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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 | struct pvr2_audio_stat astat; | |
35 | unsigned long stale_mask; | |
36 | }; | |
37 | ||
38 | ||
39 | /* This function selects the correct audio input source */ | |
40 | static 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 | ||
78 | static 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 | ||
86 | struct pvr2_msp3400_ops { | |
87 | void (*update)(struct pvr2_msp3400_handler *); | |
88 | int (*check)(struct pvr2_msp3400_handler *); | |
89 | }; | |
90 | ||
91 | ||
92 | static const struct pvr2_msp3400_ops msp3400_ops[] = { | |
93 | { .update = set_stereo, .check = check_stereo}, | |
94 | }; | |
95 | ||
96 | ||
97 | static 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 | ||
114 | static 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 */ | |
130 | static 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 | ||
146 | static 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 | ||
154 | static 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 | ||
161 | const 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 | ||
169 | int 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 | */ |