firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2004 by Linus Nielsen Feltzing
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "config.h"
  22
  23 #include "cpu.h"
  24 #include "lcd.h"
  25 #include "kernel.h"
  26 #include "thread.h"
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include "file.h"
  30 #include "debug.h"
  31 #include "system.h"
  32 #include "font.h"
  33 #include "bidi.h"
  34 #include "clock-target.h"
  35
  36 static bool display_on = false; /* is the display turned on? */
  37 static bool display_flipped = false;
  38 /* we need to write a red pixel for correct button reads
  39  * (see lcd_button_support()), but that must not happen while the lcd is updating
  40  * so block lcd_button_support the during updates */
  41 static volatile bool lcd_busy = false;
  42
  43 /* register defines */
  44 #define R_START_OSC             0x00
  45 #define R_DRV_OUTPUT_CONTROL    0x01
  46 #define R_DRV_WAVEFORM_CONTROL  0x02
  47 #define R_ENTRY_MODE            0x03
  48 #define R_COMPARE_REG1          0x04
  49 #define R_COMPARE_REG2          0x05
  50
  51 #define R_DISP_CONTROL1     0x07
  52 #define R_DISP_CONTROL2     0x08
  53 #define R_DISP_CONTROL3     0x09
  54
  55 #define R_FRAME_CYCLE_CONTROL 0x0b
  56 #define R_EXT_DISP_IF_CONTROL 0x0c
  57
  58 #define R_POWER_CONTROL1    0x10
  59 #define R_POWER_CONTROL2    0x11
  60 #define R_POWER_CONTROL3    0x12
  61 #define R_POWER_CONTROL4    0x13
  62
  63 #define R_RAM_ADDR_SET  0x21
  64 #define R_WRITE_DATA_2_GRAM 0x22
  65
  66 #define R_GAMMA_FINE_ADJ_POS1   0x30
  67 #define R_GAMMA_FINE_ADJ_POS2   0x31
  68 #define R_GAMMA_FINE_ADJ_POS3   0x32
  69 #define R_GAMMA_GRAD_ADJ_POS    0x33
  70
  71 #define R_GAMMA_FINE_ADJ_NEG1   0x34
  72 #define R_GAMMA_FINE_ADJ_NEG2   0x35
  73 #define R_GAMMA_FINE_ADJ_NEG3   0x36
  74 #define R_GAMMA_GRAD_ADJ_NEG    0x37
  75
  76 #define R_GAMMA_AMP_ADJ_RES_POS     0x38
  77 #define R_GAMMA_AMP_AVG_ADJ_RES_NEG 0x39
  78
  79 #define R_GATE_SCAN_POS         0x40
  80 #define R_VERT_SCROLL_CONTROL   0x41
  81 #define R_1ST_SCR_DRV_POS       0x42
  82 #define R_2ND_SCR_DRV_POS       0x43
  83 #define R_HORIZ_RAM_ADDR_POS    0x44
  84 #define R_VERT_RAM_ADDR_POS     0x45
  85
  86 /* Flip Flag */
  87 #define R_ENTRY_MODE_HORZ_NORMAL 0x7030
  88 #define R_ENTRY_MODE_HORZ_FLIPPED 0x7000
  89 static unsigned short r_entry_mode = R_ENTRY_MODE_HORZ_NORMAL;
  90 #define R_ENTRY_MODE_VERT 0x7038
  91 #define R_ENTRY_MODE_SOLID_VERT  0x1038
  92 #define R_ENTRY_MODE_VIDEO_NORMAL 0x7020
  93 #define R_ENTRY_MODE_VIDEO_FLIPPED 0x7010
  94
  95
  96 /* Reverse Flag */
  97 #define R_DISP_CONTROL_NORMAL 0x0004
  98 #define R_DISP_CONTROL_REV    0x0000
  99 static unsigned short r_disp_control_rev = R_DISP_CONTROL_NORMAL;
 100
 101 /* TODO: Implement this function */
 102 static void lcd_delay(int x)
 103 {
 104     /* This is just arbitrary - the OF does something more complex */
 105     x *= 1024;
 106     while (x--);
 107 }
 108
 109 /* DBOP initialisation, do what OF does */
 110 static void ams3525_dbop_init(void)
 111 {
 112     CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
 113
 114     DBOP_TIMPOL_01 = 0xe167e167;
 115     DBOP_TIMPOL_23 = 0xe167006e;
 116     DBOP_CTRL = (1<<18)|(1<<12)|(8<<0);  /* short count, 16bit write, read-timing =8 */
 117
 118     GPIOB_AFSEL = 0xfc;
