| Magnus Damm | 13fa551 | 2009-10-29 10:52:31 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Migo-R 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(migor_sdram_enter_start) |
| 23 | |
| 24 | /* SBSC: disable power down and put in self-refresh mode */ |
| 25 | mov.l 1f, r4 |
| 26 | mov.l 2f, r1 |
| 27 | mov.l @r4, r2 |
| 28 | or r1, r2 |
| 29 | mov.l 3f, r3 |
| 30 | and r3, r2 |
| 31 | mov.l r2, @r4 |
| 32 | |
| 33 | rts |
| 34 | nop |
| 35 | |
| 36 | .balign 4 |
| 37 | 1: .long 0xfe400008 /* SDCR0 */ |
| 38 | 2: .long 0x00000400 |
| 39 | 3: .long 0xffff7fff |
| 40 | ENTRY(migor_sdram_enter_end) |
| 41 | |
| 42 | .balign 4 |
| 43 | ENTRY(migor_sdram_leave_start) |
| 44 | |
| 45 | /* SBSC: set auto-refresh mode */ |
| 46 | mov.l 1f, r4 |
| 47 | mov.l @r4, r0 |
| 48 | mov.l 4f, r1 |
| 49 | and r1, r0 |
| 50 | mov.l r0, @r4 |
| 51 | mov.l 6f, r4 |
| 52 | mov.l 8f, r0 |
| 53 | mov.l @r4, r1 |
| 54 | mov #-1, r4 |
| 55 | add r4, r1 |
| 56 | or r1, r0 |
| 57 | mov.l 7f, r1 |
| 58 | mov.l r0, @r1 |
| 59 | |
| 60 | rts |
| 61 | nop |
| 62 | |
| 63 | .balign 4 |
| 64 | 1: .long 0xfe400008 /* SDCR0 */ |
| 65 | 4: .long 0xfffffbff |
| 66 | 6: .long 0xfe40001c /* RTCOR */ |
| 67 | 7: .long 0xfe400018 /* RTCNT */ |
| 68 | 8: .long 0xa55a0000 |
| 69 | ENTRY(migor_sdram_leave_end) |