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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_FRINDEX] = 0x0CU,
57 [OP_DEVICEADDR] = 0x14U,
58 [OP_ENDPTLISTADDR] = 0x18U,
59 [OP_TTCTRL] = 0x1CU,
60 [OP_BURSTSIZE] = 0x20U,
61 [OP_ULPI_VIEWPORT] = 0x30U,
62 [OP_PORTSC] = 0x44U,
63 [OP_DEVLC] = 0x84U,
64 [OP_OTGSC] = 0x64U,
65 [OP_USBMODE] = 0x68U,
66 [OP_ENDPTSETUPSTAT] = 0x6CU,
67 [OP_ENDPTPRIME] = 0x70U,
68 [OP_ENDPTFLUSH] = 0x74U,
69 [OP_ENDPTSTAT] = 0x78U,
70 [OP_ENDPTCOMPLETE] = 0x7CU,
71 [OP_ENDPTCTRL] = 0x80U,
72};
73
74static const u8 ci_regs_lpm[] = {
75 [CAP_CAPLENGTH] = 0x00U,
76 [CAP_HCCPARAMS] = 0x08U,
77 [CAP_DCCPARAMS] = 0x24U,
78 [CAP_TESTMODE] = 0xFCU,
79 [OP_USBCMD] = 0x00U,
80 [OP_USBSTS] = 0x04U,
81 [OP_USBINTR] = 0x08U,
82 [OP_FRINDEX] = 0x0CU,
83 [OP_DEVICEADDR] = 0x14U,
84 [OP_ENDPTLISTADDR] = 0x18U,
85 [OP_TTCTRL] = 0x1CU,
86 [OP_BURSTSIZE] = 0x20U,
87 [OP_ULPI_VIEWPORT] = 0x30U,
88 [OP_PORTSC] = 0x44U,
89 [OP_DEVLC] = 0x84U,
90 [OP_OTGSC] = 0xC4U,
91 [OP_USBMODE] = 0xC8U,
92 [OP_ENDPTSETUPSTAT] = 0xD8U,
93 [OP_ENDPTPRIME] = 0xDCU,
94 [OP_ENDPTFLUSH] = 0xE0U,
95 [OP_ENDPTSTAT] = 0xE4U,
96 [OP_ENDPTCOMPLETE] = 0xE8U,
97 [OP_ENDPTCTRL] = 0xECU,
98};
99
100static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm)
101{
102 int i;
103
104 for (i = 0; i < OP_ENDPTCTRL; i++)
105 ci->hw_bank.regmap[i] =
106 (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) +
107 (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
108
109 for (; i <= OP_LAST; i++)
110 ci->hw_bank.regmap[i] = ci->hw_bank.op +
111 4 * (i - OP_ENDPTCTRL) +
112 (is_lpm
113 ? ci_regs_lpm[OP_ENDPTCTRL]
114 : ci_regs_nolpm[OP_ENDPTCTRL]);
115
116}
117
118static enum ci_revision ci_get_revision(struct ci_hdrc *ci)
119{
120 int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION);
121 enum ci_revision rev = CI_REVISION_UNKNOWN;
122
123 if (ver == 0x2) {
124 rev = hw_read_id_reg(ci, ID_ID, REVISION)
125 >> __ffs(REVISION);
126 rev += CI_REVISION_20;
127 } else if (ver == 0x0) {
128 rev = CI_REVISION_1X;
129 }
130
131 return rev;
132}
133
134/**
135 * hw_read_intr_enable: returns interrupt enable register
136 *
137 * @ci: the controller
138 *
139 * This function returns register data
140 */
141u32 hw_read_intr_enable(struct ci_hdrc *ci)
142{
143 return hw_read(ci, OP_USBINTR, ~0);
144}
145
146/**
147 * hw_read_intr_status: returns interrupt status register
148 *
149 * @ci: the controller
150 *
151 * This function returns register data
152 */
153u32 hw_read_intr_status(struct ci_hdrc *ci)
154{
155 return hw_read(ci, OP_USBSTS, ~0);
156}
157
158/**
159 * hw_port_test_set: writes port test mode (execute without interruption)
160 * @ci: the controller
161 * @mode: new value
162 *
163 * This function returns an error code
164 */
165int hw_port_test_set(struct ci_hdrc *ci, u8 mode)
166{
167 const u8 TEST_MODE_MAX = 7;
168
169 if (mode > TEST_MODE_MAX)
170 return -EINVAL;
171
172 hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC));
173 return 0;
174}
175
176/**
177 * hw_port_test_get: reads port test mode value
178 *
179 * @ci: the controller
180 *
181 * This function returns port test mode value
182 */
183u8 hw_port_test_get(struct ci_hdrc *ci)
184{
185 return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC);
186}
187
188static void hw_wait_phy_stable(void)
189{
190 /*
191 * The phy needs some delay to output the stable status from low
192 * power mode. And for OTGSC, the status inputs are debounced
193 * using a 1 ms time constant, so, delay 2ms for controller to get
194 * the stable status, like vbus and id when the phy leaves low power.
195 */
196 usleep_range(2000, 2500);
197}
198
199/* The PHY enters/leaves low power mode */
200static void ci_hdrc_enter_lpm_common(struct ci_hdrc *ci, bool enable)
201{
202 enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC;
203 bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm)));
204
205 if (enable && !lpm)
206 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
207 PORTSC_PHCD(ci->hw_bank.lpm));
208 else if (!enable && lpm)
209 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
210 0);
211}
212
213static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable)
214{
215 return ci->platdata->enter_lpm(ci, enable);
216}
217
218static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
219{
220 u32 reg;
221
222 /* bank is a module variable */
223 ci->hw_bank.abs = base;
224
225 ci->hw_bank.cap = ci->hw_bank.abs;
226 ci->hw_bank.cap += ci->platdata->capoffset;
227 ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff);
228
229 hw_alloc_regmap(ci, false);
230 reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
231 __ffs(HCCPARAMS_LEN);
232 ci->hw_bank.lpm = reg;
233 if (reg)
234 hw_alloc_regmap(ci, !!reg);
235 ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs;
236 ci->hw_bank.size += OP_LAST;
237 ci->hw_bank.size /= sizeof(u32);
238
239 reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
240 __ffs(DCCPARAMS_DEN);
241 ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
242
243 if (ci->hw_ep_max > ENDPT_MAX)
244 return -ENODEV;
245
246 ci_hdrc_enter_lpm(ci, false);
247
248 /* Disable all interrupts bits */
249 hw_write(ci, OP_USBINTR, 0xffffffff, 0);
250
251 /* Clear all interrupts status bits*/
252 hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff);
253
254 ci->rev = ci_get_revision(ci);
255
256 dev_dbg(ci->dev,
257 "revision: %d, lpm: %d; cap: %px op: %px\n",
258 ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op);
259
260 /* setup lock mode ? */
261
262 /* ENDPTSETUPSTAT is '0' by default */
263
264 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
265
266 return 0;
267}
268
269void hw_phymode_configure(struct ci_hdrc *ci)
270{
271 u32 portsc, lpm, sts = 0;
272
273 switch (ci->platdata->phy_mode) {
274 case USBPHY_INTERFACE_MODE_UTMI:
275 portsc = PORTSC_PTS(PTS_UTMI);
276 lpm = DEVLC_PTS(PTS_UTMI);
277 break;
278 case USBPHY_INTERFACE_MODE_UTMIW:
279 portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW;
280 lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW;
281 break;
282 case USBPHY_INTERFACE_MODE_ULPI:
283 portsc = PORTSC_PTS(PTS_ULPI);
284 lpm = DEVLC_PTS(PTS_ULPI);
285 break;
286 case USBPHY_INTERFACE_MODE_SERIAL:
287 portsc = PORTSC_PTS(PTS_SERIAL);
288 lpm = DEVLC_PTS(PTS_SERIAL);
289 sts = 1;
290 break;
291 case USBPHY_INTERFACE_MODE_HSIC:
292 portsc = PORTSC_PTS(PTS_HSIC);
293 lpm = DEVLC_PTS(PTS_HSIC);
294 break;
295 default:
296 return;
297 }
298
299 if (ci->hw_bank.lpm) {
300 hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm);
301 if (sts)
302 hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS);
303 } else {
304 hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc);
305 if (sts)
306 hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
307 }
308}
309EXPORT_SYMBOL_GPL(hw_phymode_configure);
310
311/**
312 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
313 * interfaces
314 * @ci: the controller
315 *
316 * This function returns an error code if the phy failed to init
317 */
318static int _ci_usb_phy_init(struct ci_hdrc *ci)
319{
320 int ret;
321
322 if (ci->phy) {
323 ret = phy_init(ci->phy);
324 if (ret)
325 return ret;
326
327 ret = phy_power_on(ci->phy);
328 if (ret) {
329 phy_exit(ci->phy);
330 return ret;
331 }
332 } else {
333 ret = usb_phy_init(ci->usb_phy);
334 }
335
336 return ret;
337}
338
339/**
340 * ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy
341 * interfaces
342 * @ci: the controller
343 */
344static void ci_usb_phy_exit(struct ci_hdrc *ci)
345{
346 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
347 return;
348
349 if (ci->phy) {
350 phy_power_off(ci->phy);
351 phy_exit(ci->phy);
352 } else {
353 usb_phy_shutdown(ci->usb_phy);
354 }
355}
356
357/**
358 * ci_usb_phy_init: initialize phy according to different phy type
359 * @ci: the controller
360 *
361 * This function returns an error code if usb_phy_init has failed
362 */
363static int ci_usb_phy_init(struct ci_hdrc *ci)
364{
365 int ret;
366
367 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
368 return 0;
369
370 switch (ci->platdata->phy_mode) {
371 case USBPHY_INTERFACE_MODE_UTMI:
372 case USBPHY_INTERFACE_MODE_UTMIW:
373 case USBPHY_INTERFACE_MODE_HSIC:
374 ret = _ci_usb_phy_init(ci);
375 if (!ret)
376 hw_wait_phy_stable();
377 else
378 return ret;
379 hw_phymode_configure(ci);
380 break;
381 case USBPHY_INTERFACE_MODE_ULPI:
382 case USBPHY_INTERFACE_MODE_SERIAL:
383 hw_phymode_configure(ci);
384 ret = _ci_usb_phy_init(ci);
385 if (ret)
386 return ret;
387 break;
388 default:
389 ret = _ci_usb_phy_init(ci);
390 if (!ret)
391 hw_wait_phy_stable();
392 }
393
394 return ret;
395}
396
397
398/**
399 * ci_platform_configure: do controller configure
400 * @ci: the controller
401 *
402 */
403void ci_platform_configure(struct ci_hdrc *ci)
404{
405 bool is_device_mode, is_host_mode;
406
407 is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC;
408 is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC;
409
410 if (is_device_mode) {
411 phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
412
413 if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING)
414 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
415 USBMODE_CI_SDIS);
416 }
417
418 if (is_host_mode) {
419 phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
420
421 if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
422 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
423 USBMODE_CI_SDIS);
424 }
425
426 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
427 if (ci->hw_bank.lpm)
428 hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
429 else
430 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
431 }
432
433 if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA)
434 hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA);
435
436 hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16);
437
438 if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST)
439 hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK,
440 ci->platdata->ahb_burst_config);
441
442 /* override burst size, take effect only when ahb_burst_config is 0 */
443 if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) {
444 if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST)
445 hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK,
446 ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK));
447
448 if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST)
449 hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK,
450 ci->platdata->rx_burst_size);
451 }
452}
453
454/**
455 * hw_controller_reset: do controller reset
456 * @ci: the controller
457 *
458 * This function returns an error code
459 */
460static int hw_controller_reset(struct ci_hdrc *ci)
461{
462 int count = 0;
463
464 hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST);
465 while (hw_read(ci, OP_USBCMD, USBCMD_RST)) {
466 udelay(10);
467 if (count++ > 1000)
468 return -ETIMEDOUT;
469 }
470
471 return 0;
472}
473
474/**
475 * hw_device_reset: resets chip (execute without interruption)
476 * @ci: the controller
477 *
478 * This function returns an error code
479 */
480int hw_device_reset(struct ci_hdrc *ci)
481{
482 int ret;
483
484 /* should flush & stop before reset */
485 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
486 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
487
488 ret = hw_controller_reset(ci);
489 if (ret) {
490 dev_err(ci->dev, "error resetting controller, ret=%d\n", ret);
491 return ret;
492 }
493
494 if (ci->platdata->notify_event) {
495 ret = ci->platdata->notify_event(ci,
496 CI_HDRC_CONTROLLER_RESET_EVENT);
497 if (ret)
498 return ret;
499 }
500
501 /* USBMODE should be configured step by step */
502 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
503 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC);
504 /* HW >= 2.3 */
505 hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
506
507 if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) {
508 dev_err(ci->dev, "cannot enter in %s device mode\n",
509 ci_role(ci)->name);
510 dev_err(ci->dev, "lpm = %i\n", ci->hw_bank.lpm);
511 return -ENODEV;
512 }
513
514 ci_platform_configure(ci);
515
516 return 0;
517}
518
519static irqreturn_t ci_irq_handler(int irq, void *data)
520{
521 struct ci_hdrc *ci = data;
522 irqreturn_t ret = IRQ_NONE;
523 u32 otgsc = 0;
524
525 if (ci->in_lpm) {
526 /*
527 * If we already have a wakeup irq pending there,
528 * let's just return to wait resume finished firstly.
