summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/acpi/Makefile2
-rw-r--r--drivers/acpi/bus.c411
-rw-r--r--drivers/acpi/device_pm.c8
-rw-r--r--drivers/acpi/device_sysfs.c521
-rw-r--r--drivers/acpi/internal.h11
-rw-r--r--drivers/acpi/power.c15
-rw-r--r--drivers/acpi/scan.c860
-rw-r--r--drivers/base/core.c43
-rw-r--r--drivers/base/dd.c20
-rw-r--r--drivers/base/power/power.h2
-rw-r--r--drivers/base/power/qos.c37
-rw-r--r--drivers/base/power/sysfs.c11
-rw-r--r--drivers/dma/Kconfig8
-rw-r--r--drivers/dma/Makefile1
-rw-r--r--drivers/dma/idma64.c710
-rw-r--r--drivers/dma/idma64.h233
-rw-r--r--drivers/mfd/Kconfig23
-rw-r--r--drivers/mfd/Makefile3
-rw-r--r--drivers/mfd/intel-lpss-acpi.c84
-rw-r--r--drivers/mfd/intel-lpss-pci.c113
-rw-r--r--drivers/mfd/intel-lpss.c524
-rw-r--r--drivers/mfd/intel-lpss.h62
-rw-r--r--drivers/mfd/mfd-core.c2
-rw-r--r--include/linux/device.h2
-rw-r--r--include/linux/klist.h1
-rw-r--r--include/linux/pm_qos.h5
-rw-r--r--lib/klist.c41
27 files changed, 2884 insertions, 869 deletions
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 8321430d7f24..08ac1100e2dc 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -24,7 +24,7 @@ acpi-y += nvs.o
24# Power management related files 24# Power management related files
25acpi-y += wakeup.o 25acpi-y += wakeup.o
26acpi-$(CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT) += sleep.o 26acpi-$(CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT) += sleep.o
27acpi-y += device_pm.o 27acpi-y += device_sysfs.o device_pm.o
28acpi-$(CONFIG_ACPI_SLEEP) += proc.o 28acpi-$(CONFIG_ACPI_SLEEP) += proc.o
29 29
30 30
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 513e7230e3d0..a23903c8bea9 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -423,6 +423,413 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
423 acpi_evaluate_ost(handle, type, ost_code, NULL); 423 acpi_evaluate_ost(handle, type, ost_code, NULL);
424} 424}
425 425
426static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
427{
428 struct acpi_device *device = data;
429
430 device->driver->ops.notify(device, event);
431}
432
433static void acpi_device_notify_fixed(void *data)
434{
435 struct acpi_device *device = data;
436
437 /* Fixed hardware devices have no handles */
438 acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
439}
440
441static u32 acpi_device_fixed_event(void *data)
442{
443 acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
444 return ACPI_INTERRUPT_HANDLED;
445}
446
447static int acpi_device_install_notify_handler(struct acpi_device *device)
448{
449 acpi_status status;
450
451 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
452 status =
453 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
454 acpi_device_fixed_event,
455 device);
456 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
457 status =
458 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
459 acpi_device_fixed_event,
460 device);
461 else
462 status = acpi_install_notify_handler(device->handle,
463 ACPI_DEVICE_NOTIFY,
464 acpi_device_notify,
465 device);
466
467 if (ACPI_FAILURE(status))
468 return -EINVAL;
469 return 0;
470}
471
472static void acpi_device_remove_notify_handler(struct acpi_device *device)
473{
474 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
475 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
476 acpi_device_fixed_event);
477 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
478 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
479 acpi_device_fixed_event);
480 else
481 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
482 acpi_device_notify);
483}
484
485/* --------------------------------------------------------------------------
486 Device Matching
487 -------------------------------------------------------------------------- */
488
489/**
490 * acpi_device_is_first_physical_node - Is given dev first physical node
491 * @adev: ACPI companion device
492 * @dev: Physical device to check
493 *
494 * Function checks if given @dev is the first physical devices attached to
495 * the ACPI companion device. This distinction is needed in some cases
496 * where the same companion device is shared between many physical devices.
497 *
498 * Note that the caller have to provide valid @adev pointer.
499 */
500bool acpi_device_is_first_physical_node(struct acpi_device *adev,
501 const struct device *dev)
502{
503 bool ret = false;
504
505 mutex_lock(&adev->physical_node_lock);
506 if (!list_empty(&adev->physical_node_list)) {
507 const struct acpi_device_physical_node *node;
508
509 node = list_first_entry(&adev->physical_node_list,
510 struct acpi_device_physical_node, node);
511 ret = node->dev == dev;
512 }
513 mutex_unlock(&adev->physical_node_lock);
514
515 return ret;
516}
517
518/*
519 * acpi_companion_match() - Can we match via ACPI companion device
520 * @dev: Device in question
521 *
522 * Check if the given device has an ACPI companion and if that companion has
523 * a valid list of PNP IDs, and if the device is the first (primary) physical
524 * device associated with it. Return the companion pointer if that's the case
525 * or NULL otherwise.
526 *
527 * If multiple physical devices are attached to a single ACPI companion, we need
528 * to be careful. The usage scenario for this kind of relationship is that all
529 * of the physical devices in question use resources provided by the ACPI
530 * companion. A typical case is an MFD device where all the sub-devices share
531 * the parent's ACPI companion. In such cases we can only allow the primary
532 * (first) physical device to be matched with the help of the companion's PNP
533 * IDs.
534 *
535 * Additional physical devices sharing the ACPI companion can still use
536 * resources available from it but they will be matched normally using functions
537 * provided by their bus types (and analogously for their modalias).
538 */
539struct acpi_device *acpi_companion_match(const struct device *dev)
540{
541 struct acpi_device *adev;
542 struct mutex *physical_node_lock;
543
544 adev = ACPI_COMPANION(dev);
545 if (!adev)
546 return NULL;
547
548 if (list_empty(&adev->pnp.ids))
549 return NULL;
550
551 physical_node_lock = &adev->physical_node_lock;
552 mutex_lock(physical_node_lock);
553 if (list_empty(&adev->physical_node_list)) {
554 adev = NULL;
555 } else {
556 const struct acpi_device_physical_node *node;
557
558 node = list_first_entry(&adev->physical_node_list,
559 struct acpi_device_physical_node, node);
560 if (node->dev != dev)
561 adev = NULL;
562 }
563 mutex_unlock(physical_node_lock);
564
565 return adev;
566}
567
568/**
569 * acpi_of_match_device - Match device object using the "compatible" property.
570 * @adev: ACPI device object to match.
571 * @of_match_table: List of device IDs to match against.
572 *
573 * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
574 * identifiers and a _DSD object with the "compatible" property, use that
575 * property to match against the given list of identifiers.
576 */
577static bool acpi_of_match_device(struct acpi_device *adev,
578 const struct of_device_id *of_match_table)
579{
580 const union acpi_object *of_compatible, *obj;
581 int i, nval;
582
583 if (!adev)
584 return false;
585
586 of_compatible = adev->data.of_compatible;
587 if (!of_match_table || !of_compatible)
588 return false;
589
590 if (of_compatible->type == ACPI_TYPE_PACKAGE) {
591 nval = of_compatible->package.count;
592 obj = of_compatible->package.elements;
593 } else { /* Must be ACPI_TYPE_STRING. */
594 nval = 1;
595 obj = of_compatible;
596 }
597 /* Now we can look for the driver DT compatible strings */
598 for (i = 0; i < nval; i++, obj++) {
599 const struct of_device_id *id;
600
601 for (id = of_match_table; id->compatible[0]; id++)
602 if (!strcasecmp(obj->string.pointer, id->compatible))
603 return true;
604 }
605
606 return false;
607}
608
609static bool __acpi_match_device_cls(const struct acpi_device_id *id,
610 struct acpi_hardware_id *hwid)
611{
612 int i, msk, byte_shift;
613 char buf[3];
614
615 if (!id->cls)
616 return false;
617
618 /* Apply class-code bitmask, before checking each class-code byte */
619 for (i = 1; i <= 3; i++) {
620 byte_shift = 8 * (3 - i);
621 msk = (id->cls_msk >> byte_shift) & 0xFF;
622 if (!msk)
623 continue;
624
625 sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
626 if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
627 return false;
628 }
629 return true;
630}
631
632static const struct acpi_device_id *__acpi_match_device(
633 struct acpi_device *device,
634 const struct acpi_device_id *ids,
635 const struct of_device_id *of_ids)
636{
637 const struct acpi_device_id *id;
638 struct acpi_hardware_id *hwid;
639
640 /*
641 * If the device is not present, it is unnecessary to load device
642 * driver for it.
643 */
644 if (!device || !device->status.present)
645 return NULL;
646
647 list_for_each_entry(hwid, &device->pnp.ids, list) {
648 /* First, check the ACPI/PNP IDs provided by the caller. */
649 for (id = ids; id->id[0] || id->cls; id++) {
650 if (id->id[0] && !strcmp((char *) id->id, hwid->id))
651 return id;
652 else if (id->cls && __acpi_match_device_cls(id, hwid))
653 return id;
654 }
655
656 /*
657 * Next, check ACPI_DT_NAMESPACE_HID and try to match the
658 * "compatible" property if found.
659 *
660 * The id returned by the below is not valid, but the only
661 * caller passing non-NULL of_ids here is only interested in
662 * whether or not the return value is NULL.
663 */
664 if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
665 && acpi_of_match_device(device, of_ids))
666 return id;
667 }
668 return NULL;
669}
670
671/**
672 * acpi_match_device - Match a struct device against a given list of ACPI IDs
673 * @ids: Array of struct acpi_device_id object to match against.
674 * @dev: The device structure to match.
675 *
676 * Check if @dev has a valid ACPI handle and if there is a struct acpi_device
677 * object for that handle and use that object to match against a given list of
678 * device IDs.
679 *
680 * Return a pointer to the first matching ID on success or %NULL on failure.
681 */
682const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
683 const struct device *dev)
684{
685 return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
686}
687EXPORT_SYMBOL_GPL(acpi_match_device);
688
689int acpi_match_device_ids(struct acpi_device *device,
690 const struct acpi_device_id *ids)
691{
692 return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
693}
694EXPORT_SYMBOL(acpi_match_device_ids);
695
696bool acpi_driver_match_device(struct device *dev,
697 const struct device_driver *drv)
698{
699 if (!drv->acpi_match_table)
700 return acpi_of_match_device(ACPI_COMPANION(dev),
701 drv->of_match_table);
702
703 return !!__acpi_match_device(acpi_companion_match(dev),
704 drv->acpi_match_table, drv->of_match_table);
705}
706EXPORT_SYMBOL_GPL(acpi_driver_match_device);
707
708/* --------------------------------------------------------------------------
709 ACPI Driver Management
710 -------------------------------------------------------------------------- */
711
712/**
713 * acpi_bus_register_driver - register a driver with the ACPI bus
714 * @driver: driver being registered
715 *
716 * Registers a driver with the ACPI bus. Searches the namespace for all
717 * devices that match the driver's criteria and binds. Returns zero for
718 * success or a negative error status for failure.
719 */
720int acpi_bus_register_driver(struct acpi_driver *driver)
721{
722 int ret;
723
724 if (acpi_disabled)
725 return -ENODEV;
726 driver->drv.name = driver->name;
727 driver->drv.bus = &acpi_bus_type;
728 driver->drv.owner = driver->owner;
729
730 ret = driver_register(&driver->drv);
731 return ret;
732}
733
734EXPORT_SYMBOL(acpi_bus_register_driver);
735
736/**
737 * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
738 * @driver: driver to unregister
739 *
740 * Unregisters a driver with the ACPI bus. Searches the namespace for all
741 * devices that match the driver's criteria and unbinds.
742 */
743void acpi_bus_unregister_driver(struct acpi_driver *driver)
744{
745 driver_unregister(&driver->drv);
746}
747
748EXPORT_SYMBOL(acpi_bus_unregister_driver);
749
750/* --------------------------------------------------------------------------
751 ACPI Bus operations
752 -------------------------------------------------------------------------- */
753
754static int acpi_bus_match(struct device *dev, struct device_driver *drv)
755{
756 struct acpi_device *acpi_dev = to_acpi_device(dev);
757 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
758
759 return acpi_dev->flags.match_driver
760 && !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
761}
762
763static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
764{
765 return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
766}
767
768static int acpi_device_probe(struct device *dev)
769{
770 struct acpi_device *acpi_dev = to_acpi_device(dev);
771 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
772 int ret;
773
774 if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
775 return -EINVAL;
776
777 if (!acpi_drv->ops.add)
778 return -ENOSYS;
779
780 ret = acpi_drv->ops.add(acpi_dev);
781 if (ret)
782 return ret;
783
784 acpi_dev->driver = acpi_drv;
785 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
786 "Driver [%s] successfully bound to device [%s]\n",
787 acpi_drv->name, acpi_dev->pnp.bus_id));
788
789 if (acpi_drv->ops.notify) {
790 ret = acpi_device_install_notify_handler(acpi_dev);
791 if (ret) {
792 if (acpi_drv->ops.remove)
793 acpi_drv->ops.remove(acpi_dev);
794
795 acpi_dev->driver = NULL;
796 acpi_dev->driver_data = NULL;
797 return ret;
798 }
799 }
800
801 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
802 acpi_drv->name, acpi_dev->pnp.bus_id));
803 get_device(dev);
804 return 0;
805}
806
807static int acpi_device_remove(struct device * dev)
808{
809 struct acpi_device *acpi_dev = to_acpi_device(dev);
810 struct acpi_driver *acpi_drv = acpi_dev->driver;
811
812 if (acpi_drv) {
813 if (acpi_drv->ops.notify)
814 acpi_device_remove_notify_handler(acpi_dev);
815 if (acpi_drv->ops.remove)
816 acpi_drv->ops.remove(acpi_dev);
817 }
818 acpi_dev->driver = NULL;
819 acpi_dev->driver_data = NULL;
820
821 put_device(dev);
822 return 0;
823}
824
825struct bus_type acpi_bus_type = {
826 .name = "acpi",
827 .match = acpi_bus_match,
828 .probe = acpi_device_probe,
829 .remove = acpi_device_remove,
830 .uevent = acpi_device_uevent,
831};
832
426/* -------------------------------------------------------------------------- 833/* --------------------------------------------------------------------------
427 Initialization/Cleanup 834 Initialization/Cleanup
428 -------------------------------------------------------------------------- */ 835 -------------------------------------------------------------------------- */
@@ -661,7 +1068,9 @@ static int __init acpi_bus_init(void)
661 */ 1068 */
662 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); 1069 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
663 1070
664 return 0; 1071 result = bus_register(&acpi_bus_type);
1072 if (!result)
1073 return 0;
665 1074
666 /* Mimic structured exception handling */ 1075 /* Mimic structured exception handling */
667 error1: 1076 error1:
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 88dbbb115285..337e8118836d 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1123,6 +1123,14 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on)
1123 if (dev->pm_domain) 1123 if (dev->pm_domain)
1124 return -EEXIST; 1124 return -EEXIST;
1125 1125
1126 /*
1127 * Only attach the power domain to the first device if the
1128 * companion is shared by multiple. This is to prevent doing power
1129 * management twice.
1130 */
1131 if (!acpi_device_is_first_physical_node(adev, dev))
1132 return -EBUSY;
1133
1126 acpi_add_pm_notifier(adev, dev, acpi_pm_notify_work_func); 1134 acpi_add_pm_notifier(adev, dev, acpi_pm_notify_work_func);
1127 dev->pm_domain = &acpi_general_pm_domain; 1135 dev->pm_domain = &acpi_general_pm_domain;
1128 if (power_on) { 1136 if (power_on) {
diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
new file mode 100644
index 000000000000..4ab4582e586b
--- /dev/null
+++ b/drivers/acpi/device_sysfs.c
@@ -0,0 +1,521 @@
1/*
2 * drivers/acpi/device_sysfs.c - ACPI device sysfs attributes and modalias.
3 *
4 * Copyright (C) 2015, Intel Corp.
5 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
6 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 */
21
22#include <linux/acpi.h>
23#include <linux/device.h>
24#include <linux/export.h>
25#include <linux/nls.h>
26
27#include "internal.h"
28
29/**
30 * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
31 * @acpi_dev: ACPI device object.
32 * @modalias: Buffer to print into.
33 * @size: Size of the buffer.
34 *
35 * Creates hid/cid(s) string needed for modalias and uevent
36 * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
37 * char *modalias: "acpi:IBM0001:ACPI0001"
38 * Return: 0: no _HID and no _CID
39 * -EINVAL: output error
40 * -ENOMEM: output is truncated
41*/
42static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
43 int size)
44{
45 int len;
46 int count;
47 struct acpi_hardware_id *id;
48
49 /*
50 * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
51 * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
52 * device's list.
53 */
54 count = 0;
55 list_for_each_entry(id, &acpi_dev->pnp.ids, list)
56 if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
57 count++;
58
59 if (!count)
60 return 0;
61
62 len = snprintf(modalias, size, "acpi:");
63 if (len <= 0)
64 return len;
65
66 size -= len;
67
68 list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
69 if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
70 continue;
71
72 count = snprintf(&modalias[len], size, "%s:", id->id);
73 if (count < 0)
74 return -EINVAL;
75
76 if (count >= size)
77 return -ENOMEM;
78
79 len += count;
80 size -= count;
81 }
82 modalias[len] = '\0';
83 return len;
84}
85
86/**
87 * create_of_modalias - Creates DT compatible string for modalias and uevent
88 * @acpi_dev: ACPI device object.
