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1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * OHCI HCD (Host Controller Driver) for USB.
4 *
5 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
6 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
7 * (C) Copyright 2002 Hewlett-Packard Company
8 *
9 * USB Bus Glue for Samsung S3C2410
10 *
11 * Written by Christopher Hoover <ch@hpl.hp.com>
12 * Based on fragments of previous driver by Russell King et al.
13 *
14 * Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c
15 * by Ben Dooks, <ben@simtec.co.uk>
16 * Copyright (C) 2004 Simtec Electronics
17 *
18 * Thanks to basprog@mail.ru for updates to newer kernels
19 *
20 * This file is licenced under the GPL.
21*/
22
23#include <linux/clk.h>
24#include <linux/io.h>
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/platform_device.h>
28#include <linux/platform_data/usb-ohci-s3c2410.h>
29#include <linux/usb.h>
30#include <linux/usb/hcd.h>
31
32#include "ohci.h"
33
34
35#define valid_port(idx) ((idx) == 1 || (idx) == 2)
36
37/* clock device associated with the hcd */
38
39
40#define DRIVER_DESC "OHCI S3C2410 driver"
41
42static struct clk *clk;
43static struct clk *usb_clk;
44
45static struct hc_driver __read_mostly ohci_s3c2410_hc_driver;
46
47/* forward definitions */
48
49static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);
50
51/* conversion functions */
52
53static struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd)
54{
55 return dev_get_platdata(hcd->self.controller);
56}
57
58static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd)
59{
60 struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
61
62 dev_dbg(&dev->dev, "s3c2410_start_hc:\n");
63
64 clk_prepare_enable(usb_clk);
65 mdelay(2); /* let the bus clock stabilise */
66
67 clk_prepare_enable(clk);
68
69 if (info != NULL) {
70 info->hcd = hcd;
71 info->report_oc = s3c2410_hcd_oc;
72
73 if (info->enable_oc != NULL)
74 (info->enable_oc)(info, 1);
75 }
76}
77
78static void s3c2410_stop_hc(struct platform_device *dev)
79{
80 struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
81
82 dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");
83
84 if (info != NULL) {
85 info->report_oc = NULL;
86 info->hcd = NULL;
87
88 if (info->enable_oc != NULL)
89 (info->enable_oc)(info, 0);
90 }
91
92 clk_disable_unprepare(clk);
93 clk_disable_unprepare(usb_clk);
94}
95
96/* ohci_s3c2410_hub_status_data
97 *
98 * update the status data from the hub with anything that
99 * has been detected by our system
100*/
101
102static int
103ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf)
104{
105 struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
106 struct s3c2410_hcd_port *port;
107 int orig;
108 int portno;
109
110 orig = ohci_hub_status_data(hcd, buf);
111
112 if (info == NULL)
113 return orig;
114
115 port = &info->port[0];
116
117 /* mark any changed port as changed */
118
119 for (portno = 0; portno < 2; port++, portno++) {
120 if (port->oc_changed == 1 &&
121 port->flags & S3C_HCDFLG_USED) {
122 dev_dbg(hcd->self.controller,
123 "oc change on port %d\n", portno);
124
125 if (orig < 1)
126 orig = 1;
127
128 buf[0] |= 1<<(portno+1);
129 }
130 }
131
132 return orig;
133}
134
135/* s3c2410_usb_set_power
136 *
137 * configure the power on a port, by calling the platform device
138 * routine registered with the platform device
139*/
140
141static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,
142 int port, int to)
143{
144 if (info == NULL)
145 return;
146
147 if (info->power_control != NULL) {
148 info->port[port-1].power = to;
149 (info->power_control)(port-1, to);
150 }
151}
152
153/* ohci_s3c2410_hub_control
154 *
155 * look at control requests to the hub, and see if we need
156 * to take any action or over-ride the results from the
157 * request.
