|
|
|
|
|
/*
|
|
|
|
|
|
* (C) Copyright 2002
|
|
|
|
|
|
* Daniel Engstr<EFBFBD>m, Omicron Ceti AB <daniel@omicron.se>.
|
|
|
|
|
|
*
|
|
|
|
|
|
* See file CREDITS for list of people who contributed to this
|
|
|
|
|
|
* project.
|
|
|
|
|
|
*
|
|
|
|
|
|
* 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 program is distributed in the hope that it will be useful,
|
|
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
|
|
*
|
|
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
|
|
|
|
* MA 02111-1307 USA
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/* now setup the General purpose bus to give us access to the LEDs.
|
|
|
|
|
|
* We can then use the leds to display status information.
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
sc520_cdp_registers:
|
|
|
|
|
|
/* size offset value */
|
|
|
|
|
|
.word 1 ; .word 0x040 ; .long 0x00 /* SDRAM buffer control */
|
|
|
|
|
|
.word 2 ; .word 0xc08 ; .long 0x0001 /* GP CS offset */
|
|
|
|
|
|
.word 2 ; .word 0xc09 ; .long 0x0003 /* GP CS width */
|
|
|
|
|
|
.word 2 ; .word 0xc0a ; .long 0x0001 /* GP CS width */
|
|
|
|
|
|
.word 2 ; .word 0xc0b ; .long 0x0003 /* GP RD pulse width */
|
|
|
|
|
|
.word 2 ; .word 0xc0c ; .long 0x0001 /* GP RD offse */
|
|
|
|
|
|
.word 2 ; .word 0xc0d ; .long 0x0003 /* GP WR pulse width */
|
|
|
|
|
|
.word 2 ; .word 0xc0e ; .long 0x0001 /* GP WR offset */
|
|
|
|
|
|
.word 2 ; .word 0xc2c ; .long 0x0000 /* GPIO directionreg */
|
|
|
|
|
|
.word 2 ; .word 0xc2a ; .long 0x0000 /* GPIO directionreg */
|
|
|
|
|
|
.word 2 ; .word 0xc22 ; .long 0xffff /* GPIO pin function 31-16 reg */
|
|
|
|
|
|
.word 2 ; .word 0xc20 ; .long 0xffff /* GPIO pin function 15-0 reg */
|
|
|
|
|
|
.word 2 ; .word 0x0c4 ; .long 0x28000680 /* PAR 15 for access to led 680 */
|
|
|
|
|
|
.word 0 ; .word 0x000 ; .long 0x00
|
|
|
|
|
|
|
|
|
|
|
|
/* board early intialization */
|
|
|
|
|
|
.globl early_board_init
|
|
|
|
|
|
early_board_init:
|
|
|
|
|
|
movl $sc520_cdp_registers,%esi
|
|
|
|
|
|
init_loop:
|
|
|
|
|
|
movl $0xfffef000,%edi /* MMCR base to edi */
|
|
|
|
|
|
movw (%esi), %bx /* load sizer to bx */
|
|
|
|
|
|
cmpw $0, %bx /* if sie is 0 we're done */
|
|
|
|
|
|
je done
|
|
|
|
|
|
xorl %edx,%edx
|
|
|
|
|
|
movw 2(%esi), %dx /* load MMCR offset to dx */
|
|
|
|
|
|
addl %edx, %edi /* add offset to base in edi */
|
|
|
|
|
|
movl 4(%esi), %eax /* load value in eax */
|
|
|
|
|
|
cmpw $1, %bx
|
|
|
|
|
|
je byte /* byte op? */
|
|
|
|
|
|
cmpw $2, %bx
|
|
|
|
|
|
je word /* word op? */
|
|
|
|
|
|
movl %eax, (%edi) /* must be long, then */
|
|
|
|
|
|
jmp next
|
|
|
|
|
|
byte: movb %al,(%edi)
|
|
|
|
|
|
jmp next
|
|
|
|
|
|
word: movw %ax,(%edi)
|
|
|
|
|
|
next: addl $8, %esi /* advance esi */
|
|
|
|
|
|
jmp init_loop
|
|
|
|
|
|
|
|
|
|
|
|
/* the leds ad 0x80 and 0x680 should now work */
|
|
|
|
|
|
done: movb $0x88, %al
|
|
|
|
|
|
out %al, $0x80
|
|
|
|
|
|
movw $0x680, %dx
|
|
|
|
|
|
out %al, %dx
|
|
|
|
|
|
|
|
|
|
|
|
jmp *%ebp /* return to caller */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.globl __show_boot_progress
|
|
|
|
|
|
__show_boot_progress:
|
|
|
|
|
|
out %al, $0x80
|
|
|
|
|
|
xchg %al, %ah
|
|
|
|
|
|
movw $0x680, %dx
|
|
|
|
|
|
out %al, %dx
|
|
|
|
|
|
jmp *%ebp
|
