This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / media / video / pvrusb2 / pvrusb2-wm8775.c

diff --git a/drivers/media/video/pvrusb2/pvrusb2-wm8775.c b/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
new file mode 100644 (file)
index 0000000..2413e51
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
@@ -0,0 +1,170 @@
+/*
+ *
+ *  $Id$
+ *
+ *  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_routing route;
+       struct pvr2_hdw *hdw = ctxt->hdw;
+       int msk = 0;
+
+       memset(&route,0,sizeof(route));
+
+       pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d msk=0x%x)",
+                  hdw->input_val,msk);
+
+       // Always point to input #1 no matter what
+       route.input = 2;
+       pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
+}
+
+static int check_input(struct pvr2_v4l_wm8775 *ctxt)
+{
+       struct pvr2_hdw *hdw = ctxt->hdw;
+       return hdw->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 = NULL;
+       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: ***
+  */