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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * core.c - ChipIdea USB IP core family device controller
4 *
5 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
6 * Copyright (C) 2020 NXP
7 *
8 * Author: David Lopo
9 * Peter Chen <peter.chen@nxp.com>
10 *
11 * Main Features:
12 * - Four transfers are supported, usbtest is passed
13 * - USB Certification for gadget: CH9 and Mass Storage are passed
14 * - Low power mode
15 * - USB wakeup
16 */
17#include <linux/delay.h>
18#include <linux/device.h>
19#include <linux/dma-mapping.h>
20#include <linux/extcon.h>
21#include <linux/phy/phy.h>
22#include <linux/platform_device.h>
23#include <linux/module.h>
24#include <linux/idr.h>
25#include <linux/interrupt.h>
26#include <linux/io.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
29#include <linux/pm_runtime.h>
30#include <linux/pinctrl/consumer.h>
31#include <linux/usb/ch9.h>
32#include <linux/usb/gadget.h>
33#include <linux/usb/otg.h>
34#include <linux/usb/chipidea.h>
35#include <linux/usb/of.h>
36#include <linux/of.h>
37#include <linux/regulator/consumer.h>
38#include <linux/usb/ehci_def.h>
39
40#include "ci.h"
41#include "udc.h"
42#include "bits.h"
43#include "host.h"
44#include "otg.h"
45#include "otg_fsm.h"
46
47/* Controller register map */
48static const u8 ci_regs_nolpm[] = {
49 [CAP_CAPLENGTH] = 0x00U,
50 [CAP_HCCPARAMS] = 0x08U,
51 [CAP_DCCPARAMS] = 0x24U,
52 [CAP_TESTMODE] = 0x38U,
53 [OP_USBCMD] = 0x00U,
54 [OP_USBSTS] = 0x04U,
55 [OP_USBINTR] = 0x08U,
56 [OP_DEVICEADDR] = 0x14U,
57 [OP_ENDPTLISTADDR] = 0x18U,
58 [OP_TTCTRL] = 0x1CU,
59 [OP_BURSTSIZE] = 0x20U,
60 [OP_ULPI_VIEWPORT] = 0x30U,
61 [OP_PORTSC] = 0x44U,
62 [OP_DEVLC] = 0x84U,
63 [OP_OTGSC] = 0x64U,
64 [OP_USBMODE] = 0x68U,
65 [OP_ENDPTSETUPSTAT] = 0x6CU,
66 [OP_ENDPTPRIME] = 0x70U,
67 [OP_ENDPTFLUSH] = 0x74U,
68 [OP_ENDPTSTAT] = 0x78U,
69 [OP_ENDPTCOMPLETE] = 0x7CU,
70 [OP_ENDPTCTRL] = 0x80U,
71};
72
73static const u8 ci_regs_lpm[] = {
74 [CAP_CAPLENGTH] = 0x00U,
75 [CAP_HCCPARAMS] = 0x08U,
76 [CAP_DCCPARAMS] = 0x24U,
77 [CAP_TESTMODE] = 0xFCU,
78 [OP_USBCMD] = 0x00U,
79 [OP_USBSTS] = 0x04U,
80 [OP_USBINTR] = 0x08U,
81 [OP_DEVICEADDR] = 0x14U,
82 [OP_ENDPTLISTADDR] = 0x18U,
83 [OP_TTCTRL] = 0x1CU,
84 [OP_BURSTSIZE] = 0x20U,
85 [OP_ULPI_VIEWPORT] = 0x30U,
86 [OP_PORTSC] = 0x44U,
87 [OP_DEVLC] = 0x84U,
88 [OP_OTGSC] = 0xC4U,
89 [OP_USBMODE] = 0xC8U,
90 [OP_ENDPTSETUPSTAT] = 0xD8U,
91 [OP_ENDPTPRIME] = 0xDCU,
92 [OP_ENDPTFLUSH] = 0xE0U,
93 [OP_ENDPTSTAT] = 0xE4U,
94 [OP_ENDPTCOMPLETE] = 0xE8U,
95 [OP_ENDPTCTRL] = 0xECU,
96};
97
98static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm)
99{
100 int i;
101
102 for (i = 0; i < OP_ENDPTCTRL; i++)
103 ci->hw_bank.regmap[i] =
104 (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) +
105 (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
106
107 for (; i <= OP_LAST; i++)
108 ci->hw_bank.regmap[i] = ci->hw_bank.op +
109 4 * (i - OP_ENDPTCTRL) +
110 (is_lpm
111 ? ci_regs_lpm[OP_ENDPTCTRL]
112 : ci_regs_nolpm[OP_ENDPTCTRL]);
113
114}
115
116static enum ci_revision ci_get_revision(struct ci_hdrc *ci)
117{
118 int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION);
119 enum ci_revision rev = CI_REVISION_UNKNOWN;
120
121 if (ver == 0x2) {
122 rev = hw_read_id_reg(ci, ID_ID, REVISION)
123 >> __ffs(REVISION);
124 rev += CI_REVISION_20;
125 } else if (ver == 0x0) {
126 rev = CI_REVISION_1X;
127 }
128
129 return rev;
130}
131
132/**
133 * hw_read_intr_enable: returns interrupt enable register
134 *
135 * @ci: the controller
136 *
137 * This function returns register data
138 */
139u32 hw_read_intr_enable(struct ci_hdrc *ci)
140{
141 return hw_read(ci, OP_USBINTR, ~0);
142}
143
144/**
145 * hw_read_intr_status: returns interrupt status register
146 *
147 * @ci: the controller
148 *
149 * This function returns register data
150 */
151u32 hw_read_intr_status(struct ci_hdrc *ci)
152{
153 return hw_read(ci, OP_USBSTS, ~0);
154}
155
156/**
157 * hw_port_test_set: writes port test mode (execute without interruption)
158 * @ci: the controller
159 * @mode: new value
160 *
161 * This function returns an error code
162 */
163int hw_port_test_set(struct ci_hdrc *ci, u8 mode)
164{
165 const u8 TEST_MODE_MAX = 7;
166
167 if (mode > TEST_MODE_MAX)
168 return -EINVAL;
169
170 hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC));
171 return 0;
172}
173
174/**
175 * hw_port_test_get: reads port test mode value
176 *
177 * @ci: the controller
178 *
179 * This function returns port test mode value
180 */
181u8 hw_port_test_get(struct ci_hdrc *ci)
182{
183 return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC);
184}
185
186static void hw_wait_phy_stable(void)
187{
188 /*
189 * The phy needs some delay to output the stable status from low
190 * power mode. And for OTGSC, the status inputs are debounced
191 * using a 1 ms time constant, so, delay 2ms for controller to get
192 * the stable status, like vbus and id when the phy leaves low power.
