1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Driver for the NXP SAA7164 PCIe bridge |
4 | * |
5 | * Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com> |
6 | */ |
7 | |
8 | #include "saa7164.h" |
9 | |
10 | /* Take the encoder configuration from the port struct and |
11 | * flush it to the hardware. |
12 | */ |
13 | static void saa7164_vbi_configure(struct saa7164_port *port) |
14 | { |
15 | struct saa7164_dev *dev = port->dev; |
16 | dprintk(DBGLVL_VBI, "%s()\n" , __func__); |
17 | |
18 | port->vbi_params.width = port->enc_port->width; |
19 | port->vbi_params.height = port->enc_port->height; |
20 | port->vbi_params.is_50hz = |
21 | (port->enc_port->encodernorm.id & V4L2_STD_625_50) != 0; |
22 | |
23 | /* Set up the DIF (enable it) for analog mode by default */ |
24 | saa7164_api_initialize_dif(port); |
25 | dprintk(DBGLVL_VBI, "%s() ends\n" , __func__); |
26 | } |
27 | |
28 | static int saa7164_vbi_buffers_dealloc(struct saa7164_port *port) |
29 | { |
30 | struct list_head *c, *n, *p, *q, *l, *v; |
31 | struct saa7164_dev *dev = port->dev; |
32 | struct saa7164_buffer *buf; |
33 | struct saa7164_user_buffer *ubuf; |
34 | |
35 | /* Remove any allocated buffers */ |
36 | mutex_lock(&port->dmaqueue_lock); |
37 | |
38 | dprintk(DBGLVL_VBI, "%s(port=%d) dmaqueue\n" , __func__, port->nr); |
39 | list_for_each_safe(c, n, &port->dmaqueue.list) { |
40 | buf = list_entry(c, struct saa7164_buffer, list); |
41 | list_del(entry: c); |
42 | saa7164_buffer_dealloc(buf); |
43 | } |
44 | |
45 | dprintk(DBGLVL_VBI, "%s(port=%d) used\n" , __func__, port->nr); |
46 | list_for_each_safe(p, q, &port->list_buf_used.list) { |
47 | ubuf = list_entry(p, struct saa7164_user_buffer, list); |
48 | list_del(entry: p); |
49 | saa7164_buffer_dealloc_user(buf: ubuf); |
50 | } |
51 | |
52 | dprintk(DBGLVL_VBI, "%s(port=%d) free\n" , __func__, port->nr); |
53 | list_for_each_safe(l, v, &port->list_buf_free.list) { |
54 | ubuf = list_entry(l, struct saa7164_user_buffer, list); |
55 | list_del(entry: l); |
56 | saa7164_buffer_dealloc_user(buf: ubuf); |
57 | } |
58 | |
59 | mutex_unlock(lock: &port->dmaqueue_lock); |
60 | dprintk(DBGLVL_VBI, "%s(port=%d) done\n" , __func__, port->nr); |
61 | |
62 | return 0; |
63 | } |
64 | |
65 | /* Dynamic buffer switch at vbi start time */ |
66 | static int saa7164_vbi_buffers_alloc(struct saa7164_port *port) |
67 | { |
68 | struct saa7164_dev *dev = port->dev; |
69 | struct saa7164_buffer *buf; |
70 | struct saa7164_user_buffer *ubuf; |
71 | struct tmHWStreamParameters *params = &port->hw_streamingparams; |
72 | int result = -ENODEV, i; |
73 | int len = 0; |
74 | |
75 | dprintk(DBGLVL_VBI, "%s()\n" , __func__); |
76 | |
77 | /* TODO: NTSC SPECIFIC */ |
78 | /* Init and establish defaults */ |
79 | params->samplesperline = 1440; |
80 | params->numberoflines = 12; |
81 | params->numberoflines = 18; |
82 | params->pitch = 1600; |
83 | params->pitch = 1440; |
84 | params->numpagetables = 2 + |
85 | ((params->numberoflines * params->pitch) / PAGE_SIZE); |
86 | params->bitspersample = 8; |
87 | params->linethreshold = 0; |
88 | params->pagetablelistvirt = NULL; |
89 | params->pagetablelistphys = NULL; |
90 | params->numpagetableentries = port->hwcfg.buffercount; |
91 | |
92 | /* Allocate the PCI resources, buffers (hard) */ |
93 | for (i = 0; i < port->hwcfg.buffercount; i++) { |
94 | buf = saa7164_buffer_alloc(port, |
