Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6] / 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         .ioctl = cx18_v4l2_ioctl,
43         .compat_ioctl = v4l_compat_ioctl32,
44         .release = cx18_v4l2_close,
45         .poll = cx18_v4l2_enc_poll,
46 };
47
48 /* offset from 0 to register ts v4l2 minors on */
49 #define CX18_V4L2_ENC_TS_OFFSET   16
50 /* offset from 0 to register pcm v4l2 minors on */
51 #define CX18_V4L2_ENC_PCM_OFFSET  24
52 /* offset from 0 to register yuv v4l2 minors on */
53 #define CX18_V4L2_ENC_YUV_OFFSET  32
54
55 static struct {
56         const char *name;
57         int vfl_type;
58         int minor_offset;
59         int dma;
60         enum v4l2_buf_type buf_type;
61         struct file_operations *fops;
62 } cx18_stream_info[] = {
63         {       /* CX18_ENC_STREAM_TYPE_MPG */
64                 "encoder MPEG",
65                 VFL_TYPE_GRABBER, 0,
66                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
67                 &cx18_v4l2_enc_fops
68         },
69         {       /* CX18_ENC_STREAM_TYPE_TS */
70                 "TS",
71                 VFL_TYPE_GRABBER, -1,
72                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
73                 &cx18_v4l2_enc_fops
74         },
75         {       /* CX18_ENC_STREAM_TYPE_YUV */
76                 "encoder YUV",
77                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
78                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
79                 &cx18_v4l2_enc_fops
80         },
81         {       /* CX18_ENC_STREAM_TYPE_VBI */
82                 "encoder VBI",
83                 VFL_TYPE_VBI, 0,
84                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
85                 &cx18_v4l2_enc_fops
86         },
87         {       /* CX18_ENC_STREAM_TYPE_PCM */
88                 "encoder PCM audio",
89                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
90                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
91                 &cx18_v4l2_enc_fops
92         },
93         {       /* CX18_ENC_STREAM_TYPE_IDX */
94                 "encoder IDX",
95                 VFL_TYPE_GRABBER, -1,
96                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
97                 &cx18_v4l2_enc_fops
98         },
99         {       /* CX18_ENC_STREAM_TYPE_RAD */
100                 "encoder radio",
101                 VFL_TYPE_RADIO, 0,
102                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
103                 &cx18_v4l2_enc_fops
104         },
105 };
106
107 static void cx18_stream_init(struct cx18 *cx, int type)
108 {
109         struct cx18_stream *s = &cx->streams[type];
110         struct video_device *dev = s->v4l2dev;
111         u32 max_size = cx->options.megabytes[type] * 1024 * 1024;
112
113         /* we need to keep v4l2dev, so restore it afterwards */
114         memset(s, 0, sizeof(*s));
115         s->v4l2dev = dev;
116
117         /* initialize cx18_stream fields */
118         s->cx = cx;
119         s->type = type;
120         s->name = cx18_stream_info[type].name;
121         s->handle = 0xffffffff;
122
123         s->dma = cx18_stream_info[type].dma;
124         s->buf_size = cx->stream_buf_size[type];
125         if (s->buf_size)
126                 s->buffers = max_size / s->buf_size;
127         if (s->buffers > 63) {
128                 /* Each stream has a maximum of 63 buffers,
129                    ensure we do not exceed that. */
130                 s->buffers = 63;
131                 s->buf_size = (max_size / s->buffers) & ~0xfff;
132         }
133         spin_lock_init(&s->qlock);
134         init_waitqueue_head(&s->waitq);
135         s->id = -1;
136         cx18_queue_init(&s->q_free);
137         cx18_queue_init(&s->q_full);
138         cx18_queue_init(&s->q_io);
139 }
140
141 static int cx18_prep_dev(struct cx18 *cx, int type)
142 {
143         struct cx18_stream *s = &cx->streams[type];
144         u32 cap = cx->v4l2_cap;
145         int minor_offset = cx18_stream_info[type].minor_offset;
146         int minor;
147
148         /* These four fields are always initialized. If v4l2dev == NULL, then
149            this stream is not in use. In that case no other fields but these
150            four can be used. */
151         s->v4l2dev = NULL;
152         s->cx = cx;
153         s->type = type;
154         s->name = cx18_stream_info[type].name;
155
156         /* Check whether the radio is supported */
157         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
158                 return 0;
159
160         /* Check whether VBI is supported */
161         if (type == CX18_ENC_STREAM_TYPE_VBI &&
162             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
163                 return 0;
164
