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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Rockbox driver for iPod LCDs
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in November 2005
*
* Original file: linux/arch/armnommu/mach-ipod/fb.c
*
* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "system.h"
#include "hwcompat.h"
/* LCD command codes for HD66753 */
#define R_START_OSC 0x00
#define R_DRV_OUTPUT_CONTROL 0x01
#define R_DRV_WAVEFORM_CONTROL 0x02
#define R_POWER_CONTROL 0x03
#define R_CONTRAST_CONTROL 0x04
#define R_ENTRY_MODE 0x05
#define R_ROTATION 0x06
#define R_DISPLAY_CONTROL 0x07
#define R_CURSOR_CONTROL 0x08
#define R_HORIZONTAL_CURSOR_POS 0x0b
#define R_VERTICAL_CURSOR_POS 0x0c
#define R_1ST_SCR_DRV_POS 0x0d
#define R_2ND_SCR_DRV_POS 0x0e
#define R_RAM_WRITE_MASK 0x10
#define R_RAM_ADDR_SET 0x11
#define R_RAM_DATA 0x12
#ifdef HAVE_BACKLIGHT_INVERSION
/* The backlight makes the LCD appear negative on the 1st/2nd gen */
static bool lcd_inverted = false;
static bool lcd_backlit = false;
static void invert_display(void);
#endif
#if defined(IPOD_1G2G) || defined(IPOD_3G)
static unsigned short power_reg_h;
#define POWER_REG_H power_reg_h
#else
#define POWER_REG_H 0x1200
#endif
#ifdef IPOD_1G2G
static unsigned short contrast_reg_h;
#define CONTRAST_REG_H contrast_reg_h
#else
#define CONTRAST_REG_H 0x400
#endif
/* needed for flip */
static int addr_offset;
#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
static int pix_offset;
#endif
static const unsigned char dibits[16] ICONST_ATTR = {
0x00, 0x03, 0x0C, 0x0F, 0x30, 0x33, 0x3C, 0x3F,
0xC0, 0xC3, 0xCC, 0xCF, 0xF0, 0xF3, 0xFC, 0xFF
};
/* wait for LCD with timeout */
static inline void lcd_wait_write(void)
{
while (LCD1_CONTROL & LCD1_BUSY_MASK);
}
/* send LCD data */
#if CONFIG_CPU == PP5002
STATICIRAM void ICODE_ATTR lcd_send_data(unsigned data)
#else
static void lcd_send_data(unsigned data)
#endif
{
lcd_wait_write();
#ifdef IPOD_MINI2G
LCD1_CMD = data | 0x760000;
#else
LCD1_DATA = data >> 8;
lcd_wait_write();
LCD1_DATA = data & 0xff;
#endif
}
/* send LCD command */
static void lcd_prepare_cmd(unsigned cmd)
{
lcd_wait_write();
#ifdef IPOD_MINI2G
LCD1_CMD = cmd | 0x740000;
#else
LCD1_CMD = 0;
lcd_wait_write();
LCD1_CMD = cmd;
#endif
}
/* send LCD command and data */
static void lcd_cmd_and_data(unsigned cmd, unsigned data)
{
lcd_prepare_cmd(cmd);
lcd_send_data(data);
}
/* LCD init */
void lcd_init_device(void)
{
#ifdef IPOD_1G2G
if ((IPOD_HW_REVISION >> 16) == 1)
{
power_reg_h = 0x1500;
contrast_reg_h = 0x700;
}
else /* 2nd gen */
{
if (inl(0xcf00404c) & 0x01) /* check bit 0 */
{
power_reg_h = 0x1520; /* Set step-up frequency to f/8 instead of
* f/32, for better blacklevel stability */
contrast_reg_h = 0x400;
}
else
{
power_reg_h = 0x1100;
contrast_reg_h = 0x300;
}
}
#elif defined IPOD_3G
if (inl(0xcf00404c) & 0x01) /* check bit 0 */
power_reg_h = 0x1520; /* Set step-up frequency to f/8 instead of
* f/32, for better blacklevel stability */
else
power_reg_h = 0x1100;
#endif
#ifdef IPOD_MINI2G /* serial LCD hookup */
lcd_wait_write();
LCD1_CONTROL = 0x01730084; /* fastest setting */
#elif defined(IPOD_1G2G) || defined(IPOD_3G)
LCD1_CONTROL = (LCD1_CONTROL & 0x0002) | 0x0084; /* fastest setting, keep backlight bit */
#else
LCD1_CONTROL = 0x0084; /* fastest setting */
#endif
lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0xc);
#ifdef HAVE_BACKLIGHT_INVERSION
invert_display();
#else
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
#endif
lcd_set_flip(false);
lcd_cmd_and_data(R_ENTRY_MODE, 0x0000);
#ifdef IPOD_4G
GPIOB_ENABLE |= 0x4; /* B02 enable */
GPIOB_ENABLE |= 0x8; /* B03 enable */
GPO32_ENABLE |= 0x2000000; /* D01 enable */
GPO32_VAL |= 0x2000000; /* D01 =1 */
DEV_EN |= 0x20000; /* PWM enable */
#endif
}
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
#ifdef IPOD_1G2G
return 28;
#elif defined(IPOD_MINI) || defined(IPOD_MINI2G) || defined(IPOD_3G)
return 42;
#elif defined(IPOD_4G)
return 35;
#endif
}
