diff options
Diffstat (limited to 'driver/charger/isl923x.c')
| -rw-r--r-- | driver/charger/isl923x.c | 741 |
1 files changed, 0 insertions, 741 deletions
diff --git a/driver/charger/isl923x.c b/driver/charger/isl923x.c deleted file mode 100644 index 7a02f62ca0..0000000000 --- a/driver/charger/isl923x.c +++ /dev/null @@ -1,741 +0,0 @@ -/* Copyright 2015 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * Intersil ISL-9237/8 battery charger driver. - */ - -#include "adc.h" -#include "battery.h" -#include "battery_smart.h" -#include "charger.h" -#include "console.h" -#include "common.h" -#include "hooks.h" -#include "i2c.h" -#include "isl923x.h" -#include "system.h" -#include "task.h" -#include "timer.h" -#include "util.h" - -#ifndef CONFIG_CHARGER_NARROW_VDC -#error "ISL9237/8 is a NVDC charger, please enable CONFIG_CHARGER_NARROW_VDC." -#endif - -#define DEFAULT_R_AC 20 -#define DEFAULT_R_SNS 10 -#define R_AC CONFIG_CHARGER_SENSE_RESISTOR_AC -#define R_SNS CONFIG_CHARGER_SENSE_RESISTOR -#define REG_TO_CURRENT(REG) ((REG) * DEFAULT_R_SNS / R_SNS) -#define CURRENT_TO_REG(CUR) ((CUR) * R_SNS / DEFAULT_R_SNS) -#define AC_REG_TO_CURRENT(REG) ((REG) * DEFAULT_R_AC / R_AC) -#define AC_CURRENT_TO_REG(CUR) ((CUR) * R_AC / DEFAULT_R_AC) - -/* Console output macros */ -#define CPRINTF(format, args...) cprintf(CC_CHARGER, format, ## args) -#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args) - -static int learn_mode; - -/* Mutex for CONTROL1 register, that can be updated from multiple tasks. */ -static struct mutex control1_mutex; - -/* Charger parameters */ -static const struct charger_info isl9237_charger_info = { - .name = CHARGER_NAME, - .voltage_max = CHARGE_V_MAX, - .voltage_min = CHARGE_V_MIN, - .voltage_step = CHARGE_V_STEP, - .current_max = REG_TO_CURRENT(CHARGE_I_MAX), - .current_min = REG_TO_CURRENT(CHARGE_I_MIN), - .current_step = REG_TO_CURRENT(CHARGE_I_STEP), - .input_current_max = AC_REG_TO_CURRENT(INPUT_I_MAX), - .input_current_min = AC_REG_TO_CURRENT(INPUT_I_MIN), - .input_current_step = AC_REG_TO_CURRENT(INPUT_I_STEP), -}; - -static inline int raw_read8(int offset, int *value) -{ - return i2c_read8(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - offset, value); -} - -static inline int raw_read16(int offset, int *value) -{ - return i2c_read16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - offset, value); -} - -static inline int raw_write16(int offset, int value) -{ - return i2c_write16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - offset, value); -} - -static int isl9237_set_current(uint16_t current) -{ - return raw_write16(ISL923X_REG_CHG_CURRENT, CURRENT_TO_REG(current)); -} - -static int isl9237_set_voltage(uint16_t voltage) -{ - return raw_write16(ISL923X_REG_SYS_VOLTAGE_MAX, voltage); -} - -/* chip specific interfaces */ - -int charger_set_input_current(int input_current) -{ - int rv; - uint16_t reg = AC_CURRENT_TO_REG(input_current); - - rv = raw_write16(ISL923X_REG_ADAPTER_CURRENT1, reg); - if (rv) - return rv; - - return raw_write16(ISL923X_REG_ADAPTER_CURRENT2, reg); -} - -int charger_get_input_current(int *input_current) -{ - int rv; - int reg; - - rv = raw_read16(ISL923X_REG_ADAPTER_CURRENT1, ®); - if (rv) - return rv; - - *input_current = AC_REG_TO_CURRENT(reg); - return EC_SUCCESS; -} - -#if defined(CONFIG_CHARGER_OTG) && defined(CONFIG_CHARGER_ISL9238) -int charger_enable_otg_power(int enabled) -{ - int rv, control1; - - mutex_lock(&control1_mutex); - - rv = raw_read16(ISL923X_REG_CONTROL1, &control1); - if (rv) - goto out; - - if (enabled) - control1 |= ISL923X_C1_OTG; - else - control1 &= ~ISL923X_C1_OTG; - - rv = raw_write16(ISL923X_REG_CONTROL1, control1); - -out: - mutex_unlock(&control1_mutex); - - return rv; -} - -/* - * TODO(b:67920792): OTG is not implemented for ISL9237 that has different - * register scale and range. - */ -int charger_set_otg_current_voltage(int output_current, int output_voltage) -{ - int rv; - uint16_t volt_reg = (output_voltage / ISL9238_OTG_VOLTAGE_STEP) - << ISL9238_OTG_VOLTAGE_SHIFT; - uint16_t current_reg = - DIV_ROUND_UP(output_current, ISL923X_OTG_CURRENT_STEP) - << ISL923X_OTG_CURRENT_SHIFT; - - if (output_current < 0 || output_current > ISL923X_OTG_CURRENT_MAX || - output_voltage > ISL9238_OTG_VOLTAGE_MAX) - return EC_ERROR_INVAL; - - /* Set voltage. */ - rv = raw_write16(ISL923X_REG_OTG_VOLTAGE, volt_reg); - if (rv) - return rv; - - /* Set current. */ - return raw_write16(ISL923X_REG_OTG_CURRENT, current_reg); -} -#endif /* CONFIG_CHARGER_OTG && CONFIG_CHARGER_ISL9238 */ - -int charger_manufacturer_id(int *id) -{ - int rv; - int reg; - - rv = raw_read16(ISL923X_REG_MANUFACTURER_ID, ®); - if (rv) - return rv; - - *id = reg; - return EC_SUCCESS; -} - -int charger_device_id(int *id) -{ - int rv; - int reg; - - rv = raw_read16(ISL923X_REG_DEVICE_ID, ®); - if (rv) - return rv; - - *id = reg; - return EC_SUCCESS; -} - -int charger_get_option(int *option) -{ - int rv; - uint32_t controls; - int reg; - - rv = raw_read16(ISL923X_REG_CONTROL0, ®); - if (rv) - return rv; - - controls = reg; - rv = raw_read16(ISL923X_REG_CONTROL1, ®); - if (rv) - return rv; - - controls |= reg << 16; - *option = controls; - return EC_SUCCESS; -} - -int charger_set_option(int option) -{ - int rv; - uint16_t reg; - - reg = option & 0xffff; - rv = raw_write16(ISL923X_REG_CONTROL0, reg); - - if (rv) - return rv; - - reg = (option >> 16) & 0xffff; - return raw_write16(ISL923X_REG_CONTROL1, reg); -} - -/* Charger interfaces */ - -const struct charger_info *charger_get_info(void) -{ - return &isl9237_charger_info; -} - -int charger_get_status(int *status) -{ - *status = CHARGER_LEVEL_2; - - return EC_SUCCESS; -} - -int charger_set_mode(int mode) -{ - int rv = EC_SUCCESS; - - /* - * See crosbug.com/p/51196. Always disable learn mode unless it was set - * explicitly. - */ - if (!learn_mode) - rv = charger_discharge_on_ac(0); - - /* ISL923X does not support inhibit mode setting. */ - return rv; -} - -int charger_get_current(int *current) -{ - int rv; - int reg; - - rv = raw_read16(ISL923X_REG_CHG_CURRENT, ®); - if (rv) - return rv; - - *current = REG_TO_CURRENT(reg); - return EC_SUCCESS; -} - -int charger_set_current(int current) -{ - return isl9237_set_current(current); -} - -int charger_get_voltage(int *voltage) -{ - return raw_read16(ISL923X_REG_SYS_VOLTAGE_MAX, voltage); -} - -int charger_set_voltage(int voltage) -{ - /* The ISL923X will drop voltage to as low as requested. As the - * charger state machine will pass in 0 voltage, protect the system - * voltage by capping to the minimum. The reason is that the ISL923X - * only can regulate the system voltage which will kill the board's - * power if below 0. */ - if (voltage == 0) { - const struct battery_info *bi = battery_get_info(); - voltage = bi->voltage_min; - } - - return isl9237_set_voltage(voltage); -} - -int charger_post_init(void) -{ - /* - * charger_post_init() is called every time AC becomes present in the - * system. It's called this frequently because