193 */
194 usleep_range(2000, 2500);
195}
196
197/* The PHY enters/leaves low power mode */
198static void ci_hdrc_enter_lpm_common(struct ci_hdrc *ci, bool enable)
199{
200 enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC;
201 bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm)));
202
203 if (enable && !lpm)
204 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
205 PORTSC_PHCD(ci->hw_bank.lpm));
206 else if (!enable && lpm)
207 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
208 0);
209}
210
211static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable)
212{
213 return ci->platdata->enter_lpm(ci, enable);
214}
215
216static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
217{
218 u32 reg;
219
220 /* bank is a module variable */
221 ci->hw_bank.abs = base;
222
223 ci->hw_bank.cap = ci->hw_bank.abs;
224 ci->hw_bank.cap += ci->platdata->capoffset;
225 ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff);
226
227 hw_alloc_regmap(ci, false);
228 reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
229 __ffs(HCCPARAMS_LEN);
230 ci->hw_bank.lpm = reg;
231 if (reg)
232 hw_alloc_regmap(ci, !!reg);
233 ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs;
234 ci->hw_bank.size += OP_LAST;
235 ci->hw_bank.size /= sizeof(u32);
236
237 reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
238 __ffs(DCCPARAMS_DEN);
239 ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
240
241 if (ci->hw_ep_max > ENDPT_MAX)
242 return -ENODEV;
243
244 ci_hdrc_enter_lpm(ci, false);
245
246 /* Disable all interrupts bits */
247 hw_write(ci, OP_USBINTR, 0xffffffff, 0);
248
249 /* Clear all interrupts status bits*/
250 hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff);
251
252 ci->rev = ci_get_revision(ci);
253
254 dev_dbg(ci->dev,
255 "revision: %d, lpm: %d; cap: %px op: %px\n",
256 ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op);
257
258 /* setup lock mode ? */
259
260 /* ENDPTSETUPSTAT is '0' by default */
261
262 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
263
264 return 0;
265}
266
267void hw_phymode_configure(struct ci_hdrc *ci)
268{
269 u32 portsc, lpm, sts = 0;
270
271 switch (ci->platdata->phy_mode) {
272 case USBPHY_INTERFACE_MODE_UTMI:
273 portsc = PORTSC_PTS(PTS_UTMI);
274 lpm = DEVLC_PTS(PTS_UTMI);
275 break;
276 case USBPHY_INTERFACE_MODE_UTMIW:
277 portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW;
278 lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW;
279 break;
280 case USBPHY_INTERFACE_MODE_ULPI:
281 portsc = PORTSC_PTS(PTS_ULPI);
282 lpm = DEVLC_PTS(PTS_ULPI);
283 break;
284 case USBPHY_INTERFACE_MODE_SERIAL:
285 portsc = PORTSC_PTS(PTS_SERIAL);
286 lpm = DEVLC_PTS(PTS_SERIAL);
287 sts = 1;
288 break;
289 case USBPHY_INTERFACE_MODE_HSIC:
290 portsc = PORTSC_PTS(PTS_HSIC);
291 lpm = DEVLC_PTS(PTS_HSIC);
292 break;
293 default:
294 return;
295 }
296
297 if (ci->hw_bank.lpm) {
298 hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm);
299 if (sts)
300 hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS);
301 } else {
302 hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc);
303 if (sts)
304 hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
305 }
306}
307EXPORT_SYMBOL_GPL(hw_phymode_configure);
308
309/**
310 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
311 * interfaces
312 * @ci: the controller
313 *
314 * This function returns an error code if the phy failed to init
315 */
316static int _ci_usb_phy_init(struct ci_hdrc *ci)
317{
318 int ret;
319
320 if (ci->phy) {
321 ret = phy_init(ci->phy);
322 if (ret)
323 return ret;
324
325 ret = phy_power_on(ci->phy);
326 if (ret) {
327 phy_exit(ci->phy);
328 return ret;
329 }
330 } else {
331 ret = usb_phy_init(ci->usb_phy);
332 }
333
334 return ret;
335}
336
337/**
338 * ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy
339 * interfaces
340 * @ci: the controller
341 */
342static void ci_usb_phy_exit(struct ci_hdrc *ci)
343{
344 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
345 return;
346
347 if (ci->phy) {
348 phy_power_off(ci->phy);
349 phy_exit(ci->phy);
350 } else {
351 usb_phy_shutdown(ci->usb_phy);
352 }
353}
354
355/**
356 * ci_usb_phy_init: initialize phy according to different phy type
357 * @ci: the controller
358 *
359 * This function returns an error code if usb_phy_init has failed
360 */
361static int ci_usb_phy_init(struct ci_hdrc *ci)
362{
363 int ret;
364
365 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
366 return 0;
367
368 switch (ci->platdata->phy_mode) {
369 case USBPHY_INTERFACE_MODE_UTMI:
370 case USBPHY_INTERFACE_MODE_UTMIW:
371 case USBPHY_INTERFACE_MODE_HSIC:
372 ret = _ci_usb_phy_init(ci);
373 if (!ret)
374 hw_wait_phy_stable();
375 else
376 return ret;
377 hw_phymode_configure(ci);