89 * @modalias: Buffer to print into.
90 * @size: Size of the buffer.
91 *
92 * Expose DT compatible modalias as of:NnameTCcompatible. This function should
93 * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
94 * ACPI/PNP IDs.
95 */
96static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
97 int size)
98{
99 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
100 const union acpi_object *of_compatible, *obj;
101 int len, count;
102 int i, nval;
103 char *c;
104
105 acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
106 /* DT strings are all in lower case */
107 for (c = buf.pointer; *c != '\0'; c++)
108 *c = tolower(*c);
109
110 len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
111 ACPI_FREE(buf.pointer);
112
113 if (len <= 0)
114 return len;
115
116 of_compatible = acpi_dev->data.of_compatible;
117 if (of_compatible->type == ACPI_TYPE_PACKAGE) {
118 nval = of_compatible->package.count;
119 obj = of_compatible->package.elements;
120 } else { /* Must be ACPI_TYPE_STRING. */
121 nval = 1;
122 obj = of_compatible;
123 }
124 for (i = 0; i < nval; i++, obj++) {
125 count = snprintf(&modalias[len], size, "C%s",
126 obj->string.pointer);
127 if (count < 0)
128 return -EINVAL;
129
130 if (count >= size)
131 return -ENOMEM;
132
133 len += count;
134 size -= count;
135 }
136 modalias[len] = '\0';
137 return len;
138}
139
140int __acpi_device_uevent_modalias(struct acpi_device *adev,
141 struct kobj_uevent_env *env)
142{
143 int len;
144
145 if (!adev)
146 return -ENODEV;
147
148 if (list_empty(&adev->pnp.ids))
149 return 0;
150
151 if (add_uevent_var(env, "MODALIAS="))
152 return -ENOMEM;
153
154 len = create_pnp_modalias(adev, &env->buf[env->buflen - 1],
155 sizeof(env->buf) - env->buflen);
156 if (len < 0)
157 return len;
158
159 env->buflen += len;
160 if (!adev->data.of_compatible)
161 return 0;
162
163 if (len > 0 && add_uevent_var(env, "MODALIAS="))
164 return -ENOMEM;
165
166 len = create_of_modalias(adev, &env->buf[env->buflen - 1],
167 sizeof(env->buf) - env->buflen);
168 if (len < 0)
169 return len;
170
171 env->buflen += len;
172
173 return 0;
174}
175
176/**
177 * acpi_device_uevent_modalias - uevent modalias for ACPI-enumerated devices.
178 *
179 * Create the uevent modalias field for ACPI-enumerated devices.
180 *
181 * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
182 * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
183 */
184int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
185{
186 return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
187}
188EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
189
190static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
191{
192 int len, count;
193
194 if (!adev)
195 return -ENODEV;
196
197 if (list_empty(&adev->pnp.ids))
198 return 0;
199
200 len = create_pnp_modalias(adev, buf, size - 1);
201 if (len < 0) {
202 return len;
203 } else if (len > 0) {
204 buf[len++] = '\n';
205 size -= len;
206 }
207 if (!adev->data.of_compatible)
208 return len;
209
210 count = create_of_modalias(adev, buf + len, size - 1);
211 if (count < 0) {
212 return count;
213 } else if (count > 0) {
214 len += count;
215 buf[len++] = '\n';
216 }
217
218 return len;
219}
220
221/**
222 * acpi_device_modalias - modalias sysfs attribute for ACPI-enumerated devices.
223 *
224 * Create the modalias sysfs attribute for ACPI-enumerated devices.
225 *
226 * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
227 * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
228 */
229int acpi_device_modalias(struct device *dev, char *buf, int size)
230{
231 return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
232}
233EXPORT_SYMBOL_GPL(acpi_device_modalias);
234
235static ssize_t
236acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
237 return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
238}
239static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
240
241static ssize_t real_power_state_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
243{
244 struct acpi_device *adev = to_acpi_device(dev);
245 int state;
246 int ret;
247
248 ret = acpi_device_get_power(adev, &state);
249 if (ret)
250 return ret;
251
252 return sprintf(buf, "%s\n", acpi_power_state_string(state));
253}
254
255static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL);
256
257static ssize_t power_state_show(struct device *dev,
258 struct device_attribute *attr, char *buf)
259{
260 struct acpi_device *adev = to_acpi_device(dev);
261
262 return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state));
263}
264
265static DEVICE_ATTR(power_state, 0444, power_state_show, NULL);
266
267static ssize_t
268acpi_eject_store(struct device *d, struct device_attribute *attr,
269 const char *buf, size_t count)
270{
271 struct acpi_device *acpi_device = to_acpi_device(d);
272 acpi_object_type not_used;
273 acpi_status status;
274
275 if (!count || buf[0] != '1')
276 return -EINVAL;
277
278 if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled)
279 && !acpi_device->driver)
280 return -ENODEV;
281
282 status = acpi_get_type(acpi_device->handle, &not_used);
283 if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
284 return -ENODEV;
285
286 get_device(&acpi_device->dev);
287 status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
288 if (ACPI_SUCCESS(status))
289 return count;
290
291 put_device(&acpi_device->dev);
292 acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
293 ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
294 return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
295}
296
297static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
298
299static ssize_t
300acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
301 struct acpi_device *acpi_dev = to_acpi_device(dev);
302
303 return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev));
304}
305static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
306
307static ssize_t acpi_device_uid_show(struct device *dev,
308 struct device_attribute *attr, char *buf)
309{
310 struct acpi_device *acpi_dev = to_acpi_device(dev);
311
312 return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id);
313}
314static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL);
315
316static ssize_t acpi_device_adr_show(struct device *dev,
317 struct device_attribute *attr, char *buf)
318{
319 struct acpi_device *acpi_dev = to_acpi_device(dev);
320
321 return sprintf(buf, "0x%08x\n",
322 (unsigned int)(acpi_dev->pnp.bus_address));
323}
324static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL);
325
326static ssize_t
327acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
328 struct acpi_device *acpi_dev = to_acpi_device(dev);
329 struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
330 int result;
331
332 result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
333 if (result)
334 goto end;
335
336 result = sprintf(buf, "%s\n", (char*)path.pointer);
337 kfree(path.pointer);
338end:
339 return result;
340}
341static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
342
343/* sysfs file that shows description text from the ACPI _STR method */
344static ssize_t description_show(struct device *dev,
345 struct device_attribute *attr,
346 char *buf) {
347 struct acpi_device *acpi_dev = to_acpi_device(dev);
348 int result;
349
350 if (acpi_dev->pnp.str_obj == NULL)
351 return 0;
352
353 /*
354 * The _STR object contains a Unicode identifier for a device.
355 * We need to convert to utf-8 so it can be displayed.
356 */
357 result = utf16s_to_utf8s(
358 (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer,
359 acpi_dev->pnp.str_obj->buffer.length,
360 UTF16_LITTLE_ENDIAN, buf,
361 PAGE_SIZE);
362
363 buf[result++] = '\n';
364
365 return result;
366}
367static DEVICE_ATTR(description, 0444, description_show, NULL);
368
369static ssize_t
370acpi_device_sun_show(struct device *dev, struct device_attribute *attr,
371 char *buf) {
372 struct acpi_device *acpi_dev = to_acpi_device(dev);
373 acpi_status status;
374 unsigned long long sun;
375
376 status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun);
377 if (ACPI_FAILURE(status))
378 return -ENODEV;
379
380 return sprintf(buf, "%llu\n", sun);
381}
382static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
383
384static ssize_t status_show(struct device *dev, struct device_attribute *attr,
385 char *buf) {
386 struct acpi_device *acpi_dev = to_acpi_device(dev);
387 acpi_status status;
388 unsigned long long sta;
389
390 status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta);
391 if (ACPI_FAILURE(status))
392 return -ENODEV;
393
394 return sprintf(buf, "%llu\n", sta);
395}
396static DEVICE_ATTR_RO(status);
397
398/**
399 * acpi_device_setup_files - Create sysfs attributes of an ACPI device.
400 * @dev: ACPI device object.
401 */
402int acpi_device_setup_files(struct acpi_device *dev)
403{
404 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
405 acpi_status status;
406 int result = 0;
407
408 /*
409 * Devices gotten from FADT don't have a "path" attribute
410 */
411 if (dev->handle) {
412 result = device_create_file(&dev->dev, &dev_attr_path);
413 if (result)
414 goto end;
415 }
416
417 if (!list_empty(&dev->pnp.ids)) {
418 result = device_create_file(&dev->dev, &dev_attr_hid);
419 if (result)
420 goto end;
421
422 result = device_create_file(&dev->dev, &dev_attr_modalias);
423 if (result)
424 goto end;
425 }
426
427 /*
428 * If device has _STR, 'description' file is created
429 */
430 if (acpi_has_method(dev->handle, "_STR")) {
431 status = acpi_evaluate_object(dev->handle, "_STR",
432 NULL, &buffer);
433 if (ACPI_FAILURE(status))
434 buffer.pointer = NULL;
435 dev->pnp.str_obj = buffer.pointer;
436 result = device_create_file(&dev->dev, &dev_attr_description);
437 if (result)
438 goto end;
439 }
440
441 if (dev->pnp.type.bus_address)
442 result = device_create_file(&dev->dev, &dev_attr_adr);
443 if (dev->pnp.unique_id)
444 result = device_create_file(&dev->dev, &dev_attr_uid);
445
446 if (acpi_has_method(dev->handle, "_SUN")) {
447 result = device_create_file(&dev->dev, &dev_attr_sun);
448 if (result)
449 goto end;
450 }
451
452 if (acpi_has_method(dev->handle, "_STA")) {
453 result = device_create_file(&dev->dev, &dev_attr_status);
454 if (result)
455 goto end;
456 }
457
458 /*
459 * If device has _EJ0, 'eject' file is created that is used to trigger
460 * hot-removal function from userland.
461 */
462 if (acpi_has_method(dev->handle, "_EJ0")) {
463 result = device_create_file(&dev->dev, &dev_attr_eject);
464 if (result)
465 return result;
466 }
467
468 if (dev->flags.power_manageable) {
469 result = device_create_file(&dev->dev, &dev_attr_power_state);
470 if (result)
471 return result;
472
473 if (dev->power.flags.power_resources)
474 result = device_create_file(&dev->dev,
475 &dev_attr_real_power_state);
476 }
477
478end:
479 return result;
480}
481
482/**
483 * acpi_device_remove_files - Remove sysfs attributes of an ACPI device.
484 * @dev: ACPI device object.
485 */
486void acpi_device_remove_files(struct acpi_device *dev)
487{
488 if (dev->flags.power_manageable) {
489 device_remove_file(&dev->dev, &dev_attr_power_state);
490 if (dev->power.flags.power_resources)
491 device_remove_file(&dev->dev,
492 &dev_attr_real_power_state);
493 }
494
495 /*
496 * If device has _STR, remove 'description' file
497 */
498 if (acpi_has_method(dev->handle, "_STR")) {
499 kfree(dev->pnp.str_obj);
500 device_remove_file(&dev->dev, &dev_attr_description);
501 }
502 /*
503 * If device has _EJ0, remove 'eject' file.
504 */
505 if (acpi_has_method(dev->handle, "_EJ0"))
506 device_remove_file(&dev->dev, &dev_attr_eject);
507
508 if (acpi_has_method(dev->handle, "_SUN"))
509 device_remove_file(&dev->dev, &dev_attr_sun);
510
511 if (dev->pnp.unique_id)
512 device_remove_file(&dev->dev, &dev_attr_uid);
513 if (dev->pnp.type.bus_address)
514 device_remove_file(&dev->dev, &dev_attr_adr);
515 device_remove_file(&dev->dev, &dev_attr_modalias);
516 device_remove_file(&dev->dev, &dev_attr_hid);
517 if (acpi_has_method(dev->handle, "_STA"))
518 device_remove_file(&dev->dev, &dev_attr_status);
519 if (dev->handle)
520 device_remove_file(&dev->dev, &dev_attr_path);
521}
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 4683a96932b9..df7f7aff327b 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -93,10 +93,21 @@ int acpi_device_add(struct acpi_device *device,
93 void (*release)(struct device *)); 93 void (*release)(struct device *));
94void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, 94void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
95 int type, unsigned long long sta); 95 int type, unsigned long long sta);
96int acpi_device_setup_files(struct acpi_device *dev);
97void acpi_device_remove_files(struct acpi_device *dev);
96void acpi_device_add_finalize(struct acpi_device *device); 98void acpi_device_add_finalize(struct acpi_device *device);
97void acpi_free_pnp_ids(struct acpi_device_pnp *pnp); 99void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
98bool acpi_device_is_present(struct acpi_device *adev); 100bool acpi_device_is_present(struct acpi_device *adev);
99bool acpi_device_is_battery(struct acpi_device *adev); 101bool acpi_device_is_battery(struct acpi_device *adev);
102bool acpi_device_is_first_physical_node(struct acpi_device *adev,
103 const struct device *dev);
104
105/* --------------------------------------------------------------------------
106 Device Matching and Notification
107 -------------------------------------------------------------------------- */
108struct acpi_device *acpi_companion_match(const struct device *dev);
109int __acpi_device_uevent_modalias(struct acpi_device *adev,
110 struct kobj_uevent_env *env);
100 111
101/* -------------------------------------------------------------------------- 112/* --------------------------------------------------------------------------
102 Power Resource 113 Power Resource
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 93eac53b5110..ce68ae68840d 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -1,8 +1,10 @@
1/* 1/*
2 * acpi_power.c - ACPI Bus Power Management ($Revision: 39 $) 2 * drivers/acpi/power.c - ACPI Power Resources management.
3 * 3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 4 * Copyright (C) 2001 - 2015 Intel Corp.
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Author: Andy Grover <andrew.grover@intel.com>
6 * Author: Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
6 * 8 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 * 10 *
@@ -27,10 +29,11 @@
27 * ACPI power-managed devices may be controlled in two ways: 29 * ACPI power-managed devices may be controlled in two ways:
28 * 1. via "Device Specific (D-State) Control" 30 * 1. via "Device Specific (D-State) Control"
29 * 2. via "Power Resource Control". 31 * 2. via "Power Resource Control".
30 * This module is used to manage devices relying on Power Resource Control. 32 * The code below deals with ACPI Power Resources control.
31 * 33 *
32 * An ACPI "power resource object" describes a software controllable power 34 * An ACPI "power resource object" represents a software controllable power
33 * plane, clock plane, or other resource used by a power managed device. 35 * plane, clock plane, or other resource depended on by a device.
36 *
34 * A device may rely on multiple power resources, and a power resource 37 * A device may rely on multiple power resources, and a power resource
35 * may be shared by multiple devices. 38 * may be shared by multiple devices.
36 */ 39 */
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index ec256352f423..01136b879038 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -115,264 +115,6 @@ int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
115 return 0; 115 return 0;
116} 116}
117 117
118/**
119 * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
120 * @acpi_dev: ACPI device object.
121 * @modalias: Buffer to print into.
122 * @size: Size of the buffer.
123 *
124 * Creates hid/cid(s) string needed for modalias and uevent
125 * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
126 * char *modalias: "acpi:IBM0001:ACPI0001"
127 * Return: 0: no _HID and no _CID
128 * -EINVAL: output error
129 * -ENOMEM: output is truncated
130*/
131static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
132 int size)
133{
134 int len;
135 int count;
136 struct acpi_hardware_id *id;
137
138 /*
139 * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
140 * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
141 * device's list.
142 */
143 count = 0;
144 list_for_each_entry(id, &acpi_dev->pnp.ids, list)
145 if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
146 count++;
147
148 if (!count)
149 return 0;
150
151 len = snprintf(modalias, size, "acpi:");
152 if (len <= 0)
153 return len;
154
155 size -= len;
156
157 list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
158 if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
159 continue;
160
161 count = snprintf(&modalias[len], size, "%s:", id->id);
162 if (count < 0)
163 return -EINVAL;
164
165 if (count >= size)
166 return -ENOMEM;
167
168 len += count;
169 size -= count;
170 }
171 modalias[len] = '\0';
172 return len;
173}
174
175/**
176 * create_of_modalias - Creates DT compatible string for modalias and uevent
177 * @acpi_dev: ACPI device object.
178 * @modalias: Buffer to print into.
179 * @size: Size of the buffer.
180 *
181 * Expose DT compatible modalias as of:NnameTCcompatible. This function should
182 * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
183 * ACPI/PNP IDs.
