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
  40  * updating 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
 117     /* short count, 16bit write, read-timing =8 */
 118     DBOP_CTRL = (1<<18)|(1<<12)|(8<<0);
 119
 120     GPIOB_AFSEL = 0xfc;
 121     GPIOC_AFSEL = 0xff;
 122
 123     DBOP_TIMPOL_23 = 0x6000e;
 124
 125     /* short count,write enable, 16bit write, read-timing =8 */
 126     DBOP_CTRL = (1<<18)|(1<<16)|(1<<12)|(8<<0);
 127     DBOP_TIMPOL_01 = 0x6e167;
 128     DBOP_TIMPOL_23 = 0xa167e06f;
 129
 130     /* TODO: The OF calls some other functions here, but maybe not important */
 131 }
 132
 133
 134 static void lcd_write_cmd(int cmd)
 135 {
 136     /* Write register */
 137     DBOP_CTRL &= ~(1<<14);
 138
 139     DBOP_TIMPOL_23 = 0xa167006e;
 140
 141     DBOP_DOUT = cmd;
 142
 143     /* Wait for fifo to empty */
 144     while ((DBOP_STAT & (1<<10)) == 0);
 145
 146     /* Fuze OF has this loop and it seems to help us now also */
 147     int delay=8;
 148     while(delay--);
 149
 150     DBOP_TIMPOL_23 = 0xa167e06f;
 151 }
 152
 153 void lcd_write_data(const fb_data* p_bytes, int count)
 154 {
 155     while (count--)
 156     {
 157         DBOP_DOUT = *p_bytes++;
 158
 159         /* Wait for fifo to empty */
 160         while ((DBOP_STAT & (1<<10)) == 0);
 161     }
 162 }
 163
 164 static void lcd_write_reg(int reg, int value)
 165 {
 166     fb_data data = value;
 167
 168     lcd_write_cmd(reg);
 169     lcd_write_data(&data, 1);
 170 }
 171
 172 /*** hardware configuration ***/
 173
 174 void lcd_set_contrast(int val)
 175 {
 176     (void)val;
 177 }
 178
 179 void lcd_set_invert_display(bool yesno)
 180 {
 181     r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
 182                                  R_DISP_CONTROL_NORMAL;
 183
 184     if (display_on)
 185     {
 186         lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 187     }
 188
 189 }
 190
 191 /* turn the display upside down  */
 192 void lcd_set_flip(bool yesno)
 193 {
 194     display_flipped = yesno;
 195
 196     r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
 197                            R_ENTRY_MODE_HORZ_NORMAL;
 198 }
 199
 200 static void lcd_window(int xmin, int ymin, int xmax, int ymax)
 201 {
 202     if (!display_flipped)
 203     {
 204         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 205         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 206         lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | xmin);
 207     }
 208     else
 209     {
 210         lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 211             ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 212         lcd_write_reg(R_VERT_RAM_ADDR_POS,
 213             ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_HEIGHT-1 - ymax));
 214         lcd_write_reg(R_RAM_ADDR_SET,
 215             ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_WIDTH-1 - xmin));
 216     }
 217 }
 218
 219 static void _display_on(void)
 220 {
 221     /* Initialisation the display the same way as the original firmware */
 222
 223     lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
 224
 225     lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x011b); /* 220 lines, GS=0, SS=1 */
 226
 227     /* B/C = 1: n-line inversion form
 228      * EOR = 1: polarity inversion occurs by applying an EOR to odd/even
 229      *          frame select signal and an n-line inversion signal.
 230      * FLD = 01b: 1 field interlaced scan, external display iface */
 231     lcd_write_reg(R_DRV_WAVEFORM_CONTROL, 0x0700);
 232
 233     /* Address counter updated in horizontal direction; left to right;
 234      * vertical increment horizontal increment.
