1/*********************************************************************
  2 *                
  3 * Filename:      parameters.h
  4 * Version:       1.0
  5 * Description:   A more general way to handle (pi,pl,pv) parameters
  6 * Status:        Experimental.
  7 * Author:        Dag Brattli <dagb@cs.uit.no>
  8 * Created at:    Mon Jun  7 08:47:28 1999
  9 * Modified at:   Sun Jan 30 14:05:14 2000
 10 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 11 * 
 12 *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
 13 *     
 14 *     This program is free software; you can redistribute it and/or 
 15 *     modify it under the terms of the GNU General Public License as 
 16 *     published by the Free Software Foundation; either version 2 of 
 17 *     the License, or (at your option) any later version.
 18 * 
 19 *     This program is distributed in the hope that it will be useful,
 20 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 21 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 22 *     GNU General Public License for more details.
 23 * 
 24 *     You should have received a copy of the GNU General Public License 
 25 *     along with this program; if not, see <http://www.gnu.org/licenses/>.
 26 *
 27 *     Michel Dänzer <daenzer@debian.org>, 10/2001
 28 *     - simplify irda_pv_t to avoid endianness issues
 29 *     
 30 ********************************************************************/
 31
 32#ifndef IRDA_PARAMS_H
 33#define IRDA_PARAMS_H
 34
 35/*
 36 *  The currently supported types. Beware not to change the sequence since
 37 *  it a good reason why the sized integers has a value equal to their size
 38 */
 39typedef enum {
 40	PV_INTEGER,      /* Integer of any (pl) length */
 41	PV_INT_8_BITS,   /* Integer of 8 bits in length */
 42	PV_INT_16_BITS,  /* Integer of 16 bits in length */
 43	PV_STRING,       /* \0 terminated string */
 44	PV_INT_32_BITS,  /* Integer of 32 bits in length */
 45	PV_OCT_SEQ,      /* Octet sequence */
 46	PV_NO_VALUE      /* Does not contain any value (pl=0) */
 47} PV_TYPE;
 48
 49/* Bit 7 of type field */
 50#define PV_BIG_ENDIAN    0x80 
 51#define PV_LITTLE_ENDIAN 0x00
 52#define PV_MASK          0x7f   /* To mask away endian bit */
 53
 54#define PV_PUT 0
 55#define PV_GET 1
 56
 57typedef union {
 58	char   *c;
 59	__u32   i;
 60	__u32 *ip;
 61} irda_pv_t;
 62
 63typedef struct {
 64	__u8 pi;
 65	__u8 pl;
 66	irda_pv_t pv;
 67} irda_param_t;
 68
 69typedef int (*PI_HANDLER)(void *self, irda_param_t *param, int get);
 70typedef int (*PV_HANDLER)(void *self, __u8 *buf, int len, __u8 pi,
 71			  PV_TYPE type, PI_HANDLER func);
 72
 73typedef struct {
 74	const PI_HANDLER func;  /* Handler for this parameter identifier */
 75	PV_TYPE    type;  /* Data type for this parameter */
 76} pi_minor_info_t;
 77
 78typedef struct {
 79	const pi_minor_info_t *pi_minor_call_table;
 80	int len;
 81} pi_major_info_t;
 82
 83typedef struct {
 84	const pi_major_info_t *tables;
 85	int              len;
 86	__u8             pi_mask;
 87	int              pi_major_offset;
 88} pi_param_info_t;
 89
 90int irda_param_pack(__u8 *buf, char *fmt, ...);
 91
 92int irda_param_insert(void *self, __u8 pi, __u8 *buf, int len, 
 93		      pi_param_info_t *info);
 94int irda_param_extract_all(void *self, __u8 *buf, int len, 
 95			   pi_param_info_t *info);
 96
 97#define irda_param_insert_byte(buf,pi,pv) irda_param_pack(buf,"bbb",pi,1,pv)
 98
 99#endif /* IRDA_PARAMS_H */
100