| 1 | /* SPDX-License-Identifier: GPL-2.0 |
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| 2 | * |
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| 3 | * KFR2R09 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(kfr2r09_sdram_enter_start) |
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| 20 | |
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| 21 | /* DBSC: put memory in self-refresh mode */ |
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| 22 | |
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| 23 | ED 0xFD000010, 0x00000000 /* DBEN */ |
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| 24 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
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| 25 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
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| 26 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
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| 27 | ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ |
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| 28 | |
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| 29 | rts |
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| 30 | nop |
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| 31 | |
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| 32 | ENTRY(kfr2r09_sdram_enter_end) |
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| 33 | |
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| 34 | .balign 4 |
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| 35 | ENTRY(kfr2r09_sdram_leave_start) |
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| 36 | |
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| 37 | /* DBSC: put memory in auto-refresh mode */ |
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| 38 | |
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| 39 | mov.l @(SH_SLEEP_MODE, r5), r0 |
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| 40 | tst #SUSP_SH_RSTANDBY, r0 |
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| 41 | bf resume_rstandby |
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| 42 | |
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| 43 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
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| 44 | WAIT 1 |
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| 45 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
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| 46 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
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| 47 | ED 0xFD000010, 0x00000001 /* DBEN */ |
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| 48 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
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| 49 | |
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| 50 | rts |
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| 51 | nop |
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| 52 | |
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| 53 | resume_rstandby: |
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| 54 | |
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| 55 | /* DBSC: re-initialize and put in auto-refresh */ |
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| 56 | |
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| 57 | ED 0xFD000108, 0x40000301 /* DBPDCNT0 */ |
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| 58 | ED 0xFD000020, 0x011B0002 /* DBCONF */ |
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| 59 | ED 0xFD000030, 0x03060E02 /* DBTR0 */ |
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| 60 | ED 0xFD000034, 0x01020102 /* DBTR1 */ |
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| 61 | ED 0xFD000038, 0x01090406 /* DBTR2 */ |
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| 62 | ED 0xFD000008, 0x00000004 /* DBKIND */ |
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| 63 | ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ |
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| 64 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
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| 65 | ED 0xFD000018, 0x00000001 /* DBCKECNT */ |
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| 66 | WAIT 1 |
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| 67 | ED 0xFD000010, 0x00000001 /* DBEN */ |
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| 68 | ED 0xFD000044, 0x000004AF /* DBRFPDN1 */ |
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| 69 | ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */ |
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| 70 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
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| 71 | ED 0xFD000108, 0x40000300 /* DBPDCNT0 */ |
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| 72 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
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| 73 | |
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| 74 | rts |
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| 75 | nop |
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| 76 | |
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| 77 | ENTRY(kfr2r09_sdram_leave_end) |
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| 78 | |
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