184 */
185static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
186 int size)
187{
188 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
189 const union acpi_object *of_compatible, *obj;
190 int len, count;
191 int i, nval;
192 char *c;
193
194 acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
195 /* DT strings are all in lower case */
196 for (c = buf.pointer; *c != '\0'; c++)
197 *c = tolower(*c);
198
199 len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
200 ACPI_FREE(buf.pointer);
201
202 if (len <= 0)
203 return len;
204
205 of_compatible = acpi_dev->data.of_compatible;
206 if (of_compatible->type == ACPI_TYPE_PACKAGE) {
207 nval = of_compatible->package.count;
208 obj = of_compatible->package.elements;
209 } else { /* Must be ACPI_TYPE_STRING. */
210 nval = 1;
211 obj = of_compatible;
212 }
213 for (i = 0; i < nval; i++, obj++) {
214 count = snprintf(&modalias[len], size, "C%s",
215 obj->string.pointer);
216 if (count < 0)
217 return -EINVAL;
218
219 if (count >= size)
220 return -ENOMEM;
221
222 len += count;
223 size -= count;
224 }
225 modalias[len] = '\0';
226 return len;
227}
228
229/*
230 * acpi_companion_match() - Can we match via ACPI companion device
231 * @dev: Device in question
232 *
233 * Check if the given device has an ACPI companion and if that companion has
234 * a valid list of PNP IDs, and if the device is the first (primary) physical
235 * device associated with it. Return the companion pointer if that's the case
236 * or NULL otherwise.
237 *
238 * If multiple physical devices are attached to a single ACPI companion, we need
239 * to be careful. The usage scenario for this kind of relationship is that all
240 * of the physical devices in question use resources provided by the ACPI
241 * companion. A typical case is an MFD device where all the sub-devices share
242 * the parent's ACPI companion. In such cases we can only allow the primary
243 * (first) physical device to be matched with the help of the companion's PNP
244 * IDs.
245 *
246 * Additional physical devices sharing the ACPI companion can still use
247 * resources available from it but they will be matched normally using functions
248 * provided by their bus types (and analogously for their modalias).
249 */
250static struct acpi_device *acpi_companion_match(const struct device *dev)
251{
252 struct acpi_device *adev;
253 struct mutex *physical_node_lock;
254
255 adev = ACPI_COMPANION(dev);
256 if (!adev)
257 return NULL;
258
259 if (list_empty(&adev->pnp.ids))
260 return NULL;
261
262 physical_node_lock = &adev->physical_node_lock;
263 mutex_lock(physical_node_lock);
264 if (list_empty(&adev->physical_node_list)) {
265 adev = NULL;
266 } else {
267 const struct acpi_device_physical_node *node;
268
269 node = list_first_entry(&adev->physical_node_list,
270 struct acpi_device_physical_node, node);
271 if (node->dev != dev)
272 adev = NULL;
273 }
274 mutex_unlock(physical_node_lock);
275
276 return adev;
277}
278
279static int __acpi_device_uevent_modalias(struct acpi_device *adev,
280 struct kobj_uevent_env *env)
281{
282 int len;
283
284 if (!adev)
285 return -ENODEV;
286
287 if (list_empty(&adev->pnp.ids))
288 return 0;
289
290 if (add_uevent_var(env, "MODALIAS="))
291 return -ENOMEM;
292
293 len = create_pnp_modalias(adev, &env->buf[env->buflen - 1],
294 sizeof(env->buf) - env->buflen);
295 if (len < 0)
296 return len;
297
298 env->buflen += len;
299 if (!adev->data.of_compatible)
300 return 0;
301
302 if (len > 0 && add_uevent_var(env, "MODALIAS="))
303 return -ENOMEM;
304
305 len = create_of_modalias(adev, &env->buf[env->buflen - 1],
306 sizeof(env->buf) - env->buflen);
307 if (len < 0)
308 return len;
309
310 env->buflen += len;
311
312 return 0;
313}
314
315/*
316 * Creates uevent modalias field for ACPI enumerated devices.
317 * Because the other buses does not support ACPI HIDs & CIDs.
318 * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
319 * "acpi:IBM0001:ACPI0001"
320 */
321int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
322{
323 return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
324}
325EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
326
327static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
328{
329 int len, count;
330
331 if (!adev)
332 return -ENODEV;
333
334 if (list_empty(&adev->pnp.ids))
335 return 0;
336
337 len = create_pnp_modalias(adev, buf, size - 1);
338 if (len < 0) {
339 return len;
340 } else if (len > 0) {
341 buf[len++] = '\n';
342 size -= len;
343 }
344 if (!adev->data.of_compatible)
345 return len;
346
347 count = create_of_modalias(adev, buf + len, size - 1);
348 if (count < 0) {
349 return count;
350 } else if (count > 0) {
351 len += count;
352 buf[len++] = '\n';
353 }
354
355 return len;
356}
357
358/*
359 * Creates modalias sysfs attribute for ACPI enumerated devices.
360 * Because the other buses does not support ACPI HIDs & CIDs.
361 * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
362 * "acpi:IBM0001:ACPI0001"
363 */
364int acpi_device_modalias(struct device *dev, char *buf, int size)
365{
366 return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
367}
368EXPORT_SYMBOL_GPL(acpi_device_modalias);
369
370static ssize_t
371acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
372 return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
373}
374static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
375
376bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) 118bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent)
377{ 119{
378 struct acpi_device_physical_node *pn; 120 struct acpi_device_physical_node *pn;
@@ -701,423 +443,6 @@ void acpi_device_hotplug(struct acpi_device *adev, u32 src)
701 unlock_device_hotplug(); 443 unlock_device_hotplug();
702} 444}
703 445
704static ssize_t real_power_state_show(struct device *dev,
705 struct device_attribute *attr, char *buf)
706{
707 struct acpi_device *adev = to_acpi_device(dev);
708 int state;
709 int ret;
710
711 ret = acpi_device_get_power(adev, &state);
712 if (ret)
713 return ret;
714
715 return sprintf(buf, "%s\n", acpi_power_state_string(state));
716}
717
718static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL);
719
720static ssize_t power_state_show(struct device *dev,
721 struct device_attribute *attr, char *buf)
722{
723 struct acpi_device *adev = to_acpi_device(dev);
724
725 return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state));
726}
727
728static DEVICE_ATTR(power_state, 0444, power_state_show, NULL);
729
730static ssize_t
731acpi_eject_store(struct device *d, struct device_attribute *attr,
732 const char *buf, size_t count)
733{
734 struct acpi_device *acpi_device = to_acpi_device(d);
735 acpi_object_type not_used;
736 acpi_status status;
737
738 if (!count || buf[0] != '1')
739 return -EINVAL;
740
741 if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled)
742 && !acpi_device->driver)
743 return -ENODEV;
744
745 status = acpi_get_type(acpi_device->handle, &not_used);
746 if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
747 return -ENODEV;
748
749 get_device(&acpi_device->dev);
750 status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
751 if (ACPI_SUCCESS(status))
752 return count;
753
754 put_device(&acpi_device->dev);
755 acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
756 ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
757 return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
758}
759
760static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
761
762static ssize_t
763acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
764 struct acpi_device *acpi_dev = to_acpi_device(dev);
765
766 return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev));
767}
768static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
769
770static ssize_t acpi_device_uid_show(struct device *dev,
771 struct device_attribute *attr, char *buf)
772{
773 struct acpi_device *acpi_dev = to_acpi_device(dev);
774
775 return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id);
776}
777static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL);
778
779static ssize_t acpi_device_adr_show(struct device *dev,
780 struct device_attribute *attr, char *buf)
781{
782 struct acpi_device *acpi_dev = to_acpi_device(dev);
783
784 return sprintf(buf, "0x%08x\n",
785 (unsigned int)(acpi_dev->pnp.bus_address));
786}
787static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL);
788
789static ssize_t
790acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
791 struct acpi_device *acpi_dev = to_acpi_device(dev);
792 struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
793 int result;
794
795 result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
796 if (result)
797 goto end;
798
799 result = sprintf(buf, "%s\n", (char*)path.pointer);
800 kfree(path.pointer);
801end:
802 return result;
803}
804static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
805
806/* sysfs file that shows description text from the ACPI _STR method */
807static ssize_t description_show(struct device *dev,
808 struct device_attribute *attr,
809 char *buf) {
810 struct acpi_device *acpi_dev = to_acpi_device(dev);
811 int result;
812
813 if (acpi_dev->pnp.str_obj == NULL)
814 return 0;
815
816 /*
817 * The _STR object contains a Unicode identifier for a device.
818 * We need to convert to utf-8 so it can be displayed.
819 */
820 result = utf16s_to_utf8s(
821 (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer,
822 acpi_dev->pnp.str_obj->buffer.length,
823 UTF16_LITTLE_ENDIAN, buf,
824 PAGE_SIZE);
825
826 buf[result++] = '\n';
827
828 return result;
829}
830static DEVICE_ATTR(description, 0444, description_show, NULL);
831
832static ssize_t
833acpi_device_sun_show(struct device *dev, struct device_attribute *attr,
834 char *buf) {
835 struct acpi_device *acpi_dev = to_acpi_device(dev);
836 acpi_status status;
837 unsigned long long sun;
838
839 status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun);
840 if (ACPI_FAILURE(status))
841 return -ENODEV;
842
843 return sprintf(buf, "%llu\n", sun);
844}
845static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
846
847static ssize_t status_show(struct device *dev, struct device_attribute *attr,
848 char *buf) {
849 struct acpi_device *acpi_dev = to_acpi_device(dev);
850 acpi_status status;
851 unsigned long long sta;
852
853 status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta);
854 if (ACPI_FAILURE(status))
855 return -ENODEV;
856
857 return sprintf(buf, "%llu\n", sta);
858}
859static DEVICE_ATTR_RO(status);
860
861static int acpi_device_setup_files(struct acpi_device *dev)
862{
863 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
864 acpi_status status;
865 int result = 0;
866
867 /*
868 * Devices gotten from FADT don't have a "path" attribute
869 */
870 if (dev->handle) {
871 result = device_create_file(&dev->dev, &dev_attr_path);
872 if (result)
873 goto end;
874 }
875
876 if (!list_empty(&dev->pnp.ids)) {
877 result = device_create_file(&dev->dev, &dev_attr_hid);
878 if (result)
879 goto end;
880
881 result = device_create_file(&dev->dev, &dev_attr_modalias);
882 if (result)
883 goto end;
884 }
885
886 /*
887 * If device has _STR, 'description' file is created
888 */
889 if (acpi_has_method(dev->handle, "_STR")) {
890 status = acpi_evaluate_object(dev->handle, "_STR",
891 NULL, &buffer);
892 if (ACPI_FAILURE(status))
893 buffer.pointer = NULL;
894 dev->pnp.str_obj = buffer.pointer;
895 result = device_create_file(&dev->dev, &dev_attr_description);
896 if (result)
897 goto end;
898 }
899
900 if (dev->pnp.type.bus_address)
901 result = device_create_file(&dev->dev, &dev_attr_adr);
902 if (dev->pnp.unique_id)
903 result = device_create_file(&dev->dev, &dev_attr_uid);
904
905 if (acpi_has_method(dev->handle, "_SUN")) {
906 result = device_create_file(&dev->dev, &dev_attr_sun);
907 if (result)
908 goto end;
909 }
910
911 if (acpi_has_method(dev->handle, "_STA")) {
912 result = device_create_file(&dev->dev, &dev_attr_status);
913 if (result)
914 goto end;
915 }
916
917 /*
918 * If device has _EJ0, 'eject' file is created that is used to trigger
919 * hot-removal function from userland.
920 */
921 if (acpi_has_method(dev->handle, "_EJ0")) {
922 result = device_create_file(&dev->dev, &dev_attr_eject);
923 if (result)
924 return result;
925 }
926
927 if (dev->flags.power_manageable) {
928 result = device_create_file(&dev->dev, &dev_attr_power_state);
929 if (result)
930 return result;
931
932 if (dev->power.flags.power_resources)
933 result = device_create_file(&dev->dev,
934 &dev_attr_real_power_state);
935 }
936
937end:
938 return result;
939}
940
941static void acpi_device_remove_files(struct acpi_device *dev)
942{
943 if (dev->flags.power_manageable) {
944 device_remove_file(&dev->dev, &dev_attr_power_state);
945 if (dev->power.flags.power_resources)
946 device_remove_file(&dev->dev,
947 &dev_attr_real_power_state);
948 }
949
950 /*
951 * If device has _STR, remove 'description' file
952 */
953 if (acpi_has_method(dev->handle, "_STR")) {
954 kfree(dev->pnp.str_obj);
955 device_remove_file(&dev->dev, &dev_attr_description);
956 }
957 /*
958 * If device has _EJ0, remove 'eject' file.
959 */
960 if (acpi_has_method(dev->handle, "_EJ0"))
961 device_remove_file(&dev->dev, &dev_attr_eject);
962
963 if (acpi_has_method(dev->handle, "_SUN"))
964 device_remove_file(&dev->dev, &dev_attr_sun);
965
966 if (dev->pnp.unique_id)
967 device_remove_file(&dev->dev, &dev_attr_uid);
968 if (dev->pnp.type.bus_address)
969 device_remove_file(&dev->dev, &dev_attr_adr);
970 device_remove_file(&dev->dev, &dev_attr_modalias);
971 device_remove_file(&dev->dev, &dev_attr_hid);
972 if (acpi_has_method(dev->handle, "_STA"))
973 device_remove_file(&dev->dev, &dev_attr_status);
974 if (dev->handle)
975 device_remove_file(&dev->dev, &dev_attr_path);
976}
977/* --------------------------------------------------------------------------
978 ACPI Bus operations
979 -------------------------------------------------------------------------- */
980
981/**
982 * acpi_of_match_device - Match device object using the "compatible" property.
983 * @adev: ACPI device object to match.
984 * @of_match_table: List of device IDs to match against.
985 *
986 * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
987 * identifiers and a _DSD object with the "compatible" property, use that
988 * property to match against the given list of identifiers.
989 */
990static bool acpi_of_match_device(struct acpi_device *adev,
991 const struct of_device_id *of_match_table)
992{
993 const union acpi_object *of_compatible, *obj;
994 int i, nval;
995
996 if (!adev)
997 return false;
998
999 of_compatible = adev->data.of_compatible;
1000 if (!of_match_table || !of_compatible)
1001 return false;
1002
1003 if (of_compatible->type == ACPI_TYPE_PACKAGE) {
1004 nval = of_compatible->package.count;
1005 obj = of_compatible->package.elements;
1006 } else { /* Must be ACPI_TYPE_STRING. */
1007 nval = 1;
1008 obj = of_compatible;
1009 }
1010 /* Now we can look for the driver DT compatible strings */
1011 for (i = 0; i < nval; i++, obj++) {
1012 const struct of_device_id *id;
1013
1014 for (id = of_match_table; id->compatible[0]; id++)
1015 if (!strcasecmp(obj->string.pointer, id->compatible))
1016 return true;
1017 }
1018
1019 return false;
1020}
1021
1022static bool __acpi_match_device_cls(const struct acpi_device_id *id,
1023 struct acpi_hardware_id *hwid)
1024{
1025 int i, msk, byte_shift;
1026 char buf[3];
1027
1028 if (!id->cls)
1029 return false;
1030
1031 /* Apply class-code bitmask, before checking each class-code byte */
1032 for (i = 1; i <= 3; i++) {
1033 byte_shift = 8 * (3 - i);
1034 msk = (id->cls_msk >> byte_shift) & 0xFF;
1035 if (!msk)
1036 continue;
1037
1038 sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
1039 if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
1040 return false;
1041 }
1042 return true;
1043}
1044
1045static const struct acpi_device_id *__acpi_match_device(
1046 struct acpi_device *device,
1047 const struct acpi_device_id *ids,
1048 const struct of_device_id *of_ids)
1049{
1050 const struct acpi_device_id *id;
1051 struct acpi_hardware_id *hwid;
1052
1053 /*
1054 * If the device is not present, it is unnecessary to load device
1055 * driver for it.
1056 */
1057 if (!device || !device->status.present)
1058 return NULL;
1059
1060 list_for_each_entry(hwid, &device->pnp.ids, list) {
1061 /* First, check the ACPI/PNP IDs provided by the caller. */
1062 for (id = ids; id->id[0] || id->cls; id++) {
1063 if (id->id[0] && !strcmp((char *) id->id, hwid->id))
1064 return id;
1065 else if (id->cls && __acpi_match_device_cls(id, hwid))
1066 return id;
1067 }
1068
1069 /*
1070 * Next, check ACPI_DT_NAMESPACE_HID and try to match the
1071 * "compatible" property if found.
1072 *
1073 * The id returned by the below is not valid, but the only
1074 * caller passing non-NULL of_ids here is only interested in
1075 * whether or not the return value is NULL.
1076 */
1077 if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
1078 && acpi_of_match_device(device, of_ids))
1079 return id;
1080 }
1081 return NULL;
1082}
1083
1084/**
1085 * acpi_match_device - Match a struct device against a given list of ACPI IDs
1086 * @ids: Array of struct acpi_device_id object to match against.
1087 * @dev: The device structure to match.
1088 *
1089 * Check if @dev has a valid ACPI handle and if there is a struct acpi_device
1090 * object for that handle and use that object to match against a given list of
1091 * device IDs.
1092 *
1093 * Return a pointer to the first matching ID on success or %NULL on failure.
