Commit | Line | Data |
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1c2a49f6 AV |
1 | /* |
2 | * AHCI SATA platform driver | |
3 | * | |
4 | * Copyright 2004-2005 Red Hat, Inc. | |
5 | * Jeff Garzik <jgarzik@pobox.com> | |
6 | * Copyright 2010 MontaVista Software, LLC. | |
7 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | */ | |
14 | ||
f1e70c2c | 15 | #include <linux/clk.h> |
1c2a49f6 | 16 | #include <linux/kernel.h> |
fbaf666b | 17 | #include <linux/gfp.h> |
1c2a49f6 | 18 | #include <linux/module.h> |
18c25ff4 | 19 | #include <linux/pm.h> |
1c2a49f6 AV |
20 | #include <linux/interrupt.h> |
21 | #include <linux/device.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/libata.h> | |
24 | #include <linux/ahci_platform.h> | |
21b5faee | 25 | #include <linux/phy/phy.h> |
e708e46e | 26 | #include <linux/pm_runtime.h> |
1c2a49f6 AV |
27 | #include "ahci.h" |
28 | ||
1896b15e BN |
29 | static void ahci_host_stop(struct ata_host *host); |
30 | ||
8b789d89 | 31 | struct ata_port_operations ahci_platform_ops = { |
1896b15e BN |
32 | .inherits = &ahci_ops, |
33 | .host_stop = ahci_host_stop, | |
34 | }; | |
8b789d89 | 35 | EXPORT_SYMBOL_GPL(ahci_platform_ops); |
1896b15e | 36 | |
c093e1d3 HG |
37 | static const struct ata_port_info ahci_port_info = { |
38 | .flags = AHCI_FLAG_COMMON, | |
39 | .pio_mask = ATA_PIO4, | |
40 | .udma_mask = ATA_UDMA6, | |
41 | .port_ops = &ahci_platform_ops, | |
904c04fe RZ |
42 | }; |
43 | ||
fad16e7a TH |
44 | static struct scsi_host_template ahci_platform_sht = { |
45 | AHCI_SHT("ahci_platform"), | |
46 | }; | |
47 | ||
156c5887 HG |
48 | /** |
49 | * ahci_platform_enable_clks - Enable platform clocks | |
50 | * @hpriv: host private area to store config values | |
51 | * | |
52 | * This function enables all the clks found in hpriv->clks, starting at | |
53 | * index 0. If any clk fails to enable it disables all the clks already | |
54 | * enabled in reverse order, and then returns an error. | |
55 | * | |
56 | * RETURNS: | |
57 | * 0 on success otherwise a negative error code | |
58 | */ | |
59 | int ahci_platform_enable_clks(struct ahci_host_priv *hpriv) | |
60 | { | |
61 | int c, rc; | |
62 | ||
63 | for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) { | |
64 | rc = clk_prepare_enable(hpriv->clks[c]); | |
65 | if (rc) | |
66 | goto disable_unprepare_clk; | |
67 | } | |
68 | return 0; | |
69 | ||
70 | disable_unprepare_clk: | |
71 | while (--c >= 0) | |
72 | clk_disable_unprepare(hpriv->clks[c]); | |
73 | return rc; | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(ahci_platform_enable_clks); | |
76 | ||
77 | /** | |
78 | * ahci_platform_disable_clks - Disable platform clocks | |
79 | * @hpriv: host private area to store config values | |
80 | * | |
81 | * This function disables all the clks found in hpriv->clks, in reverse | |
82 | * order of ahci_platform_enable_clks (starting at the end of the array). | |
83 | */ | |
84 | void ahci_platform_disable_clks(struct ahci_host_priv *hpriv) | |
85 | { | |
86 | int c; | |
87 | ||
88 | for (c = AHCI_MAX_CLKS - 1; c >= 0; c--) | |
89 | if (hpriv->clks[c]) | |
