| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * sleep mode for CSR SiRFprimaII |
| * |
| * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/ptrace.h> |
| #include <asm/assembler.h> |
| |
| #include "pm.h" |
| |
| #define DENALI_CTL_22_OFF 0x58 |
| #define DENALI_CTL_112_OFF 0x1c0 |
| |
| .text |
| |
| ENTRY(sirfsoc_finish_suspend) |
| @ r5: mem controller |
| ldr r0, =sirfsoc_memc_base |
| ldr r5, [r0] |
| @ r6: pwrc base offset |
| ldr r0, =sirfsoc_pwrc_base |
| ldr r6, [r0] |
| @ r7: rtc iobrg controller |
| ldr r0, =sirfsoc_rtciobrg_base |
| ldr r7, [r0] |
| |
| @ Read the power control register and set the |
| @ sleep force bit. |
| add r0, r6, #SIRFSOC_PWRC_PDN_CTRL |
| bl __sirfsoc_rtc_iobrg_readl |
| orr r0,r0,#SIRFSOC_PWR_SLEEPFORCE |
| add r1, r6, #SIRFSOC_PWRC_PDN_CTRL |
| bl sirfsoc_rtc_iobrg_pre_writel |
| mov r1, #0x1 |
| |
| @ read the MEM ctl register and set the self |
| @ refresh bit |
| |
| ldr r2, [r5, #DENALI_CTL_22_OFF] |
| orr r2, r2, #0x1 |
| |
| @ Following code has to run from cache since |
| @ the RAM is going to self refresh mode |
| .align 5 |
| str r2, [r5, #DENALI_CTL_22_OFF] |
| |
| 1: |
| ldr r4, [r5, #DENALI_CTL_112_OFF] |
| tst r4, #0x1 |
| bne 1b |
| |
| @ write SLEEPFORCE through rtc iobridge |
| |
| str r1, [r7] |
| @ wait rtc io bridge sync |
| 1: |
| ldr r3, [r7] |
| tst r3, #0x01 |
| bne 1b |
| b . |
