1 /* SPDX-License-Identifier: GPL-2.0
2 *
3 * KFR2R09 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(kfr2r09_sdram_enter_start)
20
21 /* DBSC: put memory in self-refresh mo
22
23 ED 0xFD000010, 0x00000000 /* DBEN */
24 ED 0xFD000040, 0x00000000 /* DBRFPDN0
25 ED 0xFD000014, 0x00000002 /* DBCMDCNT
26 ED 0xFD000014, 0x00000004 /* DBCMDCNT
27 ED 0xFD000040, 0x00000001 /* DBRFPDN0
28
29 rts
30 nop
31
32 ENTRY(kfr2r09_sdram_enter_end)
33
34 .balign 4
35 ENTRY(kfr2r09_sdram_leave_start)
36
37 /* DBSC: put memory in auto-refresh mo
38
39 mov.l @(SH_SLEEP_MODE, r5), r0
40 tst #SUSP_SH_RSTANDBY, r0
41 bf resume_rstandby
42
43 ED 0xFD000040, 0x00000000 /* DBRFPDN0
44 WAIT 1
45 ED 0xFD000014, 0x00000002 /* DBCMDCNT
46 ED 0xFD000014, 0x00000004 /* DBCMDCNT
47 ED 0xFD000010, 0x00000001 /* DBEN */
48 ED 0xFD000040, 0x00010000 /* DBRFPDN0
49
50 rts
51 nop
52
53 resume_rstandby:
54
55 /* DBSC: re-initialize and put in auto
56
57 ED 0xFD000108, 0x40000301 /* DBPDCNT0
58 ED 0xFD000020, 0x011B0002 /* DBCONF */
59 ED 0xFD000030, 0x03060E02 /* DBTR0 */
60 ED 0xFD000034, 0x01020102 /* DBTR1 */
61 ED 0xFD000038, 0x01090406 /* DBTR2 */
62 ED 0xFD000008, 0x00000004 /* DBKIND */
63 ED 0xFD000040, 0x00000001 /* DBRFPDN0
64 ED 0xFD000040, 0x00000000 /* DBRFPDN0
65 ED 0xFD000018, 0x00000001 /* DBCKECNT
66 WAIT 1
67 ED 0xFD000010, 0x00000001 /* DBEN */
68 ED 0xFD000044, 0x000004AF /* DBRFPDN1
69 ED 0xFD000048, 0x20CF0037 /* DBRFPDN2
70 ED 0xFD000014, 0x00000004 /* DBCMDCNT
71 ED 0xFD000108, 0x40000300 /* DBPDCNT0
72 ED 0xFD000040, 0x00010000 /* DBRFPDN0
73
74 rts
75 nop
76
77 ENTRY(kfr2r09_sdram_leave_end)
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