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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2011 The Chromium OS Authors.
*/
#ifndef __USB_ETHER_H__
#define __USB_ETHER_H__
#include <net.h>
/* TODO(sjg@chromium.org): Remove @pusb_dev now that all boards use CONFIG_DM_ETH */
struct ueth_data {
/* eth info */
uint8_t *rxbuf;
int rxsize;
int rxlen; /* Total bytes available in rxbuf */
int rxptr; /* Current position in rxbuf */
int phy_id; /* mii phy id */
/* usb info */
struct usb_device *pusb_dev; /* this usb_device */
unsigned char ifnum; /* interface number */
unsigned char ep_in; /* in endpoint */
unsigned char ep_out; /* out ....... */
unsigned char ep_int; /* interrupt . */
unsigned char subclass; /* as in overview */
unsigned char protocol; /* .............. */
unsigned char irqinterval; /* Intervall for IRQ Pipe */
};
/**
* usb_ether_register() - register a new USB ethernet device
*
* This selects the correct USB interface and figures out the endpoints to use.
*
* @dev: USB device
* @ss: Place to put USB ethernet data
* @rxsize: Maximum size to allocate for the receive buffer
* Return: 0 if OK, -ve on error
*/
int usb_ether_register(struct udevice *dev, struct ueth_data *ueth, int rxsize);
/**
* usb_ether_deregister() - deregister a USB ethernet device
*
* @ueth: USB Ethernet device
* Return: 0
*/
int usb_ether_deregister(struct ueth_data *ueth);
/**
* usb_ether_receive() - recieve a packet from the bulk in endpoint
*
* The packet is stored in the internal buffer ready for processing.
*
* @ueth: USB Ethernet device
* @rxsize: Maximum size to receive
* Return: 0 if a packet was received, -EAGAIN if not, -ENOSPC if @rxsize is
* larger than the size passed ot usb_ether_register(), other -ve on error
*/
int usb_ether_receive(struct ueth_data *ueth, int rxsize);
/**
* usb_ether_get_rx_bytes() - obtain bytes from the internal packet buffer
*
* This should be called repeatedly to obtain packet data until it returns 0.
* After each packet is processed, call usb_ether_advance_rxbuf() to move to
* the next one.
*
* @ueth: USB Ethernet device
* @ptrp: Returns a pointer to the start of the next packet if there is
* one available
* Return: number of bytes available, or 0 if none
*/
int usb_ether_get_rx_bytes(struct ueth_data *ueth, uint8_t **ptrp);
/**
* usb_ether_advance_rxbuf() - Advance to the next packet in the internal buffer
*
* After processing the data returned by usb_ether_get_rx_bytes(), call this
* function to move to the next packet. You must specify the number of bytes
* you have processed in @num_bytes.
*
* @ueth: USB Ethernet device
* @num_bytes: Number of bytes to skip, or -1 to skip all bytes
*/
void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes);
#endif /* __USB_ETHER_H__ */
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