165         /* card number + user defined offset + device offset */
166         minor = cx->num + cx18_first_minor + minor_offset;
167
168         /* User explicitly selected 0 buffers for these streams, so don't
169            create them. */
170         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
171             cx->options.megabytes[type] == 0) {
172                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
173                 return 0;
174         }
175
176         cx18_stream_init(cx, type);
177
178         if (minor_offset == -1)
179                 return 0;
180
181         /* allocate and initialize the v4l2 video device structure */
182         s->v4l2dev = video_device_alloc();
183         if (s->v4l2dev == NULL) {
184                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
185                                 s->name);
186                 return -ENOMEM;
187         }
188
189         s->v4l2dev->type =
190                 VID_TYPE_CAPTURE | VID_TYPE_TUNER | VID_TYPE_TELETEXT |
191                 VID_TYPE_CLIPPING | VID_TYPE_SCALES | VID_TYPE_MPEG_ENCODER;
192         snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18%d %s",
193                         cx->num, s->name);
194
195         s->v4l2dev->minor = minor;
196         s->v4l2dev->dev = &cx->dev->dev;
197         s->v4l2dev->fops = cx18_stream_info[type].fops;
198         s->v4l2dev->release = video_device_release;
199
200         return 0;
201 }
202
203 /* Initialize v4l2 variables and register v4l2 devices */
204 int cx18_streams_setup(struct cx18 *cx)
205 {
206         int type;
207
208         /* Setup V4L2 Devices */
209         for (type = 0; type < CX18_MAX_STREAMS; type++) {
210                 /* Prepare device */
211                 if (cx18_prep_dev(cx, type))
212                         break;
213
214                 /* Allocate Stream */
215                 if (cx18_stream_alloc(&cx->streams[type]))
216                         break;
217         }
218         if (type == CX18_MAX_STREAMS)
219                 return 0;
220
221         /* One or more streams could not be initialized. Clean 'em all up. */
222         cx18_streams_cleanup(cx, 0);
223         return -ENOMEM;
224 }
225
226 static int cx18_reg_dev(struct cx18 *cx, int type)
227 {
228         struct cx18_stream *s = &cx->streams[type];
229         int vfl_type = cx18_stream_info[type].vfl_type;
230         int minor;
231
232         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
233          * We need a VFL_TYPE_TS defined.
234          */
235         if (strcmp("TS", s->name) == 0) {
236                 /* just return if no DVB is supported */
237                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
238                         return 0;
239                 if (cx18_dvb_register(s) < 0) {
240                         CX18_ERR("DVB failed to register\n");
241                         return -EINVAL;
242                 }
243         }
244
245         if (s->v4l2dev == NULL)
246                 return 0;
247
248         minor = s->v4l2dev->minor;
249
250         /* Register device. First try the desired minor, then any free one. */
251         if (video_register_device(s->v4l2dev, vfl_type, minor) &&
252                         video_register_device(s->v4l2dev, vfl_type, -1)) {
253                 CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
254                         s->name, minor);
255                 video_device_release(s->v4l2dev);
256                 s->v4l2dev = NULL;
257                 return -ENOMEM;
258         }
259         minor = s->v4l2dev->minor;
260
261         switch (vfl_type) {
262         case VFL_TYPE_GRABBER:
263                 CX18_INFO("Registered device video%d for %s (%d MB)\n",
264                         minor, s->name, cx->options.megabytes[type]);
265                 break;
266
267         case VFL_TYPE_RADIO:
268                 CX18_INFO("Registered device radio%d for %s\n",
269                         minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
270                 break;
271
272         case VFL_TYPE_VBI:
273                 if (cx->options.megabytes[type])
274                         CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
275                                 minor - MINOR_VFL_TYPE_VBI_MIN,
276                                 s->name, cx->options.megabytes[type]);
277                 else
278                         CX18_INFO("Registered device vbi%d for %s\n",
279                                 minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
280                 break;
281         }
282
283         return 0;
284 }
285
286 /* Register v4l2 devices */
287 int cx18_streams_register(struct cx18 *cx)
288 {
289         int type;
290         int err = 0;
291
292         /* Register V4L2 devices */
293         for (type = 0; type < CX18_MAX_STREAMS; type++)
