3 * Provides ACPI support for PATA/SATA.
5 * Copyright (C) 2006 Intel Corp.
6 * Copyright (C) 2006 Randy Dunlap
9 #include <linux/module.h>
10 #include <linux/ata.h>
11 #include <linux/delay.h>
12 #include <linux/device.h>
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
15 #include <linux/acpi.h>
16 #include <linux/libata.h>
17 #include <linux/pci.h>
18 #include <scsi/scsi_device.h>
21 #include <acpi/acpi_bus.h>
22 #include <acpi/acnames.h>
23 #include <acpi/acnamesp.h>
24 #include <acpi/acparser.h>
25 #include <acpi/acexcep.h>
26 #include <acpi/acmacros.h>
27 #include <acpi/actypes.h>
30 ATA_ACPI_FILTER_SETXFER
= 1 << 0,
31 ATA_ACPI_FILTER_LOCK
= 1 << 1,
32 ATA_ACPI_FILTER_DIPM
= 1 << 2,
34 ATA_ACPI_FILTER_DEFAULT
= ATA_ACPI_FILTER_SETXFER
|
35 ATA_ACPI_FILTER_LOCK
|
39 static unsigned int ata_acpi_gtf_filter
= ATA_ACPI_FILTER_DEFAULT
;
40 module_param_named(acpi_gtf_filter
, ata_acpi_gtf_filter
, int, 0644);
41 MODULE_PARM_DESC(acpi_gtf_filter
, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM)");
43 #define NO_PORT_MULT 0xffff
44 #define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
46 #define REGS_PER_GTF 7
48 u8 tf
[REGS_PER_GTF
]; /* regs. 0x1f1 - 0x1f7 */
52 * Helper - belongs in the PCI layer somewhere eventually
54 static int is_pci_dev(struct device
*dev
)
56 return (dev
->bus
== &pci_bus_type
);
59 static void ata_acpi_clear_gtf(struct ata_device
*dev
)
61 kfree(dev
->gtf_cache
);
62 dev
->gtf_cache
= NULL
;
66 * ata_acpi_associate_sata_port - associate SATA port with ACPI objects
67 * @ap: target SATA port
69 * Look up ACPI objects associated with @ap and initialize acpi_handle
70 * fields of @ap, the port and devices accordingly.
76 * 0 on success, -errno on failure.
78 void ata_acpi_associate_sata_port(struct ata_port
*ap
)
80 WARN_ON(!(ap
->flags
& ATA_FLAG_ACPI_SATA
));
82 if (!sata_pmp_attached(ap
)) {
83 acpi_integer adr
= SATA_ADR(ap
->port_no
, NO_PORT_MULT
);
85 ap
->link
.device
->acpi_handle
=
86 acpi_get_child(ap
->host
->acpi_handle
, adr
);
88 struct ata_link
*link
;
90 ap
->link
.device
->acpi_handle
= NULL
;
92 ata_port_for_each_link(link
, ap
) {
93 acpi_integer adr
= SATA_ADR(ap
->port_no
, link
->pmp
);
95 link
->device
->acpi_handle
=
96 acpi_get_child(ap
->host
->acpi_handle
, adr
);
101 static void ata_acpi_associate_ide_port(struct ata_port
*ap
)
105 ap
->acpi_handle
= acpi_get_child(ap
->host
->acpi_handle
, ap
->port_no
);
106 if (!ap
->acpi_handle
)
110 if (ap
->flags
& ATA_FLAG_SLAVE_POSS
)
113 for (i
= 0; i
< max_devices
; i
++) {
114 struct ata_device
*dev
= &ap
->link
.device
[i
];
116 dev
->acpi_handle
= acpi_get_child(ap
->acpi_handle
, i
);
119 if (ata_acpi_gtm(ap
, &ap
->__acpi_init_gtm
) == 0)
120 ap
->pflags
|= ATA_PFLAG_INIT_GTM_VALID
;
123 /* @ap and @dev are the same as ata_acpi_handle_hotplug() */
124 static void ata_acpi_detach_device(struct ata_port
*ap
, struct ata_device
*dev
)
127 dev
->flags
|= ATA_DFLAG_DETACH
;
129 struct ata_link
*tlink
;
130 struct ata_device
*tdev
;
132 ata_port_for_each_link(tlink
, ap
)
133 ata_link_for_each_dev(tdev
, tlink
)
134 tdev
->flags
|= ATA_DFLAG_DETACH
;
137 ata_port_schedule_eh(ap
);
141 * ata_acpi_handle_hotplug - ACPI event handler backend
142 * @ap: ATA port ACPI event occurred
143 * @dev: ATA device ACPI event occurred (can be NULL)
144 * @event: ACPI event which occurred
146 * All ACPI bay / device realted events end up in this function. If
147 * the event is port-wide @dev is NULL. If the event is specific to a
148 * device, @dev points to it.
