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/* Copyright 2015 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.
*/
/* Ryu-custom USB mux driver. */
#include "common.h"
#include "gpio.h"
#include "usb_mux.h"
#include "util.h"
static int board_init_usb_mux(int port)
{
return EC_SUCCESS;
}
static int board_set_usb_mux(int port, mux_state_t mux_state)
{
/* reset everything */
gpio_set_level(GPIO_USBC_MUX_CONF0, 0);
gpio_set_level(GPIO_USBC_MUX_CONF1, 0);
gpio_set_level(GPIO_USBC_MUX_CONF2, 0);
if (!(mux_state & (MUX_USB_ENABLED | MUX_DP_ENABLED)))
/* everything is already disabled, we can return */
return EC_SUCCESS;
gpio_set_level(GPIO_USBC_MUX_CONF0, mux_state & MUX_POLARITY_INVERTED);
if (mux_state & MUX_USB_ENABLED)
/* USB 3.0 uses 2 superspeed lanes */
gpio_set_level(GPIO_USBC_MUX_CONF2, 1);
if (mux_state & MUX_DP_ENABLED)
/* DP uses available superspeed lanes (x2 or x4) */
gpio_set_level(GPIO_USBC_MUX_CONF1, 1);
return EC_SUCCESS;
}
static int board_get_usb_mux(int port, mux_state_t *mux_state)
{
*mux_state = 0;
if (gpio_get_level(GPIO_USBC_MUX_CONF2))
*mux_state |= MUX_USB_ENABLED;
if (gpio_get_level(GPIO_USBC_MUX_CONF1))
*mux_state |= MUX_DP_ENABLED;
if (gpio_get_level(GPIO_USBC_MUX_CONF0))
*mux_state |= MUX_POLARITY_INVERTED;
return EC_SUCCESS;
}
const struct usb_mux_driver board_custom_usb_mux_driver = {
.init = board_init_usb_mux,
.set = board_set_usb_mux,
.get = board_get_usb_mux,
};
struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_COUNT] = {
{
.port_addr = 0,
.driver = &board_custom_usb_mux_driver,
},
};
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