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_outb (u8 val
, unsigned long port
)
50 static void ide_outbsync (ide_drive_t
*drive
, u8 addr
, unsigned long port
)
55 static void ide_outw (u16 val
, unsigned long port
)
60 void default_hwif_iops (ide_hwif_t
*hwif
)
62 hwif
->OUTB
= ide_outb
;
63 hwif
->OUTBSYNC
= ide_outbsync
;
64 hwif
->OUTW
= ide_outw
;
70 * MMIO operations, typically used for SATA controllers
73 static u8
ide_mm_inb (unsigned long port
)
75 return (u8
) readb((void __iomem
*) port
);
78 static u16
ide_mm_inw (unsigned long port
)
80 return (u16
) readw((void __iomem
*) port
);
83 static void ide_mm_outb (u8 value
, unsigned long port
)
85 writeb(value
, (void __iomem
*) port
);
88 static void ide_mm_outbsync (ide_drive_t
*drive
, u8 value
, unsigned long port
)
90 writeb(value
, (void __iomem
*) port
);
93 static void ide_mm_outw (u16 value
, unsigned long port
)
95 writew(value
, (void __iomem
*) port
);
98 void default_hwif_mmiops (ide_hwif_t
*hwif
)
100 hwif
->OUTB
= ide_mm_outb
;
101 /* Most systems will need to override OUTBSYNC, alas however
102 this one is controller specific! */
103 hwif
->OUTBSYNC
= ide_mm_outbsync
;
104 hwif
->OUTW
= ide_mm_outw
;
105 hwif
->INB
= ide_mm_inb
;
106 hwif
->INW
= ide_mm_inw
;
109 EXPORT_SYMBOL(default_hwif_mmiops
);
111 void SELECT_DRIVE (ide_drive_t
*drive
)
113 ide_hwif_t
*hwif
= drive
->hwif
;
114 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
116 if (port_ops
&& port_ops
->selectproc
)
117 port_ops
->selectproc(drive
);
119 hwif
->OUTB(drive
->select
.all
, hwif
->io_ports
.device_addr
);
122 void SELECT_MASK (ide_drive_t
*drive
, int mask
)
124 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
126 if (port_ops
&& port_ops
->maskproc
)
127 port_ops
->maskproc(drive
, mask
);
131 * Some localbus EIDE interfaces require a special access sequence
132 * when using 32-bit I/O instructions to transfer data. We call this
133 * the "vlb_sync" sequence, which consists of three successive reads
134 * of the sector count register location, with interrupts disabled
135 * to ensure that the reads all happen together.
137 static void ata_vlb_sync(ide_drive_t
*drive
, unsigned long port
)
139 (void) HWIF(drive
)->INB(port
);
140 (void) HWIF(drive
)->INB(port
);
141 (void) HWIF(drive
)->INB(port
);
145 * This is used for most PIO data transfers *from* the IDE interface
147 * These routines will round up any request for an odd number of bytes,
148 * so if an odd len is specified, be sure that there's at least one
149 * extra byte allocated for the buffer.
