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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | /* * linux/arch/arm/mach-omap1/sleep.S * * Low-level OMAP7XX/1510/1610 sleep/wakeUp support * * Initial SA1110 code: * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com> * * Adapted for PXA by Nicolas Pitre: * Copyright (c) 2002 Monta Vista Software, Inc. * * Support for OMAP1510/1610 by Dirk Behme <dirk.behme@de.bosch.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/linkage.h> #include <asm/assembler.h> #include "hardware.h" #include "iomap.h" #include "pm.h" .text /* * Forces OMAP into deep sleep state * * omapXXXX_cpu_suspend() * * The values of the registers ARM_IDLECT1 and ARM_IDLECT2 are passed * as arg0 and arg1 from caller. arg0 is stored in register r0 and arg1 * in register r1. * * Note: This code get's copied to internal SRAM at boot. When the OMAP * wakes up it continues execution at the point it went to sleep. * * Note: Because of errata work arounds we have processor specific functions * here. They are mostly the same, but slightly different. * */ #ifdef CONFIG_ARCH_OMAP15XX .align 3 ENTRY(omap1510_cpu_suspend) @ save registers on stack stmfd sp!, {r0 - r12, lr} @ load base address of Traffic Controller mov r4, #TCMIF_ASM_BASE & 0xff000000 orr r4, r4, #TCMIF_ASM_BASE & 0x00ff0000 orr r4, r4, #TCMIF_ASM_BASE & 0x0000ff00 @ work around errata of OMAP1510 PDE bit for TC shut down @ clear PDE bit ldr r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] bic r5, r5, #PDE_BIT & 0xff str r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] @ set PWD_EN bit and r5, r5, #PWD_EN_BIT & 0xff str r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] @ prepare to put SDRAM into self-refresh manually ldr r5, [r4, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] orr r5, r5, #SELF_REFRESH_MODE & 0xff000000 orr r5, r5, #SELF_REFRESH_MODE & 0x000000ff str r5, [r4, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] @ prepare to put EMIFS to Sleep ldr r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] orr r5, r5, #IDLE_EMIFS_REQUEST & 0xff str r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] @ load base address of ARM_IDLECT1 and ARM_IDLECT2 mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 @ turn off clock domains mov r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff orr r5, r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff00 strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] @ request ARM idle mov r3, #OMAP1510_DEEP_SLEEP_REQUEST & 0xff orr r3, r3, #OMAP1510_DEEP_SLEEP_REQUEST & 0xff00 strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] mov r5, #IDLE_WAIT_CYCLES & 0xff orr r5, r5, #IDLE_WAIT_CYCLES & 0xff00 l_1510_2: subs r5, r5, #1 bne l_1510_2 /* * Let's wait for the next wake up event to wake us up. r0 can't be * used here because r0 holds ARM_IDLECT1 */ mov r2, #0 mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt /* * omap1510_cpu_suspend()'s resume point. * * It will just start executing here, so we'll restore stuff from the * stack, reset the ARM_IDLECT1 and ARM_IDLECT2. */ strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] @ restore regs and return ldmfd sp!, {r0 - r12, pc} ENTRY(omap1510_cpu_suspend_sz) .word . - omap1510_cpu_suspend #endif /* CONFIG_ARCH_OMAP15XX */ #if defined(CONFIG_ARCH_OMAP16XX) .align 3 ENTRY(omap1610_cpu_suspend) @ save registers on stack stmfd sp!, {r0 - r12, lr} @ Drain write cache mov r4, #0 mcr p15, 0, r0, c7, c10, 4 nop @ Load base address of Traffic Controller mov r6, #TCMIF_ASM_BASE & 0xff000000 orr r6, r6, #TCMIF_ASM_BASE & 0x00ff0000 orr r6, r6, #TCMIF_ASM_BASE & 0x0000ff00 @ Prepare to put SDRAM into self-refresh manually ldr r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] orr r9, r7, #SELF_REFRESH_MODE & 0xff000000 orr r9, r9, #SELF_REFRESH_MODE & 0x000000ff str r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] @ Prepare to put EMIFS to Sleep ldr r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] orr r9, r8, #IDLE_EMIFS_REQUEST & 0xff str r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] @ Load base address of ARM_IDLECT1 and ARM_IDLECT2 mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 @ Turn off clock domains @ Do not disable PERCK (0x04) mov r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff orr r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00 strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] @ Request ARM idle mov r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff orr r3, r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff00 strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] /* * Let's wait for the next wake up event to wake us up. r0 can't be * used here because r0 holds ARM_IDLECT1 */ mov r2, #0 mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt @ Errata (HEL3SU467, section 1.4.4) specifies nop-instructions @ according to this formula: @ 2 + (4*DPLL_MULT)/DPLL_DIV/ARMDIV @ Max DPLL_MULT = 18 @ DPLL_DIV = 1 @ ARMDIV = 1 @ => 74 nop-instructions nop nop nop nop nop nop nop nop nop nop @10 nop nop nop nop nop nop nop nop nop nop @20 nop nop nop nop nop nop nop nop nop nop @30 nop nop nop nop nop nop nop nop nop nop @40 nop nop nop nop nop nop nop nop nop nop @50 nop nop nop nop nop nop nop nop nop nop @60 nop nop nop nop nop nop nop nop nop nop @70 nop nop nop nop @74 /* * omap1610_cpu_suspend()'s resume point. * * It will just start executing here, so we'll restore stuff from the * stack. */ @ Restore the ARM_IDLECT1 and ARM_IDLECT2. strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] @ Restore EMIFF controls str r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] str r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] @ Restore regs and return ldmfd sp!, {r0 - r12, pc} ENTRY(omap1610_cpu_suspend_sz) .word . - omap1610_cpu_suspend #endif /* CONFIG_ARCH_OMAP16XX */ |