2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat <alan@redhat.com>
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/string.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
13 #include <linux/interrupt.h>
14 #include <linux/major.h>
15 #include <linux/errno.h>
16 #include <linux/genhd.h>
17 #include <linux/blkpg.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/hdreg.h>
22 #include <linux/ide.h>
23 #include <linux/bitops.h>
24 #include <linux/nmi.h>
26 #include <asm/byteorder.h>
28 #include <asm/uaccess.h>
32 * Conventional PIO operations for ATA devices
35 static u8
ide_inb (unsigned long port
)
37 return (u8
) inb(port
);
40 static void ide_outb (u8 val
, unsigned long port
)
46 * MMIO operations, typically used for SATA controllers
49 static u8
ide_mm_inb (unsigned long port
)
51 return (u8
) readb((void __iomem
*) port
);
54 static void ide_mm_outb (u8 value
, unsigned long port
)
56 writeb(value
, (void __iomem
*) port
);
59 void SELECT_DRIVE (ide_drive_t
*drive
)
61 ide_hwif_t
*hwif
= drive
->hwif
;
62 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
65 if (port_ops
&& port_ops
->selectproc
)
66 port_ops
->selectproc(drive
);
68 memset(&task
, 0, sizeof(task
));
69 task
.tf_flags
= IDE_TFLAG_OUT_DEVICE
;
71 drive
->hwif
->tp_ops
->tf_load(drive
, &task
);
74 void SELECT_MASK(ide_drive_t
*drive
, int mask
)
76 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
78 if (port_ops
&& port_ops
->maskproc
)
79 port_ops
->maskproc(drive
, mask
);
82 void ide_exec_command(ide_hwif_t
*hwif
, u8 cmd
)
84 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
85 writeb(cmd
, (void __iomem
*)hwif
->io_ports
.command_addr
);
87 outb(cmd
, hwif
->io_ports
.command_addr
);
89 EXPORT_SYMBOL_GPL(ide_exec_command
);
91 u8
ide_read_status(ide_hwif_t
*hwif
)
93 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
94 return readb((void __iomem
*)hwif
->io_ports
.status_addr
);
96 return inb(hwif
->io_ports
.status_addr
);
98 EXPORT_SYMBOL_GPL(ide_read_status
);
100 u8
ide_read_altstatus(ide_hwif_t
*hwif
)
102 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
103 return readb((void __iomem
*)hwif
->io_ports
.ctl_addr
);
105 return inb(hwif
->io_ports
.ctl_addr
);
107 EXPORT_SYMBOL_GPL(ide_read_altstatus
);
109 u8
ide_read_sff_dma_status(ide_hwif_t
*hwif
)
111 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
112 return readb((void __iomem
*)(hwif
->dma_base
+ ATA_DMA_STATUS
));
114 return inb(hwif
->dma_base
+ ATA_DMA_STATUS
);
116 EXPORT_SYMBOL_GPL(ide_read_sff_dma_status
);
118 void ide_set_irq(ide_hwif_t
*hwif
, int on
)
120 u8 ctl
= ATA_DEVCTL_OBS
;
122 if (on
== 4) { /* hack for SRST */
129 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
130 writeb(ctl
, (void __iomem
*)hwif
->io_ports
.ctl_addr
);
132 outb(ctl
, hwif
->io_ports
.ctl_addr
);
134 EXPORT_SYMBOL_GPL(ide_set_irq
);
136 void ide_tf_load(ide_drive_t
*drive
, ide_task_t
*task
)
138 ide_hwif_t
*hwif
= drive
->hwif
;
139 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
140 struct ide_taskfile
*tf
= &task
->tf
;
141 void (*tf_outb
)(u8 addr
, unsigned long port
);
142 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
143 u8 HIHI
= (task
->tf_flags
& IDE_TFLAG_LBA48
) ? 0xE0 : 0xEF;
146 tf_outb
= ide_mm_outb
;
150 if (task
->tf_flags
& IDE_TFLAG_FLAGGED
)
153 if (task
->tf_flags
& IDE_TFLAG_OUT_DATA
) {
154 u16 data
= (tf
->hob_data
<< 8) | tf
->data
;
157 writew(data
, (void __iomem
*)io_ports
->data_addr
);
159 outw(data
, io_ports
->data_addr
);
162 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_FEATURE