529 */
530 if (ci->wakeup_int)
531 return IRQ_HANDLED;
532
533 disable_irq_nosync(irq);
534 ci->wakeup_int = true;
535 pm_runtime_get(ci->dev);
536 return IRQ_HANDLED;
537 }
538
539 if (ci->is_otg) {
540 otgsc = hw_read_otgsc(ci, ~0);
541 if (ci_otg_is_fsm_mode(ci)) {
542 ret = ci_otg_fsm_irq(ci);
543 if (ret == IRQ_HANDLED)
544 return ret;
545 }
546 }
547
548 /*
549 * Handle id change interrupt, it indicates device/host function
550 * switch.
551 */
552 if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) {
553 ci->id_event = true;
554 /* Clear ID change irq status */
555 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS);
556 ci_otg_queue_work(ci);
557 return IRQ_HANDLED;
558 }
559
560 /*
561 * Handle vbus change interrupt, it indicates device connection
562 * and disconnection events.
563 */
564 if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) {
565 ci->b_sess_valid_event = true;
566 /* Clear BSV irq */
567 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS);
568 ci_otg_queue_work(ci);
569 return IRQ_HANDLED;
570 }
571
572 /* Handle device/host interrupt */
573 if (ci->role != CI_ROLE_END)
574 ret = ci_role(ci)->irq(ci);
575
576 return ret;
577}
578
579static void ci_irq(struct ci_hdrc *ci)
580{
581 unsigned long flags;
582
583 local_irq_save(flags);
584 ci_irq_handler(ci->irq, ci);
585 local_irq_restore(flags);
586}
587
588static int ci_cable_notifier(struct notifier_block *nb, unsigned long event,
589 void *ptr)
590{
591 struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb);
592 struct ci_hdrc *ci = cbl->ci;
593
594 cbl->connected = event;
595 cbl->changed = true;
596
597 ci_irq(ci);
598 return NOTIFY_DONE;
599}
600
601static enum usb_role ci_usb_role_switch_get(struct usb_role_switch *sw)
602{
603 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw);
604 enum usb_role role;
605 unsigned long flags;
606
607 spin_lock_irqsave(&ci->lock, flags);
608 role = ci_role_to_usb_role(ci);
609 spin_unlock_irqrestore(&ci->lock, flags);
610
611 return role;
612}
613
614static int ci_usb_role_switch_set(struct usb_role_switch *sw,
615 enum usb_role role)
616{
617 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw);
618 struct ci_hdrc_cable *cable;
619
620 if (role == USB_ROLE_HOST) {
621 cable = &ci->platdata->id_extcon;
622 cable->changed = true;
623 cable->connected = true;
624 cable = &ci->platdata->vbus_extcon;
625 cable->changed = true;
626 cable->connected = false;
627 } else if (role == USB_ROLE_DEVICE) {
628 cable = &ci->platdata->id_extcon;
629 cable->changed = true;
630 cable->connected = false;
631 cable = &ci->platdata->vbus_extcon;
632 cable->changed = true;
633 cable->connected = true;
634 } else {
635 cable = &ci->platdata->id_extcon;
636 cable->changed = true;
637 cable->connected = false;
638 cable = &ci->platdata->vbus_extcon;
639 cable->changed = true;
640 cable->connected = false;
641 }
642
643 ci_irq(ci);
644 return 0;
645}
646
647static enum ci_role ci_get_role(struct ci_hdrc *ci)
648{
649 enum ci_role role;
650
651 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
652 if (ci->is_otg) {
653 role = ci_otg_role(ci);
654 hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE);
655 } else {
656 /*
657 * If the controller is not OTG capable, but support
658 * role switch, the defalt role is gadget, and the
659 * user can switch it through debugfs.
660 */
661 role = CI_ROLE_GADGET;
662 }
663 } else {
664 role = ci->roles[CI_ROLE_HOST] ? CI_ROLE_HOST
665 : CI_ROLE_GADGET;
666 }
667
668 return role;
669}
670
671static struct usb_role_switch_desc ci_role_switch = {
672 .set = ci_usb_role_switch_set,
673 .get = ci_usb_role_switch_get,
674 .allow_userspace_control = true,
675};
676
677static int ci_get_platdata(struct device *dev,
678 struct ci_hdrc_platform_data *platdata)
679{
680 struct extcon_dev *ext_vbus, *ext_id;
681 struct ci_hdrc_cable *cable;
682 int ret;
683
684 if (!platdata->phy_mode)
685 platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
686
687 if (!platdata->dr_mode)
688 platdata->dr_mode = usb_get_dr_mode(dev);
689
690 if (platdata->dr_mode == USB_DR_MODE_UNKNOWN)
691 platdata->dr_mode = USB_DR_MODE_OTG;
692
693 if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) {
694 /* Get the vbus regulator */
695 platdata->reg_vbus = devm_regulator_get_optional(dev, "vbus");
696 if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) {
697 return -EPROBE_DEFER;
698 } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) {
699 /* no vbus regulator is needed */
700 platdata->reg_vbus = NULL;
701 } else if (IS_ERR(platdata->reg_vbus)) {
702 dev_err(dev, "Getting regulator error: %ld\n",
703 PTR_ERR(platdata->reg_vbus));
704 return PTR_ERR(platdata->reg_vbus);
705 }
706 /* Get TPL support */
707 if (!platdata->tpl_support)
708 platdata->tpl_support =
709 of_usb_host_tpl_support(dev->of_node);
710 }
711
712 if (platdata->dr_mode == USB_DR_MODE_OTG) {
713 /* We can support HNP and SRP of OTG 2.0 */
714 platdata->ci_otg_caps.otg_rev = 0x0200;
715 platdata->ci_otg_caps.hnp_support = true;
716 platdata->ci_otg_caps.srp_support = true;
717
718 /* Update otg capabilities by DT properties */
719 ret = of_usb_update_otg_caps(dev->of_node,
720 &platdata->ci_otg_caps);
721 if (ret)
722 return ret;
723 }
724
725 if (usb_get_maximum_speed(dev) == USB_SPEED_FULL)
726 platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
727
728 of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
729 &platdata->phy_clkgate_delay_us);
730
731 platdata->itc_setting = 1;
732
733 of_property_read_u32(dev->of_node, "itc-setting",
734 &platdata->itc_setting);
735
736 ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
737 &platdata->ahb_burst_config);
738 if (!ret) {
739 platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST;
740 } else if (ret != -EINVAL) {
741 dev_err(dev, "failed to get ahb-burst-config\n");
742 return ret;
743 }
744
745 ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword",
746 &platdata->tx_burst_size);
747 if (!ret) {
748 platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST;
749 } else if (ret != -EINVAL) {
750 dev_err(dev, "failed to get tx-burst-size-dword\n");
751 return ret;
752 }
753
754 ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword",
755 &platdata->rx_burst_size);
756 if (!ret) {
757 platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST;
758 } else if (ret != -EINVAL) {
759 dev_err(dev, "failed to get rx-burst-size-dword\n");
760 return ret;
761 }
762
763 if (of_property_read_bool(dev->of_node, "non-zero-ttctrl-ttha"))
764 platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA;
765
766 ext_id = ERR_PTR(-ENODEV);
767 ext_vbus = ERR_PTR(-ENODEV);
768 if (of_property_present(dev->of_node, "extcon")) {
769 /* Each one of them is not mandatory */
770 ext_vbus = extcon_get_edev_by_phandle(dev, 0);
771 if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
772 return PTR_ERR(ext_vbus);
773
774 ext_id = extcon_get_edev_by_phandle(dev, 1);
775 if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
776 return PTR_ERR(ext_id);
777 }
778
779 cable = &platdata->vbus_extcon;
780 cable->nb.notifier_call = ci_cable_notifier;
781 cable->edev = ext_vbus;
782
783 if (!IS_ERR(ext_vbus)) {
784 ret = extcon_get_state(cable->edev, EXTCON_USB);
785 if (ret)
786 cable->connected = true;
787 else
788 cable->connected = false;
789 }
790
791 cable = &platdata->id_extcon;
792 cable->nb.notifier_call = ci_cable_notifier;
793 cable->edev = ext_id;
794
795 if (!IS_ERR(ext_id)) {
796 ret = extcon_get_state(cable->edev, EXTCON_USB_HOST);
797 if (ret)
798 cable->connected = true;
799 else
800 cable->connected = false;
801 }
802
803 if (device_property_read_bool(dev, "usb-role-switch"))
804 ci_role_switch.fwnode = dev->fwnode;
805
806 platdata->pctl = devm_pinctrl_get(dev);
807 if (!IS_ERR(platdata->pctl)) {
808 struct pinctrl_state *p;
809
810 p = pinctrl_lookup_state(platdata->pctl, "default");
811 if (!IS_ERR(p))
812 platdata->pins_default = p;
813
814 p = pinctrl_lookup_state(platdata->pctl, "host");
815 if (!IS_ERR(p))
816 platdata->pins_host = p;
817
818 p = pinctrl_lookup_state(platdata->pctl, "device");
