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 data */
  88 static void lcd_send_data(unsigned data)
  89 {
  90     lcd_wait_write();
  91     LCD1_DATA = data >> 8;
  92     lcd_wait_write();
  93     LCD1_DATA = data & 0xff;
  94 }
  95
  96 /* send LCD command */
  97 static void lcd_send_command(unsigned cmd)
  98 {
  99     lcd_wait_write();
 100     LCD1_CMD = cmd >> 8;
 101     lcd_wait_write();
 102     LCD1_CMD = cmd & 0xff;
 103 }
 104
 105 static void lcd_write_reg(unsigned reg, unsigned data)
 106 {
 107     lcd_send_command(reg);
 108     lcd_send_data(data);
 109 }
 110
 111 /* LCD init */
 112 void lcd_init_device(void)
 113 {
 114 #if 0
 115     /* This is done by the OF bootloader, no need to redo */
 116     DEV_INIT1 &= ~0x3000;
 117     DEV_INIT1 = DEV_INIT1;
 118     DEV_INIT2 &= ~0x400;
 119
 120     LCD1_CONTROL = 0x4680;
 121     udelay(1500);
 122     LCD1_CONTROL = 0x4684;
 123
 124     outl(1, 0x70003018);
 125
 126     LCD1_CONTROL &= ~0x200;
 127     LCD1_CONTROL &= ~0x800;
 128     LCD1_CONTROL &= ~0x400;
 129     udelay(30000);
 130 #endif
 131
 132     power_on = true;
 133     display_on = true;
 134     invert = false;
 135     flip = false;
 136     contrast = DEFAULT_CONTRAST_SETTING;
 137 }
 138
 139 #ifdef HAVE_LCD_SLEEP
 140 static void lcd_power_on(void)
 141 {
 142     LCD1_CONTROL |= 0x1;
 143
 144     /** Power ON Sequence **/
 145
 146     /* Start Oscillation */
 147     lcd_write_reg(R_START_OSC, 0x0001);
 148
 149     sleep(HZ/20); /* 50ms or more */
 150
 151     /* DSTB=0, SAP2-0=001, BT2-0=101, DC2-0=000, AP2-0=001, SLP=0, STB=0 */
 152     lcd_write_reg(R_POWER_CONTROL1, 0x0d04);
 153
 154     /* VR1C=0, VRN14-10=10111, VRP14-10=11111 */
 155     lcd_write_reg(R_GAMMA_CONTROL1, 0x171f);
 156
 157     /* SVC3-0=0000, VRH5-4=01 */
 158     lcd_write_reg(R_POWER_CONTROL2, 0x0001);
 159
 160     /* VCMR=1, PON=0, VRH3-0=1101 */
 161     lcd_write_reg(R_POWER_CONTROL3, 0x080d);
 162
 163     /* VDV6-0=0000100, VCOMG=0, VCM6-0=xxxxxxx */
 164     lcd_write_reg(R_POWER_CONTROL4, 0x0400 | contrast);
 165
 166     /* DSTB=0, SAP2-0=010, BT2-0=010, DC2-0=000, AP2-0=010, SLP=0, STB=0 */
 167     lcd_write_reg(R_POWER_CONTROL1, 0x1208);
 168
 169     sleep(HZ/20); /* 50ms or more */
 170
 171     /* VCMR=1, PON=1, VRH3-0=1100 */
 172     lcd_write_reg(R_POWER_CONTROL3, 0x081c);
 173
 174     sleep(HZ/20); /* OF bootlaoder uses 200ms, no delay in OF firmware */
 175
 176     /* Instructions for other mode settings (in register order). */
 177
 178     lcd_write_reg(R_DRV_OUTPUT_CONTROL, flip ? 0x090c : 0x0a0c);
 179
 180     /* FL1-0=10, FDL=0 */
 181     lcd_write_reg(R_INVERSION_CONTROL, 0x0200);
 182
 183     /* BGR=1, MDT1-0=00, I/D1-0=11, AM=0 */
 184     lcd_write_reg(R_ENTRY_MODE, 0x1030);
 185
 186     /* PT1-0=00, SPT=0, GON=0, DTE=0, CL=0, REV=1, D1-0=01 */
 187     lcd_write_reg(R_DISP_CONTROL, 0x0005);
 188
 189     /* FP3-0=0011, BT3-0=1010 */
 190     lcd_write_reg(R_BLANK_PERIOD_CONTROL, 0x030a);
 191
 192     /* DIV1-0=00, RTN3-0=0000 */
 193     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 194
 195     /* RM=0, DM1-0=00, RIM1-0=00 */
 196     lcd_write_reg(R_EXT_INTERFACE_CONTROL, 0x0000);
 197
 198     /* PKP1=0x0, PKP0=0x0 */
 199     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0000);
 200
 201     /* PKP3=0x2, PKP2=0x4 */
 202     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0204);
 203
 204     /* PKP5=0x0, PKP4=0x1 */
 205     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0001);
