blob: cd2eab6aa92ea245e1a3dab839be7fe8aa938cdb [file] [log] [blame]
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +01001/*
2 * AHCI SATA platform library
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
15#include <linux/clk.h>
16#include <linux/kernel.h>
17#include <linux/gfp.h>
18#include <linux/module.h>
19#include <linux/pm.h>
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>
25#include <linux/phy/phy.h>
26#include <linux/pm_runtime.h>
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +010027#include <linux/of_platform.h>
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +010028#include "ahci.h"
29
30static void ahci_host_stop(struct ata_host *host);
31
32struct ata_port_operations ahci_platform_ops = {
33 .inherits = &ahci_ops,
34 .host_stop = ahci_host_stop,
35};
36EXPORT_SYMBOL_GPL(ahci_platform_ops);
37
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +010038/**
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020039 * ahci_platform_enable_phys - Enable PHYs
40 * @hpriv: host private area to store config values
41 *
42 * This function enables all the PHYs found in hpriv->phys, if any.
43 * If a PHY fails to be enabled, it disables all the PHYs already
44 * enabled in reverse order and returns an error.
45 *
46 * RETURNS:
47 * 0 on success otherwise a negative error code
48 */
Fabio Estevam6bb86fe2014-08-30 16:39:09 -030049static int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020050{
51 int rc, i;
52
53 for (i = 0; i < hpriv->nports; i++) {
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020054 rc = phy_init(hpriv->phys[i]);
55 if (rc)
56 goto disable_phys;
57
58 rc = phy_power_on(hpriv->phys[i]);
59 if (rc) {
60 phy_exit(hpriv->phys[i]);
61 goto disable_phys;
62 }
63 }
64
65 return 0;
66
67disable_phys:
68 while (--i >= 0) {
69 phy_power_off(hpriv->phys[i]);
70 phy_exit(hpriv->phys[i]);
71 }
72 return rc;
73}
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020074
75/**
76 * ahci_platform_disable_phys - Disable PHYs
77 * @hpriv: host private area to store config values
78 *
79 * This function disables all PHYs found in hpriv->phys.
80 */
Fabio Estevam6bb86fe2014-08-30 16:39:09 -030081static void ahci_platform_disable_phys(struct ahci_host_priv *hpriv)
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020082{
83 int i;
84
85 for (i = 0; i < hpriv->nports; i++) {
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020086 phy_power_off(hpriv->phys[i]);
87 phy_exit(hpriv->phys[i]);
88 }
89}
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +020090
91/**
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +010092 * ahci_platform_enable_clks - Enable platform clocks
93 * @hpriv: host private area to store config values
94 *
95 * This function enables all the clks found in hpriv->clks, starting at
96 * index 0. If any clk fails to enable it disables all the clks already
97 * enabled in reverse order, and then returns an error.
98 *
99 * RETURNS:
100 * 0 on success otherwise a negative error code
101 */
102int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
103{
104 int c, rc;
105
106 for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
107 rc = clk_prepare_enable(hpriv->clks[c]);
108 if (rc)
109 goto disable_unprepare_clk;
110 }
111 return 0;
112
113disable_unprepare_clk:
114 while (--c >= 0)
115 clk_disable_unprepare(hpriv->clks[c]);
116 return rc;
117}
118EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
119
120/**
121 * ahci_platform_disable_clks - Disable platform clocks
122 * @hpriv: host private area to store config values
123 *
124 * This function disables all the clks found in hpriv->clks, in reverse
125 * order of ahci_platform_enable_clks (starting at the end of the array).
126 */
127void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
128{
129 int c;
130
131 for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
132 if (hpriv->clks[c])
133 clk_disable_unprepare(hpriv->clks[c]);
134}
135EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
136
137/**
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100138 * ahci_platform_enable_regulators - Enable regulators
139 * @hpriv: host private area to store config values
140 *
141 * This function enables all the regulators found in
142 * hpriv->target_pwrs, if any. If a regulator fails to be enabled, it
143 * disables all the regulators already enabled in reverse order and
144 * returns an error.
