8b926e98f8
UNTESTED, could ver well brick your Clip+ If it works, booting should just be delayed by a small delay (perhaps not noticeable) Hopefully the Clipv2 checks will work for Clip+ and then we'll be able to test the other Clipv2 code (LCD/button) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24219 a1c6a512-1295-4272-9138-f99709370657
226 lines
7.3 KiB
ArmAsm
226 lines
7.3 KiB
ArmAsm
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2008 Rafaël Carré
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
.text
|
|
|
|
#if defined(SANSA_CLIPV2) || defined(SANSA_CLIPPLUS)
|
|
.set RAM_SIZE, 0x100000 /* Use 1MB of SDRAM on v2 firmwares (bigger firmware) */
|
|
#else
|
|
.set RAM_SIZE, 0x50000 /* Use full IRAM on v1 firmwares */
|
|
#endif
|
|
|
|
/* AS3525 hardware registers */
|
|
.set GPIOA, 0xC80B0000
|
|
.set GPIOB, 0xC80C0000
|
|
.set GPIOC, 0xC80D0000
|
|
.set GPIOD, 0xC80E0000
|
|
.set CGU_PERI, 0xC80F0014
|
|
|
|
|
|
/* Vectors */
|
|
|
|
ldr pc, =start /* reset vector */
|
|
/* next vectors are unused */
|
|
.word 0
|
|
.word 0
|
|
.word 0
|
|
.word 0
|
|
.word 0
|
|
.word 0
|
|
.word 0
|
|
|
|
/* These values are filled in by mkamsboot - don't move them from offset 0x20 */
|
|
|
|
uclunpack_end: .word 0 /* End of the ucl_unpack function */
|
|
uclunpack_size: .word 0 /* Size in bytes of the ucl_unpack function */
|
|
|
|
ucl_of_end: .word 0 /* End of the ucl-compressed OF image */
|
|
ucl_of_size: .word 0 /* Size in bytes of the compressed OF image */
|
|
|
|
ucl_rb_end: .word 0 /* End of the ucl-compressed RB image */
|
|
ucl_rb_size: .word 0 /* Size in bytes of the compressed RB image */
|
|
|
|
|
|
start:
|
|
/* First copy the UCL unpack function to the end of RAM */
|
|
ldr r0, uclunpack_end /* Source */
|
|
ldr r1, uclunpack_size /* Source length */
|
|
sub r2, r0, r1 /* Source start - 1*/
|
|
|
|
ldr r3, =(RAM_SIZE-1) /* Destination end */
|
|
|
|
uclcopy:
|
|
ldrb r4, [r0], #-1
|
|
strb r4, [r3], #-1
|
|
cmp r2, r0
|
|
bne uclcopy
|
|
|
|
add r5, r3, #2 /* r5 is entry point of copy of uclunpack */
|
|
/* function, plus one (for thumb mode */
|
|
|
|
/* enable gpio clock */
|
|
ldr r0, =CGU_PERI
|
|
ldr r1, [r0]
|
|
orr r1, r1, #(1<<16)
|
|
str r1, [r0]
|
|
|
|
|
|
/* TODO : M200V4 */
|
|
#if defined(SANSA_C200V2)
|
|
#define USB_PIN 1
|
|
#elif defined(SANSA_CLIP) || defined(SANSA_CLIPV2)
|
|
#define USB_PIN 6
|
|
#elif defined(SANSA_FUZE) || defined(SANSA_E200V2)
|
|
#define USB_PIN 3
|
|
#endif
|
|
|
|
#ifdef USB_PIN /* TODO : remove this check when we'll have an USB driver */
|
|
ldr r0, =GPIOA
|
|
mov r1, #0
|
|
str r1, [r0, #0x400]
|
|
ldr r1, [r0, #(4*(1<<USB_PIN))]
|
|
cmp r1, #0
|
|
bne boot_of
|
|
#endif
|
|
|
|
/* Here are model specific tests, for dual boot without a computer */
|
|
/* All models use left button */
|
|
/* /!\ Right button for c200v2 (left button is unkwown) */
|
|
|
|
#ifdef SANSA_CLIP
|
|
.set row, (1<<5) /* enable output on C5 */
|
|
.set col, (1<<0) /* read keyscan column B0 */
|
|
|
|
ldr r0, =GPIOC
|
|
mov r1, #row
|
|
str r1, [r0, #0x400]
|
|
str r1, [r0, #(4*row)]
|
