Commit | Line | Data |
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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 | * | |
8 | * Bus Glue for Sharp LH7A404 | |
9 | * | |
10 | * Written by Christopher Hoover <ch@hpl.hp.com> | |
ac310bb5 | 11 | * Based on fragments of previous driver by Russell King et al. |
1da177e4 LT |
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 | ||
d052d1be | 19 | #include <linux/platform_device.h> |
de25968c | 20 | #include <linux/signal.h> |
d052d1be | 21 | |
a09e64fb | 22 | #include <mach/hardware.h> |
1da177e4 LT |
23 | |
24 | ||
25 | extern int usb_disabled(void); | |
26 | ||
27 | /*-------------------------------------------------------------------------*/ | |
28 | ||
29 | static void lh7a404_start_hc(struct platform_device *dev) | |
30 | { | |
31 | printk(KERN_DEBUG __FILE__ | |
32 | ": starting LH7A404 OHCI USB Controller\n"); | |
33 | ||
34 | /* | |
35 | * Now, carefully enable the USB clock, and take | |
36 | * the USB host controller out of reset. | |
37 | */ | |
38 | CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */ | |
39 | udelay(1000); | |
40 | USBH_CMDSTATUS = OHCI_HCR; | |
dd9048af | 41 | |
1da177e4 LT |
42 | printk(KERN_DEBUG __FILE__ |
43 | ": Clock to USB host has been enabled \n"); | |
44 | } | |
45 | ||
46 | static void lh7a404_stop_hc(struct platform_device *dev) | |
47 | { | |
48 | printk(KERN_DEBUG __FILE__ | |
49 | ": stopping LH7A404 OHCI USB Controller\n"); | |
50 | ||
51 | CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */ | |
52 | } | |
53 | ||
54 | ||
55 | /*-------------------------------------------------------------------------*/ | |
56 | ||
57 | /* configure so an HC device and id are always provided */ | |
58 | /* always called with process context; sleeping is OK */ | |
59 | ||
60 | ||
61 | /** | |
62 | * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs | |
63 | * Context: !in_interrupt() | |
64 | * | |
65 | * Allocates basic resources for this USB host controller, and | |
66 | * then invokes the start() method for the HCD associated with it | |
67 | * through the hotplug entry's driver_data. | |
68 | * | |
69 | */ | |
70 | int usb_hcd_lh7a404_probe (const struct hc_driver *driver, | |
71 | struct platform_device *dev) | |
72 | { | |
73 | int retval; | |
74 | struct usb_hcd *hcd; | |
75 | ||
76 | if (dev->resource[1].flags != IORESOURCE_IRQ) { | |
77 | pr_debug("resource[1] is not IORESOURCE_IRQ"); | |
78 | return -ENOMEM; | |
79 | } | |
80 | ||
81 | hcd = usb_create_hcd(driver, &dev->dev, "lh7a404"); | |
82 | if (!hcd) | |
83 | return -ENOMEM; | |
84 | hcd->rsrc_start = dev->resource[0].start; | |
85 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
86 | ||
87 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
88 | pr_debug("request_mem_region failed"); | |
89 | retval = -EBUSY; | |
90 | goto err1; | |
91 | } | |
dd9048af | 92 | |
1da177e4 LT |
93 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
94 | if (!hcd->regs) { | |
95 | pr_debug("ioremap failed"); | |
96 | retval = -ENOMEM; | |
97 | goto err2; | |
98 | } | |
99 | ||
100 | lh7a404_start_hc(dev); | |
101 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
102 | ||
d54b5caa | 103 | retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); |
1da177e4 LT |
104 | if (retval == 0) |
105 | return retval; | |
106 | ||
107 | lh7a404_stop_hc(dev); | |
108 | iounmap(hcd->regs); | |
109 | err2: | |
110 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
111 | err1: | |
112 | usb_put_hcd(hcd); | |
113 | return retval; | |
114 | } | |
115 | ||
116 | ||
117 | /* may be called without controller electrically present */ | |
118 | /* may be called with controller, bus, and devices active */ | |
119 | ||
120 | /** | |
121 | * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs | |
122 | * @dev: USB Host Controller being removed | |
123 | * Context: !in_interrupt() | |