819 if (!IS_ERR(p))
820 platdata->pins_device = p;
821 }
822
823 if (!platdata->enter_lpm)
824 platdata->enter_lpm = ci_hdrc_enter_lpm_common;
825
826 return 0;
827}
828
829static int ci_extcon_register(struct ci_hdrc *ci)
830{
831 struct ci_hdrc_cable *id, *vbus;
832 int ret;
833
834 id = &ci->platdata->id_extcon;
835 id->ci = ci;
836 if (!IS_ERR_OR_NULL(id->edev)) {
837 ret = devm_extcon_register_notifier(ci->dev, id->edev,
838 EXTCON_USB_HOST, &id->nb);
839 if (ret < 0) {
840 dev_err(ci->dev, "register ID failed\n");
841 return ret;
842 }
843 }
844
845 vbus = &ci->platdata->vbus_extcon;
846 vbus->ci = ci;
847 if (!IS_ERR_OR_NULL(vbus->edev)) {
848 ret = devm_extcon_register_notifier(ci->dev, vbus->edev,
849 EXTCON_USB, &vbus->nb);
850 if (ret < 0) {
851 dev_err(ci->dev, "register VBUS failed\n");
852 return ret;
853 }
854 }
855
856 return 0;
857}
858
859static void ci_power_lost_work(struct work_struct *work)
860{
861 struct ci_hdrc *ci = container_of(work, struct ci_hdrc, power_lost_work);
862 enum ci_role role;
863
864 disable_irq_nosync(ci->irq);
865 pm_runtime_get_sync(ci->dev);
866 if (!ci_otg_is_fsm_mode(ci)) {
867 role = ci_get_role(ci);
868
869 if (ci->role != role) {
870 ci_handle_id_switch(ci);
871 } else if (role == CI_ROLE_GADGET) {
872 if (ci->is_otg && hw_read_otgsc(ci, OTGSC_BSV))
873 usb_gadget_vbus_connect(&ci->gadget);
874 }
875 }
876 pm_runtime_put_sync(ci->dev);
877 enable_irq(ci->irq);
878}
879
880static DEFINE_IDA(ci_ida);
881
882struct platform_device *ci_hdrc_add_device(struct device *dev,
883 struct resource *res, int nres,
884 struct ci_hdrc_platform_data *platdata)
885{
886 struct platform_device *pdev;
887 int id, ret;
888
889 ret = ci_get_platdata(dev, platdata);
890 if (ret)
891 return ERR_PTR(ret);
892
893 id = ida_alloc(&ci_ida, GFP_KERNEL);
894 if (id < 0)
895 return ERR_PTR(id);
896
897 pdev = platform_device_alloc("ci_hdrc", id);
898 if (!pdev) {
899 ret = -ENOMEM;
900 goto put_id;
901 }
902
903 pdev->dev.parent = dev;
904 device_set_of_node_from_dev(&pdev->dev, dev);
905
906 ret = platform_device_add_resources(pdev, res, nres);
907 if (ret)
908 goto err;
909
910 ret = platform_device_add_data(pdev, platdata, sizeof(*platdata));
911 if (ret)
912 goto err;
913
914 ret = platform_device_add(pdev);
915 if (ret)
916 goto err;
917
918 return pdev;
919
920err:
921 platform_device_put(pdev);
922put_id:
923 ida_free(&ci_ida, id);
924 return ERR_PTR(ret);
925}
926EXPORT_SYMBOL_GPL(ci_hdrc_add_device);
927
928void ci_hdrc_remove_device(struct platform_device *pdev)
929{
930 int id = pdev->id;
931 platform_device_unregister(pdev);
932 ida_free(&ci_ida, id);
933}
934EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
935
936/**
937 * ci_hdrc_query_available_role: get runtime available operation mode
938 *
939 * The glue layer can get current operation mode (host/peripheral/otg)
940 * This function should be called after ci core device has created.
941 *
942 * @pdev: the platform device of ci core.
943 *
944 * Return runtime usb_dr_mode.
945 */
946enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev)
947{
948 struct ci_hdrc *ci = platform_get_drvdata(pdev);
949
950 if (!ci)
951 return USB_DR_MODE_UNKNOWN;
952 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])
953 return USB_DR_MODE_OTG;
954 else if (ci->roles[CI_ROLE_HOST])
955 return USB_DR_MODE_HOST;
956 else if (ci->roles[CI_ROLE_GADGET])
957 return USB_DR_MODE_PERIPHERAL;
958 else
959 return USB_DR_MODE_UNKNOWN;
960}
961EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role);
962
963static inline void ci_role_destroy(struct ci_hdrc *ci)
964{
965 ci_hdrc_gadget_destroy(ci);
966 ci_hdrc_host_destroy(ci);
967 if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
968 ci_hdrc_otg_destroy(ci);
969}
970
971static void ci_get_otg_capable(struct ci_hdrc *ci)
972{
973 if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG)
974 ci->is_otg = false;
975 else
976 ci->is_otg = (hw_read(ci, CAP_DCCPARAMS,
977 DCCPARAMS_DC | DCCPARAMS_HC)
978 == (DCCPARAMS_DC | DCCPARAMS_HC));
979 if (ci->is_otg) {
980 dev_dbg(ci->dev, "It is OTG capable controller\n");
981 /* Disable and clear all OTG irq */
982 hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
983 OTGSC_INT_STATUS_BITS);
984 }
985}
986
987static ssize_t role_show(struct device *dev, struct device_attribute *attr,
988 char *buf)
989{
990 struct ci_hdrc *ci = dev_get_drvdata(dev);
991
992 if (ci->role != CI_ROLE_END)
993 return sprintf(buf, "%s\n", ci_role(ci)->name);
994
995 return 0;
996}
997
998static ssize_t role_store(struct device *dev,
999 struct device_attribute *attr, const char *buf, size_t n)
1000{
1001 struct ci_hdrc *ci = dev_get_drvdata(dev);
1002 enum ci_role role;
1003 int ret;
1004
1005 if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) {
1006 dev_warn(dev, "Current configuration is not dual-role, quit\n");
1007 return -EPERM;
1008 }
1009
1010 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
1011 if (!strncmp(buf, ci->roles[role]->name,
1012 strlen(ci->roles[role]->name)))
1013 break;
1014
1015 if (role == CI_ROLE_END)
1016 return -EINVAL;
1017
1018 mutex_lock(&ci->mutex);
1019
1020 if (role == ci->role) {
1021 mutex_unlock(&ci->mutex);
1022 return n;
1023 }
1024
1025 pm_runtime_get_sync(dev);
1026 disable_irq(ci->irq);
1027 ci_role_stop(ci);
1028 ret = ci_role_start(ci, role);
1029 if (!ret && ci->role == CI_ROLE_GADGET)
1030 ci_handle_vbus_change(ci);
1031 enable_irq(ci->irq);
1032 pm_runtime_put_sync(dev);
1033 mutex_unlock(&ci->mutex);
1034
1035 return (ret == 0) ? n : ret;
1036}
1037static DEVICE_ATTR_RW(role);
1038
1039static struct attribute *ci_attrs[] = {
1040 &dev_attr_role.attr,
1041 NULL,
1042};
1043ATTRIBUTE_GROUPS(ci);
1044
1045static int ci_hdrc_probe(struct platform_device *pdev)
1046{
1047 struct device *dev = &pdev->dev;
1048 struct ci_hdrc *ci;
1049 struct resource *res;
1050 void __iomem *base;
1051 int ret;
1052 enum usb_dr_mode dr_mode;
1053
1054 if (!dev_get_platdata(dev)) {
1055 dev_err(dev, "platform data missing\n");
1056 return -ENODEV;
1057 }
1058
1059 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1060 if (IS_ERR(base))
1061 return PTR_ERR(base);
1062
1063 ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL);
1064 if (!ci)
1065 return -ENOMEM;
1066
1067 spin_lock_init(&ci->lock);
1068 mutex_init(&ci->mutex);
1069 INIT_WORK(&ci->power_lost_work, ci_power_lost_work);
1070
1071 ci->dev = dev;
1072 ci->platdata = dev_get_platdata(dev);
1073 ci->imx28_write_fix = !!(ci->platdata->flags &
1074 CI_HDRC_IMX28_WRITE_FIX);
1075 ci->supports_runtime_pm = !!(ci->platdata->flags &
1076 CI_HDRC_SUPPORTS_RUNTIME_PM);
1077 ci->has_portsc_pec_bug = !!(ci->platdata->flags &
1078 CI_HDRC_HAS_PORTSC_PEC_MISSED);
1079 ci->has_short_pkt_limit = !!(ci->platdata->flags &
1080 CI_HDRC_HAS_SHORT_PKT_LIMIT);
1081 platform_set_drvdata(pdev, ci);
1082
1083 ret = hw_device_init(ci, base);
1084 if (ret < 0) {
1085 dev_err(dev, "can't initialize hardware\n");
1086 return -ENODEV;
1087 }
1088
1089 ret = ci_ulpi_init(ci);
1090 if (ret)
1091 return ret;
1092
1093 if (ci->platdata->phy) {
1094 ci->phy = ci->platdata->phy;
1095 } else if (ci->platdata->usb_phy) {
1096 ci->usb_phy = ci->platdata->usb_phy;
1097 } else {
1098 /* Look for a generic PHY first */
1099 ci->phy = devm_phy_get(dev->parent, "usb-phy");
1100
1101 if (PTR_ERR(ci->phy) == -EPROBE_DEFER) {
1102 ret = -EPROBE_DEFER;
1103 goto ulpi_exit;
1104 } else if (IS_ERR(ci->phy)) {
1105 ci->phy = NULL;
1106 }
1107
1108 /* Look for a legacy USB PHY from device-tree next */
1109 if (!ci->phy) {
1110 ci->usb_phy = devm_usb_get_phy_by_phandle(dev->parent,
1111 "phys", 0);
1112
1113 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) {
1114 ret = -EPROBE_DEFER;
1115 goto ulpi_exit;
1116 } else if (IS_ERR(ci->usb_phy)) {
1117 ci->usb_phy = NULL;
1118 }
1119 }
1120
1121 /* Look for any registered legacy USB PHY as last resort */
1122 if (!ci->phy && !ci->usb_phy) {
1123 ci->usb_phy = devm_usb_get_phy(dev->parent,
1124 USB_PHY_TYPE_USB2);
1125
1126 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) {
