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usb: remove use of __devinitconst
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
cc502bb7 22#include "common.h"
f1407d5c 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 */
76190152 98static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
f1407d5c
KM		 99{
100 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
101}
102
f1407d5c
KM		 103void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
104{
3244a7b4
KM		 105 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
106 u16 val = DCFM | DRPD | HSE | USBE;
f427eb64
KM		 107 int has_otg = usbhs_get_dparam(priv, has_otg);
108
109 if (has_otg)
110 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
f1407d5c
KM		 111
112 /*
113 * if enable
114 *
115 * - select Host mode
116 * - D+ Line/D- Line Pull-down
117 */
118 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
119}
120
121void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
122{
3244a7b4
KM		 123 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
124 u16 val = DPRPU | HSE | USBE;
f1407d5c
KM		 125
126 /*
127 * if enable
128 *
129 * - select Function mode
130 * - D+ Line Pull-up
131 */
132 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
133}
134
4cd2f599
KM		 135void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
136{
137 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
138}
139
dfbb7f4f
KM		 140void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
141{
142 usbhs_write(priv, TESTMODE, mode);
143}
144
f1407d5c
KM		 145/*
146 * frame functions
147 */
148int usbhs_frame_get_num(struct usbhs_priv *priv)
149{
150 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
151}
152
ef8bedb9
KM		 153/*
154 * usb request functions
155 */
156void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
157{
158 u16 val;
159
160 val = usbhs_read(priv, USBREQ);
161 req->bRequest = (val >> 8) & 0xFF;
162 req->bRequestType = (val >> 0) & 0xFF;
163
164 req->wValue = usbhs_read(priv, USBVAL);
165 req->wIndex = usbhs_read(priv, USBINDX);
166 req->wLength = usbhs_read(priv, USBLENG);
167}
168
169void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
170{
171 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
172 usbhs_write(priv, USBVAL, req->wValue);
173 usbhs_write(priv, USBINDX, req->wIndex);
174 usbhs_write(priv, USBLENG, req->wLength);
175
176 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
177}
178
258485d9
KM		 179/*
180 * bus/vbus functions
181 */
182void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
183{
a9be4a45
KM		 184 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
185
186 if (status != USBRST) {
187 struct device *dev = usbhs_priv_to_dev(priv);
188 dev_err(dev, "usbhs should be reset\n");
189 }
190
258485d9
KM		 191 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
192}
193
194void usbhs_bus_send_reset(struct usbhs_priv *priv)
195{
196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
197}
198
75587f52
KM		 199int usbhs_bus_get_speed(struct usbhs_priv *priv)
200{
201 u16 dvstctr = usbhs_read(priv, DVSTCTR);
202
203 switch (RHST & dvstctr) {
204 case RHST_LOW_SPEED:
205 return USB_SPEED_LOW;
206 case RHST_FULL_SPEED:
207 return USB_SPEED_FULL;
208 case RHST_HIGH_SPEED:
209 return USB_SPEED_HIGH;
210 }
211
212 return USB_SPEED_UNKNOWN;
213}
214
258485d9
KM		 215int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
216{
217 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
218
219 return usbhs_platform_call(priv, set_vbus, pdev, enable);
220}
221
222static void usbhsc_bus_init(struct usbhs_priv *priv)
223{
224 usbhs_write(priv, DVSTCTR, 0);
225
226 usbhs_vbus_ctrl(priv, 0);
227}
228
eb05191f
KM		 229/*
230 * device configuration
231 */
3dd49268 232int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
eb05191f
KM		 233 u16 upphub, u16 hubport, u16 speed)
234{
235 struct device *dev = usbhs_priv_to_dev(priv);
236 u16 usbspd = 0;
237 u32 reg = DEVADD0 + (2 * devnum);
238
239 if (devnum > 10) {
240 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
241 return -EIO;
242 }
243
