include/usb_ether.h

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