aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/pvrusb2/pvrusb2-audio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-audio.c')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-audio.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-audio.c b/drivers/media/video/pvrusb2/pvrusb2-audio.c
new file mode 100644
index 000000000000..313d2dcf9e4b
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-audio.c
@@ -0,0 +1,204 @@
1/*
2 *
3 * $Id$
4 *
5 * Copyright (C) 2005 Mike Isely <isely@pobox.com>
6 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
7 *
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
11 *
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.
16 *
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
20 *
21 */
22
23#include "pvrusb2-audio.h"
24#include "pvrusb2-hdw-internal.h"
25#include "pvrusb2-debug.h"
26#include <linux/videodev2.h>
27#include <media/msp3400.h>
28#include <media/v4l2-common.h>
29
30struct pvr2_msp3400_handler {
31 struct pvr2_hdw *hdw;
32 struct pvr2_i2c_client *client;
33 struct pvr2_i2c_handler i2c_handler;
34 struct pvr2_audio_stat astat;
35 unsigned long stale_mask;
36};
37
38
39/* This function selects the correct audio input source */
40static void set_stereo(struct pvr2_msp3400_handler *ctxt)
41{
42 struct pvr2_hdw *hdw = ctxt->hdw;
43 struct v4l2_routing route;
44
45 pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
46
47 if (hdw->input_val == PVR2_CVAL_INPUT_TV) {
48 struct v4l2_tuner vt;
49 memset(&vt,0,sizeof(vt));
50 vt.audmode = hdw->audiomode_val;
51 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_TUNER,&vt);
52 }
53
54 route.input = MSP_INPUT_DEFAULT;
55 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
56 switch (hdw->input_val) {
57 case PVR2_CVAL_INPUT_TV:
58 break;
59 case PVR2_CVAL_INPUT_RADIO:
60 /* Assume that msp34xx also handle FM decoding, in which case
61 we're still using the tuner. */
62 /* HV: actually it is more likely to be the SCART2 input if
63 the ivtv experience is any indication. */
64 route.input = MSP_INPUT(MSP_IN_SCART2, MSP_IN_TUNER1,
65 MSP_DSP_IN_SCART, MSP_DSP_IN_SCART);
66 break;
67 case PVR2_CVAL_INPUT_SVIDEO:
68 case PVR2_CVAL_INPUT_COMPOSITE:
69 /* SCART 1 input */
70 route.input = MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1,
71 MSP_DSP_IN_SCART, MSP_DSP_IN_SCART);
72 break;
73 }
74 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
75}
76
77
78static int check_stereo(struct pvr2_msp3400_handler *ctxt)
79{
80 struct pvr2_hdw *hdw = ctxt->hdw;
81 return (hdw->input_dirty ||
82 hdw->audiomode_dirty);
83}
84
85
86struct pvr2_msp3400_ops {
87 void (*update)(struct pvr2_msp3400_handler *);
88 int (*check)(struct pvr2_msp3400_handler *);
89};
90
91
92static const struct pvr2_msp3400_ops msp3400_ops[] = {
93 { .update = set_stereo, .check = check_stereo},
94};
95
96
97static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
98{
99 unsigned long msk;
100 unsigned int idx;
101
102 for (idx = 0; idx < sizeof(msp3400_ops)/sizeof(msp3400_ops[0]);
103 idx++) {
104 msk = 1 << idx;
105 if (ctxt->stale_mask & msk) continue;
106 if (msp3400_ops[idx].check(ctxt)) {
107 ctxt->stale_mask |= msk;
108 }
109 }
110 return ctxt->stale_mask != 0;
111}
112
113
114static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
115{
116 unsigned long msk;
117 unsigned int idx;
118
119 for (idx = 0; idx < sizeof(msp3400_ops)/sizeof(msp3400_ops[0]);
120 idx++) {
121 msk = 1 << idx;
122 if (!(ctxt->stale_mask & msk)) continue;
123 ctxt->stale_mask &= ~msk;
124 msp3400_ops[idx].update(ctxt);
125 }
126}
127
128
129/* This reads back the current signal type */
130static int get_audio_status(struct pvr2_msp3400_handler *ctxt)
131{
132 struct v4l2_tuner vt;
133 int stat;
134
135 memset(&vt,0,sizeof(vt));
136 stat = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_G_TUNER,&vt);
137 if (stat < 0) return stat;
138
139 ctxt->hdw->flag_stereo = (vt.audmode & V4L2_TUNER_MODE_STEREO) != 0;
140 ctxt->hdw->flag_bilingual =
141 (vt.audmode & V4L2_TUNER_MODE_LANG2) != 0;
142 return 0;
143}
144
145
146static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
147{
148 ctxt->client->handler = 0;
149 ctxt->hdw->audio_stat = 0;
150 kfree(ctxt);
151}
152
153
154static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
155 char *buf,unsigned int cnt)
156{
157 return scnprintf(buf,cnt,"handler: pvrusb2-audio v4l2");
158}
159
160
161const static struct pvr2_i2c_handler_functions msp3400_funcs = {
162 .detach = (void (*)(void *))pvr2_msp3400_detach,
163 .check = (int (*)(void *))msp3400_check,
164 .update = (void (*)(void *))msp3400_update,
165 .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
166};
167
168
169int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
170{
171 struct pvr2_msp3400_handler *ctxt;
172 if (hdw->audio_stat) return 0;
173 if (cp->handler) return 0;
174
175 ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
176 if (!ctxt) return 0;
177 memset(ctxt,0,sizeof(*ctxt));
178
179 ctxt->i2c_handler.func_data = ctxt;
180 ctxt->i2c_handler.func_table = &msp3400_funcs;
181 ctxt->client = cp;
182 ctxt->hdw = hdw;
183 ctxt->astat.ctxt = ctxt;
184 ctxt->astat.status = (int (*)(void *))get_audio_status;
185 ctxt->astat.detach = (void (*)(void *))pvr2_msp3400_detach;
186 ctxt->stale_mask = (1 << (sizeof(msp3400_ops)/
187 sizeof(msp3400_ops[0]))) - 1;
188 cp->handler = &ctxt->i2c_handler;
189 hdw->audio_stat = &ctxt->astat;
190 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L2 handler set up",
191 cp->client->addr);
192 return !0;
193}
194
195
196/*
197 Stuff for Emacs to see, in order to encourage consistent editing style:
198 *** Local Variables: ***
199 *** mode: c ***
200 *** fill-column: 70 ***
201 *** tab-width: 8 ***
202 *** c-basic-offset: 8 ***
203 *** End: ***
204 */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-15 11:58:06 -0500