Integrate pvrusb2 with wm8775

From: Mike Isely <isely@pobox.com>

Implement new logic in pvrusb2 to operate wm8775, which is needed for
new model 24xxx hardware which has a wm8775 inside it (which is used
to digitize audio from composite and s-video input).

Signed-off-by: Mike Isely <isely@pobox.com>

3 files changed, 231 insertions, 0 deletions

diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c b/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
index 897e74d42..fc9d76792 100644
--- a/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
+++ b/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
@@ -29,6 +29,7 @@
 #include "pvrusb2-demod.h"
 #include "pvrusb2-video-v4l.h"
 #include "pvrusb2-cx2584x-v4l.h"
+#include "pvrusb2-wm8775.h"
 
 #define trace_i2c(...) pvr2_trace(PVR2_TRACE_I2C,__VA_ARGS__)
 
@@ -75,6 +76,11 @@ void pvr2_i2c_probe(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
 			return;
 		}
 	}
+	if (id == I2C_DRIVERID_WM8775) {
+		if (pvr2_i2c_wm8775_setup(hdw,cp)) {
+			return;
+		}
+	}
 	if (id == I2C_DRIVERID_SAA711X) {
 		if (pvr2_i2c_decoder_v4l_setup(hdw,cp)) {
 			return;
diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-wm8775.c b/linux/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
new file mode 100644
index 000000000..79334980c
--- /dev/null
+++ b/linux/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
@@ -0,0 +1,171 @@
+/*
+ *
+ *  $Id$
+ *
+ *  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_audio inp;
+	struct pvr2_hdw *hdw = ctxt->hdw;
+	int msk = 0;
+
+	memset(&inp,0,sizeof(inp));
+
+	pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d msk=0x%x)",
+		   hdw->controls[PVR2_CID_INPUT].value,msk);
+
+	// Always point to input #1 no matter what
+	inp.index = 2;
+	pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_AUDIO,&inp);
+}
+
+
+static int check_input(struct pvr2_v4l_wm8775 *ctxt)
+{
+	struct pvr2_hdw *hdw = ctxt->hdw;
+	return hdw->controls[PVR2_CID_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 = 0;
+	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: ***
+  */
diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-wm8775.h b/linux/drivers/media/video/pvrusb2/pvrusb2-wm8775.h
new file mode 100644
index 000000000..15ee1e215
--- /dev/null
+++ b/linux/drivers/media/video/pvrusb2/pvrusb2-wm8775.h
@@ -0,0 +1,54 @@
+/*
+ *
+ *  $Id$
+ *
+ *  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
+ *
+ */
+
+#ifndef __PVRUSB2_WM8775_H
+#define __PVRUSB2_WM8775_H
+
+/*
+
+   This module connects the pvrusb2 driver to the I2C chip level
+   driver which performs analog -> digital audio conversion for
+   external audio inputs.  This interface is used internally by the
+   driver; higher level code should only interact through the
+   interface provided by pvrusb2-hdw.h.
+
+*/
+
+#include "compat.h"
+
+
+#include "pvrusb2-i2c-core.h"
+
+int pvr2_i2c_wm8775_setup(struct pvr2_hdw *,struct pvr2_i2c_client *);
+
+
+#endif /* __PVRUSB2_WM8775_H */
+
+/*
+  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: ***
+  */