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 127