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 #define R_ENTRY_MODE_HORZ_NORMAL 0x7030
  79 #define R_ENTRY_MODE_VERT 0x7038
  80 #define R_ENTRY_MODE_SOLID_VERT  0x1038
  81
  82 static inline void lcd_delay(int x)
  83 {
  84     do {
  85         asm volatile ("nop\n");
  86     } while (x--);
  87 }
  88
  89 static void as3525_dbop_init(void)
  90 {
  91     CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
  92
  93     DBOP_TIMPOL_01 = 0xe167e167;
  94     DBOP_TIMPOL_23 = 0xe167006e;
  95
  96     /* short count: 16 | output data width: 16 | readstrobe line */
  97     DBOP_CTRL = (1<<18|1<<12|1<<3);
  98
  99     GPIOB_AFSEL = 0xfc;
 100     GPIOC_AFSEL = 0xff;
 101
 102     DBOP_TIMPOL_23 = 0x6000e;
 103
 104     /* short count: 16|enable write|output data width: 16|read strobe line */
 105     DBOP_CTRL = (1<<18|1<<16|1<<12|1<<3);
 106     DBOP_TIMPOL_01 = 0x6e167;
 107     DBOP_TIMPOL_23 = 0xa167e06f;
 108
 109     /* TODO: The OF calls some other functions here, but maybe not important */
 110 }
 111
 112 static void lcd_write_cmd(short cmd)
 113 {
 114     /* Write register */
 115     DBOP_TIMPOL_23 = 0xa167006e;
 116     dbop_write_data(&cmd, 1);
 117
 118     /* Wait for fifo to empty */
 119     while ((DBOP_STAT & (1<<10)) == 0);
 120
 121     /* Fuze OF has this loop and it seems to help us now also */
 122     int delay = 8;
 123     while(delay--);
 124
 125     DBOP_TIMPOL_23 = 0xa167e06f;
 126 }
 127
 128
 129 static void lcd_write_reg(int reg, int value)
 130 {
 131     unsigned short data = value;
 132
 133     lcd_write_cmd(reg);
 134     dbop_write_data(&data, 1);
 135 }
 136
 137 /*** hardware configuration ***/
 138
 139 void lcd_set_contrast(int val)
 140 {
 141     (void)val;
 142 }
 143
 144 void lcd_set_invert_display(bool yesno)
 145 {
 146     if (display_on)
 147     {
 148         lcd_write_reg(R_DISP_CONTROL1, yesno ? 0x33 : 0x37);
 149     }
 150
 151 }
 152
 153 /* turn the display upside down  */
 154 void lcd_set_flip(bool yesno)
 155 {
 156     lcd_write_reg(R_DRV_OUTPUT_CONTROL, yesno ? 0x21b : 0x11b);
 157 }
 158
 159 static void lcd_window(int xmin, int ymin, int xmax, int ymax)
 160 {
 161     lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 162     lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 163     lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | xmin);
 164 }
 165
 166 static void _display_on(void)
 167 {
 168     /* Initialisation the display the same way as the original firmware */
 169
 170     lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
 171
 172     lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x011b); /* 220 lines, GS=0, SS=1 */
 173
 174     /* B/C = 1: n-line inversion form
 175      * EOR = 1: polarity inversion occurs by applying an EOR to odd/even
 176      *          frame select signal and an n-line inversion signal.
 177      * FLD = 01b: 1 field interlaced scan, external display iface */
 178     lcd_write_reg(R_DRV_WAVEFORM_CONTROL, 0x0700);
 179
 180     /* Address counter updated in horizontal direction; left to right;
 181      * vertical increment horizontal increment.
 182      * data format for 8bit transfer or spi = 65k (5,6,5) */
 183     lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ_NORMAL);
 184
 185     /* Replace data on writing to GRAM */
 186     lcd_write_reg(R_COMPARE_REG1, 0);
 187     lcd_write_reg(R_COMPARE_REG2, 0);
 188
 189     /* GON = 0, DTE = 0, D1-0 = 00b */
 190     lcd_write_reg(R_DISP_CONTROL1, 0x0000);
 191
 192     /* Front porch lines: 2; Back porch lines: 2; */
 193     lcd_write_reg(R_DISP_CONTROL2, 0x0203);
 194
 195     /* Scan cycle = 0 frames */
 196     lcd_write_reg(R_DISP_CONTROL3, 0x0000);
 197
 198     /* 16 clocks */
 199     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 200
 201     /* 18-bit RGB interface (one transfer/pixel)
 202      * internal clock operation;
 203      * System interface/VSYNC interface */
 204     lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0000);
 205
 206
 207     /* zero everything*/
 208     lcd_write_reg(R_POWER_CONTROL1, 0x0000); /* STB = 0, SLP = 0 */
 209
 210     lcd_delay(10);
 211
 212     /* initialise power supply */
 213
 214     /* DC12-10 = 000b: Step-up1 = clock/8,
 215      * DC02-00 = 000b: Step-up2 = clock/16,
 216      * VC2-0   = 010b: VciOUT = 0.87 * VciLVL */
 217     lcd_write_reg(R_POWER_CONTROL2, 0x0002);
 218
 219     /* VRH3-0 = 1000b: Vreg1OUT = REGP * 1.90 */
 220     lcd_write_reg(R_POWER_CONTROL3, 0x0008);
 221
 222     lcd_delay(40);
 223
 224     lcd_write_reg(R_POWER_CONTROL4, 0x0000); /* VCOMG = 0 */
 225
 226     /* This register is unknown */
 227     lcd_write_reg(0x56, 0x80f);
 228
 229
 230     lcd_write_reg(R_POWER_CONTROL1, 0x4140);
 231
 232     lcd_delay(10);
 233
 234     lcd_write_reg(R_POWER_CONTROL2, 0x0000);
 235     lcd_write_reg(R_POWER_CONTROL3, 0x0013);
 236
 237     lcd_delay(20);
 238
 239     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 240
 241     lcd_delay(20);
 242
 243     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 244
 245     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0002);
 246     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
 247     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0182);
 248     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0203);
 249     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0706);
 250     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0006);
 251     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0706);
 252     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0000);
 253     lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x030f);
 254     lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0f08);
 255
 256
 257     lcd_write_reg(R_GATE_SCAN_POS, 0);
 258     lcd_write_reg(R_VERT_SCROLL_CONTROL, 0);
 259
