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e2984c62 BZ |
1 | #include <linux/kernel.h> |
2 | #include <linux/ide.h> | |
3 | #include <linux/hdreg.h> | |
4 | ||
5 | int generic_ide_suspend(struct device *dev, pm_message_t mesg) | |
6 | { | |
7 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); | |
898ec223 | 8 | ide_hwif_t *hwif = drive->hwif; |
e2984c62 BZ |
9 | struct request *rq; |
10 | struct request_pm_state rqpm; | |
11 | ide_task_t args; | |
12 | int ret; | |
13 | ||
14 | /* call ACPI _GTM only once */ | |
15 | if ((drive->dn & 1) == 0 || pair == NULL) | |
16 | ide_acpi_get_timing(hwif); | |
17 | ||
18 | memset(&rqpm, 0, sizeof(rqpm)); | |
19 | memset(&args, 0, sizeof(args)); | |
20 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
21 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
22 | rq->special = &args; | |
23 | rq->data = &rqpm; | |
24 | rqpm.pm_step = IDE_PM_START_SUSPEND; | |
25 | if (mesg.event == PM_EVENT_PRETHAW) | |
26 | mesg.event = PM_EVENT_FREEZE; | |
27 | rqpm.pm_state = mesg.event; | |
28 | ||
29 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); | |
30 | blk_put_request(rq); | |
31 | ||
32 | /* call ACPI _PS3 only after both devices are suspended */ | |
33 | if (ret == 0 && ((drive->dn & 1) || pair == NULL)) | |
34 | ide_acpi_set_state(hwif, 0); | |
35 | ||
36 | return ret; | |
37 | } | |
38 | ||
39 | int generic_ide_resume(struct device *dev) | |
40 | { | |
41 | ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive); | |
898ec223 | 42 | ide_hwif_t *hwif = drive->hwif; |
e2984c62 BZ |
43 | struct request *rq; |
44 | struct request_pm_state rqpm; | |
45 | ide_task_t args; | |
46 | int err; | |
47 | ||
48 | /* call ACPI _PS0 / _STM only once */ | |
49 | if ((drive->dn & 1) == 0 || pair == NULL) { | |
50 | ide_acpi_set_state(hwif, 1); | |
51 | ide_acpi_push_timing(hwif); | |
52 | } | |
53 | ||
54 | ide_acpi_exec_tfs(drive); | |
55 | ||
56 | memset(&rqpm, 0, sizeof(rqpm)); | |
57 | memset(&args, 0, sizeof(args)); | |
58 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
59 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
60 | rq->cmd_flags |= REQ_PREEMPT; | |
61 | rq->special = &args; | |
62 | rq->data = &rqpm; | |
63 | rqpm.pm_step = IDE_PM_START_RESUME; | |
64 | rqpm.pm_state = PM_EVENT_ON; | |
65 | ||
66 | err = blk_execute_rq(drive->queue, NULL, rq, 1); | |
67 | blk_put_request(rq); | |
68 | ||
69 | if (err == 0 && dev->driver) { | |
7f3c868b | 70 | struct ide_driver *drv = to_ide_driver(dev->driver); |
e2984c62 BZ |
71 | |
72 | if (drv->resume) | |
73 | drv->resume(drive); | |
74 | } | |
75 | ||
76 | return err; | |
77 | } | |
78 | ||
79 | void ide_complete_power_step(ide_drive_t *drive, struct request *rq) | |
80 | { | |
81 | struct request_pm_state *pm = rq->data; | |
82 | ||
83 | #ifdef DEBUG_PM | |
84 | printk(KERN_INFO "%s: complete_power_step(step: %d)\n", | |
85 | drive->name, pm->pm_step); | |
86 | #endif | |
87 | if (drive->media != ide_disk) | |
88 | return; | |
89 | ||
90 | switch (pm->pm_step) { | |
91 | case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */ | |
92 | if (pm->pm_state == PM_EVENT_FREEZE) | |
93 | pm->pm_step = IDE_PM_COMPLETED; | |
94 | else | |
95 | pm->pm_step = IDE_PM_STANDBY; | |
96 | break; | |
97 | case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ | |
98 | pm->pm_step = IDE_PM_COMPLETED; | |
99 | break; | |
100 | case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */ | |
101 | pm->pm_step = IDE_PM_IDLE; | |
102 | break; | |
103 | case IDE_PM_IDLE: /* Resume step 2 (idle)*/ | |
104 | pm->pm_step = IDE_PM_RESTORE_DMA; | |
105 | break; | |
106 | } | |
107 | } | |
108 | ||
109 | ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq) | |
110 | { | |
111 | struct request_pm_state *pm = rq->data; | |
112 | ide_task_t *args = rq->special; | |
113 | ||
114 | memset(args, 0, sizeof(*args)); | |
115 | ||
116 | switch (pm->pm_step) { | |
117 | case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */ | |
118 | if (drive->media != ide_disk) | |
119 | break; | |
120 | /* Not supported? Switch to next step now. */ | |
121 | if (ata_id_flush_enabled(drive->id) == 0 || | |
122 | (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) { | |
123 | ide_complete_power_step(drive, rq); | |
124 | return ide_stopped; | |
125 | } | |
126 | if (ata_id_flush_ext_enabled(drive->id)) | |
127 | args->tf.command = ATA_CMD_FLUSH_EXT; | |
