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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 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"
#if CONFIG_CPU == PP5002
.section .icode,"ax",%progbits
#else
.text
#endif
.align 2
.global lcd_write_data
.type lcd_write_data,%function
lcd_write_data:
ldr r12, =LCD1_BASE
.loop:
ldrb r2, [r0], #1
#ifdef IPOD_MINI2G
ldrb r3, [r0], #1
orr r2, r3, r2, lsl #8
orr r2, r2, #0x760000
1:
ldr r3, [r12]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r2, [r12, #0x08]
#else
1:
ldr r3, [r12]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r2, [r12, #0x10]
ldrb r2, [r0], #1
1:
ldr r3, [r12]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r2, [r12, #0x10]
#endif
subs r1, r1, #1
bne .loop
bx lr
.size lcd_write_data,.-lcd_write_data
#ifdef IPOD_MINI2G
.global lcd_write_data_shifted
.type lcd_write_data_shifted,%function
lcd_write_data_shifted:
stmfd sp!, {r4, lr}
ldr lr, =LCD1_BASE
mov r12, #0x760000
ldrb r2, [r0], #1
.sloop:
ldrb r3, [r0], #1
orr r2, r3, r2, lsl #8
ldrb r3, [r0], #1
orr r2, r3, r2, lsl #8
mov r4, r2, lsl #12
orr r4, r12, r4, lsr #16
1:
ldr r3, [lr]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r4, [lr, #0x08]
subs r1, r1, #1
bne .sloop
ldmpc regs=r4
.size lcd_write_data_shifted,.-lcd_write_data_shifted
#elif defined IPOD_MINI
.global lcd_write_data_shifted
.type lcd_write_data_shifted,%function
lcd_write_data_shifted:
str lr, [sp, #-4]!
ldr lr, =LCD1_BASE
ldrb r2, [r0], #1
.sloop:
ldrb r3, [r0], #1
orr r2, r3, r2, lsl #8
mov r12, r2, lsr #4
1:
ldr r3, [lr]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r12, [lr, #0x10]
ldrb r3, [r0], #1
orr r2, r3, r2, lsl #8
mov r12, r2, lsr #4
1:
ldr r3, [lr]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r12, [lr, #0x10]
subs r1, r1, #1
bne .sloop
ldrpc
.size lcd_write_data_shifted,.-lcd_write_data_shifted
#endif
.global lcd_mono_data
.type lcd_mono_data,%function
lcd_mono_data:
stmfd sp!, {r4, lr}
ldr lr, =LCD1_BASE
adr r12, .dibits
.mloop:
ldrb r2, [r0], #1
mov r3, r2, lsr #4
ldrb r4, [r12, r3]
#ifdef IPOD_MINI2G
and r3, r2, #0x0f
ldrb r3, [r12, r3]
orr r4, r3, r4, lsl #8
orr r4, r4, #0x760000
1:
ldr r3, [lr]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r4, [lr, #0x08]
#else
1:
ldr r3, [lr]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r4, [lr, #0x10]
and r3, r2, #0x0f
ldrb r4, [r12, r3]
1:
ldr r3, [lr]
tst r3, #LCD1_BUSY_MASK
bne 1b
str r4, [lr, #0x10]
#endif
subs r1, r1, #1
bne .mloop
ldmpc regs=r4
.dibits:
.byte 0x00, 0x03, 0x0C, 0x0F, 0x30, 0x33, 0x3C, 0x3F
.byte 0xC0, 0xC3, 0xCC, 0xCF, 0xF0, 0xF3, 0xFC, 0xFF
.size lcd_mono_data,.-lcd_mono_data
.global lcd_grey_data
.type lcd_grey_data,%function
/* A high performance function to write grey phase data to the display,
* one or multiple pixels.
*
* Arguments:
* r0 - pixel value data address
* r1 - pixel phase data address
* r2 - pixel block count
*
* Register usage:
* r3/r4 - current block of phases
* r5/r6 - lcd data accumulators
* r6/r7 - current block of values
* r12 - phase signs mask
* lr - lcd bridge address
*/
lcd_grey_data:
stmfd sp!, {r4-r7, lr}
mov r12, #0x80
orr r12, r12, r12, lsl #8
orr r12, r12, r12, lsl #16
ldr lr, =LCD1_BASE
.greyloop:
ldmia r1, {r3-r4} /* Fetch 8 pixel phases */
bic r5, r12, r3 /* r5 = 3.......2.......1.......0....... */
orr r5, r5, r5, lsr #10 /* r5 = 3.......2.3.....1.2.....0.1..... */
orr r5, r5, r5, lsr #10 /* r5 = 3.......2.3.....1.2.3...0.1.2... */
orr r5, r5, r5, lsr #10 /* r5 = 3.......2.3.....1.2.3...0.1.2.3. */
orr r5, r5, r5, lsr #1 /* r5 = 33......2233....112233..00112233 */
bic r3, r3, r12
#ifndef IPOD_MINI2G /* 8 bit parallel bridge mode */
1:
ldr r6, [lr]
tst r6, #LCD1_BUSY_MASK
bne 1b
str r5, [lr, #0x10]
#endif
ldmia r0!, {r6-r7} /* Fetch 8 pixel values */
add r3, r3, r6
bic r6, r12, r4 /* r6 = 7.......6.......5.......4....... */
orr r6, r6, r6, lsr #10 /* r6 = 7.......6.7.....5.6.....4.5..... */
orr r6, r6, r6, lsr #10 /* r6 = 7.......6.7.....5.6.7...4.5.6... */
orr r6, r6, r6, lsr #10 /* r6 = 7.......6.7.....5.6.7...4.5.6.7. */
orr r6, r6, r6, lsr #1 /* r6 = 77......6677....556677..44556677 */
bic r4, r4, r12
add r4, r4, r7
stmia r1!, {r3-r4}
#ifdef IPOD_MINI2G /* 16 bit serial bridge mode */
and r5, r5, #0xff /* r5 = ........................00112233 */
and r6, r6, #0xff /* r6 = ........................44556677 */
orr r5, r6, r5, lsl #8 /* r5 = ................0011223344556677 */
orr r5, r5, #0x760000 /* data marker */
#endif
1:
ldr r7, [lr]
tst r7, #LCD1_BUSY_MASK
bne 1b
#ifdef IPOD_MINI2G
str r5, [lr, #0x08]
#else
str r6, [lr, #0x10]
#endif
subs r2, r2, #1
bne .greyloop
ldmpc regs=r4-r7
.size lcd_grey_data,.-lcd_grey_data
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