glider/fw/usb_pd_driver.c

//
// Copyright 2024 Wenting Zhang <zephray@outlook.com>
// Copyright 2017 Jason Cerundolo
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
#include "pico/stdlib.h"
#include <stdio.h>
#include "usb_pd_driver.h"
#include "usb_pd.h"

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(t) (sizeof(t) / sizeof(t[0]))
#endif

extern struct tc_module tc_instance;
extern uint32_t g_us_timestamp_upper_32bit;

uint32_t pd_task_set_event(uint32_t event, int wait_for_reply)
{
	switch (event)
	{
		case PD_EVENT_TX:
			break;
		default:
			break;
	}
	return 0;
}

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),
};
const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);

void pd_set_input_current_limit(int port, uint32_t max_ma,
	uint32_t supply_voltage)
{
	printf("Setting input current limit to %d V %d mA\n", supply_voltage, max_ma);
}

int pd_is_valid_input_voltage(int mv)
{
	printf("Checking valid input voltage %d mV\n", mv);
	return (mv < 5500);
}

int pd_snk_is_vbus_provided(int port)
{
	return 1;
}

timestamp_t get_time(void)
{
	absolute_time_t t = get_absolute_time();
#ifdef NDEBUG
	return (timestamp_t)t;
#else
	return (timestamp_t)t._private_us_since_boot;
#endif
}

void pd_power_supply_reset(int port)
{
	return;
}

int pd_custom_vdm(int port, int cnt, uint32_t *payload,
		  uint32_t **rpayload)
{
#if 0
	int cmd = PD_VDO_CMD(payload[0]);
	uint16_t dev_id = 0;
	int is_rw, is_latest;

	/* make sure we have some payload */
	if (cnt == 0)
		return 0;

	switch (cmd) {
	case VDO_CMD_VERSION:
		/* guarantee last byte of payload is null character */
		*(payload + cnt - 1) = 0;
		//CPRINTF("version: %s\n", (char *)(payload+1));
		break;
	case VDO_CMD_READ_INFO:
	case VDO_CMD_SEND_INFO:
		/* copy hash */
		if (cnt == 7) {
			dev_id = VDO_INFO_HW_DEV_ID(payload[6]);
			is_rw = VDO_INFO_IS_RW(payload[6]);

			is_latest = pd_dev_store_rw_hash(port,
							 dev_id,
							 payload + 1,
							 is_rw ?
							 SYSTEM_IMAGE_RW :
							 SYSTEM_IMAGE_RO);

			/*
			 * Send update host event unless our RW hash is
			 * already known to be the latest update RW.
			 */
			if (!is_rw || !is_latest)
				pd_send_host_event(PD_EVENT_UPDATE_DEVICE);

			//CPRINTF("DevId:%d.%d SW:%d RW:%d\n",
			//	HW_DEV_ID_MAJ(dev_id),
			//	HW_DEV_ID_MIN(dev_id),
			//	VDO_INFO_SW_DBG_VER(payload[6]),
			//	is_rw);
		} else if (cnt == 6) {
			/* really old devices don't have last byte */
			pd_dev_store_rw_hash(port, dev_id, payload + 1,
					     SYSTEM_IMAGE_UNKNOWN);
		}
		break;
	case VDO_CMD_CURRENT:
		CPRINTF("Current: %dmA\n", payload[1]);
		break;
	case VDO_CMD_FLIP:
		/* TODO: usb_mux_flip(port); */
		break;
#ifdef CONFIG_USB_PD_LOGGING
	case VDO_CMD_GET_LOG:
		pd_log_recv_vdm(port, cnt, payload);
		break;
#endif /* CONFIG_USB_PD_LOGGING */
	}
#endif // if 0

	return 0;
}

void pd_execute_data_swap(int port, int data_role)
{
	/* Do nothing */
}

int pd_check_data_swap(int port, int data_role)
{
	// Never allow data swap
	return 0;
}

int pd_check_power_swap(int port)
{
	/* Always refuse power swap */
	return 0;
}

int pd_board_checks(void)
{
	return EC_SUCCESS;
}

int pd_set_power_supply_ready(int port)
{
#if 0
	/* Disable charging */
	gpio_set_level(GPIO_USB_C0_CHARGE_L, 1);

	/* Enable VBUS source */
	gpio_set_level(GPIO_USB_C0_5V_EN, 1);

	/* notify host of power info change */
	pd_send_host_event(PD_EVENT_POWER_CHANGE);
#endif // if 0
	return EC_SUCCESS; /* we are ready */
}

void pd_transition_voltage(int idx)
{
	/* No-operation: we are always 5V */
	
#if 0
	timestamp_t deadline;
	uint32_t mv = src_pdo_charge[idx - 1].mv;

	/* Is this a transition to a new voltage? */
	if (charge_port_is_active() && vbus[CHG].mv != mv) {
		/*
		 * Alter voltage limit on charge port, this should cause
		 * the port to select the desired PDO.
		 */
		pd_set_external_voltage_limit(CHG, mv);

		/* Wait for CHG transition */
		deadline.val = get_time().val + PD_T_PS_TRANSITION;
		CPRINTS("Waiting for CHG port transition");
		while (charge_port_is_active() &&
		       vbus[CHG].mv != mv &&
		       get_time().val < deadline.val)
			msleep(10);

		if (vbus[CHG].mv != mv) {
			CPRINTS("Missed CHG transition, resetting DUT");
			pd_power_supply_reset(DUT);
			return;
		}

		CPRINTS("CHG transitioned");
	}

	vbus[DUT].mv = vbus[CHG].mv;
	vbus[DUT].ma = vbus[CHG].ma;
#endif // if 0

}

void pd_check_dr_role(int port, int dr_role, int flags)
{
#if 0
	/* If UFP, try to switch to DFP */
	if ((flags & PD_FLAGS_PARTNER_DR_DATA) && dr_role == PD_ROLE_UFP)
	pd_request_data_swap(port);
#endif
}

void pd_check_pr_role(int port, int pr_role, int flags)
{
#if 0
	/*
	 * If partner is dual-role power and dualrole toggling is on, consider
	 * if a power swap is necessary.
	 */
	if ((flags & PD_FLAGS_PARTNER_DR_POWER) &&
	    pd_get_dual_role() == PD_DRP_TOGGLE_ON) {
		/*
		 * If we are a sink and partner is not externally powered, then
		 * swap to become a source. If we are source and partner is
		 * externally powered, swap to become a sink.
		 */
		int partner_extpower = flags & PD_FLAGS_PARTNER_EXTPOWER;

		if ((!partner_extpower && pr_role == PD_ROLE_SINK) ||
		     (partner_extpower && pr_role == PD_ROLE_SOURCE))
			pd_request_power_swap(port);
	}
#endif // if 0
}