1094 */
1095const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
1096 const struct device *dev)
1097{
1098 return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
1099}
1100EXPORT_SYMBOL_GPL(acpi_match_device);
1101
1102int acpi_match_device_ids(struct acpi_device *device,
1103 const struct acpi_device_id *ids)
1104{
1105 return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
1106}
1107EXPORT_SYMBOL(acpi_match_device_ids);
1108
1109bool acpi_driver_match_device(struct device *dev,
1110 const struct device_driver *drv)
1111{
1112 if (!drv->acpi_match_table)
1113 return acpi_of_match_device(ACPI_COMPANION(dev),
1114 drv->of_match_table);
1115
1116 return !!__acpi_match_device(acpi_companion_match(dev),
1117 drv->acpi_match_table, drv->of_match_table);
1118}
1119EXPORT_SYMBOL_GPL(acpi_driver_match_device);
1120
1121static void acpi_free_power_resources_lists(struct acpi_device *device) 446static void acpi_free_power_resources_lists(struct acpi_device *device)
1122{ 447{
1123 int i; 448 int i;
@@ -1144,144 +469,6 @@ static void acpi_device_release(struct device *dev)
1144 kfree(acpi_dev); 469 kfree(acpi_dev);
1145} 470}
1146 471
1147static int acpi_bus_match(struct device *dev, struct device_driver *drv)
1148{
1149 struct acpi_device *acpi_dev = to_acpi_device(dev);
1150 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
1151
1152 return acpi_dev->flags.match_driver
1153 && !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
1154}
1155
1156static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
1157{
1158 return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
1159}
1160
1161static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
1162{
1163 struct acpi_device *device = data;
1164
1165 device->driver->ops.notify(device, event);
1166}
1167
1168static void acpi_device_notify_fixed(void *data)
1169{
1170 struct acpi_device *device = data;
1171
1172 /* Fixed hardware devices have no handles */
1173 acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
1174}
1175
1176static u32 acpi_device_fixed_event(void *data)
1177{
1178 acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
1179 return ACPI_INTERRUPT_HANDLED;
1180}
1181
1182static int acpi_device_install_notify_handler(struct acpi_device *device)
1183{
1184 acpi_status status;
1185
1186 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
1187 status =
1188 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
1189 acpi_device_fixed_event,
1190 device);
1191 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
1192 status =
1193 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
1194 acpi_device_fixed_event,
1195 device);
1196 else
1197 status = acpi_install_notify_handler(device->handle,
1198 ACPI_DEVICE_NOTIFY,
1199 acpi_device_notify,
1200 device);
1201
1202 if (ACPI_FAILURE(status))
1203 return -EINVAL;
1204 return 0;
1205}
1206
1207static void acpi_device_remove_notify_handler(struct acpi_device *device)
1208{
1209 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
1210 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
1211 acpi_device_fixed_event);
1212 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
1213 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
1214 acpi_device_fixed_event);
1215 else
1216 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
1217 acpi_device_notify);
1218}
1219
1220static int acpi_device_probe(struct device *dev)
1221{
1222 struct acpi_device *acpi_dev = to_acpi_device(dev);
1223 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
1224 int ret;
1225
1226 if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
1227 return -EINVAL;
1228
1229 if (!acpi_drv->ops.add)
1230 return -ENOSYS;
1231
1232 ret = acpi_drv->ops.add(acpi_dev);
1233 if (ret)
1234 return ret;
1235
1236 acpi_dev->driver = acpi_drv;
1237 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1238 "Driver [%s] successfully bound to device [%s]\n",
1239 acpi_drv->name, acpi_dev->pnp.bus_id));
1240
1241 if (acpi_drv->ops.notify) {
1242 ret = acpi_device_install_notify_handler(acpi_dev);
1243 if (ret) {
1244 if (acpi_drv->ops.remove)
1245 acpi_drv->ops.remove(acpi_dev);
1246
1247 acpi_dev->driver = NULL;
1248 acpi_dev->driver_data = NULL;
1249 return ret;
1250 }
1251 }
1252
1253 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
1254 acpi_drv->name, acpi_dev->pnp.bus_id));
1255 get_device(dev);
1256 return 0;
1257}
1258
1259static int acpi_device_remove(struct device * dev)
1260{
1261 struct acpi_device *acpi_dev = to_acpi_device(dev);
1262 struct acpi_driver *acpi_drv = acpi_dev->driver;
1263
1264 if (acpi_drv) {
1265 if (acpi_drv->ops.notify)
1266 acpi_device_remove_notify_handler(acpi_dev);
1267 if (acpi_drv->ops.remove)
1268 acpi_drv->ops.remove(acpi_dev);
1269 }
1270 acpi_dev->driver = NULL;
1271 acpi_dev->driver_data = NULL;
1272
1273 put_device(dev);
1274 return 0;
1275}
1276
1277struct bus_type acpi_bus_type = {
1278 .name = "acpi",
1279 .match = acpi_bus_match,
1280 .probe = acpi_device_probe,
1281 .remove = acpi_device_remove,
1282 .uevent = acpi_device_uevent,
1283};
1284
1285static void acpi_device_del(struct acpi_device *device) 472static void acpi_device_del(struct acpi_device *device)
1286{ 473{
1287 mutex_lock(&acpi_device_lock); 474 mutex_lock(&acpi_device_lock);
@@ -1529,47 +716,6 @@ struct acpi_device *acpi_get_next_child(struct device *dev,
1529} 716}
1530 717
1531/* -------------------------------------------------------------------------- 718/* --------------------------------------------------------------------------
1532 Driver Management
1533 -------------------------------------------------------------------------- */
1534/**
1535 * acpi_bus_register_driver - register a driver with the ACPI bus
1536 * @driver: driver being registered
1537 *
1538 * Registers a driver with the ACPI bus. Searches the namespace for all
1539 * devices that match the driver's criteria and binds. Returns zero for
1540 * success or a negative error status for failure.
1541 */
1542int acpi_bus_register_driver(struct acpi_driver *driver)
1543{
1544 int ret;
1545
1546 if (acpi_disabled)
1547 return -ENODEV;
1548 driver->drv.name = driver->name;
1549 driver->drv.bus = &acpi_bus_type;
1550 driver->drv.owner = driver->owner;
1551
1552 ret = driver_register(&driver->drv);
1553 return ret;
1554}
1555
1556EXPORT_SYMBOL(acpi_bus_register_driver);
1557
1558/**
1559 * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
1560 * @driver: driver to unregister
1561 *
1562 * Unregisters a driver with the ACPI bus. Searches the namespace for all
1563 * devices that match the driver's criteria and unbinds.
1564 */
1565void acpi_bus_unregister_driver(struct acpi_driver *driver)
1566{
1567 driver_unregister(&driver->drv);
1568}
1569
1570EXPORT_SYMBOL(acpi_bus_unregister_driver);
1571
1572/* --------------------------------------------------------------------------
1573 Device Enumeration 719 Device Enumeration
1574 -------------------------------------------------------------------------- */ 720 -------------------------------------------------------------------------- */
1575static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) 721static struct acpi_device *acpi_bus_get_parent(acpi_handle handle)
@@ -2744,12 +1890,6 @@ int __init acpi_scan_init(void)
2744{ 1890{
2745 int result; 1891 int result;
2746 1892
2747 result = bus_register(&acpi_bus_type);
2748 if (result) {
2749 /* We don't want to quit even if we failed to add suspend/resume */
2750 printk(KERN_ERR PREFIX "Could not register bus type\n");
2751 }
2752
2753 acpi_pci_root_init(); 1893 acpi_pci_root_init();
2754 acpi_pci_link_init(); 1894 acpi_pci_link_init();
2755 acpi_processor_init(); 1895 acpi_processor_init();
diff --git a/drivers/base/core.c b/drivers/base/core.c
index dafae6d2f7ac..7d6279554afc 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1252,6 +1252,19 @@ void device_unregister(struct device *dev)
1252} 1252}
1253EXPORT_SYMBOL_GPL(device_unregister); 1253EXPORT_SYMBOL_GPL(device_unregister);
1254 1254
1255static struct device *prev_device(struct klist_iter *i)
1256{
1257 struct klist_node *n = klist_prev(i);
1258 struct device *dev = NULL;
1259 struct device_private *p;
1260
1261 if (n) {
1262 p = to_device_private_parent(n);
1263 dev = p->device;
1264 }
1265 return dev;
1266}
1267
1255static struct device *next_device(struct klist_iter *i) 1268static struct device *next_device(struct klist_iter *i)
1256{ 1269{
1257 struct klist_node *n = klist_next(i); 1270 struct klist_node *n = klist_next(i);
@@ -1341,6 +1354,36 @@ int device_for_each_child(struct device *parent, void *data,
1341EXPORT_SYMBOL_GPL(device_for_each_child); 1354EXPORT_SYMBOL_GPL(device_for_each_child);
1342 1355
1343/** 1356/**
1357 * device_for_each_child_reverse - device child iterator in reversed order.
1358 * @parent: parent struct device.
1359 * @fn: function to be called for each device.
1360 * @data: data for the callback.
1361 *
1362 * Iterate over @parent's child devices, and call @fn for each,
1363 * passing it @data.
1364 *
1365 * We check the return of @fn each time. If it returns anything
1366 * other than 0, we break out and return that value.
1367 */
1368int device_for_each_child_reverse(struct device *parent, void *data,
1369 int (*fn)(struct device *dev, void *data))
1370{
1371 struct klist_iter i;
1372 struct device *child;
1373 int error = 0;
1374
1375 if (!parent->p)
1376 return 0;
1377
1378 klist_iter_init(&parent->p->klist_children, &i);
1379 while ((child = prev_device(&i)) && !error)
1380 error = fn(child, data);
1381 klist_iter_exit(&i);
1382 return error;
1383}
1384EXPORT_SYMBOL_GPL(device_for_each_child_reverse);
1385
1386/**
1344 * device_find_child - device iterator for locating a particular device. 1387 * device_find_child - device iterator for locating a particular device.
1345 * @parent: parent struct device 1388 * @parent: parent struct device
1346 * @match: Callback function to check device 1389 * @match: Callback function to check device
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index a638bbb1a27a..2d6df1dd3852 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -399,6 +399,8 @@ EXPORT_SYMBOL_GPL(wait_for_device_probe);
399 * 399 *
400 * This function must be called with @dev lock held. When called for a 400 * This function must be called with @dev lock held. When called for a
401 * USB interface, @dev->parent lock must be held as well. 401 * USB interface, @dev->parent lock must be held as well.
402 *
403 * If the device has a parent, runtime-resume the parent before driver probing.
402 */ 404 */
403int driver_probe_device(struct device_driver *drv, struct device *dev) 405int driver_probe_device(struct device_driver *drv, struct device *dev)
404{ 406{
@@ -410,10 +412,16 @@ int driver_probe_device(struct device_driver *drv, struct device *dev)
410 pr_debug("bus: '%s': %s: matched device %s with driver %s\n", 412 pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
411 drv->bus->name, __func__, dev_name(dev), drv->name); 413 drv->bus->name, __func__, dev_name(dev), drv->name);
412 414
415 if (dev->parent)
416 pm_runtime_get_sync(dev->parent);
417
413 pm_runtime_barrier(dev); 418 pm_runtime_barrier(dev);
414 ret = really_probe(dev, drv); 419 ret = really_probe(dev, drv);
415 pm_request_idle(dev); 420 pm_request_idle(dev);
416 421
422 if (dev->parent)
423 pm_runtime_put(dev->parent);
424
417 return ret; 425 return ret;
418} 426}
419 427
@@ -507,11 +515,17 @@ static void __device_attach_async_helper(void *_dev, async_cookie_t cookie)
507 515
508 device_lock(dev); 516 device_lock(dev);
509 517
518 if (dev->parent)
519 pm_runtime_get_sync(dev->parent);
520
510 bus_for_each_drv(dev->bus, NULL, &data, __device_attach_driver); 521 bus_for_each_drv(dev->bus, NULL, &data, __device_attach_driver);
511 dev_dbg(dev, "async probe completed\n"); 522 dev_dbg(dev, "async probe completed\n");
512 523
513 pm_request_idle(dev); 524 pm_request_idle(dev);
514 525
526 if (dev->parent)
527 pm_runtime_put(dev->parent);
528
515 device_unlock(dev); 529 device_unlock(dev);
516 530
517 put_device(dev); 531 put_device(dev);
@@ -541,6 +555,9 @@ static int __device_attach(struct device *dev, bool allow_async)
541 .want_async = false, 555 .want_async = false,
542 }; 556 };
543 557
558 if (dev->parent)
559 pm_runtime_get_sync(dev->parent);
560
544 ret = bus_for_each_drv(dev->bus, NULL, &data, 561 ret = bus_for_each_drv(dev->bus, NULL, &data,
545 __device_attach_driver); 562 __device_attach_driver);
546 if (!ret && allow_async && data.have_async) { 563 if (!ret && allow_async && data.have_async) {
@@ -557,6 +574,9 @@ static int __device_attach(struct device *dev, bool allow_async)
557 } else { 574 } else {
558 pm_request_idle(dev); 575 pm_request_idle(dev);
559 } 576 }
577
578 if (dev->parent)
579 pm_runtime_put(dev->parent);
560 } 580 }
561out_unlock: 581out_unlock:
562 device_unlock(dev); 582 device_unlock(dev);
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index f1a5d95e7b20..998fa6b23084 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -73,6 +73,8 @@ extern int pm_qos_sysfs_add_resume_latency(struct device *dev);
73extern void pm_qos_sysfs_remove_resume_latency(struct device *dev); 73extern void pm_qos_sysfs_remove_resume_latency(struct device *dev);
74extern int pm_qos_sysfs_add_flags(struct device *dev); 74extern int pm_qos_sysfs_add_flags(struct device *dev);
75extern void pm_qos_sysfs_remove_flags(struct device *dev); 75extern void pm_qos_sysfs_remove_flags(struct device *dev);
76extern int pm_qos_sysfs_add_latency_tolerance(struct device *dev);
77extern void pm_qos_sysfs_remove_latency_tolerance(struct device *dev);
76 78
77#else /* CONFIG_PM */ 79#else /* CONFIG_PM */
78 80
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index e56d538d039e..7f3646e459cb 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -883,3 +883,40 @@ int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
883 mutex_unlock(&dev_pm_qos_mtx); 883 mutex_unlock(&dev_pm_qos_mtx);
884 return ret; 884 return ret;
885} 885}
886
887/**
888 * dev_pm_qos_expose_latency_tolerance - Expose latency tolerance to userspace
889 * @dev: Device whose latency tolerance to expose
890 */
891int dev_pm_qos_expose_latency_tolerance(struct device *dev)
892{
893 int ret;
894
895 if (!dev->power.set_latency_tolerance)
896 return -EINVAL;
897
898 mutex_lock(&dev_pm_qos_sysfs_mtx);
899 ret = pm_qos_sysfs_add_latency_tolerance(dev);
900 mutex_unlock(&dev_pm_qos_sysfs_mtx);
901
902 return ret;
903}
904EXPORT_SYMBOL_GPL(dev_pm_qos_expose_latency_tolerance);
905
906/**
907 * dev_pm_qos_hide_latency_tolerance - Hide latency tolerance from userspace
908 * @dev: Device whose latency tolerance to hide
909 */
910void dev_pm_qos_hide_latency_tolerance(struct device *dev)
911{
912 mutex_lock(&dev_pm_qos_sysfs_mtx);
913 pm_qos_sysfs_remove_latency_tolerance(dev);
914 mutex_unlock(&dev_pm_qos_sysfs_mtx);
915
916 /* Remove the request from user space now */
917 pm_runtime_get_sync(dev);
918 dev_pm_qos_update_user_latency_tolerance(dev,
919 PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT);
920 pm_runtime_put(dev);
921}
922EXPORT_SYMBOL_GPL(dev_pm_qos_hide_latency_tolerance);
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index d2be3f9c211c..a7b46798c81d 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -738,6 +738,17 @@ void pm_qos_sysfs_remove_flags(struct device *dev)
738 sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group); 738 sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group);
739} 739}
740 740
741int pm_qos_sysfs_add_latency_tolerance(struct device *dev)
742{
743 return sysfs_merge_group(&dev->kobj,
744 &pm_qos_latency_tolerance_attr_group);
745}
746
747void pm_qos_sysfs_remove_latency_tolerance(struct device *dev)
748{
749 sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);
750}
751
741void rpm_sysfs_remove(struct device *dev) 752void rpm_sysfs_remove(struct device *dev)
742{ 753{
743 sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group); 754 sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 88d474b78076..bdbbe5bcfb83 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -85,6 +85,14 @@ config INTEL_IOP_ADMA
85 help 85 help
86 Enable support for the Intel(R) IOP Series RAID engines. 86 Enable support for the Intel(R) IOP Series RAID engines.
87 87
88config IDMA64
89 tristate "Intel integrated DMA 64-bit support"
