firmware/target/arm/philips/sa9200/lcd-sa9200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Mark Arigo
  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 #include "cpu.h"
  23 #include "lcd.h"
  24 #include "kernel.h"
  25 #include "system.h"
  26
  27 /* Settings to remember when display is turned off */
  28 static bool invert;
  29 static bool flip;
  30 static int  contrast;
  31
  32 static bool power_on;
  33 static bool display_on;
  34
  35 /* Forward declarations */
  36 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
  37 static void lcd_display_off(void);
  38 #endif
  39
  40 /* The SA9200 controller closely matches the register defines for the
  41    Samsung S6D0151 */
  42 #define R_START_OSC             0x00
  43 #define R_DRV_OUTPUT_CONTROL    0x01
  44 #define R_INVERSION_CONTROL     0x02
  45 #define R_ENTRY_MODE            0x03
  46 #define R_DISP_CONTROL          0x07
  47 #define R_BLANK_PERIOD_CONTROL  0x08
  48 #define R_FRAME_CYCLE_CONTROL   0x0b
  49 #define R_EXT_INTERFACE_CONTROL 0x0c
  50 #define R_POWER_CONTROL1        0x10
  51 #define R_GAMMA_CONTROL1        0x11
  52 #define R_POWER_CONTROL2        0x12
  53 #define R_POWER_CONTROL3        0x13
  54 #define R_POWER_CONTROL4        0x14
  55 #define R_RAM_ADDR_SET          0x21
  56 #define R_WRITE_DATA_2_GRAM     0x22
  57 #define R_RAM_READ_DATA         0x22
  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 #define R_GAMMA_FINE_ADJ_NEG1   0x34
  63 #define R_GAMMA_FINE_ADJ_NEG2   0x35
  64 #define R_GAMMA_FINE_ADJ_NEG3   0x36
  65 #define R_GAMMA_GRAD_ADJ_NEG    0x37
  66 #define R_GAMMA_CONTROL3        0x38
  67 #define R_GATE_SCAN_START_POS   0x40
  68 #define R_1ST_SCR_DRV_POS       0x42
  69 #define R_2ND_SCR_DRV_POS       0x43
  70 #define R_HORIZ_RAM_ADDR_POS    0x44
  71 #define R_VERT_RAM_ADDR_POS     0x45
  72 #define R_OSC_CONTROL           0x61
  73 #define R_LOW_POWER_MODE        0x69
  74 #define R_PRE_DRIVING_PERIOD    0x70
  75 #define R_GATE_OUT_PERIOD_CTRL  0x71
  76 #define R_SOFTWARE_RESET        0x72
  77
  78 /* Display status */
  79 static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
  80
  81 /* wait for LCD */
  82 static inline void lcd_wait_write(void)
  83 {
  84     while (LCD1_CONTROL & LCD1_BUSY_MASK);
  85 }
  86
  87 /* send LCD pixel */
  88 static inline void lcd_send_pixel(unsigned pixel)
  89 {
  90     lcd_wait_write();
  91     *(volatile uint8_t *)&LCD1_DATA = pixel >> 8;
  92     lcd_wait_write();
  93     *(volatile uint8_t *)&LCD1_DATA = pixel;
  94 }
  95
  96 /* send LCD data */
  97 static void lcd_send_data(unsigned data)
  98 {
  99     lcd_wait_write();
 100     LCD1_DATA = data >> 8;
 101     lcd_wait_write();
 102     LCD1_DATA = data & 0xff;
 103 }
 104
 105 /* send LCD command */
 106 static void lcd_send_command(unsigned cmd)
 107 {
 108     lcd_wait_write();
 109     LCD1_CMD = 0;
 110     lcd_wait_write();
 111     LCD1_CMD = cmd;
 112 }
 113
 114 static void lcd_write_reg(unsigned reg, unsigned data)
 115 {
 116     lcd_send_command(reg);
 117     lcd_send_data(data);
 118 }
 119
 120 /* LCD init */
 121 void lcd_init_device(void)
 122 {
 123 #if 0
 124     /* This is done by the OF bootloader, no need to redo */
