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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 | * | |
8 | * Bus Glue for Sharp LH7A404 | |
9 | * | |
10 | * Written by Christopher Hoover <ch@hpl.hp.com> | |
11 | * Based on fragments of previous driver by Rusell King et al. | |
12 | * | |
13 | * Modified for LH7A404 from ohci-sa1111.c | |
14 | * by Durgesh Pattamatta <pattamattad@sharpsec.com> | |
15 | * | |
16 | * This file is licenced under the GPL. | |
17 | */ | |
18 | ||
19 | #include <asm/hardware.h> | |
20 | ||
21 | ||
22 | extern int usb_disabled(void); | |
23 | ||
24 | /*-------------------------------------------------------------------------*/ | |
25 | ||
26 | static void lh7a404_start_hc(struct platform_device *dev) | |
27 | { | |
28 | printk(KERN_DEBUG __FILE__ | |
29 | ": starting LH7A404 OHCI USB Controller\n"); | |
30 | ||
31 | /* | |
32 | * Now, carefully enable the USB clock, and take | |
33 | * the USB host controller out of reset. | |
34 | */ | |
35 | CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */ | |
36 | udelay(1000); | |
37 | USBH_CMDSTATUS = OHCI_HCR; | |
38 | ||
39 | printk(KERN_DEBUG __FILE__ | |
40 | ": Clock to USB host has been enabled \n"); | |
41 | } | |
42 | ||
43 | static void lh7a404_stop_hc(struct platform_device *dev) | |
44 | { | |
45 | printk(KERN_DEBUG __FILE__ | |
46 | ": stopping LH7A404 OHCI USB Controller\n"); | |
47 | ||
48 | CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */ | |
49 | } | |
50 | ||
51 | ||
52 | /*-------------------------------------------------------------------------*/ | |
53 | ||
54 | /* configure so an HC device and id are always provided */ | |
55 | /* always called with process context; sleeping is OK */ | |
56 | ||
57 | ||
58 | /** | |
59 | * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs | |
60 | * Context: !in_interrupt() | |
61 | * | |
62 | * Allocates basic resources for this USB host controller, and | |
63 | * then invokes the start() method for the HCD associated with it | |
64 | * through the hotplug entry's driver_data. | |
65 | * | |
66 | */ | |
67 | int usb_hcd_lh7a404_probe (const struct hc_driver *driver, | |
68 | struct platform_device *dev) | |
69 | { | |
70 | int retval; | |
71 | struct usb_hcd *hcd; | |
72 | ||
73 | if (dev->resource[1].flags != IORESOURCE_IRQ) { | |
74 | pr_debug("resource[1] is not IORESOURCE_IRQ"); | |
75 | return -ENOMEM; | |
76 | } | |
77 | ||
78 | hcd = usb_create_hcd(driver, &dev->dev, "lh7a404"); | |
79 | if (!hcd) | |
80 | return -ENOMEM; | |
81 | hcd->rsrc_start = dev->resource[0].start; | |
82 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
83 | ||
84 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
85 | pr_debug("request_mem_region failed"); | |
86 | retval = -EBUSY; | |
87 | goto err1; | |
88 | } | |
89 | ||
90 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
91 | if (!hcd->regs) { | |
92 | pr_debug("ioremap failed"); | |
93 | retval = -ENOMEM; | |
94 | goto err2; | |
95 | } | |
96 | ||
97 | lh7a404_start_hc(dev); | |
98 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
99 | ||
100 | retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); | |
101 | if (retval == 0) | |
102 | return retval; | |
103 | ||
104 | lh7a404_stop_hc(dev); | |
105 | iounmap(hcd->regs); | |
106 | err2: | |
107 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
108 | err1: | |
109 | usb_put_hcd(hcd); | |
110 | return retval; | |
111 | } | |
112 | ||
113 | ||
114 | /* may be called without controller electrically present */ | |
115 | /* may be called with controller, bus, and devices active */ | |
116 | ||
117 | /** | |
118 | * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs | |
119 | * @dev: USB Host Controller being removed | |
120 | * Context: !in_interrupt() | |
121 | * | |
122 | * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking | |
123 | * the HCD's stop() method. It is always called from a thread | |
124 | * context, normally "rmmod", "apmd", or something similar. | |
125 | * | |
126 | */ | |
127 | void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev) | |
128 | { | |
129 | usb_remove_hcd(hcd); | |
130 | lh7a404_stop_hc(dev); | |
131 | iounmap(hcd->regs); | |
132 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
133 | usb_put_hcd(hcd); | |
134 | } | |
135 | ||
