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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 <zephyr/drivers/gpio.h>
#include "console.h"
#include "cros_board_info.h"
#include "cros_cbi.h"
#include "driver/retimer/anx7483_public.h"
#include "hooks.h"
#include "ioexpander.h"
#include "usb_mux.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 ANX 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_anx7483_c0_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 anx7483_set_default_tuning(me, mux_state);
}
int board_anx7483_c1_mux_set(const struct usb_mux *me, mux_state_t mux_state)
{
bool flipped = mux_state & USB_PD_MUX_POLARITY_INVERTED;
/* Set the SBU polarity mux */
RETURN_ERROR(ioex_set_flip(me->usb_port, mux_state));
/* Remove flipped from the state for easier compraisons */
mux_state = mux_state & ~USB_PD_MUX_POLARITY_INVERTED;
RETURN_ERROR(anx7483_set_default_tuning(me, mux_state));
if (mux_state == USB_PD_MUX_USB_ENABLED) {
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX2,
ANX7483_EQ_SETTING_12_5DB));
} else if (mux_state == USB_PD_MUX_DP_ENABLED) {
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX2,
ANX7483_EQ_SETTING_12_5DB));
} else if (mux_state == USB_PD_MUX_DOCK && !flipped) {
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX2,
ANX7483_EQ_SETTING_12_5DB));
} else if (mux_state == USB_PD_MUX_DOCK && flipped) {
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX1,
ANX7483_EQ_SETTING_12_5DB));
RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX2,
ANX7483_EQ_SETTING_12_5DB));
}
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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