294                 err |= cx18_reg_dev(cx, type);
295
296         if (err == 0)
297                 return 0;
298
299         /* One or more streams could not be initialized. Clean 'em all up. */
300         cx18_streams_cleanup(cx, 1);
301         return -ENOMEM;
302 }
303
304 /* Unregister v4l2 devices */
305 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
306 {
307         struct video_device *vdev;
308         int type;
309
310         /* Teardown all streams */
311         for (type = 0; type < CX18_MAX_STREAMS; type++) {
312                 if (cx->streams[type].dvb.enabled)
313                         cx18_dvb_unregister(&cx->streams[type]);
314
315                 vdev = cx->streams[type].v4l2dev;
316
317                 cx->streams[type].v4l2dev = NULL;
318                 if (vdev == NULL)
319                         continue;
320
321                 cx18_stream_free(&cx->streams[type]);
322
323                 /* Unregister or release device */
324                 if (unregister)
325                         video_unregister_device(vdev);
326                 else
327                         video_device_release(vdev);
328         }
329 }
330
331 static void cx18_vbi_setup(struct cx18_stream *s)
332 {
333         struct cx18 *cx = s->cx;
334         int raw = cx->vbi.sliced_in->service_set == 0;
335         u32 data[CX2341X_MBOX_MAX_DATA];
336         int lines;
337
338         if (cx->is_60hz) {
339                 cx->vbi.count = 12;
340                 cx->vbi.start[0] = 10;
341                 cx->vbi.start[1] = 273;
342         } else {        /* PAL/SECAM */
343                 cx->vbi.count = 18;
344                 cx->vbi.start[0] = 6;
345                 cx->vbi.start[1] = 318;
346         }
347
348         /* setup VBI registers */
349         cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
350
351         /* determine number of lines and total number of VBI bytes.
352            A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
353            The '- 1' byte is probably an unused U or V byte. Or something...
354            A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
355            header, 42 data bytes + checksum (to be confirmed) */
356         if (raw) {
357                 lines = cx->vbi.count * 2;
358         } else {
359                 lines = cx->is_60hz ? 24 : 38;
360                 if (cx->is_60hz)
361                         lines += 2;
362         }
363
364         cx->vbi.enc_size = lines *
365                 (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
366
367         data[0] = s->handle;
368         /* Lines per field */
369         data[1] = (lines / 2) | ((lines / 2) << 16);
370         /* bytes per line */
371         data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
372         /* Every X number of frames a VBI interrupt arrives
373            (frames as in 25 or 30 fps) */
374         data[3] = 1;
375         /* Setup VBI for the cx25840 digitizer */
376         if (raw) {
377                 data[4] = 0x20602060;
378                 data[5] = 0x30703070;
379         } else {
380                 data[4] = 0xB0F0B0F0;
381                 data[5] = 0xA0E0A0E0;
382         }
383
384         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
385                         data[0], data[1], data[2], data[3], data[4], data[5]);
386
387         if (s->type == CX18_ENC_STREAM_TYPE_VBI)
388                 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
389 }
390
391 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
392 {
393         u32 data[MAX_MB_ARGUMENTS];
394         struct cx18 *cx = s->cx;
395         struct list_head *p;
396         int ts = 0;
397         int captype = 0;
398
399         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
400                 return -EINVAL;
401
402         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
403
404         switch (s->type) {
405         case CX18_ENC_STREAM_TYPE_MPG:
406                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
407                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
408                 cx->dualwatch_jiffies = jiffies;
409                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
410                 cx->search_pack_header = 0;
411                 break;
412
413         case CX18_ENC_STREAM_TYPE_TS:
414                 captype = CAPTURE_CHANNEL_TYPE_TS;
415                 ts = 1;
416                 break;
417         case CX18_ENC_STREAM_TYPE_YUV:
418                 captype = CAPTURE_CHANNEL_TYPE_YUV;
419                 break;
420         case CX18_ENC_STREAM_TYPE_PCM:
421                 captype = CAPTURE_CHANNEL_TYPE_PCM;
422                 break;
423         case CX18_ENC_STREAM_TYPE_VBI:
424                 captype = cx->vbi.sliced_in->service_set ?
