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Diffstat (limited to 'include/linux/n_r3964.h')
| -rw-r--r-- | include/linux/n_r3964.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/include/linux/n_r3964.h b/include/linux/n_r3964.h new file mode 100644 index 00000000..54b8e0d8 --- /dev/null +++ b/include/linux/n_r3964.h @@ -0,0 +1,231 @@ +/* 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__ + +/* line disciplines for r3964 protocol */ + +#ifdef __KERNEL__ + +#include <linux/param.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 + +#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 { + 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; +}; + + +#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 + 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 + +#endif |