firmware/target/arm/lcd-c200_c200v2.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 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 "inttypes.h"
  22
  23 #include "config.h"
  24 #include "cpu.h"
  25 #include "lcd.h"
  26 #include "kernel.h"
  27 #include "system.h"
  28 #ifdef SANSA_C200V2
  29 #include "dbop-as3525.h"
  30 #endif
  31
  32 /* Display status */
  33 #if MEMORYSIZE > 2
  34 static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
  35 #endif
  36 static bool is_lcd_enabled = true;
  37
  38 /* LCD command set for Samsung S6B33B2 */
  39
  40 #define R_NOP                  0x00
  41 #define R_OSCILLATION_MODE     0x02
  42 #define R_DRIVER_OUTPUT_MODE   0x10
  43 #define R_DCDC_SET             0x20
  44 #define R_BIAS_SET             0x22
  45 #define R_DCDC_CLOCK_DIV       0x24
  46 #define R_DCDC_AMP_ONOFF       0x26
  47 #define R_TEMP_COMPENSATION    0x28
  48 #define R_CONTRAST_CONTROL1    0x2a
  49 #define R_CONTRAST_CONTROL2    0x2b
  50 #define R_STANDBY_OFF          0x2c
  51 #define R_STANDBY_ON           0x2d
  52 #define R_DDRAM_BURST_OFF      0x2e
  53 #define R_DDRAM_BURST_ON       0x2f
  54 #define R_ADDRESSING_MODE      0x30
  55 #define R_ROW_VECTOR_MODE      0x32
  56 #define R_N_LINE_INVERSION     0x34
  57 #define R_FRAME_FREQ_CONTROL   0x36
  58 #define R_RED_PALETTE          0x38
  59 #define R_GREEN_PALETTE        0x3a
  60 #define R_BLUE_PALETTE         0x3c
  61 #define R_ENTRY_MODE           0x40
  62 #define R_X_ADDR_AREA          0x42
  63 #define R_Y_ADDR_AREA          0x43
  64 #define R_RAM_SKIP_AREA        0x45
  65 #define R_DISPLAY_OFF          0x50
  66 #define R_DISPLAY_ON           0x51
  67 #define R_SPEC_DISPLAY_PATTERN 0x53
  68 #define R_PARTIAL_DISPLAY_MODE 0x55
  69 #define R_PARTIAL_START_LINE   0x56
  70 #define R_PARTIAL_END_LINE     0x57
  71 #define R_AREA_SCROLL_MODE     0x59
  72 #define R_SCROLL_START_LINE    0x5a
  73 #define R_DATA_FORMAT_SELECT   0x60
  74
  75 #if defined(SANSA_C200)
  76 /* wait for LCD */
  77 static inline void lcd_wait_write(void)
  78 {
  79     while (LCD1_CONTROL & LCD1_BUSY_MASK);
  80 }
  81
  82 /* send LCD data */
  83 static void lcd_send_pixel(const fb_data data)
  84 {
  85     lcd_wait_write();
  86     LCD1_DATA = data >> 8;
  87     lcd_wait_write();
  88     LCD1_DATA = data & 0xff;
  89 }
  90
  91 inline void lcd_write_data(const fb_data *data, int width)
  92 {
  93     do {
  94         lcd_send_pixel(*data++);
  95     } while(--width);
  96 }
  97
  98 /* send LCD command */
  99 static void lcd_send_command(unsigned char cmd, unsigned char arg)
 100 {
 101     lcd_wait_write();
 102     LCD1_CMD = cmd;
 103     /* if the argument is 0, we send a NOP (= 0) command */
 104     lcd_wait_write();
 105     LCD1_CMD = arg;
 106 }
 107
 108 static inline void c200v1_lcd_init(void)
 109 {
 110     /* This is from the c200 of bootloader beginning at offset 0xbbf4 */
 111     outl(inl(0x70000010) & ~0xfc000000, 0x70000010);
 112     outl(inl(0x70000010), 0x70000010);
 113
 114     DEV_INIT2 &= ~0x400;
 115     udelay(10000);
 116
 117     LCD1_CONTROL &= ~0x4;
 118     udelay(15);
 119
 120     LCD1_CONTROL |= 0x4;
 121     udelay(10);
 122
 123     LCD1_CONTROL = 0x0084; /* bits (9,10) = 00 -> fastest setting */
 124     udelay(10000);
 125 }
 126
 127 #define lcd_delay(delay) udelay((delay) * 1000)
 128
 129 #elif defined(SANSA_C200V2)
 130
 131 static inline void lcd_delay(int delay)
 132 {   //TUNEME : delay is in milliseconds
 133     delay <<= 14;
 134     while(delay--) ;
 135 }
 136
 137 /* send LCD data */
 138 void lcd_write_data(const fb_data *data, int width)
 139 {
 140     do {
 141         DBOP_DOUT = *data << 8 | *data >> 8;
 142         data++;
 143
 144         /* Wait if push fifo is full */
 145         while ((DBOP_STAT & (1<<6)) != 0);
 146     } while(--width);
 147
