This source file includes following definitions.
- gb_interface_dme_attr_get
- gb_interface_read_ara_dme
- gb_interface_read_dme
- gb_interface_route_create
- gb_interface_route_destroy
- gb_interface_legacy_mode_switch
- gb_interface_mailbox_event
- gb_interface_mode_switch_work
- gb_interface_request_mode_switch
- gb_interface_read_and_clear_init_status
- voltage_now_show
- current_now_show
- power_now_show
- power_state_show
- power_state_store
- gb_interface_type_string
- interface_type_show
- interface_unipro_is_visible
- interface_greybus_is_visible
- interface_power_is_visible
- gb_interface_release
- gb_interface_suspend
- gb_interface_resume
- gb_interface_runtime_idle
- gb_interface_create
- gb_interface_vsys_set
- gb_interface_refclk_set
- gb_interface_unipro_set
- gb_interface_activate_operation
- gb_interface_hibernate_link
- _gb_interface_activate
- _gb_interface_activate_es3_hack
- gb_interface_activate
- gb_interface_deactivate
- gb_interface_enable
- gb_interface_disable
- gb_interface_add
- gb_interface_del
- gb_interface_put
1
2
3
4
5
6
7
8
9 #include <linux/delay.h>
10 #include <linux/greybus.h>
11
12 #include "greybus_trace.h"
13
14 #define GB_INTERFACE_MODE_SWITCH_TIMEOUT 2000
15
16 #define GB_INTERFACE_DEVICE_ID_BAD 0xff
17
18 #define GB_INTERFACE_AUTOSUSPEND_MS 3000
19
20
21 #define GB_INTERFACE_SUSPEND_HIBERNATE_DELAY_MS 20
22
23
24 #define DME_SELECTOR_INDEX_NULL 0
25
26
27
28 #define DME_T_TST_SRC_INCREMENT 0x4083
29
30 #define DME_DDBL1_MANUFACTURERID 0x5003
31 #define DME_DDBL1_PRODUCTID 0x5004
32
33 #define DME_TOSHIBA_GMP_VID 0x6000
34 #define DME_TOSHIBA_GMP_PID 0x6001
35 #define DME_TOSHIBA_GMP_SN0 0x6002
36 #define DME_TOSHIBA_GMP_SN1 0x6003
37 #define DME_TOSHIBA_GMP_INIT_STATUS 0x6101
38
39
40 #define TOSHIBA_DMID 0x0126
41 #define TOSHIBA_ES2_BRIDGE_DPID 0x1000
42 #define TOSHIBA_ES3_APBRIDGE_DPID 0x1001
43 #define TOSHIBA_ES3_GBPHY_DPID 0x1002
44
45 static int gb_interface_hibernate_link(struct gb_interface *intf);
46 static int gb_interface_refclk_set(struct gb_interface *intf, bool enable);
47
48 static int gb_interface_dme_attr_get(struct gb_interface *intf,
49 u16 attr, u32 *val)
50 {
51 return gb_svc_dme_peer_get(intf->hd->svc, intf->interface_id,
52 attr, DME_SELECTOR_INDEX_NULL, val);
53 }
54
55 static int gb_interface_read_ara_dme(struct gb_interface *intf)
56 {
57 u32 sn0, sn1;
58 int ret;
59
60
61
62
63
64 if (intf->ddbl1_manufacturer_id != TOSHIBA_DMID) {
65 dev_err(&intf->dev, "unknown manufacturer %08x\n",
66 intf->ddbl1_manufacturer_id);
67 return -ENODEV;
68 }
69
70 ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_VID,
71 &intf->vendor_id);
72 if (ret)
73 return ret;
74
75 ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_PID,
76 &intf->product_id);
77 if (ret)
78 return ret;
79
80 ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_SN0, &sn0);
81 if (ret)
82 return ret;
83
84 ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_SN1, &sn1);
85 if (ret)
86 return ret;
87
88 intf->serial_number = (u64)sn1 << 32 | sn0;
89
90 return 0;
91 }
92
93 static int gb_interface_read_dme(struct gb_interface *intf)
94 {
95 int ret;
96
97
98 if (intf->dme_read)
99 return 0;
100
101 ret = gb_interface_dme_attr_get(intf, DME_DDBL1_MANUFACTURERID,
102 &intf->ddbl1_manufacturer_id);
103 if (ret)
104 return ret;
105
106 ret = gb_interface_dme_attr_get(intf, DME_DDBL1_PRODUCTID,
107 &intf->ddbl1_product_id);
108 if (ret)
109 return ret;
110
111 if (intf->ddbl1_manufacturer_id == TOSHIBA_DMID &&
112 intf->ddbl1_product_id == TOSHIBA_ES2_BRIDGE_DPID) {
113 intf->quirks |= GB_INTERFACE_QUIRK_NO_GMP_IDS;
114 intf->quirks |= GB_INTERFACE_QUIRK_NO_INIT_STATUS;
115 }
116
117 ret = gb_interface_read_ara_dme(intf);
118 if (ret)
119 return ret;
120
121 intf->dme_read = true;
122
123 return 0;
