firmware/target/arm/olympus/mrobe-100/lcd-mr100.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Mark Arigo
  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 #include "cpu.h"
  23 #include "lcd.h"
  24 #include "kernel.h"
  25 #include "system.h"
  26
  27 /* The m:robe 100 display has a register set that is very similar to the
  28    Solomon SSD1815 */
  29
  30 /*** definitions ***/
  31
  32 #define LCD_SET_LOWER_COLUMN_ADDRESS              ((char)0x00)
  33 #define LCD_SET_HIGHER_COLUMN_ADDRESS             ((char)0x10)
  34 #define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
  35 #define LCD_SET_POWER_CONTROL_REGISTER            ((char)0x28)
  36 #define LCD_SET_DISPLAY_START_LINE                ((char)0x40)
  37 #define LCD_SET_CONTRAST_CONTROL_REGISTER         ((char)0x81)
  38 #define LCD_SET_SEGMENT_REMAP                     ((char)0xA0)
  39 #define LCD_SET_LCD_BIAS                          ((char)0xA2)
  40 #define LCD_SET_ENTIRE_DISPLAY_OFF                ((char)0xA4)
  41 #define LCD_SET_ENTIRE_DISPLAY_ON                 ((char)0xA5)
  42 #define LCD_SET_NORMAL_DISPLAY                    ((char)0xA6)
  43 #define LCD_SET_REVERSE_DISPLAY                   ((char)0xA7)
  44 #define LCD_SET_MULTIPLEX_RATIO                   ((char)0xA8)
  45 #define LCD_SET_BIAS_TC_OSC                       ((char)0xA9)
  46 #define LCD_SET_1OVER4_BIAS_RATIO                 ((char)0xAA)
  47 #define LCD_SET_INDICATOR_OFF                     ((char)0xAC)
  48 #define LCD_SET_INDICATOR_ON                      ((char)0xAD)
  49 #define LCD_SET_DISPLAY_OFF                       ((char)0xAE)
  50 #define LCD_SET_DISPLAY_ON                        ((char)0xAF)
  51 #define LCD_SET_PAGE_ADDRESS                      ((char)0xB0)
  52 #define LCD_SET_COM_OUTPUT_SCAN_DIRECTION         ((char)0xC0)
  53 #define LCD_SET_TOTAL_FRAME_PHASES                ((char)0xD2)
  54 #define LCD_SET_DISPLAY_OFFSET                    ((char)0xD3)
  55 #define LCD_SET_READ_MODIFY_WRITE_MODE            ((char)0xE0)
  56 #define LCD_SOFTWARE_RESET                        ((char)0xE2)
  57 #define LCD_NOP                                   ((char)0xE3)
  58 #define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE     ((char)0xEE)
  59
  60 /* LCD command codes */
  61
  62 #define LCD_CNTL_RESET          0xe2    /* Software reset */
  63 #define LCD_CNTL_POWER          0x2f    /* Power control */
  64 #define LCD_CNTL_CONTRAST       0x81    /* Contrast */
  65 #define LCD_CNTL_OUTSCAN        0xc8    /* Output scan direction */
  66 #define LCD_CNTL_SEGREMAP       0xa1    /* Segment remap */
  67 #define LCD_CNTL_DISPON         0xaf    /* Display on */
  68
  69 #define LCD_CNTL_PAGE           0xb0    /* Page address */
  70 #define LCD_CNTL_HIGHCOL        0x10    /* Upper column address */
  71 #define LCD_CNTL_LOWCOL         0x00    /* Lower column address */
  72
  73 /* send LCD command */
  74
  75 void lcd_write_command(int byte)
  76 {
  77     while (LCD1_CONTROL & LCD1_BUSY_MASK); /* wait for LCD */
  78     LCD1_CMD = byte;
  79 }
  80
  81 static int xoffset; /* needed for flip */
  82
  83 /*** hardware configuration ***/
  84
  85 int lcd_default_contrast(void)
  86 {
  87     return DEFAULT_CONTRAST_SETTING;
  88 }
  89
  90 void lcd_set_contrast(int val)
  91 {
  92     lcd_write_command(LCD_CNTL_CONTRAST);
  93     lcd_write_command(val);
  94 }
  95
  96 void lcd_set_invert_display(bool yesno)
  97 {
  98     if (yesno)
  99         lcd_write_command(LCD_SET_REVERSE_DISPLAY);
 100     else
 101         lcd_write_command(LCD_SET_NORMAL_DISPLAY);
 102 }
 103
 104 /* turn the display upside down (call lcd_update() afterwards) */
 105 void lcd_set_flip(bool yesno)
 106 {
 107     if (!yesno)
 108     {
 109         /* normal */
 110         lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0xc);
 111         xoffset = 240 - LCD_WIDTH; /* 240 colums minus the 160 we have */
 112     }
 113     else
 114     {
 115         /* upside-down */
 116         lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
 117         xoffset = 0;
 118     }
 119 }
 120
 121 /* LCD init */
 122 void lcd_init_device(void)
 123 {
 124     int i;
 125
 126     DEV_INIT1 &= ~0xfc000000;
 127
 128     i = DEV_INIT1;
 129     DEV_INIT1 = i;
 130
 131     DEV_INIT2 &= ~0x400;
 132     udelay(10000);
 133
 134     LCD1_CONTROL &= ~0x4;
 135     udelay(15);
 136
 137     LCD1_CONTROL |= 0x4;
 138     udelay(10);
 139
 140     LCD1_CONTROL = 0x0094;
 141
 142     /* OF just reads these */
 143     LCD1_CONTROL;
