Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[linux-2.6] / drivers / media / video / pvrusb2 / pvrusb2-cx2584x-v4l.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 /*
24
25    This source file is specifically designed to interface with the
26    cx2584x, in kernels 2.6.16 or newer.
27
28 */
29
30 #include "pvrusb2-cx2584x-v4l.h"
31 #include "pvrusb2-video-v4l.h"
32 #include "pvrusb2-i2c-cmd-v4l2.h"
33
34
35 #include "pvrusb2-hdw-internal.h"
36 #include "pvrusb2-debug.h"
37 #include <media/cx25840.h>
38 #include <linux/videodev2.h>
39 #include <media/v4l2-common.h>
40 #include <linux/errno.h>
41 #include <linux/slab.h>
42
43 struct pvr2_v4l_cx2584x {
44         struct pvr2_i2c_handler handler;
45         struct pvr2_decoder_ctrl ctrl;
46         struct pvr2_i2c_client *client;
47         struct pvr2_hdw *hdw;
48         unsigned long stale_mask;
49 };
50
51
52 static void set_input(struct pvr2_v4l_cx2584x *ctxt)
53 {
54         struct pvr2_hdw *hdw = ctxt->hdw;
55         struct v4l2_routing route;
56         enum cx25840_video_input vid_input;
57         enum cx25840_audio_input aud_input;
58
59         memset(&route,0,sizeof(route));
60
61         switch(hdw->input_val) {
62         case PVR2_CVAL_INPUT_TV:
63                 vid_input = CX25840_COMPOSITE7;
64                 aud_input = CX25840_AUDIO8;
65                 break;
66         case PVR2_CVAL_INPUT_COMPOSITE:
67                 vid_input = CX25840_COMPOSITE3;
68                 aud_input = CX25840_AUDIO_SERIAL;
69                 break;
70         case PVR2_CVAL_INPUT_SVIDEO:
71                 vid_input = CX25840_SVIDEO1;
72                 aud_input = CX25840_AUDIO_SERIAL;
73                 break;
74         case PVR2_CVAL_INPUT_RADIO:
75         default:
76                 // Just set it to be composite input for now...
77                 vid_input = CX25840_COMPOSITE3;
78                 aud_input = CX25840_AUDIO_SERIAL;
79                 break;
80         }
81
82         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_input vid=0x%x aud=0x%x",
83                    vid_input,aud_input);
84         route.input = (u32)vid_input;
85         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
86         route.input = (u32)aud_input;
87         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
88 }
89
90
91 static int check_input(struct pvr2_v4l_cx2584x *ctxt)
92 {
93         struct pvr2_hdw *hdw = ctxt->hdw;
94         return hdw->input_dirty != 0;
95 }
96
97
98 static void set_audio(struct pvr2_v4l_cx2584x *ctxt)
99 {
100         u32 val;
101         struct pvr2_hdw *hdw = ctxt->hdw;
102
103         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_audio %d",
104                    hdw->srate_val);
105         switch (hdw->srate_val) {
106         default:
107         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
108                 val = 48000;
109                 break;
110         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
111                 val = 44100;
112                 break;
113         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
114                 val = 32000;
115                 break;
116         }
117         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
118 }
119
120
121 static int check_audio(struct pvr2_v4l_cx2584x *ctxt)
122 {
123         struct pvr2_hdw *hdw = ctxt->hdw;
124         return hdw->srate_dirty != 0;
125 }
126
127
128 struct pvr2_v4l_cx2584x_ops {
129         void (*update)(struct pvr2_v4l_cx2584x *);
130         int (*check)(struct pvr2_v4l_cx2584x *);
131 };
132
133
134 static const struct pvr2_v4l_cx2584x_ops decoder_ops[] = {
135         { .update = set_input, .check = check_input},
136         { .update = set_audio, .check = check_audio},
137 };
138
139
140 static void decoder_detach(struct pvr2_v4l_cx2584x *ctxt)
141 {
142         ctxt->client->handler = NULL;
143         ctxt->hdw->decoder_ctrl = NULL;
144         kfree(ctxt);
145 }
146
147
148 static int decoder_check(struct pvr2_v4l_cx2584x *ctxt)
149 {
150         unsigned long msk;
151         unsigned int idx;
152
153         for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]);