151 static void ata_input_data(ide_drive_t
*drive
, struct request
*rq
,
152 void *buf
, unsigned int len
)
154 ide_hwif_t
*hwif
= drive
->hwif
;
155 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
156 unsigned long data_addr
= io_ports
->data_addr
;
157 u8 io_32bit
= drive
->io_32bit
;
158 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
163 unsigned long uninitialized_var(flags
);
166 local_irq_save(flags
);
167 ata_vlb_sync(drive
, io_ports
->nsect_addr
);
171 __ide_mm_insl((void __iomem
*)data_addr
, buf
, len
/ 4);
173 insl(data_addr
, buf
, len
/ 4);
176 local_irq_restore(flags
);
178 if ((len
& 3) >= 2) {
180 __ide_mm_insw((void __iomem
*)data_addr
,
181 (u8
*)buf
+ (len
& ~3), 1);
183 insw(data_addr
, (u8
*)buf
+ (len
& ~3), 1);
187 __ide_mm_insw((void __iomem
*)data_addr
, buf
, len
/ 2);
189 insw(data_addr
, buf
, len
/ 2);
194 * This is used for most PIO data transfers *to* the IDE interface
196 static void ata_output_data(ide_drive_t
*drive
, struct request
*rq
,
197 void *buf
, unsigned int len
)
199 ide_hwif_t
*hwif
= drive
->hwif
;
200 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
201 unsigned long data_addr
= io_ports
->data_addr
;
202 u8 io_32bit
= drive
->io_32bit
;
203 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
206 unsigned long uninitialized_var(flags
);
209 local_irq_save(flags
);
210 ata_vlb_sync(drive
, io_ports
->nsect_addr
);
214 __ide_mm_outsl((void __iomem
*)data_addr
, buf
, len
/ 4);
216 outsl(data_addr
, buf
, len
/ 4);
219 local_irq_restore(flags
);
221 if ((len
& 3) >= 2) {
223 __ide_mm_outsw((void __iomem
*)data_addr
,
224 (u8
*)buf
+ (len
& ~3), 1);
226 outsw(data_addr
, (u8
*)buf
+ (len
& ~3), 1);
230 __ide_mm_outsw((void __iomem
*)data_addr
, buf
, len
/ 2);
232 outsw(data_addr
, buf
, len
/ 2);
236 void default_hwif_transport(ide_hwif_t
*hwif
)
238 hwif
->input_data
= ata_input_data
;
239 hwif
->output_data
= ata_output_data
;
242 void ide_fix_driveid (struct hd_driveid
*id
)
244 #ifndef __LITTLE_ENDIAN
249 id
->config
= __le16_to_cpu(id
->config
);
250 id
->cyls
= __le16_to_cpu(id
->cyls
);
251 id
->reserved2
= __le16_to_cpu(id
->reserved2
);
252 id
->heads
= __le16_to_cpu(id
->heads
);
253 id
->track_bytes
= __le16_to_cpu(id
->track_bytes
);
254 id
->sector_bytes
= __le16_to_cpu(id
->sector_bytes
);
255 id
->sectors
= __le16_to_cpu(id
->sectors
);
256 id
->vendor0
= __le16_to_cpu(id
->vendor0
);
257 id
->vendor1
= __le16_to_cpu(id
->vendor1
);
258 id
->vendor2
= __le16_to_cpu(id
->vendor2
);
259 stringcast
= (u16
*)&id
->serial_no
[0];
260 for (i
= 0; i
< (20/2); i
++)
261 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
262 id
->buf_type
= __le16_to_cpu(id
->buf_type
);
263 id
->buf_size
= __le16_to_cpu(id
->buf_size
);
264 id
->ecc_bytes
= __le16_to_cpu(id
->ecc_bytes
);
265 stringcast
= (u16
*)&id
->fw_rev
[0];
266 for (i
= 0; i
< (8/2); i
++)
267 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
268 stringcast
= (u16
*)&id
->model
[0];
269 for (i
= 0; i
< (40/2); i
++)
270 stringcast
[i
] = __le16_to_cpu(stringcast
[i
]);
271 id
->dword_io
= __le16_to_cpu(id
->dword_io
);
272 id
->reserved50
= __le16_to_cpu(id
->reserved50
);
273 id
->field_valid
= __le16_to_cpu(id
->field_valid
);
274 id
->cur_cyls
= __le16_to_cpu(id
->cur_cyls
);
275 id
->cur_heads
