2acc0ac542
later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
358 lines
9.9 KiB
C
358 lines
9.9 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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* Rockbox driver for iPod LCDs
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*
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* Based on code from the ipodlinux project - http://ipodlinux.org/
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* Adapted for Rockbox in November 2005
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*
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* Original file: linux/arch/armnommu/mach-ipod/fb.c
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*
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* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 "cpu.h"
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#include "lcd.h"
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#include "kernel.h"
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#include "system.h"
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#include "hwcompat.h"
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/* LCD command codes for HD66753 */
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#define R_START_OSC 0x00
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#define R_DRV_OUTPUT_CONTROL 0x01
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#define R_DRV_WAVEFORM_CONTROL 0x02
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#define R_POWER_CONTROL 0x03
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#define R_CONTRAST_CONTROL 0x04
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#define R_ENTRY_MODE 0x05
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#define R_ROTATION 0x06
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#define R_DISPLAY_CONTROL 0x07
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#define R_CURSOR_CONTROL 0x08
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#define R_HORIZONTAL_CURSOR_POS 0x0b
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#define R_VERTICAL_CURSOR_POS 0x0c
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#define R_1ST_SCR_DRV_POS 0x0d
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#define R_2ND_SCR_DRV_POS 0x0e
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#define R_RAM_WRITE_MASK 0x10
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#define R_RAM_ADDR_SET 0x11
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#define R_RAM_DATA 0x12
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#ifdef HAVE_BACKLIGHT_INVERSION
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/* The backlight makes the LCD appear negative on the 1st/2nd gen */
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static bool lcd_inverted = false;
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static bool lcd_backlit = false;
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#if NUM_CORES > 1
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/* invert_display() and the lcd_blit_* functions need to be corelocked */
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static struct corelock cl IBSS_ATTR;
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#endif
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static void invert_display(void);
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#endif
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#if defined(IPOD_1G2G) || defined(IPOD_3G)
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#define POWER_REG_H 0x1120 /* 1/7 Bias, 5x step-up @ clk/8 */
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#else
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#define POWER_REG_H 0x1200 /* 1/7 Bias, 6x step-up @ clk/32 */
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#endif
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#define CONTRAST_REG_H 0x400
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/* needed for flip */
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static int addr_offset;
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#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
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static int pix_offset;
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void lcd_write_data_shifted(const fb_data* p_bytes, int count);
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#endif
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/* wait for LCD with timeout */
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static inline void lcd_wait_write(void)
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{
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while (LCD1_CONTROL & LCD1_BUSY_MASK);
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}
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/* send LCD command */
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static void lcd_prepare_cmd(unsigned cmd)
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{
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lcd_wait_write();
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#ifdef IPOD_MINI2G
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LCD1_CMD = cmd | 0x740000;
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#else
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LCD1_CMD = 0;
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lcd_wait_write();
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LCD1_CMD = cmd;
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#endif
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}
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/* send LCD command and data */
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static void lcd_cmd_and_data(unsigned cmd, unsigned data)
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{
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lcd_wait_write();
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#ifdef IPOD_MINI2G
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LCD1_CMD = cmd | 0x740000;
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lcd_wait_write();
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LCD1_CMD = data | 0x760000;
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#else
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LCD1_CMD = 0;
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lcd_wait_write();
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LCD1_CMD = cmd;
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lcd_wait_write();
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LCD1_DATA = data >> 8;
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lcd_wait_write();
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LCD1_DATA = data & 0xff;
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#endif
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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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#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
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corelock_init(&cl);
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#endif
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#ifdef IPOD_MINI2G /* serial LCD hookup */
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lcd_wait_write();
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LCD1_CONTROL = 0x01730084; /* fastest setting */
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#elif defined(IPOD_1G2G) || defined(IPOD_3G)
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LCD1_CONTROL = (LCD1_CONTROL & 0x0002) | 0x0084;
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/* fastest setting, keep backlight bit */
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#else
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LCD1_CONTROL = 0x0084; /* fastest setting */
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#endif
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lcd_cmd_and_data(R_DRV_WAVEFORM_CONTROL, 0x48);
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/* C waveform, no EOR, 9 lines inversion */
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0xc);
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lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0019);
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#ifdef HAVE_BACKLIGHT_INVERSION
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invert_display();
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#endif
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lcd_set_flip(false);
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lcd_cmd_and_data(R_ENTRY_MODE, 0x0000);
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}
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/*** hardware configuration ***/
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int lcd_default_contrast(void)
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{
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#if defined(IPOD_1G2G)
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return 45;
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#elif defined(IPOD_3G)
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return 55;
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#elif defined(IPOD_MINI) || defined(IPOD_MINI2G)
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return 42;
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#elif defined(IPOD_4G)
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return 35;
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#endif
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}
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/* Rockbox stores the contrast as 0..63 - we add 64 to it */
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void lcd_set_contrast(int val)
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{
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if (val < 0) val = 0;
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else if (val > 63) val = 63;
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lcd_cmd_and_data(R_CONTRAST_CONTROL, CONTRAST_REG_H | (val + 64));
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}
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#ifdef HAVE_BACKLIGHT_INVERSION
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static void invert_display(void)
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{
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static bool last_invert = false;
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bool new_invert = lcd_inverted ^ lcd_backlit;
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if (new_invert != last_invert)
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{
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int oldlevel = disable_irq_save();
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#if NUM_CORES > 1
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corelock_lock(&cl);
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lcd_cmd_and_data(R_DISPLAY_CONTROL, new_invert? 0x0027 : 0x0019);
