Commit | Line | Data |
---|---|---|
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 | 21 | #include <linux/platform_device.h> |
de25968c | 22 | #include <linux/signal.h> |
d052d1be | 23 | |
1da177e4 LT |
24 | #include <asm/mach-au1x00/au1000.h> |
25 | ||
d5fb7f1b JC |
26 | #ifndef CONFIG_SOC_AU1200 |
27 | ||
1da177e4 LT |
28 | #define USBH_ENABLE_BE (1<<0) |
29 | #define USBH_ENABLE_C (1<<1) | |
30 | #define USBH_ENABLE_E (1<<2) | |
31 | #define USBH_ENABLE_CE (1<<3) | |
32 | #define USBH_ENABLE_RD (1<<4) | |
33 | ||
34 | #ifdef __LITTLE_ENDIAN | |
35 | #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C) | |
36 | #elif __BIG_ENDIAN | |
37 | #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE) | |
38 | #else | |
39 | #error not byte order defined | |
40 | #endif | |
41 | ||
d5fb7f1b JC |
42 | #else /* Au1200 */ |
43 | ||
44 | #define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG) | |
45 | #define USB_MCFG_PFEN (1<<31) | |
46 | #define USB_MCFG_RDCOMB (1<<30) | |
47 | #define USB_MCFG_SSDEN (1<<23) | |
48 | #define USB_MCFG_OHCCLKEN (1<<16) | |
49 | #define USB_MCFG_UCAM (1<<7) | |
50 | #define USB_MCFG_OBMEN (1<<1) | |
51 | #define USB_MCFG_OMEMEN (1<<0) | |
52 | ||
53 | #define USBH_ENABLE_CE USB_MCFG_OHCCLKEN | |
54 | #ifdef CONFIG_DMA_COHERENT | |
55 | #define USBH_ENABLE_INIT (USB_MCFG_OHCCLKEN \ | |
56 | | USB_MCFG_PFEN | USB_MCFG_RDCOMB \ | |
57 | | USB_MCFG_SSDEN | USB_MCFG_UCAM \ | |
58 | | USB_MCFG_OBMEN | USB_MCFG_OMEMEN) | |
59 | #else | |
60 | #define USBH_ENABLE_INIT (USB_MCFG_OHCCLKEN \ | |
61 | | USB_MCFG_PFEN | USB_MCFG_RDCOMB \ | |
62 | | USB_MCFG_SSDEN \ | |
63 | | USB_MCFG_OBMEN | USB_MCFG_OMEMEN) | |
64 | #endif | |
65 | #define USBH_DISABLE (USB_MCFG_OBMEN | USB_MCFG_OMEMEN) | |
66 | ||
67 | #endif /* Au1200 */ | |
68 | ||
1da177e4 LT |
69 | extern int usb_disabled(void); |
70 | ||
71 | /*-------------------------------------------------------------------------*/ | |
72 | ||
d5fb7f1b | 73 | static void au1xxx_start_ohc(struct platform_device *dev) |
1da177e4 LT |
74 | { |
75 | printk(KERN_DEBUG __FILE__ | |
76 | ": starting Au1xxx OHCI USB Controller\n"); | |
77 | ||
78 | /* enable host controller */ | |
d5fb7f1b JC |
79 | |
80 | #ifndef CONFIG_SOC_AU1200 | |
81 | ||
1da177e4 LT |
82 | au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG); |
83 | udelay(1000); | |
84 | au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG); | |
85 | udelay(1000); | |
86 | ||
d5fb7f1b JC |
87 | #else /* Au1200 */ |
88 | ||
89 | /* write HW defaults again in case Yamon cleared them */ | |
90 | if (au_readl(USB_HOST_CONFIG) == 0) { | |
91 | au_writel(0x00d02000, USB_HOST_CONFIG); | |
92 | au_readl(USB_HOST_CONFIG); | |
93 | udelay(1000); | |
94 | } | |
95 | au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); | |
96 | au_readl(USB_HOST_CONFIG); | |
97 | udelay(1000); | |
98 | au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); | |
99 | au_readl(USB_HOST_CONFIG); | |
100 | udelay(1000); | |
101 | ||
102 | #endif /* Au1200 */ | |
103 | ||
18577a61 | 104 | #ifndef CONFIG_SOC_AU1200 |
1da177e4 LT |
105 | /* wait for reset complete (read register twice; see au1500 errata) */ |
106 | while (au_readl(USB_HOST_CONFIG), | |
107 | !(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD)) | |
18577a61 | 108 | #endif |
1da177e4 LT |
109 | udelay(1000); |
110 | ||
111 | printk(KERN_DEBUG __FILE__ | |
112 | ": Clock to USB host has been enabled \n"); | |
113 | } | |
114 | ||
d5fb7f1b | 115 | static void au1xxx_stop_ohc(struct platform_device *dev) |
1da177e4 LT |
116 | { |
117 | printk(KERN_DEBUG __FILE__ | |
118 | ": stopping Au1xxx OHCI USB Controller\n"); | |
119 | ||
d5fb7f1b JC |
120 | #ifndef CONFIG_SOC_AU1200 |
121 | ||
1da177e4 | 122 | /* Disable clock */ |
05090fc9 | 123 | au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG); |
d5fb7f1b JC |
124 | |
125 | #else /* Au1200 */ | |
126 | ||
