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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> | |
22 | #include <linux/regulator/consumer.h> | |
b4dbb258 | 23 | #include <linux/pinctrl/consumer.h> |
15302800 RZ |
24 | |
25 | #include "ci.h" | |
d142d6be | 26 | #include "ci13xxx_imx.h" |
15302800 RZ |
27 | |
28 | #define pdev_to_phy(pdev) \ | |
29 | ((struct usb_phy *)platform_get_drvdata(pdev)) | |
30 | ||
31 | struct ci13xxx_imx_data { | |
32 | struct device_node *phy_np; | |
33 | struct usb_phy *phy; | |
34 | struct platform_device *ci_pdev; | |
35 | struct clk *clk; | |
36 | struct regulator *reg_vbus; | |
37 | }; | |
38 | ||
d142d6be RZ |
39 | static const struct usbmisc_ops *usbmisc_ops; |
40 | ||
41 | /* Common functions shared by usbmisc drivers */ | |
42 | ||
43 | int usbmisc_set_ops(const struct usbmisc_ops *ops) | |
44 | { | |
45 | if (usbmisc_ops) | |
46 | return -EBUSY; | |
47 | ||
48 | usbmisc_ops = ops; | |
49 | ||
50 | return 0; | |
51 | } | |
52 | EXPORT_SYMBOL_GPL(usbmisc_set_ops); | |
53 | ||
54 | void usbmisc_unset_ops(const struct usbmisc_ops *ops) | |
55 | { | |
56 | usbmisc_ops = NULL; | |
57 | } | |
58 | EXPORT_SYMBOL_GPL(usbmisc_unset_ops); | |
59 | ||
60 | int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev) | |
61 | { | |
62 | struct device_node *np = dev->of_node; | |
63 | struct of_phandle_args args; | |
64 | int ret; | |
65 | ||
66 | usbdev->dev = dev; | |
67 | ||
68 | ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", | |
69 | 0, &args); | |
70 | if (ret) { | |
71 | dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", | |
72 | ret); | |
73 | memset(usbdev, 0, sizeof(*usbdev)); | |
74 | return ret; | |
75 | } | |
76 | usbdev->index = args.args[0]; | |
77 | of_node_put(args.np); | |
78 | ||
79 | if (of_find_property(np, "disable-over-current", NULL)) | |
80 | usbdev->disable_oc = 1; | |
81 | ||
82 | return 0; | |
83 | } | |
84 | EXPORT_SYMBOL_GPL(usbmisc_get_init_data); | |
85 | ||
86 | /* End of common functions shared by usbmisc drivers*/ | |
87 | ||
15302800 RZ |
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, | |
94 | }; | |
95 | ||
96 | static int __devinit ci13xxx_imx_probe(struct platform_device *pdev) | |
97 | { | |
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; | |
b4dbb258 | 103 | struct pinctrl *pinctrl; |
15302800 RZ |
104 | int ret; |
105 | ||
d142d6be RZ |
106 | if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL) |
107 | && !usbmisc_ops) | |
108 | return -EPROBE_DEFER; | |
109 | ||
15302800 RZ |
110 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); |
111 | if (!data) { | |
112 | dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n"); | |
113 | return -ENOMEM; | |
114 | } | |
115 | ||
116 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
117 | if (!res) { | |
118 | dev_err(&pdev->dev, "Can't get device resources!\n"); | |
119 | return -ENOENT; | |
120 | } | |
121 | ||
b4dbb258 RZ |
122 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); |
123 | if (IS_ERR(pinctrl)) | |
124 | dev_warn(&pdev->dev, "pinctrl get/select failed, err=%ld\n", | |
125 | PTR_ERR(pinctrl)); | |
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 | ||
141 | phy_np = of_parse_phandle(pdev->dev.of_node, "fsl,usbphy", 0); | |
142 | if (phy_np) { | |
143 | data->phy_np = phy_np; | |
