projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 77594912 MD |
1 | /* |
| 2 | * arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S | |
| 3 | * | |
| 4 | * Sleep mode and Standby modes support for SuperH Mobile | |
| 5 | * | |
| 6 | * Copyright (C) 2009 Magnus Damm | |
| 7 | * | |
| 8 | * This file is subject to the terms and conditions of the GNU General Public | |
| 9 | * License. See the file "COPYING" in the main directory of this archive | |
| 10 | * for more details. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/sys.h> | |
| 14 | #include <linux/errno.h> | |
| 15 | #include <linux/linkage.h> | |
| 16 | #include <asm/asm-offsets.h> | |
| 17 | #include <asm/suspend.h> | |
| 18 | ||
| 19 | /* manage self-refresh and enter standby mode. | |
| 20 | * this code will be copied to on-chip memory and executed from there. | |
| 21 | */ | |
| 22 | ||
| 23 | .balign 4096,0,4096 | |
| 24 | ENTRY(sh_mobile_standby) | |
| 25 | mov r4, r0 | |
| 26 | ||
| 27 | tst #SUSP_SH_SF, r0 | |
| 28 | bt skip_set_sf | |
| 237674e0 MD |
29 | #ifdef CONFIG_CPU_SUBTYPE_SH7724 |
| 30 | /* DBSC: put memory in self-refresh mode */ | |
| 77594912 | 31 | |
| 237674e0 MD |
32 | mov.l dben_reg, r4 |
| 33 | mov.l dben_data0, r1 | |
| 34 | mov.l r1, @r4 | |
| 35 | ||
| 36 | mov.l dbrfpdn0_reg, r4 | |
| 37 | mov.l dbrfpdn0_data0, r1 | |
| 38 | mov.l r1, @r4 | |
| 39 | ||
| 40 | mov.l dbcmdcnt_reg, r4 | |
| 41 | mov.l dbcmdcnt_data0, r1 | |
| 42 | mov.l r1, @r4 | |
| 43 | ||
| 44 | mov.l dbcmdcnt_reg, r4 | |
| 45 | mov.l dbcmdcnt_data1, r1 | |
| 46 | mov.l r1, @r4 | |
| 47 | ||
| 48 | mov.l dbrfpdn0_reg, r4 | |
| 49 | mov.l dbrfpdn0_data1, r1 | |
| 50 | mov.l r1, @r4 | |
| 51 | #else | |
| 52 | /* SBSC: disable power down and put in self-refresh mode */ | |
| 77594912 MD |
53 | mov.l 1f, r4 |
| 54 | mov.l 2f, r1 | |
| 55 | mov.l @r4, r2 | |
| 56 | or r1, r2 | |
| 57 | mov.l 3f, r3 | |
| 58 | and r3, r2 | |
| 59 | mov.l r2, @r4 | |
| 237674e0 | 60 | #endif |
| 77594912 MD |
61 | |
| 62 | skip_set_sf: | |
| 63 | tst #SUSP_SH_SLEEP, r0 | |
| 64 | bt test_standby | |
| 65 | ||
| 66 | /* set mode to "sleep mode" */ | |
| 67 | bra do_sleep | |
| 68 | mov #0x00, r1 | |
| 69 | ||
| 70 | test_standby: | |
| 71 | tst #SUSP_SH_STANDBY, r0 | |
| 72 | bt test_rstandby | |
| 73 | ||
| 74 | /* set mode to "software standby mode" */ | |
| 75 | bra do_sleep | |
| 76 | mov #0x80, r1 | |
| 77 | ||
| 78 | test_rstandby: | |
| 79 | tst #SUSP_SH_RSTANDBY, r0 | |
| 80 | bt test_ustandby | |
| 81 | ||
| 82 | /* set mode to "r-standby mode" */ | |
| 83 | bra do_sleep | |
| 84 | mov #0x20, r1 | |
| 85 | ||
| 86 | test_ustandby: | |
| 87 | tst #SUSP_SH_USTANDBY, r0 | |
| 88 | bt done_sleep | |
| 89 | ||
| 90 | /* set mode to "u-standby mode" */ | |
| 91 | mov #0x10, r1 | |
| 92 | ||
| 93 | /* fall-through */ | |
| 94 | ||
| 95 | do_sleep: | |