90 select DMA_ENGINE
91 select DMA_VIRTUAL_CHANNELS
92 help
93 Enable DMA support for Intel Low Power Subsystem such as found on
94 Intel Skylake PCH.
95
88source "drivers/dma/dw/Kconfig" 96source "drivers/dma/dw/Kconfig"
89 97
90config AT_HDMAC 98config AT_HDMAC
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 6a4d6f2827da..56ff8c705c00 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_HSU_DMA) += hsu/
14obj-$(CONFIG_MPC512X_DMA) += mpc512x_dma.o 14obj-$(CONFIG_MPC512X_DMA) += mpc512x_dma.o
15obj-$(CONFIG_PPC_BESTCOMM) += bestcomm/ 15obj-$(CONFIG_PPC_BESTCOMM) += bestcomm/
16obj-$(CONFIG_MV_XOR) += mv_xor.o 16obj-$(CONFIG_MV_XOR) += mv_xor.o
17obj-$(CONFIG_IDMA64) += idma64.o
17obj-$(CONFIG_DW_DMAC_CORE) += dw/ 18obj-$(CONFIG_DW_DMAC_CORE) += dw/
18obj-$(CONFIG_AT_HDMAC) += at_hdmac.o 19obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
19obj-$(CONFIG_AT_XDMAC) += at_xdmac.o 20obj-$(CONFIG_AT_XDMAC) += at_xdmac.o
diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
new file mode 100644
index 000000000000..18c14e1f1414
--- /dev/null
+++ b/drivers/dma/idma64.c
@@ -0,0 +1,710 @@
1/*
2 * Core driver for the Intel integrated DMA 64-bit
3 *
4 * Copyright (C) 2015 Intel Corporation
5 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/bitops.h>
13#include <linux/delay.h>
14#include <linux/dmaengine.h>
15#include <linux/dma-mapping.h>
16#include <linux/dmapool.h>
17#include <linux/init.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/slab.h>
21
22#include "idma64.h"
23
24/* Platform driver name */
25#define DRV_NAME "idma64"
26
27/* For now we support only two channels */
28#define IDMA64_NR_CHAN 2
29
30/* ---------------------------------------------------------------------- */
31
32static struct device *chan2dev(struct dma_chan *chan)
33{
34 return &chan->dev->device;
35}
36
37/* ---------------------------------------------------------------------- */
38
39static void idma64_off(struct idma64 *idma64)
40{
41 unsigned short count = 100;
42
43 dma_writel(idma64, CFG, 0);
44
45 channel_clear_bit(idma64, MASK(XFER), idma64->all_chan_mask);
46 channel_clear_bit(idma64, MASK(BLOCK), idma64->all_chan_mask);
47 channel_clear_bit(idma64, MASK(SRC_TRAN), idma64->all_chan_mask);
48 channel_clear_bit(idma64, MASK(DST_TRAN), idma64->all_chan_mask);
49 channel_clear_bit(idma64, MASK(ERROR), idma64->all_chan_mask);
50
51 do {
52 cpu_relax();
53 } while (dma_readl(idma64, CFG) & IDMA64_CFG_DMA_EN && --count);
54}
55
56static void idma64_on(struct idma64 *idma64)
57{
58 dma_writel(idma64, CFG, IDMA64_CFG_DMA_EN);
59}
60
61/* ---------------------------------------------------------------------- */
62
63static void idma64_chan_init(struct idma64 *idma64, struct idma64_chan *idma64c)
64{
65 u32 cfghi = IDMA64C_CFGH_SRC_PER(1) | IDMA64C_CFGH_DST_PER(0);
66 u32 cfglo = 0;
67
68 /* Enforce FIFO drain when channel is suspended */
69 cfglo |= IDMA64C_CFGL_CH_DRAIN;
70
71 /* Set default burst alignment */
72 cfglo |= IDMA64C_CFGL_DST_BURST_ALIGN | IDMA64C_CFGL_SRC_BURST_ALIGN;
73
74 channel_writel(idma64c, CFG_LO, cfglo);
75 channel_writel(idma64c, CFG_HI, cfghi);
76
77 /* Enable interrupts */
78 channel_set_bit(idma64, MASK(XFER), idma64c->mask);
79 channel_set_bit(idma64, MASK(ERROR), idma64c->mask);
80
81 /*
82 * Enforce the controller to be turned on.
83 *
84 * The iDMA is turned off in ->probe() and looses context during system
85 * suspend / resume cycle. That's why we have to enable it each time we
86 * use it.
87 */
88 idma64_on(idma64);
89}
90
91static void idma64_chan_stop(struct idma64 *idma64, struct idma64_chan *idma64c)
92{
93 channel_clear_bit(idma64, CH_EN, idma64c->mask);
94}
95
96static void idma64_chan_start(struct idma64 *idma64, struct idma64_chan *idma64c)
97{
98 struct idma64_desc *desc = idma64c->desc;
99 struct idma64_hw_desc *hw = &desc->hw[0];
100
101 channel_writeq(idma64c, SAR, 0);
102 channel_writeq(idma64c, DAR, 0);
103
104 channel_writel(idma64c, CTL_HI, IDMA64C_CTLH_BLOCK_TS(~0UL));
105 channel_writel(idma64c, CTL_LO, IDMA64C_CTLL_LLP_S_EN | IDMA64C_CTLL_LLP_D_EN);
106
107 channel_writeq(idma64c, LLP, hw->llp);
108
109 channel_set_bit(idma64, CH_EN, idma64c->mask);
110}
111
112static void idma64_stop_transfer(struct idma64_chan *idma64c)
113{
114 struct idma64 *idma64 = to_idma64(idma64c->vchan.chan.device);
115
116 idma64_chan_stop(idma64, idma64c);
117}
118
119static void idma64_start_transfer(struct idma64_chan *idma64c)
120{
121 struct idma64 *idma64 = to_idma64(idma64c->vchan.chan.device);
122 struct virt_dma_desc *vdesc;
123
124 /* Get the next descriptor */
125 vdesc = vchan_next_desc(&idma64c->vchan);
126 if (!vdesc) {
127 idma64c->desc = NULL;
128 return;
129 }
130
131 list_del(&vdesc->node);
132 idma64c->desc = to_idma64_desc(vdesc);
133
134 /* Configure the channel */
135 idma64_chan_init(idma64, idma64c);
136
137 /* Start the channel with a new descriptor */
138 idma64_chan_start(idma64, idma64c);
139}
140
141/* ---------------------------------------------------------------------- */
142
143static void idma64_chan_irq(struct idma64 *idma64, unsigned short c,
144 u32 status_err, u32 status_xfer)
145{
146 struct idma64_chan *idma64c = &idma64->chan[c];
147 struct idma64_desc *desc;
148 unsigned long flags;
149
150 spin_lock_irqsave(&idma64c->vchan.lock, flags);
151 desc = idma64c->desc;
152 if (desc) {
153 if (status_err & (1 << c)) {
154 dma_writel(idma64, CLEAR(ERROR), idma64c->mask);
155 desc->status = DMA_ERROR;
156 } else if (status_xfer & (1 << c)) {
157 dma_writel(idma64, CLEAR(XFER), idma64c->mask);
158 desc->status = DMA_COMPLETE;
159 vchan_cookie_complete(&desc->vdesc);
160 idma64_start_transfer(idma64c);
161 }
162
163 /* idma64_start_transfer() updates idma64c->desc */
164 if (idma64c->desc == NULL || desc->status == DMA_ERROR)
165 idma64_stop_transfer(idma64c);
166 }
167 spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
168}
169
170static irqreturn_t idma64_irq(int irq, void *dev)
171{
172 struct idma64 *idma64 = dev;
173 u32 status = dma_readl(idma64, STATUS_INT);
174 u32 status_xfer;
175 u32 status_err;
176 unsigned short i;
177
178 dev_vdbg(idma64->dma.dev, "%s: status=%#x\n", __func__, status);
179
180 /* Check if we have any interrupt from the DMA controller */
181 if (!status)
182 return IRQ_NONE;
183
184 /* Disable interrupts */
185 channel_clear_bit(idma64, MASK(XFER), idma64->all_chan_mask);
186 channel_clear_bit(idma64, MASK(ERROR), idma64->all_chan_mask);
187
188 status_xfer = dma_readl(idma64, RAW(XFER));
189 status_err = dma_readl(idma64, RAW(ERROR));
190
191 for (i = 0; i < idma64->dma.chancnt; i++)
192 idma64_chan_irq(idma64, i, status_err, status_xfer);
193
194 /* Re-enable interrupts */
195 channel_set_bit(idma64, MASK(XFER), idma64->all_chan_mask);
196 channel_set_bit(idma64, MASK(ERROR), idma64->all_chan_mask);
197
198 return IRQ_HANDLED;
199}
200
201/* ---------------------------------------------------------------------- */
202
203static struct idma64_desc *idma64_alloc_desc(unsigned int ndesc)
204{
205 struct idma64_desc *desc;
206
207 desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
208 if (!desc)
209 return NULL;
210
211 desc->hw = kcalloc(ndesc, sizeof(*desc->hw), GFP_NOWAIT);
212 if (!desc->hw) {
213 kfree(desc);
214 return NULL;
215 }
216
217 return desc;
218}
219
220static void idma64_desc_free(struct idma64_chan *idma64c,
221 struct idma64_desc *desc)
222{
223 struct idma64_hw_desc *hw;
224
225 if (desc->ndesc) {
226 unsigned int i = desc->ndesc;
227
228 do {
229 hw = &desc->hw[--i];
230 dma_pool_free(idma64c->pool, hw->lli, hw->llp);
231 } while (i);
232 }
233
234 kfree(desc->hw);
235 kfree(desc);
236}
237
238static void idma64_vdesc_free(struct virt_dma_desc *vdesc)
239{
240 struct idma64_chan *idma64c = to_idma64_chan(vdesc->tx.chan);
241
242 idma64_desc_free(idma64c, to_idma64_desc(vdesc));
243}
244
245static u64 idma64_hw_desc_fill(struct idma64_hw_desc *hw,
246 struct dma_slave_config *config,
247 enum dma_transfer_direction direction, u64 llp)
248{
249 struct idma64_lli *lli = hw->lli;
250 u64 sar, dar;
251 u32 ctlhi = IDMA64C_CTLH_BLOCK_TS(hw->len);
252 u32 ctllo = IDMA64C_CTLL_LLP_S_EN | IDMA64C_CTLL_LLP_D_EN;
253 u32 src_width, dst_width;
254
255 if (direction == DMA_MEM_TO_DEV) {
256 sar = hw->phys;
257 dar = config->dst_addr;
258 ctllo |= IDMA64C_CTLL_DST_FIX | IDMA64C_CTLL_SRC_INC |
259 IDMA64C_CTLL_FC_M2P;
260 src_width = min_t(u32, 2, __fls(sar | hw->len));
261 dst_width = __fls(config->dst_addr_width);
262 } else { /* DMA_DEV_TO_MEM */
263 sar = config->src_addr;
264 dar = hw->phys;
265 ctllo |= IDMA64C_CTLL_DST_INC | IDMA64C_CTLL_SRC_FIX |
266 IDMA64C_CTLL_FC_P2M;
267 src_width = __fls(config->src_addr_width);
268 dst_width = min_t(u32, 2, __fls(dar | hw->len));
269 }
270
271 lli->sar = sar;
272 lli->dar = dar;
273
274 lli->ctlhi = ctlhi;
275 lli->ctllo = ctllo |
276 IDMA64C_CTLL_SRC_MSIZE(config->src_maxburst) |
277 IDMA64C_CTLL_DST_MSIZE(config->dst_maxburst) |
278 IDMA64C_CTLL_DST_WIDTH(dst_width) |
279 IDMA64C_CTLL_SRC_WIDTH(src_width);
280
281 lli->llp = llp;
282 return hw->llp;
283}
284
285static void idma64_desc_fill(struct idma64_chan *idma64c,
286 struct idma64_desc *desc)
287{
288 struct dma_slave_config *config = &idma64c->config;
289 struct idma64_hw_desc *hw = &desc->hw[desc->ndesc - 1];
290 struct idma64_lli *lli = hw->lli;
291 u64 llp = 0;
292 unsigned int i = desc->ndesc;
293
294 /* Fill the hardware descriptors and link them to a list */
295 do {
296 hw = &desc->hw[--i];
297 llp = idma64_hw_desc_fill(hw, config, desc->direction, llp);
298 desc->length += hw->len;
299 } while (i);
300
301 /* Trigger interrupt after last block */
302 lli->ctllo |= IDMA64C_CTLL_INT_EN;
303}
304
305static struct dma_async_tx_descriptor *idma64_prep_slave_sg(
306 struct dma_chan *chan, struct scatterlist *sgl,
307 unsigned int sg_len, enum dma_transfer_direction direction,
308 unsigned long flags, void *context)
309{
310 struct idma64_chan *idma64c = to_idma64_chan(chan);
311 struct idma64_desc *desc;
312 struct scatterlist *sg;
313 unsigned int i;
314
315 desc = idma64_alloc_desc(sg_len);
316 if (!desc)
317 return NULL;
318
319 for_each_sg(sgl, sg, sg_len, i) {
320 struct idma64_hw_desc *hw = &desc->hw[i];
321
322 /* Allocate DMA capable memory for hardware descriptor */
323 hw->lli = dma_pool_alloc(idma64c->pool, GFP_NOWAIT, &hw->llp);
324 if (!hw->lli) {
325 desc->ndesc = i;
326 idma64_desc_free(idma64c, desc);
327 return NULL;
328 }
329
330 hw->phys = sg_dma_address(sg);
331 hw->len = sg_dma_len(sg);
332 }
333
334 desc->ndesc = sg_len;
335 desc->direction = direction;
336 desc->status = DMA_IN_PROGRESS;
337
338 idma64_desc_fill(idma64c, desc);
339 return vchan_tx_prep(&idma64c->vchan, &desc->vdesc, flags);
340}
341
342static void idma64_issue_pending(struct dma_chan *chan)
343{
344 struct idma64_chan *idma64c = to_idma64_chan(chan);
345 unsigned long flags;
346
347 spin_lock_irqsave(&idma64c->vchan.lock, flags);
348 if (vchan_issue_pending(&idma64c->vchan) && !idma64c->desc)
349 idma64_start_transfer(idma64c);
350 spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
351}
352
353static size_t idma64_active_desc_size(struct idma64_chan *idma64c)
354{
355 struct idma64_desc *desc = idma64c->desc;
356 struct idma64_hw_desc *hw;
357 size_t bytes = desc->length;
358 u64 llp;
359 u32 ctlhi;
360 unsigned int i = 0;
361
362 llp = channel_readq(idma64c, LLP);
363 do {
364 hw = &desc->hw[i];
365 } while ((hw->llp != llp) && (++i < desc->ndesc));
366
367 if (!i)
368 return bytes;
369
370 do {
371 bytes -= desc->hw[--i].len;
372 } while (i);
373
374 ctlhi = channel_readl(idma64c, CTL_HI);
375 return bytes - IDMA64C_CTLH_BLOCK_TS(ctlhi);
376}
377
378static enum dma_status idma64_tx_status(struct dma_chan *chan,
379 dma_cookie_t cookie, struct dma_tx_state *state)
380{
381 struct idma64_chan *idma64c = to_idma64_chan(chan);
382 struct virt_dma_desc *vdesc;
383 enum dma_status status;
384 size_t bytes;
385 unsigned long flags;
386
387 status = dma_cookie_status(chan, cookie, state);
388 if (status == DMA_COMPLETE)
389 return status;
390
391 spin_lock_irqsave(&idma64c->vchan.lock, flags);
392 vdesc = vchan_find_desc(&idma64c->vchan, cookie);
393 if (idma64c->desc && cookie == idma64c->desc->vdesc.tx.cookie) {
394 bytes = idma64_active_desc_size(idma64c);
395 dma_set_residue(state, bytes);
396 status = idma64c->desc->status;
397 } else if (vdesc) {
398 bytes = to_idma64_desc(vdesc)->length;
399 dma_set_residue(state, bytes);
400 }
401 spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
402
403 return status;
404}
405
406static void convert_burst(u32 *maxburst)
407{
408 if (*maxburst)
409 *maxburst = __fls(*maxburst);
410 else
411 *maxburst = 0;
412}
413
414static int idma64_slave_config(struct dma_chan *chan,
415 struct dma_slave_config *config)
416{
417 struct idma64_chan *idma64c = to_idma64_chan(chan);
418
419 /* Check if chan will be configured for slave transfers */
420 if (!is_slave_direction(config->direction))
421 return -EINVAL;
422
423 memcpy(&idma64c->config, config, sizeof(idma64c->config));
424
425 convert_burst(&idma64c->config.src_maxburst);
426 convert_burst(&idma64c->config.dst_maxburst);
427
428 return 0;
429}
430
431static void idma64_chan_deactivate(struct idma64_chan *idma64c)
432{
433 unsigned short count = 100;
434 u32 cfglo;
435
436 cfglo = channel_readl(idma64c, CFG_LO);
437 channel_writel(idma64c, CFG_LO, cfglo | IDMA64C_CFGL_CH_SUSP);
438 do {
439 udelay(1);
440 cfglo = channel_readl(idma64c, CFG_LO);
441 } while (!(cfglo & IDMA64C_CFGL_FIFO_EMPTY) && --count);
442}
443
444static void idma64_chan_activate(struct idma64_chan *idma64c)
445{
446 u32 cfglo;
447
448 cfglo = channel_readl(idma64c, CFG_LO);
449 channel_writel(idma64c, CFG_LO, cfglo & ~IDMA64C_CFGL_CH_SUSP);
450}
451
452static int idma64_pause(struct dma_chan *chan)
453{
454 struct idma64_chan *idma64c = to_idma64_chan(chan);
455 unsigned long flags;
456
457 spin_lock_irqsave(&idma64c->vchan.lock, flags);
458 if (idma64c->desc && idma64c->desc->status == DMA_IN_PROGRESS) {
459 idma64_chan_deactivate(idma64c);
460 idma64c->desc->status = DMA_PAUSED;
461 }
462 spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
463
464 return 0;
465}
466
467static int idma64_resume(struct dma_chan *chan)
