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1da177e4 LT |
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 2003-2005 MontaVista Software Inc. | |
8 | * | |
9 | * Bus Glue for PPC On-Chip OHCI driver | |
10 | * Tested on Freescale MPC5200 and IBM STB04xxx | |
11 | * | |
12 | * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c | |
13 | * | |
14 | * This file is licenced under the GPL. | |
15 | */ | |
16 | ||
d052d1be RK |
17 | #include <linux/platform_device.h> |
18 | ||
1da177e4 LT |
19 | /* configure so an HC device and id are always provided */ |
20 | /* always called with process context; sleeping is OK */ | |
21 | ||
22 | /** | |
23 | * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs | |
24 | * Context: !in_interrupt() | |
25 | * | |
4fbd55f0 | 26 | * Allocates basic resources for this USB host controller. |
1da177e4 LT |
27 | * |
28 | * Store this function in the HCD's struct pci_driver as probe(). | |
29 | */ | |
30 | static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver, | |
31 | struct platform_device *pdev) | |
32 | { | |
33 | int retval; | |
34 | struct usb_hcd *hcd; | |
35 | struct ohci_hcd *ohci; | |
36 | struct resource *res; | |
37 | int irq; | |
1da177e4 LT |
38 | |
39 | pr_debug("initializing PPC-SOC USB Controller\n"); | |
40 | ||
41 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
42 | if (!res) { | |
43 | pr_debug(__FILE__ ": no irq\n"); | |
44 | return -ENODEV; | |
45 | } | |
46 | irq = res->start; | |
47 | ||
48 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
49 | if (!res) { | |
50 | pr_debug(__FILE__ ": no reg addr\n"); | |
51 | return -ENODEV; | |
52 | } | |
53 | ||
54 | hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB"); | |
55 | if (!hcd) | |
56 | return -ENOMEM; | |
57 | hcd->rsrc_start = res->start; | |
58 | hcd->rsrc_len = res->end - res->start + 1; | |
59 | ||
60 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
61 | pr_debug(__FILE__ ": request_mem_region failed\n"); | |
62 | retval = -EBUSY; | |
63 | goto err1; | |
64 | } | |
65 | ||
66 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
67 | if (!hcd->regs) { | |
68 | pr_debug(__FILE__ ": ioremap failed\n"); | |
69 | retval = -ENOMEM; | |
70 | goto err2; | |
71 | } | |
72 | ||
1da177e4 LT |
73 | ohci = hcd_to_ohci(hcd); |
74 | ohci->flags |= OHCI_BIG_ENDIAN; | |
75 | ohci_hcd_init(ohci); | |
76 | ||
77 | retval = usb_add_hcd(hcd, irq, SA_INTERRUPT); | |
78 | if (retval == 0) | |
79 | return retval; | |
80 | ||
81 | pr_debug("Removing PPC-SOC USB Controller\n"); | |
4fbd55f0 | 82 | |
1da177e4 LT |
83 | iounmap(hcd->regs); |
84 | err2: | |
85 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
86 | err1: | |
87 | usb_put_hcd(hcd); | |
88 | return retval; | |
89 | } | |
90 | ||
91 | ||
92 | /* may be called without controller electrically present */ | |
93 | /* may be called with controller, bus, and devices active */ | |
94 | ||
95 | /** | |
96 | * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs | |
97 | * @pdev: USB Host Controller being removed | |
98 | * Context: !in_interrupt() | |
99 | * | |
4fbd55f0 DF |
100 | * Reverses the effect of usb_hcd_ppc_soc_probe(). |
101 | * It is always called from a thread | |
1da177e4 LT |
102 | * context, normally "rmmod", "apmd", or something similar. |
103 | * | |
104 | */ | |
105 | static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd, | |
106 | struct platform_device *pdev) | |
107 | { | |
1da177e4 LT |
108 | usb_remove_hcd(hcd); |
109 | ||
110 | pr_debug("stopping PPC-SOC USB Controller\n"); | |
