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