2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
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/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
25 #include <asm/byteorder.h>
27 #include <asm/uaccess.h>
31 * Conventional PIO operations for ATA devices
34 static u8
ide_inb (unsigned long port
)
36 return (u8
) inb(port
);
39 static void ide_outb (u8 val
, unsigned long port
)
45 * MMIO operations, typically used for SATA controllers
48 static u8
ide_mm_inb (unsigned long port
)
50 return (u8
) readb((void __iomem
*) port
);
53 static void ide_mm_outb (u8 value
, unsigned long port
)
55 writeb(value
, (void __iomem
*) port
);
58 void SELECT_DRIVE (ide_drive_t
*drive
)
60 ide_hwif_t
*hwif
= drive
->hwif
;
61 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
64 if (port_ops
&& port_ops
->selectproc
)
65 port_ops
->selectproc(drive
);
67 memset(&task
, 0, sizeof(task
));
68 task
.tf_flags
= IDE_TFLAG_OUT_DEVICE
;
70 drive
->hwif
->tp_ops
->tf_load(drive
, &task
);
73 void SELECT_MASK(ide_drive_t
*drive
, int mask
)
75 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
77 if (port_ops
&& port_ops
->maskproc
)
78 port_ops
->maskproc(drive
, mask
);
81 void ide_exec_command(ide_hwif_t
*hwif
, u8 cmd
)
83 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
84 writeb(cmd
, (void __iomem
*)hwif
->io_ports
.command_addr
);
86 outb(cmd
, hwif
->io_ports
.command_addr
);
88 EXPORT_SYMBOL_GPL(ide_exec_command
);
90 u8
ide_read_status(ide_hwif_t
*hwif
)
92 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
93 return readb((void __iomem
*)hwif
->io_ports
.status_addr
);
95 return inb(hwif
->io_ports
.status_addr
);
97 EXPORT_SYMBOL_GPL(ide_read_status
);
99 u8
ide_read_altstatus(ide_hwif_t
*hwif
)
101 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
102 return readb((void __iomem
*)hwif
->io_ports
.ctl_addr
);
104 return inb(hwif
->io_ports
.ctl_addr
);
106 EXPORT_SYMBOL_GPL(ide_read_altstatus
);
108 void ide_set_irq(ide_hwif_t
*hwif
, int on
)
110 u8 ctl
= ATA_DEVCTL_OBS
;
112 if (on
== 4) { /* hack for SRST */
119 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
120 writeb(ctl
, (void __iomem
*)hwif
->io_ports
.ctl_addr
);
122 outb(ctl
, hwif
->io_ports
.ctl_addr
);
124 EXPORT_SYMBOL_GPL(ide_set_irq
);
126 void ide_tf_load(ide_drive_t
*drive
, ide_task_t
*task
)
128 ide_hwif_t
*hwif
= drive
->hwif
;
129 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
130 struct ide_taskfile
*tf
= &task
->tf
;
131 void (*tf_outb
)(u8 addr
, unsigned long port
);
132 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
133 u8 HIHI
= (task
->tf_flags
& IDE_TFLAG_LBA48
) ? 0xE0 : 0xEF;
136 tf_outb
= ide_mm_outb
;
140 if (task
->tf_flags
& IDE_TFLAG_FLAGGED
)
143 if (task
->tf_flags
& IDE_TFLAG_OUT_DATA
) {
144 u16 data
= (tf
->hob_data
<< 8) | tf
->data
;
147 writew(data
, (void __iomem
*)io_ports
->data_addr
);
149 outw(data
, io_ports
->data_addr
);
152 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_FEATURE
)
153 tf_outb(tf
->hob_feature
, io_ports
->feature_addr
);
154 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_NSECT
)
155 tf_outb(tf
->hob_nsect
, io_ports
->nsect_addr
);
156 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAL
)
157 tf_outb(tf
->hob_lbal
, io_ports
->lbal_addr
);
158 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAM
)
159 tf_outb(tf
->hob_lbam
, io_ports
->lbam_addr
);
