firmware/target/coldfire/iriver/h100/lcd-h100.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 "system.h"
  24 #include "kernel.h"
  25 #include "lcd.h"
  26
  27 /*** definitions ***/
  28
  29 /* LCD command codes */
  30 #define LCD_CNTL_POWER_CONTROL          0x25
  31 #define LCD_CNTL_VOLTAGE_SELECT         0x2b
  32 #define LCD_CNTL_LINE_INVERT_DRIVE      0x36
  33 #define LCD_CNTL_GRAY_SCALE_PATTERN     0x39
  34 #define LCD_CNTL_TEMP_GRADIENT_SELECT   0x4e
  35 #define LCD_CNTL_OSC_FREQUENCY          0x5f
  36 #define LCD_CNTL_ON_OFF                 0xae
  37 #define LCD_CNTL_OSC_ON_OFF             0xaa
  38 #define LCD_CNTL_OFF_MODE               0xbe
  39 #define LCD_CNTL_REVERSE                0xa6
  40 #define LCD_CNTL_ALL_LIGHTING           0xa4
  41 #define LCD_CNTL_COMMON_OUTPUT_STATUS   0xc4
  42 #define LCD_CNTL_COLUMN_ADDRESS_DIR     0xa0
  43 #define LCD_CNTL_NLINE_ON_OFF           0xe4
  44 #define LCD_CNTL_DISPLAY_MODE           0x66
  45 #define LCD_CNTL_DUTY_SET               0x6d
  46 #define LCD_CNTL_ELECTRONIC_VOLUME      0x81
  47 #define LCD_CNTL_DATA_INPUT_DIR         0x84
  48 #define LCD_CNTL_DISPLAY_START_LINE     0x8a
  49 #define LCD_CNTL_AREA_SCROLL            0x10
  50
  51 #define LCD_CNTL_PAGE                   0xb1
  52 #define LCD_CNTL_COLUMN                 0x13
  53 #define LCD_CNTL_DATA_WRITE             0x1d
  54
  55 /*** shared semi-private declarations ***/
  56 extern const unsigned char lcd_dibits[16] ICONST_ATTR;
  57
  58 /*** hardware configuration ***/
  59 int lcd_default_contrast(void)
  60 {
  61     return DEFAULT_CONTRAST_SETTING;
  62 }
  63
  64 void lcd_set_contrast(int val)
  65 {
  66     /* Keep val in acceptable hw range */
  67     if (val < 0)
  68         val = 0;
  69     else if (val > 127)
  70         val = 127;
  71
  72     lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, val, -1);
  73 }
  74
  75 void lcd_set_invert_display(bool yesno)
  76 {
  77     lcd_write_command(LCD_CNTL_REVERSE | (yesno?1:0));
  78 }
  79
  80 /* turn the display upside down (call lcd_update() afterwards) */
  81 void lcd_set_flip(bool yesno)
  82 {
  83     if (yesno)
  84     {
  85         lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 1);
  86         lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 0);
  87         lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 0);
  88     }
  89     else
  90     {
  91         lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0);
  92         lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1);
  93         lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1);
  94     }
  95 }
  96
  97 void lcd_init_device(void)
  98 {
  99     /* GPO35 is the LCD A0 pin
 100        GPO46 is LCD RESET */
 101     or_l(0x00004008, &GPIO1_OUT);
 102     or_l(0x00004008, &GPIO1_ENABLE);
 103     or_l(0x00004008, &GPIO1_FUNCTION);
 104
 105     /* Reset LCD */
 106     sleep(1);
 107     and_l(~0x00004000, &GPIO1_OUT);
 108     sleep(1);
 109     or_l(0x00004000, &GPIO1_OUT);
 110     sleep(1);
 111
 112     lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0);   /* Normal */
 113     lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1); /* Reverse dir */
 114     lcd_write_command(LCD_CNTL_REVERSE | 0); /* Reverse OFF */
 115     lcd_write_command(LCD_CNTL_ALL_LIGHTING | 0); /* Normal */
 116     lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1);
 117     lcd_write_command(LCD_CNTL_OFF_MODE | 1); /* OFF -> VCC on drivers */
 118     lcd_write_command_ex(LCD_CNTL_VOLTAGE_SELECT, 3, -1);
 119     lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, 0x1c, -1);
 120     lcd_write_command_ex(LCD_CNTL_TEMP_GRADIENT_SELECT, 0, -1);
 121
 122     lcd_write_command_ex(LCD_CNTL_LINE_INVERT_DRIVE, 0x10, -1);
 123     lcd_write_command(LCD_CNTL_NLINE_ON_OFF | 1); /* N-line ON */
 124
 125     lcd_write_command_ex(LCD_CNTL_OSC_FREQUENCY, 3, -1);
 126     lcd_write_command(LCD_CNTL_OSC_ON_OFF | 1); /* Oscillator ON */
 127
 128     lcd_write_command_ex(LCD_CNTL_POWER_CONTROL, 0x16, -1);
