5 * Copyright (C) 2005 Mike Isely <isely@pobox.com>
6 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
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
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.
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
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>
30 struct pvr2_msp3400_handler {
32 struct pvr2_i2c_client *client;
33 struct pvr2_i2c_handler i2c_handler;
34 unsigned long stale_mask;
38 /* This function selects the correct audio input source */
39 static void set_stereo(struct pvr2_msp3400_handler *ctxt)
41 struct pvr2_hdw *hdw = ctxt->hdw;
42 struct v4l2_routing route;
44 pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
46 route.input = MSP_INPUT_DEFAULT;
47 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
48 switch (hdw->input_val) {
49 case PVR2_CVAL_INPUT_TV:
51 case PVR2_CVAL_INPUT_RADIO:
52 /* Assume that msp34xx also handle FM decoding, in which case
53 we're still using the tuner. */
54 /* HV: actually it is more likely to be the SCART2 input if
55 the ivtv experience is any indication. */
56 route.input = MSP_INPUT(MSP_IN_SCART2, MSP_IN_TUNER1,
57 MSP_DSP_IN_SCART, MSP_DSP_IN_SCART);
59 case PVR2_CVAL_INPUT_SVIDEO:
60 case PVR2_CVAL_INPUT_COMPOSITE:
62 route.input = MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1,
63 MSP_DSP_IN_SCART, MSP_DSP_IN_SCART);
66 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
70 static int check_stereo(struct pvr2_msp3400_handler *ctxt)
72 struct pvr2_hdw *hdw = ctxt->hdw;
73 return hdw->input_dirty;
77 struct pvr2_msp3400_ops {
78 void (*update)(struct pvr2_msp3400_handler *);
79 int (*check)(struct pvr2_msp3400_handler *);
83 static const struct pvr2_msp3400_ops msp3400_ops[] = {
84 { .update = set_stereo, .check = check_stereo},
88 static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
93 for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
95 if (ctxt->stale_mask & msk) continue;
96 if (msp3400_ops[idx].check(ctxt)) {
97 ctxt->stale_mask |= msk;
100 return ctxt->stale_mask != 0;
104 static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
109 for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
111 if (!(ctxt->stale_mask & msk)) continue;
112 ctxt->stale_mask &= ~msk;
113 msp3400_ops[idx].update(ctxt);
118 static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
120 ctxt->client->handler = NULL;
125 static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
126 char *buf,unsigned int cnt)
128 return scnprintf(buf,cnt,"handler: pvrusb2-audio v4l2");
132 static const struct pvr2_i2c_handler_functions msp3400_funcs = {
133 .detach = (void (*)(void *))pvr2_msp3400_detach,
134 .check = (int (*)(void *))msp3400_check,
135 .update = (void (*)(void *))msp3400_update,
136 .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
140 int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
142 struct pvr2_msp3400_handler *ctxt;
143 if (cp->handler) return 0;
145 ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
148 ctxt->i2c_handler.func_data = ctxt;
149 ctxt->i2c_handler.func_table = &msp3400_funcs;
152 ctxt->stale_mask = (1 << ARRAY_SIZE(msp3400_ops)) - 1;
153 cp->handler = &ctxt->i2c_handler;
154 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L2 handler set up",
161 Stuff for Emacs to see, in order to encourage consistent editing style:
162 *** Local Variables: ***
164 *** fill-column: 70 ***
166 *** c-basic-offset: 8 ***