Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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         /* 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         snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18-%d",
191                         cx->num);
192
193         s->v4l2dev->minor = minor;
194         s->v4l2dev->parent = &cx->dev->dev;
195         s->v4l2dev->fops = cx18_stream_info[type].fops;
196         s->v4l2dev->release = video_device_release;
197         s->v4l2dev->tvnorms = V4L2_STD_ALL;
198         cx18_set_funcs(s->v4l2dev);
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, 0);
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, 1);
300         return -ENOMEM;
301 }
302
303 /* Unregister v4l2 devices */
304 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
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                         cx->streams[type].dvb.enabled = false;
314                 }
315
316                 vdev = cx->streams[type].v4l2dev;
317
318                 cx->streams[type].v4l2dev = NULL;
319                 if (vdev == NULL)
320                         continue;
321
322                 cx18_stream_free(&cx->streams[type]);
323
324                 /* Unregister or release device */
325                 if (unregister)
326                         video_unregister_device(vdev);
327                 else
328                         video_device_release(vdev);
329         }
330 }
331
332 static void cx18_vbi_setup(struct cx18_stream *s)
333 {
334         struct cx18 *cx = s->cx;
335         int raw = cx->vbi.sliced_in->service_set == 0;
336         u32 data[CX2341X_MBOX_MAX_DATA];
337         int lines;
338
339         if (cx->is_60hz) {
340                 cx->vbi.count = 12;
341                 cx->vbi.start[0] = 10;
342                 cx->vbi.start[1] = 273;
343         } else {        /* PAL/SECAM */
344                 cx->vbi.count = 18;
345                 cx->vbi.start[0] = 6;
346                 cx->vbi.start[1] = 318;
347         }
348
349         /* setup VBI registers */
350         cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
351
352         /* determine number of lines and total number of VBI bytes.
353            A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
354            The '- 1' byte is probably an unused U or V byte. Or something...
355            A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
356            header, 42 data bytes + checksum (to be confirmed) */
357         if (raw) {
358                 lines = cx->vbi.count * 2;
359         } else {
360                 lines = cx->is_60hz ? 24 : 38;
361                 if (cx->is_60hz)
362                         lines += 2;
363         }
364
365         cx->vbi.enc_size = lines *
366                 (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
367
368         data[0] = s->handle;
369         /* Lines per field */
370         data[1] = (lines / 2) | ((lines / 2) << 16);
371         /* bytes per line */
372         data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
373         /* Every X number of frames a VBI interrupt arrives
374            (frames as in 25 or 30 fps) */
375         data[3] = 1;
376         /* Setup VBI for the cx25840 digitizer */
377         if (raw) {
378                 data[4] = 0x20602060;
379                 data[5] = 0x30703070;
380         } else {
381                 data[4] = 0xB0F0B0F0;
382                 data[5] = 0xA0E0A0E0;
383         }
384
385         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
386                         data[0], data[1], data[2], data[3], data[4], data[5]);
387
388         if (s->type == CX18_ENC_STREAM_TYPE_VBI)
389                 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
390 }
391
392 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
393 {
394         u32 data[MAX_MB_ARGUMENTS];
395         struct cx18 *cx = s->cx;
396         struct list_head *p;
397         int ts = 0;
398         int captype = 0;
399
400         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
401                 return -EINVAL;
402
403         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
404
405         switch (s->type) {
406         case CX18_ENC_STREAM_TYPE_MPG:
407                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
408                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
409                 cx->dualwatch_jiffies = jiffies;
410                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
411                 cx->search_pack_header = 0;
412                 break;
413
414         case CX18_ENC_STREAM_TYPE_TS:
415                 captype = CAPTURE_CHANNEL_TYPE_TS;
416                 ts = 1;
417                 break;
418         case CX18_ENC_STREAM_TYPE_YUV:
419                 captype = CAPTURE_CHANNEL_TYPE_YUV;
420                 break;
421         case CX18_ENC_STREAM_TYPE_PCM:
422                 captype = CAPTURE_CHANNEL_TYPE_PCM;
423                 break;
424         case CX18_ENC_STREAM_TYPE_VBI:
425                 captype = cx->vbi.sliced_in->service_set ?
