/*
*
* $Id$
*
* 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;
};
static void set_input(struct pvr2_v4l_decoder *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
struct v4l2_routing route;
pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);
switch(hdw->input_val) {
case PVR2_CVAL_INPUT_TV:
route.input = SAA7115_COMPOSITE4;
break;
case PVR2_CVAL_INPUT_COMPOSITE:
route.input = SAA7115_COMPOSITE5;
break;
case PVR2_CVAL_INPUT_SVIDEO:
route.input = SAA7115_SVIDEO2;
break;
case PVR2_CVAL_INPUT_RADIO:
// In radio mode, we mute the video, but point at one
// spot just to stay consistent
route.input = SAA7115_COMPOSITE5;
default:
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;
ctxt->hdw->decoder_ctrl = 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;
hdw->decoder_ctrl = &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: ***
*/
