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Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +01001#include <linux/kernel.h>
2#include <linux/ide.h>
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +01003
4int generic_ide_suspend(struct device *dev, pm_message_t mesg)
5{
6 ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive);
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +01007 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +01008 struct request *rq;
9 struct request_pm_state rqpm;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +010010 struct ide_cmd cmd;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010011 int ret;
12
13 /* call ACPI _GTM only once */
14 if ((drive->dn & 1) == 0 || pair == NULL)
15 ide_acpi_get_timing(hwif);
16
17 memset(&rqpm, 0, sizeof(rqpm));
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +010018 memset(&cmd, 0, sizeof(cmd));
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010019 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
20 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +010021 rq->special = &cmd;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010022 rq->data = &rqpm;
23 rqpm.pm_step = IDE_PM_START_SUSPEND;
24 if (mesg.event == PM_EVENT_PRETHAW)
25 mesg.event = PM_EVENT_FREEZE;
26 rqpm.pm_state = mesg.event;
27
28 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
29 blk_put_request(rq);
30
31 /* call ACPI _PS3 only after both devices are suspended */
32 if (ret == 0 && ((drive->dn & 1) || pair == NULL))
33 ide_acpi_set_state(hwif, 0);
34
35 return ret;
36}
37
38int generic_ide_resume(struct device *dev)
39{
40 ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive);
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +010041 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010042 struct request *rq;
43 struct request_pm_state rqpm;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +010044 struct ide_cmd cmd;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010045 int err;
46
47 /* call ACPI _PS0 / _STM only once */
48 if ((drive->dn & 1) == 0 || pair == NULL) {
49 ide_acpi_set_state(hwif, 1);
50 ide_acpi_push_timing(hwif);
51 }
52
53 ide_acpi_exec_tfs(drive);
54
55 memset(&rqpm, 0, sizeof(rqpm));
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +010056 memset(&cmd, 0, sizeof(cmd));
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010057 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
58 rq->cmd_type = REQ_TYPE_PM_RESUME;
59 rq->cmd_flags |= REQ_PREEMPT;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +010060 rq->special = &cmd;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010061 rq->data = &rqpm;
62 rqpm.pm_step = IDE_PM_START_RESUME;
63 rqpm.pm_state = PM_EVENT_ON;
64
65 err = blk_execute_rq(drive->queue, NULL, rq, 1);
66 blk_put_request(rq);
67
68 if (err == 0 && dev->driver) {
Bartlomiej Zolnierkiewicz7f3c8682009-01-06 17:20:53 +010069 struct ide_driver *drv = to_ide_driver(dev->driver);
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +010070
71 if (drv->resume)
72 drv->resume(drive);
73 }
74
75 return err;
76}
77
78void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
79{
80 struct request_pm_state *pm = rq->data;
81
82#ifdef DEBUG_PM
83 printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
84 drive->name, pm->pm_step);
85#endif
86 if (drive->media != ide_disk)
87 return;
88
89 switch (pm->pm_step) {
90 case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */
91 if (pm->pm_state == PM_EVENT_FREEZE)
92 pm->pm_step = IDE_PM_COMPLETED;
93 else
94 pm->pm_step = IDE_PM_STANDBY;
95 break;
96 case IDE_PM_STANDBY: /* Suspend step 2 (standby) */
97 pm->pm_step = IDE_PM_COMPLETED;
98 break;
99 case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */
100 pm->pm_step = IDE_PM_IDLE;
101 break;
102 case IDE_PM_IDLE: /* Resume step 2 (idle)*/
103 pm->pm_step = IDE_PM_RESTORE_DMA;
104 break;
105 }
106}
107
108ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
109{
110 struct request_pm_state *pm = rq->data;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100111 struct ide_cmd *cmd = rq->special;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100112
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100113 memset(cmd, 0, sizeof(*cmd));
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100114
115 switch (pm->pm_step) {
116 case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */
117 if (drive->media != ide_disk)
118 break;
119 /* Not supported? Switch to next step now. */
120 if (ata_id_flush_enabled(drive->id) == 0 ||
121 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) {
122 ide_complete_power_step(drive, rq);
123 return ide_stopped;
124 }
125 if (ata_id_flush_ext_enabled(drive->id))
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100126 cmd->tf.command = ATA_CMD_FLUSH_EXT;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100127 else
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100128 cmd->tf.command = ATA_CMD_FLUSH;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100129 goto out_do_tf;
130 case IDE_PM_STANDBY: /* Suspend step 2 (standby) */
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100131 cmd->tf.command = ATA_CMD_STANDBYNOW1;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100132 goto out_do_tf;
133 case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */
134 ide_set_max_pio(drive);
135 /*
136 * skip IDE_PM_IDLE for ATAPI devices
137 */
138 if (drive->media != ide_disk)
139 pm->pm_step = IDE_PM_RESTORE_DMA;
140 else
141 ide_complete_power_step(drive, rq);
142 return ide_stopped;
143 case IDE_PM_IDLE: /* Resume step 2 (idle) */
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100144 cmd->tf.command = ATA_CMD_IDLEIMMEDIATE;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100145 goto out_do_tf;
146 case IDE_PM_RESTORE_DMA: /* Resume step 3 (restore DMA) */
147 /*
148 * Right now, all we do is call ide_set_dma(drive),
149 * we could be smarter and check for current xfer_speed
150 * in struct drive etc...
