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3eb0c5f4 BD |
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 | * USB Bus Glue for Samsung S3C2410 | |
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 S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c | |
14 | * by Ben Dooks, <ben@simtec.co.uk> | |
15 | * Copyright (C) 2004 Simtec Electronics | |
16 | * | |
17 | * Thanks to basprog@mail.ru for updates to newer kernels | |
18 | * | |
19 | * This file is licenced under the GPL. | |
20 | */ | |
21 | ||
22 | #include <asm/hardware.h> | |
23 | #include <asm/mach-types.h> | |
24 | #include <asm/hardware/clock.h> | |
25 | #include <asm/arch/usb-control.h> | |
26 | ||
27 | #define valid_port(idx) ((idx) == 1 || (idx) == 2) | |
28 | ||
29 | /* clock device associated with the hcd */ | |
30 | ||
31 | static struct clk *clk; | |
32 | ||
33 | /* forward definitions */ | |
34 | ||
35 | static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); | |
36 | ||
37 | /* conversion functions */ | |
38 | ||
39 | struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd) | |
40 | { | |
41 | return hcd->self.controller->platform_data; | |
42 | } | |
43 | ||
44 | static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd) | |
45 | { | |
46 | struct s3c2410_hcd_info *info = dev->dev.platform_data; | |
47 | ||
48 | dev_dbg(&dev->dev, "s3c2410_start_hc:\n"); | |
49 | clk_enable(clk); | |
50 | ||
51 | if (info != NULL) { | |
52 | info->hcd = hcd; | |
53 | info->report_oc = s3c2410_hcd_oc; | |
54 | ||
55 | if (info->enable_oc != NULL) { | |
56 | (info->enable_oc)(info, 1); | |
57 | } | |
58 | } | |
59 | } | |
60 | ||
61 | static void s3c2410_stop_hc(struct platform_device *dev) | |
62 | { | |
63 | struct s3c2410_hcd_info *info = dev->dev.platform_data; | |
64 | ||
65 | dev_dbg(&dev->dev, "s3c2410_stop_hc:\n"); | |
66 | ||
67 | if (info != NULL) { | |
68 | info->report_oc = NULL; | |
69 | info->hcd = NULL; | |
70 | ||
71 | if (info->enable_oc != NULL) { | |
72 | (info->enable_oc)(info, 0); | |
73 | } | |
74 | } | |
75 | ||
76 | clk_disable(clk); | |
77 | } | |
78 | ||
79 | /* ohci_s3c2410_hub_status_data | |
80 | * | |
81 | * update the status data from the hub with anything that | |
82 | * has been detected by our system | |
83 | */ | |
84 | ||
85 | static int | |
86 | ohci_s3c2410_hub_status_data (struct usb_hcd *hcd, char *buf) | |
87 | { | |
88 | struct s3c2410_hcd_info *info = to_s3c2410_info(hcd); | |
89 | struct s3c2410_hcd_port *port; | |
90 | int orig; | |
91 | int portno; | |
92 | ||
93 | orig = ohci_hub_status_data (hcd, buf); | |
94 | ||
95 | if (info == NULL) | |
96 | return orig; | |
97 | ||
98 | port = &info->port[0]; | |
99 | ||
100 | /* mark any changed port as changed */ | |
101 | ||
102 | for (portno = 0; portno < 2; port++, portno++) { | |
103 | if (port->oc_changed == 1 && | |
104 | port->flags & S3C_HCDFLG_USED) { | |
105 | dev_dbg(hcd->self.controller, | |
106 | "oc change on port %d\n", portno); | |
107 | ||
108 | if (orig < 1) | |
109 | orig = 1; | |
110 | ||
111 | buf[0] |= 1<<(portno+1); | |
112 | } | |
113 | } | |
114 | ||
115 | return orig; | |
116 | } | |
117 | ||
118 | /* s3c2410_usb_set_power | |
119 | * | |
120 | * configure the power on a port, by calling the platform device | |
121 | * routine registered with the platform device | |
122 | */ | |
123 | ||
124 | static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info, | |
125 | int port, int to) | |
126 | { | |
127 | if (info == NULL) | |
128 | return; | |
129 | ||
130 | if (info->power_control != NULL) { | |
131 | info->port[port-1].power = to; | |
132 | (info->power_control)(port, to); | |
133 | } | |
134 | } | |
