aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/ohci-s3c2410.c
diff options
context:
space:
mode:
authorBen Dooks <ben-linux-usb@fluff.org>2005-07-29 15:18:03 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-29 16:12:53 -0400
commit3eb0c5f4b539873ca88f8597db6a49e83ddfd7e2 (patch)
tree22b31e5bc049df465670ab03c44da8a4022a9c92 /drivers/usb/host/ohci-s3c2410.c
parentf29080976d109b6c08e42be8a1888f338785c502 (diff)
[PATCH] USB: add S3C24XX USB Host driver support
USB (OHCI) Host driver for S3C2410/S3C2440 based systems Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/usb/host/ohci-s3c2410.c')
-rw-r--r--drivers/usb/host/ohci-s3c2410.c496
1 files changed, 496 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
new file mode 100644
index 000000000000..e9401662503c
--- /dev/null
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -0,0 +1,496 @@
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
31static struct clk *clk;
32
33/* forward definitions */
34
35static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);
36
37/* conversion functions */
38
39struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd)
40{
41 return hcd->self.controller->platform_data;
42}
43
44static 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
61static 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
85static int
86ohci_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
124static 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
143static 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
274static 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
318void 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 */
336int 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
399static int
400ohci_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
418static 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
461static 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
467static 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
476static 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
485static int __init ohci_hcd_s3c2410_init (void)
486{
487 return driver_register(&ohci_hcd_s3c2410_driver);
488}
489
490static void __exit ohci_hcd_s3c2410_cleanup (void)
491{
492 driver_unregister(&ohci_hcd_s3c2410_driver);
493}
494
495module_init (ohci_hcd_s3c2410_init);
496module_exit (ohci_hcd_s3c2410_cleanup);