= __le16_to_cpu(id
->cur_heads
);
276 id
->cur_sectors
= __le16_to_cpu(id
->cur_sectors
);
277 id
->cur_capacity0
= __le16_to_cpu(id
->cur_capacity0
);
278 id
->cur_capacity1
= __le16_to_cpu(id
->cur_capacity1
);
279 id
->lba_capacity
= __le32_to_cpu(id
->lba_capacity
);
280 id
->dma_1word
= __le16_to_cpu(id
->dma_1word
);
281 id
->dma_mword
= __le16_to_cpu(id
->dma_mword
);
282 id
->eide_pio_modes
= __le16_to_cpu(id
->eide_pio_modes
);
283 id
->eide_dma_min
= __le16_to_cpu(id
->eide_dma_min
);
284 id
->eide_dma_time
= __le16_to_cpu(id
->eide_dma_time
);
285 id
->eide_pio
= __le16_to_cpu(id
->eide_pio
);
286 id
->eide_pio_iordy
= __le16_to_cpu(id
->eide_pio_iordy
);
287 for (i
= 0; i
< 2; ++i
)
288 id
->words69_70
[i
] = __le16_to_cpu(id
->words69_70
[i
]);
289 for (i
= 0; i
< 4; ++i
)
290 id
->words71_74
[i
] = __le16_to_cpu(id
->words71_74
[i
]);
291 id
->queue_depth
= __le16_to_cpu(id
->queue_depth
);
292 for (i
= 0; i
< 4; ++i
)
293 id
->words76_79
[i
] = __le16_to_cpu(id
->words76_79
[i
]);
294 id
->major_rev_num
= __le16_to_cpu(id
->major_rev_num
);
295 id
->minor_rev_num
= __le16_to_cpu(id
->minor_rev_num
);
296 id
->command_set_1
= __le16_to_cpu(id
->command_set_1
);
297 id
->command_set_2
= __le16_to_cpu(id
->command_set_2
);
298 id
->cfsse
= __le16_to_cpu(id
->cfsse
);
299 id
->cfs_enable_1
= __le16_to_cpu(id
->cfs_enable_1
);
300 id
->cfs_enable_2
= __le16_to_cpu(id
->cfs_enable_2
);
301 id
->csf_default
= __le16_to_cpu(id
->csf_default
);
302 id
->dma_ultra
= __le16_to_cpu(id
->dma_ultra
);
303 id
->trseuc
= __le16_to_cpu(id
->trseuc
);
304 id
->trsEuc
= __le16_to_cpu(id
->trsEuc
);
305 id
->CurAPMvalues
= __le16_to_cpu(id
->CurAPMvalues
);
306 id
->mprc
= __le16_to_cpu(id
->mprc
);
307 id
->hw_config
= __le16_to_cpu(id
->hw_config
);
308 id
->acoustic
= __le16_to_cpu(id
->acoustic
);
309 id
->msrqs
= __le16_to_cpu(id
->msrqs
);
310 id
->sxfert
= __le16_to_cpu(id
->sxfert
);
311 id
->sal
= __le16_to_cpu(id
->sal
);
312 id
->spg
= __le32_to_cpu(id
->spg
);
313 id
->lba_capacity_2
= __le64_to_cpu(id
->lba_capacity_2
);
314 for (i
= 0; i
< 22; i
++)
315 id
->words104_125
[i
] = __le16_to_cpu(id
->words104_125
[i
]);
316 id
->last_lun
= __le16_to_cpu(id
->last_lun
);
317 id
->word127
= __le16_to_cpu(id
->word127
);
318 id
->dlf
= __le16_to_cpu(id
->dlf
);
319 id
->csfo
= __le16_to_cpu(id
->csfo
);
320 for (i
= 0; i
< 26; i
++)
321 id
->words130_155
[i
] = __le16_to_cpu(id
->words130_155
[i
]);
322 id
->word156
= __le16_to_cpu(id
->word156
);
323 for (i
= 0; i
< 3; i
++)
324 id
->words157_159
[i
] = __le16_to_cpu(id
->words157_159
[i
]);
325 id
->cfa_power
= __le16_to_cpu(id
->cfa_power
);
326 for (i
= 0; i
< 14; i
++)
327 id
->words161_175
[i
] = __le16_to_cpu(id
->words161_175
[i
]);
328 for (i
= 0; i
< 31; i
++)
329 id
->words176_205
[i
] = __le16_to_cpu(id
->words176_205
[i
]);
330 for (i
= 0; i
< 48; i
++)
331 id
->words206_254
[i
] = __le16_to_cpu(id
->words206_254
[i
]);
332 id
->integrity_word
= __le16_to_cpu(id
->integrity_word
);
334 # error "Please fix <asm/byteorder.h>"
340 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
341 * removing leading/trailing blanks and compressing internal blanks.
342 * It is primarily used to tidy up the model name/number fields as
343 * returned by the WIN_[P]IDENTIFY commands.
