Merge git://git.kernel.org/pub/scm/linux/kernel/git/jk/spufs
[linux-2.6] / drivers / media / video / pvrusb2 / pvrusb2-audio.c
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
30 struct pvr2_msp3400_handler {
31         struct pvr2_hdw *hdw;
32         struct pvr2_i2c_client *client;
33         struct pvr2_i2c_handler i2c_handler;
34         unsigned long stale_mask;
35 };
36
37
38
39 struct routing_scheme {
40         const int *def;
41         unsigned int cnt;
42 };
43
44 static const int routing_scheme0[] = {
45         [PVR2_CVAL_INPUT_TV]        = MSP_INPUT_DEFAULT,
46         [PVR2_CVAL_INPUT_RADIO]     = MSP_INPUT(MSP_IN_SCART2,
47                                                 MSP_IN_TUNER1,
48                                                 MSP_DSP_IN_SCART,
49                                                 MSP_DSP_IN_SCART),
50         [PVR2_CVAL_INPUT_COMPOSITE] = MSP_INPUT(MSP_IN_SCART1,
51                                                 MSP_IN_TUNER1,
52                                                 MSP_DSP_IN_SCART,
53                                                 MSP_DSP_IN_SCART),
54         [PVR2_CVAL_INPUT_SVIDEO]    = MSP_INPUT(MSP_IN_SCART1,
55                                                 MSP_IN_TUNER1,
56                                                 MSP_DSP_IN_SCART,
57                                                 MSP_DSP_IN_SCART),
58 };
59
60 static const struct routing_scheme routing_schemes[] = {
61         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
62                 .def = routing_scheme0,
63                 .cnt = ARRAY_SIZE(routing_scheme0),
64         },
65 };
66
67 /* This function selects the correct audio input source */
68 static void set_stereo(struct pvr2_msp3400_handler *ctxt)
69 {
70         struct pvr2_hdw *hdw = ctxt->hdw;
71         struct v4l2_routing route;
72         const struct routing_scheme *sp;
73         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
74
75         pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
76
77         if ((sid < ARRAY_SIZE(routing_schemes)) &&
78             ((sp = routing_schemes + sid) != NULL) &&
79             (hdw->input_val >= 0) &&
80             (hdw->input_val < sp->cnt)) {
81                 route.input = sp->def[hdw->input_val];
82         } else {
83                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
84                            "*** WARNING *** i2c msp3400 v4l2 set_stereo:"
85                            " Invalid routing scheme (%u) and/or input (%d)",
86                            sid,hdw->input_val);
87                 return;
88         }
89         route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
90         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
91 }
92
93
94 static int check_stereo(struct pvr2_msp3400_handler *ctxt)
95 {
96         struct pvr2_hdw *hdw = ctxt->hdw;
97         return hdw->input_dirty;
98 }
99
100
101 struct pvr2_msp3400_ops {
102         void (*update)(struct pvr2_msp3400_handler *);
103         int (*check)(struct pvr2_msp3400_handler *);
104 };
105
106
107 static const struct pvr2_msp3400_ops msp3400_ops[] = {
108         { .update = set_stereo, .check = check_stereo},
109 };
110
111
112 static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
113 {
114         unsigned long msk;
115         unsigned int idx;
116
117         for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
118                 msk = 1 << idx;
119                 if (ctxt->stale_mask & msk) continue;
120                 if (msp3400_ops[idx].check(ctxt)) {
121                         ctxt->stale_mask |= msk;
122                 }
123         }
124         return ctxt->stale_mask != 0;
125 }
126
127
128 static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
129 {
130         unsigned long msk;
131         unsigned int idx;
132
133         for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
134                 msk = 1 << idx;
135                 if (!(ctxt->stale_mask & msk)) continue;
136                 ctxt->stale_mask &= ~msk;
137                 msp3400_ops[idx].update(ctxt);
138         }
139 }
140
141
142 static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
143 {
144         ctxt->client->handler = NULL;
145         kfree(ctxt);
146 }
147
148
149 static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
150                                           char *buf,unsigned int cnt)
151 {
152         return scnprintf(buf,cnt,"handler: pvrusb2-audio v4l2");
153 }
154
155
156 static const struct pvr2_i2c_handler_functions msp3400_funcs = {
157         .detach = (void (*)(void *))pvr2_msp3400_detach,
158         .check = (int (*)(void *))msp3400_check,
159         .update = (void (*)(void *))msp3400_update,
160         .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
161 };
162
163
164 int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
165 {
166         struct pvr2_msp3400_handler *ctxt;
167         if (cp->handler) return 0;
168
169         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
170         if (!ctxt) return 0;
171
172         ctxt->i2c_handler.func_data = ctxt;
173         ctxt->i2c_handler.func_table = &msp3400_funcs;
174         ctxt->client = cp;
175         ctxt->hdw = hdw;
176         ctxt->stale_mask = (1 << ARRAY_SIZE(msp3400_ops)) - 1;
177         cp->handler = &ctxt->i2c_handler;
178         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L2 handler set up",
179                    cp->client->addr);
180         return !0;
181 }
182
183
184 /*
185   Stuff for Emacs to see, in order to encourage consistent editing style:
186   *** Local Variables: ***
187   *** mode: c ***
188   *** fill-column: 70 ***
189   *** tab-width: 8 ***
190   *** c-basic-offset: 8 ***
191   *** End: ***
192   */