1127 ret = -EPROBE_DEFER;
1128 goto ulpi_exit;
1129 } else if (IS_ERR(ci->usb_phy)) {
1130 ci->usb_phy = NULL;
1131 }
1132 }
1133
1134 /* No USB PHY was found in the end */
1135 if (!ci->phy && !ci->usb_phy) {
1136 ret = -ENXIO;
1137 goto ulpi_exit;
1138 }
1139 }
1140
1141 ret = ci_usb_phy_init(ci);
1142 if (ret) {
1143 dev_err(dev, "unable to init phy: %d\n", ret);
1144 goto ulpi_exit;
1145 }
1146
1147 ci->hw_bank.phys = res->start;
1148
1149 ci->irq = platform_get_irq(pdev, 0);
1150 if (ci->irq < 0) {
1151 ret = ci->irq;
1152 goto deinit_phy;
1153 }
1154
1155 ci_get_otg_capable(ci);
1156
1157 dr_mode = ci->platdata->dr_mode;
1158 /* initialize role(s) before the interrupt is requested */
1159 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) {
1160 ret = ci_hdrc_host_init(ci);
1161 if (ret) {
1162 if (ret == -ENXIO)
1163 dev_info(dev, "doesn't support host\n");
1164 else
1165 goto deinit_phy;
1166 }
1167 }
1168
1169 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
1170 ret = ci_hdrc_gadget_init(ci);
1171 if (ret) {
1172 if (ret == -ENXIO)
1173 dev_info(dev, "doesn't support gadget\n");
1174 else
1175 goto deinit_host;
1176 }
1177 }
1178
1179 if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) {
1180 dev_err(dev, "no supported roles\n");
1181 ret = -ENODEV;
1182 goto deinit_gadget;
1183 }
1184
1185 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) {
1186 ret = ci_hdrc_otg_init(ci);
1187 if (ret) {
1188 dev_err(dev, "init otg fails, ret = %d\n", ret);
1189 goto deinit_gadget;
1190 }
1191 }
1192
1193 if (ci_role_switch.fwnode) {
1194 ci_role_switch.driver_data = ci;
1195 ci->role_switch = usb_role_switch_register(dev,
1196 &ci_role_switch);
1197 if (IS_ERR(ci->role_switch)) {
1198 ret = PTR_ERR(ci->role_switch);
1199 goto deinit_otg;
1200 }
1201 }
1202
1203 ci->role = ci_get_role(ci);
1204 if (!ci_otg_is_fsm_mode(ci)) {
1205 /* only update vbus status for peripheral */
1206 if (ci->role == CI_ROLE_GADGET) {
1207 /* Pull down DP for possible charger detection */
1208 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
1209 ci_handle_vbus_change(ci);
1210 }
1211
1212 ret = ci_role_start(ci, ci->role);
1213 if (ret) {
1214 dev_err(dev, "can't start %s role\n",
1215 ci_role(ci)->name);
1216 goto stop;
1217 }
1218 }
1219
1220 ret = devm_request_irq(dev, ci->irq, ci_irq_handler, IRQF_SHARED,
1221 ci->platdata->name, ci);
1222 if (ret)
1223 goto stop;
1224
1225 ret = ci_extcon_register(ci);
1226 if (ret)
1227 goto stop;
1228
1229 if (ci->supports_runtime_pm) {
1230 pm_runtime_set_active(&pdev->dev);
1231 pm_runtime_enable(&pdev->dev);
1232 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
1233 pm_runtime_mark_last_busy(ci->dev);
1234 pm_runtime_use_autosuspend(&pdev->dev);
1235 }
1236
1237 if (ci_otg_is_fsm_mode(ci))
1238 ci_hdrc_otg_fsm_start(ci);
1239
1240 device_set_wakeup_capable(&pdev->dev, true);
1241 dbg_create_files(ci);
1242
1243 return 0;
1244
1245stop:
1246 if (ci->role_switch)
1247 usb_role_switch_unregister(ci->role_switch);
1248deinit_otg:
1249 if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
1250 ci_hdrc_otg_destroy(ci);
1251deinit_gadget:
1252 ci_hdrc_gadget_destroy(ci);
1253deinit_host:
1254 ci_hdrc_host_destroy(ci);
1255deinit_phy:
1256 ci_usb_phy_exit(ci);
1257ulpi_exit:
1258 ci_ulpi_exit(ci);
1259
1260 return ret;
1261}
1262
1263static void ci_hdrc_remove(struct platform_device *pdev)
1264{
1265 struct ci_hdrc *ci = platform_get_drvdata(pdev);
1266
1267 if (ci->role_switch)
1268 usb_role_switch_unregister(ci->role_switch);
1269
1270 if (ci->supports_runtime_pm) {
1271 pm_runtime_get_sync(&pdev->dev);
1272 pm_runtime_disable(&pdev->dev);
1273 pm_runtime_put_noidle(&pdev->dev);
1274 }
1275
1276 dbg_remove_files(ci);
1277 ci_role_destroy(ci);
1278 ci_hdrc_enter_lpm(ci, true);
1279 ci_usb_phy_exit(ci);
1280 ci_ulpi_exit(ci);
1281}
1282
1283#ifdef CONFIG_PM
1284/* Prepare wakeup by SRP before suspend */
1285static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci)
1286{
1287 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
1288 !hw_read_otgsc(ci, OTGSC_ID)) {
1289 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP,
1290 PORTSC_PP);
1291 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN,
1292 PORTSC_WKCN);
1293 }
1294}
1295
1296/* Handle SRP when wakeup by data pulse */
1297static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci)
1298{
1299 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
1300 (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) {
1301 if (!hw_read_otgsc(ci, OTGSC_ID)) {
1302 ci->fsm.a_srp_det = 1;
1303 ci->fsm.a_bus_drop = 0;
1304 } else {
1305 ci->fsm.id = 1;
1306 }
1307 ci_otg_queue_work(ci);
1308 }
1309}
1310
1311static void ci_controller_suspend(struct ci_hdrc *ci)
1312{
1313 disable_irq(ci->irq);
1314 ci_hdrc_enter_lpm(ci, true);
1315 if (ci->platdata->phy_clkgate_delay_us)
1316 usleep_range(ci->platdata->phy_clkgate_delay_us,
1317 ci->platdata->phy_clkgate_delay_us + 50);
1318 usb_phy_set_suspend(ci->usb_phy, 1);
1319 ci->in_lpm = true;
1320 enable_irq(ci->irq);
1321}
1322
1323/*
1324 * Handle the wakeup interrupt triggered by extcon connector
1325 * We need to call ci_irq again for extcon since the first
1326 * interrupt (wakeup int) only let the controller be out of
1327 * low power mode, but not handle any interrupts.
1328 */
1329static void ci_extcon_wakeup_int(struct ci_hdrc *ci)
1330{
1331 struct ci_hdrc_cable *cable_id, *cable_vbus;
1332 u32 otgsc = hw_read_otgsc(ci, ~0);
1333
1334 cable_id = &ci->platdata->id_extcon;
1335 cable_vbus = &ci->platdata->vbus_extcon;
1336
1337 if ((!IS_ERR(cable_id->edev) || ci->role_switch)
1338 && ci->is_otg &&
1339 (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS))
1340 ci_irq(ci);
1341
1342 if ((!IS_ERR(cable_vbus->edev) || ci->role_switch)
1343 && ci->is_otg &&
1344 (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS))
1345 ci_irq(ci);
1346}
1347
1348static int ci_controller_resume(struct device *dev)
1349{
1350 struct ci_hdrc *ci = dev_get_drvdata(dev);
1351 int ret;
1352
1353 dev_dbg(dev, "at %s\n", __func__);
1354
1355 if (!ci->in_lpm) {
1356 WARN_ON(1);
1357 return 0;
1358 }
1359
1360 ci_hdrc_enter_lpm(ci, false);
1361
1362 ret = ci_ulpi_resume(ci);
1363 if (ret)
1364 return ret;
1365
1366 if (ci->usb_phy) {
1367 usb_phy_set_suspend(ci->usb_phy, 0);
1368 usb_phy_set_wakeup(ci->usb_phy, false);
1369 hw_wait_phy_stable();
1370 }
1371
1372 ci->in_lpm = false;
1373 if (ci->wakeup_int) {
1374 ci->wakeup_int = false;
1375 pm_runtime_mark_last_busy(ci->dev);
1376 pm_runtime_put_autosuspend(ci->dev);
1377 enable_irq(ci->irq);
1378 if (ci_otg_is_fsm_mode(ci))
1379 ci_otg_fsm_wakeup_by_srp(ci);
1380 ci_extcon_wakeup_int(ci);
1381 }
1382
1383 return 0;
1384}
1385
1386#ifdef CONFIG_PM_SLEEP
1387static int ci_suspend(struct device *dev)
1388{
1389 struct ci_hdrc *ci = dev_get_drvdata(dev);
1390
1391 if (ci->wq)
1392 flush_workqueue(ci->wq);
1393 /*
1394 * Controller needs to be active during suspend, otherwise the core
1395 * may run resume when the parent is at suspend if other driver's
1396 * suspend fails, it occurs before parent's suspend has not started,
1397 * but the core suspend has finished.
1398 */
1399 if (ci->in_lpm)
1400 pm_runtime_resume(dev);
1401
1402 if (ci->in_lpm) {
1403 WARN_ON(1);
1404 return 0;
1405 }
1406
1407 /* Extra routine per role before system suspend */
1408 if (ci->role != CI_ROLE_END && ci_role(ci)->suspend)
1409 ci_role(ci)->suspend(ci);
1410
1411 if (device_may_wakeup(dev)) {
1412 if (ci_otg_is_fsm_mode(ci))
1413 ci_otg_fsm_suspend_for_srp(ci);
1414
1415 usb_phy_set_wakeup(ci->usb_phy, true);
1416 enable_irq_wake(ci->irq);
1417 }
1418
1419 ci_controller_suspend(ci);
1420
1421 return 0;
1422}
1423
1424static int ci_resume(struct device *dev)
1425{
1426 struct ci_hdrc *ci = dev_get_drvdata(dev);
1427 bool power_lost;
1428 int ret;
1429
1430 /* Since ASYNCLISTADDR (host mode) and ENDPTLISTADDR (device
1431 * mode) share the same register address. We can check if
1432 * controller resume from power lost based on this address
1433 * due to this register will be reset after power lost.
