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 be self-contained. |
16 | * this code will be copied to on-chip memory and executed from there. |
17 | */ |
18 | .balign 4 |
19 | ENTRY(kfr2r09_sdram_enter_start) |
20 | |
21 | /* DBSC: put memory in self-refresh mode */ |
22 | |
23 | ED 0xFD000010, 0x00000000 /* DBEN */ |
24 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
25 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
26 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
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 mode */ |
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 (PALL) */ |
46 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
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-refresh */ |
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 (REF) */ |
71 | ED 0xFD000108, 0x40000300 /* DBPDCNT0 */ |
72 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
73 | |
74 | rts |
75 | nop |
76 | |
77 | ENTRY(kfr2r09_sdram_leave_end) |
78 | |