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175 lines
4.1 KiB
175 lines
4.1 KiB
/* r3964 linediscipline for linux |
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* |
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* ----------------------------------------------------------- |
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* Copyright by |
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* Philips Automation Projects |
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* Kassel (Germany) |
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* ----------------------------------------------------------- |
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* This software may be used and distributed according to the terms of |
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* the GNU General Public License, incorporated herein by reference. |
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* |
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* Author: |
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* L. Haag |
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* |
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* $Log: r3964.h,v $ |
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* Revision 1.4 2005/12/21 19:54:24 Kurt Huwig <kurt huwig de> |
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* Fixed HZ usage on 2.6 kernels |
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* Removed unnecessary include |
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* |
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* Revision 1.3 2001/03/18 13:02:24 dwmw2 |
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* Fix timer usage, use spinlocks properly. |
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* |
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* Revision 1.2 2001/03/18 12:53:15 dwmw2 |
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* Merge changes in 2.4.2 |
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* |
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* Revision 1.1.1.1 1998/10/13 16:43:14 dwmw2 |
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* This'll screw the version control |
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* |
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* Revision 1.6 1998/09/30 00:40:38 dwmw2 |
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* Updated to use kernel's N_R3964 if available |
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* |
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* Revision 1.4 1998/04/02 20:29:44 lhaag |
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* select, blocking, ... |
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* |
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* Revision 1.3 1998/02/12 18:58:43 root |
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* fixed some memory leaks |
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* calculation of checksum characters |
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* |
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* Revision 1.2 1998/02/07 13:03:17 root |
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* ioctl read_telegram |
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* |
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* Revision 1.1 1998/02/06 19:19:43 root |
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* Initial revision |
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* |
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* |
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*/ |
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#ifndef __LINUX_N_R3964_H__ |
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#define __LINUX_N_R3964_H__ |
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#include <linux/param.h> |
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#include <uapi/linux/n_r3964.h> |
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/* |
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* Common ascii handshake characters: |
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*/ |
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#define STX 0x02 |
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#define ETX 0x03 |
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#define DLE 0x10 |
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#define NAK 0x15 |
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/* |
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* Timeouts (from milliseconds to jiffies) |
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*/ |
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#define R3964_TO_QVZ ((550)*HZ/1000) |
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#define R3964_TO_ZVZ ((220)*HZ/1000) |
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#define R3964_TO_NO_BUF ((400)*HZ/1000) |
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#define R3964_NO_TX_ROOM ((100)*HZ/1000) |
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#define R3964_TO_RX_PANIC ((4000)*HZ/1000) |
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#define R3964_MAX_RETRIES 5 |
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enum { R3964_IDLE, |
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R3964_TX_REQUEST, R3964_TRANSMITTING, |
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R3964_WAIT_ZVZ_BEFORE_TX_RETRY, R3964_WAIT_FOR_TX_ACK, |
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R3964_WAIT_FOR_RX_BUF, |
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R3964_RECEIVING, R3964_WAIT_FOR_BCC, R3964_WAIT_FOR_RX_REPEAT |
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}; |
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/* |
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* All open file-handles are 'clients' and are stored in a linked list: |
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*/ |
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struct r3964_message; |
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struct r3964_client_info { |
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spinlock_t lock; |
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struct pid *pid; |
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unsigned int sig_flags; |
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struct r3964_client_info *next; |
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struct r3964_message *first_msg; |
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struct r3964_message *last_msg; |
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struct r3964_block_header *next_block_to_read; |
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int msg_count; |
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}; |
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struct r3964_block_header; |
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/* internal version of client_message: */ |
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struct r3964_message { |
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int msg_id; |
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int arg; |
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int error_code; |
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struct r3964_block_header *block; |
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struct r3964_message *next; |
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}; |
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/* |
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* Header of received block in rx_buf/tx_buf: |
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*/ |
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struct r3964_block_header |
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{ |
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unsigned int length; /* length in chars without header */ |
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unsigned char *data; /* usually data is located |
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immediately behind this struct */ |
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unsigned int locks; /* only used in rx_buffer */ |
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struct r3964_block_header *next; |
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struct r3964_client_info *owner; /* =NULL in rx_buffer */ |
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}; |
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/* |
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* If rx_buf hasn't enough space to store R3964_MTU chars, |
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* we will reject all incoming STX-requests by sending NAK. |
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*/ |
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#define RX_BUF_SIZE 4000 |
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#define TX_BUF_SIZE 4000 |
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#define R3964_MAX_BLOCKS_IN_RX_QUEUE 100 |
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#define R3964_PARITY 0x0001 |
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#define R3964_FRAME 0x0002 |
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#define R3964_OVERRUN 0x0004 |
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#define R3964_UNKNOWN 0x0008 |
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#define R3964_BREAK 0x0010 |
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#define R3964_CHECKSUM 0x0020 |
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#define R3964_ERROR 0x003f |
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#define R3964_BCC 0x4000 |
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#define R3964_DEBUG 0x8000 |
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struct r3964_info { |
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spinlock_t lock; |
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struct tty_struct *tty; |
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unsigned char priority; |
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unsigned char *rx_buf; /* ring buffer */ |
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unsigned char *tx_buf; |
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struct r3964_block_header *rx_first; |
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struct r3964_block_header *rx_last; |
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struct r3964_block_header *tx_first; |
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struct r3964_block_header *tx_last; |
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unsigned int tx_position; |
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unsigned int rx_position; |
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unsigned char last_rx; |
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unsigned char bcc; |
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unsigned int blocks_in_rx_queue; |
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struct mutex read_lock; /* serialize r3964_read */ |
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struct r3964_client_info *firstClient; |
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unsigned int state; |
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unsigned int flags; |
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struct timer_list tmr; |
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int nRetry; |
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}; |
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#endif
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