1434 */
1435 power_lost = !hw_read(ci, OP_ENDPTLISTADDR, ~0);
1436
1437 if (device_may_wakeup(dev))
1438 disable_irq_wake(ci->irq);
1439
1440 ret = ci_controller_resume(dev);
1441 if (ret)
1442 return ret;
1443
1444 if (power_lost) {
1445 /* shutdown and re-init for phy */
1446 ci_usb_phy_exit(ci);
1447 ci_usb_phy_init(ci);
1448 }
1449
1450 /* Extra routine per role after system resume */
1451 if (ci->role != CI_ROLE_END && ci_role(ci)->resume)
1452 ci_role(ci)->resume(ci, power_lost);
1453
1454 if (power_lost)
1455 queue_work(system_freezable_wq, &ci->power_lost_work);
1456
1457 if (ci->supports_runtime_pm) {
1458 pm_runtime_disable(dev);
1459 pm_runtime_set_active(dev);
1460 pm_runtime_enable(dev);
1461 }
1462
1463 return ret;
1464}
1465#endif /* CONFIG_PM_SLEEP */
1466
1467static int ci_runtime_suspend(struct device *dev)
1468{
1469 struct ci_hdrc *ci = dev_get_drvdata(dev);
1470
1471 dev_dbg(dev, "at %s\n", __func__);
1472
1473 if (ci->in_lpm) {
1474 WARN_ON(1);
1475 return 0;
1476 }
1477
1478 if (ci_otg_is_fsm_mode(ci))
1479 ci_otg_fsm_suspend_for_srp(ci);
1480
1481 usb_phy_set_wakeup(ci->usb_phy, true);
1482 ci_controller_suspend(ci);
1483
1484 return 0;
1485}
1486
1487static int ci_runtime_resume(struct device *dev)
1488{
1489 return ci_controller_resume(dev);
1490}
1491
1492#endif /* CONFIG_PM */
1493static const struct dev_pm_ops ci_pm_ops = {
1494 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume)
1495 SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL)
1496};
1497
1498static struct platform_driver ci_hdrc_driver = {
1499 .probe = ci_hdrc_probe,
1500 .remove = ci_hdrc_remove,
1501 .driver = {
1502 .name = "ci_hdrc",
1503 .pm = &ci_pm_ops,
1504 .dev_groups = ci_groups,
1505 },
1506};
1507
1508static int __init ci_hdrc_platform_register(void)
1509{
1510 ci_hdrc_host_driver_init();
1511 return platform_driver_register(&ci_hdrc_driver);
1512}
1513module_init(ci_hdrc_platform_register);
1514
1515static void __exit ci_hdrc_platform_unregister(void)
1516{
1517 platform_driver_unregister(&ci_hdrc_driver);
1518}
1519module_exit(ci_hdrc_platform_unregister);
1520
1521MODULE_ALIAS("platform:ci_hdrc");
1522MODULE_LICENSE("GPL v2");
1523MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
1524MODULE_DESCRIPTION("ChipIdea HDRC Driver");
1/*
2 * core.c - ChipIdea USB IP core family device controller
3 *
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
5 *
6 * Author: David Lopo
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13/*
14 * Description: ChipIdea USB IP core family device controller
15 *
16 * This driver is composed of several blocks:
17 * - HW: hardware interface
18 * - DBG: debug facilities (optional)
19 * - UTIL: utilities
20 * - ISR: interrupts handling
21 * - ENDPT: endpoint operations (Gadget API)
22 * - GADGET: gadget operations (Gadget API)
23 * - BUS: bus glue code, bus abstraction layer
24 *
25 * Compile Options
26 * - STALL_IN: non-empty bulk-in pipes cannot be halted
27 * if defined mass storage compliance succeeds but with warnings
28 * => case 4: Hi > Dn
29 * => case 5: Hi > Di
30 * => case 8: Hi <> Do
31 * if undefined usbtest 13 fails
32 * - TRACE: enable function tracing (depends on DEBUG)
33 *
34 * Main Features
35 * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
36 * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
37 * - Normal & LPM support
38 *
39 * USBTEST Report
40 * - OK: 0-12, 13 (STALL_IN defined) & 14
41 * - Not Supported: 15 & 16 (ISO)
42 *
43 * TODO List
44 * - Suspend & Remote Wakeup
45 */
46#include <linux/delay.h>
47#include <linux/device.h>
48#include <linux/dma-mapping.h>
49#include <linux/extcon.h>
50#include <linux/phy/phy.h>
51#include <linux/platform_device.h>
52#include <linux/module.h>
53#include <linux/idr.h>
54#include <linux/interrupt.h>
55#include <linux/io.h>
56#include <linux/kernel.h>
57#include <linux/slab.h>
58#include <linux/pm_runtime.h>
59#include <linux/usb/ch9.h>
60#include <linux/usb/gadget.h>
61#include <linux/usb/otg.h>
62#include <linux/usb/chipidea.h>
63#include <linux/usb/of.h>
64#include <linux/of.h>
65#include <linux/phy.h>
66#include <linux/regulator/consumer.h>
67#include <linux/usb/ehci_def.h>
68
69#include "ci.h"
70#include "udc.h"
71#include "bits.h"
72#include "host.h"
73#include "otg.h"
74#include "otg_fsm.h"
75
76/* Controller register map */
77static const u8 ci_regs_nolpm[] = {
78 [CAP_CAPLENGTH] = 0x00U,
79 [CAP_HCCPARAMS] = 0x08U,
80 [CAP_DCCPARAMS] = 0x24U,
81 [CAP_TESTMODE] = 0x38U,
82 [OP_USBCMD] = 0x00U,
83 [OP_USBSTS] = 0x04U,
84 [OP_USBINTR] = 0x08U,
85 [OP_DEVICEADDR] = 0x14U,
86 [OP_ENDPTLISTADDR] = 0x18U,
87 [OP_TTCTRL] = 0x1CU,
88 [OP_BURSTSIZE] = 0x20U,
89 [OP_PORTSC] = 0x44U,
90 [OP_DEVLC] = 0x84U,
91 [OP_OTGSC] = 0x64U,
92 [OP_USBMODE] = 0x68U,
93 [OP_ENDPTSETUPSTAT] = 0x6CU,
94 [OP_ENDPTPRIME] = 0x70U,
95 [OP_ENDPTFLUSH] = 0x74U,
96 [OP_ENDPTSTAT] = 0x78U,
97 [OP_ENDPTCOMPLETE] = 0x7CU,
98 [OP_ENDPTCTRL] = 0x80U,
99};
100
101static const u8 ci_regs_lpm[] = {
102 [CAP_CAPLENGTH] = 0x00U,
103 [CAP_HCCPARAMS] = 0x08U,
104 [CAP_DCCPARAMS] = 0x24U,
105 [CAP_TESTMODE] = 0xFCU,
106 [OP_USBCMD] = 0x00U,
107 [OP_USBSTS] = 0x04U,
108 [OP_USBINTR] = 0x08U,
109 [OP_DEVICEADDR] = 0x14U,
110 [OP_ENDPTLISTADDR] = 0x18U,
111 [OP_TTCTRL] = 0x1CU,
112 [OP_BURSTSIZE] = 0x20U,
113 [OP_PORTSC] = 0x44U,
114 [OP_DEVLC] = 0x84U,
115 [OP_OTGSC] = 0xC4U,
116 [OP_USBMODE] = 0xC8U,
117 [OP_ENDPTSETUPSTAT] = 0xD8U,
118 [OP_ENDPTPRIME] = 0xDCU,
119 [OP_ENDPTFLUSH] = 0xE0U,
120 [OP_ENDPTSTAT] = 0xE4U,
121 [OP_ENDPTCOMPLETE] = 0xE8U,
122 [OP_ENDPTCTRL] = 0xECU,
123};
124
125static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm)
126{
127 int i;
128
129 for (i = 0; i < OP_ENDPTCTRL; i++)
130 ci->hw_bank.regmap[i] =
131 (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) +
132 (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
133
134 for (; i <= OP_LAST; i++)
135 ci->hw_bank.regmap[i] = ci->hw_bank.op +
136 4 * (i - OP_ENDPTCTRL) +
137 (is_lpm
138 ? ci_regs_lpm[OP_ENDPTCTRL]
139 : ci_regs_nolpm[OP_ENDPTCTRL]);
140
141}
142
143static enum ci_revision ci_get_revision(struct ci_hdrc *ci)
144{
145 int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION);
146 enum ci_revision rev = CI_REVISION_UNKNOWN;
147
148 if (ver == 0x2) {
149 rev = hw_read_id_reg(ci, ID_ID, REVISION)
150 >> __ffs(REVISION);
151 rev += CI_REVISION_20;
152 } else if (ver == 0x0) {
153 rev = CI_REVISION_1X;
154 }
155
156 return rev;
157}
158
159/**
160 * hw_read_intr_enable: returns interrupt enable register
161 *
162 * @ci: the controller
163 *
164 * This function returns register data
165 */
166u32 hw_read_intr_enable(struct ci_hdrc *ci)
167{
168 return hw_read(ci, OP_USBINTR, ~0);
169}
170
171/**
172 * hw_read_intr_status: returns interrupt status register
173 *
174 * @ci: the controller
175 *
176 * This function returns register data
177 */
178u32 hw_read_intr_status(struct ci_hdrc *ci)
179{
180 return hw_read(ci, OP_USBSTS, ~0);
181}
182
183/**
184 * hw_port_test_set: writes port test mode (execute without interruption)
185 * @mode: new value
186 *
187 * This function returns an error code
188 */
189int hw_port_test_set(struct ci_hdrc *ci, u8 mode)
190{
191 const u8 TEST_MODE_MAX = 7;
192
193 if (mode > TEST_MODE_MAX)
194 return -EINVAL;
195
196 hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC));
197 return 0;
198}
199
200/**
201 * hw_port_test_get: reads port test mode value
202 *
203 * @ci: the controller
204 *
205 * This function returns port test mode value
206 */
207u8 hw_port_test_get(struct ci_hdrc *ci)
208{
209 return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC);
210}
211
212static void hw_wait_phy_stable(void)
213{
214 /*
215 * The phy needs some delay to output the stable status from low
216 * power mode. And for OTGSC, the status inputs are debounced
217 * using a 1 ms time constant, so, delay 2ms for controller to get
218 * the stable status, like vbus and id when the phy leaves low power.
