blob: 1bf5e7a4e73551749803a85aed745e0b47898763 [file] [log] [blame]
Lennert Buytenheka5b74742006-06-23 23:02:01 +02001/*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
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
7 *
8 * Bus Glue for ep93xx.
9 *
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Russell King et al.
12 *
13 * Modified for LH7A404 from ohci-sa1111.c
14 * by Durgesh Pattamatta <pattamattad@sharpsec.com>
15 *
16 * Modified for pxa27x from ohci-lh7a404.c
17 * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
18 *
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
22 *
23 * This file is licenced under the GPL.
24 */
25
26#include <linux/clk.h>
27#include <linux/device.h>
28#include <linux/signal.h>
29#include <linux/platform_device.h>
30
31#include <asm/mach-types.h>
32#include <asm/hardware.h>
33
34static struct clk *usb_host_clock;
35
36static void ep93xx_start_hc(struct device *dev)
37{
38 clk_enable(usb_host_clock);
39}
40
41static void ep93xx_stop_hc(struct device *dev)
42{
43 clk_disable(usb_host_clock);
44}
45
46static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
47 struct platform_device *pdev)
48{
49 int retval;
50 struct usb_hcd *hcd;
51
52 if (pdev->resource[1].flags != IORESOURCE_IRQ) {
53 pr_debug("resource[1] is not IORESOURCE_IRQ");
54 return -ENOMEM;
55 }
56
57 hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
58 if (hcd == NULL)
59 return -ENOMEM;
60
61 hcd->rsrc_start = pdev->resource[0].start;
62 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
63 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
64 usb_put_hcd(hcd);
65 retval = -EBUSY;
66 goto err1;
67 }
68
69 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
70 if (hcd->regs == NULL) {
71 pr_debug("ioremap failed");
72 retval = -ENOMEM;
73 goto err2;
74 }
75
76 usb_host_clock = clk_get(&pdev->dev, "usb_host");
77 ep93xx_start_hc(&pdev->dev);
78
79 ohci_hcd_init(hcd_to_ohci(hcd));
80
81 retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
82 if (retval == 0)
83 return retval;
84
85 ep93xx_stop_hc(&pdev->dev);
86 iounmap(hcd->regs);
87err2:
88 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
89err1:
90 usb_put_hcd(hcd);
91
92 return retval;
93}
94
95static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
96 struct platform_device *pdev)
97{
98 usb_remove_hcd(hcd);
99 ep93xx_stop_hc(&pdev->dev);
100 clk_put(usb_host_clock);
101 iounmap(hcd->regs);
102 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
103 usb_put_hcd(hcd);
104}
105
106static int __devinit ohci_ep93xx_start(struct usb_hcd *hcd)
107{
108 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
109 int ret;
110
111 if ((ret = ohci_init(ohci)) < 0)
112 return ret;
113
114 if ((ret = ohci_run(ohci)) < 0) {
115 err("can't start %s", hcd->self.bus_name);
116 ohci_stop(hcd);
117 return ret;
118 }
119
120 return 0;
121}
122
123static struct hc_driver ohci_ep93xx_hc_driver = {
124 .description = hcd_name,
125 .product_desc = "EP93xx OHCI",
126 .hcd_priv_size = sizeof(struct ohci_hcd),
127 .irq = ohci_irq,
128 .flags = HCD_USB11 | HCD_MEMORY,
129 .start = ohci_ep93xx_start,
130 .stop = ohci_stop,
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700131 .shutdown = ohci_shutdown,
Lennert Buytenheka5b74742006-06-23 23:02:01 +0200132 .urb_enqueue = ohci_urb_enqueue,
133 .urb_dequeue = ohci_urb_dequeue,
134 .endpoint_disable = ohci_endpoint_disable,
135 .get_frame_number = ohci_get_frame,
136 .hub_status_data = ohci_hub_status_data,
137 .hub_control = ohci_hub_control,
David Brownelld4139842006-08-04 11:31:55 -0700138 .hub_irq_enable = ohci_rhsc_enable,
Lennert Buytenheka5b74742006-06-23 23:02:01 +0200139#ifdef CONFIG_PM
140 .bus_suspend = ohci_bus_suspend,
141 .bus_resume = ohci_bus_resume,
142#endif
143 .start_port_reset = ohci_start_port_reset,
144};
145
146extern int usb_disabled(void);
147
148static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
149{
150 int ret;
151
152 ret = -ENODEV;
153 if (!usb_disabled())
154 ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
155
156 return ret;
157}
158
159static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
160{
161 struct usb_hcd *hcd = platform_get_drvdata(pdev);
162
163 usb_hcd_ep93xx_remove(hcd, pdev);
164
165 return 0;
166}
167
168#ifdef CONFIG_PM
169static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
170{
171 struct usb_hcd *hcd = platform_get_drvdata(pdev);
172 struct ochi_hcd *ohci = hcd_to_ohci(hcd);
173
174 if (time_before(jiffies, ohci->next_statechange))
175 msleep(5);
176 ohci->next_statechange = jiffies;
177
178 ep93xx_stop_hc(&pdev->dev);
179 hcd->state = HC_STATE_SUSPENDED;
180 pdev->dev.power.power_state = PMSG_SUSPEND;
181
182 return 0;
183}
184
185static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
186{
187 struct usb_hcd *hcd = platform_get_drvdata(pdev);
188 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
189 int status;
190
191 if (time_before(jiffies, ohci->next_statechange))
192 msleep(5);
193 ohci->next_statechange = jiffies;
194
195 ep93xx_start_hc(&pdev->dev);
196 pdev->dev.power.power_state = PMSG_ON;
197 usb_hcd_resume_root_hub(hcd);
198
199 return 0;
200}
201#endif
202
203
204static struct platform_driver ohci_hcd_ep93xx_driver = {
205 .probe = ohci_hcd_ep93xx_drv_probe,
206 .remove = ohci_hcd_ep93xx_drv_remove,
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700207 .shutdown = usb_hcd_platform_shutdown,
Lennert Buytenheka5b74742006-06-23 23:02:01 +0200208#ifdef CONFIG_PM
209 .suspend = ohci_hcd_ep93xx_drv_suspend,
210 .resume = ohci_hcd_ep93xx_drv_resume,
211#endif
212 .driver = {
213 .name = "ep93xx-ohci",
214 },
215};
216
217static int __init ohci_hcd_ep93xx_init(void)
218{
219 return platform_driver_register(&ohci_hcd_ep93xx_driver);
220}
221
222static void __exit ohci_hcd_ep93xx_cleanup(void)
223{
224 platform_driver_unregister(&ohci_hcd_ep93xx_driver);
225}
226
227module_init(ohci_hcd_ep93xx_init);
228module_exit(ohci_hcd_ep93xx_cleanup);