124 }
125
126 static int gb_interface_route_create(struct gb_interface *intf)
127 {
128 struct gb_svc *svc = intf->hd->svc;
129 u8 intf_id = intf->interface_id;
130 u8 device_id;
131 int ret;
132
133
134 ret = ida_simple_get(&svc->device_id_map,
135 GB_SVC_DEVICE_ID_MIN, GB_SVC_DEVICE_ID_MAX + 1,
136 GFP_KERNEL);
137 if (ret < 0) {
138 dev_err(&intf->dev, "failed to allocate device id: %d\n", ret);
139 return ret;
140 }
141 device_id = ret;
142
143 ret = gb_svc_intf_device_id(svc, intf_id, device_id);
144 if (ret) {
145 dev_err(&intf->dev, "failed to set device id %u: %d\n",
146 device_id, ret);
147 goto err_ida_remove;
148 }
149
150
151 ret = gb_svc_route_create(svc, svc->ap_intf_id, GB_SVC_DEVICE_ID_AP,
152 intf_id, device_id);
153 if (ret) {
154 dev_err(&intf->dev, "failed to create route: %d\n", ret);
155 goto err_svc_id_free;
156 }
157
158 intf->device_id = device_id;
159
160 return 0;
161
162 err_svc_id_free:
163
164
165
166
167 err_ida_remove:
168 ida_simple_remove(&svc->device_id_map, device_id);
169
170 return ret;
171 }
172
173 static void gb_interface_route_destroy(struct gb_interface *intf)
174 {
175 struct gb_svc *svc = intf->hd->svc;
176
177 if (intf->device_id == GB_INTERFACE_DEVICE_ID_BAD)
178 return;
179
180 gb_svc_route_destroy(svc, svc->ap_intf_id, intf->interface_id);
181 ida_simple_remove(&svc->device_id_map, intf->device_id);
182 intf->device_id = GB_INTERFACE_DEVICE_ID_BAD;
183 }
184
185
186 static int gb_interface_legacy_mode_switch(struct gb_interface *intf)
187 {
188 int ret;
189
190 dev_info(&intf->dev, "legacy mode switch detected\n");
191
192
193 intf->disconnected = true;
194 gb_interface_disable(intf);
195 intf->disconnected = false;
196
197 ret = gb_interface_enable(intf);
198 if (ret) {
199 dev_err(&intf->dev, "failed to re-enable interface: %d\n", ret);
200 gb_interface_deactivate(intf);
201 }
202
203 return ret;
204 }
205
206 void gb_interface_mailbox_event(struct gb_interface *intf, u16 result,
207 u32 mailbox)
208 {
209 mutex_lock(&intf->mutex);
210
211 if (result) {
212 dev_warn(&intf->dev,
213 "mailbox event with UniPro error: 0x%04x\n",
214 result);
215 goto err_disable;
216 }
217
218 if (mailbox != GB_SVC_INTF_MAILBOX_GREYBUS) {
219 dev_warn(&intf->dev,
220 "mailbox event with unexpected value: 0x%08x\n",
221 mailbox);
222 goto err_disable;
223 }
224
225 if (intf->quirks & GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH) {
226 gb_interface_legacy_mode_switch(intf);
227 goto out_unlock;
228 }
229
230 if (!intf->mode_switch) {
231 dev_warn(&intf->dev, "unexpected mailbox event: 0x%08x\n",
232 mailbox);
233 goto err_disable;
234 }
235
236 dev_info(&intf->dev, "mode switch detected\n");
237
238 complete(&intf->mode_switch_completion);
239
240 out_unlock:
241 mutex_unlock(&intf->mutex);
242
243 return;
244
245 err_disable:
246 gb_interface_disable(intf);
247 gb_interface_deactivate(intf);
248 mutex_unlock(&intf->mutex);
249 }
250
251 static void gb_interface_mode_switch_work(struct work_struct *work)
252 {
253 struct gb_interface *intf;
254 struct gb_control *control;
255 unsigned long timeout;
256 int ret;
257
258 intf = container_of(work, struct gb_interface, mode_switch_work);
259
260 mutex_lock(&intf->mutex);
261
262 if (!intf->enabled) {
263 dev_dbg(&intf->dev, "mode switch aborted\n");
264 intf->mode_switch = false;
265 mutex_unlock(&intf->mutex);
266 goto out_interface_put;
267 }
268
269
270
271
272
273 control = gb_control_get(intf->control);
274 gb_control_mode_switch_prepare(control);
275 gb_interface_disable(intf);
276 mutex_unlock(&intf->mutex);
277
278 timeout = msecs_to_jiffies(GB_INTERFACE_MODE_SWITCH_TIMEOUT);
279 ret = wait_for_completion_interruptible_timeout(
280 &intf->mode_switch_completion, timeout);
281
282
283 gb_control_mode_switch_complete(control);
