mm/hmm.c: remove superfluous RCU protection around radix tree lookup
[linux/fpc-iii.git] / drivers / usb / chipidea / ci_hdrc_imx.c
blobe431c5aafe356281aff15b08e3a1d3765ea56f56
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2012 Freescale Semiconductor, Inc.
4 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
5 * on behalf of DENX Software Engineering GmbH
6 */
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>
18 #include "ci.h"
19 #include "ci_hdrc_imx.h"
21 struct ci_hdrc_imx_platform_flag {
22 unsigned int flags;
25 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
26 .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
27 CI_HDRC_DISABLE_STREAMING,
30 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
31 .flags = CI_HDRC_DISABLE_STREAMING,
34 static 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,
40 static 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,
46 static 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,
52 static 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,
58 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
59 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
60 CI_HDRC_TURN_VBUS_EARLY_ON,
63 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
64 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
67 static 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 { /* sentinel */ }
78 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
80 struct 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 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
89 bool need_three_clks;
90 struct clk *clk_ipg;
91 struct clk *clk_ahb;
92 struct clk *clk_per;
93 /* --------------------------------- */
96 /* Common functions shared by usbmisc drivers */
98 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
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;
107 * In case the fsl,usbmisc property is not present this device doesn't
108 * need usbmisc. Return NULL (which is no error here)
110 if (!of_get_property(np, "fsl,usbmisc", NULL))
111 return NULL;
113 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
114 if (!data)
115 return ERR_PTR(-ENOMEM);
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);
125 data->index = args.args[0];
127 misc_pdev = of_find_device_by_node(args.np);
128 of_node_put(args.np);
130 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
131 return ERR_PTR(-EPROBE_DEFER);
133 data->dev = &misc_pdev->dev;
135 if (of_find_property(np, "disable-over-current", NULL))
136 data->disable_oc = 1;
138 if (of_find_property(np, "over-current-active-high", NULL))
139 data->oc_polarity = 1;
141 if (of_find_property(np, "external-vbus-divider", NULL))
142 data->evdo = 1;
144 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
145 data->ulpi = 1;
147 return data;
150 /* End of common functions shared by usbmisc drivers*/
151 static int imx_get_clks(struct device *dev)
153 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
154 int ret = 0;
156 data->clk_ipg = devm_clk_get(dev, "ipg");
157 if (IS_ERR(data->clk_ipg)) {
158 /* If the platform only needs one clocks */
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;
167 return ret;
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;
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;
186 data->need_three_clks = true;
187 return ret;
190 static int imx_prepare_enable_clks(struct device *dev)
192 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
193 int ret = 0;
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;
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;
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;
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;
232 return ret;
235 static void imx_disable_unprepare_clks(struct device *dev)
237 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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);
248 static int ci_hdrc_imx_probe(struct platform_device *pdev)
250 struct ci_hdrc_imx_data *data;
251 struct ci_hdrc_platform_data pdata = {
252 .name = dev_name(&pdev->dev),
253 .capoffset = DEF_CAPOFFSET,
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;
260 of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
261 if (!of_id)
262 return -ENODEV;
264 imx_platform_flag = of_id->data;
266 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
267 if (!data)
268 return -ENOMEM;
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);
275 ret = imx_get_clks(&pdev->dev);
276 if (ret)
277 return ret;
279 ret = imx_prepare_enable_clks(&pdev->dev);
280 if (ret)
281 return ret;
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 /* Return -EINVAL if no usbphy is available */
287 if (ret == -ENODEV)
288 ret = -EINVAL;
289 goto err_clk;
