V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encoder chip
[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       .ioctl = cx18_v4l2_ioctl,
43       .release = cx18_v4l2_close,
44       .poll = cx18_v4l2_enc_poll,
45 };
46
47 /* offset from 0 to register ts v4l2 minors on */
48 #define CX18_V4L2_ENC_TS_OFFSET   16
49 /* offset from 0 to register pcm v4l2 minors on */
50 #define CX18_V4L2_ENC_PCM_OFFSET  24
51 /* offset from 0 to register yuv v4l2 minors on */
52 #define CX18_V4L2_ENC_YUV_OFFSET  32
53
54 static struct {
55         const char *name;
56         int vfl_type;
57         int minor_offset;
58         int dma;
59         enum v4l2_buf_type buf_type;
60         struct file_operations *fops;
61 } cx18_stream_info[] = {
62         {       /* CX18_ENC_STREAM_TYPE_MPG */
63                 "encoder MPEG",
64                 VFL_TYPE_GRABBER, 0,
65                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
66                 &cx18_v4l2_enc_fops
67         },
68         {       /* CX18_ENC_STREAM_TYPE_TS */
69                 "TS",
70                 VFL_TYPE_GRABBER, -1,
71                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
72                 &cx18_v4l2_enc_fops
73         },
74         {       /* CX18_ENC_STREAM_TYPE_YUV */
75                 "encoder YUV",
76                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
77                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
78                 &cx18_v4l2_enc_fops
79         },
80         {       /* CX18_ENC_STREAM_TYPE_VBI */
81                 "encoder VBI",
82                 VFL_TYPE_VBI, 0,
83                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
84                 &cx18_v4l2_enc_fops
85         },
86         {       /* CX18_ENC_STREAM_TYPE_PCM */
87                 "encoder PCM audio",
88                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
89                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
90                 &cx18_v4l2_enc_fops
91         },
92         {       /* CX18_ENC_STREAM_TYPE_IDX */
93                 "encoder IDX",
94                 VFL_TYPE_GRABBER, -1,
95                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
96                 &cx18_v4l2_enc_fops
97         },
98         {       /* CX18_ENC_STREAM_TYPE_RAD */
99                 "encoder radio",
100                 VFL_TYPE_RADIO, 0,
101                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
102                 &cx18_v4l2_enc_fops
103         },
104 };
105
106 static void cx18_stream_init(struct cx18 *cx, int type)
107 {
108         struct cx18_stream *s = &cx->streams[type];
109         struct video_device *dev = s->v4l2dev;
110         u32 max_size = cx->options.megabytes[type] * 1024 * 1024;
111
112         /* we need to keep v4l2dev, so restore it afterwards */
113         memset(s, 0, sizeof(*s));
114         s->v4l2dev = dev;
115
116         /* initialize cx18_stream fields */
117         s->cx = cx;
118         s->type = type;
119         s->name = cx18_stream_info[type].name;
120         s->handle = 0xffffffff;
121
122         s->dma = cx18_stream_info[type].dma;
123         s->buf_size = cx->stream_buf_size[type];
124         if (s->buf_size)
125                 s->buffers = max_size / s->buf_size;
126         if (s->buffers > 63) {
127                 /* Each stream has a maximum of 63 buffers,
128                    ensure we do not exceed that. */
129                 s->buffers = 63;
130                 s->buf_size = (max_size / s->buffers) & ~0xfff;
131         }
132         spin_lock_init(&s->qlock);
133         init_waitqueue_head(&s->waitq);
134         s->id = -1;
135         cx18_queue_init(&s->q_free);
136         cx18_queue_init(&s->q_full);
137         cx18_queue_init(&s->q_io);
138 }
139
140 static int cx18_prep_dev(struct cx18 *cx, int type)
141 {
142         struct cx18_stream *s = &cx->streams[type];
143         u32 cap = cx->v4l2_cap;
144         int minor_offset = cx18_stream_info[type].minor_offset;
145         int minor;
146
147         /* These four fields are always initialized. If v4l2dev == NULL, then
148            this stream is not in use. In that case no other fields but these
149            four can be used. */
150         s->v4l2dev = NULL;
151         s->cx = cx;
152         s->type = type;
153         s->name = cx18_stream_info[type].name;
154
155         /* Check whether the radio is supported */
156         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
157                 return 0;
158
159         /* Check whether VBI is supported */
160         if (type == CX18_ENC_STREAM_TYPE_VBI &&
161             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
162                 return 0;
163