284 gb_control_put(control);
285
286 if (ret < 0) {
287 dev_err(&intf->dev, "mode switch interrupted\n");
288 goto err_deactivate;
289 } else if (ret == 0) {
290 dev_err(&intf->dev, "mode switch timed out\n");
291 goto err_deactivate;
292 }
293
294
295 mutex_lock(&intf->mutex);
296 intf->mode_switch = false;
297 if (intf->active) {
298 ret = gb_interface_enable(intf);
299 if (ret) {
300 dev_err(&intf->dev, "failed to re-enable interface: %d\n",
301 ret);
302 gb_interface_deactivate(intf);
303 }
304 }
305 mutex_unlock(&intf->mutex);
306
307 out_interface_put:
308 gb_interface_put(intf);
309
310 return;
311
312 err_deactivate:
313 mutex_lock(&intf->mutex);
314 intf->mode_switch = false;
315 gb_interface_deactivate(intf);
316 mutex_unlock(&intf->mutex);
317
318 gb_interface_put(intf);
319 }
320
321 int gb_interface_request_mode_switch(struct gb_interface *intf)
322 {
323 int ret = 0;
324
325 mutex_lock(&intf->mutex);
326 if (intf->mode_switch) {
327 ret = -EBUSY;
328 goto out_unlock;
329 }
330
331 intf->mode_switch = true;
332 reinit_completion(&intf->mode_switch_completion);
333
334
335
336
337
338 get_device(&intf->dev);
339
340 if (!queue_work(system_long_wq, &intf->mode_switch_work)) {
341 put_device(&intf->dev);
342 ret = -EBUSY;
343 goto out_unlock;
344 }
345
346 out_unlock:
347 mutex_unlock(&intf->mutex);
348
349 return ret;
350 }
351 EXPORT_SYMBOL_GPL(gb_interface_request_mode_switch);
352
353
354
355
356
357
358
359
360
361 static int gb_interface_read_and_clear_init_status(struct gb_interface *intf)
362 {
363 struct gb_host_device *hd = intf->hd;
364 unsigned long bootrom_quirks;
365 unsigned long s2l_quirks;
366 int ret;
367 u32 value;
368 u16 attr;
369 u8 init_status;
370
371
372
373
374
375
376 if (intf->quirks & GB_INTERFACE_QUIRK_NO_INIT_STATUS)
377 attr = DME_T_TST_SRC_INCREMENT;
378 else
379 attr = DME_TOSHIBA_GMP_INIT_STATUS;
380
381 ret = gb_svc_dme_peer_get(hd->svc, intf->interface_id, attr,
382 DME_SELECTOR_INDEX_NULL, &value);
383 if (ret)
384 return ret;
385
386
387
388
389
390 if (!value) {
391 dev_err(&intf->dev, "invalid init status\n");
392 return -ENODEV;
393 }
394
395
396
397
398
399
400
401
402
403 if (intf->quirks & GB_INTERFACE_QUIRK_NO_INIT_STATUS)
404 init_status = value & 0xff;
405 else
406 init_status = value >> 24;
407
408
409
410
411
412 bootrom_quirks = GB_INTERFACE_QUIRK_NO_CPORT_FEATURES |
413 GB_INTERFACE_QUIRK_FORCED_DISABLE |
414 GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH |
415 GB_INTERFACE_QUIRK_NO_BUNDLE_ACTIVATE;
416
417 s2l_quirks = GB_INTERFACE_QUIRK_NO_PM;
418
419 switch (init_status) {
420 case GB_INIT_BOOTROM_UNIPRO_BOOT_STARTED:
421 case GB_INIT_BOOTROM_FALLBACK_UNIPRO_BOOT_STARTED:
422 intf->quirks |= bootrom_quirks;
423 break;
424 case GB_INIT_S2_LOADER_BOOT_STARTED:
425
426 intf->quirks &= ~bootrom_quirks;
427 intf->quirks |= s2l_quirks;
428 break;
429 default:
430 intf->quirks &= ~bootrom_quirks;
431 intf->quirks &= ~s2l_quirks;
432 }
433
434
435 return gb_svc_dme_peer_set(hd->svc, intf->interface_id, attr,
436 DME_SELECTOR_INDEX_NULL, 0);
437 }
438
439
440 #define gb_interface_attr(field, type) \
441 static ssize_t field##_show(struct device *dev, \
442 struct device_attribute *attr, \
443 char *buf) \
444 { \
445 struct gb_interface *intf = to_gb_interface(dev); \
446 return scnprintf(buf, PAGE_SIZE, type"\n", intf->field); \
447 } \
448 static DEVICE_ATTR_RO(field)
449
450 gb_interface_attr(ddbl1_manufacturer_id, "0x%08x");
451 gb_interface_attr(ddbl1_product_id, "0x%08x");
452 gb_interface_attr(interface_id, "%u");
453 gb_interface_attr(vendor_id, "0x%08x");
454 gb_interface_attr(product_id, "0x%08x");
455 gb_interface_attr(serial_number, "0x%016llx");
456
457 static ssize_t voltage_now_show(struct device *dev,
458 struct device_attribute *attr, char *buf)
