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9#include <linux/platform_device.h>
10#include <linux/clk.h>
11#include <linux/platform_data/ehci-sh.h>
12
13struct ehci_sh_priv {
14 struct clk *iclk, *fclk;
15 struct usb_hcd *hcd;
16};
17
18static int ehci_sh_reset(struct usb_hcd *hcd)
19{
20 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
21
22 ehci->caps = hcd->regs;
23
24 return ehci_setup(hcd);
25}
26
27static const struct hc_driver ehci_sh_hc_driver = {
28 .description = hcd_name,
29 .product_desc = "SuperH EHCI",
30 .hcd_priv_size = sizeof(struct ehci_hcd),
31
32
33
34
35 .irq = ehci_irq,
36 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
37
38
39
40
41 .reset = ehci_sh_reset,
42 .start = ehci_run,
43 .stop = ehci_stop,
44 .shutdown = ehci_shutdown,
45
46
47
48
49 .urb_enqueue = ehci_urb_enqueue,
50 .urb_dequeue = ehci_urb_dequeue,
51 .endpoint_disable = ehci_endpoint_disable,
52 .endpoint_reset = ehci_endpoint_reset,
53
54
55
56
57 .get_frame_number = ehci_get_frame,
58
59
60
61
62 .hub_status_data = ehci_hub_status_data,
63 .hub_control = ehci_hub_control,
64
65#ifdef CONFIG_PM
66 .bus_suspend = ehci_bus_suspend,
67 .bus_resume = ehci_bus_resume,
68#endif
69
70 .relinquish_port = ehci_relinquish_port,
71 .port_handed_over = ehci_port_handed_over,
72 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
73};
74
75static int ehci_hcd_sh_probe(struct platform_device *pdev)
76{
77 struct resource *res;
78 struct ehci_sh_priv *priv;
79 struct ehci_sh_platdata *pdata;
80 struct usb_hcd *hcd;
81 int irq, ret;
82
83 if (usb_disabled())
84 return -ENODEV;
85
86 irq = platform_get_irq(pdev, 0);
87 if (irq <= 0) {
88 dev_err(&pdev->dev,
89 "Found HC with no IRQ. Check %s setup!\n",
90 dev_name(&pdev->dev));
91 ret = -ENODEV;
92 goto fail_create_hcd;
93 }
94
95 pdata = dev_get_platdata(&pdev->dev);
96
97
98 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
99 dev_name(&pdev->dev));
100 if (!hcd) {
101 ret = -ENOMEM;
102 goto fail_create_hcd;
103 }
104
105 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
106 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
107 if (IS_ERR(hcd->regs)) {
108 ret = PTR_ERR(hcd->regs);
109 goto fail_request_resource;
110 }
111 hcd->rsrc_start = res->start;
112 hcd->rsrc_len = resource_size(res);
113
114 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
115 GFP_KERNEL);
116 if (!priv) {
117 ret = -ENOMEM;
118 goto fail_request_resource;
119 }
120
121
122 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
123 if (IS_ERR(priv->fclk))
124 priv->fclk = NULL;
125
126 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
127 if (IS_ERR(priv->iclk))
128 priv->iclk = NULL;
129
130 clk_enable(priv->fclk);
131 clk_enable(priv->iclk);
132
133 if (pdata && pdata->phy_init)
134 pdata->phy_init();
135
136 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
137 if (ret != 0) {
138 dev_err(&pdev->dev, "Failed to add hcd");
139 goto fail_add_hcd;
140 }
141 device_wakeup_enable(hcd->self.controller);
142
143 priv->hcd = hcd;
144 platform_set_drvdata(pdev, priv);
145
146 return ret;
147
148fail_add_hcd:
149 clk_disable(priv->iclk);
150 clk_disable(priv->fclk);
151
152fail_request_resource:
153 usb_put_hcd(hcd);
154fail_create_hcd:
155 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
156
157 return ret;
158}
159
160static int ehci_hcd_sh_remove(struct platform_device *pdev)
161{
162 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
163 struct usb_hcd *hcd = priv->hcd;
164
165 usb_remove_hcd(hcd);
166 usb_put_hcd(hcd);
167
168 clk_disable(priv->fclk);
169 clk_disable(priv->iclk);
170
171 return 0;
172}
173
174static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
175{
176 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
177 struct usb_hcd *hcd = priv->hcd;
178
179 if (hcd->driver->shutdown)
180 hcd->driver->shutdown(hcd);
181}
182
183static struct platform_driver ehci_hcd_sh_driver = {
184 .probe = ehci_hcd_sh_probe,
185 .remove = ehci_hcd_sh_remove,
186 .shutdown = ehci_hcd_sh_shutdown,
187 .driver = {
188 .name = "sh_ehci",
189 },
190};
191
192MODULE_ALIAS("platform:sh_ehci");
193
