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/* ethernet.h -- Definition of types and structures for Ethernet MAC

   Copyright (C) 2001 Erez Volk, erez@mailandnews.comopencores.org

   This file is part of OpenRISC 1000 Architectural Simulator.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/* Exported function prototypes */

void eth_reset( void );

void eth_clock( void );

void eth_status( void );

/* Address space required by one Ethernet MAC */

#define ETH_ADDR_SPACE 0x1000

/* Relative Register Addresses */

#define ETH_MODER           (4 * 0x00)

#define ETH_INT_SOURCE  (4 * 0x01)

#define ETH_INT_MASK    (4 * 0x02)

#define ETH_IPGT            (4 * 0x03)

#define ETH_IPGR1           (4 * 0x04)

#define ETH_IPGR2           (4 * 0x05)

#define ETH_PACKETLEN   (4 * 0x06)

#define ETH_COLLCONF    (4 * 0x07)

#define ETH_RX_BD_ADR   (4 * 0x08)

#define ETH_CTRLMODER   (4 * 0x09)

#define ETH_MIIMODER    (4 * 0x0A)

#define ETH_MIICOMMAND  (4 * 0x0B)

#define ETH_MIIADDRESS  (4 * 0x0C)

#define ETH_MIITX_DATA  (4 * 0x0D)

#define ETH_MIIRX_DATA  (4 * 0x0E)

#define ETH_MIISTATUS   (4 * 0x0F)

#define ETH_MAC_ADDR0   (4 * 0x10)

#define ETH_MAC_ADDR1   (4 * 0x11)

/* Where BD's are stored */

#define ETH_BD_BASE        0x400

#define ETH_BD_COUNT       0x100

#define ETH_BD_SPACE       (4 * ETH_BD_COUNT)