160 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAH
)
161 tf_outb(tf
->hob_lbah
, io_ports
->lbah_addr
);
163 if (task
->tf_flags
& IDE_TFLAG_OUT_FEATURE
)
164 tf_outb(tf
->feature
, io_ports
->feature_addr
);
165 if (task
->tf_flags
& IDE_TFLAG_OUT_NSECT
)
166 tf_outb(tf
->nsect
, io_ports
->nsect_addr
);
167 if (task
->tf_flags
& IDE_TFLAG_OUT_LBAL
)
168 tf_outb(tf
->lbal
, io_ports
->lbal_addr
);
169 if (task
->tf_flags
& IDE_TFLAG_OUT_LBAM
)
170 tf_outb(tf
->lbam
, io_ports
->lbam_addr
);
171 if (task
->tf_flags
& IDE_TFLAG_OUT_LBAH
)
172 tf_outb(tf
->lbah
, io_ports
->lbah_addr
);
174 if (task
->tf_flags
& IDE_TFLAG_OUT_DEVICE
)
175 tf_outb((tf
->device
& HIHI
) | drive
->select
,
176 io_ports
->device_addr
);
178 EXPORT_SYMBOL_GPL(ide_tf_load
);
180 void ide_tf_read(ide_drive_t
*drive
, ide_task_t
*task
)
182 ide_hwif_t
*hwif
= drive
->hwif
;
183 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
184 struct ide_taskfile
*tf
= &task
->tf
;
185 void (*tf_outb
)(u8 addr
, unsigned long port
);
186 u8 (*tf_inb
)(unsigned long port
);
187 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
190 tf_outb
= ide_mm_outb
;
197 if (task
->tf_flags
& IDE_TFLAG_IN_DATA
) {
201 data
= readw((void __iomem
*)io_ports
->data_addr
);
203 data
= inw(io_ports
->data_addr
);
205 tf
->data
= data
& 0xff;
206 tf
->hob_data
= (data
>> 8) & 0xff;
209 /* be sure we're looking at the low order bits */
210 tf_outb(ATA_DEVCTL_OBS
& ~0x80, io_ports
->ctl_addr
);
212 if (task
->tf_flags
& IDE_TFLAG_IN_FEATURE
)
213 tf
->feature
= tf_inb(io_ports
->feature_addr
);
214 if (task
->tf_flags
& IDE_TFLAG_IN_NSECT
)
215 tf
->nsect
= tf_inb(io_ports
->nsect_addr
);
216 if (task
->tf_flags
& IDE_TFLAG_IN_LBAL
)
217 tf
->lbal
= tf_inb(io_ports
->lbal_addr
);
218 if (task
->tf_flags
& IDE_TFLAG_IN_LBAM
)
219 tf
->lbam
= tf_inb(io_ports
->lbam_addr
);
220 if (task
->tf_flags
& IDE_TFLAG_IN_LBAH
)
221 tf
->lbah
= tf_inb(io_ports
->lbah_addr
);
222 if (task
->tf_flags
& IDE_TFLAG_IN_DEVICE
)
223 tf
->device
= tf_inb(io_ports
->device_addr
);
225 if (task
->tf_flags
& IDE_TFLAG_LBA48
) {
226 tf_outb(ATA_DEVCTL_OBS
| 0x80, io_ports
->ctl_addr
);
228 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_FEATURE
)
229 tf
->hob_feature
= tf_inb(io_ports
->feature_addr
);
230 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_NSECT
)
231 tf
->hob_nsect
= tf_inb(io_ports
->nsect_addr
);
232 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_LBAL
)
233 tf
->hob_lbal
= tf_inb(io_ports
->lbal_addr
);
234 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_LBAM
)
235 tf
->hob_lbam
= tf_inb(io_ports
->lbam_addr
);
236 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_LBAH
)
237 tf
->hob_lbah
= tf_inb(io_ports
->lbah_addr
);
240 EXPORT_SYMBOL_GPL(ide_tf_read
);
243 * Some localbus EIDE interfaces require a special access sequence
244 * when using 32-bit I/O instructions to transfer data. We call this
245 * the "vlb_sync" sequence, which consists of three successive reads
246 * of the sector count register location, with interrupts disabled
247 * to ensure that the reads all happen together.
249 static void ata_vlb_sync(unsigned long port
)
257 * This is used for most PIO data transfers *from* the IDE interface
259 * These routines will round up any request for an odd number of bytes,
260 * so if an odd len is specified, be sure that there's at least one
261 * extra byte allocated for the buffer.
