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959d049f TP |
1 | /* |
2 | * FB driver for the uPD161704 LCD Controller | |
3 | * | |
4 | * Copyright (C) 2014 Seong-Woo Kim | |
5 | * | |
6 | * Based on fb_ili9325.c by Noralf Tronnes | |
7 | * Based on ili9325.c by Jeroen Domburg | |
8 | * Init code from UTFT library by Henning Karlsen | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
959d049f TP |
19 | */ |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/gpio.h> | |
25 | #include <linux/delay.h> | |
26 | ||
27 | #include "fbtft.h" | |
28 | ||
29 | #define DRVNAME "fb_bd663474" | |
30 | #define WIDTH 240 | |
31 | #define HEIGHT 320 | |
32 | #define BPP 16 | |
33 | ||
34 | static int init_display(struct fbtft_par *par) | |
35 | { | |
959d049f TP |
36 | if (par->gpio.cs != -1) |
37 | gpio_set_value(par->gpio.cs, 0); /* Activate chip */ | |
38 | ||
39 | par->fbtftops.reset(par); | |
40 | ||
41 | /* Initialization sequence from Lib_UTFT */ | |
42 | ||
43 | /* oscillator start */ | |
171c44fc | 44 | write_reg(par, 0x000, 0x0001); /*oscillator 0: stop, 1: operation */ |
959d049f TP |
45 | mdelay(10); |
46 | ||
47 | /* Power settings */ | |
171c44fc AM |
48 | write_reg(par, 0x100, 0x0000); /* power supply setup */ |
49 | write_reg(par, 0x101, 0x0000); | |
50 | write_reg(par, 0x102, 0x3110); | |
51 | write_reg(par, 0x103, 0xe200); | |
52 | write_reg(par, 0x110, 0x009d); | |
53 | write_reg(par, 0x111, 0x0022); | |
54 | write_reg(par, 0x100, 0x0120); | |
55 | mdelay(20); | |
56 | ||
57 | write_reg(par, 0x100, 0x3120); | |
58 | mdelay(80); | |
959d049f | 59 | /* Display control */ |
171c44fc AM |
60 | write_reg(par, 0x001, 0x0100); |
61 | write_reg(par, 0x002, 0x0000); | |
62 | write_reg(par, 0x003, 0x1230); | |
63 | write_reg(par, 0x006, 0x0000); | |
64 | write_reg(par, 0x007, 0x0101); | |
65 | write_reg(par, 0x008, 0x0808); | |
66 | write_reg(par, 0x009, 0x0000); | |
67 | write_reg(par, 0x00b, 0x0000); | |
68 | write_reg(par, 0x00c, 0x0000); | |
69 | write_reg(par, 0x00d, 0x0018); | |
959d049f | 70 | /* LTPS control settings */ |
171c44fc AM |
71 | write_reg(par, 0x012, 0x0000); |
72 | write_reg(par, 0x013, 0x0000); | |
73 | write_reg(par, 0x018, 0x0000); | |
74 | write_reg(par, 0x019, 0x0000); | |
75 | ||
76 | write_reg(par, 0x203, 0x0000); | |
77 | write_reg(par, 0x204, 0x0000); | |
78 | ||
79 | write_reg(par, 0x210, 0x0000); | |
80 | write_reg(par, 0x211, 0x00ef); | |
81 | write_reg(par, 0x212, 0x0000); | |
82 | write_reg(par, 0x213, 0x013f); | |
83 | write_reg(par, 0x214, 0x0000); | |
84 | write_reg(par, 0x215, 0x0000); | |
85 | write_reg(par, 0x216, 0x0000); | |
86 | write_reg(par, 0x217, 0x0000); | |
959d049f TP |
87 | |
88 | /* Gray scale settings */ | |
89 | write_reg(par, 0x300, 0x5343); | |
90 | write_reg(par, 0x301, 0x1021); | |
91 | write_reg(par, 0x302, 0x0003); | |
92 | write_reg(par, 0x303, 0x0011); | |
93 | write_reg(par, 0x304, 0x050a); | |
