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/*
*
* $Id: pvrusb2-audio.c,v 1.3 2006/01/01 08:26:03 mcisely Exp $
*
* 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
*
*/
#include "pvrusb2-audio.h"
#include "pvrusb2-hdw-internal.h"
#include "pvrusb2-debug.h"
#include "msp3400.h"
#include <linux/videodev.h>
#include <media/audiochip.h>
struct pvr2_msp3400_handler {
struct pvr2_hdw *hdw;
struct pvr2_i2c_client *client;
struct pvr2_i2c_handler i2c_handler;
struct pvr2_audio_stat astat;
unsigned long stale_mask;
};
/*
MCI <isely@pobox.com> 10-Mar-2005 - Rather than operate the msp34xx
directly, we rely on the msp3400.ko module to do it for us. We
really have to do this because that $##@!! module is going to attach
itself to us anyway, so we really can't operate the chip ourselves.
Unfortunately msp3400.ko is a real train wreck of a piece of code.
Most of the code below tries to tickle that module in just the right
way to get the results we need. Yuck. msp3400.c should be taken
out back and shot. Based on my reading of the actual chip datasheet
it should in theory be possible to write a far cleaner and simpler
driver than what is currently there right now.
*/
static int xlat_audiomode_to_v4l2(int id)
{
switch (id) {
case PVR2_CVAL_AUDIOMODE_MONO:
return V4L2_TUNER_MODE_MONO;
case PVR2_CVAL_AUDIOMODE_STEREO:
return V4L2_TUNER_MODE_STEREO;
case PVR2_CVAL_AUDIOMODE_SAP:
return V4L2_TUNER_MODE_SAP;
case PVR2_CVAL_AUDIOMODE_LANG1:
return V4L2_TUNER_MODE_LANG1;
case PVR2_CVAL_AUDIOMODE_LANG2:
return V4L2_TUNER_MODE_LANG2;
}
return V4L2_TUNER_MODE_STEREO;
}
/* This function selects the correct audio input source */
static void set_stereo(struct pvr2_msp3400_handler *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
unsigned short sarg = 0;
struct msp_matrix mspm;
pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 set_stereo");
if (hdw->controls[PVR2_CID_INPUT].value == PVR2_CVAL_INPUT_TV) {
struct v4l2_tuner vt;
memset(&vt,0,sizeof(vt));
vt.audmode = xlat_audiomode_to_v4l2(
hdw->controls[PVR2_CID_AUDIOMODE].value);
pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_TUNER,&vt);
}
sarg = AUDIO_TUNER;
switch (hdw->controls[PVR2_CID_INPUT].value) {
case PVR2_CVAL_INPUT_TV:
sarg = AUDIO_TUNER;
break;
case PVR2_CVAL_INPUT_RADIO:
/* Assume that msp34xx also handle FM decoding, in which case
we're still using the tuner. */
sarg = AUDIO_TUNER;
break;
case PVR2_CVAL_INPUT_SVIDEO:
case PVR2_CVAL_INPUT_COMPOSITE:
sarg = AUDIO_EXTERN;
break;
}
pvr2_i2c_client_cmd(ctxt->client,AUDC_SET_INPUT,&sarg);
/* The above should have been enough to do the job, however
msp3400.ko does an incomplete job of handling the scart
routing. Really. It doesn't even bother to initialize the
SC1 output at all. So we have to help it here...
Unfortunately this also means that we have include
msp3400.c's header file and it currently isn't in a public
place. Damnit! */
mspm.input = SCART_IN1_DA;
switch (hdw->controls[PVR2_CID_INPUT].value) {
case PVR2_CVAL_INPUT_SVIDEO:
case PVR2_CVAL_INPUT_COMPOSITE:
/* Bypass the DSP and just use IN1. In theory we
should be able to permanent just use IN1_DA, but to
do that msp3400.ko should be adjusting the DSP
input SCART routing correctly when doing video in.
Unfortunately that appears not to be the case. I
really hate that module. */
mspm.input = SCART_IN1;
break;
}
mspm.output = 1;
pvr2_i2c_client_cmd(ctxt->client,MSP_SET_MATRIX,&mspm);
}
static int check_stereo(struct pvr2_msp3400_handler *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
return hdw->controls[PVR2_CID_INPUT].dirty != 0;
}
struct pvr2_msp3400_ops {
void (*update)(struct pvr2_msp3400_handler *);
int (*check)(struct pvr2_msp3400_handler *);
};
static const struct pvr2_msp3400_ops msp3400_ops[] = {
{ .update = set_stereo, .check = check_stereo},
};
static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
{
unsigned long msk;
unsigned int idx;
for (idx = 0; idx < sizeof(msp3400_ops)/sizeof(msp3400_ops[0]);
idx++) {
msk = 1 << idx;
if (ctxt->stale_mask & msk) continue;
if (msp3400_ops[idx].check(ctxt)) {
ctxt->stale_mask |= msk;
}
}
return ctxt->stale_mask != 0;
}
static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
{
unsigned long msk;
unsigned int idx;
for (idx = 0; idx < sizeof(msp3400_ops)/sizeof(msp3400_ops[0]);
idx++) {
msk = 1 << idx;
if (!(ctxt->stale_mask & msk)) continue;
ctxt->stale_mask &= ~msk;
msp3400_ops[idx].update(ctxt);
}
}
/* This reads back the current volume parameters and signal type */
static int get_audio_status(struct pvr2_msp3400_handler *ctxt)
{
struct video_audio vt;
int stat;
memset(&vt,0,sizeof(vt));
stat = pvr2_i2c_client_cmd(ctxt->client,VIDIOCGAUDIO,&vt);
if (stat < 0) return stat;
ctxt->hdw->flag_stereo = (vt.mode & VIDEO_SOUND_STEREO) != 0;
ctxt->hdw->flag_bilingual =
(vt.mode & (VIDEO_SOUND_LANG1|VIDEO_SOUND_LANG2)) != 0;
return 0;
}
static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
{
ctxt->client->handler = 0;
ctxt->hdw->audio_stat = 0;
kfree(ctxt);
}
const static struct pvr2_i2c_handler_functions msp3400_funcs = {
.detach = (void (*)(void *))pvr2_msp3400_detach,
.check = (int (*)(void *))msp3400_check,
.update = (void (*)(void *))msp3400_update,
};
int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
{
struct pvr2_msp3400_handler *ctxt;
if (hdw->audio_stat) return 0;
if (cp->handler) return 0;
ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
if (!ctxt) return 0;
memset(ctxt,0,sizeof(*ctxt));
ctxt->i2c_handler.func_data = ctxt;
ctxt->i2c_handler.func_table = &msp3400_funcs;
ctxt->client = cp;
ctxt->hdw = hdw;
ctxt->astat.ctxt = ctxt;
ctxt->astat.status = (int (*)(void *))get_audio_status;
ctxt->astat.detach = (void (*)(void *))pvr2_msp3400_detach;
ctxt->stale_mask = 1 << ((sizeof(msp3400_ops)/
sizeof(msp3400_ops[0])) - 1);
cp->handler = &ctxt->i2c_handler;
hdw->audio_stat = &ctxt->astat;
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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