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 #define lcd_write_single_data16(value) do {\
 134         DBOP_CTRL &= ~(1<<14|1<<13); \
 135         DBOP_DOUT16 = (fb_data)(value); \
 136     } while(0)
 137
 138 static void lcd_write_cmd(int cmd)
 139 {
 140     /* Write register */
 141     DBOP_TIMPOL_23 = 0xa167006e;
 142     lcd_write_single_data16(cmd);
 143
 144     /* Wait for fifo to empty */
 145     while ((DBOP_STAT & (1<<10)) == 0);
 146
 147     /* Fuze OF has this loop and it seems to help us now also */
 148     int delay=8;
 149     while(delay--);
 150
 151     DBOP_TIMPOL_23 = 0xa167e06f;
 152 }
 153
 154 void lcd_write_data(const fb_data* p_bytes, int count)
 155 {
 156     const long *data;
 157     if ((int)p_bytes & 0x3)
 158     {   /* need to do a single 16bit write beforehand if the address is */
 159         /* not word aligned*/
 160         lcd_write_single_data16(*p_bytes);
 161         count--;p_bytes++;
 162     }
 163     /* from here, 32bit transfers are save */
 164     /* set it to transfer 4*(outputwidth) units at a time, */
 165     /* if bit 12 is set it only does 2 halfwords though */
 166     DBOP_CTRL |= (1<<13|1<<14);
 167     data = (long*)p_bytes;
 168     while (count > 1)
 169     {
 170         DBOP_DOUT32 = *data++;
 171         count -= 2;
 172
 173         /* Wait if push fifo is full */
 174         while ((DBOP_STAT & (1<<6)) != 0);
 175     }
 176     /* While push fifo is not empty */
 177     while ((DBOP_STAT & (1<<10)) == 0);
 178
 179     /* due to the 32bit alignment requirement or uneven count,
 180      * we possibly need to do a 16bit transfer at the end also */
 181     if (count > 0)
 182         lcd_write_single_data16(*(fb_data*)data);
 183 }
 184
 185 static void lcd_write_reg(int reg, int value)
 186 {
 187     fb_data data = value;
 188
 189     lcd_write_cmd(reg);
 190     lcd_write_single_data16(data);
 191 }
 192
 193 /*** hardware configuration ***/
 194
 195 void lcd_set_contrast(int val)
 196 {
 197     (void)val;
 198 }
 199
 200 void lcd_set_invert_display(bool yesno)
 201 {
 202     r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
 203                                  R_DISP_CONTROL_NORMAL;
 204
 205     if (display_on)
 206     {
 207         lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 208     }
 209
 210 }
 211
 212 /* turn the display upside down  */
 213 void lcd_set_flip(bool yesno)
 214 {
 215     display_flipped = yesno;
 216
 217     r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
 218                            R_ENTRY_MODE_HORZ_NORMAL;
 219 }
 220
 221 static void lcd_window(int xmin, int ymin, int xmax, int ymax)
 222 {
 223     if (!display_flipped)
 224     {
 225         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 226         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 227         lcd_write_reg(R_RAM_ADDR_SET,       (ymin << 8) | xmin);
 228     }
 229     else
 230     {
 231         lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 232             ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 233         lcd_write_reg(R_VERT_RAM_ADDR_POS,
 234             ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_HEIGHT-1 - ymax));
 235         lcd_write_reg(R_RAM_ADDR_SET,
 236             ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_WIDTH-1 - xmin));
 237     }
 238 }
 239
 240 static void _display_on(void)
 241 {
 242     /* Initialisation the display the same way as the original firmware */
 243
 244     lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
 245
 246     lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x011b); /* 220 lines, GS=0, SS=1 */
 247
 248     /* B/C = 1: n-line inversion form
 249      * EOR = 1: polarity inversion occurs by applying an EOR to odd/even
 250      *          frame select signal and an n-line inversion signal.
 251      * FLD = 01b: 1 field interlaced scan, external display iface */
 252     lcd_write_reg(R_DRV_WAVEFORM_CONTROL, 0x0700);
 253
 254     /* Address counter updated in horizontal direction; left to right;
 255      * vertical increment horizontal increment.
