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usb: gadget: renesas_usbhs: remove usbhs_sys_hispeed_ctrl()
[deliverable/linux.git] / drivers / usb / renesas_usbhs / common.c
CommitLineData
f1407d5c
KM		 1/*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17#include <linux/io.h>
18#include <linux/module.h>
19#include <linux/pm_runtime.h>
20#include <linux/slab.h>
21#include <linux/sysfs.h>
22#include "./common.h"
23
233f519d
KM		 24/*
25 * image of renesas_usbhs
26 *
27 * ex) gadget case
28
29 * mod.c
30 * mod_gadget.c
31 * mod_host.c pipe.c fifo.c
32 *
33 * +-------+ +-----------+
34 * | pipe0 |------>| fifo pio |
35 * +------------+ +-------+ +-----------+
36 * | mod_gadget |=====> | pipe1 |--+
37 * +------------+ +-------+ | +-----------+
38 * | pipe2 | | +-| fifo dma0 |
39 * +------------+ +-------+ | | +-----------+
40 * | mod_host | | pipe3 |<-|--+
41 * +------------+ +-------+ | +-----------+
42 * | .... | +--->| fifo dma1 |
43 * | .... | +-----------+
44 */
45
46
b002ff6e
KM		 47#define USBHSF_RUNTIME_PWCTRL (1 << 0)
48
49/* status */
50#define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
51#define usbhsc_flags_set(p, b) ((p)->flags |= (b))
52#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
53#define usbhsc_flags_has(p, b) ((p)->flags & (b))
54
f1407d5c
KM		 55/*
56 * platform call back
57 *
58 * renesas usb support platform callback function.
59 * Below macro call it.
60 * if platform doesn't have callback, it return 0 (no error)
61 */
62#define usbhs_platform_call(priv, func, args...)\
63 (!(priv) ? -ENODEV : \
48298206
KM		 64 !((priv)->pfunc.func) ? 0 : \
65 (priv)->pfunc.func(args))
f1407d5c
KM		 66
67/*
68 * common functions
69 */
70u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
71{
72 return ioread16(priv->base + reg);
73}
74
75void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
76{
77 iowrite16(data, priv->base + reg);
78}
79
80void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
81{
82 u16 val = usbhs_read(priv, reg);
83
84 val &= ~mask;
85 val |= data & mask;
86
87 usbhs_write(priv, reg, val);
88}
89
206dcc2c
KM		 90struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
91{
92 return dev_get_drvdata(&pdev->dev);
93}
94
f1407d5c
KM		 95/*
96 * syscfg functions
97 */
98void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
99{
100 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
101}
102
f1407d5c
KM		 103void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable)
104{
105 usbhs_bset(priv, SYSCFG, USBE, enable ? USBE : 0);
106}
107
108void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
109{
2288e109
KM		 110 u16 mask = DCFM | DRPD | DPRPU | HSE;
111 u16 val = DCFM | DRPD | HSE;
f427eb64
KM		 112 int has_otg = usbhs_get_dparam(priv, has_otg);
113
114 if (has_otg)
115 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
f1407d5c
KM		 116
117 /*
118 * if enable
119 *
120 * - select Host mode
121 * - D+ Line/D- Line Pull-down
122 */
123 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
124}
125
126void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
127{
2288e109
KM		 128 u16 mask = DCFM | DRPD | DPRPU | HSE;
129 u16 val = DPRPU | HSE;
f1407d5c
KM		 130
131 /*
132 * if enable
