Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1 | /* |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 2 | * linux/arch/arm/mach-omap1/sleep.S |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 3 | * |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 4 | * Low-level OMAP730/1510/1610 sleep/wakeUp support |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 5 | * |
| 6 | * Initial SA1110 code: |
| 7 | * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com> |
| 8 | * |
| 9 | * Adapted for PXA by Nicolas Pitre: |
| 10 | * Copyright (c) 2002 Monta Vista Software, Inc. |
| 11 | * |
| 12 | * Support for OMAP1510/1610 by Dirk Behme <dirk.behme@de.bosch.com> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify it |
| 15 | * under the terms of the GNU General Public License as published by the |
| 16 | * Free Software Foundation; either version 2 of the License, or (at your |
| 17 | * option) any later version. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 20 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 22 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 25 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 26 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | * |
| 30 | * You should have received a copy of the GNU General Public License along |
| 31 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 32 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/config.h> |
| 36 | #include <linux/linkage.h> |
| 37 | #include <asm/assembler.h> |
| 38 | #include <asm/arch/io.h> |
| 39 | #include <asm/arch/pm.h> |
| 40 | |
| 41 | .text |
| 42 | |
| 43 | /* |
| 44 | * Forces OMAP into idle state |
| 45 | * |
| 46 | * omapXXXX_idle_loop_suspend() |
| 47 | * |
| 48 | * Note: This code get's copied to internal SRAM at boot. When the OMAP |
| 49 | * wakes up it continues execution at the point it went to sleep. |
| 50 | * |
| 51 | * Note: Because of slightly different configuration values we have |
| 52 | * processor specific functions here. |
| 53 | */ |
| 54 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 55 | #if defined(CONFIG_ARCH_OMAP730) |
| 56 | ENTRY(omap730_idle_loop_suspend) |
| 57 | |
| 58 | stmfd sp!, {r0 - r12, lr} @ save registers on stack |
| 59 | |
| 60 | @ load base address of ARM_IDLECT1 and ARM_IDLECT2 |
| 61 | mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 |
| 62 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 |
| 63 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 |
| 64 | |
| 65 | @ turn off clock domains |
| 66 | @ get ARM_IDLECT2 into r2 |
| 67 | ldrh r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 68 | mov r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff |
| 69 | orr r5, r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff00 |
| 70 | strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 71 | |
| 72 | @ request ARM idle |
| 73 | @ get ARM_IDLECT1 into r1 |
| 74 | ldrh r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 75 | orr r3, r1, #OMAP730_IDLE_LOOP_REQUEST & 0xffff |
| 76 | strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 77 | |
| 78 | mov r5, #IDLE_WAIT_CYCLES & 0xff |
| 79 | orr r5, r5, #IDLE_WAIT_CYCLES & 0xff00 |
| 80 | l_730: subs r5, r5, #1 |
| 81 | bne l_730 |
| 82 | /* |
| 83 | * Let's wait for the next clock tick to wake us up. |
| 84 | */ |
| 85 | mov r0, #0 |
| 86 | mcr p15, 0, r0, c7, c0, 4 @ wait for interrupt |
| 87 | /* |
| 88 | * omap730_idle_loop_suspend()'s resume point. |
| 89 | * |
| 90 | * It will just start executing here, so we'll restore stuff from the |
| 91 | * stack, reset the ARM_IDLECT1 and ARM_IDLECT2. |
| 92 | */ |
| 93 | |
| 94 | @ restore ARM_IDLECT1 and ARM_IDLECT2 and return |
| 95 | @ r1 has ARM_IDLECT1 and r2 still has ARM_IDLECT2 |
| 96 | strh r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 97 | strh r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 98 | |
| 99 | ldmfd sp!, {r0 - r12, pc} @ restore regs and return |
| 100 | |
| 101 | ENTRY(omap730_idle_loop_suspend_sz) |
| 102 | .word . - omap730_idle_loop_suspend |
| 103 | #endif /* CONFIG_ARCH_OMAP730 */ |
| 104 | |
| 105 | #ifdef CONFIG_ARCH_OMAP15XX |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 106 | ENTRY(omap1510_idle_loop_suspend) |
| 107 | |