95 | len: params->numberoflines * |
96 | params->pitch); |
97 | |
98 | if (!buf) { |
99 | printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n" , |
100 | __func__, result); |
101 | result = -ENOMEM; |
102 | goto failed; |
103 | } else { |
104 | |
105 | mutex_lock(&port->dmaqueue_lock); |
106 | list_add_tail(new: &buf->list, head: &port->dmaqueue.list); |
107 | mutex_unlock(lock: &port->dmaqueue_lock); |
108 | |
109 | } |
110 | } |
111 | |
112 | /* Allocate some kernel buffers for copying |
113 | * to userpsace. |
114 | */ |
115 | len = params->numberoflines * params->pitch; |
116 | |
117 | if (vbi_buffers < 16) |
118 | vbi_buffers = 16; |
119 | if (vbi_buffers > 512) |
120 | vbi_buffers = 512; |
121 | |
122 | for (i = 0; i < vbi_buffers; i++) { |
123 | |
124 | ubuf = saa7164_buffer_alloc_user(dev, len); |
125 | if (ubuf) { |
126 | mutex_lock(&port->dmaqueue_lock); |
127 | list_add_tail(new: &ubuf->list, head: &port->list_buf_free.list); |
128 | mutex_unlock(lock: &port->dmaqueue_lock); |
129 | } |
130 | |
131 | } |
132 | |
133 | result = 0; |
134 | |
135 | failed: |
136 | return result; |
137 | } |
138 | |
139 | |
140 | static int saa7164_vbi_initialize(struct saa7164_port *port) |
141 | { |
142 | saa7164_vbi_configure(port); |
143 | return 0; |
144 | } |
145 | |
146 | /* -- V4L2 --------------------------------------------------------- */ |
147 | static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id) |
148 | { |
149 | struct saa7164_vbi_fh *fh = file->private_data; |
150 | |
151 | return saa7164_s_std(port: fh->port->enc_port, id); |
152 | } |
153 | |
154 | static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id) |
155 | { |
156 | struct saa7164_encoder_fh *fh = file->private_data; |
157 | |
158 | return saa7164_g_std(port: fh->port->enc_port, id); |
159 | } |
160 | |
161 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
162 | { |
163 | struct saa7164_vbi_fh *fh = file->private_data; |
164 | |
165 | return saa7164_g_input(port: fh->port->enc_port, i); |
166 | } |
167 | |
168 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
169 | { |
170 | struct saa7164_vbi_fh *fh = file->private_data; |
171 | |
172 | return saa7164_s_input(port: fh->port->enc_port, i); |
173 | } |
174 | |
175 | static int vidioc_g_frequency(struct file *file, void *priv, |
176 | struct v4l2_frequency *f) |
177 | { |
178 | struct saa7164_vbi_fh *fh = file->private_data; |
179 | |
180 | return saa7164_g_frequency(port: fh->port->enc_port, f); |
181 | } |
182 | |
183 | static int vidioc_s_frequency(struct file *file, void *priv, |
184 | const struct v4l2_frequency *f) |
185 | { |
186 | struct saa7164_vbi_fh *fh = file->private_data; |
187 | int ret = saa7164_s_frequency(port: fh->port->enc_port, f); |
188 | |
189 | if (ret == 0) |
190 | saa7164_vbi_initialize(port: fh->port); |
191 | return ret; |
192 | } |
193 | |
194 | static int vidioc_querycap(struct file *file, void *priv, |
195 | struct v4l2_capability *cap) |
196 | { |
197 | struct saa7164_vbi_fh *fh = file->private_data; |
198 | struct saa7164_port *port = fh->port; |
199 | struct saa7164_dev *dev = port->dev; |
200 | |
201 | strscpy(cap->driver, dev->name, sizeof(cap->driver)); |
202 | strscpy(cap->card, saa7164_boards[dev->board].name, |
203 | sizeof(cap->card)); |
204 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
205 | V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | |
206 | V4L2_CAP_DEVICE_CAPS; |
