V4L/DVB (8428): videodev: rename 'dev' to 'parent'
[linux-3.10.git] / drivers / media / video / cx18 / cx18-streams.c
1 /*
2  *  cx18 init/start/stop/exit stream functions
3  *
4  *  Derived from ivtv-streams.c
5  *
6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
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, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21  *  02111-1307  USA
22  */
23
24 #include "cx18-driver.h"
25 #include "cx18-fileops.h"
26 #include "cx18-mailbox.h"
27 #include "cx18-i2c.h"
28 #include "cx18-queue.h"
29 #include "cx18-ioctl.h"
30 #include "cx18-streams.h"
31 #include "cx18-cards.h"
32 #include "cx18-scb.h"
33 #include "cx18-av-core.h"
34 #include "cx18-dvb.h"
35
36 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
37
38 static struct file_operations cx18_v4l2_enc_fops = {
39         .owner = THIS_MODULE,
40         .read = cx18_v4l2_read,
41         .open = cx18_v4l2_open,
42         /* FIXME change to video_ioctl2 if serialization lock can be removed */
43         .ioctl = cx18_v4l2_ioctl,
44         .compat_ioctl = v4l_compat_ioctl32,
45         .release = cx18_v4l2_close,
46         .poll = cx18_v4l2_enc_poll,
47 };
48
49 /* offset from 0 to register ts v4l2 minors on */
50 #define CX18_V4L2_ENC_TS_OFFSET   16
51 /* offset from 0 to register pcm v4l2 minors on */
52 #define CX18_V4L2_ENC_PCM_OFFSET  24
53 /* offset from 0 to register yuv v4l2 minors on */
54 #define CX18_V4L2_ENC_YUV_OFFSET  32
55
56 static struct {
57         const char *name;
58         int vfl_type;
59         int minor_offset;
60         int dma;
61         enum v4l2_buf_type buf_type;
62         struct file_operations *fops;
63 } cx18_stream_info[] = {
64         {       /* CX18_ENC_STREAM_TYPE_MPG */
65                 "encoder MPEG",
66                 VFL_TYPE_GRABBER, 0,
67                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
68                 &cx18_v4l2_enc_fops
69         },
70         {       /* CX18_ENC_STREAM_TYPE_TS */
71                 "TS",
72                 VFL_TYPE_GRABBER, -1,
73                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
74                 &cx18_v4l2_enc_fops
75         },
76         {       /* CX18_ENC_STREAM_TYPE_YUV */
77                 "encoder YUV",
78                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
79                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
80                 &cx18_v4l2_enc_fops
81         },
82         {       /* CX18_ENC_STREAM_TYPE_VBI */
83                 "encoder VBI",
84                 VFL_TYPE_VBI, 0,
85                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
86                 &cx18_v4l2_enc_fops
87         },
88         {       /* CX18_ENC_STREAM_TYPE_PCM */
89                 "encoder PCM audio",
90                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
91                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
92                 &cx18_v4l2_enc_fops
93         },
94         {       /* CX18_ENC_STREAM_TYPE_IDX */
95                 "encoder IDX",
96                 VFL_TYPE_GRABBER, -1,
97                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
98                 &cx18_v4l2_enc_fops
99         },
100         {       /* CX18_ENC_STREAM_TYPE_RAD */
101                 "encoder radio",
102                 VFL_TYPE_RADIO, 0,
103                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
104                 &cx18_v4l2_enc_fops
105         },
106 };
107
108 static void cx18_stream_init(struct cx18 *cx, int type)
109 {
110         struct cx18_stream *s = &cx->streams[type];
111         struct video_device *dev = s->v4l2dev;
112         u32 max_size = cx->options.megabytes[type] * 1024 * 1024;
113
114         /* we need to keep v4l2dev, so restore it afterwards */
115         memset(s, 0, sizeof(*s));
116         s->v4l2dev = dev;
117
118         /* initialize cx18_stream fields */
119         s->cx = cx;
120         s->type = type;
121         s->name = cx18_stream_info[type].name;
122         s->handle = 0xffffffff;
123
124         s->dma = cx18_stream_info[type].dma;
125         s->buf_size = cx->stream_buf_size[type];
