pvrusb2-video-v4l.c

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/*
 *
 *
 *  Copyright (C) 2005 Mike Isely <[email protected]>
 *  Copyright (C) 2004 Aurelien Alleaume <[email protected]>
 *
 *  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
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/*

   This source file is specifically designed to interface with the
   saa711x support that is available in the v4l available starting
   with linux 2.6.15.

*/

#include "pvrusb2-video-v4l.h"



#include "pvrusb2-hdw-internal.h"
#include "pvrusb2-debug.h"
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/saa7115.h>
#include <linux/errno.h>

struct routing_scheme {
    const int *def;
    unsigned int cnt;
};


static const int routing_scheme0[] = {
    [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
    /* In radio mode, we mute the video, but point at one
       spot just to stay consistent */
    [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
    [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
    [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
};

static const struct routing_scheme routing_def0 = {
    .def = routing_scheme0,
    .cnt = ARRAY_SIZE(routing_scheme0),
};

static const int routing_scheme1[] = {
    [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
    [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
    [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
    [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
};

static const struct routing_scheme routing_def1 = {
    .def = routing_scheme1,
    .cnt = ARRAY_SIZE(routing_scheme1),
};

static const struct routing_scheme *routing_schemes[] = {
    [PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
    [PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
};

void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
{
    if (hdw->input_dirty || hdw->force_dirty) {
        const struct routing_scheme *sp;
        unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
        u32 input;

        pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
               hdw->input_val);

        sp = (sid < ARRAY_SIZE(routing_schemes)) ?
            routing_schemes[sid] : NULL;
        if ((sp == NULL) ||
            (hdw->input_val < 0) ||
            (hdw->input_val >= sp->cnt)) {
            pvr2_trace(PVR2_TRACE_ERROR_LEGS,
                   "*** WARNING *** subdev v4l2 set_input:"
                   " Invalid routing scheme (%u)"
                   " and/or input (%d)",
                   sid, hdw->input_val);
            return;
        }
        input = sp->def[hdw->input_val];
        sd->ops->video->s_routing(sd, input, 0, 0);
    }
}


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