40919d7db2
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16809 a1c6a512-1295-4272-9138-f99709370657
325 lines
8.8 KiB
C
325 lines
8.8 KiB
C
/***************************************************************************
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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) 2006 by Linus Nielsen Feltzing
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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 "system.h"
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#include "file.h"
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#include "lcd.h"
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#include "scroll_engine.h"
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/* The LCD in the iAudio M3/M5/X5 remote control is a Tomato LSI 0350 */
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#define LCD_SET_DUTY_RATIO 0x48
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#define LCD_SELECT_ADC 0xa0
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#define LCD_SELECT_SHL 0xc0
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#define LCD_SET_COM0 0x44
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#define LCD_OSC_ON 0xab
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#define LCD_SELECT_DCDC 0x64
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#define LCD_SELECT_RES 0x20
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#define LCD_SET_VOLUME 0x81
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#define LCD_SET_BIAS 0x50
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#define LCD_CONTROL_POWER 0x28
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#define LCD_DISPLAY_ON 0xae
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#define LCD_SET_INITLINE 0x40
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#define LCD_SET_COLUMN 0x10
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#define LCD_SET_PAGE 0xb0
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#define LCD_SET_GRAY 0x88
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#define LCD_SET_PWM_FRC 0x90
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#define LCD_SET_POWER_SAVE 0xa8
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#define LCD_REVERSE 0xa6
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#define CS_LO and_l(~0x00010000, &GPIO1_OUT)
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#define CS_HI or_l( 0x00010000, &GPIO1_OUT)
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#define CLK_LO and_l(~0x20000000, &GPIO_OUT)
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#define CLK_HI or_l( 0x20000000, &GPIO_OUT)
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#define DATA_LO and_l(~0x04000000, &GPIO_OUT)
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#define DATA_HI or_l( 0x04000000, &GPIO_OUT)
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#define RS_LO and_l(~0x00001000, &GPIO1_OUT)
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#define RS_HI or_l( 0x00001000, &GPIO1_OUT)
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/* cached settings values */
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static bool cached_invert = false;
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static bool cached_flip = false;
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static int cached_contrast = DEFAULT_CONTRAST_SETTING;
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bool initialized = false;
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int lcd_default_contrast(void)
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{
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return DEFAULT_CONTRAST_SETTING;
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}
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void lcd_set_contrast(int val)
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{
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if (val < 0)
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val = 0;
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else if (val > 63)
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val = 63;
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cached_contrast = val;
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if (initialized)
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lcd_write_command_e(LCD_SET_VOLUME, val);
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}
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bool remote_detect(void)
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{
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return (GPIO_READ & 0x40000000) == 0;
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}
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void lcd_on(void)
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{
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CS_HI;
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CLK_HI;
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sleep(HZ/100);
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lcd_write_command(LCD_SET_DUTY_RATIO);
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lcd_write_command(0x70); /* 1/128 */
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lcd_write_command(LCD_OSC_ON);
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lcd_write_command(LCD_SELECT_DCDC | 2); /* DC/DC 5xboost */
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lcd_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */
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lcd_write_command(LCD_SET_BIAS | 6); /* 1/11 */
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lcd_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */
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sleep(3*HZ/100);
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lcd_write_command_e(LCD_SET_GRAY | 0, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 1, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 2, 0x0c);
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lcd_write_command_e(LCD_SET_GRAY | 3, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 4, 0xcc);
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lcd_write_command_e(LCD_SET_GRAY | 5, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 6, 0xcc);
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lcd_write_command_e(LCD_SET_GRAY | 7, 0x0c);
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lcd_write_command(LCD_SET_PWM_FRC | 6); /* 3FRC + 12PWM */
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lcd_write_command(LCD_DISPLAY_ON | 1); /* display on */
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initialized = true;
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lcd_set_flip(cached_flip);
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lcd_set_contrast(cached_contrast);
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lcd_set_invert_display(cached_invert);
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}
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void lcd_off(void)
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{
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initialized = false;
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CS_HI;
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RS_HI;
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}
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void lcd_poweroff(void)
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{
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/* Set power save -> Power OFF (VDD - VSS) .. that's it */
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if (initialized)
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lcd_write_command(LCD_SET_POWER_SAVE | 1);
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}
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#ifndef BOOTLOADER
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/* Monitor remote hotswap */
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static void lcd_tick(void)
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{
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static bool last_status = false;
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static int countdown = 0;
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bool current_status;
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current_status = remote_detect();
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/* Only report when the status has changed */
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if (current_status != last_status)
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{
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last_status = current_status;
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countdown = current_status ? 20*HZ : 1;
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}
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else
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{
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/* Count down until it gets negative */
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if (countdown >= 0)
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countdown--;
