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102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
16 years ago
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/*
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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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/********************************************************************/
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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 1520 //2048
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#endif
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#ifndef TX_BUF_SZ
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#define TX_BUF_SZ 1520
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#endif
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/*
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* Buffer Descriptor Format
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*/
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#pragma options align= packed
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typedef struct
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{
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16 years ago
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unsigned short status; /* control and status */
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unsigned short length; /* transfer length */
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unsigned char *data; /* buffer address */
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16 years ago
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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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* The following defines are provided by the MCF547x/8x
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* DMA API. These are shown here to show their correlation
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* to the other FEC buffer descriptor status bits
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*
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* #define MCD_FEC_BUF_READY 0x8000
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* #define MCD_FEC_WRAP 0x2000
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* #define MCD_FEC_INTERRUPT 0x1000
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* #define MCD_FEC_END_FRAME 0x0800
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*/
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/*
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* Functions provided in fec_bd.c
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*/
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int fecbd_init(int, int, int);
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void fecbd_flush(int);
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void fecbd_dump( void );
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16 years ago
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unsigned long fecbd_get_start(int, int);
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16 years ago
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FECBD* fecbd_rx_alloc(int);
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FECBD* fecbd_tx_alloc(int);
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FECBD* fecbd_tx_free(int);
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/*
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* Error codes
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*/
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#define ERR_MALLOC (-1)
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#define ERR_NBUFALLOC (-2)
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/*******************************************************************/
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#endif /* _FECBD_H_ */
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