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 "file.h"
  26 #include "debug.h"
  27 #include "system.h"
  28 #include "clock-target.h"
  29 #include "dbop-as3525.h"
  30
  31 /* The controller is unknown, but some registers appear to be the same as the
  32    HD66789R */
  33 static bool display_on = false; /* is the display turned on? */
  34
  35 /* register defines */
  36 #define R_START_OSC             0x00
  37 #define R_DRV_OUTPUT_CONTROL    0x01
  38 #define R_DRV_WAVEFORM_CONTROL  0x02
  39 #define R_ENTRY_MODE            0x03
  40 #define R_COMPARE_REG1          0x04
  41 #define R_COMPARE_REG2          0x05
  42
  43 #define R_DISP_CONTROL1     0x07
  44 #define R_DISP_CONTROL2     0x08
  45 #define R_DISP_CONTROL3     0x09
  46
  47 #define R_FRAME_CYCLE_CONTROL 0x0b
  48 #define R_EXT_DISP_IF_CONTROL 0x0c
  49
  50 #define R_POWER_CONTROL1    0x10
  51 #define R_POWER_CONTROL2    0x11
  52 #define R_POWER_CONTROL3    0x12
  53 #define R_POWER_CONTROL4    0x13
  54
  55 #define R_RAM_ADDR_SET  0x21
  56 #define R_WRITE_DATA_2_GRAM 0x22
  57
  58 #define R_GAMMA_FINE_ADJ_POS1   0x30
  59 #define R_GAMMA_FINE_ADJ_POS2   0x31
  60 #define R_GAMMA_FINE_ADJ_POS3   0x32
  61 #define R_GAMMA_GRAD_ADJ_POS    0x33
  62
  63 #define R_GAMMA_FINE_ADJ_NEG1   0x34
  64 #define R_GAMMA_FINE_ADJ_NEG2   0x35
  65 #define R_GAMMA_FINE_ADJ_NEG3   0x36
  66 #define R_GAMMA_GRAD_ADJ_NEG    0x37
  67
  68 #define R_GAMMA_AMP_ADJ_RES_POS     0x38
  69 #define R_GAMMA_AMP_AVG_ADJ_RES_NEG 0x39
  70
  71 #define R_GATE_SCAN_POS         0x40
  72 #define R_VERT_SCROLL_CONTROL   0x41
  73 #define R_1ST_SCR_DRV_POS       0x42
  74 #define R_2ND_SCR_DRV_POS       0x43
  75 #define R_HORIZ_RAM_ADDR_POS    0x44
  76 #define R_VERT_RAM_ADDR_POS     0x45
  77
  78 /* Flip Flag */
  79 #define R_ENTRY_MODE_HORZ_NORMAL 0x7030
  80 #define R_ENTRY_MODE_HORZ_FLIPPED 0x7000
  81 static unsigned short r_entry_mode = R_ENTRY_MODE_HORZ_NORMAL;
  82 #define R_ENTRY_MODE_VERT 0x7038
  83 #define R_ENTRY_MODE_SOLID_VERT  0x1038
  84 #define R_ENTRY_MODE_VIDEO_NORMAL 0x7020
  85 #define R_ENTRY_MODE_VIDEO_FLIPPED 0x7010
  86
  87
  88 /* Reverse Flag */
  89 #define R_DISP_CONTROL_NORMAL 0x0004
  90 #define R_DISP_CONTROL_REV    0x0000
  91 static unsigned short r_disp_control_rev = R_DISP_CONTROL_NORMAL;
  92
  93 static inline void lcd_delay(int x)
  94 {
  95     do {
  96         asm volatile ("nop\n");
  97     } while (x--);
  98 }
  99
 100 static void as3525_dbop_init(void)
 101 {
 102     CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
 103
 104     DBOP_TIMPOL_01 = 0xe167e167;
 105     DBOP_TIMPOL_23 = 0xe167006e;
 106
 107     /* short count: 16 | output data width: 16 | readstrobe line */
 108     DBOP_CTRL = (1<<18|1<<12|1<<3);
 109
 110     GPIOB_AFSEL = 0xfc;
 111     GPIOC_AFSEL = 0xff;
 112
 113     DBOP_TIMPOL_23 = 0x6000e;
 114
 115     /* short count: 16|enable write|output data width: 16|read strobe line */
 116     DBOP_CTRL = (1<<18|1<<16|1<<12|1<<3);
 117     DBOP_TIMPOL_01 = 0x6e167;
