* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
- * 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 <config.h>
#ifdef CONFIG_TWL6030_POWER
#include <twl6030.h>
-/* Functions to read and write from TWL6030 */
-static inline int twl6030_i2c_write_u8(u8 chip_no, u8 val, u8 reg)
+static int twl6030_gpadc_read_channel(u8 channel_no)
{
- return i2c_write(chip_no, reg, 1, &val, 1);
+ u8 lsb = 0;
+ u8 msb = 0;
+ int ret = 0;
+
+ ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
+ GPCH0_LSB + channel_no * 2, &lsb);
+ if (ret)
+ return ret;
+
+ ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
+ GPCH0_MSB + channel_no * 2, &msb);
+ if (ret)
+ return ret;
+
+ return (msb << 8) | lsb;
}
-static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
+static int twl6030_gpadc_sw2_trigger(void)
{
- return i2c_read(chip_no, reg, 1, val, 1);
+ u8 val;
+ int ret = 0;
+
+ ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, CTRL_P2, CTRL_P2_SP2);
+ 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, CTRL_P2, &val);
+ if (ret)
+ return ret;
+ udelay(1000);
+ }
+
+ return 0;
+}
+
+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_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;
+
+ /* 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(7);
+ if (battery_volt < 0) {
+ printf("Failed to read battery voltage\n");
+ return ret;
+ }
+ battery_volt = (battery_volt * 25 * 1000) >> (10 + 2);
+ printf("Battery Voltage: %d mV\n", battery_volt);
+
+ return battery_volt;
+}
+
void twl6030_init_battery_charging(void)
{
- twl6030_start_usb_charging();
+ u8 stat1 = 0;
+ int battery_volt = 0;
+ int ret = 0;
+
+ /* Enable VBAT measurement */
+ twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
+
+ /* 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, &stat1);
+
+ /* check for battery presence indirectly via Fuel gauge */
+ if ((stat1 & 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
projects / platform / kernel / u-boot.git / blobdiff