378 break;
379 case USBPHY_INTERFACE_MODE_ULPI:
380 case USBPHY_INTERFACE_MODE_SERIAL:
381 hw_phymode_configure(ci);
382 ret = _ci_usb_phy_init(ci);
383 if (ret)
384 return ret;
385 break;
386 default:
387 ret = _ci_usb_phy_init(ci);
388 if (!ret)
389 hw_wait_phy_stable();
390 }
391
392 return ret;
393}
394
395
396/**
397 * ci_platform_configure: do controller configure
398 * @ci: the controller
399 *
400 */
401void ci_platform_configure(struct ci_hdrc *ci)
402{
403 bool is_device_mode, is_host_mode;
404
405 is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC;
406 is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC;
407
408 if (is_device_mode) {
409 phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
410
411 if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING)
412 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
413 USBMODE_CI_SDIS);
414 }
415
416 if (is_host_mode) {
417 phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
418
419 if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
420 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
421 USBMODE_CI_SDIS);
422 }
423
424 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
425 if (ci->hw_bank.lpm)
426 hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
427 else
428 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
429 }
430
431 if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA)
432 hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA);
433
434 hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16);
435
436 if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST)
437 hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK,
438 ci->platdata->ahb_burst_config);
439
440 /* override burst size, take effect only when ahb_burst_config is 0 */
441 if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) {
442 if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST)
443 hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK,
444 ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK));
445
446 if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST)
447 hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK,
448 ci->platdata->rx_burst_size);
449 }
450}
451
452/**
453 * hw_controller_reset: do controller reset
454 * @ci: the controller
455 *
456 * This function returns an error code
457 */
458static int hw_controller_reset(struct ci_hdrc *ci)
459{
460 int count = 0;
461
462 hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST);
463 while (hw_read(ci, OP_USBCMD, USBCMD_RST)) {
464 udelay(10);
465 if (count++ > 1000)
466 return -ETIMEDOUT;
467 }
468
469 return 0;
470}
471
472/**
473 * hw_device_reset: resets chip (execute without interruption)
474 * @ci: the controller
475 *
476 * This function returns an error code
477 */
478int hw_device_reset(struct ci_hdrc *ci)
479{
480 int ret;
481
482 /* should flush & stop before reset */
483 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
484 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
485
486 ret = hw_controller_reset(ci);
487 if (ret) {
488 dev_err(ci->dev, "error resetting controller, ret=%d\n", ret);
489 return ret;
490 }
491
492 if (ci->platdata->notify_event) {
493 ret = ci->platdata->notify_event(ci,
494 CI_HDRC_CONTROLLER_RESET_EVENT);
495 if (ret)
496 return ret;
497 }
498
499 /* USBMODE should be configured step by step */
500 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
501 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC);
502 /* HW >= 2.3 */
503 hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
504
505 if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) {
506 dev_err(ci->dev, "cannot enter in %s device mode\n",
507 ci_role(ci)->name);
508 dev_err(ci->dev, "lpm = %i\n", ci->hw_bank.lpm);
509 return -ENODEV;
510 }
511
512 ci_platform_configure(ci);
513
514 return 0;
515}
516
517static irqreturn_t ci_irq(int irq, void *data)
518{
519 struct ci_hdrc *ci = data;
520 irqreturn_t ret = IRQ_NONE;
521 u32 otgsc = 0;
522
523 if (ci->in_lpm) {
524 disable_irq_nosync(irq);
525 ci->wakeup_int = true;
526 pm_runtime_get(ci->dev);
527 return IRQ_HANDLED;
528 }
529
530 if (ci->is_otg) {
531 otgsc = hw_read_otgsc(ci, ~0);
532 if (ci_otg_is_fsm_mode(ci)) {
533 ret = ci_otg_fsm_irq(ci);
534 if (ret == IRQ_HANDLED)
535 return ret;
536 }
537 }
538
539 /*
540 * Handle id change interrupt, it indicates device/host function
541 * switch.
542 */
543 if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) {
544 ci->id_event = true;
545 /* Clear ID change irq status */
546 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS);
547 ci_otg_queue_work(ci);
548 return IRQ_HANDLED;
549 }
550
551 /*
552 * Handle vbus change interrupt, it indicates device connection
553 * and disconnection events.