145 *
146 * RETURNS:
147 * 0 on success otherwise a negative error code
148 */
149int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv)
150{
151 int rc, i;
152
153 for (i = 0; i < hpriv->nports; i++) {
154 if (!hpriv->target_pwrs[i])
155 continue;
156
157 rc = regulator_enable(hpriv->target_pwrs[i]);
158 if (rc)
159 goto disable_target_pwrs;
160 }
161
162 return 0;
163
164disable_target_pwrs:
165 while (--i >= 0)
166 if (hpriv->target_pwrs[i])
167 regulator_disable(hpriv->target_pwrs[i]);
168
169 return rc;
170}
171EXPORT_SYMBOL_GPL(ahci_platform_enable_regulators);
172
173/**
174 * ahci_platform_disable_regulators - Disable regulators
175 * @hpriv: host private area to store config values
176 *
177 * This function disables all regulators found in hpriv->target_pwrs.
178 */
179void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv)
180{
181 int i;
182
183 for (i = 0; i < hpriv->nports; i++) {
184 if (!hpriv->target_pwrs[i])
185 continue;
186 regulator_disable(hpriv->target_pwrs[i]);
187 }
188}
189EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators);
190/**
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100191 * ahci_platform_enable_resources - Enable platform resources
192 * @hpriv: host private area to store config values
193 *
194 * This function enables all ahci_platform managed resources in the
195 * following order:
196 * 1) Regulator
197 * 2) Clocks (through ahci_platform_enable_clks)
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200198 * 3) Phys
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100199 *
200 * If resource enabling fails at any point the previous enabled resources
201 * are disabled in reverse order.
202 *
203 * RETURNS:
204 * 0 on success otherwise a negative error code
205 */
206int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
207{
208 int rc;
209
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100210 rc = ahci_platform_enable_regulators(hpriv);
211 if (rc)
212 return rc;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100213
214 rc = ahci_platform_enable_clks(hpriv);
215 if (rc)
216 goto disable_regulator;
217
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200218 rc = ahci_platform_enable_phys(hpriv);
219 if (rc)
220 goto disable_clks;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100221
222 return 0;
223
224disable_clks:
225 ahci_platform_disable_clks(hpriv);
226
227disable_regulator:
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100228 ahci_platform_disable_regulators(hpriv);
229
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100230 return rc;
231}
232EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
233
234/**
235 * ahci_platform_disable_resources - Disable platform resources
236 * @hpriv: host private area to store config values
237 *
238 * This function disables all ahci_platform managed resources in the
239 * following order:
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200240 * 1) Phys
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100241 * 2) Clocks (through ahci_platform_disable_clks)
242 * 3) Regulator
243 */
244void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
245{
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200246 ahci_platform_disable_phys(hpriv);
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100247
248 ahci_platform_disable_clks(hpriv);
249
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100250 ahci_platform_disable_regulators(hpriv);
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100251}
252EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
253
254static void ahci_platform_put_resources(struct device *dev, void *res)
255{
256 struct ahci_host_priv *hpriv = res;
257 int c;
258
259 if (hpriv->got_runtime_pm) {
260 pm_runtime_put_sync(dev);
261 pm_runtime_disable(dev);
262 }
263
264 for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
265 clk_put(hpriv->clks[c]);
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100266 /*
267 * The regulators are tied to child node device and not to the
268 * SATA device itself. So we can't use devm for automatically
269 * releasing them. We have to do it manually here.
