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) != 0) &&
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 */
193
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