150 * Hotplug (as opposed to unplug) notification is always handled as
151 * port-wide while unplug only kills the target device on device-wide
155 * ACPI notify handler context. May sleep.
157 static void ata_acpi_handle_hotplug(struct ata_port
*ap
, struct ata_device
*dev
,
160 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
166 handle
= dev
->acpi_handle
;
168 handle
= ap
->acpi_handle
;
170 spin_lock_irqsave(ap
->lock
, flags
);
172 * When dock driver calls into the routine, it will always use
173 * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
174 * ACPI_NOTIFY_EJECT_REQUEST for remove
177 case ACPI_NOTIFY_BUS_CHECK
:
178 case ACPI_NOTIFY_DEVICE_CHECK
:
179 ata_ehi_push_desc(ehi
, "ACPI event");
181 ata_ehi_hotplugged(ehi
);
184 case ACPI_NOTIFY_EJECT_REQUEST
:
185 ata_ehi_push_desc(ehi
, "ACPI event");
187 ata_acpi_detach_device(ap
, dev
);
192 spin_unlock_irqrestore(ap
->lock
, flags
);
195 ata_port_wait_eh(ap
);
198 static void ata_acpi_dev_notify_dock(acpi_handle handle
, u32 event
, void *data
)
200 struct ata_device
*dev
= data
;
202 ata_acpi_handle_hotplug(dev
->link
->ap
, dev
, event
);
205 static void ata_acpi_ap_notify_dock(acpi_handle handle
, u32 event
, void *data
)
207 struct ata_port
*ap
= data
;
209 ata_acpi_handle_hotplug(ap
, NULL
, event
);
213 * ata_acpi_associate - associate ATA host with ACPI objects
214 * @host: target ATA host
216 * Look up ACPI objects associated with @host and initialize
217 * acpi_handle fields of @host, its ports and devices accordingly.
223 * 0 on success, -errno on failure.
225 void ata_acpi_associate(struct ata_host
*host
)
229 if (!is_pci_dev(host
->dev
) || libata_noacpi
)
232 host
->acpi_handle
= DEVICE_ACPI_HANDLE(host
->dev
);
233 if (!host
->acpi_handle
)
236 for (i
= 0; i
< host
->n_ports
; i
++) {
237 struct ata_port
*ap
= host
->ports
[i
];
239 if (host
->ports
[0]->flags
& ATA_FLAG_ACPI_SATA
)
240 ata_acpi_associate_sata_port(ap
);
242 ata_acpi_associate_ide_port(ap
);
244 if (ap
->acpi_handle
) {
245 /* we might be on a docking station */
246 register_hotplug_dock_device(ap
->acpi_handle
,
247 ata_acpi_ap_notify_dock
, ap
);
250 for (j
= 0; j
< ata_link_max_devices(&ap
->link
); j
++) {
251 struct ata_device
*dev
= &ap
->link
.device
[j
];
253 if (dev
->acpi_handle
) {
254 /* we might be on a docking station */
255 register_hotplug_dock_device(dev
->acpi_handle
,
256 ata_acpi_dev_notify_dock
, dev
);
263 * ata_acpi_dissociate - dissociate ATA host from ACPI objects
264 * @host: target ATA host
266 * This function is called during driver detach after the whole host
272 void ata_acpi_dissociate(struct ata_host
*host
)
276 /* Restore initial _GTM values so that driver which attaches
277 * afterward can use them too.
