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5dc5e4fb TP |
1 | /* |
2 | * FB driver for the SSD1289 LCD Controller | |
3 | * | |
4 | * Copyright (C) 2013 Noralf Tronnes | |
5 | * | |
6 | * Init sequence taken from ITDB02_Graph16.cpp - (C)2010-2011 Henning Karlsen | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
5dc5e4fb TP |
17 | */ |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/gpio.h> | |
23 | ||
24 | #include "fbtft.h" | |
25 | ||
26 | #define DRVNAME "fb_ssd1289" | |
27 | #define WIDTH 240 | |
28 | #define HEIGHT 320 | |
29 | #define DEFAULT_GAMMA "02 03 2 5 7 7 4 2 4 2\n" \ | |
30 | "02 03 2 5 7 5 4 2 4 2" | |
31 | ||
32 | static unsigned reg11 = 0x6040; | |
33 | module_param(reg11, uint, 0); | |
34 | MODULE_PARM_DESC(reg11, "Register 11h value"); | |
35 | ||
5dc5e4fb TP |
36 | static int init_display(struct fbtft_par *par) |
37 | { | |
5dc5e4fb TP |
38 | par->fbtftops.reset(par); |
39 | ||
40 | if (par->gpio.cs != -1) | |
41 | gpio_set_value(par->gpio.cs, 0); /* Activate chip */ | |
42 | ||
43 | write_reg(par, 0x00, 0x0001); | |
44 | write_reg(par, 0x03, 0xA8A4); | |
45 | write_reg(par, 0x0C, 0x0000); | |
46 | write_reg(par, 0x0D, 0x080C); | |
47 | write_reg(par, 0x0E, 0x2B00); | |
48 | write_reg(par, 0x1E, 0x00B7); | |
49 | write_reg(par, 0x01, | |
50 | (1 << 13) | (par->bgr << 11) | (1 << 9) | (HEIGHT - 1)); | |
51 | write_reg(par, 0x02, 0x0600); | |
52 | write_reg(par, 0x10, 0x0000); | |
53 | write_reg(par, 0x05, 0x0000); | |
54 | write_reg(par, 0x06, 0x0000); | |
55 | write_reg(par, 0x16, 0xEF1C); | |
56 | write_reg(par, 0x17, 0x0003); | |
57 | write_reg(par, 0x07, 0x0233); | |
58 | write_reg(par, 0x0B, 0x0000); | |
59 | write_reg(par, 0x0F, 0x0000); | |
60 | write_reg(par, 0x41, 0x0000); | |
61 | write_reg(par, 0x42, 0x0000); | |
62 | write_reg(par, 0x48, 0x0000); | |
63 | write_reg(par, 0x49, 0x013F); | |
64 | write_reg(par, 0x4A, 0x0000); | |
65 | write_reg(par, 0x4B, 0x0000); | |
66 | write_reg(par, 0x44, 0xEF00); | |
67 | write_reg(par, 0x45, 0x0000); | |
68 | write_reg(par, 0x46, 0x013F); | |
69 | write_reg(par, 0x23, 0x0000); | |
70 | write_reg(par, 0x24, 0x0000); | |
71 | write_reg(par, 0x25, 0x8000); | |
72 | write_reg(par, 0x4f, 0x0000); | |
73 | write_reg(par, 0x4e, 0x0000); | |
74 | write_reg(par, 0x22); | |
75 | return 0; | |
76 | } | |
77 | ||
78 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) | |
79 | { | |
5dc5e4fb TP |
80 | switch (par->info->var.rotate) { |
81 | /* R4Eh - Set GDDRAM X address counter */ | |
82 | /* R4Fh - Set GDDRAM Y address counter */ | |
83 | case 0: | |
84 | write_reg(par, 0x4e, xs); | |
85 | write_reg(par, 0x4f, ys); | |
86 | break; | |
87 | case 180: | |
88 | write_reg(par, 0x4e, par->info->var.xres - 1 - xs); | |
89 | write_reg(par, 0x4f, par->info->var.yres - 1 - ys); | |
90 | break; | |
91 | case 270: | |
92 | write_reg(par, 0x4e, par->info->var.yres - 1 - ys); | |
93 | write_reg(par, 0x4f, xs); | |
94 | break; | |
95 | case 90: | |
96 | write_reg(par, 0x4e, ys); | |
97 | write_reg(par, 0x4f, par->info->var.xres - 1 - xs); | |
98 | break; | |
99 | } | |
100 | ||
101 | /* R22h - RAM data write */ | |
102 | write_reg(par, 0x22); | |
103 | } | |
104 | ||
105 | static int set_var(struct fbtft_par *par) | |
