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 u16
ide_inw (unsigned long port
)
42 return (u16
) inw(port
);
45 static void ide_insw (unsigned long port
, void *addr
, u32 count
)
47 insw(port
, addr
, count
);
50 static void ide_insl (unsigned long port
, void *addr
, u32 count
)
52 insl(port
, addr
, count
);
55 static void ide_outb (u8 val
, unsigned long port
)
60 static void ide_outbsync (ide_drive_t
*drive
, u8 addr
, unsigned long port
)
65 static void ide_outw (u16 val
, unsigned long port
)
70 static void ide_outsw (unsigned long port
, void *addr
, u32 count
)
72 outsw(port
, addr
, count
);
75 static void ide_outsl (unsigned long port
, void *addr
, u32 count
)
77 outsl(port
, addr
, count
);
80 void default_hwif_iops (ide_hwif_t
*hwif
)
82 hwif
->OUTB
= ide_outb
;
83 hwif
->OUTBSYNC
= ide_outbsync
;
84 hwif
->OUTW
= ide_outw
;
85 hwif
->OUTSW
= ide_outsw
;
86 hwif
->OUTSL
= ide_outsl
;
89 hwif
->INSW
= ide_insw
;
90 hwif
->INSL
= ide_insl
;
94 * MMIO operations, typically used for SATA controllers
97 static u8
ide_mm_inb (unsigned long port
)
99 return (u8
) readb((void __iomem
*) port
);
102 static u16
ide_mm_inw (unsigned long port
)
104 return (u16
) readw((void __iomem
*) port
);
107 static void ide_mm_insw (unsigned long port
, void *addr
, u32 count
)
109 __ide_mm_insw((void __iomem
*) port
, addr
, count
);
112 static void ide_mm_insl (unsigned long port
, void *addr
, u32 count
)
114 __ide_mm_insl((void __iomem
*) port
, addr
, count
);
117 static void ide_mm_outb (u8 value
, unsigned long port
)
119 writeb(value
, (void __iomem
*) port
);
122 static void ide_mm_outbsync (ide_drive_t
*drive
, u8 value
, unsigned long port
)
124 writeb(value
, (void __iomem
*) port
);
127 static void ide_mm_outw (u16 value
, unsigned long port
)
129 writew(value
, (void __iomem
*) port
);
132 static void ide_mm_outsw (unsigned long port
, void *addr
, u32 count
)
134 __ide_mm_outsw((void __iomem
*) port
, addr
, count
);
137 static void ide_mm_outsl (unsigned long port
, void *addr
, u32 count
)
139 __ide_mm_outsl((void __iomem
*) port
, addr
, count
);
142 void default_hwif_mmiops (ide_hwif_t
*hwif
)
144 hwif
->OUTB
= ide_mm_outb
;
145 /* Most systems will need to override OUTBSYNC, alas however
146 this one is controller specific! */
147 hwif
->OUTBSYNC
= ide_mm_outbsync
;
148 hwif
->OUTW
= ide_mm_outw
;
149 hwif
->OUTSW
= ide_mm_outsw
;
150 hwif
->OUTSL
= ide_mm_outsl
;
151 hwif
->INB
= ide_mm_inb
;
152 hwif
->INW
= ide_mm_inw
;
153 hwif
->INSW
= ide_mm_insw
;
154 hwif
->INSL
= ide_mm_insl
;
157 EXPORT_SYMBOL(default_hwif_mmiops
);
159 void SELECT_DRIVE (ide_drive_t
*drive
)
161 ide_hwif_t
*hwif
= drive
->hwif
;
162 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
164 if (port_ops
&& port_ops
->selectproc
)
165 port_ops
->selectproc(drive
);
167 hwif
->OUTB(drive
->select
.all
, hwif
->io_ports
[IDE_SELECT_OFFSET
]);
170 void SELECT_MASK (ide_drive_t
*drive
, int mask
)
172 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
174 if (port_ops
&& port_ops
->maskproc
)
175 port_ops
->maskproc(drive
, mask
);
179 * Some localbus EIDE interfaces require a special access sequence
180 * when using 32-bit I/O instructions to transfer data. We call this
181 * the "vlb_sync" sequence, which consists of three successive reads
182 * of the sector count register location, with interrupts disabled
183 * to ensure that the reads all happen together.
