[media] rename most media/video pci drivers to media/pci

[sfrench/cifs-2.6.git] / drivers / media / pci / cx18 / cx18-audio.c

diff --git a/drivers/media/pci/cx18/cx18-audio.c b/drivers/media/pci/cx18/cx18-audio.c
new file mode 100644 (file)
index 0000000..3526892
--- /dev/null
+++ b/drivers/media/pci/cx18/cx18-audio.c
@@ -0,0 +1,92 @@
+/*
+ *  cx18 audio-related functions
+ *
+ *  Derived from ivtv-audio.c
+ *
+ *  Copyright (C) 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 "cx18-driver.h"
+#include "cx18-io.h"
+#include "cx18-cards.h"
+#include "cx18-audio.h"
+
+#define CX18_AUDIO_ENABLE    0xc72014
+#define CX18_AI1_MUX_MASK    0x30
+#define CX18_AI1_MUX_I2S1    0x00
+#define CX18_AI1_MUX_I2S2    0x10
+#define CX18_AI1_MUX_843_I2S 0x20
+
+/* Selects the audio input and output according to the current
+   settings. */
+int cx18_audio_set_io(struct cx18 *cx)
+{
+       const struct cx18_card_audio_input *in;
+       u32 u, v;
+       int err;
+
+       /* Determine which input to use */
+       if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
+               in = &cx->card->radio_input;
+       else
+               in = &cx->card->audio_inputs[cx->audio_input];
+
+       /* handle muxer chips */
+       v4l2_subdev_call(cx->sd_extmux, audio, s_routing,
+                        (u32) in->muxer_input, 0, 0);
+
+       err = cx18_call_hw_err(cx, cx->card->hw_audio_ctrl,
+                              audio, s_routing, in->audio_input, 0, 0);
+       if (err)
+               return err;
+
+       /* FIXME - this internal mux should be abstracted to a subdev */
+       u = cx18_read_reg(cx, CX18_AUDIO_ENABLE);
+       v = u & ~CX18_AI1_MUX_MASK;
+       switch (in->audio_input) {
+       case CX18_AV_AUDIO_SERIAL1:
+               v |= CX18_AI1_MUX_I2S1;
+               break;
+       case CX18_AV_AUDIO_SERIAL2:
+               v |= CX18_AI1_MUX_I2S2;
+               break;
+       default:
+               v |= CX18_AI1_MUX_843_I2S;
+               break;
+       }
+       if (v == u) {
+               /* force a toggle of some AI1 MUX control bits */
+               u &= ~CX18_AI1_MUX_MASK;
+               switch (in->audio_input) {
+               case CX18_AV_AUDIO_SERIAL1:
+                       u |= CX18_AI1_MUX_843_I2S;
+                       break;
+               case CX18_AV_AUDIO_SERIAL2:
+                       u |= CX18_AI1_MUX_843_I2S;
+                       break;
+               default:
+                       u |= CX18_AI1_MUX_I2S1;
+                       break;
+               }
+               cx18_write_reg_expect(cx, u | 0xb00, CX18_AUDIO_ENABLE,
+                                     u, CX18_AI1_MUX_MASK);
+       }
+       cx18_write_reg_expect(cx, v | 0xb00, CX18_AUDIO_ENABLE,
+                             v, CX18_AI1_MUX_MASK);
+       return 0;
+}