94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/*
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* File: fecbd.h
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* Purpose:
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*
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* Purpose: Provide a simple buffer management driver
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*/
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#ifndef _FECBD_H_
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#define _FECBD_H_
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#include "bas_types.h"
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/********************************************************************/
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#define Rx 1
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#define Tx 0
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/*
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* Buffer sizes in bytes
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*/
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#ifndef RX_BUF_SZ
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#define RX_BUF_SZ NBUF_SZ
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#endif
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#ifndef TX_BUF_SZ
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#define TX_BUF_SZ NBUF_SZ
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#endif
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/*
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* Number of Rx and Tx Buffers and Buffer Descriptors
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*/
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#ifndef NRXBD
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#define NRXBD 20
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#endif
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#ifndef NTXBD
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#define NTXBD 20
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#endif
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/*
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* Buffer Descriptor Format
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*/
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typedef struct
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{
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uint16_t status; /* control and status */
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uint16_t length; /* transfer length */
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uint8_t *data; /* buffer address */
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} FECBD;
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/*
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* Bit level definitions for status field of buffer descriptors
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*/
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#define TX_BD_R 0x8000
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#define TX_BD_TO1 0x4000
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#define TX_BD_W 0x2000
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#define TX_BD_TO2 0x1000
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#define TX_BD_INTERRUPT 0x1000 /* MCF547x/8x Only */
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#define TX_BD_L 0x0800
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#define TX_BD_TC 0x0400
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#define TX_BD_DEF 0x0200 /* MCF5272 Only */
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#define TX_BD_ABC 0x0200
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#define TX_BD_HB 0x0100 /* MCF5272 Only */
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#define TX_BD_LC 0x0080 /* MCF5272 Only */
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#define TX_BD_RL 0x0040 /* MCF5272 Only */
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#define TX_BD_UN 0x0002 /* MCF5272 Only */
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#define TX_BD_CSL 0x0001 /* MCF5272 Only */
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#define RX_BD_E 0x8000
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#define RX_BD_R01 0x4000
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#define RX_BD_W 0x2000
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#define RX_BD_R02 0x1000
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#define RX_BD_INTERRUPT 0x1000 /* MCF547x/8x Only */
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#define RX_BD_L 0x0800
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#define RX_BD_M 0x0100
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#define RX_BD_BC 0x0080
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#define RX_BD_MC 0x0040
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#define RX_BD_LG 0x0020
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#define RX_BD_NO 0x0010
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#define RX_BD_CR 0x0004
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#define RX_BD_OV 0x0002
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#define RX_BD_TR 0x0001
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#define RX_BD_ERROR (RX_BD_NO | RX_BD_CR | RX_BD_OV | RX_BD_TR)
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/*
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* Functions provided in fec_bd.c
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*/
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extern void fecbd_init(uint8_t);
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extern uint32_t fecbd_get_start(uint8_t, uint8_t);
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extern FECBD *fecbd_rx_alloc(uint8_t);
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extern FECBD *fecbd_tx_alloc(uint8_t);
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extern FECBD *fecbd_tx_free(uint8_t);
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/*******************************************************************/
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#endif /* _FECBD_H_ */
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