185 static void ata_vlb_sync(ide_drive_t
*drive
, unsigned long port
)
187 (void) HWIF(drive
)->INB(port
);
188 (void) HWIF(drive
)->INB(port
);
189 (void) HWIF(drive
)->INB(port
);
193 * This is used for most PIO data transfers *from* the IDE interface
195 static void ata_input_data(ide_drive_t
*drive
, void *buffer
, u32 wcount
)
197 ide_hwif_t
*hwif
= HWIF(drive
);
198 u8 io_32bit
= drive
->io_32bit
;
204 local_irq_save(flags
);
205 ata_vlb_sync(drive
, hwif
->io_ports
[IDE_NSECTOR_OFFSET
]);
206 hwif
->INSL(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
208 local_irq_restore(flags
);
210 hwif
->INSL(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
213 hwif
->INSW(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
218 * This is used for most PIO data transfers *to* the IDE interface
220 static void ata_output_data(ide_drive_t
*drive
, void *buffer
, u32 wcount
)
222 ide_hwif_t
*hwif
= HWIF(drive
);
223 u8 io_32bit
= drive
->io_32bit
;
229 local_irq_save(flags
);
230 ata_vlb_sync(drive
, hwif
->io_ports
[IDE_NSECTOR_OFFSET
]);
231 hwif
->OUTSL(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
233 local_irq_restore(flags
);
235 hwif
->OUTSL(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
238 hwif
->OUTSW(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
243 * The following routines are mainly used by the ATAPI drivers.
245 * These routines will round up any request for an odd number of bytes,
246 * so if an odd bytecount is specified, be sure that there's at least one
247 * extra byte allocated for the buffer.
250 static void atapi_input_bytes(ide_drive_t
*drive
, void *buffer
, u32 bytecount
)
252 ide_hwif_t
*hwif
= HWIF(drive
);
255 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
256 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
257 /* Atari has a byte-swapped IDE interface */
258 insw_swapw(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
262 #endif /* CONFIG_ATARI || CONFIG_Q40 */
263 hwif
->ata_input_data(drive
, buffer
, bytecount
/ 4);
264 if ((bytecount
& 0x03) >= 2)
265 hwif
->INSW(hwif
->io_ports
[IDE_DATA_OFFSET
],
266 (u8
*)buffer
+ (bytecount
& ~0x03), 1);
269 static void atapi_output_bytes(ide_drive_t
*drive
, void *buffer
, u32 bytecount
)
271 ide_hwif_t
*hwif
= HWIF(drive
);
274 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
275 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
276 /* Atari has a byte-swapped IDE interface */
277 outsw_swapw(hwif
->io_ports
[IDE_DATA_OFFSET
], buffer
,
281 #endif /* CONFIG_ATARI || CONFIG_Q40 */
282 hwif
->ata_output_data(drive
, buffer
, bytecount
/ 4);
283 if ((bytecount
& 0x03) >= 2)
284 hwif
->OUTSW(hwif
->io_ports
[IDE_DATA_OFFSET
],
285 (u8
*)buffer
+ (bytecount
& ~0x03), 1);
288 void default_hwif_transport(ide_hwif_t
*hwif
)
290 hwif
->ata_input_data
= ata_input_data
;
291 hwif
->ata_output_data
= ata_output_data
;
292 hwif
->atapi_input_bytes
= atapi_input_bytes
;
293 hwif
->atapi_output_bytes
= atapi_output_bytes
;
296 void ide_fix_driveid (struct hd_driveid
*id
)
298 #ifndef __LITTLE_ENDIAN
303 id
->config
= __le16_to_cpu(id
->config
);
304 id
->cyls
= __le16_to_cpu(id
->cyls
);
305 id
->reserved2
= __le16_to_cpu(id
->reserved2
);
306 id
->heads
= __le16_to_cpu(id
->heads
);
307 id
->track_bytes
= __le16_to_cpu(id
->track_bytes
);
308 id
->sector_bytes
= __le16_to_cpu(id
->sector_bytes
);
309 id
->sectors
= __le16_to_cpu(id
->sectors
);
310 id
->vendor0
= __le16_to_cpu(id
->vendor0
);
311 id
->vendor1
= __le16_to_cpu(id
->vendor1
);
312 id
->vendor2
= __le16_to_cpu(id
->vendor2
);
313 stringcast
= (u16
*)&id
->serial_no
[0];
314 for (i
= 0; i
< (20/2); i
++)
315 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
316 id
->buf_type
= __le16_to_cpu(id
->buf_type
);
317 id
