1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/media/video/ivtv/ivtv-audio.c b/drivers/media/video/ivtv/ivtv-audio.c
new file mode 100644
index 000000000000..d702b8b539a1
--- /dev/null
+++ b/drivers/media/video/ivtv/ivtv-audio.c
@@ -0,0 +1,74 @@
+/*
+    Audio-related ivtv functions.
+    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
+    Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
+
+    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, or
+    (at your option) any later version.
+
+    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 "ivtv-driver.h"
+#include "ivtv-mailbox.h"
+#include "ivtv-i2c.h"
+#include "ivtv-gpio.h"
+#include "ivtv-cards.h"
+#include "ivtv-audio.h"
+#include <media/msp3400.h>
+#include <linux/videodev.h>
+
+/* Selects the audio input and output according to the current
+   settings. */
+int ivtv_audio_set_io(struct ivtv *itv)
+{
+        struct v4l2_routing route;
+        u32 audio_input;
+        int mux_input;
+
+        /* Determine which input to use */
+        if (test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
+                audio_input = itv->card->radio_input.audio_input;
+                mux_input = itv->card->radio_input.muxer_input;
+        } else {
+                audio_input = itv->card->audio_inputs[itv->audio_input].audio_input;
+                mux_input = itv->card->audio_inputs[itv->audio_input].muxer_input;
+        }
+
+        /* handle muxer chips */
+        route.input = mux_input;
+        route.output = 0;
+        ivtv_i2c_hw(itv, itv->card->hw_muxer, VIDIOC_INT_S_AUDIO_ROUTING, &route);
+
+        route.input = audio_input;
+        if (itv->card->hw_audio & IVTV_HW_MSP34XX) {
+                route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
+        }
+        return ivtv_i2c_hw(itv, itv->card->hw_audio, VIDIOC_INT_S_AUDIO_ROUTING, &route);
+}
+
+void ivtv_audio_set_route(struct ivtv *itv, struct v4l2_routing *route)
+{
+        ivtv_i2c_hw(itv, itv->card->hw_audio, VIDIOC_INT_S_AUDIO_ROUTING, route);
+}
+
+void ivtv_audio_set_audio_clock_freq(struct ivtv *itv, u8 freq)
+{
+        static u32 freqs[3] = { 44100, 48000, 32000 };
+
+        /* The audio clock of the digitizer must match the codec sample
+           rate otherwise you get some very strange effects. */
+        if (freq > 2)
+                return;
+        ivtv_call_i2c_clients(itv, VIDIOC_INT_AUDIO_CLOCK_FREQ, &freqs[freq]);
+}
+