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> | |
5af50730 RH |
17 | #include <linux/of_address.h> |
18 | #include <linux/of_irq.h> | |
554cc171 | 19 | #include <linux/of_platform.h> |
495a678f | 20 | |
495a678f SM |
21 | #include <asm/prom.h> |
22 | ||
23 | ||
41ac7b3a | 24 | static int |
495a678f SM |
25 | ohci_ppc_of_start(struct usb_hcd *hcd) |
26 | { | |
27 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
28 | int ret; | |
29 | ||
30 | if ((ret = ohci_init(ohci)) < 0) | |
31 | return ret; | |
32 | ||
33 | if ((ret = ohci_run(ohci)) < 0) { | |
1d55b768 GKH |
34 | dev_err(hcd->self.controller, "can't start %s\n", |
35 | hcd->self.bus_name); | |
495a678f SM |
36 | ohci_stop(hcd); |
37 | return ret; | |
38 | } | |
39 | ||
40 | return 0; | |
41 | } | |
42 | ||
43 | static const struct hc_driver ohci_ppc_of_hc_driver = { | |
44 | .description = hcd_name, | |
45 | .product_desc = "OF OHCI", | |
46 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
47 | ||
48 | /* | |
49 | * generic hardware linkage | |
50 | */ | |
51 | .irq = ohci_irq, | |
52 | .flags = HCD_USB11 | HCD_MEMORY, | |
53 | ||
54 | /* | |
55 | * basic lifecycle operations | |
56 | */ | |
57 | .start = ohci_ppc_of_start, | |
58 | .stop = ohci_stop, | |
59 | .shutdown = ohci_shutdown, | |
60 | ||
61 | /* | |
62 | * managing i/o requests and associated device resources | |
63 | */ | |
64 | .urb_enqueue = ohci_urb_enqueue, | |
65 | .urb_dequeue = ohci_urb_dequeue, | |
66 | .endpoint_disable = ohci_endpoint_disable, | |
67 | ||
68 | /* | |
69 | * scheduling support | |
70 | */ | |
71 | .get_frame_number = ohci_get_frame, | |
72 | ||
73 | /* | |
74 | * root hub support | |
75 | */ | |
76 | .hub_status_data = ohci_hub_status_data, | |
77 | .hub_control = ohci_hub_control, | |
495a678f SM |
78 | #ifdef CONFIG_PM |
79 | .bus_suspend = ohci_bus_suspend, | |
80 | .bus_resume = ohci_bus_resume, | |
81 | #endif | |
82 | .start_port_reset = ohci_start_port_reset, | |
83 | }; | |
84 | ||
85 | ||
41ac7b3a | 86 | static int ohci_hcd_ppc_of_probe(struct platform_device *op) |
495a678f | 87 | { |
61c7a080 | 88 | struct device_node *dn = op->dev.of_node; |
495a678f SM |
89 | struct usb_hcd *hcd; |
90 | struct ohci_hcd *ohci; | |
91 | struct resource res; | |
92 | int irq; | |
93 | ||
94 | int rv; | |
95 | int is_bigendian; | |
796bcae7 | 96 | struct device_node *np; |
495a678f SM |
97 | |
98 | if (usb_disabled()) | |
99 | return -ENODEV; | |
100 | ||
101 | is_bigendian = | |
55b61fec SR |
102 | of_device_is_compatible(dn, "ohci-bigendian") || |
103 | of_device_is_compatible(dn, "ohci-be"); | |
495a678f SM |
104 | |
105 | dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); | |
106 | ||
107 | rv = of_address_to_resource(dn, 0, &res); | |
108 | if (rv) | |
109 | return rv; | |
110 | ||
111 | hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); | |
112 | if (!hcd) | |
113 | return -ENOMEM; | |
114 | ||
115 | hcd->rsrc_start = res.start; | |
28f65c11 | 116 | hcd->rsrc_len = resource_size(&res); |
495a678f | 117 | |
3e2e714e JH |
118 | hcd->regs = devm_ioremap_resource(&op->dev, &res); |
119 | if (IS_ERR(hcd->regs)) { | |
120 | rv = PTR_ERR(hcd->regs); | |
495a678f SM |
121 | goto err_rmr; |
122 | } | |
123 | ||
124 | irq = irq_of_parse_and_map(dn, 0); | |
125 | if (irq == NO_IRQ) { | |
63c9b9d3 JH |
126 | dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", |
127 | __FILE__); | |
495a678f | 128 | rv = -EBUSY; |
3e2e714e | 129 | goto err_rmr; |
495a678f SM |
130 | } |
131 | ||
132 | ohci = hcd_to_ohci(hcd); | |
4f45426c | 133 | if (is_bigendian) { |
495a678f | 134 | ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; |
66ffbe49 GL |