106 | { | |
5dc5e4fb TP |
107 | if (par->fbtftops.init_display != init_display) { |
108 | /* don't risk messing up register 11h */ | |
109 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, | |
110 | "%s: skipping since custom init_display() is used\n", | |
111 | __func__); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | switch (par->info->var.rotate) { | |
116 | case 0: | |
153fe946 | 117 | write_reg(par, 0x11, reg11 | 0x30); |
5dc5e4fb TP |
118 | break; |
119 | case 270: | |
153fe946 | 120 | write_reg(par, 0x11, reg11 | 0x28); |
5dc5e4fb TP |
121 | break; |
122 | case 180: | |
153fe946 | 123 | write_reg(par, 0x11, reg11 | 0x00); |
5dc5e4fb TP |
124 | break; |
125 | case 90: | |
153fe946 | 126 | write_reg(par, 0x11, reg11 | 0x18); |
5dc5e4fb TP |
127 | break; |
128 | } | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | /* | |
134 | Gamma string format: | |
135 | VRP0 VRP1 PRP0 PRP1 PKP0 PKP1 PKP2 PKP3 PKP4 PKP5 | |
136 | VRN0 VRN1 PRN0 PRN1 PKN0 PKN1 PKN2 PKN3 PKN4 PKN5 | |
137 | */ | |
94c0a544 | 138 | #define CURVE(num, idx) curves[num * par->gamma.num_values + idx] |
5dc5e4fb TP |
139 | static int set_gamma(struct fbtft_par *par, unsigned long *curves) |
140 | { | |
141 | unsigned long mask[] = { | |
153fe946 GU |
142 | 0x1f, 0x1f, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, |
143 | 0x1f, 0x1f, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, | |
144 | }; | |
5dc5e4fb TP |
145 | int i, j; |
146 | ||
5dc5e4fb TP |
147 | /* apply mask */ |
148 | for (i = 0; i < 2; i++) | |
149 | for (j = 0; j < 10; j++) | |
94c0a544 | 150 | CURVE(i, j) &= mask[i * par->gamma.num_values + j]; |
5dc5e4fb TP |
151 | |
152 | write_reg(par, 0x0030, CURVE(0, 5) << 8 | CURVE(0, 4)); | |
153 | write_reg(par, 0x0031, CURVE(0, 7) << 8 | CURVE(0, 6)); | |
154 | write_reg(par, 0x0032, CURVE(0, 9) << 8 | CURVE(0, 8)); | |
155 | write_reg(par, 0x0033, CURVE(0, 3) << 8 | CURVE(0, 2)); | |
156 | write_reg(par, 0x0034, CURVE(1, 5) << 8 | CURVE(1, 4)); | |
157 | write_reg(par, 0x0035, CURVE(1, 7) << 8 | CURVE(1, 6)); | |
158 | write_reg(par, 0x0036, CURVE(1, 9) << 8 | CURVE(1, 8)); | |
159 | write_reg(par, 0x0037, CURVE(1, 3) << 8 | CURVE(1, 2)); | |
160 | write_reg(par, 0x003A, CURVE(0, 1) << 8 | CURVE(0, 0)); | |
161 | write_reg(par, 0x003B, CURVE(1, 1) << 8 | CURVE(1, 0)); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | #undef CURVE | |
166 | ||
5dc5e4fb TP |
167 | static struct fbtft_display display = { |
168 | .regwidth = 16, | |
169 | .width = WIDTH, | |
170 | .height = HEIGHT, | |
171 | .gamma_num = 2, | |
172 | .gamma_len = 10, | |
173 | .gamma = DEFAULT_GAMMA, | |
174 | .fbtftops = { | |
175 | .init_display = init_display, | |
176 | .set_addr_win = set_addr_win, | |
177 | .set_var = set_var, | |
178 | .set_gamma = set_gamma, | |
179 | }, | |
180 | }; | |
1014c2ce | 181 | |
5dc5e4fb TP |
182 | FBTFT_REGISTER_DRIVER(DRVNAME, "solomon,ssd1289", &display); |
183 | ||
184 | MODULE_ALIAS("spi:" DRVNAME); | |
185 | MODULE_ALIAS("platform:" DRVNAME); | |
186 | MODULE_ALIAS("spi:ssd1289"); | |
187 | MODULE_ALIAS("platform:ssd1289"); | |
188 | ||
189 | MODULE_DESCRIPTION("FB driver for the SSD1289 LCD Controller"); | |
190 | MODULE_AUTHOR("Noralf Tronnes"); | |
191 | MODULE_LICENSE("GPL"); |