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;
89 /* Common functions shared by usbmisc drivers */
91 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
93 struct platform_device *misc_pdev;
94 struct device_node *np = dev->of_node;
95 struct of_phandle_args args;
96 struct imx_usbmisc_data *data;
100 * In case the fsl,usbmisc property is not present this device doesn't
101 * need usbmisc. Return NULL (which is no error here)
103 if (!of_get_property(np, "fsl,usbmisc", NULL))
106 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
108 return ERR_PTR(-ENOMEM);
110 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
113 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
118 data->index = args.args[0];
120 misc_pdev = of_find_device_by_node(args.np);
121 of_node_put(args.np);
123 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
124 return ERR_PTR(-EPROBE_DEFER);
126 data->dev = &misc_pdev->dev;
128 if (of_find_property(np, "disable-over-current", NULL))
129 data->disable_oc = 1;
131 if (of_find_property(np, "external-vbus-divider", NULL))
137 /* End of common functions shared by usbmisc drivers*/
139 static int ci_hdrc_imx_probe(struct platform_device *pdev)
141 struct ci_hdrc_imx_data *data;
142 struct ci_hdrc_platform_data pdata = {
143 .name = dev_name(&pdev->dev),
144 .capoffset = DEF_CAPOFFSET,
145 .flags = CI_HDRC_SET_NON_ZERO_TTHA,
148 const struct of_device_id *of_id =
149 of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
150 const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
152 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
156 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
157 if (IS_ERR(data->usbmisc_data))
158 return PTR_ERR(data->usbmisc_data);
160 data->clk = devm_clk_get(&pdev->dev, NULL);
161 if (IS_ERR(data->clk)) {
163 "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
164 return PTR_ERR(data->clk);
167 ret = clk_prepare_enable(data->clk);
170 "Failed to prepare or enable clock, err=%d\n", ret);
174 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
175 if (IS_ERR(data->phy)) {
176 ret = PTR_ERR(data->phy);
177 /* Return -EINVAL if no usbphy is available */
183 pdata.usb_phy = data->phy;
184 pdata.flags |= imx_platform_flag->flags;
185 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
186 data->supports_runtime_pm = true;
188 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
192 ret = imx_usbmisc_init(data->usbmisc_data);
194 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
198 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
199 pdev->resource, pdev->num_resources,
201 if (IS_ERR(data->ci_pdev)) {
202 ret = PTR_ERR(data->ci_pdev);
204 "Can't register ci_hdrc platform device, err=%d\n",
209 ret = imx_usbmisc_init_post(data->usbmisc_data);
211 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
215 platform_set_drvdata(pdev, data);
217 if (data->supports_runtime_pm) {
218 pm_runtime_set_active(&pdev->dev);
219 pm_runtime_enable(&pdev->dev);
222 device_set_wakeup_capable(&pdev->dev, true);
227 ci_hdrc_remove_device(data->ci_pdev);
229 clk_disable_unprepare(data->clk);
233 static int ci_hdrc_imx_remove(struct platform_device *pdev)
235 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
237 if (data->supports_runtime_pm) {
238 pm_runtime_get_sync(&pdev->dev);
239 pm_runtime_disable(&pdev->dev);
240 pm_runtime_put_noidle(&pdev->dev);
242 ci_hdrc_remove_device(data->ci_pdev);
243 clk_disable_unprepare(data->clk);
249 static int imx_controller_suspend(struct device *dev)
251 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
253 dev_dbg(dev, "at %s\n", __func__);
255 clk_disable_unprepare(data->clk);
261 static int imx_controller_resume(struct device *dev)
263 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
266 dev_dbg(dev, "at %s\n", __func__);
273 ret = clk_prepare_enable(data->clk);
277 data->in_lpm = false;
279 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
281 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
288 clk_disable_unprepare(data->clk);
292 #ifdef CONFIG_PM_SLEEP
293 static int ci_hdrc_imx_suspend(struct device *dev)
297 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
300 /* The core's suspend doesn't run */
303 if (device_may_wakeup(dev)) {
304 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
306 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
312 return imx_controller_suspend(dev);
315 static int ci_hdrc_imx_resume(struct device *dev)
317 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
320 ret = imx_controller_resume(dev);
321 if (!ret && data->supports_runtime_pm) {
322 pm_runtime_disable(dev);
323 pm_runtime_set_active(dev);
324 pm_runtime_enable(dev);
329 #endif /* CONFIG_PM_SLEEP */
331 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
333 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
341 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
343 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
347 return imx_controller_suspend(dev);
350 static int ci_hdrc_imx_runtime_resume(struct device *dev)
352 return imx_controller_resume(dev);
355 #endif /* CONFIG_PM */
357 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
358 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
359 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
360 ci_hdrc_imx_runtime_resume, NULL)
362 static struct platform_driver ci_hdrc_imx_driver = {
363 .probe = ci_hdrc_imx_probe,
364 .remove = ci_hdrc_imx_remove,
367 .of_match_table = ci_hdrc_imx_dt_ids,
368 .pm = &ci_hdrc_imx_pm_ops,
372 module_platform_driver(ci_hdrc_imx_driver);
374 MODULE_ALIAS("platform:imx-usb");
375 MODULE_LICENSE("GPL v2");
376 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
377 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
378 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");