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 of_device_id ci_hdrc_imx_dt_ids[] = {
60 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
61 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
62 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
63 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
64 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
67 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
69 struct ci_hdrc_imx_data {
71 struct platform_device *ci_pdev;
73 struct imx_usbmisc_data *usbmisc_data;
74 bool supports_runtime_pm;
78 /* Common functions shared by usbmisc drivers */
80 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
82 struct platform_device *misc_pdev;
83 struct device_node *np = dev->of_node;
84 struct of_phandle_args args;
85 struct imx_usbmisc_data *data;
89 * In case the fsl,usbmisc property is not present this device doesn't
90 * need usbmisc. Return NULL (which is no error here)
92 if (!of_get_property(np, "fsl,usbmisc", NULL))
95 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
97 return ERR_PTR(-ENOMEM);
99 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
102 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
107 data->index = args.args[0];
109 misc_pdev = of_find_device_by_node(args.np);
110 of_node_put(args.np);
112 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
113 return ERR_PTR(-EPROBE_DEFER);
115 data->dev = &misc_pdev->dev;
117 if (of_find_property(np, "disable-over-current", NULL))
118 data->disable_oc = 1;
120 if (of_find_property(np, "external-vbus-divider", NULL))
126 /* End of common functions shared by usbmisc drivers*/
128 static int ci_hdrc_imx_probe(struct platform_device *pdev)
130 struct ci_hdrc_imx_data *data;
131 struct ci_hdrc_platform_data pdata = {
132 .name = dev_name(&pdev->dev),
133 .capoffset = DEF_CAPOFFSET,
134 .flags = CI_HDRC_SET_NON_ZERO_TTHA,
137 const struct of_device_id *of_id =
138 of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
139 const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
141 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
145 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
146 if (IS_ERR(data->usbmisc_data))
147 return PTR_ERR(data->usbmisc_data);
149 data->clk = devm_clk_get(&pdev->dev, NULL);
150 if (IS_ERR(data->clk)) {
152 "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
153 return PTR_ERR(data->clk);
156 ret = clk_prepare_enable(data->clk);
159 "Failed to prepare or enable clock, err=%d\n", ret);
163 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
164 if (IS_ERR(data->phy)) {
165 ret = PTR_ERR(data->phy);
166 /* Return -EINVAL if no usbphy is available */
172 pdata.usb_phy = data->phy;
173 pdata.flags |= imx_platform_flag->flags;
174 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
175 data->supports_runtime_pm = true;
177 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
181 ret = imx_usbmisc_init(data->usbmisc_data);
183 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
187 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
188 pdev->resource, pdev->num_resources,
190 if (IS_ERR(data->ci_pdev)) {
191 ret = PTR_ERR(data->ci_pdev);
193 "Can't register ci_hdrc platform device, err=%d\n",
198 ret = imx_usbmisc_init_post(data->usbmisc_data);
200 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
204 platform_set_drvdata(pdev, data);
206 if (data->supports_runtime_pm) {
207 pm_runtime_set_active(&pdev->dev);
208 pm_runtime_enable(&pdev->dev);
211 device_set_wakeup_capable(&pdev->dev, true);
216 ci_hdrc_remove_device(data->ci_pdev);
218 clk_disable_unprepare(data->clk);
222 static int ci_hdrc_imx_remove(struct platform_device *pdev)
224 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
226 if (data->supports_runtime_pm) {
227 pm_runtime_get_sync(&pdev->dev);
228 pm_runtime_disable(&pdev->dev);
229 pm_runtime_put_noidle(&pdev->dev);
231 ci_hdrc_remove_device(data->ci_pdev);
232 clk_disable_unprepare(data->clk);
238 static int imx_controller_suspend(struct device *dev)
240 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
242 dev_dbg(dev, "at %s\n", __func__);
244 clk_disable_unprepare(data->clk);
250 static int imx_controller_resume(struct device *dev)
252 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
255 dev_dbg(dev, "at %s\n", __func__);
262 ret = clk_prepare_enable(data->clk);
266 data->in_lpm = false;
268 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
270 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
277 clk_disable_unprepare(data->clk);
281 #ifdef CONFIG_PM_SLEEP
282 static int ci_hdrc_imx_suspend(struct device *dev)
286 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
289 /* The core's suspend doesn't run */
292 if (device_may_wakeup(dev)) {
293 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
295 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
301 return imx_controller_suspend(dev);
304 static int ci_hdrc_imx_resume(struct device *dev)
306 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
309 ret = imx_controller_resume(dev);
310 if (!ret && data->supports_runtime_pm) {
311 pm_runtime_disable(dev);
312 pm_runtime_set_active(dev);
313 pm_runtime_enable(dev);
318 #endif /* CONFIG_PM_SLEEP */
320 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
322 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
330 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
332 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
336 return imx_controller_suspend(dev);
339 static int ci_hdrc_imx_runtime_resume(struct device *dev)
341 return imx_controller_resume(dev);
344 #endif /* CONFIG_PM */
346 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
347 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
348 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
349 ci_hdrc_imx_runtime_resume, NULL)
351 static struct platform_driver ci_hdrc_imx_driver = {
352 .probe = ci_hdrc_imx_probe,
353 .remove = ci_hdrc_imx_remove,
356 .of_match_table = ci_hdrc_imx_dt_ids,
357 .pm = &ci_hdrc_imx_pm_ops,
361 module_platform_driver(ci_hdrc_imx_driver);
363 MODULE_ALIAS("platform:imx-usb");
364 MODULE_LICENSE("GPL v2");
365 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
366 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
367 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");