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/* Copyright 2019 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.
*/
/*
* Contains common USB functions shared between the old (i.e. usb_pd_protocol)
* and the new (i.e. usb_sm_*) USB-C PD stacks.
*/
#include "common.h"
#include "charge_state.h"
#include "usb_pd.h"
#include "usb_pd_tcpm.h"
int usb_get_battery_soc(void)
{
#if defined(CONFIG_CHARGER)
return charge_get_percent();
#elif defined(CONFIG_BATTERY)
return board_get_battery_soc();
#else
return 0;
#endif
}
/*
* CC values for regular sources and Debug sources (aka DTS)
*
* Source type Mode of Operation CC1 CC2
* ---------------------------------------------
* Regular Default USB Power RpUSB Open
* Regular USB-C @ 1.5 A Rp1A5 Open
* Regular USB-C @ 3 A Rp3A0 Open
* DTS Default USB Power Rp3A0 Rp1A5
* DTS USB-C @ 1.5 A Rp1A5 RpUSB
* DTS USB-C @ 3 A Rp3A0 RpUSB
*/
typec_current_t usb_get_typec_current_limit(enum pd_cc_polarity_type polarity,
enum tcpc_cc_voltage_status cc1, enum tcpc_cc_voltage_status cc2)
{
typec_current_t charge = 0;
enum tcpc_cc_voltage_status cc = polarity ? cc2 : cc1;
enum tcpc_cc_voltage_status cc_alt = polarity ? cc1 : cc2;
switch (cc) {
case TYPEC_CC_VOLT_RP_3_0:
if (!cc_is_rp(cc_alt) || cc_alt == TYPEC_CC_VOLT_RP_DEF)
charge = 3000;
else if (cc_alt == TYPEC_CC_VOLT_RP_1_5)
charge = 500;
break;
case TYPEC_CC_VOLT_RP_1_5:
charge = 1500;
break;
case TYPEC_CC_VOLT_RP_DEF:
charge = 500;
break;
default:
break;
}
#ifdef CONFIG_USBC_DISABLE_CHARGE_FROM_RP_DEF
if (charge == 500)
charge = 0;
#endif
if (cc_is_rp(cc_alt))
charge |= TYPEC_CURRENT_DTS_MASK;
return charge;
}
enum pd_cc_polarity_type get_snk_polarity(enum tcpc_cc_voltage_status cc1,
enum tcpc_cc_voltage_status cc2)
{
/* The following assumes:
*
* TYPEC_CC_VOLT_RP_3_0 > TYPEC_CC_VOLT_RP_1_5
* TYPEC_CC_VOLT_RP_1_5 > TYPEC_CC_VOLT_RP_DEF
* TYPEC_CC_VOLT_RP_DEF > TYPEC_CC_VOLT_OPEN
*/
return cc2 > cc1;
}
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