->buf_size
= __le16_to_cpu(id
->buf_size
);
318 id
->ecc_bytes
= __le16_to_cpu(id
->ecc_bytes
);
319 stringcast
= (u16
*)&id
->fw_rev
[0];
320 for (i
= 0; i
< (8/2); i
++)
321 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
322 stringcast
= (u16
*)&id
->model
[0];
323 for (i
= 0; i
< (40/2); i
++)
324 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
325 id
->dword_io
= __le16_to_cpu(id
->dword_io
);
326 id
->reserved50
= __le16_to_cpu(id
->reserved50
);
327 id
->field_valid
= __le16_to_cpu(id
->field_valid
);
328 id
->cur_cyls
= __le16_to_cpu(id
->cur_cyls
);
329 id
->cur_heads
= __le16_to_cpu(id
->cur_heads
);
330 id
->cur_sectors
= __le16_to_cpu(id
->cur_sectors
);
331 id
->cur_capacity0
= __le16_to_cpu(id
->cur_capacity0
);
332 id
->cur_capacity1
= __le16_to_cpu(id
->cur_capacity1
);
333 id
->lba_capacity
= __le32_to_cpu(id
->lba_capacity
);
334 id
->dma_1word
= __le16_to_cpu(id
->dma_1word
);
335 id
->dma_mword
= __le16_to_cpu(id
->dma_mword
);
336 id
->eide_pio_modes
= __le16_to_cpu(id
->eide_pio_modes
);
337 id
->eide_dma_min
= __le16_to_cpu(id
->eide_dma_min
);
338 id
->eide_dma_time
= __le16_to_cpu(id
->eide_dma_time
);
339 id
->eide_pio
= __le16_to_cpu(id
->eide_pio
);
340 id
->eide_pio_iordy
= __le16_to_cpu(id
->eide_pio_iordy
);
341 for (i
= 0; i
< 2; ++i
)
342 id
->words69_70
[i
] = __le16_to_cpu(id
->words69_70
[i
]);
343 for (i
= 0; i
< 4; ++i
)
344 id
->words71_74
[i
] = __le16_to_cpu(id
->words71_74
[i
]);
345 id
->queue_depth
= __le16_to_cpu(id
->queue_depth
);
346 for (i
= 0; i
< 4; ++i
)
347 id
->words76_79
[i
] = __le16_to_cpu(id
->words76_79
[i
]);
348 id
->major_rev_num
= __le16_to_cpu(id
->major_rev_num
);
349 id
->minor_rev_num
= __le16_to_cpu(id
->minor_rev_num
);
350 id
->command_set_1
= __le16_to_cpu(id
->command_set_1
);
351 id
->command_set_2
= __le16_to_cpu(id
->command_set_2
);
352 id
->cfsse
= __le16_to_cpu(id
->cfsse
);
353 id
->cfs_enable_1
= __le16_to_cpu(id
->cfs_enable_1
);
354 id
->cfs_enable_2
= __le16_to_cpu(id
->cfs_enable_2
);
355 id
->csf_default
= __le16_to_cpu(id
->csf_default
);
356 id
->dma_ultra
= __le16_to_cpu(id
->dma_ultra
);
357 id
->trseuc
= __le16_to_cpu(id
->trseuc
);
358 id
->trsEuc
= __le16_to_cpu(id
->trsEuc
);
359 id
->CurAPMvalues
= __le16_to_cpu(id
->CurAPMvalues
);
360 id
->mprc
= __le16_to_cpu(id
->mprc
);
361 id
->hw_config
= __le16_to_cpu(id
->hw_config
);
362 id
->acoustic
= __le16_to_cpu(id
->acoustic
);
363 id
->msrqs
= __le16_to_cpu(id
->msrqs
);
364 id
->sxfert
= __le16_to_cpu(id
->sxfert
);
365 id
->sal
= __le16_to_cpu(id
->sal
);
366 id
->spg
= __le32_to_cpu(id
->spg
);
367 id
->lba_capacity_2
= __le64_to_cpu(id
->lba_capacity_2
);
368 for (i
= 0; i
< 22; i
++)
369 id
->words104_125
[i
] = __le16_to_cpu(id
->words104_125
[i
]);
370 id
->last_lun
= __le16_to_cpu(id
->last_lun
);
371 id
->word127
= __le16_to_cpu(id
->word127
);
372 id
->dlf
= __le16_to_cpu(id
->dlf
);
373 id
->csfo
= __le16_to_cpu(id
->csfo
);
374 for (i
= 0; i
< 26; i
++)
375 id
->words130_155
[i
] = __le16_to_cpu(id
->words130_155
[i
]);
376 id
->word156
= __le16_to_cpu(id
->word156
);
377 for (i
= 0; i
< 3; i
++)
378 id
->words157_159
[i
] = __le16_to_cpu(id
->words157_159
[i
]);
379 id
->cfa_power
= __le16_to_cpu(id
->cfa_power
);
380 for (i
= 0; i
< 14; i
++)
381 id
->words161_175
[i
] = __le16_to_cpu(id
->words161_175
[i
]);
382 for (i
= 0; i
< 31; i
++)
383 id
->words176_205
[i
] = __le16_to_cpu(id
->words176_205
[i
]);
384 for (i
= 0; i
< 48; i
++)
385 id
->words206_254
[i
] = __le16_to_cpu(id
->words206_254
[i
]);
386 id
->integrity_word
= __le16_to_cpu(id
->integrity_word
);
388 # error "Please fix <asm/byteorder.h>"
394 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
395 * removing leading/trailing blanks and compressing internal blanks.