263 void ide_input_data(ide_drive_t
*drive
, struct request
*rq
, void *buf
,
266 ide_hwif_t
*hwif
= drive
->hwif
;
267 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
268 unsigned long data_addr
= io_ports
->data_addr
;
269 u8 io_32bit
= drive
->io_32bit
;
270 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
275 unsigned long uninitialized_var(flags
);
277 if ((io_32bit
& 2) && !mmio
) {
278 local_irq_save(flags
);
279 ata_vlb_sync(io_ports
->nsect_addr
);
283 __ide_mm_insl((void __iomem
*)data_addr
, buf
, len
/ 4);
285 insl(data_addr
, buf
, len
/ 4);
287 if ((io_32bit
& 2) && !mmio
)
288 local_irq_restore(flags
);
290 if ((len
& 3) >= 2) {
292 __ide_mm_insw((void __iomem
*)data_addr
,
293 (u8
*)buf
+ (len
& ~3), 1);
295 insw(data_addr
, (u8
*)buf
+ (len
& ~3), 1);
299 __ide_mm_insw((void __iomem
*)data_addr
, buf
, len
/ 2);
301 insw(data_addr
, buf
, len
/ 2);
304 EXPORT_SYMBOL_GPL(ide_input_data
);
307 * This is used for most PIO data transfers *to* the IDE interface
309 void ide_output_data(ide_drive_t
*drive
, struct request
*rq
, void *buf
,
312 ide_hwif_t
*hwif
= drive
->hwif
;
313 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
314 unsigned long data_addr
= io_ports
->data_addr
;
315 u8 io_32bit
= drive
->io_32bit
;
316 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
321 unsigned long uninitialized_var(flags
);
323 if ((io_32bit
& 2) && !mmio
) {
324 local_irq_save(flags
);
325 ata_vlb_sync(io_ports
->nsect_addr
);
329 __ide_mm_outsl((void __iomem
*)data_addr
, buf
, len
/ 4);
331 outsl(data_addr
, buf
, len
/ 4);
333 if ((io_32bit
& 2) && !mmio
)
334 local_irq_restore(flags
);
336 if ((len
& 3) >= 2) {
338 __ide_mm_outsw((void __iomem
*)data_addr
,
339 (u8
*)buf
+ (len
& ~3), 1);
341 outsw(data_addr
, (u8
*)buf
+ (len
& ~3), 1);
345 __ide_mm_outsw((void __iomem
*)data_addr
, buf
, len
/ 2);
347 outsw(data_addr
, buf
, len
/ 2);
350 EXPORT_SYMBOL_GPL(ide_output_data
);
352 u8
ide_read_error(ide_drive_t
*drive
)
356 memset(&task
, 0, sizeof(task
));
357 task
.tf_flags
= IDE_TFLAG_IN_FEATURE
;
359 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
361 return task
.tf
.error
;
363 EXPORT_SYMBOL_GPL(ide_read_error
);
365 void ide_read_bcount_and_ireason(ide_drive_t
*drive
, u16
*bcount
, u8
*ireason
)
369 memset(&task
, 0, sizeof(task
));
370 task
.tf_flags
= IDE_TFLAG_IN_LBAH
| IDE_TFLAG_IN_LBAM
|
373 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
375 *bcount
= (task
.tf
.lbah
<< 8) | task
.tf
.lbam
;
376 *ireason
= task
.tf
.nsect
& 3;
378 EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason
);
380 const struct ide_tp_ops default_tp_ops
= {
381 .exec_command
= ide_exec_command
,
382 .read_status
= ide_read_status
,
383 .read_altstatus
= ide_read_altstatus
,
385 .set_irq
= ide_set_irq
,
387 .tf_load
= ide_tf_load
,
388 .tf_read
= ide_tf_read
,
390 .input_data
= ide_input_data
,
391 .output_data
= ide_output_data
,
394 void ide_fix_driveid(u16
*id
)
396 #ifndef __LITTLE_ENDIAN
400 for (i
= 0; i
< 256; i
++)
401 id
[i
] = __le16_to_cpu(id
[i
]);
403 # error "Please fix <asm/byteorder.h>"
409 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
410 * removing leading/trailing blanks and compressing internal blanks.
411 * It is primarily used to tidy up the model name/number fields as
412 * returned by the ATA_CMD_ID_ATA[PI] commands.
