mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![Balaji T K](/assets/img/avatar_default.png)
Config VMMC voltage to 3V for MMC/SD card slot and PBIAS settings needed for OMAP4 Fixes MMC/SD detection on boot from eMMC. Signed-off-by: Balaji T K <balajitk@ti.com> Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
206 lines
5.1 KiB
C
206 lines
5.1 KiB
C
/*
|
|
* (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
|
|
*/
|
|
#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)
|
|
{
|
|
return i2c_write(chip_no, reg, 1, &val, 1);
|
|
}
|
|
|
|
static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
|
|
{
|
|
return i2c_read(chip_no, reg, 1, val, 1);
|
|
}
|
|
|
|
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, &lsb,
|
|
GPCH0_LSB + channel_no * 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, &msb,
|
|
GPCH0_MSB + channel_no * 2);
|
|
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, CTRL_P2_SP2, CTRL_P2);
|
|
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, &val, CTRL_P2);
|
|
if (ret)
|
|
return ret;
|
|
udelay(1000);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void twl6030_stop_usb_charging(void)
|
|
{
|
|
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, 0, CONTROLLER_CTRL1);
|
|
|
|
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_400,
|
|
CHARGERUSB_CTRL2);
|
|
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TERM, CHARGERUSB_CTRL1);
|
|
/* Enable USB charging */
|
|
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1_EN_CHARGER,
|
|
CONTROLLER_CTRL1);
|
|
return;
|
|
}
|
|
|
|
int twl6030_get_battery_current(void)
|
|
{
|
|
int battery_current = 0;
|
|
u8 msb = 0;
|
|
u8 lsb = 0;
|
|
|
|
twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, &msb, FG_REG_11);
|
|
twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, &lsb, FG_REG_10);
|
|
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)
|
|
{
|
|
u8 stat1 = 0;
|
|
int battery_volt = 0;
|
|
int ret = 0;
|
|
|
|
/* Enable VBAT measurement */
|
|
twl6030_i2c_write_u8(TWL6030_CHIP_PM, VBAT_MEAS, MISC1);
|
|
|
|
/* Enable GPADC module */
|
|
ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, FGS | GPADCS, TOGGLE1);
|
|
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, &stat1, CONTROLLER_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, 0x15, VMMC_CFG_VOLTATE);
|
|
twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x21, VMMC_CFG_STATE);
|
|
}
|
|
|
|
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_read_u8(TWL6030_CHIP_PM, &data, MISC2);
|
|
data |= 0x10;
|
|
|
|
/* Select the input supply for VBUS regulator */
|
|
twl6030_i2c_write_u8(TWL6030_CHIP_PM, data, MISC2);
|
|
}
|
|
#endif
|