396 * It is primarily used to tidy up the model name/number fields as
397 * returned by the WIN_[P]IDENTIFY commands.
400 void ide_fixstring (u8
*s
, const int bytecount
, const int byteswap
)
402 u8
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
405 /* convert from big-endian to host byte order */
406 for (p
= end
; p
!= s
;) {
407 unsigned short *pp
= (unsigned short *) (p
-= 2);
411 /* strip leading blanks */
412 while (s
!= end
&& *s
== ' ')
414 /* compress internal blanks and strip trailing blanks */
415 while (s
!= end
&& *s
) {
416 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
419 /* wipe out trailing garbage */
424 EXPORT_SYMBOL(ide_fixstring
);
427 * Needed for PCI irq sharing
429 int drive_is_ready (ide_drive_t
*drive
)
431 ide_hwif_t
*hwif
= HWIF(drive
);
434 if (drive
->waiting_for_dma
)
435 return hwif
->dma_ops
->dma_test_irq(drive
);
438 /* need to guarantee 400ns since last command was issued */
443 * We do a passive status test under shared PCI interrupts on
444 * cards that truly share the ATA side interrupt, but may also share
445 * an interrupt with another pci card/device. We make no assumptions
446 * about possible isa-pnp and pci-pnp issues yet.
448 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
])
449 stat
= ide_read_altstatus(drive
);
451 /* Note: this may clear a pending IRQ!! */
452 stat
= ide_read_status(drive
);
454 if (stat
& BUSY_STAT
)
455 /* drive busy: definitely not interrupting */
458 /* drive ready: *might* be interrupting */
462 EXPORT_SYMBOL(drive_is_ready
);
465 * This routine busy-waits for the drive status to be not "busy".
466 * It then checks the status for all of the "good" bits and none
467 * of the "bad" bits, and if all is okay it returns 0. All other
468 * cases return error -- caller may then invoke ide_error().
470 * This routine should get fixed to not hog the cpu during extra long waits..
471 * That could be done by busy-waiting for the first jiffy or two, and then
472 * setting a timer to wake up at half second intervals thereafter,
473 * until timeout is achieved, before timing out.
475 static int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
, u8
*rstat
)
481 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
482 stat
= ide_read_status(drive
);
484 if (stat
& BUSY_STAT
) {
485 local_irq_set(flags
);
487 while ((stat
= ide_read_status(drive
)) & BUSY_STAT
) {
488 if (time_after(jiffies
, timeout
)) {
490 * One last read after the timeout in case
491 * heavy interrupt load made us not make any
492 * progress during the timeout..
494 stat
= ide_read_status(drive
);
495 if (!(stat
& BUSY_STAT
))
498 local_irq_restore(flags
);
503 local_irq_restore(flags
);
506 * Allow status to settle, then read it again.
507 * A few rare drives vastly violate the 400ns spec here,
508 * so we'll wait up to 10usec for a "good" status
509 * rather than expensively fail things immediately.
510 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
512 for (i
= 0; i
< 10; i
++) {
514 stat
= ide_read_status(drive
);
516 if (OK_STAT(stat
, good
, bad
)) {
526 * In case of error returns error value after doing "*startstop = ide_error()".