219 */
220 usleep_range(2000, 2500);
221}
222
223/* The PHY enters/leaves low power mode */
224static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable)
225{
226 enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC;
227 bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm)));
228
229 if (enable && !lpm)
230 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
231 PORTSC_PHCD(ci->hw_bank.lpm));
232 else if (!enable && lpm)
233 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
234 0);
235}
236
237static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
238{
239 u32 reg;
240
241 /* bank is a module variable */
242 ci->hw_bank.abs = base;
243
244 ci->hw_bank.cap = ci->hw_bank.abs;
245 ci->hw_bank.cap += ci->platdata->capoffset;
246 ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff);
247
248 hw_alloc_regmap(ci, false);
249 reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
250 __ffs(HCCPARAMS_LEN);
251 ci->hw_bank.lpm = reg;
252 if (reg)
253 hw_alloc_regmap(ci, !!reg);
254 ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs;
255 ci->hw_bank.size += OP_LAST;
256 ci->hw_bank.size /= sizeof(u32);
257
258 reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
259 __ffs(DCCPARAMS_DEN);
260 ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
261
262 if (ci->hw_ep_max > ENDPT_MAX)
263 return -ENODEV;
264
265 ci_hdrc_enter_lpm(ci, false);
266
267 /* Disable all interrupts bits */
268 hw_write(ci, OP_USBINTR, 0xffffffff, 0);
269
270 /* Clear all interrupts status bits*/
271 hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff);
272
273 ci->rev = ci_get_revision(ci);
274
275 dev_dbg(ci->dev,
276 "ChipIdea HDRC found, revision: %d, lpm: %d; cap: %p op: %p\n",
277 ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op);
278
279 /* setup lock mode ? */
280
281 /* ENDPTSETUPSTAT is '0' by default */
282
283 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
284
285 return 0;
286}
287
288static void hw_phymode_configure(struct ci_hdrc *ci)
289{
290 u32 portsc, lpm, sts = 0;
291
292 switch (ci->platdata->phy_mode) {
293 case USBPHY_INTERFACE_MODE_UTMI:
294 portsc = PORTSC_PTS(PTS_UTMI);
295 lpm = DEVLC_PTS(PTS_UTMI);
296 break;
297 case USBPHY_INTERFACE_MODE_UTMIW:
298 portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW;
299 lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW;
300 break;
301 case USBPHY_INTERFACE_MODE_ULPI:
302 portsc = PORTSC_PTS(PTS_ULPI);
303 lpm = DEVLC_PTS(PTS_ULPI);
304 break;
305 case USBPHY_INTERFACE_MODE_SERIAL:
306 portsc = PORTSC_PTS(PTS_SERIAL);
307 lpm = DEVLC_PTS(PTS_SERIAL);
308 sts = 1;
309 break;
310 case USBPHY_INTERFACE_MODE_HSIC:
311 portsc = PORTSC_PTS(PTS_HSIC);
312 lpm = DEVLC_PTS(PTS_HSIC);
313 break;
314 default:
315 return;
316 }
317
318 if (ci->hw_bank.lpm) {
319 hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm);
320 if (sts)
321 hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS);
322 } else {
323 hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc);
324 if (sts)
325 hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
326 }
327}
328
329/**
330 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
331 * interfaces
332 * @ci: the controller
333 *
334 * This function returns an error code if the phy failed to init
335 */
336static int _ci_usb_phy_init(struct ci_hdrc *ci)
337{
338 int ret;
339
340 if (ci->phy) {
341 ret = phy_init(ci->phy);
342 if (ret)
343 return ret;
344
345 ret = phy_power_on(ci->phy);
346 if (ret) {
347 phy_exit(ci->phy);
348 return ret;
349 }
350 } else {
351 ret = usb_phy_init(ci->usb_phy);
352 }
353
354 return ret;
355}
356
357/**
358 * _ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy
359 * interfaces
360 * @ci: the controller
361 */
362static void ci_usb_phy_exit(struct ci_hdrc *ci)
363{
364 if (ci->phy) {
365 phy_power_off(ci->phy);
366 phy_exit(ci->phy);
367 } else {
368 usb_phy_shutdown(ci->usb_phy);
369 }
370}
371
372/**
373 * ci_usb_phy_init: initialize phy according to different phy type
374 * @ci: the controller
375 *
376 * This function returns an error code if usb_phy_init has failed
377 */
378static int ci_usb_phy_init(struct ci_hdrc *ci)
379{
380 int ret;
381
382 switch (ci->platdata->phy_mode) {
383 case USBPHY_INTERFACE_MODE_UTMI:
384 case USBPHY_INTERFACE_MODE_UTMIW:
385 case USBPHY_INTERFACE_MODE_HSIC:
386 ret = _ci_usb_phy_init(ci);
387 if (!ret)
388 hw_wait_phy_stable();
389 else
390 return ret;
391 hw_phymode_configure(ci);
392 break;
393 case USBPHY_INTERFACE_MODE_ULPI:
394 case USBPHY_INTERFACE_MODE_SERIAL:
395 hw_phymode_configure(ci);
396 ret = _ci_usb_phy_init(ci);
397 if (ret)
398 return ret;
399 break;
400 default:
401 ret = _ci_usb_phy_init(ci);
402 if (!ret)
403 hw_wait_phy_stable();
404 }
405
406 return ret;
407}
408
409
410/**
411 * ci_platform_configure: do controller configure
412 * @ci: the controller
413 *
414 */
415void ci_platform_configure(struct ci_hdrc *ci)
416{
417 bool is_device_mode, is_host_mode;
418
419 is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC;
420 is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC;
421
422 if (is_device_mode &&
423 (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING))
424 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
425
426 if (is_host_mode &&
427 (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING))
428 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
429
430 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
431 if (ci->hw_bank.lpm)
432 hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
433 else
434 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
435 }
436
437 if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA)
438 hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA);
439
440 hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16);
441
442 if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST)
443 hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK,
444 ci->platdata->ahb_burst_config);
445
446 /* override burst size, take effect only when ahb_burst_config is 0 */
447 if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) {
448 if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST)
449 hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK,
450 ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK));
451
452 if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST)
453 hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK,
454 ci->platdata->rx_burst_size);
455 }
456}
457
458/**
459 * hw_controller_reset: do controller reset
460 * @ci: the controller
461 *
462 * This function returns an error code
463 */
464static int hw_controller_reset(struct ci_hdrc *ci)
465{
466 int count = 0;
467
468 hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST);
469 while (hw_read(ci, OP_USBCMD, USBCMD_RST)) {
470 udelay(10);
471 if (count++ > 1000)
472 return -ETIMEDOUT;
473 }
474
475 return 0;
476}
477
478/**
479 * hw_device_reset: resets chip (execute without interruption)
480 * @ci: the controller
481 *
482 * This function returns an error code
483 */
484int hw_device_reset(struct ci_hdrc *ci)
485{
486 int ret;
487
488 /* should flush & stop before reset */
489 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
490 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
491
492 ret = hw_controller_reset(ci);
493 if (ret) {
494 dev_err(ci->dev, "error resetting controller, ret=%d\n", ret);
495 return ret;
496 }
497
498 if (ci->platdata->notify_event)
499 ci->platdata->notify_event(ci,
500 CI_HDRC_CONTROLLER_RESET_EVENT);
501
502 /* USBMODE should be configured step by step */
503 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
504 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC);
505 /* HW >= 2.3 */
506 hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
507
508 if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) {
509 pr_err("cannot enter in %s device mode", ci_role(ci)->name);
510 pr_err("lpm = %i", ci->hw_bank.lpm);
511 return -ENODEV;
512 }
513
514 ci_platform_configure(ci);
515
516 return 0;
517}
518
519/**
520 * hw_wait_reg: wait the register value
521 *
522 * Sometimes, it needs to wait register value before going on.
523 * Eg, when switch to device mode, the vbus value should be lower
524 * than OTGSC_BSV before connects to host.
525 *
526 * @ci: the controller
527 * @reg: register index
528 * @mask: mast bit
529 * @value: the bit value to wait
530 * @timeout_ms: timeout in millisecond
531 *
532 * This function returns an error code if timeout
533 */
534int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask,
535 u32 value, unsigned int timeout_ms)
536{
537 unsigned long elapse = jiffies + msecs_to_jiffies(timeout_ms);
538
539 while (hw_read(ci, reg, mask) != value) {
540 if (time_after(jiffies, elapse)) {
541 dev_err(ci->dev, "timeout waiting for %08x in %d\n",
542 mask, reg);
543 return -ETIMEDOUT;
544 }
545 msleep(20);
546 }
547
548 return 0;
549}
550
551static irqreturn_t ci_irq(int irq, void *data)
552{
553 struct ci_hdrc *ci = data;
554 irqreturn_t ret = IRQ_NONE;
555 u32 otgsc = 0;
556
557 if (ci->in_lpm) {
558 disable_irq_nosync(irq);
559 ci->wakeup_int = true;
560 pm_runtime_get(ci->dev);
561 return IRQ_HANDLED;
562 }
563
564 if (ci->is_otg) {
565 otgsc = hw_read_otgsc(ci, ~0);
566 if (ci_otg_is_fsm_mode(ci)) {
567 ret = ci_otg_fsm_irq(ci);
568 if (ret == IRQ_HANDLED)
569 return ret;
570 }
571 }
572
573 /*
574 * Handle id change interrupt, it indicates device/host function
575 * switch.
576 */
577 if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) {
578 ci->id_event = true;
579 /* Clear ID change irq status */
580 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS);
581 ci_otg_queue_work(ci);
582 return IRQ_HANDLED;
583 }
584
585 /*
586 * Handle vbus change interrupt, it indicates device connection
587 * and disconnection events.
