/*
|
* MS7724SE sdram self/auto-refresh setup code
|
*
|
* Copyright (C) 2009 Magnus Damm
|
*
|
* This file is subject to the terms and conditions of the GNU General Public
|
* License. See the file "COPYING" in the main directory of this archive
|
* for more details.
|
*/
|
|
#include <linux/sys.h>
|
#include <linux/errno.h>
|
#include <linux/linkage.h>
|
#include <asm/asm-offsets.h>
|
#include <asm/suspend.h>
|
#include <asm/romimage-macros.h>
|
|
/* code to enter and leave self-refresh. must be self-contained.
|
* this code will be copied to on-chip memory and executed from there.
|
*/
|
.balign 4
|
ENTRY(ms7724se_sdram_enter_start)
|
|
/* DBSC: put memory in self-refresh mode */
|
|
ED 0xFD000010, 0x00000000 /* DBEN */
|
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
|
|
rts
|
nop
|
|
ENTRY(ms7724se_sdram_enter_end)
|
|
.balign 4
|
ENTRY(ms7724se_sdram_leave_start)
|
|
/* DBSC: put memory in auto-refresh mode */
|
|
mov.l @(SH_SLEEP_MODE, r5), r0
|
tst #SUSP_SH_RSTANDBY, r0
|
bf resume_rstandby
|
|
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
|
WAIT 1
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
ED 0xFD000010, 0x00000001 /* DBEN */
|
ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
|
|
rts
|
nop
|
|
resume_rstandby:
|
|
/* CPG: setup clocks before restarting external memory */
|
|
ED 0xA4150024, 0x00004000 /* PLLCR */
|
|
mov.l FRQCRA,r0
|
mov.l @r0,r3
|
mov.l KICK,r1
|
or r1, r3
|
mov.l r3, @r0
|
|
mov.l LSTATS,r0
|
mov #1,r1
|
WAIT_LSTATS:
|
mov.l @r0,r3
|
tst r1,r3
|
bf WAIT_LSTATS
|
|
/* DBSC: re-initialize and put in auto-refresh */
|
|
ED 0xFD000108, 0x00000181 /* DBPDCNT0 */
|
ED 0xFD000020, 0x015B0002 /* DBCONF */
|
ED 0xFD000030, 0x03071502 /* DBTR0 */
|
ED 0xFD000034, 0x02020102 /* DBTR1 */
|
ED 0xFD000038, 0x01090405 /* DBTR2 */
|
ED 0xFD00003C, 0x00000002 /* DBTR3 */
|
ED 0xFD000008, 0x00000005 /* DBKIND */
|
ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
|
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
|
ED 0xFD000018, 0x00000001 /* DBCKECNT */
|
|
mov #100,r0
|
WAIT_400NS:
|
dt r0
|
bf WAIT_400NS
|
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */
|
ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */
|
ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */
|
ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */
|
ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */
|
ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */
|
|
mov #100,r0
|
WAIT_400NS_2:
|
dt r0
|
bf WAIT_400NS_2
|
|
ED 0xFD000010, 0x00000001 /* DBEN */
|
ED 0xFD000044, 0x0000050f /* DBRFPDN1 */
|
ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */
|
|
mov.l DUMMY,r0
|
mov.l @r0, r1 /* force single dummy read */
|
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
ED 0xFD000108, 0x00000080 /* DBPDCNT0 */
|
ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
|
|
rts
|
nop
|
|
.balign 4
|
DUMMY: .long 0xac400000
|
FRQCRA: .long 0xa4150000
|
KICK: .long 0x80000000
|
LSTATS: .long 0xa4150060
|
|
ENTRY(ms7724se_sdram_leave_end)
|