133 *
134 * - select Function mode
135 * - D+ Line Pull-up
136 */
137 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
138}
139
140/*
141 * frame functions
142 */
143int usbhs_frame_get_num(struct usbhs_priv *priv)
144{
145 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
146}
147
ef8bedb9
KM		 148/*
149 * usb request functions
150 */
151void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
152{
153 u16 val;
154
155 val = usbhs_read(priv, USBREQ);
156 req->bRequest = (val >> 8) & 0xFF;
157 req->bRequestType = (val >> 0) & 0xFF;
158
159 req->wValue = usbhs_read(priv, USBVAL);
160 req->wIndex = usbhs_read(priv, USBINDX);
161 req->wLength = usbhs_read(priv, USBLENG);
162}
163
164void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
165{
166 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
167 usbhs_write(priv, USBVAL, req->wValue);
168 usbhs_write(priv, USBINDX, req->wIndex);
169 usbhs_write(priv, USBLENG, req->wLength);
170
171 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
172}
173
258485d9
KM		 174/*
175 * bus/vbus functions
176 */
177void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
178{
a9be4a45
KM		 179 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
180
181 if (status != USBRST) {
182 struct device *dev = usbhs_priv_to_dev(priv);
183 dev_err(dev, "usbhs should be reset\n");
184 }
185
258485d9
KM		 186 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
187}
188
189void usbhs_bus_send_reset(struct usbhs_priv *priv)
190{
191 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
192}
193
75587f52
KM		 194int usbhs_bus_get_speed(struct usbhs_priv *priv)
195{
196 u16 dvstctr = usbhs_read(priv, DVSTCTR);
197
198 switch (RHST & dvstctr) {
199 case RHST_LOW_SPEED:
200 return USB_SPEED_LOW;
201 case RHST_FULL_SPEED:
202 return USB_SPEED_FULL;
203 case RHST_HIGH_SPEED:
204 return USB_SPEED_HIGH;
205 }
206
207 return USB_SPEED_UNKNOWN;
208}
209
258485d9
KM		 210int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
211{
212 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
213
214 return usbhs_platform_call(priv, set_vbus, pdev, enable);
215}
216
217static void usbhsc_bus_init(struct usbhs_priv *priv)
218{
219 usbhs_write(priv, DVSTCTR, 0);
220
221 usbhs_vbus_ctrl(priv, 0);
222}
223
eb05191f
KM		 224/*
225 * device configuration
226 */
227int usbhs_set_device_speed(struct usbhs_priv *priv, int devnum,
228 u16 upphub, u16 hubport, u16 speed)
229{
230 struct device *dev = usbhs_priv_to_dev(priv);
231 u16 usbspd = 0;
232 u32 reg = DEVADD0 + (2 * devnum);
233
234 if (devnum > 10) {
235 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
236 return -EIO;
237 }
238
239 if (upphub > 0xA) {
240 dev_err(dev, "unsupported hub number %d\n", upphub);
241 return -EIO;
242 }
243
244 switch (speed) {
245 case USB_SPEED_LOW:
246 usbspd = USBSPD_SPEED_LOW;
247 break;
248 case USB_SPEED_FULL:
249 usbspd = USBSPD_SPEED_FULL;
250 break;
251 case USB_SPEED_HIGH:
252 usbspd = USBSPD_SPEED_HIGH;
253 break;
254 default:
255 dev_err(dev, "unsupported speed %d\n", speed);
256 return -EIO;
257 }
258
259 usbhs_write(priv, reg, UPPHUB(upphub) |
260 HUBPORT(hubport)|
261 USBSPD(usbspd));
262
263 return 0;
264}
265
f1407d5c
KM		 266/*
