Add battery charging support twl6030 driver.
Add support for battery voltage and current measurements.
Add command to get battery status and start/stop battery charging from USB.
Signed-off-by: Balaji T K <balajitk@ti.com>
Tested-by: Steve Sakoman <steve.sakoman@linaro.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
LIB = $(obj)lib$(BOARD).o
-COBJS := sdp.o
+COBJS := sdp.o cmd_bat.o
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
--- /dev/null
+/*
+ * Copyright (C) 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
+ */
+
+#include <common.h>
+#include <command.h>
+
+#ifdef CONFIG_CMD_BAT
+#include <twl6030.h>
+
+int do_vbat(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ if (argc == 2) {
+ if (strncmp(argv[1], "startcharge", 12) == 0)
+ twl6030_start_usb_charging();
+ else if (strncmp(argv[1], "stopcharge", 11) == 0)
+ twl6030_stop_usb_charging();
+ else if (strncmp(argv[1], "status", 7) == 0) {
+ twl6030_get_battery_voltage();
+ twl6030_get_battery_current();
+ } else {
+ goto bat_cmd_usage;
+ }
+ } else {
+ goto bat_cmd_usage;
+ }
+ return 0;
+
+bat_cmd_usage:
+ return cmd_usage(cmdtp);
+}
+
+U_BOOT_CMD(
+ bat, 2, 1, do_vbat,
+ "battery charging, voltage/current measurements",
+ "status - display battery voltage and current\n"
+ "bat startcharge - start charging via USB\n"
+ "bat stopcharge - stop charging\n"
+);
+#endif /* CONFIG_BAT_CMD */
* MA 02111-1307 USA
*/
#include <common.h>
+#include <twl6030.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mmc_host_def.h>
*/
int misc_init_r(void)
{
+#ifdef CONFIG_TWL6030_POWER
+ twl6030_init_battery_charging();
+#endif
return 0;
}
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_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,
+ 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)
{
- twl6030_start_usb_charging();
+ 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;
}
/* TWL6030 */
#define CONFIG_TWL6030_POWER 1
+#define CONFIG_CMD_BAT 1
/* MMC */
#define CONFIG_GENERIC_MMC 1
#define TWL6030_CHIP_CHARGER 0x49
#define TWL6030_CHIP_PWM 0x49
+/* Slave Address 0x48 */
+#define VUSB_CFG_STATE 0xA2
+
+#define MISC1 0xE4
+#define VAC_MEAS (1 << 2)
+#define VBAT_MEAS (1 << 1)
+#define BB_MEAS (1 << 0)
+
+#define MISC2 0xE5
+
+/* Slave Address 0x49 */
+
/* Battery CHARGER REGISTERS */
#define CONTROLLER_INT_MASK 0xE0
#define CONTROLLER_CTRL1 0xE1
#define CHARGERUSB_VOREG_4P0 0x19
#define CHARGERUSB_VOREG_4P2 0x23
#define CHARGERUSB_VOREG_4P76 0x3F
+/* CHARGERUSB_CTRL1 */
+#define SUSPEND_BOOT (1 << 7)
+#define OPA_MODE (1 << 6)
+#define HZ_MODE (1 << 5)
+#define TERM (1 << 4)
/* CHARGERUSB_CTRL2 */
#define CHARGERUSB_CTRL2_VITERM_50 (0 << 5)
#define CHARGERUSB_CTRL2_VITERM_100 (1 << 5)
#define CHARGERUSB_CTRL2_VITERM_150 (2 << 5)
+#define CHARGERUSB_CTRL2_VITERM_400 (7 << 5)
/* CONTROLLER_CTRL1 */
#define CONTROLLER_CTRL1_EN_CHARGER (1 << 4)
#define CONTROLLER_CTRL1_SEL_CHARGER (1 << 3)
+/* CONTROLLER_STAT1 */
+#define CHRG_EXTCHRG_STATZ (1 << 7)
+#define CHRG_DET_N (1 << 5)
+#define VAC_DET (1 << 3)
+#define VBUS_DET (1 << 2)
-#define VUSB_CFG_STATE 0xA2
-#define MISC2 0xE5
+#define FG_REG_10 0xCA
+#define FG_REG_11 0xCB
+
+#define TOGGLE1 0x90
+#define FGS (1 << 5)
+#define FGR (1 << 4)
+#define GPADCS (1 << 1)
+#define GPADCR (1 << 0)
+
+#define CTRL_P2 0x34
+#define CTRL_P2_SP2 (1 << 2)
+#define CTRL_P2_EOCP2 (1 << 1)
+#define CTRL_P2_BUSY (1 << 0)
+
+#define GPCH0_LSB 0x57
+#define GPCH0_MSB 0x58
void twl6030_init_battery_charging(void);
void twl6030_usb_device_settings(void);
+void twl6030_start_usb_charging(void);
+void twl6030_stop_usb_charging(void);
+int twl6030_get_battery_voltage(void);
+int twl6030_get_battery_current(void);
projects / u-boot.git / commitdiff