207 | return 0; |
208 | } |
209 | |
210 | static int saa7164_vbi_stop_port(struct saa7164_port *port) |
211 | { |
212 | struct saa7164_dev *dev = port->dev; |
213 | int ret; |
214 | |
215 | ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP); |
216 | if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { |
217 | printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n" , |
218 | __func__, ret); |
219 | ret = -EIO; |
220 | } else { |
221 | dprintk(DBGLVL_VBI, "%s() Stopped\n" , __func__); |
222 | ret = 0; |
223 | } |
224 | |
225 | return ret; |
226 | } |
227 | |
228 | static int saa7164_vbi_acquire_port(struct saa7164_port *port) |
229 | { |
230 | struct saa7164_dev *dev = port->dev; |
231 | int ret; |
232 | |
233 | ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); |
234 | if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { |
235 | printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n" , |
236 | __func__, ret); |
237 | ret = -EIO; |
238 | } else { |
239 | dprintk(DBGLVL_VBI, "%s() Acquired\n" , __func__); |
240 | ret = 0; |
241 | } |
242 | |
243 | return ret; |
244 | } |
245 | |
246 | static int saa7164_vbi_pause_port(struct saa7164_port *port) |
247 | { |
248 | struct saa7164_dev *dev = port->dev; |
249 | int ret; |
250 | |
251 | ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); |
252 | if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { |
253 | printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n" , |
254 | __func__, ret); |
255 | ret = -EIO; |
256 | } else { |
257 | dprintk(DBGLVL_VBI, "%s() Paused\n" , __func__); |
258 | ret = 0; |
259 | } |
260 | |
261 | return ret; |
262 | } |
263 | |
264 | /* Firmware is very windows centric, meaning you have to transition |
265 | * the part through AVStream / KS Windows stages, forwards or backwards. |
266 | * States are: stopped, acquired (h/w), paused, started. |
267 | * We have to leave here will all of the soft buffers on the free list, |
268 | * else the cfg_post() func won't have soft buffers to correctly configure. |
269 | */ |
270 | static int saa7164_vbi_stop_streaming(struct saa7164_port *port) |
271 | { |
272 | struct saa7164_dev *dev = port->dev; |
273 | struct saa7164_buffer *buf; |
274 | struct saa7164_user_buffer *ubuf; |
275 | struct list_head *c, *n; |
276 | int ret; |
277 | |
278 | dprintk(DBGLVL_VBI, "%s(port=%d)\n" , __func__, port->nr); |
279 | |
280 | ret = saa7164_vbi_pause_port(port); |
281 | ret = saa7164_vbi_acquire_port(port); |
282 | ret = saa7164_vbi_stop_port(port); |
283 | |
284 | dprintk(DBGLVL_VBI, "%s(port=%d) Hardware stopped\n" , __func__, |
285 | port->nr); |
286 | |
287 | /* Reset the state of any allocated buffer resources */ |
288 | mutex_lock(&port->dmaqueue_lock); |
289 | |
290 | /* Reset the hard and soft buffer state */ |
291 | list_for_each_safe(c, n, &port->dmaqueue.list) { |
292 | buf = list_entry(c, struct saa7164_buffer, list); |
293 | buf->flags = SAA7164_BUFFER_FREE; |
294 | buf->pos = 0; |
295 | } |
296 | |
297 | list_for_each_safe(c, n, &port->list_buf_used.list) { |
298 | ubuf = list_entry(c, struct saa7164_user_buffer, list); |
299 | ubuf->pos = 0; |
300 | list_move_tail(list: &ubuf->list, head: &port->list_buf_free.list); |
301 | } |
302 | |
303 | mutex_unlock(lock: &port->dmaqueue_lock); |
304 | |
305 | /* Free any allocated resources */ |
306 | saa7164_vbi_buffers_dealloc(port); |
307 | |
