STAT
)) {
841 SELECT_MASK(drive
, 0);
843 enable_irq(hwif
->irq
);
846 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
850 drive
->id
->dma_ultra
&= ~0xFF00;
851 drive
->id
->dma_mword
&= ~0x0F00;
852 drive
->id
->dma_1word
&= ~0x0F00;
854 #ifdef CONFIG_BLK_DEV_IDEDMA
855 if (speed
>= XFER_SW_DMA_0
)
856 hwif
->ide_dma_host_on(drive
);
857 else if (hwif
->ide_dma_check
) /* check if host supports DMA */
858 hwif
->ide_dma_off_quietly(drive
);
862 case XFER_UDMA_7
: drive
->id
->dma_ultra
|= 0x8080; break;
863 case XFER_UDMA_6
: drive
->id
->dma_ultra
|= 0x4040; break;
864 case XFER_UDMA_5
: drive
->id
->dma_ultra
|= 0x2020; break;
865 case XFER_UDMA_4
: drive
->id
->dma_ultra
|= 0x1010; break;
866 case XFER_UDMA_3
: drive
->id
->dma_ultra
|= 0x0808; break;
867 case XFER_UDMA_2
: drive
->id
->dma_ultra
|= 0x0404; break;
868 case XFER_UDMA_1
: drive
->id
->dma_ultra
|= 0x0202; break;
869 case XFER_UDMA_0
: drive
->id
->dma_ultra
|= 0x0101; break;
870 case XFER_MW_DMA_2
: drive
->id
->dma_mword
|= 0x0404; break;
871 case XFER_MW_DMA_1
: drive
->id
->dma_mword
|= 0x0202; break;
872 case XFER_MW_DMA_0
: drive
->id
->dma_mword
|= 0x0101; break;
873 case XFER_SW_DMA_2
: drive
->id
->dma_1word
|= 0x0404; break;
874 case XFER_SW_DMA_1
: drive
->id
->dma_1word
|= 0x0202; break;
875 case XFER_SW_DMA_0
: drive
->id
->dma_1word
|= 0x0101; break;
878 if (!drive
->init_speed
)
879 drive
->init_speed
= speed
;
880 drive
->current_speed
= speed
;
884 EXPORT_SYMBOL(ide_config_drive_speed
);
888 * This should get invoked any time we exit the driver to
889 * wait for an interrupt response from a drive. handler() points
890 * at the appropriate code to handle the next interrupt, and a
891 * timer is started to prevent us from waiting forever in case
892 * something goes wrong (see the ide_timer_expiry() handler later on).
894 * See also ide_execute_command
896 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
897 unsigned int timeout
, ide_expiry_t
*expiry
)
899 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
901 if (hwgroup
->handler
!= NULL
) {
902 printk(KERN_CRIT
"%s: ide_set_handler: handler not null; "
904 drive
->name
, hwgroup
->handler
, handler
);
906 hwgroup
->handler
= handler
;
907 hwgroup
->expiry
= expiry
;
908 hwgroup
->timer
.expires
= jiffies
+ timeout
;
909 add_timer(&hwgroup
->timer
);
912 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
913 unsigned int timeout
, ide_expiry_t
*expiry
)
916 spin_lock_irqsave(&ide_lock
, flags
);
917 __ide_set_handler(drive
, handler
, timeout
, expiry
);
918 spin_unlock_irqrestore(&ide_lock
, flags
);
921 EXPORT_SYMBOL(ide_set_handler
);
924 * ide_execute_command - execute an IDE command
925 * @drive: IDE drive to issue the command against
926 * @command: command byte to write
927 * @handler: handler for next phase
928 * @timeout: timeout for command
929 * @expiry: handler to run on timeout
931 * Helper function to issue an IDE command. This handles the
932 * atomicity requirements, command timing and ensures that the
933 * handler and IRQ setup do not race. All IDE command kick off
934 * should go via this function or do equivalent locking.
