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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 AMD Alchemy Au1xxx | |
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 | * Modified for AMD Alchemy Au1xxx | |
16 | * by Matt Porter <mporter@kernel.crashing.org> | |
17 | * | |
18 | * This file is licenced under the GPL. | |
19 | */ | |
20 | ||
d052d1be RK |
21 | #include <linux/platform_device.h> |
22 | ||
1da177e4 LT |
23 | #include <asm/mach-au1x00/au1000.h> |
24 | ||
25 | #define USBH_ENABLE_BE (1<<0) | |
26 | #define USBH_ENABLE_C (1<<1) | |
27 | #define USBH_ENABLE_E (1<<2) | |
28 | #define USBH_ENABLE_CE (1<<3) | |
29 | #define USBH_ENABLE_RD (1<<4) | |
30 | ||
31 | #ifdef __LITTLE_ENDIAN | |
32 | #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C) | |
33 | #elif __BIG_ENDIAN | |
34 | #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE) | |
35 | #else | |
36 | #error not byte order defined | |
37 | #endif | |
38 | ||
39 | extern int usb_disabled(void); | |
40 | ||
41 | /*-------------------------------------------------------------------------*/ | |
42 | ||
43 | static void au1xxx_start_hc(struct platform_device *dev) | |
44 | { | |
45 | printk(KERN_DEBUG __FILE__ | |
46 | ": starting Au1xxx OHCI USB Controller\n"); | |
47 | ||
48 | /* enable host controller */ | |
49 | au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG); | |
50 | udelay(1000); | |
51 | au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG); | |
52 | udelay(1000); | |
53 | ||
54 | /* wait for reset complete (read register twice; see au1500 errata) */ | |
55 | while (au_readl(USB_HOST_CONFIG), | |
56 | !(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD)) | |
57 | udelay(1000); | |
58 | ||
59 | printk(KERN_DEBUG __FILE__ | |
60 | ": Clock to USB host has been enabled \n"); | |
61 | } | |
62 | ||
63 | static void au1xxx_stop_hc(struct platform_device *dev) | |
64 | { | |
65 | printk(KERN_DEBUG __FILE__ | |
66 | ": stopping Au1xxx OHCI USB Controller\n"); | |
67 | ||
68 | /* Disable clock */ | |
69 | au_writel(readl((void *)USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG); | |
70 | } | |
71 | ||
72 | ||
73 | /*-------------------------------------------------------------------------*/ | |
74 | ||
75 | /* configure so an HC device and id are always provided */ | |
76 | /* always called with process context; sleeping is OK */ | |
77 | ||
78 | ||
79 | /** | |
80 | * usb_hcd_au1xxx_probe - initialize Au1xxx-based HCDs | |
81 | * Context: !in_interrupt() | |
82 | * | |
83 | * Allocates basic resources for this USB host controller, and | |
84 | * then invokes the start() method for the HCD associated with it | |
85 | * through the hotplug entry's driver_data. | |
86 | * | |
87 | */ | |
88 | int usb_hcd_au1xxx_probe (const struct hc_driver *driver, | |
89 | struct platform_device *dev) | |
90 | { | |
91 | int retval; | |
92 | struct usb_hcd *hcd; | |
93 | ||
94 | if(dev->resource[1].flags != IORESOURCE_IRQ) { | |
95 | pr_debug ("resource[1] is not IORESOURCE_IRQ"); | |
96 | return -ENOMEM; | |
97 | } | |
98 | ||
99 | hcd = usb_create_hcd(driver, &dev->dev, "au1xxx"); | |
100 | if (!hcd) | |
101 | return -ENOMEM; | |
102 | hcd->rsrc_start = dev->resource[0].start; | |
103 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
104 | ||
105 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
106 | pr_debug("request_mem_region failed"); | |
107 | retval = -EBUSY; | |
108 | goto err1; | |
109 | } | |
110 | ||
111 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
112 | if (!hcd->regs) { | |
113 | pr_debug("ioremap failed"); | |
114 | retval = -ENOMEM; | |
115 | goto err2; | |
116 | } | |
117 | ||
118 | au1xxx_start_hc(dev); | |
119 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
120 | ||
121 | retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); | |
122 | if (retval == 0) | |
123 | return retval; | |
124 | ||
125 | au1xxx_stop_hc(dev); | |
126 | iounmap(hcd->regs); | |
127 | err2: | |
128 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
129 | err1: | |
130 | usb_put_hcd(hcd); | |
131 | return retval; | |
132 | } | |
133 | ||
134 | ||
135 | /* may be called without controller electrically present */ | |
136 | /* may be called with controller, bus, and devices active */ | |
137 | ||
138 | /** | |
139 | * usb_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs | |
140 | * @dev: USB Host Controller being removed | |
141 | * Context: !in_interrupt() | |
142 | * | |
143 | * Reverses the effect of usb_hcd_au1xxx_probe(), first invoking | |
144 | * the HCD's stop() method. It is always called from a thread | |
145 | * context, normally "rmmod", "apmd", or something similar. | |
