Commit | Line | Data |
---|---|---|
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> | |
ac310bb5 | 11 | * Based on fragments of previous driver by Russell King et al. |
3eb0c5f4 BD |
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 | ||
d052d1be | 22 | #include <linux/platform_device.h> |
f8ce2547 | 23 | #include <linux/clk.h> |
d052d1be | 24 | |
a09e64fb RK |
25 | #include <mach/hardware.h> |
26 | #include <mach/usb-control.h> | |
3eb0c5f4 BD |
27 | |
28 | #define valid_port(idx) ((idx) == 1 || (idx) == 2) | |
29 | ||
30 | /* clock device associated with the hcd */ | |
31 | ||
32 | static struct clk *clk; | |
3799c401 | 33 | static struct clk *usb_clk; |
3eb0c5f4 BD |
34 | |
35 | /* forward definitions */ | |
36 | ||
37 | static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); | |
38 | ||
39 | /* conversion functions */ | |
40 | ||
f096e043 | 41 | static struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd) |
3eb0c5f4 BD |
42 | { |
43 | return hcd->self.controller->platform_data; | |
44 | } | |
45 | ||
46 | static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd) | |
47 | { | |
48 | struct s3c2410_hcd_info *info = dev->dev.platform_data; | |
49 | ||
50 | dev_dbg(&dev->dev, "s3c2410_start_hc:\n"); | |
3799c401 BD |
51 | |
52 | clk_enable(usb_clk); | |
53 | mdelay(2); /* let the bus clock stabilise */ | |
54 | ||
3eb0c5f4 BD |
55 | clk_enable(clk); |
56 | ||
57 | if (info != NULL) { | |
58 | info->hcd = hcd; | |
59 | info->report_oc = s3c2410_hcd_oc; | |
60 | ||
61 | if (info->enable_oc != NULL) { | |
62 | (info->enable_oc)(info, 1); | |
63 | } | |
64 | } | |
65 | } | |
66 | ||
67 | static void s3c2410_stop_hc(struct platform_device *dev) | |
68 | { | |
69 | struct s3c2410_hcd_info *info = dev->dev.platform_data; | |
70 | ||
71 | dev_dbg(&dev->dev, "s3c2410_stop_hc:\n"); | |
72 | ||
73 | if (info != NULL) { | |
74 | info->report_oc = NULL; | |
75 | info->hcd = NULL; | |
76 | ||
77 | if (info->enable_oc != NULL) { | |
78 | (info->enable_oc)(info, 0); | |
79 | } | |
80 | } | |
81 | ||
82 | clk_disable(clk); | |
3799c401 | 83 | clk_disable(usb_clk); |
3eb0c5f4 BD |
84 | } |
85 | ||
86 | /* ohci_s3c2410_hub_status_data | |
87 | * | |
88 | * update the status data from the hub with anything that | |
89 | * has been detected by our system | |
90 | */ | |
91 | ||
92 | static int | |
93 | ohci_s3c2410_hub_status_data (struct usb_hcd *hcd, char *buf) | |
94 | { | |
95 | struct s3c2410_hcd_info *info = to_s3c2410_info(hcd); | |
96 | struct s3c2410_hcd_port *port; | |
97 | int orig; | |
98 | int portno; | |
99 | ||
100 | orig = ohci_hub_status_data (hcd, buf); | |
101 | ||
102 | if (info == NULL) | |
103 | return orig; | |
104 | ||
105 | port = &info->port[0]; | |
106 | ||
107 | /* mark any changed port as changed */ | |
108 | ||
109 | for (portno = 0; portno < 2; port++, portno++) { | |
110 | if (port->oc_changed == 1 && | |
111 | port->flags & S3C_HCDFLG_USED) { | |
112 | dev_dbg(hcd->self.controller, | |
113 | "oc change on port %d\n", portno); | |
114 | ||
115 | if (orig < 1) | |
116 | orig = 1; | |
117 | ||
118 | buf[0] |= 1<<(portno+1); | |
119 | } | |
120 | } | |
121 | ||
122 | return orig; | |
123 | } | |
124 | ||
125 | /* s3c2410_usb_set_power | |
126 | * | |
127 | * configure the power on a port, by calling the platform device | |
128 | * routine registered with the platform device | |
129 | */ | |
130 | ||
131 | static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info, | |
132 | int port, int to) | |
133 | { | |
134 | if (info == NULL) | |
135 | return; | |
136 | ||
137 | if (info->power_control != NULL) { | |
138 | info->port[port-1].power = to; | |
ba44e7c4 | 139 | (info->power_control)(port-1, to); |
3eb0c5f4 BD |
140 | } |
141 | } | |
142 | ||
143 | /* ohci_s3c2410_hub_control | |
144 | * | |
145 | * look at control requests to the hub, and see if we need | |
