5 * Copyright (C) 2005 Mike Isely <isely@pobox.com>
6 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 This source file is specifically designed to interface with the
30 #include "pvrusb2-wm8775.h"
31 #include "pvrusb2-i2c-cmd-v4l2.h"
34 #include "pvrusb2-hdw-internal.h"
35 #include "pvrusb2-debug.h"
36 #include <linux/videodev2.h>
37 #include <media/v4l2-common.h>
38 #include <linux/errno.h>
39 #include <linux/slab.h>
41 struct pvr2_v4l_wm8775 {
42 struct pvr2_i2c_handler handler;
43 struct pvr2_i2c_client *client;
45 unsigned long stale_mask;
49 static void set_input(struct pvr2_v4l_wm8775 *ctxt)
51 struct v4l2_routing route;
52 struct pvr2_hdw *hdw = ctxt->hdw;
55 memset(&route,0,sizeof(route));
57 pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d msk=0x%x)",
60 // Always point to input #1 no matter what
62 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
65 static int check_input(struct pvr2_v4l_wm8775 *ctxt)
67 struct pvr2_hdw *hdw = ctxt->hdw;
68 return hdw->input_dirty != 0;
72 struct pvr2_v4l_wm8775_ops {
73 void (*update)(struct pvr2_v4l_wm8775 *);
74 int (*check)(struct pvr2_v4l_wm8775 *);
78 static const struct pvr2_v4l_wm8775_ops wm8775_ops[] = {
79 { .update = set_input, .check = check_input},
83 static unsigned int wm8775_describe(struct pvr2_v4l_wm8775 *ctxt,
84 char *buf,unsigned int cnt)
86 return scnprintf(buf,cnt,"handler: pvrusb2-wm8775");
90 static void wm8775_detach(struct pvr2_v4l_wm8775 *ctxt)
92 ctxt->client->handler = NULL;
97 static int wm8775_check(struct pvr2_v4l_wm8775 *ctxt)
102 for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]);
105 if (ctxt->stale_mask & msk) continue;
106 if (wm8775_ops[idx].check(ctxt)) {
107 ctxt->stale_mask |= msk;
110 return ctxt->stale_mask != 0;
114 static void wm8775_update(struct pvr2_v4l_wm8775 *ctxt)
119 for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]);
122 if (!(ctxt->stale_mask & msk)) continue;
123 ctxt->stale_mask &= ~msk;
124 wm8775_ops[idx].update(ctxt);
129 const static struct pvr2_i2c_handler_functions hfuncs = {
130 .detach = (void (*)(void *))wm8775_detach,
131 .check = (int (*)(void *))wm8775_check,
132 .update = (void (*)(void *))wm8775_update,
133 .describe = (unsigned int (*)(void *,char *,unsigned int))wm8775_describe,
137 int pvr2_i2c_wm8775_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
139 struct pvr2_v4l_wm8775 *ctxt;
141 if (cp->handler) return 0;
143 ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
145 memset(ctxt,0,sizeof(*ctxt));
147 ctxt->handler.func_data = ctxt;
148 ctxt->handler.func_table = &hfuncs;
151 ctxt->stale_mask = (1 << (sizeof(wm8775_ops)/
152 sizeof(wm8775_ops[0]))) - 1;
153 cp->handler = &ctxt->handler;
154 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x wm8775 V4L2 handler set up",
163 Stuff for Emacs to see, in order to encourage consistent editing style:
164 *** Local Variables: ***
166 *** fill-column: 70 ***
168 *** c-basic-offset: 8 ***