sh: Add Ecovec24 specific memory pre/post sleep code
Add self-refresh handling code for the Ecovec24 board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -6,4 +6,4 @@
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# for more details.
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#
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obj-y := setup.o
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obj-y := setup.o sdram.o
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52
arch/sh/boards/mach-ecovec24/sdram.S
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52
arch/sh/boards/mach-ecovec24/sdram.S
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/*
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* Ecovec24 sdram self/auto-refresh setup code
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*
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* Copyright (C) 2009 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/sys.h>
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#include <linux/errno.h>
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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#include <asm/suspend.h>
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#include <asm/romimage-macros.h>
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/* code to enter and leave self-refresh. must be self-contained.
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* this code will be copied to on-chip memory and executed from there.
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*/
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.balign 4
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ENTRY(ecovec24_sdram_enter_start)
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/* DBSC: put memory in self-refresh mode */
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ED 0xFD000010, 0x00000000 /* DBEN */
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ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
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ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
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ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
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ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
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rts
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nop
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ENTRY(ecovec24_sdram_enter_end)
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.balign 4
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ENTRY(ecovec24_sdram_leave_start)
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/* DBSC: put memory in auto-refresh mode */
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ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
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WAIT 1
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ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
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ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
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ED 0xFD000010, 0x00000001 /* DBEN */
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ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
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rts
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nop
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ENTRY(ecovec24_sdram_leave_end)
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@ -26,6 +26,7 @@
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#include <asm/sh_eth.h>
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#include <asm/sh_keysc.h>
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#include <asm/clock.h>
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#include <asm/suspend.h>
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#include <cpu/sh7724.h>
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/*
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@ -526,8 +527,21 @@ static void __init sh_eth_init(struct sh_eth_plat_data *pd)
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#define PORT_HIZA 0xA4050158
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#define IODRIVEA 0xA405018A
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extern char ecovec24_sdram_enter_start;
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extern char ecovec24_sdram_enter_end;
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extern char ecovec24_sdram_leave_start;
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extern char ecovec24_sdram_leave_end;
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static int __init arch_setup(void)
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{
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/* register board specific self-refresh code */
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sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
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&ecovec24_sdram_enter_start,
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&ecovec24_sdram_enter_end,
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&ecovec24_sdram_leave_start,
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&ecovec24_sdram_leave_end);
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/* enable STATUS0, STATUS2 and PDSTATUS */
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gpio_request(GPIO_FN_STATUS0, NULL);
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gpio_request(GPIO_FN_STATUS2, NULL);
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