This source file includes following definitions.
- ohci_sm501_init
- ohci_sm501_start
- ohci_hcd_sm501_drv_probe
- ohci_hcd_sm501_drv_remove
- ohci_sm501_suspend
- ohci_sm501_resume
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 #include <linux/interrupt.h>
16 #include <linux/jiffies.h>
17 #include <linux/platform_device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/sm501.h>
20 #include <linux/sm501-regs.h>
21
22 static int ohci_sm501_init(struct usb_hcd *hcd)
23 {
24 return ohci_init(hcd_to_ohci(hcd));
25 }
26
27 static int ohci_sm501_start(struct usb_hcd *hcd)
28 {
29 struct device *dev = hcd->self.controller;
30 int ret;
31
32 ret = ohci_run(hcd_to_ohci(hcd));
33 if (ret < 0) {
34 dev_err(dev, "can't start %s", hcd->self.bus_name);
35 ohci_stop(hcd);
36 }
37
38 return ret;
39 }
40
41
42
43 static const struct hc_driver ohci_sm501_hc_driver = {
44 .description = hcd_name,
45 .product_desc = "SM501 OHCI",
46 .hcd_priv_size = sizeof(struct ohci_hcd),
47
48
49
50
51 .irq = ohci_irq,
52 .flags = HCD_USB11 | HCD_MEMORY,
53
54
55
56
57 .reset = ohci_sm501_init,
58 .start = ohci_sm501_start,
59 .stop = ohci_stop,
60 .shutdown = ohci_shutdown,
61
62
63
64
65 .urb_enqueue = ohci_urb_enqueue,
66 .urb_dequeue = ohci_urb_dequeue,
67 .endpoint_disable = ohci_endpoint_disable,
68
69
70
71
72 .get_frame_number = ohci_get_frame,
73
74
75
76
77 .hub_status_data = ohci_hub_status_data,
78 .hub_control = ohci_hub_control,
79 #ifdef CONFIG_PM
80 .bus_suspend = ohci_bus_suspend,
81 .bus_resume = ohci_bus_resume,
82 #endif
83 .start_port_reset = ohci_start_port_reset,
84 };
85
86
87
88 static int ohci_hcd_sm501_drv_probe(struct platform_device *pdev)
89 {
90 const struct hc_driver *driver = &ohci_sm501_hc_driver;
91 struct device *dev = &pdev->dev;
92 struct resource *res, *mem;
93 int retval, irq;
94 struct usb_hcd *hcd = NULL;
95
96 irq = retval = platform_get_irq(pdev, 0);
97 if (retval < 0)
98 goto err0;
99
100 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
101 if (mem == NULL) {
102 dev_err(dev, "no resource definition for memory\n");
103 retval = -ENOENT;
104 goto err0;
105 }
106
107 if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
108 dev_err(dev, "request_mem_region failed\n");
109 retval = -EBUSY;
110 goto err0;
111 }
112
113
114 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
115 if (res == NULL) {
116 dev_err(dev, "no resource definition for registers\n");
117 retval = -ENOENT;
118 goto err1;
119 }
120
121 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
122 if (!hcd) {
123 retval = -ENOMEM;
124 goto err1;
125 }
126
127 hcd->rsrc_start = res->start;
128 hcd->rsrc_len = resource_size(res);
129
130 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, pdev->name)) {
131 dev_err(dev, "request_mem_region failed\n");
132 retval = -EBUSY;
133 goto err3;
134 }
135
136 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
137 if (hcd->regs == NULL) {
138 dev_err(dev, "cannot remap registers\n");
139 retval = -ENXIO;
140 goto err4;
141 }
142
143 ohci_hcd_init(hcd_to_ohci(hcd));
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160 if (usb_hcd_setup_local_mem(hcd, mem->start,
161 mem->start - mem->parent->start,
162 resource_size(mem)) < 0)
163 goto err5;
164 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
165 if (retval)
166 goto err5;
167 device_wakeup_enable(hcd->self.controller);
168
169
170
171 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
172 sm501_modify_reg(dev->parent, SM501_IRQ_MASK, 1 << 6, 0);
173
174 return 0;
175 err5:
176 iounmap(hcd->regs);
177 err4:
178 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
179 err3:
180 usb_put_hcd(hcd);
181 err1:
182 release_mem_region(mem->start, resource_size(mem));
183 err0:
184 return retval;
185 }
186
187 static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
188 {
189 struct usb_hcd *hcd = platform_get_drvdata(pdev);
190 struct resource *mem;
191
192 usb_remove_hcd(hcd);
193 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
194 usb_put_hcd(hcd);
195 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
196 if (mem)
197 release_mem_region(mem->start, resource_size(mem));
198
199
200
201 sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
202 sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
203
204 return 0;
205 }
206
207
208
209 #ifdef CONFIG_PM
210 static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
211 {
212 struct device *dev = &pdev->dev;
213 struct usb_hcd *hcd = platform_get_drvdata(pdev);
214 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
215 bool do_wakeup = device_may_wakeup(dev);
216 int ret;
217
218 if (time_before(jiffies, ohci->next_statechange))
219 msleep(5);
220 ohci->next_statechange = jiffies;
221
222 ret = ohci_suspend(hcd, do_wakeup);
223 if (ret)
224 return ret;
225
226 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
227 return ret;
228 }
229
230 static int ohci_sm501_resume(struct platform_device *pdev)
231 {
232 struct device *dev = &pdev->dev;
233 struct usb_hcd *hcd = platform_get_drvdata(pdev);
234 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
235
236 if (time_before(jiffies, ohci->next_statechange))
237 msleep(5);
238 ohci->next_statechange = jiffies;
239
240 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
241 ohci_resume(hcd, false);
242 return 0;
243 }
244 #else
245 #define ohci_sm501_suspend NULL
246 #define ohci_sm501_resume NULL
247 #endif
248
249
250
251
252
253
254 static struct platform_driver ohci_hcd_sm501_driver = {
255 .probe = ohci_hcd_sm501_drv_probe,
256 .remove = ohci_hcd_sm501_drv_remove,
257 .shutdown = usb_hcd_platform_shutdown,
258 .suspend = ohci_sm501_suspend,
259 .resume = ohci_sm501_resume,
260 .driver = {
261 .name = "sm501-usb",
262 },
263 };
264 MODULE_ALIAS("platform:sm501-usb");