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/usb/of.h>
22 #include <linux/clk.h>
25 #include "ci_hdrc_imx.h"
27 struct ci_hdrc_imx_platform_flag {
32 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
33 .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
34 CI_HDRC_DISABLE_STREAMING,
37 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
38 CI_HDRC_DISABLE_STREAMING,
41 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
42 .flags = CI_HDRC_IMX28_WRITE_FIX |
43 CI_HDRC_TURN_VBUS_EARLY_ON |
44 CI_HDRC_DISABLE_STREAMING,
47 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
48 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
49 CI_HDRC_TURN_VBUS_EARLY_ON |
50 CI_HDRC_DISABLE_STREAMING,
53 static const struct ci_hdrc_imx_platform_flag imx6sl_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 imx6sx_usb_data = {
60 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
61 CI_HDRC_TURN_VBUS_EARLY_ON |
62 CI_HDRC_DISABLE_HOST_STREAMING,
65 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
66 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
67 CI_HDRC_TURN_VBUS_EARLY_ON |
68 CI_HDRC_DISABLE_DEVICE_STREAMING,
71 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
72 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
75 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
76 { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
77 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
78 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
79 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
80 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
81 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
82 { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
83 { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
86 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
88 struct ci_hdrc_imx_data {
90 struct platform_device *ci_pdev;
92 struct imx_usbmisc_data *usbmisc_data;
93 bool supports_runtime_pm;
95 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
100 /* --------------------------------- */
103 /* Common functions shared by usbmisc drivers */
105 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
107 struct platform_device *misc_pdev;
108 struct device_node *np = dev->of_node;
109 struct of_phandle_args args;
110 struct imx_usbmisc_data *data;
114 * In case the fsl,usbmisc property is not present this device doesn't
115 * need usbmisc. Return NULL (which is no error here)
117 if (!of_get_property(np, "fsl,usbmisc", NULL))
120 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
122 return ERR_PTR(-ENOMEM);
124 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
127 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
132 data->index = args.args[0];
134 misc_pdev = of_find_device_by_node(args.np);
135 of_node_put(args.np);
138 return ERR_PTR(-EPROBE_DEFER);
140 if (!platform_get_drvdata(misc_pdev)) {
141 put_device(&misc_pdev->dev);
142 return ERR_PTR(-EPROBE_DEFER);
144 data->dev = &misc_pdev->dev;
146 if (of_find_property(np, "disable-over-current", NULL))
147 data->disable_oc = 1;
149 if (of_find_property(np, "over-current-active-high", NULL))
150 data->oc_polarity = 1;
152 if (of_find_property(np, "external-vbus-divider", NULL))
155 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
161 /* End of common functions shared by usbmisc drivers*/
162 static int imx_get_clks(struct device *dev)
164 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
167 data->clk_ipg = devm_clk_get(dev, "ipg");
168 if (IS_ERR(data->clk_ipg)) {
169 /* If the platform only needs one clocks */
170 data->clk = devm_clk_get(dev, NULL);
171 if (IS_ERR(data->clk)) {
172 ret = PTR_ERR(data->clk);
174 "Failed to get clks, err=%ld,%ld\n",
175 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
181 data->clk_ahb = devm_clk_get(dev, "ahb");
182 if (IS_ERR(data->clk_ahb)) {
183 ret = PTR_ERR(data->clk_ahb);
185 "Failed to get ahb clock, err=%d\n", ret);
189 data->clk_per = devm_clk_get(dev, "per");
190 if (IS_ERR(data->clk_per)) {
191 ret = PTR_ERR(data->clk_per);
193 "Failed to get per clock, err=%d\n", ret);
197 data->need_three_clks = true;
201 static int imx_prepare_enable_clks(struct device *dev)
203 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
206 if (data->need_three_clks) {
207 ret = clk_prepare_enable(data->clk_ipg);
210 "Failed to prepare/enable ipg clk, err=%d\n",
215 ret = clk_prepare_enable(data->clk_ahb);
218 "Failed to prepare/enable ahb clk, err=%d\n",
220 clk_disable_unprepare(data->clk_ipg);
224 ret = clk_prepare_enable(data->clk_per);
227 "Failed to prepare/enable per clk, err=%d\n",
229 clk_disable_unprepare(data->clk_ahb);
230 clk_disable_unprepare(data->clk_ipg);
234 ret = clk_prepare_enable(data->clk);
237 "Failed to prepare/enable clk, err=%d\n",
246 static void imx_disable_unprepare_clks(struct device *dev)
