Userspace LIN master: Provide state encapsulation to test kernel code.

[linux-lin.git] / misc / tty_lin_master / lin_common.h

diff --git a/misc/tty_lin_master/lin_common.h b/misc/tty_lin_master/lin_common.h
new file mode 100644 (file)
index 0000000..74cbe71
--- /dev/null
+++ b/misc/tty_lin_master/lin_common.h
@@ -0,0 +1,59 @@
+#ifndef _LIN_COMMON_H
+#define _LIN_COMMON_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* maximum buffer len to store whole LIN message*/
+#define SLLIN_DATA_MAX  8
+#define SLLIN_BUFF_LEN (1 /*break*/ + 1 /*sync*/ + 1 /*ID*/ + \
+                         SLLIN_DATA_MAX + 1 /*checksum*/)
+#define SLLIN_BUFF_BREAK 0
+#define SLLIN_BUFF_SYNC         1
+#define SLLIN_BUFF_ID   2
+#define SLLIN_BUFF_DATA         3
+
+extern const unsigned char sllin_id_parity_table[64];
+
+struct sllin_tty;
+
+struct sllin {
+       /* Various fields. */
+       struct sllin_tty        *tty;           /* ptr to TTY structure      */
+
+       /* LIN message buffer and actual processed data counts */
+       unsigned char           rx_buff[SLLIN_BUFF_LEN]; /* LIN Rx buffer */
+       unsigned char           tx_buff[SLLIN_BUFF_LEN]; /* LIN Tx buffer */
+       int                     rx_expect;      /* expected number of Rx chars */
+       int                     rx_lim;         /* maximum Rx chars for ID  */
+       int                     rx_cnt;         /* message buffer Rx fill level  */
+       int                     tx_lim;         /* actual limit of bytes to Tx */
+       int                     tx_cnt;         /* number of already Tx bytes */
+       char                    lin_master;     /* node is a master node */
+       int                     lin_baud;       /* LIN baudrate */
+       int                     lin_break_baud; /* Baudrate used for break send */
+       int                     lin_state;      /* state */
+       int                     id_to_send;     /* there is ID to be sent */
+
+       unsigned long           flags;          /* Flag values/ mode etc     */
+#define SLF_INUSE              0               /* Channel in use            */
+#define SLF_ERROR              1               /* Parity, etc. error        */
+#define SLF_RXEVENT            2               /* Rx wake event             */
+#define SLF_TXEVENT            3               /* Tx wake event             */
+#define SLF_MSGEVENT           4               /* CAN message to sent       */
+};
+
+int sllin_setup_msg(struct sllin *sl, int mode, int id,
+               unsigned char *data, int len);
+
+
+#ifdef __cplusplus
+} /* extern "C"*/
+#endif
+
+
+#endif /*_LIN_COMMON_H*/