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/*
* SOC/PCB Temperature driver for Nintendo Switch's TI TMP451
*
* Copyright (c) 2018-2020 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include <soc/hw_init.h>
#include <soc/i2c.h>
#include <soc/t210.h>
#include <thermal/tmp451.h>
u16 tmp451_get_soc_temp(bool intenger)
{
u8 val;
u16 temp = 0;
val = i2c_recv_byte(I2C_1, TMP451_I2C_ADDR, TMP451_SOC_TEMP_REG);
if (intenger)
return val;
temp = val << 8;
val = i2c_recv_byte(I2C_1, TMP451_I2C_ADDR, TMP451_SOC_TMP_DEC_REG);
temp |= ((val >> 4) * 625) / 100;
return temp;
}
u16 tmp451_get_pcb_temp(bool intenger)
{
u8 val;
u16 temp = 0;
val = i2c_recv_byte(I2C_1, TMP451_I2C_ADDR, TMP451_PCB_TEMP_REG);
if (intenger)
return val;
temp = val << 8;
val = i2c_recv_byte(I2C_1, TMP451_I2C_ADDR, TMP451_PCB_TMP_DEC_REG);
temp |= ((val >> 4) * 625) / 100;
return temp;
}
void tmp451_init()
{
// Disable ALARM and Range to 0 - 127 oC.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_CONFIG_REG, 0x80);
// Set remote sensor offsets based on SoC.
if (hw_get_chip_id() == GP_HIDREV_MAJOR_T210)
{
// Set offset to 0 oC for Erista.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_SOC_TMP_OFH_REG, 0);
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_SOC_TMP_OFL_REG, 0);
}
else
{
// Set offset to -12.5 oC for Mariko.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_SOC_TMP_OFH_REG, 0xF3); // - 13 oC.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_SOC_TMP_OFL_REG, 0x80); // + 0.5 oC.
}
// Set conversion rate to 32/s and make a read to update the reg.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_CNV_RATE_REG, 9);
tmp451_get_soc_temp(false);
// Set rate to every 4 seconds.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_CNV_RATE_REG, 2);
}
void tmp451_end()
{
// Place into shutdown mode to conserve power.
i2c_send_byte(I2C_1, TMP451_I2C_ADDR, TMP451_CONFIG_REG, 0xC0);
}
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