158*/
159
160static int ohci_s3c2410_hub_control(
161 struct usb_hcd *hcd,
162 u16 typeReq,
163 u16 wValue,
164 u16 wIndex,
165 char *buf,
166 u16 wLength)
167{
168 struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
169 struct usb_hub_descriptor *desc;
170 int ret = -EINVAL;
171 u32 *data = (u32 *)buf;
172
173 dev_dbg(hcd->self.controller,
174 "s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
175 hcd, typeReq, wValue, wIndex, buf, wLength);
176
177 /* if we are only an humble host without any special capabilities
178 * process the request straight away and exit */
179
180 if (info == NULL) {
181 ret = ohci_hub_control(hcd, typeReq, wValue,
182 wIndex, buf, wLength);
183 goto out;
184 }
185
186 /* check the request to see if it needs handling */
187
188 switch (typeReq) {
189 case SetPortFeature:
190 if (wValue == USB_PORT_FEAT_POWER) {
191 dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
192 s3c2410_usb_set_power(info, wIndex, 1);
193 goto out;
194 }
195 break;
196
197 case ClearPortFeature:
198 switch (wValue) {
199 case USB_PORT_FEAT_C_OVER_CURRENT:
200 dev_dbg(hcd->self.controller,
201 "ClearPortFeature: C_OVER_CURRENT\n");
202
203 if (valid_port(wIndex)) {
204 info->port[wIndex-1].oc_changed = 0;
205 info->port[wIndex-1].oc_status = 0;
206 }
207
208 goto out;
209
210 case USB_PORT_FEAT_OVER_CURRENT:
211 dev_dbg(hcd->self.controller,
212 "ClearPortFeature: OVER_CURRENT\n");
213
214 if (valid_port(wIndex))
215 info->port[wIndex-1].oc_status = 0;
216
217 goto out;
218
219 case USB_PORT_FEAT_POWER:
220 dev_dbg(hcd->self.controller,
221 "ClearPortFeature: POWER\n");
222
223 if (valid_port(wIndex)) {
224 s3c2410_usb_set_power(info, wIndex, 0);
225 return 0;
226 }
227 }
228 break;
229 }
230
231 ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
232 if (ret)
233 goto out;
234
235 switch (typeReq) {
236 case GetHubDescriptor:
237
238 /* update the hub's descriptor */
239
240 desc = (struct usb_hub_descriptor *)buf;
241
242 if (info->power_control == NULL)
243 return ret;
244
245 dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
246 desc->wHubCharacteristics);
247
248 /* remove the old configurations for power-switching, and
249 * over-current protection, and insert our new configuration
250 */
251
252 desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
253 desc->wHubCharacteristics |= cpu_to_le16(
254 HUB_CHAR_INDV_PORT_LPSM);
255
256 if (info->enable_oc) {
257 desc->wHubCharacteristics &= ~cpu_to_le16(
258 HUB_CHAR_OCPM);
259 desc->wHubCharacteristics |= cpu_to_le16(
260 HUB_CHAR_INDV_PORT_OCPM);
261 }
262
263 dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
264 desc->wHubCharacteristics);
265
266 return ret;
267
268 case GetPortStatus:
269 /* check port status */
270
271 dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
272
273 if (valid_port(wIndex)) {
274 if (info->port[wIndex-1].oc_changed)
275 *data |= cpu_to_le32(RH_PS_OCIC);
276
277 if (info->port[wIndex-1].oc_status)
278 *data |= cpu_to_le32(RH_PS_POCI);
279 }
280 }
281
282 out:
283 return ret;
284}
285
286/* s3c2410_hcd_oc
287 *
288 * handle an over-current report
289*/
290
291static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
292{
293 struct s3c2410_hcd_port *port;
294 unsigned long flags;
295 int portno;
296
297 if (info == NULL)
298 return;
299
300 port = &info->port[0];
301
302 local_irq_save(flags);
303
304 for (portno = 0; portno < 2; port++, portno++) {
305 if (port_oc & (1<<portno) &&
306 port->flags & S3C_HCDFLG_USED) {
307 port->oc_status = 1;
308 port->oc_changed = 1;
309
310 /* ok, once over-current is detected,
311 the port needs to be powered down */
312 s3c2410_usb_set_power(info, portno+1, 0);
313 }
314 }
315
316 local_irq_restore(flags);
317}
318
319/* may be called without controller electrically present */
320/* may be called with controller, bus, and devices active */
321
322/*
323 * ohci_hcd_s3c2410_remove - shutdown processing for HCD
324 * @dev: USB Host Controller being removed
325 *
326 * Context: task context, might sleep
327 *
328 * Reverses the effect of ohci_hcd_3c2410_probe(), first invoking
329 * the HCD's stop() method. It is always called from a thread
330 * context, normally "rmmod", "apmd", or something similar.