588 */
589 if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) {
590 ci->b_sess_valid_event = true;
591 /* Clear BSV irq */
592 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS);
593 ci_otg_queue_work(ci);
594 return IRQ_HANDLED;
595 }
596
597 /* Handle device/host interrupt */
598 if (ci->role != CI_ROLE_END)
599 ret = ci_role(ci)->irq(ci);
600
601 return ret;
602}
603
604static int ci_vbus_notifier(struct notifier_block *nb, unsigned long event,
605 void *ptr)
606{
607 struct ci_hdrc_cable *vbus = container_of(nb, struct ci_hdrc_cable, nb);
608 struct ci_hdrc *ci = vbus->ci;
609
610 if (event)
611 vbus->state = true;
612 else
613 vbus->state = false;
614
615 vbus->changed = true;
616
617 ci_irq(ci->irq, ci);
618 return NOTIFY_DONE;
619}
620
621static int ci_id_notifier(struct notifier_block *nb, unsigned long event,
622 void *ptr)
623{
624 struct ci_hdrc_cable *id = container_of(nb, struct ci_hdrc_cable, nb);
625 struct ci_hdrc *ci = id->ci;
626
627 if (event)
628 id->state = false;
629 else
630 id->state = true;
631
632 id->changed = true;
633
634 ci_irq(ci->irq, ci);
635 return NOTIFY_DONE;
636}
637
638static int ci_get_platdata(struct device *dev,
639 struct ci_hdrc_platform_data *platdata)
640{
641 struct extcon_dev *ext_vbus, *ext_id;
642 struct ci_hdrc_cable *cable;
643 int ret;
644
645 if (!platdata->phy_mode)
646 platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
647
648 if (!platdata->dr_mode)
649 platdata->dr_mode = usb_get_dr_mode(dev);
650
651 if (platdata->dr_mode == USB_DR_MODE_UNKNOWN)
652 platdata->dr_mode = USB_DR_MODE_OTG;
653
654 if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) {
655 /* Get the vbus regulator */
656 platdata->reg_vbus = devm_regulator_get(dev, "vbus");
657 if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) {
658 return -EPROBE_DEFER;
659 } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) {
660 /* no vbus regulator is needed */
661 platdata->reg_vbus = NULL;
662 } else if (IS_ERR(platdata->reg_vbus)) {
663 dev_err(dev, "Getting regulator error: %ld\n",
664 PTR_ERR(platdata->reg_vbus));
665 return PTR_ERR(platdata->reg_vbus);
666 }
667 /* Get TPL support */
668 if (!platdata->tpl_support)
669 platdata->tpl_support =
670 of_usb_host_tpl_support(dev->of_node);
671 }
672
673 if (platdata->dr_mode == USB_DR_MODE_OTG) {
674 /* We can support HNP and SRP of OTG 2.0 */
675 platdata->ci_otg_caps.otg_rev = 0x0200;
676 platdata->ci_otg_caps.hnp_support = true;
677 platdata->ci_otg_caps.srp_support = true;
678
679 /* Update otg capabilities by DT properties */
680 ret = of_usb_update_otg_caps(dev->of_node,
681 &platdata->ci_otg_caps);
682 if (ret)
683 return ret;
684 }
685
686 if (usb_get_maximum_speed(dev) == USB_SPEED_FULL)
687 platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
688
689 of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
690 &platdata->phy_clkgate_delay_us);
691
692 platdata->itc_setting = 1;
693
694 of_property_read_u32(dev->of_node, "itc-setting",
695 &platdata->itc_setting);
696
697 ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
698 &platdata->ahb_burst_config);
699 if (!ret) {
700 platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST;
701 } else if (ret != -EINVAL) {
702 dev_err(dev, "failed to get ahb-burst-config\n");
703 return ret;
704 }
705
706 ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword",
707 &platdata->tx_burst_size);
708 if (!ret) {
709 platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST;
710 } else if (ret != -EINVAL) {
711 dev_err(dev, "failed to get tx-burst-size-dword\n");
712 return ret;
713 }
714
715 ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword",
716 &platdata->rx_burst_size);
717 if (!ret) {
718 platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST;
719 } else if (ret != -EINVAL) {
720 dev_err(dev, "failed to get rx-burst-size-dword\n");
721 return ret;
722 }
723
724 if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL))
725 platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA;
726
727 ext_id = ERR_PTR(-ENODEV);
728 ext_vbus = ERR_PTR(-ENODEV);
729 if (of_property_read_bool(dev->of_node, "extcon")) {
730 /* Each one of them is not mandatory */
731 ext_vbus = extcon_get_edev_by_phandle(dev, 0);
732 if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
733 return PTR_ERR(ext_vbus);
734
735 ext_id = extcon_get_edev_by_phandle(dev, 1);
736 if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
737 return PTR_ERR(ext_id);
738 }
739
740 cable = &platdata->vbus_extcon;
741 cable->nb.notifier_call = ci_vbus_notifier;
742 cable->edev = ext_vbus;
743
744 if (!IS_ERR(ext_vbus)) {
745 ret = extcon_get_cable_state_(cable->edev, EXTCON_USB);
746 if (ret)
747 cable->state = true;
748 else
749 cable->state = false;
750 }
751
752 cable = &platdata->id_extcon;
753 cable->nb.notifier_call = ci_id_notifier;
754 cable->edev = ext_id;
755
756 if (!IS_ERR(ext_id)) {
757 ret = extcon_get_cable_state_(cable->edev, EXTCON_USB_HOST);
758 if (ret)
759 cable->state = false;
760 else
761 cable->state = true;
762 }
763 return 0;
764}
765
766static int ci_extcon_register(struct ci_hdrc *ci)
767{
768 struct ci_hdrc_cable *id, *vbus;
769 int ret;
770
771 id = &ci->platdata->id_extcon;
772 id->ci = ci;
773 if (!IS_ERR(id->edev)) {
774 ret = extcon_register_notifier(id->edev, EXTCON_USB_HOST,
775 &id->nb);
776 if (ret < 0) {
777 dev_err(ci->dev, "register ID failed\n");
778 return ret;
779 }
780 }
781
782 vbus = &ci->platdata->vbus_extcon;
783 vbus->ci = ci;
784 if (!IS_ERR(vbus->edev)) {
785 ret = extcon_register_notifier(vbus->edev, EXTCON_USB,
786 &vbus->nb);
787 if (ret < 0) {
788 extcon_unregister_notifier(id->edev, EXTCON_USB_HOST,
789 &id->nb);
790 dev_err(ci->dev, "register VBUS failed\n");
791 return ret;
792 }
793 }
794
795 return 0;
796}
797
798static void ci_extcon_unregister(struct ci_hdrc *ci)
799{
800 struct ci_hdrc_cable *cable;
801
802 cable = &ci->platdata->id_extcon;
803 if (!IS_ERR(cable->edev))
804 extcon_unregister_notifier(cable->edev, EXTCON_USB_HOST,
805 &cable->nb);
806
807 cable = &ci->platdata->vbus_extcon;
808 if (!IS_ERR(cable->edev))
809 extcon_unregister_notifier(cable->edev, EXTCON_USB, &cable->nb);
810}
811
812static DEFINE_IDA(ci_ida);
813
814struct platform_device *ci_hdrc_add_device(struct device *dev,
815 struct resource *res, int nres,
816 struct ci_hdrc_platform_data *platdata)
817{
818 struct platform_device *pdev;
819 int id, ret;
820
821 ret = ci_get_platdata(dev, platdata);
822 if (ret)
823 return ERR_PTR(ret);
824
825 id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL);
826 if (id < 0)
827 return ERR_PTR(id);
828
829 pdev = platform_device_alloc("ci_hdrc", id);
830 if (!pdev) {
831 ret = -ENOMEM;
832 goto put_id;
833 }
834
835 pdev->dev.parent = dev;
836 pdev->dev.dma_mask = dev->dma_mask;
837 pdev->dev.dma_parms = dev->dma_parms;
838 dma_set_coherent_mask(&pdev->dev, dev->coherent_dma_mask);
839
840 ret = platform_device_add_resources(pdev, res, nres);
841 if (ret)
842 goto err;
843
844 ret = platform_device_add_data(pdev, platdata, sizeof(*platdata));
845 if (ret)
846 goto err;
847
848 ret = platform_device_add(pdev);
849 if (ret)
850 goto err;
851
852 return pdev;
853
854err:
855 platform_device_put(pdev);
856put_id:
857 ida_simple_remove(&ci_ida, id);
858 return ERR_PTR(ret);
859}
860EXPORT_SYMBOL_GPL(ci_hdrc_add_device);
861
862void ci_hdrc_remove_device(struct platform_device *pdev)
863{
864 int id = pdev->id;
865 platform_device_unregister(pdev);
866 ida_simple_remove(&ci_ida, id);
867}
868EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
869
870static inline void ci_role_destroy(struct ci_hdrc *ci)
871{
872 ci_hdrc_gadget_destroy(ci);
873 ci_hdrc_host_destroy(ci);
874 if (ci->is_otg)
875 ci_hdrc_otg_destroy(ci);
876}
877
878static void ci_get_otg_capable(struct ci_hdrc *ci)
879{
880 if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG)
881 ci->is_otg = false;
882 else
883 ci->is_otg = (hw_read(ci, CAP_DCCPARAMS,
884 DCCPARAMS_DC | DCCPARAMS_HC)
885 == (DCCPARAMS_DC | DCCPARAMS_HC));
886 if (ci->is_otg) {
887 dev_dbg(ci->dev, "It is OTG capable controller\n");
888 /* Disable and clear all OTG irq */
889 hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
890 OTGSC_INT_STATUS_BITS);
891 }
892}
893
894static int ci_hdrc_probe(struct platform_device *pdev)
895{
896 struct device *dev = &pdev->dev;
897 struct ci_hdrc *ci;
898 struct resource *res;
899 void __iomem *base;
900 int ret;
901 enum usb_dr_mode dr_mode;
902
903 if (!dev_get_platdata(dev)) {
904 dev_err(dev, "platform data missing\n");
905 return -ENODEV;
906 }
907
908 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
909 base = devm_ioremap_resource(dev, res);
910 if (IS_ERR(base))
911 return PTR_ERR(base);
912
913 ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL);
914 if (!ci)
915 return -ENOMEM;
916
917 spin_lock_init(&ci->lock);
918 ci->dev = dev;
919 ci->platdata = dev_get_platdata(dev);
920 ci->imx28_write_fix = !!(ci->platdata->flags &
921 CI_HDRC_IMX28_WRITE_FIX);
922 ci->supports_runtime_pm = !!(ci->platdata->flags &
923 CI_HDRC_SUPPORTS_RUNTIME_PM);
924
925 ret = hw_device_init(ci, base);
926 if (ret < 0) {
927 dev_err(dev, "can't initialize hardware\n");
928 return -ENODEV;
929 }
930
931 if (ci->platdata->phy) {
932 ci->phy = ci->platdata->phy;
933 } else if (ci->platdata->usb_phy) {
934 ci->usb_phy = ci->platdata->usb_phy;
935 } else {
936 ci->phy = devm_phy_get(dev->parent, "usb-phy");
937 ci->usb_phy = devm_usb_get_phy(dev->parent, USB_PHY_TYPE_USB2);
938
939 /* if both generic PHY and USB PHY layers aren't enabled */
940 if (PTR_ERR(ci->phy) == -ENOSYS &&
941 PTR_ERR(ci->usb_phy) == -ENXIO)
942 return -ENXIO;
943
944 if (IS_ERR(ci->phy) && IS_ERR(ci->usb_phy))
945 return -EPROBE_DEFER;
946
947 if (IS_ERR(ci->phy))
948 ci->phy = NULL;
949 else if (IS_ERR(ci->usb_phy))
950 ci->usb_phy = NULL;
951 }
952
953 ret = ci_usb_phy_init(ci);
954 if (ret) {
955 dev_err(dev, "unable to init phy: %d\n", ret);
956 return ret;
957 }
958
959 ci->hw_bank.phys = res->start;
960
961 ci->irq = platform_get_irq(pdev, 0);
962 if (ci->irq < 0) {
963 dev_err(dev, "missing IRQ\n");
964 ret = ci->irq;
965 goto deinit_phy;
966 }
967
968 ci_get_otg_capable(ci);
969
970 dr_mode = ci->platdata->dr_mode;
971 /* initialize role(s) before the interrupt is requested */
972 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) {
973 ret = ci_hdrc_host_init(ci);
974 if (ret)
975 dev_info(dev, "doesn't support host\n");
976 }
977
978 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
979 ret = ci_hdrc_gadget_init(ci);
980 if (ret)
981 dev_info(dev, "doesn't support gadget\n");
982 }
983
984 if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) {
985 dev_err(dev, "no supported roles\n");
986 ret = -ENODEV;
987 goto deinit_phy;
988 }
989
990 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) {
991 ret = ci_hdrc_otg_init(ci);
992 if (ret) {
993 dev_err(dev, "init otg fails, ret = %d\n", ret);
994 goto stop;
995 }
996 }
997
998 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
999 if (ci->is_otg) {
1000 ci->role = ci_otg_role(ci);
1001 /* Enable ID change irq */
1002 hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE);
1003 } else {
1004 /*
1005 * If the controller is not OTG capable, but support
1006 * role switch, the defalt role is gadget, and the
1007 * user can switch it through debugfs.
