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
|
/*
* Copyright (C) 2012 Spreadtrum Communications Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*/
#include <linux/fb.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include "lcdc_reg.h"
//#define LCDC_DEBUG
#ifdef LCDC_DEBUG
#define LCDC_PRINT printk
#else
#define LCDC_PRINT(...)
#endif
int32_t lcm_send_cmd (uint32_t cmd)
{
/* wait for that the ahb enter idle state */
while(lcdc_read(LCM_CTRL) & BIT(20));
lcdc_write(cmd, LCM_CMD);
return 0;
}
int32_t lcm_send_cmd_data (uint32_t cmd, uint32_t data)
{
/* wait for that the ahb enter idle state */
while(lcdc_read(LCM_CTRL) & BIT(20));
lcdc_write(cmd, LCM_CMD);
/* wait for that the ahb enter idle state */
while(lcdc_read(LCM_CTRL) & BIT(20));
lcdc_write(data, LCM_DATA);
return 0;
}
int32_t lcm_send_data (uint32_t data)
{
/* wait for that the ahb enter idle state */
while(lcdc_read(LCM_CTRL) & BIT(20));
lcdc_write(data, LCM_DATA);
return 0;
}
uint32_t lcm_read_data (void)
{
/* wait for that the ahb enter idle state */
while(lcdc_read(LCM_CTRL) & BIT(20));
lcdc_write(1 << 24, LCM_DATA);
udelay(50);
return lcdc_read(LCM_RDDATA);
}
static struct clk * s_lcdcclk = NULL;
int lcm_init(void)
{
//int i;
unsigned int ctrl;
if( NULL == s_lcdcclk ) {
s_lcdcclk = clk_get(NULL, "clk_lcdc");
}
if( s_lcdcclk == NULL ) {
printk(KERN_ERR "can not get clk_lcdc!!!!!\n");
return -EFAULT;
}
clk_enable(s_lcdcclk);
ctrl = lcdc_read(LCM_CTRL);
printk("reg[LCM_CTRL] = %x\n", ctrl);
ctrl &= 0x10000;
ctrl |= 0x02828; // bus&pixel are 24bits
lcdc_write(ctrl, LCM_CTRL);
//lcdc_write((1 << 8) | (5 << 4) | 5, LCM_TIMING0);
//lcdc_write((1 << 8) | (5 << 4) | 5, LCM_TIMING1);
//for( i = LCM_CTRL; i <= LCM_RSTN; i += 4 ) {
// printk("reg[%x] = %x\n", i, lcdc_read(i));
//}
return 0;
}
int lcm_close(void)
{
if( NULL != s_lcdcclk ) {
clk_disable(s_lcdcclk);
}
printk("lcm_close \n");
return 0;
}
|
