drivers/media/video/pvrusb2/pvrusb2-video-v4l.c - maze/linux - Git at Google

 /*
  *
  *  $Id$
  *
  *  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.
  *
  *  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-i2c-cmd-v4l2.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>
 #include <linux/slab.h>

 struct pvr2_v4l_decoder {
 	struct pvr2_i2c_handler handler;
 	struct pvr2_decoder_ctrl ctrl;
 	struct pvr2_i2c_client *client;
 	struct pvr2_hdw *hdw;
 	unsigned long stale_mask;
 };


 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_schemes[] = {
 	[PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
 		.def = routing_scheme0,
 		.cnt = ARRAY_SIZE(routing_scheme0),
 	},
 };

 static void set_input(struct pvr2_v4l_decoder *ctxt)
 {
 	struct pvr2_hdw *hdw = ctxt->hdw;
 	struct v4l2_routing route;
 	const struct routing_scheme *sp;
 	unsigned int sid = hdw->hdw_desc->signal_routing_scheme;

 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);

 	if ((sid < ARRAY_SIZE(routing_schemes)) &&
 	    ((sp = routing_schemes + sid) != NULL) &&
 	    (hdw->input_val >= 0) &&
 	    (hdw->input_val < sp->cnt)) {
 		route.input = sp->def[hdw->input_val];
 	} else {
 		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 			   "*** WARNING *** i2c v4l2 set_input:"
 			   " Invalid routing scheme (%u) and/or input (%d)",
 			   sid,hdw->input_val);
 		return;
 	}

 	route.output = 0;
 	pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
 }


 static int check_input(struct pvr2_v4l_decoder *ctxt)
 {
 	struct pvr2_hdw *hdw = ctxt->hdw;
 	return hdw->input_dirty != 0;
 }


 static void set_audio(struct pvr2_v4l_decoder *ctxt)
 {
 	u32 val;
 	struct pvr2_hdw *hdw = ctxt->hdw;

 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d",
 		   hdw->srate_val);
 	switch (hdw->srate_val) {
 	default:
 	case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
 		val = 48000;
 		break;
 	case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
 		val = 44100;
 		break;
 	case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
 		val = 32000;
 		break;
 	}
 	pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
 }


 static int check_audio(struct pvr2_v4l_decoder *ctxt)
 {
 	struct pvr2_hdw *hdw = ctxt->hdw;
 	return hdw->srate_dirty != 0;
 }


 struct pvr2_v4l_decoder_ops {
 	void (*update)(struct pvr2_v4l_decoder *);
 	int (*check)(struct pvr2_v4l_decoder *);
 };


 static const struct pvr2_v4l_decoder_ops decoder_ops[] = {
 	{ .update = set_input, .check = check_input},
 	{ .update = set_audio, .check = check_audio},
 };


 static void decoder_detach(struct pvr2_v4l_decoder *ctxt)
 {
 	ctxt->client->handler = NULL;
 	pvr2_hdw_set_decoder(ctxt->hdw,NULL);
 	kfree(ctxt);
 }


 static int decoder_check(struct pvr2_v4l_decoder *ctxt)
 {
 	unsigned long msk;
 	unsigned int idx;

 	for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 		msk = 1 << idx;
 		if (ctxt->stale_mask & msk) continue;
 		if (decoder_ops[idx].check(ctxt)) {
 			ctxt->stale_mask |= msk;
 		}
 	}
 	return ctxt->stale_mask != 0;
 }


 static void decoder_update(struct pvr2_v4l_decoder *ctxt)
 {
 	unsigned long msk;
 	unsigned int idx;

 	for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 		msk = 1 << idx;
 		if (!(ctxt->stale_mask & msk)) continue;
 		ctxt->stale_mask &= ~msk;
 		decoder_ops[idx].update(ctxt);
 	}
 }


 static int decoder_detect(struct pvr2_i2c_client *cp)
 {
 	/* Attempt to query the decoder - let's see if it will answer */
 	struct v4l2_tuner vt;
 	int ret;

 	memset(&vt,0,sizeof(vt));
 	ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt);
 	return ret == 0; /* Return true if it answered */
 }


 static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl)
 {
 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl);
 	pvr2_v4l2_cmd_stream(ctxt->client,fl);
 }


 static unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt)
 {
 	return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l");
 }


 static const struct pvr2_i2c_handler_functions hfuncs = {
 	.detach = (void (*)(void *))decoder_detach,
 	.check = (int (*)(void *))decoder_check,
 	.update = (void (*)(void *))decoder_update,
 	.describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
 };


 int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
 			       struct pvr2_i2c_client *cp)
 {
 	struct pvr2_v4l_decoder *ctxt;

 	if (hdw->decoder_ctrl) return 0;
 	if (cp->handler) return 0;
 	if (!decoder_detect(cp)) return 0;

 	ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
 	if (!ctxt) return 0;

 	ctxt->handler.func_data = ctxt;
 	ctxt->handler.func_table = &hfuncs;
 	ctxt->ctrl.ctxt = ctxt;
 	ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
 	ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
 	ctxt->client = cp;
 	ctxt->hdw = hdw;
 	ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
 	pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
 	cp->handler = &ctxt->handler;
 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
 		   cp->client->addr);
 	return !0;
 }