468{
469 struct idma64_chan *idma64c = to_idma64_chan(chan);
470 unsigned long flags;
471
472 spin_lock_irqsave(&idma64c->vchan.lock, flags);
473 if (idma64c->desc && idma64c->desc->status == DMA_PAUSED) {
474 idma64c->desc->status = DMA_IN_PROGRESS;
475 idma64_chan_activate(idma64c);
476 }
477 spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
478
479 return 0;
480}
481
482static int idma64_terminate_all(struct dma_chan *chan)
483{
484 struct idma64_chan *idma64c = to_idma64_chan(chan);
485 unsigned long flags;
486 LIST_HEAD(head);
487
488 spin_lock_irqsave(&idma64c->vchan.lock, flags);
489 idma64_chan_deactivate(idma64c);
490 idma64_stop_transfer(idma64c);
491 if (idma64c->desc) {
492 idma64_vdesc_free(&idma64c->desc->vdesc);
493 idma64c->desc = NULL;
494 }
495 vchan_get_all_descriptors(&idma64c->vchan, &head);
496 spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
497
498 vchan_dma_desc_free_list(&idma64c->vchan, &head);
499 return 0;
500}
501
502static int idma64_alloc_chan_resources(struct dma_chan *chan)
503{
504 struct idma64_chan *idma64c = to_idma64_chan(chan);
505
506 /* Create a pool of consistent memory blocks for hardware descriptors */
507 idma64c->pool = dma_pool_create(dev_name(chan2dev(chan)),
508 chan->device->dev,
509 sizeof(struct idma64_lli), 8, 0);
510 if (!idma64c->pool) {
511 dev_err(chan2dev(chan), "No memory for descriptors\n");
512 return -ENOMEM;
513 }
514
515 return 0;
516}
517
518static void idma64_free_chan_resources(struct dma_chan *chan)
519{
520 struct idma64_chan *idma64c = to_idma64_chan(chan);
521
522 vchan_free_chan_resources(to_virt_chan(chan));
523 dma_pool_destroy(idma64c->pool);
524 idma64c->pool = NULL;
525}
526
527/* ---------------------------------------------------------------------- */
528
529#define IDMA64_BUSWIDTHS \
530 BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
531 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
532 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)
533
534static int idma64_probe(struct idma64_chip *chip)
535{
536 struct idma64 *idma64;
537 unsigned short nr_chan = IDMA64_NR_CHAN;
538 unsigned short i;
539 int ret;
540
541 idma64 = devm_kzalloc(chip->dev, sizeof(*idma64), GFP_KERNEL);
542 if (!idma64)
543 return -ENOMEM;
544
545 idma64->regs = chip->regs;
546 chip->idma64 = idma64;
547
548 idma64->chan = devm_kcalloc(chip->dev, nr_chan, sizeof(*idma64->chan),
549 GFP_KERNEL);
550 if (!idma64->chan)
551 return -ENOMEM;
552
553 idma64->all_chan_mask = (1 << nr_chan) - 1;
554
555 /* Turn off iDMA controller */
556 idma64_off(idma64);
557
558 ret = devm_request_irq(chip->dev, chip->irq, idma64_irq, IRQF_SHARED,
559 dev_name(chip->dev), idma64);
560 if (ret)
561 return ret;
562
563 INIT_LIST_HEAD(&idma64->dma.channels);
564 for (i = 0; i < nr_chan; i++) {
565 struct idma64_chan *idma64c = &idma64->chan[i];
566
567 idma64c->vchan.desc_free = idma64_vdesc_free;
568 vchan_init(&idma64c->vchan, &idma64->dma);
569
570 idma64c->regs = idma64->regs + i * IDMA64_CH_LENGTH;
571 idma64c->mask = BIT(i);
572 }
573
574 dma_cap_set(DMA_SLAVE, idma64->dma.cap_mask);
575 dma_cap_set(DMA_PRIVATE, idma64->dma.cap_mask);
576
577 idma64->dma.device_alloc_chan_resources = idma64_alloc_chan_resources;
578 idma64->dma.device_free_chan_resources = idma64_free_chan_resources;
579
580 idma64->dma.device_prep_slave_sg = idma64_prep_slave_sg;
581
582 idma64->dma.device_issue_pending = idma64_issue_pending;
583 idma64->dma.device_tx_status = idma64_tx_status;
584
585 idma64->dma.device_config = idma64_slave_config;
586 idma64->dma.device_pause = idma64_pause;
587 idma64->dma.device_resume = idma64_resume;
588 idma64->dma.device_terminate_all = idma64_terminate_all;
589
590 idma64->dma.src_addr_widths = IDMA64_BUSWIDTHS;
591 idma64->dma.dst_addr_widths = IDMA64_BUSWIDTHS;
592 idma64->dma.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
593 idma64->dma.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
594
595 idma64->dma.dev = chip->dev;
596
597 ret = dma_async_device_register(&idma64->dma);
598 if (ret)
599 return ret;
600
601 dev_info(chip->dev, "Found Intel integrated DMA 64-bit\n");
602 return 0;
603}
604
605static int idma64_remove(struct idma64_chip *chip)
606{
607 struct idma64 *idma64 = chip->idma64;
608 unsigned short i;
609
610 dma_async_device_unregister(&idma64->dma);
611
612 /*
613 * Explicitly call devm_request_irq() to avoid the side effects with
614 * the scheduled tasklets.
615 */
616 devm_free_irq(chip->dev, chip->irq, idma64);
617
618 for (i = 0; i < idma64->dma.chancnt; i++) {
619 struct idma64_chan *idma64c = &idma64->chan[i];
620
621 tasklet_kill(&idma64c->vchan.task);
622 }
623
624 return 0;
625}
626
627/* ---------------------------------------------------------------------- */
628
629static int idma64_platform_probe(struct platform_device *pdev)
630{
631 struct idma64_chip *chip;
632 struct device *dev = &pdev->dev;
633 struct resource *mem;
634 int ret;
635
636 chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
637 if (!chip)
638 return -ENOMEM;
639
640 chip->irq = platform_get_irq(pdev, 0);
641 if (chip->irq < 0)
642 return chip->irq;
643
644 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
645 chip->regs = devm_ioremap_resource(dev, mem);
646 if (IS_ERR(chip->regs))
647 return PTR_ERR(chip->regs);
648
649 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
650 if (ret)
651 return ret;
652
653 chip->dev = dev;
654
655 ret = idma64_probe(chip);
656 if (ret)
657 return ret;
658
659 platform_set_drvdata(pdev, chip);
660 return 0;
661}
662
663static int idma64_platform_remove(struct platform_device *pdev)
664{
665 struct idma64_chip *chip = platform_get_drvdata(pdev);
666
667 return idma64_remove(chip);
668}
669
670#ifdef CONFIG_PM_SLEEP
671
672static int idma64_pm_suspend(struct device *dev)
673{
674 struct platform_device *pdev = to_platform_device(dev);
675 struct idma64_chip *chip = platform_get_drvdata(pdev);
676
677 idma64_off(chip->idma64);
678 return 0;
679}
680
681static int idma64_pm_resume(struct device *dev)
682{
683 struct platform_device *pdev = to_platform_device(dev);
684 struct idma64_chip *chip = platform_get_drvdata(pdev);
685
686 idma64_on(chip->idma64);
687 return 0;
688}
689
690#endif /* CONFIG_PM_SLEEP */
691
692static const struct dev_pm_ops idma64_dev_pm_ops = {
693 SET_SYSTEM_SLEEP_PM_OPS(idma64_pm_suspend, idma64_pm_resume)
694};
695
696static struct platform_driver idma64_platform_driver = {
697 .probe = idma64_platform_probe,
698 .remove = idma64_platform_remove,
699 .driver = {
700 .name = DRV_NAME,
701 .pm = &idma64_dev_pm_ops,
702 },
703};
704
705module_platform_driver(idma64_platform_driver);
706
707MODULE_LICENSE("GPL v2");
708MODULE_DESCRIPTION("iDMA64 core driver");
709MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
710MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/dma/idma64.h b/drivers/dma/idma64.h
new file mode 100644
index 000000000000..a4d99685a7c4
--- /dev/null
+++ b/drivers/dma/idma64.h
@@ -0,0 +1,233 @@
1/*
2 * Driver for the Intel integrated DMA 64-bit
3 *
4 * Copyright (C) 2015 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef __DMA_IDMA64_H__
12#define __DMA_IDMA64_H__
13
14#include <linux/device.h>
15#include <linux/io.h>
16#include <linux/spinlock.h>
17#include <linux/types.h>
18
19#include "virt-dma.h"
20
21/* Channel registers */
22
23#define IDMA64_CH_SAR 0x00 /* Source Address Register */
24#define IDMA64_CH_DAR 0x08 /* Destination Address Register */
25#define IDMA64_CH_LLP 0x10 /* Linked List Pointer */
26#define IDMA64_CH_CTL_LO 0x18 /* Control Register Low */
27#define IDMA64_CH_CTL_HI 0x1c /* Control Register High */
28#define IDMA64_CH_SSTAT 0x20
29#define IDMA64_CH_DSTAT 0x28
30#define IDMA64_CH_SSTATAR 0x30
31#define IDMA64_CH_DSTATAR 0x38
32#define IDMA64_CH_CFG_LO 0x40 /* Configuration Register Low */
33#define IDMA64_CH_CFG_HI 0x44 /* Configuration Register High */
34#define IDMA64_CH_SGR 0x48
35#define IDMA64_CH_DSR 0x50
36
37#define IDMA64_CH_LENGTH 0x58
38
39/* Bitfields in CTL_LO */
40#define IDMA64C_CTLL_INT_EN (1 << 0) /* irqs enabled? */
41#define IDMA64C_CTLL_DST_WIDTH(x) ((x) << 1) /* bytes per element */
42#define IDMA64C_CTLL_SRC_WIDTH(x) ((x) << 4)
43#define IDMA64C_CTLL_DST_INC (0 << 8) /* DAR update/not */
44#define IDMA64C_CTLL_DST_FIX (1 << 8)
45#define IDMA64C_CTLL_SRC_INC (0 << 10) /* SAR update/not */
46#define IDMA64C_CTLL_SRC_FIX (1 << 10)
47#define IDMA64C_CTLL_DST_MSIZE(x) ((x) << 11) /* burst, #elements */
48#define IDMA64C_CTLL_SRC_MSIZE(x) ((x) << 14)
49#define IDMA64C_CTLL_FC_M2P (1 << 20) /* mem-to-periph */
50#define IDMA64C_CTLL_FC_P2M (2 << 20) /* periph-to-mem */
51#define IDMA64C_CTLL_LLP_D_EN (1 << 27) /* dest block chain */
52#define IDMA64C_CTLL_LLP_S_EN (1 << 28) /* src block chain */
53
54/* Bitfields in CTL_HI */
55#define IDMA64C_CTLH_BLOCK_TS(x) ((x) & ((1 << 17) - 1))
56#define IDMA64C_CTLH_DONE (1 << 17)
57
58/* Bitfields in CFG_LO */
59#define IDMA64C_CFGL_DST_BURST_ALIGN (1 << 0) /* dst burst align */
60#define IDMA64C_CFGL_SRC_BURST_ALIGN (1 << 1) /* src burst align */
61#define IDMA64C_CFGL_CH_SUSP (1 << 8)
62#define IDMA64C_CFGL_FIFO_EMPTY (1 << 9)
63#define IDMA64C_CFGL_CH_DRAIN (1 << 10) /* drain FIFO */
64#define IDMA64C_CFGL_DST_OPT_BL (1 << 20) /* optimize dst burst length */
65#define IDMA64C_CFGL_SRC_OPT_BL (1 << 21) /* optimize src burst length */
66
67/* Bitfields in CFG_HI */
68#define IDMA64C_CFGH_SRC_PER(x) ((x) << 0) /* src peripheral */
69#define IDMA64C_CFGH_DST_PER(x) ((x) << 4) /* dst peripheral */
70#define IDMA64C_CFGH_RD_ISSUE_THD(x) ((x) << 8)
71#define IDMA64C_CFGH_RW_ISSUE_THD(x) ((x) << 18)
72
73/* Interrupt registers */
74
75#define IDMA64_INT_XFER 0x00
76#define IDMA64_INT_BLOCK 0x08
77#define IDMA64_INT_SRC_TRAN 0x10
78#define IDMA64_INT_DST_TRAN 0x18
79#define IDMA64_INT_ERROR 0x20
80
81#define IDMA64_RAW(x) (0x2c0 + IDMA64_INT_##x) /* r */
82#define IDMA64_STATUS(x) (0x2e8 + IDMA64_INT_##x) /* r (raw & mask) */
83#define IDMA64_MASK(x) (0x310 + IDMA64_INT_##x) /* rw (set = irq enabled) */
84#define IDMA64_CLEAR(x) (0x338 + IDMA64_INT_##x) /* w (ack, affects "raw") */
85
86/* Common registers */
87
88#define IDMA64_STATUS_INT 0x360 /* r */
89#define IDMA64_CFG 0x398
90#define IDMA64_CH_EN 0x3a0
91
92/* Bitfields in CFG */
93#define IDMA64_CFG_DMA_EN (1 << 0)
94
95/* Hardware descriptor for Linked LIst transfers */
96struct idma64_lli {
97 u64 sar;
98 u64 dar;
99 u64 llp;
100 u32 ctllo;
101 u32 ctlhi;
102 u32 sstat;
103 u32 dstat;
104};
105
106struct idma64_hw_desc {
107 struct idma64_lli *lli;
108 dma_addr_t llp;
109 dma_addr_t phys;
110 unsigned int len;
111};
112
113struct idma64_desc {
114 struct virt_dma_desc vdesc;
115 enum dma_transfer_direction direction;
116 struct idma64_hw_desc *hw;
117 unsigned int ndesc;
118 size_t length;
119 enum dma_status status;
120};
121
122static inline struct idma64_desc *to_idma64_desc(struct virt_dma_desc *vdesc)
123{
124 return container_of(vdesc, struct idma64_desc, vdesc);
125}
126
127struct idma64_chan {
128 struct virt_dma_chan vchan;
129
130 void __iomem *regs;
131
132 /* hardware configuration */
133 enum dma_transfer_direction direction;
134 unsigned int mask;
135 struct dma_slave_config config;
136
137 void *pool;
138 struct idma64_desc *desc;
139};
140
141static inline struct idma64_chan *to_idma64_chan(struct dma_chan *chan)
142{
143 return container_of(chan, struct idma64_chan, vchan.chan);
144}
145
146#define channel_set_bit(idma64, reg, mask) \
147 dma_writel(idma64, reg, ((mask) << 8) | (mask))
148#define channel_clear_bit(idma64, reg, mask) \
149 dma_writel(idma64, reg, ((mask) << 8) | 0)
150
151static inline u32 idma64c_readl(struct idma64_chan *idma64c, int offset)
152{
153 return readl(idma64c->regs + offset);
154}
155
156static inline void idma64c_writel(struct idma64_chan *idma64c, int offset,
157 u32 value)
158{
159 writel(value, idma64c->regs + offset);
160}
161
162#define channel_readl(idma64c, reg) \
163 idma64c_readl(idma64c, IDMA64_CH_##reg)
164#define channel_writel(idma64c, reg, value) \
165 idma64c_writel(idma64c, IDMA64_CH_##reg, (value))
166
167static inline u64 idma64c_readq(struct idma64_chan *idma64c, int offset)
168{
169 u64 l, h;
170
171 l = idma64c_readl(idma64c, offset);
172 h = idma64c_readl(idma64c, offset + 4);
173
174 return l | (h << 32);
175}
176
177static inline void idma64c_writeq(struct idma64_chan *idma64c, int offset,
178 u64 value)
179{
180 idma64c_writel(idma64c, offset, value);
181 idma64c_writel(idma64c, offset + 4, value >> 32);
182}
183
184#define channel_readq(idma64c, reg) \
185 idma64c_readq(idma64c, IDMA64_CH_##reg)
186#define channel_writeq(idma64c, reg, value) \
187 idma64c_writeq(idma64c, IDMA64_CH_##reg, (value))
188
189struct idma64 {
190 struct dma_device dma;
191
192 void __iomem *regs;
193
194 /* channels */
195 unsigned short all_chan_mask;
196 struct idma64_chan *chan;
197};
198
199static inline struct idma64 *to_idma64(struct dma_device *ddev)
200{
201 return container_of(ddev, struct idma64, dma);
202}
203
204static inline u32 idma64_readl(struct idma64 *idma64, int offset)
205{
206 return readl(idma64->regs + offset);
207}
208
209static inline void idma64_writel(struct idma64 *idma64, int offset, u32 value)
210{
211 writel(value, idma64->regs + offset);
212}
213
214#define dma_readl(idma64, reg) \
215 idma64_readl(idma64, IDMA64_##reg)
216#define dma_writel(idma64, reg, value) \
217 idma64_writel(idma64, IDMA64_##reg, (value))
218
219/**
220 * struct idma64_chip - representation of DesignWare DMA controller hardware
221 * @dev: struct device of the DMA controller
222 * @irq: irq line
223 * @regs: memory mapped I/O space
224 * @idma64: struct idma64 that is filed by idma64_probe()
225 */
226struct idma64_chip {
227 struct device *dev;
228 int irq;
229 void __iomem *regs;
230 struct idma64 *idma64;
231};
232
233#endif /* __DMA_IDMA64_H__ */
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 653815950aa2..268b6dd79acc 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -328,6 +328,29 @@ config INTEL_SOC_PMIC
328 thermal, charger and related power management functions 328 thermal, charger and related power management functions
329 on these systems. 329 on these systems.
