Subversion Repositories openrisc_2011-10-31

/*

 * 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

{

    unsigned short status;  /* control and status */

    unsigned short length;  /* transfer length */

    unsigned char  *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 );

unsigned long  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_ */