)
163 tf_outb(tf
->hob_feature
, io_ports
->feature_addr
);
164 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_NSECT
)
165 tf_outb(tf
->hob_nsect
, io_ports
->nsect_addr
);
166 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAL
)
167 tf_outb(tf
->hob_lbal
, io_ports
->lbal_addr
);
168 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAM
)
169 tf_outb(tf
->hob_lbam
, io_ports
->lbam_addr
);
170 if (task
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAH
)
171 tf_outb(tf
->hob_lbah
, io_ports
->lbah_addr
);
173 if (task
->tf_flags
& IDE_TFLAG_OUT_FEATURE
)
174 tf_outb(tf
->feature
, io_ports
->feature_addr
);
175 if (task
->tf_flags
& IDE_TFLAG_OUT_NSECT
)
176 tf_outb(tf
->nsect
, io_ports
->nsect_addr
);
177 if (task
->tf_flags
& IDE_TFLAG_OUT_LBAL
)
178 tf_outb(tf
->lbal
, io_ports
->lbal_addr
);
179 if (task
->tf_flags
& IDE_TFLAG_OUT_LBAM
)
180 tf_outb(tf
->lbam
, io_ports
->lbam_addr
);
181 if (task
->tf_flags
& IDE_TFLAG_OUT_LBAH
)
182 tf_outb(tf
->lbah
, io_ports
->lbah_addr
);
184 if (task
->tf_flags
& IDE_TFLAG_OUT_DEVICE
)
185 tf_outb((tf
->device
& HIHI
) | drive
->select
.all
,
186 io_ports
->device_addr
);
188 EXPORT_SYMBOL_GPL(ide_tf_load
);
190 void ide_tf_read(ide_drive_t
*drive
, ide_task_t
*task
)
192 ide_hwif_t
*hwif
= drive
->hwif
;
193 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
194 struct ide_taskfile
*tf
= &task
->tf
;
195 void (*tf_outb
)(u8 addr
, unsigned long port
);
196 u8 (*tf_inb
)(unsigned long port
);
197 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
200 tf_outb
= ide_mm_outb
;
207 if (task
->tf_flags
& IDE_TFLAG_IN_DATA
) {
211 data
= readw((void __iomem
*)io_ports
->data_addr
);
213 data
= inw(io_ports
->data_addr
);
215 tf
->data
= data
& 0xff;
216 tf
->hob_data
= (data
>> 8) & 0xff;
219 /* be sure we're looking at the low order bits */
220 tf_outb(ATA_DEVCTL_OBS
& ~0x80, io_ports
->ctl_addr
);
222 if (task
->tf_flags
& IDE_TFLAG_IN_FEATURE
)
223 tf
->feature
= tf_inb(io_ports
->feature_addr
);
224 if (task
->tf_flags
& IDE_TFLAG_IN_NSECT
)
225 tf
->nsect
= tf_inb(io_ports
->nsect_addr
);
226 if (task
->tf_flags
& IDE_TFLAG_IN_LBAL
)
227 tf
->lbal
= tf_inb(io_ports
->lbal_addr
);
228 if (task
->tf_flags
& IDE_TFLAG_IN_LBAM
)
229 tf
->lbam
= tf_inb(io_ports
->lbam_addr
);
230 if (task
->tf_flags
& IDE_TFLAG_IN_LBAH
)
231 tf
->lbah
= tf_inb(io_ports
->lbah_addr
);
232 if (task
->tf_flags
& IDE_TFLAG_IN_DEVICE
)
233 tf
->device
= tf_inb(io_ports
->device_addr
);
235 if (task
->tf_flags
& IDE_TFLAG_LBA48
) {
236 tf_outb(ATA_DEVCTL_OBS
| 0x80, io_ports
->ctl_addr
);
238 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_FEATURE
)
239 tf
->hob_feature
= tf_inb(io_ports
->feature_addr
);
240 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_NSECT
)
241 tf
->hob_nsect
= tf_inb(io_ports
->nsect_addr
);
242 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_LBAL
)
243 tf
->hob_lbal
= tf_inb(io_ports
->lbal_addr
);
244 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_LBAM
)
245 tf
->hob_lbam
= tf_inb(io_ports
->lbam_addr
);
246 if (task
->tf_flags
& IDE_TFLAG_IN_HOB_LBAH
)
247 tf
->hob_lbah
= tf_inb(io_ports
->lbah_addr
);
250 EXPORT_SYMBOL_GPL(ide_tf_read
);
253 * Some localbus EIDE interfaces require a special access sequence
254 * when using 32-bit I/O instructions to transfer data. We call this
255 * the "vlb_sync" sequence, which consists of three successive reads
256 * of the sector count register location, with interrupts disabled
257 * to ensure that the reads all happen together.
