forked from notro/fbtft
-
Notifications
You must be signed in to change notification settings - Fork 0
/
fb_hx8347d.c
181 lines (154 loc) · 4.95 KB
/
fb_hx8347d.c
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
/*
* FB driver for the HX8347D LCD Controller
*
* Copyright (C) 2013 Christian Vogelgsang
*
* Based on driver code found here: https://github.com/watterott/r61505u-Adapter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include "fbtft.h"
#define DRVNAME "fb_hx8347d"
#define WIDTH 320
#define HEIGHT 240
#define DEFAULT_GAMMA "0 0 0 0 0 0 0 0 0 0 0 0 0 0\n" \
"0 0 0 0 0 0 0 0 0 0 0 0 0 0"
static int init_display(struct fbtft_par *par)
{
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
par->fbtftops.reset(par);
/* driving ability */
write_reg(par, 0xEA, 0x00);
write_reg(par, 0xEB, 0x20);
write_reg(par, 0xEC, 0x0C);
write_reg(par, 0xED, 0xC4);
write_reg(par, 0xE8, 0x40);
write_reg(par, 0xE9, 0x38);
write_reg(par, 0xF1, 0x01);
write_reg(par, 0xF2, 0x10);
write_reg(par, 0x27, 0xA3);
/* power voltage */
write_reg(par, 0x1B, 0x1B);
write_reg(par, 0x1A, 0x01);
write_reg(par, 0x24, 0x2F);
write_reg(par, 0x25, 0x57);
/* VCOM offset */
write_reg(par, 0x23, 0x8D); /* for flicker adjust */
/* power on */
write_reg(par, 0x18, 0x36);
write_reg(par, 0x19, 0x01); /* start osc */
write_reg(par, 0x01, 0x00); /* wakeup */
write_reg(par, 0x1F, 0x88);
mdelay(5);
write_reg(par, 0x1F, 0x80);
mdelay(5);
write_reg(par, 0x1F, 0x90);
mdelay(5);
write_reg(par, 0x1F, 0xD0);
mdelay(5);
/* color selection */
write_reg(par, 0x17, 0x05); /* 65k */
/*panel characteristic */
write_reg(par, 0x36, 0x00);
/*display on */
write_reg(par, 0x28, 0x38);
mdelay(40);
write_reg(par, 0x28, 0x3C);
/* orientation */
write_reg(par, 0x16, 0x60 | (par->bgr << 3));
return 0;
}
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{
fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
"%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
write_reg(par, 0x02, (xs >> 8) & 0xFF);
write_reg(par, 0x03, xs & 0xFF);
write_reg(par, 0x04, (xe >> 8) & 0xFF);
write_reg(par, 0x05, xe & 0xFF);
write_reg(par, 0x06, (ys >> 8) & 0xFF);
write_reg(par, 0x07, ys & 0xFF);
write_reg(par, 0x08, (ye >> 8) & 0xFF);
write_reg(par, 0x09, ye & 0xFF);
write_reg(par, 0x22);
}
/*
Gamma string format:
VRP0 VRP1 VRP2 VRP3 VRP4 VRP5 PRP0 PRP1 PKP0 PKP1 PKP2 PKP3 PKP4 CGM
VRN0 VRN1 VRN2 VRN3 VRN4 VRN5 PRN0 PRN1 PKN0 PKN1 PKN2 PKN3 PKN4 CGM
*/
#define CURVE(num, idx) curves[num*par->gamma.num_values + idx]
static int set_gamma(struct fbtft_par *par, unsigned long *curves)
{
unsigned long mask[] = {
0b111111, 0b111111, 0b111111, 0b111111, 0b111111, 0b111111,
0b1111111, 0b1111111,
0b11111, 0b11111, 0b11111, 0b11111, 0b11111,
0b1111};
int i, j;
int acc = 0;
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
/* apply mask */
for (i = 0; i < par->gamma.num_curves; i++)
for (j = 0; j < par->gamma.num_values; j++) {
acc += CURVE(i, j);
CURVE(i, j) &= mask[j];
}
if (acc == 0) /* skip if all values are zero */
return 0;
for (i = 0; i < par->gamma.num_curves; i++) {
write_reg(par, 0x40 + (i * 0x10), CURVE(i, 0));
write_reg(par, 0x41 + (i * 0x10), CURVE(i, 1));
write_reg(par, 0x42 + (i * 0x10), CURVE(i, 2));
write_reg(par, 0x43 + (i * 0x10), CURVE(i, 3));
write_reg(par, 0x44 + (i * 0x10), CURVE(i, 4));
write_reg(par, 0x45 + (i * 0x10), CURVE(i, 5));
write_reg(par, 0x46 + (i * 0x10), CURVE(i, 6));
write_reg(par, 0x47 + (i * 0x10), CURVE(i, 7));
write_reg(par, 0x48 + (i * 0x10), CURVE(i, 8));
write_reg(par, 0x49 + (i * 0x10), CURVE(i, 9));
write_reg(par, 0x4A + (i * 0x10), CURVE(i, 10));
write_reg(par, 0x4B + (i * 0x10), CURVE(i, 11));
write_reg(par, 0x4C + (i * 0x10), CURVE(i, 12));
}
write_reg(par, 0x5D, (CURVE(1, 0) << 4) | CURVE(0, 0));
return 0;
}
#undef CURVE
static struct fbtft_display display = {
.regwidth = 8,
.width = WIDTH,
.height = HEIGHT,
.gamma_num = 2,
.gamma_len = 14,
.gamma = DEFAULT_GAMMA,
.fbtftops = {
.init_display = init_display,
.set_addr_win = set_addr_win,
.set_gamma = set_gamma,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8347d", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:hx8347d");
MODULE_ALIAS("platform:hx8347d");
MODULE_DESCRIPTION("FB driver for the HX8347D LCD Controller");
MODULE_AUTHOR("Christian Vogelgsang");
MODULE_LICENSE("GPL");