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7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/spi/spi.h>
12#include <linux/delay.h>
13
14#include "fbtft.h"
15
16#define DRVNAME "fb_ili9320"
17#define WIDTH 240
18#define HEIGHT 320
19#define DEFAULT_GAMMA "07 07 6 0 0 0 5 5 4 0\n" \
20 "07 08 4 7 5 1 2 0 7 7"
21
22static unsigned int read_devicecode(struct fbtft_par *par)
23{
24 u8 rxbuf[8] = {0, };
25
26 write_reg(par, 0x0000);
27 par->fbtftops.read(par, rxbuf, 4);
28 return (rxbuf[2] << 8) | rxbuf[3];
29}
30
31static int init_display(struct fbtft_par *par)
32{
33 unsigned int devcode;
34
35 par->fbtftops.reset(par);
36
37 devcode = read_devicecode(par);
38 fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "Device code: 0x%04X\n",
39 devcode);
40 if ((devcode != 0x0000) && (devcode != 0x9320))
41 dev_warn(par->info->device,
42 "Unrecognized Device code: 0x%04X (expected 0x9320)\n",
43 devcode);
44
45
46
47
48
49 write_reg(par, 0x00E5, 0x8000);
50
51
52 write_reg(par, 0x0000, 0x0001);
53
54
55 write_reg(par, 0x0001, 0x0100);
56
57
58 write_reg(par, 0x0002, 0x0700);
59
60
61 write_reg(par, 0x0004, 0x0000);
62
63
64 write_reg(par, 0x0008, 0x0202);
65
66
67 write_reg(par, 0x0009, 0x0000);
68
69
70 write_reg(par, 0x000A, 0x0000);
71
72
73 write_reg(par, 0x000C, 0x0000);
74
75
76 write_reg(par, 0x000D, 0x0000);
77
78
79 write_reg(par, 0x000F, 0x0000);
80
81
82
83 write_reg(par, 0x0010, 0x0000);
84
85
86 write_reg(par, 0x0011, 0x0007);
87
88
89 write_reg(par, 0x0012, 0x0000);
90
91
92 write_reg(par, 0x0013, 0x0000);
93
94
95 mdelay(200);
96
97
98 write_reg(par, 0x0010, 0x17B0);
99
100
101 write_reg(par, 0x0011, 0x0031);
102 mdelay(50);
103
104
105 write_reg(par, 0x0012, 0x0138);
106 mdelay(50);
107
108
109 write_reg(par, 0x0013, 0x1800);
110
111
112 write_reg(par, 0x0029, 0x0008);
113 mdelay(50);
114
115
116 write_reg(par, 0x0020, 0x0000);
117
118
119 write_reg(par, 0x0021, 0x0000);
120
121
122
123 write_reg(par, 0x0050, 0x0000);
124
125
126 write_reg(par, 0x0051, 0x00EF);
127
128
129 write_reg(par, 0x0052, 0x0000);
130
131
132 write_reg(par, 0x0053, 0x013F);
133
134
135 write_reg(par, 0x0060, 0x2700);
136
137
138 write_reg(par, 0x0061, 0x0001);
139
140
141 write_reg(par, 0x006A, 0x0000);
142
143
144 write_reg(par, 0x0080, 0x0000);
145 write_reg(par, 0x0081, 0x0000);
146 write_reg(par, 0x0082, 0x0000);
147 write_reg(par, 0x0083, 0x0000);
148 write_reg(par, 0x0084, 0x0000);
149 write_reg(par, 0x0085, 0x0000);
150
151
152 write_reg(par, 0x0090, 0x0010);
153 write_reg(par, 0x0092, 0x0000);
154 write_reg(par, 0x0093, 0x0003);
155 write_reg(par, 0x0095, 0x0110);
156 write_reg(par, 0x0097, 0x0000);
157 write_reg(par, 0x0098, 0x0000);
158 write_reg(par, 0x0007, 0x0173);
159
160 return 0;
161}
162