244 if (upphub > 0xA) {
245 dev_err(dev, "unsupported hub number %d\n", upphub);
246 return -EIO;
247 }
248
249 switch (speed) {
250 case USB_SPEED_LOW:
251 usbspd = USBSPD_SPEED_LOW;
252 break;
253 case USB_SPEED_FULL:
254 usbspd = USBSPD_SPEED_FULL;
255 break;
256 case USB_SPEED_HIGH:
257 usbspd = USBSPD_SPEED_HIGH;
258 break;
259 default:
260 dev_err(dev, "unsupported speed %d\n", speed);
261 return -EIO;
262 }
263
264 usbhs_write(priv, reg, UPPHUB(upphub) |
265 HUBPORT(hubport)|
266 USBSPD(usbspd));
267
268 return 0;
269}
270
f1407d5c
KM		 271/*
272 * local functions
273 */
11935de5 274static void usbhsc_set_buswait(struct usbhs_priv *priv)
f1407d5c
KM		 275{
276 int wait = usbhs_get_dparam(priv, buswait_bwait);
f1407d5c 277
11935de5
KM		 278 /* set bus wait if platform have */
279 if (wait)
280 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
f1407d5c
KM		 281}
282
283/*
284 * platform default param
285 */
286static u32 usbhsc_default_pipe_type[] = {
287 USB_ENDPOINT_XFER_CONTROL,
288 USB_ENDPOINT_XFER_ISOC,
289 USB_ENDPOINT_XFER_ISOC,
290 USB_ENDPOINT_XFER_BULK,
291 USB_ENDPOINT_XFER_BULK,
292 USB_ENDPOINT_XFER_BULK,
293 USB_ENDPOINT_XFER_INT,
294 USB_ENDPOINT_XFER_INT,
295 USB_ENDPOINT_XFER_INT,
296 USB_ENDPOINT_XFER_INT,
297};
298
299/*
6e267da8
KM		 300 * power control
301 */
302static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
303{
f1ee56a0 304 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
6e267da8
KM		 305 struct device *dev = usbhs_priv_to_dev(priv);
306
307 if (enable) {
308 /* enable PM */
309 pm_runtime_get_sync(dev);
310
f1ee56a0
KM		 311 /* enable platform power */
312 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
313
6e267da8
KM		 314 /* USB on */
315 usbhs_sys_clock_ctrl(priv, enable);
6e267da8
KM		 316 } else {
317 /* USB off */
6e267da8
KM		 318 usbhs_sys_clock_ctrl(priv, enable);
319
f1ee56a0
KM		 320 /* disable platform power */
321 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
322
6e267da8
KM		 323 /* disable PM */
324 pm_runtime_put_sync(dev);
325 }
326}
327
328/*
ca8a282a 329 * hotplug
f1407d5c 330 */
ca8a282a 331static void usbhsc_hotplug(struct usbhs_priv *priv)
f1407d5c 332{
f1407d5c
KM		 333 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
334 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
335 int id;
336 int enable;
337 int ret;
338
339 /*
340 * get vbus status from platform
341 */
342 enable = usbhs_platform_call(priv, get_vbus, pdev);
343
344 /*
345 * get id from platform
346 */
347 id = usbhs_platform_call(priv, get_id, pdev);
348
349 if (enable && !mod) {
350 ret = usbhs_mod_change(priv, id);
351 if (ret < 0)
352 return;
353
354 dev_dbg(&pdev->dev, "%s enable\n", __func__);
355
6e267da8 356 /* power on */
b002ff6e
KM		 357 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
358 usbhsc_power_ctrl(priv, enable);
f1407d5c 359
258485d9
KM		 360 /* bus init */
361 usbhsc_set_buswait(priv);
362 usbhsc_bus_init(priv);
363
f1407d5c
KM		 364 /* module start */
365 usbhs_mod_call(priv, start, priv);
366
367 } else if (!enable && mod) {
368 dev_dbg(&pdev->dev, "%s disable\n", __func__);
369
370 /* module stop */
371 usbhs_mod_call(priv, stop, priv);
372
258485d9
KM		 373 /* bus init */
374 usbhsc_bus_init(priv);
375
6e267da8 376 /* power off */
b002ff6e
KM		 377 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
378 usbhsc_power_ctrl(priv, enable);
f1407d5c
KM		 379
380 usbhs_mod_change(priv, -1);
381
382 /* reset phy for next connection */
383 usbhs_platform_call(priv, phy_reset, pdev);
384 }
385}
386
ca8a282a
KM		 387/*
388 * notify hotplug
389 */
390static void usbhsc_notify_hotplug(struct work_struct *work)
391{
392 struct usbhs_priv *priv = container_of(work,
393 struct usbhs_priv,
394 notify_hotplug_work.work);
395 usbhsc_hotplug(priv);
396}
397
b4fcea2a 398static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
f1407d5c 399{
206dcc2c 400 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
bc57381e 401 int delay = usbhs_get_dparam(priv, detection_delay);
f1407d5c
KM		 402
403 /*
404 * This functions will be called in interrupt.
