Merge "msm: RPM: Add debugfs support to send requests to RPM"

obj-$(CONFIG_MSM_RMT_STORAGE_CLIENT) += rmt_storage_client.o

obj-$(CONFIG_MSM_LPM_TEST) += test-lpm.o

obj-$(CONFIG_MSM_RPM_SMD) += rpm-smd.o lpm_levels.o

ifdef CONFIG_DEBUG_FS

obj-$(CONFIG_MSM_RPM_SMD) += rpm-smd-debug.o

endif

obj-$(CONFIG_MSM_MPM_OF) += mpm-of.o

obj-$(CONFIG_MSM_RPM_STATS_LOG) += rpm_stats.o rpm_master_stat.o

obj-$(CONFIG_MSM_RPM_RBCPR_STATS_V2_LOG) += rpm_rbcpr_stats_v2.o

/* Copyright (c) 2013, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#define pr_fmt(fmt) "rpm-smd-debug: %s(): " fmt, __func__

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/debugfs.h>

#include <linux/list.h>

#include <linux/io.h>

#include <linux/uaccess.h>

#include <linux/slab.h>

#include <mach/rpm-smd.h>

#define MAX_MSG_BUFFER 350

#define MAX_KEY_VALUE_PAIRS 20

static struct dentry *rpm_debugfs_dir;

static u32 string_to_uint(const u8 *str)

{

	int i, len;

	u32 output = 0;

	len = strnlen(str, sizeof(u32));

	for (i = 0; i < len; i++)

		output |= str[i] << (i * 8);

	return output;

}

static ssize_t rsc_ops_write(struct file *fp, const char __user *user_buffer,

						size_t count, loff_t *position)

{

	char buf[MAX_MSG_BUFFER], rsc_type_str[6] = {}, rpm_set[8] = {},

						key_str[6] = {};

	int i, pos, set = -1, nelems;

	char *cmp;

	uint32_t rsc_type, rsc_id, key, data;

	struct msm_rpm_request *req;

	count = min(count, sizeof(buf) - 1);

	if (copy_from_user(&buf, user_buffer, count))

		return -EFAULT;

	buf[count] = '\0';

	cmp = strstrip(buf);

	sscanf(cmp, "%7s %5s %u %d %n", rpm_set, rsc_type_str, &rsc_id,

							&nelems, &pos);

	if (strlen(rpm_set) > 6 || strlen(rsc_type_str) > 4) {

		pr_err("Invalid value of set or resource type\n");

		goto err;

	}

	if (!strcmp(rpm_set, "active"))

		set = 0;

	else if (!strcmp(rpm_set, "sleep"))

		set = 1;

	rsc_type = string_to_uint(rsc_type_str);

	if (set < 0 || nelems < 0) {

		pr_err("Invalid value of set or nelems\n");

		goto err;

	}

	if (nelems > MAX_KEY_VALUE_PAIRS) {

		pr_err("Exceeded max no of key-value entries\n");

		goto err;

	}

	req = msm_rpm_create_request(set, rsc_type, rsc_id, nelems);

	if (!req)

		return -ENOMEM;

	for (i = 0; i < nelems; i++) {

		cmp += pos;

		sscanf(cmp, "%5s %n", key_str, &pos);

		if (strlen(key_str) > 4) {

			pr_err("Key value cannot be more than 4 charecters");

			goto err;

		}

		key = string_to_uint(key_str);

		if (!key) {

			pr_err("Key values entered incorrectly\n");

			goto err;

		}

		cmp += pos;

		sscanf(cmp, "%u %n", &data, &pos);

		if (msm_rpm_add_kvp_data(req, key,

				(void *)&data, sizeof(data)))

			goto err_request;

	}

	if (msm_rpm_wait_for_ack(msm_rpm_send_request(req)))

		pr_err("Sending the RPM message failed\n");

	else

		pr_info("RPM message sent succesfully\n");

err_request:

	msm_rpm_free_request(req);

err:

	return count;

}

static const struct file_operations rsc_ops = {

	.write = rsc_ops_write,

};

static int __init rpm_smd_debugfs_init(void)

{

	rpm_debugfs_dir = debugfs_create_dir("rpm_send_msg", NULL);

	if (!rpm_debugfs_dir)

		return -ENOMEM;

	if (!debugfs_create_file("message", S_IWUSR, rpm_debugfs_dir, NULL,

								&rsc_ops))

		return -ENOMEM;

	return 0;

}

late_initcall(rpm_smd_debugfs_init);

static void __exit rpm_smd_debugfs_exit(void)

{

	debugfs_remove_recursive(rpm_debugfs_dir);

}

module_exit(rpm_smd_debugfs_exit);

MODULE_DESCRIPTION("RPM SMD Debug Driver");

MODULE_LICENSE("GPL");