diff options
Diffstat (limited to 'drivers/char/diag/diagchar_hdlc.h')
| -rw-r--r-- | drivers/char/diag/diagchar_hdlc.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/char/diag/diagchar_hdlc.h b/drivers/char/diag/diagchar_hdlc.h new file mode 100644 index 0000000..2df81de --- /dev/null +++ b/drivers/char/diag/diagchar_hdlc.h @@ -0,0 +1,60 @@ +/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef DIAGCHAR_HDLC +#define DIAGCHAR_HDLC + +enum diag_send_state_enum_type { + DIAG_STATE_START, + DIAG_STATE_BUSY, + DIAG_STATE_CRC1, + DIAG_STATE_CRC2, + DIAG_STATE_TERM, + DIAG_STATE_COMPLETE +}; + +struct diag_send_desc_type { + const void *pkt; + const void *last; /* Address of last byte to send. */ + enum diag_send_state_enum_type state; + unsigned char terminate; /* True if this fragment + terminates the packet */ +}; + +struct diag_hdlc_dest_type { + void *dest; + void *dest_last; + /* Below: internal use only */ + uint16_t crc; +}; + +struct diag_hdlc_decode_type { + uint8_t *src_ptr; + unsigned int src_idx; + unsigned int src_size; + uint8_t *dest_ptr; + unsigned int dest_idx; + unsigned int dest_size; + int escaping; + +}; + +void diag_hdlc_encode(struct diag_send_desc_type *src_desc, + struct diag_hdlc_dest_type *enc); + +int diag_hdlc_decode(struct diag_hdlc_decode_type *hdlc); + +#define ESC_CHAR 0x7D +#define CONTROL_CHAR 0x7E +#define ESC_MASK 0x20 + +#endif |