459 {
460 struct gb_interface *intf = to_gb_interface(dev);
461 int ret;
462 u32 measurement;
463
464 ret = gb_svc_pwrmon_intf_sample_get(intf->hd->svc, intf->interface_id,
465 GB_SVC_PWRMON_TYPE_VOL,
466 &measurement);
467 if (ret) {
468 dev_err(&intf->dev, "failed to get voltage sample (%d)\n", ret);
469 return ret;
470 }
471
472 return sprintf(buf, "%u\n", measurement);
473 }
474 static DEVICE_ATTR_RO(voltage_now);
475
476 static ssize_t current_now_show(struct device *dev,
477 struct device_attribute *attr, char *buf)
478 {
479 struct gb_interface *intf = to_gb_interface(dev);
480 int ret;
481 u32 measurement;
482
483 ret = gb_svc_pwrmon_intf_sample_get(intf->hd->svc, intf->interface_id,
484 GB_SVC_PWRMON_TYPE_CURR,
485 &measurement);
486 if (ret) {
487 dev_err(&intf->dev, "failed to get current sample (%d)\n", ret);
488 return ret;
489 }
490
491 return sprintf(buf, "%u\n", measurement);
492 }
493 static DEVICE_ATTR_RO(current_now);
494
495 static ssize_t power_now_show(struct device *dev,
496 struct device_attribute *attr, char *buf)
497 {
498 struct gb_interface *intf = to_gb_interface(dev);
499 int ret;
500 u32 measurement;
501
502 ret = gb_svc_pwrmon_intf_sample_get(intf->hd->svc, intf->interface_id,
503 GB_SVC_PWRMON_TYPE_PWR,
504 &measurement);
505 if (ret) {
506 dev_err(&intf->dev, "failed to get power sample (%d)\n", ret);
507 return ret;
508 }
509
510 return sprintf(buf, "%u\n", measurement);
511 }
512 static DEVICE_ATTR_RO(power_now);
513
514 static ssize_t power_state_show(struct device *dev,
515 struct device_attribute *attr, char *buf)
516 {
517 struct gb_interface *intf = to_gb_interface(dev);
518
519 if (intf->active)
520 return scnprintf(buf, PAGE_SIZE, "on\n");
521 else
522 return scnprintf(buf, PAGE_SIZE, "off\n");
523 }
524
525 static ssize_t power_state_store(struct device *dev,
526 struct device_attribute *attr, const char *buf,
527 size_t len)
528 {
529 struct gb_interface *intf = to_gb_interface(dev);
530 bool activate;
531 int ret = 0;
532
533 if (kstrtobool(buf, &activate))
534 return -EINVAL;
535
536 mutex_lock(&intf->mutex);
537
538 if (activate == intf->active)
539 goto unlock;
540
541 if (activate) {
542 ret = gb_interface_activate(intf);
543 if (ret) {
544 dev_err(&intf->dev,
545 "failed to activate interface: %d\n", ret);
546 goto unlock;
547 }
548
549 ret = gb_interface_enable(intf);
550 if (ret) {
551 dev_err(&intf->dev,
552 "failed to enable interface: %d\n", ret);
553 gb_interface_deactivate(intf);
554 goto unlock;
555 }
556 } else {
557 gb_interface_disable(intf);
558 gb_interface_deactivate(intf);
559 }
560
561 unlock:
562 mutex_unlock(&intf->mutex);
563
564 if (ret)
565 return ret;
566
567 return len;
568 }
569 static DEVICE_ATTR_RW(power_state);
570
571 static const char *gb_interface_type_string(struct gb_interface *intf)
572 {
573 static const char * const types[] = {
574 [GB_INTERFACE_TYPE_INVALID] = "invalid",
575 [GB_INTERFACE_TYPE_UNKNOWN] = "unknown",
576 [GB_INTERFACE_TYPE_DUMMY] = "dummy",
577 [GB_INTERFACE_TYPE_UNIPRO] = "unipro",
578 [GB_INTERFACE_TYPE_GREYBUS] = "greybus",
579 };
580
581 return types[intf->type];
582 }
583
584 static ssize_t interface_type_show(struct device *dev,
585 struct device_attribute *attr, char *buf)
586 {
587 struct gb_interface *intf = to_gb_interface(dev);
588
589 return sprintf(buf, "%s\n", gb_interface_type_string(intf));
590 }
591 static DEVICE_ATTR_RO(interface_type);
592
593 static struct attribute *interface_unipro_attrs[] = {
594 &dev_attr_ddbl1_manufacturer_id.attr,
595 &dev_attr_ddbl1_product_id.attr,
596 NULL
597 };
598
599 static struct attribute *interface_greybus_attrs[] = {
600 &dev_attr_vendor_id.attr,
601 &dev_attr_product_id.attr,
602 &dev_attr_serial_number.attr,
603 NULL
604 };
605
606 static struct attribute *interface_power_attrs[] = {