127 | /* Disable mem */ | |
128 | au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); | |
129 | udelay(1000); | |
130 | /* Disable clock */ | |
131 | au_writel(~USBH_ENABLE_CE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); | |
132 | au_readl(USB_HOST_CONFIG); | |
133 | #endif /* Au1200 */ | |
1da177e4 LT |
134 | } |
135 | ||
136 | ||
137 | /*-------------------------------------------------------------------------*/ | |
138 | ||
139 | /* configure so an HC device and id are always provided */ | |
140 | /* always called with process context; sleeping is OK */ | |
141 | ||
142 | ||
143 | /** | |
d5fb7f1b | 144 | * usb_ohci_au1xxx_probe - initialize Au1xxx-based HCDs |
1da177e4 LT |
145 | * Context: !in_interrupt() |
146 | * | |
147 | * Allocates basic resources for this USB host controller, and | |
148 | * then invokes the start() method for the HCD associated with it | |
149 | * through the hotplug entry's driver_data. | |
150 | * | |
151 | */ | |
d5fb7f1b | 152 | static int usb_ohci_au1xxx_probe(const struct hc_driver *driver, |
1da177e4 LT |
153 | struct platform_device *dev) |
154 | { | |
155 | int retval; | |
156 | struct usb_hcd *hcd; | |
157 | ||
d5fb7f1b JC |
158 | #if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT) |
159 | /* Au1200 AB USB does not support coherent memory */ | |
160 | if (!(read_c0_prid() & 0xff)) { | |
161 | pr_info("%s: this is chip revision AB !!\n", | |
18577a61 | 162 | dev->name); |
d5fb7f1b | 163 | pr_info("%s: update your board or re-configure the kernel\n", |
18577a61 | 164 | dev->name); |
d5fb7f1b JC |
165 | return -ENODEV; |
166 | } | |
167 | #endif | |
168 | ||
169 | if (dev->resource[1].flags != IORESOURCE_IRQ) { | |
170 | pr_debug("resource[1] is not IORESOURCE_IRQ\n"); | |
1da177e4 LT |
171 | return -ENOMEM; |
172 | } | |
173 | ||
174 | hcd = usb_create_hcd(driver, &dev->dev, "au1xxx"); | |
175 | if (!hcd) | |
176 | return -ENOMEM; | |
177 | hcd->rsrc_start = dev->resource[0].start; | |
178 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
179 | ||
180 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
d5fb7f1b | 181 | pr_debug("request_mem_region failed\n"); |
1da177e4 LT |
182 | retval = -EBUSY; |
183 | goto err1; | |
184 | } | |
185 | ||
186 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
187 | if (!hcd->regs) { | |
d5fb7f1b | 188 | pr_debug("ioremap failed\n"); |
1da177e4 LT |
189 | retval = -ENOMEM; |
190 | goto err2; | |
191 | } | |
192 | ||
d5fb7f1b | 193 | au1xxx_start_ohc(dev); |
1da177e4 LT |
194 | ohci_hcd_init(hcd_to_ohci(hcd)); |
195 | ||
d54b5caa | 196 | retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED | IRQF_SHARED); |
1da177e4 LT |
197 | if (retval == 0) |
198 | return retval; | |
199 | ||
d5fb7f1b | 200 | au1xxx_stop_ohc(dev); |
1da177e4 LT |
201 | iounmap(hcd->regs); |
202 | err2: | |
203 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
204 | err1: | |
205 | usb_put_hcd(hcd); | |
206 | return retval; | |
207 | } | |
208 | ||
209 | ||
210 | /* may be called without controller electrically present */ | |
211 | /* may be called with controller, bus, and devices active */ | |
212 | ||
213 | /** | |
214 | * usb_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs | |
215 | * @dev: USB Host Controller being removed | |
216 | * Context: !in_interrupt() | |
217 | * | |
218 | * Reverses the effect of usb_hcd_au1xxx_probe(), first invoking | |
219 | * the HCD's stop() method. It is always called from a thread | |
220 | * context, normally "rmmod", "apmd", or something similar. | |
221 | * | |
222 | */ | |
d5fb7f1b | 223 | static void usb_ohci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev) |
1da177e4 LT |
224 | { |
225 | usb_remove_hcd(hcd); | |
d5fb7f1b | 226 | au1xxx_stop_ohc(dev); |
1da177e4 LT |
227 | iounmap(hcd->regs); |
228 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
229 | usb_put_hcd(hcd); | |
230 | } | |
231 | ||