 148     /* While push fifo is not empty */
 149     while ((DBOP_STAT & (1<<10)) == 0);
 150 }
 151
 152 /* send LCD command */
 153 static void lcd_send_command(unsigned char cmd, unsigned char val)
 154 {
 155     DBOP_TIMPOL_23 = 0xa167006e;
 156
 157     DBOP_DOUT = cmd | val << 8;
 158
 159     while ((DBOP_STAT & (1<<10)) == 0);
 160
 161     DBOP_TIMPOL_23 = 0xa167e06f;
 162 }
 163
 164 static inline void as3525_dbop_init(void)
 165 {
 166     CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
 167
 168     DBOP_TIMPOL_01 = 0xe167e167;
 169     DBOP_TIMPOL_23 = 0xe167006e;
 170     DBOP_CTRL = 0x40008;
 171
 172     GPIOB_AFSEL = 0xc;
 173     GPIOC_AFSEL = 0xff;
 174
 175     DBOP_TIMPOL_23 = 0x6006e;
 176     DBOP_CTRL = 0x52008;
 177     DBOP_TIMPOL_01 = 0x6e167;
 178     DBOP_TIMPOL_23 = 0xa167e06f;
 179
 180     lcd_delay(20);
 181 }
 182
 183 #endif
 184
 185 /* LCD init */
 186 void lcd_init_device(void)
 187 {
 188 #if defined(SANSA_C200)
 189     c200v1_lcd_init();
 190 #elif defined(SANSA_C200V2)
 191     as3525_dbop_init();
 192 #endif
 193
 194     lcd_send_command(R_STANDBY_OFF, 0);
 195     lcd_delay(20);
 196
 197     lcd_send_command(R_OSCILLATION_MODE, 0x01);
 198     lcd_delay(20);
 199
 200     lcd_send_command(R_DCDC_AMP_ONOFF, 0x01);
 201     lcd_delay(20);
 202
 203     lcd_send_command(R_DCDC_AMP_ONOFF, 0x09);
 204     lcd_delay(20);
 205
 206     lcd_send_command(R_DCDC_AMP_ONOFF, 0x0b);
 207     lcd_delay(20);
 208
 209     lcd_send_command(R_DCDC_AMP_ONOFF, 0x0f);
 210     lcd_delay(20);
 211
 212     lcd_send_command(R_DRIVER_OUTPUT_MODE, 0x07);
 213
 214     lcd_send_command(R_DCDC_SET, 0x03);
 215
 216     lcd_send_command(R_DCDC_CLOCK_DIV, 0x03);
 217
 218     lcd_send_command(R_TEMP_COMPENSATION, 0x01);
 219
 220     lcd_send_command(R_CONTRAST_CONTROL1, 0x55);
 221
 222     lcd_send_command(R_ADDRESSING_MODE, 0x10);
 223
 224     lcd_send_command(R_ROW_VECTOR_MODE, 0x0e);
 225
 226     lcd_send_command(R_N_LINE_INVERSION, 0x0d);
 227
 228     lcd_send_command(R_FRAME_FREQ_CONTROL, 0);
 229
 230     lcd_send_command(R_ENTRY_MODE, 0x82);
 231
 232     /* vertical dimensions */
 233     lcd_send_command(R_Y_ADDR_AREA, 0x1a);      /* y1 + 0x1a */
 234     lcd_send_command(LCD_HEIGHT - 1 + 0x1a, 0); /* y2 + 0x1a */
 235
 236     /* horizontal dimensions */
 237     lcd_send_command(R_X_ADDR_AREA, 0); /* x1 */
 238     lcd_send_command(LCD_WIDTH - 1, 0); /* x2 */
 239
 240     lcd_delay(100);
 241
 242     lcd_send_command(R_DISPLAY_ON, 0);
 243 }
 244
 245 /*** hardware configuration ***/
 246 int lcd_default_contrast(void)
 247 {
 248     return DEFAULT_CONTRAST_SETTING;
 249 }
 250
 251 void lcd_set_contrast(int val)
 252 {
 253     lcd_send_command(R_CONTRAST_CONTROL1, val);
 254 }
 255
 256 void lcd_set_invert_display(bool yesno)
 257 {
 258     /* TODO: Implement lcd_set_invert_display() */
 259     (void)yesno;
 260 }
 261
 262 #if defined(HAVE_LCD_ENABLE)
 263 void lcd_enable(bool yesno)
 264 {
 265     if (yesno == is_lcd_enabled)
 266         return;
 267
 268     if ((is_lcd_enabled = yesno))
 269     {
 270         lcd_send_command(R_STANDBY_OFF, 0);
 271         lcd_send_command(R_DISPLAY_ON, 0);
 272         send_event(LCD_EVENT_ACTIVATION, NULL);
 273     }
 274     else
 275     {
 276         lcd_send_command(R_STANDBY_ON, 0);
 277     }
 278 }
 279 #endif
 280
 281 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 282 bool lcd_active(void)
 283 {
 284     return is_lcd_enabled;
 285 }
 286 #endif
 287
 288
 289 /* turn the display upside down (call lcd_update() afterwards) */
 290 void lcd_set_flip(bool yesno)
 291 {
 292     lcd_send_command(R_DRIVER_OUTPUT_MODE, yesno ? 0x02 : 0x07);
 293 }
 294
 295 /*** update functions ***/
 296
 297 #if MEMORYSIZE > 2  /* not for C200V2 */
 298 void lcd_yuv_set_options(unsigned options)
 299 {
 300     lcd_yuv_options = options;
 301 }
 302