there are some charger - * ICs which become unpowered when AC is not present. Therefore, upon - * AC becoming present again, the chargers need to be reinitialized. - * The ISL9237/8 can be powered from VSYS and therefore do not need to - * be reinitialized everytime. This is why isl923x_init() is called - * once at HOOK_INIT time. - */ - return EC_SUCCESS; -} - -int isl923x_set_ac_prochot(uint16_t ma) -{ - int rv; - - if (ma > ISL923X_AC_PROCHOT_CURRENT_MAX) { - CPRINTS("%s: invalid current (%d mA)\n", __func__, ma); - return EC_ERROR_INVAL; - } - - rv = raw_write16(ISL923X_REG_PROCHOT_AC, ma); - if (rv) - CPRINTS("%s failed (%d)", __func__, rv); - return rv; -} - -int isl923x_set_dc_prochot(uint16_t ma) -{ - int rv; - - if (ma > ISL923X_DC_PROCHOT_CURRENT_MAX) { - CPRINTS("%s: invalid current (%d mA)\n", __func__, ma); - return EC_ERROR_INVAL; - } - - rv = raw_write16(ISL923X_REG_PROCHOT_DC, ma); - if (rv) - CPRINTS("%s failed (%d)", __func__, rv); - return rv; -} - -static void isl923x_init(void) -{ - int reg; - -#ifdef CONFIG_TRICKLE_CHARGING - const struct battery_info *bi = battery_get_info(); - int precharge_voltage = bi->precharge_voltage ? - bi->precharge_voltage : bi->voltage_min; - - if (raw_write16(ISL923X_REG_SYS_VOLTAGE_MIN, precharge_voltage)) - goto init_fail; -#endif - - /* - * [10:9]: Prochot# Debounce time - * 11b: 1ms - */ - if (raw_read16(ISL923X_REG_CONTROL2, ®)) - goto init_fail; - - if (raw_write16(ISL923X_REG_CONTROL2, - reg | - ISL923X_C2_OTG_DEBOUNCE_150 | - ISL923X_C2_PROCHOT_DEBOUNCE_1000 | - ISL923X_C2_ADAPTER_DEBOUNCE_150)) - goto init_fail; - -#ifdef CONFIG_CHARGE_RAMP_HW -#ifdef CONFIG_CHARGER_ISL9237 - if (raw_read16(ISL923X_REG_CONTROL0, ®)) - goto init_fail; - - /* Set input voltage regulation reference voltage for charge ramp */ - reg &= ~ISL9237_C0_VREG_REF_MASK; - reg |= ISL9237_C0_VREG_REF_4200; - - if (raw_write16(ISL923X_REG_CONTROL0, reg)) - goto init_fail; -#else /* !defined(CONFIG_CHARGER_ISL9237) */ - /* - * For the ISL9238, set the input voltage regulation to 4.439V. Note, - * the voltage is set in 341.3 mV steps. - */ - reg = (4439 / ISL9238_INPUT_VOLTAGE_REF_STEP) - << ISL9238_INPUT_VOLTAGE_REF_SHIFT; - - if (raw_write16(ISL9238_REG_INPUT_VOLTAGE, reg)) - goto init_fail; -#endif /* defined(CONFIG_CHARGER_ISL9237) */ -#else /* !defined(CONFIG_CHARGE_RAMP_HW) */ - if (raw_read16(ISL923X_REG_CONTROL0, ®)) - goto init_fail; - - /* Disable voltage regulation loop to disable charge ramp */ - reg |= ISL923X_C0_DISABLE_VREG; - - if (raw_write16(ISL923X_REG_CONTROL0, reg)) - goto init_fail; -#endif /* defined(CONFIG_CHARGE_RAMP_HW) */ - -#ifdef CONFIG_CHARGER_ISL9238 - /* - * Don't reread the prog pin and don't reload the ILIM on ACIN. - */ - if (raw_read16(ISL9238_REG_CONTROL3, ®)) - goto init_fail; - reg |= ISL9238_C3_NO_RELOAD_ACLIM_ON_ACIN | - ISL9238_C3_NO_REREAD_PROG_PIN; - /* - * Disable autonomous charging initially since 1) it causes boot loop - * issues with 2S batteries, and 2) it will automatically get disabled - * as soon as we manually set the current limit anyway. - */ - reg |= ISL9238_C3_DISABLE_AUTO_CHARING; - if (raw_write16(ISL9238_REG_CONTROL3, reg)) - goto init_fail; - - /* - * No need to proceed with the rest of init if we sysjump'd to this - * image as the input current limit has already been set. - */ - if (system_jumped_to_this_image()) - return; - - /* - * Initialize the input current limit to the board's default. - */ - if (charger_set_input_current(CONFIG_CHARGER_INPUT_CURRENT)) - goto