2 * Copyright 2012 Freescale Semiconductor, Inc.
3 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
4 * on behalf of DENX Software Engineering GmbH
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:
10 * http://www.opensource.org/licenses/gpl-license.html
11 * http://www.gnu.org/copyleft/gpl.html
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>
24 #include "ci_hdrc_imx.h"
26 struct ci_hdrc_imx_platform_flag {
31 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
32 CI_HDRC_DISABLE_STREAMING,
35 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
36 .flags = CI_HDRC_IMX28_WRITE_FIX |
37 CI_HDRC_TURN_VBUS_EARLY_ON |
38 CI_HDRC_DISABLE_STREAMING,
41 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
42 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
43 CI_HDRC_TURN_VBUS_EARLY_ON |
44 CI_HDRC_DISABLE_STREAMING,
47 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
48 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
49 CI_HDRC_TURN_VBUS_EARLY_ON |
50 CI_HDRC_DISABLE_HOST_STREAMING,
53 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
54 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
55 CI_HDRC_TURN_VBUS_EARLY_ON |
56 CI_HDRC_DISABLE_HOST_STREAMING,
59 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
60 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
61 CI_HDRC_TURN_VBUS_EARLY_ON,
64 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
65 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
68 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
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},
78 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
80 struct ci_hdrc_imx_data {
82 struct platform_device *ci_pdev;
84 struct imx_usbmisc_data *usbmisc_data;
85 bool supports_runtime_pm;
87 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
92 /* --------------------------------- */
95 /* Common functions shared by usbmisc drivers */
97 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
99 struct platform_device *misc_pdev;
100 struct device_node *np = dev->of_node;
101 struct of_phandle_args args;
102 struct imx_usbmisc_data *data;
106 * In case the fsl,usbmisc property is not present this device doesn't
107 * need usbmisc. Return NULL (which is no error here)
109 if (!of_get_property(np, "fsl,usbmisc", NULL))
112 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
114 return ERR_PTR(-ENOMEM);
116 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
119 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
124 data->index = args.args[0];
126 misc_pdev = of_find_device_by_node(args.np);
127 of_node_put(args.np);
129 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
130 return ERR_PTR(-EPROBE_DEFER);
132 data->dev = &misc_pdev->dev;
134 if (of_find_property(np, "disable-over-current", NULL))
135 data->disable_oc = 1;
137 if (of_find_property(np, "external-vbus-divider", NULL))
143 /* End of common functions shared by usbmisc drivers*/
144 static int imx_get_clks(struct device *dev)
146 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
149 data->clk_ipg = devm_clk_get(dev, "ipg");
150 if (IS_ERR(data->clk_ipg)) {
151 /* If the platform only needs one clocks */
152 data->clk = devm_clk_get(dev, NULL);
153 if (IS_ERR(data->clk)) {
154 ret = PTR_ERR(data->clk);
156 "Failed to get clks, err=%ld,%ld\n",
157 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
163 data->clk_ahb = devm_clk_get(dev, "ahb");
164 if (IS_ERR(data->clk_ahb)) {
165 ret = PTR_ERR(data->clk_ahb);
167 "Failed to get ahb clock, err=%d\n", ret);
171 data->clk_per = devm_clk_get(dev, "per");
172 if (IS_ERR(data->clk_per)) {
173 ret = PTR_ERR(data->clk_per);
175 "Failed to get per clock, err=%d\n", ret);
179 data->need_three_clks = true;
183 static int imx_prepare_enable_clks(struct device *dev)
185 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
188 if (data->need_three_clks) {
189 ret = clk_prepare_enable(data->clk_ipg);
192 "Failed to prepare/enable ipg clk, err=%d\n",
197 ret = clk_prepare_enable(data->clk_ahb);
200 "Failed to prepare/enable ahb clk, err=%d\n",
202 clk_disable_unprepare(data->clk_ipg);
206 ret = clk_prepare_enable(data->clk_per);
209 "Failed to prepare/enable per clk, err=%d\n",
211 clk_disable_unprepare(data->clk_ahb);
212 clk_disable_unprepare(data->clk_ipg);
216 ret = clk_prepare_enable(data->clk);
219 "Failed to prepare/enable clk, err=%d\n",
228 static void imx_disable_unprepare_clks(struct device *dev)
230 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
232 if (data->need_three_clks) {
233 clk_disable_unprepare(data->clk_per);
234 clk_disable_unprepare(data->clk_ahb);