331 */
332static void
333ohci_hcd_s3c2410_remove(struct platform_device *dev)
334{
335 struct usb_hcd *hcd = platform_get_drvdata(dev);
336
337 usb_remove_hcd(hcd);
338 s3c2410_stop_hc(dev);
339 usb_put_hcd(hcd);
340}
341
342/*
343 * ohci_hcd_s3c2410_probe - initialize S3C2410-based HCDs
344 * @dev: USB Host Controller to be probed
345 *
346 * Context: task context, might sleep
347 *
348 * Allocates basic resources for this USB host controller, and
349 * then invokes the start() method for the HCD associated with it
350 * through the hotplug entry's driver_data.
351 */
352static int ohci_hcd_s3c2410_probe(struct platform_device *dev)
353{
354 struct usb_hcd *hcd = NULL;
355 struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
356 int retval, irq;
357
358 s3c2410_usb_set_power(info, 1, 1);
359 s3c2410_usb_set_power(info, 2, 1);
360
361 hcd = usb_create_hcd(&ohci_s3c2410_hc_driver, &dev->dev, "s3c24xx");
362 if (hcd == NULL)
363 return -ENOMEM;
364
365 hcd->rsrc_start = dev->resource[0].start;
366 hcd->rsrc_len = resource_size(&dev->resource[0]);
367
368 hcd->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
369 if (IS_ERR(hcd->regs)) {
370 retval = PTR_ERR(hcd->regs);
371 goto err_put;
372 }
373
374 clk = devm_clk_get(&dev->dev, "usb-host");
375 if (IS_ERR(clk)) {
376 dev_err(&dev->dev, "cannot get usb-host clock\n");
377 retval = PTR_ERR(clk);
378 goto err_put;
379 }
380
381 usb_clk = devm_clk_get(&dev->dev, "usb-bus-host");
382 if (IS_ERR(usb_clk)) {
383 dev_err(&dev->dev, "cannot get usb-bus-host clock\n");
384 retval = PTR_ERR(usb_clk);
385 goto err_put;
386 }
387
388 irq = platform_get_irq(dev, 0);
389 if (irq < 0) {
390 retval = irq;
391 goto err_put;
392 }
393
394 s3c2410_start_hc(dev, hcd);
395
396 retval = usb_add_hcd(hcd, irq, 0);
397 if (retval != 0)
398 goto err_ioremap;
399
400 device_wakeup_enable(hcd->self.controller);
401 return 0;
402
403 err_ioremap:
404 s3c2410_stop_hc(dev);
405
406 err_put:
407 usb_put_hcd(hcd);
408 return retval;
409}
410
411/*-------------------------------------------------------------------------*/
412
413#ifdef CONFIG_PM
414static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)
415{
416 struct usb_hcd *hcd = dev_get_drvdata(dev);
417 struct platform_device *pdev = to_platform_device(dev);
418 bool do_wakeup = device_may_wakeup(dev);
419 int rc = 0;
420
421 rc = ohci_suspend(hcd, do_wakeup);
422 if (rc)
423 return rc;
424
425 s3c2410_stop_hc(pdev);
426
427 return rc;
428}
429
430static int ohci_hcd_s3c2410_drv_resume(struct device *dev)
431{
432 struct usb_hcd *hcd = dev_get_drvdata(dev);
433 struct platform_device *pdev = to_platform_device(dev);
434
435 s3c2410_start_hc(pdev, hcd);
436
437 ohci_resume(hcd, false);
438
439 return 0;
440}
441#else
442#define ohci_hcd_s3c2410_drv_suspend NULL
443#define ohci_hcd_s3c2410_drv_resume NULL
444#endif
445
446static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {
447 .suspend = ohci_hcd_s3c2410_drv_suspend,
448 .resume = ohci_hcd_s3c2410_drv_resume,
449};
450
451static const struct of_device_id ohci_hcd_s3c2410_dt_ids[] = {
452 { .compatible = "samsung,s3c2410-ohci" },
453 { /* sentinel */ }
454};
455
456MODULE_DEVICE_TABLE(of, ohci_hcd_s3c2410_dt_ids);
457
458static struct platform_driver ohci_hcd_s3c2410_driver = {
459 .probe = ohci_hcd_s3c2410_probe,
460 .remove_new = ohci_hcd_s3c2410_remove,
461 .shutdown = usb_hcd_platform_shutdown,
462 .driver = {
463 .name = "s3c2410-ohci",
464 .pm = &ohci_hcd_s3c2410_pm_ops,
465 .of_match_table = ohci_hcd_s3c2410_dt_ids,
466 },
467};
468
469static int __init ohci_s3c2410_init(void)
470{
471 if (usb_disabled())