292 pdata.usb_phy = data->phy;
294 if (of_device_is_compatible(np, "fsl,imx53-usb") && pdata.usb_phy &&
295 of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
296 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
297 data->override_phy_control = true;
298 usb_phy_init(pdata.usb_phy);
301 pdata.flags |= imx_platform_flag->flags;
302 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
303 data->supports_runtime_pm = true;
305 ret = imx_usbmisc_init(data->usbmisc_data);
306 if (ret) {
307 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
308 goto err_clk;
311 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
312 pdev->resource, pdev->num_resources,
313 &pdata);
314 if (IS_ERR(data->ci_pdev)) {
315 ret = PTR_ERR(data->ci_pdev);
316 if (ret != -EPROBE_DEFER)
317 dev_err(&pdev->dev,
318 "ci_hdrc_add_device failed, err=%d\n", ret);
319 goto err_clk;
322 ret = imx_usbmisc_init_post(data->usbmisc_data);
323 if (ret) {
324 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
325 goto disable_device;
328 if (data->supports_runtime_pm) {
329 pm_runtime_set_active(&pdev->dev);
330 pm_runtime_enable(&pdev->dev);
333 device_set_wakeup_capable(&pdev->dev, true);
335 return 0;
337 disable_device:
338 ci_hdrc_remove_device(data->ci_pdev);
339 err_clk:
340 imx_disable_unprepare_clks(&pdev->dev);
341 return ret;
344 static int ci_hdrc_imx_remove(struct platform_device *pdev)
346 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
348 if (data->supports_runtime_pm) {
349 pm_runtime_get_sync(&pdev->dev);
350 pm_runtime_disable(&pdev->dev);
351 pm_runtime_put_noidle(&pdev->dev);
353 ci_hdrc_remove_device(data->ci_pdev);
354 if (data->override_phy_control)
355 usb_phy_shutdown(data->phy);
356 imx_disable_unprepare_clks(&pdev->dev);
358 return 0;
361 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
363 ci_hdrc_imx_remove(pdev);
366 #ifdef CONFIG_PM
367 static int imx_controller_suspend(struct device *dev)
369 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
371 dev_dbg(dev, "at %s\n", __func__);
373 imx_disable_unprepare_clks(dev);
374 data->in_lpm = true;
376 return 0;
379 static int imx_controller_resume(struct device *dev)
381 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
382 int ret = 0;
384 dev_dbg(dev, "at %s\n", __func__);
386 if (!data->in_lpm) {
387 WARN_ON(1);
388 return 0;
391 ret = imx_prepare_enable_clks(dev);
392 if (ret)
393 return ret;
395 data->in_lpm = false;
397 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
398 if (ret) {
399 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
400 goto clk_disable;
403 return 0;
405 clk_disable:
406 imx_disable_unprepare_clks(dev);
407 return ret;
410 #ifdef CONFIG_PM_SLEEP
411 static int ci_hdrc_imx_suspend(struct device *dev)
413 int ret;
415 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
417 if (data->in_lpm)
418 /* The core's suspend doesn't run */
419 return 0;
421 if (device_may_wakeup(dev)) {
422 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
423 if (ret) {
424 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
425 ret);
426 return ret;
430 return imx_controller_suspend(dev);
433 static int ci_hdrc_imx_resume(struct device *dev)
435 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
436 int ret;
438 ret = imx_controller_resume(dev);
439 if (!ret && data->supports_runtime_pm) {
440 pm_runtime_disable(dev);
441 pm_runtime_set_active(dev);
442 pm_runtime_enable(dev);
445 return ret;
447 #endif /* CONFIG_PM_SLEEP */
449 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
451 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
452 int ret;
454 if (data->in_lpm) {
455 WARN_ON(1);
456 return 0;
459 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
460 if (ret) {
461 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
462 return ret;
465 return imx_controller_suspend(dev);
468 static int ci_hdrc_imx_runtime_resume(struct device *dev)
470 return imx_controller_resume(dev);
473 #endif /* CONFIG_PM */
475 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
476 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
477 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
478 ci_hdrc_imx_runtime_resume, NULL)
480 static struct platform_driver ci_hdrc_imx_driver = {
481 .probe = ci_hdrc_imx_probe,
482 .remove = ci_hdrc_imx_remove,
483 .shutdown = ci_hdrc_imx_shutdown,
484 .driver = {
485 .name = "imx_usb",
486 .of_match_table = ci_hdrc_imx_dt_ids,
487 .pm = &ci_hdrc_imx_pm_ops,
491 module_platform_driver(ci_hdrc_imx_driver);
493 MODULE_ALIAS("platform:imx-usb");
494 MODULE_LICENSE("GPL v2");
495 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
496 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
497 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");