154              idx++) {
155                 msk = 1 << idx;
156                 if (ctxt->stale_mask & msk) continue;
157                 if (decoder_ops[idx].check(ctxt)) {
158                         ctxt->stale_mask |= msk;
159                 }
160         }
161         return ctxt->stale_mask != 0;
162 }
163
164
165 static void decoder_update(struct pvr2_v4l_cx2584x *ctxt)
166 {
167         unsigned long msk;
168         unsigned int idx;
169
170         for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]);
171              idx++) {
172                 msk = 1 << idx;
173                 if (!(ctxt->stale_mask & msk)) continue;
174                 ctxt->stale_mask &= ~msk;
175                 decoder_ops[idx].update(ctxt);
176         }
177 }
178
179
180 static void decoder_enable(struct pvr2_v4l_cx2584x *ctxt,int fl)
181 {
182         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_enable(%d)",fl);
183         pvr2_v4l2_cmd_stream(ctxt->client,fl);
184 }
185
186
187 static int decoder_detect(struct pvr2_i2c_client *cp)
188 {
189         int ret;
190         /* Attempt to query the decoder - let's see if it will answer */
191         struct v4l2_queryctrl qc;
192
193         memset(&qc,0,sizeof(qc));
194
195         qc.id = V4L2_CID_BRIGHTNESS;
196
197         ret = pvr2_i2c_client_cmd(cp,VIDIOC_QUERYCTRL,&qc);
198         return ret == 0; /* Return true if it answered */
199 }
200
201
202 static int decoder_is_tuned(struct pvr2_v4l_cx2584x *ctxt)
203 {
204         struct v4l2_tuner vt;
205         int ret;
206
207         memset(&vt,0,sizeof(vt));
208         ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_G_TUNER,&vt);
209         if (ret < 0) return -EINVAL;
210         return vt.signal ? 1 : 0;
211 }
212
213
214 static unsigned int decoder_describe(struct pvr2_v4l_cx2584x *ctxt,
215                                      char *buf,unsigned int cnt)
216 {
217         return scnprintf(buf,cnt,"handler: pvrusb2-cx2584x-v4l");
218 }
219
220
221 static void decoder_reset(struct pvr2_v4l_cx2584x *ctxt)
222 {
223         int ret;
224         ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,0);
225         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_reset (ret=%d)",ret);
226 }
227
228
229 const static struct pvr2_i2c_handler_functions hfuncs = {
230         .detach = (void (*)(void *))decoder_detach,
231         .check = (int (*)(void *))decoder_check,
232         .update = (void (*)(void *))decoder_update,
233         .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
234 };
235
236
237 int pvr2_i2c_cx2584x_v4l_setup(struct pvr2_hdw *hdw,
238                                struct pvr2_i2c_client *cp)
239 {
240         struct pvr2_v4l_cx2584x *ctxt;
241
242         if (hdw->decoder_ctrl) return 0;
243         if (cp->handler) return 0;
244         if (!decoder_detect(cp)) return 0;
245
246         ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
247         if (!ctxt) return 0;
248         memset(ctxt,0,sizeof(*ctxt));
249
250         ctxt->handler.func_data = ctxt;
251         ctxt->handler.func_table = &hfuncs;
252         ctxt->ctrl.ctxt = ctxt;
253         ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
254         ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
255         ctxt->ctrl.tuned = (int (*)(void *))decoder_is_tuned;
256         ctxt->ctrl.force_reset = (void (*)(void*))decoder_reset;
257         ctxt->client = cp;
258         ctxt->hdw = hdw;
259         ctxt->stale_mask = (1 << (sizeof(decoder_ops)/
260                                   sizeof(decoder_ops[0]))) - 1;
261         hdw->decoder_ctrl = &ctxt->ctrl;
262         cp->handler = &ctxt->handler;
263         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x cx2584x V4L2 handler set up",
264                    cp->client->addr);
265         return !0;
266 }
267
268
269
270
271 /*
272   Stuff for Emacs to see, in order to encourage consistent editing style:
273   *** Local Variables: ***
274   *** mode: c ***
275   *** fill-column: 70 ***
276   *** tab-width: 8 ***
277   *** c-basic-offset: 8 ***
278   *** End: ***
279   */