summaryrefslogtreecommitdiffstats
path: root/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
blob: d5a7e2f142557475982cb9d3c759eefac72a1146 (plain)
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
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2008 by Rob Purchase
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include <sys/types.h>

#include "config.h"
#include "hwcompat.h"
#include "kernel.h"
#include "lcd.h"
#include "system.h"
#include "cpu.h"

/* GPIO A pins for LCD panel SDI interface */

#define LTV250QV_CS  (1<<24)
#define LTV250QV_SCL (1<<25)
#define LTV250QV_SDI (1<<26)

/* LCD Controller registers */

#define LCDC_CTRL    (*(volatile unsigned long *)0xF0000000)
#define LCDC_CLKDIV  (*(volatile unsigned long *)0xF0000008)
#define LCDC_HTIME1  (*(volatile unsigned long *)0xF000000C)
#define LCDC_HTIME2  (*(volatile unsigned long *)0xF0000010)
#define LCDC_VTIME1  (*(volatile unsigned long *)0xF0000014)
#define LCDC_VTIME2  (*(volatile unsigned long *)0xF0000018)
#define LCDC_VTIME3  (*(volatile unsigned long *)0xF000001C)
#define LCDC_VTIME4  (*(volatile unsigned long *)0xF0000020)
#define LCDC_DS      (*(volatile unsigned long *)0xF000005C)
#define LCDC_I1CTRL  (*(volatile unsigned long *)0xF000008C)
#define LCDC_I1POS   (*(volatile unsigned long *)0xF0000090)
#define LCDC_I1SIZE  (*(volatile unsigned long *)0xF0000094)
#define LCDC_I1BASE  (*(volatile unsigned long *)0xF0000098)
#define LCDC_I1OFF   (*(volatile unsigned long *)0xF00000A8)
#define LCDC_I1SCALE (*(volatile unsigned long *)0xF00000AC)

/* Power and display status */
static bool display_on  = false; /* Is the display turned on? */

static unsigned lcd_yuv_options = 0;

/* Framebuffer copy as seen by the hardware */
fb_data lcd_driver_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH];

int lcd_default_contrast(void)
{
    return 0x1f;
}

void lcd_set_contrast(int val)
{
    /* TODO: This won't be implemented until the S6F2002 controller
       is better understood (nb: registers 16-23 control gamma). */
    (void)val;
}


/* LTV250QV panel functions */

/* Delay loop based on CPU frequency (FREQ>>23 is 3..22 for 32MHz..192MHz) */
static void delay_loop(void)
{
    unsigned long x;
    for (x = (unsigned)(FREQ>>23); x; x--);
}
#define DELAY delay_loop()

static void ltv250qv_write(unsigned int command)
{
    int i;
    
    GPIOA_CLEAR = LTV250QV_CS;
    DELAY;

    for (i = 23; i >= 0; i--)
    {
      GPIOA_CLEAR = LTV250QV_SCL;
      DELAY;

      if ((command>>i) & 1)
        GPIOA_SET = LTV250QV_SDI;
      else
        GPIOA_CLEAR = LTV250QV_SDI;
      
      DELAY;
      GPIOA_SET = LTV250QV_SCL;
    }

    DELAY;
    GPIOA_SET = LTV250QV_CS;
}

static void lcd_write_reg(unsigned char reg, unsigned short val)
{
    int level = disable_irq_save();
    
    ltv250qv_write(0x740000 | reg);
    ltv250qv_write(0x760000 | val);
    
    restore_irq(level);
}

static void lcd_display_on(void)
{
    /* power on sequence as per the D2 firmware */
    GPIOA_SET = (1<<16);
    udelay(10000);
    
    lcd_write_reg(1,  0x1D);
    lcd_write_reg(2,  0x0);
    lcd_write_reg(3,  0x0);
    lcd_write_reg(4,  0x0);
    lcd_write_reg(5,  0x40A3);
    lcd_write_reg(6,  0x0);
    lcd_write_reg(7,  0x0);
    lcd_write_reg(8,  0x0);
    lcd_write_reg(9,  0x0);
    lcd_write_reg(10, 0x0);
    lcd_write_reg(16, 0x0);
    lcd_write_reg(17, 0x0);
    lcd_write_reg(18, 0x0);
    lcd_write_reg(19, 0x0);
    lcd_write_reg(20, 0x0);
    lcd_write_reg(21, 0x0);
    lcd_write_reg(22, 0x0);
    lcd_write_reg(23, 0x0);
    lcd_write_reg(24, 0x0);
    lcd_write_reg(25, 0x0);
    udelay(10000);
    