| 108 | stmfd sp!, {r0 - r12, lr} @ save registers on stack |
| 109 | |
| 110 | @ load base address of ARM_IDLECT1 and ARM_IDLECT2 |
| 111 | mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 |
| 112 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 |
| 113 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 |
| 114 | |
| 115 | @ turn off clock domains |
| 116 | @ get ARM_IDLECT2 into r2 |
| 117 | ldrh r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 118 | mov r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 119 | orr r5, r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 120 | strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 121 | |
| 122 | @ request ARM idle |
| 123 | @ get ARM_IDLECT1 into r1 |
| 124 | ldrh r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 125 | orr r3, r1, #OMAP1510_IDLE_LOOP_REQUEST & 0xffff |
| 126 | strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 127 | |
| 128 | mov r5, #IDLE_WAIT_CYCLES & 0xff |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 129 | orr r5, r5, #IDLE_WAIT_CYCLES & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 130 | l_1510: subs r5, r5, #1 |
| 131 | bne l_1510 |
| 132 | /* |
| 133 | * Let's wait for the next clock tick to wake us up. |
| 134 | */ |
| 135 | mov r0, #0 |
| 136 | mcr p15, 0, r0, c7, c0, 4 @ wait for interrupt |
| 137 | /* |
| 138 | * omap1510_idle_loop_suspend()'s resume point. |
| 139 | * |
| 140 | * It will just start executing here, so we'll restore stuff from the |
| 141 | * stack, reset the ARM_IDLECT1 and ARM_IDLECT2. |
| 142 | */ |
| 143 | |
| 144 | @ restore ARM_IDLECT1 and ARM_IDLECT2 and return |
| 145 | @ r1 has ARM_IDLECT1 and r2 still has ARM_IDLECT2 |
| 146 | strh r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 147 | strh r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 148 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 149 | ldmfd sp!, {r0 - r12, pc} @ restore regs and return |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 150 | |
| 151 | ENTRY(omap1510_idle_loop_suspend_sz) |
| 152 | .word . - omap1510_idle_loop_suspend |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 153 | #endif /* CONFIG_ARCH_OMAP15XX */ |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 154 | |
| 155 | #if defined(CONFIG_ARCH_OMAP16XX) |
| 156 | ENTRY(omap1610_idle_loop_suspend) |
| 157 | |
| 158 | stmfd sp!, {r0 - r12, lr} @ save registers on stack |
| 159 | |
| 160 | @ load base address of ARM_IDLECT1 and ARM_IDLECT2 |
| 161 | mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 |
| 162 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 |
| 163 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 |
| 164 | |
| 165 | @ turn off clock domains |
| 166 | @ get ARM_IDLECT2 into r2 |
| 167 | ldrh r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 168 | mov r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff |
| 169 | orr r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 170 | strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 171 | |
| 172 | @ request ARM idle |
| 173 | @ get ARM_IDLECT1 into r1 |
| 174 | ldrh r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 175 | orr r3, r1, #OMAP1610_IDLE_LOOP_REQUEST & 0xffff |
| 176 | strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 177 | |
| 178 | mov r5, #IDLE_WAIT_CYCLES & 0xff |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 179 | orr r5, r5, #IDLE_WAIT_CYCLES & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 180 | l_1610: subs r5, r5, #1 |
| 181 | bne l_1610 |
| 182 | /* |
| 183 | * Let's wait for the next clock tick to wake us up. |
| 184 | */ |
| 185 | mov r0, #0 |
| 186 | mcr p15, 0, r0, c7, c0, 4 @ wait for interrupt |
| 187 | /* |
| 188 | * omap1610_idle_loop_suspend()'s resume point. |
| 189 | * |
| 190 | * It will just start executing here, so we'll restore stuff from the |
| 191 | * stack, reset the ARM_IDLECT1 and ARM_IDLECT2. |
| 192 | */ |
| 193 | |
| 194 | @ restore ARM_IDLECT1 and ARM_IDLECT2 and return |
| 195 | @ r1 has ARM_IDLECT1 and r2 still has ARM_IDLECT2 |
| 196 | strh r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 197 | strh r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 198 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 199 | ldmfd sp!, {r0 - r12, pc} @ restore regs and return |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 200 | |