346 void ide_fixstring (u8
*s
, const int bytecount
, const int byteswap
)
348 u8
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
351 /* convert from big-endian to host byte order */
352 for (p
= end
; p
!= s
;) {
353 unsigned short *pp
= (unsigned short *) (p
-= 2);
357 /* strip leading blanks */
358 while (s
!= end
&& *s
== ' ')
360 /* compress internal blanks and strip trailing blanks */
361 while (s
!= end
&& *s
) {
362 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
365 /* wipe out trailing garbage */
370 EXPORT_SYMBOL(ide_fixstring
);
373 * Needed for PCI irq sharing
375 int drive_is_ready (ide_drive_t
*drive
)
377 ide_hwif_t
*hwif
= HWIF(drive
);
380 if (drive
->waiting_for_dma
)
381 return hwif
->dma_ops
->dma_test_irq(drive
);
384 /* need to guarantee 400ns since last command was issued */
389 * We do a passive status test under shared PCI interrupts on
390 * cards that truly share the ATA side interrupt, but may also share
391 * an interrupt with another pci card/device. We make no assumptions
392 * about possible isa-pnp and pci-pnp issues yet.
394 if (hwif
->io_ports
.ctl_addr
)
395 stat
= ide_read_altstatus(drive
);
397 /* Note: this may clear a pending IRQ!! */
398 stat
= ide_read_status(drive
);
400 if (stat
& BUSY_STAT
)
401 /* drive busy: definitely not interrupting */
404 /* drive ready: *might* be interrupting */
408 EXPORT_SYMBOL(drive_is_ready
);
411 * This routine busy-waits for the drive status to be not "busy".
412 * It then checks the status for all of the "good" bits and none
413 * of the "bad" bits, and if all is okay it returns 0. All other
414 * cases return error -- caller may then invoke ide_error().
416 * This routine should get fixed to not hog the cpu during extra long waits..
417 * That could be done by busy-waiting for the first jiffy or two, and then
418 * setting a timer to wake up at half second intervals thereafter,
419 * until timeout is achieved, before timing out.
421 static int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
, u8
*rstat
)
427 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
428 stat
= ide_read_status(drive
);
430 if (stat
& BUSY_STAT
) {
431 local_irq_set(flags
);
433 while ((stat
= ide_read_status(drive
)) & BUSY_STAT
) {
434 if (time_after(jiffies
, timeout
)) {
436 * One last read after the timeout in case
437 * heavy interrupt load made us not make any
438 * progress during the timeout..
440 stat
= ide_read_status(drive
);
441 if (!(stat
& BUSY_STAT
))
444 local_irq_restore(flags
);
449 local_irq_restore(flags
);
452 * Allow status to settle, then read it again.
453 * A few rare drives vastly violate the 400ns spec here,
454 * so we'll wait up to 10usec for a "good" status
455 * rather than expensively fail things immediately.
456 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
458 for (i
= 0; i
< 10; i
++) {
460 stat
= ide_read_status(drive
);
462 if (OK_STAT(stat
, good
, bad
)) {
472 * In case of error returns error value after doing "*startstop = ide_error()".
473 * The caller should return the updated value of "startstop" in this case,
474 * "startstop" is unchanged when the function returns 0.
476 int ide_wait_stat(ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
, u8 bad
, unsigned long timeout
)
481 /* bail early if we've exceeded max_failures */
482 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
483 *startstop
= ide_stopped
;
487 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
490 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
491 *startstop
= ide_error(drive
, s
, stat
);
497 EXPORT_SYMBOL(ide_wait_stat
);
500 * ide_in_drive_list - look for drive in black/white list
501 * @id: drive identifier
502 * @drive_table: list to inspect
504 * Look for a drive in the blacklist and the whitelist tables
505 * Returns 1 if the drive is found in the table.
508 int ide_in_drive_list(struct hd_driveid
*id
, const struct drive_list_entry
*drive_table
)
510 for ( ; drive_table
->id_model
; drive_table
++)
511 if ((!strcmp(drive_table
->id_model
, id
->model
)) &&
512 (!drive_table
->id_firmware
||
513 strstr(id
->fw_rev
, drive_table
->id_firmware
)))
518 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
521 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
522 * We list them here and depend on the device side cable detection for them.