308 | dprintk(DBGLVL_VBI, "%s(port=%d) Released\n" , __func__, port->nr); |
309 | |
310 | return ret; |
311 | } |
312 | |
313 | static int saa7164_vbi_start_streaming(struct saa7164_port *port) |
314 | { |
315 | struct saa7164_dev *dev = port->dev; |
316 | int result, ret = 0; |
317 | |
318 | dprintk(DBGLVL_VBI, "%s(port=%d)\n" , __func__, port->nr); |
319 | |
320 | port->done_first_interrupt = 0; |
321 | |
322 | /* allocate all of the PCIe DMA buffer resources on the fly, |
323 | * allowing switching between TS and PS payloads without |
324 | * requiring a complete driver reload. |
325 | */ |
326 | saa7164_vbi_buffers_alloc(port); |
327 | |
328 | /* Configure the encoder with any cache values */ |
329 | #if 0 |
330 | saa7164_api_set_encoder(port); |
331 | saa7164_api_get_encoder(port); |
332 | #endif |
333 | |
334 | /* Place the empty buffers on the hardware */ |
335 | saa7164_buffer_cfg_port(port); |
336 | |
337 | /* Negotiate format */ |
338 | if (saa7164_api_set_vbi_format(port) != SAA_OK) { |
339 | printk(KERN_ERR "%s() No supported VBI format\n" , __func__); |
340 | ret = -EIO; |
341 | goto out; |
342 | } |
343 | |
344 | /* Acquire the hardware */ |
345 | result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); |
346 | if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { |
347 | printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n" , |
348 | __func__, result); |
349 | |
350 | ret = -EIO; |
351 | goto out; |
352 | } else |
353 | dprintk(DBGLVL_VBI, "%s() Acquired\n" , __func__); |
354 | |
355 | /* Pause the hardware */ |
356 | result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); |
357 | if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { |
358 | printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n" , |
359 | __func__, result); |
360 | |
361 | /* Stop the hardware, regardless */ |
362 | result = saa7164_vbi_stop_port(port); |
363 | if (result != SAA_OK) { |
364 | printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n" , |
365 | __func__, result); |
366 | } |
367 | |
368 | ret = -EIO; |
369 | goto out; |
370 | } else |
371 | dprintk(DBGLVL_VBI, "%s() Paused\n" , __func__); |
372 | |
373 | /* Start the hardware */ |
374 | result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN); |
375 | if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { |
376 | printk(KERN_ERR "%s() run transition failed, result = 0x%x\n" , |
377 | __func__, result); |
378 | |
379 | /* Stop the hardware, regardless */ |
380 | result = saa7164_vbi_acquire_port(port); |
381 | result = saa7164_vbi_stop_port(port); |
382 | if (result != SAA_OK) { |
383 | printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n" , |
384 | __func__, result); |
385 | } |
386 | |
387 | ret = -EIO; |
388 | } else |
389 | dprintk(DBGLVL_VBI, "%s() Running\n" , __func__); |
390 | |
391 | out: |
392 | return ret; |
393 | } |
394 | |
395 | static int saa7164_vbi_fmt(struct file *file, void *priv, |
396 | struct v4l2_format *f) |
397 | { |
398 | /* ntsc */ |
399 | f->fmt.vbi.samples_per_line = 1440; |
400 | f->fmt.vbi.sampling_rate = 27000000; |
401 | f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; |
402 | f->fmt.vbi.offset = 0; |
403 | f->fmt.vbi.flags = 0; |
404 | f->fmt.vbi.start[0] = 10; |
405 | f->fmt.vbi.count[0] = 18; |
406 | f->fmt.vbi.start[1] = 263 + 10 + 1; |
407 | f->fmt.vbi.count[1] = 18; |
408 | memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved)); |