259 static void ata_vlb_sync(unsigned long port
)
267 * This is used for most PIO data transfers *from* the IDE interface
269 * These routines will round up any request for an odd number of bytes,
270 * so if an odd len is specified, be sure that there's at least one
271 * extra byte allocated for the buffer.
273 void ide_input_data(ide_drive_t
*drive
, struct request
*rq
, void *buf
,
276 ide_hwif_t
*hwif
= drive
->hwif
;
277 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
278 unsigned long data_addr
= io_ports
->data_addr
;
279 u8 io_32bit
= drive
->io_32bit
;
280 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
285 unsigned long uninitialized_var(flags
);
287 if ((io_32bit
& 2) && !mmio
) {
288 local_irq_save(flags
);
289 ata_vlb_sync(io_ports
->nsect_addr
);
293 __ide_mm_insl((void __iomem
*)data_addr
, buf
, len
/ 4);
295 insl(data_addr
, buf
, len
/ 4);
297 if ((io_32bit
& 2) && !mmio
)
298 local_irq_restore(flags
);
300 if ((len
& 3) >= 2) {
302 __ide_mm_insw((void __iomem
*)data_addr
,
303 (u8
*)buf
+ (len
& ~3), 1);
305 insw(data_addr
, (u8
*)buf
+ (len
& ~3), 1);
309 __ide_mm_insw((void __iomem
*)data_addr
, buf
, len
/ 2);
311 insw(data_addr
, buf
, len
/ 2);
314 EXPORT_SYMBOL_GPL(ide_input_data
);
317 * This is used for most PIO data transfers *to* the IDE interface
319 void ide_output_data(ide_drive_t
*drive
, struct request
*rq
, void *buf
,
322 ide_hwif_t
*hwif
= drive
->hwif
;
323 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
324 unsigned long data_addr
= io_ports
->data_addr
;
325 u8 io_32bit
= drive
->io_32bit
;
326 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
329 unsigned long uninitialized_var(flags
);
331 if ((io_32bit
& 2) && !mmio
) {
332 local_irq_save(flags
);
333 ata_vlb_sync(io_ports
->nsect_addr
);
337 __ide_mm_outsl((void __iomem
*)data_addr
, buf
, len
/ 4);
339 outsl(data_addr
, buf
, len
/ 4);
341 if ((io_32bit
& 2) && !mmio
)
342 local_irq_restore(flags
);
344 if ((len
& 3) >= 2) {
346 __ide_mm_outsw((void __iomem
*)data_addr
,
347 (u8
*)buf
+ (len
& ~3), 1);
349 outsw(data_addr
, (u8
*)buf
+ (len
& ~3), 1);
353 __ide_mm_outsw((void __iomem
*)data_addr
, buf
, len
/ 2);
355 outsw(data_addr
, buf
, len
/ 2);
358 EXPORT_SYMBOL_GPL(ide_output_data
);
360 u8
ide_read_error(ide_drive_t
*drive
)
364 memset(&task
, 0, sizeof(task
));
365 task
.tf_flags
= IDE_TFLAG_IN_FEATURE
;
367 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
369 return task
.tf
.error
;
371 EXPORT_SYMBOL_GPL(ide_read_error
);
373 void ide_read_bcount_and_ireason(ide_drive_t
*drive
, u16
*bcount
, u8
*ireason
)
377 memset(&task
, 0, sizeof(task
));
378 task
.tf_flags
= IDE_TFLAG_IN_LBAH
| IDE_TFLAG_IN_LBAM
|
381 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
383 *bcount
= (task
.tf
.lbah
<< 8) | task
.tf
.lbam
;
384 *ireason
= task
.tf
.nsect
& 3;
386 EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason
);
388 const struct ide_tp_ops default_tp_ops
= {
389 .exec_command
= ide_exec_command
,
390 .read_status
= ide_read_status
,
391 .read_altstatus
= ide_read_altstatus
,
392 .read_sff_dma_status
= ide_read_sff_dma_status
,
394 .set_irq
= ide_set_irq
,
396 .tf_load
= ide_tf_load
,
397 .tf_read
= ide_tf_read
,
399 .input_data
= ide_input_data
,
400 .output_data
= ide_output_data
,
403 void ide_fix_driveid(u16
*id
)
405 #ifndef __LITTLE_ENDIAN
409 for (i
= 0; i
< 256; i
++)
410 id
[i
] = __le16_to_cpu(id
[i
]);
412 # error "Please fix <asm/byteorder.h>"
418 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
419 * removing leading/trailing blanks and compressing internal blanks.