425                     CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
426                 cx->vbi.frame = 0;
427                 cx->vbi.inserted_frame = 0;
428                 memset(cx->vbi.sliced_mpeg_size,
429                         0, sizeof(cx->vbi.sliced_mpeg_size));
430                 break;
431         default:
432                 return -EINVAL;
433         }
434         s->buffers_stolen = 0;
435
436         /* mute/unmute video */
437         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
438                   s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
439
440         /* Clear Streamoff flags in case left from last capture */
441         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
442
443         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
444         s->handle = data[0];
445         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
446
447         if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
448                 /* Stuff from Windows, we don't know what it is */
449                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
450                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
451                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
452                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
453                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
454
455                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
456                                s->handle, cx->digitizer, cx->digitizer);
457
458                 /* Setup VBI */
459                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
460                         cx18_vbi_setup(s);
461
462                 /* assign program index info.
463                    Mask 7: select I/P/B, Num_req: 400 max */
464                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
465
466                 /* Setup API for Stream */
467                 cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
468         }
469
470         if (atomic_read(&cx->tot_capturing) == 0) {
471                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
472                 write_reg(7, CX18_DSP0_INTERRUPT_MASK);
473         }
474
475         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
476                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
477                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
478
479         list_for_each(p, &s->q_free.list) {
480                 struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
481
482                 writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
483                 writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
484                 cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
485                         (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
486                         1, buf->id, s->buf_size);
487         }
488         /* begin_capture */
489         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
490                 CX18_DEBUG_WARN("Error starting capture!\n");
491                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
492                 return -EINVAL;
493         }
494
495         /* you're live! sit back and await interrupts :) */
496         if (!ts)
497                 atomic_inc(&cx->ana_capturing);
498         atomic_inc(&cx->tot_capturing);
499         return 0;
500 }
501
502 void cx18_stop_all_captures(struct cx18 *cx)
503 {
504         int i;
505
506         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
507                 struct cx18_stream *s = &cx->streams[i];
508
509                 if (s->v4l2dev == NULL && s->dvb.enabled == 0)
510                         continue;
511                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
512                         cx18_stop_v4l2_encode_stream(s, 0);
513         }
514 }
515
516 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
517 {
518         struct cx18 *cx = s->cx;
519         unsigned long then;
520
521         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
522                 return -EINVAL;
523
524         /* This function assumes that you are allowed to stop the capture
525            and that we are actually capturing */
526
527         CX18_DEBUG_INFO("Stop Capture\n");
528
529         if (atomic_read(&cx->tot_capturing) == 0)
530                 return 0;
531
532         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
533                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
534         else
535                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
536
537         then = jiffies;
538
539         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
540                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
541         }
542
543         if (s->type != CX18_ENC_STREAM_TYPE_TS)
544                 atomic_dec(&cx->ana_capturing);
545         atomic_dec(&cx->tot_capturing);
546
547         /* Clear capture and no-read bits */
548         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
549
550         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
551         s->handle = 0xffffffff;
552
553         if (atomic_read(&cx->tot_capturing) > 0)
554                 return 0;
555
556         write_reg(5, CX18_DSP0_INTERRUPT_MASK);
557         wake_up(&s->waitq);
558
559         return 0;
560 }
561
562 u32 cx18_find_handle(struct cx18 *cx)
563 {
564         int i;
565
566         /* find first available handle to be used for global settings */
567         for (i = 0; i < CX18_MAX_STREAMS; i++) {
568                 struct cx18_stream *s = &cx->streams[i];
569
570                 if (s->v4l2dev && s->handle)
571                         return s->handle;
572         }
573         return 0;
574 }