drivers/net/ep93xx_eth.h

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