524 * Some optical devices with the buggy firmwares have the same problem.
526 static const struct drive_list_entry ivb_list
[] = {
527 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
528 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
529 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
530 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
531 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
536 * All hosts that use the 80c ribbon must use!
537 * The name is derived from upper byte of word 93 and the 80c ribbon.
539 u8
eighty_ninty_three (ide_drive_t
*drive
)
541 ide_hwif_t
*hwif
= drive
->hwif
;
542 struct hd_driveid
*id
= drive
->id
;
543 int ivb
= ide_in_drive_list(id
, ivb_list
);
545 if (hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
549 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
552 if (ide_dev_is_sata(id
) && !ivb
)
555 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
560 * - change master/slave IDENTIFY order
561 * - force bit13 (80c cable present) check also for !ivb devices
562 * (unless the slave device is pre-ATA3)
564 if ((id
->hw_config
& 0x4000) || (ivb
&& (id
->hw_config
& 0x2000)))
568 if (drive
->udma33_warned
== 1)
571 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
572 "limiting max speed to UDMA33\n",
574 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
576 drive
->udma33_warned
= 1;
581 int ide_driveid_update(ide_drive_t
*drive
)
583 ide_hwif_t
*hwif
= drive
->hwif
;
584 struct hd_driveid
*id
;
585 unsigned long timeout
, flags
;
589 * Re-read drive->id for possible DMA mode
590 * change (copied from ide-probe.c)
593 SELECT_MASK(drive
, 1);
594 ide_set_irq(drive
, 1);
596 hwif
->OUTBSYNC(drive
, WIN_IDENTIFY
, hwif
->io_ports
.command_addr
);
597 timeout
= jiffies
+ WAIT_WORSTCASE
;
599 if (time_after(jiffies
, timeout
)) {
600 SELECT_MASK(drive
, 0);
601 return 0; /* drive timed-out */
604 msleep(50); /* give drive a breather */
605 stat
= ide_read_altstatus(drive
);
606 } while (stat
& BUSY_STAT
);
608 msleep(50); /* wait for IRQ and DRQ_STAT */
609 stat
= ide_read_status(drive
);
611 if (!OK_STAT(stat
, DRQ_STAT
, BAD_R_STAT
)) {
612 SELECT_MASK(drive
, 0);
613 printk("%s: CHECK for good STATUS\n", drive
->name
);
616 local_irq_save(flags
);
617 SELECT_MASK(drive
, 0);
618 id
= kmalloc(SECTOR_WORDS
*4, GFP_ATOMIC
);
620 local_irq_restore(flags
);
623 hwif
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
624 (void)ide_read_status(drive
); /* clear drive IRQ */
626 local_irq_restore(flags
);
629 drive
->id
->dma_ultra
= id
->dma_ultra
;
630 drive
->id
->dma_mword
= id
->dma_mword
;
631 drive
->id
->dma_1word
= id
->dma_1word
;
632 /* anything more ? */
635 if (drive
->using_dma
&& ide_id_dma_bug(drive
))
642 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
644 ide_hwif_t
*hwif
= drive
->hwif
;
645 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
649 // while (HWGROUP(drive)->busy)
652 #ifdef CONFIG_BLK_DEV_IDEDMA
653 if (hwif
->dma_ops
) /* check if host supports DMA */
654 hwif
->dma_ops
->dma_host_set(drive
, 0);
657 /* Skip setting PIO flow-control modes on pre-EIDE drives */
658 if ((speed
& 0xf8) == XFER_PIO_0
&& !(drive
->id
->capability
& 0x08))
662 * Don't use ide_wait_cmd here - it will
663 * attempt to set_geometry and recalibrate,
664 * but for some reason these don't work at
665 * this point (lost interrupt).
