[thirdparty/u-boot.git] / drivers / power / twl6030.c

/*
 * (C) Copyright 2010
 * Texas Instruments, <www.ti.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#include <config.h>
#ifdef CONFIG_TWL6030_POWER

#include <twl6030.h>

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,
				  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 int twl6030_gpadc_sw2_trigger(void)
{
	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, 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;

	/* 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, 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, VUSB_CFG_STATE, 0x21);

	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, MISC2, data);
}
#endif
Commit	Line	Data
516799f6 SS	1	/*
	2	* (C) Copyright 2010
	3	* Texas Instruments, <www.ti.com>
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
516799f6 SS	6	*/
	7	#include <config.h>
	8	#ifdef CONFIG_TWL6030_POWER
	9
	10	#include <twl6030.h>
	11
3e664f6d B	12	static int twl6030_gpadc_read_channel(u8 channel_no)
	13	{
	14	u8 lsb = 0;
	15	u8 msb = 0;
	16	int ret = 0;
	17
345ef204 NM	18	ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
345ef204 NM	19	GPCH0_LSB + channel_no * 2, &lsb);
3e664f6d B	20	if (ret)
	21	return ret;
	22
345ef204 NM	23	ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
345ef204 NM	24	GPCH0_MSB + channel_no * 2, &msb);
3e664f6d B	25	if (ret)
	26	return ret;
	27
	28	return (msb << 8) \| lsb;
	29	}
	30
	31	static int twl6030_gpadc_sw2_trigger(void)
	32	{
	33	u8 val;
	34	int ret = 0;
	35
345ef204	36	ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, CTRL_P2, CTRL_P2_SP2);
3e664f6d B	37	if (ret)
	38	return ret;
	39
	40	/* Waiting until the SW1 conversion ends*/
	41	val = CTRL_P2_BUSY;
	42
	43	while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
345ef204	44	ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, CTRL_P2, &val);
3e664f6d B	45	if (ret)
	46	return ret;
	47	udelay(1000);
	48	}
	49
	50	return 0;
	51	}
	52
	53	void twl6030_stop_usb_charging(void)
	54	{
345ef204	55	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
3e664f6d B	56
	57	return;
	58	}
	59
516799f6 SS	60	void twl6030_start_usb_charging(void)
516799f6 SS	61	{
345ef204 NM	62	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
	63	CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
	64	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
	65	CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
	66	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
	67	CONTROLLER_INT_MASK, MBAT_TEMP);
	68	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
	69	CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
	70	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
	71	CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
	72	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
	73	CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
	74	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
516799f6	75	/* Enable USB charging */
345ef204 NM	76	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
345ef204 NM	77	CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
516799f6 SS	78	return;
	79	}
	80
3e664f6d B	81	int twl6030_get_battery_current(void)
	82	{
	83	int battery_current = 0;
	84	u8 msb = 0;
	85	u8 lsb = 0;
	86
345ef204 NM	87	twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
345ef204 NM	88	twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
3e664f6d B	89	battery_current = ((msb << 8) \| lsb);
	90
	91	/* convert 10 bit signed number to 16 bit signed number */
	92	if (battery_current >= 0x2000)
	93	battery_current = (battery_current - 0x4000);
	94
	95	battery_current = battery_current * 3000 / 4096;
	96	printf("Battery Current: %d mA\n", battery_current);
	97
	98	return battery_current;
	99	}
	100
	101	int twl6030_get_battery_voltage(void)
	102	{
	103	int battery_volt = 0;
	104	int ret = 0;
	105
	106	/* Start GPADC SW conversion */
	107	ret = twl6030_gpadc_sw2_trigger();
	108	if (ret) {
	109	printf("Failed to convert battery voltage\n");
	110	return ret;
	111	}
	112
	113	/* measure Vbat voltage */
	114	battery_volt = twl6030_gpadc_read_channel(7);
	115	if (battery_volt < 0) {
	116	printf("Failed to read battery voltage\n");
	117	return ret;
	118	}
	119	battery_volt = (battery_volt * 25 * 1000) >> (10 + 2);
	120	printf("Battery Voltage: %d mV\n", battery_volt);
	121
	122	return battery_volt;
	123	}
	124
516799f6 SS	125	void twl6030_init_battery_charging(void)
516799f6 SS	126	{
3e664f6d B	127	u8 stat1 = 0;
	128	int battery_volt = 0;
	129	int ret = 0;
	130
	131	/* Enable VBAT measurement */
345ef204	132	twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
3e664f6d B	133
3e664f6d B	134	/* Enable GPADC module */
345ef204	135	ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS \| GPADCS);
3e664f6d B	136	if (ret) {
	137	printf("Failed to enable GPADC\n");
	138	return;
	139	}
	140
	141	battery_volt = twl6030_get_battery_voltage();
	142	if (battery_volt < 0)
	143	return;
	144
	145	if (battery_volt < 3000)
	146	printf("Main battery voltage too low!\n");
	147
	148	/* Check for the presence of USB charger */
345ef204	149	twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &stat1);
3e664f6d B	150
	151	/* check for battery presence indirectly via Fuel gauge */
	152	if ((stat1 & VBUS_DET) && (battery_volt < 3300))
	153	twl6030_start_usb_charging();
	154
516799f6 SS	155	return;
	156	}
	157
14fa2dd0 B	158	void twl6030_power_mmc_init()
	159	{
	160	/* set voltage to 3.0 and turnon for APP */
345ef204 NM	161	twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_VOLTATE, 0x15);
345ef204 NM	162	twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_STATE, 0x21);
14fa2dd0 B	163	}
14fa2dd0 B	164
516799f6 SS	165	void twl6030_usb_device_settings()
	166	{
	167	u8 data = 0;
	168
	169	/* Select APP Group and set state to ON */
345ef204	170	twl6030_i2c_write_u8(TWL6030_CHIP_PM, VUSB_CFG_STATE, 0x21);
516799f6	171
345ef204	172	twl6030_i2c_read_u8(TWL6030_CHIP_PM, MISC2, &data);
516799f6 SS	173	data \|= 0x10;
	174
	175	/* Select the input supply for VBUS regulator */
345ef204	176	twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC2, data);
516799f6 SS	177	}
516799f6 SS	178	#endif