From: Magnus Damm <magnus.damm@gmail.com>
To: linux-sh@vger.kernel.org
Subject: [PATCH] sh: ecovec r-standby support
Date: Thu, 25 Feb 2010 11:07:52 +0000 [thread overview]
Message-ID: <20100225110752.6872.31582.sendpatchset@t400s> (raw)
From: Magnus Damm <damm@opensource.se>
This patch adds board specific r-standby resume code
for ecovec.
Signed-off-by: Magnus Damm <damm@opensource.se>
---
arch/sh/boards/mach-ecovec24/sdram.S | 59 ++++++++++++++++++++++++++++++++++
arch/sh/boards/mach-ecovec24/setup.c | 3 +
2 files changed, 61 insertions(+), 1 deletion(-)
--- 0001/arch/sh/boards/mach-ecovec24/sdram.S
+++ work/arch/sh/boards/mach-ecovec24/sdram.S 2010-02-25 19:14:57.000000000 +0900
@@ -37,6 +37,10 @@ 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 */
@@ -49,4 +53,59 @@ ENTRY(ecovec24_sdram_leave_start)
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)
--- 0001/arch/sh/boards/mach-ecovec24/setup.c
+++ work/arch/sh/boards/mach-ecovec24/setup.c 2010-02-25 19:21:46.000000000 +0900
@@ -829,7 +829,8 @@ static int __init arch_setup(void)
struct clk *clk;
/* register board specific self-refresh code */
- sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF |
+ SUSP_SH_RSTANDBY,
&ecovec24_sdram_enter_start,
&ecovec24_sdram_enter_end,
&ecovec24_sdram_leave_start,
reply other threads:[~2010-02-25 11:07 UTC|newest]
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