 119     GPIOC_AFSEL = 0xff;
 120
 121     DBOP_TIMPOL_23 = 0x6000e;
 122     DBOP_CTRL = (1<<18)|(1<<16)|(1<<12)|(8<<0);/* short count,write enable, 16bit write, read-timing =8 */
 123     DBOP_TIMPOL_01 = 0x6e167;
 124     DBOP_TIMPOL_23 = 0xa167e06f;
 125
 126     /* TODO: The OF calls some other functions here, but maybe not important */
 127 }
 128
 129
 130 static void lcd_write_cmd(int cmd)
 131 {
 132     /* Write register */
 133     DBOP_CTRL &= ~(1<<14);
 134
 135     DBOP_TIMPOL_23 = 0xa167006e;
 136
 137     DBOP_DOUT = cmd;
 138
 139     /* Wait for fifo to empty */
 140     while ((DBOP_STAT & (1<<10)) == 0);
 141
 142     /* Fuze OF has this loop and it seems to help us now also */
 143     int delay=8;
 144     while(delay--);
 145
 146     DBOP_TIMPOL_23 = 0xa167e06f;
 147 }
 148
 149 void lcd_write_data(const fb_data* p_bytes, int count)
 150 {
 151     while (count--)
 152     {
 153         DBOP_DOUT = *p_bytes++;
 154
 155         /* Wait for fifo to empty */
 156         while ((DBOP_STAT & (1<<10)) == 0);
 157     }
 158 }
 159
 160 static void lcd_write_reg(int reg, int value)
 161 {
 162     fb_data data = value;
 163
 164     lcd_write_cmd(reg);
 165     lcd_write_data(&data, 1);
 166 }
 167
 168 /*** hardware configuration ***/
 169
 170 void lcd_set_contrast(int val)
 171 {
 172     (void)val;
 173 }
 174
 175 void lcd_set_invert_display(bool yesno)
 176 {
 177     r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
 178                                  R_DISP_CONTROL_NORMAL;
 179
 180     if (display_on)
 181     {
 182         lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 183     }
 184
 185 }
 186
 187 /* turn the display upside down  */
 188 void lcd_set_flip(bool yesno)
 189 {
 190     display_flipped = yesno;
 191
 192     r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
 193                            R_ENTRY_MODE_HORZ_NORMAL;
 194 }
 195
 196 static void lcd_window(int xmin, int ymin, int xmax, int ymax)
 197 {
 198     if (!display_flipped)
 199     {
 200         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 201         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 202         lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | xmin);
 203     }
 204     else
 205     {
 206         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 207         lcd_write_reg(R_VERT_RAM_ADDR_POS,  ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_HEIGHT-1 - ymax));
 208         lcd_write_reg(R_RAM_ADDR_SET,       ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_WIDTH-1 - xmin));
 209     }
 210 }
 211
 212 static void _display_on(void)
 213 {
 214     /* Initialisation the display the same way as the original firmware */
 215
 216     lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
 217
 218     lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x011b); /* 220 lines, GS=0, SS=1 */
 219
 220     /* B/C = 1: n-line inversion form
 221      * EOR = 1: polarity inversion occurs by applying an EOR to odd/even
 222      *          frame select signal and an n-line inversion signal.
 223      * FLD = 01b: 1 field interlaced scan, external display iface */
 224     lcd_write_reg(R_DRV_WAVEFORM_CONTROL, 0x0700);
 225
 226     /* Address counter updated in horizontal direction; left to right;
 227      * vertical increment horizontal increment.