937 void ide_execute_command(ide_drive_t
*drive
, task_ioreg_t cmd
, ide_handler_t
*handler
, unsigned timeout
, ide_expiry_t
*expiry
)
940 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
941 ide_hwif_t
*hwif
= HWIF(drive
);
943 spin_lock_irqsave(&ide_lock
, flags
);
945 BUG_ON(hwgroup
->handler
);
946 hwgroup
->handler
= handler
;
947 hwgroup
->expiry
= expiry
;
948 hwgroup
->timer
.expires
= jiffies
+ timeout
;
949 add_timer(&hwgroup
->timer
);
950 hwif
->OUTBSYNC(drive
, cmd
, IDE_COMMAND_REG
);
951 /* Drive takes 400nS to respond, we must avoid the IRQ being
952 serviced before that.
954 FIXME: we could skip this delay with care on non shared
958 spin_unlock_irqrestore(&ide_lock
, flags
);
961 EXPORT_SYMBOL(ide_execute_command
);
965 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
968 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
969 * during an atapi drive reset operation. If the drive has not yet responded,
970 * and we have not yet hit our maximum waiting time, then the timer is restarted
973 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
975 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
976 ide_hwif_t
*hwif
= HWIF(drive
);
982 if (OK_STAT(stat
= hwif
->INB(IDE_STATUS_REG
), 0, BUSY_STAT
)) {
983 printk("%s: ATAPI reset complete\n", drive
->name
);
985 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
986 BUG_ON(HWGROUP(drive
)->handler
!= NULL
);
987 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
988 /* continue polling */
992 hwgroup
->polling
= 0;
993 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
995 /* do it the old fashioned way */
996 return do_reset1(drive
, 1);
999 hwgroup
->polling
= 0;
1004 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
1005 * during an ide reset operation. If the drives have not yet responded,
1006 * and we have not yet hit our maximum waiting time, then the timer is restarted
1009 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
1011 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
1012 ide_hwif_t
*hwif
= HWIF(drive
);
1015 if (hwif
->reset_poll
!= NULL
) {
1016 if (hwif
->reset_poll(drive
)) {
1017 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
1018 hwif
->name
, drive
->name
);
1023 if (!OK_STAT(tmp
= hwif
->INB(IDE_STATUS_REG
), 0, BUSY_STAT
)) {
1024 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
1025 BUG_ON(HWGROUP(drive
)->handler
!= NULL
);
1026 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1027 /* continue polling */
1030 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
1033 printk("%s: reset: ", hwif
->name
);
1034 if ((tmp
= hwif
->INB(IDE_ERROR_REG
)) == 1) {
1035 printk("success\n");
1036 drive
->failures
= 0;
1040 switch (tmp
& 0x7f) {
1041 case 1: printk("passed");
1043 case 2: printk("formatter device error");
1045 case 3: printk("sector buffer error");
1047 case 4: printk("ECC circuitry error");
1049 case 5: printk("controlling MPU error");
1051 default:printk("error (0x%02x?)", tmp
);
1054 printk("; slave: failed");
1058 hwgroup
->polling
= 0; /* done polling */
1062 static void check_dma_crc(ide_drive_t
*drive
)
1064 #ifdef CONFIG_BLK_DEV_IDEDMA
1065 if (drive
->crc_count
) {
1066 (void) HWIF(drive
)->ide_dma_off_quietly(drive
);
1067 ide_set_xfer_rate(drive
, ide_auto_reduce_xfer(drive
));
1068 if (drive
->current_speed
>= XFER_SW_DMA_0
)
1069 (void) HWIF(drive
)->ide_dma_on(drive
);
1071 (void)__ide_dma_off(drive
);
1075 static void ide_disk_pre_reset(ide_drive_t
*drive
)
1077 int legacy
= (drive
->id
->cfs_enable_2
& 0x0400) ? 0 : 1;
1079 drive
->special
.all
= 0;
1080 drive
->special
.b
.set_geometry
= legacy
;
1081 drive
->special
.b
.recalibrate
= legacy
;
1082 if (OK_TO_RESET_CONTROLLER
)
1083 drive
->mult_count
= 0;
1084 if (!drive
->keep_settings
&& !drive
->using_dma
)
1085 drive
->mult_req
= 0;
1086 if (drive
->mult_req
!= drive
->mult_count
)
1087 drive
->special
.b
.set_multmode
= 1;
1090 static void pre_reset(ide_drive_t
*drive
)
1092 if (drive
->media
== ide_disk
)
1093 ide_disk_pre_reset(drive
);
1095 drive
->post_reset
= 1;
1097 if (!drive
->keep_settings
) {
1098 if (drive
->using_dma
) {
1099 check_dma_crc(drive
);
1102 drive
->io_32bit
= 0;
1106 if (drive
->using_dma
)
1107 check_dma_crc(drive
);
1109 if (HWIF(drive
)->pre_reset
!= NULL
)
1110 HWIF(drive
)->pre_reset(drive
);
1115 * do_reset1() attempts to recover a confused drive by resetting it.