90 | clk_disable_unprepare(hpriv->clks[c]); | |
91 | } | |
92 | EXPORT_SYMBOL_GPL(ahci_platform_disable_clks); | |
93 | ||
96a01ba5 HG |
94 | /** |
95 | * ahci_platform_enable_resources - Enable platform resources | |
96 | * @hpriv: host private area to store config values | |
97 | * | |
98 | * This function enables all ahci_platform managed resources in the | |
99 | * following order: | |
100 | * 1) Regulator | |
101 | * 2) Clocks (through ahci_platform_enable_clks) | |
21b5faee | 102 | * 3) Phy |
96a01ba5 HG |
103 | * |
104 | * If resource enabling fails at any point the previous enabled resources | |
105 | * are disabled in reverse order. | |
106 | * | |
107 | * RETURNS: | |
108 | * 0 on success otherwise a negative error code | |
109 | */ | |
110 | int ahci_platform_enable_resources(struct ahci_host_priv *hpriv) | |
111 | { | |
112 | int rc; | |
113 | ||
114 | if (hpriv->target_pwr) { | |
115 | rc = regulator_enable(hpriv->target_pwr); | |
116 | if (rc) | |
117 | return rc; | |
118 | } | |
119 | ||
120 | rc = ahci_platform_enable_clks(hpriv); | |
121 | if (rc) | |
122 | goto disable_regulator; | |
123 | ||
21b5faee RQ |
124 | if (hpriv->phy) { |
125 | rc = phy_init(hpriv->phy); | |
126 | if (rc) | |
127 | goto disable_clks; | |
128 | ||
129 | rc = phy_power_on(hpriv->phy); | |
130 | if (rc) { | |
131 | phy_exit(hpriv->phy); | |
132 | goto disable_clks; | |
133 | } | |
134 | } | |
135 | ||
96a01ba5 HG |
136 | return 0; |
137 | ||
21b5faee RQ |
138 | disable_clks: |
139 | ahci_platform_disable_clks(hpriv); | |
140 | ||
96a01ba5 HG |
141 | disable_regulator: |
142 | if (hpriv->target_pwr) | |
143 | regulator_disable(hpriv->target_pwr); | |
144 | return rc; | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(ahci_platform_enable_resources); | |
147 | ||
148 | /** | |
149 | * ahci_platform_disable_resources - Disable platform resources | |
150 | * @hpriv: host private area to store config values | |
151 | * | |
152 | * This function disables all ahci_platform managed resources in the | |
153 | * following order: | |
21b5faee RQ |
154 | * 1) Phy |
155 | * 2) Clocks (through ahci_platform_disable_clks) | |
156 | * 3) Regulator | |
96a01ba5 HG |
157 | */ |
158 | void ahci_platform_disable_resources(struct ahci_host_priv *hpriv) | |
159 | { | |
21b5faee RQ |
160 | if (hpriv->phy) { |
161 | phy_power_off(hpriv->phy); | |
162 | phy_exit(hpriv->phy); | |
163 | } | |
164 | ||
96a01ba5 HG |
165 | ahci_platform_disable_clks(hpriv); |
166 | ||
167 | if (hpriv->target_pwr) | |
168 | regulator_disable(hpriv->target_pwr); | |
169 | } | |
170 | EXPORT_SYMBOL_GPL(ahci_platform_disable_resources); | |
171 | ||
23b07d4c | 172 | static void ahci_platform_put_resources(struct device *dev, void *res) |
156c5887 | 173 | { |
23b07d4c | 174 | struct ahci_host_priv *hpriv = res; |
156c5887 HG |
175 | int c; |
176 | ||
e708e46e RQ |
177 | if (hpriv->got_runtime_pm) { |
178 | pm_runtime_put_sync(dev); | |
179 | pm_runtime_disable(dev); | |
180 | } | |
181 | ||
156c5887 HG |
182 | for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) |
183 | clk_put(hpriv->clks[c]); | |