 228      * data format for 8bit transfer or spi = 65k (5,6,5) */
 229     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 230
 231     /* Replace data on writing to GRAM */
 232     lcd_write_reg(R_COMPARE_REG1, 0);
 233     lcd_write_reg(R_COMPARE_REG2, 0);
 234
 235     lcd_write_reg(R_DISP_CONTROL1, 0x0000 | r_disp_control_rev);  /* GON = 0, DTE = 0, D1-0 = 00b */
 236
 237     /* Front porch lines: 2; Back porch lines: 2; */
 238     lcd_write_reg(R_DISP_CONTROL2, 0x0203);
 239
 240     /* Scan cycle = 0 frames */
 241     lcd_write_reg(R_DISP_CONTROL3, 0x0000);
 242
 243     /* 16 clocks */
 244     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 245
 246     /* 18-bit RGB interface (one transfer/pixel)
 247      * internal clock operation;
 248      * System interface/VSYNC interface */
 249     lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0000);
 250
 251
 252     /* zero everything*/
 253     lcd_write_reg(R_POWER_CONTROL1, 0x0000); /* STB = 0, SLP = 0 */
 254
 255     lcd_delay(10);
 256
 257     /* initialise power supply */
 258
 259     /* DC12-10 = 000b: Step-up1 = clock/8,
 260      * DC02-00 = 000b: Step-up2 = clock/16,
 261      * VC2-0   = 010b: VciOUT = 0.87 * VciLVL */
 262     lcd_write_reg(R_POWER_CONTROL2, 0x0002);
 263
 264     /* VRH3-0 = 1000b: Vreg1OUT = REGP * 1.90 */
 265     lcd_write_reg(R_POWER_CONTROL3, 0x0008);
 266
 267     lcd_delay(40);
 268
 269     lcd_write_reg(R_POWER_CONTROL4, 0x0000); /* VCOMG = 0 */
 270
 271     /* This register is unknown */
 272     lcd_write_reg(0x56, 0x80f);
 273
 274
 275     lcd_write_reg(R_POWER_CONTROL1, 0x4140);
 276
 277     lcd_delay(10);
 278
 279     lcd_write_reg(R_POWER_CONTROL2, 0x0000);
 280     lcd_write_reg(R_POWER_CONTROL3, 0x0013);
 281
 282     lcd_delay(20);
 283
 284     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 285
 286     lcd_delay(20);
 287
 288     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 289
 290     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0002);
 291     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
 292     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0182);
 293     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0203);
 294     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0706);
 295     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0006);
 296     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0706);
 297     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0000);
 298     lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x030f);
 299     lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0f08);
 300
 301
 302     lcd_write_reg(R_GATE_SCAN_POS, 0);
 303     lcd_write_reg(R_VERT_SCROLL_CONTROL, 0);
 304
 305     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 306     lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 307     lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 308
 309     lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 310
 311     display_on=true;  /* must be done before calling lcd_update() */
 312     lcd_update();
 313 }
 314
 315 /* LCD init */
 316 void lcd_init_device(void)
 317 {
 318     ams3525_dbop_init();
 319
 320     /* Init GPIOs the same as the OF */
 321
 322     GPIOA_DIR |= (1<<5);
 323     GPIOA_PIN(5) = 0;
 324
 325     GPIOA_PIN(4) = 0;  /*c80b0040 := 0;*/
 326
 327     lcd_delay(1);
 328
 329     GPIOA_PIN(5) = (1<<5);
 330
 331     lcd_delay(1);
 332
 333     _display_on();
 334 }
 335
 336 #if defined(HAVE_LCD_ENABLE)
 337 void lcd_enable(bool on)
 338 {
 339     if(display_on!=on)
 340     {
 341         if(on)
 342         {
 343             _display_on();
 344             lcd_activation_call_hook();
 345         }
 346         else
 347         {
 348             display_on=false;
 349             lcd_write_reg(R_POWER_CONTROL1, 0x0001);
 350         }
 351     }
 352 }
 353 #endif
 354
 355 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 356 bool lcd_active(void)
 357 {
 358     return display_on;
 359 }
 360
 361 #endif
 362
 363 /*** update functions ***/
 364
 365 static unsigned lcd_yuv_options = 0;
 366
 367 /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
 368 extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
 369                                    int width,
 370                                    int stride);
 371 extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 372                                            int width,
 373                                            int stride,
 374                                            int x_screen, /* To align dither pattern */
 375                                            int y_screen);
 376
 377 void lcd_yuv_set_options(unsigned options)
 378 {
 379     lcd_yuv_options = options;
 380 }
 381
 382 static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
 383 {
 384     if (!display_flipped)
 385     {