527 * The caller should return the updated value of "startstop" in this case,
528 * "startstop" is unchanged when the function returns 0.
530 int ide_wait_stat(ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
)
535 /* bail early if we've exceeded max_failures */
536 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
537 *startstop
= ide_stopped
;
541 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
544 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
545 *startstop
= ide_error(drive
, s
, stat
);
551 EXPORT_SYMBOL(ide_wait_stat
);
554 * ide_in_drive_list - look for drive in black/white list
555 * @id: drive identifier
556 * @drive_table: list to inspect
558 * Look for a drive in the blacklist and the whitelist tables
559 * Returns 1 if the drive is found in the table.
562 int ide_in_drive_list(struct hd_driveid
*id
, const struct drive_list_entry
*drive_table
)
564 for ( ; drive_table
->id_model
; drive_table
++)
565 if ((!strcmp(drive_table
->id_model
, id
->model
)) &&
566 (!drive_table
->id_firmware
||
567 strstr(id
->fw_rev
, drive_table
->id_firmware
)))
572 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
575 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
576 * We list them here and depend on the device side cable detection for them.
578 * Some optical devices with the buggy firmwares have the same problem.
580 static const struct drive_list_entry ivb_list
[] = {
581 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
582 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
583 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
584 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
585 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
590 * All hosts that use the 80c ribbon must use!
591 * The name is derived from upper byte of word 93 and the 80c ribbon.
593 u8
eighty_ninty_three (ide_drive_t
*drive
)
595 ide_hwif_t
*hwif
= drive
->hwif
;
596 struct hd_driveid
*id
= drive
->id
;
597 int ivb
= ide_in_drive_list(id
, ivb_list
);
599 if (hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
603 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
606 if (ide_dev_is_sata(id
) && !ivb
)
609 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
614 * - change master/slave IDENTIFY order
615 * - force bit13 (80c cable present) check also for !ivb devices
616 * (unless the slave device is pre-ATA3)
618 if ((id
->hw_config
& 0x4000) || (ivb
&& (id
->hw_config
& 0x2000)))
622 if (drive
->udma33_warned
== 1)
625 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
626 "limiting max speed to UDMA33\n",
628 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
630 drive
->udma33_warned
= 1;
635 int ide_driveid_update(ide_drive_t
*drive
)
637 ide_hwif_t
*hwif
= drive
->hwif
;
638 struct hd_driveid
*id
;
639 unsigned long timeout
, flags
;
643 * Re-read drive->id for possible DMA mode
644 * change (copied from ide-probe.c)
647 SELECT_MASK(drive
, 1);
648 ide_set_irq(drive
, 1);
650 hwif
->OUTB(WIN_IDENTIFY
, hwif
->io_ports
[IDE_COMMAND_OFFSET
]);
651 timeout
= jiffies
+ WAIT_WORSTCASE
;
653 if (time_after(jiffies
, timeout
)) {
654 SELECT_MASK(drive
, 0);
655 return 0; /* drive timed-out */
658 msleep(50); /* give drive a breather */
659 stat
= ide_read_altstatus(drive
);
660 } while (stat
& BUSY_STAT
);
662 msleep(50); /* wait for IRQ and DRQ_STAT */
663 stat
= ide_read_status(drive
);
665 if (!OK_STAT(stat
, DRQ_STAT
, BAD_R_STAT
)) {
666 SELECT_MASK(drive
, 0);
667 printk("%s: CHECK for good STATUS\n", drive
->name
);
670 local_irq_save(flags
);
671 SELECT_MASK(drive
, 0);
672 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
674 local_irq_restore(flags
);
677 hwif
->ata_input_data(drive
, id
, SECTOR_WORDS
);
678 (void)ide_read_status(drive
); /* clear drive IRQ */
680 local_irq_restore(flags
);
683 drive
->id
->dma_ultra
= id
->dma_ultra
;
684 drive
->id
->dma_mword
= id
->dma_mword
;
685 drive
->id
->dma_1word
= id
->dma_1word
;
686 /* anything more ? */
689 if (drive
->using_dma
&& ide_id_dma_bug(drive
))
696 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
698 ide_hwif_t
*hwif
= drive
->hwif
;
702 // while (HWGROUP(drive)->busy)
705 #ifdef CONFIG_BLK_DEV_IDEDMA
706 if (hwif
->dma_ops
) /* check if host supports DMA */
707 hwif
->dma_ops
->dma_host_set(drive
, 0);
710 /* Skip setting PIO flow-control modes on pre-EIDE drives */
711 if ((speed
& 0xf8) == XFER_PIO_0
&& !(drive
->id
->capability
& 0x08))
715 * Don't use ide_wait_cmd here - it will
716 * attempt to set_geometry and recalibrate,
717 * but for some reason these don't work at
718 * this point (lost interrupt).
