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/* w5100.c: Wiznet W5100 emulation - internal routines
Emulates a minimal subset of the Wiznet W5100 TCP/IP controller.
Copyright (c) 2011 Philip Kendall
$Id: w5100_internals.h 4912 2013-03-24 19:34:06Z 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_W5100_INTERNALS_H
#define FUSE_W5100_INTERNALS_H
#include <signal.h>
typedef enum w5100_socket_mode {
W5100_SOCKET_MODE_CLOSED = 0x00,
W5100_SOCKET_MODE_TCP,
W5100_SOCKET_MODE_UDP,
W5100_SOCKET_MODE_IPRAW,
W5100_SOCKET_MODE_MACRAW,
W5100_SOCKET_MODE_PPPOE,
} w5100_socket_mode;
typedef enum w5100_socket_state {
W5100_SOCKET_STATE_CLOSED = 0x00,
W5100_SOCKET_STATE_INIT = 0x13,
W5100_SOCKET_STATE_LISTEN,
W5100_SOCKET_STATE_ESTABLISHED = 0x17,
W5100_SOCKET_STATE_CLOSE_WAIT = 0x1c,
W5100_SOCKET_STATE_UDP = 0x22,
} w5100_socket_state;
enum w5100_socket_registers {
W5100_SOCKET_MR = 0x00,
W5100_SOCKET_CR,
W5100_SOCKET_IR,
W5100_SOCKET_SR,
W5100_SOCKET_PORT0,
W5100_SOCKET_PORT1,
W5100_SOCKET_DIPR0 = 0x0c,
W5100_SOCKET_DIPR1,
W5100_SOCKET_DIPR2,
W5100_SOCKET_DIPR3,
W5100_SOCKET_DPORT0,
W5100_SOCKET_DPORT1,
W5100_SOCKET_TX_FSR0 = 0x20,
W5100_SOCKET_TX_FSR1,
W5100_SOCKET_TX_RR0,
W5100_SOCKET_TX_RR1,
W5100_SOCKET_TX_WR0,
W5100_SOCKET_TX_WR1,
W5100_SOCKET_RX_RSR0,
W5100_SOCKET_RX_RSR1,
W5100_SOCKET_RX_RD0,
W5100_SOCKET_RX_RD1,
};
typedef struct nic_w5100_socket_t {
int id; /* For debug use only */
/* W5100 properties */
w5100_socket_mode mode;
libspectrum_byte flags;
w5100_socket_state state;
libspectrum_byte ir; /* Interrupt register */
libspectrum_byte port[2]; /* Source port */
libspectrum_byte dip[4]; /* Destination IP address */
libspectrum_byte dport[2];/* Destination port */
libspectrum_word tx_rr; /* Transmit read pointer */
libspectrum_word tx_wr; /* Transmit write pointer */
libspectrum_word rx_rsr; /* Received size */
libspectrum_word rx_rd; /* Received read pointer */
libspectrum_word old_rx_rd; /* Used in RECV command processing */
libspectrum_byte tx_buffer[0x800]; /* Transmit buffer */
libspectrum_byte rx_buffer[0x800]; /* Received buffer */
/* Host properties */
compat_socket_t fd; /* Socket file descriptor */
int bind_count; /* Number of writes to the Sn_PORTx registers we've received */
int socket_bound; /* True once we've bound the socket to a port */
int write_pending; /* True if we're waiting to write data on this socket */
int last_send; /* The value of Sn_TX_WR when the SEND command was last sent */
int datagram_lengths[0x20]; /* The lengths of datagrams to be sent */
int datagram_count;
/* Flag used to indicate that a socket has been closed since we started
waiting for it in a select() call and therefore the socket should no
longer be used */
int ok_for_io;
pthread_mutex_t lock; /* Mutex for this socket */
} nic_w5100_socket_t;
struct nic_w5100_t {
libspectrum_byte gw[4]; /* Gateway IP address */
libspectrum_byte sub[4]; /* Our subnet mask */
libspectrum_byte sha[6]; /* MAC address */
libspectrum_byte sip[4]; /* Our IP address */
nic_w5100_socket_t socket[4];
pthread_t thread; /* Thread for doing I/O */
sig_atomic_t stop_io_thread; /* Flag to stop I/O thread */
compat_socket_selfpipe_t *selfpipe; /* Device for waking I/O thread */
};
void nic_w5100_socket_init( nic_w5100_socket_t *socket, int which );
void nic_w5100_socket_end( nic_w5100_socket_t *socket );
void nic_w5100_socket_reset( nic_w5100_socket_t *socket );
libspectrum_byte nic_w5100_socket_read( nic_w5100_t *self, libspectrum_word reg );
void nic_w5100_socket_write( nic_w5100_t *self, libspectrum_word reg, libspectrum_byte b );
libspectrum_byte nic_w5100_socket_read_rx_buffer( nic_w5100_t *self, libspectrum_word reg );
void nic_w5100_socket_write_tx_buffer( nic_w5100_t *self, libspectrum_word reg, libspectrum_byte b );
void nic_w5100_socket_add_to_sets( nic_w5100_socket_t *socket, fd_set *readfds,
fd_set *writefds, int *max_fd );
void nic_w5100_socket_process_io( nic_w5100_socket_t *socket, fd_set readfds,
fd_set writefds );
/* Debug routines */
/* Define this to spew debugging info to stdout */
#define W5100_DEBUG 0
void nic_w5100_debug( const char *format, ... );
void nic_w5100_vdebug( const char *format, va_list ap );
void nic_w5100_error( int severity, const char *format, ... );
#endif /* #ifndef FUSE_W5100_H */
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