270 */
271 for (c = 0; c < hpriv->nports; c++)
272 if (hpriv->target_pwrs && hpriv->target_pwrs[c])
273 regulator_put(hpriv->target_pwrs[c]);
274
Thierry Reding55294152015-01-21 11:50:52 +0100275 kfree(hpriv->target_pwrs);
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100276}
277
278static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
279 struct device *dev, struct device_node *node)
280{
281 int rc;
282
283 hpriv->phys[port] = devm_of_phy_get(dev, node, NULL);
284
285 if (!IS_ERR(hpriv->phys[port]))
286 return 0;
287
288 rc = PTR_ERR(hpriv->phys[port]);
289 switch (rc) {
290 case -ENOSYS:
291 /* No PHY support. Check if PHY is required. */
292 if (of_find_property(node, "phys", NULL)) {
293 dev_err(dev,
294 "couldn't get PHY in node %s: ENOSYS\n",
295 node->name);
296 break;
297 }
298 case -ENODEV:
299 /* continue normally */
300 hpriv->phys[port] = NULL;
301 rc = 0;
302 break;
303
304 default:
305 dev_err(dev,
306 "couldn't get PHY in node %s: %d\n",
307 node->name, rc);
308
309 break;
310 }
311
312 return rc;
313}
314
315static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
316 struct device *dev)
317{
318 struct regulator *target_pwr;
319 int rc = 0;
320
321 target_pwr = regulator_get_optional(dev, "target");
322
323 if (!IS_ERR(target_pwr))
324 hpriv->target_pwrs[port] = target_pwr;
325 else
326 rc = PTR_ERR(target_pwr);
327
328 return rc;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100329}
330
331/**
332 * ahci_platform_get_resources - Get platform resources
333 * @pdev: platform device to get resources for
334 *
335 * This function allocates an ahci_host_priv struct, and gets the following
336 * resources, storing a reference to them inside the returned struct:
337 *
338 * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
339 * 2) regulator for controlling the targets power (optional)
340 * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
341 * or for non devicetree enabled platforms a single clock
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200342 * 4) phys (optional)
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100343 *
344 * RETURNS:
345 * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
346 */
347struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
348{
349 struct device *dev = &pdev->dev;
350 struct ahci_host_priv *hpriv;
351 struct clk *clk;
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200352 struct device_node *child;
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100353 int i, sz, enabled_ports = 0, rc = -ENOMEM, child_nodes;
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200354 u32 mask_port_map = 0;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100355
356 if (!devres_open_group(dev, NULL, GFP_KERNEL))
357 return ERR_PTR(-ENOMEM);
358
359 hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
360 GFP_KERNEL);
361 if (!hpriv)
362 goto err_out;
363
364 devres_add(dev, hpriv);
365
366 hpriv->mmio = devm_ioremap_resource(dev,
367 platform_get_resource(pdev, IORESOURCE_MEM, 0));
368 if (IS_ERR(hpriv->mmio)) {
369 dev_err(dev, "no mmio space\n");
370 rc = PTR_ERR(hpriv->mmio);
371 goto err_out;
372 }
373
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100374 for (i = 0; i < AHCI_MAX_CLKS; i++) {
375 /*
376 * For now we must use clk_get(dev, NULL) for the first clock,
377 * because some platforms (da850, spear13xx) are not yet
378 * converted to use devicetree for clocks. For new platforms
379 * this is equivalent to of_clk_get(dev->of_node, 0).
380 */
381 if (i == 0)
382 clk = clk_get(dev, NULL);
383 else
384 clk = of_clk_get(dev->of_node, i);
385
386 if (IS_ERR(clk)) {
387 rc = PTR_ERR(clk);
388 if (rc == -EPROBE_DEFER)
389 goto err_out;
390 break;
391 }
392 hpriv->clks[i] = clk;
393 }
394
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100395 hpriv->nports = child_nodes = of_get_child_count(dev->of_node);
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200396
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100397 /*
398 * If no sub-node was found, we still need to set nports to
399 * one in order to be able to use the
400 * ahci_platform_[en|dis]able_[phys|regulators] functions.