184 | } | |
185 | ||
23b07d4c HG |
186 | /** |
187 | * ahci_platform_get_resources - Get platform resources | |
188 | * @pdev: platform device to get resources for | |
189 | * | |
190 | * This function allocates an ahci_host_priv struct, and gets the following | |
191 | * resources, storing a reference to them inside the returned struct: | |
192 | * | |
193 | * 1) mmio registers (IORESOURCE_MEM 0, mandatory) | |
194 | * 2) regulator for controlling the targets power (optional) | |
195 | * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node, | |
196 | * or for non devicetree enabled platforms a single clock | |
21b5faee | 197 | * 4) phy (optional) |
23b07d4c HG |
198 | * |
199 | * RETURNS: | |
200 | * The allocated ahci_host_priv on success, otherwise an ERR_PTR value | |
201 | */ | |
202 | struct ahci_host_priv *ahci_platform_get_resources( | |
203 | struct platform_device *pdev) | |
1c2a49f6 AV |
204 | { |
205 | struct device *dev = &pdev->dev; | |
1c2a49f6 | 206 | struct ahci_host_priv *hpriv; |
156c5887 | 207 | struct clk *clk; |
23b07d4c | 208 | int i, rc = -ENOMEM; |
1c2a49f6 | 209 | |
23b07d4c HG |
210 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
211 | return ERR_PTR(-ENOMEM); | |
1c2a49f6 | 212 | |
23b07d4c HG |
213 | hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv), |
214 | GFP_KERNEL); | |
215 | if (!hpriv) | |
216 | goto err_out; | |
1c2a49f6 | 217 | |
23b07d4c | 218 | devres_add(dev, hpriv); |
1c2a49f6 | 219 | |
23b07d4c HG |
220 | hpriv->mmio = devm_ioremap_resource(dev, |
221 | platform_get_resource(pdev, IORESOURCE_MEM, 0)); | |
1c2a49f6 | 222 | if (!hpriv->mmio) { |
23b07d4c HG |
223 | dev_err(dev, "no mmio space\n"); |
224 | goto err_out; | |
08354809 JB |
225 | } |
226 | ||
4b3e603a HG |
227 | hpriv->target_pwr = devm_regulator_get_optional(dev, "target"); |
228 | if (IS_ERR(hpriv->target_pwr)) { | |
229 | rc = PTR_ERR(hpriv->target_pwr); | |
230 | if (rc == -EPROBE_DEFER) | |
23b07d4c | 231 | goto err_out; |
4b3e603a HG |
232 | hpriv->target_pwr = NULL; |
233 | } | |
234 | ||
156c5887 HG |
235 | for (i = 0; i < AHCI_MAX_CLKS; i++) { |
236 | /* | |
237 | * For now we must use clk_get(dev, NULL) for the first clock, | |
238 | * because some platforms (da850, spear13xx) are not yet | |
239 | * converted to use devicetree for clocks. For new platforms | |
240 | * this is equivalent to of_clk_get(dev->of_node, 0). | |
241 | */ | |
242 | if (i == 0) | |
243 | clk = clk_get(dev, NULL); | |
244 | else | |
245 | clk = of_clk_get(dev->of_node, i); | |
246 | ||
247 | if (IS_ERR(clk)) { | |
248 | rc = PTR_ERR(clk); | |
249 | if (rc == -EPROBE_DEFER) | |
23b07d4c | 250 | goto err_out; |
156c5887 | 251 | break; |
f1e70c2c | 252 | } |
156c5887 | 253 | hpriv->clks[i] = clk; |
f1e70c2c VK |
254 | } |
255 | ||
21b5faee RQ |
256 | hpriv->phy = devm_phy_get(dev, "sata-phy"); |
257 | if (IS_ERR(hpriv->phy)) { | |
258 | rc = PTR_ERR(hpriv->phy); | |
259 | switch (rc) { | |
260 | case -ENODEV: | |
261 | case -ENOSYS: | |
262 | /* continue normally */ | |
263 | hpriv->phy = NULL; | |
264 | break; | |
265 | ||
