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/* Copyright 2016 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.
*/
#include "adc.h"
#include "config.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "registers.h"
#include "system.h"
#include "task.h"
#include "timer.h"
#include "util.h"
#include "usb_mux.h"
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
#define PDO_FIXED_FLAGS (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |\
PDO_FIXED_EXTERNAL | PDO_FIXED_COMM_CAP)
/* Threshold voltage of VBUS provided (mV) */
#define PD_VBUS_PROVIDED_THRESHOLD 3900
const uint32_t pd_src_pdo[] = {
PDO_FIXED(5000, 1500, PDO_FIXED_FLAGS),
};
const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo);
const uint32_t pd_snk_pdo[] = {
PDO_FIXED(5000, 500, PDO_FIXED_FLAGS),
PDO_BATT(4500, 14000, 10000),
PDO_VAR(4500, 14000, 3000),
};
const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);
int pd_is_max_request_allowed(void)
{
/* max voltage request allowed */
return 1;
}
int pd_snk_is_vbus_provided(int port)
{
int mv = adc_read_channel(port == USBPD_PORT_A ?
ADC_VBUSSA : ADC_VBUSSB);
/* level shift voltage of VBUS > threshold */
return (mv * 23 / 3) > PD_VBUS_PROVIDED_THRESHOLD;
}
int pd_set_power_supply_ready(int port)
{
/* provide VBUS */
board_pd_vbus_ctrl(port, 1);
/* vbus provided or not */
return !pd_snk_is_vbus_provided(port);
}
void pd_power_supply_reset(int port)
{
/* Kill VBUS */
board_pd_vbus_ctrl(port, 0);
}
int pd_check_data_swap(int port, int data_role)
{
/* Always allow data swap: we can be DFP or UFP for USB */
return 1;
}
int pd_check_vconn_swap(int port)
{
/*
* VCONN is provided directly by the battery(PPVAR_SYS)
* but use the same rules as power swap
*/
return pd_get_dual_role(port) == PD_DRP_TOGGLE_ON ? 1 : 0;
}
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