n_r3964.h
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- /* r3964 linediscipline for linux
- *
- * -----------------------------------------------------------
- * Copyright by
- * Philips Automation Projects
- * Kassel (Germany)
- * http://www.pap-philips.de
- * -----------------------------------------------------------
- * This software may be used and distributed according to the terms of
- * the GNU General Public License, incorporated herein by reference.
- *
- * Author:
- * L. Haag
- *
- * $Log: r3964.h,v $
- * Revision 1.1.1.1 1998/10/13 16:43:14 dwmw2
- * This'll screw the version control
- *
- * Revision 1.6 1998/09/30 00:40:38 dwmw2
- * Updated to use kernel's N_R3964 if available
- *
- * Revision 1.4 1998/04/02 20:29:44 lhaag
- * select, blocking, ...
- *
- * Revision 1.3 1998/02/12 18:58:43 root
- * fixed some memory leaks
- * calculation of checksum characters
- *
- * Revision 1.2 1998/02/07 13:03:17 root
- * ioctl read_telegram
- *
- * Revision 1.1 1998/02/06 19:19:43 root
- * Initial revision
- *
- *
- */
- #ifndef __LINUX_N_R3964_H__
- #define __LINUX_N_R3964_H__
- /* line disciplines for r3964 protocol */
- #include <asm/termios.h>
- #ifdef __KERNEL__
- /*
- * Common ascii handshake characters:
- */
- #define STX 0x02
- #define ETX 0x03
- #define DLE 0x10
- #define NAK 0x15
- /*
- * Timeouts (msecs/10 msecs per timer interrupt):
- */
- #define R3964_TO_QVZ 550/10
- #define R3964_TO_ZVZ 220/10
- #define R3964_TO_NO_BUF 400/10
- #define R3964_NO_TX_ROOM 100/10
- #define R3964_TO_RX_PANIC 4000/10
- #define R3964_MAX_RETRIES 5
- #endif
- /*
- * Ioctl-commands
- */
- #define R3964_ENABLE_SIGNALS 0x5301
- #define R3964_SETPRIORITY 0x5302
- #define R3964_USE_BCC 0x5303
- #define R3964_READ_TELEGRAM 0x5304
- /* Options for R3964_SETPRIORITY */
- #define R3964_MASTER 0
- #define R3964_SLAVE 1
- /* Options for R3964_ENABLE_SIGNALS */
- #define R3964_SIG_ACK 0x0001
- #define R3964_SIG_DATA 0x0002
- #define R3964_SIG_ALL 0x000f
- #define R3964_SIG_NONE 0x0000
- #define R3964_USE_SIGIO 0x1000
- /*
- * r3964 operation states:
- */
- #ifdef __KERNEL__
- enum { R3964_IDLE,
- R3964_TX_REQUEST, R3964_TRANSMITTING,
- R3964_WAIT_ZVZ_BEFORE_TX_RETRY, R3964_WAIT_FOR_TX_ACK,
- R3964_WAIT_FOR_RX_BUF,
- R3964_RECEIVING, R3964_WAIT_FOR_BCC, R3964_WAIT_FOR_RX_REPEAT
- };
- /*
- * All open file-handles are 'clients' and are stored in a linked list:
- */
- struct r3964_message;
- struct r3964_client_info {
- pid_t pid;
- unsigned int sig_flags;
- struct r3964_client_info *next;
- struct r3964_message *first_msg;
- struct r3964_message *last_msg;
- struct r3964_block_header *next_block_to_read;
- int msg_count;
- };
- #endif
- /* types for msg_id: */
- enum {R3964_MSG_ACK=1, R3964_MSG_DATA };
- #define R3964_MAX_MSG_COUNT 32
- /* error codes for client messages */
- #define R3964_OK 0 /* no error. */
- #define R3964_TX_FAIL -1 /* transmission error, block NOT sent */
- #define R3964_OVERFLOW -2 /* msg queue overflow */
- /* the client gets this struct when calling read(fd,...): */
- struct r3964_client_message {
- int msg_id;
- int arg;
- int error_code;
- };
- #define R3964_MTU 256
- #ifdef __KERNEL__
- struct r3964_block_header;
- /* internal version of client_message: */
- struct r3964_message {
- int msg_id;
- int arg;
- int error_code;
- struct r3964_block_header *block;
- struct r3964_message *next;
- };
- /*
- * Header of received block in rx_buf/tx_buf:
- */
- struct r3964_block_header
- {
- unsigned int length; /* length in chars without header */
- unsigned char *data; /* usually data is located
- immediatly behind this struct */
- unsigned int locks; /* only used in rx_buffer */
-
- struct r3964_block_header *next;
- struct r3964_client_info *owner; /* =NULL in rx_buffer */
- };
- /*
- * If rx_buf hasn't enough space to store R3964_MTU chars,
- * we will reject all incoming STX-requests by sending NAK.
- */
- #define RX_BUF_SIZE 4000
- #define TX_BUF_SIZE 4000
- #define R3964_MAX_BLOCKS_IN_RX_QUEUE 100
- #define R3964_PARITY 0x0001
- #define R3964_FRAME 0x0002
- #define R3964_OVERRUN 0x0004
- #define R3964_UNKNOWN 0x0008
- #define R3964_BREAK 0x0010
- #define R3964_CHECKSUM 0x0020
- #define R3964_ERROR 0x003f
- #define R3964_BCC 0x4000
- #define R3964_DEBUG 0x8000
- struct r3964_info {
- struct tty_struct *tty;
- unsigned char priority;
- unsigned char *rx_buf; /* ring buffer */
- unsigned char *tx_buf;
- wait_queue_head_t read_wait;
- //struct wait_queue *read_wait;
- struct r3964_block_header *rx_first;
- struct r3964_block_header *rx_last;
- struct r3964_block_header *tx_first;
- struct r3964_block_header *tx_last;
- unsigned int tx_position;
- unsigned int rx_position;
- unsigned char last_rx;
- unsigned char bcc;
- unsigned int blocks_in_rx_queue;
-
-
- struct r3964_client_info *firstClient;
- unsigned int state;
- unsigned int flags;
- int count_down;
- int nRetry;
- struct tq_struct bh_1;
- struct tq_struct bh_2;
- };
- #endif
- #endif