linux/arch/sh/boards/mach-se/7724/sdram.S

/* SPDX-License-Identifier: GPL-2.0
 *
 * MS7724SE sdram self/auto-refresh setup code
 *
 *  Copyright (C) 2009 Magnus Damm
 */

#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)
sh: boards: convert to SPDX identifiers Update license to use SPDX-License-Identifier instead of verbose license text. Link: http://lkml.kernel.org/r/87in08ct0n.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2018-12-28 00:31:46 -08:00			`/* SPDX-License-Identifier: GPL-2.0`
			`*`
sh: Add ms7724se specific memory pre/post sleep code Add self-refresh handling code for the MS7724SE board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 2009-10-29 10:52:23 +00:00			`* MS7724SE sdram self/auto-refresh setup code`
			`*`
			`* Copyright (C) 2009 Magnus Damm`
			`*/`

			`#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 */`

sh: ms7724se r-standby support This patch adds board specific r-standby resume code for ms7724se. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 2010-02-25 11:06:02 +00:00			`mov.l @(SH_SLEEP_MODE, r5), r0`
			`tst #SUSP_SH_RSTANDBY, r0`
			`bf resume_rstandby`

sh: Add ms7724se specific memory pre/post sleep code Add self-refresh handling code for the MS7724SE board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 2009-10-29 10:52:23 +00:00			`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`

sh: ms7724se r-standby support This patch adds board specific r-standby resume code for ms7724se. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 2010-02-25 11:06:02 +00:00			`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`

sh: Add ms7724se specific memory pre/post sleep code Add self-refresh handling code for the MS7724SE board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 2009-10-29 10:52:23 +00:00			`ENTRY(ms7724se_sdram_leave_end)`