 235      * data format for 8bit transfer or spi = 65k (5,6,5) */
 236     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 237
 238     /* Replace data on writing to GRAM */
 239     lcd_write_reg(R_COMPARE_REG1, 0);
 240     lcd_write_reg(R_COMPARE_REG2, 0);
 241
 242     /* GON = 0, DTE = 0, D1-0 = 00b */
 243     lcd_write_reg(R_DISP_CONTROL1, 0x0000 | r_disp_control_rev);
 244
 245     /* Front porch lines: 2; Back porch lines: 2; */
 246     lcd_write_reg(R_DISP_CONTROL2, 0x0203);
 247
 248     /* Scan cycle = 0 frames */
 249     lcd_write_reg(R_DISP_CONTROL3, 0x0000);
 250
 251     /* 16 clocks */
 252     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 253
 254     /* 18-bit RGB interface (one transfer/pixel)
 255      * internal clock operation;
 256      * System interface/VSYNC interface */
 257     lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0000);
 258
 259
 260     /* zero everything*/
 261     lcd_write_reg(R_POWER_CONTROL1, 0x0000); /* STB = 0, SLP = 0 */
 262
 263     lcd_delay(10);
 264
 265     /* initialise power supply */
 266
 267     /* DC12-10 = 000b: Step-up1 = clock/8,
 268      * DC02-00 = 000b: Step-up2 = clock/16,
 269      * VC2-0   = 010b: VciOUT = 0.87 * VciLVL */
 270     lcd_write_reg(R_POWER_CONTROL2, 0x0002);
 271
 272     /* VRH3-0 = 1000b: Vreg1OUT = REGP * 1.90 */
 273     lcd_write_reg(R_POWER_CONTROL3, 0x0008);
 274
 275     lcd_delay(40);
 276
 277     lcd_write_reg(R_POWER_CONTROL4, 0x0000); /* VCOMG = 0 */
 278
 279     /* This register is unknown */
 280     lcd_write_reg(0x56, 0x80f);
 281
 282
 283     lcd_write_reg(R_POWER_CONTROL1, 0x4140);
 284
 285     lcd_delay(10);
 286
 287     lcd_write_reg(R_POWER_CONTROL2, 0x0000);
 288     lcd_write_reg(R_POWER_CONTROL3, 0x0013);
 289
 290     lcd_delay(20);
 291
 292     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 293
 294     lcd_delay(20);
 295
 296     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 297
 298     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0002);
 299     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
 300     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0182);
 301     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0203);
 302     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0706);
 303     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0006);
 304     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0706);
 305     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0000);
 306     lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x030f);
 307     lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0f08);
 308
 309
 310     lcd_write_reg(R_GATE_SCAN_POS, 0);
 311     lcd_write_reg(R_VERT_SCROLL_CONTROL, 0);
 312
 313     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 314     lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 315     lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 316
 317     lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 318
 319     display_on=true;  /* must be done before calling lcd_update() */
 320     lcd_update();
 321 }
 322
 323 /* LCD init */
 324 void lcd_init_device(void)
 325 {
 326     ams3525_dbop_init();
 327
 328     /* Init GPIOs the same as the OF */
 329
 330     GPIOA_DIR |= (1<<5);
 331     GPIOA_PIN(5) = 0;
 332
 333     GPIOA_PIN(4) = 0;  /*c80b0040 := 0;*/
 334
 335     lcd_delay(1);
 336
 337     GPIOA_PIN(5) = (1<<5);
 338
 339     lcd_delay(1);
 340
 341     _display_on();
 342 }
 343
 344 #if defined(HAVE_LCD_ENABLE)
 345 void lcd_enable(bool on)
 346 {
 347     if(display_on!=on)
 348     {
 349         if(on)
 350         {
 351             _display_on();
 352             lcd_activation_call_hook();
 353         }
 354         else
 355         {
 356             display_on=false;
 357             lcd_write_reg(R_POWER_CONTROL1, 0x0001);
 358         }
 359     }
 360 }
 361 #endif
 362
 363 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 364 bool lcd_active(void)
 365 {
 366     return display_on;
 367 }
 368
 369 #endif
 370
 371 /*** update functions ***/
 372
 373 static unsigned lcd_yuv_options = 0;
 374
 375 /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
 376 extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
 377                                    int width,
 378                                    int stride);
 379 extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 380                                    int width,
 381                                    int stride,
 382                                    int x_screen, /* To align dither pattern */
 383                                    int y_screen);
 384
 385 void lcd_yuv_set_options(unsigned options)
 386 {
 387     lcd_yuv_options = options;
 388 }
 389
 390 static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
 391 {
 392     if (!display_flipped)
 393     {
 394         lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 395             ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 396         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 397         lcd_write_reg(R_RAM_ADDR_SET,