 118     DBOP_TIMPOL_23 = 0xa167e06f;
 119
 120     /* TODO: The OF calls some other functions here, but maybe not important */
 121 }
 122
 123 static void lcd_write_cmd(short cmd)
 124 {
 125     /* Write register */
 126     DBOP_TIMPOL_23 = 0xa167006e;
 127     dbop_write_data(&cmd, 1);
 128
 129     /* Wait for fifo to empty */
 130     while ((DBOP_STAT & (1<<10)) == 0);
 131
 132     /* Fuze OF has this loop and it seems to help us now also */
 133     int delay = 8;
 134     while(delay--);
 135
 136     DBOP_TIMPOL_23 = 0xa167e06f;
 137 }
 138
 139
 140 static void lcd_write_reg(int reg, int value)
 141 {
 142     unsigned short data = value;
 143
 144     lcd_write_cmd(reg);
 145     dbop_write_data(&data, 1);
 146 }
 147
 148 /*** hardware configuration ***/
 149
 150 void lcd_set_contrast(int val)
 151 {
 152     (void)val;
 153 }
 154
 155 void lcd_set_invert_display(bool yesno)
 156 {
 157     r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
 158                                  R_DISP_CONTROL_NORMAL;
 159
 160     if (display_on)
 161     {
 162         lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 163     }
 164
 165 }
 166
 167 static bool display_flipped = false;
 168
 169 /* turn the display upside down  */
 170 void lcd_set_flip(bool yesno)
 171 {
 172     display_flipped = yesno;
 173
 174     r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
 175                            R_ENTRY_MODE_HORZ_NORMAL;
 176 }
 177
 178 static void lcd_window(int xmin, int ymin, int xmax, int ymax)
 179 {
 180     if (!display_flipped)
 181     {
 182         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 183         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 184         lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | xmin);
 185     }
 186     else
 187     {
 188         lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 189             ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 190         lcd_write_reg(R_VERT_RAM_ADDR_POS,
 191             ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_HEIGHT-1 - ymax));
 192         lcd_write_reg(R_RAM_ADDR_SET,
 193             ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_WIDTH-1 - xmin));
 194     }
 195 }
 196
 197 static void _display_on(void)
 198 {
 199     /* Initialisation the display the same way as the original firmware */
 200
 201     lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
 202
 203     lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x011b); /* 220 lines, GS=0, SS=1 */
 204
 205     /* B/C = 1: n-line inversion form
 206      * EOR = 1: polarity inversion occurs by applying an EOR to odd/even
 207      *          frame select signal and an n-line inversion signal.
 208      * FLD = 01b: 1 field interlaced scan, external display iface */
 209     lcd_write_reg(R_DRV_WAVEFORM_CONTROL, 0x0700);
 210
 211     /* Address counter updated in horizontal direction; left to right;
 212      * vertical increment horizontal increment.
