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/*
* Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de>
* See file CREDITS for list of people who contributed to this project.
*
* This file is part of barebox.
*
* barebox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* barebox is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with barebox. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file
* 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 NBUF_SZ
#endif
#ifndef TX_BUF_SZ
#define TX_BUF_SZ NBUF_SZ
#endif
/*
* Number of Rx and Tx Buffers and Buffer Descriptors
*/
#ifndef NRXBD
#define NRXBD 10
#endif
#ifndef NTXBD
#define NTXBD 4
#endif
/*
* Buffer Descriptor Format
*/
typedef struct
{
uint16_t status; /* control and status */
uint16_t length; /* transfer length */
uint8_t *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)
/*
* Functions provided in fec_bd.c
*/
void
fecbd_init(uint8_t);
uint32_t
fecbd_get_start(uint8_t, uint8_t);
FECBD *
fecbd_rx_alloc(uint8_t);
FECBD *
fecbd_tx_alloc(uint8_t);
FECBD *
fecbd_tx_free(uint8_t);
#endif /* _FECBD_H_ */
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