415 void ide_fixstring (u8
*s
, const int bytecount
, const int byteswap
)
417 u8
*p
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
420 /* convert from big-endian to host byte order */
421 for (p
= s
; p
!= end
; p
+= 2)
422 be16_to_cpus((u16
*) p
);
425 /* strip leading blanks */
427 while (s
!= end
&& *s
== ' ')
429 /* compress internal blanks and strip trailing blanks */
430 while (s
!= end
&& *s
) {
431 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
434 /* wipe out trailing garbage */
439 EXPORT_SYMBOL(ide_fixstring
);
442 * Needed for PCI irq sharing
444 int drive_is_ready (ide_drive_t
*drive
)
446 ide_hwif_t
*hwif
= drive
->hwif
;
449 if (drive
->waiting_for_dma
)
450 return hwif
->dma_ops
->dma_test_irq(drive
);
453 * We do a passive status test under shared PCI interrupts on
454 * cards that truly share the ATA side interrupt, but may also share
455 * an interrupt with another pci card/device. We make no assumptions
456 * about possible isa-pnp and pci-pnp issues yet.
458 if (hwif
->io_ports
.ctl_addr
&&
459 (hwif
->host_flags
& IDE_HFLAG_BROKEN_ALTSTATUS
) == 0)
460 stat
= hwif
->tp_ops
->read_altstatus(hwif
);
462 /* Note: this may clear a pending IRQ!! */
463 stat
= hwif
->tp_ops
->read_status(hwif
);
466 /* drive busy: definitely not interrupting */
469 /* drive ready: *might* be interrupting */
473 EXPORT_SYMBOL(drive_is_ready
);
476 * This routine busy-waits for the drive status to be not "busy".
477 * It then checks the status for all of the "good" bits and none
478 * of the "bad" bits, and if all is okay it returns 0. All other
479 * cases return error -- caller may then invoke ide_error().
481 * This routine should get fixed to not hog the cpu during extra long waits..
482 * That could be done by busy-waiting for the first jiffy or two, and then
483 * setting a timer to wake up at half second intervals thereafter,
484 * until timeout is achieved, before timing out.
486 static int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
, u8
*rstat
)
488 ide_hwif_t
*hwif
= drive
->hwif
;
489 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
494 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
495 stat
= tp_ops
->read_status(hwif
);
497 if (stat
& ATA_BUSY
) {
498 local_save_flags(flags
);
499 local_irq_enable_in_hardirq();
501 while ((stat
= tp_ops
->read_status(hwif
)) & ATA_BUSY
) {
502 if (time_after(jiffies
, timeout
)) {
504 * One last read after the timeout in case
505 * heavy interrupt load made us not make any
506 * progress during the timeout..
508 stat
= tp_ops
->read_status(hwif
);
509 if ((stat
& ATA_BUSY
) == 0)
512 local_irq_restore(flags
);
517 local_irq_restore(flags
);
520 * Allow status to settle, then read it again.
521 * A few rare drives vastly violate the 400ns spec here,
522 * so we'll wait up to 10usec for a "good" status
523 * rather than expensively fail things immediately.
524 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
526 for (i
= 0; i
< 10; i
++) {
528 stat
= tp_ops
->read_status(hwif
);
530 if (OK_STAT(stat
, good
, bad
)) {
540 * In case of error returns error value after doing "*startstop = ide_error()".
541 * The caller should return the updated value of "startstop" in this case,
542 * "startstop" is unchanged when the function returns 0.
544 int ide_wait_stat(ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
)
549 /* bail early if we've exceeded max_failures */
550 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
551 *startstop
= ide_stopped
;
555 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
558 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
559 *startstop
= ide_error(drive
, s
, stat
);
565 EXPORT_SYMBOL(ide_wait_stat
);
568 * ide_in_drive_list - look for drive in black/white list
569 * @id: drive identifier
570 * @table: list to inspect
572 * Look for a drive in the blacklist and the whitelist tables
573 * Returns 1 if the drive is found in the table.
576 int ide_in_drive_list(u16
*id
, const struct drive_list_entry
*table
)
578 for ( ; table
->id_model
; table
++)
579 if ((!strcmp(table
->id_model
, (char *)&id
[ATA_ID_PROD
])) &&
580 (!table
->id_firmware
||
581 strstr((char *)&id
[ATA_ID_FW_REV
], table
->id_firmware
)))
586 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
589 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
590 * We list them here and depend on the device side cable detection for them.
592 * Some optical devices with the buggy firmwares have the same problem.
594 static const struct drive_list_entry ivb_list
[] = {
595 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
596 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
597 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
598 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
599 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
600 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
601 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
602 { "SAMSUNG SP0822N" , "WA100-10" },
607 * All hosts that use the 80c ribbon must use!
608 * The name is derived from upper byte of word 93 and the 80c ribbon.
