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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
wm8775.
*/
#include "pvrusb2-wm8775.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 <linux/errno.h>
#include <linux/slab.h>
struct pvr2_v4l_wm8775 {
struct pvr2_i2c_handler handler;
struct pvr2_i2c_client *client;
struct pvr2_hdw *hdw;
unsigned long stale_mask;
};
static void set_input(struct pvr2_v4l_wm8775 *ctxt)
{
struct v4l2_routing route;
struct pvr2_hdw *hdw = ctxt->hdw;
int msk = 0;
memset(&route,0,sizeof(route));
pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d msk=0x%x)",
hdw->input_val,msk);
// Always point to input #1 no matter what
route.input = 2;
pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
}
static int check_input(struct pvr2_v4l_wm8775 *ctxt)
{
struct pvr2_hdw *hdw = ctxt->hdw;
return hdw->input_dirty != 0;
}
struct pvr2_v4l_wm8775_ops {
void (*update)(struct pvr2_v4l_wm8775 *);
int (*check)(struct pvr2_v4l_wm8775 *);
};
static const struct pvr2_v4l_wm8775_ops wm8775_ops[] = {
{ .update = set_input, .check = check_input},
};
static unsigned int wm8775_describe(struct pvr2_v4l_wm8775 *ctxt,
char *buf,unsigned int cnt)
{
return scnprintf(buf,cnt,"handler: pvrusb2-wm8775");
}
static void wm8775_detach(struct pvr2_v4l_wm8775 *ctxt)
{
ctxt->client->handler = NULL;
kfree(ctxt);
}
static int wm8775_check(struct pvr2_v4l_wm8775 *ctxt)
{
unsigned long msk;
unsigned int idx;
for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]);
idx++) {
msk = 1 << idx;
if (ctxt->stale_mask & msk) continue;
if (wm8775_ops[idx].check(ctxt)) {
ctxt->stale_mask |= msk;
}
}
return ctxt->stale_mask != 0;
}
static void wm8775_update(struct pvr2_v4l_wm8775 *ctxt)
{
unsigned long msk;
unsigned int idx;
for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]);
idx++) {
msk = 1 << idx;
if (!(ctxt->stale_mask & msk)) continue;
ctxt->stale_mask &= ~msk;
wm8775_ops[idx].update(ctxt);
}
}
const static struct pvr2_i2c_handler_functions hfuncs = {
.detach = (void (*)(void *))wm8775_detach,
.check = (int (*)(void *))wm8775_check,
.update = (void (*)(void *))wm8775_update,
.describe = (unsigned int (*)(void *,char *,unsigned int))wm8775_describe,
};
int pvr2_i2c_wm8775_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
{
struct pvr2_v4l_wm8775 *ctxt;
if (cp->handler) return 0;
ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
if (!ctxt) return 0;
memset(ctxt,0,sizeof(*ctxt));
ctxt->handler.func_data = ctxt;
ctxt->handler.func_table = &hfuncs;
ctxt->client = cp;
ctxt->hdw = hdw;
ctxt->stale_mask = (1 << (sizeof(wm8775_ops)/
sizeof(wm8775_ops[0]))) - 1;
cp->handler = &ctxt->handler;
pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x wm8775 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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