1008 */
1009 ci->role = CI_ROLE_GADGET;
1010 }
1011 } else {
1012 ci->role = ci->roles[CI_ROLE_HOST]
1013 ? CI_ROLE_HOST
1014 : CI_ROLE_GADGET;
1015 }
1016
1017 if (!ci_otg_is_fsm_mode(ci)) {
1018 /* only update vbus status for peripheral */
1019 if (ci->role == CI_ROLE_GADGET)
1020 ci_handle_vbus_change(ci);
1021
1022 ret = ci_role_start(ci, ci->role);
1023 if (ret) {
1024 dev_err(dev, "can't start %s role\n",
1025 ci_role(ci)->name);
1026 goto stop;
1027 }
1028 }
1029
1030 platform_set_drvdata(pdev, ci);
1031 ret = devm_request_irq(dev, ci->irq, ci_irq, IRQF_SHARED,
1032 ci->platdata->name, ci);
1033 if (ret)
1034 goto stop;
1035
1036 ret = ci_extcon_register(ci);
1037 if (ret)
1038 goto stop;
1039
1040 if (ci->supports_runtime_pm) {
1041 pm_runtime_set_active(&pdev->dev);
1042 pm_runtime_enable(&pdev->dev);
1043 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
1044 pm_runtime_mark_last_busy(ci->dev);
1045 pm_runtime_use_autosuspend(&pdev->dev);
1046 }
1047
1048 if (ci_otg_is_fsm_mode(ci))
1049 ci_hdrc_otg_fsm_start(ci);
1050
1051 device_set_wakeup_capable(&pdev->dev, true);
1052
1053 ret = dbg_create_files(ci);
1054 if (!ret)
1055 return 0;
1056
1057 ci_extcon_unregister(ci);
1058stop:
1059 ci_role_destroy(ci);
1060deinit_phy:
1061 ci_usb_phy_exit(ci);
1062
1063 return ret;
1064}
1065
1066static int ci_hdrc_remove(struct platform_device *pdev)
1067{
1068 struct ci_hdrc *ci = platform_get_drvdata(pdev);
1069
1070 if (ci->supports_runtime_pm) {
1071 pm_runtime_get_sync(&pdev->dev);
1072 pm_runtime_disable(&pdev->dev);
1073 pm_runtime_put_noidle(&pdev->dev);
1074 }
1075
1076 dbg_remove_files(ci);
1077 ci_extcon_unregister(ci);
1078 ci_role_destroy(ci);
1079 ci_hdrc_enter_lpm(ci, true);
1080 ci_usb_phy_exit(ci);
1081
1082 return 0;
1083}
1084
1085#ifdef CONFIG_PM
1086/* Prepare wakeup by SRP before suspend */
1087static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci)
1088{
1089 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
1090 !hw_read_otgsc(ci, OTGSC_ID)) {
1091 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP,
1092 PORTSC_PP);
1093 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN,
1094 PORTSC_WKCN);
1095 }
1096}
1097
1098/* Handle SRP when wakeup by data pulse */
1099static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci)
1100{
1101 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
1102 (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) {
1103 if (!hw_read_otgsc(ci, OTGSC_ID)) {
1104 ci->fsm.a_srp_det = 1;
1105 ci->fsm.a_bus_drop = 0;
1106 } else {
1107 ci->fsm.id = 1;
1108 }
1109 ci_otg_queue_work(ci);
1110 }
1111}
1112
1113static void ci_controller_suspend(struct ci_hdrc *ci)
1114{
1115 disable_irq(ci->irq);
1116 ci_hdrc_enter_lpm(ci, true);
1117 if (ci->platdata->phy_clkgate_delay_us)
1118 usleep_range(ci->platdata->phy_clkgate_delay_us,
1119 ci->platdata->phy_clkgate_delay_us + 50);
1120 usb_phy_set_suspend(ci->usb_phy, 1);
1121 ci->in_lpm = true;
1122 enable_irq(ci->irq);
1123}
1124
1125static int ci_controller_resume(struct device *dev)
1126{
1127 struct ci_hdrc *ci = dev_get_drvdata(dev);
1128
1129 dev_dbg(dev, "at %s\n", __func__);
1130
1131 if (!ci->in_lpm) {
1132 WARN_ON(1);
1133 return 0;
1134 }
1135
1136 ci_hdrc_enter_lpm(ci, false);
1137 if (ci->usb_phy) {
1138 usb_phy_set_suspend(ci->usb_phy, 0);
1139 usb_phy_set_wakeup(ci->usb_phy, false);
1140 hw_wait_phy_stable();
1141 }
1142
1143 ci->in_lpm = false;
1144 if (ci->wakeup_int) {
1145 ci->wakeup_int = false;
1146 pm_runtime_mark_last_busy(ci->dev);
1147 pm_runtime_put_autosuspend(ci->dev);
1148 enable_irq(ci->irq);
1149 if (ci_otg_is_fsm_mode(ci))
1150 ci_otg_fsm_wakeup_by_srp(ci);
1151 }
1152
1153 return 0;
1154}
1155
1156#ifdef CONFIG_PM_SLEEP
1157static int ci_suspend(struct device *dev)
1158{
1159 struct ci_hdrc *ci = dev_get_drvdata(dev);
1160
1161 if (ci->wq)
1162 flush_workqueue(ci->wq);
1163 /*
1164 * Controller needs to be active during suspend, otherwise the core
1165 * may run resume when the parent is at suspend if other driver's
1166 * suspend fails, it occurs before parent's suspend has not started,
1167 * but the core suspend has finished.
1168 */
1169 if (ci->in_lpm)
1170 pm_runtime_resume(dev);
1171
1172 if (ci->in_lpm) {
1173 WARN_ON(1);
1174 return 0;
1175 }
1176
1177 if (device_may_wakeup(dev)) {
1178 if (ci_otg_is_fsm_mode(ci))
1179 ci_otg_fsm_suspend_for_srp(ci);
1180
1181 usb_phy_set_wakeup(ci->usb_phy, true);
1182 enable_irq_wake(ci->irq);
1183 }
1184
1185 ci_controller_suspend(ci);
1186
1187 return 0;
1188}
1189
1190static int ci_resume(struct device *dev)
1191{
1192 struct ci_hdrc *ci = dev_get_drvdata(dev);
1193 int ret;
1194
1195 if (device_may_wakeup(dev))
1196 disable_irq_wake(ci->irq);
1197
1198 ret = ci_controller_resume(dev);
1199 if (ret)
1200 return ret;
1201
1202 if (ci->supports_runtime_pm) {
1203 pm_runtime_disable(dev);
1204 pm_runtime_set_active(dev);
1205 pm_runtime_enable(dev);
1206 }
1207
1208 return ret;
1209}
1210#endif /* CONFIG_PM_SLEEP */
1211
1212static int ci_runtime_suspend(struct device *dev)
1213{
1214 struct ci_hdrc *ci = dev_get_drvdata(dev);
1215
1216 dev_dbg(dev, "at %s\n", __func__);
1217
1218 if (ci->in_lpm) {
1219 WARN_ON(1);
1220 return 0;
1221 }
1222
1223 if (ci_otg_is_fsm_mode(ci))
1224 ci_otg_fsm_suspend_for_srp(ci);
1225
1226 usb_phy_set_wakeup(ci->usb_phy, true);
1227 ci_controller_suspend(ci);
1228
1229 return 0;
1230}
1231
1232static int ci_runtime_resume(struct device *dev)
1233{
1234 return ci_controller_resume(dev);
1235}
1236
1237#endif /* CONFIG_PM */
1238static const struct dev_pm_ops ci_pm_ops = {
1239 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume)
1240 SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL)
1241};
1242
1243static struct platform_driver ci_hdrc_driver = {
1244 .probe = ci_hdrc_probe,
1245 .remove = ci_hdrc_remove,
1246 .driver = {
1247 .name = "ci_hdrc",
1248 .pm = &ci_pm_ops,
1249 },
1250};
1251
1252static int __init ci_hdrc_platform_register(void)
1253{
1254 ci_hdrc_host_driver_init();
1255 return platform_driver_register(&ci_hdrc_driver);
1256}
1257module_init(ci_hdrc_platform_register);
1258
1259static void __exit ci_hdrc_platform_unregister(void)
1260{
1261 platform_driver_unregister(&ci_hdrc_driver);
1262}
1263module_exit(ci_hdrc_platform_unregister);
1264
1265MODULE_ALIAS("platform:ci_hdrc");
1266MODULE_LICENSE("GPL v2");
1267MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
1268MODULE_DESCRIPTION("ChipIdea HDRC Driver");