// SPDX-License-Identifier: GPL-2.0-only
/*
 *
 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
 *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
 */

/*

   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/i2c/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);
        }
}