146 | * to take any action or over-ride the results from the | |
147 | * request. | |
148 | */ | |
149 | ||
150 | static int ohci_s3c2410_hub_control ( | |
151 | struct usb_hcd *hcd, | |
152 | u16 typeReq, | |
153 | u16 wValue, | |
154 | u16 wIndex, | |
155 | char *buf, | |
156 | u16 wLength) | |
157 | { | |
158 | struct s3c2410_hcd_info *info = to_s3c2410_info(hcd); | |
159 | struct usb_hub_descriptor *desc; | |
160 | int ret = -EINVAL; | |
161 | u32 *data = (u32 *)buf; | |
162 | ||
163 | dev_dbg(hcd->self.controller, | |
164 | "s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
165 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
166 | ||
7f927fcc | 167 | /* if we are only an humble host without any special capabilities |
3eb0c5f4 BD |
168 | * process the request straight away and exit */ |
169 | ||
170 | if (info == NULL) { | |
171 | ret = ohci_hub_control(hcd, typeReq, wValue, | |
172 | wIndex, buf, wLength); | |
173 | goto out; | |
174 | } | |
175 | ||
176 | /* check the request to see if it needs handling */ | |
177 | ||
178 | switch (typeReq) { | |
179 | case SetPortFeature: | |
180 | if (wValue == USB_PORT_FEAT_POWER) { | |
181 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
182 | s3c2410_usb_set_power(info, wIndex, 1); | |
183 | goto out; | |
184 | } | |
185 | break; | |
186 | ||
187 | case ClearPortFeature: | |
188 | switch (wValue) { | |
189 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
190 | dev_dbg(hcd->self.controller, | |
191 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
192 | ||
193 | if (valid_port(wIndex)) { | |
194 | info->port[wIndex-1].oc_changed = 0; | |
195 | info->port[wIndex-1].oc_status = 0; | |
196 | } | |
197 | ||
198 | goto out; | |
199 | ||
200 | case USB_PORT_FEAT_OVER_CURRENT: | |
201 | dev_dbg(hcd->self.controller, | |
202 | "ClearPortFeature: OVER_CURRENT\n"); | |
203 | ||
204 | if (valid_port(wIndex)) { | |
205 | info->port[wIndex-1].oc_status = 0; | |
206 | } | |
207 | ||
208 | goto out; | |
209 | ||
210 | case USB_PORT_FEAT_POWER: | |
211 | dev_dbg(hcd->self.controller, | |
212 | "ClearPortFeature: POWER\n"); | |
213 | ||
214 | if (valid_port(wIndex)) { | |
215 | s3c2410_usb_set_power(info, wIndex, 0); | |
216 | return 0; | |
217 | } | |
218 | } | |
219 | break; | |
220 | } | |
221 | ||
222 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); | |
223 | if (ret) | |
224 | goto out; | |
225 | ||
226 | switch (typeReq) { | |
227 | case GetHubDescriptor: | |
228 | ||
229 | /* update the hub's descriptor */ | |
230 | ||
231 | desc = (struct usb_hub_descriptor *)buf; | |
232 | ||
233 | if (info->power_control == NULL) | |
234 | return ret; | |
235 | ||
236 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
237 | desc->wHubCharacteristics); | |
238 | ||
239 | /* remove the old configurations for power-switching, and | |
240 | * over-current protection, and insert our new configuration | |
241 | */ | |
242 | ||
243 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
244 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); | |
245 | ||
246 | if (info->enable_oc) { | |
247 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
248 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); | |
249 | } | |
250 | ||
251 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
252 | desc->wHubCharacteristics); | |
253 | ||
254 | return ret; | |
255 | ||
256 | case GetPortStatus: | |
257 | /* check port status */ | |
258 | ||
259 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
260 | ||
261 | if (valid_port(wIndex)) { | |
262 | if (info->port[wIndex-1].oc_changed) { | |
263 | *data |= cpu_to_le32(RH_PS_OCIC); | |
264 | } | |
265 | ||
266 | if (info->port[wIndex-1].oc_status) { | |
267 | *data |= cpu_to_le32(RH_PS_POCI); | |
268 | } | |
269 | } | |
270 | } | |
271 | ||
