1 /* SPDX-License-Identifier: GPL-2.0
2 *
3 * AP325RXA sdram self/auto-refresh setup code
4 *
5 * Copyright (C) 2009 Magnus Damm
6 */
7
8 #include <linux/sys.h>
9 #include <linux/errno.h>
10 #include <linux/linkage.h>
11 #include <asm/asm-offsets.h>
12 #include <asm/suspend.h>
13 #include <asm/romimage-macros.h>
14
15 /* code to enter and leave self-refresh. must
16 * this code will be copied to on-chip memory
17 */
18 .balign 4
19 ENTRY(ap325rxa_sdram_enter_start)
20
21 /* SBSC: disable power down and put in
22 mov.l 1f, r4
23 mov.l 2f, r1
24 mov.l @r4, r2
25 or r1, r2
26 mov.l 3f, r3
27 and r3, r2
28 mov.l r2, @r4
29
30 rts
31 nop
32
33 .balign 4
34 1: .long 0xfe400008 /* SDCR0 */
35 2: .long 0x00000400
36 3: .long 0xffff7fff
37 ENTRY(ap325rxa_sdram_enter_end)
38
39 .balign 4
40 ENTRY(ap325rxa_sdram_leave_start)
41
42 /* SBSC: set auto-refresh mode */
43 mov.l 1f, r4
44 mov.l @r4, r0
45 mov.l 4f, r1
46 and r1, r0
47 mov.l r0, @r4
48 mov.l 6f, r4
49 mov.l 8f, r0
50 mov.l @r4, r1
51 mov #-1, r4
52 add r4, r1
53 or r1, r0
54 mov.l 7f, r1
55 mov.l r0, @r1
56
57 rts
58 nop
59
60 .balign 4
61 1: .long 0xfe400008 /* SDCR0 */
62 4: .long 0xfffffbff
63 6: .long 0xfe40001c /* RTCOR */
64 7: .long 0xfe400018 /* RTCNT */
65 8: .long 0xa55a0000
66 ENTRY(ap325rxa_sdram_leave_end)
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