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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, |
947c8859 | 109 | .flags = CI_HDRC_DISABLE_STREAMING, |
f6a3b3a3 | 110 | }; |
15302800 | 111 | int ret; |
1071055e PC |
112 | const struct of_device_id *of_id = |
113 | of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev); | |
114 | const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data; | |
15302800 RZ |
115 | |
116 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
73529828 | 117 | if (!data) |
15302800 | 118 | return -ENOMEM; |
15302800 | 119 | |
05986ba9 SH |
120 | data->usbmisc_data = usbmisc_get_init_data(&pdev->dev); |
121 | if (IS_ERR(data->usbmisc_data)) | |
122 | return PTR_ERR(data->usbmisc_data); | |
123 | ||
15302800 RZ |
124 | data->clk = devm_clk_get(&pdev->dev, NULL); |
125 | if (IS_ERR(data->clk)) { | |
126 | dev_err(&pdev->dev, | |
127 | "Failed to get clock, err=%ld\n", PTR_ERR(data->clk)); | |
128 | return PTR_ERR(data->clk); | |
129 | } | |
130 | ||
131 | ret = clk_prepare_enable(data->clk); | |
132 | if (ret) { | |
133 | dev_err(&pdev->dev, | |
134 | "Failed to prepare or enable clock, err=%d\n", ret); | |
135 | return ret; | |
136 | } | |
137 | ||
046916de | 138 | data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0); |
af59a8b1 PC |
139 | if (IS_ERR(data->phy)) { |
140 | ret = PTR_ERR(data->phy); | |
16853d7b MP |
141 | /* Return -EINVAL if no usbphy is available */ |
142 | if (ret == -ENODEV) | |
143 | ret = -EINVAL; | |
ea1418b5 | 144 | goto err_clk; |
15302800 RZ |
145 | } |
146 | ||
ef44cb42 | 147 | pdata.usb_phy = data->phy; |
15302800 | 148 | |
1071055e PC |
149 | if (imx_platform_flag->flags & CI_HDRC_IMX_IMX28_WRITE_FIX) |
150 | pdata.flags |= CI_HDRC_IMX28_WRITE_FIX; | |
151 | ||
e1fd7341 | 152 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
153 | if (ret) |
154 | goto err_clk; | |
d142d6be | 155 | |
05986ba9 SH |
156 | if (data->usbmisc_data) { |
157 | ret = imx_usbmisc_init(data->usbmisc_data); | |
d142d6be | 158 | if (ret) { |
05986ba9 SH |
159 | dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", |
160 | ret); | |
af59a8b1 | 161 | goto err_clk; |
d142d6be RZ |
162 | } |
163 | } | |
164 | ||
8e22978c | 165 | data->ci_pdev = ci_hdrc_add_device(&pdev->dev, |
15302800 | 166 | pdev->resource, pdev->num_resources, |
f6a3b3a3 | 167 | &pdata); |
770719df FE |
168 | if (IS_ERR(data->ci_pdev)) { |
169 | ret = PTR_ERR(data->ci_pdev); | |
15302800 RZ |
170 | dev_err(&pdev->dev, |
171 | "Can't register ci_hdrc platform device, err=%d\n", | |
172 | ret); | |
af59a8b1 | 173 | goto err_clk; |
15302800 RZ |
174 | } |
175 | ||
05986ba9 SH |
176 | if (data->usbmisc_data) { |
177 | ret = imx_usbmisc_init_post(data->usbmisc_data); | |
a0685330 | 178 | if (ret) { |
05986ba9 SH |
179 | dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", |
180 | ret); | |
770719df | 181 | goto disable_device; |
a0685330 MG |
182 | } |
183 | } | |
184 | ||
15302800 RZ |
185 | platform_set_drvdata(pdev, data); |
186 | ||
187 | pm_runtime_no_callbacks(&pdev->dev); | |
188 | pm_runtime_enable(&pdev->dev); | |
189 | ||
190 | return 0; | |
191 | ||
770719df | 192 | disable_device: |
8e22978c | 193 | ci_hdrc_remove_device(data->ci_pdev); |
ea1418b5 | 194 | err_clk: |
15302800 RZ |
195 | clk_disable_unprepare(data->clk); |
196 | return ret; | |
197 | } | |
198 | ||
8e22978c | 199 | static int ci_hdrc_imx_remove(struct platform_device *pdev) |
15302800 | 200 | { |
8e22978c | 201 | struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); |
15302800 RZ |
202 | |
203 | pm_runtime_disable(&pdev->dev); | |
8e22978c | 204 | ci_hdrc_remove_device(data->ci_pdev); |
15302800 RZ |
205 | clk_disable_unprepare(data->clk); |
206 | ||
15302800 RZ |
207 | return 0; |
208 | } | |
209 | ||
2558c1f5 PC |
210 | #ifdef CONFIG_PM_SLEEP |
211 | static int imx_controller_suspend(struct device *dev) | |
212 | { | |
213 | struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); | |
214 | ||
215 | dev_dbg(dev, "at %s\n", __func__); | |
216 | ||
217 | clk_disable_unprepare(data->clk); | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int imx_controller_resume(struct device *dev) | |
223 | { | |
224 | struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); | |
225 | ||
226 | dev_dbg(dev, "at %s\n", __func__); | |
227 | ||
228 | return clk_prepare_enable(data->clk); | |
229 | } | |
230 | ||
231 | static int ci_hdrc_imx_suspend(struct device *dev) | |
232 | { | |
233 | return imx_controller_suspend(dev); | |
234 | } | |
235 | ||
236 | static int ci_hdrc_imx_resume(struct device *dev) | |
237 | { | |
238 | return imx_controller_resume(dev); | |
239 | } | |
240 | #endif /* CONFIG_PM_SLEEP */ | |
241 | ||
242 | static const struct dev_pm_ops ci_hdrc_imx_pm_ops = { | |
243 | SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume) | |
244 | }; | |
8e22978c AS |
245 | static struct platform_driver ci_hdrc_imx_driver = { |
246 | .probe = ci_hdrc_imx_probe, | |
247 | .remove = ci_hdrc_imx_remove, | |
15302800 RZ |
248 | .driver = { |
249 | .name = "imx_usb", | |
8e22978c | 250 | .of_match_table = ci_hdrc_imx_dt_ids, |
2558c1f5 | 251 | .pm = &ci_hdrc_imx_pm_ops, |
15302800 RZ |
252 | }, |
253 | }; | |
254 | ||
8e22978c | 255 | module_platform_driver(ci_hdrc_imx_driver); |
15302800 RZ |
256 | |
257 | MODULE_ALIAS("platform:imx-usb"); | |
258 | MODULE_LICENSE("GPL v2"); | |
8e22978c | 259 | MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); |
15302800 RZ |
260 | MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); |
261 | MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); |