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1/*
2 * Copyright 2012 Freescale Semiconductor, Inc.
3 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
4 * on behalf of DENX Software Engineering GmbH
5 *
6 * The code contained herein is licensed under the GNU General Public
7 * License. You may obtain a copy of the GNU General Public License
8 * Version 2 or later at the following locations:
9 *
10 * http://www.opensource.org/licenses/gpl-license.html
11 * http://www.gnu.org/copyleft/gpl.html
12 */
13
14#include <linux/module.h>
15#include <linux/of_platform.h>
16#include <linux/of_gpio.h>
17#include <linux/platform_device.h>
18#include <linux/pm_runtime.h>
19#include <linux/dma-mapping.h>
20#include <linux/usb/chipidea.h>
21#include <linux/usb/of.h>
22#include <linux/clk.h>
23
24#include "ci.h"
25#include "ci_hdrc_imx.h"
26
27struct ci_hdrc_imx_platform_flag {
28 unsigned int flags;
29 bool runtime_pm;
30};
31
32static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
33 .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
34 CI_HDRC_DISABLE_STREAMING,
35};
36
37static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
38 CI_HDRC_DISABLE_STREAMING,
39};
40
41static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
42 .flags = CI_HDRC_IMX28_WRITE_FIX |
43 CI_HDRC_TURN_VBUS_EARLY_ON |
44 CI_HDRC_DISABLE_STREAMING,
45};
46
47static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
48 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
49 CI_HDRC_TURN_VBUS_EARLY_ON |
50 CI_HDRC_DISABLE_STREAMING,
51};
52
53static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
54 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
55 CI_HDRC_TURN_VBUS_EARLY_ON |
56 CI_HDRC_DISABLE_HOST_STREAMING,
57};
58
59static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
60 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
61 CI_HDRC_TURN_VBUS_EARLY_ON |
62 CI_HDRC_DISABLE_HOST_STREAMING,
63};
64
65static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
66 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
67 CI_HDRC_TURN_VBUS_EARLY_ON,
68};
69
70static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
71 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
72};
73
74static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
75 { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
76 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
77 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
78 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
79 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
80 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
81 { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
82 { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
83 { /* sentinel */ }
84};
85MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
86
87struct ci_hdrc_imx_data {
88 struct usb_phy *phy;
89 struct platform_device *ci_pdev;
90 struct clk *clk;
91 struct imx_usbmisc_data *usbmisc_data;
92 bool supports_runtime_pm;
93 bool in_lpm;
94 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
95 bool need_three_clks;
96 struct clk *clk_ipg;
97 struct clk *clk_ahb;
98 struct clk *clk_per;
99 /* --------------------------------- */
100};
101
102/* Common functions shared by usbmisc drivers */
103
104static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
105{
106 struct platform_device *misc_pdev;
107 struct device_node *np = dev->of_node;
108 struct of_phandle_args args;
109 struct imx_usbmisc_data *data;
110 int ret;
111
112 /*
113 * In case the fsl,usbmisc property is not present this device doesn't
114 * need usbmisc. Return NULL (which is no error here)
115 */
116 if (!of_get_property(np, "fsl,usbmisc", NULL))
117 return NULL;
118
119 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
120 if (!data)
121 return ERR_PTR(-ENOMEM);
122
123 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
124 0, &args);
125 if (ret) {
126 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
127 ret);
128 return ERR_PTR(ret);
129 }
130
131 data->index = args.args[0];
132
133 misc_pdev = of_find_device_by_node(args.np);
134 of_node_put(args.np);
135
136 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
137 return ERR_PTR(-EPROBE_DEFER);
138
139 data->dev = &misc_pdev->dev;
140
