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 #include <linux/of_platform.h>
18
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 #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
83 static int __devinit
84 ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match)
85 {
86 struct device_node *dn = op->node;
87 struct usb_hcd *hcd;
88 struct ohci_hcd *ohci;
89 struct resource res;
90 int irq;
91
92 int rv;
93 int is_bigendian;
94 struct device_node *np;
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 /* 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
172 pr_debug(__FILE__ ": cannot get ehci offset from fdt\n");
173 }
174
175 iounmap(hcd->regs);
176 err_ioremap:
177 irq_dispose_mapping(irq);
178 err_irq:
179 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
180 err_rmr:
181 usb_put_hcd(hcd);
182
183 return rv;
184 }
185
186 static int ohci_hcd_ppc_of_remove(struct of_device *op)
187 {
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
204 static int ohci_hcd_ppc_of_shutdown(struct of_device *op)
205 {
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
215 static struct of_device_id ohci_hcd_ppc_of_match[] = {
216 #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 };
238 MODULE_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
246 static struct of_platform_driver ohci_hcd_ppc_of_driver = {
247 .name = "ppc-of-ohci",
248 .match_table = ohci_hcd_ppc_of_match,
249 .probe = ohci_hcd_ppc_of_probe,
250 .remove = ohci_hcd_ppc_of_remove,
251 .shutdown = ohci_hcd_ppc_of_shutdown,
252 #ifdef CONFIG_PM
253 /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/
254 /*.resume = ohci_hcd_ppc_soc_drv_resume,*/
255 #endif
256 .driver = {
257 .name = "ppc-of-ohci",
258 .owner = THIS_MODULE,
259 },
260 };
261
262
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