Commit | Line | Data |
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eb0cd9e8 MD |
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 | |
22 | ENTRY(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 | ||
35 | ENTRY(ecovec24_sdram_enter_end) | |
36 | ||
37 | .balign 4 | |
38 | ENTRY(ecovec24_sdram_leave_start) | |
39 | ||
2839bd61 MD |
40 | mov.l @(SH_SLEEP_MODE, r5), r0 |
41 | tst #SUSP_SH_RSTANDBY, r0 | |
42 | bf resume_rstandby | |
43 | ||
eb0cd9e8 MD |
44 | /* DBSC: put memory in auto-refresh mode */ |
45 | ||
46 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ | |
47 | WAIT 1 | |
48 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
49 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
50 | ED 0xFD000010, 0x00000001 /* DBEN */ | |
51 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ | |
52 | ||
53 | rts | |
54 | nop | |
55 | ||
2839bd61 MD |
56 | resume_rstandby: |
57 | ||
58 | /* DBSC: re-initialize and put in auto-refresh */ | |
59 | ||
60 | ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ | |
61 | ED 0xFD000020, 0x015B0002 /* DBCONF */ | |
62 | ED 0xFD000030, 0x03071502 /* DBTR0 */ | |
63 | ED 0xFD000034, 0x02020102 /* DBTR1 */ | |
64 | ED 0xFD000038, 0x01090405 /* DBTR2 */ | |
65 | ED 0xFD00003C, 0x00000002 /* DBTR3 */ | |
66 | ED 0xFD000008, 0x00000005 /* DBKIND */ | |
67 | ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ | |
68 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ | |
69 | ED 0xFD000018, 0x00000001 /* DBCKECNT */ | |
70 | ||
71 | mov #100,r0 | |
72 | WAIT_400NS: | |
73 | dt r0 | |
74 | bf WAIT_400NS | |
75 | ||
76 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
77 | ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ | |
78 | ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ | |
79 | ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ | |
80 | ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ | |
81 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
82 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
83 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
84 | ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ | |
85 | ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ | |
86 | ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ | |
87 | ||
88 | mov #100,r0 | |
89 | WAIT_400NS_2: | |
90 | dt r0 | |
91 | bf WAIT_400NS_2 | |
92 | ||
93 | ED 0xFD000010, 0x00000001 /* DBEN */ | |
94 | ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ | |
95 | ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ | |
96 | ||
97 | mov.l DUMMY,r0 | |
98 | mov.l @r0, r1 /* force single dummy read */ | |
99 | ||
100 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
101 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
102 | ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ | |
103 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ | |
104 | ||
105 | rts | |
106 | nop | |
107 | ||
108 | .balign 4 | |
109 | DUMMY: .long 0xac400000 | |
110 | ||
eb0cd9e8 | 111 | ENTRY(ecovec24_sdram_leave_end) |