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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/dma-mapping.h>
15#include <linux/io.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/platform_device.h>
20#include <linux/usb.h>
21#include <linux/usb/hcd.h>
22
23#include "ehci.h"
24
25/* enable phy0 and phy1 for w90p910 */
26#define ENPHY (0x01<<8)
27#define PHY0_CTR (0xA4)
28#define PHY1_CTR (0xA8)
29
30#define DRIVER_DESC "EHCI w90x900 driver"
31
32static const char hcd_name[] = "ehci-w90x900 ";
33
34static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
35
36static int usb_w90x900_probe(const struct hc_driver *driver,
37 struct platform_device *pdev)
38{
39 struct usb_hcd *hcd;
40 struct ehci_hcd *ehci;
41 struct resource *res;
42 int retval = 0, irq;
43 unsigned long val;
44
45 hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI");
46 if (!hcd) {
47 retval = -ENOMEM;
48 goto err1;
49 }
50
51 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
52 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
53 if (IS_ERR(hcd->regs)) {
54 retval = PTR_ERR(hcd->regs);
55 goto err2;
56 }
57 hcd->rsrc_start = res->start;
58 hcd->rsrc_len = resource_size(res);
59
60 ehci = hcd_to_ehci(hcd);
61 ehci->caps = hcd->regs;
62 ehci->regs = hcd->regs +
63 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
64
65 /* enable PHY 0,1,the regs only apply to w90p910
66 * 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
67 * w90p910 IC relative to ehci->regs.
68 */
69 val = __raw_readl(ehci->regs+PHY0_CTR);
70 val |= ENPHY;
71 __raw_writel(val, ehci->regs+PHY0_CTR);
72
73 val = __raw_readl(ehci->regs+PHY1_CTR);
74 val |= ENPHY;
75 __raw_writel(val, ehci->regs+PHY1_CTR);
76
77 irq = platform_get_irq(pdev, 0);
78 if (irq < 0) {
79 retval = irq;
80 goto err2;
81 }
82
83 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
84 if (retval != 0)
85 goto err2;
86
87 device_wakeup_enable(hcd->self.controller);
88 return retval;
89err2:
90 usb_put_hcd(hcd);
91err1:
92 return retval;
93}
94
95static void usb_w90x900_remove(struct usb_hcd *hcd,
96 struct platform_device *pdev)
97{
98 usb_remove_hcd(hcd);
99 usb_put_hcd(hcd);
100}
101
102static int ehci_w90x900_probe(struct platform_device *pdev)
103{
104 if (usb_disabled())
105 return -ENODEV;
106
107 return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
108}
109
110static int ehci_w90x900_remove(struct platform_device *pdev)
111{
112 struct usb_hcd *hcd = platform_get_drvdata(pdev);
113
114 usb_w90x900_remove(hcd, pdev);
115
116 return 0;
117}
118
119static struct platform_driver ehci_hcd_w90x900_driver = {
120 .probe = ehci_w90x900_probe,
121 .remove = ehci_w90x900_remove,
122 .driver = {
123 .name = "w90x900-ehci",
124 },
125};
126
127static int __init ehci_w90X900_init(void)
128{
129 if (usb_disabled())
130 return -ENODEV;
131
132 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
133
134 ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
135 return platform_driver_register(&ehci_hcd_w90x900_driver);
136}
137module_init(ehci_w90X900_init);
138
139static void __exit ehci_w90X900_cleanup(void)
140{
141 platform_driver_unregister(&ehci_hcd_w90x900_driver);
142}
143module_exit(ehci_w90X900_cleanup);
144
145MODULE_DESCRIPTION(DRIVER_DESC);
146MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
147MODULE_ALIAS("platform:w90p910-ehci");
148MODULE_LICENSE("GPL v2");
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
21static 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 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;
88err4:
89 iounmap(hcd->regs);
90err3:
91 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
92err2:
93 usb_put_hcd(hcd);
94err1:
95 return retval;
96}
97
98static
99void 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
107static 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
155static 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
163static 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
172static 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
181MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
182MODULE_DESCRIPTION("w90p910 usb ehci driver!");
183MODULE_LICENSE("GPL");
184MODULE_ALIAS("platform:w90p910-ehci");