/* Rockbox stores the contrast as 0..63 - we add 64 to it */
void lcd_set_contrast(int val)
{
if (val < 0) val = 0;
else if (val > 63) val = 63;
lcd_cmd_and_data(R_CONTRAST_CONTROL, CONTRAST_REG_H | (val + 64));
}
#ifdef HAVE_BACKLIGHT_INVERSION
static void invert_display(void)
{
if (lcd_inverted ^ lcd_backlit)
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0017);
else
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
}
void lcd_set_invert_display(bool yesno)
{
lcd_inverted = yesno;
invert_display();
}
void lcd_set_backlight_inversion(bool yesno)
{
lcd_backlit = yesno;
invert_display();
}
#else
void lcd_set_invert_display(bool yesno)
{
if (yesno)
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0017);
else
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
}
#endif
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
if (yesno) {
/* 168x112, inverse COM order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x020d);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x8316); /* 22..131 */
addr_offset = (22 << 5) | (20 - 4);
pix_offset = -2;
} else {
/* 168x112, inverse SEG order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x010d);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x6d00); /* 0..109 */
addr_offset = 20;
pix_offset = 0;
}
#else
if (yesno) {
/* 168x128, inverse SEG & COM order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x030f);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x8304); /* 4..131 */
addr_offset = (4 << 5) | (20 - 1);
} else {
/* 168x128 */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x000f);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x7f00); /* 0..127 */
addr_offset = 20;
}
#endif
}
void lcd_enable(bool on)
{
if (on)
{
lcd_cmd_and_data(R_START_OSC, 1); /* start oscillation */
sleep(HZ/10); /* wait 10ms */
lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H); /*clear standby mode */
lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0xc);
/* enable opamp & booster */
}
else
{
lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H);
/* switch off opamp & booster */
lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0x1);
/* enter standby mode */
}
}
/*** update functions ***/
/* Performance function that works with an external buffer
note that x, bwidtht and stride are in 8-pixel units! */
void lcd_blit(const unsigned char* data, int bx, int y, int bwidth,
int height, int stride)
{
const unsigned char *src, *src_end;
while (height--) {
src = data;
src_end = data + bwidth;
lcd_cmd_and_data(R_RAM_ADDR_SET, (y++ << 5) + addr_offset - bx);
lcd_prepare_cmd(R_RAM_DATA);
do {
unsigned byte = *src++;
lcd_send_data((dibits[byte>>4] << 8) | dibits[byte&0x0f]);
} while (src < src_end);
data += stride;
}
}
void lcd_update_rect(int x, int y, int width, int height)
{
int xmax, ymax;
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (width <= 0)
return;
ymax = y + height - 1;
if (ymax >= LCD_HEIGHT)
ymax = LCD_HEIGHT - 1;
#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
x += pix_offset;
#endif
/* writing is done in 16-bit units (8 pixels) */
xmax = (x + width - 1) >> 3;
x >>= 3;
width = xmax - x + 1;
for (; y <= ymax; y++) {
unsigned char *data, *data_end;
lcd_cmd_and_data(R_RAM_ADDR_SET, (y << 5) + addr_offset - x);
lcd_prepare_cmd(R_RAM_DATA);
data = &lcd_framebuffer[y][2*x];
data_end = data + 2 * width;
#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
if (pix_offset == -2) {
unsigned cur_word = *data++;
do {
cur_word = (cur_word << 8) | *data++;
cur_word = (cur_word << 8) | *data++;
lcd_send_data((cur_word >> 4) & 0xffff);
} while (data <= data_end);
} else
#endif
{
do {
unsigned highbyte = *data++;
lcd_send_data((highbyte << 8) | *data++);
} while (data < data_end);
}
}
}
/* Update the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
#ifdef HAVE_LCD_SHUTDOWN
/* LCD powerdown */
void lcd_shutdown(void)
{
lcd_cmd_and_data(R_POWER_CONTROL, 0x1500); /* Turn off op amp power */
lcd_cmd_and_data(R_POWER_CONTROL, 0x1502); /* Put LCD driver in standby */
}
#endif
|
