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 */ 40 struct rx_descriptor { 41 uint32_t word1; 42 uint32_t word2; 43 }; 44 45 /** 46 * Receive status queue entry 47 */ 48 struct 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 */ 60 struct 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 */ 70 struct 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 */ 80 struct 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 */ 89 struct 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 */ 98 struct 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 */ 107 struct 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 */ 116 struct 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