1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/* Copyright (c) 2013-2014, 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 <soc/qcom/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");
|