1da177e4 LT |
111 | |
112 | iounmap(hcd->regs); | |
113 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
e52b1d3a | 114 | usb_put_hcd(hcd); |
1da177e4 LT |
115 | } |
116 | ||
117 | static int __devinit | |
118 | ohci_ppc_soc_start(struct usb_hcd *hcd) | |
119 | { | |
120 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
121 | int ret; | |
122 | ||
123 | if ((ret = ohci_init(ohci)) < 0) | |
124 | return ret; | |
125 | ||
126 | if ((ret = ohci_run(ohci)) < 0) { | |
127 | err("can't start %s", ohci_to_hcd(ohci)->self.bus_name); | |
128 | ohci_stop(hcd); | |
129 | return ret; | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static const struct hc_driver ohci_ppc_soc_hc_driver = { | |
136 | .description = hcd_name, | |
137 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
138 | ||
139 | /* | |
140 | * generic hardware linkage | |
141 | */ | |
142 | .irq = ohci_irq, | |
143 | .flags = HCD_USB11 | HCD_MEMORY, | |
144 | ||
145 | /* | |
146 | * basic lifecycle operations | |
147 | */ | |
148 | .start = ohci_ppc_soc_start, | |
149 | .stop = ohci_stop, | |
150 | ||
151 | /* | |
152 | * managing i/o requests and associated device resources | |
153 | */ | |
154 | .urb_enqueue = ohci_urb_enqueue, | |
155 | .urb_dequeue = ohci_urb_dequeue, | |
156 | .endpoint_disable = ohci_endpoint_disable, | |
157 | ||
158 | /* | |
159 | * scheduling support | |
160 | */ | |
161 | .get_frame_number = ohci_get_frame, | |
162 | ||
163 | /* | |
164 | * root hub support | |
165 | */ | |
166 | .hub_status_data = ohci_hub_status_data, | |
167 | .hub_control = ohci_hub_control, | |
8ad7fe16 | 168 | #ifdef CONFIG_PM |
0c0382e3 AS |
169 | .bus_suspend = ohci_bus_suspend, |
170 | .bus_resume = ohci_bus_resume, | |
1da177e4 LT |
171 | #endif |
172 | .start_port_reset = ohci_start_port_reset, | |
173 | }; | |
174 | ||
175 | static int ohci_hcd_ppc_soc_drv_probe(struct device *dev) | |
176 | { | |
177 | struct platform_device *pdev = to_platform_device(dev); | |
178 | int ret; | |
179 | ||
180 | if (usb_disabled()) | |
181 | return -ENODEV; | |
182 | ||
183 | ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev); | |
184 | return ret; | |
185 | } | |
186 | ||
187 | static int ohci_hcd_ppc_soc_drv_remove(struct device *dev) | |
188 | { | |
189 | struct platform_device *pdev = to_platform_device(dev); | |
190 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
191 | ||
192 | usb_hcd_ppc_soc_remove(hcd, pdev); | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static struct device_driver ohci_hcd_ppc_soc_driver = { | |
197 | .name = "ppc-soc-ohci", | |
efa400db | 198 | .owner = THIS_MODULE, |
1da177e4 LT |
199 | .bus = &platform_bus_type, |
200 | .probe = ohci_hcd_ppc_soc_drv_probe, | |
201 | .remove = ohci_hcd_ppc_soc_drv_remove, | |
8ad7fe16 | 202 | #ifdef CONFIG_PM |
1da177e4 LT |
203 | /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/ |
204 | /*.resume = ohci_hcd_ppc_soc_drv_resume,*/ | |
205 | #endif | |
206 | }; | |
207 | ||
208 | static int __init ohci_hcd_ppc_soc_init(void) | |
209 | { | |
210 | pr_debug(DRIVER_INFO " (PPC SOC)\n"); | |
211 | pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed), | |
212 | sizeof(struct td)); | |
213 | ||
214 | return driver_register(&ohci_hcd_ppc_soc_driver); | |
215 | } | |
216 | ||
217 | static void __exit ohci_hcd_ppc_soc_cleanup(void) | |
218 | { | |
219 | driver_unregister(&ohci_hcd_ppc_soc_driver); | |
220 | } | |
221 | ||
222 | module_init(ohci_hcd_ppc_soc_init); | |
223 | module_exit(ohci_hcd_ppc_soc_cleanup); |