| 201 | ENTRY(omap1610_idle_loop_suspend_sz) |
| 202 | .word . - omap1610_idle_loop_suspend |
| 203 | #endif /* CONFIG_ARCH_OMAP16XX */ |
| 204 | |
| 205 | /* |
| 206 | * Forces OMAP into deep sleep state |
| 207 | * |
| 208 | * omapXXXX_cpu_suspend() |
| 209 | * |
| 210 | * The values of the registers ARM_IDLECT1 and ARM_IDLECT2 are passed |
| 211 | * as arg0 and arg1 from caller. arg0 is stored in register r0 and arg1 |
| 212 | * in register r1. |
| 213 | * |
| 214 | * Note: This code get's copied to internal SRAM at boot. When the OMAP |
| 215 | * wakes up it continues execution at the point it went to sleep. |
| 216 | * |
| 217 | * Note: Because of errata work arounds we have processor specific functions |
| 218 | * here. They are mostly the same, but slightly different. |
| 219 | * |
| 220 | */ |
| 221 | |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 222 | #if defined(CONFIG_ARCH_OMAP730) |
| 223 | ENTRY(omap730_cpu_suspend) |
| 224 | |
| 225 | @ save registers on stack |
| 226 | stmfd sp!, {r0 - r12, lr} |
| 227 | |
| 228 | @ Drain write cache |
| 229 | mov r4, #0 |
| 230 | mcr p15, 0, r0, c7, c10, 4 |
| 231 | nop |
| 232 | |
| 233 | @ load base address of Traffic Controller |
| 234 | mov r6, #TCMIF_ASM_BASE & 0xff000000 |
| 235 | orr r6, r6, #TCMIF_ASM_BASE & 0x00ff0000 |
| 236 | orr r6, r6, #TCMIF_ASM_BASE & 0x0000ff00 |
| 237 | |
| 238 | @ prepare to put SDRAM into self-refresh manually |
| 239 | ldr r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 240 | orr r9, r7, #SELF_REFRESH_MODE & 0xff000000 |
| 241 | orr r9, r9, #SELF_REFRESH_MODE & 0x000000ff |
| 242 | str r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 243 | |
| 244 | @ prepare to put EMIFS to Sleep |
| 245 | ldr r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 246 | orr r9, r8, #IDLE_EMIFS_REQUEST & 0xff |
| 247 | str r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 248 | |
| 249 | @ load base address of ARM_IDLECT1 and ARM_IDLECT2 |
| 250 | mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 |
| 251 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 |
| 252 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 |
| 253 | |
| 254 | @ turn off clock domains |
| 255 | @ do not disable PERCK (0x04) |
| 256 | mov r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff |
| 257 | orr r5, r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff00 |
| 258 | strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 259 | |
| 260 | @ request ARM idle |
| 261 | mov r3, #OMAP730_IDLECT1_SLEEP_VAL & 0xff |
| 262 | orr r3, r3, #OMAP730_IDLECT1_SLEEP_VAL & 0xff00 |
| 263 | strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 264 | |
| 265 | @ disable instruction cache |
| 266 | mrc p15, 0, r9, c1, c0, 0 |
| 267 | bic r2, r9, #0x1000 |
| 268 | mcr p15, 0, r2, c1, c0, 0 |
| 269 | nop |
| 270 | |
| 271 | /* |
| 272 | * Let's wait for the next wake up event to wake us up. r0 can't be |
| 273 | * used here because r0 holds ARM_IDLECT1 |
| 274 | */ |
| 275 | mov r2, #0 |
| 276 | mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt |
| 277 | /* |
| 278 | * omap730_cpu_suspend()'s resume point. |
| 279 | * |
| 280 | * It will just start executing here, so we'll restore stuff from the |
| 281 | * stack. |
| 282 | */ |
| 283 | @ re-enable Icache |
| 284 | mcr p15, 0, r9, c1, c0, 0 |
| 285 | |
| 286 | @ reset the ARM_IDLECT1 and ARM_IDLECT2. |
| 287 | strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 288 | strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 289 | |
| 290 | @ Restore EMIFF controls |
| 291 | str r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 292 | str r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 293 | |
| 294 | @ restore regs and return |
| 295 | ldmfd sp!, {r0 - r12, pc} |
| 296 | |
| 297 | ENTRY(omap730_cpu_suspend_sz) |
| 298 | .word . - omap730_cpu_suspend |
| 299 | #endif /* CONFIG_ARCH_OMAP730 */ |
| 300 | |
| 301 | #ifdef CONFIG_ARCH_OMAP15XX |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 302 | ENTRY(omap1510_cpu_suspend) |
| 303 | |
| 304 | @ save registers on stack |
| 305 | stmfd sp!, {r0 - r12, lr} |
| 306 | |
| 307 | @ load base address of Traffic Controller |
