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drivers/power/twl6030.c
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d41ce506b Initial Release, ... |
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/* * (C) Copyright 2010 * Texas Instruments, <www.ti.com> * * SPDX-License-Identifier: GPL-2.0+ */ #include <config.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 ", 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 "); return ret; } /* measure Vbat voltage */ battery_volt = twl6030_gpadc_read_channel(vbatch); if (battery_volt < 0) { printf("Failed to read battery voltage "); return ret; } battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift; printf("Battery Voltage: %d mV ", 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! "); return; } if (val == 0x30) { twl = &twl6030_info; } else if (val == 0x32) { twl = &twl6032_info; } else { puts("twl6030_init_battery_charging(): unsupported chip type "); 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 "); return; } battery_volt = twl6030_get_battery_voltage(); if (battery_volt < 0) return; if (battery_volt < 3000) printf("Main battery voltage too low! "); /* 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); } |