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/* Copyright 2017 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.
*
* SILERGY SY21612 buck-boost converter driver.
*/
#include "console.h"
#include "hooks.h"
#include "i2c.h"
#include "sy21612.h"
#include "task.h"
#include "util.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_CHARGER, outstr)
#define CPRINTF(format, args...) cprintf(CC_CHARGER, format, ## args)
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
static int sy21612_clear_set_reg(int reg, int clear, int set)
{
int val, old_val, rv;
rv = i2c_read8__7bf(I2C_PORT_SY21612, SY21612_ADDR__7bf, reg, &old_val);
if (rv)
return rv;
val = old_val;
val &= ~clear;
val |= set;
if (val != old_val || clear || set)
rv = i2c_write8__7bf(I2C_PORT_SY21612, SY21612_ADDR__7bf,
reg, val);
return rv;
}
static int sy21612_read(int reg, int *val)
{
return i2c_read8__7bf(I2C_PORT_SY21612, SY21612_ADDR__7bf, reg, val);
}
int sy21612_enable_regulator(int enable)
{
return enable ?
sy21612_clear_set_reg(SY21612_CTRL1, 0, SY21612_CTRL1_REG_EN) :
sy21612_clear_set_reg(SY21612_CTRL1, SY21612_CTRL1_REG_EN, 0);
}
int sy21612_enable_adc(int enable)
{
return enable ?
sy21612_clear_set_reg(SY21612_CTRL1, 0, SY21612_CTRL1_ADC_EN) :
sy21612_clear_set_reg(SY21612_CTRL1, SY21612_CTRL1_ADC_EN, 0);
}
int sy21612_set_adc_mode(int auto_mode)
{
return auto_mode ?
sy21612_clear_set_reg(SY21612_CTRL1,
0, SY21612_CTRL1_ADC_AUTO_MODE) :
sy21612_clear_set_reg(SY21612_CTRL1,
SY21612_CTRL1_ADC_AUTO_MODE, 0);
}
int sy21612_set_vbus_discharge(int auto_discharge)
{
return auto_discharge ?
sy21612_clear_set_reg(SY21612_CTRL1,
SY21612_CTRL1_VBUS_NDISCHG, 0) :
sy21612_clear_set_reg(SY21612_CTRL1,
0, SY21612_CTRL1_VBUS_NDISCHG);
}
int sy21612_set_switching_freq(enum sy21612_switching_freq freq)
{
return sy21612_clear_set_reg(SY21612_CTRL2,
SY21612_CTRL2_FREQ_MASK,
freq << SY21612_CTRL2_FREQ_SHIFT);
}
int sy21612_set_vbus_volt(enum sy21612_vbus_volt volt)
{
return sy21612_clear_set_reg(SY21612_CTRL2,
SY21612_CTRL2_VBUS_MASK,
volt << SY21612_CTRL2_VBUS_SHIFT);
}
int sy21612_set_vbus_adj(enum sy21612_vbus_adj adj)
{
return sy21612_clear_set_reg(SY21612_CTRL2,
SY21612_CTRL2_VBUS_ADJ_MASK,
adj << SY21612_CTRL2_VBUS_ADJ_SHIFT);
}
int sy21612_set_sink_mode(int sink_mode)
{
return sink_mode ?
sy21612_clear_set_reg(SY21612_PROT2,
0, SY21612_PROT2_SINK_MODE) :
sy21612_clear_set_reg(SY21612_PROT2,
SY21612_PROT2_SINK_MODE, 0);
}
int sy21612_is_power_good(void)
{
int reg;
if (sy21612_read(SY21612_STATE, ®))
return 0;
return reg & SY21612_STATE_POWER_GOOD;
}
int sy21612_read_clear_int(void)
{
int reg;
if (sy21612_read(SY21612_INT, ®))
return 0;
return reg;
}
int sy21612_get_vbat_voltage(void)
{
int reg;
if (sy21612_read(SY21612_VBAT_VOLT, ®))
return 0;
return reg * 25000 / 255;
}
int sy21612_get_vbus_voltage(void)
{
int reg;
if (sy21612_read(SY21612_VBUS_VOLT, ®))
return 0;
return reg * 25000 / 255;
}
int sy21612_get_vbus_current(void)
{
int reg;
if (sy21612_read(SY21612_VBUS_CURRENT, ®))
return 0;
/*
* delta V in range 0 ~ 67mV
* sense resistor 10 mOhm
*/
return reg * 6700 / 255;
}
void sy21612_int(enum gpio_signal signal)
{
#ifdef HAS_TASK_SY21612
task_wake(TASK_ID_SY21612);
#endif
}
#ifdef HAS_TASK_SY21612
void sy21612_task(void)
{
int flags;
while (1) {
task_wait_event(-1);
if (sy21612_read(SY21612_INT, &flags))
continue;
/* TODO: notify the error condition and enable regulator */
if (flags & SY21612_INT_VBUS_OCP)
CPUTS("buck-boost VBUS OCP\n");
if (flags & SY21612_INT_INDUCTOR_OCP)
CPUTS("buck-boost inductor OCP\n");
if (flags & SY21612_INT_UVP)
CPUTS("buck-boost UVP\n");
if (flags & SY21612_INT_OTP)
CPUTS("buck-boost OTP\n");
}
}
#endif
#ifdef CONFIG_CMD_CHARGER
static int command_sy21612(int argc, char **argv)
{
int i, val, rv;
ccputs("sy21612 regs:\n");
for (i = 0; i < 9; i++) {
ccprintf("[%02x] ", i);
rv = sy21612_read(i, &val);
if (rv)
ccprintf(" x (%d)\n", rv);
else
ccprintf("%02x - %08b\n", val, val);
}
ccprintf("vbat voltage: %d mV\n", sy21612_get_vbat_voltage());
ccprintf("vbus voltage: %d mV\n", sy21612_get_vbus_voltage());
ccprintf("vbus current: %d mA\n", sy21612_get_vbus_current());
return 0;
}
DECLARE_CONSOLE_COMMAND(sy21612, command_sy21612,
NULL, NULL);
#endif
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