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,
33 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
37 static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
38 module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
39 MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)");
41 #define NO_PORT_MULT 0xffff
42 #define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
44 #define REGS_PER_GTF 7
46 u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
50 * Helper - belongs in the PCI layer somewhere eventually
52 static int is_pci_dev(struct device *dev)
54 return (dev->bus == &pci_bus_type);
57 static void ata_acpi_clear_gtf(struct ata_device *dev)
59 kfree(dev->gtf_cache);
60 dev->gtf_cache = NULL;
64 * ata_acpi_associate_sata_port - associate SATA port with ACPI objects
65 * @ap: target SATA port
67 * Look up ACPI objects associated with @ap and initialize acpi_handle
68 * fields of @ap, the port and devices accordingly.
74 * 0 on success, -errno on failure.
76 void ata_acpi_associate_sata_port(struct ata_port *ap)
78 WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
80 if (!sata_pmp_attached(ap)) {
81 acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
83 ap->link.device->acpi_handle =
84 acpi_get_child(ap->host->acpi_handle, adr);
86 struct ata_link *link;
88 ap->link.device->acpi_handle = NULL;
90 ata_port_for_each_link(link, ap) {
91 acpi_integer adr = SATA_ADR(ap->port_no, link->pmp);
93 link->device->acpi_handle =
94 acpi_get_child(ap->host->acpi_handle, adr);
99 static void ata_acpi_associate_ide_port(struct ata_port *ap)
103 ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
104 if (!ap->acpi_handle)
108 if (ap->flags & ATA_FLAG_SLAVE_POSS)
111 for (i = 0; i < max_devices; i++) {
112 struct ata_device *dev = &ap->link.device[i];
114 dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
117 if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
118 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
121 static void ata_acpi_eject_device(acpi_handle handle)
123 struct acpi_object_list arg_list;
124 union acpi_object arg;
127 arg_list.pointer = &arg;
128 arg.type = ACPI_TYPE_INTEGER;
129 arg.integer.value = 1;
131 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0",
133 printk(KERN_ERR "Failed to evaluate _EJ0!\n");
136 /* @ap and @dev are the same as ata_acpi_handle_hotplug() */
137 static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
140 dev->flags |= ATA_DFLAG_DETACH;
142 struct ata_link *tlink;
143 struct ata_device *tdev;
145 ata_port_for_each_link(tlink, ap)
146 ata_link_for_each_dev(tdev, tlink)
147 tdev->flags |= ATA_DFLAG_DETACH;
150 ata_port_schedule_eh(ap);
154 * ata_acpi_handle_hotplug - ACPI event handler backend
155 * @ap: ATA port ACPI event occurred
156 * @dev: ATA device ACPI event occurred (can be NULL)
157 * @event: ACPI event which occurred
158 * @is_dock_event: boolean indicating whether the event was a dock one
160 * All ACPI bay / device realted events end up in this function. If
161 * the event is port-wide @dev is NULL. If the event is specific to a
162 * device, @dev points to it.
164 * Hotplug (as opposed to unplug) notification is always handled as
165 * port-wide while unplug only kills the target device on device-wide
169 * ACPI notify handler context. May sleep.
171 static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
172 u32 event, int is_dock_event)
174 char event_string[12];
175 char *envp[] = { event_string, NULL };
176 struct ata_eh_info *ehi = &ap->link.eh_info;
177 struct kobject *kobj = NULL;
180 acpi_handle handle, tmphandle;
186 kobj = &dev->sdev->sdev_gendev.kobj;
187 handle = dev->acpi_handle;
189 kobj = &ap->dev->kobj;
190 handle = ap->acpi_handle;
193 status = acpi_get_handle(handle, "_EJ0", &tmphandle);
194 if (ACPI_FAILURE(status))
195 /* This device does not support hotplug */
198 spin_lock_irqsave(ap->lock, flags);
201 case ACPI_NOTIFY_BUS_CHECK:
202 case ACPI_NOTIFY_DEVICE_CHECK:
203 ata_ehi_push_desc(ehi, "ACPI event");
205 status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
206 if (ACPI_FAILURE(status)) {
207 ata_port_printk(ap, KERN_ERR,
208 "acpi: failed to determine bay status (0x%x)\n",
214 ata_ehi_hotplugged(ehi);
217 /* The device has gone - unplug it */
218 ata_acpi_detach_device(ap, dev);
222 case ACPI_NOTIFY_EJECT_REQUEST:
223 ata_ehi_push_desc(ehi, "ACPI event");
228 /* undock event - immediate unplug */
229 ata_acpi_detach_device(ap, dev);
234 /* make sure kobj doesn't go away while ap->lock is released */
237 spin_unlock_irqrestore(ap->lock, flags);
240 ata_port_wait_eh(ap);
241 ata_acpi_eject_device(handle);
244 if (kobj && !is_dock_event) {
245 sprintf(event_string, "BAY_EVENT=%d", event);
246 kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
252 static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
254 struct ata_device *dev = data;
256 ata_acpi_handle_hotplug(dev->link->ap, dev, event, 1);
259 static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
261 struct ata_port *ap = data;
263 ata_acpi_handle_hotplug(ap, NULL, event, 1);
266 static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data)
268 struct ata_device *dev = data;
270 ata_acpi_handle_hotplug(dev->link->ap, dev, event, 0);
273 static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
275 struct ata_port *ap = data;
277 ata_acpi_handle_hotplug(ap, NULL, event, 0);
281 * ata_acpi_associate - associate ATA host with ACPI objects
282 * @host: target ATA host
284 * Look up ACPI objects associated with @host and initialize
285 * acpi_handle fields of @host, its ports and devices accordingly.
