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8#include <linux/module.h>
9#include <linux/of_platform.h>
10#include <linux/of_gpio.h>
11#include <linux/platform_device.h>
12#include <linux/pm_runtime.h>
13#include <linux/dma-mapping.h>
14#include <linux/usb/chipidea.h>
15#include <linux/usb/of.h>
16#include <linux/clk.h>
17
18#include "ci.h"
19#include "ci_hdrc_imx.h"
20
21struct ci_hdrc_imx_platform_flag {
22 unsigned int flags;
23};
24
25static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
26 .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
27 CI_HDRC_DISABLE_STREAMING,
28};
29
30static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
31 .flags = CI_HDRC_DISABLE_STREAMING,
32};
33
34static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
35 .flags = CI_HDRC_IMX28_WRITE_FIX |
36 CI_HDRC_TURN_VBUS_EARLY_ON |
37 CI_HDRC_DISABLE_STREAMING,
38};
39
40static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
41 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
42 CI_HDRC_TURN_VBUS_EARLY_ON |
43 CI_HDRC_DISABLE_STREAMING,
44};
45
46static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
47 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
48 CI_HDRC_TURN_VBUS_EARLY_ON |
49 CI_HDRC_DISABLE_HOST_STREAMING,
50};
51
52static const struct ci_hdrc_imx_platform_flag imx6sx_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 imx6ul_usb_data = {
59 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
60 CI_HDRC_TURN_VBUS_EARLY_ON,
61};
62
63static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
64 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
65};
66
67static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
68 { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
69 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
70 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
71 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
72 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
73 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
74 { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
75 { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
76 { }
77};
78MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
79
80struct ci_hdrc_imx_data {
81 struct usb_phy *phy;
82 struct platform_device *ci_pdev;
83 struct clk *clk;
84 struct imx_usbmisc_data *usbmisc_data;
85 bool supports_runtime_pm;
86 bool override_phy_control;
87 bool in_lpm;
88
89 bool need_three_clks;
90 struct clk *clk_ipg;
91 struct clk *clk_ahb;
92 struct clk *clk_per;
93
94};
95
96
97
98static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
99{
100 struct platform_device *misc_pdev;
101 struct device_node *np = dev->of_node;
102 struct of_phandle_args args;
103 struct imx_usbmisc_data *data;
104 int ret;
105
106
107
108
109
110 if (!of_get_property(np, "fsl,usbmisc", NULL))
111 return NULL;
112
113 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
114 if (!data)
115 return ERR_PTR(-ENOMEM);
116
117 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
118 0, &args);
119 if (ret) {
120 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
121 ret);
122 return ERR_PTR(ret);
123 }
124
125 data->index = args.args[0];
126
127 misc_pdev = of_find_device_by_node(args.np);
128 of_node_put(args.np);
129
130 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
131 return ERR_PTR(-EPROBE_DEFER);
132
133 data->dev = &misc_pdev->dev;
134
135 if (of_find_property(np, "disable-over-current", NULL))
136 data->disable_oc = 1;
137
138 if (of_find_property(np, "over-current-active-high", NULL))
139 data->oc_polarity = 1;
140
141 if (of_find_property(np, "external-vbus-divider", NULL))
142 data->evdo = 1;
143
144 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
145 data->ulpi = 1;
146
147 return data;
148}
149
150
151static int imx_get_clks(struct device *dev)
152{
153 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
154 int ret = 0;
155
156 data->clk_ipg = devm_clk_get(dev, "ipg");
157 if (IS_ERR(data->clk_ipg)) {
158
159 data->clk = devm_clk_get(dev, NULL);
160 if (IS_ERR(data->clk)) {
