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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
23#include "ci.h"
24#include "ci_hdrc_imx.h"
25
26#define CI_HDRC_IMX_IMX28_WRITE_FIX BIT(0)
27
28struct ci_hdrc_imx_platform_flag {
29 unsigned int flags;
30};
31
32static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
33};
34
35static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
36 .flags = CI_HDRC_IMX_IMX28_WRITE_FIX,
37};
38
39static 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},
42 { }
43};
44MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
45
46struct ci_hdrc_imx_data {
47 struct usb_phy *phy;
48 struct platform_device *ci_pdev;
49 struct clk *clk;
50 struct imx_usbmisc_data *usbmisc_data;
51};
52
53
54
55static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
56{
57 struct device_node *np = dev->of_node;
58 struct of_phandle_args args;
59 struct imx_usbmisc_data *data;
60 int ret;
61
62
63
64
65
66 if (!of_get_property(np, "fsl,usbmisc", NULL))
67 return NULL;
68
69 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
70 if (!data)
71 return ERR_PTR(-ENOMEM);
72
73 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
74 0, &args);
75 if (ret) {
76 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
77 ret);
78 return ERR_PTR(ret);
79 }
80
81 data->index = args.args[0];
82 of_node_put(args.np);
83
84 if (of_find_property(np, "disable-over-current", NULL))
85 data->disable_oc = 1;
86
87 if (of_find_property(np, "external-vbus-divider", NULL))
88 data->evdo = 1;
89
90 return data;
91}
92
93
94
95static int ci_hdrc_imx_probe(struct platform_device *pdev)
96{
97 struct ci_hdrc_imx_data *data;
98 struct ci_hdrc_platform_data pdata = {
99 .name = dev_name(&pdev->dev),
100 .capoffset = DEF_CAPOFFSET,
101 .flags = CI_HDRC_REQUIRE_TRANSCEIVER |
102 CI_HDRC_DISABLE_STREAMING,
103 };
104 int ret;
105 const struct of_device_id *of_id =
106 of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
107 const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
108
109 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
110 if (!data) {
111 dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
112 return -ENOMEM;
113 }
114
115 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
116 if (IS_ERR(data->usbmisc_data))
117 return PTR_ERR(data->usbmisc_data);
118
119 data->clk = devm_clk_get(&pdev->dev, NULL);
120 if (IS_ERR(data->clk)) {
121 dev_err(&pdev->dev,
122 "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
123 return PTR_ERR(data->clk);
124 }
125
126 ret = clk_prepare_enable(data->clk);
127 if (ret) {
128 dev_err(&pdev->dev,
129 "Failed to prepare or enable clock, err=%d\n", ret);
130 return ret;
131 }
132
133 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
134 if (IS_ERR(data->phy)) {
135 ret = PTR_ERR(data->phy);
136 goto err_clk;
137 }
138
139 pdata.phy = data->phy;
140
141 if (imx_platform_flag->flags & CI_HDRC_IMX_IMX28_WRITE_FIX)
142 pdata.flags |= CI_HDRC_IMX28_WRITE_FIX;
143
144 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
145 if (ret)
146 goto err_clk;
147
148 if (data->usbmisc_data) {
149 ret = imx_usbmisc_init(data->usbmisc_data);
150 if (ret) {
151 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n",
152 ret);
153 goto err_clk;
154 }
155 }
156
157 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
158 pdev->resource, pdev->num_resources,
159 &pdata);
160 if (IS_ERR(data->ci_pdev)) {
161 ret = PTR_ERR(data->ci_pdev);
162 dev_err(&pdev->dev,
163 "Can't register ci_hdrc platform device, err=%d\n",
164 ret);
165 goto err_clk;
166 }
167
168 if (data->usbmisc_data) {
169 ret = imx_usbmisc_init_post(data->usbmisc_data);
170 if (ret) {
171 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n",
172 ret);
173 goto disable_device;
174 }
175 }
176
177 platform_set_drvdata(pdev, data);
178
179 pm_runtime_no_callbacks(&pdev->dev);
180 pm_runtime_enable(&pdev->dev);
181
182 return 0;
183
184disable_device:
185 ci_hdrc_remove_device(data->ci_pdev);
186err_clk:
187 clk_disable_unprepare(data->clk);
188 return ret;
189}
190
191static int ci_hdrc_imx_remove(struct platform_device *pdev)
192{
193 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
194
195 pm_runtime_disable(&pdev->dev);
196 ci_hdrc_remove_device(data->ci_pdev);
197 clk_disable_unprepare(data->clk);
198
199 return 0;
200}
201
202static struct platform_driver ci_hdrc_imx_driver = {
203 .probe = ci_hdrc_imx_probe,
204 .remove = ci_hdrc_imx_remove,
205 .driver = {
206 .name = "imx_usb",
207 .owner = THIS_MODULE,
208 .of_match_table = ci_hdrc_imx_dt_ids,
209 },
210};
211
212module_platform_driver(ci_hdrc_imx_driver);
213
214MODULE_ALIAS("platform:imx-usb");
215MODULE_LICENSE("GPL v2");
216MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
217MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
218MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
219