 303 /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
 304 extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
 305                                    int width,
 306                                    int stride);
 307 extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 308                                            int width,
 309                                            int stride,
 310                                            int x_screen, /* To align dither pattern */
 311                                            int y_screen);
 312 /* Performance function to blit a YUV bitmap directly to the LCD */
 313 void lcd_blit_yuv(unsigned char * const src[3],
 314                   int src_x, int src_y, int stride,
 315                   int x, int y, int width, int height)
 316 {
 317     unsigned char const * yuv_src[3];
 318     off_t z;
 319
 320     /* Sorry, but width and height must be >= 2 or else */
 321     width &= ~1;
 322     height >>= 1;
 323
 324     y += 0x1a;
 325
 326     z = stride*src_y;
 327     yuv_src[0] = src[0] + z + src_x;
 328     yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
 329     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 330
 331     lcd_send_command(R_ENTRY_MODE, 0x80);
 332
 333     lcd_send_command(R_X_ADDR_AREA, x);
 334     lcd_send_command(x + width - 1, 0);
 335
 336     if (lcd_yuv_options & LCD_YUV_DITHER)
 337     {
 338         do
 339         {
 340             lcd_send_command(R_Y_ADDR_AREA, y);
 341             lcd_send_command(y + 1, 0);
 342
 343             lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
 344
 345             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 346             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 347             yuv_src[2] += stride >> 1;
 348             y += 2;
 349         }
 350          while (--height > 0);
 351     }
 352     else
 353     {
 354         do
 355         {
 356             lcd_send_command(R_Y_ADDR_AREA, y);
 357             lcd_send_command(y + 1, 0);
 358
 359             lcd_write_yuv420_lines(yuv_src, width, stride);
 360
 361             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 362             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 363             yuv_src[2] += stride >> 1;
 364             y += 2;
 365         }
 366          while (--height > 0);
 367     }
 368 }
 369 #endif /* MEMORYSIZE > 2 */
 370
 371 /* Update the display.
 372    This must be called after all other LCD functions that change the display. */
 373 void lcd_update(void)
 374 {
 375     lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
 376 }
 377
 378 /* Update a fraction of the display. */
 379 void lcd_update_rect(int x, int y, int width, int height)
 380 {
 381     const fb_data *addr;
 382
 383     if (x + width >= LCD_WIDTH)
 384         width = LCD_WIDTH - x;
 385     if (y + height >= LCD_HEIGHT)
 386         height = LCD_HEIGHT - y;
 387
 388     if ((width <= 0) || (height <= 0))
 389         return; /* Nothing left to do. */
 390
 391     addr = &lcd_framebuffer[y][x];
 392
 393     if (width <= 1) {
 394         /* The X end address must be larger than the X start address, so we
 395          * switch to vertical mode for single column updates and set the
 396          * window width to 2 */
 397         lcd_send_command(R_ENTRY_MODE, 0x80);
 398         lcd_send_command(R_X_ADDR_AREA, x);
 399         lcd_send_command(x + 1, 0);
 400     } else {
 401         lcd_send_command(R_ENTRY_MODE, 0x82);
 402         lcd_send_command(R_X_ADDR_AREA, x);
 403         lcd_send_command(x + width - 1, 0);
 404     }
 405
 406     lcd_send_command(R_Y_ADDR_AREA, y + 0x1a);
 407     lcd_send_command(y + height - 1 + 0x1a, 0);
 408
 409     do {
 410         lcd_write_data(addr, width);
 411         addr += LCD_WIDTH;
 412     } while (--height > 0);
 413 }