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kernel/linux-imx6_3.14.28/include/net/irda/qos.h 2.88 KB
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  /*********************************************************************
   *                
   * Filename:      qos.h
   * Version:       1.0
   * Description:   Quality of Service definitions
   * Status:        Experimental.
   * Author:        Dag Brattli <dagb@cs.uit.no>
   * Created at:    Fri Sep 19 23:21:09 1997
   * Modified at:   Thu Dec  2 13:51:54 1999
   * Modified by:   Dag Brattli <dagb@cs.uit.no>
   * 
   *     Copyright (c) 1999 Dag Brattli, 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 as 
   *     published by the Free Software Foundation; either version 2 of 
   *     the License, or (at your option) any later version.
   * 
   *     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.
   * 
   *     You should have received a copy of the GNU General Public License 
   *     along with this program; if not, see <http://www.gnu.org/licenses/>.
   *     
   ********************************************************************/
  
  #ifndef IRDA_QOS_H
  #define IRDA_QOS_H
  
  #include <linux/skbuff.h>
  
  #include <net/irda/parameters.h>
  
  #define PI_BAUD_RATE     0x01
  #define PI_MAX_TURN_TIME 0x82
  #define PI_DATA_SIZE     0x83
  #define PI_WINDOW_SIZE   0x84
  #define PI_ADD_BOFS      0x85
  #define PI_MIN_TURN_TIME 0x86
  #define PI_LINK_DISC     0x08
  
  #define IR_115200_MAX 0x3f
  
  /* Baud rates (first byte) */
  #define IR_2400     0x01
  #define IR_9600     0x02
  #define IR_19200    0x04
  #define IR_38400    0x08
  #define IR_57600    0x10
  #define IR_115200   0x20
  #define IR_576000   0x40
  #define IR_1152000  0x80
  
  /* Baud rates (second byte) */
  #define IR_4000000  0x01
  #define IR_16000000 0x02
  
  /* Quality of Service information */
  typedef struct {
  	__u32 value;
  	__u16 bits; /* LSB is first byte, MSB is second byte */
  } qos_value_t;
  
  struct qos_info {
  	magic_t magic;
  
  	qos_value_t baud_rate;       /* IR_11520O | ... */
  	qos_value_t max_turn_time;
  	qos_value_t data_size;
  	qos_value_t window_size;
  	qos_value_t additional_bofs;
  	qos_value_t min_turn_time;
  	qos_value_t link_disc_time;
  	
  	qos_value_t power;
  };
  
  extern int sysctl_max_baud_rate;
  extern int sysctl_max_inactive_time;
  
  void irda_init_max_qos_capabilies(struct qos_info *qos);
  void irda_qos_compute_intersection(struct qos_info *, struct qos_info *);
  
  __u32 irlap_max_line_capacity(__u32 speed, __u32 max_turn_time);
  
  void irda_qos_bits_to_value(struct qos_info *qos);
  
  /* So simple, how could we not inline those two ?
   * Note : one byte is 10 bits if you include start and stop bits
   * Jean II */
  #define irlap_min_turn_time_in_bytes(speed, min_turn_time) (	\
  	speed * min_turn_time / 10000000			\
  )
  #define irlap_xbofs_in_usec(speed, xbofs) (			\
  	xbofs * 10000000 / speed				\
  )
  
  #endif