Merge branch 'linus' into oprofile
[linux-2.6] / drivers / media / video / pvrusb2 / pvrusb2-audio.c
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 #include "pvrusb2-audio.h"
23 #include "pvrusb2-hdw-internal.h"
24 #include "pvrusb2-debug.h"
25 #include <linux/videodev2.h>
26 #include <media/msp3400.h>
27 #include <media/v4l2-common.h>
28
29 struct pvr2_msp3400_handler {
30         struct pvr2_hdw *hdw;
31         struct pvr2_i2c_client *client;
32         struct pvr2_i2c_handler i2c_handler;
33         unsigned long stale_mask;
34 };
35
36
37
38 struct routing_scheme {
39         const int *def;
40         unsigned int cnt;
41 };
42
43 static const int routing_scheme0[] = {
44         [PVR2_CVAL_INPUT_TV]        = MSP_INPUT_DEFAULT,
45         [PVR2_CVAL_INPUT_RADIO]     = MSP_INPUT(MSP_IN_SCART2,
46                                                 MSP_IN_TUNER1,
47                                                 MSP_DSP_IN_SCART,
48                                                 MSP_DSP_IN_SCART),
49         [PVR2_CVAL_INPUT_COMPOSITE] = MSP_INPUT(MSP_IN_SCART1,
50                                                 MSP_IN_TUNER1,
51                                                 MSP_DSP_IN_SCART,
52                                                 MSP_DSP_IN_SCART),
53         [PVR2_CVAL_INPUT_SVIDEO]    = MSP_INPUT(MSP_IN_SCART1,
54                                                 MSP_IN_TUNER1,
55                                                 MSP_DSP_IN_SCART,
56                                                 MSP_DSP_IN_SCART),
57 };
58
59 static const struct routing_scheme routing_schemes[] = {
60         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
61                 .def = routing_scheme0,
62                 .cnt = ARRAY_SIZE(routing_scheme0),
63         },
64 };
65
66 /* This function selects the correct audio input source */
67 static void set_stereo(struct pvr2_msp3400_handler *ctxt)
68 {
69         struct pvr2_hdw *hdw = ctxt->hdw;
70         struct v4l2_routing route;
71         const struct routing_scheme *sp;
72         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
73
74         pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
75
76         if ((sid < ARRAY_SIZE(routing_schemes)) &&
77             ((sp = routing_schemes + sid) != NULL) &&
78             (hdw->input_val >= 0) &&
79             (hdw->input_val < sp->cnt)) {
80                 route.input = sp->def[hdw->input_val];
81         } else {
82                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
83                            "*** WARNING *** i2c msp3400 v4l2 set_stereo:"
84                            " Invalid routing scheme (%u) and/or input (%d)",
85                            sid,hdw->input_val);
86                 return;
87         }
88         route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
89         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
90 }
91
92
93 static int check_stereo(struct pvr2_msp3400_handler *ctxt)
94 {
95         struct pvr2_hdw *hdw = ctxt->hdw;
96         return hdw->input_dirty;
97 }
98
99
100 struct pvr2_msp3400_ops {
101         void (*update)(struct pvr2_msp3400_handler *);
102         int (*check)(struct pvr2_msp3400_handler *);
103 };
104
105
106 static const struct pvr2_msp3400_ops msp3400_ops[] = {
107         { .update = set_stereo, .check = check_stereo},
108 };
109
110
111 static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
112 {
113         unsigned long msk;
114         unsigned int idx;
115
116         for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
117                 msk = 1 << idx;
118                 if (ctxt->stale_mask & msk) continue;
119                 if (msp3400_ops[idx].check(ctxt)) {
120                         ctxt->stale_mask |= msk;
121                 }
122         }
123         return ctxt->stale_mask != 0;
124 }
125
126
127 static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
128 {
129         unsigned long msk;
130         unsigned int idx;
131
132         for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
133                 msk = 1 << idx;
134                 if (!(ctxt->stale_mask & msk)) continue;
135                 ctxt->stale_mask &= ~msk;
136                 msp3400_ops[idx].update(ctxt);
137         }
138 }
139
140
141 static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
142 {
143         ctxt->client->handler = NULL;
144         kfree(ctxt);
145 }
146
147
148 static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
149                                           char *buf,unsigned int cnt)
150 {
151         return scnprintf(buf,cnt,"handler: pvrusb2-audio v4l2");
152 }
153
154
155 static const struct pvr2_i2c_handler_functions msp3400_funcs = {
156         .detach = (void (*)(void *))pvr2_msp3400_detach,
157         .check = (int (*)(void *))msp3400_check,
158         .update = (void (*)(void *))msp3400_update,
159         .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
160 };
161
162
163 int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
164 {
165         struct pvr2_msp3400_handler *ctxt;
166         if (cp->handler) return 0;
167
168         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
169         if (!ctxt) return 0;
170
171         ctxt->i2c_handler.func_data = ctxt;
172         ctxt->i2c_handler.func_table = &msp3400_funcs;
173         ctxt->client = cp;
174         ctxt->hdw = hdw;
175         ctxt->stale_mask = (1 << ARRAY_SIZE(msp3400_ops)) - 1;
176         cp->handler = &ctxt->i2c_handler;
177         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L2 handler set up",
178                    cp->client->addr);
179         return !0;
180 }
181
182
183 /*
184   Stuff for Emacs to see, in order to encourage consistent editing style:
185   *** Local Variables: ***
186   *** mode: c ***
187   *** fill-column: 70 ***
188   *** tab-width: 8 ***
189   *** c-basic-offset: 8 ***
190   *** End: ***
191   */