161 ret = PTR_ERR(data->clk);
162 dev_err(dev,
163 "Failed to get clks, err=%ld,%ld\n",
164 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
165 return ret;
166 }
167 return ret;
168 }
169
170 data->clk_ahb = devm_clk_get(dev, "ahb");
171 if (IS_ERR(data->clk_ahb)) {
172 ret = PTR_ERR(data->clk_ahb);
173 dev_err(dev,
174 "Failed to get ahb clock, err=%d\n", ret);
175 return ret;
176 }
177
178 data->clk_per = devm_clk_get(dev, "per");
179 if (IS_ERR(data->clk_per)) {
180 ret = PTR_ERR(data->clk_per);
181 dev_err(dev,
182 "Failed to get per clock, err=%d\n", ret);
183 return ret;
184 }
185
186 data->need_three_clks = true;
187 return ret;
188}
189
190static int imx_prepare_enable_clks(struct device *dev)
191{
192 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
193 int ret = 0;
194
195 if (data->need_three_clks) {
196 ret = clk_prepare_enable(data->clk_ipg);
197 if (ret) {
198 dev_err(dev,
199 "Failed to prepare/enable ipg clk, err=%d\n",
200 ret);
201 return ret;
202 }
203
204 ret = clk_prepare_enable(data->clk_ahb);
205 if (ret) {
206 dev_err(dev,
207 "Failed to prepare/enable ahb clk, err=%d\n",
208 ret);
209 clk_disable_unprepare(data->clk_ipg);
210 return ret;
211 }
212
213 ret = clk_prepare_enable(data->clk_per);
214 if (ret) {
215 dev_err(dev,
216 "Failed to prepare/enable per clk, err=%d\n",
217 ret);
218 clk_disable_unprepare(data->clk_ahb);
219 clk_disable_unprepare(data->clk_ipg);
220 return ret;
221 }
222 } else {
223 ret = clk_prepare_enable(data->clk);
224 if (ret) {
225 dev_err(dev,
226 "Failed to prepare/enable clk, err=%d\n",
227 ret);
228 return ret;
229 }
230 }
231
232 return ret;
233}
234
235static void imx_disable_unprepare_clks(struct device *dev)
236{
237 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
238
239 if (data->need_three_clks) {
240 clk_disable_unprepare(data->clk_per);
241 clk_disable_unprepare(data->clk_ahb);
242 clk_disable_unprepare(data->clk_ipg);
243 } else {
244 clk_disable_unprepare(data->clk);
245 }
246}
247
248static int ci_hdrc_imx_probe(struct platform_device *pdev)
249{
250 struct ci_hdrc_imx_data *data;
251 struct ci_hdrc_platform_data pdata = {
252 .name = dev_name(&pdev->dev),
253 .capoffset = DEF_CAPOFFSET,
254 };
255 int ret;
256 const struct of_device_id *of_id;
257 const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
258 struct device_node *np = pdev->dev.of_node;
259
260 of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
261 if (!of_id)
262 return -ENODEV;
263
264 imx_platform_flag = of_id->data;
265
266 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
267 if (!data)
268 return -ENOMEM;
269
270 platform_set_drvdata(pdev, data);
271 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
272 if (IS_ERR(data->usbmisc_data))
273 return PTR_ERR(data->usbmisc_data);
274
275 ret = imx_get_clks(&pdev->dev);
276 if (ret)
277 return ret;
278
279 ret = imx_prepare_enable_clks(&pdev->dev);
280 if (ret)
281 return ret;
282
283 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
284 if (IS_ERR(data->phy)) {
285 ret = PTR_ERR(data->phy);
286
287 if (ret == -ENODEV)
288 ret = -EINVAL;
289 goto err_clk;
290 }
291
292 pdata.usb_phy = data->phy;
293
294 if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
295 of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
296 of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
297 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
298 data->override_phy_control = true;
299 usb_phy_init(pdata.usb_phy);
300 }
301
302 pdata.flags |= imx_platform_flag->flags;
303 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
304 data->supports_runtime_pm = true;
305
306 ret = imx_usbmisc_init(data->usbmisc_data);
307 if (ret) {
308 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
309 goto err_clk;
310 }
311
312 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
313 pdev->resource, pdev->num_resources,
314 &pdata);
315 if (IS_ERR(data->ci_pdev)) {
316 ret = PTR_ERR(data->ci_pdev);
317 if (ret != -EPROBE_DEFER)
318 dev_err(&pdev->dev,
319 "ci_hdrc_add_device failed, err=%d\n", ret);
320 goto err_clk;
321 }
322