164         /* card number + user defined offset + device offset */
165         minor = cx->num + cx18_first_minor + minor_offset;
166
167         /* User explicitly selected 0 buffers for these streams, so don't
168            create them. */
169         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
170             cx->options.megabytes[type] == 0) {
171                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
172                 return 0;
173         }
174
175         cx18_stream_init(cx, type);
176
177         if (minor_offset == -1)
178                 return 0;
179
180         /* allocate and initialize the v4l2 video device structure */
181         s->v4l2dev = video_device_alloc();
182         if (s->v4l2dev == NULL) {
183                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
184                                 s->name);
185                 return -ENOMEM;
186         }
187
188         s->v4l2dev->type =
189                 VID_TYPE_CAPTURE | VID_TYPE_TUNER | VID_TYPE_TELETEXT |
190                 VID_TYPE_CLIPPING | VID_TYPE_SCALES | VID_TYPE_MPEG_ENCODER;
191         snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18%d %s",
192                         cx->num, s->name);
193
194         s->v4l2dev->minor = minor;
195         s->v4l2dev->dev = &cx->dev->dev;
196         s->v4l2dev->fops = cx18_stream_info[type].fops;
197         s->v4l2dev->release = video_device_release;
198
199         return 0;
200 }
201
202 /* Initialize v4l2 variables and register v4l2 devices */
203 int cx18_streams_setup(struct cx18 *cx)
204 {
205         int type;
206
207         /* Setup V4L2 Devices */
208         for (type = 0; type < CX18_MAX_STREAMS; type++) {
209                 /* Prepare device */
210                 if (cx18_prep_dev(cx, type))
211                         break;
212
213                 /* Allocate Stream */
214                 if (cx18_stream_alloc(&cx->streams[type]))
215                         break;
216         }
217         if (type == CX18_MAX_STREAMS)
218                 return 0;
219
220         /* One or more streams could not be initialized. Clean 'em all up. */
221         cx18_streams_cleanup(cx);
222         return -ENOMEM;
223 }
224
225 static int cx18_reg_dev(struct cx18 *cx, int type)
226 {
227         struct cx18_stream *s = &cx->streams[type];
228         int vfl_type = cx18_stream_info[type].vfl_type;
229         int minor;
230
231         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
232          * We need a VFL_TYPE_TS defined.
233          */
234         if (strcmp("TS", s->name) == 0) {
235                 /* just return if no DVB is supported */
236                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
237                         return 0;
238                 if (cx18_dvb_register(s) < 0) {
239                         CX18_ERR("DVB failed to register\n");
240                         return -EINVAL;
241                 }
242         }
243
244         if (s->v4l2dev == NULL)
245                 return 0;
246
247         minor = s->v4l2dev->minor;
248
249         /* Register device. First try the desired minor, then any free one. */
250         if (video_register_device(s->v4l2dev, vfl_type, minor) &&
251                         video_register_device(s->v4l2dev, vfl_type, -1)) {
252                 CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
253                         s->name, minor);
254                 video_device_release(s->v4l2dev);
255                 s->v4l2dev = NULL;
256                 return -ENOMEM;
257         }
258         minor = s->v4l2dev->minor;
259
260         switch (vfl_type) {
261         case VFL_TYPE_GRABBER:
262                 CX18_INFO("Registered device video%d for %s (%d MB)\n",
263                         minor, s->name, cx->options.megabytes[type]);
264                 break;
265
266         case VFL_TYPE_RADIO:
267                 CX18_INFO("Registered device radio%d for %s\n",
268                         minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
269                 break;
270
271         case VFL_TYPE_VBI:
272                 if (cx->options.megabytes[type])
273                         CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
274                                 minor - MINOR_VFL_TYPE_VBI_MIN,
275                                 s->name, cx->options.megabytes[type]);
276                 else
277                         CX18_INFO("Registered device vbi%d for %s\n",
278                                 minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
279                 break;
280         }
281
282         return 0;
283 }
284
285 /* Register v4l2 devices */
286 int cx18_streams_register(struct cx18 *cx)
287 {
288         int type;
289         int err = 0;
290