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if (current_status)
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{
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if (!(countdown % 48))
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{
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queue_broadcast(SYS_REMOTE_PLUGGED, 0);
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}
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}
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else
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{
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if (countdown == 0)
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{
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queue_broadcast(SYS_REMOTE_UNPLUGGED, 0);
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}
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}
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}
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}
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#endif
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void lcd_init_device(void)
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{
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or_l(0x24000000, &GPIO_OUT);
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or_l(0x24000000, &GPIO_ENABLE);
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or_l(0x24000000, &GPIO_FUNCTION);
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or_l(0x00011000, &GPIO1_OUT);
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or_l(0x00011000, &GPIO1_ENABLE);
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or_l(0x00011000, &GPIO1_FUNCTION);
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and_l(~0x40000000, &GPIO_OUT);
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and_l(~0x40000000, &GPIO_ENABLE);
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or_l(0x40000000, &GPIO_FUNCTION);
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lcd_clear_display();
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if (remote_detect())
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lcd_on();
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#ifndef BOOTLOADER
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tick_add_task(lcd_tick);
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#endif
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}
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/* Helper function. */
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void lcd_mono_data(const unsigned char *data, int count);
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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_mono(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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if (initialized)
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{
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/* COM48-COM63 are not connected, so we need to skip those */
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while (bheight--)
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{
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lcd_write_command(LCD_SET_PAGE | ((by > 5 ? by + 2 : by) & 0xf));
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lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf);
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lcd_mono_data(data, width);
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data += stride;
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by++;
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}
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}
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}
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/* Helper function for lcd_grey_phase_blit(). */
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void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
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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_grey_phase(unsigned char *values, unsigned char *phases,
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int x, int by, int width, int bheight, int stride)
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{
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if (initialized)
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{
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stride <<= 3; /* 8 pixels per block */
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while (bheight--)
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{
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lcd_write_command(LCD_SET_PAGE | ((by > 5 ? by + 2 : by) & 0xf));
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lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf);
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lcd_grey_data(values, phases, width);
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values += stride;
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phases += stride;
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by++;
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}
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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)
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{
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int y;
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if (initialized)
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{
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for(y = 0;y < LCD_FBHEIGHT;y++)
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{
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/* Copy display bitmap to hardware.
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The COM48-COM63 lines are not connected so we have to skip
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them. Further, the column address doesn't wrap, so we
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have to update one page at a time. */
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lcd_write_command(LCD_SET_PAGE | (y > 5 ? y + 2 : y));
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lcd_write_command_e(LCD_SET_COLUMN | 0, 0);
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lcd_write_data(lcd_framebuffer[y], LCD_WIDTH);
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}
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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 x, int y, int width, int height)
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{
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if (initialized)
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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 rectangle bitmap to hardware
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COM48-COM63 are not connected, so we need to skip those */
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for (; y <= ymax; y++)
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{
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lcd_write_command(LCD_SET_PAGE | ((y > 5 ? y + 2 : y) & 0xf));
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lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 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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}
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void lcd_set_invert_display(bool yesno)
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{
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cached_invert = yesno;
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if (initialized)
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lcd_write_command(LCD_REVERSE | yesno);
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}
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void lcd_set_flip(bool yesno)
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{
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cached_flip = yesno;
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if (initialized)
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{
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if(yesno)
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{
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lcd_write_command(LCD_SELECT_ADC | 0);
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lcd_write_command(LCD_SELECT_SHL | 0);
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lcd_write_command_e(LCD_SET_COM0, 16);
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}
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else
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{
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lcd_write_command(LCD_SELECT_ADC | 1);
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lcd_write_command(LCD_SELECT_SHL | 8);
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lcd_write_command_e(LCD_SET_COM0, 0);
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}
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}
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}
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