135 | ||
136 | /* ohci_s3c2410_hub_control | |
137 | * | |
138 | * look at control requests to the hub, and see if we need | |
139 | * to take any action or over-ride the results from the | |
140 | * request. | |
141 | */ | |
142 | ||
143 | static int ohci_s3c2410_hub_control ( | |
144 | struct usb_hcd *hcd, | |
145 | u16 typeReq, | |
146 | u16 wValue, | |
147 | u16 wIndex, | |
148 | char *buf, | |
149 | u16 wLength) | |
150 | { | |
151 | struct s3c2410_hcd_info *info = to_s3c2410_info(hcd); | |
152 | struct usb_hub_descriptor *desc; | |
153 | int ret = -EINVAL; | |
154 | u32 *data = (u32 *)buf; | |
155 | ||
156 | dev_dbg(hcd->self.controller, | |
157 | "s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
158 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
159 | ||
160 | /* if we are only an humble host without any special capabilites | |
161 | * process the request straight away and exit */ | |
162 | ||
163 | if (info == NULL) { | |
164 | ret = ohci_hub_control(hcd, typeReq, wValue, | |
165 | wIndex, buf, wLength); | |
166 | goto out; | |
167 | } | |
168 | ||
169 | /* check the request to see if it needs handling */ | |
170 | ||
171 | switch (typeReq) { | |
172 | case SetPortFeature: | |
173 | if (wValue == USB_PORT_FEAT_POWER) { | |
174 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
175 | s3c2410_usb_set_power(info, wIndex, 1); | |
176 | goto out; | |
177 | } | |
178 | break; | |
179 | ||
180 | case ClearPortFeature: | |
181 | switch (wValue) { | |
182 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
183 | dev_dbg(hcd->self.controller, | |
184 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
185 | ||
186 | if (valid_port(wIndex)) { | |
187 | info->port[wIndex-1].oc_changed = 0; | |
188 | info->port[wIndex-1].oc_status = 0; | |
189 | } | |
190 | ||
191 | goto out; | |
192 | ||
193 | case USB_PORT_FEAT_OVER_CURRENT: | |
194 | dev_dbg(hcd->self.controller, | |
195 | "ClearPortFeature: OVER_CURRENT\n"); | |
196 | ||
197 | if (valid_port(wIndex)) { | |
198 | info->port[wIndex-1].oc_status = 0; | |
199 | } | |
200 | ||
201 | goto out; | |
202 | ||
203 | case USB_PORT_FEAT_POWER: | |
204 | dev_dbg(hcd->self.controller, | |
205 | "ClearPortFeature: POWER\n"); | |
206 | ||
207 | if (valid_port(wIndex)) { | |
208 | s3c2410_usb_set_power(info, wIndex, 0); | |
209 | return 0; | |
210 | } | |
211 | } | |
212 | break; | |
213 | } | |
214 | ||
215 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); | |
216 | if (ret) | |
217 | goto out; | |
218 | ||
219 | switch (typeReq) { | |
220 | case GetHubDescriptor: | |
221 | ||
222 | /* update the hub's descriptor */ | |
223 | ||
224 | desc = (struct usb_hub_descriptor *)buf; | |
225 | ||
226 | if (info->power_control == NULL) | |
227 | return ret; | |
228 | ||
229 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
230 | desc->wHubCharacteristics); | |
231 | ||
232 | /* remove the old configurations for power-switching, and | |
233 | * over-current protection, and insert our new configuration | |
234 | */ | |
235 | ||
236 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
237 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); | |
238 | ||
239 | if (info->enable_oc) { | |
240 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
241 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); | |
242 | } | |
243 | ||
244 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
245 | desc->wHubCharacteristics); | |
246 | ||
247 | return ret; | |
248 | ||
249 | case GetPortStatus: | |
250 | /* check port status */ | |
251 | ||
252 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
253 | ||
254 | if (valid_port(wIndex)) { | |