279 for (i
= 0; i
< host
->n_ports
; i
++) {
280 struct ata_port
*ap
= host
->ports
[i
];
281 const struct ata_acpi_gtm
*gtm
= ata_acpi_init_gtm(ap
);
283 if (ap
->acpi_handle
&& gtm
)
284 ata_acpi_stm(ap
, gtm
);
289 * ata_acpi_gtm - execute _GTM
290 * @ap: target ATA port
291 * @gtm: out parameter for _GTM result
293 * Evaluate _GTM and store the result in @gtm.
299 * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
301 int ata_acpi_gtm(struct ata_port
*ap
, struct ata_acpi_gtm
*gtm
)
303 struct acpi_buffer output
= { .length
= ACPI_ALLOCATE_BUFFER
};
304 union acpi_object
*out_obj
;
308 status
= acpi_evaluate_object(ap
->acpi_handle
, "_GTM", NULL
, &output
);
311 if (status
== AE_NOT_FOUND
)
315 if (ACPI_FAILURE(status
)) {
316 ata_port_printk(ap
, KERN_ERR
,
317 "ACPI get timing mode failed (AE 0x%x)\n",
322 out_obj
= output
.pointer
;
323 if (out_obj
->type
!= ACPI_TYPE_BUFFER
) {
324 ata_port_printk(ap
, KERN_WARNING
,
325 "_GTM returned unexpected object type 0x%x\n",
331 if (out_obj
->buffer
.length
!= sizeof(struct ata_acpi_gtm
)) {
332 ata_port_printk(ap
, KERN_ERR
,
333 "_GTM returned invalid length %d\n",
334 out_obj
->buffer
.length
);
338 memcpy(gtm
, out_obj
->buffer
.pointer
, sizeof(struct ata_acpi_gtm
));
341 kfree(output
.pointer
);
345 EXPORT_SYMBOL_GPL(ata_acpi_gtm
);
348 * ata_acpi_stm - execute _STM
349 * @ap: target ATA port
350 * @stm: timing parameter to _STM
352 * Evaluate _STM with timing parameter @stm.
358 * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
360 int ata_acpi_stm(struct ata_port
*ap
, const struct ata_acpi_gtm
*stm
)
363 struct ata_acpi_gtm stm_buf
= *stm
;
364 struct acpi_object_list input
;
365 union acpi_object in_params
[3];
367 in_params
[0].type
= ACPI_TYPE_BUFFER
;
368 in_params
[0].buffer
.length
= sizeof(struct ata_acpi_gtm
);
369 in_params
[0].buffer
.pointer
= (u8
*)&stm_buf
;
370 /* Buffers for id may need byteswapping ? */
371 in_params
[1].type
= ACPI_TYPE_BUFFER
;
372 in_params
[1].buffer
.length
= 512;
373 in_params
[1].buffer
.pointer
= (u8
*)ap
->link
.device
[0].id
;
374 in_params
[2].type
= ACPI_TYPE_BUFFER
;
375 in_params
[2].buffer
.length
= 512;
376 in_params
[2].buffer
.pointer
= (u8
*)ap
->link
.device
[1].id
;
379 input
.pointer
= in_params
;
381 status
= acpi_evaluate_object(ap
->acpi_handle
, "_STM", &input
, NULL
);
383 if (status
== AE_NOT_FOUND
)
385 if (ACPI_FAILURE(status
)) {
386 ata_port_printk(ap
, KERN_ERR
,
387 "ACPI set timing mode failed (status=0x%x)\n", status
);
393 EXPORT_SYMBOL_GPL(ata_acpi_stm
);
396 * ata_dev_get_GTF - get the drive bootup default taskfile settings
397 * @dev: target ATA device
398 * @gtf: output parameter for buffer containing _GTF taskfile arrays
400 * This applies to both PATA and SATA drives.
402 * The _GTF method has no input parameters.
403 * It returns a variable number of register set values (registers
404 * hex 1F1..1F7, taskfiles).
405 * The <variable number> is not known in advance, so have ACPI-CA
406 * allocate the buffer as needed and return it, then free it later.
412 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
413 * if _GTF is invalid.