272 | out: | |
273 | return ret; | |
274 | } | |
275 | ||
276 | /* s3c2410_hcd_oc | |
277 | * | |
278 | * handle an over-current report | |
279 | */ | |
280 | ||
281 | static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc) | |
282 | { | |
283 | struct s3c2410_hcd_port *port; | |
284 | struct usb_hcd *hcd; | |
285 | unsigned long flags; | |
286 | int portno; | |
287 | ||
288 | if (info == NULL) | |
289 | return; | |
290 | ||
291 | port = &info->port[0]; | |
292 | hcd = info->hcd; | |
293 | ||
294 | local_irq_save(flags); | |
295 | ||
296 | for (portno = 0; portno < 2; port++, portno++) { | |
297 | if (port_oc & (1<<portno) && | |
298 | port->flags & S3C_HCDFLG_USED) { | |
299 | port->oc_status = 1; | |
300 | port->oc_changed = 1; | |
301 | ||
302 | /* ok, once over-current is detected, | |
303 | the port needs to be powered down */ | |
304 | s3c2410_usb_set_power(info, portno+1, 0); | |
305 | } | |
306 | } | |
307 | ||
308 | local_irq_restore(flags); | |
309 | } | |
310 | ||
311 | /* may be called without controller electrically present */ | |
312 | /* may be called with controller, bus, and devices active */ | |
313 | ||
314 | /* | |
315 | * usb_hcd_s3c2410_remove - shutdown processing for HCD | |
316 | * @dev: USB Host Controller being removed | |
317 | * Context: !in_interrupt() | |
318 | * | |
319 | * Reverses the effect of usb_hcd_3c2410_probe(), first invoking | |
320 | * the HCD's stop() method. It is always called from a thread | |
321 | * context, normally "rmmod", "apmd", or something similar. | |
322 | * | |
323 | */ | |
324 | ||
f096e043 BD |
325 | static void |
326 | usb_hcd_s3c2410_remove (struct usb_hcd *hcd, struct platform_device *dev) | |
3eb0c5f4 BD |
327 | { |
328 | usb_remove_hcd(hcd); | |
329 | s3c2410_stop_hc(dev); | |
330 | iounmap(hcd->regs); | |
331 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
332 | usb_put_hcd(hcd); | |
333 | } | |
334 | ||
335 | /** | |
336 | * usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs | |
337 | * Context: !in_interrupt() | |
338 | * | |
339 | * Allocates basic resources for this USB host controller, and | |
340 | * then invokes the start() method for the HCD associated with it | |
341 | * through the hotplug entry's driver_data. | |
342 | * | |
343 | */ | |
f096e043 BD |
344 | static int usb_hcd_s3c2410_probe (const struct hc_driver *driver, |
345 | struct platform_device *dev) | |
3eb0c5f4 BD |
346 | { |
347 | struct usb_hcd *hcd = NULL; | |
348 | int retval; | |
349 | ||
3eb0c5f4 | 350 | s3c2410_usb_set_power(dev->dev.platform_data, 1, 1); |
ba44e7c4 | 351 | s3c2410_usb_set_power(dev->dev.platform_data, 2, 1); |
3eb0c5f4 BD |
352 | |
353 | hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx"); | |
354 | if (hcd == NULL) | |
355 | return -ENOMEM; | |
356 | ||
357 | hcd->rsrc_start = dev->resource[0].start; | |
358 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
359 | ||
360 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
898eb71c | 361 | dev_err(&dev->dev, "request_mem_region failed\n"); |
3eb0c5f4 | 362 | retval = -EBUSY; |
3799c401 | 363 | goto err_put; |
3eb0c5f4 BD |
364 | } |
365 | ||
3799c401 | 366 | clk = clk_get(&dev->dev, "usb-host"); |
3eb0c5f4 BD |
367 | if (IS_ERR(clk)) { |
368 | dev_err(&dev->dev, "cannot get usb-host clock\n"); | |
369 | retval = -ENOENT; | |
3799c401 BD |
370 | goto err_mem; |
371 | } | |
372 | ||
b2a8e097 | 373 | usb_clk = clk_get(&dev->dev, "usb-bus-host"); |
3799c401 BD |
374 | if (IS_ERR(usb_clk)) { |
375 | dev_err(&dev->dev, "cannot get usb-host clock\n"); | |
376 | retval = -ENOENT; | |
377 | goto err_clk; | |
3eb0c5f4 BD |
378 | } |
379 | ||
3eb0c5f4 BD |
380 | s3c2410_start_hc(dev, hcd); |
381 | ||
382 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
383 | if (!hcd->regs) { | |
384 | dev_err(&dev->dev, "ioremap failed\n"); | |
