patch-2.3.16 linux/include/linux/n_r3964.h

• Lines: 222
• Date: Mon Aug 30 18:05:19 1999
• Orig file: v2.3.15/linux/include/linux/n_r3964.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.15/linux/include/linux/n_r3964.h linux/include/linux/n_r3964.h
@@ -0,0 +1,221 @@
+/* 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 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