 256      * data format for 8bit transfer or spi = 65k (5,6,5) */
 257     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 258
 259     /* Replace data on writing to GRAM */
 260     lcd_write_reg(R_COMPARE_REG1, 0);
 261     lcd_write_reg(R_COMPARE_REG2, 0);
 262
 263     /* GON = 0, DTE = 0, D1-0 = 00b */
 264     lcd_write_reg(R_DISP_CONTROL1, 0x0000 | r_disp_control_rev);
 265
 266     /* Front porch lines: 2; Back porch lines: 2; */
 267     lcd_write_reg(R_DISP_CONTROL2, 0x0203);
 268
 269     /* Scan cycle = 0 frames */
 270     lcd_write_reg(R_DISP_CONTROL3, 0x0000);
 271
 272     /* 16 clocks */
 273     lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
 274
 275     /* 18-bit RGB interface (one transfer/pixel)
 276      * internal clock operation;
 277      * System interface/VSYNC interface */
 278     lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0000);
 279
 280
 281     /* zero everything*/
 282     lcd_write_reg(R_POWER_CONTROL1, 0x0000); /* STB = 0, SLP = 0 */
 283
 284     lcd_delay(10);
 285
 286     /* initialise power supply */
 287
 288     /* DC12-10 = 000b: Step-up1 = clock/8,
 289      * DC02-00 = 000b: Step-up2 = clock/16,
 290      * VC2-0   = 010b: VciOUT = 0.87 * VciLVL */
 291     lcd_write_reg(R_POWER_CONTROL2, 0x0002);
 292
 293     /* VRH3-0 = 1000b: Vreg1OUT = REGP * 1.90 */
 294     lcd_write_reg(R_POWER_CONTROL3, 0x0008);
 295
 296     lcd_delay(40);
 297
 298     lcd_write_reg(R_POWER_CONTROL4, 0x0000); /* VCOMG = 0 */
 299
 300     /* This register is unknown */
 301     lcd_write_reg(0x56, 0x80f);
 302
 303
 304     lcd_write_reg(R_POWER_CONTROL1, 0x4140);
 305
 306     lcd_delay(10);
 307
 308     lcd_write_reg(R_POWER_CONTROL2, 0x0000);
 309     lcd_write_reg(R_POWER_CONTROL3, 0x0013);
 310
 311     lcd_delay(20);
 312
 313     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 314
 315     lcd_delay(20);
 316
 317     lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
 318
 319     lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0002);
 320     lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
 321     lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0182);
 322     lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0203);
 323     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0706);
 324     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0006);
 325     lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0706);
 326     lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0000);
 327     lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x030f);
 328     lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0f08);
 329
 330
 331     lcd_write_reg(R_GATE_SCAN_POS, 0);
 332     lcd_write_reg(R_VERT_SCROLL_CONTROL, 0);
 333
 334     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 335     lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 336     lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
 337
 338     lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
 339
 340     display_on=true;  /* must be done before calling lcd_update() */
 341     lcd_update();
 342 }
 343
 344 /* LCD init */
 345 void lcd_init_device(void)
 346 {
 347     ams3525_dbop_init();
 348
 349     /* Init GPIOs the same as the OF */
 350
 351     GPIOA_DIR |= (1<<5);
 352     GPIOA_PIN(5) = 0;
 353
 354     GPIOA_PIN(4) = 0;  /*c80b0040 := 0;*/
 355
 356     lcd_delay(1);
 357
 358     GPIOA_PIN(5) = (1<<5);
 359
 360     lcd_delay(1);
 361
 362     _display_on();
 363 }
 364
 365 #if defined(HAVE_LCD_ENABLE)
 366 void lcd_enable(bool on)
 367 {
 368     if(display_on!=on)
 369     {
 370         if(on)
 371         {
 372             _display_on();
 373             lcd_activation_call_hook();
 374         }
 375         else
 376         {
 377             display_on=false;
 378             lcd_write_reg(R_POWER_CONTROL1, 0x0001);
 379         }
 380     }
 381 }
 382 #endif
 383
 384 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 385 bool lcd_active(void)
 386 {
 387     return display_on;
 388 }
 389
 390 #endif
 391
 392 /*** update functions ***/
 393
 394 static unsigned lcd_yuv_options = 0;
 395
 396 /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
 397 extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
 398                                    int width,
 399                                    int stride);
 400 extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
 401                                    int width,
 402                                    int stride,
 403                                    int x_screen, /* To align dither pattern */
 404                                    int y_screen);
 405
 406 void lcd_yuv_set_options(unsigned options)
 407 {
 408     lcd_yuv_options = options;
 409 }
 410
 411 static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
 412 {
 413     if (!display_flipped)
 414     {
 415         lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
 416             ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
