684c70bac5
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25842 a1c6a512-1295-4272-9138-f99709370657
178 lines
6.6 KiB
ArmAsm
178 lines
6.6 KiB
ArmAsm
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id:$
|
|
*
|
|
* Copyright (C) 2010 Marcin Bukat
|
|
* based on lcd-as-m3.S by Jens Arnold
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "config.h"
|
|
#include "cpu.h"
|
|
|
|
|
|
#define LCD_BASE_ADDRESS 0xf0000000
|
|
|
|
.section .icode,"ax",@progbits
|
|
|
|
.align 2
|
|
.global lcd_write_command
|
|
.type lcd_write_command,@function
|
|
|
|
lcd_write_command:
|
|
move.l (4, %sp), %d0
|
|
move.w %d0, LCD_BASE_ADDRESS /* data is 1byte but CF uses word
|
|
* transfers only */
|
|
rts
|
|
.wc_end:
|
|
.size lcd_write_command,.wc_end-lcd_write_command
|
|
|
|
|
|
.align 2
|
|
.global lcd_write_command_e
|
|
.type lcd_write_command_e,@function
|
|
|
|
lcd_write_command_e:
|
|
lea.l LCD_BASE_ADDRESS, %a0
|
|
|
|
move.l (4, %sp), %d0 /* Command */
|
|
move.w %d0, (%a0)
|
|
move.l (8, %sp), %d0 /* Data */
|
|
move.w %d0, (%a0) /* Write to LCD */
|
|
|
|
rts
|
|
.wce_end:
|
|
.size lcd_write_command_e,.wce_end-lcd_write_command_e
|
|
|
|
|
|
.align 2
|
|
.global lcd_write_data
|
|
.type lcd_write_data,@function
|
|
|
|
/* PIXELFORMAT = VERTICAL_INTERLEAVED
|
|
* this means that data is packed verticaly in 8 pixels columns
|
|
* first byte is lsb of 2bit color in column
|
|
* second byte is msb of 2bit color in column
|
|
* so one word of data equals 8 pixels i 2bits color depth packed
|
|
* verticaly
|
|
*/
|
|
lcd_write_data:
|
|
movem.l (4, %sp), %a0 /* Data pointer */
|
|
move.l (8, %sp), %d0 /* Length i in words */
|
|
lea LCD_BASE_ADDRESS+2, %a1 /* LCD data port address */
|
|
|
|
btst #0, %d0 /* longwords multiply? */
|
|
beq .l_write
|
|
|
|
.w_write:
|
|
move.w (%a0)+, %d1 /* load data 3 cycles*/
|
|
move.w %d1, (%a1) /* first byte 1 cycle*/
|
|
lsr.l #8, %d1 /* load second byte 1 cycle*/
|
|
move.w %d1, (%a1) /* transfer 1 cycle*/
|
|
subq.l #1, %d0 /* decrement counter 1 cycle*/
|
|
beq .write_end
|
|
|
|
.l_write:
|
|
move.l (%a0)+, %d1 /* load data 2 cycles*/
|
|
swap %d1 /* 1 cycle */
|
|
move.w %d1, (%a1) /* first byte 1 cycle*/
|
|
lsr.l #8, %d1 /* 1 cycle */
|
|
move.w %d1, (%a1) /* second byte 1 cycle*/
|
|
lsr.l #8, %d1 /* 1 cycle */
|
|
move.w %d1, (%a1) /* third byte 1 cycle*/
|
|
lsr.l #8, %d1 /* 1 cycle */
|
|
move.w %d1, (%a1) /* forth byte 1 cycle*/
|
|
subq.l #2, %d0 /* decrement counter 1 cycle*/
|
|
bne .l_write
|
|
|
|
.write_end:
|
|
rts
|
|
.wd_end:
|
|
.size lcd_write_data,.wd_end-lcd_write_data
|
|
|
|
.global lcd_mono_data
|
|
.type lcd_mono_data, @function
|
|
|
|
lcd_mono_data:
|
|
move.l (4, %sp), %a0 /* p_bytes */
|
|
move.l (8, %sp), %d0 /* count */
|
|
lea.l LCD_BASE_ADDRESS+2, %a1 /* LCD data port address */
