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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* FB driver for the HX8357D LCD Controller
* Copyright (C) 2015 Adafruit Industries
*
* Based on the HX8347D FB driver
* Copyright (C) 2013 Christian Vogelgsang
*
* Based on driver code found here: https://github.com/watterott/r61505u-Adapter
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <video/mipi_display.h>
#include "fbtft.h"
#include "fb_hx8357d.h"
#define DRVNAME "fb_hx8357d"
#define WIDTH 320
#define HEIGHT 480
static int init_display(struct fbtft_par *par)
{
par->fbtftops.reset(par);
/* Reset things like Gamma */
write_reg(par, MIPI_DCS_SOFT_RESET);
usleep_range(5000, 7000);
/* setextc */
write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57);
msleep(150);
/* setRGB which also enables SDO */
write_reg(par, HX8357_SETRGB, 0x00, 0x00, 0x06, 0x06);
/* -1.52V */
write_reg(par, HX8357D_SETCOM, 0x25);
/* Normal mode 70Hz, Idle mode 55 Hz */
write_reg(par, HX8357_SETOSC, 0x68);
/* Set Panel - BGR, Gate direction swapped */
write_reg(par, HX8357_SETPANEL, 0x05);
write_reg(par, HX8357_SETPWR1,
0x00, /* Not deep standby */
0x15, /* BT */
0x1C, /* VSPR */
0x1C, /* VSNR */
0x83, /* AP */
0xAA); /* FS */
write_reg(par, HX8357D_SETSTBA,
0x50, /* OPON normal */
0x50, /* OPON idle */
0x01, /* STBA */
0x3C, /* STBA */
0x1E, /* STBA */
0x08); /* GEN */
write_reg(par, HX8357D_SETCYC,
0x02, /* NW 0x02 */
0x40, /* RTN */
0x00, /* DIV */
0x2A, /* DUM */
0x2A, /* DUM */
0x0D, /* GDON */
0x78); /* GDOFF */
write_reg(par, HX8357D_SETGAMMA,
0x02,
0x0A,
0x11,
0x1d,
0x23,
0x35,
0x41,
0x4b,
0x4b,
0x42,
0x3A,
0x27,
0x1B,
0x08,
0x09,
0x03,
0x02,
0x0A,
0x11,
0x1d,
0x23,
0x35,
0x41,
0x4b,
0x4b,
0x42,
0x3A,
0x27,
0x1B,
0x08,
0x09,
0x03,
0x00,
0x01);
/* 16 bit */
write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0xC0);
/* TE off */
write_reg(par, MIPI_DCS_SET_TEAR_ON, 0x00);
/* tear line */
write_reg(par, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
/* Exit Sleep */
write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
msleep(150);
/* display on */
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
usleep_range(5000, 7000);
return 0;
}
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{
write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
xs >> 8, xs & 0xff, /* XSTART */
xe >> 8, xe & 0xff); /* XEND */
write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
ys >> 8, ys & 0xff, /* YSTART */
ye >> 8, ye & 0xff); /* YEND */
write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
}
#define HX8357D_MADCTL_MY 0x80
#define HX8357D_MADCTL_MX 0x40
#define HX8357D_MADCTL_MV 0x20
#define HX8357D_MADCTL_ML 0x10
#define HX8357D_MADCTL_RGB 0x00
#define HX8357D_MADCTL_BGR 0x08
#define HX8357D_MADCTL_MH 0x04
static int set_var(struct fbtft_par *par)
{
u8 val;
switch (par->info->var.rotate) {
case 270:
val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
break;
case 180:
val = 0;
break;
case 90:
val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
break;
default:
val = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
break;
}
val |= (par->bgr ? HX8357D_MADCTL_RGB : HX8357D_MADCTL_BGR);
/* Memory Access Control */
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val);
return 0;
}
static struct fbtft_display display = {
.regwidth = 8,
.width = WIDTH,
.height = HEIGHT,
.gamma_num = 2,
.gamma_len = 14,
.fbtftops = {
.init_display = init_display,
.set_addr_win = set_addr_win,
.set_var = set_var,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8357d", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:hx8357d");
MODULE_ALIAS("platform:hx8357d");
MODULE_DESCRIPTION("FB driver for the HX8357D LCD Controller");
MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
MODULE_LICENSE("GPL");
|