136 | /*-------------------------------------------------------------------------*/ | |
137 | ||
138 | static int __devinit | |
139 | ohci_lh7a404_start (struct usb_hcd *hcd) | |
140 | { | |
141 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
142 | int ret; | |
143 | ||
144 | ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci); | |
145 | if ((ret = ohci_init(ohci)) < 0) | |
146 | return ret; | |
147 | ||
148 | if ((ret = ohci_run (ohci)) < 0) { | |
149 | err ("can't start %s", hcd->self.bus_name); | |
150 | ohci_stop (hcd); | |
151 | return ret; | |
152 | } | |
153 | return 0; | |
154 | } | |
155 | ||
156 | /*-------------------------------------------------------------------------*/ | |
157 | ||
158 | static const struct hc_driver ohci_lh7a404_hc_driver = { | |
159 | .description = hcd_name, | |
160 | .product_desc = "LH7A404 OHCI", | |
161 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
162 | ||
163 | /* | |
164 | * generic hardware linkage | |
165 | */ | |
166 | .irq = ohci_irq, | |
167 | .flags = HCD_USB11 | HCD_MEMORY, | |
168 | ||
169 | /* | |
170 | * basic lifecycle operations | |
171 | */ | |
172 | .start = ohci_lh7a404_start, | |
173 | #ifdef CONFIG_PM | |
174 | /* suspend: ohci_lh7a404_suspend, -- tbd */ | |
175 | /* resume: ohci_lh7a404_resume, -- tbd */ | |
176 | #endif /*CONFIG_PM*/ | |
177 | .stop = ohci_stop, | |
178 | ||
179 | /* | |
180 | * managing i/o requests and associated device resources | |
181 | */ | |
182 | .urb_enqueue = ohci_urb_enqueue, | |
183 | .urb_dequeue = ohci_urb_dequeue, | |
184 | .endpoint_disable = ohci_endpoint_disable, | |
185 | ||
186 | /* | |
187 | * scheduling support | |
188 | */ | |
189 | .get_frame_number = ohci_get_frame, | |
190 | ||
191 | /* | |
192 | * root hub support | |
193 | */ | |
194 | .hub_status_data = ohci_hub_status_data, | |
195 | .hub_control = ohci_hub_control, | |
196 | #ifdef CONFIG_PM | |
197 | .bus_suspend = ohci_bus_suspend, | |
198 | .bus_resume = ohci_bus_resume, | |
199 | #endif | |
200 | .start_port_reset = ohci_start_port_reset, | |
201 | }; | |
202 | ||
203 | /*-------------------------------------------------------------------------*/ | |
204 | ||
205 | static int ohci_hcd_lh7a404_drv_probe(struct device *dev) | |
206 | { | |
207 | struct platform_device *pdev = to_platform_device(dev); | |
208 | int ret; | |
209 | ||
210 | pr_debug ("In ohci_hcd_lh7a404_drv_probe"); | |
211 | ||
212 | if (usb_disabled()) | |
213 | return -ENODEV; | |
214 | ||
215 | ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev); | |
216 | return ret; | |
217 | } | |
218 | ||
219 | static int ohci_hcd_lh7a404_drv_remove(struct device *dev) | |
220 | { | |
221 | struct platform_device *pdev = to_platform_device(dev); | |
222 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
223 | ||
224 | usb_hcd_lh7a404_remove(hcd, pdev); | |
225 | return 0; | |
226 | } | |
227 | /*TBD*/ | |
228 | /*static int ohci_hcd_lh7a404_drv_suspend(struct device *dev) | |
229 | { | |
230 | struct platform_device *pdev = to_platform_device(dev); | |
231 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | static int ohci_hcd_lh7a404_drv_resume(struct device *dev) | |
236 | { | |
237 | struct platform_device *pdev = to_platform_device(dev); | |
238 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
239 | ||
240 | ||
241 | return 0; | |
242 | } | |
243 | */ | |
244 | ||
245 | static struct device_driver ohci_hcd_lh7a404_driver = { | |
246 | .name = "lh7a404-ohci", | |
247 | .owner = THIS_MODULE, | |
248 | .bus = &platform_bus_type, | |
249 | .probe = ohci_hcd_lh7a404_drv_probe, | |
250 | .remove = ohci_hcd_lh7a404_drv_remove, | |
251 | /*.suspend = ohci_hcd_lh7a404_drv_suspend, */ | |
252 | /*.resume = ohci_hcd_lh7a404_drv_resume, */ | |
253 | }; | |
254 | ||
255 | static int __init ohci_hcd_lh7a404_init (void) | |
256 | { | |
257 | pr_debug (DRIVER_INFO " (LH7A404)"); | |
258 | pr_debug ("block sizes: ed %d td %d\n", | |
259 | sizeof (struct ed), sizeof (struct td)); | |
260 | ||
261 | return driver_register(&ohci_hcd_lh7a404_driver); | |
262 | } | |
263 | ||
264 | static void __exit ohci_hcd_lh7a404_cleanup (void) | |
265 | { | |
266 | driver_unregister(&ohci_hcd_lh7a404_driver); | |
267 | } | |
268 | ||
269 | module_init (ohci_hcd_lh7a404_init); | |
270 | module_exit (ohci_hcd_lh7a404_cleanup); |