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 * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com>
8 *
9 * Bus glue for OHCI HC on the of_platform bus
10 *
11 * Modified for of_platform bus from ohci-sa1111.c
12 *
13 * This file is licenced under the GPL.
14 */
15
16 #include <linux/signal.h>
17
18 #include <asm/of_platform.h>
19 #include <asm/prom.h>
20
21
22 static int __devinit
23 ohci_ppc_of_start(struct usb_hcd *hcd)
24 {
25 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
26 int ret;
27
28 if ((ret = ohci_init(ohci)) < 0)
29 return ret;
30
31 if ((ret = ohci_run(ohci)) < 0) {
32 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
33 ohci_stop(hcd);
34 return ret;
35 }
36
37 return 0;
38 }
39
40 static const struct hc_driver ohci_ppc_of_hc_driver = {
41 .description = hcd_name,
42 .product_desc = "OF OHCI",
43 .hcd_priv_size = sizeof(struct ohci_hcd),
44
45 /*
46 * generic hardware linkage
47 */
48 .irq = ohci_irq,
49 .flags = HCD_USB11 | HCD_MEMORY,
50
51 /*
52 * basic lifecycle operations
53 */
54 .start = ohci_ppc_of_start,
55 .stop = ohci_stop,
56 .shutdown = ohci_shutdown,
57
58 /*
59 * managing i/o requests and associated device resources
60 */
61 .urb_enqueue = ohci_urb_enqueue,
62 .urb_dequeue = ohci_urb_dequeue,
63 .endpoint_disable = ohci_endpoint_disable,
64
65 /*
66 * scheduling support
67 */
68 .get_frame_number = ohci_get_frame,
69
70 /*
71 * root hub support
72 */
73 .hub_status_data = ohci_hub_status_data,
74 .hub_control = ohci_hub_control,
75 .hub_irq_enable = ohci_rhsc_enable,
76 #ifdef CONFIG_PM
77 .bus_suspend = ohci_bus_suspend,
78 .bus_resume = ohci_bus_resume,
79 #endif
80 .start_port_reset = ohci_start_port_reset,
81 };
82
83
84 static int __devinit
85 ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match)
86 {
87 struct device_node *dn = op->node;
88 struct usb_hcd *hcd;
89 struct ohci_hcd *ohci;
90 struct resource res;
91 int irq;
92
93 int rv;
94 int is_bigendian;
95
96 if (usb_disabled())
97 return -ENODEV;
98
99 is_bigendian =
100 of_device_is_compatible(dn, "ohci-bigendian") ||
101 of_device_is_compatible(dn, "ohci-be");
102
103 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
104
105 rv = of_address_to_resource(dn, 0, &res);
106 if (rv)
107 return rv;
108
109 hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
110 if (!hcd)
111 return -ENOMEM;
112
113 hcd->rsrc_start = res.start;
114 hcd->rsrc_len = res.end - res.start + 1;
115
116 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
117 printk(KERN_ERR __FILE__ ": request_mem_region failed\n");
118 rv = -EBUSY;
119 goto err_rmr;
120 }
121
122 irq = irq_of_parse_and_map(dn, 0);
123 if (irq == NO_IRQ) {
124 printk(KERN_ERR __FILE__ ": irq_of_parse_and_map failed\n");
125 rv = -EBUSY;
126 goto err_irq;
127 }
128
129 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
130 if (!hcd->regs) {
131 printk(KERN_ERR __FILE__ ": ioremap failed\n");
132 rv = -ENOMEM;
133 goto err_ioremap;
134 }
135
136 ohci = hcd_to_ohci(hcd);
137 if (is_bigendian) {
138 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
139 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
140 ohci->flags |= OHCI_QUIRK_FRAME_NO;
141 if (of_device_is_compatible(dn, "mpc5200-ohci"))
142 ohci->flags |= OHCI_QUIRK_FRAME_NO;
143 }
144
145 ohci_hcd_init(ohci);
146
147 rv = usb_add_hcd(hcd, irq, IRQF_DISABLED);
148 if (rv == 0)
149 return 0;
150
151 iounmap(hcd->regs);
152 err_ioremap:
153 irq_dispose_mapping(irq);
154 err_irq:
155 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
156 err_rmr:
157 usb_put_hcd(hcd);
158
159 return rv;
160 }
161
162 static int ohci_hcd_ppc_of_remove(struct of_device *op)
163 {
164 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
165 dev_set_drvdata(&op->dev, NULL);
166
167 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
168
169 usb_remove_hcd(hcd);
170
171 iounmap(hcd->regs);
172 irq_dispose_mapping(hcd->irq);
173 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
174
175 usb_put_hcd(hcd);
176
177 return 0;
178 }
179
180 static int ohci_hcd_ppc_of_shutdown(struct of_device *op)
181 {
182 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
183
184 if (hcd->driver->shutdown)
185 hcd->driver->shutdown(hcd);
186
187 return 0;
188 }
189
190
191 static struct of_device_id ohci_hcd_ppc_of_match[] = {
192 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
193 {
194 .name = "usb",
195 .compatible = "ohci-bigendian",
196 },
197 {
198 .name = "usb",
199 .compatible = "ohci-be",
200 },
201 #endif
202 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
203 {
204 .name = "usb",
205 .compatible = "ohci-littledian",
206 },
207 {
208 .name = "usb",
209 .compatible = "ohci-le",
210 },
211 #endif
212 {},
213 };
214 MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
215
216 #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
217 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
218 #error "No endianess selected for ppc-of-ohci"
219 #endif
220
221
222 static struct of_platform_driver ohci_hcd_ppc_of_driver = {
223 .name = "ppc-of-ohci",
224 .match_table = ohci_hcd_ppc_of_match,
225 .probe = ohci_hcd_ppc_of_probe,
226 .remove = ohci_hcd_ppc_of_remove,
227 .shutdown = ohci_hcd_ppc_of_shutdown,
228 #ifdef CONFIG_PM
229 /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/
230 /*.resume = ohci_hcd_ppc_soc_drv_resume,*/
231 #endif
232 .driver = {
233 .name = "ppc-of-ohci",
234 .owner = THIS_MODULE,
235 },
236 };
237
238
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