401 */
402 if (!child_nodes)
403 hpriv->nports = 1;
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200404
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100405 sz = hpriv->nports * sizeof(*hpriv->phys);
406 hpriv->phys = devm_kzalloc(dev, sz, GFP_KERNEL);
407 if (!hpriv->phys) {
408 rc = -ENOMEM;
409 goto err_out;
410 }
411 sz = hpriv->nports * sizeof(*hpriv->target_pwrs);
Thierry Reding55294152015-01-21 11:50:52 +0100412 hpriv->target_pwrs = kzalloc(sz, GFP_KERNEL);
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100413 if (!hpriv->target_pwrs) {
414 rc = -ENOMEM;
415 goto err_out;
416 }
417
418 if (child_nodes) {
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200419 for_each_child_of_node(dev->of_node, child) {
420 u32 port;
Guenter Roeckf627cfde2015-01-31 10:36:22 -0800421 struct platform_device *port_dev __maybe_unused;
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200422
423 if (!of_device_is_available(child))
424 continue;
425
426 if (of_property_read_u32(child, "reg", &port)) {
427 rc = -EINVAL;
Mikko Perttunenacbd5732014-06-17 15:07:55 +0300428 goto err_out;
429 }
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100430
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200431 if (port >= hpriv->nports) {
432 dev_warn(dev, "invalid port number %d\n", port);
433 continue;
434 }
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200435 mask_port_map |= BIT(port);
436
Guenter Roeckf627cfde2015-01-31 10:36:22 -0800437#ifdef CONFIG_OF_ADDRESS
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100438 of_platform_device_create(child, NULL, NULL);
439
440 port_dev = of_find_device_by_node(child);
441
442 if (port_dev) {
443 rc = ahci_platform_get_regulator(hpriv, port,
444 &port_dev->dev);
445 if (rc == -EPROBE_DEFER)
446 goto err_out;
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200447 }
Guenter Roeckf627cfde2015-01-31 10:36:22 -0800448#endif
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200449
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100450 rc = ahci_platform_get_phy(hpriv, port, dev, child);
451 if (rc)
452 goto err_out;
453
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200454 enabled_ports++;
455 }
456 if (!enabled_ports) {
457 dev_warn(dev, "No port enabled\n");
458 rc = -ENODEV;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100459 goto err_out;
460 }
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200461
462 if (!hpriv->mask_port_map)
463 hpriv->mask_port_map = mask_port_map;
464 } else {
465 /*
466 * If no sub-node was found, keep this for device tree
467 * compatibility
468 */
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100469 rc = ahci_platform_get_phy(hpriv, 0, dev, dev->of_node);
470 if (rc)
471 goto err_out;
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200472
Gregory CLEMENTc7d7dde2015-01-15 15:09:37 +0100473 rc = ahci_platform_get_regulator(hpriv, 0, dev);
474 if (rc == -EPROBE_DEFER)
475 goto err_out;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100476 }
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100477 pm_runtime_enable(dev);
478 pm_runtime_get_sync(dev);
479 hpriv->got_runtime_pm = true;
480
481 devres_remove_group(dev, NULL);
482 return hpriv;
483
484err_out:
485 devres_release_group(dev, NULL);
486 return ERR_PTR(rc);
487}
488EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
489
490/**
491 * ahci_platform_init_host - Bring up an ahci-platform host
492 * @pdev: platform device pointer for the host
493 * @hpriv: ahci-host private data for the host
494 * @pi_template: template for the ata_port_info to use
Akinobu Mita018d5ef2015-01-29 08:30:29 +0900495 * @sht: scsi_host_template to use when registering
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100496 *
497 * This function does all the usual steps needed to bring up an
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200498 * ahci-platform host, note any necessary resources (ie clks, phys, etc.)
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100499 * must be initialized / enabled before calling this.