415 static int ata_dev_get_GTF(struct ata_device
*dev
, struct ata_acpi_gtf
**gtf
)
417 struct ata_port
*ap
= dev
->link
->ap
;
419 struct acpi_buffer output
;
420 union acpi_object
*out_obj
;
423 /* if _GTF is cached, use the cached value */
424 if (dev
->gtf_cache
) {
425 out_obj
= dev
->gtf_cache
;
429 /* set up output buffer */
430 output
.length
= ACPI_ALLOCATE_BUFFER
;
431 output
.pointer
= NULL
; /* ACPI-CA sets this; save/free it later */
433 if (ata_msg_probe(ap
))
434 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER: port#: %d\n",
435 __func__
, ap
->port_no
);
437 /* _GTF has no input parameters */
438 status
= acpi_evaluate_object(dev
->acpi_handle
, "_GTF", NULL
, &output
);
439 out_obj
= dev
->gtf_cache
= output
.pointer
;
441 if (ACPI_FAILURE(status
)) {
442 if (status
!= AE_NOT_FOUND
) {
443 ata_dev_printk(dev
, KERN_WARNING
,
444 "_GTF evaluation failed (AE 0x%x)\n",
451 if (!output
.length
|| !output
.pointer
) {
452 if (ata_msg_probe(ap
))
453 ata_dev_printk(dev
, KERN_DEBUG
, "%s: Run _GTF: "
454 "length or ptr is NULL (0x%llx, 0x%p)\n",
456 (unsigned long long)output
.length
,
462 if (out_obj
->type
!= ACPI_TYPE_BUFFER
) {
463 ata_dev_printk(dev
, KERN_WARNING
,
464 "_GTF unexpected object type 0x%x\n",
470 if (out_obj
->buffer
.length
% REGS_PER_GTF
) {
471 ata_dev_printk(dev
, KERN_WARNING
,
472 "unexpected _GTF length (%d)\n",
473 out_obj
->buffer
.length
);
479 rc
= out_obj
->buffer
.length
/ REGS_PER_GTF
;
481 *gtf
= (void *)out_obj
->buffer
.pointer
;
482 if (ata_msg_probe(ap
))
483 ata_dev_printk(dev
, KERN_DEBUG
,
484 "%s: returning gtf=%p, gtf_count=%d\n",
490 ata_acpi_clear_gtf(dev
);
495 * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter
496 * @dev: target device
497 * @gtm: GTM parameter to use
499 * Determine xfermask for @dev from @gtm.
505 * Determined xfermask.
507 unsigned long ata_acpi_gtm_xfermask(struct ata_device
*dev
,
508 const struct ata_acpi_gtm
*gtm
)
510 unsigned long xfer_mask
= 0;
515 /* we always use the 0 slot for crap hardware */
517 if (!(gtm
->flags
& 0x10))
521 mode
= ata_timing_cycle2mode(ATA_SHIFT_PIO
, gtm
->drive
[unit
].pio
);
522 xfer_mask
|= ata_xfer_mode2mask(mode
);
524 /* See if we have MWDMA or UDMA data. We don't bother with
525 * MWDMA if UDMA is available as this means the BIOS set UDMA
526 * and our error changedown if it works is UDMA to PIO anyway.
528 if (!(gtm
->flags
& (1 << (2 * unit
))))
529 type
= ATA_SHIFT_MWDMA
;
531 type
= ATA_SHIFT_UDMA
;
533 mode
= ata_timing_cycle2mode(type
, gtm
->drive
[unit
].dma
);
534 xfer_mask
|= ata_xfer_mode2mask(mode
);
538 EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask
);
541 * ata_acpi_cbl_80wire - Check for 80 wire cable
543 * @gtm: GTM data to use
545 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
547 int ata_acpi_cbl_80wire(struct ata_port
*ap
, const struct ata_acpi_gtm
*gtm
)
549 struct ata_device
*dev
;
551 ata_link_for_each_dev(dev
, &ap
->link
) {
552 unsigned long xfer_mask
, udma_mask
;
554 if (!ata_dev_enabled(dev
))
557 xfer_mask
= ata_acpi_gtm_xfermask(dev
, gtm
);
558 ata_unpack_xfermask(xfer_mask
, NULL
, NULL
, &udma_mask
);
560 if (udma_mask
& ~ATA_UDMA_MASK_40C
)
566 EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire
);
568 static void ata_acpi_gtf_to_tf(struct ata_device
*dev
,
569 const struct ata_acpi_gtf
*gtf
,
570 struct ata_taskfile
*tf
)
572 ata_tf_init(dev
, tf
);
574 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
575 tf
->protocol
= ATA_PROT_NODATA
;
576 tf
->feature
= gtf
->tf
[0]; /* 0x1f1 */
577 tf
->nsect
= gtf
->tf
[1]; /* 0x1f2 */
578 tf
->lbal
= gtf
->tf
[2]; /* 0x1f3 */
579 tf
->lbam
= gtf
->tf
[3]; /* 0x1f4 */
580 tf
->lbah
= gtf
->tf
[4]; /* 0x1f5 */
581 tf
->device
= gtf
->tf
[5]; /* 0x1f6 */
582 tf
->command
= gtf
->tf
[6]; /* 0x1f7 */
585 static int ata_acpi_filter_tf(const struct ata_taskfile
*tf
,
586 const struct ata_taskfile
*ptf
)
588 if (ata_acpi_gtf_filter
& ATA_ACPI_FILTER_SETXFER
) {
589 /* libata doesn't use ACPI to configure transfer mode.
