linux_kernel/drivers/media/usb/pvrusb2/pvrusb2-cx2584x-v4l.c

/*
 *
 *
 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
 *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
 *
 *  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.
 *
 */

/*

   This source file is specifically designed to interface with the
   cx2584x, in kernels 2.6.16 or newer.

*/

#include "pvrusb2-cx2584x-v4l.h"
#include "pvrusb2-video-v4l.h"


#include "pvrusb2-hdw-internal.h"
#include "pvrusb2-debug.h"
#include <media/drv-intf/cx25840.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/errno.h>


struct routing_scheme_item {
	int vid;
	int aud;
};

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

static const struct routing_scheme_item routing_scheme0[] = {
	[PVR2_CVAL_INPUT_TV] = {
		.vid = CX25840_COMPOSITE7,
		.aud = CX25840_AUDIO8,
	},
	[PVR2_CVAL_INPUT_RADIO] = { /* Treat the same as composite */
		.vid = CX25840_COMPOSITE3,
		.aud = CX25840_AUDIO_SERIAL,
	},
	[PVR2_CVAL_INPUT_COMPOSITE] = {
		.vid = CX25840_COMPOSITE3,
		.aud = CX25840_AUDIO_SERIAL,
	},
	[PVR2_CVAL_INPUT_SVIDEO] = {
		.vid = CX25840_SVIDEO1,
		.aud = CX25840_AUDIO_SERIAL,
	},
};

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

/* Specific to gotview device */
static const struct routing_scheme_item routing_schemegv[] = {
	[PVR2_CVAL_INPUT_TV] = {
		.vid = CX25840_COMPOSITE2,
		.aud = CX25840_AUDIO5,
	},
	[PVR2_CVAL_INPUT_RADIO] = {
		/* line-in is used for radio and composite.  A GPIO is
		   used to switch between the two choices. */
		.vid = CX25840_COMPOSITE1,
		.aud = CX25840_AUDIO_SERIAL,
	},
	[PVR2_CVAL_INPUT_COMPOSITE] = {
		.vid = CX25840_COMPOSITE1,
		.aud = CX25840_AUDIO_SERIAL,
	},
	[PVR2_CVAL_INPUT_SVIDEO] = {
		.vid = (CX25840_SVIDEO_LUMA3|CX25840_SVIDEO_CHROMA4),
		.aud = CX25840_AUDIO_SERIAL,
	},
};

static const struct routing_scheme routing_defgv = {
	.def = routing_schemegv,
	.cnt = ARRAY_SIZE(routing_schemegv),
};

/* Specific to grabster av400 device */
static const struct routing_scheme_item routing_schemeav400[] = {
	[PVR2_CVAL_INPUT_COMPOSITE] = {
		.vid = CX25840_COMPOSITE1,
		.aud = CX25840_AUDIO_SERIAL,
	},
	[PVR2_CVAL_INPUT_SVIDEO] = {
		.vid = (CX25840_SVIDEO_LUMA2|CX25840_SVIDEO_CHROMA4),
		.aud = CX25840_AUDIO_SERIAL,
	},
};

static const struct routing_scheme routing_defav400 = {
	.def = routing_schemeav400,
	.cnt = ARRAY_SIZE(routing_schemeav400),
};

static const struct routing_scheme *routing_schemes[] = {
	[PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
	[PVR2_ROUTING_SCHEME_GOTVIEW] = &routing_defgv,
	[PVR2_ROUTING_SCHEME_AV400] = &routing_defav400,
};

void pvr2_cx25840_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
{
	pvr2_trace(PVR2_TRACE_CHIPS, "subdev cx2584x update...");
	if (hdw->input_dirty || hdw->force_dirty) {
		enum cx25840_video_input vid_input;
		enum cx25840_audio_input aud_input;
		const struct routing_scheme *sp;
		unsigned int sid = hdw->hdw_desc->signal_routing_scheme;

		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 cx2584x set_input: Invalid routing scheme (%u) and/or input (%d)",
				   sid, hdw->input_val);
			return;
		}
		vid_input = sp->def[hdw->input_val].vid;
		aud_input = sp->def[hdw->input_val].aud;
		pvr2_trace(PVR2_TRACE_CHIPS,
			   "subdev cx2584x set_input vid=0x%x aud=0x%x",
			   vid_input, aud_input);
		sd->ops->video->s_routing(sd, (u32)vid_input, 0, 0);
		sd->ops->audio->s_routing(sd, (u32)aud_input, 0, 0);
	}
}