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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | /* 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 |