diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/mediatek/mt8183/auxadc.c | 37 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8183/include/soc/addressmap.h | 1 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8183/include/soc/efuse.h | 30 |
3 files changed, 67 insertions, 1 deletions
diff --git a/src/soc/mediatek/mt8183/auxadc.c b/src/soc/mediatek/mt8183/auxadc.c index a167d2b58e..5460486709 100644 --- a/src/soc/mediatek/mt8183/auxadc.c +++ b/src/soc/mediatek/mt8183/auxadc.c @@ -18,11 +18,37 @@ #include <delay.h> #include <soc/addressmap.h> #include <soc/auxadc.h> +#include <soc/efuse.h> #include <soc/infracfg.h> #include <timer.h> static struct mtk_auxadc_regs *const mtk_auxadc = (void *)AUXADC_BASE; +#define ADC_GE_A_SHIFT 10 +#define ADC_GE_A_MASK (0x3ff << ADC_GE_A_SHIFT) +#define ADC_OE_A_SHIFT 0 +#define ADC_OE_A_MASK (0x3ff << ADC_OE_A_SHIFT) +#define ADC_CALI_EN_A_SHIFT 20 +#define ADC_CALI_EN_A_MASK (0x1 << ADC_CALI_EN_A_SHIFT) + +static int cali_oe; +static int cali_ge; +static int calibrated = 0; +static void mt_auxadc_update_cali(void) +{ + uint32_t cali_reg; + int cali_ge_a; + int cali_oe_a; + + cali_reg = read32(&mtk_efuse->adc_cali_reg); + + if ((cali_reg & ADC_CALI_EN_A_MASK) != 0) { + cali_oe_a = (cali_reg & ADC_OE_A_MASK) >> ADC_OE_A_SHIFT; + cali_ge_a = (cali_reg & ADC_GE_A_MASK) >> ADC_GE_A_SHIFT; + cali_ge = cali_ge_a - 512; + cali_oe = cali_oe_a - 512; + } +} static uint32_t auxadc_get_rawdata(int channel) { setbits_le32(&mt8183_infracfg->module_sw_cg_1_clr, 1 << 10); @@ -44,8 +70,17 @@ static uint32_t auxadc_get_rawdata(int channel) int auxadc_get_voltage(unsigned int channel) { + uint32_t raw_value; assert(channel < 16); + if (!calibrated) { + mt_auxadc_update_cali(); + calibrated = 1; + } + /* 1.5V in 4096 steps */ - return (int)((int64_t)auxadc_get_rawdata(channel) * 1500000 / 4096); + raw_value = auxadc_get_rawdata(channel); + + raw_value = raw_value - cali_oe; + return (int)((int64_t)raw_value * 1500000 / (4096 + cali_ge)); } diff --git a/src/soc/mediatek/mt8183/include/soc/addressmap.h b/src/soc/mediatek/mt8183/include/soc/addressmap.h index d41b2b942e..e9f80d1607 100644 --- a/src/soc/mediatek/mt8183/include/soc/addressmap.h +++ b/src/soc/mediatek/mt8183/include/soc/addressmap.h @@ -50,6 +50,7 @@ enum { IOCFG_LB_BASE = IO_PHYS + 0x01E70000, IOCFG_LM_BASE = IO_PHYS + 0x01E80000, IOCFG_BL_BASE = IO_PHYS + 0x01E90000, + EFUSEC_BASE = IO_PHYS + 0x01F10000, IOCFG_LT_BASE = IO_PHYS + 0x01F20000, IOCFG_TL_BASE = IO_PHYS + 0x01F30000, SSUSB_SIF_BASE = IO_PHYS + 0x01F40300, diff --git a/src/soc/mediatek/mt8183/include/soc/efuse.h b/src/soc/mediatek/mt8183/include/soc/efuse.h new file mode 100644 index 0000000000..32126abc4e --- /dev/null +++ b/src/soc/mediatek/mt8183/include/soc/efuse.h @@ -0,0 +1,30 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 MediaTek Inc. + * + * 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; version 2 of the License. + * + * 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. + */ + +#ifndef _MTK_EFUSE_H +#define _MTK_EFUSE_H + +#include <soc/addressmap.h> +#include <types.h> + +struct efuse_regs { + uint32_t rserved[109]; + uint32_t adc_cali_reg; +}; + +check_member(efuse_regs, adc_cali_reg, 0x1b4); +static struct efuse_regs *const mtk_efuse = (void *)EFUSEC_BASE; + +#endif |