Initial import

1 files changed, 177 insertions, 0 deletions

diff --git a/include/linux/n_r3964.h b/include/linux/n_r3964.h
new file mode 100644
index 000000000..5d0b2a1de
--- /dev/null
+++ b/include/linux/n_r3964.h
@@ -0,0 +1,177 @@
+/* r3964 linediscipline for linux
+ *
+ * -----------------------------------------------------------
+ * Copyright by
+ * Philips Automation Projects
+ * Kassel (Germany)
+ * -----------------------------------------------------------
+ * 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 1.4  2005/12/21 19:54:24  Kurt Huwig <kurt huwig de>
+ * Fixed HZ usage on 2.6 kernels
+ * Removed unnecessary include
+ *
+ * Revision 1.3  2001/03/18 13:02:24  dwmw2
+ * Fix timer usage, use spinlocks properly.
+ *
+ * Revision 1.2  2001/03/18 12:53:15  dwmw2
+ * Merge changes in 2.4.2
+ *
+ * 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__
+
+
+#include <linux/param.h>
+#include <uapi/linux/n_r3964.h>
+
+/*
+ * Common ascii handshake characters:
+ */
+
+#define STX 0x02
+#define ETX 0x03
+#define DLE 0x10
+#define NAK 0x15
+
+/*
+ * Timeouts (from milliseconds to jiffies)
+ */
+
+#define R3964_TO_QVZ ((550)*HZ/1000)
+#define R3964_TO_ZVZ ((220)*HZ/1000)
+#define R3964_TO_NO_BUF ((400)*HZ/1000)
+#define R3964_NO_TX_ROOM ((100)*HZ/1000)
+#define R3964_TO_RX_PANIC ((4000)*HZ/1000)
+#define R3964_MAX_RETRIES 5
+
+
+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 {
+	spinlock_t     lock;
+	struct pid    *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;
+};
+
+
+
+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 
+                                        immediately 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 {
+	spinlock_t     lock;
+	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;
+
+	struct timer_list tmr;
+	int nRetry;
+};
+
+#endif