248 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
250 if (data->need_three_clks) {
251 clk_disable_unprepare(data->clk_per);
252 clk_disable_unprepare(data->clk_ahb);
253 clk_disable_unprepare(data->clk_ipg);
255 clk_disable_unprepare(data->clk);
259 static int ci_hdrc_imx_probe(struct platform_device *pdev)
261 struct ci_hdrc_imx_data *data;
262 struct ci_hdrc_platform_data pdata = {
263 .name = dev_name(&pdev->dev),
264 .capoffset = DEF_CAPOFFSET,
267 const struct of_device_id *of_id;
268 const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
270 of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
274 imx_platform_flag = of_id->data;
276 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
280 platform_set_drvdata(pdev, data);
281 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
282 if (IS_ERR(data->usbmisc_data))
283 return PTR_ERR(data->usbmisc_data);
285 ret = imx_get_clks(&pdev->dev);
289 ret = imx_prepare_enable_clks(&pdev->dev);
293 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
294 if (IS_ERR(data->phy)) {
295 ret = PTR_ERR(data->phy);
296 /* Return -EINVAL if no usbphy is available */
302 pdata.usb_phy = data->phy;
303 pdata.flags |= imx_platform_flag->flags;
304 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
305 data->supports_runtime_pm = true;
307 ret = imx_usbmisc_init(data->usbmisc_data);
309 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
313 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
314 pdev->resource, pdev->num_resources,
316 if (IS_ERR(data->ci_pdev)) {
317 ret = PTR_ERR(data->ci_pdev);
318 if (ret != -EPROBE_DEFER)
320 "ci_hdrc_add_device failed, err=%d\n", ret);
324 ret = imx_usbmisc_init_post(data->usbmisc_data);
326 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
330 if (data->supports_runtime_pm) {
331 pm_runtime_set_active(&pdev->dev);
332 pm_runtime_enable(&pdev->dev);
335 device_set_wakeup_capable(&pdev->dev, true);
340 ci_hdrc_remove_device(data->ci_pdev);
342 imx_disable_unprepare_clks(&pdev->dev);
346 static int ci_hdrc_imx_remove(struct platform_device *pdev)
348 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
350 if (data->supports_runtime_pm) {
351 pm_runtime_get_sync(&pdev->dev);
352 pm_runtime_disable(&pdev->dev);
353 pm_runtime_put_noidle(&pdev->dev);
355 ci_hdrc_remove_device(data->ci_pdev);
356 imx_disable_unprepare_clks(&pdev->dev);
361 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
363 ci_hdrc_imx_remove(pdev);
367 static int imx_controller_suspend(struct device *dev)
369 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
371 dev_dbg(dev, "at %s\n", __func__);
373 imx_disable_unprepare_clks(dev);
379 static int imx_controller_resume(struct device *dev)
381 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
384 dev_dbg(dev, "at %s\n", __func__);
391 ret = imx_prepare_enable_clks(dev);
395 data->in_lpm = false;
397 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
399 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
406 imx_disable_unprepare_clks(dev);
410 #ifdef CONFIG_PM_SLEEP
411 static int ci_hdrc_imx_suspend(struct device *dev)
415 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
418 /* The core's suspend doesn't run */
421 if (device_may_wakeup(dev)) {
422 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
424 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
430 return imx_controller_suspend(dev);
433 static int ci_hdrc_imx_resume(struct device *dev)
435 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
438 ret = imx_controller_resume(dev);
439 if (!ret && data->supports_runtime_pm) {
440 pm_runtime_disable(dev);
441 pm_runtime_set_active(dev);
442 pm_runtime_enable(dev);
447 #endif /* CONFIG_PM_SLEEP */
449 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
451 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
459 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
461 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
465 return imx_controller_suspend(dev);
468 static int ci_hdrc_imx_runtime_resume(struct device *dev)
470 return imx_controller_resume(dev);
473 #endif /* CONFIG_PM */
475 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
476 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
477 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
478 ci_hdrc_imx_runtime_resume, NULL)
480 static struct platform_driver ci_hdrc_imx_driver = {
481 .probe = ci_hdrc_imx_probe,
482 .remove = ci_hdrc_imx_remove,
483 .shutdown = ci_hdrc_imx_shutdown,
486 .of_match_table = ci_hdrc_imx_dt_ids,
487 .pm = &ci_hdrc_imx_pm_ops,
491 module_platform_driver(ci_hdrc_imx_driver);
493 MODULE_ALIAS("platform:imx-usb");
494 MODULE_LICENSE("GPL v2");
495 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
496 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
497 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");