500 *
501 * RETURNS:
502 * 0 on success otherwise a negative error code
503 */
504int ahci_platform_init_host(struct platform_device *pdev,
505 struct ahci_host_priv *hpriv,
Akinobu Mita018d5ef2015-01-29 08:30:29 +0900506 const struct ata_port_info *pi_template,
507 struct scsi_host_template *sht)
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100508{
509 struct device *dev = &pdev->dev;
510 struct ata_port_info pi = *pi_template;
511 const struct ata_port_info *ppi[] = { &pi, NULL };
512 struct ata_host *host;
513 int i, irq, n_ports, rc;
514
515 irq = platform_get_irq(pdev, 0);
516 if (irq <= 0) {
Thomas Petazzoni088c77a2017-05-16 14:06:12 +0200517 if (irq != -EPROBE_DEFER)
518 dev_err(dev, "no irq\n");
519 return irq;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100520 }
521
Robert Richter21bfd1a2015-05-31 13:55:18 +0200522 hpriv->irq = irq;
523
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100524 /* prepare host */
Thierry Redingc4121c62014-08-01 16:30:37 +0200525 pi.private_data = (void *)(unsigned long)hpriv->flags;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100526
Antoine Ténart725c7b52014-07-30 20:13:56 +0200527 ahci_save_initial_config(dev, hpriv);
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100528
529 if (hpriv->cap & HOST_CAP_NCQ)
530 pi.flags |= ATA_FLAG_NCQ;
531
532 if (hpriv->cap & HOST_CAP_PMP)
533 pi.flags |= ATA_FLAG_PMP;
534
535 ahci_set_em_messages(hpriv, &pi);
536
537 /* CAP.NP sometimes indicate the index of the last enabled
538 * port, at other times, that of the last possible port, so
539 * determining the maximum port number requires looking at
540 * both CAP.NP and port_map.
541 */
542 n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
543
544 host = ata_host_alloc_pinfo(dev, ppi, n_ports);
545 if (!host)
546 return -ENOMEM;
547
548 host->private_data = hpriv;
549
550 if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
551 host->flags |= ATA_HOST_PARALLEL_SCAN;
552 else
553 dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
554
555 if (pi.flags & ATA_FLAG_EM)
556 ahci_reset_em(host);
557
558 for (i = 0; i < host->n_ports; i++) {
559 struct ata_port *ap = host->ports[i];
560
561 ata_port_desc(ap, "mmio %pR",
562 platform_get_resource(pdev, IORESOURCE_MEM, 0));
563 ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
564
565 /* set enclosure management message type */
566 if (ap->flags & ATA_FLAG_EM)
567 ap->em_message_type = hpriv->em_msg_type;
568
569 /* disabled/not-implemented port */
570 if (!(hpriv->port_map & (1 << i)))
571 ap->ops = &ata_dummy_port_ops;
572 }
573
Suravee Suthikulpanitcc7a9e22014-06-12 12:40:23 -0500574 if (hpriv->cap & HOST_CAP_64) {
575 rc = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
576 if (rc) {
577 rc = dma_coerce_mask_and_coherent(dev,
578 DMA_BIT_MASK(32));
579 if (rc) {
580 dev_err(dev, "Failed to enable 64-bit DMA.\n");
581 return rc;
582 }
583 dev_warn(dev, "Enable 32-bit DMA instead of 64-bit.\n");
584 }
585 }
586
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100587 rc = ahci_reset_controller(host);
588 if (rc)
589 return rc;
590
591 ahci_init_controller(host);
592 ahci_print_info(host, "platform");
593
Robert Richter21bfd1a2015-05-31 13:55:18 +0200594 return ahci_host_activate(host, sht);
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100595}
596EXPORT_SYMBOL_GPL(ahci_platform_init_host);
597
598static void ahci_host_stop(struct ata_host *host)
599{
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100600 struct ahci_host_priv *hpriv = host->private_data;
601
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100602 ahci_platform_disable_resources(hpriv);
603}
604
605#ifdef CONFIG_PM_SLEEP
606/**
607 * ahci_platform_suspend_host - Suspend an ahci-platform host
608 * @dev: device pointer for the host
609 *
610 * This function does all the usual steps needed to suspend an
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200611 * ahci-platform host, note any necessary resources (ie clks, phys, etc.)
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100612 * must be disabled after calling this.