610 u8
eighty_ninty_three (ide_drive_t
*drive
)
612 ide_hwif_t
*hwif
= drive
->hwif
;
614 int ivb
= ide_in_drive_list(id
, ivb_list
);
616 if (hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
620 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
623 if (ata_id_is_sata(id
) && !ivb
)
626 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
631 * - change master/slave IDENTIFY order
632 * - force bit13 (80c cable present) check also for !ivb devices
633 * (unless the slave device is pre-ATA3)
635 if ((id
[ATA_ID_HW_CONFIG
] & 0x4000) ||
636 (ivb
&& (id
[ATA_ID_HW_CONFIG
] & 0x2000)))
640 if (drive
->dev_flags
& IDE_DFLAG_UDMA33_WARNED
)
643 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
644 "limiting max speed to UDMA33\n",
646 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
648 drive
->dev_flags
|= IDE_DFLAG_UDMA33_WARNED
;
653 int ide_driveid_update(ide_drive_t
*drive
)
655 ide_hwif_t
*hwif
= drive
->hwif
;
656 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
662 * Re-read drive->id for possible DMA mode
663 * change (copied from ide-probe.c)
666 SELECT_MASK(drive
, 1);
667 tp_ops
->set_irq(hwif
, 0);
669 tp_ops
->exec_command(hwif
, ATA_CMD_ID_ATA
);
671 if (ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 1)) {
672 SELECT_MASK(drive
, 0);
676 msleep(50); /* wait for IRQ and ATA_DRQ */
677 stat
= tp_ops
->read_status(hwif
);
679 if (!OK_STAT(stat
, ATA_DRQ
, BAD_R_STAT
)) {
680 SELECT_MASK(drive
, 0);
681 printk("%s: CHECK for good STATUS\n", drive
->name
);
684 local_irq_save(flags
);
685 SELECT_MASK(drive
, 0);
686 id
= kmalloc(SECTOR_SIZE
, GFP_ATOMIC
);
688 local_irq_restore(flags
);
691 tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
692 (void)tp_ops
->read_status(hwif
); /* clear drive IRQ */
694 local_irq_restore(flags
);
697 drive
->id
[ATA_ID_UDMA_MODES
] = id
[ATA_ID_UDMA_MODES
];
698 drive
->id
[ATA_ID_MWDMA_MODES
] = id
[ATA_ID_MWDMA_MODES
];
699 drive
->id
[ATA_ID_SWDMA_MODES
] = id
[ATA_ID_SWDMA_MODES
];
700 /* anything more ? */
704 if ((drive
->dev_flags
& IDE_DFLAG_USING_DMA
) && ide_id_dma_bug(drive
))
710 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
712 ide_hwif_t
*hwif
= drive
->hwif
;
713 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
714 u16
*id
= drive
->id
, i
;
719 #ifdef CONFIG_BLK_DEV_IDEDMA
720 if (hwif
->dma_ops
) /* check if host supports DMA */
721 hwif
->dma_ops
->dma_host_set(drive
, 0);
724 /* Skip setting PIO flow-control modes on pre-EIDE drives */
725 if ((speed
& 0xf8) == XFER_PIO_0
&& ata_id_has_iordy(drive
->id
) == 0)
729 * Don't use ide_wait_cmd here - it will
730 * attempt to set_geometry and recalibrate,
731 * but for some reason these don't work at
732 * this point (lost interrupt).