144 | phy_pdev = of_find_device_by_node(phy_np); | |
145 | if (phy_pdev) { | |
146 | struct usb_phy *phy; | |
147 | phy = pdev_to_phy(phy_pdev); | |
148 | if (phy && | |
149 | try_module_get(phy_pdev->dev.driver->owner)) { | |
150 | usb_phy_init(phy); | |
151 | data->phy = phy; | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
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); | |
160 | if (ret) { | |
161 | dev_err(&pdev->dev, | |
162 | "Failed to enable vbus regulator, err=%d\n", | |
163 | ret); | |
164 | goto put_np; | |
165 | } | |
166 | data->reg_vbus = reg_vbus; | |
167 | } else { | |
168 | reg_vbus = NULL; | |
169 | } | |
170 | ||
171 | ci13xxx_imx_platdata.phy = data->phy; | |
172 | ||
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) { | |
177 | ret = -ENOMEM; | |
178 | dev_err(&pdev->dev, "Failed to alloc dma_mask!\n"); | |
179 | goto err; | |
180 | } | |
181 | *pdev->dev.dma_mask = DMA_BIT_MASK(32); | |
182 | dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask); | |
183 | } | |
d142d6be RZ |
184 | |
185 | if (usbmisc_ops && usbmisc_ops->init) { | |
186 | ret = usbmisc_ops->init(&pdev->dev); | |
187 | if (ret) { | |
188 | dev_err(&pdev->dev, | |
189 | "usbmisc init failed, ret=%d\n", ret); | |
190 | goto err; | |
191 | } | |
192 | } | |
193 | ||
15302800 RZ |
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); | |
199 | dev_err(&pdev->dev, | |
200 | "Can't register ci_hdrc platform device, err=%d\n", | |
201 | ret); | |
202 | goto err; | |
203 | } | |
204 | ||
205 | data->ci_pdev = plat_ci; | |
206 | platform_set_drvdata(pdev, data); | |
207 | ||
208 | pm_runtime_no_callbacks(&pdev->dev); | |
209 | pm_runtime_enable(&pdev->dev); | |
210 | ||
211 | return 0; | |
212 | ||
213 | err: | |
214 | if (reg_vbus) | |
215 | regulator_disable(reg_vbus); | |
216 | put_np: | |
217 | if (phy_np) | |
218 | of_node_put(phy_np); | |
219 | clk_disable_unprepare(data->clk); | |
220 | return ret; | |
221 | } | |
222 | ||
223 | static int __devexit ci13xxx_imx_remove(struct platform_device *pdev) | |
224 | { | |
225 | struct ci13xxx_imx_data *data = platform_get_drvdata(pdev); | |
226 | ||
227 | pm_runtime_disable(&pdev->dev); | |
228 | ci13xxx_remove_device(data->ci_pdev); | |
229 | ||
230 | if (data->reg_vbus) | |
231 | regulator_disable(data->reg_vbus); | |
232 | ||
233 | if (data->phy) { | |
234 | usb_phy_shutdown(data->phy); | |
235 | module_put(data->phy->dev->driver->owner); | |
236 | } | |
237 | ||
238 | of_node_put(data->phy_np); | |
239 | ||
240 | clk_disable_unprepare(data->clk); | |
241 | ||
242 | platform_set_drvdata(pdev, NULL); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static const struct of_device_id ci13xxx_imx_dt_ids[] = { | |
248 | { .compatible = "fsl,imx27-usb", }, | |
249 | { /* sentinel */ } | |
250 | }; | |
251 | MODULE_DEVICE_TABLE(of, ci13xxx_imx_dt_ids); | |
252 | ||
253 | static struct platform_driver ci13xxx_imx_driver = { | |
254 | .probe = ci13xxx_imx_probe, | |
255 | .remove = __devexit_p(ci13xxx_imx_remove), | |
256 | .driver = { | |
257 | .name = "imx_usb", | |
258 | .owner = THIS_MODULE, | |
259 | .of_match_table = ci13xxx_imx_dt_ids, | |
260 | }, | |
261 | }; | |
262 | ||
263 | module_platform_driver(ci13xxx_imx_driver); | |
264 | ||
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>"); |