procfs: do not confuse jiffies with cputime64_t
[zen-stable.git] / drivers / usb / host / ohci-jz4740.c
blob931d588c3fb57ccea160bfde8ef51468cfd46467
1 /*
2 * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
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.
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.
15 #include <linux/platform_device.h>
16 #include <linux/clk.h>
17 #include <linux/regulator/consumer.h>
19 struct jz4740_ohci_hcd {
20 struct ohci_hcd ohci_hcd;
22 struct regulator *vbus;
23 bool vbus_enabled;
24 struct clk *clk;
27 static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
29 return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
32 static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd *jz4740_ohci)
34 return container_of((void *)jz4740_ohci, struct usb_hcd, hcd_priv);
37 static int ohci_jz4740_start(struct usb_hcd *hcd)
39 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
40 int ret;
42 ret = ohci_init(ohci);
43 if (ret < 0)
44 return ret;
46 ohci->num_ports = 1;
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;
55 return 0;
58 static int ohci_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
59 bool enabled)
61 int ret = 0;
63 if (!jz4740_ohci->vbus)
64 return 0;
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);
75 if (ret == 0)
76 jz4740_ohci->vbus_enabled = enabled;
78 return ret;
81 static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
82 u16 wIndex, char *buf, u16 wLength)
84 struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
85 int ret;
87 switch (typeReq) {
88 case SetHubFeature:
89 if (wValue == USB_PORT_FEAT_POWER)
90 ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
91 break;
92 case ClearHubFeature:
93 if (wValue == USB_PORT_FEAT_POWER)
94 ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
95 break;
98 if (ret)
99 return ret;
101 return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
105 static 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),
111 * generic hardware linkage
113 .irq = ohci_irq,
114 .flags = HCD_USB11 | HCD_MEMORY,
117 * basic lifecycle operations
119 .start = ohci_jz4740_start,
120 .stop = ohci_stop,
121 .shutdown = ohci_shutdown,
124 * managing i/o requests and associated device resources
126 .urb_enqueue = ohci_urb_enqueue,
127 .urb_dequeue = ohci_urb_dequeue,
128 .endpoint_disable = ohci_endpoint_disable,
131 * scheduling support
133 .get_frame_number = ohci_get_frame,
136 * root hub support
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,
148 static __devinit int jz4740_ohci_probe(struct platform_device *pdev)
150 int ret;
151 struct usb_hcd *hcd;
152 struct jz4740_ohci_hcd *jz4740_ohci;
153 struct resource *res;
154 int irq;
156 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
158 if (!res) {
159 dev_err(&pdev->dev, "Failed to get platform resource\n");
160 return -ENOENT;
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;
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;
175 jz4740_ohci = hcd_to_jz4740_hcd(hcd);
177 res = request_mem_region(res->start, resource_size(res), hcd_name);
178 if (!res) {
179 dev_err(&pdev->dev, "Failed to request mem region.\n");
180 ret = -EBUSY;
181 goto err_free;
184 hcd->rsrc_start = res->start;
185 hcd->rsrc_len = resource_size(res);
186 hcd->regs = ioremap(res->start, resource_size(res));
188 if (!hcd->regs) {
189 dev_err(&pdev->dev, "Failed to ioremap registers.\n");
190 ret = -EBUSY;
191 goto err_release_mem;
194 jz4740_ohci->clk = clk_get(&pdev->dev, "uhc");
195 if (IS_ERR(jz4740_ohci->clk)) {
196 ret = PTR_ERR(jz4740_ohci->clk);
197 dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
198 goto err_iounmap;
201 jz4740_ohci->vbus = regulator_get(&pdev->dev, "vbus");
202 if (IS_ERR(jz4740_ohci->vbus))
203 jz4740_ohci->vbus = NULL;
206 clk_set_rate(jz4740_ohci->clk, 48000000);
207 clk_enable(jz4740_ohci->clk);
208 if (jz4740_ohci->vbus)
209 ohci_jz4740_set_vbus_power(jz4740_ohci, true);
211 platform_set_drvdata(pdev, hcd);
213 ohci_hcd_init(hcd_to_ohci(hcd));
215 ret = usb_add_hcd(hcd, irq, 0);
216 if (ret) {
217 dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
218 goto err_disable;
221 return 0;
223 err_disable:
224 platform_set_drvdata(pdev, NULL);
225 if (jz4740_ohci->vbus) {
226 regulator_disable(jz4740_ohci->vbus);
227 regulator_put(jz4740_ohci->vbus);
229 clk_disable(jz4740_ohci->clk);
231 clk_put(jz4740_ohci->clk);
232 err_iounmap:
233 iounmap(hcd->regs);
234 err_release_mem:
235 release_mem_region(res->start, resource_size(res));
236 err_free:
237 usb_put_hcd(hcd);
239 return ret;
242 static __devexit int jz4740_ohci_remove(struct platform_device *pdev)
244 struct usb_hcd *hcd = platform_get_drvdata(pdev);
245 struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
247 usb_remove_hcd(hcd);
249 platform_set_drvdata(pdev, NULL);
251 if (jz4740_ohci->vbus) {
252 regulator_disable(jz4740_ohci->vbus);
253 regulator_put(jz4740_ohci->vbus);
256 clk_disable(jz4740_ohci->clk);
257 clk_put(jz4740_ohci->clk);
259 iounmap(hcd->regs);
260 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
262 usb_put_hcd(hcd);
264 return 0;
267 static struct platform_driver ohci_hcd_jz4740_driver = {
268 .probe = jz4740_ohci_probe,
269 .remove = __devexit_p(jz4740_ohci_remove),
270 .driver = {
271 .name = "jz4740-ohci",
272 .owner = THIS_MODULE,
276 MODULE_ALIAS("platform:jz4740-ohci");