668 * Select the drive, and issue the SETFEATURES command
670 disable_irq_nosync(hwif
->irq
);
673 * FIXME: we race against the running IRQ here if
674 * this is called from non IRQ context. If we use
675 * disable_irq() we hang on the error path. Work
681 SELECT_MASK(drive
, 0);
683 ide_set_irq(drive
, 0);
684 hwif
->OUTB(speed
, io_ports
->nsect_addr
);
685 hwif
->OUTB(SETFEATURES_XFER
, io_ports
->feature_addr
);
686 hwif
->OUTBSYNC(drive
, WIN_SETFEATURES
, io_ports
->command_addr
);
687 if (drive
->quirk_list
== 2)
688 ide_set_irq(drive
, 1);
690 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
691 BUSY_STAT
|DRQ_STAT
|ERR_STAT
,
694 SELECT_MASK(drive
, 0);
696 enable_irq(hwif
->irq
);
699 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
703 drive
->id
->dma_ultra
&= ~0xFF00;
704 drive
->id
->dma_mword
&= ~0x0F00;
705 drive
->id
->dma_1word
&= ~0x0F00;
708 #ifdef CONFIG_BLK_DEV_IDEDMA
709 if ((speed
>= XFER_SW_DMA_0
|| (hwif
->host_flags
& IDE_HFLAG_VDMA
)) &&
711 hwif
->dma_ops
->dma_host_set(drive
, 1);
712 else if (hwif
->dma_ops
) /* check if host supports DMA */
713 ide_dma_off_quietly(drive
);
717 case XFER_UDMA_7
: drive
->id
->dma_ultra
|= 0x8080; break;
718 case XFER_UDMA_6
: drive
->id
->dma_ultra
|= 0x4040; break;
719 case XFER_UDMA_5
: drive
->id
->dma_ultra
|= 0x2020; break;
720 case XFER_UDMA_4
: drive
->id
->dma_ultra
|= 0x1010; break;
721 case XFER_UDMA_3
: drive
->id
->dma_ultra
|= 0x0808; break;
722 case XFER_UDMA_2
: drive
->id
->dma_ultra
|= 0x0404; break;
723 case XFER_UDMA_1
: drive
->id
->dma_ultra
|= 0x0202; break;
724 case XFER_UDMA_0
: drive
->id
->dma_ultra
|= 0x0101; break;
725 case XFER_MW_DMA_2
: drive
->id
->dma_mword
|= 0x0404; break;
726 case XFER_MW_DMA_1
: drive
->id
->dma_mword
|= 0x0202; break;
727 case XFER_MW_DMA_0
: drive
->id
->dma_mword
|= 0x0101; break;
728 case XFER_SW_DMA_2
: drive
->id
->dma_1word
|= 0x0404; break;
729 case XFER_SW_DMA_1
: drive
->id
->dma_1word
|= 0x0202; break;
730 case XFER_SW_DMA_0
: drive
->id
->dma_1word
|= 0x0101; break;
733 if (!drive
->init_speed
)
734 drive
->init_speed
= speed
;
735 drive
->current_speed
= speed
;
740 * This should get invoked any time we exit the driver to
741 * wait for an interrupt response from a drive. handler() points
742 * at the appropriate code to handle the next interrupt, and a
743 * timer is started to prevent us from waiting forever in case
744 * something goes wrong (see the ide_timer_expiry() handler later on).
746 * See also ide_execute_command
748 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
749 unsigned int timeout
, ide_expiry_t
*expiry
)
751 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
753 BUG_ON(hwgroup
->handler
);
754 hwgroup
->handler
= handler
;
755 hwgroup
->expiry
= expiry
;
756 hwgroup
->timer
.expires
= jiffies
+ timeout
;
757 hwgroup
->req_gen_timer
= hwgroup
->req_gen
;
758 add_timer(&hwgroup
->timer
);
761 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
762 unsigned int timeout
, ide_expiry_t
*expiry
)
765 spin_lock_irqsave(&ide_lock
, flags
);
766 __ide_set_handler(drive
, handler
, timeout
, expiry
);
767 spin_unlock_irqrestore(&ide_lock
, flags
);
770 EXPORT_SYMBOL(ide_set_handler
);
773 * ide_execute_command - execute an IDE command
774 * @drive: IDE drive to issue the command against
775 * @command: command byte to write
776 * @handler: handler for next phase
777 * @timeout: timeout for command
778 * @expiry: handler to run on timeout
780 * Helper function to issue an IDE command. This handles the
781 * atomicity requirements, command timing and ensures that the
782 * handler and IRQ setup do not race. All IDE command kick off
783 * should go via this function or do equivalent locking.
