| 1 | /* SPDX-License-Identifier: GPL-2.0 |
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| 2 | * |
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| 3 | * Migo-R sdram self/auto-refresh setup code |
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| 4 | * |
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| 5 | * Copyright (C) 2009 Magnus Damm |
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| 6 | */ |
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| 7 | |
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| 8 | #include <linux/sys.h> |
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| 9 | #include <linux/errno.h> |
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| 10 | #include <linux/linkage.h> |
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| 11 | #include <asm/asm-offsets.h> |
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| 12 | #include <asm/suspend.h> |
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| 13 | #include <asm/romimage-macros.h> |
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| 14 | |
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| 15 | /* code to enter and leave self-refresh. must be self-contained. |
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| 16 | * this code will be copied to on-chip memory and executed from there. |
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| 17 | */ |
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| 18 | .balign 4 |
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| 19 | ENTRY(migor_sdram_enter_start) |
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| 20 | |
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| 21 | /* SBSC: disable power down and put in self-refresh mode */ |
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| 22 | mov.l 1f, r4 |
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| 23 | mov.l 2f, r1 |
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| 24 | mov.l @r4, r2 |
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| 25 | or r1, r2 |
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| 26 | mov.l 3f, r3 |
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| 27 | and r3, r2 |
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| 28 | mov.l r2, @r4 |
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| 29 | |
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| 30 | rts |
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| 31 | nop |
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| 32 | |
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| 33 | .balign 4 |
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| 34 | 1: .long 0xfe400008 /* SDCR0 */ |
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| 35 | 2: .long 0x00000400 |
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| 36 | 3: .long 0xffff7fff |
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| 37 | ENTRY(migor_sdram_enter_end) |
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| 38 | |
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| 39 | .balign 4 |
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| 40 | ENTRY(migor_sdram_leave_start) |
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| 41 | |
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| 42 | /* SBSC: set auto-refresh mode */ |
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| 43 | mov.l 1f, r4 |
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| 44 | mov.l @r4, r0 |
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| 45 | mov.l 4f, r1 |
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| 46 | and r1, r0 |
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| 47 | mov.l r0, @r4 |
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| 48 | mov.l 6f, r4 |
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| 49 | mov.l 8f, r0 |
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| 50 | mov.l @r4, r1 |
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| 51 | mov #-1, r4 |
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| 52 | add r4, r1 |
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| 53 | or r1, r0 |
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| 54 | mov.l 7f, r1 |
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| 55 | mov.l r0, @r1 |
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| 56 | |
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| 57 | rts |
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| 58 | nop |
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| 59 | |
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| 60 | .balign 4 |
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| 61 | 1: .long 0xfe400008 /* SDCR0 */ |
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| 62 | 4: .long 0xfffffbff |
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| 63 | 6: .long 0xfe40001c /* RTCOR */ |
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| 64 | 7: .long 0xfe400018 /* RTCNT */ |
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| 65 | 8: .long 0xa55a0000 |
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| 66 | ENTRY(migor_sdram_leave_end) |
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| 67 | |
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