405 * To make sure safety context,
406 * use workqueue for usbhs_notify_hotplug
407 */
a49a88f1
KM		 408 schedule_delayed_work(&priv->notify_hotplug_work,
409 msecs_to_jiffies(delay));
f1407d5c
KM		 410 return 0;
411}
412
413/*
414 * platform functions
415 */
b7a8d17d 416static int usbhs_probe(struct platform_device *pdev)
f1407d5c
KM		 417{
418 struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
419 struct renesas_usbhs_driver_callback *dfunc;
420 struct usbhs_priv *priv;
53069af3 421 struct resource *res, *irq_res;
f1407d5c
KM		 422 int ret;
423
424 /* check platform information */
425 if (!info ||
b002ff6e 426 !info->platform_callback.get_id) {
f1407d5c
KM		 427 dev_err(&pdev->dev, "no platform information\n");
428 return -EINVAL;
429 }
430
431 /* platform data */
432 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
53069af3
SY		 433 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
434 if (!res || !irq_res) {
f1407d5c
KM		 435 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
436 return -ENODEV;
437 }
438
439 /* usb private data */
58efc77c 440 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
f1407d5c
KM		 441 if (!priv) {
442 dev_err(&pdev->dev, "Could not allocate priv\n");
443 return -ENOMEM;
444 }
445
58efc77c 446 priv->base = devm_request_and_ioremap(&pdev->dev, res);
f1407d5c
KM		 447 if (!priv->base) {
448 dev_err(&pdev->dev, "ioremap error.\n");
58efc77c 449 return -ENOMEM;
f1407d5c
KM		 450 }
451
452 /*
453 * care platform info
454 */
48298206
KM		 455 memcpy(&priv->pfunc,
456 &info->platform_callback,
457 sizeof(struct renesas_usbhs_platform_callback));
458 memcpy(&priv->dparam,
459 &info->driver_param,
460 sizeof(struct renesas_usbhs_driver_param));
f1407d5c
KM		 461
462 /* set driver callback functions for platform */
463 dfunc = &info->driver_callback;
464 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
465
466 /* set default param if platform doesn't have */
48298206
KM		 467 if (!priv->dparam.pipe_type) {
468 priv->dparam.pipe_type = usbhsc_default_pipe_type;
469 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
f1407d5c 470 }
48298206
KM		 471 if (!priv->dparam.pio_dma_border)
472 priv->dparam.pio_dma_border = 64; /* 64byte */
f1407d5c 473
b002ff6e
KM		 474 /* FIXME */
475 /* runtime power control ? */
48298206 476 if (priv->pfunc.get_vbus)
b002ff6e
KM		 477 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
478
f1407d5c
KM		 479 /*
480 * priv settings
481 */
53069af3
SY		 482 priv->irq = irq_res->start;
483 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
484 priv->irqflags = IRQF_SHARED;
f1407d5c 485 priv->pdev = pdev;
bc57381e 486 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
f1407d5c
KM		 487 spin_lock_init(usbhs_priv_to_lock(priv));
488
489 /* call pipe and module init */
490 ret = usbhs_pipe_probe(priv);
491 if (ret < 0)
58efc77c 492 return ret;
f1407d5c 493
d3af90a5 494 ret = usbhs_fifo_probe(priv);
f1407d5c 495 if (ret < 0)
97f93227 496 goto probe_end_pipe_exit;
f1407d5c 497
d3af90a5
KM		 498 ret = usbhs_mod_probe(priv);
499 if (ret < 0)
500 goto probe_end_fifo_exit;
501
f1407d5c
KM		 502 /* dev_set_drvdata should be called after usbhs_mod_init */
503 dev_set_drvdata(&pdev->dev, priv);
504
505 /*
506 * deviece reset here because
507 * USB device might be used in boot loader.
508 */
509 usbhs_sys_clock_ctrl(priv, 0);
510
511 /*
512 * platform call
513 *
514 * USB phy setup might depend on CPU/Board.
515 * If platform has its callback functions,
516 * call it here.
