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authorSylvain Munaut <tnt@246tNt.com>2006-12-13 15:09:55 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-07 18:44:33 -0500
commit495a678fc62e850d15f860d39faee07ba0a8910c (patch)
tree4f8f12bafc2039fadda6e88efdc1b57729ca31d8 /drivers/usb/host/ohci-ppc-of.c
parent5e16fabe5dbcff15de6cdcba406195fe6e4380df (diff)
ohci: Add support for OHCI controller on the of_platform bus
PPC embedded systems can have a ohci controller builtin. In the new model, it will end up as a driver on the of_platform bus, this patches takes care of them. Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ohci-ppc-of.c')
-rw-r--r--drivers/usb/host/ohci-ppc-of.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
new file mode 100644
index 000000000000..08e237c7bc43
--- /dev/null
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -0,0 +1,232 @@
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
22static int __devinit
23ohci_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
40static 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
84static int __devinit
85ohci_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 device_is_compatible(dn, "ohci-bigendian") ||
101 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
140 ohci_hcd_init(ohci);
141
142 rv = usb_add_hcd(hcd, irq, 0);
143 if (rv == 0)
144 return 0;
145
146 iounmap(hcd->regs);
147err_ioremap:
148 irq_dispose_mapping(irq);
149err_irq:
150 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
151err_rmr:
152 usb_put_hcd(hcd);
153
154 return rv;
155}
156
157static int ohci_hcd_ppc_of_remove(struct of_device *op)
158{
159 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
160 dev_set_drvdata(&op->dev, NULL);
161
162 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
163
164 usb_remove_hcd(hcd);
165
166 iounmap(hcd->regs);
167 irq_dispose_mapping(hcd->irq);
168 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
169
170 usb_put_hcd(hcd);
171
172 return 0;
173}
174
175static int ohci_hcd_ppc_of_shutdown(struct of_device *op)
176{
177 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
178
179 if (hcd->driver->shutdown)
180 hcd->driver->shutdown(hcd);
181
182 return 0;
183}
184
185
186static struct of_device_id ohci_hcd_ppc_of_match[] = {
187#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
188 {
189 .name = "usb",
190 .compatible = "ohci-bigendian",
191 },
192 {
193 .name = "usb",
194 .compatible = "ohci-be",
195 },
196#endif
197#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
198 {
199 .name = "usb",
200 .compatible = "ohci-littledian",
201 },
202 {
203 .name = "usb",
204 .compatible = "ohci-le",
205 },
206#endif
207 {},
208};
209MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
210
211#if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
212 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
213#error "No endianess selected for ppc-of-ohci"
214#endif
215
216
217static struct of_platform_driver ohci_hcd_ppc_of_driver = {
218 .name = "ppc-of-ohci",
219 .match_table = ohci_hcd_ppc_of_match,
220 .probe = ohci_hcd_ppc_of_probe,
221 .remove = ohci_hcd_ppc_of_remove,
222 .shutdown = ohci_hcd_ppc_of_shutdown,
223#ifdef CONFIG_PM
224 /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/
225 /*.resume = ohci_hcd_ppc_soc_drv_resume,*/
226#endif
227 .driver = {
228 .name = "ppc-of-ohci",
229 .owner = THIS_MODULE,
230 },
231};
232