267 * local functions
268 */
11935de5 269static void usbhsc_set_buswait(struct usbhs_priv *priv)
f1407d5c
KM		 270{
271 int wait = usbhs_get_dparam(priv, buswait_bwait);
f1407d5c 272
11935de5
KM		 273 /* set bus wait if platform have */
274 if (wait)
275 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
f1407d5c
KM		 276}
277
278/*
279 * platform default param
280 */
281static u32 usbhsc_default_pipe_type[] = {
282 USB_ENDPOINT_XFER_CONTROL,
283 USB_ENDPOINT_XFER_ISOC,
284 USB_ENDPOINT_XFER_ISOC,
285 USB_ENDPOINT_XFER_BULK,
286 USB_ENDPOINT_XFER_BULK,
287 USB_ENDPOINT_XFER_BULK,
288 USB_ENDPOINT_XFER_INT,
289 USB_ENDPOINT_XFER_INT,
290 USB_ENDPOINT_XFER_INT,
291 USB_ENDPOINT_XFER_INT,
292};
293
294/*
6e267da8
KM		 295 * power control
296 */
297static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
298{
299 struct device *dev = usbhs_priv_to_dev(priv);
300
301 if (enable) {
302 /* enable PM */
303 pm_runtime_get_sync(dev);
304
305 /* USB on */
306 usbhs_sys_clock_ctrl(priv, enable);
6e267da8
KM		 307 } else {
308 /* USB off */
6e267da8
KM		 309 usbhs_sys_clock_ctrl(priv, enable);
310
311 /* disable PM */
312 pm_runtime_put_sync(dev);
313 }
314}
315
316/*
ca8a282a 317 * hotplug
f1407d5c 318 */
ca8a282a 319static void usbhsc_hotplug(struct usbhs_priv *priv)
f1407d5c 320{
f1407d5c
KM		 321 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
322 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
323 int id;
324 int enable;
325 int ret;
326
327 /*
328 * get vbus status from platform
329 */
330 enable = usbhs_platform_call(priv, get_vbus, pdev);
331
332 /*
333 * get id from platform
334 */
335 id = usbhs_platform_call(priv, get_id, pdev);
336
337 if (enable && !mod) {
338 ret = usbhs_mod_change(priv, id);
339 if (ret < 0)
340 return;
341
342 dev_dbg(&pdev->dev, "%s enable\n", __func__);
343
6e267da8 344 /* power on */
b002ff6e
KM		 345 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
346 usbhsc_power_ctrl(priv, enable);
f1407d5c 347
258485d9
KM		 348 /* bus init */
349 usbhsc_set_buswait(priv);
350 usbhsc_bus_init(priv);
351
f1407d5c
KM		 352 /* module start */
353 usbhs_mod_call(priv, start, priv);
354
355 } else if (!enable && mod) {
356 dev_dbg(&pdev->dev, "%s disable\n", __func__);
357
358 /* module stop */
359 usbhs_mod_call(priv, stop, priv);
360
258485d9
KM		 361 /* bus init */
362 usbhsc_bus_init(priv);
363
6e267da8 364 /* power off */
b002ff6e
KM		 365 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
366 usbhsc_power_ctrl(priv, enable);
f1407d5c
KM		 367
368 usbhs_mod_change(priv, -1);
369
370 /* reset phy for next connection */
371 usbhs_platform_call(priv, phy_reset, pdev);
372 }
373}
374
ca8a282a
KM		 375/*
376 * notify hotplug
377 */
378static void usbhsc_notify_hotplug(struct work_struct *work)
379{
380 struct usbhs_priv *priv = container_of(work,
381 struct usbhs_priv,
382 notify_hotplug_work.work);
383 usbhsc_hotplug(priv);
384}
385
bc57381e 386int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
f1407d5c 387{
206dcc2c 388 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
bc57381e 389 int delay = usbhs_get_dparam(priv, detection_delay);
f1407d5c
KM		 390
391 /*
392 * This functions will be called in interrupt.
