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 = resource_size(res);
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, 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 ehci_reset(ehci);
82
83 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
84 if (retval != 0)
85 goto err4;
86
87 ehci_writel(ehci, 1, &ehci->regs->configured_flag);
88
89 return retval;
90 err4:
91 iounmap(hcd->regs);
92 err3:
93 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
94 err2:
95 usb_put_hcd(hcd);
96 err1:
97 return retval;
98 }
99
100 static
usb_w90x900_remove(struct usb_hcd * hcd,struct platform_device * pdev)101 void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev)
102 {
103 usb_remove_hcd(hcd);
104 iounmap(hcd->regs);
105 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
106 usb_put_hcd(hcd);
107 }
108
109 static const struct hc_driver ehci_w90x900_hc_driver = {
110 .description = hcd_name,
111 .product_desc = "Nuvoton w90x900 EHCI Host Controller",
112 .hcd_priv_size = sizeof(struct ehci_hcd),
113
114 /*
115 * generic hardware linkage
116 */
117 .irq = ehci_irq,
118 .flags = HCD_USB2|HCD_MEMORY,
119
120 /*
121 * basic lifecycle operations
122 */
123 .reset = ehci_init,
124 .start = ehci_run,
125
126 .stop = ehci_stop,
127 .shutdown = ehci_shutdown,
128
129 /*
130 * managing i/o requests and associated device resources
131 */
132 .urb_enqueue = ehci_urb_enqueue,
133 .urb_dequeue = ehci_urb_dequeue,
134 .endpoint_disable = ehci_endpoint_disable,
135 .endpoint_reset = ehci_endpoint_reset,
136
137 /*
138 * scheduling support
139 */
140 .get_frame_number = ehci_get_frame,
141
142 /*
143 * root hub support
144 */
145 .hub_status_data = ehci_hub_status_data,
146 .hub_control = ehci_hub_control,
147 #ifdef CONFIG_PM
148 .bus_suspend = ehci_bus_suspend,
149 .bus_resume = ehci_bus_resume,
150 #endif
151 .relinquish_port = ehci_relinquish_port,
152 .port_handed_over = ehci_port_handed_over,
153
154 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
155 };
156
ehci_w90x900_probe(struct platform_device * pdev)157 static int __devinit ehci_w90x900_probe(struct platform_device *pdev)
158 {
159 if (usb_disabled())
160 return -ENODEV;
161
162 return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
163 }
164
ehci_w90x900_remove(struct platform_device * pdev)165 static int __devexit ehci_w90x900_remove(struct platform_device *pdev)
166 {
167 struct usb_hcd *hcd = platform_get_drvdata(pdev);
168
169 usb_w90x900_remove(hcd, pdev);
170
171 return 0;
172 }
173
174 static struct platform_driver ehci_hcd_w90x900_driver = {
175 .probe = ehci_w90x900_probe,
176 .remove = __devexit_p(ehci_w90x900_remove),
177 .driver = {
178 .name = "w90x900-ehci",
179 .owner = THIS_MODULE,
180 },
181 };
182
183 MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
184 MODULE_DESCRIPTION("w90p910 usb ehci driver!");
185 MODULE_LICENSE("GPL");
186 MODULE_ALIAS("platform:w90p910-ehci");
187