1/*
2 * Ecovec24 sdram self/auto-refresh setup code
3 *
4 *  Copyright (C) 2009 Magnus Damm
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License.  See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11#include <linux/sys.h>
12#include <linux/errno.h>
13#include <linux/linkage.h>
14#include <asm/asm-offsets.h>
15#include <asm/suspend.h>
16#include <asm/romimage-macros.h>
17
18/* code to enter and leave self-refresh. must be self-contained.
19 * this code will be copied to on-chip memory and executed from there.
20 */
21	.balign 4
22ENTRY(ecovec24_sdram_enter_start)
23
24	/* DBSC: put memory in self-refresh mode */
25
26	ED 0xFD000010, 0x00000000 /* DBEN */
27	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
28	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
29	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
30	ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
31
32	rts
33	 nop
34
35ENTRY(ecovec24_sdram_enter_end)
36
37	.balign 4
38ENTRY(ecovec24_sdram_leave_start)
39
40	/* DBSC: put memory in auto-refresh mode */
41
42	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
43	WAIT 1
44	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
45	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
46	ED 0xFD000010, 0x00000001 /* DBEN */
47	ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
48
49	rts
50	 nop
51
52ENTRY(ecovec24_sdram_leave_end)
53