    lcd_write_reg(9,  0x4055);
    lcd_write_reg(10, 0x0);
    udelay(40000);
    
    lcd_write_reg(10, 0x2000);
    udelay(40000);
    
    lcd_write_reg(1,  0xC01D);
    lcd_write_reg(2,  0x204);
    lcd_write_reg(3,  0xE100);
    lcd_write_reg(4,  0x1000);
    lcd_write_reg(5,  0x5033);
    lcd_write_reg(6,  0x2);     /* vertical back porch adjusted from 0x4 in OF */
    lcd_write_reg(7,  0x30);
    lcd_write_reg(8,  0x41C);
    lcd_write_reg(16, 0x207);
    lcd_write_reg(17, 0x702);
    lcd_write_reg(18, 0xB05);
    lcd_write_reg(19, 0xB05);
    lcd_write_reg(20, 0x707);
    lcd_write_reg(21, 0x507);
    lcd_write_reg(22, 0x103);
    lcd_write_reg(23, 0x406);
    lcd_write_reg(24, 0x2);
    lcd_write_reg(25, 0x0);
    udelay(60000);
    
    lcd_write_reg(9,  0xA55);
    lcd_write_reg(10, 0x111F);
    udelay(10000);

    /* tell that we're on now */
    display_on = true;
}

static void lcd_display_off(void)
{
    /* block drawing operations and changing of first */
    display_on = false;

    /* LQV shutdown sequence */
    lcd_write_reg(9,  0x55);
    lcd_write_reg(10, 0x1417);
    lcd_write_reg(5,  0x4003);
    udelay(10000);
    
    lcd_write_reg(9, 0x0);
    udelay(10000);
    
    /* kill power to LCD panel (unconfirmed) */
    GPIOA_CLEAR = (1<<16);
}


void lcd_enable(bool on)
{
    if (on == display_on)
        return;

    if (on)
    {
        lcd_display_on();
        LCDC_CTRL |= 1;     /* controller enable */
        lcd_update();       /* Resync display */
        send_event(LCD_EVENT_ACTIVATION, NULL);
    }
    else
    {
        LCDC_CTRL &= ~1;    /* controller disable */
        lcd_display_off();
    }
}

bool lcd_active(void)
{
    return display_on;
}

/* TODO: implement lcd_sleep() and separate out the power on/off functions */

void lcd_init_device(void)
{
    BCLKCTR |= 4;   /* enable LCD bus clock */
    
    /* set PCK_LCD to 108Mhz */
    PCLK_LCD &= ~PCK_EN;
    PCLK_LCD = PCK_EN | (CKSEL_PLL1<<24) | 1;  /* source = PLL1, divided by 2 */
    
    /* reset the LCD controller */
    SWRESET |= 4;
    SWRESET &= ~4;
    
    /* set port configuration */
    PORTCFG1 &= ~0xC0000000;
    PORTCFG1 &= ~0x3FC0;
    PORTCFG2 &= ~0x100;
    
    /* set physical display size */
    LCDC_DS = (LCD_HEIGHT<<16) | LCD_WIDTH;

    LCDC_HTIME1 = (0x2d<<16) | 0x3bf;
    LCDC_HTIME2 = (1<<16) | 1;
    LCDC_VTIME1 = LCDC_VTIME3 = (0<<16) | 239;
    LCDC_VTIME2 = LCDC_VTIME4 = (1<<16) | 3;

    LCDC_I1BASE  = (unsigned int)lcd_driver_framebuffer;
    LCDC_I1SIZE  = (LCD_HEIGHT<<16) | LCD_WIDTH;  /* image 1 size */
    LCDC_I1POS   = (0<<16) | 0;                   /* position */
    LCDC_I1OFF   = 0;                             /* address offset */
    LCDC_I1SCALE = 0;                             /* scaling */
    LCDC_I1CTRL  = 5;                             /* 565bpp (7 = 888bpp) */
    LCDC_CTRL &= ~(1<<28);

    LCDC_CLKDIV = (LCDC_CLKDIV &~ 0xFF00FF) | (1<<16) | 2; /* and this means? */
    
    /* set and clear various flags - not investigated yet */
    LCDC_CTRL &~ 0x090006AA;  /* clear bits 1,3,5,7,9,10,24,27 */
    LCDC_CTRL |= 0x02800144;  /*   set bits 2,6,8,25,23 */
    LCDC_CTRL = (LCDC_CTRL &~ 0xF0000) | 0x20000;
    LCDC_CTRL = (LCDC_CTRL &~ 0x700000) | 0x700000;