721 * Select the drive, and issue the SETFEATURES command
723 disable_irq_nosync(hwif
->irq
);
726 * FIXME: we race against the running IRQ here if
727 * this is called from non IRQ context. If we use
728 * disable_irq() we hang on the error path. Work
734 SELECT_MASK(drive
, 0);
736 ide_set_irq(drive
, 0);
737 hwif
->OUTB(speed
, hwif
->io_ports
[IDE_NSECTOR_OFFSET
]);
738 hwif
->OUTB(SETFEATURES_XFER
, hwif
->io_ports
[IDE_FEATURE_OFFSET
]);
739 hwif
->OUTBSYNC(drive
, WIN_SETFEATURES
,
740 hwif
->io_ports
[IDE_COMMAND_OFFSET
]);
741 if (drive
->quirk_list
== 2)
742 ide_set_irq(drive
, 1);
744 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
745 BUSY_STAT
|DRQ_STAT
|ERR_STAT
,
748 SELECT_MASK(drive
, 0);
750 enable_irq(hwif
->irq
);
753 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
757 drive
->id
->dma_ultra
&= ~0xFF00;
758 drive
->id
->dma_mword
&= ~0x0F00;
759 drive
->id
->dma_1word
&= ~0x0F00;
762 #ifdef CONFIG_BLK_DEV_IDEDMA
763 if ((speed
>= XFER_SW_DMA_0
|| (hwif
->host_flags
& IDE_HFLAG_VDMA
)) &&
765 hwif
->dma_ops
->dma_host_set(drive
, 1);
766 else if (hwif
->dma_ops
) /* check if host supports DMA */
767 ide_dma_off_quietly(drive
);
771 case XFER_UDMA_7
: drive
->id
->dma_ultra
|= 0x8080; break;
772 case XFER_UDMA_6
: drive
->id
->dma_ultra
|= 0x4040; break;
773 case XFER_UDMA_5
: drive
->id
->dma_ultra
|= 0x2020; break;
774 case XFER_UDMA_4
: drive
->id
->dma_ultra
|= 0x1010; break;
775 case XFER_UDMA_3
: drive
->id
->dma_ultra
|= 0x0808; break;
776 case XFER_UDMA_2
: drive
->id
->dma_ultra
|= 0x0404; break;
777 case XFER_UDMA_1
: drive
->id
->dma_ultra
|= 0x0202; break;
778 case XFER_UDMA_0
: drive
->id
->dma_ultra
|= 0x0101; break;
779 case XFER_MW_DMA_2
: drive
->id
->dma_mword
|= 0x0404; break;
780 case XFER_MW_DMA_1
: drive
->id
->dma_mword
|= 0x0202; break;
781 case XFER_MW_DMA_0
: drive
->id
->dma_mword
|= 0x0101; break;
782 case XFER_SW_DMA_2
: drive
->id
->dma_1word
|= 0x0404; break;
783 case XFER_SW_DMA_1
: drive
->id
->dma_1word
|= 0x0202; break;
784 case XFER_SW_DMA_0
: drive
->id
->dma_1word
|= 0x0101; break;
787 if (!drive
->init_speed
)
788 drive
->init_speed
= speed
;
789 drive
->current_speed
= speed
;
794 * This should get invoked any time we exit the driver to
795 * wait for an interrupt response from a drive. handler() points
796 * at the appropriate code to handle the next interrupt, and a
797 * timer is started to prevent us from waiting forever in case
798 * something goes wrong (see the ide_timer_expiry() handler later on).