420 * It is primarily used to tidy up the model name/number fields as
421 * returned by the ATA_CMD_ID_ATA[PI] commands.
424 void ide_fixstring (u8
*s
, const int bytecount
, const int byteswap
)
426 u8
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
429 /* convert from big-endian to host byte order */
430 for (p
= end
; p
!= s
;)
431 be16_to_cpus((u16
*)(p
-= 2));
433 /* strip leading blanks */
434 while (s
!= end
&& *s
== ' ')
436 /* compress internal blanks and strip trailing blanks */
437 while (s
!= end
&& *s
) {
438 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
441 /* wipe out trailing garbage */
446 EXPORT_SYMBOL(ide_fixstring
);
449 * Needed for PCI irq sharing
451 int drive_is_ready (ide_drive_t
*drive
)
453 ide_hwif_t
*hwif
= HWIF(drive
);
456 if (drive
->waiting_for_dma
)
457 return hwif
->dma_ops
->dma_test_irq(drive
);
460 /* need to guarantee 400ns since last command was issued */
465 * We do a passive status test under shared PCI interrupts on
466 * cards that truly share the ATA side interrupt, but may also share
467 * an interrupt with another pci card/device. We make no assumptions
468 * about possible isa-pnp and pci-pnp issues yet.
470 if (hwif
->io_ports
.ctl_addr
)
471 stat
= hwif
->tp_ops
->read_altstatus(hwif
);
473 /* Note: this may clear a pending IRQ!! */
474 stat
= hwif
->tp_ops
->read_status(hwif
);
476 if (stat
& BUSY_STAT
)
477 /* drive busy: definitely not interrupting */
480 /* drive ready: *might* be interrupting */
484 EXPORT_SYMBOL(drive_is_ready
);
487 * This routine busy-waits for the drive status to be not "busy".
488 * It then checks the status for all of the "good" bits and none
489 * of the "bad" bits, and if all is okay it returns 0. All other
490 * cases return error -- caller may then invoke ide_error().
492 * This routine should get fixed to not hog the cpu during extra long waits..
493 * That could be done by busy-waiting for the first jiffy or two, and then
494 * setting a timer to wake up at half second intervals thereafter,
495 * until timeout is achieved, before timing out.
497 static int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
, u8
*rstat
)
499 ide_hwif_t
*hwif
= drive
->hwif
;
500 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
505 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
506 stat
= tp_ops
->read_status(hwif
);
508 if (stat
& BUSY_STAT
) {
509 local_irq_set(flags
);
511 while ((stat
= tp_ops
->read_status(hwif
)) & BUSY_STAT
) {
512 if (time_after(jiffies
, timeout
)) {
514 * One last read after the timeout in case
515 * heavy interrupt load made us not make any
516 * progress during the timeout..
518 stat
= tp_ops
->read_status(hwif
);
519 if (!(stat
& BUSY_STAT
))
522 local_irq_restore(flags
);
527 local_irq_restore(flags
);
530 * Allow status to settle, then read it again.
531 * A few rare drives vastly violate the 400ns spec here,
532 * so we'll wait up to 10usec for a "good" status
533 * rather than expensively fail things immediately.
534 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
536 for (i
= 0; i
< 10; i
++) {
538 stat
= tp_ops
->read_status(hwif
);
540 if (OK_STAT(stat
, good
, bad
)) {
550 * In case of error returns error value after doing "*startstop = ide_error()".
551 * The caller should return the updated value of "startstop" in this case,
552 * "startstop" is unchanged when the function returns 0.
554 int ide_wait_stat(ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
)
559 /* bail early if we've exceeded max_failures */
560 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
561 *startstop
= ide_stopped
;
565 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
568 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
569 *startstop
= ide_error(drive
, s
, stat
);
575 EXPORT_SYMBOL(ide_wait_stat
);
578 * ide_in_drive_list - look for drive in black/white list
579 * @id: drive identifier
580 * @table: list to inspect
582 * Look for a drive in the blacklist and the whitelist tables
583 * Returns 1 if the drive is found in the table.