 260     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 261     lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 262     lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 263
 264     lcd_write_reg(R_DISP_CONTROL1, 0x0037);
 265
 266     display_on = true;  /* must be done before calling lcd_update() */
 267     lcd_update();
 268 }
 269
 270 void lcd_init_device(void)
 271 {
 272     as3525_dbop_init();
 273
 274     GPIOA_DIR |= (1<<5);
 275     GPIOA_PIN(5) = 0;
 276     GPIOA_PIN(4) = 0;
 277
 278     lcd_delay(1);
 279     GPIOA_PIN(5) = (1<<5);
 280     lcd_delay(1);
 281
 282     _display_on();
 283 }
 284
 285 #if defined(HAVE_LCD_ENABLE)
 286 void lcd_enable(bool on)
 287 {
 288     if (display_on == on)
 289         return;
 290
 291     if(on)
 292     {
 293         _display_on();
 294         send_event(LCD_EVENT_ACTIVATION, NULL);
 295     }
 296     else
 297     {
 298         display_on = false;
 299         lcd_write_reg(R_POWER_CONTROL1, 0x0001);
 300     }
 301 }
 302 #endif
 303
 304 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 305 bool lcd_active(void)
 306 {
 307     return display_on;
 308 }
 309 #endif
 310
 311 /*** update functions ***/
 312
 313 static unsigned lcd_yuv_options = 0;
 314
 315 void lcd_yuv_set_options(unsigned options)
 316 {
 317     lcd_yuv_options = options;
 318 }
 319
 320
 321 #ifndef BOOTLOADER
 322 static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
 323 {
 324     lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 325         ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 326     lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 327     lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | (LCD_WIDTH-1 - xmin));
 328 }
 329
 330 /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
 331 extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
 332                                    int width,
 333                                    int stride);
 334 extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 335                                    int width,
 336                                    int stride,
 337                                    int x_screen, /* To align dither pattern */
 338                                    int y_screen);
 339
 340 /* Performance function to blit a YUV bitmap directly to the LCD
 341  * src_x, src_y, width and height should be even
 342  * x, y, width and height have to be within LCD bounds
 343  */
 344 void lcd_blit_yuv(unsigned char * const src[3],
 345                   int src_x, int src_y, int stride,
 346                   int x, int y, int width, int height)
 347 {
 348     unsigned char const * yuv_src[3];
 349     off_t z;
 350
 351     /* Sorry, but width and height must be >= 2 or else */
 352     width &= ~1;
 353     height >>= 1;
 354
 355     z = stride*src_y;
 356     yuv_src[0] = src[0] + z + src_x;
 357     yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
 358     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 359
 360     if (lcd_yuv_options & LCD_YUV_DITHER)
 361     {
 362         do
 363         {
 364             lcd_window_blit(y, x, y+1, x+width-1);
 365
 366             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 367
 368             lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
 369             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 370             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 371             yuv_src[2] += stride >> 1;
 372             y += 2;
 373         }
 374         while (--height > 0);
 375     }
 376     else
 377     {
 378         do
 379         {
 380             lcd_window_blit(y, x, y+1, x+width-1);
 381
 382             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 383
 384             lcd_write_yuv420_lines(yuv_src, width, stride);
 385             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 386             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 387             yuv_src[2] += stride >> 1;
 388             y += 2;
 389         }
 390         while (--height > 0);
 391     }
 392 }
 393
 394 #endif
 395
 396
 397 /* Update the display.
 398    This must be called after all other LCD functions that change the display. */
 399 void lcd_update(void)
 400 {
 401     if (!display_on)
 402         return;
 403
 404     lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ_NORMAL);
 405
 406     /* Set start position and window */
 407     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 408
 409     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 410
 411     dbop_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
 412 }
 413
 414 /* Update a fraction of the display. */
 415 void lcd_update_rect(int x, int y, int width, int height)
 416 {
 417     const fb_data *ptr;
 418
 419     if (!display_on)
 420         return;
 421
 422     /* nothing to draw? */
 423     if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) ||
 424         (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0))
 425         return;
 426
 427     if (x < 0)
 428     {   /* clip left */
 429         width += x;
 430         x = 0;
 431     }
 432     if (y < 0)
 433     {   /* clip top */
 434         height += y;
 435         y = 0;
 436     }
 437     if (x + width > LCD_WIDTH)
 438         width = LCD_WIDTH - x; /* clip right */
 439     if (y + height > LCD_HEIGHT)
 440         height = LCD_HEIGHT - y; /* clip bottom */
 441
 442     lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ_NORMAL);
 443
 444     /* we need to make x and width even to enable 32bit transfers */
 445     width = (width + (x & 1) + 1) & ~1;
 446     x &= ~1;
 447
 448     lcd_window(x, y, x+width-1, y+height-1);
 449     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 450
 451     ptr = &lcd_framebuffer[y][x];
 452
 453     do
 454     {
 455         dbop_write_data(ptr, width);
 456         ptr += LCD_WIDTH;
 457     }
 458     while (--height > 0);
 459 }