323 ret = imx_usbmisc_init_post(data->usbmisc_data);
324 if (ret) {
325 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
326 goto disable_device;
327 }
328
329 if (data->supports_runtime_pm) {
330 pm_runtime_set_active(&pdev->dev);
331 pm_runtime_enable(&pdev->dev);
332 }
333
334 device_set_wakeup_capable(&pdev->dev, true);
335
336 return 0;
337
338disable_device:
339 ci_hdrc_remove_device(data->ci_pdev);
340err_clk:
341 imx_disable_unprepare_clks(&pdev->dev);
342 return ret;
343}
344
345static int ci_hdrc_imx_remove(struct platform_device *pdev)
346{
347 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
348
349 if (data->supports_runtime_pm) {
350 pm_runtime_get_sync(&pdev->dev);
351 pm_runtime_disable(&pdev->dev);
352 pm_runtime_put_noidle(&pdev->dev);
353 }
354 ci_hdrc_remove_device(data->ci_pdev);
355 if (data->override_phy_control)
356 usb_phy_shutdown(data->phy);
357 imx_disable_unprepare_clks(&pdev->dev);
358
359 return 0;
360}
361
362static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
363{
364 ci_hdrc_imx_remove(pdev);
365}
366
367#ifdef CONFIG_PM
368static int imx_controller_suspend(struct device *dev)
369{
370 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
371
372 dev_dbg(dev, "at %s\n", __func__);
373
374 imx_disable_unprepare_clks(dev);
375 data->in_lpm = true;
376
377 return 0;
378}
379
380static int imx_controller_resume(struct device *dev)
381{
382 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
383 int ret = 0;
384
385 dev_dbg(dev, "at %s\n", __func__);
386
387 if (!data->in_lpm) {
388 WARN_ON(1);
389 return 0;
390 }
391
392 ret = imx_prepare_enable_clks(dev);
393 if (ret)
394 return ret;
395
396 data->in_lpm = false;
397
398 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
399 if (ret) {
400 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
401 goto clk_disable;
402 }
403
404 return 0;
405
406clk_disable:
407 imx_disable_unprepare_clks(dev);
408 return ret;
409}
410
411#ifdef CONFIG_PM_SLEEP
412static int ci_hdrc_imx_suspend(struct device *dev)
413{
414 int ret;
415
416 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
417
418 if (data->in_lpm)
419
420 return 0;
421
422 if (device_may_wakeup(dev)) {
423 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
424 if (ret) {
425 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
426 ret);
427 return ret;
428 }
429 }
430
431 return imx_controller_suspend(dev);
432}
433
434static int ci_hdrc_imx_resume(struct device *dev)
435{
436 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
437 int ret;
438
439 ret = imx_controller_resume(dev);
440 if (!ret && data->supports_runtime_pm) {
441 pm_runtime_disable(dev);
442 pm_runtime_set_active(dev);
443 pm_runtime_enable(dev);
444 }
445
446 return ret;
447}
448#endif
449
450static int ci_hdrc_imx_runtime_suspend(struct device *dev)
451{
452 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
453 int ret;
454
455 if (data->in_lpm) {
456 WARN_ON(1);
457 return 0;
458 }
459
460 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
461 if (ret) {
462 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
463 return ret;
464 }
465
466 return imx_controller_suspend(dev);
467}
468
469static int ci_hdrc_imx_runtime_resume(struct device *dev)
470{
471 return imx_controller_resume(dev);
472}
473
474#endif
475
476static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
477 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
478 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
479 ci_hdrc_imx_runtime_resume, NULL)
480};
481static struct platform_driver ci_hdrc_imx_driver = {
482 .probe = ci_hdrc_imx_probe,
483 .remove = ci_hdrc_imx_remove,
484 .shutdown = ci_hdrc_imx_shutdown,
485 .driver = {
486 .name = "imx_usb",
487 .of_match_table = ci_hdrc_imx_dt_ids,
488 .pm = &ci_hdrc_imx_pm_ops,
489 },
490};
491
492module_platform_driver(ci_hdrc_imx_driver);
493
494MODULE_ALIAS("platform:imx-usb");
495MODULE_LICENSE("GPL v2");
496MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
497MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
498MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
499
