1 /*
2 *
3 *
4 * Copyright (C) 2005 Mike Isely <isely@pobox.com>
5 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 /*
23
24 This source file is specifically designed to interface with the
25 wm8775.
26
27 */
28
29 #include "pvrusb2-wm8775.h"
30 #include "pvrusb2-i2c-cmd-v4l2.h"
31
32
33 #include "pvrusb2-hdw-internal.h"
34 #include "pvrusb2-debug.h"
35 #include <linux/videodev2.h>
36 #include <media/v4l2-common.h>
37 #include <linux/errno.h>
38 #include <linux/slab.h>
39
40 struct pvr2_v4l_wm8775 {
41 struct pvr2_i2c_handler handler;
42 struct pvr2_i2c_client *client;
43 struct pvr2_hdw *hdw;
44 unsigned long stale_mask;
45 };
46
47
set_input(struct pvr2_v4l_wm8775 * ctxt)48 static void set_input(struct pvr2_v4l_wm8775 *ctxt)
49 {
50 struct v4l2_routing route;
51 struct pvr2_hdw *hdw = ctxt->hdw;
52
53 memset(&route,0,sizeof(route));
54
55 switch(hdw->input_val) {
56 case PVR2_CVAL_INPUT_RADIO:
57 route.input = 1;
58 break;
59 default:
60 /* All other cases just use the second input */
61 route.input = 2;
62 break;
63 }
64 pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d route=0x%x)",
65 hdw->input_val,route.input);
66
67 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
68 }
69
check_input(struct pvr2_v4l_wm8775 * ctxt)70 static int check_input(struct pvr2_v4l_wm8775 *ctxt)
71 {
72 struct pvr2_hdw *hdw = ctxt->hdw;
73 return hdw->input_dirty != 0;
74 }
75
76
77 struct pvr2_v4l_wm8775_ops {
78 void (*update)(struct pvr2_v4l_wm8775 *);
79 int (*check)(struct pvr2_v4l_wm8775 *);
80 };
81
82
83 static const struct pvr2_v4l_wm8775_ops wm8775_ops[] = {
84 { .update = set_input, .check = check_input},
85 };
86
87
wm8775_describe(struct pvr2_v4l_wm8775 * ctxt,char * buf,unsigned int cnt)88 static unsigned int wm8775_describe(struct pvr2_v4l_wm8775 *ctxt,
89 char *buf,unsigned int cnt)
90 {
91 return scnprintf(buf,cnt,"handler: pvrusb2-wm8775");
92 }
93
94
wm8775_detach(struct pvr2_v4l_wm8775 * ctxt)95 static void wm8775_detach(struct pvr2_v4l_wm8775 *ctxt)
96 {
97 ctxt->client->handler = NULL;
98 kfree(ctxt);
99 }
100
101
wm8775_check(struct pvr2_v4l_wm8775 * ctxt)102 static int wm8775_check(struct pvr2_v4l_wm8775 *ctxt)
103 {
104 unsigned long msk;
105 unsigned int idx;
106
107 for (idx = 0; idx < ARRAY_SIZE(wm8775_ops); idx++) {
108 msk = 1 << idx;
109 if (ctxt->stale_mask & msk) continue;
110 if (wm8775_ops[idx].check(ctxt)) {
111 ctxt->stale_mask |= msk;
112 }
113 }
114 return ctxt->stale_mask != 0;
115 }
116
117
wm8775_update(struct pvr2_v4l_wm8775 * ctxt)118 static void wm8775_update(struct pvr2_v4l_wm8775 *ctxt)
119 {
120 unsigned long msk;
121 unsigned int idx;
122
123 for (idx = 0; idx < ARRAY_SIZE(wm8775_ops); idx++) {
124 msk = 1 << idx;
125 if (!(ctxt->stale_mask & msk)) continue;
126 ctxt->stale_mask &= ~msk;
127 wm8775_ops[idx].update(ctxt);
128 }
129 }
130
131
132 static const struct pvr2_i2c_handler_functions hfuncs = {
133 .detach = (void (*)(void *))wm8775_detach,
134 .check = (int (*)(void *))wm8775_check,
135 .update = (void (*)(void *))wm8775_update,
136 .describe = (unsigned int (*)(void *,char *,unsigned int))wm8775_describe,
137 };
138
139
pvr2_i2c_wm8775_setup(struct pvr2_hdw * hdw,struct pvr2_i2c_client * cp)140 int pvr2_i2c_wm8775_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
141 {
142 struct pvr2_v4l_wm8775 *ctxt;
143
144 if (cp->handler) return 0;
145
146 ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
147 if (!ctxt) return 0;
148
149 ctxt->handler.func_data = ctxt;
150 ctxt->handler.func_table = &hfuncs;
151 ctxt->client = cp;
152 ctxt->hdw = hdw;
153 ctxt->stale_mask = (1 << ARRAY_SIZE(wm8775_ops)) - 1;
154 cp->handler = &ctxt->handler;
155 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x wm8775 V4L2 handler set up",
156 cp->client->addr);
157 return !0;
158 }
159
160
161
162
163 /*
164 Stuff for Emacs to see, in order to encourage consistent editing style:
165 *** Local Variables: ***
166 *** mode: c ***
167 *** fill-column: 70 ***
168 *** tab-width: 8 ***
169 *** c-basic-offset: 8 ***
170 *** End: ***
171 */
172