517 */
518 ret = usbhs_platform_call(priv, hardware_init, pdev);
519 if (ret < 0) {
520 dev_err(&pdev->dev, "platform prove failed.\n");
97f93227 521 goto probe_end_mod_exit;
f1407d5c
KM		 522 }
523
524 /* reset phy for connection */
525 usbhs_platform_call(priv, phy_reset, pdev);
526
b002ff6e
KM		 527 /* power control */
528 pm_runtime_enable(&pdev->dev);
529 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
530 usbhsc_power_ctrl(priv, 1);
531 usbhs_mod_autonomy_mode(priv);
532 }
533
f1407d5c
KM		 534 /*
535 * manual call notify_hotplug for cold plug
536 */
f1407d5c
KM		 537 ret = usbhsc_drvcllbck_notify_hotplug(pdev);
538 if (ret < 0)
539 goto probe_end_call_remove;
540
541 dev_info(&pdev->dev, "probed\n");
542
543 return ret;
544
545probe_end_call_remove:
546 usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c
KM		 547probe_end_mod_exit:
548 usbhs_mod_remove(priv);
d3af90a5
KM		 549probe_end_fifo_exit:
550 usbhs_fifo_remove(priv);
97f93227
KM		 551probe_end_pipe_exit:
552 usbhs_pipe_remove(priv);
f1407d5c
KM		 553
554 dev_info(&pdev->dev, "probe failed\n");
555
556 return ret;
557}
558
559static int __devexit usbhs_remove(struct platform_device *pdev)
560{
206dcc2c 561 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
af32fe51
KM		 562 struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
563 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
f1407d5c
KM		 564
565 dev_dbg(&pdev->dev, "usb remove\n");
566
af32fe51
KM		 567 dfunc->notify_hotplug = NULL;
568
b002ff6e
KM		 569 /* power off */
570 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
571 usbhsc_power_ctrl(priv, 0);
f1407d5c 572
b002ff6e 573 pm_runtime_disable(&pdev->dev);
f1407d5c
KM		 574
575 usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c 576 usbhs_mod_remove(priv);
d3af90a5 577 usbhs_fifo_remove(priv);
97f93227 578 usbhs_pipe_remove(priv);
f1407d5c
KM		 579
580 return 0;
581}
582
ca8a282a
KM		 583static int usbhsc_suspend(struct device *dev)
584{
585 struct usbhs_priv *priv = dev_get_drvdata(dev);
586 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
587
588 if (mod) {
589 usbhs_mod_call(priv, stop, priv);
590 usbhs_mod_change(priv, -1);
591 }
592
593 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
594 usbhsc_power_ctrl(priv, 0);
595
596 return 0;
597}
598
599static int usbhsc_resume(struct device *dev)
600{
601 struct usbhs_priv *priv = dev_get_drvdata(dev);
602 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
603
ca8a282a
KM		 604 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
605 usbhsc_power_ctrl(priv, 1);
606
5b50d3b5
KM		 607 usbhs_platform_call(priv, phy_reset, pdev);
608
609 usbhsc_drvcllbck_notify_hotplug(pdev);
ca8a282a
KM		 610
611 return 0;
612}
613
614static int usbhsc_runtime_nop(struct device *dev)
615{
616 /* Runtime PM callback shared between ->runtime_suspend()
617 * and ->runtime_resume(). Simply returns success.
618 *
619 * This driver re-initializes all registers after
620 * pm_runtime_get_sync() anyway so there is no need
621 * to save and restore registers here.
622 */
623 return 0;
624}
625
626static const struct dev_pm_ops usbhsc_pm_ops = {
627 .suspend = usbhsc_suspend,
628 .resume = usbhsc_resume,
629 .runtime_suspend = usbhsc_runtime_nop,
630 .runtime_resume = usbhsc_runtime_nop,
631};
632
f1407d5c
KM		 633static struct platform_driver renesas_usbhs_driver = {
634 .driver = {
635 .name = "renesas_usbhs",
ca8a282a 636 .pm = &usbhsc_pm_ops,
f1407d5c
KM		 637 },
638 .probe = usbhs_probe,
7690417d 639 .remove = usbhs_remove,
f1407d5c
KM		 640};
641
cc27c96c 642module_platform_driver(renesas_usbhs_driver);
f1407d5c
KM		 643
644MODULE_LICENSE("GPL");
645MODULE_DESCRIPTION("Renesas USB driver");
646MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
kernel source for telekom puls (alcatel/mediatek)