diff options
Diffstat (limited to 'roms/u-boot/drivers/power/twl6030.c')
| -rw-r--r-- | roms/u-boot/drivers/power/twl6030.c | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/power/twl6030.c b/roms/u-boot/drivers/power/twl6030.c new file mode 100644 index 000000000..2b50a56fa --- /dev/null +++ b/roms/u-boot/drivers/power/twl6030.c @@ -0,0 +1,310 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + */ +#include <config.h> +#include <linux/delay.h> + +#include <twl6030.h> + +static struct twl6030_data *twl; + +static struct twl6030_data twl6030_info = { + .chip_type = chip_TWL6030, + .adc_rbase = GPCH0_LSB, + .adc_ctrl = CTRL_P2, + .adc_enable = CTRL_P2_SP2, + .vbat_mult = TWL6030_VBAT_MULT, + .vbat_shift = TWL6030_VBAT_SHIFT, +}; + +static struct twl6030_data twl6032_info = { + .chip_type = chip_TWL6032, + .adc_rbase = TWL6032_GPCH0_LSB, + .adc_ctrl = TWL6032_CTRL_P1, + .adc_enable = CTRL_P1_SP1, + .vbat_mult = TWL6032_VBAT_MULT, + .vbat_shift = TWL6032_VBAT_SHIFT, +}; + + +static int twl6030_gpadc_read_channel(u8 channel_no) +{ + u8 lsb = 0; + u8 msb = 0; + int ret = 0; + + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, + twl->adc_rbase + channel_no * 2, &lsb); + if (ret) + return ret; + + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, + twl->adc_rbase + 1 + channel_no * 2, &msb); + if (ret) + return ret; + + return (msb << 8) | lsb; +} + +static int twl6030_gpadc_sw2_trigger(void) +{ + u8 val; + int ret = 0; + + ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + twl->adc_ctrl, twl->adc_enable); + if (ret) + return ret; + + /* Waiting until the SW1 conversion ends*/ + val = CTRL_P2_BUSY; + + while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) { + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, + twl->adc_ctrl, &val); + if (ret) + return ret; + udelay(1000); + } + + return 0; +} + +void twl6030_power_off(void) +{ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON, + TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF | + TWL6030_PHOENIX_MOD_DEVOFF); +} + +void twl6030_stop_usb_charging(void) +{ + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0); + + return; +} + +void twl6030_start_usb_charging(void) +{ + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CONTROLLER_INT_MASK, MBAT_TEMP); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM); + /* Enable USB charging */ + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, + CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER); + return; +} + +int twl6030_get_battery_current(void) +{ + int battery_current = 0; + u8 msb = 0; + u8 lsb = 0; + + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb); + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb); + battery_current = ((msb << 8) | lsb); + + /* convert 10 bit signed number to 16 bit signed number */ + if (battery_current >= 0x2000) + battery_current = (battery_current - 0x4000); + + battery_current = battery_current * 3000 / 4096; + printf("Battery Current: %d mA\n", battery_current); + + return battery_current; +} + +int twl6030_get_battery_voltage(void) +{ + int battery_volt = 0; + int ret = 0; + u8 vbatch; + + if (twl->chip_type == chip_TWL6030) { + vbatch = TWL6030_GPADC_VBAT_CHNL; + } else { + ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + TWL6032_GPSELECT_ISB, + TWL6032_GPADC_VBAT_CHNL); + if (ret) + return ret; + vbatch = 0; + } + + /* Start GPADC SW conversion */ + ret = twl6030_gpadc_sw2_trigger(); + if (ret) { + printf("Failed to convert battery voltage\n"); + return ret; + } + + /* measure Vbat voltage */ + battery_volt = twl6030_gpadc_read_channel(vbatch); + if (battery_volt < 0) { + printf("Failed to read battery voltage\n"); + return ret; + } + battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift; + printf("Battery Voltage: %d mV\n", battery_volt); + + return battery_volt; +} + +void twl6030_init_battery_charging(void) +{ + u8 val = 0; + int battery_volt = 0; + int ret = 0; + + ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val); + if (ret) { + puts("twl6030_init_battery_charging(): could not determine chip!\n"); + return; + } + if (val == 0x30) { + twl = &twl6030_info; + } else if (val == 0x32) { + twl = &twl6032_info; + } else { + puts("twl6030_init_battery_charging(): unsupported chip type\n"); + return; + } + + /* Enable VBAT measurement */ + if (twl->chip_type == chip_TWL6030) { + twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS); + twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + TWL6030_GPADC_CTRL, + GPADC_CTRL_SCALER_DIV4); + } else { + twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + TWL6032_GPADC_CTRL2, + GPADC_CTRL2_CH18_SCALER_EN); + } + + /* Enable GPADC module */ + ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS); + if (ret) { + printf("Failed to enable GPADC\n"); + return; + } + + battery_volt = twl6030_get_battery_voltage(); + if (battery_volt < 0) + return; + + if (battery_volt < 3000) + printf("Main battery voltage too low!\n"); + + /* Check for the presence of USB charger */ + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val); + + /* check for battery presence indirectly via Fuel gauge */ + if ((val & VBUS_DET) && (battery_volt < 3300)) + twl6030_start_usb_charging(); + + return; +} + +void twl6030_power_mmc_init(int dev_index) +{ + u8 value = 0; + + if (dev_index == 0) { + /* 3.0V voltage output for VMMC */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE, + TWL6030_CFG_VOLTAGE_30); + + /* Enable P1 output for VMMC */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE, + TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON); + } else if (dev_index == 1) { + twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT, + &value); + /* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */ + if (value & TWL6030_PH_STS_BOOT2) { + /* 1.8V voltage output for VAUX1 */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE, + TWL6030_CFG_VOLTAGE_18); + } else { + /* 2.8V voltage output for VAUX1 */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE, + TWL6030_CFG_VOLTAGE_28); + } + + /* Enable P1 output for VAUX */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE, + TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON); + } +} + +void twl6030_usb_device_settings() +{ + u8 value = 0; + + /* 3.3V voltage output for VUSB */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE, + TWL6030_CFG_VOLTAGE_33); + + /* Enable P1 output for VUSB */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE, + TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON); + + /* Select the input supply for VUSB regulator */ + twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value); + value |= TWL6030_MISC2_VUSB_IN_VSYS; + value &= ~TWL6030_MISC2_VUSB_IN_PMID; + twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value); +} + +#if CONFIG_IS_ENABLED(DM_I2C) +int twl6030_i2c_write_u8(u8 chip_no, u8 reg, u8 val) +{ + struct udevice *dev; + int ret; + + ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev); + if (ret) { + pr_err("unable to get I2C bus. ret %d\n", ret); + return ret; + } + ret = dm_i2c_reg_write(dev, reg, val); + if (ret) { + pr_err("writing to twl6030 failed. ret %d\n", ret); + return ret; + } + return 0; +} + +int twl6030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp) +{ + struct udevice *dev; + int ret; + + ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev); + if (ret) { + pr_err("unable to get I2C bus. ret %d\n", ret); + return ret; + } + ret = dm_i2c_reg_read(dev, reg); + if (ret < 0) { + pr_err("reading from twl6030 failed. ret %d\n", ret); + return ret; + } + *valp = (u8)ret; + return 0; +} +#endif |