include/usb_ether.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (c) 2011 The Chromium OS Authors.
   4  */
   5
   6 #ifndef __USB_ETHER_H__
   7 #define __USB_ETHER_H__
   8
   9 #include <net.h>
  10
  11 /*
  12  *      IEEE 802.3 Ethernet magic constants.  The frame sizes omit the preamble
  13  *      and FCS/CRC (frame check sequence).
  14  */
  15 #define ETH_ALEN        6               /* Octets in one ethernet addr   */
  16 #define ETH_HLEN        14              /* Total octets in header.       */
  17 #define ETH_ZLEN        60              /* Min. octets in frame sans FCS */
  18 #define ETH_DATA_LEN    1500            /* Max. octets in payload        */
  19 #define ETH_FRAME_LEN   PKTSIZE_ALIGN   /* Max. octets in frame sans FCS */
  20
  21 /* TODO(sjg@chromium.org): Remove @pusb_dev when all boards use CONFIG_DM_ETH */
  22 struct ueth_data {
  23         /* eth info */
  24 #ifdef CONFIG_DM_ETH
  25         uint8_t *rxbuf;
  26         int rxsize;
  27         int rxlen;                      /* Total bytes available in rxbuf */
  28         int rxptr;                      /* Current position in rxbuf */
  29 #else
  30         struct eth_device eth_dev;      /* used with eth_register */
  31         /* driver private */
  32         void *dev_priv;
  33 #endif
  34         int phy_id;                     /* mii phy id */
  35
  36         /* usb info */
  37         struct usb_device *pusb_dev;    /* this usb_device */
  38         unsigned char   ifnum;          /* interface number */
  39         unsigned char   ep_in;          /* in endpoint */
  40         unsigned char   ep_out;         /* out ....... */
  41         unsigned char   ep_int;         /* interrupt . */
  42         unsigned char   subclass;       /* as in overview */
  43         unsigned char   protocol;       /* .............. */
  44         unsigned char   irqinterval;    /* Intervall for IRQ Pipe */
  45 };
  46
  47 #ifdef CONFIG_DM_ETH
  48 /**
  49  * usb_ether_register() - register a new USB ethernet device
  50  *
  51  * This selects the correct USB interface and figures out the endpoints to use.
  52  *
  53  * @dev:        USB device
  54  * @ss:         Place to put USB ethernet data
  55  * @rxsize:     Maximum size to allocate for the receive buffer
  56  * @return 0 if OK, -ve on error
  57  */
  58 int usb_ether_register(struct udevice *dev, struct ueth_data *ueth, int rxsize);
  59
  60 /**
  61  * usb_ether_deregister() - deregister a USB ethernet device
  62  *
  63  * @ueth:       USB Ethernet device
  64  * @return 0
  65  */
  66 int usb_ether_deregister(struct ueth_data *ueth);
  67
  68 /**
  69  * usb_ether_receive() - recieve a packet from the bulk in endpoint
  70  *
  71  * The packet is stored in the internal buffer ready for processing.
  72  *
  73  * @ueth:       USB Ethernet device
  74  * @rxsize:     Maximum size to receive
  75  * @return 0 if a packet was received, -EAGAIN if not, -ENOSPC if @rxsize is
  76  * larger than the size passed ot usb_ether_register(), other -ve on error
  77  */
  78 int usb_ether_receive(struct ueth_data *ueth, int rxsize);
  79
  80 /**
  81  * usb_ether_get_rx_bytes() - obtain bytes from the internal packet buffer
  82  *
  83  * This should be called repeatedly to obtain packet data until it returns 0.
  84  * After each packet is processed, call usb_ether_advance_rxbuf() to move to
  85  * the next one.
  86  *
  87  * @ueth:       USB Ethernet device
  88  * @ptrp:       Returns a pointer to the start of the next packet if there is
  89  *              one available
  90  * @return number of bytes available, or 0 if none
  91  */
  92 int usb_ether_get_rx_bytes(struct ueth_data *ueth, uint8_t **ptrp);
  93
  94 /**
  95  * usb_ether_advance_rxbuf() - Advance to the next packet in the internal buffer
  96  *
  97  * After processing the data returned by usb_ether_get_rx_bytes(), call this
  98  * function to move to the next packet. You must specify the number of bytes
  99  * you have processed in @num_bytes.
 100  *
 101  * @ueth:       USB Ethernet device
 102  * @num_bytes:  Number of bytes to skip, or -1 to skip all bytes
 103  */
 104 void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes);
 105 #else
 106 /*
 107  * Function definitions for each USB ethernet driver go here
 108  * (declaration is unconditional, compilation is conditional)
 109  */
 110 void asix_eth_before_probe(void);
 111 int asix_eth_probe(struct usb_device *dev, unsigned int ifnum,
 112                       struct ueth_data *ss);
 113 int asix_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 114                       struct eth_device *eth);
 115
 116 void ax88179_eth_before_probe(void);
 117 int ax88179_eth_probe(struct usb_device *dev, unsigned int ifnum,
 118                       struct ueth_data *ss);
 119 int ax88179_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 120                       struct eth_device *eth);
 121
 122 void mcs7830_eth_before_probe(void);
 123 int mcs7830_eth_probe(struct usb_device *dev, unsigned int ifnum,
 124                       struct ueth_data *ss);
 125 int mcs7830_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 126                          struct eth_device *eth);
 127
 128 void smsc95xx_eth_before_probe(void);
 129 int smsc95xx_eth_probe(struct usb_device *dev, unsigned int ifnum,
 130                         struct ueth_data *ss);
 131 int smsc95xx_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 132                         struct eth_device *eth);
 133
 134 void r8152_eth_before_probe(void);
 135 int r8152_eth_probe(struct usb_device *dev, unsigned int ifnum,
 136                     struct ueth_data *ss);
 137 int r8152_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 138                        struct eth_device *eth);
 139 #endif
 140
 141 #endif /* __USB_ETHER_H__ */