291 * 0 on success, -errno on failure.
293 void ata_acpi_associate(struct ata_host *host)
297 if (!is_pci_dev(host->dev) || libata_noacpi)
300 host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
301 if (!host->acpi_handle)
304 for (i = 0; i < host->n_ports; i++) {
305 struct ata_port *ap = host->ports[i];
307 if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
308 ata_acpi_associate_sata_port(ap);
310 ata_acpi_associate_ide_port(ap);
312 if (ap->acpi_handle) {
313 acpi_install_notify_handler(ap->acpi_handle,
315 ata_acpi_ap_notify, ap);
316 /* we might be on a docking station */
317 register_hotplug_dock_device(ap->acpi_handle,
318 ata_acpi_ap_notify_dock, ap);
321 for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
322 struct ata_device *dev = &ap->link.device[j];
324 if (dev->acpi_handle) {
325 acpi_install_notify_handler(dev->acpi_handle,
327 ata_acpi_dev_notify, dev);
328 /* we might be on a docking station */
329 register_hotplug_dock_device(dev->acpi_handle,
330 ata_acpi_dev_notify_dock, dev);
337 * ata_acpi_dissociate - dissociate ATA host from ACPI objects
338 * @host: target ATA host
340 * This function is called during driver detach after the whole host
346 void ata_acpi_dissociate(struct ata_host *host)
350 /* Restore initial _GTM values so that driver which attaches
351 * afterward can use them too.
353 for (i = 0; i < host->n_ports; i++) {
354 struct ata_port *ap = host->ports[i];
355 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
357 if (ap->acpi_handle && gtm)
358 ata_acpi_stm(ap, gtm);
363 * ata_acpi_gtm - execute _GTM
364 * @ap: target ATA port
365 * @gtm: out parameter for _GTM result
367 * Evaluate _GTM and store the result in @gtm.
373 * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
375 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
377 struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
378 union acpi_object *out_obj;
382 status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output);
385 if (status == AE_NOT_FOUND)
389 if (ACPI_FAILURE(status)) {
390 ata_port_printk(ap, KERN_ERR,
391 "ACPI get timing mode failed (AE 0x%x)\n",
396 out_obj = output.pointer;
397 if (out_obj->type != ACPI_TYPE_BUFFER) {
398 ata_port_printk(ap, KERN_WARNING,
399 "_GTM returned unexpected object type 0x%x\n",
405 if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
406 ata_port_printk(ap, KERN_ERR,
407 "_GTM returned invalid length %d\n",
408 out_obj->buffer.length);
412 memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
415 kfree(output.pointer);
419 EXPORT_SYMBOL_GPL(ata_acpi_gtm);
422 * ata_acpi_stm - execute _STM
423 * @ap: target ATA port
424 * @stm: timing parameter to _STM
426 * Evaluate _STM with timing parameter @stm.