586 int ide_in_drive_list(u16
*id
, const struct drive_list_entry
*table
)
588 for ( ; table
->id_model
; table
++)
589 if ((!strcmp(table
->id_model
, (char *)&id
[ATA_ID_PROD
])) &&
590 (!table
->id_firmware
||
591 strstr((char *)&id
[ATA_ID_FW_REV
], table
->id_firmware
)))
596 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
599 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
600 * We list them here and depend on the device side cable detection for them.
602 * Some optical devices with the buggy firmwares have the same problem.
604 static const struct drive_list_entry ivb_list
[] = {
605 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
606 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
607 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
608 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
609 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
610 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
611 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
616 * All hosts that use the 80c ribbon must use!
617 * The name is derived from upper byte of word 93 and the 80c ribbon.
619 u8
eighty_ninty_three (ide_drive_t
*drive
)
621 ide_hwif_t
*hwif
= drive
->hwif
;
623 int ivb
= ide_in_drive_list(id
, ivb_list
);
625 if (hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
629 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
632 if (ide_dev_is_sata(id
) && !ivb
)
635 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
640 * - change master/slave IDENTIFY order
641 * - force bit13 (80c cable present) check also for !ivb devices
642 * (unless the slave device is pre-ATA3)
644 if ((id
[ATA_ID_HW_CONFIG
] & 0x4000) ||
645 (ivb
&& (id
[ATA_ID_HW_CONFIG
] & 0x2000)))
649 if (drive
->udma33_warned
== 1)
652 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
653 "limiting max speed to UDMA33\n",
655 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
657 drive
->udma33_warned
= 1;
662 int ide_driveid_update(ide_drive_t
*drive
)
664 ide_hwif_t
*hwif
= drive
->hwif
;
665 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
667 unsigned long timeout
, flags
;
671 * Re-read drive->id for possible DMA mode
672 * change (copied from ide-probe.c)
675 SELECT_MASK(drive
, 1);
676 tp_ops
->set_irq(hwif
, 0);
678 tp_ops
->exec_command(hwif
, ATA_CMD_ID_ATA
);
679 timeout
= jiffies
+ WAIT_WORSTCASE
;
681 if (time_after(jiffies
, timeout
)) {
682 SELECT_MASK(drive
, 0);
683 return 0; /* drive timed-out */
686 msleep(50); /* give drive a breather */
687 stat
= tp_ops
->read_altstatus(hwif
);
688 } while (stat
& BUSY_STAT
);
690 msleep(50); /* wait for IRQ and DRQ_STAT */
691 stat
= tp_ops
->read_status(hwif
);
693 if (!OK_STAT(stat
, DRQ_STAT
, BAD_R_STAT
)) {
694 SELECT_MASK(drive
, 0);
695 printk("%s: CHECK for good STATUS\n", drive
->name
);
698 local_irq_save(flags
);
699 SELECT_MASK(drive
, 0);
700 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
702 local_irq_restore(flags
);
705 tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
706 (void)tp_ops
->read_status(hwif
); /* clear drive IRQ */
708 local_irq_restore(flags
);
711 drive
->id
[ATA_ID_UDMA_MODES
] = id
[ATA_ID_UDMA_MODES
];
712 drive
->id
[ATA_ID_MWDMA_MODES
] = id
[ATA_ID_MWDMA_MODES
];
713 drive
->id
[ATA_ID_SWDMA_MODES
] = id
[ATA_ID_SWDMA_MODES
];
714 /* anything more ? */
718 if (drive
->using_dma
&& ide_id_dma_bug(drive
))
724 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
726 ide_hwif_t
*hwif
= drive
->hwif
;
727 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
728 u16
*id
= drive
->id
, i
;
733 #ifdef CONFIG_BLK_DEV_IDEDMA
734 if (hwif
->dma_ops
) /* check if host supports DMA */
735 hwif
->dma_ops
->dma_host_set(drive
, 0);
738 /* Skip setting PIO flow-control modes on pre-EIDE drives */
739 if ((speed
& 0xf8) == XFER_PIO_0
&& ata_id_has_iordy(drive
->id
) == 0)
743 * Don't use ide_wait_cmd here - it will
744 * attempt to set_geometry and recalibrate,
745 * but for some reason these don't work at
746 * this point (lost interrupt).
