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_data
{
28 struct platform_device
*ci_pdev
;
30 struct imx_usbmisc_data
*usbmisc_data
;
33 /* Common functions shared by usbmisc drivers */
35 static struct imx_usbmisc_data
*usbmisc_get_init_data(struct device
*dev
)
37 struct device_node
*np
= dev
->of_node
;
38 struct of_phandle_args args
;
39 struct imx_usbmisc_data
*data
;
43 * In case the fsl,usbmisc property is not present this device doesn't
44 * need usbmisc. Return NULL (which is no error here)
46 if (!of_get_property(np
, "fsl,usbmisc", NULL
))
49 data
= devm_kzalloc(dev
, sizeof(*data
), GFP_KERNEL
);
51 return ERR_PTR(-ENOMEM
);
53 ret
= of_parse_phandle_with_args(np
, "fsl,usbmisc", "#index-cells",
56 dev_err(dev
, "Failed to parse property fsl,usbmisc, errno %d\n",
61 data
->index
= args
.args
[0];
64 if (of_find_property(np
, "disable-over-current", NULL
))
67 if (of_find_property(np
, "external-vbus-divider", NULL
))
73 /* End of common functions shared by usbmisc drivers*/
75 static int ci_hdrc_imx_probe(struct platform_device
*pdev
)
77 struct ci_hdrc_imx_data
*data
;
78 struct ci_hdrc_platform_data pdata
= {
79 .name
= "ci_hdrc_imx",
80 .capoffset
= DEF_CAPOFFSET
,
81 .flags
= CI_HDRC_REQUIRE_TRANSCEIVER
|
82 CI_HDRC_DISABLE_STREAMING
,
86 data
= devm_kzalloc(&pdev
->dev
, sizeof(*data
), GFP_KERNEL
);
88 dev_err(&pdev
->dev
, "Failed to allocate ci_hdrc-imx data!\n");
92 data
->usbmisc_data
= usbmisc_get_init_data(&pdev
->dev
);
93 if (IS_ERR(data
->usbmisc_data
))
94 return PTR_ERR(data
->usbmisc_data
);
96 data
->clk
= devm_clk_get(&pdev
->dev
, NULL
);
97 if (IS_ERR(data
->clk
)) {
99 "Failed to get clock, err=%ld\n", PTR_ERR(data
->clk
));
100 return PTR_ERR(data
->clk
);
103 ret
= clk_prepare_enable(data
->clk
);
106 "Failed to prepare or enable clock, err=%d\n", ret
);
110 data
->phy
= devm_usb_get_phy_by_phandle(&pdev
->dev
, "fsl,usbphy", 0);
111 if (!IS_ERR(data
->phy
)) {
112 ret
= usb_phy_init(data
->phy
);
114 dev_err(&pdev
->dev
, "unable to init phy: %d\n", ret
);
117 } else if (PTR_ERR(data
->phy
) == -EPROBE_DEFER
) {
122 pdata
.phy
= data
->phy
;
124 if (!pdev
->dev
.dma_mask
)
125 pdev
->dev
.dma_mask
= &pdev
->dev
.coherent_dma_mask
;
126 if (!pdev
->dev
.coherent_dma_mask
)
127 pdev
->dev
.coherent_dma_mask
= DMA_BIT_MASK(32);
129 if (data
->usbmisc_data
) {
130 ret
= imx_usbmisc_init(data
->usbmisc_data
);
132 dev_err(&pdev
->dev
, "usbmisc init failed, ret=%d\n",
138 data
->ci_pdev
= ci_hdrc_add_device(&pdev
->dev
,
139 pdev
->resource
, pdev
->num_resources
,
141 if (IS_ERR(data
->ci_pdev
)) {
142 ret
= PTR_ERR(data
->ci_pdev
);
144 "Can't register ci_hdrc platform device, err=%d\n",
149 if (data
->usbmisc_data
) {
150 ret
= imx_usbmisc_init_post(data
->usbmisc_data
);
152 dev_err(&pdev
->dev
, "usbmisc post failed, ret=%d\n",
158 platform_set_drvdata(pdev
, data
);
160 pm_runtime_no_callbacks(&pdev
->dev
);
161 pm_runtime_enable(&pdev
->dev
);
166 ci_hdrc_remove_device(data
->ci_pdev
);
169 usb_phy_shutdown(data
->phy
);
171 clk_disable_unprepare(data
->clk
);
175 static int ci_hdrc_imx_remove(struct platform_device
*pdev
)
177 struct ci_hdrc_imx_data
*data
= platform_get_drvdata(pdev
);
179 pm_runtime_disable(&pdev
->dev
);
180 ci_hdrc_remove_device(data
->ci_pdev
);
183 usb_phy_shutdown(data
->phy
);
185 clk_disable_unprepare(data
->clk
);
190 static const struct of_device_id ci_hdrc_imx_dt_ids
[] = {
191 { .compatible
= "fsl,imx27-usb", },
194 MODULE_DEVICE_TABLE(of
, ci_hdrc_imx_dt_ids
);
196 static struct platform_driver ci_hdrc_imx_driver
= {
197 .probe
= ci_hdrc_imx_probe
,
198 .remove
= ci_hdrc_imx_remove
,
201 .owner
= THIS_MODULE
,
202 .of_match_table
= ci_hdrc_imx_dt_ids
,
206 module_platform_driver(ci_hdrc_imx_driver
);
208 MODULE_ALIAS("platform:imx-usb");
209 MODULE_LICENSE("GPL v2");
210 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
211 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
212 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");