f5174af201
The exact routing of video and audio signals within a device is a device-specific attribute. Hauppauge devices do it one way; other types of device may route things differently. Unfortunately it is rather impractical to define chip-specific routing at the device attribute level, so instead what happens here is that "schemes" are defined. Each chip level interface implements its part of a given scheme and the scheme as a whole is made into a device specific attribute controlled via a table entry in pvrusb2-devattr.c. The only scheme defined here is for Hauppauge devices, but clearly this opens the door for other possibilities to follow. Signed-off-by: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
259 lines
6.2 KiB
C
259 lines
6.2 KiB
C
/*
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*
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* $Id$
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*
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* Copyright (C) 2005 Mike Isely <isely@pobox.com>
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* Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*
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This source file is specifically designed to interface with the
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saa711x support that is available in the v4l available starting
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with linux 2.6.15.
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*/
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#include "pvrusb2-video-v4l.h"
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#include "pvrusb2-i2c-cmd-v4l2.h"
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#include "pvrusb2-hdw-internal.h"
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#include "pvrusb2-debug.h"
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <media/saa7115.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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struct pvr2_v4l_decoder {
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struct pvr2_i2c_handler handler;
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struct pvr2_decoder_ctrl ctrl;
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struct pvr2_i2c_client *client;
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struct pvr2_hdw *hdw;
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unsigned long stale_mask;
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};
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struct routing_scheme {
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const int *def;
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unsigned int cnt;
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};
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static const int routing_scheme0[] = {
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[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
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/* In radio mode, we mute the video, but point at one
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spot just to stay consistent */
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[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
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[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
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[PVR2_CVAL_INPUT_SVIDEO] = SAA7115_SVIDEO2,
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};
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static const struct routing_scheme routing_schemes[] = {
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[PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
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.def = routing_scheme0,
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.cnt = ARRAY_SIZE(routing_scheme0),
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},
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};
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static void set_input(struct pvr2_v4l_decoder *ctxt)
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{
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struct pvr2_hdw *hdw = ctxt->hdw;
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struct v4l2_routing route;
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const struct routing_scheme *sp;
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unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
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pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);
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if ((sid < ARRAY_SIZE(routing_schemes)) &&
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((sp = routing_schemes + sid) != 0) &&
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(hdw->input_val >= 0) &&
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(hdw->input_val < sp->cnt)) {
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route.input = sp->def[hdw->input_val];
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} else {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"*** WARNING *** i2c v4l2 set_input:"
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" Invalid routing scheme (%u) and/or input (%d)",
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sid,hdw->input_val);
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return;
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}
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route.output = 0;
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pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
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}
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static int check_input(struct pvr2_v4l_decoder *ctxt)
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{
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struct pvr2_hdw *hdw = ctxt->hdw;
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return hdw->input_dirty != 0;
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}
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static void set_audio(struct pvr2_v4l_decoder *ctxt)
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{
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u32 val;
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struct pvr2_hdw *hdw = ctxt->hdw;
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pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d",
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hdw->srate_val);
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switch (hdw->srate_val) {
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default:
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case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
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val = 48000;
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break;
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case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
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val = 44100;
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break;
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case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
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val = 32000;
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break;
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}
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pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
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}
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static int check_audio(struct pvr2_v4l_decoder *ctxt)
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{
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struct pvr2_hdw *hdw = ctxt->hdw;
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return hdw->srate_dirty != 0;
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}
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struct pvr2_v4l_decoder_ops {
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void (*update)(struct pvr2_v4l_decoder *);
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int (*check)(struct pvr2_v4l_decoder *);
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};
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static const struct pvr2_v4l_decoder_ops decoder_ops[] = {
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{ .update = set_input, .check = check_input},
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{ .update = set_audio, .check = check_audio},
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};
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static void decoder_detach(struct pvr2_v4l_decoder *ctxt)
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{
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ctxt->client->handler = NULL;
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pvr2_hdw_set_decoder(ctxt->hdw,NULL);
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kfree(ctxt);
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}
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static int decoder_check(struct pvr2_v4l_decoder *ctxt)
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{
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unsigned long msk;
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unsigned int idx;
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for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
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msk = 1 << idx;
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if (ctxt->stale_mask & msk) continue;
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if (decoder_ops[idx].check(ctxt)) {
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ctxt->stale_mask |= msk;
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}
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}
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return ctxt->stale_mask != 0;
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}
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static void decoder_update(struct pvr2_v4l_decoder *ctxt)
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{
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unsigned long msk;
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unsigned int idx;
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for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
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msk = 1 << idx;
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if (!(ctxt->stale_mask & msk)) continue;
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ctxt->stale_mask &= ~msk;
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decoder_ops[idx].update(ctxt);
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}
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}
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static int decoder_detect(struct pvr2_i2c_client *cp)
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{
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/* Attempt to query the decoder - let's see if it will answer */
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struct v4l2_tuner vt;
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int ret;
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memset(&vt,0,sizeof(vt));
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ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt);
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return ret == 0; /* Return true if it answered */
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}
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static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl)
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{
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pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl);
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pvr2_v4l2_cmd_stream(ctxt->client,fl);
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}
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static unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt)
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{
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return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l");
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}
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static const struct pvr2_i2c_handler_functions hfuncs = {
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.detach = (void (*)(void *))decoder_detach,
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.check = (int (*)(void *))decoder_check,
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.update = (void (*)(void *))decoder_update,
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.describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
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};
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int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
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struct pvr2_i2c_client *cp)
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{
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struct pvr2_v4l_decoder *ctxt;
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if (hdw->decoder_ctrl) return 0;
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if (cp->handler) return 0;
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if (!decoder_detect(cp)) return 0;
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ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
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if (!ctxt) return 0;
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ctxt->handler.func_data = ctxt;
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ctxt->handler.func_table = &hfuncs;
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ctxt->ctrl.ctxt = ctxt;
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ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
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ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
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ctxt->client = cp;
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ctxt->hdw = hdw;
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ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
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pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
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cp->handler = &ctxt->handler;
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pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
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cp->client->addr);
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return !0;
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}
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/*
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Stuff for Emacs to see, in order to encourage consistent editing style:
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*** Local Variables: ***
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*** mode: c ***
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*** fill-column: 70 ***
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*** tab-width: 8 ***
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*** c-basic-offset: 8 ***
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*** End: ***
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*/
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