mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 16:39:35 +00:00
131 lines
2.9 KiB
ArmAsm
131 lines
2.9 KiB
ArmAsm
/*
|
|
* (C) Copyright 2008
|
|
* Mark Jonas <mark.jonas@de.bosch.com>
|
|
*
|
|
* (C) Copyright 2007
|
|
* Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
|
|
*
|
|
* board/mpr2/lowlevel_init.S
|
|
*
|
|
* 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
|
|
*/
|
|
#include <asm/macro.h>
|
|
|
|
.global lowlevel_init
|
|
|
|
.text
|
|
.align 2
|
|
|
|
lowlevel_init:
|
|
|
|
/*
|
|
* Set frequency multipliers and dividers in FRQCR.
|
|
*/
|
|
write16 WTCSR_A, WTCSR_D
|
|
|
|
write16 WTCNT_A, WTCNT_D
|
|
|
|
write16 FRQCR_A, FRQCR_D
|
|
|
|
/*
|
|
* Setup CS0 (Flash).
|
|
*/
|
|
write32 CS0BCR_A, CS0BCR_D
|
|
|
|
write32 CS0WCR_A, CS0WCR_D
|
|
|
|
/*
|
|
* Setup CS3 (SDRAM).
|
|
*/
|
|
write32 CS3BCR_A, CS3BCR_D
|
|
|
|
write32 CS3WCR_A, CS3WCR_D
|
|
|
|
write32 SDCR_A, SDCR_D1
|
|
|
|
write32 RTCSR_A, RTCSR_D
|
|
|
|
write32 RTCNT_A, RTCNT_D
|
|
|
|
write32 RTCOR_A, RTCOR_D
|
|
|
|
write32 SDCR_A, SDCR_D2
|
|
|
|
mov.l SDMR3_A, r1
|
|
mov.l SDMR3_D, r0
|
|
add r0, r1
|
|
mov #0, r0
|
|
mov.w r0, @r1
|
|
|
|
rts
|
|
nop
|
|
|
|
.align 4
|
|
|
|
/*
|
|
* Configuration for MPR2 A.3 through A.7
|
|
*/
|
|
|
|
/*
|
|
* PLL Settings
|
|
*/
|
|
FRQCR_D: .word 0x1103 /* I:B:P=8:4:2 */
|
|
WTCNT_D: .word 0x5A00 /* start counting at zero */
|
|
WTCSR_D: .word 0xA507 /* divide by 4096 */
|
|
.align 2
|
|
/*
|
|
* Spansion S29GL256N11 @ 48 MHz
|
|
*/
|
|
/* 1 idle cycle inserted, normal space, 16 bit */
|
|
CS0BCR_D: .long 0x12490400
|
|
/* tSW=0.5ck, 6 wait cycles, NO external wait, tHW=0.5ck */
|
|
CS0WCR_D: .long 0x00000340
|
|
|
|
/*
|
|
* Samsung K4S511632B-UL75 @ 48 MHz
|
|
* Micron MT48LC32M16A2-75 @ 48 MHz
|
|
*/
|
|
/* CS3BCR = 0x10004400, minimum idle cycles, SDRAM, 16 bit */
|
|
CS3BCR_D: .long 0x10004400
|
|
/* tRP=1ck, tRCD=1ck, CL=2, tRWL=2ck, tRC=4ck */
|
|
CS3WCR_D: .long 0x00000091
|
|
/* no refresh, 13 rows, 10 cols, NO bank active mode */
|
|
SDCR_D1: .long 0x00000012
|
|
SDCR_D2: .long 0x00000812 /* refresh */
|
|
RTCSR_D: .long 0xA55A0008 /* 1/4, once */
|
|
RTCNT_D: .long 0xA55A005D /* count 93 */
|
|
RTCOR_D: .long 0xa55a005d /* count 93 */
|
|
/* mode register CL2, burst read and SINGLE WRITE */
|
|
SDMR3_D: .long 0x440
|
|
|
|
/*
|
|
* Registers
|
|
*/
|
|
|
|
FRQCR_A: .long 0xA415FF80
|
|
WTCNT_A: .long 0xA415FF84
|
|
WTCSR_A: .long 0xA415FF86
|
|
|
|
#define BSC_BASE 0xA4FD0000
|
|
CS0BCR_A: .long BSC_BASE + 0x04
|
|
CS3BCR_A: .long BSC_BASE + 0x0C
|
|
CS0WCR_A: .long BSC_BASE + 0x24
|
|
CS3WCR_A: .long BSC_BASE + 0x2C
|
|
SDCR_A: .long BSC_BASE + 0x44
|
|
RTCSR_A: .long BSC_BASE + 0x48
|
|
RTCNT_A: .long BSC_BASE + 0x4C
|
|
RTCOR_A: .long BSC_BASE + 0x50
|
|
SDMR3_A: .long BSC_BASE + 0x5000
|