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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora Forum nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* Alternatively, provided that this notice is retained in full, this software
* may be relicensed by the recipient under the terms of the GNU General Public
* License version 2 ("GPL") and only version 2, in which case the provisions of
* the GPL apply INSTEAD OF those given above. If the recipient relicenses the
* software under the GPL, then the identification text in the MODULE_LICENSE
* macro must be changed to reflect "GPLv2" instead of "Dual BSD/GPL". Once a
* recipient changes the license terms to the GPL, subsequent recipients shall
* not relicense under alternate licensing terms, including the BSD or dual
* BSD/GPL terms. In addition, the following license statement immediately
* below and between the words START and END shall also then apply when this
* software is relicensed under the GPL:
*
* START
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* END
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* MSM architecture driver to reset the modem
*/
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include "smd_private.h"
#include "proc_comm.h"
#define DEBUG
/* #undef DEBUG */
#ifdef DEBUG
#define D(x...) printk(x)
#else
#define D(x...) do {} while (0)
#endif
static ssize_t reset_modem_read(struct file *fp, char __user *buf,
size_t count, loff_t *pos)
{
return 0;
}
static ssize_t reset_modem_write(struct file *fp, const char __user *buf,
size_t count, loff_t *pos)
{
unsigned char cmd[64];
int len;
int time;
int zero = 0;
int r;
if (count < 1)
return 0;
len = count > 63 ? 63 : count;
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = 0;
/* lazy */
if (cmd[len-1] == '\n') {
cmd[len-1] = 0;
len--;
}
if (!strncmp(cmd, "wait", 4)) {
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: WAIT\n",
__FILE__,
__LINE__,
__func__);
smsm_reset_modem(SMSM_MODEM_WAIT);
} else if (!strncmp(cmd, "continue", 8)) {
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: CONTINUE\n",
__FILE__,
__LINE__,
__func__);
smsm_reset_modem_cont();
} else if (!strncmp(cmd, "download", 8)) {
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: DOWNLOAD\n",
__FILE__,
__LINE__,
__func__);
smsm_reset_modem(SMSM_SYSTEM_DOWNLOAD);
} else if (sscanf(cmd, "deferred reset %i", &time) == 1) {
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: DEFERRED RESET %ims\n",
__FILE__,
__LINE__,
__func__,
time);
if (time == 0) {
r = 0;
msm_proc_comm_reset_modem_now();
} else {
r = msm_proc_comm(PCOM_RESET_MODEM, &time, &zero);
}
if (r < 0)
return r;
} else if (!strncmp(cmd, "deferred reset", 14)) {
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: DEFERRED RESET 0ms\n",
__FILE__,
__LINE__,
__func__);
r = 0;
msm_proc_comm_reset_modem_now();
if (r < 0)
return r;
} else if (!strncmp(cmd, "reset chip now", 14)) {
uint param1 = 0x0;
uint param2 = 0x0;
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: CHIP RESET IMMEDIATE\n",
__FILE__,
__LINE__,
__func__);
r = msm_proc_comm(PCOM_RESET_CHIP_IMM, ¶m1, ¶m2);
if (r < 0)
return r;
} else if (!strncmp(cmd, "reset chip", 10)) {
uint param1 = 0x0;
uint param2 = 0x0;
D(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: CHIP RESET \n",
__FILE__,
__LINE__,
__func__);
r = msm_proc_comm(PCOM_RESET_CHIP, ¶m1, ¶m2);
if (r < 0)
return r;
} else { /* if (!strncmp(cmd, "reset", 5)) */
printk(KERN_ERR "INFO:%s:%i:%s: "
"MODEM RESTART: RESET\n",
__FILE__,
__LINE__,
__func__);
smsm_reset_modem(SMSM_RESET);
}
return count;
}
static int reset_modem_open(struct inode *ip, struct file *fp)
{
return 0;
}
static int reset_modem_release(struct inode *ip, struct file *fp)
{
return 0;
}
static const struct file_operations reset_modem_fops = {
.owner = THIS_MODULE,
.read = reset_modem_read,
.write = reset_modem_write,
.open = reset_modem_open,
.release = reset_modem_release,
};
static struct miscdevice reset_modem_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "reset_modem",
.fops = &reset_modem_fops,
};
static int __init reset_modem_init(void)
{
return misc_register(&reset_modem_dev);
}
module_init(reset_modem_init);
MODULE_DESCRIPTION("Reset Modem");
MODULE_LICENSE("GPL v2");
|