613 *
614 * RETURNS:
615 * 0 on success otherwise a negative error code
616 */
617int ahci_platform_suspend_host(struct device *dev)
618{
619 struct ata_host *host = dev_get_drvdata(dev);
620 struct ahci_host_priv *hpriv = host->private_data;
621 void __iomem *mmio = hpriv->mmio;
622 u32 ctl;
623
624 if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
625 dev_err(dev, "firmware update required for suspend/resume\n");
626 return -EIO;
627 }
628
629 /*
630 * AHCI spec rev1.1 section 8.3.3:
631 * Software must disable interrupts prior to requesting a
632 * transition of the HBA to D3 state.
633 */
634 ctl = readl(mmio + HOST_CTL);
635 ctl &= ~HOST_IRQ_EN;
636 writel(ctl, mmio + HOST_CTL);
637 readl(mmio + HOST_CTL); /* flush */
638
639 return ata_host_suspend(host, PMSG_SUSPEND);
640}
641EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
642
643/**
644 * ahci_platform_resume_host - Resume an ahci-platform host
645 * @dev: device pointer for the host
646 *
647 * This function does all the usual steps needed to resume an ahci-platform
Antoine Ténartb1a9edbd2014-07-30 20:13:57 +0200648 * host, note any necessary resources (ie clks, phys, etc.) must be
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100649 * initialized / enabled before calling this.
650 *
651 * RETURNS:
652 * 0 on success otherwise a negative error code
653 */
654int ahci_platform_resume_host(struct device *dev)
655{
656 struct ata_host *host = dev_get_drvdata(dev);
657 int rc;
658
659 if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
660 rc = ahci_reset_controller(host);
661 if (rc)
662 return rc;
663
664 ahci_init_controller(host);
665 }
666
667 ata_host_resume(host);
668
669 return 0;
670}
671EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
672
673/**
674 * ahci_platform_suspend - Suspend an ahci-platform device
675 * @dev: the platform device to suspend
676 *
677 * This function suspends the host associated with the device, followed by
678 * disabling all the resources of the device.
679 *
680 * RETURNS:
681 * 0 on success otherwise a negative error code
682 */
683int ahci_platform_suspend(struct device *dev)
684{
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100685 struct ata_host *host = dev_get_drvdata(dev);
686 struct ahci_host_priv *hpriv = host->private_data;
687 int rc;
688
689 rc = ahci_platform_suspend_host(dev);
690 if (rc)
691 return rc;
692
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100693 ahci_platform_disable_resources(hpriv);
694
695 return 0;
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100696}
697EXPORT_SYMBOL_GPL(ahci_platform_suspend);
698
699/**
700 * ahci_platform_resume - Resume an ahci-platform device
701 * @dev: the platform device to resume
702 *
703 * This function enables all the resources of the device followed by
704 * resuming the host associated with the device.
705 *
706 * RETURNS:
707 * 0 on success otherwise a negative error code
708 */
709int ahci_platform_resume(struct device *dev)
710{
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100711 struct ata_host *host = dev_get_drvdata(dev);
712 struct ahci_host_priv *hpriv = host->private_data;
713 int rc;
714
715 rc = ahci_platform_enable_resources(hpriv);
716 if (rc)
717 return rc;
718
Bartlomiej Zolnierkiewiczfd990552014-03-25 19:51:39 +0100719 rc = ahci_platform_resume_host(dev);
720 if (rc)
721 goto disable_resources;
722
723 /* We resumed so update PM runtime state */
724 pm_runtime_disable(dev);
725 pm_runtime_set_active(dev);
726 pm_runtime_enable(dev);
727
728 return 0;
729
730disable_resources:
731 ahci_platform_disable_resources(hpriv);
732
733 return rc;
734}
735EXPORT_SYMBOL_GPL(ahci_platform_resume);
736#endif
737
738MODULE_DESCRIPTION("AHCI SATA platform library");
739MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
740MODULE_LICENSE("GPL");