[mirror_ubuntu-bionic-kernel.git] / drivers / staging / greybus / audio_manager_sysfs.c

/*
 * Greybus operations
 *
 * Copyright 2015-2016 Google Inc.
 *
 * Released under the GPLv2 only.
 */

#include <linux/string.h>
#include <linux/sysfs.h>

#include "audio_manager.h"
#include "audio_manager_private.h"

static ssize_t manager_sysfs_add_store(
	struct kobject *kobj, struct kobj_attribute *attr,
	const char *buf, size_t count)
{
	struct gb_audio_manager_module_descriptor desc = { {0} };

	int num = sscanf(buf,
			"name=%" GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF "s "
			"vid=%d pid=%d intf_id=%d i/p devices=0x%X o/p devices=0x%X",
			desc.name, &desc.vid, &desc.pid, &desc.intf_id,
			&desc.ip_devices, &desc.op_devices);

	if (num != 7)
		return -EINVAL;

	num = gb_audio_manager_add(&desc);
	if (num < 0)
		return -EINVAL;

	return count;
}

static struct kobj_attribute manager_add_attribute =
	__ATTR(add, 0664, NULL, manager_sysfs_add_store);

static ssize_t manager_sysfs_remove_store(
	struct kobject *kobj, struct kobj_attribute *attr,
	const char *buf, size_t count)
{
	int id;

	int num = kstrtoint(buf, 10, &id);

	if (num != 1)
		return -EINVAL;

	num = gb_audio_manager_remove(id);
	if (num)
		return num;

	return count;
}

static struct kobj_attribute manager_remove_attribute =
	__ATTR(remove, 0664, NULL, manager_sysfs_remove_store);

static ssize_t manager_sysfs_dump_store(
	struct kobject *kobj, struct kobj_attribute *attr,
	const char *buf, size_t count)
{
	int id;

	int num = kstrtoint(buf, 10, &id);

	if (num == 1) {
		num = gb_audio_manager_dump_module(id);
		if (num)
			return num;
	} else if (!strncmp("all", buf, 3)) {
		gb_audio_manager_dump_all();
	} else {
		return -EINVAL;
	}

	return count;
}

static struct kobj_attribute manager_dump_attribute =
	__ATTR(dump, 0664, NULL, manager_sysfs_dump_store);

static void manager_sysfs_init_attribute(
		struct kobject *kobj, struct kobj_attribute *kattr)
{
	int err;

	err = sysfs_create_file(kobj, &kattr->attr);
	if (err) {
		pr_warn("creating the sysfs entry for %s failed: %d\n",
			kattr->attr.name, err);
	}
}

void gb_audio_manager_sysfs_init(struct kobject *kobj)
{
	manager_sysfs_init_attribute(kobj, &manager_add_attribute);
	manager_sysfs_init_attribute(kobj, &manager_remove_attribute);
	manager_sysfs_init_attribute(kobj, &manager_dump_attribute);
}
Commit	Line	Data
8db00736 SA	1	/*
	2	* Greybus operations
	3	*
	4	* Copyright 2015-2016 Google Inc.
	5	*
	6	* Released under the GPLv2 only.
	7	*/
	8
	9	#include <linux/string.h>
	10	#include <linux/sysfs.h>
	11
	12	#include "audio_manager.h"
	13	#include "audio_manager_private.h"
	14
	15	static ssize_t manager_sysfs_add_store(
	16	struct kobject kobj, struct kobj_attribute attr,
	17	const char *buf, size_t count)
	18	{
	19	struct gb_audio_manager_module_descriptor desc = { {0} };
	20
	21	int num = sscanf(buf,
	22	"name=%" GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF "s "
49b9137a PB	23	"vid=%d pid=%d intf_id=%d i/p devices=0x%X o/p devices=0x%X",
	24	desc.name, &desc.vid, &desc.pid, &desc.intf_id,
	25	&desc.ip_devices, &desc.op_devices);
8db00736	26
a9234bfd	27	if (num != 7)
8db00736 SA	28	return -EINVAL;
	29
	30	num = gb_audio_manager_add(&desc);
	31	if (num < 0)
	32	return -EINVAL;
	33
	34	return count;
	35	}
	36
	37	static struct kobj_attribute manager_add_attribute =
	38	__ATTR(add, 0664, NULL, manager_sysfs_add_store);
	39
	40	static ssize_t manager_sysfs_remove_store(
	41	struct kobject kobj, struct kobj_attribute attr,
	42	const char *buf, size_t count)
	43	{
	44	int id;
	45
f9a21a3f	46	int num = kstrtoint(buf, 10, &id);
8db00736 SA	47
	48	if (num != 1)
	49	return -EINVAL;
	50
	51	num = gb_audio_manager_remove(id);
	52	if (num)
	53	return num;
	54
	55	return count;
	56	}
	57
	58	static struct kobj_attribute manager_remove_attribute =
	59	__ATTR(remove, 0664, NULL, manager_sysfs_remove_store);
	60
	61	static ssize_t manager_sysfs_dump_store(
	62	struct kobject kobj, struct kobj_attribute attr,
	63	const char *buf, size_t count)
	64	{
	65	int id;
	66
f9a21a3f	67	int num = kstrtoint(buf, 10, &id);
8db00736 SA	68
	69	if (num == 1) {
	70	num = gb_audio_manager_dump_module(id);
	71	if (num)
	72	return num;
2072763c	73	} else if (!strncmp("all", buf, 3)) {
8db00736	74	gb_audio_manager_dump_all();
2072763c	75	} else {
8db00736	76	return -EINVAL;
2072763c	77	}
8db00736 SA	78
	79	return count;
	80	}
	81
	82	static struct kobj_attribute manager_dump_attribute =
	83	__ATTR(dump, 0664, NULL, manager_sysfs_dump_store);
	84
	85	static void manager_sysfs_init_attribute(
	86	struct kobject kobj, struct kobj_attribute kattr)
	87	{
	88	int err;
	89
	90	err = sysfs_create_file(kobj, &kattr->attr);
	91	if (err) {
	92	pr_warn("creating the sysfs entry for %s failed: %d\n",
	93	kattr->attr.name, err);
	94	}
	95	}
	96
	97	void gb_audio_manager_sysfs_init(struct kobject *kobj)
	98	{
	99	manager_sysfs_init_attribute(kobj, &manager_add_attribute);
	100	manager_sysfs_init_attribute(kobj, &manager_remove_attribute);
	101	manager_sysfs_init_attribute(kobj, &manager_dump_attribute);
	102	}