151 */
152 if (drive->hwif->dma_ops == NULL)
153 break;
154 /*
155 * TODO: respect IDE_DFLAG_USING_DMA
156 */
157 ide_set_dma(drive);
158 break;
159 }
160
161 pm->pm_step = IDE_PM_COMPLETED;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100162
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100163 return ide_stopped;
164
165out_do_tf:
Bartlomiej Zolnierkiewicz0dfb9912009-03-27 12:46:39 +0100166 cmd->tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
167 cmd->protocol = ATA_PROT_NODATA;
Bartlomiej Zolnierkiewicz22aa4b32009-03-27 12:46:37 +0100168
169 return do_rw_taskfile(drive, cmd);
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100170}
171
172/**
Bartlomiej Zolnierkiewicz3616b652009-03-27 12:46:29 +0100173 * ide_complete_pm_rq - end the current Power Management request
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100174 * @drive: target drive
175 * @rq: request
176 *
177 * This function cleans up the current PM request and stops the queue
178 * if necessary.
179 */
Bartlomiej Zolnierkiewicz3616b652009-03-27 12:46:29 +0100180void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100181{
182 struct request_queue *q = drive->queue;
Bartlomiej Zolnierkiewicz3616b652009-03-27 12:46:29 +0100183 struct request_pm_state *pm = rq->data;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100184 unsigned long flags;
185
Bartlomiej Zolnierkiewicz3616b652009-03-27 12:46:29 +0100186 ide_complete_power_step(drive, rq);
187 if (pm->pm_step != IDE_PM_COMPLETED)
188 return;
189
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100190#ifdef DEBUG_PM
191 printk("%s: completing PM request, %s\n", drive->name,
192 blk_pm_suspend_request(rq) ? "suspend" : "resume");
193#endif
194 spin_lock_irqsave(q->queue_lock, flags);
Bartlomiej Zolnierkiewicz2ea55212009-01-14 19:19:04 +0100195 if (blk_pm_suspend_request(rq))
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100196 blk_stop_queue(q);
Bartlomiej Zolnierkiewicz2ea55212009-01-14 19:19:04 +0100197 else
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100198 drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100199 spin_unlock_irqrestore(q->queue_lock, flags);
200
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100201 drive->hwif->rq = NULL;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100202
203 if (blk_end_request(rq, 0, 0))
204 BUG();
205}
206
207void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
208{
209 struct request_pm_state *pm = rq->data;
210
211 if (blk_pm_suspend_request(rq) &&
212 pm->pm_step == IDE_PM_START_SUSPEND)
213 /* Mark drive blocked when starting the suspend sequence. */
214 drive->dev_flags |= IDE_DFLAG_BLOCKED;
215 else if (blk_pm_resume_request(rq) &&
216 pm->pm_step == IDE_PM_START_RESUME) {
217 /*
218 * The first thing we do on wakeup is to wait for BSY bit to
219 * go away (with a looong timeout) as a drive on this hwif may
220 * just be POSTing itself.
221 * We do that before even selecting as the "other" device on
222 * the bus may be broken enough to walk on our toes at this
223 * point.
224 */
225 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz2ea55212009-01-14 19:19:04 +0100226 struct request_queue *q = drive->queue;
227 unsigned long flags;
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100228 int rc;
229#ifdef DEBUG_PM
230 printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);
231#endif
232 rc = ide_wait_not_busy(hwif, 35000);
233 if (rc)
234 printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);
235 SELECT_DRIVE(drive);
236 hwif->tp_ops->set_irq(hwif, 1);
237 rc = ide_wait_not_busy(hwif, 100000);
238 if (rc)
239 printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
Bartlomiej Zolnierkiewicz2ea55212009-01-14 19:19:04 +0100240
241 spin_lock_irqsave(q->queue_lock, flags);
242 blk_start_queue(q);
243 spin_unlock_irqrestore(q->queue_lock, flags);
Bartlomiej Zolnierkiewicze2984c62008-12-29 20:27:37 +0100244 }
245}