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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 mov.l @(SH_SLEEP_MODE, r5), r0
41 tst #SUSP_SH_RSTANDBY, r0
42 bf resume_rstandby
43
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
56resume_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
72WAIT_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
89WAIT_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
109DUMMY: .long 0xac400000
110
111ENTRY(ecovec24_sdram_leave_end)
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 mov.l @(SH_SLEEP_MODE, r5), r0
41 tst #SUSP_SH_RSTANDBY, r0
42 bf resume_rstandby
43
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
56resume_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
72WAIT_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
89WAIT_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
109DUMMY: .long 0xac400000
110
111ENTRY(ecovec24_sdram_leave_end)