266 | case -EPROBE_DEFER: | |
267 | goto err_out; | |
268 | ||
269 | default: | |
270 | dev_err(dev, "couldn't get sata-phy\n"); | |
271 | goto err_out; | |
272 | } | |
273 | } | |
274 | ||
e708e46e RQ |
275 | pm_runtime_enable(dev); |
276 | pm_runtime_get_sync(dev); | |
277 | hpriv->got_runtime_pm = true; | |
278 | ||
23b07d4c HG |
279 | devres_remove_group(dev, NULL); |
280 | return hpriv; | |
156c5887 | 281 | |
23b07d4c HG |
282 | err_out: |
283 | devres_release_group(dev, NULL); | |
284 | return ERR_PTR(rc); | |
285 | } | |
286 | EXPORT_SYMBOL_GPL(ahci_platform_get_resources); | |
287 | ||
288 | /** | |
289 | * ahci_platform_init_host - Bring up an ahci-platform host | |
290 | * @pdev: platform device pointer for the host | |
291 | * @hpriv: ahci-host private data for the host | |
292 | * @pi_template: template for the ata_port_info to use | |
293 | * @force_port_map: param passed to ahci_save_initial_config | |
294 | * @mask_port_map: param passed to ahci_save_initial_config | |
295 | * | |
296 | * This function does all the usual steps needed to bring up an | |
297 | * ahci-platform host, note any necessary resources (ie clks, phy, etc.) | |
298 | * must be initialized / enabled before calling this. | |
299 | * | |
300 | * RETURNS: | |
301 | * 0 on success otherwise a negative error code | |
302 | */ | |
303 | int ahci_platform_init_host(struct platform_device *pdev, | |
304 | struct ahci_host_priv *hpriv, | |
305 | const struct ata_port_info *pi_template, | |
306 | unsigned int force_port_map, | |
307 | unsigned int mask_port_map) | |
308 | { | |
309 | struct device *dev = &pdev->dev; | |
310 | struct ata_port_info pi = *pi_template; | |
311 | const struct ata_port_info *ppi[] = { &pi, NULL }; | |
312 | struct ata_host *host; | |
313 | int i, irq, n_ports, rc; | |
1c2a49f6 | 314 | |
23b07d4c HG |
315 | irq = platform_get_irq(pdev, 0); |
316 | if (irq <= 0) { | |
317 | dev_err(dev, "no irq\n"); | |
318 | return -EINVAL; | |
319 | } | |
1c2a49f6 AV |
320 | |
321 | /* prepare host */ | |
23b07d4c HG |
322 | hpriv->flags |= (unsigned long)pi.private_data; |
323 | ||
324 | ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map); | |
325 | ||
1c2a49f6 AV |
326 | if (hpriv->cap & HOST_CAP_NCQ) |
327 | pi.flags |= ATA_FLAG_NCQ; | |
328 | ||
329 | if (hpriv->cap & HOST_CAP_PMP) | |
330 | pi.flags |= ATA_FLAG_PMP; | |
331 | ||
332 | ahci_set_em_messages(hpriv, &pi); | |
333 | ||
334 | /* CAP.NP sometimes indicate the index of the last enabled | |
335 | * port, at other times, that of the last possible port, so | |
336 | * determining the maximum port number requires looking at | |
337 | * both CAP.NP and port_map. | |
338 | */ | |
339 | n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); | |
340 | ||
341 | host = ata_host_alloc_pinfo(dev, ppi, n_ports); | |
23b07d4c HG |
342 | if (!host) |
343 | return -ENOMEM; | |
1c2a49f6 AV |
344 | |
345 | host->private_data = hpriv; | |
346 | ||
347 | if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) | |
348 | host->flags |= ATA_HOST_PARALLEL_SCAN; | |
349 | else | |
