mm, vmalloc: remove useless variable in vmap_block
[linux/fpc-iii.git] / drivers / usb / host / ohci-ep93xx.c
blob84a20d5223b962b869e0c99499eed28230497822
1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 * (C) Copyright 2002 Hewlett-Packard Company
8 * Bus Glue for ep93xx.
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Russell King et al.
13 * Modified for LH7A404 from ohci-sa1111.c
14 * by Durgesh Pattamatta <pattamattad@sharpsec.com>
16 * Modified for pxa27x from ohci-lh7a404.c
17 * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
19 * Modified for ep93xx from ohci-pxa27x.c
20 * by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
21 * Based on an earlier driver by Ray Lehtiniemi
23 * This file is licenced under the GPL.
26 #include <linux/clk.h>
27 #include <linux/device.h>
28 #include <linux/signal.h>
29 #include <linux/platform_device.h>
31 static struct clk *usb_host_clock;
33 static int ohci_ep93xx_start(struct usb_hcd *hcd)
35 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
36 int ret;
38 if ((ret = ohci_init(ohci)) < 0)
39 return ret;
41 if ((ret = ohci_run(ohci)) < 0) {
42 dev_err(hcd->self.controller, "can't start %s\n",
43 hcd->self.bus_name);
44 ohci_stop(hcd);
45 return ret;
48 return 0;
51 static struct hc_driver ohci_ep93xx_hc_driver = {
52 .description = hcd_name,
53 .product_desc = "EP93xx OHCI",
54 .hcd_priv_size = sizeof(struct ohci_hcd),
55 .irq = ohci_irq,
56 .flags = HCD_USB11 | HCD_MEMORY,
57 .start = ohci_ep93xx_start,
58 .stop = ohci_stop,
59 .shutdown = ohci_shutdown,
60 .urb_enqueue = ohci_urb_enqueue,
61 .urb_dequeue = ohci_urb_dequeue,
62 .endpoint_disable = ohci_endpoint_disable,
63 .get_frame_number = ohci_get_frame,
64 .hub_status_data = ohci_hub_status_data,
65 .hub_control = ohci_hub_control,
66 #ifdef CONFIG_PM
67 .bus_suspend = ohci_bus_suspend,
68 .bus_resume = ohci_bus_resume,
69 #endif
70 .start_port_reset = ohci_start_port_reset,
73 static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
75 struct usb_hcd *hcd;
76 struct resource *res;
77 int irq;
78 int ret;
80 if (usb_disabled())
81 return -ENODEV;
83 irq = platform_get_irq(pdev, 0);
84 if (irq < 0)
85 return irq;
87 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
88 if (!res)
89 return -ENXIO;
91 hcd = usb_create_hcd(&ohci_ep93xx_hc_driver, &pdev->dev, "ep93xx");
92 if (!hcd)
93 return -ENOMEM;
95 hcd->rsrc_start = res->start;
96 hcd->rsrc_len = resource_size(res);
98 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
99 if (IS_ERR(hcd->regs)) {
100 ret = PTR_ERR(hcd->regs);
101 goto err_put_hcd;
104 usb_host_clock = devm_clk_get(&pdev->dev, NULL);
105 if (IS_ERR(usb_host_clock)) {
106 ret = PTR_ERR(usb_host_clock);
107 goto err_put_hcd;
110 clk_enable(usb_host_clock);
112 ohci_hcd_init(hcd_to_ohci(hcd));
114 ret = usb_add_hcd(hcd, irq, 0);
115 if (ret)
116 goto err_clk_disable;
118 return 0;
120 err_clk_disable:
121 clk_disable(usb_host_clock);
122 err_put_hcd:
123 usb_put_hcd(hcd);
125 return ret;
128 static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
130 struct usb_hcd *hcd = platform_get_drvdata(pdev);
132 usb_remove_hcd(hcd);
133 clk_disable(usb_host_clock);
134 usb_put_hcd(hcd);
136 return 0;
139 #ifdef CONFIG_PM
140 static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
142 struct usb_hcd *hcd = platform_get_drvdata(pdev);
143 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
145 if (time_before(jiffies, ohci->next_statechange))
146 msleep(5);
147 ohci->next_statechange = jiffies;
149 clk_disable(usb_host_clock);
150 return 0;
153 static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
155 struct usb_hcd *hcd = platform_get_drvdata(pdev);
156 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
158 if (time_before(jiffies, ohci->next_statechange))
159 msleep(5);
160 ohci->next_statechange = jiffies;
162 clk_enable(usb_host_clock);
164 ohci_resume(hcd, false);
165 return 0;
167 #endif
170 static struct platform_driver ohci_hcd_ep93xx_driver = {
171 .probe = ohci_hcd_ep93xx_drv_probe,
172 .remove = ohci_hcd_ep93xx_drv_remove,
173 .shutdown = usb_hcd_platform_shutdown,
174 #ifdef CONFIG_PM
175 .suspend = ohci_hcd_ep93xx_drv_suspend,
176 .resume = ohci_hcd_ep93xx_drv_resume,
177 #endif
178 .driver = {
179 .name = "ep93xx-ohci",
180 .owner = THIS_MODULE,
184 MODULE_ALIAS("platform:ep93xx-ohci");