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19#include <linux/usb/otg.h>
20#include <linux/usb/gadget.h>
21#include <linux/usb/hcd.h>
22#include <linux/usb/chipidea.h>
23#include <linux/regulator/consumer.h>
24
25#include "ci.h"
26#include "bits.h"
27#include "otg.h"
28#include "otg_fsm.h"
29
30
31static ssize_t
32a_bus_req_show(struct device *dev, struct device_attribute *attr, char *buf)
33{
34 char *next;
35 unsigned size, t;
36 struct ci_hdrc *ci = dev_get_drvdata(dev);
37
38 next = buf;
39 size = PAGE_SIZE;
40 t = scnprintf(next, size, "%d\n", ci->fsm.a_bus_req);
41 size -= t;
42 next += t;
43
44 return PAGE_SIZE - size;
45}
46
47static ssize_t
48a_bus_req_store(struct device *dev, struct device_attribute *attr,
49 const char *buf, size_t count)
50{
51 struct ci_hdrc *ci = dev_get_drvdata(dev);
52
53 if (count > 2)
54 return -1;
55
56 mutex_lock(&ci->fsm.lock);
57 if (buf[0] == '0') {
58 ci->fsm.a_bus_req = 0;
59 } else if (buf[0] == '1') {
60
61 if (ci->fsm.a_bus_drop) {
62 mutex_unlock(&ci->fsm.lock);
63 return count;
64 }
65 ci->fsm.a_bus_req = 1;
66 if (ci->fsm.otg->state == OTG_STATE_A_PERIPHERAL) {
67 ci->gadget.host_request_flag = 1;
68 mutex_unlock(&ci->fsm.lock);
69 return count;
70 }
71 }
72
73 ci_otg_queue_work(ci);
74 mutex_unlock(&ci->fsm.lock);
75
76 return count;
77}
78static DEVICE_ATTR_RW(a_bus_req);
79
80static ssize_t
81a_bus_drop_show(struct device *dev, struct device_attribute *attr, char *buf)
82{
83 char *next;
84 unsigned size, t;
85 struct ci_hdrc *ci = dev_get_drvdata(dev);
86
87 next = buf;
88 size = PAGE_SIZE;
89 t = scnprintf(next, size, "%d\n", ci->fsm.a_bus_drop);
90 size -= t;
91 next += t;
92
93 return PAGE_SIZE - size;
94}
95
96static ssize_t
97a_bus_drop_store(struct device *dev, struct device_attribute *attr,
98 const char *buf, size_t count)
99{
100 struct ci_hdrc *ci = dev_get_drvdata(dev);
101
102 if (count > 2)
103 return -1;
104
105 mutex_lock(&ci->fsm.lock);
106 if (buf[0] == '0') {
107 ci->fsm.a_bus_drop = 0;
108 } else if (buf[0] == '1') {
109 ci->fsm.a_bus_drop = 1;
110 ci->fsm.a_bus_req = 0;
111 }
112
113 ci_otg_queue_work(ci);
114 mutex_unlock(&ci->fsm.lock);
115
116 return count;
117}
118static DEVICE_ATTR_RW(a_bus_drop);
119
120static ssize_t
121b_bus_req_show(struct device *dev, struct device_attribute *attr, char *buf)
122{
123 char *next;
124 unsigned size, t;
125 struct ci_hdrc *ci = dev_get_drvdata(dev);
126
127 next = buf;
128 size = PAGE_SIZE;
129 t = scnprintf(next, size, "%d\n", ci->fsm.b_bus_req);
130 size -= t;
131 next += t;
132
133 return PAGE_SIZE - size;
134}
135
136static ssize_t
137b_bus_req_store(struct device *dev, struct device_attribute *attr,
138 const char *buf, size_t count)