607 &dev_attr_voltage_now.attr,
608 &dev_attr_current_now.attr,
609 &dev_attr_power_now.attr,
610 &dev_attr_power_state.attr,
611 NULL
612 };
613
614 static struct attribute *interface_common_attrs[] = {
615 &dev_attr_interface_id.attr,
616 &dev_attr_interface_type.attr,
617 NULL
618 };
619
620 static umode_t interface_unipro_is_visible(struct kobject *kobj,
621 struct attribute *attr, int n)
622 {
623 struct device *dev = container_of(kobj, struct device, kobj);
624 struct gb_interface *intf = to_gb_interface(dev);
625
626 switch (intf->type) {
627 case GB_INTERFACE_TYPE_UNIPRO:
628 case GB_INTERFACE_TYPE_GREYBUS:
629 return attr->mode;
630 default:
631 return 0;
632 }
633 }
634
635 static umode_t interface_greybus_is_visible(struct kobject *kobj,
636 struct attribute *attr, int n)
637 {
638 struct device *dev = container_of(kobj, struct device, kobj);
639 struct gb_interface *intf = to_gb_interface(dev);
640
641 switch (intf->type) {
642 case GB_INTERFACE_TYPE_GREYBUS:
643 return attr->mode;
644 default:
645 return 0;
646 }
647 }
648
649 static umode_t interface_power_is_visible(struct kobject *kobj,
650 struct attribute *attr, int n)
651 {
652 struct device *dev = container_of(kobj, struct device, kobj);
653 struct gb_interface *intf = to_gb_interface(dev);
654
655 switch (intf->type) {
656 case GB_INTERFACE_TYPE_UNIPRO:
657 case GB_INTERFACE_TYPE_GREYBUS:
658 return attr->mode;
659 default:
660 return 0;
661 }
662 }
663
664 static const struct attribute_group interface_unipro_group = {
665 .is_visible = interface_unipro_is_visible,
666 .attrs = interface_unipro_attrs,
667 };
668
669 static const struct attribute_group interface_greybus_group = {
670 .is_visible = interface_greybus_is_visible,
671 .attrs = interface_greybus_attrs,
672 };
673
674 static const struct attribute_group interface_power_group = {
675 .is_visible = interface_power_is_visible,
676 .attrs = interface_power_attrs,
677 };
678
679 static const struct attribute_group interface_common_group = {
680 .attrs = interface_common_attrs,
681 };
682
683 static const struct attribute_group *interface_groups[] = {
684 &interface_unipro_group,
685 &interface_greybus_group,
686 &interface_power_group,
687 &interface_common_group,
688 NULL
689 };
690
691 static void gb_interface_release(struct device *dev)
692 {
693 struct gb_interface *intf = to_gb_interface(dev);
694
695 trace_gb_interface_release(intf);
696
697 kfree(intf);
698 }
699
700 #ifdef CONFIG_PM
701 static int gb_interface_suspend(struct device *dev)
702 {
703 struct gb_interface *intf = to_gb_interface(dev);
704 int ret;
705
706 ret = gb_control_interface_suspend_prepare(intf->control);
707 if (ret)
708 return ret;
709
710 ret = gb_control_suspend(intf->control);
711 if (ret)
712 goto err_hibernate_abort;
713
714 ret = gb_interface_hibernate_link(intf);
715 if (ret)
716 return ret;
717
718
719 msleep(GB_INTERFACE_SUSPEND_HIBERNATE_DELAY_MS);
720
721 ret = gb_interface_refclk_set(intf, false);
722 if (ret)
723 return ret;
724
725 return 0;
726
727 err_hibernate_abort:
728 gb_control_interface_hibernate_abort(intf->control);
729
730 return ret;
731 }
732
733 static int gb_interface_resume(struct device *dev)
734 {
735 struct gb_interface *intf = to_gb_interface(dev);
736 struct gb_svc *svc = intf->hd->svc;
737 int ret;
738
739 ret = gb_interface_refclk_set(intf, true);
740 if (ret)
741 return ret;
742
743 ret = gb_svc_intf_resume(svc, intf->interface_id);
744 if (ret)
745 return ret;
746
747 ret = gb_control_resume(intf->control);
748 if (ret)
749 return ret;
750
751 return 0;
752 }
753
754 static int gb_interface_runtime_idle(struct device *dev)
755 {
756 pm_runtime_mark_last_busy(dev);
757 pm_request_autosuspend(dev);
758
759 return 0;
760 }
761 #endif
762