/* Where to point DMA to transmit/receive */

#define ETH_DMA_RX_TX      0x800

/* Field definitions for MODER */

#define ETH_MODER_DMAEN_OFFSET     17

#define ETH_MODER_RECSMALL_OFFSET  16

#define ETH_MODER_PAD_OFFSET       15

#define ETH_MODER_HUGEN_OFFSET     14

#define ETH_MODER_CRCEN_OFFSET     13

#define ETH_MODER_DLYCRCEN_OFFSET  12

#define ETH_MODER_RST_OFFSET       11

#define ETH_MODER_FULLD_OFFSET     10

#define ETH_MODER_EXDFREN_OFFSET   9

#define ETH_MODER_NOBCKOF_OFFSET   8

#define ETH_MODER_LOOPBCK_OFFSET   7

#define ETH_MODER_PRO_OFFSET       5

#define ETH_MODER_IAM_OFFSET       4

#define ETH_MODER_BRO_OFFSET       3

#define ETH_MODER_NOPRE_OFFSET     2

#define ETH_MODER_TXEN_OFFSET      1

#define ETH_MODER_RXEN_OFFSET      0

/* Field definitions for INT_SOURCE */

#define ETH_INT_SOURCE_BUSY_OFFSET 4

#define ETH_INT_SOURCE_RXF_OFFSET  3

#define ETH_INT_SOURCE_RXB_OFFSET  2

#define ETH_INT_SOURCE_TXE_OFFSET  1

#define ETH_INT_SOURCE_TXB_OFFSET  0

/* Field definitions for INT_MASK */

#define ETH_INT_MASK_BUSY_M_OFFSET 4

#define ETH_INT_MASK_RXF_M_OFFSET  3

#define ETH_INT_MASK_RXB_M_OFFSET  2

#define ETH_INT_MASK_TXE_M_OFFSET  1

#define ETH_INT_MASK_TXB_M_OFFSET  0

/* Field definitions for PACKETLEN */

#define ETH_PACKETLEN_MINFL_OFFSET 16

#define ETH_PACKETLEN_MINFL_WIDTH  16

#define ETH_PACKETLEN_MAXFL_OFFSET 0

#define ETH_PACKETLEN_MAXFL_WIDTH  16

/* Field definitions for TX buffer descriptors */

#define ETH_TX_BD_LENGTH_OFFSET        16

#define ETH_TX_BD_LENGTH_WIDTH         16

#define ETH_TX_BD_READY_OFFSET         15

#define ETH_TX_BD_INTERRUPT_OFFSET     14

#define ETH_TX_BD_WRAP_OFFSET          13

#define ETH_TX_BD_PAD_OFFSET           12

#define ETH_TX_BD_CRC_OFFSET           11

#define ETH_TX_BD_LAST_OFFSET          10

#define ETH_TX_BD_PAUSE_OFFSET         9

#define ETH_TX_BD_DEFER_OFFSET         8

#define ETH_TX_BD_COLLISION_OFFSET     7

#define ETH_TX_BD_RETRANSMIT_OFFSET    6

#define ETH_TX_BD_UNDERRUN_OFFSET      5

#define ETH_TX_BD_NO_CARRIER_OFFSET    4

#define ETH_TX_BD_RETRY_OFFSET         0

#define ETH_TX_BD_RETRY_WIDTH          4

/* Field definitions for RX buffer descriptors */

#define ETH_RX_BD_LENGTH_OFFSET        16

#define ETH_RX_BD_LENGTH_WIDTH         16

#define ETH_RX_BD_EMPTY_OFFSET         15

#define ETH_RX_BD_INTERRUPT_OFFSET     14

#define ETH_RX_BD_WRAP_OFFSET          13

#define ETH_RX_BD_LAST_OFFSET          10

#define ETH_RX_BD_PAUSE_OFFSET         9

#define ETH_RX_BD_DEFER_OFFSET         8

#define ETH_RX_BD_COLLISION_OFFSET     7

#define ETH_RX_BD_RETRANSMIT_OFFSET    6

#define ETH_RX_BD_UNDERRUN_OFFSET      5

#define ETH_RX_BD_NO_CARRIER_OFFSET    4

#define ETH_RX_BD_RETRY_OFFSET         0

#define ETH_RX_BD_RETRY_WIDTH          4

/* Implementatino of Ethernet MAC Registers and State */

struct eth_device

{

  /* Base address in memory */

  unsigned long baseaddr;

  /* Which Ethernet MAC is this? */

  unsigned eth_number;

  /* Which DMA controller is this MAC connected to */

  unsigned dma;

        unsigned tx_channel;

        unsigned rx_channel;

  /* RX and TX file names and handles */

  const char *rxfile, *txfile;

        int txfd;

        int rxfd;

        off_t loopback_offset;

        /* Current TX state */

        struct

        {

                unsigned long bd_index;

                unsigned long bd;

                unsigned working, waiting_for_ack, error;

                unsigned packet_length;

                unsigned minimum_length, maximum_length;

                unsigned crc;

                unsigned bytes_left, bytes_sent;

        } tx;

        /* Current RX state */

        struct

        {

                unsigned long bd_index;

                unsigned long bd;

                int fd;

                off_t *offset;

                unsigned working, error, waiting_for_ack;

                unsigned packet_length, bytes_read, bytes_left;

        } rx;

  /* Visible registers */

  struct

  {

    unsigned long moder;

    unsigned long int_source;

    unsigned long int_mask;

    unsigned long ipgt;

    unsigned long ipgr1;

    unsigned long ipgr2;

    unsigned long packetlen;

    unsigned long collconf;

    unsigned long rx_bd_adr;

    unsigned long controlmoder;

    unsigned long miimoder;

    unsigned long miicommand;

    unsigned long miiaddress;

    unsigned long miitx_data;

    unsigned long miirx_data;

    unsigned long miistatus;

    unsigned long mac_addr0;

    unsigned long mac_addr1;

                /* Buffer descriptors */

                unsigned long bd_ram[ETH_BD_SPACE / 4];

  } regs;

};