139{
140 struct ci_hdrc *ci = dev_get_drvdata(dev);
141
142 if (count > 2)
143 return -1;
144
145 mutex_lock(&ci->fsm.lock);
146 if (buf[0] == '0')
147 ci->fsm.b_bus_req = 0;
148 else if (buf[0] == '1') {
149 ci->fsm.b_bus_req = 1;
150 if (ci->fsm.otg->state == OTG_STATE_B_PERIPHERAL) {
151 ci->gadget.host_request_flag = 1;
152 mutex_unlock(&ci->fsm.lock);
153 return count;
154 }
155 }
156
157 ci_otg_queue_work(ci);
158 mutex_unlock(&ci->fsm.lock);
159
160 return count;
161}
162static DEVICE_ATTR_RW(b_bus_req);
163
164static ssize_t
165a_clr_err_store(struct device *dev, struct device_attribute *attr,
166 const char *buf, size_t count)
167{
168 struct ci_hdrc *ci = dev_get_drvdata(dev);
169
170 if (count > 2)
171 return -1;
172
173 mutex_lock(&ci->fsm.lock);
174 if (buf[0] == '1')
175 ci->fsm.a_clr_err = 1;
176
177 ci_otg_queue_work(ci);
178 mutex_unlock(&ci->fsm.lock);
179
180 return count;
181}
182static DEVICE_ATTR_WO(a_clr_err);
183
184static struct attribute *inputs_attrs[] = {
185 &dev_attr_a_bus_req.attr,
186 &dev_attr_a_bus_drop.attr,
187 &dev_attr_b_bus_req.attr,
188 &dev_attr_a_clr_err.attr,
189 NULL,
190};
191
192static const struct attribute_group inputs_attr_group = {
193 .name = "inputs",
194 .attrs = inputs_attrs,
195};
196
197
198
199
200
201static unsigned otg_timer_ms[] = {
202 TA_WAIT_VRISE,
203 TA_WAIT_VFALL,
204 TA_WAIT_BCON,
205 TA_AIDL_BDIS,
206 TB_ASE0_BRST,
207 TA_BIDL_ADIS,
208 TB_AIDL_BDIS,
209 TB_SE0_SRP,
210 TB_SRP_FAIL,
211 0,
212 TB_DATA_PLS,
213 TB_SSEND_SRP,
214};
215
216
217
218
219static void ci_otg_add_timer(struct ci_hdrc *ci, enum otg_fsm_timer t)
220{
221 unsigned long flags, timer_sec, timer_nsec;
222
223 if (t >= NUM_OTG_FSM_TIMERS)
224 return;
225
226 spin_lock_irqsave(&ci->lock, flags);
227 timer_sec = otg_timer_ms[t] / MSEC_PER_SEC;
228 timer_nsec = (otg_timer_ms[t] % MSEC_PER_SEC) * NSEC_PER_MSEC;
229 ci->hr_timeouts[t] = ktime_add(ktime_get(),
230 ktime_set(timer_sec, timer_nsec));
231 ci->enabled_otg_timer_bits |= (1 << t);
232 if ((ci->next_otg_timer == NUM_OTG_FSM_TIMERS) ||
233 ktime_after(ci->hr_timeouts[ci->next_otg_timer],
234 ci->hr_timeouts[t])) {
235 ci->next_otg_timer = t;
236 hrtimer_start_range_ns(&ci->otg_fsm_hrtimer,
237 ci->hr_timeouts[t], NSEC_PER_MSEC,
238 HRTIMER_MODE_ABS);
239 }
240 spin_unlock_irqrestore(&ci->lock, flags);
241}
242
243
244
245
246static void ci_otg_del_timer(struct ci_hdrc *ci, enum otg_fsm_timer t)
247{
248 unsigned long flags, enabled_timer_bits;
249 enum otg_fsm_timer cur_timer, next_timer = NUM_OTG_FSM_TIMERS;
250
251 if ((t >= NUM_OTG_FSM_TIMERS) ||
252 !(ci->enabled_otg_timer_bits & (1 << t)))
253 return;
254
255 spin_lock_irqsave(&ci->lock, flags);