749 * Select the drive, and issue the SETFEATURES command
751 disable_irq_nosync(hwif
->irq
);
754 * FIXME: we race against the running IRQ here if
755 * this is called from non IRQ context. If we use
756 * disable_irq() we hang on the error path. Work
762 SELECT_MASK(drive
, 0);
764 tp_ops
->set_irq(hwif
, 0);
766 memset(&task
, 0, sizeof(task
));
767 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
| IDE_TFLAG_OUT_NSECT
;
768 task
.tf
.feature
= SETFEATURES_XFER
;
769 task
.tf
.nsect
= speed
;
771 tp_ops
->tf_load(drive
, &task
);
773 tp_ops
->exec_command(hwif
, ATA_CMD_SET_FEATURES
);
775 if (drive
->quirk_list
== 2)
776 tp_ops
->set_irq(hwif
, 1);
778 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
779 BUSY_STAT
|DRQ_STAT
|ERR_STAT
,
782 SELECT_MASK(drive
, 0);
784 enable_irq(hwif
->irq
);
787 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
791 id
[ATA_ID_UDMA_MODES
] &= ~0xFF00;
792 id
[ATA_ID_MWDMA_MODES
] &= ~0x0F00;
793 id
[ATA_ID_SWDMA_MODES
] &= ~0x0F00;
796 #ifdef CONFIG_BLK_DEV_IDEDMA
797 if (speed
>= XFER_SW_DMA_0
&& drive
->using_dma
)
798 hwif
->dma_ops
->dma_host_set(drive
, 1);
799 else if (hwif
->dma_ops
) /* check if host supports DMA */
800 ide_dma_off_quietly(drive
);
803 if (speed
>= XFER_UDMA_0
) {
804 i
= 1 << (speed
- XFER_UDMA_0
);
805 id
[ATA_ID_UDMA_MODES
] |= (i
<< 8 | i
);
806 } else if (speed
>= XFER_MW_DMA_0
) {
807 i
= 1 << (speed
- XFER_MW_DMA_0
);
808 id
[ATA_ID_MWDMA_MODES
] |= (i
<< 8 | i
);
809 } else if (speed
>= XFER_SW_DMA_0
) {
810 i
= 1 << (speed
- XFER_SW_DMA_0
);
811 id
[ATA_ID_SWDMA_MODES
] |= (i
<< 8 | i
);
814 if (!drive
->init_speed
)
815 drive
->init_speed
= speed
;
816 drive
->current_speed
= speed
;
821 * This should get invoked any time we exit the driver to
822 * wait for an interrupt response from a drive. handler() points
823 * at the appropriate code to handle the next interrupt, and a
824 * timer is started to prevent us from waiting forever in case
825 * something goes wrong (see the ide_timer_expiry() handler later on).
827 * See also ide_execute_command
829 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
830 unsigned int timeout
, ide_expiry_t
*expiry
)
832 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
834 BUG_ON(hwgroup
->handler
);
835 hwgroup
->handler
= handler
;
836 hwgroup
->expiry
= expiry
;
837 hwgroup
->timer
.expires
= jiffies
+ timeout
;
838 hwgroup
->req_gen_timer
= hwgroup
->req_gen
;
839 add_timer(&hwgroup
->timer
);
842 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
843 unsigned int timeout
, ide_expiry_t
*expiry
)
846 spin_lock_irqsave(&ide_lock
, flags
);
847 __ide_set_handler(drive
, handler
, timeout
, expiry
);
848 spin_unlock_irqrestore(&ide_lock
, flags
);
851 EXPORT_SYMBOL(ide_set_handler
);
854 * ide_execute_command - execute an IDE command
855 * @drive: IDE drive to issue the command against
856 * @command: command byte to write
857 * @handler: handler for next phase
858 * @timeout: timeout for command
859 * @expiry: handler to run on timeout
861 * Helper function to issue an IDE command. This handles the
862 * atomicity requirements, command timing and ensures that the
863 * handler and IRQ setup do not race. All IDE command kick off
864 * should go via this function or do equivalent locking.