393 * To make sure safety context,
394 * use workqueue for usbhs_notify_hotplug
395 */
bc57381e 396 schedule_delayed_work(&priv->notify_hotplug_work, delay);
f1407d5c
KM		 397 return 0;
398}
399
400/*
401 * platform functions
402 */
b7a8d17d 403static int usbhs_probe(struct platform_device *pdev)
f1407d5c
KM		 404{
405 struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
406 struct renesas_usbhs_driver_callback *dfunc;
407 struct usbhs_priv *priv;
408 struct resource *res;
409 unsigned int irq;
410 int ret;
411
412 /* check platform information */
413 if (!info ||
b002ff6e 414 !info->platform_callback.get_id) {
f1407d5c
KM		 415 dev_err(&pdev->dev, "no platform information\n");
416 return -EINVAL;
417 }
418
419 /* platform data */
420 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
421 irq = platform_get_irq(pdev, 0);
422 if (!res || (int)irq <= 0) {
423 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
424 return -ENODEV;
425 }
426
427 /* usb private data */
428 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
429 if (!priv) {
430 dev_err(&pdev->dev, "Could not allocate priv\n");
431 return -ENOMEM;
432 }
433
434 priv->base = ioremap_nocache(res->start, resource_size(res));
435 if (!priv->base) {
436 dev_err(&pdev->dev, "ioremap error.\n");
437 ret = -ENOMEM;
438 goto probe_end_kfree;
439 }
440
441 /*
442 * care platform info
443 */
48298206
KM		 444 memcpy(&priv->pfunc,
445 &info->platform_callback,
446 sizeof(struct renesas_usbhs_platform_callback));
447 memcpy(&priv->dparam,
448 &info->driver_param,
449 sizeof(struct renesas_usbhs_driver_param));
f1407d5c
KM		 450
451 /* set driver callback functions for platform */
452 dfunc = &info->driver_callback;
453 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
454
455 /* set default param if platform doesn't have */
48298206
KM		 456 if (!priv->dparam.pipe_type) {
457 priv->dparam.pipe_type = usbhsc_default_pipe_type;
458 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
f1407d5c 459 }
48298206
KM		 460 if (!priv->dparam.pio_dma_border)
461 priv->dparam.pio_dma_border = 64; /* 64byte */
f1407d5c 462
b002ff6e
KM		 463 /* FIXME */
464 /* runtime power control ? */
48298206 465 if (priv->pfunc.get_vbus)
b002ff6e
KM		 466 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
467
f1407d5c
KM		 468 /*
469 * priv settings
470 */
471 priv->irq = irq;
472 priv->pdev = pdev;
bc57381e 473 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
f1407d5c
KM		 474 spin_lock_init(usbhs_priv_to_lock(priv));
475
476 /* call pipe and module init */
477 ret = usbhs_pipe_probe(priv);
478 if (ret < 0)
97f93227 479 goto probe_end_iounmap;
f1407d5c 480
d3af90a5 481 ret = usbhs_fifo_probe(priv);
f1407d5c 482 if (ret < 0)
97f93227 483 goto probe_end_pipe_exit;
f1407d5c 484
d3af90a5
KM		 485 ret = usbhs_mod_probe(priv);
486 if (ret < 0)
487 goto probe_end_fifo_exit;
488
f1407d5c
KM		 489 /* dev_set_drvdata should be called after usbhs_mod_init */
490 dev_set_drvdata(&pdev->dev, priv);
491
492 /*
493 * deviece reset here because
494 * USB device might be used in boot loader.
495 */
496 usbhs_sys_clock_ctrl(priv, 0);
497
498 /*
499 * platform call
500 *
501 * USB phy setup might depend on CPU/Board.
502 * If platform has its callback functions,
503 * call it here.