128 | else | |
129 | args->tf.command = ATA_CMD_FLUSH; | |
130 | goto out_do_tf; | |
131 | case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ | |
132 | args->tf.command = ATA_CMD_STANDBYNOW1; | |
133 | goto out_do_tf; | |
134 | case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */ | |
135 | ide_set_max_pio(drive); | |
136 | /* | |
137 | * skip IDE_PM_IDLE for ATAPI devices | |
138 | */ | |
139 | if (drive->media != ide_disk) | |
140 | pm->pm_step = IDE_PM_RESTORE_DMA; | |
141 | else | |
142 | ide_complete_power_step(drive, rq); | |
143 | return ide_stopped; | |
144 | case IDE_PM_IDLE: /* Resume step 2 (idle) */ | |
145 | args->tf.command = ATA_CMD_IDLEIMMEDIATE; | |
146 | goto out_do_tf; | |
147 | case IDE_PM_RESTORE_DMA: /* Resume step 3 (restore DMA) */ | |
148 | /* | |
149 | * Right now, all we do is call ide_set_dma(drive), | |
150 | * we could be smarter and check for current xfer_speed | |
151 | * in struct drive etc... | |
152 | */ | |
153 | if (drive->hwif->dma_ops == NULL) | |
154 | break; | |
155 | /* | |
156 | * TODO: respect IDE_DFLAG_USING_DMA | |
157 | */ | |
158 | ide_set_dma(drive); | |
159 | break; | |
160 | } | |
161 | ||
162 | pm->pm_step = IDE_PM_COMPLETED; | |
163 | return ide_stopped; | |
164 | ||
165 | out_do_tf: | |
166 | args->tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; | |
167 | args->data_phase = TASKFILE_NO_DATA; | |
168 | return do_rw_taskfile(drive, args); | |
169 | } | |
170 | ||
171 | /** | |
3616b653 | 172 | * ide_complete_pm_rq - end the current Power Management request |
e2984c62 BZ |
173 | * @drive: target drive |
174 | * @rq: request | |
175 | * | |
176 | * This function cleans up the current PM request and stops the queue | |
177 | * if necessary. | |
178 | */ | |
3616b653 | 179 | void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq) |
e2984c62 BZ |
180 | { |
181 | struct request_queue *q = drive->queue; | |
3616b653 | 182 | struct request_pm_state *pm = rq->data; |
e2984c62 BZ |
183 | unsigned long flags; |
184 | ||
3616b653 BZ |
185 | ide_complete_power_step(drive, rq); |
186 | if (pm->pm_step != IDE_PM_COMPLETED) | |
187 | return; | |
188 | ||
e2984c62 BZ |
189 | #ifdef DEBUG_PM |
190 | printk("%s: completing PM request, %s\n", drive->name, | |
191 | blk_pm_suspend_request(rq) ? "suspend" : "resume"); | |
192 | #endif | |
193 | spin_lock_irqsave(q->queue_lock, flags); | |
2ea55210 | 194 | if (blk_pm_suspend_request(rq)) |
e2984c62 | 195 | blk_stop_queue(q); |
2ea55210 | 196 | else |
e2984c62 | 197 | drive->dev_flags &= ~IDE_DFLAG_BLOCKED; |
e2984c62 BZ |
198 | spin_unlock_irqrestore(q->queue_lock, flags); |
199 | ||
b65fac32 | 200 | drive->hwif->rq = NULL; |
e2984c62 BZ |
201 | |
202 | if (blk_end_request(rq, 0, 0)) | |
203 | BUG(); | |
204 | } | |
205 | ||
206 | void ide_check_pm_state(ide_drive_t *drive, struct request *rq) | |
207 | { | |
208 | struct request_pm_state *pm = rq->data; | |
209 | ||
210 | if (blk_pm_suspend_request(rq) && | |
211 | pm->pm_step == IDE_PM_START_SUSPEND) | |
212 | /* Mark drive blocked when starting the suspend sequence. */ | |
213 | drive->dev_flags |= IDE_DFLAG_BLOCKED; | |
214 | else if (blk_pm_resume_request(rq) && | |
215 | pm->pm_step == IDE_PM_START_RESUME) { | |
216 | /* | |
217 | * The first thing we do on wakeup is to wait for BSY bit to | |
218 | * go away (with a looong timeout) as a drive on this hwif may | |
219 | * just be POSTing itself. | |
220 | * We do that before even selecting as the "other" device on | |
221 | * the bus may be broken enough to walk on our toes at this | |
222 | * point. | |
223 | */ | |
224 | ide_hwif_t *hwif = drive->hwif; | |
2ea55210 BZ |
225 | struct request_queue *q = drive->queue; |
226 | unsigned long flags; | |
e2984c62 BZ |
227 | int rc; |
228 | #ifdef DEBUG_PM | |
229 | printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name); | |
230 | #endif | |
231 | rc = ide_wait_not_busy(hwif, 35000); | |
232 | if (rc) | |
233 | printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name); | |
234 | SELECT_DRIVE(drive); | |
235 | hwif->tp_ops->set_irq(hwif, 1); | |
236 | rc = ide_wait_not_busy(hwif, 100000); | |
237 | if (rc) | |
238 | printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name); | |
2ea55210 BZ |
239 | |
240 | spin_lock_irqsave(q->queue_lock, flags); | |
241 | blk_start_queue(q); | |
242 | spin_unlock_irqrestore(q->queue_lock, flags); | |
e2984c62 BZ |
243 | } |
244 | } |