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681c739944
linux/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
Mike Isely 681c739944 V4L/DVB (6691): pvrusb2: Rework pipeline state control 
This is a new implementation for video pipeline control within the
pvrusb2 driver.  Actual start/stop of the pipeline is moved to the
driver's kernel thread.  Pipeline stages are controlled autonomously
based on surrounding pipeline or application control state.  Kernel
thread management is also cleaned up and moved into the internal
control structure of the driver, solving a set up / tear down race
along the way.  Better failure recovery is implemented with this new
control strategy.  Also with this change comes better control of the
cx23416 encoder, building on additional information learned about the
peculiarities of controlling this part (this information was the
original trigger for this rework).  With this change, overall encoder
stability should be considerably improved.  Yes, this is a large
change for this driver, but due to the nature of the feature being
worked on, the changes are fairly pervasive and would be difficult to
break into smaller pieces with any semblence of step-wise stability.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-01-25 19:03:01 -02:00

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/*
*
* $Id$
*
* 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
cx2584x, in kernels 2.6.16 or newer.
*/
#include "pvrusb2-cx2584x-v4l.h"
#include "pvrusb2-video-v4l.h"
#include "pvrusb2-i2c-cmd-v4l2.h"
#include "pvrusb2-hdw-internal.h"
#include "pvrusb2-debug.h"
#include <media/cx25840.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/errno.h>
#include <linux/slab.h>
struct pvr2_v4l_cx2584x {
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_cx2584x *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
struct v4l2_routing route;
enum cx25840_video_input vid_input;
enum cx25840_audio_input aud_input;
memset(&route,0,sizeof(route));
switch(hdw->input_val) {
case PVR2_CVAL_INPUT_TV:
vid_input = CX25840_COMPOSITE7;
aud_input = CX25840_AUDIO8;
break;
case PVR2_CVAL_INPUT_RADIO: // Treat same as composite
case PVR2_CVAL_INPUT_COMPOSITE:
vid_input = CX25840_COMPOSITE3;
aud_input = CX25840_AUDIO_SERIAL;
break;
case PVR2_CVAL_INPUT_SVIDEO:
vid_input = CX25840_SVIDEO1;
aud_input = CX25840_AUDIO_SERIAL;
break;
default:
// Just set it to be composite input for now...
vid_input = CX25840_COMPOSITE3;
aud_input = CX25840_AUDIO_SERIAL;
break;
}
pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_input vid=0x%x aud=0x%x",
vid_input,aud_input);
route.input = (u32)vid_input;
pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
route.input = (u32)aud_input;
pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
}
static int check_input(struct pvr2_v4l_cx2584x *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
return hdw->input_dirty != 0;
}
static void set_audio(struct pvr2_v4l_cx2584x *ctxt)
{
u32 val;
struct pvr2_hdw *hdw = ctxt->hdw;
pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x 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_cx2584x *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
return hdw->srate_dirty != 0;
}
struct pvr2_v4l_cx2584x_ops {
void (*update)(struct pvr2_v4l_cx2584x *);
int (*check)(struct pvr2_v4l_cx2584x *);
};
static const struct pvr2_v4l_cx2584x_ops decoder_ops[] = {
{ .update = set_input, .check = check_input},
{ .update = set_audio, .check = check_audio},
};
static void decoder_detach(struct pvr2_v4l_cx2584x *ctxt)
{
ctxt->client->handler = NULL;
pvr2_hdw_set_decoder(ctxt->hdw,NULL);
kfree(ctxt);
}
static int decoder_check(struct pvr2_v4l_cx2584x *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_cx2584x *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 void decoder_enable(struct pvr2_v4l_cx2584x *ctxt,int fl)
{
pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_enable(%d)",fl);
pvr2_v4l2_cmd_stream(ctxt->client,fl);
}
static int decoder_detect(struct pvr2_i2c_client *cp)
{
int ret;
/* Attempt to query the decoder - let's see if it will answer */
struct v4l2_queryctrl qc;
memset(&qc,0,sizeof(qc));
qc.id = V4L2_CID_BRIGHTNESS;
ret = pvr2_i2c_client_cmd(cp,VIDIOC_QUERYCTRL,&qc);
return ret == 0; /* Return true if it answered */
}
static unsigned int decoder_describe(struct pvr2_v4l_cx2584x *ctxt,
char *buf,unsigned int cnt)
{
return scnprintf(buf,cnt,"handler: pvrusb2-cx2584x-v4l");
}
static void decoder_reset(struct pvr2_v4l_cx2584x *ctxt)
{
int ret;
ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,NULL);
pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_reset (ret=%d)",ret);
}
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_cx2584x_v4l_setup(struct pvr2_hdw *hdw,
struct pvr2_i2c_client *cp)
{
struct pvr2_v4l_cx2584x *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->ctrl.force_reset = (void (*)(void*))decoder_reset;
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;
{
/*
Mike Isely <isely@pobox.com> 19-Nov-2006 - This bit
of nuttiness for cx25840 causes that module to
correctly set up its video scaling. This is really
a problem in the cx25840 module itself, but we work
around it here. The problem has not been seen in
ivtv because there VBI is supported and set up. We
don't do VBI here (at least not yet) and thus we
never attempted to even set it up.
*/
struct v4l2_format fmt;
memset(&fmt,0,sizeof(fmt));
fmt.type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_FMT,&fmt);
}
pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x cx2584x 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: ***
*/
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