867 void ide_execute_command(ide_drive_t
*drive
, u8 cmd
, ide_handler_t
*handler
,
868 unsigned timeout
, ide_expiry_t
*expiry
)
871 ide_hwif_t
*hwif
= HWIF(drive
);
873 spin_lock_irqsave(&ide_lock
, flags
);
874 __ide_set_handler(drive
, handler
, timeout
, expiry
);
875 hwif
->tp_ops
->exec_command(hwif
, cmd
);
877 * Drive takes 400nS to respond, we must avoid the IRQ being
878 * serviced before that.
880 * FIXME: we could skip this delay with care on non shared devices
883 spin_unlock_irqrestore(&ide_lock
, flags
);
885 EXPORT_SYMBOL(ide_execute_command
);
887 void ide_execute_pkt_cmd(ide_drive_t
*drive
)
889 ide_hwif_t
*hwif
= drive
->hwif
;
892 spin_lock_irqsave(&ide_lock
, flags
);
893 hwif
->tp_ops
->exec_command(hwif
, ATA_CMD_PACKET
);
895 spin_unlock_irqrestore(&ide_lock
, flags
);
897 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd
);
899 static inline void ide_complete_drive_reset(ide_drive_t
*drive
, int err
)
901 struct request
*rq
= drive
->hwif
->hwgroup
->rq
;
903 if (rq
&& blk_special_request(rq
) && rq
->cmd
[0] == REQ_DRIVE_RESET
)
904 ide_end_request(drive
, err
? err
: 1, 0);
908 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
911 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
912 * during an atapi drive reset operation. If the drive has not yet responded,
913 * and we have not yet hit our maximum waiting time, then the timer is restarted
916 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
918 ide_hwif_t
*hwif
= drive
->hwif
;
919 ide_hwgroup_t
*hwgroup
= hwif
->hwgroup
;
924 stat
= hwif
->tp_ops
->read_status(hwif
);
926 if (OK_STAT(stat
, 0, BUSY_STAT
))
927 printk("%s: ATAPI reset complete\n", drive
->name
);
929 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
930 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
931 /* continue polling */
935 hwgroup
->polling
= 0;
936 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
938 /* do it the old fashioned way */
939 return do_reset1(drive
, 1);
942 hwgroup
->polling
= 0;
943 ide_complete_drive_reset(drive
, 0);
948 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
949 * during an ide reset operation. If the drives have not yet responded,
950 * and we have not yet hit our maximum waiting time, then the timer is restarted
953 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
955 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
956 ide_hwif_t
*hwif
= HWIF(drive
);
957 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
961 if (port_ops
&& port_ops
->reset_poll
) {
962 err
= port_ops
->reset_poll(drive
);
964 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
965 hwif
->name
, drive
->name
);
970 tmp
= hwif
->tp_ops
->read_status(hwif
);
972 if (!OK_STAT(tmp
, 0, BUSY_STAT
)) {
973 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
974 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
975 /* continue polling */
978 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
982 printk("%s: reset: ", hwif
->name
);
983 tmp
= ide_read_error(drive
);
991 switch (tmp
& 0x7f) {
992 case 1: printk("passed");
994 case 2: printk("formatter device error");
996 case 3: printk("sector buffer error");
998 case 4: printk("ECC circuitry error");
1000 case 5: printk("controlling MPU error");
1002 default:printk("error (0x%02x?)", tmp
);
1005 printk("; slave: failed");
1011 hwgroup
->polling
= 0; /* done polling */
1012 ide_complete_drive_reset(drive
, err
);
1016 static void ide_disk_pre_reset(ide_drive_t
*drive
)
1018 int legacy
= (drive
->id
[ATA_ID_CFS_ENABLE_2
] & 0x0400) ? 0 : 1;
1020 drive
->special
.all
= 0;
1021 drive
->special
.b
.set_geometry
= legacy
;
1022 drive
->special
.b
.recalibrate
= legacy
;
1023 drive
->mult_count
= 0;
1024 if (!drive
->keep_settings
&& !drive
->using_dma
)
1025 drive
->mult_req
= 0;
1026 if (drive
->mult_req
!= drive
->mult_count
)
1027 drive
->special
.b
.set_multmode
= 1;
1030 static void pre_reset(ide_drive_t
*drive
)
1032 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
1034 if (drive
->media
== ide_disk
)
1035 ide_disk_pre_reset(drive
);
1037 drive
->post_reset
= 1;
1039 if (drive
->using_dma
) {
1040 if (drive
->crc_count
)
1041 ide_check_dma_crc(drive
);
1046 if (!drive
->keep_settings
) {
1047 if (!drive
->using_dma
) {
1049 drive
->io_32bit
= 0;
1054 if (port_ops
&& port_ops
->pre_reset
)
1055 port_ops
->pre_reset(drive
);
1057 if (drive
->current_speed
!= 0xff)
1058 drive
->desired_speed
= drive
->current_speed
;
1059 drive
->current_speed
= 0xff;
1063 * do_reset1() attempts to recover a confused drive by resetting it.