330 330
331config MFD_INTEL_LPSS
332 tristate
333 select COMMON_CLK
334 select MFD_CORE
335
336config MFD_INTEL_LPSS_ACPI
337 tristate "Intel Low Power Subsystem support in ACPI mode"
338 select MFD_INTEL_LPSS
339 depends on X86 && ACPI
340 help
341 This driver supports Intel Low Power Subsystem (LPSS) devices such as
342 I2C, SPI and HS-UART starting from Intel Sunrisepoint (Intel Skylake
343 PCH) in ACPI mode.
344
345config MFD_INTEL_LPSS_PCI
346 tristate "Intel Low Power Subsystem support in PCI mode"
347 select MFD_INTEL_LPSS
348 depends on X86 && PCI
349 help
350 This driver supports Intel Low Power Subsystem (LPSS) devices such as
351 I2C, SPI and HS-UART starting from Intel Sunrisepoint (Intel Skylake
352 PCH) in PCI mode.
353
331config MFD_INTEL_MSIC 354config MFD_INTEL_MSIC
332 bool "Intel MSIC" 355 bool "Intel MSIC"
333 depends on INTEL_SCU_IPC 356 depends on INTEL_SCU_IPC
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ea40e076cb61..9d730a2d1878 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -161,6 +161,9 @@ obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o
161obj-$(CONFIG_MFD_TPS65090) += tps65090.o 161obj-$(CONFIG_MFD_TPS65090) += tps65090.o
162obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o 162obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o
163obj-$(CONFIG_MFD_ATMEL_HLCDC) += atmel-hlcdc.o 163obj-$(CONFIG_MFD_ATMEL_HLCDC) += atmel-hlcdc.o
164obj-$(CONFIG_MFD_INTEL_LPSS) += intel-lpss.o
165obj-$(CONFIG_MFD_INTEL_LPSS_PCI) += intel-lpss-pci.o
166obj-$(CONFIG_MFD_INTEL_LPSS_ACPI) += intel-lpss-acpi.o
164obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o 167obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
165obj-$(CONFIG_MFD_PALMAS) += palmas.o 168obj-$(CONFIG_MFD_PALMAS) += palmas.o
166obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o 169obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o
diff --git a/drivers/mfd/intel-lpss-acpi.c b/drivers/mfd/intel-lpss-acpi.c
new file mode 100644
index 000000000000..0d92d73bfa0e
--- /dev/null
+++ b/drivers/mfd/intel-lpss-acpi.c
@@ -0,0 +1,84 @@
1/*
2 * Intel LPSS ACPI support.
3 *
4 * Copyright (C) 2015, Intel Corporation
5 *
6 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/acpi.h>
15#include <linux/ioport.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/pm.h>
19#include <linux/pm_runtime.h>
20#include <linux/platform_device.h>
21
22#include "intel-lpss.h"
23
24static const struct intel_lpss_platform_info spt_info = {
25 .clk_rate = 120000000,
26};
27
28static const struct acpi_device_id intel_lpss_acpi_ids[] = {
29 /* SPT */
30 { "INT3446", (kernel_ulong_t)&spt_info },
31 { "INT3447", (kernel_ulong_t)&spt_info },
32 { }
33};
34MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
35
36static int intel_lpss_acpi_probe(struct platform_device *pdev)
37{
38 struct intel_lpss_platform_info *info;
39 const struct acpi_device_id *id;
40
41 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
42 if (!id)
43 return -ENODEV;
44
45 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
46 GFP_KERNEL);
47 if (!info)
48 return -ENOMEM;
49
50 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
51 info->irq = platform_get_irq(pdev, 0);
52
53 pm_runtime_set_active(&pdev->dev);
54 pm_runtime_enable(&pdev->dev);
55
56 return intel_lpss_probe(&pdev->dev, info);
57}
58
59static int intel_lpss_acpi_remove(struct platform_device *pdev)
60{
61 intel_lpss_remove(&pdev->dev);
62 pm_runtime_disable(&pdev->dev);
63
64 return 0;
65}
66
67static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
68
69static struct platform_driver intel_lpss_acpi_driver = {
70 .probe = intel_lpss_acpi_probe,
71 .remove = intel_lpss_acpi_remove,
72 .driver = {
73 .name = "intel-lpss",
74 .acpi_match_table = intel_lpss_acpi_ids,
75 .pm = &intel_lpss_acpi_pm_ops,
76 },
77};
78
79module_platform_driver(intel_lpss_acpi_driver);
80
81MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
82MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
83MODULE_DESCRIPTION("Intel LPSS ACPI driver");
84MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-pci.c
new file mode 100644
index 000000000000..9236dffeb4d6
--- /dev/null
+++ b/drivers/mfd/intel-lpss-pci.c
@@ -0,0 +1,113 @@
1/*
2 * Intel LPSS PCI support.
3 *
4 * Copyright (C) 2015, Intel Corporation
5 *
6 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/ioport.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/pci.h>
18#include <linux/pm.h>
19#include <linux/pm_runtime.h>
20
21#include "intel-lpss.h"
22
23static int intel_lpss_pci_probe(struct pci_dev *pdev,
24 const struct pci_device_id *id)
25{
26 struct intel_lpss_platform_info *info;
27 int ret;
28
29 ret = pcim_enable_device(pdev);
30 if (ret)
31 return ret;
32
33 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
34 GFP_KERNEL);
35 if (!info)
36 return -ENOMEM;
37
38 info->mem = &pdev->resource[0];
39 info->irq = pdev->irq;
40
41 /* Probably it is enough to set this for iDMA capable devices only */
42 pci_set_master(pdev);
43
44 ret = intel_lpss_probe(&pdev->dev, info);
45 if (ret)
46 return ret;
47
48 pm_runtime_put(&pdev->dev);
49 pm_runtime_allow(&pdev->dev);
50
51 return 0;
52}
53
54static void intel_lpss_pci_remove(struct pci_dev *pdev)
55{
56 pm_runtime_forbid(&pdev->dev);
57 pm_runtime_get_sync(&pdev->dev);
58
59 intel_lpss_remove(&pdev->dev);
60}
61
62static INTEL_LPSS_PM_OPS(intel_lpss_pci_pm_ops);
63
64static const struct intel_lpss_platform_info spt_info = {
65 .clk_rate = 120000000,
66};
67
68static const struct intel_lpss_platform_info spt_uart_info = {
69 .clk_rate = 120000000,
70 .clk_con_id = "baudclk",
71};
72
73static const struct pci_device_id intel_lpss_pci_ids[] = {
74 /* SPT-LP */
75 { PCI_VDEVICE(INTEL, 0x9d27), (kernel_ulong_t)&spt_uart_info },
76 { PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
77 { PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
78 { PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
79 { PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_info },
80 { PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_info },
81 { PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_info },
82 { PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_info },
83 { PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_info },
84 { PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_info },
85 { PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
86 /* SPT-H */
87 { PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
88 { PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
89 { PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
90 { PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
91 { PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_info },
92 { PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_info },
93 { PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
94 { }
95};
96MODULE_DEVICE_TABLE(pci, intel_lpss_pci_ids);
97
98static struct pci_driver intel_lpss_pci_driver = {
99 .name = "intel-lpss",
100 .id_table = intel_lpss_pci_ids,
101 .probe = intel_lpss_pci_probe,
102 .remove = intel_lpss_pci_remove,
103 .driver = {
104 .pm = &intel_lpss_pci_pm_ops,
105 },
106};
107
108module_pci_driver(intel_lpss_pci_driver);
109
110MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
111MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
112MODULE_DESCRIPTION("Intel LPSS PCI driver");
113MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
new file mode 100644
index 000000000000..fdf4d5c1add2
--- /dev/null
+++ b/drivers/mfd/intel-lpss.c
@@ -0,0 +1,524 @@
1/*
2 * Intel Sunrisepoint LPSS core support.
3 *
4 * Copyright (C) 2015, Intel Corporation
5 *
6 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 * Heikki Krogerus <heikki.krogerus@linux.intel.com>
9 * Jarkko Nikula <jarkko.nikula@linux.intel.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16#include <linux/clk.h>
17#include <linux/clkdev.h>
18#include <linux/clk-provider.h>
19#include <linux/debugfs.h>
20#include <linux/idr.h>
21#include <linux/ioport.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/mfd/core.h>
25#include <linux/pm_qos.h>
26#include <linux/pm_runtime.h>
27#include <linux/seq_file.h>
28
29#include "intel-lpss.h"
30
31#define LPSS_DEV_OFFSET 0x000
32#define LPSS_DEV_SIZE 0x200
33#define LPSS_PRIV_OFFSET 0x200
34#define LPSS_PRIV_SIZE 0x100
35#define LPSS_IDMA64_OFFSET 0x800
36#define LPSS_IDMA64_SIZE 0x800
37
38/* Offsets from lpss->priv */
39#define LPSS_PRIV_RESETS 0x04
40#define LPSS_PRIV_RESETS_FUNC BIT(2)
41#define LPSS_PRIV_RESETS_IDMA 0x3
42
43#define LPSS_PRIV_ACTIVELTR 0x10
44#define LPSS_PRIV_IDLELTR 0x14
45
46#define LPSS_PRIV_LTR_REQ BIT(15)
47#define LPSS_PRIV_LTR_SCALE_MASK 0xc00
48#define LPSS_PRIV_LTR_SCALE_1US 0x800
49#define LPSS_PRIV_LTR_SCALE_32US 0xc00
50#define LPSS_PRIV_LTR_VALUE_MASK 0x3ff
51
52#define LPSS_PRIV_SSP_REG 0x20
53#define LPSS_PRIV_SSP_REG_DIS_DMA_FIN BIT(0)
54
55#define LPSS_PRIV_REMAP_ADDR_LO 0x40
56#define LPSS_PRIV_REMAP_ADDR_HI 0x44
57
58#define LPSS_PRIV_CAPS 0xfc
59#define LPSS_PRIV_CAPS_NO_IDMA BIT(8)
60#define LPSS_PRIV_CAPS_TYPE_SHIFT 4
61#define LPSS_PRIV_CAPS_TYPE_MASK (0xf << LPSS_PRIV_CAPS_TYPE_SHIFT)
62
63/* This matches the type field in CAPS register */
64enum intel_lpss_dev_type {
65 LPSS_DEV_I2C = 0,
66 LPSS_DEV_UART,
67 LPSS_DEV_SPI,
68};
69
70struct intel_lpss {
71 const struct intel_lpss_platform_info *info;
72 enum intel_lpss_dev_type type;
73 struct clk *clk;
74 struct clk_lookup *clock;
75 const struct mfd_cell *cell;
76 struct device *dev;
77 void __iomem *priv;
78 int devid;
79 u32 caps;
80 u32 active_ltr;
81 u32 idle_ltr;
82 struct dentry *debugfs;
83};
84
85static const struct resource intel_lpss_dev_resources[] = {
86 DEFINE_RES_MEM_NAMED(LPSS_DEV_OFFSET, LPSS_DEV_SIZE, "lpss_dev"),
87 DEFINE_RES_MEM_NAMED(LPSS_PRIV_OFFSET, LPSS_PRIV_SIZE, "lpss_priv"),
88 DEFINE_RES_IRQ(0),
89};
90
91static const struct resource intel_lpss_idma64_resources[] = {
92 DEFINE_RES_MEM(LPSS_IDMA64_OFFSET, LPSS_IDMA64_SIZE),
93 DEFINE_RES_IRQ(0),
94};
95
96#define LPSS_IDMA64_DRIVER_NAME "idma64"
97
98/*
99 * Cells needs to be ordered so that the iDMA is created first. This is
100 * because we need to be sure the DMA is available when the host controller
101 * driver is probed.
102 */
103static const struct mfd_cell intel_lpss_idma64_cell = {
104 .name = LPSS_IDMA64_DRIVER_NAME,
105 .num_resources = ARRAY_SIZE(intel_lpss_idma64_resources),
106 .resources = intel_lpss_idma64_resources,
107};
108
109static const struct mfd_cell intel_lpss_i2c_cell = {
110 .name = "i2c_designware",
111 .num_resources = ARRAY_SIZE(intel_lpss_dev_resources),
112 .resources = intel_lpss_dev_resources,
113};
114
115static const struct mfd_cell intel_lpss_uart_cell = {
116 .name = "dw-apb-uart",
117 .num_resources = ARRAY_SIZE(intel_lpss_dev_resources),
118 .resources = intel_lpss_dev_resources,
119};
120
121static const struct mfd_cell intel_lpss_spi_cell = {
122 .name = "pxa2xx-spi",
123 .num_resources = ARRAY_SIZE(intel_lpss_dev_resources),
124 .resources = intel_lpss_dev_resources,
125};
126
127static DEFINE_IDA(intel_lpss_devid_ida);
128static struct dentry *intel_lpss_debugfs;
129
130static int intel_lpss_request_dma_module(const char *name)
131{
132 static bool intel_lpss_dma_requested;
133
134 if (intel_lpss_dma_requested)
135 return 0;
136
137 intel_lpss_dma_requested = true;
138 return request_module("%s", name);
139}
140
141static void intel_lpss_cache_ltr(struct intel_lpss *lpss)
142{
143 lpss->active_ltr = readl(lpss->priv + LPSS_PRIV_ACTIVELTR);
144 lpss->idle_ltr = readl(lpss->priv + LPSS_PRIV_IDLELTR);
145}
146
147static int intel_lpss_debugfs_add(struct intel_lpss *lpss)
148{
149 struct dentry *dir;
150
151 dir = debugfs_create_dir(dev_name(lpss->dev), intel_lpss_debugfs);
152 if (IS_ERR(dir))
153 return PTR_ERR(dir);
154
155 /* Cache the values into lpss structure */
156 intel_lpss_cache_ltr(lpss);
157
158 debugfs_create_x32("capabilities", S_IRUGO, dir, &lpss->caps);
159 debugfs_create_x32("active_ltr", S_IRUGO, dir, &lpss->active_ltr);
160 debugfs_create_x32("idle_ltr", S_IRUGO, dir, &lpss->idle_ltr);
161
162 lpss->debugfs = dir;
163 return 0;
164}
165
166static void intel_lpss_debugfs_remove(struct intel_lpss *lpss)
167{
168 debugfs_remove_recursive(lpss->debugfs);
169}
170
171static void intel_lpss_ltr_set(struct device *dev, s32 val)
172{
173 struct intel_lpss *lpss = dev_get_drvdata(dev);
174 u32 ltr;
175
176 /*
177 * Program latency tolerance (LTR) accordingly what has been asked
178 * by the PM QoS layer or disable it in case we were passed
179 * negative value or PM_QOS_LATENCY_ANY.