0fed4c09 | 350 | dev_info(dev, "SSS flag set, parallel bus scan disabled\n"); |
1c2a49f6 AV |
351 | |
352 | if (pi.flags & ATA_FLAG_EM) | |
353 | ahci_reset_em(host); | |
354 | ||
355 | for (i = 0; i < host->n_ports; i++) { | |
356 | struct ata_port *ap = host->ports[i]; | |
357 | ||
23b07d4c HG |
358 | ata_port_desc(ap, "mmio %pR", |
359 | platform_get_resource(pdev, IORESOURCE_MEM, 0)); | |
1c2a49f6 AV |
360 | ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); |
361 | ||
1c2a49f6 AV |
362 | /* set enclosure management message type */ |
363 | if (ap->flags & ATA_FLAG_EM) | |
55787183 | 364 | ap->em_message_type = hpriv->em_msg_type; |
1c2a49f6 AV |
365 | |
366 | /* disabled/not-implemented port */ | |
367 | if (!(hpriv->port_map & (1 << i))) | |
368 | ap->ops = &ata_dummy_port_ops; | |
369 | } | |
370 | ||
371 | rc = ahci_reset_controller(host); | |
372 | if (rc) | |
23b07d4c | 373 | return rc; |
1c2a49f6 AV |
374 | |
375 | ahci_init_controller(host); | |
376 | ahci_print_info(host, "platform"); | |
377 | ||
23b07d4c HG |
378 | return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, |
379 | &ahci_platform_sht); | |
380 | } | |
381 | EXPORT_SYMBOL_GPL(ahci_platform_init_host); | |
382 | ||
383 | static int ahci_probe(struct platform_device *pdev) | |
384 | { | |
385 | struct device *dev = &pdev->dev; | |
386 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
23b07d4c HG |
387 | struct ahci_host_priv *hpriv; |
388 | int rc; | |
389 | ||
390 | hpriv = ahci_platform_get_resources(pdev); | |
391 | if (IS_ERR(hpriv)) | |
392 | return PTR_ERR(hpriv); | |
393 | ||
394 | rc = ahci_platform_enable_resources(hpriv); | |
395 | if (rc) | |
396 | return rc; | |
397 | ||
398 | /* | |
399 | * Some platforms might need to prepare for mmio region access, | |
400 | * which could be done in the following init call. So, the mmio | |
401 | * region shouldn't be accessed before init (if provided) has | |
402 | * returned successfully. | |
403 | */ | |
404 | if (pdata && pdata->init) { | |
405 | rc = pdata->init(dev, hpriv->mmio); | |
406 | if (rc) | |
407 | goto disable_resources; | |
408 | } | |
409 | ||
6ef95e87 | 410 | rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info, 0, 0); |
1c2a49f6 | 411 | if (rc) |
f1e70c2c | 412 | goto pdata_exit; |
1c2a49f6 AV |
413 | |
414 | return 0; | |
f1e70c2c | 415 | pdata_exit: |
1c2a49f6 AV |
416 | if (pdata && pdata->exit) |
417 | pdata->exit(dev); | |
96a01ba5 HG |
418 | disable_resources: |
419 | ahci_platform_disable_resources(hpriv); | |
1c2a49f6 AV |
420 | return rc; |
421 | } | |
422 | ||
1896b15e BN |
423 | static void ahci_host_stop(struct ata_host *host) |
424 | { | |
425 | struct device *dev = host->dev; | |
426 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
427 | struct ahci_host_priv *hpriv = host->private_data; | |
428 | ||
1c2a49f6 AV |
429 | if (pdata && pdata->exit) |
430 | pdata->exit(dev); | |
431 | ||
96a01ba5 | 432 | ahci_platform_disable_resources(hpriv); |
1c2a49f6 AV |
433 | } |
434 | ||
29448ec1 | 435 | #ifdef CONFIG_PM_SLEEP |
648cb6fd HG |
436 | /** |
437 | * ahci_platform_suspend_host - Suspend an ahci-platform host | |
