projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| aaf9128a KM |
1 | /* SPDX-License-Identifier: GPL-2.0 |
| 2 | * | |
| 3b9f2952 MD |
3 | * MS7724SE sdram self/auto-refresh setup code |
| 4 | * | |
| 5 | * Copyright (C) 2009 Magnus Damm | |
| 3b9f2952 MD |
6 | */ |
| 7 | ||
| 8 | #include <linux/sys.h> | |
| 9 | #include <linux/errno.h> | |
| 10 | #include <linux/linkage.h> | |
| 11 | #include <asm/asm-offsets.h> | |
| 12 | #include <asm/suspend.h> | |
| 13 | #include <asm/romimage-macros.h> | |
| 14 | ||
| 15 | /* code to enter and leave self-refresh. must be self-contained. | |
| 16 | * this code will be copied to on-chip memory and executed from there. | |
| 17 | */ | |
| 18 | .balign 4 | |
| 19 | ENTRY(ms7724se_sdram_enter_start) | |
| 20 | ||
| 21 | /* DBSC: put memory in self-refresh mode */ | |
| 22 | ||
| 23 | ED 0xFD000010, 0x00000000 /* DBEN */ | |
| 24 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ | |
| 25 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
| 26 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
| 27 | ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ | |
| 28 | ||
| 29 | rts | |
| 30 | nop | |
| 31 | ||
| 32 | ENTRY(ms7724se_sdram_enter_end) | |
| 33 | ||
| 34 | .balign 4 | |
| 35 | ENTRY(ms7724se_sdram_leave_start) | |
| 36 | ||
| 37 | /* DBSC: put memory in auto-refresh mode */ | |
| 38 | ||
| b67cf284 MD |
39 | mov.l @(SH_SLEEP_MODE, r5), r0 |
| 40 | tst #SUSP_SH_RSTANDBY, r0 | |
| 41 | bf resume_rstandby | |
| 42 | ||
| 3b9f2952 MD |
43 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| 44 | WAIT 1 | |
| 45 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
| 46 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
| 47 | ED 0xFD000010, 0x00000001 /* DBEN */ | |
| 48 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ | |
| 49 | ||
| 50 | rts | |
| 51 | nop | |
| 52 | ||
| b67cf284 MD |
53 | resume_rstandby: |
| 54 | ||
| 55 | /* CPG: setup clocks before restarting external memory */ | |
| 56 | ||
| 57 | ED 0xA4150024, 0x00004000 /* PLLCR */ | |
| 58 | ||
| 59 | mov.l FRQCRA,r0 | |
| 60 | mov.l @r0,r3 | |
| 61 | mov.l KICK,r1 | |
| 62 | or r1, r3 | |
| 63 | mov.l r3, @r0 | |
| 64 | ||
| 65 | mov.l LSTATS,r0 | |
| 66 | mov #1,r1 | |
| 67 | WAIT_LSTATS: | |
| 68 | mov.l @r0,r3 | |
| 69 | tst r1,r3 | |
| 70 | bf WAIT_LSTATS | |
| 71 | ||
| 72 | /* DBSC: re-initialize and put in auto-refresh */ | |
| 73 | ||
| 74 | ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ | |
| 75 | ED 0xFD000020, 0x015B0002 /* DBCONF */ | |
| 76 | ED 0xFD000030, 0x03071502 /* DBTR0 */ | |
| 77 | ED 0xFD000034, 0x02020102 /* DBTR1 */ | |
| 78 | ED 0xFD000038, 0x01090405 /* DBTR2 */ | |
| 79 | ED 0xFD00003C, 0x00000002 /* DBTR3 */ | |
| 80 | ED 0xFD000008, 0x00000005 /* DBKIND */ | |
| 81 | ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ | |
| 82 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ | |
| 83 | ED 0xFD000018, 0x00000001 /* DBCKECNT */ | |
| 84 | ||
| 85 | mov #100,r0 | |
| 86 | WAIT_400NS: | |
| 87 | dt r0 | |
| 88 | bf WAIT_400NS | |
| 89 | ||
| 90 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
| 91 | ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ | |
| 92 | ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ | |
| 93 | ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ | |
| 94 | ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ | |
| 95 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
| 96 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
| 97 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
| 98 | ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ | |
| 99 | ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ | |
| 100 | ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ | |
| 101 | ||
| 102 | mov #100,r0 | |
| 103 | WAIT_400NS_2: | |
| 104 | dt r0 | |
| 105 | bf WAIT_400NS_2 | |
| 106 | ||
| 107 | ED 0xFD000010, 0x00000001 /* DBEN */ | |
| 108 | ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ | |
| 109 | ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ | |
| 110 | ||
| 111 | mov.l DUMMY,r0 | |
| 112 | mov.l @r0, r1 /* force single dummy read */ | |
| 113 | ||
| 114 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ | |
| 115 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ | |
| 116 | ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ | |
| 117 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ | |
| 118 | ||
| 119 | rts | |
| 120 | nop | |
| 121 | ||
| 122 | .balign 4 | |
| 123 | DUMMY: .long 0xac400000 | |
| 124 | FRQCRA: .long 0xa4150000 | |
| 125 | KICK: .long 0x80000000 | |
| 126 | LSTATS: .long 0xa4150060 | |
| 127 | ||
| 3b9f2952 | 128 | ENTRY(ms7724se_sdram_leave_end) |