| Magnus Damm | 3b9f295 | 2009-10-29 10:52:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * MS7724SE 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(ms7724se_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(ms7724se_sdram_enter_end) |
| 36 | |
| 37 | .balign 4 |
| 38 | ENTRY(ms7724se_sdram_leave_start) |
| 39 | |
| 40 | /* DBSC: put memory in auto-refresh mode */ |
| 41 | |
| Magnus Damm | b67cf28 | 2010-02-25 11:06:02 +0000 | [diff] [blame] | 42 | mov.l @(SH_SLEEP_MODE, r5), r0 |
| 43 | tst #SUSP_SH_RSTANDBY, r0 |
| 44 | bf resume_rstandby |
| 45 | |
| Magnus Damm | 3b9f295 | 2009-10-29 10:52:23 +0000 | [diff] [blame] | 46 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| 47 | WAIT 1 |
| 48 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| 49 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| 50 | ED 0xFD000010, 0x00000001 /* DBEN */ |
| 51 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
| 52 | |
| 53 | rts |
| 54 | nop |
| 55 | |
| Magnus Damm | b67cf28 | 2010-02-25 11:06:02 +0000 | [diff] [blame] | 56 | resume_rstandby: |
| 57 | |
| 58 | /* CPG: setup clocks before restarting external memory */ |
| 59 | |
| 60 | ED 0xA4150024, 0x00004000 /* PLLCR */ |
| 61 | |
| 62 | mov.l FRQCRA,r0 |
| 63 | mov.l @r0,r3 |
| 64 | mov.l KICK,r1 |
| 65 | or r1, r3 |
| 66 | mov.l r3, @r0 |
| 67 | |
| 68 | mov.l LSTATS,r0 |
| 69 | mov #1,r1 |
| 70 | WAIT_LSTATS: |
| 71 | mov.l @r0,r3 |
| 72 | tst r1,r3 |
| 73 | bf WAIT_LSTATS |
| 74 | |
| 75 | /* DBSC: re-initialize and put in auto-refresh */ |
| 76 | |
| 77 | ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ |
| 78 | ED 0xFD000020, 0x015B0002 /* DBCONF */ |
| 79 | ED 0xFD000030, 0x03071502 /* DBTR0 */ |
| 80 | ED 0xFD000034, 0x02020102 /* DBTR1 */ |
| 81 | ED 0xFD000038, 0x01090405 /* DBTR2 */ |
| 82 | ED 0xFD00003C, 0x00000002 /* DBTR3 */ |
| 83 | ED 0xFD000008, 0x00000005 /* DBKIND */ |
| 84 | ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ |
| 85 | ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| 86 | ED 0xFD000018, 0x00000001 /* DBCKECNT */ |
| 87 | |
| 88 | mov #100,r0 |
| 89 | WAIT_400NS: |
| 90 | dt r0 |
| 91 | bf WAIT_400NS |
| 92 | |
| 93 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| 94 | ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ |
| 95 | ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ |
| 96 | ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ |
| 97 | ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ |
| 98 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| 99 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| 100 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| 101 | ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ |
| 102 | ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ |
| 103 | ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ |
| 104 | |
| 105 | mov #100,r0 |
| 106 | WAIT_400NS_2: |
| 107 | dt r0 |
| 108 | bf WAIT_400NS_2 |
| 109 | |
| 110 | ED 0xFD000010, 0x00000001 /* DBEN */ |
| 111 | ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ |
| 112 | ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ |
| 113 | |
| 114 | mov.l DUMMY,r0 |
| 115 | mov.l @r0, r1 /* force single dummy read */ |
| 116 | |
| 117 | ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| 118 | ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| 119 | ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ |
| 120 | ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
| 121 | |
| 122 | rts |
| 123 | nop |
| 124 | |
| 125 | .balign 4 |
| 126 | DUMMY: .long 0xac400000 |
| 127 | FRQCRA: .long 0xa4150000 |
| 128 | KICK: .long 0x80000000 |
| 129 | LSTATS: .long 0xa4150060 |
| 130 | |
| Magnus Damm | 3b9f295 | 2009-10-29 10:52:23 +0000 | [diff] [blame] | 131 | ENTRY(ms7724se_sdram_leave_end) |