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