blob: c2c221a332eb481c907a0a4813b857f8162982d6 [file] [log] [blame]
Lars-Peter Clausen22490712010-06-19 04:08:24 +00001/*
2 * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * You should have received a copy of the GNU General Public License along
10 * with this program; if not, write to the Free Software Foundation, Inc.,
11 * 675 Mass Ave, Cambridge, MA 02139, USA.
12 *
13 */
14
15#include <linux/platform_device.h>
16#include <linux/clk.h>
17#include <linux/regulator/consumer.h>
18
19struct jz4740_ohci_hcd {
20 struct ohci_hcd ohci_hcd;
21
22 struct regulator *vbus;
23 bool vbus_enabled;
24 struct clk *clk;
25};
26
27static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
28{
29 return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
30}
31
32static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd *jz4740_ohci)
33{
34 return container_of((void *)jz4740_ohci, struct usb_hcd, hcd_priv);
35}
36
37static int ohci_jz4740_start(struct usb_hcd *hcd)
38{
39 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
40 int ret;
41
42 ret = ohci_init(ohci);
43 if (ret < 0)
44 return ret;
45
46 ohci->num_ports = 1;
47
48 ret = ohci_run(ohci);
49 if (ret < 0) {
50 dev_err(hcd->self.controller, "Can not start %s",
51 hcd->self.bus_name);
52 ohci_stop(hcd);
53 return ret;
54 }
55 return 0;
56}
57
58static int ohci_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
59 bool enabled)
60{
61 int ret = 0;
62
63 if (!jz4740_ohci->vbus)
64 return 0;
65
66 if (enabled && !jz4740_ohci->vbus_enabled) {
67 ret = regulator_enable(jz4740_ohci->vbus);
68 if (ret)
69 dev_err(jz4740_hcd_to_hcd(jz4740_ohci)->self.controller,
70 "Could not power vbus\n");
71 } else if (!enabled && jz4740_ohci->vbus_enabled) {
72 ret = regulator_disable(jz4740_ohci->vbus);
73 }
74
75 if (ret == 0)
76 jz4740_ohci->vbus_enabled = enabled;
77
78 return ret;
79}
80
81static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
82 u16 wIndex, char *buf, u16 wLength)
83{
84 struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
Laurent Pinchart4d6b5162014-04-14 12:08:13 +020085 int ret = 0;
Lars-Peter Clausen22490712010-06-19 04:08:24 +000086
87 switch (typeReq) {
Laurent Pinchart166cf4a2014-04-14 12:08:14 +020088 case SetPortFeature:
Lars-Peter Clausen22490712010-06-19 04:08:24 +000089 if (wValue == USB_PORT_FEAT_POWER)
90 ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
91 break;
Laurent Pinchart166cf4a2014-04-14 12:08:14 +020092 case ClearPortFeature:
Lars-Peter Clausen22490712010-06-19 04:08:24 +000093 if (wValue == USB_PORT_FEAT_POWER)
94 ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
95 break;
96 }
97
98 if (ret)
99 return ret;
100
101 return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
102}
103
104
105static const struct hc_driver ohci_jz4740_hc_driver = {
106 .description = hcd_name,
107 .product_desc = "JZ4740 OHCI",
108 .hcd_priv_size = sizeof(struct jz4740_ohci_hcd),
109
110 /*
111 * generic hardware linkage
112 */
113 .irq = ohci_irq,
114 .flags = HCD_USB11 | HCD_MEMORY,
115
116 /*
117 * basic lifecycle operations
118 */
119 .start = ohci_jz4740_start,
120 .stop = ohci_stop,
121 .shutdown = ohci_shutdown,
122
123 /*
124 * managing i/o requests and associated device resources
125 */
126 .urb_enqueue = ohci_urb_enqueue,
127 .urb_dequeue = ohci_urb_dequeue,
128 .endpoint_disable = ohci_endpoint_disable,
129
130 /*
131 * scheduling support
132 */
133 .get_frame_number = ohci_get_frame,
134
135 /*
136 * root hub support
137 */
138 .hub_status_data = ohci_hub_status_data,
139 .hub_control = ohci_jz4740_hub_control,
140#ifdef CONFIG_PM
141 .bus_suspend = ohci_bus_suspend,
142 .bus_resume = ohci_bus_resume,
143#endif
144 .start_port_reset = ohci_start_port_reset,
145};
146
147
