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 #define CI_HDRC_IMX_IMX28_WRITE_FIX BIT(0)
28 struct ci_hdrc_imx_platform_flag
{
32 static const struct ci_hdrc_imx_platform_flag imx27_usb_data
= {
35 static const struct ci_hdrc_imx_platform_flag imx28_usb_data
= {
36 .flags
= CI_HDRC_IMX_IMX28_WRITE_FIX
,
39 static const struct of_device_id ci_hdrc_imx_dt_ids
[] = {
40 { .compatible
= "fsl,imx28-usb", .data
= &imx28_usb_data
},
41 { .compatible
= "fsl,imx27-usb", .data
= &imx27_usb_data
},
44 MODULE_DEVICE_TABLE(of
, ci_hdrc_imx_dt_ids
);
46 struct ci_hdrc_imx_data
{
48 struct platform_device
*ci_pdev
;
50 struct imx_usbmisc_data
*usbmisc_data
;
53 /* Common functions shared by usbmisc drivers */
55 static struct imx_usbmisc_data
*usbmisc_get_init_data(struct device
*dev
)
57 struct platform_device
*misc_pdev
;
58 struct device_node
*np
= dev
->of_node
;
59 struct of_phandle_args args
;
60 struct imx_usbmisc_data
*data
;
64 * In case the fsl,usbmisc property is not present this device doesn't
65 * need usbmisc. Return NULL (which is no error here)
67 if (!of_get_property(np
, "fsl,usbmisc", NULL
))
70 data
= devm_kzalloc(dev
, sizeof(*data
), GFP_KERNEL
);
72 return ERR_PTR(-ENOMEM
);
74 ret
= of_parse_phandle_with_args(np
, "fsl,usbmisc", "#index-cells",
77 dev_err(dev
, "Failed to parse property fsl,usbmisc, errno %d\n",
82 data
->index
= args
.args
[0];
84 misc_pdev
= of_find_device_by_node(args
.np
);
88 return ERR_PTR(-EPROBE_DEFER
);
90 data
->dev
= &misc_pdev
->dev
;
92 if (of_find_property(np
, "disable-over-current", NULL
))
95 if (of_find_property(np
, "external-vbus-divider", NULL
))
101 /* End of common functions shared by usbmisc drivers*/
103 static int ci_hdrc_imx_probe(struct platform_device
*pdev
)
105 struct ci_hdrc_imx_data
*data
;
106 struct ci_hdrc_platform_data pdata
= {
107 .name
= dev_name(&pdev
->dev
),
108 .capoffset
= DEF_CAPOFFSET
,
109 .flags
= CI_HDRC_REQUIRE_TRANSCEIVER
|
110 CI_HDRC_DISABLE_STREAMING
,
113 const struct of_device_id
*of_id
=
114 of_match_device(ci_hdrc_imx_dt_ids
, &pdev
->dev
);
115 const struct ci_hdrc_imx_platform_flag
*imx_platform_flag
= of_id
->data
;
117 data
= devm_kzalloc(&pdev
->dev
, sizeof(*data
), GFP_KERNEL
);
119 dev_err(&pdev
->dev
, "Failed to allocate ci_hdrc-imx data!\n");
123 data
->usbmisc_data
= usbmisc_get_init_data(&pdev
->dev
);
124 if (IS_ERR(data
->usbmisc_data
))
125 return PTR_ERR(data
->usbmisc_data
);
127 data
->clk
= devm_clk_get(&pdev
->dev
, NULL
);
128 if (IS_ERR(data
->clk
)) {
130 "Failed to get clock, err=%ld\n", PTR_ERR(data
->clk
));
131 return PTR_ERR(data
->clk
);
134 ret
= clk_prepare_enable(data
->clk
);
137 "Failed to prepare or enable clock, err=%d\n", ret
);
141 data
->phy
= devm_usb_get_phy_by_phandle(&pdev
->dev
, "fsl,usbphy", 0);
142 if (IS_ERR(data
->phy
)) {
143 ret
= PTR_ERR(data
->phy
);
144 /* Return -EINVAL if no usbphy is available */
150 pdata
.usb_phy
= data
->phy
;
152 if (imx_platform_flag
->flags
& CI_HDRC_IMX_IMX28_WRITE_FIX
)
153 pdata
.flags
|= CI_HDRC_IMX28_WRITE_FIX
;
155 ret
= dma_coerce_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
159 if (data
->usbmisc_data
) {
160 ret
= imx_usbmisc_init(data
->usbmisc_data
);
162 dev_err(&pdev
->dev
, "usbmisc init failed, ret=%d\n",
168 data
->ci_pdev
= ci_hdrc_add_device(&pdev
->dev
,
169 pdev
->resource
, pdev
->num_resources
,
171 if (IS_ERR(data
->ci_pdev
)) {
172 ret
= PTR_ERR(data
->ci_pdev
);
174 "Can't register ci_hdrc platform device, err=%d\n",
179 if (data
->usbmisc_data
) {
180 ret
= imx_usbmisc_init_post(data
->usbmisc_data
);
182 dev_err(&pdev
->dev
, "usbmisc post failed, ret=%d\n",
188 platform_set_drvdata(pdev
, data
);
190 pm_runtime_no_callbacks(&pdev
->dev
);
191 pm_runtime_enable(&pdev
->dev
);
196 ci_hdrc_remove_device(data
->ci_pdev
);
198 clk_disable_unprepare(data
->clk
);
202 static int ci_hdrc_imx_remove(struct platform_device
*pdev
)
204 struct ci_hdrc_imx_data
*data
= platform_get_drvdata(pdev
);
206 pm_runtime_disable(&pdev
->dev
);
207 ci_hdrc_remove_device(data
->ci_pdev
);
208 clk_disable_unprepare(data
->clk
);
213 static struct platform_driver ci_hdrc_imx_driver
= {
214 .probe
= ci_hdrc_imx_probe
,
215 .remove
= ci_hdrc_imx_remove
,
218 .owner
= THIS_MODULE
,
219 .of_match_table
= ci_hdrc_imx_dt_ids
,
223 module_platform_driver(ci_hdrc_imx_driver
);
225 MODULE_ALIAS("platform:imx-usb");
226 MODULE_LICENSE("GPL v2");
227 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
228 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
229 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");