| 308 | mov r4, #TCMIF_ASM_BASE & 0xff000000 |
| 309 | orr r4, r4, #TCMIF_ASM_BASE & 0x00ff0000 |
| 310 | orr r4, r4, #TCMIF_ASM_BASE & 0x0000ff00 |
| 311 | |
| 312 | @ work around errata of OMAP1510 PDE bit for TC shut down |
| 313 | @ clear PDE bit |
| 314 | ldr r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 315 | bic r5, r5, #PDE_BIT & 0xff |
| 316 | str r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 317 | |
| 318 | @ set PWD_EN bit |
| 319 | and r5, r5, #PWD_EN_BIT & 0xff |
| 320 | str r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 321 | |
| 322 | @ prepare to put SDRAM into self-refresh manually |
| 323 | ldr r5, [r4, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 324 | orr r5, r5, #SELF_REFRESH_MODE & 0xff000000 |
| 325 | orr r5, r5, #SELF_REFRESH_MODE & 0x000000ff |
| 326 | str r5, [r4, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 327 | |
| 328 | @ prepare to put EMIFS to Sleep |
| 329 | ldr r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 330 | orr r5, r5, #IDLE_EMIFS_REQUEST & 0xff |
| 331 | str r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 332 | |
| 333 | @ load base address of ARM_IDLECT1 and ARM_IDLECT2 |
| 334 | mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 |
| 335 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 |
| 336 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 |
| 337 | |
| 338 | @ turn off clock domains |
| 339 | mov r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 340 | orr r5, r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 341 | strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 342 | |
| 343 | @ request ARM idle |
| 344 | mov r3, #OMAP1510_DEEP_SLEEP_REQUEST & 0xff |
| 345 | orr r3, r3, #OMAP1510_DEEP_SLEEP_REQUEST & 0xff00 |
| 346 | strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 347 | |
| 348 | mov r5, #IDLE_WAIT_CYCLES & 0xff |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 349 | orr r5, r5, #IDLE_WAIT_CYCLES & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 350 | l_1510_2: |
| 351 | subs r5, r5, #1 |
| 352 | bne l_1510_2 |
| 353 | /* |
| 354 | * Let's wait for the next wake up event to wake us up. r0 can't be |
| 355 | * used here because r0 holds ARM_IDLECT1 |
| 356 | */ |
| 357 | mov r2, #0 |
| 358 | mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt |
| 359 | /* |
| 360 | * omap1510_cpu_suspend()'s resume point. |
| 361 | * |
| 362 | * It will just start executing here, so we'll restore stuff from the |
| 363 | * stack, reset the ARM_IDLECT1 and ARM_IDLECT2. |
| 364 | */ |
| 365 | strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 366 | strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 367 | |
| 368 | @ restore regs and return |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 369 | ldmfd sp!, {r0 - r12, pc} |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 370 | |
| 371 | ENTRY(omap1510_cpu_suspend_sz) |
| 372 | .word . - omap1510_cpu_suspend |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 373 | #endif /* CONFIG_ARCH_OMAP15XX */ |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 374 | |
| 375 | #if defined(CONFIG_ARCH_OMAP16XX) |
| 376 | ENTRY(omap1610_cpu_suspend) |
| 377 | |
| 378 | @ save registers on stack |
| 379 | stmfd sp!, {r0 - r12, lr} |
| 380 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 381 | @ Drain write cache |
| 382 | mov r4, #0 |
| 383 | mcr p15, 0, r0, c7, c10, 4 |
| 384 | nop |
| 385 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 386 | @ Load base address of Traffic Controller |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 387 | mov r6, #TCMIF_ASM_BASE & 0xff000000 |
| 388 | orr r6, r6, #TCMIF_ASM_BASE & 0x00ff0000 |
| 389 | orr r6, r6, #TCMIF_ASM_BASE & 0x0000ff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 390 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 391 | @ Prepare to put SDRAM into self-refresh manually |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 392 | ldr r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 393 | orr r9, r7, #SELF_REFRESH_MODE & 0xff000000 |
| 394 | orr r9, r9, #SELF_REFRESH_MODE & 0x000000ff |