init_fail; -#endif /* defined(CONFIG_CHARGER_ISL9238) */ - - return; -init_fail: - CPRINTS("%s failed!", __func__); -} -DECLARE_HOOK(HOOK_INIT, isl923x_init, HOOK_PRIO_INIT_I2C + 1); - -int charger_discharge_on_ac(int enable) -{ - int rv; - int control1; - - mutex_lock(&control1_mutex); - - rv = raw_read16(ISL923X_REG_CONTROL1, &control1); - if (rv) - goto out; - - control1 &= ~ISL923X_C1_LEARN_MODE_AUTOEXIT; - if (enable) - control1 |= ISL923X_C1_LEARN_MODE_ENABLE; - else - control1 &= ~ISL923X_C1_LEARN_MODE_ENABLE; - - rv = raw_write16(ISL923X_REG_CONTROL1, control1); - - learn_mode = !rv && enable; - -out: - mutex_unlock(&control1_mutex); - return rv; -} - -/*****************************************************************************/ -/* Hardware current ramping */ - -#ifdef CONFIG_CHARGE_RAMP_HW -int charger_set_hw_ramp(int enable) -{ - int rv, reg; - - rv = raw_read16(ISL923X_REG_CONTROL0, ®); - if (rv) - return rv; - - /* HW ramp is controlled by input voltage regulation reference bits */ - if (enable) - reg &= ~ISL923X_C0_DISABLE_VREG; - else - reg |= ISL923X_C0_DISABLE_VREG; - - return raw_write16(ISL923X_REG_CONTROL0, reg); -} - -int chg_ramp_is_stable(void) -{ - /* - * Since ISL cannot read the current limit that the ramp has settled - * on, then we can never consider the ramp stable, because we never - * know what the stable limit is. - */ - return 0; -} - -int chg_ramp_is_detected(void) -{ - return 1; -} - -int chg_ramp_get_current_limit(void) -{ - /* - * ISL doesn't have a way to get this info, so return the nominal - * current limit as an estimate. - */ - int input_current; - - if (charger_get_input_current(&input_current) != EC_SUCCESS) - return 0; - return input_current; -} -#endif /* CONFIG_CHARGE_RAMP_HW */ - - -#ifdef CONFIG_CHARGER_PSYS -static int psys_enabled; - -static void charger_enable_psys(void) -{ - int val; - - mutex_lock(&control1_mutex); - - /* - * enable system power monitor PSYS function - */ - if (raw_read16(ISL923X_REG_CONTROL1, &val)) - goto out; - - val |= ISL923X_C1_ENABLE_PSYS; - - if (raw_write16(ISL923X_REG_CONTROL1, val)) - goto out; - - psys_enabled = 1; - -out: - mutex_unlock(&control1_mutex); -} -DECLARE_HOOK(HOOK_CHIPSET_STARTUP, charger_enable_psys, HOOK_PRIO_DEFAULT); - -static void charger_disable_psys(void) -{ - int val; - - mutex_lock(&control1_mutex); - - /* - * disable system power monitor PSYS function - */ - if (raw_read16(ISL923X_REG_CONTROL1, &val)) - goto out; - - val &= ~ISL923X_C1_ENABLE_PSYS; - - if (raw_write16(ISL923X_REG_CONTROL1, val)) - goto out; - - psys_enabled = 0; - -out: - mutex_unlock(&control1_mutex); -} -DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, charger_disable_psys, HOOK_PRIO_DEFAULT); - -#ifdef CONFIG_CHARGER_PSYS_READ -int charger_get_system_power(void) -{ - int adc; - - /* - * If PSYS is not enabled, AP is probably off, and the value is usually - * too small to be measured acurately anyway. - */ - if (!psys_enabled) - return -1; - - /* - * We assume that the output gain is always left to the default - * 1.44 uA/W, and that the ADC scaling values are setup accordingly in - * board file, so that the value is indicated in uW. - */ - adc = adc_read_channel(ADC_PSYS); - - return adc; -} - -static int console_command_psys(int argc, char **argv) -{ - ccprintf("PSYS = %d uW\n", charger_get_system_power()); - return 0; -} -DECLARE_CONSOLE_COMMAND(psys, console_command_psys, - NULL, - "Get the system power in mW"); -#endif /* CONFIG_CHARGER_PSYS_READ */ -#endif /* CONFIG_CHARGER_PSYS */ - -#ifdef CONFIG_CMD_CHARGER_ADC_AMON_BMON -enum amon_bmon { AMON, BMON }; - -static int print_amon_bmon(enum amon_bmon amon, int direction, - int resistor) -{ - int adc, curr, reg, ret; - -#ifdef CONFIG_CHARGER_ISL9238 - ret = i2c_read16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - ISL9238_REG_CONTROL3, ®); - if (ret) - return ret; - - /* Switch direction */ - if (direction) - reg |= ISL9238_C3_AMON_BMON_DIRECTION; - else - reg &= ~ISL9238_C3_AMON_BMON_DIRECTION; - ret = i2c_write16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - ISL9238_REG_CONTROL3, reg); - if (ret) - return ret; -#endif - - mutex_lock(&control1_mutex); - - ret = i2c_read16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - ISL923X_REG_CONTROL1, ®); - if (!ret) { - /* Switch between AMON/BMON */ - if (amon == AMON) - reg &= ~ISL923X_C1_SELECT_BMON; - else - reg |= ISL923X_C1_SELECT_BMON; - - /* Enable monitor */ - reg &= ~ISL923X_C1_DISABLE_MON; - ret = i2c_write16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - ISL923X_REG_CONTROL1, reg); - } - - mutex_unlock(&control1_mutex); - - if (ret) - return ret; - - adc = adc_read_channel(ADC_AMON_BMON); - curr = adc / resistor; - ccprintf("%cMON(%sharging): %d uV, %d mA\n", amon == AMON ? 'A' : 'B', - direction ? "Disc" : "C", adc, curr); - - return ret; -} - -/** - * Get charger AMON and BMON current. - */ -static int console_command_amon_bmon(int argc, char **argv) -{ - int ret = EC_SUCCESS; - int print_ac = 1; - int print_battery = 1; - int print_charge = 1; - int print_discharge = 1; - - if (argc >= 2) { - print_ac = (argv[1][0] == 'a'); - print_battery = (argv[1][0] == 'b'); -#ifdef CONFIG_CHARGER_ISL9238 - if (argv[1][1] != '\0') { - print_charge = (argv[1][1] == 'c'); - print_discharge = (argv[1][1] == 'd'); - } -#endif - } - - if (print_ac) { - if (print_charge) - ret |= print_amon_bmon(AMON, 0, - CONFIG_CHARGER_SENSE_RESISTOR_AC); -#ifdef CONFIG_CHARGER_ISL9238 - if (print_discharge) - ret |= print_amon_bmon(AMON, 1, - CONFIG_CHARGER_SENSE_RESISTOR_AC); -#endif - } - - if (print_battery) { -#ifdef CONFIG_CHARGER_ISL9238 - if (print_charge) - ret |= print_amon_bmon(BMON, 0, - /* - * charging current monitor has - * 2x amplification factor - */ - 2*CONFIG_CHARGER_SENSE_RESISTOR); -#endif - if (print_discharge) - ret |= print_amon_bmon(BMON, 1, - CONFIG_CHARGER_SENSE_RESISTOR); - } - - return ret; -} -DECLARE_CONSOLE_COMMAND(amonbmon, console_command_amon_bmon, -#ifdef CONFIG_CHARGER_ISL9237 - "amonbmon [a|b]", -#else - "amonbmon [a[c|d]|b[c|d]]", -#endif - "Get charger AMON/BMON voltage diff, current"); -#endif /* CONFIG_CMD_CHARGER_ADC_AMON_BMON */ - -#ifdef CONFIG_CMD_CHARGER_DUMP -static void dump_reg_range(int low, int high) -{ - int reg; - int regval; - int rv; - - for (reg = low; reg <= high; reg++) { - CPRINTF("[%Xh] = ", reg); - rv = i2c_read16(I2C_PORT_CHARGER, I2C_ADDR_CHARGER_FLAGS, - reg, ®val); - if (!rv) - CPRINTF("0x%04x\n", regval); - else - CPRINTF("ERR (%d)\n", rv); - cflush(); - } -} - -static int command_isl923x_dump(int argc, char **argv) -{ - dump_reg_range(0x14, 0x15); - dump_reg_range(0x38, 0x3F); - dump_reg_range(0x47, 0x4A); -#ifdef CONFIG_CHARGER_ISL9238 - dump_reg_range(0x4B, 0x4E); -#endif /* CONFIG_CHARGER_ISL9238 */ - dump_reg_range(0xFE, 0xFF); - - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(charger_dump, command_isl923x_dump, "", - "Dumps ISL923x registers"); -#endif /* CONFIG_CMD_CHARGER_DUMP */ |