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 = {
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,
39 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
40 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
41 CI_HDRC_TURN_VBUS_EARLY_ON,
44 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
45 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
46 CI_HDRC_TURN_VBUS_EARLY_ON,
49 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
50 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
51 CI_HDRC_TURN_VBUS_EARLY_ON,
54 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
55 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
56 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
57 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
58 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
59 { .compatible = "fsl,imx6sx-usb", .data = &imx6sl_usb_data},
62 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
64 struct ci_hdrc_imx_data {
66 struct platform_device *ci_pdev;
68 struct imx_usbmisc_data *usbmisc_data;
69 bool supports_runtime_pm;
73 /* Common functions shared by usbmisc drivers */
75 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
77 struct platform_device *misc_pdev;
78 struct device_node *np = dev->of_node;
79 struct of_phandle_args args;
80 struct imx_usbmisc_data *data;
84 * In case the fsl,usbmisc property is not present this device doesn't
85 * need usbmisc. Return NULL (which is no error here)
87 if (!of_get_property(np, "fsl,usbmisc", NULL))
90 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
92 return ERR_PTR(-ENOMEM);
94 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
97 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
102 data->index = args.args[0];
104 misc_pdev = of_find_device_by_node(args.np);
105 of_node_put(args.np);
108 return ERR_PTR(-EPROBE_DEFER);
110 data->dev = &misc_pdev->dev;
112 if (of_find_property(np, "disable-over-current", NULL))
113 data->disable_oc = 1;
115 if (of_find_property(np, "external-vbus-divider", NULL))
121 /* End of common functions shared by usbmisc drivers*/
123 static int ci_hdrc_imx_probe(struct platform_device *pdev)
125 struct ci_hdrc_imx_data *data;
126 struct ci_hdrc_platform_data pdata = {
127 .name = dev_name(&pdev->dev),
128 .capoffset = DEF_CAPOFFSET,
129 .flags = CI_HDRC_DISABLE_STREAMING,
132 const struct of_device_id *of_id =
133 of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
134 const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
136 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
140 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
141 if (IS_ERR(data->usbmisc_data))
142 return PTR_ERR(data->usbmisc_data);
144 data->clk = devm_clk_get(&pdev->dev, NULL);
145 if (IS_ERR(data->clk)) {
147 "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
148 return PTR_ERR(data->clk);
151 ret = clk_prepare_enable(data->clk);
154 "Failed to prepare or enable clock, err=%d\n", ret);
158 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
159 if (IS_ERR(data->phy)) {
160 ret = PTR_ERR(data->phy);
161 /* Return -EINVAL if no usbphy is available */
167 pdata.usb_phy = data->phy;
168 pdata.flags |= imx_platform_flag->flags;
169 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
170 data->supports_runtime_pm = true;
172 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
176 ret = imx_usbmisc_init(data->usbmisc_data);
178 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
182 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
183 pdev->resource, pdev->num_resources,
185 if (IS_ERR(data->ci_pdev)) {
186 ret = PTR_ERR(data->ci_pdev);
188 "Can't register ci_hdrc platform device, err=%d\n",
193 ret = imx_usbmisc_init_post(data->usbmisc_data);
195 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
199 platform_set_drvdata(pdev, data);
201 if (data->supports_runtime_pm) {
202 pm_runtime_set_active(&pdev->dev);
203 pm_runtime_enable(&pdev->dev);
206 device_set_wakeup_capable(&pdev->dev, true);
211 ci_hdrc_remove_device(data->ci_pdev);
213 clk_disable_unprepare(data->clk);
217 static int ci_hdrc_imx_remove(struct platform_device *pdev)
219 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
221 if (data->supports_runtime_pm) {
222 pm_runtime_get_sync(&pdev->dev);
223 pm_runtime_disable(&pdev->dev);
224 pm_runtime_put_noidle(&pdev->dev);
226 ci_hdrc_remove_device(data->ci_pdev);
227 clk_disable_unprepare(data->clk);
233 static int imx_controller_suspend(struct device *dev)
235 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
237 dev_dbg(dev, "at %s\n", __func__);
239 clk_disable_unprepare(data->clk);
245 static int imx_controller_resume(struct device *dev)
247 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
250 dev_dbg(dev, "at %s\n", __func__);
257 ret = clk_prepare_enable(data->clk);
261 data->in_lpm = false;
263 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
265 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
272 clk_disable_unprepare(data->clk);
276 #ifdef CONFIG_PM_SLEEP
277 static int ci_hdrc_imx_suspend(struct device *dev)
281 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
284 /* The core's suspend doesn't run */
287 if (device_may_wakeup(dev)) {
288 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
290 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
296 return imx_controller_suspend(dev);
299 static int ci_hdrc_imx_resume(struct device *dev)
301 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
304 ret = imx_controller_resume(dev);
305 if (!ret && data->supports_runtime_pm) {
306 pm_runtime_disable(dev);
307 pm_runtime_set_active(dev);
308 pm_runtime_enable(dev);
313 #endif /* CONFIG_PM_SLEEP */
315 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
317 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
325 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
327 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
331 return imx_controller_suspend(dev);
334 static int ci_hdrc_imx_runtime_resume(struct device *dev)
336 return imx_controller_resume(dev);
339 #endif /* CONFIG_PM */
341 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
342 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
343 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
344 ci_hdrc_imx_runtime_resume, NULL)
346 static struct platform_driver ci_hdrc_imx_driver = {
347 .probe = ci_hdrc_imx_probe,
348 .remove = ci_hdrc_imx_remove,
351 .of_match_table = ci_hdrc_imx_dt_ids,
352 .pm = &ci_hdrc_imx_pm_ops,
356 module_platform_driver(ci_hdrc_imx_driver);
358 MODULE_ALIAS("platform:imx-usb");
359 MODULE_LICENSE("GPL v2");
360 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
361 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
362 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");