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/*
* (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
*/
.global lowlevel_init
.text
.align 2
lowlevel_init:
/*
* Set frequency multipliers and dividers in FRQCR.
*/
mov.l WTCSR_A,r1
mov.l WTCSR_D,r0
mov.w r0,@r1
mov.l WTCNT_A,r1
mov.l WTCNT_D,r0
mov.w r0,@r1
mov.l FRQCR_A,r1
mov.l FRQCR_D,r0
mov.w r0,@r1
/*
* Setup CS0 (Flash).
*/
mov.l CS0BCR_A, r1
mov.l CS0BCR_D, r0
mov.l r0, @r1
mov.l CS0WCR_A, r1
mov.l CS0WCR_D, r0
mov.l r0, @r1
/*
* Setup CS3 (SDRAM).
*/
mov.l CS3BCR_A, r1
mov.l CS3BCR_D, r0
mov.l r0, @r1
mov.l CS3WCR_A, r1
mov.l CS3WCR_D, r0
mov.l r0, @r1
mov.l SDCR_A, r1
mov.l SDCR_D1, r0
mov.l r0, @r1
mov.l RTCSR_A, r1
mov.l RTCSR_D, r0
mov.l r0, @r1
mov.l RTCNT_A, r1
mov.l RTCNT_D, r0
mov.l r0, @r1
mov.l RTCOR_A, r1
mov.l RTCOR_D, r0
mov.l r0, @r1
mov.l SDCR_A, r1
mov.l SDCR_D2, r0
mov.l r0, @r1
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: .long 0x1103 /* I:B:P=8:4:2 */
WTCNT_D: .long 0x5A00 /* start counting at zero */
WTCSR_D: .long 0xA507 /* divide by 4096 */
/*
* Spansion S29GL256N11 @ 48 MHz
*/
CS0BCR_D: .long 0x12490400 /* 1 idle cycle inserted, normal space, 16 bit */
CS0WCR_D: .long 0x00000340 /* tSW=0.5ck, 6 wait cycles, NO external wait, tHW=0.5ck */
/*
* Samsung K4S511632B-UL75 @ 48 MHz
* Micron MT48LC32M16A2-75 @ 48 MHz
*/
CS3BCR_D: .long 0x10004400 /* CS3BCR = 0x10004400, minimum idle cycles, SDRAM, 16 bit */
CS3WCR_D: .long 0x00000091 /* tRP=1ck, tRCD=1ck, CL=2, tRWL=2ck, tRC=4ck */
SDCR_D1: .long 0x00000012 /* no refresh, 13 rows, 10 cols, NO bank active mode */
SDCR_D2: .long 0x00000812 /* refresh */
RTCSR_D: .long 0xA55A0008 /* 1/4, once */
RTCNT_D: .long 0xA55A005D /* count 93 */
RTCOR_D: .long 0xa55a005d /* count 93 */
SDMR3_D: .long 0x440 /* mode register CL2, burst read and SINGLE WRITE */
/*
* 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
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