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d6a2042dbc
This adds support for powering off (the omap SoC) from the twl6030. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
272 lines
6.7 KiB
C
272 lines
6.7 KiB
C
/*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#include <twl6030.h>
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static struct twl6030_data *twl;
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static struct twl6030_data twl6030_info = {
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.chip_type = chip_TWL6030,
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.adc_rbase = GPCH0_LSB,
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.adc_ctrl = CTRL_P2,
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.adc_enable = CTRL_P2_SP2,
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.vbat_mult = TWL6030_VBAT_MULT,
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.vbat_shift = TWL6030_VBAT_SHIFT,
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};
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static struct twl6030_data twl6032_info = {
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.chip_type = chip_TWL6032,
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.adc_rbase = TWL6032_GPCH0_LSB,
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.adc_ctrl = TWL6032_CTRL_P1,
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.adc_enable = CTRL_P1_SP1,
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.vbat_mult = TWL6032_VBAT_MULT,
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.vbat_shift = TWL6032_VBAT_SHIFT,
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};
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static int twl6030_gpadc_read_channel(u8 channel_no)
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{
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u8 lsb = 0;
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u8 msb = 0;
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int ret = 0;
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ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
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twl->adc_rbase + channel_no * 2, &lsb);
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if (ret)
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return ret;
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ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
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twl->adc_rbase + 1 + channel_no * 2, &msb);
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if (ret)
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return ret;
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return (msb << 8) | lsb;
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}
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static int twl6030_gpadc_sw2_trigger(void)
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{
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u8 val;
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int ret = 0;
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ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
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twl->adc_ctrl, twl->adc_enable);
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if (ret)
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return ret;
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/* Waiting until the SW1 conversion ends*/
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val = CTRL_P2_BUSY;
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while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
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ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
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twl->adc_ctrl, &val);
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if (ret)
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return ret;
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udelay(1000);
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}
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return 0;
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}
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void twl6030_power_off(void)
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{
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON,
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TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF |
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TWL6030_PHOENIX_MOD_DEVOFF);
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}
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void twl6030_stop_usb_charging(void)
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{
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
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return;
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}
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void twl6030_start_usb_charging(void)
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{
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CONTROLLER_INT_MASK, MBAT_TEMP);
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
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/* Enable USB charging */
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twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
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CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
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return;
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}
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int twl6030_get_battery_current(void)
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{
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int battery_current = 0;
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u8 msb = 0;
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u8 lsb = 0;
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twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
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twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
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battery_current = ((msb << 8) | lsb);
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/* convert 10 bit signed number to 16 bit signed number */
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if (battery_current >= 0x2000)
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battery_current = (battery_current - 0x4000);
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battery_current = battery_current * 3000 / 4096;
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printf("Battery Current: %d mA\n", battery_current);
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return battery_current;
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}
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int twl6030_get_battery_voltage(void)
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{
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int battery_volt = 0;
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int ret = 0;
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u8 vbatch;
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if (twl->chip_type == chip_TWL6030) {
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vbatch = TWL6030_GPADC_VBAT_CHNL;
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} else {
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ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
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TWL6032_GPSELECT_ISB,
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TWL6032_GPADC_VBAT_CHNL);
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if (ret)
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return ret;
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vbatch = 0;
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}
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/* Start GPADC SW conversion */
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ret = twl6030_gpadc_sw2_trigger();
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if (ret) {
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printf("Failed to convert battery voltage\n");
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return ret;
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}
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/* measure Vbat voltage */
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battery_volt = twl6030_gpadc_read_channel(vbatch);
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if (battery_volt < 0) {
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printf("Failed to read battery voltage\n");
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return ret;
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}
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battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
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printf("Battery Voltage: %d mV\n", battery_volt);
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return battery_volt;
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}
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void twl6030_init_battery_charging(void)
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{
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u8 val = 0;
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int battery_volt = 0;
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int ret = 0;
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ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val);
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if (ret) {
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puts("twl6030_init_battery_charging(): could not determine chip!\n");
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return;
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}
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if (val == 0x30) {
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twl = &twl6030_info;
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} else if (val == 0x32) {
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twl = &twl6032_info;
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} else {
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puts("twl6030_init_battery_charging(): unsupported chip type\n");
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return;
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}
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/* Enable VBAT measurement */
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if (twl->chip_type == chip_TWL6030) {
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
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twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
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TWL6030_GPADC_CTRL,
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GPADC_CTRL_SCALER_DIV4);
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} else {
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twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
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TWL6032_GPADC_CTRL2,
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GPADC_CTRL2_CH18_SCALER_EN);
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}
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/* Enable GPADC module */
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ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
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if (ret) {
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printf("Failed to enable GPADC\n");
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return;
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}
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battery_volt = twl6030_get_battery_voltage();
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if (battery_volt < 0)
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return;
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if (battery_volt < 3000)
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printf("Main battery voltage too low!\n");
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/* Check for the presence of USB charger */
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twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val);
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/* check for battery presence indirectly via Fuel gauge */
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if ((val & VBUS_DET) && (battery_volt < 3300))
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twl6030_start_usb_charging();
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return;
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}
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void twl6030_power_mmc_init(int dev_index)
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{
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u8 value = 0;
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if (dev_index == 0) {
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/* 3.0V voltage output for VMMC */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
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TWL6030_CFG_VOLTAGE_30);
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/* Enable P1 output for VMMC */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
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TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
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twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT, &value);
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} else if (dev_index == 1) {
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/* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */
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if (value & TWL6030_PH_STS_BOOT2) {
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/* 1.8V voltage output for VAUX1 */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
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TWL6030_CFG_VOLTAGE_18);
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} else {
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/* 2.8V voltage output for VAUX1 */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
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TWL6030_CFG_VOLTAGE_28);
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}
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/* Enable P1 output for VAUX */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE,
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TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
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}
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}
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void twl6030_usb_device_settings()
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{
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u8 value = 0;
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/* 3.3V voltage output for VUSB */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
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TWL6030_CFG_VOLTAGE_33);
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/* Enable P1 output for VUSB */
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
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TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
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/* Select the input supply for VUSB regulator */
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twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
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value |= TWL6030_MISC2_VUSB_IN_VSYS;
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value &= ~TWL6030_MISC2_VUSB_IN_PMID;
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twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
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}
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