 206
 207     /* PRP1=0x6, PRP0=0x0 */
 208     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0600);
 209
 210     /* PKN1=0x6, PKN0=0x7 */
 211     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0607);
 212
 213     /* PKN3=0x3, PKN2=0x5 */
 214     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0305);
 215
 216     /* PKN5=0x7, PKN4=0x7 */
 217     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0707);
 218
 219     /* PRN1=0x0, PRN0=0x6 */
 220     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0006);
 221
 222     /* VRN0=0x4, VRP=0x0 */
 223     lcd_write_reg(R_GAMMA_CONTROL3, 0x0400);
 224
 225     /* SCN=0x0 */
 226     lcd_write_reg(R_GATE_SCAN_START_POS, 0x0000);
 227
 228     /* SE1=LCD_HEIGHT-1, SS1=0x0 */
 229     lcd_write_reg(R_1ST_SCR_DRV_POS, 0x9f00);
 230
 231     /* SE2=0x0, SS2=0x0 */
 232     lcd_write_reg(R_2ND_SCR_DRV_POS, 0x0000);
 233
 234     /* HEA=LCD_WIDTH-1, HSA=0x0 */
 235     lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0x7f00);
 236
 237     /* VEA=LCD_HEIGHT-1, VSA=0x0 */
 238     lcd_write_reg(R_VERT_RAM_ADDR_POS, 0x9f00);
 239
 240     /* Unknown registers */
 241     lcd_write_reg(0x00a8, 0x0125);
 242     lcd_write_reg(0x00a9, 0x0014);
 243     lcd_write_reg(0x00a7, 0x0022);
 244
 245     power_on = true;
 246 }
 247
 248 static void lcd_power_off(void)
 249 {
 250     /* Display must be off first */
 251     if (display_on)
 252         lcd_display_off();
 253
 254     power_on = false;
 255
 256     /** Power OFF sequence **/
 257
 258     /* DSTB=0, SAP2-0=000, BT2-0=001, DC2-0=000, AP2-0=000, SLP=0, STB=0 */
 259     lcd_write_reg(R_POWER_CONTROL1, 0x0100);
 260
 261     /* VCMR=1, PON=0, VRH3-0=1101 */
 262     lcd_write_reg(R_POWER_CONTROL3, 0x080d);
 263 }
 264
 265 void lcd_sleep(void)
 266 {
 267     if (power_on)
 268         lcd_power_off();
 269
 270     /* Set standby mode */
 271
 272     /* PT1-0=00, SPT=0, GON=1, DTE=1, CL=0, REV=1, D1-0=10 */
 273     lcd_write_reg(R_DISP_CONTROL, 0x0036);
 274
 275     /* DSTB=0, SAP2-0=000, BT2-0=101, DC2-0=000, AP2-0=000, SLP=0, STB=1 */
 276     lcd_write_reg(R_POWER_CONTROL1, 0x0501);
 277
 278     LCD1_CONTROL &= ~0xffff0001;
 279 }
 280 #endif
 281
 282 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 283 static void lcd_display_off(void)
 284 {
 285     display_on = false;
 286
 287     /** Display OFF sequence **/
 288
 289     /* PT1-0=10, SPT=0, GON=1, DTE=1, CL=0, REV=1, D1-0=10 */
 290     lcd_write_reg(R_DISP_CONTROL, 0x1036);
 291
 292     sleep(HZ/25); /* 2 or more frames */
 293
 294     /* PT1-0=10, SPT=0, GON=1, DTE=0, CL=0, REV=1, D1-0=00 */
 295     lcd_write_reg(R_DISP_CONTROL, 0x1034);
 296
 297     sleep(HZ/500); /* 1ms or more */
 298
 299     /* PT1-0=10, SPT=0, GON=0, DTE=0, CL=0, REV=1, D1-0=00 */
 300     lcd_write_reg(R_DISP_CONTROL, 0x1004);
 301
 302     sleep(HZ/25); /* 2 or more frames */
 303 }
 304 #endif
 305
 306 #if defined(HAVE_LCD_ENABLE)
 307 static void lcd_display_on(void)
 308 {
 309     /* Be sure power is on first */
 310     if (!power_on)
 311         lcd_power_on();
 312
 313     /** Display ON Sequence **/
 314
 315     /* PT1-0=00, SPT=0, GON=1, DTE=0, CL=0, REV=0, D1-0=01 */
 316     lcd_write_reg(R_DISP_CONTROL, 0x0021);
 317
 318     sleep(HZ/500); /* 1ms or more */
 319
 320     /* PT1-0=00, SPT=0, GON=1, DTE=0, CL=0, REV=0, D1-0=11 */
 321     lcd_write_reg(R_DISP_CONTROL, 0x0023);
 322
 323     sleep(HZ/25); /* 2 or more frames */
 324