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corelock_unlock(&cl);
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#else
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lcd_cmd_and_data(R_DISPLAY_CONTROL, new_invert? 0x0027 : 0x0019);
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#endif
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restore_irq(oldlevel);
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last_invert = new_invert;
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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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lcd_inverted = yesno;
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invert_display();
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}
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void lcd_set_backlight_inversion(bool yesno)
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{
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lcd_backlit = yesno;
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invert_display();
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}
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#else
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void lcd_set_invert_display(bool yesno)
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{
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lcd_cmd_and_data(R_DISPLAY_CONTROL, yesno ? 0x0027 : 0x0019);
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}
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#endif
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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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#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
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if (yesno)
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{ /* 168x112, inverse COM order */
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lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x020d);
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lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x8316); /* 22..131 */
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addr_offset = (22 << 5) | (20 - 4);
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pix_offset = -2;
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}
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else
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{ /* 168x112, inverse SEG order */
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lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x010d);
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lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x6d00); /* 0..109 */
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addr_offset = 20;
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pix_offset = 0;
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}
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#else
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if (yesno)
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{ /* 168x128, inverse SEG & COM order */
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lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x030f);
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lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x8304); /* 4..131 */
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addr_offset = (4 << 5) | (20 - 1);
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}
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else
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{ /* 168x128 */
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lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x000f);
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lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x7f00); /* 0..127 */
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addr_offset = 20;
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}
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#endif
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}
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void lcd_enable(bool on)
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{
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if (on)
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{
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lcd_cmd_and_data(R_START_OSC, 1); /* start oscillation */
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sleep(HZ/10); /* wait 10ms */
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H); /*clear standby mode */
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0xc);
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/* enable opamp & booster */
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}
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else
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{
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H);
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/* switch off opamp & booster */
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0x1);
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/* enter standby mode */
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}
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}
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/*** update functions ***/
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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 x, bwidtht and stride are in 8-pixel units! */
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void lcd_blit_mono(const unsigned char *data, int bx, int y, int bwidth,
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int height, int stride)
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{
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#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
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corelock_lock(&cl);
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#endif
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while (height--)
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{
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lcd_cmd_and_data(R_RAM_ADDR_SET, (y++ << 5) + addr_offset - bx);
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lcd_prepare_cmd(R_RAM_DATA);
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lcd_mono_data(data, bwidth);
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data += stride;
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}
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#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
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corelock_unlock(&cl);
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#endif
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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 bx and bwidth 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 bx, int y, int bwidth, int height, int stride)
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{
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#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
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corelock_lock(&cl);
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#endif
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while (height--)
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{
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lcd_cmd_and_data(R_RAM_ADDR_SET, (y++ << 5) + addr_offset - bx);
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lcd_prepare_cmd(R_RAM_DATA);
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lcd_grey_data(values, phases, bwidth);
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values += stride;
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phases += stride;
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}
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#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
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corelock_unlock(&cl);
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#endif
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}
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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 xmax, ymax;
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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;
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ymax = y + height - 1;
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if (ymax >= LCD_HEIGHT)
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ymax = LCD_HEIGHT - 1;
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#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
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x += pix_offset;
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#endif
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/* writing is done in 16-bit units (8 pixels) */
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xmax = (x + width - 1) >> 3;
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x >>= 3;
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width = xmax - x + 1;
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for (; y <= ymax; y++)
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{
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lcd_cmd_and_data(R_RAM_ADDR_SET, (y << 5) + addr_offset - x);
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lcd_prepare_cmd(R_RAM_DATA);
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#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
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if (pix_offset == -2)
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lcd_write_data_shifted(&lcd_framebuffer[y][2*x], width);
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else
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#endif
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lcd_write_data(&lcd_framebuffer[y][2*x], width);
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}
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}
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/* Update the display. */
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void lcd_update(void)
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{
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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#ifdef HAVE_LCD_SHUTDOWN
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/* LCD powerdown */
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void lcd_shutdown(void)
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{
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0x00); /* Turn off op amp power */
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0x02); /* Put LCD driver in standby */
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}
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#endif
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