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/* Copyright 2020 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.
*/
/* MPS MP4245 Buck-Boost converter driver. */
#include "common.h"
#include "console.h"
#include "i2c.h"
#include "mp4245.h"
#include "util.h"
static int mp4245_reg16_write(int offset, int data)
{
return i2c_write16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS, offset,
data);
}
int mp4245_set_voltage_out(int desired_mv)
{
int vout;
/*
* For a desired voltage output Vdes, Vout = Vdes * 1024. This means
* there are 10 fractional and 6 integer bits. Vdes is stored in in mV
* so this scaling to mV must also be accounted for.
*
* VOUT_COMMAND = (Vdes (mV) * 1024 / 1000) / 1024
*/
vout = (desired_mv * MP4245_VOUT_FROM_MV + (MP4245_VOUT_1V >> 1))
/ MP4245_VOUT_1V;
return mp4245_reg16_write(MP4245_CMD_VOUT_COMMAND, vout);
}
int mp4245_set_current_lim(int desired_ma)
{
int limit;
/* Current limit is stored as number of 50 mA steps */
limit = (desired_ma + (MP4245_ILIM_STEP_MA / 2)) / MP4245_ILIM_STEP_MA;
return mp4245_reg16_write(MP4245_CMD_MFR_CURRENT_LIM, limit);
}
int mp4245_votlage_out_enable(int enable)
{
int cmd_val = enable ? MP4245_CMD_OPERATION_ON : 0;
return i2c_write8(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_OPERATION, cmd_val);
}
int mp3245_get_vbus(int *mv, int *ma)
{
int vbus = 0;
int ibus = 0;
int rv;
/* Get Vbus/Ibus raw measurements */
rv = i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_READ_VOUT, &vbus);
rv |= i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_READ_IOUT, &ibus);
if (rv == EC_SUCCESS) {
/* Convert Vbus/Ibus to mV/mA */
vbus = MP4245_VOUT_TO_MV(vbus);
ibus = MP4245_IOUT_TO_MA(ibus);
}
*mv = vbus;
*ma = ibus;
return rv;
}
struct mp4245_info {
uint8_t cmd;
uint8_t len;
};
static struct mp4245_info mp4245_cmds[] = {
{MP4245_CMD_OPERATION, 1},
{MP4245_CMD_CLEAR_FAULTS, 1},
{MP4245_CMD_WRITE_PROTECT, 1},
{MP4245_CMD_STORE_USER_ALL, 1},
{MP4245_CMD_RESTORE_USER_ALL, 1},
{MP4245_CMD_VOUT_MODE, 1},
{MP4245_CMD_VOUT_COMMAND, 2},
{MP4245_CMD_VOUT_SCALE_LOOP, 2},
{MP4245_CMD_STATUS_BYTE, 1},
{MP4245_CMD_STATUS_WORD, 2},
{MP4245_CMD_STATUS_VOUT, 1},
{MP4245_CMD_STATUS_INPUT, 1},
{MP4245_CMD_STATUS_TEMP, 1},
{MP4245_CMD_STATUS_CML, 1},
{MP4245_CMD_READ_VIN, 2},
{MP4245_CMD_READ_VOUT, 2},
{MP4245_CMD_READ_IOUT, 2},
{MP4245_CMD_READ_TEMP, 2},
{MP4245_CMD_MFR_MODE_CTRL, 1},
{MP4245_CMD_MFR_CURRENT_LIM, 1},
{MP4245_CMD_MFR_LINE_DROP, 1},
{MP4245_CMD_MFR_OT_FAULT_LIM, 1},
{MP4245_CMD_MFR_OT_WARN_LIM, 1},
{MP4245_CMD_MFR_CRC_ERROR, 1},
{MP4245_CMD_MFF_MTP_CFG_CODE, 1},
{MP4245_CMD_MFR_MTP_REV_NUM, 1},
{MP4245_CMD_MFR_STATUS_MASK, 1},
};
static void mp4245_dump_reg(void)
{
int i;
int val;
int rv;
for (i = 0; i < ARRAY_SIZE(mp4245_cmds); i++) {
if (mp4245_cmds[i].len == 1) {
rv = i2c_read8(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
mp4245_cmds[i].cmd, &val);
} else {
rv = i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
mp4245_cmds[i].cmd, &val);
}
if (!rv)
ccprintf("[%02x]:\t%04x\n", mp4245_cmds[i].cmd, val);
}
}
void mp4245_get_status(void)
{
int status;
int on;
int vbus;
int ibus;
int ilim;
int vout;
/* Get Operation register */
i2c_read8(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_OPERATION, &on);
/* Vbus on/off is bit 7 */
on >>= 7;
/* Get status word */
i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_STATUS_WORD, &status);
/* Get Vbus measurement */
i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_READ_VOUT, &vbus);
vbus = MP4245_VOUT_TO_MV(vbus);
/* Get Ibus measurement */
i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_READ_IOUT, &ibus);
ibus = MP4245_IOUT_TO_MA(ibus);
/* Get Vout command (sets Vbus level) */
i2c_read16(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_VOUT_COMMAND, &vout);
vout = MP4245_VOUT_TO_MV(vout);
/* Get Input current limit */
i2c_read8(I2C_PORT_MP4245, MP4245_I2C_ADDR_FLAGS,
MP4245_CMD_MFR_CURRENT_LIM, &ilim);
ilim *= MP4245_ILIM_STEP_MA;
ccprintf("mp4245 Vbus %s:\n", on ? "On" : "Off");
ccprintf("\tstatus = 0x%04x\n", status);
ccprintf("\tVout = %d mV, Vbus = %d mV\n", vout, vbus);
ccprintf("\tIlim = %d mA, Ibus = %d mA\n", ilim, ibus);
}
static int command_mp4245(int argc, char **argv)
{
char *e;
int val;
if (argc < 2)
return EC_ERROR_PARAM_COUNT;
if (!strcasecmp(argv[1], "info")) {
mp4245_get_status();
} else if (!strcasecmp(argv[1], "dump")) {
mp4245_dump_reg();
} else if (!strcasecmp(argv[1], "vbus")) {
if (argc < 3)
return EC_ERROR_PARAM_COUNT;
val = strtoi(argv[2], &e, 10);
/* If value out of bounds, turn off */
if (val < 0 || val > 20) {
return EC_ERROR_PARAM2;
}
if (val == 0) {
mp4245_votlage_out_enable(0);
} else {
mp4245_set_voltage_out(val * 1000);
mp4245_votlage_out_enable(1);
}
} else {
return EC_ERROR_PARAM1;
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(mp4245, command_mp4245,
"<info|dump|vbus|ilim>",
"Turn on/off|set vbus.");
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