763 static const struct dev_pm_ops gb_interface_pm_ops = {
764 SET_RUNTIME_PM_OPS(gb_interface_suspend, gb_interface_resume,
765 gb_interface_runtime_idle)
766 };
767
768 struct device_type greybus_interface_type = {
769 .name = "greybus_interface",
770 .release = gb_interface_release,
771 .pm = &gb_interface_pm_ops,
772 };
773
774
775
776
777
778
779
780
781
782
783
784
785
786 struct gb_interface *gb_interface_create(struct gb_module *module,
787 u8 interface_id)
788 {
789 struct gb_host_device *hd = module->hd;
790 struct gb_interface *intf;
791
792 intf = kzalloc(sizeof(*intf), GFP_KERNEL);
793 if (!intf)
794 return NULL;
795
796 intf->hd = hd;
797 intf->module = module;
798 intf->interface_id = interface_id;
799 INIT_LIST_HEAD(&intf->bundles);
800 INIT_LIST_HEAD(&intf->manifest_descs);
801 mutex_init(&intf->mutex);
802 INIT_WORK(&intf->mode_switch_work, gb_interface_mode_switch_work);
803 init_completion(&intf->mode_switch_completion);
804
805
806 intf->device_id = GB_INTERFACE_DEVICE_ID_BAD;
807
808 intf->dev.parent = &module->dev;
809 intf->dev.bus = &greybus_bus_type;
810 intf->dev.type = &greybus_interface_type;
811 intf->dev.groups = interface_groups;
812 intf->dev.dma_mask = module->dev.dma_mask;
813 device_initialize(&intf->dev);
814 dev_set_name(&intf->dev, "%s.%u", dev_name(&module->dev),
815 interface_id);
816
817 pm_runtime_set_autosuspend_delay(&intf->dev,
818 GB_INTERFACE_AUTOSUSPEND_MS);
819
820 trace_gb_interface_create(intf);
821
822 return intf;
823 }
824
825 static int gb_interface_vsys_set(struct gb_interface *intf, bool enable)
826 {
827 struct gb_svc *svc = intf->hd->svc;
828 int ret;
829
830 dev_dbg(&intf->dev, "%s - %d\n", __func__, enable);
831
832 ret = gb_svc_intf_vsys_set(svc, intf->interface_id, enable);
833 if (ret) {
834 dev_err(&intf->dev, "failed to set v_sys: %d\n", ret);
835 return ret;
836 }
837
838 return 0;
839 }
840
841 static int gb_interface_refclk_set(struct gb_interface *intf, bool enable)
842 {
843 struct gb_svc *svc = intf->hd->svc;
844 int ret;
845
846 dev_dbg(&intf->dev, "%s - %d\n", __func__, enable);
847
848 ret = gb_svc_intf_refclk_set(svc, intf->interface_id, enable);
849 if (ret) {
850 dev_err(&intf->dev, "failed to set refclk: %d\n", ret);
851 return ret;
852 }
853
854 return 0;
855 }
856
857 static int gb_interface_unipro_set(struct gb_interface *intf, bool enable)
858 {
859 struct gb_svc *svc = intf->hd->svc;
860 int ret;
861
862 dev_dbg(&intf->dev, "%s - %d\n", __func__, enable);
863
864 ret = gb_svc_intf_unipro_set(svc, intf->interface_id, enable);
865 if (ret) {
866 dev_err(&intf->dev, "failed to set UniPro: %d\n", ret);
867 return ret;
868 }
869
870 return 0;
871 }
872
873 static int gb_interface_activate_operation(struct gb_interface *intf,
874 enum gb_interface_type *intf_type)
875 {
876 struct gb_svc *svc = intf->hd->svc;
877 u8 type;
878 int ret;
879
880 dev_dbg(&intf->dev, "%s\n", __func__);
881
882 ret = gb_svc_intf_activate(svc, intf->interface_id, &type);
883 if (ret) {
884 dev_err(&intf->dev, "failed to activate: %d\n", ret);
885 return ret;
886 }
887
888 switch (type) {
889 case GB_SVC_INTF_TYPE_DUMMY:
890 *intf_type = GB_INTERFACE_TYPE_DUMMY;
891
892 return -ENODEV;
893 case GB_SVC_INTF_TYPE_UNIPRO:
894 *intf_type = GB_INTERFACE_TYPE_UNIPRO;
895 dev_err(&intf->dev, "interface type UniPro not supported\n");
896
897 return -ENODEV;
898 case GB_SVC_INTF_TYPE_GREYBUS:
899 *intf_type = GB_INTERFACE_TYPE_GREYBUS;
900 break;
901 default:
902 dev_err(&intf->dev, "unknown interface type: %u\n", type);
903 *intf_type = GB_INTERFACE_TYPE_UNKNOWN;
904 return -ENODEV;
905 }
906
907 return 0;
908 }
909
910 static int gb_interface_hibernate_link(struct gb_interface *intf)
911 {
912 struct gb_svc *svc = intf->hd->svc;
913
914 return gb_svc_intf_set_power_mode_hibernate(svc, intf->interface_id);