256 ci->enabled_otg_timer_bits &= ~(1 << t);
257 if (ci->next_otg_timer == t) {
258 if (ci->enabled_otg_timer_bits == 0) {
259
260 hrtimer_cancel(&ci->otg_fsm_hrtimer);
261 ci->next_otg_timer = NUM_OTG_FSM_TIMERS;
262 } else {
263
264 enabled_timer_bits = ci->enabled_otg_timer_bits;
265 for_each_set_bit(cur_timer, &enabled_timer_bits,
266 NUM_OTG_FSM_TIMERS) {
267 if ((next_timer == NUM_OTG_FSM_TIMERS) ||
268 ktime_before(ci->hr_timeouts[next_timer],
269 ci->hr_timeouts[cur_timer]))
270 next_timer = cur_timer;
271 }
272 }
273 }
274 if (next_timer != NUM_OTG_FSM_TIMERS) {
275 ci->next_otg_timer = next_timer;
276 hrtimer_start_range_ns(&ci->otg_fsm_hrtimer,
277 ci->hr_timeouts[next_timer], NSEC_PER_MSEC,
278 HRTIMER_MODE_ABS);
279 }
280 spin_unlock_irqrestore(&ci->lock, flags);
281}
282
283
284static int a_wait_vrise_tmout(struct ci_hdrc *ci)
285{
286 ci->fsm.a_wait_vrise_tmout = 1;
287 return 0;
288}
289
290static int a_wait_vfall_tmout(struct ci_hdrc *ci)
291{
292 ci->fsm.a_wait_vfall_tmout = 1;
293 return 0;
294}
295
296static int a_wait_bcon_tmout(struct ci_hdrc *ci)
297{
298 ci->fsm.a_wait_bcon_tmout = 1;
299 return 0;
300}
301
302static int a_aidl_bdis_tmout(struct ci_hdrc *ci)
303{
304 ci->fsm.a_aidl_bdis_tmout = 1;
305 return 0;
306}
307
308static int b_ase0_brst_tmout(struct ci_hdrc *ci)
309{
310 ci->fsm.b_ase0_brst_tmout = 1;
311 return 0;
312}
313
314static int a_bidl_adis_tmout(struct ci_hdrc *ci)
315{
316 ci->fsm.a_bidl_adis_tmout = 1;
317 return 0;
318}
319
320static int b_aidl_bdis_tmout(struct ci_hdrc *ci)
321{
322 ci->fsm.a_bus_suspend = 1;
323 return 0;
324}
325
326static int b_se0_srp_tmout(struct ci_hdrc *ci)
327{
328 ci->fsm.b_se0_srp = 1;
329 return 0;
330}
331
332static int b_srp_fail_tmout(struct ci_hdrc *ci)
333{
334 ci->fsm.b_srp_done = 1;
335 return 1;
336}
337
338static int b_data_pls_tmout(struct ci_hdrc *ci)
339{
340 ci->fsm.b_srp_done = 1;
341 ci->fsm.b_bus_req = 0;
342 if (ci->fsm.power_up)
343 ci->fsm.power_up = 0;
344 hw_write_otgsc(ci, OTGSC_HABA, 0);
345 pm_runtime_put(ci->dev);
346 return 0;
347}
348
349static int b_ssend_srp_tmout(struct ci_hdrc *ci)
350{
351 ci->fsm.b_ssend_srp = 1;
352
353 if (ci->fsm.otg->state == OTG_STATE_B_IDLE)
354 return 0;
355 else
356 return 1;
357}
358
359
360
361
362
363static int (*otg_timer_handlers[])(struct ci_hdrc *) = {
364 a_wait_vrise_tmout,
365 a_wait_vfall_tmout,
366 a_wait_bcon_tmout,
367 a_aidl_bdis_tmout,
368 b_ase0_brst_tmout,
369 a_bidl_adis_tmout,
370 b_aidl_bdis_tmout,
371 b_se0_srp_tmout,
372 b_srp_fail_tmout,
373 NULL,
374 b_data_pls_tmout,
375 b_ssend_srp_tmout,
376};
377
378
379
380
381static enum hrtimer_restart ci_otg_hrtimer_func(struct hrtimer *t)
382{
