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 /* enable 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 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 irq = platform_get_irq(pdev, 0);
75 if (irq < 0)
76 goto err4;
77
78 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
79 if (retval != 0)
80 goto err4;
81
82 return retval;
83 err4:
84 iounmap(hcd->regs);
85 err3:
86 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
87 err2:
88 usb_put_hcd(hcd);
89 err1:
90 return retval;
91 }
92
93 static
usb_w90x900_remove(struct usb_hcd * hcd,struct platform_device * pdev)94 void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev)
95 {
96 usb_remove_hcd(hcd);
97 iounmap(hcd->regs);
98 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
99 usb_put_hcd(hcd);
100 }
101
102 static const struct hc_driver ehci_w90x900_hc_driver = {
103 .description = hcd_name,
104 .product_desc = "Nuvoton w90x900 EHCI Host Controller",
105 .hcd_priv_size = sizeof(struct ehci_hcd),
106
107 /*
108 * generic hardware linkage
109 */
110 .irq = ehci_irq,
111 .flags = HCD_USB2|HCD_MEMORY,
112
113 /*
114 * basic lifecycle operations
115 */
116 .reset = ehci_setup,
117 .start = ehci_run,
118
119 .stop = ehci_stop,
120 .shutdown = ehci_shutdown,
121
122 /*
123 * managing i/o requests and associated device resources
124 */
125 .urb_enqueue = ehci_urb_enqueue,
126 .urb_dequeue = ehci_urb_dequeue,
127 .endpoint_disable = ehci_endpoint_disable,
128 .endpoint_reset = ehci_endpoint_reset,
129
130 /*
131 * scheduling support
132 */
133 .get_frame_number = ehci_get_frame,
134
135 /*
136 * root hub support
137 */
138 .hub_status_data = ehci_hub_status_data,
139 .hub_control = ehci_hub_control,
140 #ifdef CONFIG_PM
141 .bus_suspend = ehci_bus_suspend,
142 .bus_resume = ehci_bus_resume,
143 #endif
144 .relinquish_port = ehci_relinquish_port,
145 .port_handed_over = ehci_port_handed_over,
146
147 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
148 };
149
ehci_w90x900_probe(struct platform_device * pdev)150 static int ehci_w90x900_probe(struct platform_device *pdev)
151 {
152 if (usb_disabled())
153 return -ENODEV;
154
155 return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
156 }
157
ehci_w90x900_remove(struct platform_device * pdev)158 static int ehci_w90x900_remove(struct platform_device *pdev)
159 {
160 struct usb_hcd *hcd = platform_get_drvdata(pdev);
161
162 usb_w90x900_remove(hcd, pdev);
163
164 return 0;
165 }
166
167 static struct platform_driver ehci_hcd_w90x900_driver = {
168 .probe = ehci_w90x900_probe,
169 .remove = ehci_w90x900_remove,
170 .driver = {
171 .name = "w90x900-ehci",
172 .owner = THIS_MODULE,
173 },
174 };
175
176 MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
177 MODULE_DESCRIPTION("w90p910 usb ehci driver!");
178 MODULE_LICENSE("GPL");
179 MODULE_ALIAS("platform:w90p910-ehci");
180