915 }
916
917 static int _gb_interface_activate(struct gb_interface *intf,
918 enum gb_interface_type *type)
919 {
920 int ret;
921
922 *type = GB_INTERFACE_TYPE_UNKNOWN;
923
924 if (intf->ejected || intf->removed)
925 return -ENODEV;
926
927 ret = gb_interface_vsys_set(intf, true);
928 if (ret)
929 return ret;
930
931 ret = gb_interface_refclk_set(intf, true);
932 if (ret)
933 goto err_vsys_disable;
934
935 ret = gb_interface_unipro_set(intf, true);
936 if (ret)
937 goto err_refclk_disable;
938
939 ret = gb_interface_activate_operation(intf, type);
940 if (ret) {
941 switch (*type) {
942 case GB_INTERFACE_TYPE_UNIPRO:
943 case GB_INTERFACE_TYPE_GREYBUS:
944 goto err_hibernate_link;
945 default:
946 goto err_unipro_disable;
947 }
948 }
949
950 ret = gb_interface_read_dme(intf);
951 if (ret)
952 goto err_hibernate_link;
953
954 ret = gb_interface_route_create(intf);
955 if (ret)
956 goto err_hibernate_link;
957
958 intf->active = true;
959
960 trace_gb_interface_activate(intf);
961
962 return 0;
963
964 err_hibernate_link:
965 gb_interface_hibernate_link(intf);
966 err_unipro_disable:
967 gb_interface_unipro_set(intf, false);
968 err_refclk_disable:
969 gb_interface_refclk_set(intf, false);
970 err_vsys_disable:
971 gb_interface_vsys_set(intf, false);
972
973 return ret;
974 }
975
976
977
978
979
980
981
982
983 static int _gb_interface_activate_es3_hack(struct gb_interface *intf,
984 enum gb_interface_type *type)
985 {
986 int retries = 3;
987 int ret;
988
989 while (retries--) {
990 ret = _gb_interface_activate(intf, type);
991 if (ret == -ENODEV && *type == GB_INTERFACE_TYPE_UNIPRO)
992 continue;
993
994 break;
995 }
996
997 return ret;
998 }
999
1000
1001
1002
1003
1004
1005 int gb_interface_activate(struct gb_interface *intf)
1006 {
1007 enum gb_interface_type type;
1008 int ret;
1009
1010 switch (intf->type) {
1011 case GB_INTERFACE_TYPE_INVALID:
1012 case GB_INTERFACE_TYPE_GREYBUS:
1013 ret = _gb_interface_activate_es3_hack(intf, &type);
1014 break;
1015 default:
1016 ret = _gb_interface_activate(intf, &type);
1017 }
1018
1019
1020 if (intf->type != GB_INTERFACE_TYPE_INVALID) {
1021 if (type != intf->type) {
1022 dev_err(&intf->dev, "failed to detect interface type\n");
1023
1024 if (!ret)
1025 gb_interface_deactivate(intf);
1026
1027 return -EIO;
1028 }
1029 } else {
1030 intf->type = type;
1031 }
1032
1033 return ret;
1034 }
1035
1036
1037
1038
1039
1040
1041 void gb_interface_deactivate(struct gb_interface *intf)
1042 {
1043 if (!intf->active)
1044 return;
1045
1046 trace_gb_interface_deactivate(intf);
1047
1048
1049 if (intf->mode_switch)
1050 complete(&intf->mode_switch_completion);
1051
1052 gb_interface_route_destroy(intf);
1053 gb_interface_hibernate_link(intf);
1054 gb_interface_unipro_set(intf, false);
1055 gb_interface_refclk_set(intf, false);
1056 gb_interface_vsys_set(intf, false);
1057
1058 intf->active = false;
1059 }
1060
1061
1062
1063
1064
1065
1066
1067
1068 int gb_interface_enable(struct gb_interface *intf)
1069 {
1070 struct gb_control *control;
1071 struct gb_bundle *bundle, *tmp;
1072 int ret, size;
1073 void *manifest;
1074
1075 ret = gb_interface_read_and_clear_init_status(intf);
1076 if (ret) {
1077 dev_err(&intf->dev, "failed to clear init status: %d\n", ret);
1078 return ret;
1079 }
1080
1081
1082 control = gb_control_create(intf);
1083 if (IS_ERR(control)) {
1084 dev_err(&intf->dev, "failed to create control device: %ld\n",
1085 PTR_ERR(control));
1086 return PTR_ERR(control);
1087 }
1088 intf->control = control;
1089
1090 ret = gb_control_enable(intf->control);
1091 if (ret)
1092 goto err_put_control;
1093
1094
1095 size = gb_control_get_manifest_size_operation(intf);
1096 if (size <= 0) {
1097 dev_err(&intf->dev, "failed to get manifest size: %d\n", size);
1098
1099 if (size)