590 * It will only confuse device configuration. Skip.
592 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
593 tf
->feature
== SETFEATURES_XFER
)
597 if (ata_acpi_gtf_filter
& ATA_ACPI_FILTER_LOCK
) {
598 /* BIOS writers, sorry but we don't wanna lock
599 * features unless the user explicitly said so.
602 /* DEVICE CONFIGURATION FREEZE LOCK */
603 if (tf
->command
== ATA_CMD_CONF_OVERLAY
&&
604 tf
->feature
== ATA_DCO_FREEZE_LOCK
)
607 /* SECURITY FREEZE LOCK */
608 if (tf
->command
== ATA_CMD_SEC_FREEZE_LOCK
)
611 /* SET MAX LOCK and SET MAX FREEZE LOCK */
612 if ((!ptf
|| ptf
->command
!= ATA_CMD_READ_NATIVE_MAX
) &&
613 tf
->command
== ATA_CMD_SET_MAX
&&
614 (tf
->feature
== ATA_SET_MAX_LOCK
||
615 tf
->feature
== ATA_SET_MAX_FREEZE_LOCK
))
619 if (ata_acpi_gtf_filter
& ATA_ACPI_FILTER_DIPM
) {
620 /* inhibit enabling DIPM */
621 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
622 tf
->feature
== SETFEATURES_SATA_ENABLE
&&
623 tf
->nsect
== SATA_DIPM
)
631 * ata_acpi_run_tf - send taskfile registers to host controller
632 * @dev: target ATA device
633 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
635 * Outputs ATA taskfile to standard ATA host controller using MMIO
636 * or PIO as indicated by the ATA_FLAG_MMIO flag.
637 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
638 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
639 * hob_lbal, hob_lbam, and hob_lbah.
641 * This function waits for idle (!BUSY and !DRQ) after writing
642 * registers. If the control register has a new value, this
643 * function also waits for idle after writing control and before
644 * writing the remaining registers.
650 * 1 if command is executed successfully. 0 if ignored, rejected or
651 * filtered out, -errno on other errors.
653 static int ata_acpi_run_tf(struct ata_device
*dev
,
654 const struct ata_acpi_gtf
*gtf
,
655 const struct ata_acpi_gtf
*prev_gtf
)
657 struct ata_taskfile
*pptf
= NULL
;
658 struct ata_taskfile tf
, ptf
, rtf
;
659 unsigned int err_mask
;
664 if ((gtf
->tf
[0] == 0) && (gtf
->tf
[1] == 0) && (gtf
->tf
[2] == 0)
665 && (gtf
->tf
[3] == 0) && (gtf
->tf
[4] == 0) && (gtf
->tf
[5] == 0)
666 && (gtf
->tf
[6] == 0))
669 ata_acpi_gtf_to_tf(dev
, gtf
, &tf
);
671 ata_acpi_gtf_to_tf(dev
, prev_gtf
, &ptf
);
675 if (!ata_acpi_filter_tf(&tf
, pptf
)) {
677 err_mask
= ata_exec_internal(dev
, &rtf
, NULL
,
678 DMA_NONE
, NULL
, 0, 0);
683 snprintf(msg
, sizeof(msg
), "succeeded");
689 snprintf(msg
, sizeof(msg
),
690 "rejected by device (Stat=0x%02x Err=0x%02x)",
691 rtf
.command
, rtf
.feature
);
697 snprintf(msg
, sizeof(msg
),
698 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
699 err_mask
, rtf
.command
, rtf
.feature
);
705 snprintf(msg
, sizeof(msg
), "filtered out");
709 ata_dev_printk(dev
, level
,
710 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n",
711 tf
.command
, tf
.feature
, tf
.nsect
, tf
.lbal
,
712 tf
.lbam
, tf
.lbah
, tf
.device
, msg
);
718 * ata_acpi_exec_tfs - get then write drive taskfile settings
719 * @dev: target ATA device
720 * @nr_executed: out paramter for the number of executed commands
722 * Evaluate _GTF and excute returned taskfiles.