 125     DEV_INIT1 &= ~0x3000;
 126     DEV_INIT1 = DEV_INIT1;
 127     DEV_INIT2 &= ~0x400;
 128
 129     LCD1_CONTROL = 0x4680;
 130     udelay(1500);
 131     LCD1_CONTROL = 0x4684;
 132
 133     outl(1, 0x70003018);
 134
 135     LCD1_CONTROL &= ~0x200;
 136     LCD1_CONTROL &= ~0x800;
 137     LCD1_CONTROL &= ~0x400;
 138     udelay(30000);
 139 #endif
 140
 141     /* Already on */
 142     power_on = true;
 143     display_on = true;
 144
 145     /* Reset the options */
 146     lcd_set_invert_display(false);
 147     lcd_set_flip(false);
 148     lcd_set_contrast(DEFAULT_CONTRAST_SETTING);
 149 }
 150
 151 #ifdef HAVE_LCD_SLEEP
 152 static void lcd_power_on(void)
 153 {
 154     LCD1_CONTROL |= 0x1;
 155
 156     /** Power ON Sequence **/
 157
 158     /* Start Oscillation */
 159     lcd_write_reg(R_START_OSC, 0x0001);
 160
 161     sleep(HZ/20); /* 50ms or more */
 162
 163     /* DSTB=0, SAP2-0=001, BT2-0=101, DC2-0=000, AP2-0=001, SLP=0, STB=0 */
 164     lcd_write_reg(R_POWER_CONTROL1, 0x0d04);
 165
 166     /* VR1C=0, VRN14-10=10111, VRP14-10=11111 */
 167     lcd_write_reg(R_GAMMA_CONTROL1, 0x171f);
 168
 169     /* SVC3-0=0000, VRH5-4=01 */
 170     lcd_write_reg(R_POWER_CONTROL2, 0x0001);
 171
 172     /* VCMR=1, PON=0, VRH3-0=1101 */
 173     lcd_write_reg(R_POWER_CONTROL3, 0x080d);
 174
 175     /* VDV6-0=0000100, VCOMG=0, VCM6-0=xxxxxxx */
 176     lcd_write_reg(R_POWER_CONTROL4, 0x0400 | contrast);
 177
 178     /* DSTB=0, SAP2-0=010, BT2-0=010, DC2-0=000, AP2-0=010, SLP=0, STB=0 */
 179     lcd_write_reg(R_POWER_CONTROL1, 0x1208);
 180
 181     sleep(HZ/20); /* 50ms or more */
 182
 183     /* VCMR=1, PON=1, VRH3-0=1100 */
 184     lcd_write_reg(R_POWER_CONTROL3, 0x081c);
 185
 186     sleep(HZ/20); /* OF bootlaoder uses 200ms, no delay in OF firmware */
 187
 188     /* Instructions for other mode settings (in register order). */
 189
 190     lcd_write_reg(R_DRV_OUTPUT_CONTROL, flip ? 0x090c : 0x0a0c);
 191
 192     /* FL1-0=10, FDL=0 */
 193     lcd_write_reg(R_INVERSION_CONTROL, 0x0200);
 194
 195     /* BGR=1, MDT1-0=00, I/D1-0=11, AM=0 */
 196     lcd_write_reg(R_ENTRY_MODE, 0x1030);
 197
 198     /* PT1-0=00, SPT=0, GON=0, DTE=0, CL=0, REV=1, D1-0=01 */
 199     lcd_write_reg(R_DISP_CONTROL, 0x0005);
 200
 201     /* FP3-0=0011, BT3-0=1010 */
 202     lcd_write_reg(R_BLANK_PERIOD_CONTROL, 0x030a);
 203
 204     /* DIV1-0=00, RTN3-0=0000 */
 205     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 206
 207     /* RM=0, DM1-0=00, RIM1-0=00 */
 208     lcd_write_reg(R_EXT_INTERFACE_CONTROL, 0x0000);
 209
 210     /* PKP1=0x0, PKP0=0x0 */
 211     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0000);
 212
 213     /* PKP3=0x2, PKP2=0x4 */
 214     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0204);
 215
 216     /* PKP5=0x0, PKP4=0x1 */
 217     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0001);
 218
 219     /* PRP1=0x6, PRP0=0x0 */
 220     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0600);
 221
 222     /* PKN1=0x6, PKN0=0x7 */
 223     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0607);
 224
 225     /* PKN3=0x3, PKN2=0x5 */
 226     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0305);
 227
 228     /* PKN5=0x7, PKN4=0x7 */
