OpenWrt – Blame information for rev 1

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1 office 1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 * (C) Copyright 2002 Hewlett-Packard Company
7 *
8 * Bus Glue for Moschip MCS814x.
9 *
10 * Written by Christopher Hoover <ch@hpl.hp.com>
11 * Based on fragments of previous driver by Russell King et al.
12 *
13 * Modified for LH7A404 from ohci-sa1111.c
14 * by Durgesh Pattamatta <pattamattad@sharpsec.com>
15 *
16 * Modified for pxa27x from ohci-lh7a404.c
17 * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
18 *
19 * Modified for mcs814x from ohci-mcs814x.c
20 * by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
21 * Based on an earlier driver by Ray Lehtiniemi
22 *
23 * This file is licenced under the GPL.
24 */
25  
26 #include <linux/device.h>
27 #include <linux/signal.h>
28 #include <linux/platform_device.h>
29 #include <linux/of.h>
30  
31 static int usb_hcd_mcs814x_probe(const struct hc_driver *driver,
32 struct platform_device *pdev)
33 {
34 int retval;
35 struct usb_hcd *hcd;
36  
37 if (pdev->resource[1].flags != IORESOURCE_IRQ) {
38 pr_debug("resource[1] is not IORESOURCE_IRQ");
39 return -ENOMEM;
40 }
41  
42 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
43 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
44  
45 hcd = usb_create_hcd(driver, &pdev->dev, "mcs814x");
46 if (hcd == NULL)
47 return -ENOMEM;
48  
49 hcd->rsrc_start = pdev->resource[0].start;
50 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
51 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
52 usb_put_hcd(hcd);
53 retval = -EBUSY;
54 goto err1;
55 }
56  
57 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
58 if (hcd->regs == NULL) {
59 pr_debug("ioremap failed");
60 retval = -ENOMEM;
61 goto err2;
62 }
63  
64 ohci_hcd_init(hcd_to_ohci(hcd));
65  
66 retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
67 if (retval == 0)
68 return retval;
69  
70 iounmap(hcd->regs);
71 err2:
72 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
73 err1:
74 usb_put_hcd(hcd);
75  
76 return retval;
77 }
78  
79 static void usb_hcd_mcs814x_remove(struct usb_hcd *hcd,
80 struct platform_device *pdev)
81 {
82 usb_remove_hcd(hcd);
83 iounmap(hcd->regs);
84 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
85 usb_put_hcd(hcd);
86 }
87  
88 static int ohci_mcs814x_start(struct usb_hcd *hcd)
89 {
90 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
91 int ret;
92  
93 ret = ohci_init(ohci);
94 if (ret < 0)
95 return ret;
96  
97 ret = ohci_run(ohci);
98 if (ret < 0) {
99 ohci_err(ohci, "can't start %s", hcd->self.bus_name);
100 ohci_stop(hcd);
101 return ret;
102 }
103  
104 return 0;
105 }
106  
107 static struct hc_driver ohci_mcs814x_hc_driver = {
108 .description = hcd_name,
109 .product_desc = "MCS814X OHCI",
110 .hcd_priv_size = sizeof(struct ohci_hcd),
111 .irq = ohci_irq,
112 .flags = HCD_USB11 | HCD_MEMORY,
113 .start = ohci_mcs814x_start,
114 .stop = ohci_stop,
115 .shutdown = ohci_shutdown,
116 .urb_enqueue = ohci_urb_enqueue,
117 .urb_dequeue = ohci_urb_dequeue,
118 .endpoint_disable = ohci_endpoint_disable,
119 .get_frame_number = ohci_get_frame,
120 .hub_status_data = ohci_hub_status_data,
121 .hub_control = ohci_hub_control,
122 #ifdef CONFIG_PM
123 .bus_suspend = ohci_bus_suspend,
124 .bus_resume = ohci_bus_resume,
125 #endif
126 .start_port_reset = ohci_start_port_reset,
127 };
128  
129 extern int usb_disabled(void);
130  
131 static int ohci_hcd_mcs814x_drv_probe(struct platform_device *pdev)
132 {
133 int ret;
134  
135 ret = -ENODEV;
136 if (!usb_disabled())
137 ret = usb_hcd_mcs814x_probe(&ohci_mcs814x_hc_driver, pdev);
138  
139 return ret;
140 }
141  
142 static int ohci_hcd_mcs814x_drv_remove(struct platform_device *pdev)
143 {
144 struct usb_hcd *hcd = platform_get_drvdata(pdev);
145  
146 usb_hcd_mcs814x_remove(hcd, pdev);
147  
148 return 0;
149 }
150  
151 #ifdef CONFIG_PM
152 static int ohci_hcd_mcs814x_drv_suspend(struct platform_device *pdev, pm_message_t state)
153 {
154 struct usb_hcd *hcd = platform_get_drvdata(pdev);
155 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
156  
157 if (time_before(jiffies, ohci->next_statechange))
158 msleep(5);
159 ohci->next_statechange = jiffies;
160  
161 hcd->state = HC_STATE_SUSPENDED;
162  
163 return 0;
164 }
165  
166 static int ohci_hcd_mcs814x_drv_resume(struct platform_device *pdev)
167 {
168 struct usb_hcd *hcd = platform_get_drvdata(pdev);
169 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
170 int status;
171  
172 if (time_before(jiffies, ohci->next_statechange))
173 msleep(5);
174 ohci->next_statechange = jiffies;
175  
176 ohci_finish_controller_resume(hcd);
177 return 0;
178 }
179 #endif
180  
181 static const struct of_device_id mcs814x_ohci_id[] = {
182 { .compatible = "moschip,mcs814x-ohci" },
183 { .compatible = "ohci-le" },
184 { /* sentinel */ },
185 };
186  
187 static struct platform_driver ohci_hcd_mcs814x_driver = {
188 .probe = ohci_hcd_mcs814x_drv_probe,
189 .remove = ohci_hcd_mcs814x_drv_remove,
190 .shutdown = usb_hcd_platform_shutdown,
191 #ifdef CONFIG_PM
192 .suspend = ohci_hcd_mcs814x_drv_suspend,
193 .resume = ohci_hcd_mcs814x_drv_resume,
194 #endif
195 .driver = {
196 .name = "mcs814x-ohci",
197 .owner = THIS_MODULE,
198 .of_match_table = mcs814x_ohci_id,
199 },
200 };
201  
202 MODULE_ALIAS("platform:mcs814x-ohci");