432 * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
434 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
437 struct ata_acpi_gtm stm_buf = *stm;
438 struct acpi_object_list input;
439 union acpi_object in_params[3];
441 in_params[0].type = ACPI_TYPE_BUFFER;
442 in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
443 in_params[0].buffer.pointer = (u8 *)&stm_buf;
444 /* Buffers for id may need byteswapping ? */
445 in_params[1].type = ACPI_TYPE_BUFFER;
446 in_params[1].buffer.length = 512;
447 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
448 in_params[2].type = ACPI_TYPE_BUFFER;
449 in_params[2].buffer.length = 512;
450 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
453 input.pointer = in_params;
455 status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL);
457 if (status == AE_NOT_FOUND)
459 if (ACPI_FAILURE(status)) {
460 ata_port_printk(ap, KERN_ERR,
461 "ACPI set timing mode failed (status=0x%x)\n", status);
467 EXPORT_SYMBOL_GPL(ata_acpi_stm);
470 * ata_dev_get_GTF - get the drive bootup default taskfile settings
471 * @dev: target ATA device
472 * @gtf: output parameter for buffer containing _GTF taskfile arrays
474 * This applies to both PATA and SATA drives.
476 * The _GTF method has no input parameters.
477 * It returns a variable number of register set values (registers
478 * hex 1F1..1F7, taskfiles).
479 * The <variable number> is not known in advance, so have ACPI-CA
480 * allocate the buffer as needed and return it, then free it later.
486 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
487 * if _GTF is invalid.
489 static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
491 struct ata_port *ap = dev->link->ap;
493 struct acpi_buffer output;
494 union acpi_object *out_obj;
497 /* if _GTF is cached, use the cached value */
498 if (dev->gtf_cache) {
499 out_obj = dev->gtf_cache;
503 /* set up output buffer */
504 output.length = ACPI_ALLOCATE_BUFFER;
505 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
507 if (ata_msg_probe(ap))
508 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
509 __func__, ap->port_no);
511 /* _GTF has no input parameters */
512 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
513 out_obj = dev->gtf_cache = output.pointer;
515 if (ACPI_FAILURE(status)) {
516 if (status != AE_NOT_FOUND) {
517 ata_dev_printk(dev, KERN_WARNING,
518 "_GTF evaluation failed (AE 0x%x)\n",
525 if (!output.length || !output.pointer) {
526 if (ata_msg_probe(ap))
527 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
528 "length or ptr is NULL (0x%llx, 0x%p)\n",
530 (unsigned long long)output.length,
536 if (out_obj->type != ACPI_TYPE_BUFFER) {
537 ata_dev_printk(dev, KERN_WARNING,
538 "_GTF unexpected object type 0x%x\n",
544 if (out_obj->buffer.length % REGS_PER_GTF) {
545 ata_dev_printk(dev, KERN_WARNING,
546 "unexpected _GTF length (%d)\n",
547 out_obj->buffer.length);
553 rc = out_obj->buffer.length / REGS_PER_GTF;
555 *gtf = (void *)out_obj->buffer.pointer;
556 if (ata_msg_probe(ap))
557 ata_dev_printk(dev, KERN_DEBUG,
558 "%s: returning gtf=%p, gtf_count=%d\n",
564 ata_acpi_clear_gtf(dev);
569 * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter
570 * @dev: target device
571 * @gtm: GTM parameter to use
573 * Determine xfermask for @dev from @gtm.
579 * Determined xfermask.
581 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
582 const struct ata_acpi_gtm *gtm)
584 unsigned long xfer_mask = 0;
589 /* we always use the 0 slot for crap hardware */
591 if (!(gtm->flags & 0x10))
595 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
596 xfer_mask |= ata_xfer_mode2mask(mode);
598 /* See if we have MWDMA or UDMA data. We don't bother with
599 * MWDMA if UDMA is available as this means the BIOS set UDMA
600 * and our error changedown if it works is UDMA to PIO anyway.
602 if (!(gtm->flags & (1 << (2 * unit))))
603 type = ATA_SHIFT_MWDMA;
605 type = ATA_SHIFT_UDMA;
607 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
608 xfer_mask |= ata_xfer_mode2mask(mode);
612 EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
615 * ata_acpi_cbl_80wire - Check for 80 wire cable
617 * @gtm: GTM data to use
619 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
621 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
623 struct ata_device *dev;
625 ata_link_for_each_dev(dev, &ap->link) {
626 unsigned long xfer_mask, udma_mask;
628 if (!ata_dev_enabled(dev))
631 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
632 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
634 if (udma_mask & ~ATA_UDMA_MASK_40C)
640 EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
642 static void ata_acpi_gtf_to_tf(struct ata_device *dev,
643 const struct ata_acpi_gtf *gtf,
644 struct ata_taskfile *tf)
646 ata_tf_init(dev, tf);
648 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
649 tf->protocol = ATA_PROT_NODATA;
650 tf->feature = gtf->tf[0]; /* 0x1f1 */
651 tf->nsect = gtf->tf[1]; /* 0x1f2 */
652 tf->lbal = gtf->tf[2]; /* 0x1f3 */
653 tf->lbam = gtf->tf[3]; /* 0x1f4 */
654 tf->lbah = gtf->tf[4]; /* 0x1f5 */
655 tf->device = gtf->tf[5]; /* 0x1f6 */
656 tf->command = gtf->tf[6]; /* 0x1f7 */
659 static int ata_acpi_filter_tf(const struct ata_taskfile *tf,
660 const struct ata_taskfile *ptf)
662 if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) {
663 /* libata doesn't use ACPI to configure transfer mode.