 129     sleep(HZ/10);                               /* 100 ms pause */
 130     lcd_write_command_ex(LCD_CNTL_POWER_CONTROL, 0x17, -1);
 131
 132     lcd_write_command_ex(LCD_CNTL_DISPLAY_START_LINE, 0, -1);
 133     lcd_write_command_ex(LCD_CNTL_GRAY_SCALE_PATTERN, 0x43, -1);
 134     lcd_write_command_ex(LCD_CNTL_DISPLAY_MODE, 0, -1); /* Greyscale mode */
 135     lcd_write_command(LCD_CNTL_DATA_INPUT_DIR | 0); /* Column mode */
 136
 137     lcd_update();
 138     lcd_write_command(LCD_CNTL_ON_OFF | 1); /* LCD ON */
 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     const unsigned char *src, *src_end;
 149     unsigned char *dst_u, *dst_l;
 150     static unsigned char upper[LCD_WIDTH] IBSS_ATTR;
 151     static unsigned char lower[LCD_WIDTH] IBSS_ATTR;
 152     unsigned int byte;
 153
 154     by *= 2;
 155
 156     while (bheight--)
 157     {
 158         src = data;
 159         src_end = data + width;
 160         dst_u = upper;
 161         dst_l = lower;
 162         do
 163         {
 164             byte = *src++;
 165             *dst_u++ = lcd_dibits[byte & 0x0F];
 166             byte >>= 4;
 167             *dst_l++ = lcd_dibits[byte & 0x0F];
 168         }
 169         while (src < src_end);
 170
 171         lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1);
 172         lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
 173         lcd_write_command(LCD_CNTL_DATA_WRITE);
 174         lcd_write_data(upper, width);
 175
 176         lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1);
 177         lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
 178         lcd_write_command(LCD_CNTL_DATA_WRITE);
 179         lcd_write_data(lower, width);
 180
 181         data += stride;
 182     }
 183 }
 184
 185 /* Helper function for lcd_grey_phase_blit(). */
 186 void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
 187
 188 /* Performance function that works with an external buffer
 189    note that by and bheight are in 4-pixel units! */
 190 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
 191                          int x, int by, int width, int bheight, int stride)
 192 {
 193     stride <<= 2; /* 4 pixels per block */
 194     while (bheight--)
 195     {
 196         lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1);
 197         lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
 198         lcd_write_command(LCD_CNTL_DATA_WRITE);
 199         lcd_grey_data(values, phases, width);
 200         values += stride;
 201         phases += stride;
 202     }
 203 }
 204
 205 /* Update the display.
 206    This must be called after all other LCD functions that change the display. */
 207 void lcd_update(void) ICODE_ATTR;
 208 void lcd_update(void)
 209 {
 210     int y;
 211
 212     /* Copy display bitmap to hardware */
 213     for (y = 0; y < LCD_FBHEIGHT; y++)
 214     {
 215         lcd_write_command_ex(LCD_CNTL_PAGE, y, -1);
 216         lcd_write_command_ex(LCD_CNTL_COLUMN, 0, -1);
 217
 218         lcd_write_command(LCD_CNTL_DATA_WRITE);
 219         lcd_write_data (FBADDR(0, y), LCD_WIDTH);
 220     }
 221 }
 222
 223 /* Update a fraction of the display. */
 224 void lcd_update_rect(int, int, int, int) ICODE_ATTR;
 225 void lcd_update_rect(int x, int y, int width, int height)
 226 {
 227     int ymax;
 228
 229     /* The Y coordinates have to work on even 8 pixel rows */
 230     ymax = (y + height-1) >> 2;
 231     y >>= 2;
 232
 233     if(x + width > LCD_WIDTH)
 234         width = LCD_WIDTH - x;
 235     if (width <= 0)
 236         return; /* nothing left to do, 0 is harmful to lcd_write_data() */
 237     if(ymax >= LCD_FBHEIGHT)
 238         ymax = LCD_FBHEIGHT-1;
 239
 240     /* Copy specified rectange bitmap to hardware */
 241     for (; y <= ymax; y++)
 242     {
 243         lcd_write_command_ex(LCD_CNTL_PAGE, y, -1);
 244         lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
 245
 246         lcd_write_command(LCD_CNTL_DATA_WRITE);
 247         lcd_write_data (FBADDR(x,y), width);
 248     }
 249 }