800 * See also ide_execute_command
802 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
803 unsigned int timeout
, ide_expiry_t
*expiry
)
805 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
807 BUG_ON(hwgroup
->handler
);
808 hwgroup
->handler
= handler
;
809 hwgroup
->expiry
= expiry
;
810 hwgroup
->timer
.expires
= jiffies
+ timeout
;
811 hwgroup
->req_gen_timer
= hwgroup
->req_gen
;
812 add_timer(&hwgroup
->timer
);
815 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
816 unsigned int timeout
, ide_expiry_t
*expiry
)
819 spin_lock_irqsave(&ide_lock
, flags
);
820 __ide_set_handler(drive
, handler
, timeout
, expiry
);
821 spin_unlock_irqrestore(&ide_lock
, flags
);
824 EXPORT_SYMBOL(ide_set_handler
);
827 * ide_execute_command - execute an IDE command
828 * @drive: IDE drive to issue the command against
829 * @command: command byte to write
830 * @handler: handler for next phase
831 * @timeout: timeout for command
832 * @expiry: handler to run on timeout
834 * Helper function to issue an IDE command. This handles the
835 * atomicity requirements, command timing and ensures that the
836 * handler and IRQ setup do not race. All IDE command kick off
837 * should go via this function or do equivalent locking.
840 void ide_execute_command(ide_drive_t
*drive
, u8 cmd
, ide_handler_t
*handler
,
841 unsigned timeout
, ide_expiry_t
*expiry
)
844 ide_hwif_t
*hwif
= HWIF(drive
);
846 spin_lock_irqsave(&ide_lock
, flags
);
847 __ide_set_handler(drive
, handler
, timeout
, expiry
);
848 hwif
->OUTBSYNC(drive
, cmd
, hwif
->io_ports
[IDE_COMMAND_OFFSET
]);
850 * Drive takes 400nS to respond, we must avoid the IRQ being
851 * serviced before that.
853 * FIXME: we could skip this delay with care on non shared devices
856 spin_unlock_irqrestore(&ide_lock
, flags
);
859 EXPORT_SYMBOL(ide_execute_command
);
863 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
866 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
867 * during an atapi drive reset operation. If the drive has not yet responded,
868 * and we have not yet hit our maximum waiting time, then the timer is restarted
871 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
873 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
878 stat
= ide_read_status(drive
);
880 if (OK_STAT(stat
, 0, BUSY_STAT
))
881 printk("%s: ATAPI reset complete\n", drive
->name
);
883 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
884 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
885 /* continue polling */
889 hwgroup
->polling
= 0;
890 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
892 /* do it the old fashioned way */
893 return do_reset1(drive
, 1);
896 hwgroup
->polling
= 0;
897 hwgroup
->resetting
= 0;
902 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
903 * during an ide reset operation. If the drives have not yet responded,
904 * and we have not yet hit our maximum waiting time, then the timer is restarted
907 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
909 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
910 ide_hwif_t
*hwif
= HWIF(drive
);
911 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
914 if (port_ops
&& port_ops
->reset_poll
) {
915 if (port_ops
->reset_poll(drive
)) {
916 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
917 hwif
->name
, drive
->name
);
922 tmp
= ide_read_status(drive
);
924 if (!OK_STAT(tmp
, 0, BUSY_STAT
)) {
925 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
926 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
927 /* continue polling */
930 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
933 printk("%s: reset: ", hwif
->name
);
934 tmp
= ide_read_error(drive
);
942 switch (tmp
& 0x7f) {
943 case 1: printk("passed");
945 case 2: printk("formatter device error");
947 case 3: printk("sector buffer error");
949 case 4: printk("ECC circuitry error");
951 case 5: printk("controlling MPU error");
953 default:printk("error (0x%02x?)", tmp
);
956 printk("; slave: failed");
960 hwgroup
->polling
= 0; /* done polling */
961 hwgroup
->resetting
= 0; /* done reset attempt */
965 static void ide_disk_pre_reset(ide_drive_t
*drive
)
967 int legacy
= (drive
->id
->cfs_enable_2
& 0x0400) ? 0 : 1;
969 drive
->special
.all
= 0;
970 drive
->special
.b
.set_geometry
= legacy
;
971 drive
->special
.b
.recalibrate
= legacy
;
972 drive
->mult_count
= 0;
973 if (!drive
->keep_settings
&& !drive
->using_dma
)
975 if (drive
->mult_req
!= drive
->mult_count
)
976 drive
->special
.b
.set_multmode
= 1;
979 static void pre_reset(ide_drive_t
*drive
)
981 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
983 if (drive
->media
== ide_disk
)
984 ide_disk_pre_reset(drive
);
986 drive
->post_reset
= 1;
988 if (drive
->using_dma
) {
989 if (drive
->crc_count
)
990 ide_check_dma_crc(drive
);
995 if (!drive
->keep_settings
) {
996 if (!drive
->using_dma
) {
1003 if (port_ops
&& port_ops
->pre_reset
)
1004 port_ops
->pre_reset(drive
);
1006 if (drive
->current_speed
!= 0xff)
1007 drive
->desired_speed
= drive
->current_speed
;
1008 drive
->current_speed
= 0xff;
1012 * do_reset1() attempts to recover a confused drive by resetting it.