735 * Select the drive, and issue the SETFEATURES command
737 disable_irq_nosync(hwif
->irq
);
740 * FIXME: we race against the running IRQ here if
741 * this is called from non IRQ context. If we use
742 * disable_irq() we hang on the error path. Work
748 SELECT_MASK(drive
, 1);
750 tp_ops
->set_irq(hwif
, 0);
752 memset(&task
, 0, sizeof(task
));
753 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
| IDE_TFLAG_OUT_NSECT
;
754 task
.tf
.feature
= SETFEATURES_XFER
;
755 task
.tf
.nsect
= speed
;
757 tp_ops
->tf_load(drive
, &task
);
759 tp_ops
->exec_command(hwif
, ATA_CMD_SET_FEATURES
);
761 if (drive
->quirk_list
== 2)
762 tp_ops
->set_irq(hwif
, 1);
764 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
765 ATA_BUSY
| ATA_DRQ
| ATA_ERR
,
768 SELECT_MASK(drive
, 0);
770 enable_irq(hwif
->irq
);
773 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
777 id
[ATA_ID_UDMA_MODES
] &= ~0xFF00;
778 id
[ATA_ID_MWDMA_MODES
] &= ~0x0F00;
779 id
[ATA_ID_SWDMA_MODES
] &= ~0x0F00;
782 #ifdef CONFIG_BLK_DEV_IDEDMA
783 if (speed
>= XFER_SW_DMA_0
&& (drive
->dev_flags
& IDE_DFLAG_USING_DMA
))
784 hwif
->dma_ops
->dma_host_set(drive
, 1);
785 else if (hwif
->dma_ops
) /* check if host supports DMA */
786 ide_dma_off_quietly(drive
);
789 if (speed
>= XFER_UDMA_0
) {
790 i
= 1 << (speed
- XFER_UDMA_0
);
791 id
[ATA_ID_UDMA_MODES
] |= (i
<< 8 | i
);
792 } else if (speed
>= XFER_MW_DMA_0
) {
793 i
= 1 << (speed
- XFER_MW_DMA_0
);
794 id
[ATA_ID_MWDMA_MODES
] |= (i
<< 8 | i
);
795 } else if (speed
>= XFER_SW_DMA_0
) {
796 i
= 1 << (speed
- XFER_SW_DMA_0
);
797 id
[ATA_ID_SWDMA_MODES
] |= (i
<< 8 | i
);
800 if (!drive
->init_speed
)
801 drive
->init_speed
= speed
;
802 drive
->current_speed
= speed
;
807 * This should get invoked any time we exit the driver to
808 * wait for an interrupt response from a drive. handler() points
809 * at the appropriate code to handle the next interrupt, and a
810 * timer is started to prevent us from waiting forever in case
811 * something goes wrong (see the ide_timer_expiry() handler later on).
813 * See also ide_execute_command
815 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
816 unsigned int timeout
, ide_expiry_t
*expiry
)
818 ide_hwif_t
*hwif
= drive
->hwif
;
820 BUG_ON(hwif
->handler
);
821 hwif
->handler
= handler
;
822 hwif
->expiry
= expiry
;
823 hwif
->timer
.expires
= jiffies
+ timeout
;
824 hwif
->req_gen_timer
= hwif
->req_gen
;
825 add_timer(&hwif
->timer
);
828 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
829 unsigned int timeout
, ide_expiry_t
*expiry
)
831 ide_hwif_t
*hwif
= drive
->hwif
;
834 spin_lock_irqsave(&hwif
->lock
, flags
);
835 __ide_set_handler(drive
, handler
, timeout
, expiry
);
836 spin_unlock_irqrestore(&hwif
->lock
, flags
);
839 EXPORT_SYMBOL(ide_set_handler
);
842 * ide_execute_command - execute an IDE command
843 * @drive: IDE drive to issue the command against
844 * @command: command byte to write
845 * @handler: handler for next phase
846 * @timeout: timeout for command
847 * @expiry: handler to run on timeout
849 * Helper function to issue an IDE command. This handles the
850 * atomicity requirements, command timing and ensures that the
851 * handler and IRQ setup do not race. All IDE command kick off
852 * should go via this function or do equivalent locking.
855 void ide_execute_command(ide_drive_t
*drive
, u8 cmd
, ide_handler_t
*handler
,
856 unsigned timeout
, ide_expiry_t
*expiry
)
858 ide_hwif_t
*hwif
= drive
->hwif
;
861 spin_lock_irqsave(&hwif
->lock
, flags
);
862 __ide_set_handler(drive
, handler
, timeout
, expiry
);
863 hwif
->tp_ops
->exec_command(hwif
, cmd
);
865 * Drive takes 400nS to respond, we must avoid the IRQ being
866 * serviced before that.
