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15302800 RZ |
1 | /* |
2 | * Copyright 2012 Freescale Semiconductor, Inc. | |
3 | * Copyright (C) 2012 Marek Vasut <marex@denx.de> | |
4 | * on behalf of DENX Software Engineering GmbH | |
5 | * | |
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: | |
9 | * | |
10 | * http://www.opensource.org/licenses/gpl-license.html | |
11 | * http://www.gnu.org/copyleft/gpl.html | |
12 | */ | |
13 | ||
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> | |
15302800 RZ |
22 | |
23 | #include "ci.h" | |
8e22978c | 24 | #include "ci_hdrc_imx.h" |
15302800 | 25 | |
1071055e PC |
26 | #define CI_HDRC_IMX_IMX28_WRITE_FIX BIT(0) |
27 | ||
28 | struct ci_hdrc_imx_platform_flag { | |
29 | unsigned int flags; | |
30 | }; | |
31 | ||
32 | static const struct ci_hdrc_imx_platform_flag imx27_usb_data = { | |
33 | }; | |
34 | ||
35 | static const struct ci_hdrc_imx_platform_flag imx28_usb_data = { | |
36 | .flags = CI_HDRC_IMX_IMX28_WRITE_FIX, | |
37 | }; | |
38 | ||
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}, | |
42 | { /* sentinel */ } | |
43 | }; | |
44 | MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids); | |
45 | ||
8e22978c | 46 | struct ci_hdrc_imx_data { |
15302800 RZ |
47 | struct usb_phy *phy; |
48 | struct platform_device *ci_pdev; | |
49 | struct clk *clk; | |
05986ba9 | 50 | struct imx_usbmisc_data *usbmisc_data; |
15302800 RZ |
51 | }; |
52 | ||
d142d6be RZ |
53 | /* Common functions shared by usbmisc drivers */ |
54 | ||
05986ba9 | 55 | static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev) |
d142d6be | 56 | { |
f40017e0 | 57 | struct platform_device *misc_pdev; |
d142d6be RZ |
58 | struct device_node *np = dev->of_node; |
59 | struct of_phandle_args args; | |
05986ba9 | 60 | struct imx_usbmisc_data *data; |
d142d6be RZ |
61 | int ret; |
62 | ||
05986ba9 SH |
63 | /* |
64 | * In case the fsl,usbmisc property is not present this device doesn't | |
65 | * need usbmisc. Return NULL (which is no error here) | |
66 | */ | |
67 | if (!of_get_property(np, "fsl,usbmisc", NULL)) | |
68 | return NULL; | |
69 | ||
70 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
71 | if (!data) | |
72 | return ERR_PTR(-ENOMEM); | |
d142d6be RZ |
73 | |
74 | ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", | |
75 | 0, &args); | |
76 | if (ret) { | |
77 | dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", | |
78 | ret); | |
05986ba9 | 79 | return ERR_PTR(ret); |
d142d6be | 80 | } |
05986ba9 SH |
81 | |
82 | data->index = args.args[0]; | |
f40017e0 SA |
83 | |
84 | misc_pdev = of_find_device_by_node(args.np); | |
d142d6be RZ |
85 | of_node_put(args.np); |
86 | ||
f40017e0 SA |
87 | if (!misc_pdev) |
88 | return ERR_PTR(-EPROBE_DEFER); | |
89 | ||
90 | data->dev = &misc_pdev->dev; | |
91 | ||
d142d6be | 92 | if (of_find_property(np, "disable-over-current", NULL)) |
05986ba9 | 93 | data->disable_oc = 1; |
d142d6be | 94 | |
a0685330 | 95 | if (of_find_property(np, "external-vbus-divider", NULL)) |
05986ba9 | 96 | data->evdo = 1; |
a0685330 | 97 | |
05986ba9 | 98 | return data; |
d142d6be | 99 | } |
d142d6be RZ |
100 | |
101 | /* End of common functions shared by usbmisc drivers*/ | |
102 | ||
8e22978c | 103 | static int ci_hdrc_imx_probe(struct platform_device *pdev) |
15302800 | 104 | { |
8e22978c AS |
105 | struct ci_hdrc_imx_data *data; |
106 | struct ci_hdrc_platform_data pdata = { | |
c844d6c8 | 107 | .name = dev_name(&pdev->dev), |
f6a3b3a3 | 108 | .capoffset = DEF_CAPOFFSET, |
8e22978c | 109 | .flags = CI_HDRC_REQUIRE_TRANSCEIVER | |
8e22978c | 110 | CI_HDRC_DISABLE_STREAMING, |
f6a3b3a3 | 111 | }; |
15302800 | 112 | int ret; |
1071055e PC |
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; | |
15302800 RZ |
116 | |
117 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
118 | if (!data) { | |
8e22978c | 119 | dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n"); |
15302800 RZ |
120 | return -ENOMEM; |
