1 /* r3964 linediscipline for linux
3 * -----------------------------------------------------------
5 * Philips Automation Projects
7 * http://www.pap-philips.de
8 * -----------------------------------------------------------
9 * This software may be used and distributed according to the terms of
10 * the GNU General Public License, incorporated herein by reference.
16 * Revision 1.1.1.1 2006/04/12 06:25:58 michaelc
17 * Original Broadcom V3.06.02V release
19 * Revision 1.3 2001/03/18 13:02:24 dwmw2
20 * Fix timer usage, use spinlocks properly.
22 * Revision 1.2 2001/03/18 12:53:15 dwmw2
23 * Merge changes in 2.4.2
25 * Revision 1.1.1.1 1998/10/13 16:43:14 dwmw2
26 * This'll screw the version control
28 * Revision 1.6 1998/09/30 00:40:38 dwmw2
29 * Updated to use kernel's N_R3964 if available
31 * Revision 1.4 1998/04/02 20:29:44 lhaag
32 * select, blocking, ...
34 * Revision 1.3 1998/02/12 18:58:43 root
35 * fixed some memory leaks
36 * calculation of checksum characters
38 * Revision 1.2 1998/02/07 13:03:17 root
41 * Revision 1.1 1998/02/06 19:19:43 root
47 #ifndef __LINUX_N_R3964_H__
48 #define __LINUX_N_R3964_H__
50 /* line disciplines for r3964 protocol */
51 #include <asm/termios.h>
55 * Common ascii handshake characters:
64 * Timeouts (msecs/10 msecs per timer interrupt):
67 #define R3964_TO_QVZ 550/10
68 #define R3964_TO_ZVZ 220/10
69 #define R3964_TO_NO_BUF 400/10
70 #define R3964_NO_TX_ROOM 100/10
71 #define R3964_TO_RX_PANIC 4000/10
72 #define R3964_MAX_RETRIES 5
80 #define R3964_ENABLE_SIGNALS 0x5301
81 #define R3964_SETPRIORITY 0x5302
82 #define R3964_USE_BCC 0x5303
83 #define R3964_READ_TELEGRAM 0x5304
85 /* Options for R3964_SETPRIORITY */
86 #define R3964_MASTER 0
89 /* Options for R3964_ENABLE_SIGNALS */
90 #define R3964_SIG_ACK 0x0001
91 #define R3964_SIG_DATA 0x0002
92 #define R3964_SIG_ALL 0x000f
93 #define R3964_SIG_NONE 0x0000
94 #define R3964_USE_SIGIO 0x1000
97 * r3964 operation states:
102 R3964_TX_REQUEST, R3964_TRANSMITTING,
103 R3964_WAIT_ZVZ_BEFORE_TX_RETRY, R3964_WAIT_FOR_TX_ACK,
104 R3964_WAIT_FOR_RX_BUF,
105 R3964_RECEIVING, R3964_WAIT_FOR_BCC, R3964_WAIT_FOR_RX_REPEAT
109 * All open file-handles are 'clients' and are stored in a linked list:
112 struct r3964_message;
114 struct r3964_client_info {
117 unsigned int sig_flags;
119 struct r3964_client_info *next;
121 struct r3964_message *first_msg;
122 struct r3964_message *last_msg;
123 struct r3964_block_header *next_block_to_read;
130 /* types for msg_id: */
131 enum {R3964_MSG_ACK=1, R3964_MSG_DATA };
133 #define R3964_MAX_MSG_COUNT 32
135 /* error codes for client messages */
136 #define R3964_OK 0 /* no error. */
137 #define R3964_TX_FAIL -1 /* transmission error, block NOT sent */
138 #define R3964_OVERFLOW -2 /* msg queue overflow */
140 /* the client gets this struct when calling read(fd,...): */
141 struct r3964_client_message {
147 #define R3964_MTU 256
152 struct r3964_block_header;
154 /* internal version of client_message: */
155 struct r3964_message {
159 struct r3964_block_header *block;
160 struct r3964_message *next;
164 * Header of received block in rx_buf/tx_buf:
167 struct r3964_block_header
169 unsigned int length; /* length in chars without header */
170 unsigned char *data; /* usually data is located
171 immediately behind this struct */
172 unsigned int locks; /* only used in rx_buffer */
174 struct r3964_block_header *next;
175 struct r3964_client_info *owner; /* =NULL in rx_buffer */
179 * If rx_buf hasn't enough space to store R3964_MTU chars,
180 * we will reject all incoming STX-requests by sending NAK.
183 #define RX_BUF_SIZE 4000
184 #define TX_BUF_SIZE 4000
185 #define R3964_MAX_BLOCKS_IN_RX_QUEUE 100
187 #define R3964_PARITY 0x0001
188 #define R3964_FRAME 0x0002
189 #define R3964_OVERRUN 0x0004
190 #define R3964_UNKNOWN 0x0008
191 #define R3964_BREAK 0x0010
192 #define R3964_CHECKSUM 0x0020
193 #define R3964_ERROR 0x003f
194 #define R3964_BCC 0x4000
195 #define R3964_DEBUG 0x8000
200 struct tty_struct *tty;
201 unsigned char priority;
202 unsigned char *rx_buf; /* ring buffer */
203 unsigned char *tx_buf;
205 wait_queue_head_t read_wait;
206 //struct wait_queue *read_wait;
208 struct r3964_block_header *rx_first;
209 struct r3964_block_header *rx_last;
210 struct r3964_block_header *tx_first;
211 struct r3964_block_header *tx_last;
212 unsigned int tx_position;
213 unsigned int rx_position;
214 unsigned char last_rx;
216 unsigned int blocks_in_rx_queue;
219 struct r3964_client_info *firstClient;
223 struct timer_list tmr;