868 * FIXME: we could skip this delay with care on non shared devices
871 spin_unlock_irqrestore(&hwif
->lock
, flags
);
873 EXPORT_SYMBOL(ide_execute_command
);
875 void ide_execute_pkt_cmd(ide_drive_t
*drive
)
877 ide_hwif_t
*hwif
= drive
->hwif
;
880 spin_lock_irqsave(&hwif
->lock
, flags
);
881 hwif
->tp_ops
->exec_command(hwif
, ATA_CMD_PACKET
);
883 spin_unlock_irqrestore(&hwif
->lock
, flags
);
885 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd
);
887 static inline void ide_complete_drive_reset(ide_drive_t
*drive
, int err
)
889 struct request
*rq
= drive
->hwif
->rq
;
891 if (rq
&& blk_special_request(rq
) && rq
->cmd
[0] == REQ_DRIVE_RESET
)
892 ide_end_request(drive
, err
? err
: 1, 0);
896 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
899 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
900 * during an atapi drive reset operation. If the drive has not yet responded,
901 * and we have not yet hit our maximum waiting time, then the timer is restarted
904 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
906 ide_hwif_t
*hwif
= drive
->hwif
;
911 stat
= hwif
->tp_ops
->read_status(hwif
);
913 if (OK_STAT(stat
, 0, ATA_BUSY
))
914 printk("%s: ATAPI reset complete\n", drive
->name
);
916 if (time_before(jiffies
, hwif
->poll_timeout
)) {
917 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
918 /* continue polling */
923 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
925 /* do it the old fashioned way */
926 return do_reset1(drive
, 1);
930 ide_complete_drive_reset(drive
, 0);
934 static void ide_reset_report_error(ide_hwif_t
*hwif
, u8 err
)
936 static const char *err_master_vals
[] =
937 { NULL
, "passed", "formatter device error",
938 "sector buffer error", "ECC circuitry error",
939 "controlling MPU error" };
941 u8 err_master
= err
& 0x7f;
943 printk(KERN_ERR
"%s: reset: master: ", hwif
->name
);
944 if (err_master
&& err_master
< 6)
945 printk(KERN_CONT
"%s", err_master_vals
[err_master
]);
947 printk(KERN_CONT
"error (0x%02x?)", err
);
949 printk(KERN_CONT
"; slave: failed");
950 printk(KERN_CONT
"\n");
954 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
955 * during an ide reset operation. If the drives have not yet responded,
956 * and we have not yet hit our maximum waiting time, then the timer is restarted
959 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
961 ide_hwif_t
*hwif
= drive
->hwif
;
962 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
966 if (port_ops
&& port_ops
->reset_poll
) {
967 err
= port_ops
->reset_poll(drive
);
969 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
970 hwif
->name
, drive
->name
);
975 tmp
= hwif
->tp_ops
->read_status(hwif
);
977 if (!OK_STAT(tmp
, 0, ATA_BUSY
)) {
978 if (time_before(jiffies
, hwif
->poll_timeout
)) {
979 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
980 /* continue polling */
983 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
987 tmp
= ide_read_error(drive
);
990 printk(KERN_INFO
"%s: reset: success\n", hwif
->name
);
993 ide_reset_report_error(hwif
, tmp
);
999 hwif
->polling
= 0; /* done polling */
1000 ide_complete_drive_reset(drive
, err
);
1004 static void ide_disk_pre_reset(ide_drive_t
*drive
)
1006 int legacy
= (drive
->id
[ATA_ID_CFS_ENABLE_2
] & 0x0400) ? 0 : 1;
1008 drive
->special
.all
= 0;
1009 drive
->special
.b
.set_geometry
= legacy
;
1010 drive
->special
.b
.recalibrate
= legacy
;
1012 drive
->mult_count
= 0;
1013 drive
->dev_flags
&= ~IDE_DFLAG_PARKED
;
1015 if ((drive
->dev_flags
& IDE_DFLAG_KEEP_SETTINGS
) == 0 &&
1016 (drive
->dev_flags
& IDE_DFLAG_USING_DMA
) == 0)
1017 drive
->mult_req
= 0;
1019 if (drive
->mult_req
!= drive
->mult_count
)
1020 drive
->special
.b
.set_multmode
= 1;
1023 static void pre_reset(ide_drive_t
*drive
)
1025 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
1027 if (drive
->media
== ide_disk
)
1028 ide_disk_pre_reset(drive
);
1030 drive
->dev_flags
|= IDE_DFLAG_POST_RESET
;
1032 if (drive
->dev_flags
& IDE_DFLAG_USING_DMA
) {
1033 if (drive
->crc_count
)
1034 ide_check_dma_crc(drive
);
1039 if ((drive
->dev_flags
& IDE_DFLAG_KEEP_SETTINGS
) == 0) {
1040 if ((drive
->dev_flags
& IDE_DFLAG_USING_DMA
) == 0) {
1041 drive
->dev_flags
&= ~IDE_DFLAG_UNMASK
;
1042 drive
->io_32bit
= 0;
1047 if (port_ops
&& port_ops
->pre_reset
)
1048 port_ops
->pre_reset(drive
);
1050 if (drive
->current_speed
!= 0xff)
1051 drive
->desired_speed
= drive
->current_speed
;
1052 drive
->current_speed
= 0xff;
1056 * do_reset1() attempts to recover a confused drive by resetting it.