1116 * Unfortunately, resetting a disk drive actually resets all devices on
1117 * the same interface, so it can really be thought of as resetting the
1118 * interface rather than resetting the drive.
1120 * ATAPI devices have their own reset mechanism which allows them to be
1121 * individually reset without clobbering other devices on the same interface.
1123 * Unfortunately, the IDE interface does not generate an interrupt to let
1124 * us know when the reset operation has finished, so we must poll for this.
1125 * Equally poor, though, is the fact that this may a very long time to complete,
1126 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1127 * we set a timer to poll at 50ms intervals.
1129 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
1132 unsigned long flags
;
1134 ide_hwgroup_t
*hwgroup
;
1136 spin_lock_irqsave(&ide_lock
, flags
);
1138 hwgroup
= HWGROUP(drive
);
1140 /* We must not reset with running handlers */
1141 BUG_ON(hwgroup
->handler
!= NULL
);
1143 /* For an ATAPI device, first try an ATAPI SRST. */
1144 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
1146 SELECT_DRIVE(drive
);
1148 hwif
->OUTBSYNC(drive
, WIN_SRST
, IDE_COMMAND_REG
);
1150 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1151 hwgroup
->polling
= 1;
1152 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
1153 spin_unlock_irqrestore(&ide_lock
, flags
);
1158 * First, reset any device state data we were maintaining
1159 * for any of the drives on this interface.
1161 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
1162 pre_reset(&hwif
->drives
[unit
]);
1164 #if OK_TO_RESET_CONTROLLER
1165 if (!IDE_CONTROL_REG
) {
1166 spin_unlock_irqrestore(&ide_lock
, flags
);
1171 * Note that we also set nIEN while resetting the device,
1172 * to mask unwanted interrupts from the interface during the reset.
1173 * However, due to the design of PC hardware, this will cause an
1174 * immediate interrupt due to the edge transition it produces.
1175 * This single interrupt gives us a "fast poll" for drives that
1176 * recover from reset very quickly, saving us the first 50ms wait time.
1178 /* set SRST and nIEN */
1179 hwif
->OUTBSYNC(drive
, drive
->ctl
|6,IDE_CONTROL_REG
);
1180 /* more than enough time */
1182 if (drive
->quirk_list
== 2) {
1183 /* clear SRST and nIEN */
1184 hwif
->OUTBSYNC(drive
, drive
->ctl
, IDE_CONTROL_REG
);
1186 /* clear SRST, leave nIEN */
1187 hwif
->OUTBSYNC(drive
, drive
->ctl
|2, IDE_CONTROL_REG
);
1189 /* more than enough time */
1191 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1192 hwgroup
->polling
= 1;
1193 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1196 * Some weird controller like resetting themselves to a strange
1197 * state when the disks are reset this way. At least, the Winbond
1198 * 553 documentation says that
1200 if (hwif
->resetproc
!= NULL
) {
1201 hwif
->resetproc(drive
);
1204 #endif /* OK_TO_RESET_CONTROLLER */
1206 spin_unlock_irqrestore(&ide_lock
, flags
);
1211 * ide_do_reset() is the entry point to the drive/interface reset code.
1214 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
1216 return do_reset1(drive
, 0);
1219 EXPORT_SYMBOL(ide_do_reset
);
1222 * ide_wait_not_busy() waits for the currently selected device on the hwif
1223 * to report a non-busy status, see comments in probe_hwif().
1225 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
1231 * Turn this into a schedule() sleep once I'm sure
1232 * about locking issues (2.5 work ?).
1235 stat
= hwif
->INB(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1236 if ((stat
& BUSY_STAT
) == 0)
1239 * Assume a value of 0xff means nothing is connected to
1240 * the interface and it doesn't implement the pull-down
1245 touch_softlockup_watchdog();
1250 EXPORT_SYMBOL_GPL(ide_wait_not_busy
);