firmware/target/arm/lcd-ssd1815.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Alan Korr
  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 "hwcompat.h"
  24 #include "kernel.h"
  25 #include "lcd.h"
  26 #include "system.h"
  27 #include "cpu.h"
  28
  29 /*** definitions ***/
  30
  31 #define LCD_SET_LOWER_COLUMN_ADDRESS              ((char)0x00)
  32 #define LCD_SET_HIGHER_COLUMN_ADDRESS             ((char)0x10)
  33 #define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
  34 #define LCD_SET_POWER_CONTROL_REGISTER            ((char)0x28)
  35 #define LCD_SET_DISPLAY_START_LINE                ((char)0x40)
  36 #define LCD_SET_CONTRAST_CONTROL_REGISTER         ((char)0x81)
  37 #define LCD_SET_SEGMENT_REMAP                     ((char)0xA0)
  38 #define LCD_SET_LCD_BIAS                          ((char)0xA2)
  39 #define LCD_SET_ENTIRE_DISPLAY_OFF                ((char)0xA4)
  40 #define LCD_SET_ENTIRE_DISPLAY_ON                 ((char)0xA5)
  41 #define LCD_SET_NORMAL_DISPLAY                    ((char)0xA6)
  42 #define LCD_SET_REVERSE_DISPLAY                   ((char)0xA7)
  43 #define LCD_SET_MULTIPLEX_RATIO                   ((char)0xA8)
  44 #define LCD_SET_BIAS_TC_OSC                       ((char)0xA9)
  45 #define LCD_SET_1OVER4_BIAS_RATIO                 ((char)0xAA)
  46 #define LCD_SET_INDICATOR_OFF                     ((char)0xAC)
  47 #define LCD_SET_INDICATOR_ON                      ((char)0xAD)
  48 #define LCD_SET_DISPLAY_OFF                       ((char)0xAE)
  49 #define LCD_SET_DISPLAY_ON                        ((char)0xAF)
  50 #define LCD_SET_PAGE_ADDRESS                      ((char)0xB0)
  51 #define LCD_SET_COM_OUTPUT_SCAN_DIRECTION         ((char)0xC0)
  52 #define LCD_SET_TOTAL_FRAME_PHASES                ((char)0xD2)
  53 #define LCD_SET_DISPLAY_OFFSET                    ((char)0xD3)
  54 #define LCD_SET_READ_MODIFY_WRITE_MODE            ((char)0xE0)
  55 #define LCD_SOFTWARE_RESET                        ((char)0xE2)
  56 #define LCD_NOP                                   ((char)0xE3)
  57 #define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE     ((char)0xEE)
  58
  59 /* LCD command codes */
  60 #define LCD_CNTL_RESET          0xe2    /* Software reset */
  61 #define LCD_CNTL_POWER          0x2f    /* Power control */
  62 #define LCD_CNTL_CONTRAST       0x81    /* Contrast */
  63 #define LCD_CNTL_OUTSCAN        0xc8    /* Output scan direction */
  64 #define LCD_CNTL_SEGREMAP       0xa1    /* Segment remap */
  65 #define LCD_CNTL_DISPON         0xaf    /* Display on */
  66
  67 #define LCD_CNTL_PAGE           0xb0    /* Page address */
  68 #define LCD_CNTL_HIGHCOL        0x10    /* Upper column address */
  69 #define LCD_CNTL_LOWCOL         0x00    /* Lower column address */
  70
  71
  72 #if CONFIG_CPU == AS3525
  73 #include "as3525.h"
  74
  75 void lcd_write_command(int byte)
  76 {
  77     DBOP_TIMPOL_23 = 0x6006E;
  78     DBOP_DOUT = byte;
  79
  80     /* While push fifo is not empty */
  81     while ((DBOP_STAT & (1<<10)) == 0)
  82                 ;
  83
  84     DBOP_TIMPOL_23 = 0x6E06F;
  85 }
  86
  87 void lcd_write_data(const fb_data* p_bytes, int count)
  88 {
  89     while (count--)
  90     {
  91         /* Write pixels */
  92         DBOP_DOUT = *p_bytes++;
  93
  94         /* While push fifo is not empty */
  95         while ((DBOP_STAT & (1<<10)) == 0)
  96             ;
  97     }
  98 }
  99
 100 static inline void ams3525_dbop_init(void)
