97bdfce5b6
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14264 a1c6a512-1295-4272-9138-f99709370657
370 lines
10 KiB
C
370 lines
10 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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* 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 "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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/*** hardware configuration ***/
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#if CONFIG_CPU == PP5002
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#define IPOD_LCD_BASE 0xc0001000
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#else /* PP502x */
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#define IPOD_LCD_BASE 0x70003000
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#endif
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#define LCD_BUSY_MASK 0x00008000
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#define LCD_CMD 0x08
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#define LCD_DATA 0x10
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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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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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static unsigned short power_reg_h;
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#define POWER_REG_H power_reg_h
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#else
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#define POWER_REG_H 0x1200
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#endif
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#ifdef IPOD_1G2G
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static unsigned short contrast_reg_h;
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#define CONTRAST_REG_H contrast_reg_h
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#else
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#define CONTRAST_REG_H 0x400
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#endif
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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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#endif
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static const unsigned char dibits[16] ICONST_ATTR = {
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0x00, 0x03, 0x0C, 0x0F, 0x30, 0x33, 0x3C, 0x3F,
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0xC0, 0xC3, 0xCC, 0xCF, 0xF0, 0xF3, 0xFC, 0xFF
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};
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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 (inl(IPOD_LCD_BASE) & LCD_BUSY_MASK);
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}
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/* send LCD data */
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#if CONFIG_CPU == PP5002
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STATICIRAM void ICODE_ATTR lcd_send_data(unsigned data)
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#else
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static void lcd_send_data(unsigned data)
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#endif
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{
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lcd_wait_write();
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#ifdef IPOD_MINI2G
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outl(data | 0x760000, IPOD_LCD_BASE+8);
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#else
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outl(data >> 8, IPOD_LCD_BASE + LCD_DATA);
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lcd_wait_write();
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outl(data & 0xff, IPOD_LCD_BASE + LCD_DATA);
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#endif
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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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outl(cmd | 0x740000, IPOD_LCD_BASE+8);
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#else
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outl(0x0, IPOD_LCD_BASE + LCD_CMD);
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lcd_wait_write();
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outl(cmd, IPOD_LCD_BASE + LCD_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_prepare_cmd(cmd);
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lcd_send_data(data);
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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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#ifdef IPOD_1G2G
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if ((IPOD_HW_REVISION >> 16) == 1)
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{
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power_reg_h = 0x1500;
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contrast_reg_h = 0x700;
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}
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else /* 2nd gen */
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{
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if (inl(0xcf00404c) & 0x01) /* check bit 0 */
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{
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power_reg_h = 0x1520; /* Set step-up frequency to f/8 instead of
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* f/32, for better blacklevel stability */
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contrast_reg_h = 0x400;
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}
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else
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{
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power_reg_h = 0x1100;
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contrast_reg_h = 0x300;
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}
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}
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#elif defined IPOD_3G
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if (inl(0xcf00404c) & 0x01) /* check bit 0 */
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power_reg_h = 0x1520; /* Set step-up frequency to f/8 instead of
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* f/32, for better blacklevel stability */
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else
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power_reg_h = 0x1100;
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#elif defined IPOD_MINI2G
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lcd_wait_write();
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outl((inl(IPOD_LCD_BASE) & ~0x1f00000) | 0x1700000, IPOD_LCD_BASE);
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#endif
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lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0xc);
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#ifdef HAVE_BACKLIGHT_INVERSION
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invert_display();
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#else
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lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
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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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#ifdef IPOD_4G
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GPIOB_ENABLE |= 0x4; /* B02 enable */
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GPIOB_ENABLE |= 0x8; /* B03 enable */
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outl(inl(0x70000084) | 0x2000000, 0x70000084); /* D01 enable */
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outl(inl(0x70000080) | 0x2000000, 0x70000080); /* D01 =1 */
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DEV_EN |= 0x20000; /* PWM enable */
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#endif
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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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#ifdef IPOD_1G2G
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return 28;
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#elif defined(IPOD_MINI) || defined(IPOD_MINI2G) || defined(IPOD_3G)
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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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if (lcd_inverted ^ lcd_backlit)
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lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0017);
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else
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lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
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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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if (yesno)
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lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0017);
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else
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lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
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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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} 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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} 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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/* 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(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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const unsigned char *src, *src_end;
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while (height--) {
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src = data;
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src_end = data + bwidth;
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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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do {
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unsigned byte = *src++;
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lcd_send_data((dibits[byte>>4] << 8) | dibits[byte&0x0f]);
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} while (src < src_end);
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data += stride;
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}
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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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unsigned char *data, *data_end;
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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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data = &lcd_framebuffer[y][2*x];
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data_end = data + 2 * width;
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#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
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if (pix_offset == -2) {
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unsigned cur_word = *data++;
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do {
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cur_word = (cur_word << 8) | *data++;
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cur_word = (cur_word << 8) | *data++;
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lcd_send_data((cur_word >> 4) & 0xffff);
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} while (data <= data_end);
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} else
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#endif
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{
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do {
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unsigned highbyte = *data++;
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lcd_send_data((highbyte << 8) | *data++);
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} while (data < data_end);
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}
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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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