cdparanoia/interface/low_interface.h

   1 /******************************************************************
   2  * CopyPolicy: GNU Lesser General Public License 2.1 applies
   3  * Copyright (C) 1998-2008 Monty xiphmont@mit.edu
   4  *
   5  * internal include file for cdda interface kit for Linux
   6  *
   7  ******************************************************************/
   8
   9 #ifndef _cdda_low_interface_
  10 #define _cdda_low_interface_
  11
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <string.h>
  17 #include <errno.h>
  18 #include <fcntl.h>
  19 #include <time.h>
  20
  21 #include <sys/ioctl.h>
  22 #include <sys/stat.h>
  23 #include <sys/ipc.h>
  24 #include <sys/sem.h>
  25 #include <sys/shm.h>
  26 #include <sys/time.h>
  27 #include <sys/types.h>
  28
  29 #include <linux/major.h>
  30 #include <linux/version.h>
  31
  32 /* some include file locations have changed with newer kernels */
  33
  34 #ifdef SBPCD_H
  35 #include <linux/sbpcd.h>
  36 #endif
  37
  38 #ifdef UCDROM_H
  39 #include <linux/ucdrom.h>
  40 #endif
  41
  42 #ifndef CDROMAUDIOBUFSIZ
  43 #define CDROMAUDIOBUFSIZ        0x5382 /* set the audio buffer size */
  44 #endif
  45
  46 #ifndef CDROM_GET_CAPABILITY
  47 #define CDROM_GET_CAPABILITY    0x5331 /* get CDROM capabilites if CDROM */
  48 #endif
  49
  50
  51 #include <scsi/sg.h>
  52 #include <scsi/scsi.h>
  53
  54 #include <linux/cdrom.h>
  55 #include <linux/major.h>
  56
  57 #include "cdda_interface.h"
  58
  59 #ifndef SG_EMULATED_HOST
  60 /* old kernel version; the check for the ioctl is still runtime, this
  61    is just to build */
  62 #define SG_EMULATED_HOST 0x2203
  63 #define SG_SET_TRANSFORM 0x2204
  64 #define SG_GET_TRANSFORM 0x2205
  65 #endif
  66
  67 #ifndef SG_IO
  68 /* old kernel version; the usage is all runtime-safe, this is just to
  69    build */
  70 typedef struct sg_io_hdr
  71 {
  72   int interface_id;           /* [i] 'S' for SCSI generic (required) */
  73   int dxfer_direction;        /* [i] data transfer direction  */
  74   unsigned char cmd_len;      /* [i] SCSI command length ( <= 16 bytes) */
  75   unsigned char mx_sb_len;    /* [i] max length to write to sbp */
  76   unsigned short int iovec_count; /* [i] 0 implies no scatter gather */
  77   unsigned int dxfer_len;     /* [i] byte count of data transfer */
  78   void * dxferp;              /* [i], [*io] points to data transfer memory
  79                                  or scatter gather list */
  80   unsigned char * cmdp;       /* [i], [*i] points to command to perform */
  81   unsigned char * sbp;        /* [i], [*o] points to sense_buffer memory */
  82   unsigned int timeout;       /* [i] MAX_UINT->no timeout (unit: millisec) */
  83   unsigned int flags;         /* [i] 0 -> default, see SG_FLAG... */
  84   int pack_id;                /* [i->o] unused internally (normally) */
  85   void * usr_ptr;             /* [i->o] unused internally */
  86   unsigned char status;       /* [o] scsi status */
  87   unsigned char masked_status;/* [o] shifted, masked scsi status */
  88   unsigned char msg_status;   /* [o] messaging level data (optional) */
  89   unsigned char sb_len_wr;    /* [o] byte count actually written to sbp */
  90   unsigned short int host_status; /* [o] errors from host adapter */
  91   unsigned short int driver_status;/* [o] errors from software driver */
  92   int resid;                  /* [o] dxfer_len - actual_transferred */
  93   unsigned int duration;      /* [o] time taken by cmd (unit: millisec) */
  94   unsigned int info;          /* [o] auxiliary information */
  95 } sg_io_hdr_t;
  96
  97
  98 #endif
  99
 100 struct cdda_private_data {
 101   struct sg_header *sg_hd;
 102   unsigned char *sg_buffer; /* points into sg_hd */
 103   clockid_t clock;
 104   int last_milliseconds;
 105
 106   int  (*cache_clear)  (struct cdrom_drive *d, int lba, int sectors);
 107 };
 108
 109 #define MAX_RETRIES 8
 110 #define MAX_BIG_BUFF_SIZE 65536
 111 #define MIN_BIG_BUFF_SIZE 4096
 112 #define SG_OFF sizeof(struct sg_header)
 113
 114 extern int  cooked_init_drive (cdrom_drive *d);
 115 extern unsigned char *scsi_inquiry (cdrom_drive *d);
 116 extern int  scsi_init_drive (cdrom_drive *d);
 117 #ifdef CDDA_TEST
 118 extern int  test_init_drive (cdrom_drive *d);
 119 #endif
 120 #endif
 121