4 * Copyright (C) 2005 Mike Isely <isely@pobox.com>
5 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
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
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.
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
24 This source file is specifically designed to interface with the
25 saa711x support that is available in the v4l available starting
30 #include "pvrusb2-video-v4l.h"
31 #include "pvrusb2-i2c-cmd-v4l2.h"
34 #include "pvrusb2-hdw-internal.h"
35 #include "pvrusb2-debug.h"
36 #include <linux/videodev2.h>
37 #include <media/v4l2-common.h>
38 #include <media/saa7115.h>
39 #include <linux/errno.h>
40 #include <linux/slab.h>
42 struct pvr2_v4l_decoder {
43 struct pvr2_i2c_handler handler;
44 struct pvr2_decoder_ctrl ctrl;
45 struct pvr2_i2c_client *client;
47 unsigned long stale_mask;
51 struct routing_scheme {
57 static const int routing_scheme0[] = {
58 [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
59 /* In radio mode, we mute the video, but point at one
60 spot just to stay consistent */
61 [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
62 [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
63 [PVR2_CVAL_INPUT_SVIDEO] = SAA7115_SVIDEO2,
66 static const struct routing_scheme routing_schemes[] = {
67 [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
68 .def = routing_scheme0,
69 .cnt = ARRAY_SIZE(routing_scheme0),
73 static void set_input(struct pvr2_v4l_decoder *ctxt)
75 struct pvr2_hdw *hdw = ctxt->hdw;
76 struct v4l2_routing route;
77 const struct routing_scheme *sp;
78 unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
80 pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);
82 if ((sid < ARRAY_SIZE(routing_schemes)) &&
83 ((sp = routing_schemes + sid) != NULL) &&
84 (hdw->input_val >= 0) &&
85 (hdw->input_val < sp->cnt)) {
86 route.input = sp->def[hdw->input_val];
88 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
89 "*** WARNING *** i2c v4l2 set_input:"
90 " Invalid routing scheme (%u) and/or input (%d)",
96 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
100 static int check_input(struct pvr2_v4l_decoder *ctxt)
102 struct pvr2_hdw *hdw = ctxt->hdw;
103 return hdw->input_dirty != 0;
107 static void set_audio(struct pvr2_v4l_decoder *ctxt)
110 struct pvr2_hdw *hdw = ctxt->hdw;
112 pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d",
114 switch (hdw->srate_val) {
116 case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
119 case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
122 case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
126 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
130 static int check_audio(struct pvr2_v4l_decoder *ctxt)
132 struct pvr2_hdw *hdw = ctxt->hdw;
133 return hdw->srate_dirty != 0;
137 struct pvr2_v4l_decoder_ops {
138 void (*update)(struct pvr2_v4l_decoder *);
139 int (*check)(struct pvr2_v4l_decoder *);
143 static const struct pvr2_v4l_decoder_ops decoder_ops[] = {
144 { .update = set_input, .check = check_input},
145 { .update = set_audio, .check = check_audio},
149 static void decoder_detach(struct pvr2_v4l_decoder *ctxt)
151 ctxt->client->handler = NULL;
152 pvr2_hdw_set_decoder(ctxt->hdw,NULL);
157 static int decoder_check(struct pvr2_v4l_decoder *ctxt)
162 for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
164 if (ctxt->stale_mask & msk) continue;
165 if (decoder_ops[idx].check(ctxt)) {
166 ctxt->stale_mask |= msk;
169 return ctxt->stale_mask != 0;
173 static void decoder_update(struct pvr2_v4l_decoder *ctxt)
178 for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
180 if (!(ctxt->stale_mask & msk)) continue;
181 ctxt->stale_mask &= ~msk;
182 decoder_ops[idx].update(ctxt);
187 static int decoder_detect(struct pvr2_i2c_client *cp)
189 /* Attempt to query the decoder - let's see if it will answer */
190 struct v4l2_tuner vt;
193 memset(&vt,0,sizeof(vt));
194 ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt);
195 return ret == 0; /* Return true if it answered */
199 static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl)
201 pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl);
202 pvr2_v4l2_cmd_stream(ctxt->client,fl);
206 static unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt)
208 return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l");
212 static const struct pvr2_i2c_handler_functions hfuncs = {
213 .detach = (void (*)(void *))decoder_detach,
214 .check = (int (*)(void *))decoder_check,
215 .update = (void (*)(void *))decoder_update,
216 .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
220 int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
221 struct pvr2_i2c_client *cp)
223 struct pvr2_v4l_decoder *ctxt;
225 if (hdw->decoder_ctrl) return 0;
226 if (cp->handler) return 0;
227 if (!decoder_detect(cp)) return 0;
229 ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
232 ctxt->handler.func_data = ctxt;
233 ctxt->handler.func_table = &hfuncs;
234 ctxt->ctrl.ctxt = ctxt;
235 ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
236 ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
239 ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
240 pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
241 cp->handler = &ctxt->handler;
242 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
251 Stuff for Emacs to see, in order to encourage consistent editing style:
252 *** Local Variables: ***
254 *** fill-column: 70 ***
256 *** c-basic-offset: 8 ***