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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/sh/boards/mach-ecovec24/sdram.S | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
| download | FOSSEE-netbook-kernel-source-97327692361306d1e6259021bc425e32832fdb50.tar.gz FOSSEE-netbook-kernel-source-97327692361306d1e6259021bc425e32832fdb50.tar.bz2 FOSSEE-netbook-kernel-source-97327692361306d1e6259021bc425e32832fdb50.zip | |
dirty fix to merging
Diffstat (limited to 'arch/sh/boards/mach-ecovec24/sdram.S')
| -rw-r--r-- | arch/sh/boards/mach-ecovec24/sdram.S | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-ecovec24/sdram.S b/arch/sh/boards/mach-ecovec24/sdram.S new file mode 100644 index 00000000..3963c6f2 --- /dev/null +++ b/arch/sh/boards/mach-ecovec24/sdram.S @@ -0,0 +1,111 @@ +/* + * Ecovec24 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(ecovec24_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(ecovec24_sdram_enter_end) + + .balign 4 +ENTRY(ecovec24_sdram_leave_start) + + mov.l @(SH_SLEEP_MODE, r5), r0 + tst #SUSP_SH_RSTANDBY, r0 + bf resume_rstandby + + /* DBSC: put memory in auto-refresh mode */ + + 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: + + /* 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 + +ENTRY(ecovec24_sdram_leave_end) |