121 | } | |
122 | ||
05986ba9 SH |
123 | data->usbmisc_data = usbmisc_get_init_data(&pdev->dev); |
124 | if (IS_ERR(data->usbmisc_data)) | |
125 | return PTR_ERR(data->usbmisc_data); | |
126 | ||
15302800 RZ |
127 | data->clk = devm_clk_get(&pdev->dev, NULL); |
128 | if (IS_ERR(data->clk)) { | |
129 | dev_err(&pdev->dev, | |
130 | "Failed to get clock, err=%ld\n", PTR_ERR(data->clk)); | |
131 | return PTR_ERR(data->clk); | |
132 | } | |
133 | ||
134 | ret = clk_prepare_enable(data->clk); | |
135 | if (ret) { | |
136 | dev_err(&pdev->dev, | |
137 | "Failed to prepare or enable clock, err=%d\n", ret); | |
138 | return ret; | |
139 | } | |
140 | ||
046916de | 141 | data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0); |
af59a8b1 PC |
142 | if (IS_ERR(data->phy)) { |
143 | ret = PTR_ERR(data->phy); | |
16853d7b MP |
144 | /* Return -EINVAL if no usbphy is available */ |
145 | if (ret == -ENODEV) | |
146 | ret = -EINVAL; | |
ea1418b5 | 147 | goto err_clk; |
15302800 RZ |
148 | } |
149 | ||
f6a3b3a3 | 150 | pdata.phy = data->phy; |
15302800 | 151 | |
1071055e PC |
152 | if (imx_platform_flag->flags & CI_HDRC_IMX_IMX28_WRITE_FIX) |
153 | pdata.flags |= CI_HDRC_IMX28_WRITE_FIX; | |
154 | ||
e1fd7341 | 155 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
156 | if (ret) |
157 | goto err_clk; | |
d142d6be | 158 | |
05986ba9 SH |
159 | if (data->usbmisc_data) { |
160 | ret = imx_usbmisc_init(data->usbmisc_data); | |
d142d6be | 161 | if (ret) { |
05986ba9 SH |
162 | dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", |
163 | ret); | |
af59a8b1 | 164 | goto err_clk; |
d142d6be RZ |
165 | } |
166 | } | |
167 | ||
8e22978c | 168 | data->ci_pdev = ci_hdrc_add_device(&pdev->dev, |
15302800 | 169 | pdev->resource, pdev->num_resources, |
f6a3b3a3 | 170 | &pdata); |
770719df FE |
171 | if (IS_ERR(data->ci_pdev)) { |
172 | ret = PTR_ERR(data->ci_pdev); | |
15302800 RZ |
173 | dev_err(&pdev->dev, |
174 | "Can't register ci_hdrc platform device, err=%d\n", | |
175 | ret); | |
af59a8b1 | 176 | goto err_clk; |
15302800 RZ |
177 | } |
178 | ||
05986ba9 SH |
179 | if (data->usbmisc_data) { |
180 | ret = imx_usbmisc_init_post(data->usbmisc_data); | |
a0685330 | 181 | if (ret) { |
05986ba9 SH |
182 | dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", |
183 | ret); | |
770719df | 184 | goto disable_device; |
a0685330 MG |
185 | } |
186 | } | |
187 | ||
15302800 RZ |
188 | platform_set_drvdata(pdev, data); |
189 | ||
190 | pm_runtime_no_callbacks(&pdev->dev); | |
191 | pm_runtime_enable(&pdev->dev); | |
192 | ||
193 | return 0; | |
194 | ||
770719df | 195 | disable_device: |
8e22978c | 196 | ci_hdrc_remove_device(data->ci_pdev); |
ea1418b5 | 197 | err_clk: |
15302800 RZ |
198 | clk_disable_unprepare(data->clk); |
199 | return ret; | |
200 | } | |
201 | ||
8e22978c | 202 | static int ci_hdrc_imx_remove(struct platform_device *pdev) |
15302800 | 203 | { |
8e22978c | 204 | struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); |
15302800 RZ |
205 | |
206 | pm_runtime_disable(&pdev->dev); | |
8e22978c | 207 | ci_hdrc_remove_device(data->ci_pdev); |
15302800 RZ |
208 | clk_disable_unprepare(data->clk); |
209 | ||
15302800 RZ |
210 | return 0; |
211 | } | |
212 | ||
8e22978c AS |
213 | static struct platform_driver ci_hdrc_imx_driver = { |
214 | .probe = ci_hdrc_imx_probe, | |
215 | .remove = ci_hdrc_imx_remove, | |
15302800 RZ |
216 | .driver = { |
217 | .name = "imx_usb", | |
218 | .owner = THIS_MODULE, | |
8e22978c | 219 | .of_match_table = ci_hdrc_imx_dt_ids, |
15302800 RZ |
220 | }, |
221 | }; | |
222 | ||
8e22978c | 223 | module_platform_driver(ci_hdrc_imx_driver); |
15302800 RZ |
224 | |
225 | MODULE_ALIAS("platform:imx-usb"); | |
226 | MODULE_LICENSE("GPL v2"); | |
8e22978c | 227 | MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); |
15302800 RZ |
228 | MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); |
229 | MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); |