diff options
Diffstat (limited to 'firmware/target/arm/pnx0101/iriver-ifp7xx/lcd-ifp7xx.c')
| -rw-r--r-- | firmware/target/arm/pnx0101/iriver-ifp7xx/lcd-ifp7xx.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/firmware/target/arm/pnx0101/iriver-ifp7xx/lcd-ifp7xx.c b/firmware/target/arm/pnx0101/iriver-ifp7xx/lcd-ifp7xx.c new file mode 100644 index 0000000000..0aacd8af67 --- /dev/null +++ b/firmware/target/arm/pnx0101/iriver-ifp7xx/lcd-ifp7xx.c @@ -0,0 +1,208 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2002 by Alan Korr + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include "config.h" + +#include "kernel.h" +#include "lcd.h" +#include "system.h" + +/*** definitions ***/ + +#define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00) +#define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10) +#define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20) +#define LCD_SET_POWER_CONTROL_REGISTER ((char)0x28) +#define LCD_SET_DISPLAY_START_LINE ((char)0x40) +#define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81) +#define LCD_SET_SEGMENT_REMAP ((char)0xA0) +#define LCD_SET_LCD_BIAS ((char)0xA2) +#define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4) +#define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5) +#define LCD_SET_NORMAL_DISPLAY ((char)0xA6) +#define LCD_SET_REVERSE_DISPLAY ((char)0xA7) +#define LCD_SET_MULTIPLEX_RATIO ((char)0xA8) +#define LCD_SET_BIAS_TC_OSC ((char)0xA9) +#define LCD_SET_1OVER4_BIAS_RATIO ((char)0xAA) +#define LCD_SET_INDICATOR_OFF ((char)0xAC) +#define LCD_SET_INDICATOR_ON ((char)0xAD) +#define LCD_SET_DISPLAY_OFF ((char)0xAE) +#define LCD_SET_DISPLAY_ON ((char)0xAF) +#define LCD_SET_PAGE_ADDRESS ((char)0xB0) +#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0) +#define LCD_SET_TOTAL_FRAME_PHASES ((char)0xD2) +#define LCD_SET_DISPLAY_OFFSET ((char)0xD3) +#define LCD_SET_READ_MODIFY_WRITE_MODE ((char)0xE0) +#define LCD_SOFTWARE_RESET ((char)0xE2) +#define LCD_NOP ((char)0xE3) +#define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE ((char)0xEE) + +/* LCD command codes */ +#define LCD_CNTL_RESET 0xe2 /* Software reset */ +#define LCD_CNTL_POWER 0x2f /* Power control */ +#define LCD_CNTL_CONTRAST 0x81 /* Contrast */ +#define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */ +#define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */ +#define LCD_CNTL_DISPON 0xaf /* Display on */ + +#define LCD_CNTL_PAGE 0xb0 /* Page address */ +#define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */ +#define LCD_CNTL_LOWCOL 0x00 /* Lower column address */ + +/*** driver routines ***/ + +void lcd_write_command(int cmd) +{ + while ((LCDSTAT & 3) != 3); + LCDCMD = cmd; +} + +void lcd_write_data( const unsigned char* data, int count ) +{ + int i; + for (i=0; i < count; i++) { + while ((LCDSTAT & 3) != 3); + LCDDATA = data[i]; + } +} + +/*** hardware configuration ***/ + +int lcd_default_contrast(void) +{ + return 45; +} + +void lcd_set_contrast(int val) +{ + lcd_write_command(LCD_CNTL_CONTRAST); + lcd_write_command(val); +} + +void lcd_set_invert_display(bool yesno) +{ + if (yesno) + lcd_write_command(LCD_SET_REVERSE_DISPLAY); + else + lcd_write_command(LCD_SET_NORMAL_DISPLAY); +} + +/* turn the display upside down (call lcd_update() afterwards) */ +void lcd_set_flip(bool yesno) +{ + if (yesno) + { + lcd_write_command(LCD_SET_SEGMENT_REMAP); + lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION); + } + else + { + lcd_write_command(LCD_SET_SEGMENT_REMAP | 0x01); + lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08); + } +} + +void lcd_init_device(void) +{ + LCDREG10 = 0xf; + LCDREG04 = 0x4084; + + /* inits like the original firmware */ + lcd_write_command(LCD_SOFTWARE_RESET); + lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 4); + lcd_write_command(LCD_SET_LCD_BIAS); + lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7); + /* power control register: op-amp=1, regulator=1, booster=1 */ + lcd_write_command(LCD_SET_DISPLAY_ON); + lcd_write_command(LCD_SET_NORMAL_DISPLAY); + lcd_set_flip(false); + lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0); + lcd_set_contrast(lcd_default_contrast()); + lcd_write_command(LCD_SET_PAGE_ADDRESS); + lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0); + lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0); + + lcd_clear_display(); + lcd_update(); +} + +/*** Update functions ***/ + +/* Performance function that works with an external buffer + note that by and bheight are in 8-pixel units! */ +void lcd_blit(const unsigned char* data, int x, int by, int width, + int bheight, int stride) +{ + /* Copy display bitmap to hardware */ + while (bheight--) + { + lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); + lcd_write_command (LCD_CNTL_HIGHCOL | (((x+4)>>4) & 0xf)); + lcd_write_command (LCD_CNTL_LOWCOL | ((x+4) & 0xf)); + + lcd_write_data(data, width); + data += stride; + } +} + + +/* Update the display. + This must be called after all other LCD functions that change the display. */ +void lcd_update(void) ICODE_ATTR; +void lcd_update(void) +{ + int y; + + /* Copy display bitmap to hardware */ + for (y = 0; y < LCD_FBHEIGHT; y++) + { + lcd_write_command (LCD_CNTL_PAGE | (y & 0xf)); + lcd_write_command (LCD_CNTL_HIGHCOL); + lcd_write_command (LCD_CNTL_LOWCOL | 4); + + lcd_write_data (lcd_framebuffer[y], LCD_WIDTH); + } +} + +/* Update a fraction of the display. */ +void lcd_update_rect(int, int, int, int) ICODE_ATTR; +void lcd_update_rect(int x, int y, int width, int height) +{ + int ymax; + + /* The Y coordinates have to work on even 8 pixel rows */ + ymax = (y + height-1) >> 3; + y >>= 3; + + if(x + width > LCD_WIDTH) + width = LCD_WIDTH - x; + if (width <= 0) + return; /* nothing left to do, 0 is harmful to lcd_write_data() */ + if(ymax >= LCD_FBHEIGHT) + ymax = LCD_FBHEIGHT-1; + + /* Copy specified rectange bitmap to hardware */ + for (; y <= ymax; y++) + { + lcd_write_command (LCD_CNTL_PAGE | (y & 0xf)); + lcd_write_command (LCD_CNTL_HIGHCOL | (((x+4) >> 4) & 0xf)); + lcd_write_command (LCD_CNTL_LOWCOL | ((x+4) & 0xf)); + + lcd_write_data (&lcd_framebuffer[y][x], width); + } +} |