    /* enable LCD controller */
    LCDC_CTRL |= 1;
    
    /* enable LTV250QV panel */
    lcd_display_on();
}


/*** Update functions ***/


/* Copies a rectangle from one framebuffer to another. Can be used in
   single transfer mode with width = num pixels, and height = 1 which
   allows a full-width rectangle to be copied more efficiently. */
extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
                                 int width, int height);

/* Update the display.
   This must be called after all other LCD functions that change the display. */
void lcd_update(void) ICODE_ATTR;
void lcd_update(void)
{
    if (!display_on)
        return;

    lcd_copy_buffer_rect(&lcd_driver_framebuffer[0][0],
                         &lcd_framebuffer[0][0], LCD_WIDTH*LCD_HEIGHT, 1);
}

/* Update a fraction of the display. */
void lcd_update_rect(int, int, int, int) ICODE_ATTR;
void lcd_update_rect(int x, int y, int width, int height)
{
    fb_data *dst, *src;

    if (!display_on)
        return;

    if (x + width > LCD_WIDTH)
        width = LCD_WIDTH - x; /* Clip right */
    if (x < 0)
        width += x, x = 0; /* Clip left */
    if (width <= 0)
        return; /* nothing left to do */

    if (y + height > LCD_HEIGHT)
        height = LCD_HEIGHT - y; /* Clip bottom */
    if (y < 0)
        height += y, y = 0; /* Clip top */
    if (height <= 0)
        return; /* nothing left to do */

    /* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer
     * and lcd_framebuffer */
    dst = &lcd_driver_framebuffer[y][x];
    src = &lcd_framebuffer[y][x];

    /* Copy part of the Rockbox framebuffer to the second framebuffer */
    if (width < LCD_WIDTH)
    {
        /* Not full width - do line-by-line */
        lcd_copy_buffer_rect(dst, src, width, height);
    }
    else
    {
        /* Full width - copy as one line */
        lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
    }
}

void lcd_set_flip(bool yesno)
{
    // TODO
    (void)yesno;
}

void lcd_set_invert_display(bool yesno)
{
    // TODO
    (void)yesno;
}

void lcd_yuv_set_options(unsigned options)
{
    lcd_yuv_options = options;
}

/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
extern void lcd_write_yuv420_lines(fb_data *dst,
                                   unsigned char const * const src[3],
                                   int width,
                                   int stride);

extern void lcd_write_yuv420_lines_odither(fb_data *dst,
                                           unsigned char const * const src[3],
                                           int width,
                                           int stride,
                                           int x_screen, /* To align dither pattern */
                                           int y_screen);

/* Performance function to blit a YUV bitmap directly to the LCD */
void lcd_blit_yuv(unsigned char * const src[3],
                  int src_x, int src_y, int stride,
                  int x, int y, int width, int height)
{
    unsigned char const * yuv_src[3];
    off_t z;

    if (!display_on)
        return;

    /* Sorry, but width and height must be >= 2 or else */
    width &= ~1;
    height >>= 1;

    fb_data *dst = &lcd_driver_framebuffer[y][x];

    z = stride*src_y;
    yuv_src[0] = src[0] + z + src_x;
    yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
    yuv_src[2] = src[2] + (yuv_src[1] - src[1]);

    if (lcd_yuv_options & LCD_YUV_DITHER)
    {
        do
        {
            lcd_write_yuv420_lines_odither(dst, yuv_src, width, stride, y, x);
            yuv_src[0] += stride << 1; /* Skip down two luma lines */
            yuv_src[1] += stride >> 1; /* Skip down one chroma line */
            yuv_src[2] += stride >> 1;
            dst += 2*LCD_FBWIDTH;
            y -= 2;
        }
        while (--height > 0);
    }
    else
    {
        do
        {
            lcd_write_yuv420_lines(dst, yuv_src, width, stride);
            yuv_src[0] += stride << 1; /* Skip down two luma lines */
            yuv_src[1] += stride >> 1; /* Skip down one chroma line */
            yuv_src[2] += stride >> 1;
            dst += 2*LCD_FBWIDTH;
        }
        while (--height > 0);
    }
}