firmware/target/coldfire/mpio/hd200/lcd-hd200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id:$
   9  *
  10  * Copyright (C) 2010 Marcin Bukat
  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
  22 #include "config.h"
  23
  24 #include "system.h"
  25 #include "kernel.h"
  26 #include "lcd.h"
  27
  28 /*** definitions ***/
  29 /* TOMATO LSI 0350 - definitions and slightly tweaked functions
  30  * taken from lcd-remote-iaudio.c
  31  */
  32
  33 #define LCD_SET_DUTY_RATIO 0x48
  34 #define LCD_SELECT_ADC     0xa0
  35 #define LCD_SELECT_SHL     0xc0
  36 #define LCD_SET_COM0       0x44
  37 #define LCD_OSC_ON         0xab
  38 #define LCD_SELECT_DCDC    0x64
  39 #define LCD_SELECT_RES     0x20
  40 #define LCD_SET_VOLUME     0x81
  41 #define LCD_SET_BIAS       0x50
  42 #define LCD_CONTROL_POWER  0x28
  43 #define LCD_DISPLAY_ON     0xae
  44 #define LCD_SET_INITLINE   0x40
  45 #define LCD_SET_COLUMN     0x10
  46 #define LCD_SET_PAGE       0xb0
  47 #define LCD_SET_GRAY       0x88
  48 #define LCD_SET_PWM_FRC    0x90
  49 #define LCD_SET_POWER_SAVE 0xa8
  50 #define LCD_REVERSE        0xa6
  51 #define LCD_RESET          0xe2
  52
  53 /* cached settings */
  54 static bool cached_invert = false;
  55 static bool cached_flip = false;
  56 static int cached_contrast = DEFAULT_CONTRAST_SETTING;
  57 bool lcd_initialized = false;
  58
  59 /*** hardware configuration ***/
  60 int lcd_default_contrast(void)
  61 {
  62     return DEFAULT_CONTRAST_SETTING;
  63 }
  64
  65 void lcd_powersave(bool on)
  66 {
  67 /* What is the point of having else construct here? */
  68     if(lcd_initialized) {
  69         if (on)
  70             lcd_write_command(LCD_SET_POWER_SAVE | 1);
  71         else
  72             lcd_write_command(LCD_SET_POWER_SAVE | 1);
  73     }
  74 }
  75
  76 void lcd_set_contrast(int val)
  77 {
  78     if (val < MIN_CONTRAST_SETTING)
  79         val = MIN_CONTRAST_SETTING;
  80     else if (val > MAX_CONTRAST_SETTING)
  81         val = MAX_CONTRAST_SETTING;
  82
  83     cached_contrast = val;
  84     if(lcd_initialized)
  85         lcd_write_command_e(LCD_SET_VOLUME, val);
  86 }
  87
  88 void lcd_set_invert_display(bool yesno)
  89 {
  90     cached_invert = yesno;
  91     if(lcd_initialized)
  92         lcd_write_command(LCD_REVERSE | yesno);
  93
  94 }
  95
  96 /* turn the display upside down (call lcd_update() afterwards) */
  97 void lcd_set_flip(bool yesno)
  98 {
  99     cached_flip = yesno;
 100     if(lcd_initialized)
 101     {
 102         if(yesno)
 103         {
 104             lcd_write_command(LCD_SELECT_ADC | 1);
 105             lcd_write_command(LCD_SELECT_SHL | 0);
 106             lcd_write_command_e(LCD_SET_COM0, 0);
 107         }
 108         else
 109         {
 110             lcd_write_command(LCD_SELECT_ADC | 0);
 111             lcd_write_command(LCD_SELECT_SHL | 8);
 112             lcd_write_command_e(LCD_SET_COM0, 0);
 113         }
 114     }
 115
 116 }
 117
 118 void lcd_shutdown(void)
 119 {
 120     /* Set power save -> Power OFF (VDD - VSS) .. that's it */
 121     if (lcd_initialized)
 122         lcd_write_command(LCD_SET_POWER_SAVE | 1);
 123 }
 124
 125 void lcd_init_device(void)
 126 {
 127     and_l(~0x00000800, &GPIO_FUNCTION); /* CS3 line */
 128
 129     /* LCD Reset GPO34 */
 130     or_l(0x00000004, &GPIO1_ENABLE);    /* set as output */
 131     or_l(0x00000004, &GPIO1_FUNCTION);  /* switch to secondary function - GPIO */
 132
 133     and_l(~0x00000004, &GPIO1_OUT);     /* RESET low */