1057 * Unfortunately, resetting a disk drive actually resets all devices on
1058 * the same interface, so it can really be thought of as resetting the
1059 * interface rather than resetting the drive.
1061 * ATAPI devices have their own reset mechanism which allows them to be
1062 * individually reset without clobbering other devices on the same interface.
1064 * Unfortunately, the IDE interface does not generate an interrupt to let
1065 * us know when the reset operation has finished, so we must poll for this.
1066 * Equally poor, though, is the fact that this may a very long time to complete,
1067 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1068 * we set a timer to poll at 50ms intervals.
1070 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
1072 ide_hwif_t
*hwif
= drive
->hwif
;
1073 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
1074 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
1075 const struct ide_port_ops
*port_ops
;
1076 ide_drive_t
*tdrive
;
1077 unsigned long flags
, timeout
;
1081 spin_lock_irqsave(&hwif
->lock
, flags
);
1083 /* We must not reset with running handlers */
1084 BUG_ON(hwif
->handler
!= NULL
);
1086 /* For an ATAPI device, first try an ATAPI SRST. */
1087 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
1089 SELECT_DRIVE(drive
);
1091 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
1093 hwif
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1095 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
1096 spin_unlock_irqrestore(&hwif
->lock
, flags
);
1100 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
1104 prepare_to_wait(&ide_park_wq
, &wait
, TASK_UNINTERRUPTIBLE
);
1106 ide_port_for_each_dev(i
, tdrive
, hwif
) {
1107 if (tdrive
->dev_flags
& IDE_DFLAG_PRESENT
&&
1108 tdrive
->dev_flags
& IDE_DFLAG_PARKED
&&
1109 time_after(tdrive
->sleep
, timeout
))
1110 timeout
= tdrive
->sleep
;
1114 if (time_before_eq(timeout
, now
))
1117 spin_unlock_irqrestore(&hwif
->lock
, flags
);
1118 timeout
= schedule_timeout_uninterruptible(timeout
- now
);
1119 spin_lock_irqsave(&hwif
->lock
, flags
);
1121 finish_wait(&ide_park_wq
, &wait
);
1124 * First, reset any device state data we were maintaining
1125 * for any of the drives on this interface.
1127 ide_port_for_each_dev(i
, tdrive
, hwif
)
1130 if (io_ports
->ctl_addr
== 0) {
1131 spin_unlock_irqrestore(&hwif
->lock
, flags
);
1132 ide_complete_drive_reset(drive
, -ENXIO
);
1137 * Note that we also set nIEN while resetting the device,
1138 * to mask unwanted interrupts from the interface during the reset.
1139 * However, due to the design of PC hardware, this will cause an
1140 * immediate interrupt due to the edge transition it produces.
1141 * This single interrupt gives us a "fast poll" for drives that
1142 * recover from reset very quickly, saving us the first 50ms wait time.
1144 * TODO: add ->softreset method and stop abusing ->set_irq
1146 /* set SRST and nIEN */
1147 tp_ops
->set_irq(hwif
, 4);
1148 /* more than enough time */
1150 /* clear SRST, leave nIEN (unless device is on the quirk list) */
1151 tp_ops
->set_irq(hwif
, drive
->quirk_list
== 2);
1152 /* more than enough time */
1154 hwif
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1156 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1159 * Some weird controller like resetting themselves to a strange
1160 * state when the disks are reset this way. At least, the Winbond
1161 * 553 documentation says that
1163 port_ops
= hwif
->port_ops
;
1164 if (port_ops
&& port_ops
->resetproc
)
1165 port_ops
->resetproc(drive
);
1167 spin_unlock_irqrestore(&hwif
->lock
, flags
);
1172 * ide_do_reset() is the entry point to the drive/interface reset code.
1175 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
1177 return do_reset1(drive
, 0);
1180 EXPORT_SYMBOL(ide_do_reset
);
1183 * ide_wait_not_busy() waits for the currently selected device on the hwif
1184 * to report a non-busy status, see comments in ide_probe_port().
1186 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
1192 * Turn this into a schedule() sleep once I'm sure
1193 * about locking issues (2.5 work ?).
1196 stat
= hwif
->tp_ops
->read_status(hwif
);
1197 if ((stat
& ATA_BUSY
) == 0)
1200 * Assume a value of 0xff means nothing is connected to
1201 * the interface and it doesn't implement the pull-down
1206 touch_softlockup_watchdog();
1207 touch_nmi_watchdog();