472 return -ENODEV;
473
474 ohci_init_driver(&ohci_s3c2410_hc_driver, NULL);
475
476 /*
477 * The Samsung HW has some unusual quirks, which require
478 * Sumsung-specific workarounds. We override certain hc_driver
479 * functions here to achieve that. We explicitly do not enhance
480 * ohci_driver_overrides to allow this more easily, since this
481 * is an unusual case, and we don't want to encourage others to
482 * override these functions by making it too easy.
483 */
484
485 ohci_s3c2410_hc_driver.hub_status_data = ohci_s3c2410_hub_status_data;
486 ohci_s3c2410_hc_driver.hub_control = ohci_s3c2410_hub_control;
487
488 return platform_driver_register(&ohci_hcd_s3c2410_driver);
489}
490module_init(ohci_s3c2410_init);
491
492static void __exit ohci_s3c2410_cleanup(void)
493{
494 platform_driver_unregister(&ohci_hcd_s3c2410_driver);
495}
496module_exit(ohci_s3c2410_cleanup);
497
498MODULE_DESCRIPTION(DRIVER_DESC);
499MODULE_LICENSE("GPL");
500MODULE_ALIAS("platform:s3c2410-ohci");
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 Russell 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 <linux/platform_device.h>
23#include <linux/clk.h>
24#include <plat/usb-control.h>
25
26#define valid_port(idx) ((idx) == 1 || (idx) == 2)
27
28/* clock device associated with the hcd */
29
30static struct clk *clk;
31static struct clk *usb_clk;
32
33/* forward definitions */
34
35static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);
36
37/* conversion functions */
38
39static struct 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
50 clk_enable(usb_clk);
51 mdelay(2); /* let the bus clock stabilise */
52
53 clk_enable(clk);
54
55 if (info != NULL) {
56 info->hcd = hcd;
57 info->report_oc = s3c2410_hcd_oc;
58
59 if (info->enable_oc != NULL)
60 (info->enable_oc)(info, 1);
61 }
62}
63
64static void s3c2410_stop_hc(struct platform_device *dev)
65{
66 struct s3c2410_hcd_info *info = dev->dev.platform_data;
67
68 dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");
69
70 if (info != NULL) {
71 info->report_oc = NULL;
72 info->hcd = NULL;
73
74 if (info->enable_oc != NULL)
75 (info->enable_oc)(info, 0);
76 }
77
78 clk_disable(clk);
79 clk_disable(usb_clk);
80}
81
82/* ohci_s3c2410_hub_status_data
83 *
84 * update the status data from the hub with anything that
85 * has been detected by our system
86*/
87
88static int
89ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf)
90{
91 struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
92 struct s3c2410_hcd_port *port;
93 int orig;
94 int portno;
95
96 orig = ohci_hub_status_data(hcd, buf);
97
98 if (info == NULL)
99 return orig;
100
101 port = &info->port[0];
102
103 /* mark any changed port as changed */
104
105 for (portno = 0; portno < 2; port++, portno++) {
106 if (port->oc_changed == 1 &&
107 port->flags & S3C_HCDFLG_USED) {
108 dev_dbg(hcd->self.controller,
109 "oc change on port %d\n", portno);
110
111 if (orig < 1)
112 orig = 1;
113
114 buf[0] |= 1<<(portno+1);
115 }
116 }
117
118 return orig;
119}
120
121/* s3c2410_usb_set_power
122 *
123 * configure the power on a port, by calling the platform device
124 * routine registered with the platform device
125*/
126
127static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,
128 int port, int to)
129{
130 if (info == NULL)
131 return;
132
133 if (info->power_control != NULL) {
134 info->port[port-1].power = to;
135 (info->power_control)(port-1, to);
136 }
137}
138
139/* ohci_s3c2410_hub_control
140 *
141 * look at control requests to the hub, and see if we need
142 * to take any action or over-ride the results from the
143 * request.