255 | if (info->port[wIndex-1].oc_changed) { | |
256 | *data |= cpu_to_le32(RH_PS_OCIC); | |
257 | } | |
258 | ||
259 | if (info->port[wIndex-1].oc_status) { | |
260 | *data |= cpu_to_le32(RH_PS_POCI); | |
261 | } | |
262 | } | |
263 | } | |
264 | ||
265 | out: | |
266 | return ret; | |
267 | } | |
268 | ||
269 | /* s3c2410_hcd_oc | |
270 | * | |
271 | * handle an over-current report | |
272 | */ | |
273 | ||
274 | static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc) | |
275 | { | |
276 | struct s3c2410_hcd_port *port; | |
277 | struct usb_hcd *hcd; | |
278 | unsigned long flags; | |
279 | int portno; | |
280 | ||
281 | if (info == NULL) | |
282 | return; | |
283 | ||
284 | port = &info->port[0]; | |
285 | hcd = info->hcd; | |
286 | ||
287 | local_irq_save(flags); | |
288 | ||
289 | for (portno = 0; portno < 2; port++, portno++) { | |
290 | if (port_oc & (1<<portno) && | |
291 | port->flags & S3C_HCDFLG_USED) { | |
292 | port->oc_status = 1; | |
293 | port->oc_changed = 1; | |
294 | ||
295 | /* ok, once over-current is detected, | |
296 | the port needs to be powered down */ | |
297 | s3c2410_usb_set_power(info, portno+1, 0); | |
298 | } | |
299 | } | |
300 | ||
301 | local_irq_restore(flags); | |
302 | } | |
303 | ||
304 | /* may be called without controller electrically present */ | |
305 | /* may be called with controller, bus, and devices active */ | |
306 | ||
307 | /* | |
308 | * usb_hcd_s3c2410_remove - shutdown processing for HCD | |
309 | * @dev: USB Host Controller being removed | |
310 | * Context: !in_interrupt() | |
311 | * | |
312 | * Reverses the effect of usb_hcd_3c2410_probe(), first invoking | |
313 | * the HCD's stop() method. It is always called from a thread | |
314 | * context, normally "rmmod", "apmd", or something similar. | |
315 | * | |
316 | */ | |
317 | ||
318 | void usb_hcd_s3c2410_remove (struct usb_hcd *hcd, struct platform_device *dev) | |
319 | { | |
320 | usb_remove_hcd(hcd); | |
321 | s3c2410_stop_hc(dev); | |
322 | iounmap(hcd->regs); | |
323 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
324 | usb_put_hcd(hcd); | |
325 | } | |
326 | ||
327 | /** | |
328 | * usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs | |
329 | * Context: !in_interrupt() | |
330 | * | |
331 | * Allocates basic resources for this USB host controller, and | |
332 | * then invokes the start() method for the HCD associated with it | |
333 | * through the hotplug entry's driver_data. | |
334 | * | |
335 | */ | |
336 | int usb_hcd_s3c2410_probe (const struct hc_driver *driver, | |
337 | struct platform_device *dev) | |
338 | { | |
339 | struct usb_hcd *hcd = NULL; | |
340 | int retval; | |
341 | ||
342 | s3c2410_usb_set_power(dev->dev.platform_data, 0, 1); | |
343 | s3c2410_usb_set_power(dev->dev.platform_data, 1, 1); | |
344 | ||
345 | hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx"); | |
346 | if (hcd == NULL) | |
347 | return -ENOMEM; | |
348 | ||
349 | hcd->rsrc_start = dev->resource[0].start; | |
350 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
351 | ||
352 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
353 | dev_err(&dev->dev, "request_mem_region failed"); | |
354 | retval = -EBUSY; | |
355 | goto err0; | |
356 | } | |
357 | ||
358 | clk = clk_get(NULL, "usb-host"); | |
359 | if (IS_ERR(clk)) { | |
360 | dev_err(&dev->dev, "cannot get usb-host clock\n"); | |
361 | retval = -ENOENT; | |
362 | goto err1; | |
363 | } | |
364 | ||
365 | clk_use(clk); | |
366 | s3c2410_start_hc(dev, hcd); | |
367 | ||
368 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
369 | if (!hcd->regs) { | |
370 | dev_err(&dev->dev, "ioremap failed\n"); | |
371 | retval = -ENOMEM; | |
