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>
23 #include <linux/pinctrl/consumer.h>
26 #include "ci13xxx_imx.h"
28 #define pdev_to_phy(pdev) \
29 ((struct usb_phy *)platform_get_drvdata(pdev))
31 struct ci13xxx_imx_data
{
32 struct device_node
*phy_np
;
34 struct platform_device
*ci_pdev
;
36 struct regulator
*reg_vbus
;
39 static const struct usbmisc_ops
*usbmisc_ops
;
41 /* Common functions shared by usbmisc drivers */
43 int usbmisc_set_ops(const struct usbmisc_ops
*ops
)
52 EXPORT_SYMBOL_GPL(usbmisc_set_ops
);
54 void usbmisc_unset_ops(const struct usbmisc_ops
*ops
)
58 EXPORT_SYMBOL_GPL(usbmisc_unset_ops
);
60 int usbmisc_get_init_data(struct device
*dev
, struct usbmisc_usb_device
*usbdev
)
62 struct device_node
*np
= dev
->of_node
;
63 struct of_phandle_args args
;
68 ret
= of_parse_phandle_with_args(np
, "fsl,usbmisc", "#index-cells",
71 dev_err(dev
, "Failed to parse property fsl,usbmisc, errno %d\n",
73 memset(usbdev
, 0, sizeof(*usbdev
));
76 usbdev
->index
= args
.args
[0];
79 if (of_find_property(np
, "disable-over-current", NULL
))
80 usbdev
->disable_oc
= 1;
84 EXPORT_SYMBOL_GPL(usbmisc_get_init_data
);
86 /* End of common functions shared by usbmisc drivers*/
88 static struct ci13xxx_platform_data ci13xxx_imx_platdata __devinitdata
= {
89 .name
= "ci13xxx_imx",
90 .flags
= CI13XXX_REQUIRE_TRANSCEIVER
|
91 CI13XXX_PULLUP_ON_VBUS
|
92 CI13XXX_DISABLE_STREAMING
,
93 .capoffset
= DEF_CAPOFFSET
,
96 static int __devinit
ci13xxx_imx_probe(struct platform_device
*pdev
)
98 struct ci13xxx_imx_data
*data
;
99 struct platform_device
*plat_ci
, *phy_pdev
;
100 struct device_node
*phy_np
;
101 struct resource
*res
;
102 struct regulator
*reg_vbus
;
103 struct pinctrl
*pinctrl
;
106 if (of_find_property(pdev
->dev
.of_node
, "fsl,usbmisc", NULL
)
108 return -EPROBE_DEFER
;
110 data
= devm_kzalloc(&pdev
->dev
, sizeof(*data
), GFP_KERNEL
);
112 dev_err(&pdev
->dev
, "Failed to allocate CI13xxx-IMX data!\n");
116 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
118 dev_err(&pdev
->dev
, "Can't get device resources!\n");
122 pinctrl
= devm_pinctrl_get_select_default(&pdev
->dev
);
124 dev_warn(&pdev
->dev
, "pinctrl get/select failed, err=%ld\n",
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 phy_np
= of_parse_phandle(pdev
->dev
.of_node
, "fsl,usbphy", 0);
143 data
->phy_np
= phy_np
;
144 phy_pdev
= of_find_device_by_node(phy_np
);
147 phy
= pdev_to_phy(phy_pdev
);
149 try_module_get(phy_pdev
->dev
.driver
->owner
)) {
156 /* we only support host now, so enable vbus here */
157 reg_vbus
= devm_regulator_get(&pdev
->dev
, "vbus");
158 if (!IS_ERR(reg_vbus
)) {
159 ret
= regulator_enable(reg_vbus
);
162 "Failed to enable vbus regulator, err=%d\n",
166 data
->reg_vbus
= reg_vbus
;
171 ci13xxx_imx_platdata
.phy
= data
->phy
;
173 if (!pdev
->dev
.dma_mask
) {
174 pdev
->dev
.dma_mask
= devm_kzalloc(&pdev
->dev
,
175 sizeof(*pdev
->dev
.dma_mask
), GFP_KERNEL
);
176 if (!pdev
->dev
.dma_mask
) {
178 dev_err(&pdev
->dev
, "Failed to alloc dma_mask!\n");
181 *pdev
->dev
.dma_mask
= DMA_BIT_MASK(32);
182 dma_set_coherent_mask(&pdev
->dev
, *pdev
->dev
.dma_mask
);
185 if (usbmisc_ops
&& usbmisc_ops
->init
) {
186 ret
= usbmisc_ops
->init(&pdev
->dev
);
189 "usbmisc init failed, ret=%d\n", ret
);
194 plat_ci
= ci13xxx_add_device(&pdev
->dev
,
195 pdev
->resource
, pdev
->num_resources
,
196 &ci13xxx_imx_platdata
);
197 if (IS_ERR(plat_ci
)) {
198 ret
= PTR_ERR(plat_ci
);
200 "Can't register ci_hdrc platform device, err=%d\n",
205 data
->ci_pdev
= plat_ci
;
206 platform_set_drvdata(pdev
, data
);
208 pm_runtime_no_callbacks(&pdev
->dev
);
209 pm_runtime_enable(&pdev
->dev
);
215 regulator_disable(reg_vbus
);
219 clk_disable_unprepare(data
->clk
);
223 static int __devexit
ci13xxx_imx_remove(struct platform_device
*pdev
)
225 struct ci13xxx_imx_data
*data
= platform_get_drvdata(pdev
);
227 pm_runtime_disable(&pdev
->dev
);
228 ci13xxx_remove_device(data
->ci_pdev
);
231 regulator_disable(data
->reg_vbus
);
234 usb_phy_shutdown(data
->phy
);
235 module_put(data
->phy
->dev
->driver
->owner
);
238 of_node_put(data
->phy_np
);
240 clk_disable_unprepare(data
->clk
);
242 platform_set_drvdata(pdev
, NULL
);
247 static const struct of_device_id ci13xxx_imx_dt_ids
[] = {
248 { .compatible
= "fsl,imx27-usb", },
251 MODULE_DEVICE_TABLE(of
, ci13xxx_imx_dt_ids
);
253 static struct platform_driver ci13xxx_imx_driver
= {
254 .probe
= ci13xxx_imx_probe
,
255 .remove
= __devexit_p(ci13xxx_imx_remove
),
258 .owner
= THIS_MODULE
,
259 .of_match_table
= ci13xxx_imx_dt_ids
,
263 module_platform_driver(ci13xxx_imx_driver
);
265 MODULE_ALIAS("platform:imx-usb");
266 MODULE_LICENSE("GPL v2");
267 MODULE_DESCRIPTION("CI13xxx i.MX USB binding");
268 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
269 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");