409 | return 0; |
410 | } |
411 | |
412 | static int fops_open(struct file *file) |
413 | { |
414 | struct saa7164_dev *dev; |
415 | struct saa7164_port *port; |
416 | struct saa7164_vbi_fh *fh; |
417 | |
418 | port = (struct saa7164_port *)video_get_drvdata(vdev: video_devdata(file)); |
419 | if (!port) |
420 | return -ENODEV; |
421 | |
422 | dev = port->dev; |
423 | |
424 | dprintk(DBGLVL_VBI, "%s()\n" , __func__); |
425 | |
426 | /* allocate + initialize per filehandle data */ |
427 | fh = kzalloc(size: sizeof(*fh), GFP_KERNEL); |
428 | if (NULL == fh) |
429 | return -ENOMEM; |
430 | |
431 | fh->port = port; |
432 | v4l2_fh_init(fh: &fh->fh, vdev: video_devdata(file)); |
433 | v4l2_fh_add(fh: &fh->fh); |
434 | file->private_data = fh; |
435 | |
436 | return 0; |
437 | } |
438 | |
439 | static int fops_release(struct file *file) |
440 | { |
441 | struct saa7164_vbi_fh *fh = file->private_data; |
442 | struct saa7164_port *port = fh->port; |
443 | struct saa7164_dev *dev = port->dev; |
444 | |
445 | dprintk(DBGLVL_VBI, "%s()\n" , __func__); |
446 | |
447 | /* Shut device down on last close */ |
448 | if (atomic_cmpxchg(v: &fh->v4l_reading, old: 1, new: 0) == 1) { |
449 | if (atomic_dec_return(v: &port->v4l_reader_count) == 0) { |
450 | /* stop vbi capture then cancel buffers */ |
451 | saa7164_vbi_stop_streaming(port); |
452 | } |
453 | } |
454 | |
455 | v4l2_fh_del(fh: &fh->fh); |
456 | v4l2_fh_exit(fh: &fh->fh); |
457 | kfree(objp: fh); |
458 | |
459 | return 0; |
460 | } |
461 | |
462 | static struct |
463 | saa7164_user_buffer *saa7164_vbi_next_buf(struct saa7164_port *port) |
464 | { |
465 | struct saa7164_user_buffer *ubuf = NULL; |
466 | struct saa7164_dev *dev = port->dev; |
467 | u32 crc; |
468 | |
469 | mutex_lock(&port->dmaqueue_lock); |
470 | if (!list_empty(head: &port->list_buf_used.list)) { |
471 | ubuf = list_first_entry(&port->list_buf_used.list, |
472 | struct saa7164_user_buffer, list); |
473 | |
474 | if (crc_checking) { |
475 | crc = crc32(0, ubuf->data, ubuf->actual_size); |
476 | if (crc != ubuf->crc) { |
477 | printk(KERN_ERR "%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n" , |
478 | __func__, |
479 | ubuf, ubuf->crc, crc); |
480 | } |
481 | } |
482 | |
483 | } |
484 | mutex_unlock(lock: &port->dmaqueue_lock); |
485 | |
486 | dprintk(DBGLVL_VBI, "%s() returns %p\n" , __func__, ubuf); |
487 | |
488 | return ubuf; |
489 | } |
490 | |
491 | static ssize_t fops_read(struct file *file, char __user *buffer, |
492 | size_t count, loff_t *pos) |
493 | { |
494 | struct saa7164_vbi_fh *fh = file->private_data; |
495 | struct saa7164_port *port = fh->port; |
496 | struct saa7164_user_buffer *ubuf = NULL; |
497 | struct saa7164_dev *dev = port->dev; |
498 | int ret = 0; |
499 | int rem, cnt; |
500 | u8 *p; |
501 | |
502 | port->last_read_msecs_diff = port->last_read_msecs; |
503 | port->last_read_msecs = jiffies_to_msecs(j: jiffies); |
504 | port->last_read_msecs_diff = port->last_read_msecs - |
505 | port->last_read_msecs_diff; |
506 | |
507 | saa7164_histogram_update(hg: &port->read_interval, |
508 | val: port->last_read_msecs_diff); |
509 | |
510 | if (*pos) { |
511 | printk(KERN_ERR "%s() ESPIPE\n" , __func__); |
512 | return -ESPIPE; |
513 | } |
514 | |
515 | if (atomic_cmpxchg(v: &fh->v4l_reading, old: 0, new: 1) == 0) { |
516 | if (atomic_inc_return(v: &port->v4l_reader_count) == 1) { |
517 | |
