108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/*
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* Copyright (c) 2007-2017 Allwinnertech Co., Ltd.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/*
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*********************************************************************************************************
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* LINUX-KERNEL
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* AllWinner Linux Platform Develop Kits
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* Kernel Module
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*
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* (c) Copyright 2006-2011, kevin.z China
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* All Rights Reserved
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*
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* File : mem_key.c
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* By : kevin.z
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* Version : v1.0
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* Date : 2011-5-31 15:16
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* Descript:
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* Update : date auther ver notes
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*********************************************************************************************************
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*/
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#include "pm_i.h"
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static __mem_key_reg_t *KeyReg;
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static __u32 KeyCtrl, KeyIntc;
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/* static __u32 KeyInts, KeyData0, KeyData1; */
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/* ============================================================================== */
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/* QUERRY KEY FOR WAKE UP SYSTEM FROM MEM */
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/* ============================================================================== */
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/*
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*********************************************************************************************************
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* INIT KEY FOR MEM
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*
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* Description: init key for mem.
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*
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* Arguments : none
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*
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* Returns : EPDK_OK;
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*********************************************************************************************************
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*/
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__s32 mem_key_init(void)
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{
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/* set key register base */
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KeyReg = (__mem_key_reg_t *) (IO_ADDRESS(AW_LRADC01_BASE));
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/* backup LRADC registers */
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KeyCtrl = KeyReg->Lradc_Ctrl;
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KeyIntc = KeyReg->Lradc_Intc;
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KeyReg->Lradc_Ctrl = 0;
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/* note: mem_mdelay(10); */
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KeyReg->Lradc_Ctrl = (0x1 << 6) | (0x1 << 0);
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KeyReg->Lradc_Intc = (0x1 << 1);
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KeyReg->Lradc_Ints = (0x1 << 1);
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return 0;
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}
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/*
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*********************************************************************************************************
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* EXIT KEY FOR MEM
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*
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* Description: exit key for mem.
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*
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* Arguments : none
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*
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* Returns : EPDK_OK;
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*********************************************************************************************************
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*/
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__s32 mem_key_exit(void)
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{
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KeyReg->Lradc_Ctrl = KeyCtrl;
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KeyReg->Lradc_Intc = KeyIntc;
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return 0;
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}
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/*
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*********************************************************************************************************
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* QUERY KEY FOR WAKEUP MEM
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*
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* Description: query key for wakeup mem.
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*
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* Arguments : none
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*
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* Returns : result;
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* EPDK_TRUE, get a key;
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* EPDK_FALSE, no key;
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*********************************************************************************************************
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*/
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__s32 mem_query_key(void)
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{
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if (KeyReg->Lradc_Ints & 0x2) {
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KeyReg->Lradc_Ints = 0x2;
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return 0;
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}
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return -1;
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}
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