504 */
505 ret = usbhs_platform_call(priv, hardware_init, pdev);
506 if (ret < 0) {
507 dev_err(&pdev->dev, "platform prove failed.\n");
97f93227 508 goto probe_end_mod_exit;
f1407d5c
KM		 509 }
510
511 /* reset phy for connection */
512 usbhs_platform_call(priv, phy_reset, pdev);
513
b002ff6e
KM		 514 /* power control */
515 pm_runtime_enable(&pdev->dev);
516 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
517 usbhsc_power_ctrl(priv, 1);
518 usbhs_mod_autonomy_mode(priv);
519 }
520
f1407d5c
KM		 521 /*
522 * manual call notify_hotplug for cold plug
523 */
f1407d5c
KM		 524 ret = usbhsc_drvcllbck_notify_hotplug(pdev);
525 if (ret < 0)
526 goto probe_end_call_remove;
527
528 dev_info(&pdev->dev, "probed\n");
529
530 return ret;
531
532probe_end_call_remove:
533 usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c
KM		 534probe_end_mod_exit:
535 usbhs_mod_remove(priv);
d3af90a5
KM		 536probe_end_fifo_exit:
537 usbhs_fifo_remove(priv);
97f93227
KM		 538probe_end_pipe_exit:
539 usbhs_pipe_remove(priv);
f1407d5c
KM		 540probe_end_iounmap:
541 iounmap(priv->base);
542probe_end_kfree:
543 kfree(priv);
544
545 dev_info(&pdev->dev, "probe failed\n");
546
547 return ret;
548}
549
550static int __devexit usbhs_remove(struct platform_device *pdev)
551{
206dcc2c 552 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
af32fe51
KM		 553 struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
554 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
f1407d5c
KM		 555
556 dev_dbg(&pdev->dev, "usb remove\n");
557
af32fe51
KM		 558 dfunc->notify_hotplug = NULL;
559
b002ff6e
KM		 560 /* power off */
561 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
562 usbhsc_power_ctrl(priv, 0);
f1407d5c 563
b002ff6e 564 pm_runtime_disable(&pdev->dev);
f1407d5c
KM		 565
566 usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c 567 usbhs_mod_remove(priv);
d3af90a5 568 usbhs_fifo_remove(priv);
97f93227 569 usbhs_pipe_remove(priv);
f1407d5c
KM		 570 iounmap(priv->base);
571 kfree(priv);
572
573 return 0;
574}
575
ca8a282a
KM		 576static int usbhsc_suspend(struct device *dev)
577{
578 struct usbhs_priv *priv = dev_get_drvdata(dev);
579 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
580
581 if (mod) {
582 usbhs_mod_call(priv, stop, priv);
583 usbhs_mod_change(priv, -1);
584 }
585
586 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
587 usbhsc_power_ctrl(priv, 0);
588
589 return 0;
590}
591
592static int usbhsc_resume(struct device *dev)
593{
594 struct usbhs_priv *priv = dev_get_drvdata(dev);
595 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
596
597 usbhs_platform_call(priv, phy_reset, pdev);
598
599 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
600 usbhsc_power_ctrl(priv, 1);
601
602 usbhsc_hotplug(priv);
603
604 return 0;
605}
606
607static int usbhsc_runtime_nop(struct device *dev)
608{
609 /* Runtime PM callback shared between ->runtime_suspend()
610 * and ->runtime_resume(). Simply returns success.
611 *
612 * This driver re-initializes all registers after
613 * pm_runtime_get_sync() anyway so there is no need
614 * to save and restore registers here.
615 */
616 return 0;
617}
618
619static const struct dev_pm_ops usbhsc_pm_ops = {
620 .suspend = usbhsc_suspend,
621 .resume = usbhsc_resume,
622 .runtime_suspend = usbhsc_runtime_nop,
623 .runtime_resume = usbhsc_runtime_nop,
624};
625
f1407d5c
KM		 626static struct platform_driver renesas_usbhs_driver = {
627 .driver = {
628 .name = "renesas_usbhs",
ca8a282a 629 .pm = &usbhsc_pm_ops,
f1407d5c
KM		 630 },
631 .probe = usbhs_probe,
632 .remove = __devexit_p(usbhs_remove),
633};
634
635static int __init usbhs_init(void)
636{
637 return platform_driver_register(&renesas_usbhs_driver);
638}
639
640static void __exit usbhs_exit(void)
641{
642 platform_driver_unregister(&renesas_usbhs_driver);
643}
644
645module_init(usbhs_init);
646module_exit(usbhs_exit);
647
648MODULE_LICENSE("GPL");
649MODULE_DESCRIPTION("Renesas USB driver");
650MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Linux kernel - Deliverables
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