 213      * data format for 8bit transfer or spi = 65k (5,6,5) */
 214     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 215
 216     /* Replace data on writing to GRAM */
 217     lcd_write_reg(R_COMPARE_REG1, 0);
 218     lcd_write_reg(R_COMPARE_REG2, 0);
 219
 220     /* GON = 0, DTE = 0, D1-0 = 00b */
 221     lcd_write_reg(R_DISP_CONTROL1, 0x0000 | r_disp_control_rev);
 222
 223     /* Front porch lines: 2; Back porch lines: 2; */
 224     lcd_write_reg(R_DISP_CONTROL2, 0x0203);
 225
 226     /* Scan cycle = 0 frames */
 227     lcd_write_reg(R_DISP_CONTROL3, 0x0000);
 228
 229     /* 16 clocks */
 230     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 231
 232     /* 18-bit RGB interface (one transfer/pixel)
 233      * internal clock operation;
 234      * System interface/VSYNC interface */
 235     lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0000);
 236
 237
 238     /* zero everything*/
 239     lcd_write_reg(R_POWER_CONTROL1, 0x0000); /* STB = 0, SLP = 0 */
 240
 241     lcd_delay(10);
 242
 243     /* initialise power supply */
 244
 245     /* DC12-10 = 000b: Step-up1 = clock/8,
 246      * DC02-00 = 000b: Step-up2 = clock/16,
 247      * VC2-0   = 010b: VciOUT = 0.87 * VciLVL */
 248     lcd_write_reg(R_POWER_CONTROL2, 0x0002);
 249
 250     /* VRH3-0 = 1000b: Vreg1OUT = REGP * 1.90 */
 251     lcd_write_reg(R_POWER_CONTROL3, 0x0008);
 252
 253     lcd_delay(40);
 254
 255     lcd_write_reg(R_POWER_CONTROL4, 0x0000); /* VCOMG = 0 */
 256
 257     /* This register is unknown */
 258     lcd_write_reg(0x56, 0x80f);
 259
 260
 261     lcd_write_reg(R_POWER_CONTROL1, 0x4140);
 262
 263     lcd_delay(10);
 264
 265     lcd_write_reg(R_POWER_CONTROL2, 0x0000);
 266     lcd_write_reg(R_POWER_CONTROL3, 0x0013);
 267
 268     lcd_delay(20);
 269
 270     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 271
 272     lcd_delay(20);
 273
 274     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 275
 276     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0002);
 277     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
 278     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0182);
 279     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0203);
 280     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0706);
 281     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0006);
 282     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0706);
 283     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0000);
 284     lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x030f);
 285     lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0f08);
 286
 287
 288     lcd_write_reg(R_GATE_SCAN_POS, 0);
 289     lcd_write_reg(R_VERT_SCROLL_CONTROL, 0);
 290
 291     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 292     lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 293     lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 294
 295     lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 296
 297     display_on = true;  /* must be done before calling lcd_update() */
 298     lcd_update();
 299 }
 300
 301 void lcd_init_device(void)
 302 {
 303     as3525_dbop_init();
 304
 305     GPIOA_DIR |= (1<<5);
 306     GPIOA_PIN(5) = 0;
 307     GPIOA_PIN(4) = 0;
 308
 309     lcd_delay(1);
 310     GPIOA_PIN(5) = (1<<5);
 311     lcd_delay(1);
 312
 313     _display_on();
 314 }
 315
 316 #if defined(HAVE_LCD_ENABLE)
 317 void lcd_enable(bool on)
 318 {
 319     if (display_on == on)
 320         return;
 321
 322     if(on)
 323     {
 324         _display_on();
 325         send_event(LCD_EVENT_ACTIVATION, NULL);
 326     }
 327     else
 328     {
 329         display_on = false;
 330         lcd_write_reg(R_POWER_CONTROL1, 0x0001);
 331     }
 332 }
 333 #endif
 334
 335 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 336 bool lcd_active(void)
 337 {
 338     return display_on;
 339 }
 340 #endif
 341
 342 /*** update functions ***/
 343
 344 static unsigned lcd_yuv_options = 0;
 345
 346 void lcd_yuv_set_options(unsigned options)
 347 {
 348     lcd_yuv_options = options;
 349 }
 350
 351
 352 #ifndef BOOTLOADER
 353 static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
 354 {
 355     if (!display_flipped)
 356     {
 357         lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 358             ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 359         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 360         lcd_write_reg(R_RAM_ADDR_SET,
 361             (ymin << 8) | (LCD_WIDTH-1 - xmin));
 362         }
 363         else