383 struct ci_hdrc *ci = container_of(t, struct ci_hdrc, otg_fsm_hrtimer);
384 ktime_t now, *timeout;
385 unsigned long enabled_timer_bits;
386 unsigned long flags;
387 enum otg_fsm_timer cur_timer, next_timer = NUM_OTG_FSM_TIMERS;
388 int ret = -EINVAL;
389
390 spin_lock_irqsave(&ci->lock, flags);
391 enabled_timer_bits = ci->enabled_otg_timer_bits;
392 ci->next_otg_timer = NUM_OTG_FSM_TIMERS;
393
394 now = ktime_get();
395 for_each_set_bit(cur_timer, &enabled_timer_bits, NUM_OTG_FSM_TIMERS) {
396 if (ktime_compare(now, ci->hr_timeouts[cur_timer]) >= 0) {
397 ci->enabled_otg_timer_bits &= ~(1 << cur_timer);
398 if (otg_timer_handlers[cur_timer])
399 ret = otg_timer_handlers[cur_timer](ci);
400 } else {
401 if ((next_timer == NUM_OTG_FSM_TIMERS) ||
402 ktime_before(ci->hr_timeouts[cur_timer],
403 ci->hr_timeouts[next_timer]))
404 next_timer = cur_timer;
405 }
406 }
407
408 if (next_timer < NUM_OTG_FSM_TIMERS) {
409 timeout = &ci->hr_timeouts[next_timer];
410 hrtimer_start_range_ns(&ci->otg_fsm_hrtimer, *timeout,
411 NSEC_PER_MSEC, HRTIMER_MODE_ABS);
412 ci->next_otg_timer = next_timer;
413 }
414 spin_unlock_irqrestore(&ci->lock, flags);
415
416 if (!ret)
417 ci_otg_queue_work(ci);
418
419 return HRTIMER_NORESTART;
420}
421
422
423static int ci_otg_init_timers(struct ci_hdrc *ci)
424{
425 hrtimer_init(&ci->otg_fsm_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
426 ci->otg_fsm_hrtimer.function = ci_otg_hrtimer_func;
427
428 return 0;
429}
430
431
432
433
434static void ci_otg_fsm_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
435{
436 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
437
438 if (t < NUM_OTG_FSM_TIMERS)
439 ci_otg_add_timer(ci, t);
440 return;
441}
442
443static void ci_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
444{
445 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
446
447 if (t < NUM_OTG_FSM_TIMERS)
448 ci_otg_del_timer(ci, t);
449 return;
450}
451
452
453
454
455
456static void ci_otg_drv_vbus(struct otg_fsm *fsm, int on)
457{
458 int ret;
459 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
460
461 if (on) {
462
463 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP,
464 PORTSC_PP);
465 if (ci->platdata->reg_vbus) {
466 ret = regulator_enable(ci->platdata->reg_vbus);
467 if (ret) {
468 dev_err(ci->dev,
469 "Failed to enable vbus regulator, ret=%d\n",
470 ret);
471 return;
472 }
473 }
474
475 if (ci->platdata->flags & CI_HDRC_PHY_VBUS_CONTROL &&
476 ci->usb_phy && ci->usb_phy->set_vbus)
477 ci->usb_phy->set_vbus(ci->usb_phy, 1);
478
479
480 hw_write_otgsc(ci, OTGSC_DPIE, 0);
481
482 fsm->a_srp_det = 0;
483 fsm->power_up = 0;
484 } else {
485 if (ci->platdata->reg_vbus)
486 regulator_disable(ci->platdata->reg_vbus);
487
