X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Fpower%2Ftwl6030.c;h=a1c6663a2e3f913f9245e8343321777c4ac62327;hb=8ea1fbf75c56cb9ac0e9d96173068703d4ee8fdd;hp=cf1da6b6a23d160349287661225d39e8b3222eb3;hpb=b77f380115028ef4b6cc59fc5ba332a6e31b4326;p=oweals%2Fu-boot.git diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c index cf1da6b6a2..a1c6663a2e 100644 --- a/drivers/power/twl6030.c +++ b/drivers/power/twl6030.c @@ -2,77 +2,234 @@ * (C) Copyright 2010 * Texas Instruments, * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include #ifdef CONFIG_TWL6030_POWER #include -/* Functions to read and write from TWL6030 */ -static inline int twl6030_i2c_write_u8(u8 chip_no, u8 val, u8 reg) +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) { - return i2c_write(chip_no, reg, 1, &val, 1); + 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; } -static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg) +void twl6030_stop_usb_charging(void) { - return i2c_read(chip_no, reg, 1, val, 1); + 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_1500, - CHARGERUSB_VICHRG); - twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CIN_LIMIT_NONE, - CHARGERUSB_CINLIMIT); - twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MBAT_TEMP, - CONTROLLER_INT_MASK); - twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MASK_MCHARGERUSB_THMREG, - CHARGERUSB_INT_MASK); - twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VOREG_4P0, - CHARGERUSB_VOREG); - twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL2_VITERM_100, - CHARGERUSB_CTRL2); + 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_EN_CHARGER, - CONTROLLER_CTRL1); + 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) { - twl6030_start_usb_charging(); + 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() +{ + /* set voltage to 3.0 and turnon for APP */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_VOLTATE, 0x15); + twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_STATE, 0x21); +} + void twl6030_usb_device_settings() { u8 data = 0; /* Select APP Group and set state to ON */ - twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x21, VUSB_CFG_STATE); + twl6030_i2c_write_u8(TWL6030_CHIP_PM, VUSB_CFG_STATE, 0x21); - twl6030_i2c_read_u8(TWL6030_CHIP_PM, &data, MISC2); + twl6030_i2c_read_u8(TWL6030_CHIP_PM, MISC2, &data); data |= 0x10; /* Select the input supply for VBUS regulator */ - twl6030_i2c_write_u8(TWL6030_CHIP_PM, data, MISC2); + twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC2, data); } #endif