 101 {
 102     int clkdiv = 4 - 1;
 103
 104     CGU_DBOP |= (1<<3) /* clk enable */ | clkdiv /* clkdiv: 3 bits */ ;
 105
 106     GPIOB_AFSEL = 0x0f; /* DBOP on pin 3:0 */
 107     GPIOC_AFSEL = 0xff; /* DBOP on pins 7:0 */
 108
 109     DBOP_CTRL      = 0x50008;
 110     DBOP_TIMPOL_01 = 0xA167E167;
 111     DBOP_TIMPOL_23 = 0x6E06F; /* this value is used for data (pixels) write */
 112 }
 113
 114
 115 /* LCD init, largely based on what OF does */
 116 void lcd_init_device(void)
 117 {
 118     int delay;
 119
 120     ams3525_dbop_init();
 121
 122     GPIOB_DIR |= (1<<4);
 123     GPIOD_DIR |= (1<<1)|(1<<3);
 124
 125     GPIOD_PIN(1) = (1<<1); /* backlight on */
 126
 127     GPIOD_PIN(3) = (1<<3);
 128     delay = 10; while(delay--) ;
 129
 130     GPIOB_PIN(4) = (1<<4);
 131     delay = 10; while(delay--) ;
 132
 133     lcd_write_command(LCD_SET_LCD_BIAS);
 134     lcd_write_command(LCD_SET_SEGMENT_REMAP);
 135     lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
 136     lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO|0x5);
 137     lcd_set_contrast(lcd_default_contrast());
 138     lcd_write_command(LCD_SET_REVERSE_DISPLAY);
 139     lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER|0x7);
 140     lcd_write_command(LCD_SET_DISPLAY_ON);
 141     lcd_write_command(LCD_SET_DISPLAY_START_LINE);
 142     lcd_write_command(LCD_SET_NORMAL_DISPLAY);
 143 }
 144
 145
 146 #elif defined(CPU_TCC77X)
 147
 148 /* TCC77x specific defines */
 149 #define LCD_BASE 0x50000000
 150 #define LCD_CMD   *(volatile unsigned char*)(LCD_BASE)
 151 #define LCD_DATA  *(volatile unsigned char*)(LCD_BASE+1)
 152
 153 void lcd_write_command(int byte)
 154 {
 155     LCD_CMD = byte;
 156
 157     asm volatile (
 158         "nop      \n\t"
 159         "nop      \n\t"
 160         "nop      \n\t"
 161     );
 162 }
 163
 164 void lcd_write_data(const fb_data* p_bytes, int count)
 165 {
 166     while (count--)
 167     {
 168         LCD_DATA = *(p_bytes++);
 169
 170         asm volatile (
 171             "nop      \n\t"
 172             "nop      \n\t"
 173             "nop      \n\t"
 174         );
 175     }
 176 }
 177
 178 /* LCD init */
 179 void lcd_init_device(void)
 180 {
 181     uint32_t bus_width;
 182
 183     /* Telechips init the same as the original firmware */
 184     CSCFG1 &= 0xc3ffc000;
 185     CSCFG1 |= 0x3400101a;
 186     CSCFG1 |= (1 << 21);
 187     CSCFG1 &= ~(1 << 21);
 188
 189     bus_width = ((MCFG >> 11) & 0x3) ^ 3;
 190
 191     CSCFG1 = (bus_width << 28) |
 192              (3 << 26) |                 /* MTYPE = 3 */
 193              ((LCD_BASE >> 28) << 22) |  /* CSBASE = 0x5 */
 194              (1 << 20) |                 /* Unknown */
 195              (3 << 11) |                 /* Setup time = 3 cycles */
 196              (3 << 3) |                  /* Pulse width = 3+1 cycles */
 197              (1 << 0);                   /* Hold time = 1 cycle */
 198
 199     /* SSD1815 inits like the original firmware */
 200     lcd_write_command(LCD_SET_DISPLAY_OFF);
 201     lcd_set_flip(false);
 202     lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO | 5);
 203     lcd_set_contrast(lcd_default_contrast());
 204     lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER | 7);
 205                /* power control register: op-amp=1, regulator=1, booster=1 */
 206     lcd_write_command(LCD_SET_BIAS_TC_OSC);
 207
 208     /* 0xc2 = 110 000 10: Osc. Freq 110 - ???