488 if (ci->platdata->flags & CI_HDRC_PHY_VBUS_CONTROL &&
489 ci->usb_phy && ci->usb_phy->set_vbus)
490 ci->usb_phy->set_vbus(ci->usb_phy, 0);
491
492 fsm->a_bus_drop = 1;
493 fsm->a_bus_req = 0;
494 }
495}
496
497
498
499
500static void ci_otg_loc_conn(struct otg_fsm *fsm, int on)
501{
502 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
503
504 if (on)
505 hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
506 else
507 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
508}
509
510
511
512
513
514
515
516
517
518
519static void ci_otg_loc_sof(struct otg_fsm *fsm, int on)
520{
521 struct usb_device *udev;
522
523 if (!fsm->otg->host)
524 return;
525
526 udev = usb_hub_find_child(fsm->otg->host->root_hub, 1);
527 if (!udev)
528 return;
529
530 if (on) {
531 usb_disable_autosuspend(udev);
532 } else {
533 pm_runtime_set_autosuspend_delay(&udev->dev, 0);
534 usb_enable_autosuspend(udev);
535 }
536}
537
538
539
540
541
542static void ci_otg_start_pulse(struct otg_fsm *fsm)
543{
544 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
545
546
547 hw_write_otgsc(ci, OTGSC_HADP, OTGSC_HADP);
548
549 pm_runtime_get(ci->dev);
550 ci_otg_add_timer(ci, B_DATA_PLS);
551}
552
553static int ci_otg_start_host(struct otg_fsm *fsm, int on)
554{
555 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
556
557 if (on) {
558 ci_role_stop(ci);
559 ci_role_start(ci, CI_ROLE_HOST);
560 } else {
561 ci_role_stop(ci);
562 ci_role_start(ci, CI_ROLE_GADGET);
563 }
564 return 0;
565}
566
567static int ci_otg_start_gadget(struct otg_fsm *fsm, int on)
568{
569 struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
570
571 if (on)
572 usb_gadget_vbus_connect(&ci->gadget);
573 else
574 usb_gadget_vbus_disconnect(&ci->gadget);
575
576 return 0;
577}
578
579static struct otg_fsm_ops ci_otg_ops = {
580 .drv_vbus = ci_otg_drv_vbus,
581 .loc_conn = ci_otg_loc_conn,
582 .loc_sof = ci_otg_loc_sof,
583 .start_pulse = ci_otg_start_pulse,
584 .add_timer = ci_otg_fsm_add_timer,
585 .del_timer = ci_otg_fsm_del_timer,
586 .start_host = ci_otg_start_host,
587 .start_gadget = ci_otg_start_gadget,
588};
589
590int ci_otg_fsm_work(struct ci_hdrc *ci)
591{
592
593
594
595
596 if (ci->fsm.id && !(ci->driver) &&
597 ci->fsm.otg->state < OTG_STATE_A_IDLE)
598 return 0;
599
600 pm_runtime_get_sync(ci->dev);
601 if (otg_statemachine(&ci->fsm)) {
602 if (ci->fsm.otg->state == OTG_STATE_A_IDLE) {
603
604
605
606
607
608
609
610
611 if ((ci->fsm.id) || (ci->id_event) ||
612 (ci->fsm.power_up)) {
613 ci_otg_queue_work(ci);
614 } else {
615
616 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS |
617 PORTSC_PP, 0);
618 hw_write_otgsc(ci, OTGSC_DPIS, OTGSC_DPIS);
619 hw_write_otgsc(ci, OTGSC_DPIE, OTGSC_DPIE);
