firmware/target/sh/archos/lcd-archos-bitmap.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
  28 /*** definitions ***/
  29
  30 #define LCD_SET_LOWER_COLUMN_ADDRESS              ((char)0x00)
  31 #define LCD_SET_HIGHER_COLUMN_ADDRESS             ((char)0x10)
  32 #define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
  33 #define LCD_SET_POWER_CONTROL_REGISTER            ((char)0x28)
  34 #define LCD_SET_DISPLAY_START_LINE                ((char)0x40)
  35 #define LCD_SET_CONTRAST_CONTROL_REGISTER         ((char)0x81)
  36 #define LCD_SET_SEGMENT_REMAP                     ((char)0xA0)
  37 #define LCD_SET_LCD_BIAS                          ((char)0xA2)
  38 #define LCD_SET_ENTIRE_DISPLAY_OFF                ((char)0xA4)
  39 #define LCD_SET_ENTIRE_DISPLAY_ON                 ((char)0xA5)
  40 #define LCD_SET_NORMAL_DISPLAY                    ((char)0xA6)
  41 #define LCD_SET_REVERSE_DISPLAY                   ((char)0xA7)
  42 #define LCD_SET_MULTIPLEX_RATIO                   ((char)0xA8)
  43 #define LCD_SET_BIAS_TC_OSC                       ((char)0xA9)
  44 #define LCD_SET_1OVER4_BIAS_RATIO                 ((char)0xAA)
  45 #define LCD_SET_INDICATOR_OFF                     ((char)0xAC)
  46 #define LCD_SET_INDICATOR_ON                      ((char)0xAD)
  47 #define LCD_SET_DISPLAY_OFF                       ((char)0xAE)
  48 #define LCD_SET_DISPLAY_ON                        ((char)0xAF)
  49 #define LCD_SET_PAGE_ADDRESS                      ((char)0xB0)
  50 #define LCD_SET_COM_OUTPUT_SCAN_DIRECTION         ((char)0xC0)
  51 #define LCD_SET_TOTAL_FRAME_PHASES                ((char)0xD2)
  52 #define LCD_SET_DISPLAY_OFFSET                    ((char)0xD3)
  53 #define LCD_SET_READ_MODIFY_WRITE_MODE            ((char)0xE0)
  54 #define LCD_SOFTWARE_RESET                        ((char)0xE2)
  55 #define LCD_NOP                                   ((char)0xE3)
  56 #define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE     ((char)0xEE)
  57
  58 /* LCD command codes */
  59 #define LCD_CNTL_RESET          0xe2    /* Software reset */
  60 #define LCD_CNTL_POWER          0x2f    /* Power control */
  61 #define LCD_CNTL_CONTRAST       0x81    /* Contrast */
  62 #define LCD_CNTL_OUTSCAN        0xc8    /* Output scan direction */
  63 #define LCD_CNTL_SEGREMAP       0xa1    /* Segment remap */
  64 #define LCD_CNTL_DISPON         0xaf    /* Display on */
  65
  66 #define LCD_CNTL_PAGE           0xb0    /* Page address */
  67 #define LCD_CNTL_HIGHCOL        0x10    /* Upper column address */
  68 #define LCD_CNTL_LOWCOL         0x00    /* Lower column address */
  69
  70 /** globals **/
  71
  72 static int xoffset; /* needed for flip */
  73
  74 /*** hardware configuration ***/
  75
  76 int lcd_default_contrast(void)
  77 {
  78     return (HW_MASK & LCD_CONTRAST_BIAS) ? 31 : 49;
  79 }
  80
  81 void lcd_set_contrast(int val)
  82 {
  83     lcd_write_command(LCD_CNTL_CONTRAST);
  84     lcd_write_command(val);
  85 }
  86
  87 void lcd_set_invert_display(bool yesno)
  88 {
  89     if (yesno)
  90         lcd_write_command(LCD_SET_REVERSE_DISPLAY);
  91     else
  92         lcd_write_command(LCD_SET_NORMAL_DISPLAY);
  93 }
  94
  95 /* turn the display upside down (call lcd_update() afterwards) */
  96 void lcd_set_flip(bool yesno)
  97 {
  98 #ifdef HAVE_DISPLAY_FLIPPED
  99     if (!yesno)
 100 #else
 101     if (yesno)
 102 #endif
 103     {
 104         lcd_write_command(LCD_SET_SEGMENT_REMAP);
 105         lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
 106         xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 112 we have */
 107     }
 108     else
 109     {
 110         lcd_write_command(LCD_SET_SEGMENT_REMAP | 0x01);
 111         lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08);
 112         xoffset = 0;
 113     }
 114 }
 115
 116 void lcd_init_device(void)
 117 {
 118     /* Initialize PB0-3 as output pins */