438 | * @dev: device pointer for the host | |
439 | * | |
440 | * This function does all the usual steps needed to suspend an | |
441 | * ahci-platform host, note any necessary resources (ie clks, phy, etc.) | |
442 | * must be disabled after calling this. | |
443 | * | |
444 | * RETURNS: | |
445 | * 0 on success otherwise a negative error code | |
446 | */ | |
447 | int ahci_platform_suspend_host(struct device *dev) | |
17ab594f | 448 | { |
17ab594f BN |
449 | struct ata_host *host = dev_get_drvdata(dev); |
450 | struct ahci_host_priv *hpriv = host->private_data; | |
451 | void __iomem *mmio = hpriv->mmio; | |
452 | u32 ctl; | |
17ab594f BN |
453 | |
454 | if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) { | |
455 | dev_err(dev, "firmware update required for suspend/resume\n"); | |
456 | return -EIO; | |
457 | } | |
458 | ||
459 | /* | |
460 | * AHCI spec rev1.1 section 8.3.3: | |
461 | * Software must disable interrupts prior to requesting a | |
462 | * transition of the HBA to D3 state. | |
463 | */ | |
464 | ctl = readl(mmio + HOST_CTL); | |
465 | ctl &= ~HOST_IRQ_EN; | |
466 | writel(ctl, mmio + HOST_CTL); | |
467 | readl(mmio + HOST_CTL); /* flush */ | |
468 | ||
648cb6fd HG |
469 | return ata_host_suspend(host, PMSG_SUSPEND); |
470 | } | |
471 | EXPORT_SYMBOL_GPL(ahci_platform_suspend_host); | |
472 | ||
473 | /** | |
474 | * ahci_platform_resume_host - Resume an ahci-platform host | |
475 | * @dev: device pointer for the host | |
476 | * | |
477 | * This function does all the usual steps needed to resume an ahci-platform | |
478 | * host, note any necessary resources (ie clks, phy, etc.) must be | |
479 | * initialized / enabled before calling this. | |
480 | * | |
481 | * RETURNS: | |
482 | * 0 on success otherwise a negative error code | |
483 | */ | |
484 | int ahci_platform_resume_host(struct device *dev) | |
485 | { | |
486 | struct ata_host *host = dev_get_drvdata(dev); | |
487 | int rc; | |
488 | ||
489 | if (dev->power.power_state.event == PM_EVENT_SUSPEND) { | |
490 | rc = ahci_reset_controller(host); | |
491 | if (rc) | |
492 | return rc; | |
493 | ||
494 | ahci_init_controller(host); | |
495 | } | |
496 | ||
497 | ata_host_resume(host); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | EXPORT_SYMBOL_GPL(ahci_platform_resume_host); | |
502 | ||
503 | /** | |
504 | * ahci_platform_suspend - Suspend an ahci-platform device | |
505 | * @dev: the platform device to suspend | |
506 | * | |
507 | * This function suspends the host associated with the device, followed by | |
508 | * disabling all the resources of the device. | |
509 | * | |
510 | * RETURNS: | |
511 | * 0 on success otherwise a negative error code | |
512 | */ | |
513 | int ahci_platform_suspend(struct device *dev) | |
514 | { | |
515 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
516 | struct ata_host *host = dev_get_drvdata(dev); | |
517 | struct ahci_host_priv *hpriv = host->private_data; | |
518 | int rc; | |
519 | ||
520 | rc = ahci_platform_suspend_host(dev); | |
17ab594f BN |
521 | if (rc) |
522 | return rc; | |
523 | ||
