mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 01:04:08 +08:00
6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
151 lines
3.5 KiB
ArmAsm
151 lines
3.5 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)
|
|
* Husky (SL-C760), Tosa (SL-C6000), Spitz (SL-C3000),
|
|
* Akita (SL-C1000) and Borzoi (SL-C3100).
|
|
*
|
|
*/
|
|
|
|
#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:
|
|
|
|
/* Check for TC6393 - if found we have a Tosa */
|
|
ldr r7, .TOSAID
|
|
mov r1, #0x10000000 @ Base address of TC6393 chip
|
|
mov r6, #0x03
|
|
ldrh r3, [r1, #8] @ Load TC6393XB Revison: This is 0x0003
|
|
cmp r6, r3
|
|
beq .SHARPEND @ Success -> tosa
|
|
|
|
/* Check for pxa270 - if found, branch */
|
|
mrc p15, 0, r4, c0, c0 @ Get Processor ID
|
|
and r4, r4, #0xffffff00
|
|
ldr r3, .PXA270ID
|
|
cmp r4, r3
|
|
beq .PXA270
|
|
|
|
/* Check for w100 - if not found we have a Poodle */
|
|
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
|
|
|
|
/* Check for pxa250 - if found we have a Corgi */
|
|
ldr r7, .CORGIID
|
|
ldr r3, .PXA255ID
|
|
cmp r4, r3
|
|
blo .SHARPEND @ We have a PXA250 - Corgi
|
|
|
|
/* Check for 64MiB flash - if found we have a Shepherd */
|
|
bl get_flash_ids
|
|
ldr r7, .SHEPHERDID
|
|
cmp r3, #0x76 @ 64MiB flash
|
|
beq .SHARPEND @ We have Shepherd
|
|
|
|
/* Must be a Husky */
|
|
ldr r7, .HUSKYID @ Must be Husky
|
|
b .SHARPEND
|
|
|
|
.PXA270:
|
|
/* Check for 16MiB flash - if found we have Spitz */
|
|
bl get_flash_ids
|
|
ldr r7, .SPITZID
|
|
cmp r3, #0x73 @ 16MiB flash
|
|
beq .SHARPEND @ We have Spitz
|
|
|
|
/* Check for a second SCOOP chip - if found we have Borzoi */
|
|
ldr r1, .SCOOP2ADDR
|
|
ldr r7, .BORZOIID
|
|
mov r6, #0x0140
|
|
strh r6, [r1]
|
|
ldrh r6, [r1]
|
|
cmp r6, #0x0140
|
|
beq .SHARPEND @ We have Borzoi
|
|
|
|
/* Must be Akita */
|
|
ldr r7, .AKITAID
|
|
b .SHARPEND @ We have Borzoi
|
|
|
|
.PXA255ID:
|
|
.word 0x69052d00 @ PXA255 Processor ID
|
|
.PXA270ID:
|
|
.word 0x69054100 @ PXA270 Processor ID
|
|
.W100ID:
|
|
.word 0x57411002 @ w100 Chip ID
|
|
.W100ADDR:
|
|
.word 0x08010000 @ w100 Chip ID Reg Address
|
|
.SCOOP2ADDR:
|
|
.word 0x08800040
|
|
.POODLEID:
|
|
.word MACH_TYPE_POODLE
|
|
.CORGIID:
|
|
.word MACH_TYPE_CORGI
|
|
.SHEPHERDID:
|
|
.word MACH_TYPE_SHEPHERD
|
|
.HUSKYID:
|
|
.word MACH_TYPE_HUSKY
|
|
.TOSAID:
|
|
.word MACH_TYPE_TOSA
|
|
.SPITZID:
|
|
.word MACH_TYPE_SPITZ
|
|
.AKITAID:
|
|
.word MACH_TYPE_AKITA
|
|
.BORZOIID:
|
|
.word MACH_TYPE_BORZOI
|
|
|
|
/*
|
|
* Return: r2 - NAND Manufacturer ID
|
|
* r3 - NAND Chip ID
|
|
* Corrupts: r1
|
|
*/
|
|
get_flash_ids:
|
|
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
|
|
.fids1:
|
|
ldrb r3, [r1, #24] @ Load FLASHCTL
|
|
tst r3, #32 @ Is chip ready?
|
|
beq .fids1
|
|
ldrb r2, [r1, #20] @ NAND Manufacturer ID
|
|
ldrb r3, [r1, #20] @ NAND Chip ID
|
|
mov pc, lr
|
|
|
|
.SHARPEND:
|