385 | retval = -ENOMEM; | |
3799c401 | 386 | goto err_ioremap; |
3eb0c5f4 BD |
387 | } |
388 | ||
389 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
390 | ||
d54b5caa | 391 | retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); |
3eb0c5f4 | 392 | if (retval != 0) |
3799c401 | 393 | goto err_ioremap; |
3eb0c5f4 BD |
394 | |
395 | return 0; | |
396 | ||
3799c401 | 397 | err_ioremap: |
3eb0c5f4 BD |
398 | s3c2410_stop_hc(dev); |
399 | iounmap(hcd->regs); | |
3799c401 BD |
400 | clk_put(usb_clk); |
401 | ||
402 | err_clk: | |
3eb0c5f4 BD |
403 | clk_put(clk); |
404 | ||
3799c401 | 405 | err_mem: |
3eb0c5f4 BD |
406 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
407 | ||
3799c401 | 408 | err_put: |
3eb0c5f4 BD |
409 | usb_put_hcd(hcd); |
410 | return retval; | |
411 | } | |
412 | ||
413 | /*-------------------------------------------------------------------------*/ | |
414 | ||
415 | static int | |
416 | ohci_s3c2410_start (struct usb_hcd *hcd) | |
417 | { | |
418 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
419 | int ret; | |
420 | ||
421 | if ((ret = ohci_init(ohci)) < 0) | |
422 | return ret; | |
423 | ||
424 | if ((ret = ohci_run (ohci)) < 0) { | |
425 | err ("can't start %s", hcd->self.bus_name); | |
426 | ohci_stop (hcd); | |
427 | return ret; | |
428 | } | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
433 | ||
434 | static const struct hc_driver ohci_s3c2410_hc_driver = { | |
435 | .description = hcd_name, | |
436 | .product_desc = "S3C24XX OHCI", | |
437 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
438 | ||
439 | /* | |
440 | * generic hardware linkage | |
441 | */ | |
442 | .irq = ohci_irq, | |
443 | .flags = HCD_USB11 | HCD_MEMORY, | |
444 | ||
445 | /* | |
446 | * basic lifecycle operations | |
447 | */ | |
448 | .start = ohci_s3c2410_start, | |
449 | .stop = ohci_stop, | |
dd9048af | 450 | .shutdown = ohci_shutdown, |
3eb0c5f4 BD |
451 | |
452 | /* | |
453 | * managing i/o requests and associated device resources | |
454 | */ | |
455 | .urb_enqueue = ohci_urb_enqueue, | |
456 | .urb_dequeue = ohci_urb_dequeue, | |
457 | .endpoint_disable = ohci_endpoint_disable, | |
458 | ||
459 | /* | |
460 | * scheduling support | |
461 | */ | |
462 | .get_frame_number = ohci_get_frame, | |
463 | ||
464 | /* | |
465 | * root hub support | |
466 | */ | |
467 | .hub_status_data = ohci_s3c2410_hub_status_data, | |
468 | .hub_control = ohci_s3c2410_hub_control, | |
09ca8adb | 469 | .hub_irq_enable = ohci_rhsc_enable, |
8ad7fe16 | 470 | #ifdef CONFIG_PM |
0c0382e3 AS |
471 | .bus_suspend = ohci_bus_suspend, |
472 | .bus_resume = ohci_bus_resume, | |
3eb0c5f4 | 473 | #endif |
9293677a | 474 | .start_port_reset = ohci_start_port_reset, |
3eb0c5f4 BD |
475 | }; |
476 | ||
477 | /* device driver */ | |
478 | ||
3ae5eaec | 479 | static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) |
3eb0c5f4 | 480 | { |
3eb0c5f4 BD |
481 | return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev); |
482 | } | |
483 | ||
3ae5eaec | 484 | static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev) |
3eb0c5f4 | 485 | { |
3ae5eaec | 486 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
3eb0c5f4 BD |
487 | |
488 | usb_hcd_s3c2410_remove(hcd, pdev); | |
489 | return 0; | |
490 | } | |
491 | ||
3ae5eaec | 492 | static struct platform_driver ohci_hcd_s3c2410_driver = { |
3eb0c5f4 BD |
493 | .probe = ohci_hcd_s3c2410_drv_probe, |
494 | .remove = ohci_hcd_s3c2410_drv_remove, | |
dd9048af | 495 | .shutdown = usb_hcd_platform_shutdown, |
3eb0c5f4 BD |
496 | /*.suspend = ohci_hcd_s3c2410_drv_suspend, */ |
497 | /*.resume = ohci_hcd_s3c2410_drv_resume, */ | |
3ae5eaec RK |
498 | .driver = { |
499 | .owner = THIS_MODULE, | |
500 | .name = "s3c2410-ohci", | |
501 | }, | |
3eb0c5f4 BD |
502 | }; |
503 | ||
f4fce61d | 504 | MODULE_ALIAS("platform:s3c2410-ohci"); |