146 | * | |
147 | */ | |
148 | void usb_hcd_au1xxx_remove (struct usb_hcd *hcd, struct platform_device *dev) | |
149 | { | |
150 | usb_remove_hcd(hcd); | |
151 | au1xxx_stop_hc(dev); | |
152 | iounmap(hcd->regs); | |
153 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
154 | usb_put_hcd(hcd); | |
155 | } | |
156 | ||
157 | /*-------------------------------------------------------------------------*/ | |
158 | ||
159 | static int __devinit | |
160 | ohci_au1xxx_start (struct usb_hcd *hcd) | |
161 | { | |
162 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
163 | int ret; | |
164 | ||
165 | ohci_dbg (ohci, "ohci_au1xxx_start, ohci:%p", ohci); | |
166 | ||
167 | if ((ret = ohci_init (ohci)) < 0) | |
168 | return ret; | |
169 | ||
170 | if ((ret = ohci_run (ohci)) < 0) { | |
171 | err ("can't start %s", hcd->self.bus_name); | |
172 | ohci_stop (hcd); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | /*-------------------------------------------------------------------------*/ | |
180 | ||
181 | static const struct hc_driver ohci_au1xxx_hc_driver = { | |
182 | .description = hcd_name, | |
183 | .product_desc = "Au1xxx OHCI", | |
184 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
185 | ||
186 | /* | |
187 | * generic hardware linkage | |
188 | */ | |
189 | .irq = ohci_irq, | |
190 | .flags = HCD_USB11 | HCD_MEMORY, | |
191 | ||
192 | /* | |
193 | * basic lifecycle operations | |
194 | */ | |
195 | .start = ohci_au1xxx_start, | |
196 | #ifdef CONFIG_PM | |
197 | /* suspend: ohci_au1xxx_suspend, -- tbd */ | |
198 | /* resume: ohci_au1xxx_resume, -- tbd */ | |
199 | #endif /*CONFIG_PM*/ | |
200 | .stop = ohci_stop, | |
201 | ||
202 | /* | |
203 | * managing i/o requests and associated device resources | |
204 | */ | |
205 | .urb_enqueue = ohci_urb_enqueue, | |
206 | .urb_dequeue = ohci_urb_dequeue, | |
207 | .endpoint_disable = ohci_endpoint_disable, | |
208 | ||
209 | /* | |
210 | * scheduling support | |
211 | */ | |
212 | .get_frame_number = ohci_get_frame, | |
213 | ||
214 | /* | |
215 | * root hub support | |
216 | */ | |
217 | .hub_status_data = ohci_hub_status_data, | |
218 | .hub_control = ohci_hub_control, | |
9293677a | 219 | #ifdef CONFIG_PM |
0c0382e3 AS |
220 | .bus_suspend = ohci_bus_suspend, |
221 | .bus_resume = ohci_bus_resume, | |
9293677a DB |
222 | #endif |
223 | .start_port_reset = ohci_start_port_reset, | |
1da177e4 LT |
224 | }; |
225 | ||
226 | /*-------------------------------------------------------------------------*/ | |
227 | ||
228 | static int ohci_hcd_au1xxx_drv_probe(struct device *dev) | |
229 | { | |
230 | struct platform_device *pdev = to_platform_device(dev); | |
231 | int ret; | |
232 | ||
233 | pr_debug ("In ohci_hcd_au1xxx_drv_probe"); | |
234 | ||
235 | if (usb_disabled()) | |
236 | return -ENODEV; | |
237 | ||
238 | ret = usb_hcd_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev); | |
239 | return ret; | |
240 | } | |
241 | ||
242 | static int ohci_hcd_au1xxx_drv_remove(struct device *dev) | |
243 | { | |
244 | struct platform_device *pdev = to_platform_device(dev); | |
245 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
246 | ||
247 | usb_hcd_au1xxx_remove(hcd, pdev); | |
248 | return 0; | |
249 | } | |
250 | /*TBD*/ | |
251 | /*static int ohci_hcd_au1xxx_drv_suspend(struct device *dev) | |
252 | { | |
253 | struct platform_device *pdev = to_platform_device(dev); | |
254 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
255 | ||
256 | return 0; | |
257 | } | |
258 | static int ohci_hcd_au1xxx_drv_resume(struct device *dev) | |
259 | { | |
260 | struct platform_device *pdev = to_platform_device(dev); | |
261 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | */ | |
266 | ||
267 | static struct device_driver ohci_hcd_au1xxx_driver = { | |
268 | .name = "au1xxx-ohci", | |
efa400db | 269 | .owner = THIS_MODULE, |
1da177e4 LT |
270 | .bus = &platform_bus_type, |
271 | .probe = ohci_hcd_au1xxx_drv_probe, | |
272 | .remove = ohci_hcd_au1xxx_drv_remove, | |
273 | /*.suspend = ohci_hcd_au1xxx_drv_suspend, */ | |
274 | /*.resume = ohci_hcd_au1xxx_drv_resume, */ | |
275 | }; | |
276 | ||
277 | static int __init ohci_hcd_au1xxx_init (void) | |
278 | { | |
279 | pr_debug (DRIVER_INFO " (Au1xxx)"); | |
280 | pr_debug ("block sizes: ed %d td %d\n", | |
281 | sizeof (struct ed), sizeof (struct td)); | |
282 | ||
283 | return driver_register(&ohci_hcd_au1xxx_driver); | |
284 | } | |
285 | ||
286 | static void __exit ohci_hcd_au1xxx_cleanup (void) | |
287 | { | |
288 | driver_unregister(&ohci_hcd_au1xxx_driver); | |
289 | } | |
290 | ||
291 | module_init (ohci_hcd_au1xxx_init); | |
292 | module_exit (ohci_hcd_au1xxx_cleanup); |