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
|
/* Copyright (c) 2009, Code Aurora Forum. 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.
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/hrtimer.h>
#include <linux/clk.h>
#include <mach/hardware.h>
#include <linux/io.h>
#include <linux/debugfs.h>
#include <asm/system.h>
#include <asm/mach-types.h>
#include <linux/semaphore.h>
#include <linux/uaccess.h>
#include "mdp.h"
#include "msm_fb.h"
#include "mdp4.h"
#define MDP4_DEBUG_BUF 128
static char mdp4_debug_buf[MDP4_DEBUG_BUF];
static ulong mdp4_debug_offset;
static ulong mdp4_base_addr;
static int mdp4_offset_set(void *data, u64 val)
{
mdp4_debug_offset = (int)val;
return 0;
}
static int mdp4_offset_get(void *data, u64 *val)
{
*val = (u64)mdp4_debug_offset;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(
mdp4_offset_fops,
mdp4_offset_get,
mdp4_offset_set,
"%llx\n");
static int mdp4_debugfs_open(struct inode *inode, struct file *file)
{
/* non-seekable */
file->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
return 0;
}
static int mdp4_debugfs_release(struct inode *inode, struct file *file)
{
return 0;
}
static ssize_t mdp4_debugfs_write(
struct file *file,
const char __user *buff,
size_t count,
loff_t *ppos)
{
int cnt;
unsigned int data;
printk(KERN_INFO "%s: offset=%d count=%d *ppos=%d\n",
__func__, (int)mdp4_debug_offset, (int)count, (int)*ppos);
if (count > sizeof(mdp4_debug_buf))
return -EFAULT;
if (copy_from_user(mdp4_debug_buf, buff, count))
return -EFAULT;
mdp4_debug_buf[count] = 0; /* end of string */
cnt = sscanf(mdp4_debug_buf, "%x", &data);
if (cnt < 1) {
printk(KERN_ERR "%s: sscanf failed cnt=%d" , __func__, cnt);
return -EINVAL;
}
writel(&data, mdp4_base_addr + mdp4_debug_offset);
return 0;
}
static ssize_t mdp4_debugfs_read(
struct file *file,
char __user *buff,
size_t count,
loff_t *ppos)
{
int len = 0;
unsigned int data;
printk(KERN_INFO "%s: offset=%d count=%d *ppos=%d\n",
__func__, (int)mdp4_debug_offset, (int)count, (int)*ppos);
if (*ppos)
return 0; /* the end */
data = readl(mdp4_base_addr + mdp4_debug_offset);
len = snprintf(mdp4_debug_buf, 4, "%x\n", data);
if (len > 0) {
if (len > count)
len = count;
if (copy_to_user(buff, mdp4_debug_buf, len))
return -EFAULT;
}
printk(KERN_INFO "%s: len=%d\n", __func__, len);
if (len < 0)
return 0;
*ppos += len; /* increase offset */
return len;
}
static const struct file_operations mdp4_debugfs_fops = {
.open = mdp4_debugfs_open,
.release = mdp4_debugfs_release,
.read = mdp4_debugfs_read,
.write = mdp4_debugfs_write,
};
int mdp4_debugfs_init(void)
{
struct dentry *dent = debugfs_create_dir("mdp4", NULL);
if (IS_ERR(dent)) {
printk(KERN_ERR "%s(%d): debugfs_create_dir fail, error %ld\n",
__FILE__, __LINE__, PTR_ERR(dent));
return -1;
}
if (debugfs_create_file("offset", 0644, dent, 0, &mdp4_offset_fops)
== NULL) {
printk(KERN_ERR "%s(%d): debugfs_create_file: offset fail\n",
__FILE__, __LINE__);
return -1;
}
if (debugfs_create_file("regs", 0644, dent, 0, &mdp4_debugfs_fops)
== NULL) {
printk(KERN_ERR "%s(%d): debugfs_create_file: regs fail\n",
__FILE__, __LINE__);
return -1;
}
mdp4_debug_offset = 0;
mdp4_base_addr = (ulong) msm_mdp_base; /* defined at msm_fb_def.h */
return 0;
}
|