126         if (s->buf_size)
127                 s->buffers = max_size / s->buf_size;
128         if (s->buffers > 63) {
129                 /* Each stream has a maximum of 63 buffers,
130                    ensure we do not exceed that. */
131                 s->buffers = 63;
132                 s->buf_size = (max_size / s->buffers) & ~0xfff;
133         }
134         spin_lock_init(&s->qlock);
135         init_waitqueue_head(&s->waitq);
136         s->id = -1;
137         cx18_queue_init(&s->q_free);
138         cx18_queue_init(&s->q_full);
139         cx18_queue_init(&s->q_io);
140 }
141
142 static int cx18_prep_dev(struct cx18 *cx, int type)
143 {
144         struct cx18_stream *s = &cx->streams[type];
145         u32 cap = cx->v4l2_cap;
146         int minor_offset = cx18_stream_info[type].minor_offset;
147         int minor;
148
149         /* These four fields are always initialized. If v4l2dev == NULL, then
150            this stream is not in use. In that case no other fields but these
151            four can be used. */
152         s->v4l2dev = NULL;
153         s->cx = cx;
154         s->type = type;
155         s->name = cx18_stream_info[type].name;
156
157         /* Check whether the radio is supported */
158         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
159                 return 0;
160
161         /* Check whether VBI is supported */
162         if (type == CX18_ENC_STREAM_TYPE_VBI &&
163             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
164                 return 0;
165
166         /* card number + user defined offset + device offset */
167         minor = cx->num + cx18_first_minor + minor_offset;
168
169         /* User explicitly selected 0 buffers for these streams, so don't
170            create them. */
171         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
172             cx->options.megabytes[type] == 0) {
173                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
174                 return 0;
175         }
176
177         cx18_stream_init(cx, type);
178
179         if (minor_offset == -1)
180                 return 0;
181
182         /* allocate and initialize the v4l2 video device structure */
183         s->v4l2dev = video_device_alloc();
184         if (s->v4l2dev == NULL) {
185                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
186                                 s->name);
187                 return -ENOMEM;
188         }
189
190         s->v4l2dev->type =
191                 VID_TYPE_CAPTURE | VID_TYPE_TUNER | VID_TYPE_TELETEXT |
192                 VID_TYPE_CLIPPING | VID_TYPE_SCALES | VID_TYPE_MPEG_ENCODER;
193         snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18-%d",
194                         cx->num);
195
196         s->v4l2dev->minor = minor;
197         s->v4l2dev->parent = &cx->dev->dev;
198         s->v4l2dev->fops = cx18_stream_info[type].fops;
199         s->v4l2dev->release = video_device_release;
200         s->v4l2dev->tvnorms = V4L2_STD_ALL;
201         cx18_set_funcs(s->v4l2dev);
202         return 0;
203 }
204
205 /* Initialize v4l2 variables and register v4l2 devices */
206 int cx18_streams_setup(struct cx18 *cx)
207 {
208         int type;
209
210         /* Setup V4L2 Devices */
211         for (type = 0; type < CX18_MAX_STREAMS; type++) {
212                 /* Prepare device */
213                 if (cx18_prep_dev(cx, type))
214                         break;
215
216                 /* Allocate Stream */
217                 if (cx18_stream_alloc(&cx->streams[type]))
218                         break;
219         }
220         if (type == CX18_MAX_STREAMS)
221                 return 0;
222
223         /* One or more streams could not be initialized. Clean 'em all up. */
224         cx18_streams_cleanup(cx, 0);
225         return -ENOMEM;
226 }
227
228 static int cx18_reg_dev(struct cx18 *cx, int type)
229 {
230         struct cx18_stream *s = &cx->streams[type];
231         int vfl_type = cx18_stream_info[type].vfl_type;
232         int minor;
233
234         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
235          * We need a VFL_TYPE_TS defined.