1064 * Unfortunately, resetting a disk drive actually resets all devices on
1065 * the same interface, so it can really be thought of as resetting the
1066 * interface rather than resetting the drive.
1068 * ATAPI devices have their own reset mechanism which allows them to be
1069 * individually reset without clobbering other devices on the same interface.
1071 * Unfortunately, the IDE interface does not generate an interrupt to let
1072 * us know when the reset operation has finished, so we must poll for this.
1073 * Equally poor, though, is the fact that this may a very long time to complete,
1074 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1075 * we set a timer to poll at 50ms intervals.
1077 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
1080 unsigned long flags
;
1082 ide_hwgroup_t
*hwgroup
;
1083 struct ide_io_ports
*io_ports
;
1084 const struct ide_tp_ops
*tp_ops
;
1085 const struct ide_port_ops
*port_ops
;
1087 spin_lock_irqsave(&ide_lock
, flags
);
1089 hwgroup
= HWGROUP(drive
);
1091 io_ports
= &hwif
->io_ports
;
1093 tp_ops
= hwif
->tp_ops
;
1095 /* We must not reset with running handlers */
1096 BUG_ON(hwgroup
->handler
!= NULL
);
1098 /* For an ATAPI device, first try an ATAPI SRST. */
1099 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
1101 SELECT_DRIVE(drive
);
1103 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
1105 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1106 hwgroup
->polling
= 1;
1107 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
1108 spin_unlock_irqrestore(&ide_lock
, flags
);
1113 * First, reset any device state data we were maintaining
1114 * for any of the drives on this interface.
1116 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
1117 pre_reset(&hwif
->drives
[unit
]);
1119 if (io_ports
->ctl_addr
== 0) {
1120 spin_unlock_irqrestore(&ide_lock
, flags
);
1121 ide_complete_drive_reset(drive
, -ENXIO
);
1126 * Note that we also set nIEN while resetting the device,
1127 * to mask unwanted interrupts from the interface during the reset.
1128 * However, due to the design of PC hardware, this will cause an
1129 * immediate interrupt due to the edge transition it produces.
1130 * This single interrupt gives us a "fast poll" for drives that
1131 * recover from reset very quickly, saving us the first 50ms wait time.
1133 * TODO: add ->softreset method and stop abusing ->set_irq
1135 /* set SRST and nIEN */
1136 tp_ops
->set_irq(hwif
, 4);
1137 /* more than enough time */
1139 /* clear SRST, leave nIEN (unless device is on the quirk list) */
1140 tp_ops
->set_irq(hwif
, drive
->quirk_list
== 2);
1141 /* more than enough time */
1143 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1144 hwgroup
->polling
= 1;
1145 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1148 * Some weird controller like resetting themselves to a strange
1149 * state when the disks are reset this way. At least, the Winbond
1150 * 553 documentation says that
1152 port_ops
= hwif
->port_ops
;
1153 if (port_ops
&& port_ops
->resetproc
)
1154 port_ops
->resetproc(drive
);
1156 spin_unlock_irqrestore(&ide_lock
, flags
);
1161 * ide_do_reset() is the entry point to the drive/interface reset code.
1164 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
1166 return do_reset1(drive
, 0);
1169 EXPORT_SYMBOL(ide_do_reset
);
1172 * ide_wait_not_busy() waits for the currently selected device on the hwif
1173 * to report a non-busy status, see comments in ide_probe_port().
1175 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
1181 * Turn this into a schedule() sleep once I'm sure
1182 * about locking issues (2.5 work ?).
1185 stat
= hwif
->tp_ops
->read_status(hwif
);
1186 if ((stat
& BUSY_STAT
) == 0)
1189 * Assume a value of 0xff means nothing is connected to
1190 * the interface and it doesn't implement the pull-down
1195 touch_softlockup_watchdog();
1196 touch_nmi_watchdog();
1201 EXPORT_SYMBOL_GPL(ide_wait_not_busy
);