141 if (of_find_property(np, "disable-over-current", NULL))
142 data->disable_oc = 1;
143
144 if (of_find_property(np, "over-current-active-high", NULL))
145 data->oc_polarity = 1;
146
147 if (of_find_property(np, "external-vbus-divider", NULL))
148 data->evdo = 1;
149
150 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
151 data->ulpi = 1;
152
153 return data;
154}
155
156/* End of common functions shared by usbmisc drivers*/
157static int imx_get_clks(struct device *dev)
158{
159 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
160 int ret = 0;
161
162 data->clk_ipg = devm_clk_get(dev, "ipg");
163 if (IS_ERR(data->clk_ipg)) {
164 /* If the platform only needs one clocks */
165 data->clk = devm_clk_get(dev, NULL);
166 if (IS_ERR(data->clk)) {
167 ret = PTR_ERR(data->clk);
168 dev_err(dev,
169 "Failed to get clks, err=%ld,%ld\n",
170 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
171 return ret;
172 }
173 return ret;
174 }
175
176 data->clk_ahb = devm_clk_get(dev, "ahb");
177 if (IS_ERR(data->clk_ahb)) {
178 ret = PTR_ERR(data->clk_ahb);
179 dev_err(dev,
180 "Failed to get ahb clock, err=%d\n", ret);
181 return ret;
182 }
183
184 data->clk_per = devm_clk_get(dev, "per");
185 if (IS_ERR(data->clk_per)) {
186 ret = PTR_ERR(data->clk_per);
187 dev_err(dev,
188 "Failed to get per clock, err=%d\n", ret);
189 return ret;
190 }
191
192 data->need_three_clks = true;
193 return ret;
194}
195
196static int imx_prepare_enable_clks(struct device *dev)
197{
198 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
199 int ret = 0;
200
201 if (data->need_three_clks) {
202 ret = clk_prepare_enable(data->clk_ipg);
203 if (ret) {
204 dev_err(dev,
205 "Failed to prepare/enable ipg clk, err=%d\n",
206 ret);
207 return ret;
208 }
209
210 ret = clk_prepare_enable(data->clk_ahb);
211 if (ret) {
212 dev_err(dev,
213 "Failed to prepare/enable ahb clk, err=%d\n",
214 ret);
215 clk_disable_unprepare(data->clk_ipg);
216 return ret;
217 }
218
219 ret = clk_prepare_enable(data->clk_per);
220 if (ret) {
221 dev_err(dev,
222 "Failed to prepare/enable per clk, err=%d\n",
223 ret);
224 clk_disable_unprepare(data->clk_ahb);
225 clk_disable_unprepare(data->clk_ipg);
226 return ret;
227 }
228 } else {
229 ret = clk_prepare_enable(data->clk);
230 if (ret) {
231 dev_err(dev,
232 "Failed to prepare/enable clk, err=%d\n",
233 ret);
234 return ret;
235 }
236 }
237
238 return ret;
239}
240
241static void imx_disable_unprepare_clks(struct device *dev)
242{
243 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
244
245 if (data->need_three_clks) {
246 clk_disable_unprepare(data->clk_per);
247 clk_disable_unprepare(data->clk_ahb);
248 clk_disable_unprepare(data->clk_ipg);
249 } else {
250 clk_disable_unprepare(data->clk);
251 }
252}
253
254static int ci_hdrc_imx_probe(struct platform_device *pdev)
255{
256 struct ci_hdrc_imx_data *data;
257 struct ci_hdrc_platform_data pdata = {
258 .name = dev_name(&pdev->dev),
259 .capoffset = DEF_CAPOFFSET,
260 };
261 int ret;
262 const struct of_device_id *of_id;
263 const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
264
265 of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
266 if (!of_id)
267 return -ENODEV;
268
269 imx_platform_flag = of_id->data;
270
271 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
272 if (!data)
273 return -ENOMEM;
274
275 platform_set_drvdata(pdev, data);
276 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
277 if (IS_ERR(data->usbmisc_data))
278 return PTR_ERR(data->usbmisc_data);
279
280 ret = imx_get_clks(&pdev->dev);
281 if (ret)
282 return ret;
283
284 ret = imx_prepare_enable_clks(&pdev->dev);
285 if (ret)
286 return ret;
287
288 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
289 if (IS_ERR(data->phy)) {
290 ret = PTR_ERR(data->phy);
291 /* Return -EINVAL if no usbphy is available */
292 if (ret == -ENODEV)
293 ret = -EINVAL;
294 goto err_clk;
295 }
296
297 pdata.usb_phy = data->phy;
298 pdata.flags |= imx_platform_flag->flags;
299 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
300 data->supports_runtime_pm = true;
301
302 ret = imx_usbmisc_init(data->usbmisc_data);
303 if (ret) {
304 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
305 goto err_clk;
306 }
307
308 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
309 pdev->resource, pdev->num_resources,
310 &pdata);
