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usr
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src
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kernels
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3.10.0-1160.119.1.el7.tuxcare.els21.x86_64
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include
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linux
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Filename :
n_r3964.h
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/* 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; 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 mutex read_lock; /* serialize r3964_read */ struct r3964_client_info *firstClient; unsigned int state; unsigned int flags; struct timer_list tmr; int nRetry; }; #endif