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Commit | Line | Data |
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495a678f SM |
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> | |
554cc171 | 17 | #include <linux/of_platform.h> |
495a678f | 18 | |
495a678f SM |
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, | |
495a678f SM |
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 | ||
d35fb641 | 83 | static int __devinit ohci_hcd_ppc_of_probe(struct platform_device *op) |
495a678f | 84 | { |
61c7a080 | 85 | struct device_node *dn = op->dev.of_node; |
495a678f SM |
86 | struct usb_hcd *hcd; |
87 | struct ohci_hcd *ohci; | |
88 | struct resource res; | |
89 | int irq; | |
90 | ||
91 | int rv; | |
92 | int is_bigendian; | |
796bcae7 | 93 | struct device_node *np; |
495a678f SM |
94 | |
95 | if (usb_disabled()) | |
96 | return -ENODEV; | |
97 | ||
98 | is_bigendian = | |
55b61fec SR |
99 | of_device_is_compatible(dn, "ohci-bigendian") || |
100 | of_device_is_compatible(dn, "ohci-be"); | |
495a678f SM |
101 | |
102 | dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); | |
103 | ||
104 | rv = of_address_to_resource(dn, 0, &res); | |
105 | if (rv) | |
106 | return rv; | |
107 | ||
108 | hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); | |
109 | if (!hcd) | |
110 | return -ENOMEM; | |
111 | ||
112 | hcd->rsrc_start = res.start; | |
28f65c11 | 113 | hcd->rsrc_len = resource_size(&res); |
495a678f SM |
114 | |
115 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
f45ba776 | 116 | printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__); |
495a678f SM |
117 | rv = -EBUSY; |
118 | goto err_rmr; | |
119 | } | |
120 | ||
121 | irq = irq_of_parse_and_map(dn, 0); | |
122 | if (irq == NO_IRQ) { | |
f45ba776 | 123 | printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__); |
495a678f SM |
124 | rv = -EBUSY; |
125 | goto err_irq; | |
126 | } | |
127 | ||
128 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
129 | if (!hcd->regs) { | |
f45ba776 | 130 | printk(KERN_ERR "%s: ioremap failed\n", __FILE__); |
495a678f SM |
131 | rv = -ENOMEM; |
132 | goto err_ioremap; | |
133 | } | |
134 | ||
135 | ohci = hcd_to_ohci(hcd); | |
4f45426c | 136 | if (is_bigendian) { |
495a678f | 137 | ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; |
66ffbe49 GL |
138 | if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) |
139 | ohci->flags |= OHCI_QUIRK_FRAME_NO; | |
4f45426c VB |
140 | if (of_device_is_compatible(dn, "mpc5200-ohci")) |
141 | ohci->flags |= OHCI_QUIRK_FRAME_NO; | |
142 | } | |
495a678f SM |
143 | |
144 | ohci_hcd_init(ohci); | |
145 | ||
b5dd18d8 | 146 | rv = usb_add_hcd(hcd, irq, 0); |
495a678f SM |
147 | if (rv == 0) |
148 | return 0; | |
149 | ||
796bcae7 VB |
150 | /* by now, 440epx is known to show usb_23 erratum */ |
151 | np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); | |
152 | ||
153 | /* Work around - At this point ohci_run has executed, the | |
154 | * controller is running, everything, the root ports, etc., is | |
155 | * set up. If the ehci driver is loaded, put the ohci core in | |
156 | * the suspended state. The ehci driver will bring it out of | |
157 | * suspended state when / if a non-high speed USB device is | |
158 | * attached to the USB Host port. If the ehci driver is not | |
159 | * loaded, do nothing. request_mem_region is used to test if | |
160 | * the ehci driver is loaded. | |
161 | */ | |
162 | if (np != NULL) { | |
163 | if (!of_address_to_resource(np, 0, &res)) { | |
164 | if (!request_mem_region(res.start, 0x4, hcd_name)) { | |
165 | writel_be((readl_be(&ohci->regs->control) | | |
166 | OHCI_USB_SUSPEND), &ohci->regs->control); | |
167 | (void) readl_be(&ohci->regs->control); | |
168 | } else | |
169 | release_mem_region(res.start, 0x4); | |
170 | } else | |
f45ba776 | 171 | pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__); |
796bcae7 VB |
172 | } |
173 | ||
495a678f SM |
174 | iounmap(hcd->regs); |
175 | err_ioremap: | |
176 | irq_dispose_mapping(irq); | |
177 | err_irq: | |
178 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
179 | err_rmr: | |
180 | usb_put_hcd(hcd); | |
181 | ||
182 | return rv; | |
183 | } | |
184 | ||
2dc11581 | 185 | static int ohci_hcd_ppc_of_remove(struct platform_device *op) |
495a678f SM |
186 | { |
187 | struct usb_hcd *hcd = dev_get_drvdata(&op->dev); | |
188 | dev_set_drvdata(&op->dev, NULL); | |
189 | ||
190 | dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); | |
191 | ||
192 | usb_remove_hcd(hcd); | |
193 | ||
194 | iounmap(hcd->regs); | |
195 | irq_dispose_mapping(hcd->irq); | |
196 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
197 | ||
198 | usb_put_hcd(hcd); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
d35fb641 | 203 | static void ohci_hcd_ppc_of_shutdown(struct platform_device *op) |
495a678f SM |
204 | { |
205 | struct usb_hcd *hcd = dev_get_drvdata(&op->dev); | |
206 | ||
207 | if (hcd->driver->shutdown) | |
208 | hcd->driver->shutdown(hcd); | |
495a678f SM |
209 | } |
210 | ||
211 | ||
c4386ad0 | 212 | static const struct of_device_id ohci_hcd_ppc_of_match[] = { |
495a678f SM |
213 | #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE |
214 | { | |
215 | .name = "usb", | |
216 | .compatible = "ohci-bigendian", | |
217 | }, | |
218 | { | |
219 | .name = "usb", | |
220 | .compatible = "ohci-be", | |
221 | }, | |
222 | #endif | |
223 | #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE | |
224 | { | |
225 | .name = "usb", | |
226 | .compatible = "ohci-littledian", | |
227 | }, | |
228 | { | |
229 | .name = "usb", | |
230 | .compatible = "ohci-le", | |
231 | }, | |
232 | #endif | |
233 | {}, | |
234 | }; | |
235 | MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); | |
236 | ||
237 | #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ | |
238 | !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) | |
239 | #error "No endianess selected for ppc-of-ohci" | |
240 | #endif | |
241 | ||
242 | ||
d35fb641 | 243 | static struct platform_driver ohci_hcd_ppc_of_driver = { |
495a678f SM |
244 | .probe = ohci_hcd_ppc_of_probe, |
245 | .remove = ohci_hcd_ppc_of_remove, | |
246 | .shutdown = ohci_hcd_ppc_of_shutdown, | |
4018294b GL |
247 | .driver = { |
248 | .name = "ppc-of-ohci", | |
249 | .owner = THIS_MODULE, | |
250 | .of_match_table = ohci_hcd_ppc_of_match, | |
495a678f SM |
251 | }, |
252 | }; | |
253 |