 229     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0707);
 230
 231     /* PRN1=0x0, PRN0=0x6 */
 232     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0006);
 233
 234     /* VRN0=0x4, VRP=0x0 */
 235     lcd_write_reg(R_GAMMA_CONTROL3, 0x0400);
 236
 237     /* SCN=0x0 */
 238     lcd_write_reg(R_GATE_SCAN_START_POS, 0x0000);
 239
 240     /* SE1=LCD_HEIGHT-1, SS1=0x0 */
 241     lcd_write_reg(R_1ST_SCR_DRV_POS, 0x9f00);
 242
 243     /* SE2=0x0, SS2=0x0 */
 244     lcd_write_reg(R_2ND_SCR_DRV_POS, 0x0000);
 245
 246     /* HEA=LCD_WIDTH-1, HSA=0x0 */
 247     lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0x7f00);
 248
 249     /* VEA=LCD_HEIGHT-1, VSA=0x0 */
 250     lcd_write_reg(R_VERT_RAM_ADDR_POS, 0x9f00);
 251
 252     /* Unknown registers */
 253     lcd_write_reg(0x00a8, 0x0125);
 254     lcd_write_reg(0x00a9, 0x0014);
 255     lcd_write_reg(0x00a7, 0x0022);
 256
 257     power_on = true;
 258 }
 259
 260 static void lcd_power_off(void)
 261 {
 262     /* Display must be off first */
 263     if (display_on)
 264         lcd_display_off();
 265
 266     power_on = false;
 267
 268     /** Power OFF sequence **/
 269
 270     /* DSTB=0, SAP2-0=000, BT2-0=001, DC2-0=000, AP2-0=000, SLP=0, STB=0 */
 271     lcd_write_reg(R_POWER_CONTROL1, 0x0100);
 272
 273     /* VCMR=1, PON=0, VRH3-0=1101 */
 274     lcd_write_reg(R_POWER_CONTROL3, 0x080d);
 275 }
 276
 277 void lcd_sleep(void)
 278 {
 279     if (power_on)
 280         lcd_power_off();
 281
 282     /* Set standby mode */
 283
 284     /* PT1-0=00, SPT=0, GON=1, DTE=1, CL=0, REV=1, D1-0=10 */
 285     lcd_write_reg(R_DISP_CONTROL, 0x0036);
 286
 287     /* DSTB=0, SAP2-0=000, BT2-0=101, DC2-0=000, AP2-0=000, SLP=0, STB=1 */
 288     lcd_write_reg(R_POWER_CONTROL1, 0x0501);
 289
 290     LCD1_CONTROL &= ~0xffff0001;
 291 }
 292 #endif
 293
 294 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 295 static void lcd_display_off(void)
 296 {
 297     display_on = false;
 298
 299     /** Display OFF sequence **/
 300
 301     /* PT1-0=10, SPT=0, GON=1, DTE=1, CL=0, REV=1, D1-0=10 */
 302     lcd_write_reg(R_DISP_CONTROL, 0x1036);
 303
 304     sleep(HZ/25); /* 2 or more frames */
 305
 306     /* PT1-0=10, SPT=0, GON=1, DTE=0, CL=0, REV=1, D1-0=00 */
 307     lcd_write_reg(R_DISP_CONTROL, 0x1034);
 308
 309     sleep(HZ/500); /* 1ms or more */
 310
 311     /* PT1-0=10, SPT=0, GON=0, DTE=0, CL=0, REV=1, D1-0=00 */
 312     lcd_write_reg(R_DISP_CONTROL, 0x1004);
 313
 314     sleep(HZ/25); /* 2 or more frames */
 315 }
 316 #endif
 317
 318 #if defined(HAVE_LCD_ENABLE)
 319 static void lcd_display_on(void)
 320 {
 321     /* Be sure power is on first */
 322     if (!power_on)
 323         lcd_power_on();
 324
 325     /** Display ON Sequence **/
 326
 327     /* PT1-0=00, SPT=0, GON=1, DTE=0, CL=0, REV=0, D1-0=01 */
 328     lcd_write_reg(R_DISP_CONTROL, 0x0021);
 329
 330     sleep(HZ/500); /* 1ms or more */
 331
 332     /* PT1-0=00, SPT=0, GON=1, DTE=0, CL=0, REV=0, D1-0=11 */
 333     lcd_write_reg(R_DISP_CONTROL, 0x0023);
 334
 335     sleep(HZ/25); /* 2 or more frames */
 336
 337     /* PT1-0=10, SPT=0, GON=1, DTE=1, CL=0, REV=x, D1-0=11 */
 338     lcd_write_reg(R_DISP_CONTROL, invert ? 0x1033 : 0x1037);
