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/*
* arch/arm/cpu/armv8/common/firmware/plat/gxb/saradc.c
*
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <string.h>
#include <stdio.h>
#include <saradc.h>
#include <asm/arch/secure_apb.h>
#include <timer.h>
#define SAMP_COUNT 9
const unsigned int sam_val[SAMP_COUNT] = {0, 0x80, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400};
unsigned int saradc_ch1_get(void)
{
unsigned int val = 0;
unsigned int cnt=0;
unsigned int idx=0;
Wr(P_SAR_ADC_CHAN_LIST, 0x00000001); //
Wr(P_SAR_ADC_AVG_CNTL, 0x00003000);
Wr(P_SAR_ADC_REG3, 0xc3a8500a);
Wr(P_SAR_ADC_DELAY, 0x010a000a);
Wr(P_SAR_ADC_AUX_SW, 0x03eb1a0c);
Wr(P_SAR_ADC_CHAN_10_SW, 0x008c000c);
Wr(P_SAR_ADC_DETECT_IDLE_SW, 0x008e038c);
Wr(P_SAR_ADC_DELTA_11, 0x0c00c400);
Wr(P_SAR_ADC_CLOCK, 0x00000114);
Wr(P_SAR_ADC_TEMP_SES, 0x00002000);
Wr(P_SAR_SAR_ADC_REG0, 0x84064040);
_udelay(20);
Wr(P_SAR_SAR_ADC_REG0, 0x84064041);
_udelay(20);
Wr(P_SAR_SAR_ADC_REG0, 0x84064045);
_udelay(20);
while ( ( Rd(P_SAR_SAR_ADC_REG0)& 0x70000000) && (cnt++ <100)) ;
if (cnt >= 100) {
serial_puts(" Get saradc sample Error. Cnt_");
serial_put_dec(cnt);
serial_puts("\n");
}
val = Rd(P_SAR_FIFO_READ) & 0x3ff;
for (idx=0; idx<SAMP_COUNT; idx++)
{
if (val <= sam_val[idx]+0x3f)
break;
}
Wr(SEC_AO_SEC_GP_CFG0, ((Rd(SEC_AO_SEC_GP_CFG0) & 0xFFFF00ff) | (idx << 8)));
serial_puts("Board ID = ");
serial_put_dec(idx);
serial_puts("\n");
return idx;
}
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