664 * It will only confuse device configuration. Skip.
666 if (tf->command == ATA_CMD_SET_FEATURES &&
667 tf->feature == SETFEATURES_XFER)
671 if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) {
672 /* BIOS writers, sorry but we don't wanna lock
673 * features unless the user explicitly said so.
676 /* DEVICE CONFIGURATION FREEZE LOCK */
677 if (tf->command == ATA_CMD_CONF_OVERLAY &&
678 tf->feature == ATA_DCO_FREEZE_LOCK)
681 /* SECURITY FREEZE LOCK */
682 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
685 /* SET MAX LOCK and SET MAX FREEZE LOCK */
686 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
687 tf->command == ATA_CMD_SET_MAX &&
688 (tf->feature == ATA_SET_MAX_LOCK ||
689 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
697 * ata_acpi_run_tf - send taskfile registers to host controller
698 * @dev: target ATA device
699 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
701 * Outputs ATA taskfile to standard ATA host controller using MMIO
702 * or PIO as indicated by the ATA_FLAG_MMIO flag.
703 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
704 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
705 * hob_lbal, hob_lbam, and hob_lbah.
707 * This function waits for idle (!BUSY and !DRQ) after writing
708 * registers. If the control register has a new value, this
709 * function also waits for idle after writing control and before
710 * writing the remaining registers.
716 * 1 if command is executed successfully. 0 if ignored, rejected or
717 * filtered out, -errno on other errors.
719 static int ata_acpi_run_tf(struct ata_device *dev,
720 const struct ata_acpi_gtf *gtf,
721 const struct ata_acpi_gtf *prev_gtf)
723 struct ata_taskfile *pptf = NULL;
724 struct ata_taskfile tf, ptf, rtf;
725 unsigned int err_mask;
730 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
731 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
732 && (gtf->tf[6] == 0))
735 ata_acpi_gtf_to_tf(dev, gtf, &tf);
737 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
741 if (!ata_acpi_filter_tf(&tf, pptf)) {
743 err_mask = ata_exec_internal(dev, &rtf, NULL,
744 DMA_NONE, NULL, 0, 0);
749 snprintf(msg, sizeof(msg), "succeeded");
755 snprintf(msg, sizeof(msg),
756 "rejected by device (Stat=0x%02x Err=0x%02x)",
757 rtf.command, rtf.feature);
763 snprintf(msg, sizeof(msg),
764 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
765 err_mask, rtf.command, rtf.feature);
771 snprintf(msg, sizeof(msg), "filtered out");
775 ata_dev_printk(dev, level,
776 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n",
777 tf.command, tf.feature, tf.nsect, tf.lbal,
778 tf.lbam, tf.lbah, tf.device, msg);
784 * ata_acpi_exec_tfs - get then write drive taskfile settings
785 * @dev: target ATA device
786 * @nr_executed: out paramter for the number of executed commands
788 * Evaluate _GTF and excute returned taskfiles.
794 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
795 * -errno on other errors.
797 static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
799 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
800 int gtf_count, i, rc;
803 rc = ata_dev_get_GTF(dev, >f);
809 for (i = 0; i < gtf_count; i++, gtf++) {
810 rc = ata_acpi_run_tf(dev, gtf, pgtf);
819 ata_acpi_clear_gtf(dev);
827 * ata_acpi_push_id - send Identify data to drive
828 * @dev: target ATA device
830 * _SDD ACPI object: for SATA mode only
831 * Must be after Identify (Packet) Device -- uses its data
832 * ATM this function never returns a failure. It is an optional
833 * method and if it fails for whatever reason, we should still
840 * 0 on success, -errno on failure.