 339
 340     display_on = true;
 341 }
 342
 343 void lcd_enable(bool on)
 344 {
 345     if (on == display_on)
 346         return;
 347
 348     if (on)
 349     {
 350         lcd_display_on();
 351         /* Probably out of sync and we don't wanna pepper the code with
 352            lcd_update() calls for this. */
 353         lcd_update();
 354         send_event(LCD_EVENT_ACTIVATION, NULL);
 355     }
 356     else
 357     {
 358         lcd_display_off();
 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 #endif
 369
 370 /*** hardware configuration ***/
 371 int lcd_default_contrast(void)
 372 {
 373     return DEFAULT_CONTRAST_SETTING;
 374 }
 375
 376 void lcd_set_contrast(int val)
 377 {
 378     contrast = val & 0x7f;
 379
 380     if (!display_on)
 381         return;
 382
 383     /* VDV6-0=0000100, VCOMG=0, VCM6-0=xxxxxxx */
 384     lcd_write_reg(R_POWER_CONTROL4, 0x0400 | contrast);
 385 }
 386
 387 void lcd_set_invert_display(bool yesno)
 388 {
 389     invert = yesno;
 390
 391     if (!display_on)
 392         return;
 393
 394     /* PT1-0=10, SPT=0, GON=1, DTE=1, CL=0, REV=x, D1-0=11 */
 395     lcd_write_reg(R_DISP_CONTROL, invert ? 0x1033 : 0x1037);
 396 }
 397
 398 /* turn the display upside down (call lcd_update() afterwards) */
 399 void lcd_set_flip(bool yesno)
 400 {
 401     flip = yesno;
 402
 403     if (!display_on)
 404         return;
 405
 406     /* DPL=0, EPL=1, SM=0, GS=x, SS=x, NL4-0=01100 */
 407     lcd_write_reg(R_DRV_OUTPUT_CONTROL, flip ? 0x090c : 0x0a0c);
 408 }
 409
 410 void lcd_yuv_set_options(unsigned options)
 411 {
 412     lcd_yuv_options = options;
 413 }
 414
 415 /* Performance function to blit a YUV bitmap directly to the LCD */
 416 void lcd_write_yuv420_lines(unsigned char const * const src[3],
 417                             int width,
 418                             int stride);
 419 void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 420                                     int width,
 421                                     int stride,
 422                                     int x_screen,
 423                                     int y_screen);
 424 void lcd_blit_yuv(unsigned char * const src[3],
 425                   int src_x, int src_y, int stride,
 426                   int x, int y, int width, int height)
 427 {
 428     const unsigned char *yuv_src[3];
 429     const unsigned char *ysrc_max;
 430     int options;
 431
 432     if (!display_on)
 433         return;
 434
 435     width &= ~1;
 436     height &= ~1;
 437
 438     /* calculate the drawing region */
 439     lcd_write_reg(R_VERT_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
 440
 441     /* convert YUV coordinates to screen coordinates */
 442     y = LCD_WIDTH - 1 - y;
 443
 444     /* 2px strip: cursor moves left, then down in gram */
 445     /* BGR=1, MDT1-0=00, I/D1-0=10, AM=0 */
 446     lcd_write_reg(R_ENTRY_MODE, 0x1020);
 447
 448     yuv_src[0] = src[0] + src_y * stride + src_x;
 449     yuv_src[1] = src[1] + (src_y * stride >> 2) + (src_x >> 1);
 450     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 451     ysrc_max = yuv_src[0] + height * stride;
 452
 453     /* cache options setting */