232 | /*-------------------------------------------------------------------------*/ | |
233 | ||
234 | static int __devinit | |
235 | ohci_au1xxx_start (struct usb_hcd *hcd) | |
236 | { | |
237 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
238 | int ret; | |
239 | ||
240 | ohci_dbg (ohci, "ohci_au1xxx_start, ohci:%p", ohci); | |
241 | ||
242 | if ((ret = ohci_init (ohci)) < 0) | |
243 | return ret; | |
244 | ||
245 | if ((ret = ohci_run (ohci)) < 0) { | |
246 | err ("can't start %s", hcd->self.bus_name); | |
247 | ohci_stop (hcd); | |
248 | return ret; | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | /*-------------------------------------------------------------------------*/ | |
255 | ||
256 | static const struct hc_driver ohci_au1xxx_hc_driver = { | |
257 | .description = hcd_name, | |
258 | .product_desc = "Au1xxx OHCI", | |
259 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
260 | ||
261 | /* | |
262 | * generic hardware linkage | |
263 | */ | |
264 | .irq = ohci_irq, | |
265 | .flags = HCD_USB11 | HCD_MEMORY, | |
266 | ||
267 | /* | |
268 | * basic lifecycle operations | |
269 | */ | |
270 | .start = ohci_au1xxx_start, | |
1da177e4 | 271 | .stop = ohci_stop, |
dd9048af | 272 | .shutdown = ohci_shutdown, |
1da177e4 LT |
273 | |
274 | /* | |
275 | * managing i/o requests and associated device resources | |
276 | */ | |
277 | .urb_enqueue = ohci_urb_enqueue, | |
278 | .urb_dequeue = ohci_urb_dequeue, | |
279 | .endpoint_disable = ohci_endpoint_disable, | |
280 | ||
281 | /* | |
282 | * scheduling support | |
283 | */ | |
284 | .get_frame_number = ohci_get_frame, | |
285 | ||
286 | /* | |
287 | * root hub support | |
288 | */ | |
289 | .hub_status_data = ohci_hub_status_data, | |
290 | .hub_control = ohci_hub_control, | |
09ca8adb | 291 | .hub_irq_enable = ohci_rhsc_enable, |
9293677a | 292 | #ifdef CONFIG_PM |
0c0382e3 AS |
293 | .bus_suspend = ohci_bus_suspend, |
294 | .bus_resume = ohci_bus_resume, | |
9293677a DB |
295 | #endif |
296 | .start_port_reset = ohci_start_port_reset, | |
1da177e4 LT |
297 | }; |
298 | ||
299 | /*-------------------------------------------------------------------------*/ | |
300 | ||
3ae5eaec | 301 | static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev) |
1da177e4 | 302 | { |
1da177e4 LT |
303 | int ret; |
304 | ||
305 | pr_debug ("In ohci_hcd_au1xxx_drv_probe"); | |
306 | ||
307 | if (usb_disabled()) | |
308 | return -ENODEV; | |
309 | ||
d5fb7f1b | 310 | ret = usb_ohci_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev); |
1da177e4 LT |
311 | return ret; |
312 | } | |
313 | ||
3ae5eaec | 314 | static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev) |
1da177e4 | 315 | { |
3ae5eaec | 316 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
1da177e4 | 317 | |
d5fb7f1b | 318 | usb_ohci_au1xxx_remove(hcd, pdev); |
1da177e4 LT |
319 | return 0; |
320 | } | |
321 | /*TBD*/ | |
3ae5eaec | 322 | /*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev) |
1da177e4 | 323 | { |
3ae5eaec | 324 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
325 | |
326 | return 0; | |
327 | } | |
3ae5eaec | 328 | static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev) |
1da177e4 | 329 | { |
3ae5eaec | 330 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
1da177e4 LT |
331 | |
332 | return 0; | |
333 | } | |
334 | */ | |
335 | ||
3ae5eaec | 336 | static struct platform_driver ohci_hcd_au1xxx_driver = { |
1da177e4 LT |
337 | .probe = ohci_hcd_au1xxx_drv_probe, |
338 | .remove = ohci_hcd_au1xxx_drv_remove, | |
dd9048af | 339 | .shutdown = usb_hcd_platform_shutdown, |
1da177e4 LT |
340 | /*.suspend = ohci_hcd_au1xxx_drv_suspend, */ |
341 | /*.resume = ohci_hcd_au1xxx_drv_resume, */ | |
3ae5eaec RK |
342 | .driver = { |
343 | .name = "au1xxx-ohci", | |
344 | .owner = THIS_MODULE, | |
345 | }, | |
1da177e4 LT |
346 | }; |
347 | ||
f4fce61d | 348 | MODULE_ALIAS("platform:au1xxx-ohci"); |