842 static int ata_acpi_push_id(struct ata_device *dev)
844 struct ata_port *ap = dev->link->ap;
847 struct acpi_object_list input;
848 union acpi_object in_params[1];
850 if (ata_msg_probe(ap))
851 ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
852 __func__, dev->devno, ap->port_no);
854 /* Give the drive Identify data to the drive via the _SDD method */
855 /* _SDD: set up input parameters */
857 input.pointer = in_params;
858 in_params[0].type = ACPI_TYPE_BUFFER;
859 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
860 in_params[0].buffer.pointer = (u8 *)dev->id;
861 /* Output buffer: _SDD has no output */
863 /* It's OK for _SDD to be missing too. */
864 swap_buf_le16(dev->id, ATA_ID_WORDS);
865 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
866 swap_buf_le16(dev->id, ATA_ID_WORDS);
868 err = ACPI_FAILURE(status) ? -EIO : 0;
870 ata_dev_printk(dev, KERN_WARNING,
871 "ACPI _SDD failed (AE 0x%x)\n", status);
877 * ata_acpi_on_suspend - ATA ACPI hook called on suspend
878 * @ap: target ATA port
880 * This function is called when @ap is about to be suspended. All
881 * devices are already put to sleep but the port_suspend() callback
882 * hasn't been executed yet. Error return from this function aborts
889 * 0 on success, -errno on failure.
891 int ata_acpi_on_suspend(struct ata_port *ap)
898 * ata_acpi_on_resume - ATA ACPI hook called on resume
899 * @ap: target ATA port
901 * This function is called when @ap is resumed - right after port
902 * itself is resumed but before any EH action is taken.
907 void ata_acpi_on_resume(struct ata_port *ap)
909 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
910 struct ata_device *dev;
912 if (ap->acpi_handle && gtm) {
915 /* restore timing parameters */
916 ata_acpi_stm(ap, gtm);
918 /* _GTF should immediately follow _STM so that it can
919 * use values set by _STM. Cache _GTF result and
922 ata_link_for_each_dev(dev, &ap->link) {
923 ata_acpi_clear_gtf(dev);
924 if (ata_dev_enabled(dev) &&
925 ata_dev_get_GTF(dev, NULL) >= 0)
926 dev->flags |= ATA_DFLAG_ACPI_PENDING;
929 /* SATA _GTF needs to be evaulated after _SDD and
930 * there's no reason to evaluate IDE _GTF early
931 * without _STM. Clear cache and schedule _GTF.
933 ata_link_for_each_dev(dev, &ap->link) {
934 ata_acpi_clear_gtf(dev);
935 if (ata_dev_enabled(dev))
936 dev->flags |= ATA_DFLAG_ACPI_PENDING;
942 * ata_acpi_set_state - set the port power state
943 * @ap: target ATA port
944 * @state: state, on/off
946 * This function executes the _PS0/_PS3 ACPI method to set the power state.
947 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
949 void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
951 struct ata_device *dev;
953 if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
956 /* channel first and then drives for power on and vica versa
958 if (state.event == PM_EVENT_ON)
959 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
961 ata_link_for_each_dev(dev, &ap->link) {
962 if (dev->acpi_handle && ata_dev_enabled(dev))
963 acpi_bus_set_power(dev->acpi_handle,
964 state.event == PM_EVENT_ON ?
965 ACPI_STATE_D0 : ACPI_STATE_D3);
967 if (state.event != PM_EVENT_ON)
968 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
972 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
973 * @dev: target ATA device
975 * This function is called when @dev is about to be configured.
976 * IDENTIFY data might have been modified after this hook is run.
982 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
985 int ata_acpi_on_devcfg(struct ata_device *dev)
987 struct ata_port *ap = dev->link->ap;
988 struct ata_eh_context *ehc = &ap->link.eh_context;
989 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
993 if (!dev->acpi_handle)
996 /* do we need to do _GTF? */
997 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
998 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
1001 /* do _SDD if SATA */
1003 rc = ata_acpi_push_id(dev);
1009 rc = ata_acpi_exec_tfs(dev, &nr_executed);
1013 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
1015 /* refresh IDENTIFY page if any _GTF command has been executed */
1017 rc = ata_dev_reread_id(dev, 0);
1019 ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
1020 "after ACPI commands\n");
1028 /* ignore evaluation failure if we can continue safely */
1029 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1032 /* fail and let EH retry once more for unknown IO errors */
1033 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
1034 dev->flags |= ATA_DFLAG_ACPI_FAILED;
1038 ata_dev_printk(dev, KERN_WARNING,
1039 "ACPI: failed the second time, disabled\n");
1040 dev->acpi_handle = NULL;
1042 /* We can safely continue if no _GTF command has been executed
1043 * and port is not frozen.
1045 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1052 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
1053 * @dev: target ATA device
1055 * This function is called when @dev is about to be disabled.
1060 void ata_acpi_on_disable(struct ata_device *dev)
1062 ata_acpi_clear_gtf(dev);