163static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
164{
165 switch (par->info->var.rotate) {
166
167
168 case 0:
169 write_reg(par, 0x0020, xs);
170 write_reg(par, 0x0021, ys);
171 break;
172 case 180:
173 write_reg(par, 0x0020, WIDTH - 1 - xs);
174 write_reg(par, 0x0021, HEIGHT - 1 - ys);
175 break;
176 case 270:
177 write_reg(par, 0x0020, WIDTH - 1 - ys);
178 write_reg(par, 0x0021, xs);
179 break;
180 case 90:
181 write_reg(par, 0x0020, ys);
182 write_reg(par, 0x0021, HEIGHT - 1 - xs);
183 break;
184 }
185 write_reg(par, 0x0022);
186}
187
188static int set_var(struct fbtft_par *par)
189{
190 switch (par->info->var.rotate) {
191 case 0:
192 write_reg(par, 0x3, (par->bgr << 12) | 0x30);
193 break;
194 case 270:
195 write_reg(par, 0x3, (par->bgr << 12) | 0x28);
196 break;
197 case 180:
198 write_reg(par, 0x3, (par->bgr << 12) | 0x00);
199 break;
200 case 90:
201 write_reg(par, 0x3, (par->bgr << 12) | 0x18);
202 break;
203 }
204 return 0;
205}
206
207
208
209
210
211
212#define CURVE(num, idx) curves[(num) * par->gamma.num_values + (idx)]
213static int set_gamma(struct fbtft_par *par, u32 *curves)
214{
215 static const unsigned long mask[] = {
216 0x1f, 0x1f, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
217 0x1f, 0x1f, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
218 };
219 int i, j;
220
221
222 for (i = 0; i < 2; i++)
223 for (j = 0; j < 10; j++)
224 CURVE(i, j) &= mask[i * par->gamma.num_values + j];
225
226 write_reg(par, 0x0030, CURVE(0, 5) << 8 | CURVE(0, 4));
227 write_reg(par, 0x0031, CURVE(0, 7) << 8 | CURVE(0, 6));
228 write_reg(par, 0x0032, CURVE(0, 9) << 8 | CURVE(0, 8));
229 write_reg(par, 0x0035, CURVE(0, 3) << 8 | CURVE(0, 2));
230 write_reg(par, 0x0036, CURVE(0, 1) << 8 | CURVE(0, 0));
231
232 write_reg(par, 0x0037, CURVE(1, 5) << 8 | CURVE(1, 4));
233 write_reg(par, 0x0038, CURVE(1, 7) << 8 | CURVE(1, 6));
234 write_reg(par, 0x0039, CURVE(1, 9) << 8 | CURVE(1, 8));
235 write_reg(par, 0x003C, CURVE(1, 3) << 8 | CURVE(1, 2));
236 write_reg(par, 0x003D, CURVE(1, 1) << 8 | CURVE(1, 0));
237
238 return 0;
239}
240
241#undef CURVE
242
243static struct fbtft_display display = {
244 .regwidth = 16,
245 .width = WIDTH,
246 .height = HEIGHT,
247 .gamma_num = 2,
248 .gamma_len = 10,
249 .gamma = DEFAULT_GAMMA,
250 .fbtftops = {
251 .init_display = init_display,
252 .set_addr_win = set_addr_win,
253 .set_var = set_var,
254 .set_gamma = set_gamma,
255 },
256};
257
258FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9320", &display);
259
260MODULE_ALIAS("spi:" DRVNAME);
261MODULE_ALIAS("platform:" DRVNAME);
262MODULE_ALIAS("spi:ili9320");
263MODULE_ALIAS("platform:ili9320");
264
265MODULE_DESCRIPTION("FB driver for the ILI9320 LCD Controller");
266MODULE_AUTHOR("Noralf Tronnes");
267MODULE_LICENSE("GPL");
268