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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 | |
8e22978c | 26 | struct ci_hdrc_imx_data { |
15302800 RZ |
27 | struct usb_phy *phy; |
28 | struct platform_device *ci_pdev; | |
29 | struct clk *clk; | |
05986ba9 | 30 | struct imx_usbmisc_data *usbmisc_data; |
15302800 RZ |
31 | }; |
32 | ||
d142d6be RZ |
33 | /* Common functions shared by usbmisc drivers */ |
34 | ||
05986ba9 | 35 | static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev) |
d142d6be RZ |
36 | { |
37 | struct device_node *np = dev->of_node; | |
38 | struct of_phandle_args args; | |
05986ba9 | 39 | struct imx_usbmisc_data *data; |
d142d6be RZ |
40 | int ret; |
41 | ||
05986ba9 SH |
42 | /* |
43 | * In case the fsl,usbmisc property is not present this device doesn't | |
44 | * need usbmisc. Return NULL (which is no error here) | |
45 | */ | |
46 | if (!of_get_property(np, "fsl,usbmisc", NULL)) | |
47 | return NULL; | |
48 | ||
49 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
50 | if (!data) | |
51 | return ERR_PTR(-ENOMEM); | |
d142d6be RZ |
52 | |
53 | ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", | |
54 | 0, &args); | |
55 | if (ret) { | |
56 | dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", | |
57 | ret); | |
05986ba9 | 58 | return ERR_PTR(ret); |
d142d6be | 59 | } |
05986ba9 SH |
60 | |
61 | data->index = args.args[0]; | |
d142d6be RZ |
62 | of_node_put(args.np); |
63 | ||
64 | if (of_find_property(np, "disable-over-current", NULL)) | |
05986ba9 | 65 | data->disable_oc = 1; |
d142d6be | 66 | |
a0685330 | 67 | if (of_find_property(np, "external-vbus-divider", NULL)) |
05986ba9 | 68 | data->evdo = 1; |
a0685330 | 69 | |
05986ba9 | 70 | return data; |
d142d6be | 71 | } |
d142d6be RZ |
72 | |
73 | /* End of common functions shared by usbmisc drivers*/ | |
74 | ||
8e22978c | 75 | static int ci_hdrc_imx_probe(struct platform_device *pdev) |
15302800 | 76 | { |
8e22978c AS |
77 | struct ci_hdrc_imx_data *data; |
78 | struct ci_hdrc_platform_data pdata = { | |
79 | .name = "ci_hdrc_imx", | |
f6a3b3a3 | 80 | .capoffset = DEF_CAPOFFSET, |
8e22978c | 81 | .flags = CI_HDRC_REQUIRE_TRANSCEIVER | |
8e22978c | 82 | CI_HDRC_DISABLE_STREAMING, |
f6a3b3a3 | 83 | }; |
15302800 RZ |
84 | int ret; |
85 | ||
86 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
87 | if (!data) { | |
8e22978c | 88 | dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n"); |
15302800 RZ |
89 | return -ENOMEM; |
90 | } | |
91 | ||
05986ba9 SH |
92 | data->usbmisc_data = usbmisc_get_init_data(&pdev->dev); |
93 | if (IS_ERR(data->usbmisc_data)) | |
94 | return PTR_ERR(data->usbmisc_data); | |
95 | ||
15302800 RZ |
96 | data->clk = devm_clk_get(&pdev->dev, NULL); |
97 | if (IS_ERR(data->clk)) { | |
98 | dev_err(&pdev->dev, | |
99 | "Failed to get clock, err=%ld\n", PTR_ERR(data->clk)); | |
100 | return PTR_ERR(data->clk); | |
101 | } | |
102 | ||
103 | ret = clk_prepare_enable(data->clk); | |
104 | if (ret) { | |
105 | dev_err(&pdev->dev, | |
106 | "Failed to prepare or enable clock, err=%d\n", ret); | |
107 | return ret; | |
108 | } | |
109 | ||
046916de | 110 | data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0); |
af59a8b1 PC |
111 | if (IS_ERR(data->phy)) { |