518 | if (saa7164_vbi_initialize(port) < 0) { |
519 | printk(KERN_ERR "%s() EINVAL\n" , __func__); |
520 | return -EINVAL; |
521 | } |
522 | |
523 | saa7164_vbi_start_streaming(port); |
524 | msleep(msecs: 200); |
525 | } |
526 | } |
527 | |
528 | /* blocking wait for buffer */ |
529 | if ((file->f_flags & O_NONBLOCK) == 0) { |
530 | if (wait_event_interruptible(port->wait_read, |
531 | saa7164_vbi_next_buf(port))) { |
532 | printk(KERN_ERR "%s() ERESTARTSYS\n" , __func__); |
533 | return -ERESTARTSYS; |
534 | } |
535 | } |
536 | |
537 | /* Pull the first buffer from the used list */ |
538 | ubuf = saa7164_vbi_next_buf(port); |
539 | |
540 | while ((count > 0) && ubuf) { |
541 | |
542 | /* set remaining bytes to copy */ |
543 | rem = ubuf->actual_size - ubuf->pos; |
544 | cnt = rem > count ? count : rem; |
545 | |
546 | p = ubuf->data + ubuf->pos; |
547 | |
548 | dprintk(DBGLVL_VBI, |
549 | "%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n" , |
550 | __func__, (int)count, cnt, rem, ubuf, ubuf->pos); |
551 | |
552 | if (copy_to_user(to: buffer, from: p, n: cnt)) { |
553 | printk(KERN_ERR "%s() copy_to_user failed\n" , __func__); |
554 | if (!ret) { |
555 | printk(KERN_ERR "%s() EFAULT\n" , __func__); |
556 | ret = -EFAULT; |
557 | } |
558 | goto err; |
559 | } |
560 | |
561 | ubuf->pos += cnt; |
562 | count -= cnt; |
563 | buffer += cnt; |
564 | ret += cnt; |
565 | |
566 | if (ubuf->pos > ubuf->actual_size) |
567 | printk(KERN_ERR "read() pos > actual, huh?\n" ); |
568 | |
569 | if (ubuf->pos == ubuf->actual_size) { |
570 | |
571 | /* finished with current buffer, take next buffer */ |
572 | |
573 | /* Requeue the buffer on the free list */ |
574 | ubuf->pos = 0; |
575 | |
576 | mutex_lock(&port->dmaqueue_lock); |
577 | list_move_tail(list: &ubuf->list, head: &port->list_buf_free.list); |
578 | mutex_unlock(lock: &port->dmaqueue_lock); |
579 | |
580 | /* Dequeue next */ |
581 | if ((file->f_flags & O_NONBLOCK) == 0) { |
582 | if (wait_event_interruptible(port->wait_read, |
583 | saa7164_vbi_next_buf(port))) { |
584 | break; |
585 | } |
586 | } |
587 | ubuf = saa7164_vbi_next_buf(port); |
588 | } |
589 | } |
590 | err: |
591 | if (!ret && !ubuf) { |
592 | printk(KERN_ERR "%s() EAGAIN\n" , __func__); |
593 | ret = -EAGAIN; |
594 | } |
595 | |
596 | return ret; |
597 | } |
598 | |
599 | static __poll_t fops_poll(struct file *file, poll_table *wait) |
600 | { |
601 | struct saa7164_vbi_fh *fh = (struct saa7164_vbi_fh *)file->private_data; |
602 | struct saa7164_port *port = fh->port; |
603 | __poll_t mask = 0; |
604 | |
605 | port->last_poll_msecs_diff = port->last_poll_msecs; |
606 | port->last_poll_msecs = jiffies_to_msecs(j: jiffies); |
607 | port->last_poll_msecs_diff = port->last_poll_msecs - |
608 | port->last_poll_msecs_diff; |
609 | |
610 | saa7164_histogram_update(hg: &port->poll_interval, |
611 | val: port->last_poll_msecs_diff); |
612 | |
613 | if (!video_is_registered(vdev: port->v4l_device)) |
614 | return EPOLLERR; |
615 | |
616 | if (atomic_cmpxchg(v: &fh->v4l_reading, old: 0, new: 1) == 0) { |
617 | if (atomic_inc_return(v: &port->v4l_reader_count) == 1) { |
618 | if (saa7164_vbi_initialize(port) < 0) |
619 | return EPOLLERR; |
620 | saa7164_vbi_start_streaming(port); |
621 | msleep(msecs: 200); |
622 | } |
623 | } |
624 | |
625 | /* blocking wait for buffer */ |
626 | if ((file->f_flags & O_NONBLOCK) == 0) { |