554 */
555 if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) {
556 ci->b_sess_valid_event = true;
557 /* Clear BSV irq */
558 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS);
559 ci_otg_queue_work(ci);
560 return IRQ_HANDLED;
561 }
562
563 /* Handle device/host interrupt */
564 if (ci->role != CI_ROLE_END)
565 ret = ci_role(ci)->irq(ci);
566
567 return ret;
568}
569
570static int ci_cable_notifier(struct notifier_block *nb, unsigned long event,
571 void *ptr)
572{
573 struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb);
574 struct ci_hdrc *ci = cbl->ci;
575
576 cbl->connected = event;
577 cbl->changed = true;
578
579 ci_irq(ci->irq, ci);
580 return NOTIFY_DONE;
581}
582
583static enum usb_role ci_usb_role_switch_get(struct usb_role_switch *sw)
584{
585 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw);
586 enum usb_role role;
587 unsigned long flags;
588
589 spin_lock_irqsave(&ci->lock, flags);
590 role = ci_role_to_usb_role(ci);
591 spin_unlock_irqrestore(&ci->lock, flags);
592
593 return role;
594}
595
596static int ci_usb_role_switch_set(struct usb_role_switch *sw,
597 enum usb_role role)
598{
599 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw);
600 struct ci_hdrc_cable *cable = NULL;
601 enum usb_role current_role = ci_role_to_usb_role(ci);
602 enum ci_role ci_role = usb_role_to_ci_role(role);
603 unsigned long flags;
604
605 if ((ci_role != CI_ROLE_END && !ci->roles[ci_role]) ||
606 (current_role == role))
607 return 0;
608
609 pm_runtime_get_sync(ci->dev);
610 /* Stop current role */
611 spin_lock_irqsave(&ci->lock, flags);
612 if (current_role == USB_ROLE_DEVICE)
613 cable = &ci->platdata->vbus_extcon;
614 else if (current_role == USB_ROLE_HOST)
615 cable = &ci->platdata->id_extcon;
616
617 if (cable) {
618 cable->changed = true;
619 cable->connected = false;
620 ci_irq(ci->irq, ci);
621 spin_unlock_irqrestore(&ci->lock, flags);
622 if (ci->wq && role != USB_ROLE_NONE)
623 flush_workqueue(ci->wq);
624 spin_lock_irqsave(&ci->lock, flags);
625 }
626
627 cable = NULL;
628
629 /* Start target role */
630 if (role == USB_ROLE_DEVICE)
631 cable = &ci->platdata->vbus_extcon;
632 else if (role == USB_ROLE_HOST)
633 cable = &ci->platdata->id_extcon;
634
635 if (cable) {
636 cable->changed = true;
637 cable->connected = true;
638 ci_irq(ci->irq, ci);
639 }
640 spin_unlock_irqrestore(&ci->lock, flags);
641 pm_runtime_put_sync(ci->dev);
642
643 return 0;
644}
645
646static struct usb_role_switch_desc ci_role_switch = {
647 .set = ci_usb_role_switch_set,
648 .get = ci_usb_role_switch_get,
649 .allow_userspace_control = true,
650};
651
652static int ci_get_platdata(struct device *dev,
653 struct ci_hdrc_platform_data *platdata)
654{
655 struct extcon_dev *ext_vbus, *ext_id;
656 struct ci_hdrc_cable *cable;
657 int ret;
658
659 if (!platdata->phy_mode)
660 platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
661
662 if (!platdata->dr_mode)
663 platdata->dr_mode = usb_get_dr_mode(dev);
664
665 if (platdata->dr_mode == USB_DR_MODE_UNKNOWN)
666 platdata->dr_mode = USB_DR_MODE_OTG;
667
668 if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) {
669 /* Get the vbus regulator */
670 platdata->reg_vbus = devm_regulator_get_optional(dev, "vbus");
671 if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) {
672 return -EPROBE_DEFER;
673 } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) {
674 /* no vbus regulator is needed */
675 platdata->reg_vbus = NULL;
676 } else if (IS_ERR(platdata->reg_vbus)) {
677 dev_err(dev, "Getting regulator error: %ld\n",
678 PTR_ERR(platdata->reg_vbus));
679 return PTR_ERR(platdata->reg_vbus);
680 }
681 /* Get TPL support */
682 if (!platdata->tpl_support)
683 platdata->tpl_support =
684 of_usb_host_tpl_support(dev->of_node);
685 }
686
687 if (platdata->dr_mode == USB_DR_MODE_OTG) {
688 /* We can support HNP and SRP of OTG 2.0 */
689 platdata->ci_otg_caps.otg_rev = 0x0200;
690 platdata->ci_otg_caps.hnp_support = true;
691 platdata->ci_otg_caps.srp_support = true;
692
693 /* Update otg capabilities by DT properties */
694 ret = of_usb_update_otg_caps(dev->of_node,
695 &platdata->ci_otg_caps);
696 if (ret)
697 return ret;
698 }
699
700 if (usb_get_maximum_speed(dev) == USB_SPEED_FULL)
701 platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
702
703 of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
704 &platdata->phy_clkgate_delay_us);
705
706 platdata->itc_setting = 1;
707
708 of_property_read_u32(dev->of_node, "itc-setting",
709 &platdata->itc_setting);
710
711 ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
712 &platdata->ahb_burst_config);
713 if (!ret) {
714 platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST;
715 } else if (ret != -EINVAL) {
