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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 | ||
a5b7474a LB |
31 | static struct clk *usb_host_clock; |
32 | ||
33 | static void ep93xx_start_hc(struct device *dev) | |
34 | { | |
35 | clk_enable(usb_host_clock); | |
36 | } | |
37 | ||
38 | static void ep93xx_stop_hc(struct device *dev) | |
39 | { | |
40 | clk_disable(usb_host_clock); | |
41 | } | |
42 | ||
43 | static int usb_hcd_ep93xx_probe(const struct hc_driver *driver, | |
44 | struct platform_device *pdev) | |
45 | { | |
46 | int retval; | |
47 | struct usb_hcd *hcd; | |
48 | ||
49 | if (pdev->resource[1].flags != IORESOURCE_IRQ) { | |
1f550c1a | 50 | dev_dbg(&pdev->dev, "resource[1] is not IORESOURCE_IRQ\n"); |
a5b7474a LB |
51 | return -ENOMEM; |
52 | } | |
53 | ||
54 | hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx"); | |
55 | if (hcd == NULL) | |
56 | return -ENOMEM; | |
57 | ||
58 | hcd->rsrc_start = pdev->resource[0].start; | |
59 | hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; | |
60 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
61 | usb_put_hcd(hcd); | |
62 | retval = -EBUSY; | |
63 | goto err1; | |
64 | } | |
65 | ||
66 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
67 | if (hcd->regs == NULL) { | |
1f550c1a | 68 | dev_dbg(&pdev->dev, "ioremap failed\n"); |
a5b7474a LB |
69 | retval = -ENOMEM; |
70 | goto err2; | |
71 | } | |
72 | ||
e3a6d019 HS |
73 | usb_host_clock = clk_get(&pdev->dev, NULL); |
74 | if (IS_ERR(usb_host_clock)) { | |
1f550c1a | 75 | dev_dbg(&pdev->dev, "clk_get failed\n"); |
e3a6d019 HS |
76 | retval = PTR_ERR(usb_host_clock); |
77 | goto err3; | |
78 | } | |
79 | ||
a5b7474a LB |
80 | ep93xx_start_hc(&pdev->dev); |
81 | ||
82 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
83 | ||
b5dd18d8 | 84 | retval = usb_add_hcd(hcd, pdev->resource[1].start, 0); |
a5b7474a LB |
85 | if (retval == 0) |
86 | return retval; | |
87 | ||
88 | ep93xx_stop_hc(&pdev->dev); | |
e3a6d019 | 89 | err3: |
a5b7474a LB |
90 | iounmap(hcd->regs); |
91 | err2: | |
92 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
93 | err1: | |
94 | usb_put_hcd(hcd); | |
95 | ||
96 | return retval; | |
97 | } | |
98 | ||
99 | static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd, | |
100 | struct platform_device *pdev) | |
101 | { | |
102 | usb_remove_hcd(hcd); | |
103 | ep93xx_stop_hc(&pdev->dev); | |
104 | clk_put(usb_host_clock); | |
105 | iounmap(hcd->regs); | |
106 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
107 | usb_put_hcd(hcd); | |
108 | } | |
109 | ||
41ac7b3a | 110 | static int ohci_ep93xx_start(struct usb_hcd *hcd) |
a5b7474a LB |
111 | { |
112 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
113 | int ret; | |
114 | ||
115 | if ((ret = ohci_init(ohci)) < 0) | |
116 | return ret; | |
117 | ||
118 | if ((ret = ohci_run(ohci)) < 0) { | |
8d6c85e4 GKH |
119 | dev_err(hcd->self.controller, "can't start %s\n", |
120 | hcd->self.bus_name); | |
a5b7474a LB |
121 | ohci_stop(hcd); |
122 | return ret; | |
123 | } | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static struct hc_driver ohci_ep93xx_hc_driver = { | |
129 | .description = hcd_name, | |
130 | .product_desc = "EP93xx OHCI", | |
131 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
132 | .irq = ohci_irq, | |
133 | .flags = HCD_USB11 | HCD_MEMORY, | |
134 | .start = ohci_ep93xx_start, | |
135 | .stop = ohci_stop, | |
64a21d02 | 136 | .shutdown = ohci_shutdown, |
a5b7474a LB |
137 | .urb_enqueue = ohci_urb_enqueue, |
138 | .urb_dequeue = ohci_urb_dequeue, | |
139 | .endpoint_disable = ohci_endpoint_disable, | |
140 | .get_frame_number = ohci_get_frame, | |
141 | .hub_status_data = ohci_hub_status_data, | |
142 | .hub_control = ohci_hub_control, | |
143 | #ifdef CONFIG_PM | |
144 | .bus_suspend = ohci_bus_suspend, | |
145 | .bus_resume = ohci_bus_resume, | |
146 | #endif | |
147 | .start_port_reset = ohci_start_port_reset, | |
148 | }; | |
149 | ||
150 | extern int usb_disabled(void); | |
151 | ||
152 | static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev) | |
153 | { | |
154 | int ret; | |
155 | ||
156 | ret = -ENODEV; | |
157 | if (!usb_disabled()) | |
158 | ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev); | |
159 | ||
160 | return ret; | |
161 | } | |
162 | ||
163 | static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev) | |
164 | { | |
165 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
166 | ||
167 | usb_hcd_ep93xx_remove(hcd, pdev); | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | #ifdef CONFIG_PM | |
173 | static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
174 | { | |
175 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
caaf2632 | 176 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
a5b7474a LB |
177 | |
178 | if (time_before(jiffies, ohci->next_statechange)) | |
179 | msleep(5); | |
180 | ohci->next_statechange = jiffies; | |
181 | ||
182 | ep93xx_stop_hc(&pdev->dev); | |
a5b7474a LB |
183 | return 0; |
184 | } | |
185 | ||
186 | static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev) | |
187 | { | |
188 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
189 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
a5b7474a LB |
190 | |
191 | if (time_before(jiffies, ohci->next_statechange)) | |
192 | msleep(5); | |
193 | ohci->next_statechange = jiffies; | |
194 | ||
195 | ep93xx_start_hc(&pdev->dev); | |
a5b7474a | 196 | |
cfa49b4b | 197 | ohci_resume(hcd, false); |
a5b7474a LB |
198 | return 0; |
199 | } | |
200 | #endif | |
201 | ||
202 | ||
203 | static struct platform_driver ohci_hcd_ep93xx_driver = { | |
204 | .probe = ohci_hcd_ep93xx_drv_probe, | |
205 | .remove = ohci_hcd_ep93xx_drv_remove, | |
dd9048af | 206 | .shutdown = usb_hcd_platform_shutdown, |
a5b7474a LB |
207 | #ifdef CONFIG_PM |
208 | .suspend = ohci_hcd_ep93xx_drv_suspend, | |
209 | .resume = ohci_hcd_ep93xx_drv_resume, | |
210 | #endif | |
211 | .driver = { | |
212 | .name = "ep93xx-ohci", | |
f4fce61d | 213 | .owner = THIS_MODULE, |
a5b7474a LB |
214 | }, |
215 | }; | |
216 | ||
f4fce61d | 217 | MODULE_ALIAS("platform:ep93xx-ohci"); |