620 }
621 if (ci->id_event)
622 ci->id_event = false;
623 } else if (ci->fsm.otg->state == OTG_STATE_B_IDLE) {
624 if (ci->fsm.b_sess_vld) {
625 ci->fsm.power_up = 0;
626
627
628
629
630 ci_otg_queue_work(ci);
631 }
632 } else if (ci->fsm.otg->state == OTG_STATE_A_HOST) {
633 pm_runtime_mark_last_busy(ci->dev);
634 pm_runtime_put_autosuspend(ci->dev);
635 return 0;
636 }
637 }
638 pm_runtime_put_sync(ci->dev);
639 return 0;
640}
641
642
643
644
645
646static void ci_otg_fsm_event(struct ci_hdrc *ci)
647{
648 u32 intr_sts, otg_bsess_vld, port_conn;
649 struct otg_fsm *fsm = &ci->fsm;
650
651 intr_sts = hw_read_intr_status(ci);
652 otg_bsess_vld = hw_read_otgsc(ci, OTGSC_BSV);
653 port_conn = hw_read(ci, OP_PORTSC, PORTSC_CCS);
654
655 switch (ci->fsm.otg->state) {
656 case OTG_STATE_A_WAIT_BCON:
657 if (port_conn) {
658 fsm->b_conn = 1;
659 fsm->a_bus_req = 1;
660 ci_otg_queue_work(ci);
661 }
662 break;
663 case OTG_STATE_B_IDLE:
664 if (otg_bsess_vld && (intr_sts & USBi_PCI) && port_conn) {
665 fsm->b_sess_vld = 1;
666 ci_otg_queue_work(ci);
667 }
668 break;
669 case OTG_STATE_B_PERIPHERAL:
670 if ((intr_sts & USBi_SLI) && port_conn && otg_bsess_vld) {
671 ci_otg_add_timer(ci, B_AIDL_BDIS);
672 } else if (intr_sts & USBi_PCI) {
673 ci_otg_del_timer(ci, B_AIDL_BDIS);
674 if (fsm->a_bus_suspend == 1)
675 fsm->a_bus_suspend = 0;
676 }
677 break;
678 case OTG_STATE_B_HOST:
679 if ((intr_sts & USBi_PCI) && !port_conn) {
680 fsm->a_conn = 0;
681 fsm->b_bus_req = 0;
682 ci_otg_queue_work(ci);
683 }
684 break;
685 case OTG_STATE_A_PERIPHERAL:
686 if (intr_sts & USBi_SLI) {
687 fsm->b_bus_suspend = 1;
688
689
690
691
692
693 ci_otg_add_timer(ci, A_BIDL_ADIS);
694 }
695
696 if (intr_sts & USBi_URI)
697 ci_otg_del_timer(ci, A_BIDL_ADIS);
698
699 if (intr_sts & USBi_PCI) {
700 if (fsm->b_bus_suspend == 1) {
701 ci_otg_del_timer(ci, A_BIDL_ADIS);
702 fsm->b_bus_suspend = 0;
703 }
704 }
705 break;
706 case OTG_STATE_A_SUSPEND:
707 if ((intr_sts & USBi_PCI) && !port_conn) {
708 fsm->b_conn = 0;
709
710
711 if (ci->driver) {
712
713 ci->gadget.is_a_peripheral = 1;
714 }
715 ci_otg_queue_work(ci);
716 }
717 break;
718 case OTG_STATE_A_HOST:
719 if ((intr_sts & USBi_PCI) && !port_conn) {
720 fsm->b_conn = 0;
721 ci_otg_queue_work(ci);
722 }
723 break;
724 case OTG_STATE_B_WAIT_ACON:
725 if ((intr_sts & USBi_PCI) && port_conn) {
726 fsm->a_conn = 1;
727 ci_otg_queue_work(ci);
728 }
729 break;
730 default:
731 break;
732 }
733}
734
735
736
737
738
739
740
741irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
742{
743 irqreturn_t retval = IRQ_NONE;
744 u32 otgsc, otg_int_src = 0;
745 struct otg_fsm *fsm = &ci->fsm;
746
747 otgsc = hw_read_otgsc(ci, ~0);