716 dev_err(dev, "failed to get ahb-burst-config\n");
717 return ret;
718 }
719
720 ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword",
721 &platdata->tx_burst_size);
722 if (!ret) {
723 platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST;
724 } else if (ret != -EINVAL) {
725 dev_err(dev, "failed to get tx-burst-size-dword\n");
726 return ret;
727 }
728
729 ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword",
730 &platdata->rx_burst_size);
731 if (!ret) {
732 platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST;
733 } else if (ret != -EINVAL) {
734 dev_err(dev, "failed to get rx-burst-size-dword\n");
735 return ret;
736 }
737
738 if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL))
739 platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA;
740
741 ext_id = ERR_PTR(-ENODEV);
742 ext_vbus = ERR_PTR(-ENODEV);
743 if (of_property_read_bool(dev->of_node, "extcon")) {
744 /* Each one of them is not mandatory */
745 ext_vbus = extcon_get_edev_by_phandle(dev, 0);
746 if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
747 return PTR_ERR(ext_vbus);
748
749 ext_id = extcon_get_edev_by_phandle(dev, 1);
750 if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
751 return PTR_ERR(ext_id);
752 }
753
754 cable = &platdata->vbus_extcon;
755 cable->nb.notifier_call = ci_cable_notifier;
756 cable->edev = ext_vbus;
757
758 if (!IS_ERR(ext_vbus)) {
759 ret = extcon_get_state(cable->edev, EXTCON_USB);
760 if (ret)
761 cable->connected = true;
762 else
763 cable->connected = false;
764 }
765
766 cable = &platdata->id_extcon;
767 cable->nb.notifier_call = ci_cable_notifier;
768 cable->edev = ext_id;
769
770 if (!IS_ERR(ext_id)) {
771 ret = extcon_get_state(cable->edev, EXTCON_USB_HOST);
772 if (ret)
773 cable->connected = true;
774 else
775 cable->connected = false;
776 }
777
778 if (device_property_read_bool(dev, "usb-role-switch"))
779 ci_role_switch.fwnode = dev->fwnode;
780
781 platdata->pctl = devm_pinctrl_get(dev);
782 if (!IS_ERR(platdata->pctl)) {
783 struct pinctrl_state *p;
784
785 p = pinctrl_lookup_state(platdata->pctl, "default");
786 if (!IS_ERR(p))
787 platdata->pins_default = p;
788
789 p = pinctrl_lookup_state(platdata->pctl, "host");
790 if (!IS_ERR(p))
791 platdata->pins_host = p;
792
793 p = pinctrl_lookup_state(platdata->pctl, "device");
794 if (!IS_ERR(p))
795 platdata->pins_device = p;
796 }
797
798 if (!platdata->enter_lpm)
799 platdata->enter_lpm = ci_hdrc_enter_lpm_common;
800
801 return 0;
802}
803
804static int ci_extcon_register(struct ci_hdrc *ci)
805{
806 struct ci_hdrc_cable *id, *vbus;
807 int ret;
808
809 id = &ci->platdata->id_extcon;
810 id->ci = ci;
811 if (!IS_ERR_OR_NULL(id->edev)) {
812 ret = devm_extcon_register_notifier(ci->dev, id->edev,
813 EXTCON_USB_HOST, &id->nb);
814 if (ret < 0) {
815 dev_err(ci->dev, "register ID failed\n");
816 return ret;
817 }
818 }
819
820 vbus = &ci->platdata->vbus_extcon;
821 vbus->ci = ci;
822 if (!IS_ERR_OR_NULL(vbus->edev)) {
823 ret = devm_extcon_register_notifier(ci->dev, vbus->edev,
824 EXTCON_USB, &vbus->nb);
825 if (ret < 0) {
826 dev_err(ci->dev, "register VBUS failed\n");
827 return ret;
828 }
829 }
830
831 return 0;
832}
833
834static DEFINE_IDA(ci_ida);
835
836struct platform_device *ci_hdrc_add_device(struct device *dev,
837 struct resource *res, int nres,
838 struct ci_hdrc_platform_data *platdata)
839{
840 struct platform_device *pdev;
841 int id, ret;
842
843 ret = ci_get_platdata(dev, platdata);
844 if (ret)
845 return ERR_PTR(ret);
846
847 id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL);
848 if (id < 0)
849 return ERR_PTR(id);
850
851 pdev = platform_device_alloc("ci_hdrc", id);
852 if (!pdev) {
853 ret = -ENOMEM;
854 goto put_id;
855 }
856
857 pdev->dev.parent = dev;
858
859 ret = platform_device_add_resources(pdev, res, nres);
860 if (ret)
861 goto err;
862
863 ret = platform_device_add_data(pdev, platdata, sizeof(*platdata));
864 if (ret)
865 goto err;
866
867 ret = platform_device_add(pdev);
868 if (ret)
869 goto err;
870
871 return pdev;
872
873err:
874 platform_device_put(pdev);
875put_id:
876 ida_simple_remove(&ci_ida, id);
877 return ERR_PTR(ret);
878}
879EXPORT_SYMBOL_GPL(ci_hdrc_add_device);
880
881void ci_hdrc_remove_device(struct platform_device *pdev)
882{
883 int id = pdev->id;
884 platform_device_unregister(pdev);
885 ida_simple_remove(&ci_ida, id);
886}
887EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
888
889/**
890 * ci_hdrc_query_available_role: get runtime available operation mode
891 *
892 * The glue layer can get current operation mode (host/peripheral/otg)
893 * This function should be called after ci core device has created.
894 *
895 * @pdev: the platform device of ci core.
896 *
897 * Return runtime usb_dr_mode.