426                     CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
427                 cx->vbi.frame = 0;
428                 cx->vbi.inserted_frame = 0;
429                 memset(cx->vbi.sliced_mpeg_size,
430                         0, sizeof(cx->vbi.sliced_mpeg_size));
431                 break;
432         default:
433                 return -EINVAL;
434         }
435         s->buffers_stolen = 0;
436
437         /* mute/unmute video */
438         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
439                   s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
440
441         /* Clear Streamoff flags in case left from last capture */
442         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
443
444         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
445         s->handle = data[0];
446         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
447
448         if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
449                 /* Stuff from Windows, we don't know what it is */
450                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
451                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
452                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
453                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
454                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
455
456                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
457                                s->handle, cx->digitizer, cx->digitizer);
458
459                 /* Setup VBI */
460                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
461                         cx18_vbi_setup(s);
462
463                 /* assign program index info.
464                    Mask 7: select I/P/B, Num_req: 400 max */
465                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
466
467                 /* Setup API for Stream */
468                 cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
469         }
470
471         if (atomic_read(&cx->tot_capturing) == 0) {
472                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
473                 write_reg(7, CX18_DSP0_INTERRUPT_MASK);
474         }
475
476         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
477                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
478                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
479
480         list_for_each(p, &s->q_free.list) {
481                 struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
482
483                 writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
484                 writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
485                 cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
486                         (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
487                         1, buf->id, s->buf_size);
488         }
489         /* begin_capture */
490         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
491                 CX18_DEBUG_WARN("Error starting capture!\n");
492                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
493                 return -EINVAL;
494         }
495
496         /* you're live! sit back and await interrupts :) */
497         if (!ts)
498                 atomic_inc(&cx->ana_capturing);
499         atomic_inc(&cx->tot_capturing);
500         return 0;
501 }
502
503 void cx18_stop_all_captures(struct cx18 *cx)
504 {
505         int i;
506
507         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
508                 struct cx18_stream *s = &cx->streams[i];
509
510                 if (s->v4l2dev == NULL && s->dvb.enabled == 0)
511                         continue;
512                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
513                         cx18_stop_v4l2_encode_stream(s, 0);
514         }
515 }
516
517 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
518 {
519         struct cx18 *cx = s->cx;
520         unsigned long then;
521
522         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
523                 return -EINVAL;
524
525         /* This function assumes that you are allowed to stop the capture
526            and that we are actually capturing */
527
528         CX18_DEBUG_INFO("Stop Capture\n");
529
530         if (atomic_read(&cx->tot_capturing) == 0)
531                 return 0;
532
533         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
534                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
535         else
536                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
537
538         then = jiffies;
539
540         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
541                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
542         }
543
544         if (s->type != CX18_ENC_STREAM_TYPE_TS)
545                 atomic_dec(&cx->ana_capturing);
546         atomic_dec(&cx->tot_capturing);
547
548         /* Clear capture and no-read bits */
549         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
550
551         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
552         s->handle = 0xffffffff;
553
554         if (atomic_read(&cx->tot_capturing) > 0)
555                 return 0;
556
557         write_reg(5, CX18_DSP0_INTERRUPT_MASK);
558         wake_up(&s->waitq);
559
560         return 0;
561 }
562
563 u32 cx18_find_handle(struct cx18 *cx)
564 {
565         int i;
566
567         /* find first available handle to be used for global settings */
568         for (i = 0; i < CX18_MAX_STREAMS; i++) {
569                 struct cx18_stream *s = &cx->streams[i];
570
571                 if (s->v4l2dev && s->handle)
572                         return s->handle;
573         }
574         return 0;
575 }