144*/
145
146static int ohci_s3c2410_hub_control(
147 struct usb_hcd *hcd,
148 u16 typeReq,
149 u16 wValue,
150 u16 wIndex,
151 char *buf,
152 u16 wLength)
153{
154 struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
155 struct usb_hub_descriptor *desc;
156 int ret = -EINVAL;
157 u32 *data = (u32 *)buf;
158
159 dev_dbg(hcd->self.controller,
160 "s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
161 hcd, typeReq, wValue, wIndex, buf, wLength);
162
163 /* if we are only an humble host without any special capabilities
164 * process the request straight away and exit */
165
166 if (info == NULL) {
167 ret = ohci_hub_control(hcd, typeReq, wValue,
168 wIndex, buf, wLength);
169 goto out;
170 }
171
172 /* check the request to see if it needs handling */
173
174 switch (typeReq) {
175 case SetPortFeature:
176 if (wValue == USB_PORT_FEAT_POWER) {
177 dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
178 s3c2410_usb_set_power(info, wIndex, 1);
179 goto out;
180 }
181 break;
182
183 case ClearPortFeature:
184 switch (wValue) {
185 case USB_PORT_FEAT_C_OVER_CURRENT:
186 dev_dbg(hcd->self.controller,
187 "ClearPortFeature: C_OVER_CURRENT\n");
188
189 if (valid_port(wIndex)) {
190 info->port[wIndex-1].oc_changed = 0;
191 info->port[wIndex-1].oc_status = 0;
192 }
193
194 goto out;
195
196 case USB_PORT_FEAT_OVER_CURRENT:
197 dev_dbg(hcd->self.controller,
198 "ClearPortFeature: OVER_CURRENT\n");
199
200 if (valid_port(wIndex))
201 info->port[wIndex-1].oc_status = 0;
202
203 goto out;
204
205 case USB_PORT_FEAT_POWER:
206 dev_dbg(hcd->self.controller,
207 "ClearPortFeature: POWER\n");
208
209 if (valid_port(wIndex)) {
210 s3c2410_usb_set_power(info, wIndex, 0);
211 return 0;
212 }
213 }
214 break;
215 }
216
217 ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
218 if (ret)
219 goto out;
220
221 switch (typeReq) {
222 case GetHubDescriptor:
223
224 /* update the hub's descriptor */
225
226 desc = (struct usb_hub_descriptor *)buf;
227
228 if (info->power_control == NULL)
229 return ret;
230
231 dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
232 desc->wHubCharacteristics);
233
234 /* remove the old configurations for power-switching, and
235 * over-current protection, and insert our new configuration
236 */
237
238 desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
239 desc->wHubCharacteristics |= cpu_to_le16(0x0001);
240
241 if (info->enable_oc) {
242 desc->wHubCharacteristics &= ~cpu_to_le16(
243 HUB_CHAR_OCPM);
244 desc->wHubCharacteristics |= cpu_to_le16(
245 0x0008 |
246 0x0001);
247 }
248
249 dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
250 desc->wHubCharacteristics);
251
252 return ret;
253
254 case GetPortStatus:
255 /* check port status */
256
257 dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
258
259 if (valid_port(wIndex)) {
260 if (info->port[wIndex-1].oc_changed)
261 *data |= cpu_to_le32(RH_PS_OCIC);
262
263 if (info->port[wIndex-1].oc_status)
264 *data |= cpu_to_le32(RH_PS_POCI);
265 }
266 }
267
268 out:
269 return ret;
270}
271
272/* s3c2410_hcd_oc
273 *
274 * handle an over-current report
275*/
276
277static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
278{
279 struct s3c2410_hcd_port *port;
280 struct usb_hcd *hcd;
281 unsigned long flags;
282 int portno;
283
284 if (info == NULL)
285 return;
286
287 port = &info->port[0];
288 hcd = info->hcd;
289
290 local_irq_save(flags);
