254 lines
8.1 KiB
C
254 lines
8.1 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Alan Korr
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "hwcompat.h"
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#include "kernel.h"
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#include "lcd.h"
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#include "system.h"
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#include "cpu.h"
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/*** definitions ***/
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#define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00)
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#define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10)
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#define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
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#define LCD_SET_POWER_CONTROL_REGISTER ((char)0x28)
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#define LCD_SET_DISPLAY_START_LINE ((char)0x40)
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#define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81)
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#define LCD_SET_SEGMENT_REMAP ((char)0xA0)
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#define LCD_SET_LCD_BIAS ((char)0xA2)
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#define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4)
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#define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5)
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#define LCD_SET_NORMAL_DISPLAY ((char)0xA6)
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#define LCD_SET_REVERSE_DISPLAY ((char)0xA7)
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#define LCD_SET_MULTIPLEX_RATIO ((char)0xA8)
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#define LCD_SET_BIAS_TC_OSC ((char)0xA9)
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#define LCD_SET_1OVER4_BIAS_RATIO ((char)0xAA)
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#define LCD_SET_INDICATOR_OFF ((char)0xAC)
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#define LCD_SET_INDICATOR_ON ((char)0xAD)
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#define LCD_SET_DISPLAY_OFF ((char)0xAE)
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#define LCD_SET_DISPLAY_ON ((char)0xAF)
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#define LCD_SET_PAGE_ADDRESS ((char)0xB0)
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#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0)
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#define LCD_SET_TOTAL_FRAME_PHASES ((char)0xD2)
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#define LCD_SET_DISPLAY_OFFSET ((char)0xD3)
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#define LCD_SET_READ_MODIFY_WRITE_MODE ((char)0xE0)
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#define LCD_SOFTWARE_RESET ((char)0xE2)
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#define LCD_NOP ((char)0xE3)
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#define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE ((char)0xEE)
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/* LCD command codes */
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#define LCD_CNTL_RESET 0xe2 /* Software reset */
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#define LCD_CNTL_POWER 0x2f /* Power control */
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#define LCD_CNTL_CONTRAST 0x81 /* Contrast */
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#define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */
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#define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */
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#define LCD_CNTL_DISPON 0xaf /* Display on */
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#define LCD_CNTL_PAGE 0xb0 /* Page address */
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#define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */
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#define LCD_CNTL_LOWCOL 0x00 /* Lower column address */
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/* TCC77x specific defines */
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#define LCD_BASE 0x50000000
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#define LCD_CMD *(volatile unsigned char*)(LCD_BASE)
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#define LCD_DATA *(volatile unsigned char*)(LCD_BASE+1)
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void lcd_write_command(int byte)
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{
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LCD_CMD = byte;
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asm volatile (
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"nop \n\t"
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"nop \n\t"
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"nop \n\t"
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);
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}
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void lcd_write_data(const fb_data* p_bytes, int count)
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{
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while (count--)
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{
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LCD_DATA = *(p_bytes++);
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asm volatile (
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"nop \n\t"
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"nop \n\t"
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"nop \n\t"
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);
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}
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}
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/* End of TCC77x specific defines */
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/** globals **/
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static int xoffset; /* needed for flip */
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/*** hardware configuration ***/
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int lcd_default_contrast(void)
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{
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return 0x1f;
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}
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void lcd_set_contrast(int val)
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{
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lcd_write_command(LCD_CNTL_CONTRAST);
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lcd_write_command(val);
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}
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void lcd_set_invert_display(bool yesno)
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{
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if (yesno)
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lcd_write_command(LCD_SET_REVERSE_DISPLAY);
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else
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lcd_write_command(LCD_SET_NORMAL_DISPLAY);
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}
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/* turn the display upside down (call lcd_update() afterwards) */
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void lcd_set_flip(bool yesno)
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{
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/* TODO: flip mode isn't working. The commands in the else part of
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this function are how the original firmware inits the LCD */
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if (yesno)
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{
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lcd_write_command(LCD_SET_SEGMENT_REMAP | 0x01);
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lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
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xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 128 we have */
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}
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else
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{
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lcd_write_command(LCD_SET_SEGMENT_REMAP);
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lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08);
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xoffset = 0;
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}
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}
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/* LCD init */
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void lcd_init_device(void)
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{
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uint32_t bus_width;
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/* Telechips init the same as the original firmware */
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CSCFG1 &= 0xc3ffc000;
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CSCFG1 |= 0x3400101a;
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CSCFG1 |= (1 << 21);
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CSCFG1 &= ~(1 << 21);
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bus_width = ((MCFG >> 11) & 0x3) ^ 3;
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CSCFG1 = (bus_width << 28) |
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(3 << 26) | /* MTYPE = 3 */
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((LCD_BASE >> 28) << 22) | /* CSBASE = 0x5 */
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(1 << 20) | /* Unknown */
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(3 << 11) | /* Setup time = 3 cycles */
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(3 << 3) | /* Pulse width = 3+1 cycles */
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(1 << 0); /* Hold time = 1 cycle */
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/* SSD1815 inits like the original firmware */
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lcd_write_command(LCD_SET_DISPLAY_OFF);
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lcd_set_flip(false);
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lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO | 5);
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lcd_set_contrast(lcd_default_contrast());
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lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER | 7);
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/* power control register: op-amp=1, regulator=1, booster=1 */
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lcd_write_command(LCD_SET_BIAS_TC_OSC);
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/* 0xc2 = 110 000 10: Osc. Freq 110 - ???
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TC value 000 - "-0.01%/C (TC0, POR)"
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Bias ratio 10 - "1/9, 1/7 (POR)"
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*/
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lcd_write_command(0xc2);
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lcd_write_command(LCD_SET_DISPLAY_ON);
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lcd_clear_display();
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lcd_update();
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}
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/*** Update functions ***/
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/* Performance function that works with an external buffer
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note that by and bheight are in 8-pixel units! */
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void lcd_blit(const unsigned char* data, int x, int by, int width,
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int bheight, int stride)
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{
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/* Copy display bitmap to hardware */
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while (bheight--)
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{
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lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
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lcd_write_data(data, width);
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data += stride;
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}
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}
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/* Update the display.
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This must be called after all other LCD functions that change the display. */
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void lcd_update(void) ICODE_ATTR;
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void lcd_update(void)
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{
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int y;
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/* Copy display bitmap to hardware */
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for (y = 0; y < LCD_FBHEIGHT; y++)
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{
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lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | ((xoffset >> 4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf));
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lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
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}
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int, int, int, int) ICODE_ATTR;
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void lcd_update_rect(int x, int y, int width, int height)
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{
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int ymax;
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/* The Y coordinates have to work on even 8 pixel rows */
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ymax = (y + height-1) >> 3;
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y >>= 3;
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if(x + width > LCD_WIDTH)
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width = LCD_WIDTH - x;
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if (width <= 0)
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return; /* nothing left to do, 0 is harmful to lcd_write_data() */
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if(ymax >= LCD_FBHEIGHT)
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ymax = LCD_FBHEIGHT-1;
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/* Copy specified rectange bitmap to hardware */
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for (; y <= ymax; y++)
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{
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lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset) >> 4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
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lcd_write_data (&lcd_framebuffer[y][x], width);
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}
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}
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