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// SPDX-License-Identifier: GPL-2.0
/*
* Power Supply for UCSI
*
* Copyright (C) 2020, Intel Corporation
* Author: K V, Abhilash <abhilash.k.v@intel.com>
* Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
*/
#include <linux/property.h>
#include <linux/usb/pd.h>
#include "ucsi.h"
/* Power Supply access to expose source power information */
enum ucsi_psy_online_states {
UCSI_PSY_OFFLINE = 0,
UCSI_PSY_FIXED_ONLINE,
UCSI_PSY_PROG_ONLINE,
};
static enum power_supply_property ucsi_psy_props[] = {
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int ucsi_psy_get_online(struct ucsi_connector *con,
union power_supply_propval *val)
{
val->intval = UCSI_PSY_OFFLINE;
if (con->status.flags & UCSI_CONSTAT_CONNECTED &&
(con->status.flags & UCSI_CONSTAT_PWR_DIR) == TYPEC_SINK)
val->intval = UCSI_PSY_FIXED_ONLINE;
return 0;
}
static int ucsi_psy_get_voltage_min(struct ucsi_connector *con,
union power_supply_propval *val)
{
u32 pdo;
switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
case UCSI_CONSTAT_PWR_OPMODE_PD:
pdo = con->src_pdos[0];
val->intval = pdo_fixed_voltage(pdo) * 1000;
break;
case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
case UCSI_CONSTAT_PWR_OPMODE_BC:
case UCSI_CONSTAT_PWR_OPMODE_DEFAULT:
val->intval = UCSI_TYPEC_VSAFE5V * 1000;
break;
default:
val->intval = 0;
break;
}
return 0;
}
static int ucsi_psy_get_voltage_max(struct ucsi_connector *con,
union power_supply_propval *val)
{
u32 pdo;
switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
case UCSI_CONSTAT_PWR_OPMODE_PD:
if (con->num_pdos > 0) {
pdo = con->src_pdos[con->num_pdos - 1];
val->intval = pdo_fixed_voltage(pdo) * 1000;
} else {
val->intval = 0;
}
break;
case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
case UCSI_CONSTAT_PWR_OPMODE_BC:
case UCSI_CONSTAT_PWR_OPMODE_DEFAULT:
val->intval = UCSI_TYPEC_VSAFE5V * 1000;
break;
default:
val->intval = 0;
break;
}
return 0;
}
static int ucsi_psy_get_voltage_now(struct ucsi_connector *con,
union power_supply_propval *val)
{
int index;
u32 pdo;
switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
case UCSI_CONSTAT_PWR_OPMODE_PD:
index = rdo_index(con->rdo);
if (index > 0) {
pdo = con->src_pdos[index - 1];
val->intval = pdo_fixed_voltage(pdo) * 1000;
} else {
val->intval = 0;
}
break;
case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
case UCSI_CONSTAT_PWR_OPMODE_BC:
case UCSI_CONSTAT_PWR_OPMODE_DEFAULT:
val->intval = UCSI_TYPEC_VSAFE5V * 1000;
break;
default:
val->intval = 0;
break;
}
return 0;
}
static int ucsi_psy_get_current_max(struct ucsi_connector *con,
union power_supply_propval *val)
{
u32 pdo;
switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
case UCSI_CONSTAT_PWR_OPMODE_PD:
if (con->num_pdos > 0) {
pdo = con->src_pdos[con->num_pdos - 1];
val->intval = pdo_max_current(pdo) * 1000;
} else {
val->intval = 0;
}
break;
case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
val->intval = UCSI_TYPEC_1_5_CURRENT * 1000;
break;
case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
val->intval = UCSI_TYPEC_3_0_CURRENT * 1000;
break;
case UCSI_CONSTAT_PWR_OPMODE_BC:
case UCSI_CONSTAT_PWR_OPMODE_DEFAULT:
/* UCSI can't tell b/w DCP/CDP or USB2/3x1/3x2 SDP chargers */
default:
val->intval = 0;
break;
}
return 0;
}
static int ucsi_psy_get_current_now(struct ucsi_connector *con,
union power_supply_propval *val)
{
u16 flags = con->status.flags;
if (UCSI_CONSTAT_PWR_OPMODE(flags) == UCSI_CONSTAT_PWR_OPMODE_PD)
val->intval = rdo_op_current(con->rdo) * 1000;
else
val->intval = 0;
return 0;
}
static int ucsi_psy_get_usb_type(struct ucsi_connector *con,
union power_supply_propval *val)
{
u16 flags = con->status.flags;
val->intval = POWER_SUPPLY_USB_TYPE_C;
if (flags & UCSI_CONSTAT_CONNECTED &&
UCSI_CONSTAT_PWR_OPMODE(flags) == UCSI_CONSTAT_PWR_OPMODE_PD)
val->intval = POWER_SUPPLY_USB_TYPE_PD;
return 0;
}
static int ucsi_psy_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ucsi_connector *con = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_USB_TYPE:
return ucsi_psy_get_usb_type(con, val);
case POWER_SUPPLY_PROP_ONLINE:
return ucsi_psy_get_online(con, val);
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
return ucsi_psy_get_voltage_min(con, val);
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
return ucsi_psy_get_voltage_max(con, val);
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
return ucsi_psy_get_voltage_now(con, val);
case POWER_SUPPLY_PROP_CURRENT_MAX:
return ucsi_psy_get_current_max(con, val);
case POWER_SUPPLY_PROP_CURRENT_NOW:
return ucsi_psy_get_current_now(con, val);
default:
return -EINVAL;
}
}
static enum power_supply_usb_type ucsi_psy_usb_types[] = {
POWER_SUPPLY_USB_TYPE_C,
POWER_SUPPLY_USB_TYPE_PD,
POWER_SUPPLY_USB_TYPE_PD_PPS,
};
int ucsi_register_port_psy(struct ucsi_connector *con)
{
struct power_supply_config psy_cfg = {};
struct device *dev = con->ucsi->dev;
char *psy_name;
psy_cfg.drv_data = con;
psy_cfg.fwnode = dev_fwnode(dev);
psy_name = devm_kasprintf(dev, GFP_KERNEL, "ucsi-source-psy-%s%d",
dev_name(dev), con->num);
if (!psy_name)
return -ENOMEM;
con->psy_desc.name = psy_name;
con->psy_desc.type = POWER_SUPPLY_TYPE_USB,
con->psy_desc.usb_types = ucsi_psy_usb_types;
con->psy_desc.num_usb_types = ARRAY_SIZE(ucsi_psy_usb_types);
con->psy_desc.properties = ucsi_psy_props,
con->psy_desc.num_properties = ARRAY_SIZE(ucsi_psy_props),
con->psy_desc.get_property = ucsi_psy_get_prop;
con->psy = power_supply_register(dev, &con->psy_desc, &psy_cfg);
return PTR_ERR_OR_ZERO(con->psy);
}
void ucsi_unregister_port_psy(struct ucsi_connector *con)
{
if (IS_ERR_OR_NULL(con->psy))
return;
power_supply_unregister(con->psy);
}
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