236          */
237         if (strcmp("TS", s->name) == 0) {
238                 /* just return if no DVB is supported */
239                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
240                         return 0;
241                 if (cx18_dvb_register(s) < 0) {
242                         CX18_ERR("DVB failed to register\n");
243                         return -EINVAL;
244                 }
245         }
246
247         if (s->v4l2dev == NULL)
248                 return 0;
249
250         minor = s->v4l2dev->minor;
251
252         /* Register device. First try the desired minor, then any free one. */
253         if (video_register_device(s->v4l2dev, vfl_type, minor) &&
254                         video_register_device(s->v4l2dev, vfl_type, -1)) {
255                 CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
256                         s->name, minor);
257                 video_device_release(s->v4l2dev);
258                 s->v4l2dev = NULL;
259                 return -ENOMEM;
260         }
261         minor = s->v4l2dev->minor;
262
263         switch (vfl_type) {
264         case VFL_TYPE_GRABBER:
265                 CX18_INFO("Registered device video%d for %s (%d MB)\n",
266                         minor, s->name, cx->options.megabytes[type]);
267                 break;
268
269         case VFL_TYPE_RADIO:
270                 CX18_INFO("Registered device radio%d for %s\n",
271                         minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
272                 break;
273
274         case VFL_TYPE_VBI:
275                 if (cx->options.megabytes[type])
276                         CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
277                                 minor - MINOR_VFL_TYPE_VBI_MIN,
278                                 s->name, cx->options.megabytes[type]);
279                 else
280                         CX18_INFO("Registered device vbi%d for %s\n",
281                                 minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
282                 break;
283         }
284
285         return 0;
286 }
287
288 /* Register v4l2 devices */
289 int cx18_streams_register(struct cx18 *cx)
290 {
291         int type;
292         int err = 0;
293
294         /* Register V4L2 devices */
295         for (type = 0; type < CX18_MAX_STREAMS; type++)
296                 err |= cx18_reg_dev(cx, type);
297
298         if (err == 0)
299                 return 0;
300
301         /* One or more streams could not be initialized. Clean 'em all up. */
302         cx18_streams_cleanup(cx, 1);
303         return -ENOMEM;
304 }
305
306 /* Unregister v4l2 devices */
307 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
308 {
309         struct video_device *vdev;
310         int type;
311
312         /* Teardown all streams */
313         for (type = 0; type < CX18_MAX_STREAMS; type++) {
314                 if (cx->streams[type].dvb.enabled) {
315                         cx18_dvb_unregister(&cx->streams[type]);
316                         cx->streams[type].dvb.enabled = false;
317                 }
318
319                 vdev = cx->streams[type].v4l2dev;
320
321                 cx->streams[type].v4l2dev = NULL;
322                 if (vdev == NULL)
323                         continue;
324
325                 cx18_stream_free(&cx->streams[type]);
326
327                 /* Unregister or release device */
328                 if (unregister)
329                         video_unregister_device(vdev);
330                 else
331                         video_device_release(vdev);
332         }
333 }
334
335 static void cx18_vbi_setup(struct cx18_stream *s)
336 {
337         struct cx18 *cx = s->cx;
338         int raw = cx->vbi.sliced_in->service_set == 0;
339         u32 data[CX2341X_MBOX_MAX_DATA];
340         int lines;
341
342         if (cx->is_60hz) {
343                 cx->vbi.count = 12;
344                 cx->vbi.start[0] = 10;
345                 cx->vbi.start[1] = 273;
346         } else {        /* PAL/SECAM */
347                 cx->vbi.count = 18;
348                 cx->vbi.start[0] = 6;
349                 cx->vbi.start[1] = 318;
350         }
351
352         /* setup VBI registers */
353         cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
354
355         /* determine number of lines and total number of VBI bytes.
356            A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
357            The '- 1' byte is probably an unused U or V byte. Or something...
358            A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
359            header, 42 data bytes + checksum (to be confirmed) */
360         if (raw) {
361                 lines = cx->vbi.count * 2;
362         } else {
363                 lines = cx->is_60hz ? 24 : 38;
364                 if (cx->is_60hz)
365                         lines += 2;
366         }
367
368         cx->vbi.enc_size = lines *
369                 (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
370
371         data[0] = s->handle;
372         /* Lines per field */
373         data[1] = (lines / 2) | ((lines / 2) << 16);
374         /* bytes per line */
375         data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
376         /* Every X number of frames a VBI interrupt arrives
377            (frames as in 25 or 30 fps) */
378         data[3] = 1;
379         /* Setup VBI for the cx25840 digitizer */
380         if (raw) {
381                 data[4] = 0x20602060;
382                 data[5] = 0x30703070;
383         } else {
384                 data[4] = 0xB0F0B0F0;
385                 data[5] = 0xA0E0A0E0;
386         }
387
388         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
389                         data[0], data[1], data[2], data[3], data[4], data[5]);
390
391         if (s->type == CX18_ENC_STREAM_TYPE_VBI)
392                 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
393 }
394
395 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
396 {
397         u32 data[MAX_MB_ARGUMENTS];
398         struct cx18 *cx = s->cx;
399         struct list_head *p;
400         int ts = 0;
401         int captype = 0;
402
403         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
404                 return -EINVAL;
405
406         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
407
408         switch (s->type) {
409         case CX18_ENC_STREAM_TYPE_MPG:
410                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
411                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
412                 cx->dualwatch_jiffies = jiffies;
413                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
414                 cx->search_pack_header = 0;
415                 break;
416
417         case CX18_ENC_STREAM_TYPE_TS:
418                 captype = CAPTURE_CHANNEL_TYPE_TS;
419                 ts = 1;
420                 break;
421         case CX18_ENC_STREAM_TYPE_YUV:
422                 captype = CAPTURE_CHANNEL_TYPE_YUV;
423                 break;
424         case CX18_ENC_STREAM_TYPE_PCM:
425                 captype = CAPTURE_CHANNEL_TYPE_PCM;
426                 break;
427         case CX18_ENC_STREAM_TYPE_VBI:
428                 captype = cx->vbi.sliced_in->service_set ?