728 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
729 * -errno on other errors.
731 static int ata_acpi_exec_tfs(struct ata_device
*dev
, int *nr_executed
)
733 struct ata_acpi_gtf
*gtf
= NULL
, *pgtf
= NULL
;
734 int gtf_count
, i
, rc
;
737 rc
= ata_dev_get_GTF(dev
, >f
);
743 for (i
= 0; i
< gtf_count
; i
++, gtf
++) {
744 rc
= ata_acpi_run_tf(dev
, gtf
, pgtf
);
753 ata_acpi_clear_gtf(dev
);
761 * ata_acpi_push_id - send Identify data to drive
762 * @dev: target ATA device
764 * _SDD ACPI object: for SATA mode only
765 * Must be after Identify (Packet) Device -- uses its data
766 * ATM this function never returns a failure. It is an optional
767 * method and if it fails for whatever reason, we should still
774 * 0 on success, -errno on failure.
776 static int ata_acpi_push_id(struct ata_device
*dev
)
778 struct ata_port
*ap
= dev
->link
->ap
;
781 struct acpi_object_list input
;
782 union acpi_object in_params
[1];
784 if (ata_msg_probe(ap
))
785 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ix = %d, port#: %d\n",
786 __func__
, dev
->devno
, ap
->port_no
);
788 /* Give the drive Identify data to the drive via the _SDD method */
789 /* _SDD: set up input parameters */
791 input
.pointer
= in_params
;
792 in_params
[0].type
= ACPI_TYPE_BUFFER
;
793 in_params
[0].buffer
.length
= sizeof(dev
->id
[0]) * ATA_ID_WORDS
;
794 in_params
[0].buffer
.pointer
= (u8
*)dev
->id
;
795 /* Output buffer: _SDD has no output */
797 /* It's OK for _SDD to be missing too. */
798 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
799 status
= acpi_evaluate_object(dev
->acpi_handle
, "_SDD", &input
, NULL
);
800 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
802 err
= ACPI_FAILURE(status
) ? -EIO
: 0;
804 ata_dev_printk(dev
, KERN_WARNING
,
805 "ACPI _SDD failed (AE 0x%x)\n", status
);
811 * ata_acpi_on_suspend - ATA ACPI hook called on suspend
812 * @ap: target ATA port
814 * This function is called when @ap is about to be suspended. All
815 * devices are already put to sleep but the port_suspend() callback
816 * hasn't been executed yet. Error return from this function aborts
823 * 0 on success, -errno on failure.
825 int ata_acpi_on_suspend(struct ata_port
*ap
)
832 * ata_acpi_on_resume - ATA ACPI hook called on resume
833 * @ap: target ATA port
835 * This function is called when @ap is resumed - right after port
836 * itself is resumed but before any EH action is taken.
841 void ata_acpi_on_resume(struct ata_port
*ap
)
843 const struct ata_acpi_gtm
*gtm
= ata_acpi_init_gtm(ap
);
844 struct ata_device
*dev
;
846 if (ap
->acpi_handle
&& gtm
) {
849 /* restore timing parameters */
850 ata_acpi_stm(ap
, gtm
);
852 /* _GTF should immediately follow _STM so that it can
853 * use values set by _STM. Cache _GTF result and
856 ata_link_for_each_dev(dev
, &ap
->link
) {
857 ata_acpi_clear_gtf(dev
);
858 if (ata_dev_enabled(dev
) &&
859 ata_dev_get_GTF(dev
, NULL
) >= 0)
860 dev
->flags
|= ATA_DFLAG_ACPI_PENDING
;
863 /* SATA _GTF needs to be evaulated after _SDD and
864 * there's no reason to evaluate IDE _GTF early
865 * without _STM. Clear cache and schedule _GTF.