Bill Pemberton41ac7b32012-11-19 13:21:48 -0500148static int jz4740_ohci_probe(struct platform_device *pdev)
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000149{
150 int ret;
151 struct usb_hcd *hcd;
152 struct jz4740_ohci_hcd *jz4740_ohci;
153 struct resource *res;
154 int irq;
155
156 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
157
158 if (!res) {
159 dev_err(&pdev->dev, "Failed to get platform resource\n");
160 return -ENOENT;
161 }
162
163 irq = platform_get_irq(pdev, 0);
164 if (irq < 0) {
165 dev_err(&pdev->dev, "Failed to get platform irq\n");
166 return irq;
167 }
168
169 hcd = usb_create_hcd(&ohci_jz4740_hc_driver, &pdev->dev, "jz4740");
170 if (!hcd) {
171 dev_err(&pdev->dev, "Failed to create hcd.\n");
172 return -ENOMEM;
173 }
174
175 jz4740_ohci = hcd_to_jz4740_hcd(hcd);
176
Jingoo Hanc81c3b02013-12-11 16:24:17 +0900177 hcd->rsrc_start = res->start;
178 hcd->rsrc_len = resource_size(res);
179
180 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
181 if (IS_ERR(hcd->regs)) {
182 ret = PTR_ERR(hcd->regs);
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000183 goto err_free;
184 }
185
Jingoo Hanc81c3b02013-12-11 16:24:17 +0900186 jz4740_ohci->clk = devm_clk_get(&pdev->dev, "uhc");
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000187 if (IS_ERR(jz4740_ohci->clk)) {
188 ret = PTR_ERR(jz4740_ohci->clk);
189 dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
Jingoo Hanc81c3b02013-12-11 16:24:17 +0900190 goto err_free;
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000191 }
192
Jingoo Hanc81c3b02013-12-11 16:24:17 +0900193 jz4740_ohci->vbus = devm_regulator_get(&pdev->dev, "vbus");
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000194 if (IS_ERR(jz4740_ohci->vbus))
195 jz4740_ohci->vbus = NULL;
196
197
198 clk_set_rate(jz4740_ohci->clk, 48000000);
199 clk_enable(jz4740_ohci->clk);
200 if (jz4740_ohci->vbus)
201 ohci_jz4740_set_vbus_power(jz4740_ohci, true);
202
203 platform_set_drvdata(pdev, hcd);
204
205 ohci_hcd_init(hcd_to_ohci(hcd));
206
207 ret = usb_add_hcd(hcd, irq, 0);
208 if (ret) {
209 dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
210 goto err_disable;
211 }
Peter Chen3c9740a2013-11-05 10:46:02 +0800212 device_wakeup_enable(hcd->self.controller);
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000213
214 return 0;
215
216err_disable:
Jingoo Hanc81c3b02013-12-11 16:24:17 +0900217 if (jz4740_ohci->vbus)
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000218 regulator_disable(jz4740_ohci->vbus);
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000219 clk_disable(jz4740_ohci->clk);
220
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000221err_free:
222 usb_put_hcd(hcd);
223
224 return ret;
225}
226
Bill Pembertonfb4e98a2012-11-19 13:26:20 -0500227static int jz4740_ohci_remove(struct platform_device *pdev)
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000228{
229 struct usb_hcd *hcd = platform_get_drvdata(pdev);
230 struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
231
232 usb_remove_hcd(hcd);
233
Jingoo Hanc81c3b02013-12-11 16:24:17 +0900234 if (jz4740_ohci->vbus)
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000235 regulator_disable(jz4740_ohci->vbus);
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000236
237 clk_disable(jz4740_ohci->clk);
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000238
239 usb_put_hcd(hcd);
240
241 return 0;
242}
243
244static struct platform_driver ohci_hcd_jz4740_driver = {
245 .probe = jz4740_ohci_probe,
Bill Pemberton76904172012-11-19 13:21:08 -0500246 .remove = jz4740_ohci_remove,
Lars-Peter Clausen22490712010-06-19 04:08:24 +0000247 .driver = {
248 .name = "jz4740-ohci",
249 .owner = THIS_MODULE,
250 },
251};
252
Stefan Weil1c0a3802010-11-07 22:14:31 +0100253MODULE_ALIAS("platform:jz4740-ohci");