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586dfc8c WZ |
1 | /* |
2 | * linux/driver/usb/host/ehci-w90x900.c | |
3 | * | |
4 | * Copyright (c) 2008 Nuvoton technology corporation. | |
5 | * | |
6 | * Wan ZongShun <mcuos.com@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation;version 2 of the License. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/platform_device.h> | |
15 | ||
16 | /*ebable phy0 and phy1 for w90p910*/ | |
17 | #define ENPHY (0x01<<8) | |
18 | #define PHY0_CTR (0xA4) | |
19 | #define PHY1_CTR (0xA8) | |
20 | ||
21 | static int __devinit usb_w90x900_probe(const struct hc_driver *driver, | |
22 | struct platform_device *pdev) | |
23 | { | |
24 | struct usb_hcd *hcd; | |
25 | struct ehci_hcd *ehci; | |
26 | struct resource *res; | |
27 | int retval = 0, irq; | |
28 | unsigned long val; | |
29 | ||
30 | ||
31 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
32 | if (!res) { | |
33 | retval = -ENXIO; | |
34 | goto err1; | |
35 | } | |
36 | ||
37 | hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI"); | |
38 | if (!hcd) { | |
39 | retval = -ENOMEM; | |
40 | goto err1; | |
41 | } | |
42 | ||
43 | hcd->rsrc_start = res->start; | |
44 | hcd->rsrc_len = res->end - res->start + 1; | |
45 | ||
46 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
47 | retval = -EBUSY; | |
48 | goto err2; | |
49 | } | |
50 | ||
51 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
52 | if (hcd->regs == NULL) { | |
53 | retval = -EFAULT; | |
54 | goto err3; | |
55 | } | |
56 | ||
57 | ehci = hcd_to_ehci(hcd); | |
58 | ehci->caps = hcd->regs; | |
59 | ehci->regs = hcd->regs + | |
60 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
61 | ||
62 | /* enable PHY 0,1,the regs only apply to w90p910 | |
63 | * 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of | |
64 | * w90p910 IC relative to ehci->regs. | |
65 | */ | |
66 | val = __raw_readl(ehci->regs+PHY0_CTR); | |
67 | val |= ENPHY; | |
68 | __raw_writel(val, ehci->regs+PHY0_CTR); | |
69 | ||
70 | val = __raw_readl(ehci->regs+PHY1_CTR); | |
71 | val |= ENPHY; | |
72 | __raw_writel(val, ehci->regs+PHY1_CTR); | |
73 | ||
74 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
75 | ehci->sbrn = 0x20; | |
76 | ||
77 | irq = platform_get_irq(pdev, 0); | |
78 | if (irq < 0) | |
79 | goto err4; | |
80 | ||
81 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); | |
82 | if (retval != 0) | |
83 | goto err4; | |
84 | ||
85 | ehci_writel(ehci, 1, &ehci->regs->configured_flag); | |
86 | ||
87 | return retval; | |
88 | err4: | |
89 | iounmap(hcd->regs); | |
90 | err3: | |
91 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
92 | err2: | |
93 | usb_put_hcd(hcd); | |
94 | err1: | |
95 | return retval; | |
96 | } | |
97 | ||
98 | static | |
99 | void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev) | |
100 | { | |
101 | usb_remove_hcd(hcd); | |
102 | iounmap(hcd->regs); | |
103 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
104 | usb_put_hcd(hcd); | |
105 | } | |
106 | ||
107 | static const struct hc_driver ehci_w90x900_hc_driver = { | |
108 | .description = hcd_name, | |
109 | .product_desc = "Nuvoton w90x900 EHCI Host Controller", | |
110 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
111 | ||
112 | /* | |
113 | * generic hardware linkage | |
114 | */ | |
115 | .irq = ehci_irq, | |
116 | .flags = HCD_USB2|HCD_MEMORY, | |
117 | ||
118 | /* | |
119 | * basic lifecycle operations | |
120 | */ | |
121 | .reset = ehci_init, | |
122 | .start = ehci_run, | |
123 | ||
124 | .stop = ehci_stop, | |
125 | .shutdown = ehci_shutdown, | |
126 | ||
127 | /* | |
128 | * managing i/o requests and associated device resources | |
129 | */ | |
130 | .urb_enqueue = ehci_urb_enqueue, | |
131 | .urb_dequeue = ehci_urb_dequeue, | |
132 | .endpoint_disable = ehci_endpoint_disable, | |
133 | ||
134 | /* | |
135 | * scheduling support | |
136 | */ | |
137 | .get_frame_number = ehci_get_frame, | |
138 | ||
139 | /* | |
140 | * root hub support | |
141 | */ | |
142 | .hub_status_data = ehci_hub_status_data, | |
143 | .hub_control = ehci_hub_control, | |
144 | #ifdef CONFIG_PM | |
145 | .bus_suspend = ehci_bus_suspend, | |
146 | .bus_resume = ehci_bus_resume, | |
147 | #endif | |
148 | .relinquish_port = ehci_relinquish_port, | |
149 | .port_handed_over = ehci_port_handed_over, | |
150 | }; | |
151 | ||
152 | static int __devinit ehci_w90x900_probe(struct platform_device *pdev) | |
153 | { | |
154 | if (usb_disabled()) | |
155 | return -ENODEV; | |
156 | ||
157 | return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev); | |
158 | } | |
159 | ||
160 | static int __devexit ehci_w90x900_remove(struct platform_device *pdev) | |
161 | { | |
162 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
163 | ||
164 | usb_w90x900_remove(hcd, pdev); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | static struct platform_driver ehci_hcd_w90x900_driver = { | |
170 | .probe = ehci_w90x900_probe, | |
171 | .remove = __devexit_p(ehci_w90x900_remove), | |
172 | .driver = { | |
173 | .name = "w90x900-ehci", | |
174 | .owner = THIS_MODULE, | |
175 | }, | |
176 | }; | |
177 | ||
178 | MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>"); | |
179 | MODULE_DESCRIPTION("w90p910 usb ehci driver!"); | |
180 | MODULE_LICENSE("GPL"); | |
181 | MODULE_ALIAS("platform:w90p910-ehci"); |