 209                           TC value 000  - "-0.01%/C (TC0, POR)"
 210                           Bias ratio 10 - "1/9, 1/7 (POR)"
 211      */
 212     lcd_write_command(0xc2);
 213     lcd_write_command(LCD_SET_DISPLAY_ON);
 214
 215     lcd_clear_display();
 216     lcd_update();
 217 }
 218
 219 /* End of TCC77x specific defines */
 220 #endif
 221
 222
 223 /** globals **/
 224
 225 static int xoffset; /* needed for flip */
 226
 227 /*** hardware configuration ***/
 228
 229 int lcd_default_contrast(void)
 230 {
 231     return 0x1f;
 232 }
 233
 234 void lcd_set_contrast(int val)
 235 {
 236     lcd_write_command(LCD_CNTL_CONTRAST);
 237     lcd_write_command(val);
 238 }
 239
 240 void lcd_set_invert_display(bool yesno)
 241 {
 242     if (yesno)
 243         lcd_write_command(LCD_SET_REVERSE_DISPLAY);
 244     else
 245         lcd_write_command(LCD_SET_NORMAL_DISPLAY);
 246 }
 247
 248 /* turn the display upside down (call lcd_update() afterwards) */
 249 void lcd_set_flip(bool yesno)
 250 {
 251     (void)yesno;
 252     /* TODO */
 253 }
 254
 255
 256 /*** Update functions ***/
 257
 258 /* Performance function that works with an external buffer
 259    note that by and bheight are in 8-pixel units! */
 260 void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
 261                    int bheight, int stride)
 262 {
 263     /* Copy display bitmap to hardware */
 264     while (bheight--)
 265     {
 266         lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
 267         lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
 268         lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
 269
 270         lcd_write_data(data, width);
 271         data += stride;
 272     }
 273 }
 274
 275
 276 /* Performance function that works with an external buffer
 277    note that by and bheight are in 8-pixel units! */
 278 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
 279                          int x, int by, int width, int bheight, int stride)
 280 {
 281     (void)values;
 282     (void)phases;
 283     (void)x;
 284     (void)by;
 285     (void)width;
 286     (void)bheight;
 287     (void)stride;
 288 }
 289
 290 /* Update the display.
 291    This must be called after all other LCD functions that change the display. */
 292 void lcd_update(void) ICODE_ATTR;
 293 void lcd_update(void)
 294 {
 295     int y;
 296
 297     /* Copy display bitmap to hardware */
 298     for (y = 0; y < LCD_FBHEIGHT; y++)
 299     {
 300         lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
 301         lcd_write_command (LCD_CNTL_HIGHCOL | ((xoffset >> 4) & 0xf));
 302         lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf));
 303
 304         lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
 305     }
 306 }
 307
 308 /* Update a fraction of the display. */
 309 void lcd_update_rect(int, int, int, int) ICODE_ATTR;
 310 void lcd_update_rect(int x, int y, int width, int height)
 311 {
 312     int ymax;
 313
 314     /* The Y coordinates have to work on even 8 pixel rows */
 315     ymax = (y + height-1) >> 3;
 316     y >>= 3;
 317
 318     if(x + width > LCD_WIDTH)
 319         width = LCD_WIDTH - x;
 320     if (width <= 0)
 321         return; /* nothing left to do, 0 is harmful to lcd_write_data() */
 322     if(ymax >= LCD_FBHEIGHT)
 323         ymax = LCD_FBHEIGHT-1;
 324
 325     /* Copy specified rectange bitmap to hardware */
 326     for (; y <= ymax; y++)
 327     {
 328         lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
 329         lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset) >> 4) & 0xf));
 330         lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
 331
 332         lcd_write_data (&lcd_framebuffer[y][x], width);
 333     }
 334 }