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/* enc28j60.h: SpeccyBoot Ethernet emulation
Emulates SPI communication and (a minimal subset of) the
functionality of the Microchip ENC28J60 Ethernet controller. Refer
to the ENC28J60 data sheet for details.
ENC28J60 data sheet:
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en022889
Copyright (c) 2009-2010 Patrik Persson, Philip Kendall
$Id: enc28j60.h 4775 2012-11-26 23:03:36Z sbaldovi $
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#ifndef FUSE_ENC28J60_H
#define FUSE_ENC28J60_H
typedef enum nic_enc28j60_spi_state {
SPI_IDLE = -2,
SPI_CMD = -1, /* expect a command byte */
SPI_RCR = 0, /* read command register */
SPI_RBM = 1, /* read buffer memory */
SPI_WCR = 2, /* write command register */
SPI_WBM = 3, /* write buffer memory */
SPI_BFS = 4, /* bit-field set */
SPI_BFC = 5, /* bit-field clear */
SPI_SRC = 7 /* system reset command */
} nic_enc28j60_spi_state;
typedef struct nic_enc28j60_t nic_enc28j60_t;
nic_enc28j60_t* nic_enc28j60_alloc( void );
void nic_enc28j60_init( nic_enc28j60_t *self );
void nic_enc28j60_free( nic_enc28j60_t *self );
void nic_enc28j60_set_tap_fd( nic_enc28j60_t *self, int tap_fd );
void nic_enc28j60_poll( nic_enc28j60_t *self );
void nic_enc28j60_reset( nic_enc28j60_t *self );
void nic_enc28j60_set_spi_state( nic_enc28j60_t *self, nic_enc28j60_spi_state new_state );
int nic_enc28j60_spi_produce_bit( nic_enc28j60_t *self );
void nic_enc28j60_spi_consume_bit( nic_enc28j60_t *self, int bit );
#endif /* #ifndef FUSE_ENC28J60_H */
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