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a5b7474a LB |
1 | /* |
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 | ||
34 | static struct clk *usb_host_clock; | |
35 | ||
36 | static void ep93xx_start_hc(struct device *dev) | |
37 | { | |
38 | clk_enable(usb_host_clock); | |
39 | } | |
40 | ||
41 | static void ep93xx_stop_hc(struct device *dev) | |
42 | { | |
43 | clk_disable(usb_host_clock); | |
44 | } | |
45 | ||
46 | static 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 | ||
38515e90 | 81 | retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED); |
a5b7474a LB |
82 | if (retval == 0) |
83 | return retval; | |
84 | ||
85 | ep93xx_stop_hc(&pdev->dev); | |
86 | iounmap(hcd->regs); | |
87 | err2: | |
88 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
89 | err1: | |
90 | usb_put_hcd(hcd); | |
91 | ||
92 | return retval; | |
93 | } | |
94 | ||
95 | static 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 | ||
106 | static 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 | ||
123 | static 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, | |
64a21d02 | 131 | .shutdown = ohci_shutdown, |
a5b7474a LB |
132 | .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, | |
d413984a | 138 | .hub_irq_enable = ohci_rhsc_enable, |
a5b7474a LB |
139 | #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 | ||
146 | extern int usb_disabled(void); | |
147 | ||
148 | static 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 | ||
159 | static 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 | |
169 | static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
170 | { | |
171 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
caaf2632 | 172 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
a5b7474a LB |
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 | ||
185 | static 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 | ||
204 | static struct platform_driver ohci_hcd_ep93xx_driver = { | |
205 | .probe = ohci_hcd_ep93xx_drv_probe, | |
206 | .remove = ohci_hcd_ep93xx_drv_remove, | |
dd9048af | 207 | .shutdown = usb_hcd_platform_shutdown, |
a5b7474a LB |
208 | #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 |