| Magnus Damm | eb0cd9e | 2009-10-30 04:23:59 +0000 | [diff] [blame] | 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 | |
| 40 | /* DBSC: put memory in auto-refresh mode */ |
| 41 | |
| 42 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| 43 | WAIT 1 |
| 44 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| 45 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| 46 | ED 0xFD000010, 0x00000001 /* DBEN */ |
| 47 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
| 48 | |
| 49 | rts |
| 50 | nop |
| 51 | |
| 52 | ENTRY(ecovec24_sdram_leave_end) |