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1 | #include <linux/kernel.h> |
2 | #include <linux/ide.h> | |
e2984c62 BZ |
3 | |
4 | int 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); | |
898ec223 | 7 | ide_hwif_t *hwif = drive->hwif; |
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8 | struct request *rq; |
9 | struct request_pm_state rqpm; | |
22aa4b32 | 10 | struct ide_cmd cmd; |
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11 | 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)); | |
22aa4b32 | 18 | memset(&cmd, 0, sizeof(cmd)); |
e2984c62 BZ |
19 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
20 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
22aa4b32 | 21 | rq->special = &cmd; |
e2984c62 BZ |
22 | 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 | ||
38 | int generic_ide_resume(struct device *dev) | |
39 | { | |
40 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); | |
898ec223 | 41 | ide_hwif_t *hwif = drive->hwif; |
e2984c62 BZ |
42 | struct request *rq; |
43 | struct request_pm_state rqpm; | |
22aa4b32 | 44 | struct ide_cmd cmd; |
e2984c62 BZ |
45 | 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)); | |
22aa4b32 | 56 | memset(&cmd, 0, sizeof(cmd)); |
e2984c62 BZ |
57 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
58 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
59 | rq->cmd_flags |= REQ_PREEMPT; | |
22aa4b32 | 60 | rq->special = &cmd; |
e2984c62 BZ |
61 | 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) { | |
7f3c868b | 69 | struct ide_driver *drv = to_ide_driver(dev->driver); |
e2984c62 BZ |
70 | |
71 | if (drv->resume) | |
72 | drv->resume(drive); | |
73 | } | |
74 | ||
75 | return err; | |
76 | } | |
77 | ||
78 | void 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 | ||
108 | ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq) | |
109 | { | |
110 | struct request_pm_state *pm = rq->data; | |
22aa4b32 | 111 | struct ide_cmd *cmd = rq->special; |
e2984c62 | 112 | |
22aa4b32 | 113 | memset(cmd, 0, sizeof(*cmd)); |
e2984c62 BZ |
114 | |
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)) | |
22aa4b32 | 126 | cmd->tf.command = ATA_CMD_FLUSH_EXT; |
e2984c62 | 127 | else |
22aa4b32 | 128 | cmd->tf.command = ATA_CMD_FLUSH; |
e2984c62 BZ |
129 | goto out_do_tf; |
130 | case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ | |
22aa4b32 | 131 | cmd->tf.command = ATA_CMD_STANDBYNOW1; |
e2984c62 BZ |
132 | 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) */ | |
22aa4b32 | 144 | cmd->tf.command = ATA_CMD_IDLEIMMEDIATE; |
e2984c62 BZ |
145 | 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; | |
22aa4b32 | 162 | |
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163 | return ide_stopped; |
164 | ||
165 | out_do_tf: | |
0dfb991c BZ |
166 | cmd->tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
167 | cmd->protocol = ATA_PROT_NODATA; | |
22aa4b32 BZ |
168 | |
169 | return do_rw_taskfile(drive, cmd); | |
e2984c62 BZ |
170 | } |
171 | ||
172 | /** | |
3616b653 | 173 | * ide_complete_pm_rq - end the current Power Management request |
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174 | * @drive: target drive |
175 | * @rq: request | |
176 | * | |
177 | * This function cleans up the current PM request and stops the queue | |
178 | * if necessary. | |
179 | */ | |
3616b653 | 180 | void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq) |
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181 | { |
182 | struct request_queue *q = drive->queue; | |
3616b653 | 183 | struct request_pm_state *pm = rq->data; |
e2984c62 BZ |
184 | unsigned long flags; |
185 | ||
3616b653 BZ |
186 | ide_complete_power_step(drive, rq); |
187 | if (pm->pm_step != IDE_PM_COMPLETED) | |
188 | return; | |
189 | ||
e2984c62 BZ |
190 | #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); | |
2ea55210 | 195 | if (blk_pm_suspend_request(rq)) |
e2984c62 | 196 | blk_stop_queue(q); |
2ea55210 | 197 | else |
e2984c62 | 198 | drive->dev_flags &= ~IDE_DFLAG_BLOCKED; |
e2984c62 BZ |
199 | spin_unlock_irqrestore(q->queue_lock, flags); |
200 | ||
b65fac32 | 201 | drive->hwif->rq = NULL; |
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202 | |
203 | if (blk_end_request(rq, 0, 0)) | |
204 | BUG(); | |
205 | } | |
206 | ||
207 | void 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; | |
2ea55210 BZ |
226 | struct request_queue *q = drive->queue; |
227 | unsigned long flags; | |
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228 | 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); | |
ecf3a31d | 236 | hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
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237 | rc = ide_wait_not_busy(hwif, 100000); |
238 | if (rc) | |
239 | printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name); | |
2ea55210 BZ |
240 | |
241 | spin_lock_irqsave(q->queue_lock, flags); | |
242 | blk_start_queue(q); | |
243 | spin_unlock_irqrestore(q->queue_lock, flags); | |
e2984c62 BZ |
244 | } |
245 | } |