94 | write_reg(par, 0x305, 0x4342); | |
95 | write_reg(par, 0x306, 0x1100); | |
96 | write_reg(par, 0x307, 0x0003); | |
97 | write_reg(par, 0x308, 0x1201); | |
98 | write_reg(par, 0x309, 0x050a); | |
99 | ||
100 | /* RAM access settings */ | |
171c44fc AM |
101 | write_reg(par, 0x400, 0x4027); |
102 | write_reg(par, 0x401, 0x0000); | |
103 | write_reg(par, 0x402, 0x0000); /* First screen drive position (1) */ | |
104 | write_reg(par, 0x403, 0x013f); /* First screen drive position (2) */ | |
105 | write_reg(par, 0x404, 0x0000); | |
106 | ||
107 | write_reg(par, 0x200, 0x0000); | |
108 | write_reg(par, 0x201, 0x0000); | |
109 | write_reg(par, 0x100, 0x7120); | |
110 | write_reg(par, 0x007, 0x0103); | |
111 | mdelay(10); | |
112 | write_reg(par, 0x007, 0x0113); | |
959d049f TP |
113 | |
114 | return 0; | |
115 | } | |
116 | ||
117 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) | |
118 | { | |
959d049f TP |
119 | switch (par->info->var.rotate) { |
120 | /* R200h = Horizontal GRAM Start Address */ | |
121 | /* R201h = Vertical GRAM Start Address */ | |
122 | case 0: | |
123 | write_reg(par, 0x0200, xs); | |
124 | write_reg(par, 0x0201, ys); | |
125 | break; | |
126 | case 180: | |
127 | write_reg(par, 0x0200, WIDTH - 1 - xs); | |
128 | write_reg(par, 0x0201, HEIGHT - 1 - ys); | |
129 | break; | |
130 | case 270: | |
131 | write_reg(par, 0x0200, WIDTH - 1 - ys); | |
132 | write_reg(par, 0x0201, xs); | |
133 | break; | |
134 | case 90: | |
135 | write_reg(par, 0x0200, ys); | |
136 | write_reg(par, 0x0201, HEIGHT - 1 - xs); | |
137 | break; | |
138 | } | |
139 | write_reg(par, 0x202); /* Write Data to GRAM */ | |
140 | } | |
141 | ||
142 | static int set_var(struct fbtft_par *par) | |
143 | { | |
959d049f TP |
144 | switch (par->info->var.rotate) { |
145 | /* AM: GRAM update direction */ | |
146 | case 0: | |
147 | write_reg(par, 0x003, 0x1230); | |
148 | break; | |
149 | case 180: | |
150 | write_reg(par, 0x003, 0x1200); | |
151 | break; | |
152 | case 270: | |
153 | write_reg(par, 0x003, 0x1228); | |
154 | break; | |
155 | case 90: | |
156 | write_reg(par, 0x003, 0x1218); | |
157 | break; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static struct fbtft_display display = { | |
164 | .regwidth = 16, | |
165 | .width = WIDTH, | |
166 | .height = HEIGHT, | |
167 | .bpp = BPP, | |
168 | .fbtftops = { | |
169 | .init_display = init_display, | |
170 | .set_addr_win = set_addr_win, | |
171 | .set_var = set_var, | |
172 | }, | |
173 | }; | |
1014c2ce | 174 | |
959d049f TP |
175 | FBTFT_REGISTER_DRIVER(DRVNAME, "hitachi,bd663474", &display); |
176 | ||
177 | MODULE_ALIAS("spi:" DRVNAME); | |
178 | MODULE_ALIAS("platform:" DRVNAME); | |
179 | MODULE_ALIAS("spi:bd663474"); | |
180 | MODULE_ALIAS("platform:bd663474"); | |
181 | ||
182 | MODULE_DESCRIPTION("FB driver for the uPD161704 LCD Controller"); | |
183 | MODULE_AUTHOR("Seong-Woo Kim"); | |
184 | MODULE_LICENSE("GPL"); |