112 | ret = PTR_ERR(data->phy); | |
ea1418b5 | 113 | goto err_clk; |
15302800 RZ |
114 | } |
115 | ||
f6a3b3a3 | 116 | pdata.phy = data->phy; |
15302800 | 117 | |
3b9561e9 SW |
118 | if (!pdev->dev.dma_mask) |
119 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; | |
120 | if (!pdev->dev.coherent_dma_mask) | |
121 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
d142d6be | 122 | |
05986ba9 SH |
123 | if (data->usbmisc_data) { |
124 | ret = imx_usbmisc_init(data->usbmisc_data); | |
d142d6be | 125 | if (ret) { |
05986ba9 SH |
126 | dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", |
127 | ret); | |
af59a8b1 | 128 | goto err_clk; |
d142d6be RZ |
129 | } |
130 | } | |
131 | ||
8e22978c | 132 | data->ci_pdev = ci_hdrc_add_device(&pdev->dev, |
15302800 | 133 | pdev->resource, pdev->num_resources, |
f6a3b3a3 | 134 | &pdata); |
770719df FE |
135 | if (IS_ERR(data->ci_pdev)) { |
136 | ret = PTR_ERR(data->ci_pdev); | |
15302800 RZ |
137 | dev_err(&pdev->dev, |
138 | "Can't register ci_hdrc platform device, err=%d\n", | |
139 | ret); | |
af59a8b1 | 140 | goto err_clk; |
15302800 RZ |
141 | } |
142 | ||
05986ba9 SH |
143 | if (data->usbmisc_data) { |
144 | ret = imx_usbmisc_init_post(data->usbmisc_data); | |
a0685330 | 145 | if (ret) { |
05986ba9 SH |
146 | dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", |
147 | ret); | |
770719df | 148 | goto disable_device; |
a0685330 MG |
149 | } |
150 | } | |
151 | ||
15302800 RZ |
152 | platform_set_drvdata(pdev, data); |
153 | ||
154 | pm_runtime_no_callbacks(&pdev->dev); | |
155 | pm_runtime_enable(&pdev->dev); | |
156 | ||
157 | return 0; | |
158 | ||
770719df | 159 | disable_device: |
8e22978c | 160 | ci_hdrc_remove_device(data->ci_pdev); |
ea1418b5 | 161 | err_clk: |
15302800 RZ |
162 | clk_disable_unprepare(data->clk); |
163 | return ret; | |
164 | } | |
165 | ||
8e22978c | 166 | static int ci_hdrc_imx_remove(struct platform_device *pdev) |
15302800 | 167 | { |
8e22978c | 168 | struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); |
15302800 RZ |
169 | |
170 | pm_runtime_disable(&pdev->dev); | |
8e22978c | 171 | ci_hdrc_remove_device(data->ci_pdev); |
15302800 RZ |
172 | clk_disable_unprepare(data->clk); |
173 | ||
15302800 RZ |
174 | return 0; |
175 | } | |
176 | ||
8e22978c | 177 | static const struct of_device_id ci_hdrc_imx_dt_ids[] = { |
15302800 RZ |
178 | { .compatible = "fsl,imx27-usb", }, |
179 | { /* sentinel */ } | |
180 | }; | |
8e22978c | 181 | MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids); |
15302800 | 182 | |
8e22978c AS |
183 | static struct platform_driver ci_hdrc_imx_driver = { |
184 | .probe = ci_hdrc_imx_probe, | |
185 | .remove = ci_hdrc_imx_remove, | |
15302800 RZ |
186 | .driver = { |
187 | .name = "imx_usb", | |
188 | .owner = THIS_MODULE, | |
8e22978c | 189 | .of_match_table = ci_hdrc_imx_dt_ids, |
15302800 RZ |
190 | }, |
191 | }; | |
192 | ||
8e22978c | 193 | module_platform_driver(ci_hdrc_imx_driver); |
15302800 RZ |
194 | |
195 | MODULE_ALIAS("platform:imx-usb"); | |
196 | MODULE_LICENSE("GPL v2"); | |
8e22978c | 197 | MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); |
15302800 RZ |
198 | MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); |
199 | MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); |