132 lines
3.0 KiB
C
132 lines
3.0 KiB
C
/*
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* (C) Copyright 2007-2013
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Jerry Wang <wangflord@allwinnertech.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/arch/intc.h>
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#include <power/sunxi/pmu.h>
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#include "power_probe.h"
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#include <asm/arch/usb.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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************************************************************************************************************
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*
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* function
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*
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* 函数名称：
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*
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* 参数列表：
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*
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* 返回值 ：
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*
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* 说明 ：
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*
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*
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************************************************************************************************************
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*/
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int __usb_probe_vbus_type(void) //如果没有声明，默认为pc类型电源
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{
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return 0;
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}
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int usb_probe_vbus_type(void)
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__attribute__((weak, alias("__usb_probe_vbus_type")));
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void power_limit_init(void)
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{
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int battery_exist = 0;
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int dcin_exist = 0;
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int vbus_type = 0;
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int i = 0;
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do
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{
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#ifdef CONFIG_ARCH_HOMELET
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break;
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#endif
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axp_power_get_dcin_battery_exist(&dcin_exist, &battery_exist);//判断电池是否存在
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if(battery_exist >= 0)
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{
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break;
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}
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i ++;
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__msdelay(500);
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}
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while(i < 4);
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vbus_type = usb_probe_vbus_type();
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if(vbus_type == 1) //属于dc类型电源
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{
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printf("vbus not exist\n");
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gd->vbus_status = SUNXI_VBUS_NOT_EXIST;
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}
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else
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{
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printf("vbus exist\n");
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gd->vbus_status = SUNXI_VBUS_EXIST; //属于vbus类型
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}
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if(battery_exist != BATTERY_EXIST) //电池不存在，则直接限流到DC模式
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{
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axp_set_vbus_limit_dc();
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puts("no battery, limit to dc\n");
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return ;
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}
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if(dcin_exist == AXP_DCIN_EXIST) //如果普通外部电源存在，不是VBUS类型
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{
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axp_set_vbus_limit_dc();
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puts("normal dc exist, limit to dc\n");
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return ;
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}
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if(dcin_exist == AXP_VBUS_EXIST) //如果VBUS电源存在
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{
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vbus_type = usb_probe_vbus_type();
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if(vbus_type == 1) //属于dc类型电源
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{
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axp_set_vbus_limit_dc(); //dp_dm 拉高
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puts("vbus dc exist, limit to dc\n");
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}
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else
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{
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axp_set_vbus_limit_pc(); //dp_dm 拉低
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axp_set_charge_current(600);
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puts("vbus pc exist, limit to pc\n");
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}
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return ;
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}
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axp_set_vbus_limit_dc(); //只有电池存在
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puts("only battery exist, limit to dc\n");
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return ;
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}
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