 119     PBCR2 &= 0xff00; /* MD = 00 */
 120     PBIOR |= 0x000f; /* IOR = 1 */
 121
 122     /* inits like the original firmware */
 123     lcd_write_command(LCD_SOFTWARE_RESET);
 124     lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 4);
 125     lcd_write_command(LCD_SET_1OVER4_BIAS_RATIO + 0); /* force 1/4 bias: 0 */
 126     lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7);
 127                /* power control register: op-amp=1, regulator=1, booster=1 */
 128     lcd_write_command(LCD_SET_DISPLAY_ON);
 129     lcd_write_command(LCD_SET_NORMAL_DISPLAY);
 130     lcd_set_flip(false);
 131     lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0);
 132     lcd_set_contrast(lcd_default_contrast());
 133     lcd_write_command(LCD_SET_PAGE_ADDRESS);
 134     lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0);
 135     lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0);
 136
 137     lcd_clear_display();
 138     lcd_update();
 139 }
 140
 141 /*** Update functions ***/
 142
 143 /* Performance function that works with an external buffer
 144    note that by and bheight are in 8-pixel units! */
 145 void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
 146                    int bheight, int stride)
 147 {
 148     /* Copy display bitmap to hardware */
 149     while (bheight--)
 150     {
 151         lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
 152         lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
 153         lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
 154
 155         lcd_write_data(data, width);
 156         data += stride;
 157     }
 158 }
 159
 160 /* Helper function for lcd_grey_phase_blit(). */
 161 void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
 162
 163 /* Performance function that works with an external buffer
 164    note that by and bheight are in 8-pixel units! */
 165 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
 166                          int x, int by, int width, int bheight, int stride)
 167 {
 168     stride <<= 3; /* 8 pixels per block */
 169     while (bheight--)
 170     {
 171         lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
 172         lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
 173         lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
 174
 175         lcd_grey_data(values, phases, width);
 176         values += stride;
 177         phases += stride;
 178     }
 179 }
 180
 181
 182 /* Update the display.
 183    This must be called after all other LCD functions that change the display. */
 184 void lcd_update(void)
 185 {
 186     int y;
 187
 188     /* Copy display bitmap to hardware */
 189     for (y = 0; y < LCD_FBHEIGHT; y++)
 190     {
 191         lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
 192         lcd_write_command (LCD_CNTL_HIGHCOL | ((xoffset >> 4) & 0xf));
 193         lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf));
 194
 195         lcd_write_data (FBADDR(0, y), LCD_WIDTH);
 196     }
 197 }
 198
 199 /* Update a fraction of the display. */
 200 void lcd_update_rect(int x, int y, int width, int height)
 201 {
 202     int ymax;
 203
 204     /* The Y coordinates have to work on even 8 pixel rows */
 205     ymax = (y + height-1) >> 3;
 206     y >>= 3;
 207
 208     if(x + width > LCD_WIDTH)
 209         width = LCD_WIDTH - x;
 210     if (width <= 0)
 211         return; /* nothing left to do, 0 is harmful to lcd_write_data() */
 212     if(ymax >= LCD_FBHEIGHT)
 213         ymax = LCD_FBHEIGHT-1;
 214
 215     /* Copy specified rectange bitmap to hardware */
 216     for (; y <= ymax; y++)
 217     {
 218         lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
 219         lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset) >> 4) & 0xf));
 220         lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
 221
 222         lcd_write_data (FBADDR(x,y), width);
 223     }
 224 }