 417         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 418         lcd_write_reg(R_RAM_ADDR_SET,
 419             (ymin << 8) | (LCD_WIDTH-1 - xmin));
 420     }
 421     else
 422     {
 423         lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
 424         lcd_write_reg(R_VERT_RAM_ADDR_POS,  (ymax << 8) | ymin);
 425         lcd_write_reg(R_RAM_ADDR_SET,       (ymax << 8) | xmin);
 426     }
 427 }
 428
 429 /* Performance function to blit a YUV bitmap directly to the LCD
 430  * src_x, src_y, width and height should be even
 431  * x, y, width and height have to be within LCD bounds
 432  */
 433 void lcd_blit_yuv(unsigned char * const src[3],
 434                   int src_x, int src_y, int stride,
 435                   int x, int y, int width, int height)
 436 {
 437     unsigned char const * yuv_src[3];
 438     off_t z;
 439
 440     lcd_busy = true;
 441
 442     /* Sorry, but width and height must be >= 2 or else */
 443     width &= ~1;
 444     height >>= 1;
 445
 446     z = stride*src_y;
 447     yuv_src[0] = src[0] + z + src_x;
 448     yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
 449     yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
 450
 451     if (!display_flipped)
 452     {
 453         lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_NORMAL);
 454     }
 455     else
 456     {
 457         lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_FLIPPED);
 458     }
 459
 460     if (lcd_yuv_options & LCD_YUV_DITHER)
 461     {
 462         do
 463         {
 464             lcd_window_blit(y, x, y+1, x+width-1);
 465
 466             /* Start write to GRAM */
 467             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 468
 469             lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
 470             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 471             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 472             yuv_src[2] += stride >> 1;
 473             y+=2;
 474         }
 475         while (--height > 0);
 476     }
 477     else
 478     {
 479         do
 480         {
 481             lcd_window_blit(y, x, y+1, x+width-1);
 482
 483             /* Start write to GRAM */
 484             lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 485
 486             lcd_write_yuv420_lines(yuv_src, width, stride);
 487             yuv_src[0] += stride << 1; /* Skip down two luma lines */
 488             yuv_src[1] += stride >> 1; /* Skip down one chroma line */
 489             yuv_src[2] += stride >> 1;
 490             y+=2;
 491         }
 492         while (--height > 0);
 493     }
 494
 495     lcd_busy = false;
 496 }
 497
 498 /* Update the display.
 499    This must be called after all other LCD functions that change the display. */
 500 void lcd_update(void)
 501 {
 502     if (!display_on)
 503         return;
 504
 505     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 506
 507     lcd_busy = true;
 508     /* Set start position and window */
 509     lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
 510
 511     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 512
 513     lcd_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
 514
 515     lcd_busy = false;
 516 } /* lcd_update */
 517
 518
 519 /* Update a fraction of the display. */
 520 void lcd_update_rect(int x, int y, int width, int height)
 521 {
 522     const fb_data *ptr;
 523     int ymax, xmax;
 524
 525
 526     if (!display_on)
 527         return;
 528
 529     xmax = x + width;
 530     if (xmax >= LCD_WIDTH)
 531         xmax = LCD_WIDTH - 1; /* Clip right */
 532     if (x < 0)
 533         x = 0;                /* Clip left */
 534     if (x >= xmax)
 535         return; /* nothing left to do */
 536
 537     width = xmax - x + 1;     /* Fix width */
 538
 539     ymax = y + height;
 540     if (ymax >= LCD_HEIGHT)
 541         ymax = LCD_HEIGHT - 1; /* Clip bottom */
 542     if (y < 0)
 543         y = 0; /* Clip top */
 544     if (y >= ymax)
 545         return; /* nothing left to do */
 546
 547     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 548     lcd_busy = true;
 549     lcd_window(x, y, xmax, ymax);
 550     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 551
 552     ptr = (fb_data*)&lcd_framebuffer[y][x];
 553
 554     do
 555     {
 556         lcd_write_data(ptr, width);
 557         ptr += LCD_WIDTH;
 558     }
 559     while (++y <= ymax);
 560
 561     lcd_busy = false;
 562 } /* lcd_update_rect */
 563
 564 /* writes one red pixel outside the visible area, needed for correct
 565  * dbop reads */
 566 bool lcd_button_support(void)
 567 {
 568     fb_data data = (0xf<<12);
 569
 570     if (lcd_busy)
 571         return false;
 572
 573     lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
 574     /* Set start position and window */
 575     lcd_window(LCD_WIDTH+1, LCD_HEIGHT+1, LCD_WIDTH+2, LCD_HEIGHT+2);
 576
 577     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 578
 579     lcd_write_single_data16(data);
 580     return true;
 581 }