| 96 | /* setup and enter selected standby mode */ | |
| 97 | mov.l 5f, r4 | |
| 98 | mov.l r1, @r4 | |
| 99 | sleep | |
| 100 | ||
| 101 | done_sleep: | |
| 102 | /* reset standby mode to sleep mode */ | |
| 103 | mov.l 5f, r4 | |
| 104 | mov #0x00, r1 | |
| 105 | mov.l r1, @r4 | |
| 106 | ||
| 107 | tst #SUSP_SH_SF, r0 | |
| 108 | bt skip_restore_sf | |
| 109 | ||
| 237674e0 MD |
110 | #ifdef CONFIG_CPU_SUBTYPE_SH7724 |
| 111 | /* DBSC: put memory in auto-refresh mode */ | |
| 112 | ||
| 113 | mov.l dbrfpdn0_reg, r4 | |
| 114 | mov.l dbrfpdn0_data0, r1 | |
| 115 | mov.l r1, @r4 | |
| 116 | ||
| 117 | /* sleep 140 ns */ | |
| 118 | nop | |
| 119 | nop | |
| 120 | nop | |
| 121 | nop | |
| 122 | ||
| 123 | mov.l dbcmdcnt_reg, r4 | |
| 124 | mov.l dbcmdcnt_data0, r1 | |
| 125 | mov.l r1, @r4 | |
| 126 | ||
| 127 | mov.l dbcmdcnt_reg, r4 | |
| 128 | mov.l dbcmdcnt_data1, r1 | |
| 129 | mov.l r1, @r4 | |
| 130 | ||
| 131 | mov.l dben_reg, r4 | |
| 132 | mov.l dben_data1, r1 | |
| 133 | mov.l r1, @r4 | |
| 134 | ||
| 135 | mov.l dbrfpdn0_reg, r4 | |
| 136 | mov.l dbrfpdn0_data2, r1 | |
| 137 | mov.l r1, @r4 | |
| 138 | #else | |
| 139 | /* SBSC: set auto-refresh mode */ | |
| 77594912 MD |
140 | mov.l 1f, r4 |
| 141 | mov.l @r4, r2 | |
| 142 | mov.l 4f, r3 | |
| 143 | and r3, r2 | |
| 144 | mov.l r2, @r4 | |
| 145 | mov.l 6f, r4 | |
| 146 | mov.l 7f, r1 | |
| 147 | mov.l 8f, r2 | |
| 148 | mov.l @r4, r3 | |
| 149 | mov #-1, r4 | |
| 150 | add r4, r3 | |
| 151 | or r2, r3 | |
| 152 | mov.l r3, @r1 | |
| 237674e0 | 153 | #endif |
| 77594912 MD |
154 | skip_restore_sf: |
| 155 | rts | |
| 156 | nop | |
| 157 | ||
| 158 | .balign 4 | |
| 237674e0 MD |
159 | #ifdef CONFIG_CPU_SUBTYPE_SH7724 |
| 160 | dben_reg: .long 0xfd000010 /* DBEN */ | |
| 161 | dben_data0: .long 0 | |
| 162 | dben_data1: .long 1 | |
| 163 | dbrfpdn0_reg: .long 0xfd000040 /* DBRFPDN0 */ | |
| 164 | dbrfpdn0_data0: .long 0 | |
| 165 | dbrfpdn0_data1: .long 1 | |
| 166 | dbrfpdn0_data2: .long 0x00010000 | |
| 167 | dbcmdcnt_reg: .long 0xfd000014 /* DBCMDCNT */ | |
| 168 | dbcmdcnt_data0: .long 2 | |
| 169 | dbcmdcnt_data1: .long 4 | |
| 170 | #else | |
| 77594912 MD |
171 | 1: .long 0xfe400008 /* SDCR0 */ |
| 172 | 2: .long 0x00000400 | |
| 173 | 3: .long 0xffff7fff | |
| 174 | 4: .long 0xfffffbff | |
| 237674e0 | 175 | #endif |
| 77594912 MD |
176 | 5: .long 0xa4150020 /* STBCR */ |
| 177 | 6: .long 0xfe40001c /* RTCOR */ | |
| 178 | 7: .long 0xfe400018 /* RTCNT */ | |
| 179 | 8: .long 0xa55a0000 | |
| 180 | ||
| 181 | /* interrupt vector @ 0x600 */ | |
| 182 | .balign 0x400,0,0x400 | |
| 183 | .long 0xdeadbeef | |
| 184 | .balign 0x200,0,0x200 | |
| 185 | /* sh7722 will end up here in sleep mode */ | |
| 186 | rte | |
| 187 | nop | |
| 188 | sh_mobile_standby_end: | |
| 189 | ||
| 190 | ENTRY(sh_mobile_standby_size) | |
| 191 | .long sh_mobile_standby_end - sh_mobile_standby |