786 void ide_execute_command(ide_drive_t
*drive
, u8 cmd
, ide_handler_t
*handler
,
787 unsigned timeout
, ide_expiry_t
*expiry
)
790 ide_hwif_t
*hwif
= HWIF(drive
);
792 spin_lock_irqsave(&ide_lock
, flags
);
793 __ide_set_handler(drive
, handler
, timeout
, expiry
);
794 hwif
->OUTBSYNC(drive
, cmd
, hwif
->io_ports
.command_addr
);
796 * Drive takes 400nS to respond, we must avoid the IRQ being
797 * serviced before that.
799 * FIXME: we could skip this delay with care on non shared devices
802 spin_unlock_irqrestore(&ide_lock
, flags
);
805 EXPORT_SYMBOL(ide_execute_command
);
809 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
812 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
813 * during an atapi drive reset operation. If the drive has not yet responded,
814 * and we have not yet hit our maximum waiting time, then the timer is restarted
817 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
819 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
824 stat
= ide_read_status(drive
);
826 if (OK_STAT(stat
, 0, BUSY_STAT
))
827 printk("%s: ATAPI reset complete\n", drive
->name
);
829 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
830 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
831 /* continue polling */
835 hwgroup
->polling
= 0;
836 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
838 /* do it the old fashioned way */
839 return do_reset1(drive
, 1);
842 hwgroup
->polling
= 0;
843 hwgroup
->resetting
= 0;
848 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
849 * during an ide reset operation. If the drives have not yet responded,
850 * and we have not yet hit our maximum waiting time, then the timer is restarted
853 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
855 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
856 ide_hwif_t
*hwif
= HWIF(drive
);
857 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
860 if (port_ops
&& port_ops
->reset_poll
) {
861 if (port_ops
->reset_poll(drive
)) {
862 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
863 hwif
->name
, drive
->name
);
868 tmp
= ide_read_status(drive
);
870 if (!OK_STAT(tmp
, 0, BUSY_STAT
)) {
871 if (time_before(jiffies
, hwgroup
->poll_timeout
)) {
872 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
873 /* continue polling */
876 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
879 printk("%s: reset: ", hwif
->name
);
880 tmp
= ide_read_error(drive
);
888 switch (tmp
& 0x7f) {
889 case 1: printk("passed");
891 case 2: printk("formatter device error");
893 case 3: printk("sector buffer error");
895 case 4: printk("ECC circuitry error");
897 case 5: printk("controlling MPU error");
899 default:printk("error (0x%02x?)", tmp
);
902 printk("; slave: failed");
906 hwgroup
->polling
= 0; /* done polling */
907 hwgroup
->resetting
= 0; /* done reset attempt */
911 static void ide_disk_pre_reset(ide_drive_t
*drive
)
913 int legacy
= (drive
->id
->cfs_enable_2
& 0x0400) ? 0 : 1;
915 drive
->special
.all
= 0;
916 drive
->special
.b
.set_geometry
= legacy
;
917 drive
->special
.b
.recalibrate
= legacy
;
918 drive
->mult_count
= 0;
919 if (!drive
->keep_settings
&& !drive
->using_dma
)
921 if (drive
->mult_req
!= drive
->mult_count
)
922 drive
->special
.b
.set_multmode
= 1;
925 static void pre_reset(ide_drive_t
*drive
)
927 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
929 if (drive
->media
== ide_disk
)
930 ide_disk_pre_reset(drive
);
932 drive
->post_reset
= 1;
934 if (drive
->using_dma
) {
935 if (drive
->crc_count
)
936 ide_check_dma_crc(drive
);
941 if (!drive
->keep_settings
) {
942 if (!drive
->using_dma
) {
949 if (port_ops
&& port_ops
->pre_reset
)
950 port_ops
->pre_reset(drive
);
952 if (drive
->current_speed
!= 0xff)
953 drive
->desired_speed
= drive
->current_speed
;
954 drive
->current_speed
= 0xff;
958 * do_reset1() attempts to recover a confused drive by resetting it.
