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u-boot/drivers/power/twl6030.c
Simon Glass 1e94b46f73 common: Drop linux/printk.h from common header 
This old patch was marked as deferred. Bring it back to life, to continue
towards the removal of common.h

Move this out of the common header and include it only where needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-09-24 09:54:57 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*/
#include <config.h>
#include <linux/delay.h>
#include <linux/printk.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
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