2558bd99cb
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 <rongjun.ying@csr.com> Signed-off-by: Barry Song <baohua.song@csr.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
65 lines
1.2 KiB
ArmAsm
65 lines
1.2 KiB
ArmAsm
/*
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* sleep mode for CSR SiRFprimaII
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*
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* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
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*
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* Licensed under GPLv2 or later.
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*/
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#include <linux/linkage.h>
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#include <asm/ptrace.h>
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#include <asm/assembler.h>
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#include "pm.h"
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#define DENALI_CTL_22_OFF 0x58
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#define DENALI_CTL_112_OFF 0x1c0
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.text
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ENTRY(sirfsoc_finish_suspend)
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@ r5: mem controller
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ldr r0, =sirfsoc_memc_base
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ldr r5, [r0]
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@ r6: pwrc base offset
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ldr r0, =sirfsoc_pwrc_base
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ldr r6, [r0]
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@ r7: rtc iobrg controller
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ldr r0, =sirfsoc_rtciobrg_base
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ldr r7, [r0]
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@ Read the power control register and set the
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@ sleep force bit.
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add r0, r6, #SIRFSOC_PWRC_PDN_CTRL
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bl __sirfsoc_rtc_iobrg_readl
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orr r0,r0,#SIRFSOC_PWR_SLEEPFORCE
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add r1, r6, #SIRFSOC_PWRC_PDN_CTRL
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bl sirfsoc_rtc_iobrg_pre_writel
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mov r1, #0x1
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@ read the MEM ctl register and set the self
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@ refresh bit
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ldr r2, [r5, #DENALI_CTL_22_OFF]
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orr r2, r2, #0x1
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@ Following code has to run from cache since
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@ the RAM is going to self refresh mode
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.align 5
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str r2, [r5, #DENALI_CTL_22_OFF]
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1:
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ldr r4, [r5, #DENALI_CTL_112_OFF]
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tst r4, #0x1
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bne 1b
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@ write SLEEPFORCE through rtc iobridge
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str r1, [r7]
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@ wait rtc io bridge sync
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1:
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ldr r3, [r7]
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tst r3, #0x01
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bne 1b
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b .
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