867 ata_link_for_each_dev(dev
, &ap
->link
) {
868 ata_acpi_clear_gtf(dev
);
869 if (ata_dev_enabled(dev
))
870 dev
->flags
|= ATA_DFLAG_ACPI_PENDING
;
876 * ata_acpi_set_state - set the port power state
877 * @ap: target ATA port
878 * @state: state, on/off
880 * This function executes the _PS0/_PS3 ACPI method to set the power state.
881 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
883 void ata_acpi_set_state(struct ata_port
*ap
, pm_message_t state
)
885 struct ata_device
*dev
;
887 if (!ap
->acpi_handle
|| (ap
->flags
& ATA_FLAG_ACPI_SATA
))
890 /* channel first and then drives for power on and vica versa
892 if (state
.event
== PM_EVENT_ON
)
893 acpi_bus_set_power(ap
->acpi_handle
, ACPI_STATE_D0
);
895 ata_link_for_each_dev(dev
, &ap
->link
) {
896 if (dev
->acpi_handle
&& ata_dev_enabled(dev
))
897 acpi_bus_set_power(dev
->acpi_handle
,
898 state
.event
== PM_EVENT_ON
?
899 ACPI_STATE_D0
: ACPI_STATE_D3
);
901 if (state
.event
!= PM_EVENT_ON
)
902 acpi_bus_set_power(ap
->acpi_handle
, ACPI_STATE_D3
);
906 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
907 * @dev: target ATA device
909 * This function is called when @dev is about to be configured.
910 * IDENTIFY data might have been modified after this hook is run.
916 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
919 int ata_acpi_on_devcfg(struct ata_device
*dev
)
921 struct ata_port
*ap
= dev
->link
->ap
;
922 struct ata_eh_context
*ehc
= &ap
->link
.eh_context
;
923 int acpi_sata
= ap
->flags
& ATA_FLAG_ACPI_SATA
;
927 if (!dev
->acpi_handle
)
930 /* do we need to do _GTF? */
931 if (!(dev
->flags
& ATA_DFLAG_ACPI_PENDING
) &&
932 !(acpi_sata
&& (ehc
->i
.flags
& ATA_EHI_DID_HARDRESET
)))
935 /* do _SDD if SATA */
937 rc
= ata_acpi_push_id(dev
);
943 rc
= ata_acpi_exec_tfs(dev
, &nr_executed
);
947 dev
->flags
&= ~ATA_DFLAG_ACPI_PENDING
;
949 /* refresh IDENTIFY page if any _GTF command has been executed */
951 rc
= ata_dev_reread_id(dev
, 0);
953 ata_dev_printk(dev
, KERN_ERR
, "failed to IDENTIFY "
954 "after ACPI commands\n");
962 /* ignore evaluation failure if we can continue safely */
963 if (rc
== -EINVAL
&& !nr_executed
&& !(ap
->pflags
& ATA_PFLAG_FROZEN
))
966 /* fail and let EH retry once more for unknown IO errors */
967 if (!(dev
->flags
& ATA_DFLAG_ACPI_FAILED
)) {
968 dev
->flags
|= ATA_DFLAG_ACPI_FAILED
;
972 ata_dev_printk(dev
, KERN_WARNING
,
973 "ACPI: failed the second time, disabled\n");
974 dev
->acpi_handle
= NULL
;
976 /* We can safely continue if no _GTF command has been executed
977 * and port is not frozen.
979 if (!nr_executed
&& !(ap
->pflags
& ATA_PFLAG_FROZEN
))
986 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
987 * @dev: target ATA device
989 * This function is called when @dev is about to be disabled.
994 void ata_acpi_on_disable(struct ata_device
*dev
)
996 ata_acpi_clear_gtf(dev
);