235 clk_disable_unprepare(data->clk_ipg);
237 clk_disable_unprepare(data->clk);
241 static int ci_hdrc_imx_probe(struct platform_device *pdev)
243 struct ci_hdrc_imx_data *data;
244 struct ci_hdrc_platform_data pdata = {
245 .name = dev_name(&pdev->dev),
246 .capoffset = DEF_CAPOFFSET,
247 .flags = CI_HDRC_SET_NON_ZERO_TTHA,
250 const struct of_device_id *of_id =
251 of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
252 const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
254 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
258 platform_set_drvdata(pdev, data);
259 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
260 if (IS_ERR(data->usbmisc_data))
261 return PTR_ERR(data->usbmisc_data);
263 ret = imx_get_clks(&pdev->dev);
267 ret = imx_prepare_enable_clks(&pdev->dev);
271 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
272 if (IS_ERR(data->phy)) {
273 ret = PTR_ERR(data->phy);
274 /* Return -EINVAL if no usbphy is available */
280 pdata.usb_phy = data->phy;
281 pdata.flags |= imx_platform_flag->flags;
282 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
283 data->supports_runtime_pm = true;
285 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
289 ret = imx_usbmisc_init(data->usbmisc_data);
291 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
295 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
296 pdev->resource, pdev->num_resources,
298 if (IS_ERR(data->ci_pdev)) {
299 ret = PTR_ERR(data->ci_pdev);
301 "Can't register ci_hdrc platform device, err=%d\n",
306 ret = imx_usbmisc_init_post(data->usbmisc_data);
308 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
312 if (data->supports_runtime_pm) {
313 pm_runtime_set_active(&pdev->dev);
314 pm_runtime_enable(&pdev->dev);
317 device_set_wakeup_capable(&pdev->dev, true);
322 ci_hdrc_remove_device(data->ci_pdev);
324 imx_disable_unprepare_clks(&pdev->dev);
328 static int ci_hdrc_imx_remove(struct platform_device *pdev)
330 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
332 if (data->supports_runtime_pm) {
333 pm_runtime_get_sync(&pdev->dev);
334 pm_runtime_disable(&pdev->dev);
335 pm_runtime_put_noidle(&pdev->dev);
337 ci_hdrc_remove_device(data->ci_pdev);
338 imx_disable_unprepare_clks(&pdev->dev);
344 static int imx_controller_suspend(struct device *dev)
346 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
348 dev_dbg(dev, "at %s\n", __func__);
350 imx_disable_unprepare_clks(dev);
356 static int imx_controller_resume(struct device *dev)
358 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
361 dev_dbg(dev, "at %s\n", __func__);
368 ret = imx_prepare_enable_clks(dev);
372 data->in_lpm = false;
374 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
376 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
383 imx_disable_unprepare_clks(dev);
387 #ifdef CONFIG_PM_SLEEP
388 static int ci_hdrc_imx_suspend(struct device *dev)
392 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
395 /* The core's suspend doesn't run */
398 if (device_may_wakeup(dev)) {
399 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
401 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
407 return imx_controller_suspend(dev);
410 static int ci_hdrc_imx_resume(struct device *dev)
412 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
415 ret = imx_controller_resume(dev);
416 if (!ret && data->supports_runtime_pm) {
417 pm_runtime_disable(dev);
418 pm_runtime_set_active(dev);
419 pm_runtime_enable(dev);
424 #endif /* CONFIG_PM_SLEEP */
426 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
428 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
436 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
438 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
442 return imx_controller_suspend(dev);
445 static int ci_hdrc_imx_runtime_resume(struct device *dev)
447 return imx_controller_resume(dev);
450 #endif /* CONFIG_PM */
452 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
453 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
454 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
455 ci_hdrc_imx_runtime_resume, NULL)
457 static struct platform_driver ci_hdrc_imx_driver = {
458 .probe = ci_hdrc_imx_probe,
459 .remove = ci_hdrc_imx_remove,
462 .of_match_table = ci_hdrc_imx_dt_ids,
463 .pm = &ci_hdrc_imx_pm_ops,
467 module_platform_driver(ci_hdrc_imx_driver);
469 MODULE_ALIAS("platform:imx-usb");
470 MODULE_LICENSE("GPL v2");
471 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
472 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
473 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");