180 */
181 ltr = readl(lpss->priv + LPSS_PRIV_ACTIVELTR);
182
183 if (val == PM_QOS_LATENCY_ANY || val < 0) {
184 ltr &= ~LPSS_PRIV_LTR_REQ;
185 } else {
186 ltr |= LPSS_PRIV_LTR_REQ;
187 ltr &= ~LPSS_PRIV_LTR_SCALE_MASK;
188 ltr &= ~LPSS_PRIV_LTR_VALUE_MASK;
189
190 if (val > LPSS_PRIV_LTR_VALUE_MASK)
191 ltr |= LPSS_PRIV_LTR_SCALE_32US | val >> 5;
192 else
193 ltr |= LPSS_PRIV_LTR_SCALE_1US | val;
194 }
195
196 if (ltr == lpss->active_ltr)
197 return;
198
199 writel(ltr, lpss->priv + LPSS_PRIV_ACTIVELTR);
200 writel(ltr, lpss->priv + LPSS_PRIV_IDLELTR);
201
202 /* Cache the values into lpss structure */
203 intel_lpss_cache_ltr(lpss);
204}
205
206static void intel_lpss_ltr_expose(struct intel_lpss *lpss)
207{
208 lpss->dev->power.set_latency_tolerance = intel_lpss_ltr_set;
209 dev_pm_qos_expose_latency_tolerance(lpss->dev);
210}
211
212static void intel_lpss_ltr_hide(struct intel_lpss *lpss)
213{
214 dev_pm_qos_hide_latency_tolerance(lpss->dev);
215 lpss->dev->power.set_latency_tolerance = NULL;
216}
217
218static int intel_lpss_assign_devs(struct intel_lpss *lpss)
219{
220 unsigned int type;
221
222 type = lpss->caps & LPSS_PRIV_CAPS_TYPE_MASK;
223 type >>= LPSS_PRIV_CAPS_TYPE_SHIFT;
224
225 switch (type) {
226 case LPSS_DEV_I2C:
227 lpss->cell = &intel_lpss_i2c_cell;
228 break;
229 case LPSS_DEV_UART:
230 lpss->cell = &intel_lpss_uart_cell;
231 break;
232 case LPSS_DEV_SPI:
233 lpss->cell = &intel_lpss_spi_cell;
234 break;
235 default:
236 return -ENODEV;
237 }
238
239 lpss->type = type;
240
241 return 0;
242}
243
244static bool intel_lpss_has_idma(const struct intel_lpss *lpss)
245{
246 return (lpss->caps & LPSS_PRIV_CAPS_NO_IDMA) == 0;
247}
248
249static void intel_lpss_set_remap_addr(const struct intel_lpss *lpss)
250{
251 resource_size_t addr = lpss->info->mem->start;
252
253 writel(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR_LO);
254#if BITS_PER_LONG > 32
255 writel(addr >> 32, lpss->priv + LPSS_PRIV_REMAP_ADDR_HI);
256#else
257 writel(0, lpss->priv + LPSS_PRIV_REMAP_ADDR_HI);
258#endif
259}
260
261static void intel_lpss_deassert_reset(const struct intel_lpss *lpss)
262{
263 u32 value = LPSS_PRIV_RESETS_FUNC | LPSS_PRIV_RESETS_IDMA;
264
265 /* Bring out the device from reset */
266 writel(value, lpss->priv + LPSS_PRIV_RESETS);
267}
268
269static void intel_lpss_init_dev(const struct intel_lpss *lpss)
270{
271 u32 value = LPSS_PRIV_SSP_REG_DIS_DMA_FIN;
272
273 intel_lpss_deassert_reset(lpss);
274
275 if (!intel_lpss_has_idma(lpss))
276 return;
277
278 intel_lpss_set_remap_addr(lpss);
279
280 /* Make sure that SPI multiblock DMA transfers are re-enabled */
281 if (lpss->type == LPSS_DEV_SPI)
282 writel(value, lpss->priv + LPSS_PRIV_SSP_REG);
283}
284
285static void intel_lpss_unregister_clock_tree(struct clk *clk)
286{
287 struct clk *parent;
288
289 while (clk) {
290 parent = clk_get_parent(clk);
291 clk_unregister(clk);
292 clk = parent;
293 }
294}
295
296static int intel_lpss_register_clock_divider(struct intel_lpss *lpss,
297 const char *devname,
298 struct clk **clk)
299{
300 char name[32];
301 struct clk *tmp = *clk;
302
303 snprintf(name, sizeof(name), "%s-enable", devname);
304 tmp = clk_register_gate(NULL, name, __clk_get_name(tmp), 0,
305 lpss->priv, 0, 0, NULL);
306 if (IS_ERR(tmp))
307 return PTR_ERR(tmp);
308
309 snprintf(name, sizeof(name), "%s-div", devname);
310 tmp = clk_register_fractional_divider(NULL, name, __clk_get_name(tmp),
311 0, lpss->priv, 1, 15, 16, 15, 0,
312 NULL);
313 if (IS_ERR(tmp))
314 return PTR_ERR(tmp);
315 *clk = tmp;
316
317 snprintf(name, sizeof(name), "%s-update", devname);
318 tmp = clk_register_gate(NULL, name, __clk_get_name(tmp),
319 CLK_SET_RATE_PARENT, lpss->priv, 31, 0, NULL);
320 if (IS_ERR(tmp))
321 return PTR_ERR(tmp);
322 *clk = tmp;
323
324 return 0;
325}
326
327static int intel_lpss_register_clock(struct intel_lpss *lpss)
328{
329 const struct mfd_cell *cell = lpss->cell;
330 struct clk *clk;
331 char devname[24];
332 int ret;
333
334 if (!lpss->info->clk_rate)
335 return 0;
336
337 /* Root clock */
338 clk = clk_register_fixed_rate(NULL, dev_name(lpss->dev), NULL,
339 CLK_IS_ROOT, lpss->info->clk_rate);
340 if (IS_ERR(clk))
341 return PTR_ERR(clk);
342
343 snprintf(devname, sizeof(devname), "%s.%d", cell->name, lpss->devid);
344
345 /*
346 * Support for clock divider only if it has some preset value.
347 * Otherwise we assume that the divider is not used.
348 */
349 if (lpss->type != LPSS_DEV_I2C) {
350 ret = intel_lpss_register_clock_divider(lpss, devname, &clk);
351 if (ret)
352 goto err_clk_register;
353 }
354
355 ret = -ENOMEM;
356
357 /* Clock for the host controller */
358 lpss->clock = clkdev_create(clk, lpss->info->clk_con_id, "%s", devname);
359 if (!lpss->clock)
360 goto err_clk_register;
361
362 lpss->clk = clk;
363
364 return 0;
365
366err_clk_register:
367 intel_lpss_unregister_clock_tree(clk);
368
369 return ret;
370}
371
372static void intel_lpss_unregister_clock(struct intel_lpss *lpss)
373{
374 if (IS_ERR_OR_NULL(lpss->clk))
375 return;
376
377 clkdev_drop(lpss->clock);
378 intel_lpss_unregister_clock_tree(lpss->clk);
379}
380
381int intel_lpss_probe(struct device *dev,
382 const struct intel_lpss_platform_info *info)
383{
384 struct intel_lpss *lpss;
385 int ret;
386
387 if (!info || !info->mem || info->irq <= 0)
388 return -EINVAL;
389
390 lpss = devm_kzalloc(dev, sizeof(*lpss), GFP_KERNEL);
391 if (!lpss)
392 return -ENOMEM;
393
394 lpss->priv = devm_ioremap(dev, info->mem->start + LPSS_PRIV_OFFSET,
395 LPSS_PRIV_SIZE);
396 if (!lpss->priv)
397 return -ENOMEM;
398
399 lpss->info = info;
400 lpss->dev = dev;
401 lpss->caps = readl(lpss->priv + LPSS_PRIV_CAPS);
402
403 dev_set_drvdata(dev, lpss);
404
405 ret = intel_lpss_assign_devs(lpss);
406 if (ret)
407 return ret;
408
409 intel_lpss_init_dev(lpss);
410
411 lpss->devid = ida_simple_get(&intel_lpss_devid_ida, 0, 0, GFP_KERNEL);
412 if (lpss->devid < 0)
413 return lpss->devid;
414
415 ret = intel_lpss_register_clock(lpss);
416 if (ret)
417 goto err_clk_register;
418
419 intel_lpss_ltr_expose(lpss);
420
421 ret = intel_lpss_debugfs_add(lpss);
422 if (ret)
423 dev_warn(dev, "Failed to create debugfs entries\n");
424
425 if (intel_lpss_has_idma(lpss)) {
426 /*
427 * Ensure the DMA driver is loaded before the host
428 * controller device appears, so that the host controller
429 * driver can request its DMA channels as early as
430 * possible.
431 *
432 * If the DMA module is not there that's OK as well.
433 */
434 intel_lpss_request_dma_module(LPSS_IDMA64_DRIVER_NAME);
435
436 ret = mfd_add_devices(dev, lpss->devid, &intel_lpss_idma64_cell,
437 1, info->mem, info->irq, NULL);
438 if (ret)
439 dev_warn(dev, "Failed to add %s, fallback to PIO\n",
440 LPSS_IDMA64_DRIVER_NAME);
441 }
442
443 ret = mfd_add_devices(dev, lpss->devid, lpss->cell,
444 1, info->mem, info->irq, NULL);
445 if (ret)
446 goto err_remove_ltr;
447
448 return 0;
449
450err_remove_ltr:
451 intel_lpss_debugfs_remove(lpss);
452 intel_lpss_ltr_hide(lpss);
453
454err_clk_register:
455 ida_simple_remove(&intel_lpss_devid_ida, lpss->devid);
456
457 return ret;
458}
459EXPORT_SYMBOL_GPL(intel_lpss_probe);
460
461void intel_lpss_remove(struct device *dev)
462{
463 struct intel_lpss *lpss = dev_get_drvdata(dev);
464
465 mfd_remove_devices(dev);
466 intel_lpss_debugfs_remove(lpss);
467 intel_lpss_ltr_hide(lpss);
468 intel_lpss_unregister_clock(lpss);
469 ida_simple_remove(&intel_lpss_devid_ida, lpss->devid);
470}
471EXPORT_SYMBOL_GPL(intel_lpss_remove);
472
473static int resume_lpss_device(struct device *dev, void *data)
474{
475 pm_runtime_resume(dev);
476 return 0;
477}
478
479int intel_lpss_prepare(struct device *dev)
480{
481 /*
482 * Resume both child devices before entering system sleep. This
483 * ensures that they are in proper state before they get suspended.
484 */
485 device_for_each_child_reverse(dev, NULL, resume_lpss_device);
486 return 0;
487}
488EXPORT_SYMBOL_GPL(intel_lpss_prepare);
489
490int intel_lpss_suspend(struct device *dev)
491{
492 return 0;
493}
494EXPORT_SYMBOL_GPL(intel_lpss_suspend);
495
496int intel_lpss_resume(struct device *dev)
497{
498 struct intel_lpss *lpss = dev_get_drvdata(dev);
499
500 intel_lpss_init_dev(lpss);
501
502 return 0;
503}
504EXPORT_SYMBOL_GPL(intel_lpss_resume);
505
506static int __init intel_lpss_init(void)
507{
508 intel_lpss_debugfs = debugfs_create_dir("intel_lpss", NULL);
509 return 0;
510}
511module_init(intel_lpss_init);
512
513static void __exit intel_lpss_exit(void)
514{
515 debugfs_remove(intel_lpss_debugfs);
516}
517module_exit(intel_lpss_exit);
518
519MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
520MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
521MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
522MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@linux.intel.com>");
523MODULE_DESCRIPTION("Intel LPSS core driver");
524MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/intel-lpss.h b/drivers/mfd/intel-lpss.h
new file mode 100644
index 000000000000..f28cb28a62f8
--- /dev/null
+++ b/drivers/mfd/intel-lpss.h
@@ -0,0 +1,62 @@
1/*
2 * Intel LPSS core support.
3 *
4 * Copyright (C) 2015, Intel Corporation
5 *
6 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#ifndef __MFD_INTEL_LPSS_H
15#define __MFD_INTEL_LPSS_H
16
17struct device;
18struct resource;
19
20struct intel_lpss_platform_info {
21 struct resource *mem;
22 int irq;
23 unsigned long clk_rate;
24 const char *clk_con_id;
25};
26
27int intel_lpss_probe(struct device *dev,
28 const struct intel_lpss_platform_info *info);
29void intel_lpss_remove(struct device *dev);
30
31#ifdef CONFIG_PM
32int intel_lpss_prepare(struct device *dev);
33int intel_lpss_suspend(struct device *dev);
34int intel_lpss_resume(struct device *dev);
35
36#ifdef CONFIG_PM_SLEEP
37#define INTEL_LPSS_SLEEP_PM_OPS \
38 .prepare = intel_lpss_prepare, \
39 .suspend = intel_lpss_suspend, \
40 .resume = intel_lpss_resume, \
41 .freeze = intel_lpss_suspend, \
42 .thaw = intel_lpss_resume, \
43 .poweroff = intel_lpss_suspend, \
44 .restore = intel_lpss_resume,
45#endif
46
47#define INTEL_LPSS_RUNTIME_PM_OPS \
48 .runtime_suspend = intel_lpss_suspend, \
49 .runtime_resume = intel_lpss_resume,
50
51#else /* !CONFIG_PM */
52#define INTEL_LPSS_SLEEP_PM_OPS
53#define INTEL_LPSS_RUNTIME_PM_OPS
54#endif /* CONFIG_PM */
55
56#define INTEL_LPSS_PM_OPS(name) \
57const struct dev_pm_ops name = { \
58 INTEL_LPSS_SLEEP_PM_OPS \
59 INTEL_LPSS_RUNTIME_PM_OPS \
60}
61
62#endif /* __MFD_INTEL_LPSS_H */
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 14fd5cbcf0f2..c17635d3e504 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -302,7 +302,7 @@ void mfd_remove_devices(struct device *parent)
302{ 302{
303 atomic_t *cnts = NULL; 303 atomic_t *cnts = NULL;
304 304
305 device_for_each_child(parent, &cnts, mfd_remove_devices_fn); 305 device_for_each_child_reverse(parent, &cnts, mfd_remove_devices_fn);
306 kfree(cnts); 306 kfree(cnts);
307} 307}
308EXPORT_SYMBOL(mfd_remove_devices); 308EXPORT_SYMBOL(mfd_remove_devices);
diff --git a/include/linux/device.h b/include/linux/device.h
index a2b4ea70a946..9d212fee4158 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -959,6 +959,8 @@ extern int __must_check device_add(struct device *dev);
959extern void device_del(struct device *dev); 959extern void device_del(struct device *dev);
960extern int device_for_each_child(struct device *dev, void *data, 960extern int device_for_each_child(struct device *dev, void *data,
961 int (*fn)(struct device *dev, void *data)); 961 int (*fn)(struct device *dev, void *data));
962extern int device_for_each_child_reverse(struct device *dev, void *data,
963 int (*fn)(struct device *dev, void *data));
962extern struct device *device_find_child(struct device *dev, void *data, 964extern struct device *device_find_child(struct device *dev, void *data,
963 int (*match)(struct device *dev, void *data)); 965 int (*match)(struct device *dev, void *data));
964extern int device_rename(struct device *dev, const char *new_name); 966extern int device_rename(struct device *dev, const char *new_name);
diff --git a/include/linux/klist.h b/include/linux/klist.h
index 61e5b723ae73..953f283f8451 100644
--- a/include/linux/klist.h
+++ b/include/linux/klist.h
@@ -63,6 +63,7 @@ extern void klist_iter_init(struct klist *k, struct klist_iter *i);
63extern void klist_iter_init_node(struct klist *k, struct klist_iter *i, 63extern void klist_iter_init_node(struct klist *k, struct klist_iter *i,
64 struct klist_node *n); 64 struct klist_node *n);
65extern void klist_iter_exit(struct klist_iter *i); 65extern void klist_iter_exit(struct klist_iter *i);
66extern struct klist_node *klist_prev(struct klist_iter *i);
66extern struct klist_node *klist_next(struct klist_iter *i); 67extern struct klist_node *klist_next(struct klist_iter *i);
67 68
68#endif 69#endif
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 7b3ae0cffc05..0f65d36c2a75 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -161,6 +161,8 @@ void dev_pm_qos_hide_flags(struct device *dev);
161int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set); 161int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
162s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev); 162s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
163int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val); 163int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
164int dev_pm_qos_expose_latency_tolerance(struct device *dev);
165void dev_pm_qos_hide_latency_tolerance(struct device *dev);
164 166
165static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) 167static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
166{ 168{
@@ -229,6 +231,9 @@ static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
229 { return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; } 231 { return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
230static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val) 232static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
231 { return 0; } 233 { return 0; }
234static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev)
235 { return 0; }
236static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {}
232 237
233static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; } 238static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; }
234static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; } 239static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
diff --git a/lib/klist.c b/lib/klist.c
index 89b485a2a58d..d74cf7a29afd 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -324,6 +324,47 @@ static struct klist_node *to_klist_node(struct list_head *n)
324} 324}
325 325
326/** 326/**
327 * klist_prev - Ante up prev node in list.
328 * @i: Iterator structure.
329 *
330 * First grab list lock. Decrement the reference count of the previous
331 * node, if there was one. Grab the prev node, increment its reference
332 * count, drop the lock, and return that prev node.
333 */
334struct klist_node *klist_prev(struct klist_iter *i)
335{
336 void (*put)(struct klist_node *) = i->i_klist->put;
337 struct klist_node *last = i->i_cur;
338 struct klist_node *prev;
339
340 spin_lock(&i->i_klist->k_lock);
341
342 if (last) {
343 prev = to_klist_node(last->n_node.prev);
344 if (!klist_dec_and_del(last))
345 put = NULL;
346 } else
347 prev = to_klist_node(i->i_klist->k_list.prev);
348
349 i->i_cur = NULL;
350 while (prev != to_klist_node(&i->i_klist->k_list)) {
351 if (likely(!knode_dead(prev))) {
352 kref_get(&prev->n_ref);
353 i->i_cur = prev;
354 break;
355 }
356 prev = to_klist_node(prev->n_node.prev);
357 }
358
359 spin_unlock(&i->i_klist->k_lock);
360
361 if (put && last)
362 put(last);
363 return i->i_cur;
364}
365EXPORT_SYMBOL_GPL(klist_prev);
366
367/**
327 * klist_next - Ante up next node in list. 368 * klist_next - Ante up next node in list.
328 * @i: Iterator structure. 369 * @i: Iterator structure.
329 * 370 *
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-23 21:06:37 -0500