748 otg_int_src = otgsc & OTGSC_INT_STATUS_BITS & (otgsc >> 8);
749 fsm->id = (otgsc & OTGSC_ID) ? 1 : 0;
750
751 if (otg_int_src) {
752 if (otg_int_src & OTGSC_DPIS) {
753 hw_write_otgsc(ci, OTGSC_DPIS, OTGSC_DPIS);
754 fsm->a_srp_det = 1;
755 fsm->a_bus_drop = 0;
756 } else if (otg_int_src & OTGSC_IDIS) {
757 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS);
758 if (fsm->id == 0) {
759 fsm->a_bus_drop = 0;
760 fsm->a_bus_req = 1;
761 ci->id_event = true;
762 }
763 } else if (otg_int_src & OTGSC_BSVIS) {
764 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS);
765 if (otgsc & OTGSC_BSV) {
766 fsm->b_sess_vld = 1;
767 ci_otg_del_timer(ci, B_SSEND_SRP);
768 ci_otg_del_timer(ci, B_SRP_FAIL);
769 fsm->b_ssend_srp = 0;
770 } else {
771 fsm->b_sess_vld = 0;
772 if (fsm->id)
773 ci_otg_add_timer(ci, B_SSEND_SRP);
774 }
775 } else if (otg_int_src & OTGSC_AVVIS) {
776 hw_write_otgsc(ci, OTGSC_AVVIS, OTGSC_AVVIS);
777 if (otgsc & OTGSC_AVV) {
778 fsm->a_vbus_vld = 1;
779 } else {
780 fsm->a_vbus_vld = 0;
781 fsm->b_conn = 0;
782 }
783 }
784 ci_otg_queue_work(ci);
785 return IRQ_HANDLED;
786 }
787
788 ci_otg_fsm_event(ci);
789
790 return retval;
791}
792
793void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
794{
795 ci_otg_queue_work(ci);
796}
797
798int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
799{
800 int retval = 0;
801
802 if (ci->phy)
803 ci->otg.phy = ci->phy;
804 else
805 ci->otg.usb_phy = ci->usb_phy;
806
807 ci->otg.gadget = &ci->gadget;
808 ci->fsm.otg = &ci->otg;
809 ci->fsm.power_up = 1;
810 ci->fsm.id = hw_read_otgsc(ci, OTGSC_ID) ? 1 : 0;
811 ci->fsm.otg->state = OTG_STATE_UNDEFINED;
812 ci->fsm.ops = &ci_otg_ops;
813 ci->gadget.hnp_polling_support = 1;
814 ci->fsm.host_req_flag = devm_kzalloc(ci->dev, 1, GFP_KERNEL);
815 if (!ci->fsm.host_req_flag)
816 return -ENOMEM;
817
818 mutex_init(&ci->fsm.lock);
819
820 retval = ci_otg_init_timers(ci);
821 if (retval) {
822 dev_err(ci->dev, "Couldn't init OTG timers\n");
823 return retval;
824 }
825 ci->enabled_otg_timer_bits = 0;
826 ci->next_otg_timer = NUM_OTG_FSM_TIMERS;
827
828 retval = sysfs_create_group(&ci->dev->kobj, &inputs_attr_group);
829 if (retval < 0) {
830 dev_dbg(ci->dev,
831 "Can't register sysfs attr group: %d\n", retval);
832 return retval;
833 }
834
835
836 hw_write_otgsc(ci, OTGSC_AVVIE, OTGSC_AVVIE);
837
838 if (ci->fsm.id) {
839 ci->fsm.b_ssend_srp =
840 hw_read_otgsc(ci, OTGSC_BSV) ? 0 : 1;
841 ci->fsm.b_sess_vld =
842 hw_read_otgsc(ci, OTGSC_BSV) ? 1 : 0;
843
844 hw_write_otgsc(ci, OTGSC_BSVIE, OTGSC_BSVIE);
845 }
846
847 return 0;
848}
849
850void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
851{
852 sysfs_remove_group(&ci->dev->kobj, &inputs_attr_group);
853}
854
