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Sylvain Munaut495a6782006-12-13 21:09:55 +01001/*
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>
Stephen Rothwell554cc172008-05-23 16:37:58 +100017#include <linux/of_platform.h>
Sylvain Munaut495a6782006-12-13 21:09:55 +010018
Sylvain Munaut495a6782006-12-13 21:09:55 +010019#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,
Sylvain Munaut495a6782006-12-13 21:09:55 +010075#ifdef CONFIG_PM
76 .bus_suspend = ohci_bus_suspend,
77 .bus_resume = ohci_bus_resume,
78#endif
79 .start_port_reset = ohci_start_port_reset,
80};
81
82
83static int __devinit
Grant Likely2dc11582010-08-06 09:25:50 -060084ohci_hcd_ppc_of_probe(struct platform_device *op, const struct of_device_id *match)
Sylvain Munaut495a6782006-12-13 21:09:55 +010085{
Grant Likely61c7a082010-04-13 16:12:29 -070086 struct device_node *dn = op->dev.of_node;
Sylvain Munaut495a6782006-12-13 21:09:55 +010087 struct usb_hcd *hcd;
88 struct ohci_hcd *ohci;
89 struct resource res;
90 int irq;
91
92 int rv;
93 int is_bigendian;
Vitaly Bordug796bcae2008-11-09 19:43:30 +010094 struct device_node *np;
Sylvain Munaut495a6782006-12-13 21:09:55 +010095
96 if (usb_disabled())
97 return -ENODEV;
98
99 is_bigendian =
Stephen Rothwell55b61fe2007-05-03 17:26:52 +1000100 of_device_is_compatible(dn, "ohci-bigendian") ||
101 of_device_is_compatible(dn, "ohci-be");
Sylvain Munaut495a6782006-12-13 21:09:55 +0100102
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)) {
Joe Perchesf45ba772010-02-05 17:51:13 -0800117 printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
Sylvain Munaut495a6782006-12-13 21:09:55 +0100118 rv = -EBUSY;
119 goto err_rmr;
120 }
121
122 irq = irq_of_parse_and_map(dn, 0);
123 if (irq == NO_IRQ) {
Joe Perchesf45ba772010-02-05 17:51:13 -0800124 printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
Sylvain Munaut495a6782006-12-13 21:09:55 +0100125 rv = -EBUSY;
126 goto err_irq;
127 }
128
129 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
130 if (!hcd->regs) {
Joe Perchesf45ba772010-02-05 17:51:13 -0800131 printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
Sylvain Munaut495a6782006-12-13 21:09:55 +0100132 rv = -ENOMEM;
133 goto err_ioremap;
134 }
135
136 ohci = hcd_to_ohci(hcd);
Valentine Barshak4f454262007-10-09 15:00:05 -0700137 if (is_bigendian) {
Sylvain Munaut495a6782006-12-13 21:09:55 +0100138 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
Grant Likely66ffbe42008-01-24 22:25:31 -0700139 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
140 ohci->flags |= OHCI_QUIRK_FRAME_NO;
Valentine Barshak4f454262007-10-09 15:00:05 -0700141 if (of_device_is_compatible(dn, "mpc5200-ohci"))
142 ohci->flags |= OHCI_QUIRK_FRAME_NO;
143 }
Sylvain Munaut495a6782006-12-13 21:09:55 +0100144
145 ohci_hcd_init(ohci);
146
Alan Stern442258e2007-12-06 14:47:08 -0500147 rv = usb_add_hcd(hcd, irq, IRQF_DISABLED);
Sylvain Munaut495a6782006-12-13 21:09:55 +0100148 if (rv == 0)
149 return 0;
150
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100151 /* by now, 440epx is known to show usb_23 erratum */
152 np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx");
153
154 /* Work around - At this point ohci_run has executed, the
155 * controller is running, everything, the root ports, etc., is
156 * set up. If the ehci driver is loaded, put the ohci core in
157 * the suspended state. The ehci driver will bring it out of
158 * suspended state when / if a non-high speed USB device is
159 * attached to the USB Host port. If the ehci driver is not
160 * loaded, do nothing. request_mem_region is used to test if
161 * the ehci driver is loaded.
162 */
163 if (np != NULL) {
164 if (!of_address_to_resource(np, 0, &res)) {
165 if (!request_mem_region(res.start, 0x4, hcd_name)) {
166 writel_be((readl_be(&ohci->regs->control) |
167 OHCI_USB_SUSPEND), &ohci->regs->control);
168 (void) readl_be(&ohci->regs->control);
169 } else
170 release_mem_region(res.start, 0x4);
171 } else
Joe Perchesf45ba772010-02-05 17:51:13 -0800172 pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100173 }
174
Sylvain Munaut495a6782006-12-13 21:09:55 +0100175 iounmap(hcd->regs);
176err_ioremap:
177 irq_dispose_mapping(irq);
178err_irq:
179 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
180err_rmr:
181 usb_put_hcd(hcd);
182
183 return rv;
184}
185
Grant Likely2dc11582010-08-06 09:25:50 -0600186static int ohci_hcd_ppc_of_remove(struct platform_device *op)
Sylvain Munaut495a6782006-12-13 21:09:55 +0100187{
188 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
189 dev_set_drvdata(&op->dev, NULL);
190
191 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
192
193 usb_remove_hcd(hcd);
194
195 iounmap(hcd->regs);
196 irq_dispose_mapping(hcd->irq);
197 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
198
199 usb_put_hcd(hcd);
200
201 return 0;
202}
203
Grant Likely2dc11582010-08-06 09:25:50 -0600204static int ohci_hcd_ppc_of_shutdown(struct platform_device *op)
Sylvain Munaut495a6782006-12-13 21:09:55 +0100205{
206 struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
207
208 if (hcd->driver->shutdown)
209 hcd->driver->shutdown(hcd);
210
211 return 0;
212}
213
214
Németh Mártonc4386ad2010-01-10 15:35:03 +0100215static const struct of_device_id ohci_hcd_ppc_of_match[] = {
Sylvain Munaut495a6782006-12-13 21:09:55 +0100216#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
217 {
218 .name = "usb",
219 .compatible = "ohci-bigendian",
220 },
221 {
222 .name = "usb",
223 .compatible = "ohci-be",
224 },
225#endif
226#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
227 {
228 .name = "usb",
229 .compatible = "ohci-littledian",
230 },
231 {
232 .name = "usb",
233 .compatible = "ohci-le",
234 },
235#endif
236 {},
237};
238MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
239
240#if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
241 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
242#error "No endianess selected for ppc-of-ohci"
243#endif
244
245
246static struct of_platform_driver ohci_hcd_ppc_of_driver = {
Sylvain Munaut495a6782006-12-13 21:09:55 +0100247 .probe = ohci_hcd_ppc_of_probe,
248 .remove = ohci_hcd_ppc_of_remove,
249 .shutdown = ohci_hcd_ppc_of_shutdown,
Grant Likely40182942010-04-13 16:13:02 -0700250 .driver = {
251 .name = "ppc-of-ohci",
252 .owner = THIS_MODULE,
253 .of_match_table = ohci_hcd_ppc_of_match,
Sylvain Munaut495a6782006-12-13 21:09:55 +0100254 },
255};
256