forked from luck/tmp_suning_uos_patched
93 lines
2.2 KiB
ArmAsm
93 lines
2.2 KiB
ArmAsm
|
/*
|
||
|
|
* linux/arch/arm/boot/compressed/head-sharpsl.S
|
||
|
|
*
|
||
|
|
* Copyright (C) 2004-2005 Richard Purdie <rpurdie@rpsys.net>
|
||
|
|
*
|
||
|
|
* Sharp's bootloader doesn't pass any kind of machine ID
|
||
|
|
* so we have to figure out the machine for ourselves...
|
||
|
|
*
|
||
|
|
* Support for Poodle, Corgi (SL-C700), Shepherd (SL-C750)
|
||
|
|
* and Husky (SL-C760).
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/config.h>
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <asm/mach-types.h>
|
||
|
|
|
||
|
|
#ifndef CONFIG_PXA_SHARPSL
|
||
|
|
#error What am I doing here...
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.section ".start", "ax"
|
||
|
|
|
||
|
|
__SharpSL_start:
|
||
|
|
|
||
|
|
ldr r1, .W100ADDR @ Base address of w100 chip + regs offset
|
||
|
|
|
||
|
|
mov r6, #0x31 @ Load Magic Init value
|
||
|
|
str r6, [r1, #0x280] @ to SCRATCH_UMSK
|
||
|
|
mov r5, #0x3000
|
||
|
|
.W100LOOP:
|
||
|
|
subs r5, r5, #1
|
||
|
|
bne .W100LOOP
|
||
|
|
mov r6, #0x30 @ Load 2nd Magic Init value
|
||
|
|
str r6, [r1, #0x280] @ to SCRATCH_UMSK
|
||
|
|
|
||
|
|
ldr r6, [r1, #0] @ Load Chip ID
|
||
|
|
ldr r3, .W100ID
|
||
|
|
ldr r7, .POODLEID
|
||
|
|
cmp r6, r3
|
||
|
|
bne .SHARPEND @ We have no w100 - Poodle
|
||
|
|
|
||
|
|
mrc p15, 0, r6, c0, c0 @ Get Processor ID
|
||
|
|
and r6, r6, #0xffffff00
|
||
|
|
ldr r7, .CORGIID
|
||
|
|
ldr r3, .PXA255ID
|
||
|
|
cmp r6, r3
|
||
|
|
blo .SHARPEND @ We have a PXA250 - Corgi
|
||
|
|
|
||
|
|
mov r1, #0x0c000000 @ Base address of NAND chip
|
||
|
|
ldrb r3, [r1, #24] @ Load FLASHCTL
|
||
|
|
bic r3, r3, #0x11 @ SET NCE
|
||
|
|
orr r3, r3, #0x0a @ SET CLR + FLWP
|
||
|
|
strb r3, [r1, #24] @ Save to FLASHCTL
|
||
|
|
mov r2, #0x90 @ Command "readid"
|
||
|
|
strb r2, [r1, #20] @ Save to FLASHIO
|
||
|
|
bic r3, r3, #2 @ CLR CLE
|
||
|
|
orr r3, r3, #4 @ SET ALE
|
||
|
|
strb r3, [r1, #24] @ Save to FLASHCTL
|
||
|
|
mov r2, #0 @ Address 0x00
|
||
|
|
strb r2, [r1, #20] @ Save to FLASHIO
|
||
|
|
bic r3, r3, #4 @ CLR ALE
|
||
|
|
strb r3, [r1, #24] @ Save to FLASHCTL
|
||
|
|
.SHARP1:
|
||
|
|
ldrb r3, [r1, #24] @ Load FLASHCTL
|
||
|
|
tst r3, #32 @ Is chip ready?
|
||
|
|
beq .SHARP1
|
||
|
|
ldrb r2, [r1, #20] @ NAND Manufacturer ID
|
||
|
|
ldrb r3, [r1, #20] @ NAND Chip ID
|
||
|
|
ldr r7, .SHEPHERDID
|
||
|
|
cmp r3, #0x76 @ 64MiB flash
|
||
|
|
beq .SHARPEND @ We have Shepherd
|
||
|
|
ldr r7, .HUSKYID @ Must be Husky
|
||
|
|
b .SHARPEND
|
||
|
|
|
||
|
|
.PXA255ID:
|
||
|
|
.word 0x69052d00 @ PXA255 Processor ID
|
||
|
|
.W100ID:
|
||
|
|
.word 0x57411002 @ w100 Chip ID
|
||
|
|
.W100ADDR:
|
||
|
|
.word 0x08010000 @ w100 Chip ID Reg Address
|
||
|
|
.POODLEID:
|
||
|
|
.word MACH_TYPE_POODLE
|
||
|
|
.CORGIID:
|
||
|
|
.word MACH_TYPE_CORGI
|
||
|
|
.SHEPHERDID:
|
||
|
|
.word MACH_TYPE_SHEPHERD
|
||
|
|
.HUSKYID:
|
||
|
|
.word MACH_TYPE_HUSKY
|
||
|
|
.SHARPEND:
|
||
|
|
|
||
|
|
|