 /*
   Stuff for Emacs to see, in order to encourage consistent editing style:
   *** Local Variables: ***
   *** mode: c ***
   *** fill-column: 70 ***
   *** tab-width: 8 ***
   *** c-basic-offset: 8 ***
   *** End: ***
   */
	/*
	*
	* $Id$
	*
	* 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.
	*
	* 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-i2c-cmd-v4l2.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>
	#include <linux/slab.h>

	struct pvr2_v4l_decoder {
	struct pvr2_i2c_handler handler;
	struct pvr2_decoder_ctrl ctrl;
	struct pvr2_i2c_client *client;
	struct pvr2_hdw *hdw;
	unsigned long stale_mask;
	};


	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_schemes[] = {
	[PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
	.def = routing_scheme0,
	.cnt = ARRAY_SIZE(routing_scheme0),
	},
	};

	static void set_input(struct pvr2_v4l_decoder *ctxt)
	{
	struct pvr2_hdw *hdw = ctxt->hdw;
	struct v4l2_routing route;
	const struct routing_scheme *sp;
	unsigned int sid = hdw->hdw_desc->signal_routing_scheme;

	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);

	if ((sid < ARRAY_SIZE(routing_schemes)) &&
	((sp = routing_schemes + sid) != NULL) &&
	(hdw->input_val >= 0) &&
	(hdw->input_val < sp->cnt)) {
	route.input = sp->def[hdw->input_val];
	} else {
	pvr2_trace(PVR2_TRACE_ERROR_LEGS,
	"* WARNING * i2c v4l2 set_input:"
	" Invalid routing scheme (%u) and/or input (%d)",
	sid,hdw->input_val);
	return;
	}

	route.output = 0;
	pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
	}


	static int check_input(struct pvr2_v4l_decoder *ctxt)
	{
	struct pvr2_hdw *hdw = ctxt->hdw;
	return hdw->input_dirty != 0;
	}


	static void set_audio(struct pvr2_v4l_decoder *ctxt)
	{
	u32 val;
	struct pvr2_hdw *hdw = ctxt->hdw;

	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d",
	hdw->srate_val);
	switch (hdw->srate_val) {
	default:
	case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
	val = 48000;
	break;
	case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
	val = 44100;
	break;
	case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
	val = 32000;
	break;
	}
	pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
	}


	static int check_audio(struct pvr2_v4l_decoder *ctxt)
	{
	struct pvr2_hdw *hdw = ctxt->hdw;
	return hdw->srate_dirty != 0;
	}


	struct pvr2_v4l_decoder_ops {
	void (update)(struct pvr2_v4l_decoder );
	int (check)(struct pvr2_v4l_decoder );
	};


	static const struct pvr2_v4l_decoder_ops decoder_ops[] = {
	{ .update = set_input, .check = check_input},
	{ .update = set_audio, .check = check_audio},
	};


	static void decoder_detach(struct pvr2_v4l_decoder *ctxt)
	{
	ctxt->client->handler = NULL;
	pvr2_hdw_set_decoder(ctxt->hdw,NULL);
	kfree(ctxt);
	}


	static int decoder_check(struct pvr2_v4l_decoder *ctxt)
	{
	unsigned long msk;
	unsigned int idx;

	for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
	msk = 1 << idx;
	if (ctxt->stale_mask & msk) continue;
	if (decoder_ops[idx].check(ctxt)) {
	ctxt->stale_mask \|= msk;
	}
	}
	return ctxt->stale_mask != 0;
	}


	static void decoder_update(struct pvr2_v4l_decoder *ctxt)
	{
	unsigned long msk;
	unsigned int idx;

	for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
	msk = 1 << idx;
	if (!(ctxt->stale_mask & msk)) continue;
	ctxt->stale_mask &= ~msk;
	decoder_ops[idx].update(ctxt);
	}
	}


	static int decoder_detect(struct pvr2_i2c_client *cp)
	{
	/* Attempt to query the decoder - let's see if it will answer */
	struct v4l2_tuner vt;
	int ret;

	memset(&vt,0,sizeof(vt));
	ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt);
	return ret == 0; /* Return true if it answered */
	}


	static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl)
	{
	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl);
	pvr2_v4l2_cmd_stream(ctxt->client,fl);
	}


	static unsigned int decoder_describe(struct pvr2_v4l_decoder ctxt,char buf,unsigned int cnt)
	{
	return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l");
	}


	static const struct pvr2_i2c_handler_functions hfuncs = {
	.detach = (void ()(void ))decoder_detach,
	.check = (int ()(void ))decoder_check,
	.update = (void ()(void ))decoder_update,
	.describe = (unsigned int ()(void ,char *,unsigned int))decoder_describe,
	};


	int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
	struct pvr2_i2c_client *cp)
	{
	struct pvr2_v4l_decoder *ctxt;

	if (hdw->decoder_ctrl) return 0;
	if (cp->handler) return 0;
	if (!decoder_detect(cp)) return 0;

	ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
	if (!ctxt) return 0;

	ctxt->handler.func_data = ctxt;
	ctxt->handler.func_table = &hfuncs;
	ctxt->ctrl.ctxt = ctxt;
	ctxt->ctrl.detach = (void ()(void ))decoder_detach;
	ctxt->ctrl.enable = (void ()(void ,int))decoder_enable;
	ctxt->client = cp;
	ctxt->hdw = hdw;
	ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
	pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
	cp->handler = &ctxt->handler;
	pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
	cp->client->addr);
	return !0;
	}




	/*
	Stuff for Emacs to see, in order to encourage consistent editing style:
	* Local Variables: *
	* mode: c *
	* fill-column: 70 *
	* tab-width: 8 *
	* c-basic-offset: 8 *
	* End: *
	*/