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>
22 #include <linux/regulator/consumer.h>
25 #include "ci_hdrc_imx.h"
27 struct ci_hdrc_imx_data
{
29 struct platform_device
*ci_pdev
;
31 struct regulator
*reg_vbus
;
34 static const struct usbmisc_ops
*usbmisc_ops
;
36 /* Common functions shared by usbmisc drivers */
38 int usbmisc_set_ops(const struct usbmisc_ops
*ops
)
47 EXPORT_SYMBOL_GPL(usbmisc_set_ops
);
49 void usbmisc_unset_ops(const struct usbmisc_ops
*ops
)
53 EXPORT_SYMBOL_GPL(usbmisc_unset_ops
);
55 int usbmisc_get_init_data(struct device
*dev
, struct usbmisc_usb_device
*usbdev
)
57 struct device_node
*np
= dev
->of_node
;
58 struct of_phandle_args args
;
63 ret
= of_parse_phandle_with_args(np
, "fsl,usbmisc", "#index-cells",
66 dev_err(dev
, "Failed to parse property fsl,usbmisc, errno %d\n",
68 memset(usbdev
, 0, sizeof(*usbdev
));
71 usbdev
->index
= args
.args
[0];
74 if (of_find_property(np
, "disable-over-current", NULL
))
75 usbdev
->disable_oc
= 1;
77 if (of_find_property(np
, "external-vbus-divider", NULL
))
82 EXPORT_SYMBOL_GPL(usbmisc_get_init_data
);
84 /* End of common functions shared by usbmisc drivers*/
86 static int ci_hdrc_imx_probe(struct platform_device
*pdev
)
88 struct ci_hdrc_imx_data
*data
;
89 struct ci_hdrc_platform_data pdata
= {
90 .name
= "ci_hdrc_imx",
91 .capoffset
= DEF_CAPOFFSET
,
92 .flags
= CI_HDRC_REQUIRE_TRANSCEIVER
|
93 CI_HDRC_PULLUP_ON_VBUS
|
94 CI_HDRC_DISABLE_STREAMING
,
98 if (of_find_property(pdev
->dev
.of_node
, "fsl,usbmisc", NULL
)
100 return -EPROBE_DEFER
;
102 data
= devm_kzalloc(&pdev
->dev
, sizeof(*data
), GFP_KERNEL
);
104 dev_err(&pdev
->dev
, "Failed to allocate ci_hdrc-imx data!\n");
108 data
->clk
= devm_clk_get(&pdev
->dev
, NULL
);
109 if (IS_ERR(data
->clk
)) {
111 "Failed to get clock, err=%ld\n", PTR_ERR(data
->clk
));
112 return PTR_ERR(data
->clk
);
115 ret
= clk_prepare_enable(data
->clk
);
118 "Failed to prepare or enable clock, err=%d\n", ret
);
122 data
->phy
= devm_usb_get_phy_by_phandle(&pdev
->dev
, "fsl,usbphy", 0);
123 if (!IS_ERR(data
->phy
)) {
124 ret
= usb_phy_init(data
->phy
);
126 dev_err(&pdev
->dev
, "unable to init phy: %d\n", ret
);
129 } else if (PTR_ERR(data
->phy
) == -EPROBE_DEFER
) {
134 /* we only support host now, so enable vbus here */
135 data
->reg_vbus
= devm_regulator_get(&pdev
->dev
, "vbus");
136 if (!IS_ERR(data
->reg_vbus
)) {
137 ret
= regulator_enable(data
->reg_vbus
);
140 "Failed to enable vbus regulator, err=%d\n",
145 data
->reg_vbus
= NULL
;
148 pdata
.phy
= data
->phy
;
150 if (!pdev
->dev
.dma_mask
)
151 pdev
->dev
.dma_mask
= &pdev
->dev
.coherent_dma_mask
;
152 if (!pdev
->dev
.coherent_dma_mask
)
153 pdev
->dev
.coherent_dma_mask
= DMA_BIT_MASK(32);
155 if (usbmisc_ops
&& usbmisc_ops
->init
) {
156 ret
= usbmisc_ops
->init(&pdev
->dev
);
159 "usbmisc init failed, ret=%d\n", ret
);
164 data
->ci_pdev
= ci_hdrc_add_device(&pdev
->dev
,
165 pdev
->resource
, pdev
->num_resources
,
167 if (IS_ERR(data
->ci_pdev
)) {
168 ret
= PTR_ERR(data
->ci_pdev
);
170 "Can't register ci_hdrc platform device, err=%d\n",
175 if (usbmisc_ops
&& usbmisc_ops
->post
) {
176 ret
= usbmisc_ops
->post(&pdev
->dev
);
179 "usbmisc post failed, ret=%d\n", ret
);
184 platform_set_drvdata(pdev
, data
);
186 pm_runtime_no_callbacks(&pdev
->dev
);
187 pm_runtime_enable(&pdev
->dev
);
192 ci_hdrc_remove_device(data
->ci_pdev
);
195 regulator_disable(data
->reg_vbus
);
197 clk_disable_unprepare(data
->clk
);
201 static int ci_hdrc_imx_remove(struct platform_device
*pdev
)
203 struct ci_hdrc_imx_data
*data
= platform_get_drvdata(pdev
);
205 pm_runtime_disable(&pdev
->dev
);
206 ci_hdrc_remove_device(data
->ci_pdev
);
209 regulator_disable(data
->reg_vbus
);
212 usb_phy_shutdown(data
->phy
);
213 module_put(data
->phy
->dev
->driver
->owner
);
216 clk_disable_unprepare(data
->clk
);
221 static const struct of_device_id ci_hdrc_imx_dt_ids
[] = {
222 { .compatible
= "fsl,imx27-usb", },
225 MODULE_DEVICE_TABLE(of
, ci_hdrc_imx_dt_ids
);
227 static struct platform_driver ci_hdrc_imx_driver
= {
228 .probe
= ci_hdrc_imx_probe
,
229 .remove
= ci_hdrc_imx_remove
,
232 .owner
= THIS_MODULE
,
233 .of_match_table
= ci_hdrc_imx_dt_ids
,
237 module_platform_driver(ci_hdrc_imx_driver
);
239 MODULE_ALIAS("platform:imx-usb");
240 MODULE_LICENSE("GPL v2");
241 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
242 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
243 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");