LXR uboot/drivers/net/ep93xx

   1/*
   2 * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
   3 *
   4 * Copyright (C) 2004, 2005
   5 * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
   6 *
   7 * SPDX-License-Identifier:     GPL-2.0+
   8 */
   9
  10#ifndef _EP93XX_ETH_H
  11#define _EP93XX_ETH_H
  12
  13#include <net.h>
  14
  15/**
  16 * #define this to dump device status and queue info during initialization and
  17 * following errors.
  18 */
  19#undef EP93XX_MAC_DEBUG
  20
  21/**
  22 * Number of descriptor and status entries in our RX queues.
  23 * It must be power of 2 !
  24 */
  25#define NUMRXDESC               PKTBUFSRX
  26
  27/**
  28 * Number of descriptor and status entries in our TX queues.
  29 */
  30#define NUMTXDESC               1
  31
  32/**
  33 * 944 = (1024 - 64) - 16, Fifo size - Minframesize - 16 (Chip FACT)
  34 */
  35#define TXSTARTMAX              944
  36
  37/**
  38 * Receive descriptor queue entry
  39 */
  40struct rx_descriptor {
  41        uint32_t word1;
  42        uint32_t word2;
  43};
  44
  45/**
  46 * Receive status queue entry
  47 */
  48struct rx_status {
  49        uint32_t word1;
  50        uint32_t word2;
  51};
  52
  53#define RX_STATUS_RWE(rx_status) ((rx_status->word1 >> 30) & 0x01)
  54#define RX_STATUS_RFP(rx_status) ((rx_status->word1 >> 31) & 0x01)
  55#define RX_STATUS_FRAME_LEN(rx_status) (rx_status->word2 & 0xFFFF)
  56
  57/**
  58 * Transmit descriptor queue entry
  59 */
  60struct tx_descriptor {
  61        uint32_t word1;
  62        uint32_t word2;
  63};
  64
  65#define TX_DESC_EOF (1 << 31)
  66
  67/**
  68 * Transmit status queue entry
  69 */
  70struct tx_status {
  71        uint32_t word1;
  72};
  73
  74#define TX_STATUS_TXWE(tx_status) (((tx_status)->word1 >> 30) & 0x01)
  75#define TX_STATUS_TXFP(tx_status) (((tx_status)->word1 >> 31) & 0x01)
  76
  77/**
  78 * Transmit descriptor queue
  79 */
  80struct tx_descriptor_queue {
  81        struct tx_descriptor *base;
  82        struct tx_descriptor *current;
  83        struct tx_descriptor *end;
  84};
  85
  86/**
  87 * Transmit status queue
  88 */
  89struct tx_status_queue {
  90        struct tx_status *base;
  91        volatile struct tx_status *current;
  92        struct tx_status *end;
  93};
  94
  95/**
  96 * Receive descriptor queue
  97 */
  98struct rx_descriptor_queue {
  99        struct rx_descriptor *base;
 100        struct rx_descriptor *current;
 101        struct rx_descriptor *end;
 102};
 103
 104/**
 105 * Receive status queue
 106 */
 107struct rx_status_queue {
 108        struct rx_status *base;
 109        volatile struct rx_status *current;
 110        struct rx_status *end;
 111};
 112
 113/**
 114 * EP93xx MAC private data structure
 115 */
 116struct ep93xx_priv {
 117        struct rx_descriptor_queue      rx_dq;
 118        struct rx_status_queue          rx_sq;
 119        void                            *rx_buffer[NUMRXDESC];
 120
 121        struct tx_descriptor_queue      tx_dq;
 122        struct tx_status_queue          tx_sq;
 123
 124        struct mac_regs                 *regs;
 125};
 126
 127#endif
 128