524 | if (pdata && pdata->suspend) | |
525 | return pdata->suspend(dev); | |
f1e70c2c | 526 | |
96a01ba5 | 527 | ahci_platform_disable_resources(hpriv); |
4b3e603a | 528 | |
17ab594f BN |
529 | return 0; |
530 | } | |
648cb6fd | 531 | EXPORT_SYMBOL_GPL(ahci_platform_suspend); |
17ab594f | 532 | |
648cb6fd HG |
533 | /** |
534 | * ahci_platform_resume - Resume an ahci-platform device | |
535 | * @dev: the platform device to resume | |
536 | * | |
537 | * This function enables all the resources of the device followed by | |
538 | * resuming the host associated with the device. | |
539 | * | |
540 | * RETURNS: | |
541 | * 0 on success otherwise a negative error code | |
542 | */ | |
543 | int ahci_platform_resume(struct device *dev) | |
17ab594f BN |
544 | { |
545 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
546 | struct ata_host *host = dev_get_drvdata(dev); | |
f1e70c2c | 547 | struct ahci_host_priv *hpriv = host->private_data; |
17ab594f BN |
548 | int rc; |
549 | ||
96a01ba5 | 550 | rc = ahci_platform_enable_resources(hpriv); |
156c5887 | 551 | if (rc) |
96a01ba5 | 552 | return rc; |
f1e70c2c | 553 | |
17ab594f BN |
554 | if (pdata && pdata->resume) { |
555 | rc = pdata->resume(dev); | |
556 | if (rc) | |
96a01ba5 | 557 | goto disable_resources; |
17ab594f BN |
558 | } |
559 | ||
648cb6fd HG |
560 | rc = ahci_platform_resume_host(dev); |
561 | if (rc) | |
562 | goto disable_resources; | |
17ab594f | 563 | |
e708e46e RQ |
564 | /* We resumed so update PM runtime state */ |
565 | pm_runtime_disable(dev); | |
566 | pm_runtime_set_active(dev); | |
567 | pm_runtime_enable(dev); | |
568 | ||
17ab594f | 569 | return 0; |
f1e70c2c | 570 | |
96a01ba5 HG |
571 | disable_resources: |
572 | ahci_platform_disable_resources(hpriv); | |
f1e70c2c VK |
573 | |
574 | return rc; | |
17ab594f | 575 | } |
648cb6fd | 576 | EXPORT_SYMBOL_GPL(ahci_platform_resume); |
17ab594f BN |
577 | #endif |
578 | ||
648cb6fd HG |
579 | static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend, |
580 | ahci_platform_resume); | |
18c25ff4 | 581 | |
02aac316 | 582 | static const struct of_device_id ahci_of_match[] = { |
5f098a3e | 583 | { .compatible = "snps,spear-ahci", }, |
1e8f5f76 | 584 | { .compatible = "snps,exynos5440-ahci", }, |
2435dcb9 | 585 | { .compatible = "ibm,476gtr-ahci", }, |
c4311471 | 586 | { .compatible = "snps,dwc-ahci", }, |
02aac316 RH |
587 | {}, |
588 | }; | |
589 | MODULE_DEVICE_TABLE(of, ahci_of_match); | |
590 | ||
1c2a49f6 | 591 | static struct platform_driver ahci_driver = { |
941c77fd | 592 | .probe = ahci_probe, |
83291d65 | 593 | .remove = ata_platform_remove_one, |
1c2a49f6 AV |
594 | .driver = { |
595 | .name = "ahci", | |
596 | .owner = THIS_MODULE, | |
02aac316 | 597 | .of_match_table = ahci_of_match, |
17ab594f | 598 | .pm = &ahci_pm_ops, |
1c2a49f6 AV |
599 | }, |
600 | }; | |
9a99e476 | 601 | module_platform_driver(ahci_driver); |
1c2a49f6 AV |
602 | |
603 | MODULE_DESCRIPTION("AHCI SATA platform driver"); | |
604 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
605 | MODULE_LICENSE("GPL"); | |
606 | MODULE_ALIAS("platform:ahci"); |