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
usb_w90x900_probe(const struct hc_driver * driver,struct platform_device * pdev)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
usb_w90x900_remove(struct usb_hcd * hcd,struct platform_device * pdev)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 .endpoint_reset = ehci_endpoint_reset,
134
135 /*
136 * scheduling support
137 */
138 .get_frame_number = ehci_get_frame,
139
140 /*
141 * root hub support
142 */
143 .hub_status_data = ehci_hub_status_data,
144 .hub_control = ehci_hub_control,
145 #ifdef CONFIG_PM
146 .bus_suspend = ehci_bus_suspend,
147 .bus_resume = ehci_bus_resume,
148 #endif
149 .relinquish_port = ehci_relinquish_port,
150 .port_handed_over = ehci_port_handed_over,
151
152 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
153 };
154
ehci_w90x900_probe(struct platform_device * pdev)155 static int __devinit ehci_w90x900_probe(struct platform_device *pdev)
156 {
157 if (usb_disabled())
158 return -ENODEV;
159
160 return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
161 }
162
ehci_w90x900_remove(struct platform_device * pdev)163 static int __devexit ehci_w90x900_remove(struct platform_device *pdev)
164 {
165 struct usb_hcd *hcd = platform_get_drvdata(pdev);
166
167 usb_w90x900_remove(hcd, pdev);
168
169 return 0;
170 }
171
172 static struct platform_driver ehci_hcd_w90x900_driver = {
173 .probe = ehci_w90x900_probe,
174 .remove = __devexit_p(ehci_w90x900_remove),
175 .driver = {
176 .name = "w90x900-ehci",
177 .owner = THIS_MODULE,
178 },
179 };
180
181 MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
182 MODULE_DESCRIPTION("w90p910 usb ehci driver!");
183 MODULE_LICENSE("GPL");
184 MODULE_ALIAS("platform:w90p910-ehci");
185