291         /* Register V4L2 devices */
292         for (type = 0; type < CX18_MAX_STREAMS; type++)
293                 err |= cx18_reg_dev(cx, type);
294
295         if (err == 0)
296                 return 0;
297
298         /* One or more streams could not be initialized. Clean 'em all up. */
299         cx18_streams_cleanup(cx);
300         return -ENOMEM;
301 }
302
303 /* Unregister v4l2 devices */
304 void cx18_streams_cleanup(struct cx18 *cx)
305 {
306         struct video_device *vdev;
307         int type;
308
309         /* Teardown all streams */
310         for (type = 0; type < CX18_MAX_STREAMS; type++) {
311                 if (cx->streams[type].dvb.enabled)
312                         cx18_dvb_unregister(&cx->streams[type]);
313
314                 vdev = cx->streams[type].v4l2dev;
315
316                 cx->streams[type].v4l2dev = NULL;
317                 if (vdev == NULL)
318                         continue;
319
320                 cx18_stream_free(&cx->streams[type]);
321
322                 /* Unregister device */
323                 video_unregister_device(vdev);
324         }
325 }
326
327 static void cx18_vbi_setup(struct cx18_stream *s)
328 {
329         struct cx18 *cx = s->cx;
330         int raw = cx->vbi.sliced_in->service_set == 0;
331         u32 data[CX2341X_MBOX_MAX_DATA];
332         int lines;
333
334         if (cx->is_60hz) {
335                 cx->vbi.count = 12;
336                 cx->vbi.start[0] = 10;
337                 cx->vbi.start[1] = 273;
338         } else {        /* PAL/SECAM */
339                 cx->vbi.count = 18;
340                 cx->vbi.start[0] = 6;
341                 cx->vbi.start[1] = 318;
342         }
343
344         /* setup VBI registers */
345         cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
346
347         /* determine number of lines and total number of VBI bytes.
348            A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
349            The '- 1' byte is probably an unused U or V byte. Or something...
350            A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
351            header, 42 data bytes + checksum (to be confirmed) */
352         if (raw) {
353                 lines = cx->vbi.count * 2;
354         } else {
355                 lines = cx->is_60hz ? 24 : 38;
356                 if (cx->is_60hz)
357                         lines += 2;
358         }
359
360         cx->vbi.enc_size = lines *
361                 (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
362
363         data[0] = s->handle;
364         /* Lines per field */
365         data[1] = (lines / 2) | ((lines / 2) << 16);
366         /* bytes per line */
367         data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
368         /* Every X number of frames a VBI interrupt arrives
369            (frames as in 25 or 30 fps) */
370         data[3] = 1;
371         /* Setup VBI for the cx25840 digitizer */
372         if (raw) {
373                 data[4] = 0x20602060;
374                 data[5] = 0x30703070;
375         } else {
376                 data[4] = 0xB0F0B0F0;
377                 data[5] = 0xA0E0A0E0;
378         }
379
380         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
381                         data[0], data[1], data[2], data[3], data[4], data[5]);
382
383         if (s->type == CX18_ENC_STREAM_TYPE_VBI)
384                 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
385 }
386
387 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
388 {
389         u32 data[MAX_MB_ARGUMENTS];
390         struct cx18 *cx = s->cx;
391         struct list_head *p;
392         int ts = 0;
393         int captype = 0;
394
395         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
396                 return -EINVAL;
397
398         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
399
400         switch (s->type) {
401         case CX18_ENC_STREAM_TYPE_MPG:
402                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
403                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
404                 cx->dualwatch_jiffies = jiffies;
405                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
406                 cx->search_pack_header = 0;
407                 break;
408
409         case CX18_ENC_STREAM_TYPE_TS:
410                 captype = CAPTURE_CHANNEL_TYPE_TS;
411                 ts = 1;
412                 break;
413         case CX18_ENC_STREAM_TYPE_YUV:
414                 captype = CAPTURE_CHANNEL_TYPE_YUV;
415                 break;
416         case CX18_ENC_STREAM_TYPE_PCM:
417                 captype = CAPTURE_CHANNEL_TYPE_PCM;
418                 break;
419         case CX18_ENC_STREAM_TYPE_VBI:
420                 captype = cx->vbi.sliced_in->service_set ?