429                     CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
430                 cx->vbi.frame = 0;
431                 cx->vbi.inserted_frame = 0;
432                 memset(cx->vbi.sliced_mpeg_size,
433                         0, sizeof(cx->vbi.sliced_mpeg_size));
434                 break;
435         default:
436                 return -EINVAL;
437         }
438         s->buffers_stolen = 0;
439
440         /* mute/unmute video */
441         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
442                   s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
443
444         /* Clear Streamoff flags in case left from last capture */
445         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
446
447         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
448         s->handle = data[0];
449         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
450
451         if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
452                 /* Stuff from Windows, we don't know what it is */
453                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
454                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
455                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
456                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
457                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
458
459                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
460                                s->handle, cx->digitizer, cx->digitizer);
461
462                 /* Setup VBI */
463                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
464                         cx18_vbi_setup(s);
465
466                 /* assign program index info.
467                    Mask 7: select I/P/B, Num_req: 400 max */
468                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
469
470                 /* Setup API for Stream */
471                 cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
472         }
473
474         if (atomic_read(&cx->tot_capturing) == 0) {
475                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
476                 write_reg(7, CX18_DSP0_INTERRUPT_MASK);
477         }
478
479         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
480                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
481                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
482
483         list_for_each(p, &s->q_free.list) {
484                 struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
485
486                 writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
487                 writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
488                 cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
489                         (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
490                         1, buf->id, s->buf_size);
491         }
492         /* begin_capture */
493         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
494                 CX18_DEBUG_WARN("Error starting capture!\n");
495                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
496                 return -EINVAL;
497         }
498
499         /* you're live! sit back and await interrupts :) */
500         if (!ts)
501                 atomic_inc(&cx->ana_capturing);
502         atomic_inc(&cx->tot_capturing);
503         return 0;
504 }
505
506 void cx18_stop_all_captures(struct cx18 *cx)
507 {
508         int i;
509
510         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
511                 struct cx18_stream *s = &cx->streams[i];
512
513                 if (s->v4l2dev == NULL && s->dvb.enabled == 0)
514                         continue;
515                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
516                         cx18_stop_v4l2_encode_stream(s, 0);
517         }
518 }
519
520 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
521 {
522         struct cx18 *cx = s->cx;
523         unsigned long then;
524
525         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
526                 return -EINVAL;
527
528         /* This function assumes that you are allowed to stop the capture
529            and that we are actually capturing */
530
531         CX18_DEBUG_INFO("Stop Capture\n");
532
533         if (atomic_read(&cx->tot_capturing) == 0)
534                 return 0;
535
536         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
537                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
538         else
539                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
540
541         then = jiffies;
542
543         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
544                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
545         }
546
547         if (s->type != CX18_ENC_STREAM_TYPE_TS)
548                 atomic_dec(&cx->ana_capturing);
549         atomic_dec(&cx->tot_capturing);
550
551         /* Clear capture and no-read bits */
552         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
553
554         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
555         s->handle = 0xffffffff;
556
557         if (atomic_read(&cx->tot_capturing) > 0)
558                 return 0;
559
560         write_reg(5, CX18_DSP0_INTERRUPT_MASK);
561         wake_up(&s->waitq);
562
563         return 0;
564 }
565
566 u32 cx18_find_handle(struct cx18 *cx)
567 {
568         int i;
569
570         /* find first available handle to be used for global settings */
571         for (i = 0; i < CX18_MAX_STREAMS; i++) {
572                 struct cx18_stream *s = &cx->streams[i];
573
574                 if (s->v4l2dev && s->handle)
575                         return s->handle;
576         }
577         return 0;
578 }