1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun * 3*4882a593Smuzhiyun * Migo-R sdram self/auto-refresh setup code 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2009 Magnus Damm 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun#include <linux/sys.h> 9*4882a593Smuzhiyun#include <linux/errno.h> 10*4882a593Smuzhiyun#include <linux/linkage.h> 11*4882a593Smuzhiyun#include <asm/asm-offsets.h> 12*4882a593Smuzhiyun#include <asm/suspend.h> 13*4882a593Smuzhiyun#include <asm/romimage-macros.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun/* code to enter and leave self-refresh. must be self-contained. 16*4882a593Smuzhiyun * this code will be copied to on-chip memory and executed from there. 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun .balign 4 19*4882a593SmuzhiyunENTRY(migor_sdram_enter_start) 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* SBSC: disable power down and put in self-refresh mode */ 22*4882a593Smuzhiyun mov.l 1f, r4 23*4882a593Smuzhiyun mov.l 2f, r1 24*4882a593Smuzhiyun mov.l @r4, r2 25*4882a593Smuzhiyun or r1, r2 26*4882a593Smuzhiyun mov.l 3f, r3 27*4882a593Smuzhiyun and r3, r2 28*4882a593Smuzhiyun mov.l r2, @r4 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun rts 31*4882a593Smuzhiyun nop 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun .balign 4 34*4882a593Smuzhiyun1: .long 0xfe400008 /* SDCR0 */ 35*4882a593Smuzhiyun2: .long 0x00000400 36*4882a593Smuzhiyun3: .long 0xffff7fff 37*4882a593SmuzhiyunENTRY(migor_sdram_enter_end) 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun .balign 4 40*4882a593SmuzhiyunENTRY(migor_sdram_leave_start) 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* SBSC: set auto-refresh mode */ 43*4882a593Smuzhiyun mov.l 1f, r4 44*4882a593Smuzhiyun mov.l @r4, r0 45*4882a593Smuzhiyun mov.l 4f, r1 46*4882a593Smuzhiyun and r1, r0 47*4882a593Smuzhiyun mov.l r0, @r4 48*4882a593Smuzhiyun mov.l 6f, r4 49*4882a593Smuzhiyun mov.l 8f, r0 50*4882a593Smuzhiyun mov.l @r4, r1 51*4882a593Smuzhiyun mov #-1, r4 52*4882a593Smuzhiyun add r4, r1 53*4882a593Smuzhiyun or r1, r0 54*4882a593Smuzhiyun mov.l 7f, r1 55*4882a593Smuzhiyun mov.l r0, @r1 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun rts 58*4882a593Smuzhiyun nop 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun .balign 4 61*4882a593Smuzhiyun1: .long 0xfe400008 /* SDCR0 */ 62*4882a593Smuzhiyun4: .long 0xfffffbff 63*4882a593Smuzhiyun6: .long 0xfe40001c /* RTCOR */ 64*4882a593Smuzhiyun7: .long 0xfe400018 /* RTCNT */ 65*4882a593Smuzhiyun8: .long 0xa55a0000 66*4882a593SmuzhiyunENTRY(migor_sdram_leave_end) 67