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>");