 325     /* PT1-0=10, SPT=0, GON=1, DTE=1, CL=0, REV=x, D1-0=11 */
 326     lcd_write_reg(R_DISP_CONTROL, invert ? 0x1033 : 0x1037);
 327
 328     display_on = true;
 329 }
 330
 331 void lcd_enable(bool on)
 332 {
 333     if (on == display_on)
 334         return;
 335
 336     if (on)
 337     {
 338         lcd_display_on();
 339         /* Probably out of sync and we don't wanna pepper the code with
 340            lcd_update() calls for this. */
 341         lcd_update();
 342         send_event(LCD_EVENT_ACTIVATION, NULL);
 343     }
 344     else
 345     {
 346         lcd_display_off();
 347     }
 348 }
 349 #endif
 350
 351 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 352 bool lcd_active(void)
 353 {
 354     return display_on;
 355 }
 356 #endif
 357
 358 /*** hardware configuration ***/
 359 int lcd_default_contrast(void)
 360 {
 361     return DEFAULT_CONTRAST_SETTING;
 362 }
 363
 364 void lcd_set_contrast(int val)
 365 {
 366     contrast = val & 0x7f;
 367
 368     if (!display_on)
 369         return;
 370
 371     /* VDV6-0=0000100, VCOMG=0, VCM6-0=xxxxxxx */
 372     lcd_write_reg(R_POWER_CONTROL4, 0x0400 | contrast);
 373 }
 374
 375 void lcd_set_invert_display(bool yesno)
 376 {
 377     invert = yesno;
 378
 379     if (!display_on)
 380         return;
 381
 382     /* PT1-0=10, SPT=0, GON=1, DTE=1, CL=0, REV=x, D1-0=11 */
 383     lcd_write_reg(R_DISP_CONTROL, invert ? 0x1033 : 0x1037);
 384 }
 385
 386 /* turn the display upside down (call lcd_update() afterwards) */
 387 void lcd_set_flip(bool yesno)
 388 {
 389     flip = yesno;
 390
 391     if (!display_on)
 392         return;
 393
 394     /* DPL=0, EPL=1, SM=0, GS=x, SS=x, NL4-0=01100 */
 395     lcd_write_reg(R_DRV_OUTPUT_CONTROL, flip ? 0x090c : 0x0a0c);
 396 }
 397
 398 void lcd_yuv_set_options(unsigned options)
 399 {
 400     lcd_yuv_options = options;
 401 }
 402
 403 /* Performance function to blit a YUV bitmap directly to the LCD */
 404 void lcd_blit_yuv(unsigned char * const src[3],
 405                   int src_x, int src_y, int stride,
 406                   int x, int y, int width, int height)
 407 {
 408     (void)src;
 409     (void)src_x;
 410     (void)src_y;
 411     (void)stride;
 412     (void)x;
 413     (void)y;
 414     (void)width;
 415     (void)height;
 416 }
 417
 418 /* Update the display.
 419    This must be called after all other LCD functions that change the display. */
 420 void lcd_update(void)
 421 {
 422     lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
 423 }
 424
 425 /* Update a fraction of the display. */
 426 void lcd_update_rect(int x, int y, int width, int height)
 427 {
 428     const fb_data *addr;
 429
 430     if (!display_on)
 431         return;
 432
 433     if (x + width > LCD_WIDTH)
 434         width = LCD_WIDTH - x;
 435
 436     if (y + height > LCD_HEIGHT)
 437         height = LCD_HEIGHT - y;
 438
 439     if ((width <= 0) || (height <= 0))
 440         return; /* Nothing left to do. */
 441
 442     addr = &lcd_framebuffer[y][x];
 443
 444     lcd_write_reg(R_HORIZ_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
 445     lcd_write_reg(R_VERT_RAM_ADDR_POS, ((y + height -1) << 8) | y);
 446     lcd_write_reg(R_RAM_ADDR_SET, ((y & 0xff) << 8) | (x & 0xff));
 447     lcd_send_command(R_WRITE_DATA_2_GRAM);
 448
 449     do {
 450         int w = width;
 451         do {
 452             lcd_send_data(*addr++);
 453         } while (--w > 0);
 454         addr += LCD_WIDTH - width;
 455     } while (--height > 0);
 456 }