drivers/net/bfin_mac.h

   1 /*
   2  * bfin_mac.h - some defines/structures for the Blackfin on-chip MAC.
   3  *
   4  * Copyright (c) 2005-2008 Analog Device, Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef __BFIN_MAC_H__
  10 #define __BFIN_MAC_H__
  11
  12 #define RECV_BUFSIZE            (0x614)
  13
  14 typedef struct ADI_DMA_CONFIG_REG {
  15         u16 b_DMA_EN:1;         /* 0    Enabled                         */
  16         u16 b_WNR:1;            /* 1    Direction                       */
  17         u16 b_WDSIZE:2;         /* 2:3  Transfer word size              */
  18         u16 b_DMA2D:1;          /* 4    DMA mode                        */
  19         u16 b_RESTART:1;        /* 5    Retain FIFO                     */
  20         u16 b_DI_SEL:1;         /* 6    Data interrupt timing select    */
  21         u16 b_DI_EN:1;          /* 7    Data interrupt enabled          */
  22         u16 b_NDSIZE:4;         /* 8:11 Flex descriptor size            */
  23         u16 b_FLOW:3;           /* 12:14Flow                            */
  24 } ADI_DMA_CONFIG_REG;
  25
  26 typedef struct adi_ether_frame_buffer {
  27         u16 NoBytes;            /* the no. of following bytes   */
  28         u8 Dest[6];             /* destination MAC address      */
  29         u8 Srce[6];             /* source MAC address           */
  30         u16 LTfield;            /* length/type field            */
  31         u8 Data[0];             /* payload bytes                */
  32 } ADI_ETHER_FRAME_BUFFER;
  33 /* 16 bytes/struct      */
  34
  35 typedef struct dma_descriptor {
  36         struct dma_descriptor *NEXT_DESC_PTR;
  37         u32 START_ADDR;
  38         union {
  39                 u16 CONFIG_DATA;
  40                 ADI_DMA_CONFIG_REG CONFIG;
  41         };
  42 } DMA_DESCRIPTOR;
  43 /* 10 bytes/struct in 12 bytes */
  44
  45 typedef struct adi_ether_buffer {
  46         DMA_DESCRIPTOR Dma[2];          /* first for the frame, second for the status */
  47         ADI_ETHER_FRAME_BUFFER *FrmData;/* pointer to data */
  48         struct adi_ether_buffer *pNext; /* next buffer */
  49         struct adi_ether_buffer *pPrev; /* prev buffer */
  50         u16 IPHdrChksum;                /* the IP header checksum */
  51         u16 IPPayloadChksum;            /* the IP header and payload checksum */
  52         volatile u32 StatusWord;        /* the frame status word */
  53 } ADI_ETHER_BUFFER;
  54 /* 40 bytes/struct in 44 bytes */
  55
  56 static ADI_ETHER_BUFFER *SetupRxBuffer(int no);
  57 static ADI_ETHER_BUFFER *SetupTxBuffer(int no);
  58
  59 static int bfin_EMAC_init(struct eth_device *dev, bd_t *bd);
  60 static void bfin_EMAC_halt(struct eth_device *dev);
  61 static int bfin_EMAC_send(struct eth_device *dev, volatile void *packet, int length);
  62 static int bfin_EMAC_recv(struct eth_device *dev);
  63 static int bfin_EMAC_setup_addr(struct eth_device *dev);
  64
  65 #endif