From 2558bd99cb1426a05ac8f1c78dc9c75a83ceb4bb Mon Sep 17 00:00:00 2001 From: Rongjun Ying Date: Wed, 21 Sep 2011 21:46:20 +0800 Subject: ARM: CSR: PM: add sleep entry for SiRFprimaII This patch adds suspend-to-mem support for prima2. It will make prima2 enter DEEPSLEEP mode while accepting PM_SUSPEND_MEM command. Signed-off-by: Rongjun Ying Signed-off-by: Barry Song Acked-by: Arnd Bergmann --- arch/arm/mach-prima2/sleep.S | 64 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 arch/arm/mach-prima2/sleep.S (limited to 'arch/arm/mach-prima2/sleep.S') diff --git a/arch/arm/mach-prima2/sleep.S b/arch/arm/mach-prima2/sleep.S new file mode 100644 index 000000000000..0745abc365fc --- /dev/null +++ b/arch/arm/mach-prima2/sleep.S @@ -0,0 +1,64 @@ +/* + * sleep mode for CSR SiRFprimaII + * + * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include +#include +#include + +#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 . -- cgit v1.2.3-55-g7522