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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Frostflow board-specific USB-C mux configuration */
#include "ioexpander.h"
#include "usbc/usb_muxes.h"
#define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ##args)
#define CPRINTFUSB(format, args...) cprintf(CC_USBCHARGE, format, ##args)
/*
* USB C0 (general) and C1 (just ps8815 DB) use IOEX pins to
* indicate flipped polarity to a protection switch.
*/
static int ioex_set_flip(int port, mux_state_t mux_state)
{
if (port == 0) {
if (mux_state & USB_PD_MUX_POLARITY_INVERTED)
gpio_pin_set_dt(
GPIO_DT_FROM_NODELABEL(ioex_usb_c0_sbu_flip),
1);
else
gpio_pin_set_dt(
GPIO_DT_FROM_NODELABEL(ioex_usb_c0_sbu_flip),
0);
} else {
if (mux_state & USB_PD_MUX_POLARITY_INVERTED)
gpio_pin_set_dt(
GPIO_DT_FROM_NODELABEL(ioex_usb_c1_sbu_flip),
1);
else
gpio_pin_set_dt(
GPIO_DT_FROM_NODELABEL(ioex_usb_c1_sbu_flip),
0);
}
return EC_SUCCESS;
}
int board_c0_amd_fp6_mux_set(const struct usb_mux *me, mux_state_t mux_state)
{
/* Set the SBU polarity mux */
RETURN_ERROR(ioex_set_flip(me->usb_port, mux_state));
return EC_SUCCESS;
}
int board_c1_ps8818_mux_set(const struct usb_mux *me, mux_state_t mux_state)
{
CPRINTSUSB("C1: PS8818 mux using default tuning");
/* Once a DP connection is established, we need to set IN_HPD */
if (mux_state & USB_PD_MUX_DP_ENABLED)
ioex_set_level(IOEX_USB_C1_HPD_IN_DB, 1);
else
ioex_set_level(IOEX_USB_C1_HPD_IN_DB, 0);
return 0;
}
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