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12#include <linux/platform_device.h>
13#include <linux/clk.h>
14#include <linux/platform_data/ehci-sh.h>
15
16struct ehci_sh_priv {
17 struct clk *iclk, *fclk;
18 struct usb_hcd *hcd;
19};
20
21static int ehci_sh_reset(struct usb_hcd *hcd)
22{
23 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
24
25 ehci->caps = hcd->regs;
26
27 return ehci_setup(hcd);
28}
29
30static const struct hc_driver ehci_sh_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "SuperH EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
34
35
36
37
38 .irq = ehci_irq,
39 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
40
41
42
43
44 .reset = ehci_sh_reset,
45 .start = ehci_run,
46 .stop = ehci_stop,
47 .shutdown = ehci_shutdown,
48
49
50
51
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
56
57
58
59
60 .get_frame_number = ehci_get_frame,
61
62
63
64
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
67
68#ifdef CONFIG_PM
69 .bus_suspend = ehci_bus_suspend,
70 .bus_resume = ehci_bus_resume,
71#endif
72
73 .relinquish_port = ehci_relinquish_port,
74 .port_handed_over = ehci_port_handed_over,
75 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
76};
77
78static int ehci_hcd_sh_probe(struct platform_device *pdev)
79{
80 struct resource *res;
81 struct ehci_sh_priv *priv;
82 struct ehci_sh_platdata *pdata;
83 struct usb_hcd *hcd;
84 int irq, ret;
85
86 if (usb_disabled())
87 return -ENODEV;
88
89 irq = platform_get_irq(pdev, 0);
90 if (irq <= 0) {
91 dev_err(&pdev->dev,
92 "Found HC with no IRQ. Check %s setup!\n",
93 dev_name(&pdev->dev));
94 ret = -ENODEV;
95 goto fail_create_hcd;
96 }
97
98 pdata = dev_get_platdata(&pdev->dev);
99
100
101 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
102 dev_name(&pdev->dev));
103 if (!hcd) {
104 ret = -ENOMEM;
105 goto fail_create_hcd;
106 }
107
108 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
109 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
110 if (IS_ERR(hcd->regs)) {
111 ret = PTR_ERR(hcd->regs);
112 goto fail_request_resource;
113 }
114 hcd->rsrc_start = res->start;
115 hcd->rsrc_len = resource_size(res);
116
117 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
118 GFP_KERNEL);
119 if (!priv) {
120 ret = -ENOMEM;
121 goto fail_request_resource;
122 }
123
124
125 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
126 if (IS_ERR(priv->fclk))
127 priv->fclk = NULL;
128
129 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
130 if (IS_ERR(priv->iclk))
131 priv->iclk = NULL;
132
133 clk_enable(priv->fclk);
134 clk_enable(priv->iclk);
135
136 if (pdata && pdata->phy_init)
137 pdata->phy_init();
138
139 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
140 if (ret != 0) {
141 dev_err(&pdev->dev, "Failed to add hcd");
142 goto fail_add_hcd;
143 }
144 device_wakeup_enable(hcd->self.controller);
145
146 priv->hcd = hcd;
147 platform_set_drvdata(pdev, priv);
148
149 return ret;
150
151fail_add_hcd:
152 clk_disable(priv->iclk);
153 clk_disable(priv->fclk);
154
155fail_request_resource:
156 usb_put_hcd(hcd);
157fail_create_hcd:
158 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
159
160 return ret;
161}
162
163static int ehci_hcd_sh_remove(struct platform_device *pdev)
164{
165 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
166 struct usb_hcd *hcd = priv->hcd;
167
168 usb_remove_hcd(hcd);
169 usb_put_hcd(hcd);
170
171 clk_disable(priv->fclk);
172 clk_disable(priv->iclk);
173
174 return 0;
175}
176
177static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
178{
179 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
180 struct usb_hcd *hcd = priv->hcd;
181
182 if (hcd->driver->shutdown)
183 hcd->driver->shutdown(hcd);
184}
185
186static struct platform_driver ehci_hcd_sh_driver = {
187 .probe = ehci_hcd_sh_probe,
188 .remove = ehci_hcd_sh_remove,
189 .shutdown = ehci_hcd_sh_shutdown,
190 .driver = {
191 .name = "sh_ehci",
192 },
193};
194
195MODULE_ALIAS("platform:sh_ehci");
196