898 */
899enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev)
900{
901 struct ci_hdrc *ci = platform_get_drvdata(pdev);
902
903 if (!ci)
904 return USB_DR_MODE_UNKNOWN;
905 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])
906 return USB_DR_MODE_OTG;
907 else if (ci->roles[CI_ROLE_HOST])
908 return USB_DR_MODE_HOST;
909 else if (ci->roles[CI_ROLE_GADGET])
910 return USB_DR_MODE_PERIPHERAL;
911 else
912 return USB_DR_MODE_UNKNOWN;
913}
914EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role);
915
916static inline void ci_role_destroy(struct ci_hdrc *ci)
917{
918 ci_hdrc_gadget_destroy(ci);
919 ci_hdrc_host_destroy(ci);
920 if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
921 ci_hdrc_otg_destroy(ci);
922}
923
924static void ci_get_otg_capable(struct ci_hdrc *ci)
925{
926 if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG)
927 ci->is_otg = false;
928 else
929 ci->is_otg = (hw_read(ci, CAP_DCCPARAMS,
930 DCCPARAMS_DC | DCCPARAMS_HC)
931 == (DCCPARAMS_DC | DCCPARAMS_HC));
932 if (ci->is_otg) {
933 dev_dbg(ci->dev, "It is OTG capable controller\n");
934 /* Disable and clear all OTG irq */
935 hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
936 OTGSC_INT_STATUS_BITS);
937 }
938}
939
940static ssize_t role_show(struct device *dev, struct device_attribute *attr,
941 char *buf)
942{
943 struct ci_hdrc *ci = dev_get_drvdata(dev);
944
945 if (ci->role != CI_ROLE_END)
946 return sprintf(buf, "%s\n", ci_role(ci)->name);
947
948 return 0;
949}
950
951static ssize_t role_store(struct device *dev,
952 struct device_attribute *attr, const char *buf, size_t n)
953{
954 struct ci_hdrc *ci = dev_get_drvdata(dev);
955 enum ci_role role;
956 int ret;
957
958 if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) {
959 dev_warn(dev, "Current configuration is not dual-role, quit\n");
960 return -EPERM;
961 }
962
963 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
964 if (!strncmp(buf, ci->roles[role]->name,
965 strlen(ci->roles[role]->name)))
966 break;
967
968 if (role == CI_ROLE_END || role == ci->role)
969 return -EINVAL;
970
971 pm_runtime_get_sync(dev);
972 disable_irq(ci->irq);
973 ci_role_stop(ci);
974 ret = ci_role_start(ci, role);
975 if (!ret && ci->role == CI_ROLE_GADGET)
976 ci_handle_vbus_change(ci);
977 enable_irq(ci->irq);
978 pm_runtime_put_sync(dev);
979
980 return (ret == 0) ? n : ret;
981}
982static DEVICE_ATTR_RW(role);
983
984static struct attribute *ci_attrs[] = {
985 &dev_attr_role.attr,
986 NULL,
987};
988ATTRIBUTE_GROUPS(ci);
989
990static int ci_hdrc_probe(struct platform_device *pdev)
991{
992 struct device *dev = &pdev->dev;
993 struct ci_hdrc *ci;
994 struct resource *res;
995 void __iomem *base;
996 int ret;
997 enum usb_dr_mode dr_mode;
998
999 if (!dev_get_platdata(dev)) {
1000 dev_err(dev, "platform data missing\n");
1001 return -ENODEV;
1002 }
1003
1004 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1005 base = devm_ioremap_resource(dev, res);
1006 if (IS_ERR(base))
1007 return PTR_ERR(base);
1008
1009 ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL);
1010 if (!ci)
1011 return -ENOMEM;
1012
1013 spin_lock_init(&ci->lock);
1014 ci->dev = dev;
1015 ci->platdata = dev_get_platdata(dev);
1016 ci->imx28_write_fix = !!(ci->platdata->flags &
1017 CI_HDRC_IMX28_WRITE_FIX);
1018 ci->supports_runtime_pm = !!(ci->platdata->flags &
1019 CI_HDRC_SUPPORTS_RUNTIME_PM);
1020 platform_set_drvdata(pdev, ci);
1021
1022 ret = hw_device_init(ci, base);
1023 if (ret < 0) {
1024 dev_err(dev, "can't initialize hardware\n");
1025 return -ENODEV;
1026 }
1027
1028 ret = ci_ulpi_init(ci);
1029 if (ret)
1030 return ret;
1031
1032 if (ci->platdata->phy) {
1033 ci->phy = ci->platdata->phy;
1034 } else if (ci->platdata->usb_phy) {
1035 ci->usb_phy = ci->platdata->usb_phy;
1036 } else {
1037 /* Look for a generic PHY first */
1038 ci->phy = devm_phy_get(dev->parent, "usb-phy");
1039
1040 if (PTR_ERR(ci->phy) == -EPROBE_DEFER) {
1041 ret = -EPROBE_DEFER;
1042 goto ulpi_exit;
1043 } else if (IS_ERR(ci->phy)) {
1044 ci->phy = NULL;
1045 }
1046
1047 /* Look for a legacy USB PHY from device-tree next */
1048 if (!ci->phy) {
1049 ci->usb_phy = devm_usb_get_phy_by_phandle(dev->parent,
1050 "phys", 0);
1051
1052 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) {
1053 ret = -EPROBE_DEFER;
1054 goto ulpi_exit;
1055 } else if (IS_ERR(ci->usb_phy)) {
1056 ci->usb_phy = NULL;
1057 }
1058 }
1059
1060 /* Look for any registered legacy USB PHY as last resort */
1061 if (!ci->phy && !ci->usb_phy) {
1062 ci->usb_phy = devm_usb_get_phy(dev->parent,
1063 USB_PHY_TYPE_USB2);
1064
1065 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) {
1066 ret = -EPROBE_DEFER;
1067 goto ulpi_exit;
1068 } else if (IS_ERR(ci->usb_phy)) {
1069 ci->usb_phy = NULL;
1070 }
1071 }
1072
1073 /* No USB PHY was found in the end */
1074 if (!ci->phy && !ci->usb_phy) {
1075 ret = -ENXIO;
1076 goto ulpi_exit;
1077 }
1078 }
1079
1080 ret = ci_usb_phy_init(ci);
1081 if (ret) {
1082 dev_err(dev, "unable to init phy: %d\n", ret);
1083 return ret;
1084 }
1085
1086 ci->hw_bank.phys = res->start;
1087
1088 ci->irq = platform_get_irq(pdev, 0);
1089 if (ci->irq < 0) {
1090 ret = ci->irq;
1091 goto deinit_phy;
1092 }
1093
1094 ci_get_otg_capable(ci);
1095
1096 dr_mode = ci->platdata->dr_mode;
1097 /* initialize role(s) before the interrupt is requested */
1098 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) {
1099 ret = ci_hdrc_host_init(ci);
1100 if (ret) {
1101 if (ret == -ENXIO)
1102 dev_info(dev, "doesn't support host\n");
1103 else
1104 goto deinit_phy;
1105 }
1106 }
1107
1108 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
1109 ret = ci_hdrc_gadget_init(ci);
1110 if (ret) {
1111 if (ret == -ENXIO)
1112 dev_info(dev, "doesn't support gadget\n");
1113 else
1114 goto deinit_host;
1115 }
1116 }
1117
1118 if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) {
1119 dev_err(dev, "no supported roles\n");
1120 ret = -ENODEV;
1121 goto deinit_gadget;
1122 }
1123
1124 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) {
1125 ret = ci_hdrc_otg_init(ci);
1126 if (ret) {
1127 dev_err(dev, "init otg fails, ret = %d\n", ret);
1128 goto deinit_gadget;
1129 }
1130 }
1131
1132 if (ci_role_switch.fwnode) {
1133 ci_role_switch.driver_data = ci;
1134 ci->role_switch = usb_role_switch_register(dev,
1135 &ci_role_switch);
1136 if (IS_ERR(ci->role_switch)) {
1137 ret = PTR_ERR(ci->role_switch);
1138 goto deinit_otg;
1139 }
1140 }
1141
1142 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
1143 if (ci->is_otg) {
1144 ci->role = ci_otg_role(ci);
1145 /* Enable ID change irq */
1146 hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE);
1147 } else {
1148 /*
1149 * If the controller is not OTG capable, but support
1150 * role switch, the defalt role is gadget, and the
1151 * user can switch it through debugfs.
