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9d200153 SM |
1 | /* Copyright (c) 2009, Code Aurora Forum. All rights reserved. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License version 2 and | |
5 | * only version 2 as published by the Free Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
15 | * 02110-1301, USA. | |
16 | */ | |
17 | #include <linux/module.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/time.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/hrtimer.h> | |
25 | #include <linux/clk.h> | |
26 | #include <mach/hardware.h> | |
27 | #include <linux/io.h> | |
28 | #include <linux/debugfs.h> | |
29 | ||
30 | #include <asm/system.h> | |
31 | #include <asm/mach-types.h> | |
32 | #include <linux/semaphore.h> | |
33 | #include <linux/uaccess.h> | |
34 | ||
35 | #include "mdp.h" | |
36 | #include "msm_fb.h" | |
37 | #include "mdp4.h" | |
38 | ||
39 | ||
40 | #define MDP4_DEBUG_BUF 128 | |
41 | ||
42 | ||
43 | static char mdp4_debug_buf[MDP4_DEBUG_BUF]; | |
44 | static ulong mdp4_debug_offset; | |
45 | static ulong mdp4_base_addr; | |
46 | ||
47 | static int mdp4_offset_set(void *data, u64 val) | |
48 | { | |
49 | mdp4_debug_offset = (int)val; | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static int mdp4_offset_get(void *data, u64 *val) | |
54 | { | |
55 | *val = (u64)mdp4_debug_offset; | |
56 | return 0; | |
57 | } | |
58 | ||
59 | DEFINE_SIMPLE_ATTRIBUTE( | |
60 | mdp4_offset_fops, | |
61 | mdp4_offset_get, | |
62 | mdp4_offset_set, | |
63 | "%llx\n"); | |
64 | ||
65 | ||
9d200153 SM |
66 | static int mdp4_debugfs_release(struct inode *inode, struct file *file) |
67 | { | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static ssize_t mdp4_debugfs_write( | |
72 | struct file *file, | |
73 | const char __user *buff, | |
74 | size_t count, | |
75 | loff_t *ppos) | |
76 | { | |
77 | int cnt; | |
78 | unsigned int data; | |
79 | ||
80 | printk(KERN_INFO "%s: offset=%d count=%d *ppos=%d\n", | |
81 | __func__, (int)mdp4_debug_offset, (int)count, (int)*ppos); | |
82 | ||
83 | if (count > sizeof(mdp4_debug_buf)) | |
84 | return -EFAULT; | |
85 | ||
86 | if (copy_from_user(mdp4_debug_buf, buff, count)) | |
87 | return -EFAULT; | |
88 | ||
89 | ||
90 | mdp4_debug_buf[count] = 0; /* end of string */ | |
91 | ||
92 | cnt = sscanf(mdp4_debug_buf, "%x", &data); | |
93 | if (cnt < 1) { | |
94 | printk(KERN_ERR "%s: sscanf failed cnt=%d" , __func__, cnt); | |
95 | return -EINVAL; | |
96 | } | |
97 | ||
98 | writel(&data, mdp4_base_addr + mdp4_debug_offset); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static ssize_t mdp4_debugfs_read( | |
104 | struct file *file, | |
105 | char __user *buff, | |
106 | size_t count, | |
107 | loff_t *ppos) | |
108 | { | |
109 | int len = 0; | |
110 | unsigned int data; | |
111 | ||
112 | printk(KERN_INFO "%s: offset=%d count=%d *ppos=%d\n", | |
113 | __func__, (int)mdp4_debug_offset, (int)count, (int)*ppos); | |
114 | ||
115 | if (*ppos) | |
116 | return 0; /* the end */ | |
117 | ||
118 | data = readl(mdp4_base_addr + mdp4_debug_offset); | |
119 | ||
120 | len = snprintf(mdp4_debug_buf, 4, "%x\n", data); | |
121 | ||
122 | if (len > 0) { | |
123 | if (len > count) | |
124 | len = count; | |
125 | if (copy_to_user(buff, mdp4_debug_buf, len)) | |
126 | return -EFAULT; | |
127 | } | |
128 | ||
129 | printk(KERN_INFO "%s: len=%d\n", __func__, len); | |
130 | ||
131 | if (len < 0) | |
132 | return 0; | |
133 | ||
134 | *ppos += len; /* increase offset */ | |
135 | ||
136 | return len; | |
137 | } | |
138 | ||
139 | static const struct file_operations mdp4_debugfs_fops = { | |
3ff81013 | 140 | .open = nonseekable_open, |
9d200153 SM |
141 | .release = mdp4_debugfs_release, |
142 | .read = mdp4_debugfs_read, | |
143 | .write = mdp4_debugfs_write, | |
3ff81013 | 144 | .llseek = no_llseek, |
9d200153 SM |
145 | }; |
146 | ||
147 | int mdp4_debugfs_init(void) | |
148 | { | |
149 | struct dentry *dent = debugfs_create_dir("mdp4", NULL); | |
150 | ||
151 | if (IS_ERR(dent)) { | |
152 | printk(KERN_ERR "%s(%d): debugfs_create_dir fail, error %ld\n", | |
153 | __FILE__, __LINE__, PTR_ERR(dent)); | |
154 | return -1; | |
155 | } | |
156 | ||
157 | if (debugfs_create_file("offset", 0644, dent, 0, &mdp4_offset_fops) | |
158 | == NULL) { | |
159 | printk(KERN_ERR "%s(%d): debugfs_create_file: offset fail\n", | |
160 | __FILE__, __LINE__); | |
161 | return -1; | |
162 | } | |
163 | ||
164 | if (debugfs_create_file("regs", 0644, dent, 0, &mdp4_debugfs_fops) | |
165 | == NULL) { | |
166 | printk(KERN_ERR "%s(%d): debugfs_create_file: regs fail\n", | |
167 | __FILE__, __LINE__); | |
168 | return -1; | |
169 | } | |
170 | ||
171 | mdp4_debug_offset = 0; | |
172 | mdp4_base_addr = (ulong) msm_mdp_base; /* defined at msm_fb_def.h */ | |
173 | ||
174 | return 0; | |
175 | } |