summaryrefslogtreecommitdiff
path: root/linux/drivers/media/video/pvrusb2/pvrusb2-audio.c
diff options
context:
space:
mode:
authorMichael Krufky <mkrufky@linuxtv.org>2006-02-26 00:55:22 -0400
committerMichael Krufky <mkrufky@linuxtv.org>2006-02-26 00:55:22 -0400
commit95b46b95fbbd8226ebaccd556a541aeb061aa980 (patch)
tree66b4fcce8bafe35621efc9102fcf3a6441551eeb /linux/drivers/media/video/pvrusb2/pvrusb2-audio.c
parentac4f762f0295fd5ae9bc953d4ec8648eaa763506 (diff)
downloadmediapointer-dvb-s2-95b46b95fbbd8226ebaccd556a541aeb061aa980.tar.gz
mediapointer-dvb-s2-95b46b95fbbd8226ebaccd556a541aeb061aa980.tar.bz2
moved pvrusb2 driver into the kernel tree
From: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Diffstat (limited to 'linux/drivers/media/video/pvrusb2/pvrusb2-audio.c')
-rw-r--r--linux/drivers/media/video/pvrusb2/pvrusb2-audio.c260
1 files changed, 260 insertions, 0 deletions
diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-audio.c b/linux/drivers/media/video/pvrusb2/pvrusb2-audio.c
new file mode 100644
index 000000000..7e2fab330
--- /dev/null
+++ b/linux/drivers/media/video/pvrusb2/pvrusb2-audio.c
@@ -0,0 +1,260 @@
+/*
+ *
+ * $Id$
+ *
+ * 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
+ *
+ */
+
+#include "compat.h"
+#include "pvrusb2-audio.h"
+#include "pvrusb2-hdw-internal.h"
+#include "pvrusb2-debug.h"
+#include "msp3400.h"
+#include <linux/videodev.h>
+#include <media/audiochip.h>
+#include <media/v4l2-common.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)||
+ (hdw->controls[PVR2_CID_AUDIOMODE].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);
+}
+
+
+static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
+ char *buf,unsigned int cnt)
+{
+ return scnprintf(buf,cnt,"handler: pvrusb2-audio");
+}
+
+
+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,
+ .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
+};
+
+
+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;
+ pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L1 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: ***
+ */