124 | * | |
125 | * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking | |
126 | * the HCD's stop() method. It is always called from a thread | |
127 | * context, normally "rmmod", "apmd", or something similar. | |
128 | * | |
129 | */ | |
130 | void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev) | |
131 | { | |
132 | usb_remove_hcd(hcd); | |
133 | lh7a404_stop_hc(dev); | |
134 | iounmap(hcd->regs); | |
135 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
136 | usb_put_hcd(hcd); | |
137 | } | |
138 | ||
139 | /*-------------------------------------------------------------------------*/ | |
140 | ||
141 | static int __devinit | |
142 | ohci_lh7a404_start (struct usb_hcd *hcd) | |
143 | { | |
144 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
145 | int ret; | |
146 | ||
147 | ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci); | |
148 | if ((ret = ohci_init(ohci)) < 0) | |
149 | return ret; | |
150 | ||
151 | if ((ret = ohci_run (ohci)) < 0) { | |
152 | err ("can't start %s", hcd->self.bus_name); | |
153 | ohci_stop (hcd); | |
154 | return ret; | |
155 | } | |
156 | return 0; | |
157 | } | |
158 | ||
159 | /*-------------------------------------------------------------------------*/ | |
160 | ||
161 | static const struct hc_driver ohci_lh7a404_hc_driver = { | |
162 | .description = hcd_name, | |
163 | .product_desc = "LH7A404 OHCI", | |
164 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
165 | ||
166 | /* | |
167 | * generic hardware linkage | |
168 | */ | |
169 | .irq = ohci_irq, | |
170 | .flags = HCD_USB11 | HCD_MEMORY, | |
171 | ||
172 | /* | |
173 | * basic lifecycle operations | |
174 | */ | |
175 | .start = ohci_lh7a404_start, | |
1da177e4 | 176 | .stop = ohci_stop, |
dd9048af | 177 | .shutdown = ohci_shutdown, |
1da177e4 LT |
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, | |
9293677a | 196 | #ifdef CONFIG_PM |
0c0382e3 AS |
197 | .bus_suspend = ohci_bus_suspend, |
198 | .bus_resume = ohci_bus_resume, | |
9293677a DB |
199 | #endif |
200 | .start_port_reset = ohci_start_port_reset, | |
1da177e4 LT |
201 | }; |
202 | ||
203 | /*-------------------------------------------------------------------------*/ | |
204 | ||
3ae5eaec | 205 | static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev) |
1da177e4 | 206 | { |
1da177e4 LT |
207 | int ret; |
208 | ||
209 | pr_debug ("In ohci_hcd_lh7a404_drv_probe"); | |
210 | ||
211 | if (usb_disabled()) | |
212 | return -ENODEV; | |
213 | ||
214 | ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev); | |
215 | return ret; | |
216 | } | |
217 | ||
3ae5eaec | 218 | static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev) |
1da177e4 | 219 | { |
87cf2039 | 220 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
1da177e4 LT |
221 | |
222 | usb_hcd_lh7a404_remove(hcd, pdev); | |
223 | return 0; | |
224 | } | |
225 | /*TBD*/ | |
3ae5eaec | 226 | /*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev) |
1da177e4 | 227 | { |
3ae5eaec | 228 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
229 | |
230 | return 0; | |
231 | } | |
3ae5eaec | 232 | static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev) |
1da177e4 | 233 | { |
3ae5eaec | 234 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
235 | |
236 | ||
237 | return 0; | |
238 | } | |
239 | */ | |
240 | ||
3ae5eaec | 241 | static struct platform_driver ohci_hcd_lh7a404_driver = { |
1da177e4 LT |
242 | .probe = ohci_hcd_lh7a404_drv_probe, |
243 | .remove = ohci_hcd_lh7a404_drv_remove, | |
dd9048af | 244 | .shutdown = usb_hcd_platform_shutdown, |
1da177e4 LT |
245 | /*.suspend = ohci_hcd_lh7a404_drv_suspend, */ |
246 | /*.resume = ohci_hcd_lh7a404_drv_resume, */ | |
3ae5eaec RK |
247 | .driver = { |
248 | .name = "lh7a404-ohci", | |
249 | .owner = THIS_MODULE, | |
250 | }, | |
1da177e4 LT |
251 | }; |
252 | ||
f4fce61d | 253 | MODULE_ALIAS("platform:lh7a404-ohci"); |