291
292 for (portno = 0; portno < 2; port++, portno++) {
293 if (port_oc & (1<<portno) &&
294 port->flags & S3C_HCDFLG_USED) {
295 port->oc_status = 1;
296 port->oc_changed = 1;
297
298 /* ok, once over-current is detected,
299 the port needs to be powered down */
300 s3c2410_usb_set_power(info, portno+1, 0);
301 }
302 }
303
304 local_irq_restore(flags);
305}
306
307/* may be called without controller electrically present */
308/* may be called with controller, bus, and devices active */
309
310/*
311 * usb_hcd_s3c2410_remove - shutdown processing for HCD
312 * @dev: USB Host Controller being removed
313 * Context: !in_interrupt()
314 *
315 * Reverses the effect of usb_hcd_3c2410_probe(), first invoking
316 * the HCD's stop() method. It is always called from a thread
317 * context, normally "rmmod", "apmd", or something similar.
318 *
319*/
320
321static void
322usb_hcd_s3c2410_remove(struct usb_hcd *hcd, struct platform_device *dev)
323{
324 usb_remove_hcd(hcd);
325 s3c2410_stop_hc(dev);
326 iounmap(hcd->regs);
327 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
328 usb_put_hcd(hcd);
329}
330
331/**
332 * usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs
333 * Context: !in_interrupt()
334 *
335 * Allocates basic resources for this USB host controller, and
336 * then invokes the start() method for the HCD associated with it
337 * through the hotplug entry's driver_data.
338 *
339 */
340static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
341 struct platform_device *dev)
342{
343 struct usb_hcd *hcd = NULL;
344 int retval;
345
346 s3c2410_usb_set_power(dev->dev.platform_data, 1, 1);
347 s3c2410_usb_set_power(dev->dev.platform_data, 2, 1);
348
349 hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx");
350 if (hcd == NULL)
351 return -ENOMEM;
352
353 hcd->rsrc_start = dev->resource[0].start;
354 hcd->rsrc_len = resource_size(&dev->resource[0]);
355
356 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
357 dev_err(&dev->dev, "request_mem_region failed\n");
358 retval = -EBUSY;
359 goto err_put;
360 }
361
362 clk = clk_get(&dev->dev, "usb-host");
363 if (IS_ERR(clk)) {
364 dev_err(&dev->dev, "cannot get usb-host clock\n");
365 retval = PTR_ERR(clk);
366 goto err_mem;
367 }
368
369 usb_clk = clk_get(&dev->dev, "usb-bus-host");
370 if (IS_ERR(usb_clk)) {
371 dev_err(&dev->dev, "cannot get usb-bus-host clock\n");
372 retval = PTR_ERR(usb_clk);
373 goto err_clk;
374 }
375
376 s3c2410_start_hc(dev, hcd);
377
378 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
379 if (!hcd->regs) {
380 dev_err(&dev->dev, "ioremap failed\n");
381 retval = -ENOMEM;
382 goto err_ioremap;
383 }
384
385 ohci_hcd_init(hcd_to_ohci(hcd));
386
387 retval = usb_add_hcd(hcd, dev->resource[1].start, 0);
388 if (retval != 0)
389 goto err_ioremap;
390
391 return 0;
392
393 err_ioremap:
394 s3c2410_stop_hc(dev);
395 iounmap(hcd->regs);
396 clk_put(usb_clk);
397
398 err_clk:
399 clk_put(clk);
400
401 err_mem:
402 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
403
404 err_put:
405 usb_put_hcd(hcd);
406 return retval;
407}
408
409/*-------------------------------------------------------------------------*/
410
411static int
412ohci_s3c2410_start(struct usb_hcd *hcd)
413{
414 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
415 int ret;
416
417 ret = ohci_init(ohci);
418 if (ret < 0)
419 return ret;
420
421 ret = ohci_run(ohci);
