From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- include/linux/n_r3964.h | 177 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 include/linux/n_r3964.h (limited to 'include/linux/n_r3964.h') 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 + * 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 +#include + +/* + * 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 -- cgit v1.2.3-54-g00ecf