311 if (IS_ERR(data->ci_pdev)) {
312 ret = PTR_ERR(data->ci_pdev);
313 if (ret != -EPROBE_DEFER)
314 dev_err(&pdev->dev,
315 "ci_hdrc_add_device failed, err=%d\n", ret);
316 goto err_clk;
317 }
318
319 ret = imx_usbmisc_init_post(data->usbmisc_data);
320 if (ret) {
321 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
322 goto disable_device;
323 }
324
325 if (data->supports_runtime_pm) {
326 pm_runtime_set_active(&pdev->dev);
327 pm_runtime_enable(&pdev->dev);
328 }
329
330 device_set_wakeup_capable(&pdev->dev, true);
331
332 return 0;
333
334disable_device:
335 ci_hdrc_remove_device(data->ci_pdev);
336err_clk:
337 imx_disable_unprepare_clks(&pdev->dev);
338 return ret;
339}
340
341static int ci_hdrc_imx_remove(struct platform_device *pdev)
342{
343 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
344
345 if (data->supports_runtime_pm) {
346 pm_runtime_get_sync(&pdev->dev);
347 pm_runtime_disable(&pdev->dev);
348 pm_runtime_put_noidle(&pdev->dev);
349 }
350 ci_hdrc_remove_device(data->ci_pdev);
351 imx_disable_unprepare_clks(&pdev->dev);
352
353 return 0;
354}
355
356static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
357{
358 ci_hdrc_imx_remove(pdev);
359}
360
361#ifdef CONFIG_PM
362static int imx_controller_suspend(struct device *dev)
363{
364 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
365
366 dev_dbg(dev, "at %s\n", __func__);
367
368 imx_disable_unprepare_clks(dev);
369 data->in_lpm = true;
370
371 return 0;
372}
373
374static int imx_controller_resume(struct device *dev)
375{
376 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
377 int ret = 0;
378
379 dev_dbg(dev, "at %s\n", __func__);
380
381 if (!data->in_lpm) {
382 WARN_ON(1);
383 return 0;
384 }
385
386 ret = imx_prepare_enable_clks(dev);
387 if (ret)
388 return ret;
389
390 data->in_lpm = false;
391
392 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
393 if (ret) {
394 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
395 goto clk_disable;
396 }
397
398 return 0;
399
400clk_disable:
401 imx_disable_unprepare_clks(dev);
402 return ret;
403}
404
405#ifdef CONFIG_PM_SLEEP
406static int ci_hdrc_imx_suspend(struct device *dev)
407{
408 int ret;
409
410 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
411
412 if (data->in_lpm)
413 /* The core's suspend doesn't run */
414 return 0;
415
416 if (device_may_wakeup(dev)) {
417 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
418 if (ret) {
419 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
420 ret);
421 return ret;
422 }
423 }
424
425 return imx_controller_suspend(dev);
426}
427
428static int ci_hdrc_imx_resume(struct device *dev)
429{
430 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
431 int ret;
432
433 ret = imx_controller_resume(dev);
434 if (!ret && data->supports_runtime_pm) {
435 pm_runtime_disable(dev);
436 pm_runtime_set_active(dev);
437 pm_runtime_enable(dev);
438 }
439
440 return ret;
441}
442#endif /* CONFIG_PM_SLEEP */
443
444static int ci_hdrc_imx_runtime_suspend(struct device *dev)
445{
446 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
447 int ret;
448
449 if (data->in_lpm) {
450 WARN_ON(1);
451 return 0;
452 }
453
454 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
455 if (ret) {
456 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
457 return ret;
458 }
459
460 return imx_controller_suspend(dev);
461}
462
463static int ci_hdrc_imx_runtime_resume(struct device *dev)
464{
465 return imx_controller_resume(dev);
466}
467
468#endif /* CONFIG_PM */
469
470static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
471 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
472 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
473 ci_hdrc_imx_runtime_resume, NULL)
474};
475static struct platform_driver ci_hdrc_imx_driver = {
476 .probe = ci_hdrc_imx_probe,
477 .remove = ci_hdrc_imx_remove,
478 .shutdown = ci_hdrc_imx_shutdown,
479 .driver = {
480 .name = "imx_usb",
481 .of_match_table = ci_hdrc_imx_dt_ids,
482 .pm = &ci_hdrc_imx_pm_ops,
483 },
484};
485
486module_platform_driver(ci_hdrc_imx_driver);
487
488MODULE_ALIAS("platform:imx-usb");
489MODULE_LICENSE("GPL v2");
490MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
491MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
492MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");