 454     options = lcd_yuv_options;
 455
 456     do
 457     {
 458         /* max horiz << 8 | start horiz */
 459         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (y << 8) | (y - 1));
 460
 461         /* position cursor (set AD0-AD15) */
 462         lcd_write_reg(R_RAM_ADDR_SET, (x << 8) | y);
 463
 464         /* start drawing */
 465         lcd_send_command(R_WRITE_DATA_2_GRAM);
 466
 467         if (options & LCD_YUV_DITHER)
 468         {
 469             lcd_write_yuv420_lines_odither(yuv_src, width, stride,
 470                                            y, x);
 471         }
 472         else
 473         {
 474             lcd_write_yuv420_lines(yuv_src, width, stride);
 475         }
 476
 477         y -= 2; /* move strip by "down" 2 px */
 478         yuv_src[0] += stride << 1;
 479         yuv_src[1] += stride >> 1;
 480         yuv_src[2] += stride >> 1;
 481     }
 482     while (yuv_src[0] < ysrc_max);
 483
 484     /* back to normal right, then down cursor in gram */
 485     /* BGR=1, MDT1-0=00, I/D1-0=11, AM=0 */
 486     lcd_write_reg(R_ENTRY_MODE, 0x1030);
 487 }
 488
 489 /* Update the display.
 490    This must be called after all other LCD functions that change the display. */
 491 void lcd_update(void)
 492 {
 493     const fb_data *addr, *end;
 494
 495     if (!display_on)
 496         return;
 497
 498     addr = FBADDR(0,0);
 499     end = FBADDR(LCD_WIDTH,LCD_HEIGHT - 1);
 500
 501     lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (LCD_WIDTH - 1) << 8);
 502     lcd_write_reg(R_VERT_RAM_ADDR_POS, (LCD_HEIGHT - 1) << 8);
 503     lcd_write_reg(R_RAM_ADDR_SET, 0);
 504     lcd_send_command(R_WRITE_DATA_2_GRAM);
 505
 506     do
 507     {
 508         lcd_send_pixel(*addr++);
 509         lcd_send_pixel(*addr++);
 510     }
 511     while (addr < end);
 512 }
 513
 514 /* Update a fraction of the display. */
 515 void lcd_update_rect(int x, int y, int width, int height)
 516 {
 517     const fb_data *addr;
 518
 519     if (!display_on)
 520         return;
 521
 522     if (x + width > LCD_WIDTH)
 523         width = LCD_WIDTH - x;
 524     if (x < 0)
 525         width += x, x = 0;
 526     if (width <= 0)
 527         return; /* Nothing left to do. */
 528
 529     if (y + height > LCD_HEIGHT)
 530         height = LCD_HEIGHT - y;
 531     if (y < 0)
 532         height += y, y = 0;
 533     if (height <= 0)
 534         return; /* Nothing left to do. */
 535
 536     addr = FBADDR(x,y);
 537
 538     lcd_write_reg(R_HORIZ_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
 539     lcd_write_reg(R_VERT_RAM_ADDR_POS, ((y + height - 1) << 8) | y);
 540     lcd_write_reg(R_RAM_ADDR_SET, (y << 8) | x);
 541     lcd_send_command(R_WRITE_DATA_2_GRAM);
 542
 543     do
 544     {
 545         int w = width - 1;
 546
 547         if (w > 0)
 548         {
 549             do
 550             {
 551                 lcd_send_pixel(*addr++);
 552                 lcd_send_pixel(*addr++);
 553                 w -= 2;
 554             }
 555             while (w > 0);
 556         }
 557
 558         if (w == 0)
 559             lcd_send_pixel(*addr++); /* odd width */
 560
 561         addr += LCD_WIDTH - width;
 562     }
 563     while (--height > 0);
 564 }