1152 */
1153 ci->role = CI_ROLE_GADGET;
1154 }
1155 } else {
1156 ci->role = ci->roles[CI_ROLE_HOST]
1157 ? CI_ROLE_HOST
1158 : CI_ROLE_GADGET;
1159 }
1160
1161 if (!ci_otg_is_fsm_mode(ci)) {
1162 /* only update vbus status for peripheral */
1163 if (ci->role == CI_ROLE_GADGET) {
1164 /* Pull down DP for possible charger detection */
1165 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
1166 ci_handle_vbus_change(ci);
1167 }
1168
1169 ret = ci_role_start(ci, ci->role);
1170 if (ret) {
1171 dev_err(dev, "can't start %s role\n",
1172 ci_role(ci)->name);
1173 goto stop;
1174 }
1175 }
1176
1177 ret = devm_request_irq(dev, ci->irq, ci_irq, IRQF_SHARED,
1178 ci->platdata->name, ci);
1179 if (ret)
1180 goto stop;
1181
1182 ret = ci_extcon_register(ci);
1183 if (ret)
1184 goto stop;
1185
1186 if (ci->supports_runtime_pm) {
1187 pm_runtime_set_active(&pdev->dev);
1188 pm_runtime_enable(&pdev->dev);
1189 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
1190 pm_runtime_mark_last_busy(ci->dev);
1191 pm_runtime_use_autosuspend(&pdev->dev);
1192 }
1193
1194 if (ci_otg_is_fsm_mode(ci))
1195 ci_hdrc_otg_fsm_start(ci);
1196
1197 device_set_wakeup_capable(&pdev->dev, true);
1198 dbg_create_files(ci);
1199
1200 return 0;
1201
1202stop:
1203 if (ci->role_switch)
1204 usb_role_switch_unregister(ci->role_switch);
1205deinit_otg:
1206 if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
1207 ci_hdrc_otg_destroy(ci);
1208deinit_gadget:
1209 ci_hdrc_gadget_destroy(ci);
1210deinit_host:
1211 ci_hdrc_host_destroy(ci);
1212deinit_phy:
1213 ci_usb_phy_exit(ci);
1214ulpi_exit:
1215 ci_ulpi_exit(ci);
1216
1217 return ret;
1218}
1219
1220static int ci_hdrc_remove(struct platform_device *pdev)
1221{
1222 struct ci_hdrc *ci = platform_get_drvdata(pdev);
1223
1224 if (ci->role_switch)
1225 usb_role_switch_unregister(ci->role_switch);
1226
1227 if (ci->supports_runtime_pm) {
1228 pm_runtime_get_sync(&pdev->dev);
1229 pm_runtime_disable(&pdev->dev);
1230 pm_runtime_put_noidle(&pdev->dev);
1231 }
1232
1233 dbg_remove_files(ci);
1234 ci_role_destroy(ci);
1235 ci_hdrc_enter_lpm(ci, true);
1236 ci_usb_phy_exit(ci);
1237 ci_ulpi_exit(ci);
1238
1239 return 0;
1240}
1241
1242#ifdef CONFIG_PM
1243/* Prepare wakeup by SRP before suspend */
1244static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci)
1245{
1246 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
1247 !hw_read_otgsc(ci, OTGSC_ID)) {
1248 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP,
1249 PORTSC_PP);
1250 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN,
1251 PORTSC_WKCN);
1252 }
1253}
1254
1255/* Handle SRP when wakeup by data pulse */
1256static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci)
1257{
1258 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
1259 (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) {
1260 if (!hw_read_otgsc(ci, OTGSC_ID)) {
1261 ci->fsm.a_srp_det = 1;
1262 ci->fsm.a_bus_drop = 0;
1263 } else {
1264 ci->fsm.id = 1;
1265 }
1266 ci_otg_queue_work(ci);
1267 }
1268}
1269
1270static void ci_controller_suspend(struct ci_hdrc *ci)
1271{
1272 disable_irq(ci->irq);
1273 ci_hdrc_enter_lpm(ci, true);
1274 if (ci->platdata->phy_clkgate_delay_us)
1275 usleep_range(ci->platdata->phy_clkgate_delay_us,
1276 ci->platdata->phy_clkgate_delay_us + 50);
1277 usb_phy_set_suspend(ci->usb_phy, 1);
1278 ci->in_lpm = true;
1279 enable_irq(ci->irq);
1280}
1281
1282/*
1283 * Handle the wakeup interrupt triggered by extcon connector
1284 * We need to call ci_irq again for extcon since the first
1285 * interrupt (wakeup int) only let the controller be out of
1286 * low power mode, but not handle any interrupts.