 134     sleep(1);                           /* delay at least 1000 ns */
 135     or_l(0x00000004, &GPIO1_OUT);       /* RESET high */
 136     sleep(1);
 137
 138     /* parameters setup taken from original firmware */
 139     lcd_write_command(LCD_RESET);
 140     lcd_write_command_e(LCD_SET_DUTY_RATIO,0x80); /* 1/128 */
 141     lcd_write_command(LCD_OSC_ON);
 142     lcd_write_command(LCD_SELECT_DCDC | 3); /* DC/DC 6xboost */
 143     lcd_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */
 144     lcd_write_command(LCD_SET_BIAS | 6); /* 1/11 */
 145     lcd_write_command(LCD_SET_PWM_FRC | 6); /* 3FRC + 12PWM */
 146     lcd_write_command_e(LCD_SET_GRAY | 0, 0x00);
 147     lcd_write_command_e(LCD_SET_GRAY | 1, 0x00);
 148     lcd_write_command_e(LCD_SET_GRAY | 2, 0x0c);
 149     lcd_write_command_e(LCD_SET_GRAY | 3, 0x00);
 150     lcd_write_command_e(LCD_SET_GRAY | 4, 0xc4);
 151     lcd_write_command_e(LCD_SET_GRAY | 5, 0x00);
 152     lcd_write_command_e(LCD_SET_GRAY | 6, 0xcc);
 153     lcd_write_command_e(LCD_SET_GRAY | 7, 0x00);
 154
 155     lcd_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */
 156     lcd_write_command(LCD_DISPLAY_ON | 1); /* display on */
 157
 158     /* Ok we are ready */
 159     lcd_initialized = true;
 160
 161     lcd_set_flip(cached_flip);
 162     lcd_set_contrast(cached_contrast);
 163     lcd_set_invert_display(cached_invert);
 164
 165     lcd_update();
 166 }
 167
 168 /* Update the display.
 169    This must be called after all other LCD functions that change the display. */
 170 void lcd_update(void) ICODE_ATTR;
 171 void lcd_update(void)
 172 {
 173    int y;
 174     if(!lcd_initialized)
 175         return;
 176
 177         for(y = 0;y < LCD_FBHEIGHT;y++)
 178         {
 179             lcd_write_command(LCD_SET_PAGE | y);
 180             lcd_write_command_e(LCD_SET_COLUMN, 0);
 181             lcd_write_data(lcd_framebuffer[y], LCD_WIDTH);
 182         }
 183
 184
 185 }
 186
 187 /* Update a fraction of the display. */
 188 void lcd_update_rect(int, int, int, int) ICODE_ATTR;
 189 void lcd_update_rect(int x, int y, int width, int height)
 190 {
 191     int ymax;
 192
 193     if (!lcd_initialized)
 194         return;
 195
 196
 197         /* The Y coordinates have to work on even 8 pixel rows */
 198         ymax = (y + height-1) >> 3;
 199         y >>= 3;
 200
 201         if(x + width > LCD_WIDTH)
 202             width = LCD_WIDTH - x;
 203         if (width <= 0)
 204             return; /* nothing left to do, 0 is harmful to lcd_write_data() */
 205         if(ymax >= LCD_FBHEIGHT)
 206             ymax = LCD_FBHEIGHT-1;
 207
 208         /* Copy specified rectange bitmap to hardware */
 209         for (; y <= ymax; y++)
 210         {
 211             lcd_write_command(LCD_SET_PAGE | y );
 212             lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0x0f);
 213             lcd_write_data (&lcd_framebuffer[y][x], width);
 214         }
 215
 216 }
 217
 218 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
 219                          int x, int by, int width, int bheight, int stride)
 220 {
 221     (void)values;
 222     (void)phases;
 223     (void)x;
 224     (void)by;
 225     (void)width;
 226     (void)bheight;
 227     (void)stride;
 228     /* empty stub */
 229 }
 230
 231 void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
 232                    int bheight, int stride)
 233 {
 234     (void)data;
 235     (void)x;
 236     (void)by;
 237     (void)width;
 238     (void)bheight;
 239     (void)stride;
 240     /* empty stub */
 241 }