421                     CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
422                 cx->vbi.frame = 0;
423                 cx->vbi.inserted_frame = 0;
424                 memset(cx->vbi.sliced_mpeg_size,
425                         0, sizeof(cx->vbi.sliced_mpeg_size));
426                 break;
427         default:
428                 return -EINVAL;
429         }
430         s->buffers_stolen = 0;
431
432         /* mute/unmute video */
433         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
434                   s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
435
436         /* Clear Streamoff flags in case left from last capture */
437         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
438
439         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
440         s->handle = data[0];
441         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
442
443         if (atomic_read(&cx->capturing) == 0 && !ts) {
444                 /* Stuff from Windows, we don't know what it is */
445                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
446                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
447                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
448                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
449                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
450
451                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
452                                s->handle, cx->digitizer, cx->digitizer);
453
454                 /* Setup VBI */
455                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
456                         cx18_vbi_setup(s);
457
458                 /* assign program index info.
459                    Mask 7: select I/P/B, Num_req: 400 max */
460                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
461
462                 /* Setup API for Stream */
463                 cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
464         }
465
466         if (atomic_read(&cx->capturing) == 0) {
467                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
468                 write_reg(7, CX18_DSP0_INTERRUPT_MASK);
469         }
470
471         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
472                 (void *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
473                 (void *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
474
475         list_for_each(p, &s->q_free.list) {
476                 struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
477
478                 writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
479                 writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
480                 cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
481                         (void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, 1,
482                         buf->id, s->buf_size);
483         }
484         /* begin_capture */
485         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
486                 CX18_DEBUG_WARN("Error starting capture!\n");
487                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
488                 return -EINVAL;
489         }
490
491         /* you're live! sit back and await interrupts :) */
492         atomic_inc(&cx->capturing);
493         return 0;
494 }
495
496 void cx18_stop_all_captures(struct cx18 *cx)
497 {
498         int i;
499
500         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
501                 struct cx18_stream *s = &cx->streams[i];
502
503                 if (s->v4l2dev == NULL && s->dvb.enabled == 0)
504                         continue;
505                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
506                         cx18_stop_v4l2_encode_stream(s, 0);
507         }
508 }
509
510 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
511 {
512         struct cx18 *cx = s->cx;
513         unsigned long then;
514
515         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
516                 return -EINVAL;
517
518         /* This function assumes that you are allowed to stop the capture
519            and that we are actually capturing */
520
521         CX18_DEBUG_INFO("Stop Capture\n");
522
523         if (atomic_read(&cx->capturing) == 0)
524                 return 0;
525
526         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
527                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
528         else
529                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
530
531         then = jiffies;
532
533         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
534                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
535         }
536
537         atomic_dec(&cx->capturing);
538
539         /* Clear capture and no-read bits */
540         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
541
542         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
543         s->handle = 0xffffffff;
544
545         if (atomic_read(&cx->capturing) > 0)
546                 return 0;
547
548         write_reg(5, CX18_DSP0_INTERRUPT_MASK);
549         wake_up(&s->waitq);
550
551         return 0;
552 }
553
554 u32 cx18_find_handle(struct cx18 *cx)
555 {
556         int i;
557
558         /* find first available handle to be used for global settings */
559         for (i = 0; i < CX18_MAX_STREAMS; i++) {
560                 struct cx18_stream *s = &cx->streams[i];
561
562                 if (s->v4l2dev && s->handle)
563                         return s->handle;
564         }
565         return 0;
566 }