 364     {
 365         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 366         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 367         lcd_write_reg(R_RAM_ADDR_SET,       (ymax << 8) | xmin);
 368     }
 369 }
 370
 371 /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
 372 extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
 373                                    int width,
 374                                    int stride);
 375 extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 376                                    int width,
 377                                    int stride,
 378                                    int x_screen, /* To align dither pattern */
 379                                    int y_screen);
 380
 381 /* Performance function to blit a YUV bitmap directly to the LCD
 382  * src_x, src_y, width and height should be even
 383  * x, y, width and height have to be within LCD bounds
 384  */
 385 void lcd_blit_yuv(unsigned char * const src[3],
 386                   int src_x, int src_y, int stride,
 387                   int x, int y, int width, int height)
 388 {
 389     unsigned char const * yuv_src[3];
 390     off_t z;
 391
 392     /* Sorry, but width and height must be >= 2 or else */
 393     width &= ~1;
 394     height >>= 1;
 395
 396     z = stride*src_y;
 397     yuv_src[0] = src[0] + z + src_x;
 398     yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
 399     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 400
 401     lcd_write_reg(R_ENTRY_MODE,
 402         display_flipped ? R_ENTRY_MODE_VIDEO_FLIPPED : R_ENTRY_MODE_VIDEO_NORMAL
 403     );
 404
 405     if (lcd_yuv_options & LCD_YUV_DITHER)
 406     {
 407         do
 408         {
 409             lcd_window_blit(y, x, y+1, x+width-1);
 410
 411             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 412
 413             lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
 414             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 415             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 416             yuv_src[2] += stride >> 1;
 417             y += 2;
 418         }
 419         while (--height > 0);
 420     }
 421     else
 422     {
 423         do
 424         {
 425             lcd_window_blit(y, x, y+1, x+width-1);
 426
 427             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 428
 429             lcd_write_yuv420_lines(yuv_src, width, stride);
 430             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 431             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 432             yuv_src[2] += stride >> 1;
 433             y += 2;
 434         }
 435         while (--height > 0);
 436     }
 437 }
 438
 439 #endif
 440
 441
 442 /* Update the display.
 443    This must be called after all other LCD functions that change the display. */
 444 void lcd_update(void)
 445 {
 446     if (!display_on)
 447         return;
 448
 449     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 450
 451     /* Set start position and window */
 452     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 453
 454     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 455
 456     dbop_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
 457 }
 458
 459 /* Update a fraction of the display. */
 460 void lcd_update_rect(int x, int y, int width, int height)
 461 {
 462     const fb_data *ptr;
 463
 464     if (!display_on)
 465         return;
 466
 467     /* nothing to draw? */
 468     if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) ||
 469         (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0))
 470         return;
 471
 472     if (x < 0)
 473     {   /* clip left */
 474         width += x;
 475         x = 0;
 476     }
 477     if (y < 0)
 478     {   /* clip top */
 479         height += y;
 480         y = 0;
 481     }
 482     if (x + width > LCD_WIDTH)
 483         width = LCD_WIDTH - x; /* clip right */
 484     if (y + height > LCD_HEIGHT)
 485         height = LCD_HEIGHT - y; /* clip bottom */
 486
 487     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 488
 489     /* we need to make x and width even to enable 32bit transfers */
 490     width = (width + (x & 1) + 1) & ~1;
 491     x &= ~1;
 492
 493     lcd_window(x, y, x+width-1, y+height-1);
 494     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 495
 496     ptr = &lcd_framebuffer[y][x];
 497
 498     do
 499     {
 500         dbop_write_data(ptr, width);
 501         ptr += LCD_WIDTH;
 502     }
 503     while (--height > 0);
 504 }