 386         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 387         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 388         lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | (LCD_WIDTH-1 - xmin));
 389     }
 390     else
 391     {
 392         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 393         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 394         lcd_write_reg(R_RAM_ADDR_SET,       (ymax << 8) | xmin);
 395     }
 396 }
 397
 398 /* Performance function to blit a YUV bitmap directly to the LCD
 399  * src_x, src_y, width and height should be even
 400  * x, y, width and height have to be within LCD bounds
 401  */
 402 void lcd_blit_yuv(unsigned char * const src[3],
 403                   int src_x, int src_y, int stride,
 404                   int x, int y, int width, int height)
 405 {
 406     unsigned char const * yuv_src[3];
 407     off_t z;
 408
 409     lcd_busy = true;
 410
 411     /* Sorry, but width and height must be >= 2 or else */
 412     width &= ~1;
 413     height >>= 1;
 414
 415     z = stride*src_y;
 416     yuv_src[0] = src[0] + z + src_x;
 417     yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
 418     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 419
 420     if (!display_flipped)
 421     {
 422         lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_NORMAL);
 423     }
 424     else
 425     {
 426         lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_FLIPPED);
 427     }
 428
 429     if (lcd_yuv_options & LCD_YUV_DITHER)
 430     {
 431         do
 432         {
 433             lcd_window_blit(y, x, y+1, x+width-1);
 434
 435             /* Start write to GRAM */
 436             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 437
 438             lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
 439             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 440             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 441             yuv_src[2] += stride >> 1;
 442             y+=2;
 443         }
 444         while (--height > 0);
 445     }
 446     else
 447     {
 448         do
 449         {
 450             lcd_window_blit(y, x, y+1, x+width-1);
 451
 452             /* Start write to GRAM */
 453             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 454
 455             lcd_write_yuv420_lines(yuv_src, width, stride);
 456             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 457             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 458             yuv_src[2] += stride >> 1;
 459             y+=2;
 460         }
 461         while (--height > 0);
 462     }
 463
 464     lcd_busy = false;
 465 }
 466
 467 /* Update the display.
 468    This must be called after all other LCD functions that change the display. */
 469 void lcd_update(void)
 470 {
 471     if (!display_on)
 472         return;
 473
 474     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 475
 476     lcd_busy = true;
 477     /* Set start position and window */
 478     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 479
 480     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 481
 482     lcd_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
 483
 484     lcd_busy = false;
 485 } /* lcd_update */
 486
 487
 488 /* Update a fraction of the display. */
 489 void lcd_update_rect(int x, int y, int width, int height)
 490 {
 491     const fb_data *ptr;
 492     int ymax, xmax;
 493
 494
 495     if (!display_on)
 496         return;
 497
 498     xmax = x + width;
 499     if (xmax >= LCD_WIDTH)
 500         xmax = LCD_WIDTH - 1; /* Clip right */
 501     if (x < 0)
 502         x = 0;                /* Clip left */
 503     if (x >= xmax)
 504         return; /* nothing left to do */
 505
 506     width = xmax - x + 1;     /* Fix width */
 507
 508     ymax = y + height;
 509     if (ymax >= LCD_HEIGHT)
 510         ymax = LCD_HEIGHT - 1; /* Clip bottom */
 511     if (y < 0)
 512         y = 0; /* Clip top */
 513     if (y >= ymax)
 514         return; /* nothing left to do */
 515
 516     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 517     lcd_busy = true;
 518     lcd_window(x, y, xmax, ymax);
 519     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 520
 521     ptr = (fb_data*)&lcd_framebuffer[y][x];
 522
 523     do
 524     {
 525         lcd_write_data(ptr, width);
 526         ptr += LCD_WIDTH;
 527     }
 528     while (++y <= ymax);
 529
 530     lcd_busy = false;
 531 } /* lcd_update_rect */
 532
 533 /* writes one read pixel outside the visible area, needed for correct dbop reads */
 534 bool lcd_button_support(void)
 535 {
 536     fb_data data = (0xf<<12);
 537
 538     if (lcd_busy)
 539         return false;
 540
 541     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 542     /* Set start position and window */
 543     lcd_window(LCD_WIDTH+1, LCD_HEIGHT+1, LCD_WIDTH+2, LCD_HEIGHT+2);
 544
 545     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 546
 547     lcd_write_data(&data, 1);
 548     return true;
 549 }