959 * Unfortunately, resetting a disk drive actually resets all devices on
960 * the same interface, so it can really be thought of as resetting the
961 * interface rather than resetting the drive.
963 * ATAPI devices have their own reset mechanism which allows them to be
964 * individually reset without clobbering other devices on the same interface.
966 * Unfortunately, the IDE interface does not generate an interrupt to let
967 * us know when the reset operation has finished, so we must poll for this.
968 * Equally poor, though, is the fact that this may a very long time to complete,
969 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
970 * we set a timer to poll at 50ms intervals.
972 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
977 ide_hwgroup_t
*hwgroup
;
978 struct ide_io_ports
*io_ports
;
979 const struct ide_port_ops
*port_ops
;
982 spin_lock_irqsave(&ide_lock
, flags
);
984 hwgroup
= HWGROUP(drive
);
986 io_ports
= &hwif
->io_ports
;
988 /* We must not reset with running handlers */
989 BUG_ON(hwgroup
->handler
!= NULL
);
991 /* For an ATAPI device, first try an ATAPI SRST. */
992 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
993 hwgroup
->resetting
= 1;
997 hwif
->OUTBSYNC(drive
, WIN_SRST
, io_ports
->command_addr
);
999 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1000 hwgroup
->polling
= 1;
1001 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
1002 spin_unlock_irqrestore(&ide_lock
, flags
);
1007 * First, reset any device state data we were maintaining
1008 * for any of the drives on this interface.
1010 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
1011 pre_reset(&hwif
->drives
[unit
]);
1013 if (io_ports
->ctl_addr
== 0) {
1014 spin_unlock_irqrestore(&ide_lock
, flags
);
1018 hwgroup
->resetting
= 1;
1020 * Note that we also set nIEN while resetting the device,
1021 * to mask unwanted interrupts from the interface during the reset.
1022 * However, due to the design of PC hardware, this will cause an
1023 * immediate interrupt due to the edge transition it produces.
1024 * This single interrupt gives us a "fast poll" for drives that
1025 * recover from reset very quickly, saving us the first 50ms wait time.
1027 /* set SRST and nIEN */
1028 hwif
->OUTBSYNC(drive
, drive
->ctl
|6, io_ports
->ctl_addr
);
1029 /* more than enough time */
1031 if (drive
->quirk_list
== 2)
1032 ctl
= drive
->ctl
; /* clear SRST and nIEN */
1034 ctl
= drive
->ctl
| 2; /* clear SRST, leave nIEN */
1035 hwif
->OUTBSYNC(drive
, ctl
, io_ports
->ctl_addr
);
1036 /* more than enough time */
1038 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
1039 hwgroup
->polling
= 1;
1040 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
1043 * Some weird controller like resetting themselves to a strange
1044 * state when the disks are reset this way. At least, the Winbond
1045 * 553 documentation says that
1047 port_ops
= hwif
->port_ops
;
1048 if (port_ops
&& port_ops
->resetproc
)
1049 port_ops
->resetproc(drive
);
1051 spin_unlock_irqrestore(&ide_lock
, flags
);
1056 * ide_do_reset() is the entry point to the drive/interface reset code.
1059 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
1061 return do_reset1(drive
, 0);
1064 EXPORT_SYMBOL(ide_do_reset
);
1067 * ide_wait_not_busy() waits for the currently selected device on the hwif
1068 * to report a non-busy status, see comments in ide_probe_port().
1070 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
1076 * Turn this into a schedule() sleep once I'm sure
1077 * about locking issues (2.5 work ?).
1080 stat
= hwif
->INB(hwif
->io_ports
.status_addr
);
1081 if ((stat
& BUSY_STAT
) == 0)
1084 * Assume a value of 0xff means nothing is connected to
1085 * the interface and it doesn't implement the pull-down
1090 touch_softlockup_watchdog();
1091 touch_nmi_watchdog();
1096 EXPORT_SYMBOL_GPL(ide_wait_not_busy
);