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/* Copyright 2023 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* USB-C Power Path Controller via TCPCI conformant TCPC */
#include "atomic.h"
#include "common.h"
#include "console.h"
#include "driver/tcpm/tcpci.h"
#include "usbc_ppc.h"
#define TCPCI_PPC_FLAGS_SOURCE_ENABLED BIT(0)
static atomic_t flags[CONFIG_USB_PD_PORT_MAX_COUNT];
static int tcpci_ppc_is_sourcing_vbus(int port)
{
return (flags[port] & TCPCI_PPC_FLAGS_SOURCE_ENABLED);
}
static int tcpci_ppc_vbus_source_enable(int port, int enable)
{
RETURN_ERROR(tcpci_tcpm_set_src_ctrl(port, enable));
if (enable)
atomic_or(&flags[port], TCPCI_PPC_FLAGS_SOURCE_ENABLED);
else
atomic_clear_bits(&flags[port], TCPCI_PPC_FLAGS_SOURCE_ENABLED);
/*
* Since the VBUS state could be changing here, need to wake the
* USB_CHG_N task so that BC 1.2 detection will be triggered.
*/
if (IS_ENABLED(CONFIG_USB_CHARGER) &&
IS_ENABLED(CONFIG_USB_PD_VBUS_DETECT_PPC))
usb_charger_vbus_change(port, enable);
return EC_SUCCESS;
}
#ifdef CONFIG_USB_PD_VBUS_DETECT_PPC
static int tcpci_is_vbus_present(int port)
{
int status;
if (tcpci_tcpm_get_power_status(port, &status))
return 0;
return !!(status & TCPC_REG_POWER_STATUS_VBUS_PRES);
}
#endif
static int tcpci_ppc_discharge_vbus(int port, int enable)
{
tcpci_tcpc_discharge_vbus(port, enable);
return EC_SUCCESS;
}
#ifdef CONFIG_USBC_PPC_POLARITY
static int tcpci_ppc_set_polarity(int port, int polarity)
{
return tcpci_tcpm_set_polarity(port, polarity);
}
#endif
static int tcpci_ppc_init(int port)
{
atomic_clear(&flags[port]);
return EC_SUCCESS;
}
const struct ppc_drv tcpci_ppc_drv = {
.init = &tcpci_ppc_init,
.is_sourcing_vbus = tcpci_ppc_is_sourcing_vbus,
.vbus_sink_enable = tcpci_tcpm_set_snk_ctrl,
.vbus_source_enable = tcpci_ppc_vbus_source_enable,
#ifdef CONFIG_USB_PD_VBUS_DETECT_PPC
.is_vbus_present = tcpci_is_vbus_present,
#endif
.discharge_vbus = tcpci_ppc_discharge_vbus,
#ifdef CONFIG_USBC_PPC_POLARITY
.set_polarity = tcpci_ppc_set_polarity,
#endif
};
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