372 | goto err2; | |
373 | } | |
374 | ||
375 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
376 | ||
377 | retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); | |
378 | if (retval != 0) | |
379 | goto err2; | |
380 | ||
381 | return 0; | |
382 | ||
383 | err2: | |
384 | s3c2410_stop_hc(dev); | |
385 | iounmap(hcd->regs); | |
386 | clk_unuse(clk); | |
387 | clk_put(clk); | |
388 | ||
389 | err1: | |
390 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
391 | ||
392 | err0: | |
393 | usb_put_hcd(hcd); | |
394 | return retval; | |
395 | } | |
396 | ||
397 | /*-------------------------------------------------------------------------*/ | |
398 | ||
399 | static int | |
400 | ohci_s3c2410_start (struct usb_hcd *hcd) | |
401 | { | |
402 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
403 | int ret; | |
404 | ||
405 | if ((ret = ohci_init(ohci)) < 0) | |
406 | return ret; | |
407 | ||
408 | if ((ret = ohci_run (ohci)) < 0) { | |
409 | err ("can't start %s", hcd->self.bus_name); | |
410 | ohci_stop (hcd); | |
411 | return ret; | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | ||
418 | static const struct hc_driver ohci_s3c2410_hc_driver = { | |
419 | .description = hcd_name, | |
420 | .product_desc = "S3C24XX OHCI", | |
421 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
422 | ||
423 | /* | |
424 | * generic hardware linkage | |
425 | */ | |
426 | .irq = ohci_irq, | |
427 | .flags = HCD_USB11 | HCD_MEMORY, | |
428 | ||
429 | /* | |
430 | * basic lifecycle operations | |
431 | */ | |
432 | .start = ohci_s3c2410_start, | |
433 | .stop = ohci_stop, | |
434 | ||
435 | /* | |
436 | * managing i/o requests and associated device resources | |
437 | */ | |
438 | .urb_enqueue = ohci_urb_enqueue, | |
439 | .urb_dequeue = ohci_urb_dequeue, | |
440 | .endpoint_disable = ohci_endpoint_disable, | |
441 | ||
442 | /* | |
443 | * scheduling support | |
444 | */ | |
445 | .get_frame_number = ohci_get_frame, | |
446 | ||
447 | /* | |
448 | * root hub support | |
449 | */ | |
450 | .hub_status_data = ohci_s3c2410_hub_status_data, | |
451 | .hub_control = ohci_s3c2410_hub_control, | |
452 | ||
453 | #if defined(CONFIG_USB_SUSPEND) && 0 | |
454 | .hub_suspend = ohci_hub_suspend, | |
455 | .hub_resume = ohci_hub_resume, | |
456 | #endif | |
457 | }; | |
458 | ||
459 | /* device driver */ | |
460 | ||
461 | static int ohci_hcd_s3c2410_drv_probe(struct device *dev) | |
462 | { | |
463 | struct platform_device *pdev = to_platform_device(dev); | |
464 | return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev); | |
465 | } | |
466 | ||
467 | static int ohci_hcd_s3c2410_drv_remove(struct device *dev) | |
468 | { | |
469 | struct platform_device *pdev = to_platform_device(dev); | |
470 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
471 | ||
472 | usb_hcd_s3c2410_remove(hcd, pdev); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | static struct device_driver ohci_hcd_s3c2410_driver = { | |
477 | .name = "s3c2410-ohci", | |
478 | .bus = &platform_bus_type, | |
479 | .probe = ohci_hcd_s3c2410_drv_probe, | |
480 | .remove = ohci_hcd_s3c2410_drv_remove, | |
481 | /*.suspend = ohci_hcd_s3c2410_drv_suspend, */ | |
482 | /*.resume = ohci_hcd_s3c2410_drv_resume, */ | |
483 | }; | |
484 | ||
485 | static int __init ohci_hcd_s3c2410_init (void) | |
486 | { | |
487 | return driver_register(&ohci_hcd_s3c2410_driver); | |
488 | } | |
489 | ||
490 | static void __exit ohci_hcd_s3c2410_cleanup (void) | |
491 | { | |
492 | driver_unregister(&ohci_hcd_s3c2410_driver); | |
493 | } | |
494 | ||
495 | module_init (ohci_hcd_s3c2410_init); | |
496 | module_exit (ohci_hcd_s3c2410_cleanup); |