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/*
* $Id$
*
* This file is part of WorkMan, the civilized CD player library
* (c) 1991-1997 by Steven Grimm (original author)
* (c) by Dirk Försterling (current 'author' = maintainer)
* The maintainer can be contacted by his e-mail address:
* milliByte@DeathsDoor.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA
*
*
* Vendor-specific drive control routines for Toshiba XM-3401 series.
*/
static char drv_toshiba_id[] = "$Id$";
#include <stdio.h>
#include <errno.h>
#include "include/wm_config.h"
#include "include/wm_struct.h"
#include "include/wm_scsi.h"
#define SCMD_TOSH_EJECT 0xc4
/* local prototypes */
static int tosh_init( struct wm_drive *d );
static int tosh_eject( struct wm_drive *d );
static int tosh_set_volume( struct wm_drive *d, int left, int right );
static int tosh_get_volume( struct wm_drive *d, int *left, int *right );
struct wm_drive_proto toshiba_proto = {
tosh_init, /* functions... */
gen_close,
gen_get_trackcount,
gen_get_cdlen,
gen_get_trackinfo,
gen_get_drive_status,
tosh_get_volume,
tosh_set_volume,
gen_pause,
gen_resume,
gen_stop,
gen_play,
tosh_eject,
gen_closetray,
NULL /* gen_get_cdtext */
};
/*
* Initialize the driver.
*/
static int
tosh_init( struct wm_drive *d )
{
extern int min_volume;
/* Sun use Toshiba drives as well */
#if defined(SYSV) && defined(CODEC)
codec_init();
#endif
min_volume = 0;
return ( 0 );
}
/*
* Send the Toshiba code to eject the CD.
*/
static int
tosh_eject( struct wm_drive *d )
{
return (sendscsi(d, NULL, 0, 0, SCMD_TOSH_EJECT, 1, 0,0,0,0,0,0,0,0,0,0));
}
/*
* Set the volume. The low end of the scale is more sensitive than the high
* end, so make up for that by transforming the volume parameters to a square
* curve.
*/
static int
tosh_set_volume( struct wm_drive *d, int left, int right )
{
left = (left * left * left) / 10000;
right = (right * right * right) / 10000;
return (gen_set_volume(d, left, right));
}
/*
* Undo the transformation above using a binary search (so no floating-point
* math is required.)
*/
static int
unscale_volume(cd_vol, max)
int cd_vol, max;
{
int vol = 0, top = max, bot = 0, scaled = 0;
/*cd_vol = (cd_vol * 100 + (max_volume - 1)) / max_volume;*/
while (bot <= top)
{
vol = (top + bot) / 2;
scaled = (vol * vol) / max;
if (cd_vol <= scaled)
top = vol - 1;
else
bot = vol + 1;
}
/* Might have looked down too far for repeated scaled values */
if (cd_vol < scaled)
vol++;
if (vol < 0)
vol = 0;
else if (vol > max)
vol = max;
return (vol);
}
/*
* Get the volume.
*/
static int
tosh_get_volume( struct wm_drive *d, int *left, int *right )
{
int status;
status = gen_get_volume(d, left, right);
if (status < 0)
return (status);
*left = unscale_volume(*left, 100);
*right = unscale_volume(*right, 100);
return (0);
}
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