422 if (ret < 0) {
423 dev_err(hcd->self.controller, "can't start %s\n",
424 hcd->self.bus_name);
425 ohci_stop(hcd);
426 return ret;
427 }
428
429 return 0;
430}
431
432
433static const struct hc_driver ohci_s3c2410_hc_driver = {
434 .description = hcd_name,
435 .product_desc = "S3C24XX OHCI",
436 .hcd_priv_size = sizeof(struct ohci_hcd),
437
438 /*
439 * generic hardware linkage
440 */
441 .irq = ohci_irq,
442 .flags = HCD_USB11 | HCD_MEMORY,
443
444 /*
445 * basic lifecycle operations
446 */
447 .start = ohci_s3c2410_start,
448 .stop = ohci_stop,
449 .shutdown = ohci_shutdown,
450
451 /*
452 * managing i/o requests and associated device resources
453 */
454 .urb_enqueue = ohci_urb_enqueue,
455 .urb_dequeue = ohci_urb_dequeue,
456 .endpoint_disable = ohci_endpoint_disable,
457
458 /*
459 * scheduling support
460 */
461 .get_frame_number = ohci_get_frame,
462
463 /*
464 * root hub support
465 */
466 .hub_status_data = ohci_s3c2410_hub_status_data,
467 .hub_control = ohci_s3c2410_hub_control,
468#ifdef CONFIG_PM
469 .bus_suspend = ohci_bus_suspend,
470 .bus_resume = ohci_bus_resume,
471#endif
472 .start_port_reset = ohci_start_port_reset,
473};
474
475/* device driver */
476
477static int __devinit ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev)
478{
479 return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev);
480}
481
482static int __devexit ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
483{
484 struct usb_hcd *hcd = platform_get_drvdata(pdev);
485
486 usb_hcd_s3c2410_remove(hcd, pdev);
487 return 0;
488}
489
490#ifdef CONFIG_PM
491static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)
492{
493 struct usb_hcd *hcd = dev_get_drvdata(dev);
494 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
495 struct platform_device *pdev = to_platform_device(dev);
496 unsigned long flags;
497 int rc = 0;
498
499 /*
500 * Root hub was already suspended. Disable irq emission and
501 * mark HW unaccessible, bail out if RH has been resumed. Use
502 * the spinlock to properly synchronize with possible pending
503 * RH suspend or resume activity.
504 */
505 spin_lock_irqsave(&ohci->lock, flags);
506 if (ohci->rh_state != OHCI_RH_SUSPENDED) {
507 rc = -EINVAL;
508 goto bail;
509 }
510
511 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
512
513 s3c2410_stop_hc(pdev);
514bail:
515 spin_unlock_irqrestore(&ohci->lock, flags);
516
517 return rc;
518}
519
520static int ohci_hcd_s3c2410_drv_resume(struct device *dev)
521{
522 struct usb_hcd *hcd = dev_get_drvdata(dev);
523 struct platform_device *pdev = to_platform_device(dev);
524
525 s3c2410_start_hc(pdev, hcd);
526
527 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
528 ohci_finish_controller_resume(hcd);
529
530 return 0;
531}
532#else
533#define ohci_hcd_s3c2410_drv_suspend NULL
534#define ohci_hcd_s3c2410_drv_resume NULL
535#endif
536
537static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {
538 .suspend = ohci_hcd_s3c2410_drv_suspend,
539 .resume = ohci_hcd_s3c2410_drv_resume,
540};
541
542static struct platform_driver ohci_hcd_s3c2410_driver = {
543 .probe = ohci_hcd_s3c2410_drv_probe,
544 .remove = __devexit_p(ohci_hcd_s3c2410_drv_remove),
545 .shutdown = usb_hcd_platform_shutdown,
546 .driver = {
547 .owner = THIS_MODULE,
548 .name = "s3c2410-ohci",
549 .pm = &ohci_hcd_s3c2410_pm_ops,
550 },
551};
552
553MODULE_ALIAS("platform:s3c2410-ohci");