|
|
|
ldr r0, =GPIOB
|
|
mov r1, #0
|
|
str r1, [r0, #0x400]
|
|
ldr r1, [r0, #(4*col)]
|
|
|
|
cmp r1, #0
|
|
bne boot_of
|
|
#elif defined(SANSA_CLIPV2)
|
|
.set row, (1<<4) /* enable output on D4 */
|
|
.set col, (1<<0) /* read keyscan column D0 */
|
|
|
|
ldr r0, =GPIOD
|
|
mov r1, #((1<<5)|(1<<4)|(1<<3)) /* all rows as output */
|
|
str r1, [r0, #0x400]
|
|
|
|
/* all rows high */
|
|
mov r1, #(1<<3)
|
|
str r1, [r0, #(4*(1<<3))]
|
|
mov r1, #(1<<4)
|
|
str r1, [r0, #(4*(1<<4))]
|
|
mov r1, #(1<<5)
|
|
str r1, [r0, #(4*(1<<5))]
|
|
|
|
mov r1, #0 /* button row low */
|
|
str r1, [r0, #(4*row)]
|
|
|
|
mov r1, #5 /* small delay */
|
|
1: subs r1, r1, #1
|
|
bne 1b
|
|
|
|
ldr r1, [r0, #(4*col)]
|
|
|
|
cmp r1, #0
|
|
beq boot_of
|
|
#elif defined(SANSA_E200V2) || defined(SANSA_FUZE)
|
|
ldr r0, =GPIOC
|
|
mov r1, #0
|
|
str r1, [r0, #0x400]
|
|
ldr r1, [r0, #0x20] /* read pin C3 */
|
|
|
|
cmp r1, #0 /* C3 = #0 means button pressed */
|
|
beq boot_of
|
|
#elif defined(SANSA_CLIPPLUS)
|
|
/* TODO */
|
|
mov r0, #0x500000 /* Approximately 5 seconds */
|
|
1: subs r0, r0, #1 /* just to prove we are running */
|
|
bne 1b
|
|
b boot_of /* branch to OF */
|
|
#elif defined(SANSA_C200V2)
|
|
/* check for RIGHT on C6, should changed to LEFT as soon as it
|
|
* known in which pin that is in order for consistency */
|
|
ldr r0, =GPIOC
|
|
mov r1, #0
|
|
str r1, [r0, #0x400] /* set pin to output */
|
|
|
|
ldr r1, [r0, #256] /* 1<<(6+2) */
|
|
cmp r1, #0 /* C6 low means button pressed */
|
|
beq boot_of
|
|
#elif defined(SANSA_M200V4)
|
|
.set row, (1<<5) /* enable output on A5 */
|
|
.set col, (1<<0) /* read keyscan column A0 */
|
|
|
|
ldr r0, =GPIOA
|
|
mov r1, #row
|
|
str r1, [r0, #0x400]
|
|
str r1, [r0, #(4*row)]
|
|
|
|
ldr r2, [r0, #(4*col)]
|
|
|
|
/* check value read (1 means button pressed) */
|
|
cmp r2, #0
|
|
bne boot_of
|
|
#else
|
|
#error No target-specific key check defined!
|
|
#endif
|
|
|
|
|
|
/* The dualboot button was not held, so we boot rockbox */
|
|
ldr r0, ucl_rb_end /* Address of compressed image */
|
|
ldr r1, ucl_rb_size /* Compressed size */
|
|
b decompress
|
|
|
|
boot_of:
|
|
ldr r0, ucl_of_end /* Address of compressed image */
|
|
ldr r1, ucl_of_size /* Compressed size */
|
|
|
|
|
|
decompress:
|
|
/* At this point: */
|
|
/* r5 = entry point (plus one for thumb) of uclunpack function */
|
|
/* r3 = destination_end for copy of UCL image */
|
|
/* r0 = source_end for UCL image to copy */
|
|
/* r1 = size of UCL image to copy */
|
|
|
|
sub r4, r3, r1 /* r4 := destination_start - 1 */
|
|
|
|
fw_copy:
|
|
ldrb r2, [r0], #-1
|
|
strb r2, [r3], #-1
|
|
cmp r3, r4 /* Stop when we reached dest_start-1 */
|
|
bne fw_copy
|
|
|
|
/* Call the ucl decompress function, which will branch to 0x0 */
|
|
/* on completion */
|
|
add r0, r3, #1 /* r0 := Start of compressed image */
|
|
/* r1 already contains compressed size */
|
|
mov r2, #0 /* r2 := Destination for unpacking */
|
|
bx r5 /* Branch to uclunpack, switching to thumb */
|
|
|
|
/* never reached : uclunpack will branch to the reset vector (0x0) */
|