 144     inl(0x70003004);
 145     LCD1_CMD;
 146     inl(0x7000300c);
 147
 148     LCD1_CONTROL |= 0x1;
 149     udelay(15000);
 150
 151     lcd_write_command(LCD_SOFTWARE_RESET);                   /* 0xE2 */
 152     lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7);   /* 0x2F */
 153                /* power control register: op-amp=1, regulator=1, booster=1 */
 154     lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 6); /* 0x26 */
 155
 156     lcd_set_flip(false);                                    /* 0xCC */
 157
 158     lcd_write_command(0xe8);
 159
 160     lcd_set_contrast(lcd_default_contrast());               /* 0x80, 0x00 */
 161
 162     lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0);       /* 0x40 */
 163     lcd_write_command(LCD_SET_NORMAL_DISPLAY);               /* 0xA6 */
 164
 165     lcd_write_command(0x88);
 166
 167     lcd_write_command(LCD_SET_PAGE_ADDRESS);                 /* 0xB0 */
 168     lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0);    /* 0x10 */
 169     lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0);     /* 0x00 */
 170
 171     lcd_write_command(LCD_SET_DISPLAY_ON);                   /* 0xAF */
 172 }
 173
 174 /*** update functions ***/
 175
 176 /* Performance function that works with an external buffer
 177    note that by and bheight are in 8-pixel units! */
 178 void lcd_blit_mono(const unsigned char* data, int x, int by, int width,
 179               int bheight, int stride)
 180 {
 181     int cmd1, cmd2;
 182
 183     cmd1 = LCD_CNTL_HIGHCOL | (((x + xoffset) >> 4) & 0xf);
 184     cmd2 = LCD_CNTL_LOWCOL | ((x + xoffset) & 0xf);
 185
 186     /* Copy display bitmap to hardware */
 187     while (bheight--)
 188     {
 189         lcd_write_command(LCD_CNTL_PAGE | (by++ & 0xff));
 190         lcd_write_command(cmd1);
 191         lcd_write_command(cmd2);
 192
 193         lcd_write_data(data, width);
 194
 195         data += stride;
 196     }
 197 }
 198
 199 /* Helper function for lcd_grey_phase_blit(). */
 200 void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
 201
 202 /* Performance function that works with an external buffer
 203    note that by and bheight are in 8-pixel units! */
 204 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
 205                          int x, int by, int width, int bheight, int stride)
 206 {
 207     int cmd1, cmd2;
 208
 209     stride <<= 3;  /* 8 pixels per block */
 210     cmd1 = LCD_CNTL_HIGHCOL | (((x + xoffset) >> 4) & 0xf);
 211     cmd2 = LCD_CNTL_LOWCOL | ((x + xoffset) & 0xf);
 212
 213     while (bheight--)
 214     {
 215         lcd_write_command(LCD_CNTL_PAGE | (by++ & 0xff));
 216         lcd_write_command(cmd1);
 217         lcd_write_command(cmd2);
 218
 219         lcd_grey_data(values, phases, width);
 220         values += stride;
 221         phases += stride;
 222     }
 223 }
 224
 225 /* Update the display.
 226    This must be called after all other LCD functions that change the display. */
 227 void lcd_update(void) ICODE_ATTR;
 228 void lcd_update(void)
 229 {
 230     int y, cmd1, cmd2;
 231
 232     cmd1 = LCD_CNTL_HIGHCOL | (((xoffset) >> 4) & 0xf);
 233     cmd2 = LCD_CNTL_LOWCOL | ((xoffset) & 0xf);
 234
 235     /* Copy display bitmap to hardware */
 236     for (y = 0; y < LCD_FBHEIGHT; y++)
 237     {
 238         lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
 239         lcd_write_command(cmd1);
 240         lcd_write_command(cmd2);
 241
 242         lcd_write_data (FBADDR(0, y), LCD_WIDTH);
 243     }
 244 }
 245
 246 /* Update a fraction of the display. */
 247 void lcd_update_rect(int, int, int, int) ICODE_ATTR;
 248 void lcd_update_rect(int x, int y, int width, int height)
 249 {
 250     int ymax, cmd1, cmd2;
 251
 252     /* The Y coordinates have to work on even 8 pixel rows */
 253     ymax = (y + height - 1) >> 3;
 254     y >>= 3;
 255
 256     if(x + width > LCD_WIDTH)
 257         width = LCD_WIDTH - x;
 258     if (width <= 0)
 259         return; /* nothing left to do, 0 is harmful to lcd_write_data() */
 260     if(ymax >= LCD_FBHEIGHT)
 261         ymax = LCD_FBHEIGHT-1;
 262
 263
 264     cmd1 = LCD_CNTL_HIGHCOL | (((x + xoffset) >> 4) & 0xf);
 265     cmd2 = LCD_CNTL_LOWCOL | ((x + xoffset) & 0xf);
 266
 267     /* Copy specified rectange bitmap to hardware */
 268     for (; y <= ymax; y++)
 269     {
 270         lcd_write_command(LCD_CNTL_PAGE | (y & 0xf));
 271         lcd_write_command(cmd1);
 272         lcd_write_command(cmd2);
 273
 274         lcd_write_data (FBADDR(x,y), width);
 275     }
 276 }