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;
76 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
81 /* --------------------------------- */
84 /* Common functions shared by usbmisc drivers */
86 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
88 struct platform_device *misc_pdev;
89 struct device_node *np = dev->of_node;
90 struct of_phandle_args args;
91 struct imx_usbmisc_data *data;
95 * In case the fsl,usbmisc property is not present this device doesn't
96 * need usbmisc. Return NULL (which is no error here)
98 if (!of_get_property(np, "fsl,usbmisc", NULL))
101 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
103 return ERR_PTR(-ENOMEM);
105 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
108 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
113 data->index = args.args[0];
115 misc_pdev = of_find_device_by_node(args.np);
116 of_node_put(args.np);
118 if (!misc_pdev || !platform_get_drvdata(misc_pdev))
119 return ERR_PTR(-EPROBE_DEFER);
121 data->dev = &misc_pdev->dev;
123 if (of_find_property(np, "disable-over-current", NULL))
124 data->disable_oc = 1;
126 if (of_find_property(np, "external-vbus-divider", NULL))
132 /* End of common functions shared by usbmisc drivers*/
133 static int imx_get_clks(struct device *dev)
135 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
138 data->clk_ipg = devm_clk_get(dev, "ipg");
139 if (IS_ERR(data->clk_ipg)) {
140 /* If the platform only needs one clocks */
141 data->clk = devm_clk_get(dev, NULL);
142 if (IS_ERR(data->clk)) {
143 ret = PTR_ERR(data->clk);
145 "Failed to get clks, err=%ld,%ld\n",
146 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
152 data->clk_ahb = devm_clk_get(dev, "ahb");
153 if (IS_ERR(data->clk_ahb)) {
154 ret = PTR_ERR(data->clk_ahb);
156 "Failed to get ahb clock, err=%d\n", ret);
160 data->clk_per = devm_clk_get(dev, "per");
161 if (IS_ERR(data->clk_per)) {
162 ret = PTR_ERR(data->clk_per);
164 "Failed to get per clock, err=%d\n", ret);
168 data->need_three_clks = true;
172 static int imx_prepare_enable_clks(struct device *dev)
174 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
177 if (data->need_three_clks) {
178 ret = clk_prepare_enable(data->clk_ipg);
181 "Failed to prepare/enable ipg clk, err=%d\n",
186 ret = clk_prepare_enable(data->clk_ahb);
189 "Failed to prepare/enable ahb clk, err=%d\n",
191 clk_disable_unprepare(data->clk_ipg);
195 ret = clk_prepare_enable(data->clk_per);
198 "Failed to prepare/enable per clk, err=%d\n",
200 clk_disable_unprepare(data->clk_ahb);
201 clk_disable_unprepare(data->clk_ipg);
205 ret = clk_prepare_enable(data->clk);
208 "Failed to prepare/enable clk, err=%d\n",
217 static void imx_disable_unprepare_clks(struct device *dev)
219 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
221 if (data->need_three_clks) {
222 clk_disable_unprepare(data->clk_per);
223 clk_disable_unprepare(data->clk_ahb);
224 clk_disable_unprepare(data->clk_ipg);
226 clk_disable_unprepare(data->clk);
230 static int ci_hdrc_imx_probe(struct platform_device *pdev)
232 struct ci_hdrc_imx_data *data;
233 struct ci_hdrc_platform_data pdata = {
234 .name = dev_name(&pdev->dev),
235 .capoffset = DEF_CAPOFFSET,
236 .flags = CI_HDRC_SET_NON_ZERO_TTHA,
239 const struct of_device_id *of_id =
240 of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
241 const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
243 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
247 platform_set_drvdata(pdev, data);
248 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
249 if (IS_ERR(data->usbmisc_data))
250 return PTR_ERR(data->usbmisc_data);
252 ret = imx_get_clks(&pdev->dev);
256 ret = imx_prepare_enable_clks(&pdev->dev);
260 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
261 if (IS_ERR(data->phy)) {
262 ret = PTR_ERR(data->phy);
263 /* Return -EINVAL if no usbphy is available */
269 pdata.usb_phy = data->phy;
270 pdata.flags |= imx_platform_flag->flags;
271 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
272 data->supports_runtime_pm = true;
274 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
278 ret = imx_usbmisc_init(data->usbmisc_data);
280 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
284 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
285 pdev->resource, pdev->num_resources,
287 if (IS_ERR(data->ci_pdev)) {
288 ret = PTR_ERR(data->ci_pdev);
290 "Can't register ci_hdrc platform device, err=%d\n",
295 ret = imx_usbmisc_init_post(data->usbmisc_data);
297 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
301 if (data->supports_runtime_pm) {
302 pm_runtime_set_active(&pdev->dev);
303 pm_runtime_enable(&pdev->dev);
306 device_set_wakeup_capable(&pdev->dev, true);
311 ci_hdrc_remove_device(data->ci_pdev);
313 imx_disable_unprepare_clks(&pdev->dev);
317 static int ci_hdrc_imx_remove(struct platform_device *pdev)
319 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
321 if (data->supports_runtime_pm) {
322 pm_runtime_get_sync(&pdev->dev);
323 pm_runtime_disable(&pdev->dev);
324 pm_runtime_put_noidle(&pdev->dev);
326 ci_hdrc_remove_device(data->ci_pdev);
327 imx_disable_unprepare_clks(&pdev->dev);
333 static int imx_controller_suspend(struct device *dev)
335 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
337 dev_dbg(dev, "at %s\n", __func__);
339 imx_disable_unprepare_clks(dev);
345 static int imx_controller_resume(struct device *dev)
347 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
350 dev_dbg(dev, "at %s\n", __func__);
357 ret = imx_prepare_enable_clks(dev);
361 data->in_lpm = false;
363 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
365 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
372 imx_disable_unprepare_clks(dev);
376 #ifdef CONFIG_PM_SLEEP
377 static int ci_hdrc_imx_suspend(struct device *dev)
381 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
384 /* The core's suspend doesn't run */
387 if (device_may_wakeup(dev)) {
388 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
390 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
396 return imx_controller_suspend(dev);
399 static int ci_hdrc_imx_resume(struct device *dev)
401 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
404 ret = imx_controller_resume(dev);
405 if (!ret && data->supports_runtime_pm) {
406 pm_runtime_disable(dev);
407 pm_runtime_set_active(dev);
408 pm_runtime_enable(dev);
413 #endif /* CONFIG_PM_SLEEP */
415 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
417 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
425 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
427 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
431 return imx_controller_suspend(dev);
434 static int ci_hdrc_imx_runtime_resume(struct device *dev)
436 return imx_controller_resume(dev);
439 #endif /* CONFIG_PM */
441 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
442 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
443 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
444 ci_hdrc_imx_runtime_resume, NULL)
446 static struct platform_driver ci_hdrc_imx_driver = {
447 .probe = ci_hdrc_imx_probe,
448 .remove = ci_hdrc_imx_remove,
451 .of_match_table = ci_hdrc_imx_dt_ids,
452 .pm = &ci_hdrc_imx_pm_ops,
456 module_platform_driver(ci_hdrc_imx_driver);
458 MODULE_ALIAS("platform:imx-usb");
459 MODULE_LICENSE("GPL v2");
460 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
461 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
462 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");