 398             (ymin << 8) | (LCD_WIDTH-1 - xmin));
 399     }
 400     else
 401     {
 402         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 403         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 404         lcd_write_reg(R_RAM_ADDR_SET,       (ymax << 8) | xmin);
 405     }
 406 }
 407
 408 /* Performance function to blit a YUV bitmap directly to the LCD
 409  * src_x, src_y, width and height should be even
 410  * x, y, width and height have to be within LCD bounds
 411  */
 412 void lcd_blit_yuv(unsigned char * const src[3],
 413                   int src_x, int src_y, int stride,
 414                   int x, int y, int width, int height)
 415 {
 416     unsigned char const * yuv_src[3];
 417     off_t z;
 418
 419     lcd_busy = true;
 420
 421     /* Sorry, but width and height must be >= 2 or else */
 422     width &= ~1;
 423     height >>= 1;
 424
 425     z = stride*src_y;
 426     yuv_src[0] = src[0] + z + src_x;
 427     yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
 428     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 429
 430     if (!display_flipped)
 431     {
 432         lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_NORMAL);
 433     }
 434     else
 435     {
 436         lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_FLIPPED);
 437     }
 438
 439     if (lcd_yuv_options & LCD_YUV_DITHER)
 440     {
 441         do
 442         {
 443             lcd_window_blit(y, x, y+1, x+width-1);
 444
 445             /* Start write to GRAM */
 446             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 447
 448             lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
 449             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 450             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 451             yuv_src[2] += stride >> 1;
 452             y+=2;
 453         }
 454         while (--height > 0);
 455     }
 456     else
 457     {
 458         do
 459         {
 460             lcd_window_blit(y, x, y+1, x+width-1);
 461
 462             /* Start write to GRAM */
 463             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 464
 465             lcd_write_yuv420_lines(yuv_src, width, stride);
 466             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 467             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 468             yuv_src[2] += stride >> 1;
 469             y+=2;
 470         }
 471         while (--height > 0);
 472     }
 473
 474     lcd_busy = false;
 475 }
 476
 477 /* Update the display.
 478    This must be called after all other LCD functions that change the display. */
 479 void lcd_update(void)
 480 {
 481     if (!display_on)
 482         return;
 483
 484     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 485
 486     lcd_busy = true;
 487     /* Set start position and window */
 488     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 489
 490     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 491
 492     lcd_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
 493
 494     lcd_busy = false;
 495 } /* lcd_update */
 496
 497
 498 /* Update a fraction of the display. */
 499 void lcd_update_rect(int x, int y, int width, int height)
 500 {
 501     const fb_data *ptr;
 502     int ymax, xmax;
 503
 504
 505     if (!display_on)
 506         return;
 507
 508     xmax = x + width;
 509     if (xmax >= LCD_WIDTH)
 510         xmax = LCD_WIDTH - 1; /* Clip right */
 511     if (x < 0)
 512         x = 0;                /* Clip left */
 513     if (x >= xmax)
 514         return; /* nothing left to do */
 515
 516     width = xmax - x + 1;     /* Fix width */
 517
 518     ymax = y + height;
 519     if (ymax >= LCD_HEIGHT)
 520         ymax = LCD_HEIGHT - 1; /* Clip bottom */
 521     if (y < 0)
 522         y = 0; /* Clip top */
 523     if (y >= ymax)
 524         return; /* nothing left to do */
 525
 526     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 527     lcd_busy = true;
 528     lcd_window(x, y, xmax, ymax);
 529     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 530
 531     ptr = (fb_data*)&lcd_framebuffer[y][x];
 532
 533     do
 534     {
 535         lcd_write_data(ptr, width);
 536         ptr += LCD_WIDTH;
 537     }
 538     while (++y <= ymax);
 539
 540     lcd_busy = false;
 541 } /* lcd_update_rect */
 542
 543 /* writes one red pixel outside the visible area, needed for correct
 544  * dbop reads */
 545 bool lcd_button_support(void)
 546 {
 547     fb_data data = (0xf<<12);
 548
 549     if (lcd_busy)
 550         return false;
 551
 552     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 553     /* Set start position and window */
 554     lcd_window(LCD_WIDTH+1, LCD_HEIGHT+1, LCD_WIDTH+2, LCD_HEIGHT+2);
 555
 556     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 557
 558     lcd_write_data(&data, 1);
 559     return true;
 560 }