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/*
* File: fecbd.h
* Purpose:
*
* Purpose: Provide a simple buffer management driver
*/
#ifndef _FECBD_H_
#define _FECBD_H_
/********************************************************************/
#define Rx 1
#define Tx 0
/*
* Buffer sizes in bytes
*/
#ifndef RX_BUF_SZ
#define RX_BUF_SZ 1520 //2048
#endif
#ifndef TX_BUF_SZ
#define TX_BUF_SZ 1520
#endif
/*
* Buffer Descriptor Format
*/
#pragma options align= packed
typedef struct
{
uint16 status; /* control and status */
uint16 length; /* transfer length */
uint8 *data; /* buffer address */
} FECBD;
/*
* Bit level definitions for status field of buffer descriptors
*/
#define TX_BD_R 0x8000
#define TX_BD_TO1 0x4000
#define TX_BD_W 0x2000
#define TX_BD_TO2 0x1000
#define TX_BD_INTERRUPT 0x1000 /* MCF547x/8x Only */
#define TX_BD_L 0x0800
#define TX_BD_TC 0x0400
#define TX_BD_DEF 0x0200 /* MCF5272 Only */
#define TX_BD_ABC 0x0200
#define TX_BD_HB 0x0100 /* MCF5272 Only */
#define TX_BD_LC 0x0080 /* MCF5272 Only */
#define TX_BD_RL 0x0040 /* MCF5272 Only */
#define TX_BD_UN 0x0002 /* MCF5272 Only */
#define TX_BD_CSL 0x0001 /* MCF5272 Only */
#define RX_BD_E 0x8000
#define RX_BD_R01 0x4000
#define RX_BD_W 0x2000
#define RX_BD_R02 0x1000
#define RX_BD_INTERRUPT 0x1000 /* MCF547x/8x Only */
#define RX_BD_L 0x0800
#define RX_BD_M 0x0100
#define RX_BD_BC 0x0080
#define RX_BD_MC 0x0040
#define RX_BD_LG 0x0020
#define RX_BD_NO 0x0010
#define RX_BD_CR 0x0004
#define RX_BD_OV 0x0002
#define RX_BD_TR 0x0001
#define RX_BD_ERROR (RX_BD_NO | RX_BD_CR | RX_BD_OV | RX_BD_TR)
/*
* The following defines are provided by the MCF547x/8x
* DMA API. These are shown here to show their correlation
* to the other FEC buffer descriptor status bits
*
* #define MCD_FEC_BUF_READY 0x8000
* #define MCD_FEC_WRAP 0x2000
* #define MCD_FEC_INTERRUPT 0x1000
* #define MCD_FEC_END_FRAME 0x0800
*/
/*
* Functions provided in fec_bd.c
*/
int fecbd_init(int, int, int);
void fecbd_flush(int);
void fecbd_dump( void );
uint32 fecbd_get_start(int, int);
FECBD* fecbd_rx_alloc(int);
FECBD* fecbd_tx_alloc(int);
FECBD* fecbd_tx_free(int);
/*
* Error codes
*/
#define ERR_MALLOC (-1)
#define ERR_NBUFALLOC (-2)
/*******************************************************************/
#endif /* _FECBD_H_ */
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