1287 */
1288static void ci_extcon_wakeup_int(struct ci_hdrc *ci)
1289{
1290 struct ci_hdrc_cable *cable_id, *cable_vbus;
1291 u32 otgsc = hw_read_otgsc(ci, ~0);
1292
1293 cable_id = &ci->platdata->id_extcon;
1294 cable_vbus = &ci->platdata->vbus_extcon;
1295
1296 if (!IS_ERR(cable_id->edev) && ci->is_otg &&
1297 (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS))
1298 ci_irq(ci->irq, ci);
1299
1300 if (!IS_ERR(cable_vbus->edev) && ci->is_otg &&
1301 (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS))
1302 ci_irq(ci->irq, ci);
1303}
1304
1305static int ci_controller_resume(struct device *dev)
1306{
1307 struct ci_hdrc *ci = dev_get_drvdata(dev);
1308 int ret;
1309
1310 dev_dbg(dev, "at %s\n", __func__);
1311
1312 if (!ci->in_lpm) {
1313 WARN_ON(1);
1314 return 0;
1315 }
1316
1317 ci_hdrc_enter_lpm(ci, false);
1318
1319 ret = ci_ulpi_resume(ci);
1320 if (ret)
1321 return ret;
1322
1323 if (ci->usb_phy) {
1324 usb_phy_set_suspend(ci->usb_phy, 0);
1325 usb_phy_set_wakeup(ci->usb_phy, false);
1326 hw_wait_phy_stable();
1327 }
1328
1329 ci->in_lpm = false;
1330 if (ci->wakeup_int) {
1331 ci->wakeup_int = false;
1332 pm_runtime_mark_last_busy(ci->dev);
1333 pm_runtime_put_autosuspend(ci->dev);
1334 enable_irq(ci->irq);
1335 if (ci_otg_is_fsm_mode(ci))
1336 ci_otg_fsm_wakeup_by_srp(ci);
1337 ci_extcon_wakeup_int(ci);
1338 }
1339
1340 return 0;
1341}
1342
1343#ifdef CONFIG_PM_SLEEP
1344static int ci_suspend(struct device *dev)
1345{
1346 struct ci_hdrc *ci = dev_get_drvdata(dev);
1347
1348 if (ci->wq)
1349 flush_workqueue(ci->wq);
1350 /*
1351 * Controller needs to be active during suspend, otherwise the core
1352 * may run resume when the parent is at suspend if other driver's
1353 * suspend fails, it occurs before parent's suspend has not started,
1354 * but the core suspend has finished.
1355 */
1356 if (ci->in_lpm)
1357 pm_runtime_resume(dev);
1358
1359 if (ci->in_lpm) {
1360 WARN_ON(1);
1361 return 0;
1362 }
1363
1364 if (device_may_wakeup(dev)) {
1365 if (ci_otg_is_fsm_mode(ci))
1366 ci_otg_fsm_suspend_for_srp(ci);
1367
1368 usb_phy_set_wakeup(ci->usb_phy, true);
1369 enable_irq_wake(ci->irq);
1370 }
1371
1372 ci_controller_suspend(ci);
1373
1374 return 0;
1375}
1376
1377static int ci_resume(struct device *dev)
1378{
1379 struct ci_hdrc *ci = dev_get_drvdata(dev);
1380 int ret;
1381
1382 if (device_may_wakeup(dev))
1383 disable_irq_wake(ci->irq);
1384
1385 ret = ci_controller_resume(dev);
1386 if (ret)
1387 return ret;
1388
1389 if (ci->supports_runtime_pm) {
1390 pm_runtime_disable(dev);
1391 pm_runtime_set_active(dev);
1392 pm_runtime_enable(dev);
1393 }
1394
1395 return ret;
1396}
1397#endif /* CONFIG_PM_SLEEP */
1398
1399static int ci_runtime_suspend(struct device *dev)
1400{
1401 struct ci_hdrc *ci = dev_get_drvdata(dev);
1402
1403 dev_dbg(dev, "at %s\n", __func__);
1404
1405 if (ci->in_lpm) {
1406 WARN_ON(1);
1407 return 0;
1408 }
1409
1410 if (ci_otg_is_fsm_mode(ci))
1411 ci_otg_fsm_suspend_for_srp(ci);
1412
1413 usb_phy_set_wakeup(ci->usb_phy, true);
1414 ci_controller_suspend(ci);
1415
1416 return 0;
1417}
1418
1419static int ci_runtime_resume(struct device *dev)
1420{
1421 return ci_controller_resume(dev);
1422}
1423
1424#endif /* CONFIG_PM */
1425static const struct dev_pm_ops ci_pm_ops = {
1426 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume)
1427 SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL)
1428};
1429
1430static struct platform_driver ci_hdrc_driver = {
1431 .probe = ci_hdrc_probe,
1432 .remove = ci_hdrc_remove,
1433 .driver = {
1434 .name = "ci_hdrc",
1435 .pm = &ci_pm_ops,
1436 .dev_groups = ci_groups,
1437 },
1438};
1439
1440static int __init ci_hdrc_platform_register(void)
1441{
1442 ci_hdrc_host_driver_init();
1443 return platform_driver_register(&ci_hdrc_driver);
1444}
1445module_init(ci_hdrc_platform_register);
1446
1447static void __exit ci_hdrc_platform_unregister(void)
1448{
1449 platform_driver_unregister(&ci_hdrc_driver);
1450}
1451module_exit(ci_hdrc_platform_unregister);
1452
1453MODULE_ALIAS("platform:ci_hdrc");
1454MODULE_LICENSE("GPL v2");
1455MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
1456MODULE_DESCRIPTION("ChipIdea HDRC Driver");