1100 ret = size;
1101 else
1102 ret = -EINVAL;
1103
1104 goto err_disable_control;
1105 }
1106
1107 manifest = kmalloc(size, GFP_KERNEL);
1108 if (!manifest) {
1109 ret = -ENOMEM;
1110 goto err_disable_control;
1111 }
1112
1113
1114 ret = gb_control_get_manifest_operation(intf, manifest, size);
1115 if (ret) {
1116 dev_err(&intf->dev, "failed to get manifest: %d\n", ret);
1117 goto err_free_manifest;
1118 }
1119
1120
1121
1122
1123
1124 if (!gb_manifest_parse(intf, manifest, size)) {
1125 dev_err(&intf->dev, "failed to parse manifest\n");
1126 ret = -EINVAL;
1127 goto err_destroy_bundles;
1128 }
1129
1130 ret = gb_control_get_bundle_versions(intf->control);
1131 if (ret)
1132 goto err_destroy_bundles;
1133
1134
1135 ret = gb_control_add(intf->control);
1136 if (ret)
1137 goto err_destroy_bundles;
1138
1139 pm_runtime_use_autosuspend(&intf->dev);
1140 pm_runtime_get_noresume(&intf->dev);
1141 pm_runtime_set_active(&intf->dev);
1142 pm_runtime_enable(&intf->dev);
1143
1144 list_for_each_entry_safe_reverse(bundle, tmp, &intf->bundles, links) {
1145 ret = gb_bundle_add(bundle);
1146 if (ret) {
1147 gb_bundle_destroy(bundle);
1148 continue;
1149 }
1150 }
1151
1152 kfree(manifest);
1153
1154 intf->enabled = true;
1155
1156 pm_runtime_put(&intf->dev);
1157
1158 trace_gb_interface_enable(intf);
1159
1160 return 0;
1161
1162 err_destroy_bundles:
1163 list_for_each_entry_safe(bundle, tmp, &intf->bundles, links)
1164 gb_bundle_destroy(bundle);
1165 err_free_manifest:
1166 kfree(manifest);
1167 err_disable_control:
1168 gb_control_disable(intf->control);
1169 err_put_control:
1170 gb_control_put(intf->control);
1171 intf->control = NULL;
1172
1173 return ret;
1174 }
1175
1176
1177
1178
1179
1180
1181 void gb_interface_disable(struct gb_interface *intf)
1182 {
1183 struct gb_bundle *bundle;
1184 struct gb_bundle *next;
1185
1186 if (!intf->enabled)
1187 return;
1188
1189 trace_gb_interface_disable(intf);
1190
1191 pm_runtime_get_sync(&intf->dev);
1192
1193
1194 if (intf->quirks & GB_INTERFACE_QUIRK_FORCED_DISABLE)
1195 intf->disconnected = true;
1196
1197 list_for_each_entry_safe(bundle, next, &intf->bundles, links)
1198 gb_bundle_destroy(bundle);
1199
1200 if (!intf->mode_switch && !intf->disconnected)
1201 gb_control_interface_deactivate_prepare(intf->control);
1202
1203 gb_control_del(intf->control);
1204 gb_control_disable(intf->control);
1205 gb_control_put(intf->control);
1206 intf->control = NULL;
1207
1208 intf->enabled = false;
1209
1210 pm_runtime_disable(&intf->dev);
1211 pm_runtime_set_suspended(&intf->dev);
1212 pm_runtime_dont_use_autosuspend(&intf->dev);
1213 pm_runtime_put_noidle(&intf->dev);
1214 }
1215
1216
1217 int gb_interface_add(struct gb_interface *intf)
1218 {
1219 int ret;
1220
1221 ret = device_add(&intf->dev);
1222 if (ret) {
1223 dev_err(&intf->dev, "failed to register interface: %d\n", ret);
1224 return ret;
1225 }
1226
1227 trace_gb_interface_add(intf);
1228
1229 dev_info(&intf->dev, "Interface added (%s)\n",
1230 gb_interface_type_string(intf));
1231
1232 switch (intf->type) {
1233 case GB_INTERFACE_TYPE_GREYBUS:
1234 dev_info(&intf->dev, "GMP VID=0x%08x, PID=0x%08x\n",
1235 intf->vendor_id, intf->product_id);
1236
1237 case GB_INTERFACE_TYPE_UNIPRO:
1238 dev_info(&intf->dev, "DDBL1 Manufacturer=0x%08x, Product=0x%08x\n",
1239 intf->ddbl1_manufacturer_id,
1240 intf->ddbl1_product_id);
1241 break;
1242 default:
1243 break;
1244 }
1245
1246 return 0;
1247 }
1248
1249
1250 void gb_interface_del(struct gb_interface *intf)
1251 {
1252 if (device_is_registered(&intf->dev)) {
1253 trace_gb_interface_del(intf);
1254
1255 device_del(&intf->dev);
1256 dev_info(&intf->dev, "Interface removed\n");
1257 }
1258 }
1259
1260 void gb_interface_put(struct gb_interface *intf)
1261 {
1262 put_device(&intf->dev);
1263 }