|
|
|
|
.md_loop:
|
|
move.b (%a0)+, %d1
|
|
move.w %d1, (%a1) /* byte transfers actually */
|
|
move.w %d1, (%a1)
|
|
subq.l #1, %d0
|
|
bne.s .md_loop
|
|
rts
|
|
.md_end:
|
|
.size lcd_mono_data,.md_end-lcd_mono_data
|
|
|
|
.global lcd_grey_data
|
|
.type lcd_grey_data,@function
|
|
|
|
lcd_grey_data:
|
|
lea.l (-2*4, %sp), %sp
|
|
movem.l %a2-%a3, (%sp)
|
|
movem.l (2*4+4, %sp), %a0-%a2 /* values, phases, length */
|
|
add.l %a2, %a2
|
|
lea.l (%a1, %a2.l*4), %a2 /* end address */
|
|
lea.l LCD_BASE_ADDRESS+2, %a3 /* LCD data port address */
|
|
.ph_loop:
|
|
clr.l %d1
|
|
move.l (%a1), %d0 /* fetch 4 pixel phases */
|
|
bclr.l #31, %d0 /* Z = !(p0 & 0x80); p0 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = ........................00000000 */
|
|
lsl.l #1, %d1 /* %d1 = .......................00000000. */
|
|
bclr.l #23, %d0 /* Z = !(p1 & 0x80); p1 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = .......................011111111 */
|
|
lsl.l #1, %d1 /* %d1 = ......................011111111. */
|
|
bclr.l #15, %d0 /* Z = !(p2 & 0x80); p2 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = ......................0122222222 */
|
|
lsl.l #1, %d1 /* %d1 = .....................0122222222. */
|
|
bclr.l #7, %d0 /* Z = !(p3 & 0x80); p3 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = .....................01233333333 */
|
|
lsl.l #1, %d1 /* %d1 = ....................01233333333. */
|
|
add.l (%a0)+, %d0 /* add 4 pixel values to the phases */
|
|
move.l %d0, (%a1)+ /* store new phases, advance pointer */
|
|
|
|
move.l (%a1), %d0 /* fetch 4 pixel phases */
|
|
bclr.l #31, %d0 /* Z = !(p0 & 0x80); p0 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = ....................012344444444 */
|
|
lsl.l #1, %d1 /* %d1 = ...................012344444444. */
|
|
bclr.l #23, %d0 /* Z = !(p1 & 0x80); p1 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = ...................0123455555555 */
|
|
lsl.l #1, %d1 /* %d1 = ..................0123455555555. */
|
|
bclr.l #15, %d0 /* Z = !(p2 & 0x80); p2 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = ..................01234566666666 */
|
|
lsl.l #1, %d1 /* %d1 = .................01234566666666. */
|
|
bclr.l #7, %d0 /* Z = !(p3 & 0x80); p3 &= ~0x80; */
|
|
seq.b %d1 /* %d1 = .................012345677777777 */
|
|
lsr.l #7, %d1 /* %d1 = ........................01234567 */
|
|
add.l (%a0)+, %d0 /* add 4 pixel values to the phases */
|
|
move.l %d0, (%a1)+ /* store new phases, advance pointer */
|
|
|
|
move.w %d1, (%a3) /* transfer to lcd */
|
|
move.w %d1, (%a3) /* transfer to lcd */
|
|
|
|
cmp.l %a2, %a1
|
|
bls .ph_loop
|
|
|
|
movem.l (%sp), %a2-%a3
|
|
lea.l (2*4, %sp), %sp
|
|
rts
|
|
.grey_end:
|
|
.size lcd_grey_data,.grey_end-lcd_grey_data
|