1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
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 = 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: ***
*/
|