1013 * Unfortunately, resetting a disk drive actually resets all devices on
1014 * the same interface, so it can really be thought of as resetting the
1015 * interface rather than resetting the drive.
1017 * ATAPI devices have their own reset mechanism which allows them to be
1018 * individually reset without clobbering other devices on the same interface.
1020 * Unfortunately, the IDE interface does not generate an interrupt to let
1021 * us know when the reset operation has finished, so we must poll for this.
1022 * Equally poor, though, is the fact that this may a very long time to complete,
1023 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1024 * we set a timer to poll at 50ms intervals.
1026 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
1029 unsigned long flags
;
1031 ide_hwgroup_t
*hwgroup
;
1032 const struct ide_port_ops
*port_ops
;
1035 spin_lock_irqsave(&ide_lock
, flags
);
1037 hwgroup
= HWGROUP(drive
);
1039 /* We must not reset with running handlers */
1040 BUG_ON(hwgroup
->handler
!= NULL
);
1042 /* For an ATAPI device, first try an ATAPI SRST. */
1043 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
1044 hwgroup
->resetting
= 1;
1046 SELECT_DRIVE(drive
);
1048 hwif
->OUTBSYNC(drive
, WIN_SRST
,
1049 hwif
->io_ports
[IDE_COMMAND_OFFSET
]);
1051 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1052 hwgroup
->polling
= 1;
1053 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
1054 spin_unlock_irqrestore(&ide_lock
, flags
);
1059 * First, reset any device state data we were maintaining
1060 * for any of the drives on this interface.
1062 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
1063 pre_reset(&hwif
->drives
[unit
]);
1065 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
] == 0) {
1066 spin_unlock_irqrestore(&ide_lock
, flags
);
1070 hwgroup
->resetting
= 1;
1072 * Note that we also set nIEN while resetting the device,
1073 * to mask unwanted interrupts from the interface during the reset.
1074 * However, due to the design of PC hardware, this will cause an
1075 * immediate interrupt due to the edge transition it produces.
1076 * This single interrupt gives us a "fast poll" for drives that
1077 * recover from reset very quickly, saving us the first 50ms wait time.
1079 /* set SRST and nIEN */
1080 hwif
->OUTBSYNC(drive
, drive
->ctl
|6, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
1081 /* more than enough time */
1083 if (drive
->quirk_list
== 2)
1084 ctl
= drive
->ctl
; /* clear SRST and nIEN */
1086 ctl
= drive
->ctl
| 2; /* clear SRST, leave nIEN */
1087 hwif
->OUTBSYNC(drive
, ctl
, hwif
->io_ports
[IDE_CONTROL_OFFSET
]);
1088 /* more than enough time */
1090 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1091 hwgroup
->polling
= 1;
1092 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1095 * Some weird controller like resetting themselves to a strange
1096 * state when the disks are reset this way. At least, the Winbond
1097 * 553 documentation says that
1099 port_ops
= hwif
->port_ops
;
1100 if (port_ops
&& port_ops
->resetproc
)
1101 port_ops
->resetproc(drive
);
1103 spin_unlock_irqrestore(&ide_lock
, flags
);
1108 * ide_do_reset() is the entry point to the drive/interface reset code.
1111 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
1113 return do_reset1(drive
, 0);
1116 EXPORT_SYMBOL(ide_do_reset
);
1119 * ide_wait_not_busy() waits for the currently selected device on the hwif
1120 * to report a non-busy status, see comments in ide_probe_port().
1122 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
1128 * Turn this into a schedule() sleep once I'm sure
1129 * about locking issues (2.5 work ?).
1132 stat
= hwif
->INB(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1133 if ((stat
& BUSY_STAT
) == 0)
1136 * Assume a value of 0xff means nothing is connected to
1137 * the interface and it doesn't implement the pull-down
1142 touch_softlockup_watchdog();
1143 touch_nmi_watchdog();
1148 EXPORT_SYMBOL_GPL(ide_wait_not_busy
);