135 | if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) |
136 | ohci->flags |= OHCI_QUIRK_FRAME_NO; | |
4f45426c VB |
137 | if (of_device_is_compatible(dn, "mpc5200-ohci")) |
138 | ohci->flags |= OHCI_QUIRK_FRAME_NO; | |
139 | } | |
495a678f SM |
140 | |
141 | ohci_hcd_init(ohci); | |
142 | ||
b5dd18d8 | 143 | rv = usb_add_hcd(hcd, irq, 0); |
3c9740a1 PC |
144 | if (rv == 0) { |
145 | device_wakeup_enable(hcd->self.controller); | |
495a678f | 146 | return 0; |
3c9740a1 | 147 | } |
495a678f | 148 | |
796bcae7 VB |
149 | /* by now, 440epx is known to show usb_23 erratum */ |
150 | np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); | |
151 | ||
152 | /* Work around - At this point ohci_run has executed, the | |
153 | * controller is running, everything, the root ports, etc., is | |
154 | * set up. If the ehci driver is loaded, put the ohci core in | |
155 | * the suspended state. The ehci driver will bring it out of | |
156 | * suspended state when / if a non-high speed USB device is | |
157 | * attached to the USB Host port. If the ehci driver is not | |
158 | * loaded, do nothing. request_mem_region is used to test if | |
159 | * the ehci driver is loaded. | |
160 | */ | |
161 | if (np != NULL) { | |
162 | if (!of_address_to_resource(np, 0, &res)) { | |
163 | if (!request_mem_region(res.start, 0x4, hcd_name)) { | |
164 | writel_be((readl_be(&ohci->regs->control) | | |
165 | OHCI_USB_SUSPEND), &ohci->regs->control); | |
166 | (void) readl_be(&ohci->regs->control); | |
167 | } else | |
168 | release_mem_region(res.start, 0x4); | |
169 | } else | |
f45ba776 | 170 | pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__); |
796bcae7 VB |
171 | } |
172 | ||
495a678f | 173 | irq_dispose_mapping(irq); |
495a678f SM |
174 | err_rmr: |
175 | usb_put_hcd(hcd); | |
176 | ||
177 | return rv; | |
178 | } | |
179 | ||
2dc11581 | 180 | static int ohci_hcd_ppc_of_remove(struct platform_device *op) |
495a678f | 181 | { |
477527ba | 182 | struct usb_hcd *hcd = platform_get_drvdata(op); |
495a678f SM |
183 | |
184 | dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); | |
185 | ||
186 | usb_remove_hcd(hcd); | |
187 | ||
495a678f | 188 | irq_dispose_mapping(hcd->irq); |
495a678f SM |
189 | |
190 | usb_put_hcd(hcd); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
c4386ad0 | 195 | static const struct of_device_id ohci_hcd_ppc_of_match[] = { |
495a678f SM |
196 | #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE |
197 | { | |
198 | .name = "usb", | |
199 | .compatible = "ohci-bigendian", | |
200 | }, | |
201 | { | |
202 | .name = "usb", | |
203 | .compatible = "ohci-be", | |
204 | }, | |
205 | #endif | |
206 | #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE | |
207 | { | |
208 | .name = "usb", | |
209 | .compatible = "ohci-littledian", | |
210 | }, | |
211 | { | |
212 | .name = "usb", | |
213 | .compatible = "ohci-le", | |
214 | }, | |
215 | #endif | |
216 | {}, | |
217 | }; | |
218 | MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); | |
219 | ||
220 | #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ | |
221 | !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) | |
1c1301dd | 222 | #error "No endianness selected for ppc-of-ohci" |
495a678f SM |
223 | #endif |
224 | ||
225 | ||
d35fb641 | 226 | static struct platform_driver ohci_hcd_ppc_of_driver = { |
495a678f SM |
227 | .probe = ohci_hcd_ppc_of_probe, |
228 | .remove = ohci_hcd_ppc_of_remove, | |
aaf6b52d | 229 | .shutdown = usb_hcd_platform_shutdown, |
4018294b GL |
230 | .driver = { |
231 | .name = "ppc-of-ohci", | |
4018294b | 232 | .of_match_table = ohci_hcd_ppc_of_match, |
495a678f SM |
233 | }, |
234 | }; | |
235 |