| 395 | str r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 396 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 397 | @ Prepare to put EMIFS to Sleep |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 398 | ldr r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 399 | orr r9, r8, #IDLE_EMIFS_REQUEST & 0xff |
| 400 | str r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 401 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 402 | @ Load base address of ARM_IDLECT1 and ARM_IDLECT2 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 403 | mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 |
| 404 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 |
| 405 | orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 |
| 406 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 407 | @ Turn off clock domains |
| 408 | @ Do not disable PERCK (0x04) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 409 | mov r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff |
| 410 | orr r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 411 | strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 412 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 413 | @ Request ARM idle |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 414 | mov r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff |
| 415 | orr r3, r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff00 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 416 | strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 417 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 418 | /* |
| 419 | * Let's wait for the next wake up event to wake us up. r0 can't be |
| 420 | * used here because r0 holds ARM_IDLECT1 |
| 421 | */ |
| 422 | mov r2, #0 |
| 423 | mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 424 | |
| 425 | @ Errata (HEL3SU467, section 1.4.4) specifies nop-instructions |
| 426 | @ according to this formula: |
| 427 | @ 2 + (4*DPLL_MULT)/DPLL_DIV/ARMDIV |
| 428 | @ Max DPLL_MULT = 18 |
| 429 | @ DPLL_DIV = 1 |
| 430 | @ ARMDIV = 1 |
| 431 | @ => 74 nop-instructions |
| 432 | nop |
| 433 | nop |
| 434 | nop |
| 435 | nop |
| 436 | nop |
| 437 | nop |
| 438 | nop |
| 439 | nop |
| 440 | nop |
| 441 | nop @10 |
| 442 | nop |
| 443 | nop |
| 444 | nop |
| 445 | nop |
| 446 | nop |
| 447 | nop |
| 448 | nop |
| 449 | nop |
| 450 | nop |
| 451 | nop @20 |
| 452 | nop |
| 453 | nop |
| 454 | nop |
| 455 | nop |
| 456 | nop |
| 457 | nop |
| 458 | nop |
| 459 | nop |
| 460 | nop |
| 461 | nop @30 |
| 462 | nop |
| 463 | nop |
| 464 | nop |
| 465 | nop |
| 466 | nop |
| 467 | nop |
| 468 | nop |
| 469 | nop |
| 470 | nop |
| 471 | nop @40 |
| 472 | nop |
| 473 | nop |
| 474 | nop |
| 475 | nop |
| 476 | nop |
| 477 | nop |
| 478 | nop |
| 479 | nop |
| 480 | nop |
| 481 | nop @50 |
| 482 | nop |
| 483 | nop |
| 484 | nop |
| 485 | nop |
| 486 | nop |
| 487 | nop |
| 488 | nop |
| 489 | nop |
| 490 | nop |
| 491 | nop @60 |
| 492 | nop |
| 493 | nop |
| 494 | nop |
| 495 | nop |
| 496 | nop |
| 497 | nop |
| 498 | nop |
| 499 | nop |
| 500 | nop |
| 501 | nop @70 |
| 502 | nop |
| 503 | nop |
| 504 | nop |
| 505 | nop @74 |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 506 | /* |
| 507 | * omap1610_cpu_suspend()'s resume point. |
| 508 | * |
| 509 | * It will just start executing here, so we'll restore stuff from the |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 510 | * stack. |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 511 | */ |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 512 | @ Restore the ARM_IDLECT1 and ARM_IDLECT2. |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 513 | strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] |
| 514 | strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] |
| 515 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 516 | @ Restore EMIFF controls |
| 517 | str r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] |
| 518 | str r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] |
| 519 | |
Tony Lindgren | 670c104 | 2006-04-02 17:46:25 +0100 | [diff] [blame] | 520 | @ Restore regs and return |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 521 | ldmfd sp!, {r0 - r12, pc} |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 522 | |
| 523 | ENTRY(omap1610_cpu_suspend_sz) |
| 524 | .word . - omap1610_cpu_suspend |
| 525 | #endif /* CONFIG_ARCH_OMAP16XX */ |