627 | if (wait_event_interruptible(port->wait_read, |
628 | saa7164_vbi_next_buf(port))) { |
629 | return EPOLLERR; |
630 | } |
631 | } |
632 | |
633 | /* Pull the first buffer from the used list */ |
634 | if (!list_empty(head: &port->list_buf_used.list)) |
635 | mask |= EPOLLIN | EPOLLRDNORM; |
636 | |
637 | return mask; |
638 | } |
639 | static const struct v4l2_file_operations vbi_fops = { |
640 | .owner = THIS_MODULE, |
641 | .open = fops_open, |
642 | .release = fops_release, |
643 | .read = fops_read, |
644 | .poll = fops_poll, |
645 | .unlocked_ioctl = video_ioctl2, |
646 | }; |
647 | |
648 | static const struct v4l2_ioctl_ops vbi_ioctl_ops = { |
649 | .vidioc_s_std = vidioc_s_std, |
650 | .vidioc_g_std = vidioc_g_std, |
651 | .vidioc_enum_input = saa7164_enum_input, |
652 | .vidioc_g_input = vidioc_g_input, |
653 | .vidioc_s_input = vidioc_s_input, |
654 | .vidioc_g_tuner = saa7164_g_tuner, |
655 | .vidioc_s_tuner = saa7164_s_tuner, |
656 | .vidioc_g_frequency = vidioc_g_frequency, |
657 | .vidioc_s_frequency = vidioc_s_frequency, |
658 | .vidioc_querycap = vidioc_querycap, |
659 | .vidioc_g_fmt_vbi_cap = saa7164_vbi_fmt, |
660 | .vidioc_try_fmt_vbi_cap = saa7164_vbi_fmt, |
661 | .vidioc_s_fmt_vbi_cap = saa7164_vbi_fmt, |
662 | }; |
663 | |
664 | static struct video_device saa7164_vbi_template = { |
665 | .name = "saa7164" , |
666 | .fops = &vbi_fops, |
667 | .ioctl_ops = &vbi_ioctl_ops, |
668 | .minor = -1, |
669 | .tvnorms = SAA7164_NORMS, |
670 | .device_caps = V4L2_CAP_VBI_CAPTURE | V4L2_CAP_READWRITE | |
671 | V4L2_CAP_TUNER, |
672 | }; |
673 | |
674 | static struct video_device *saa7164_vbi_alloc( |
675 | struct saa7164_port *port, |
676 | struct pci_dev *pci, |
677 | struct video_device *template, |
678 | char *type) |
679 | { |
680 | struct video_device *vfd; |
681 | struct saa7164_dev *dev = port->dev; |
682 | |
683 | dprintk(DBGLVL_VBI, "%s()\n" , __func__); |
684 | |
685 | vfd = video_device_alloc(); |
686 | if (NULL == vfd) |
687 | return NULL; |
688 | |
689 | *vfd = *template; |
690 | snprintf(buf: vfd->name, size: sizeof(vfd->name), fmt: "%s %s (%s)" , dev->name, |
691 | type, saa7164_boards[dev->board].name); |
692 | |
693 | vfd->v4l2_dev = &dev->v4l2_dev; |
694 | vfd->release = video_device_release; |
695 | return vfd; |
696 | } |
697 | |
698 | int saa7164_vbi_register(struct saa7164_port *port) |
699 | { |
700 | struct saa7164_dev *dev = port->dev; |
701 | int result = -ENODEV; |
702 | |
703 | dprintk(DBGLVL_VBI, "%s()\n" , __func__); |
704 | |
705 | BUG_ON(port->type != SAA7164_MPEG_VBI); |
706 | |
707 | /* Sanity check that the PCI configuration space is active */ |
708 | if (port->hwcfg.BARLocation == 0) { |
709 | printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n" , |
710 | __func__, result); |
711 | result = -ENOMEM; |
712 | goto failed; |
713 | } |
714 | |
715 | /* Establish VBI defaults here */ |
716 | |
717 | /* Allocate and register the video device node */ |
718 | port->v4l_device = saa7164_vbi_alloc(port, |
719 | pci: dev->pci, template: &saa7164_vbi_template, type: "vbi" ); |
720 | |
721 | if (!port->v4l_device) { |
722 | printk(KERN_INFO "%s: can't allocate vbi device\n" , |
723 | dev->name); |
724 | result = -ENOMEM; |
725 | goto failed; |
726 | } |
727 | |
728 | port->enc_port = &dev->ports[port->nr - 2]; |
729 | video_set_drvdata(vdev: port->v4l_device, data: port); |
730 | result = video_register_device(vdev: port->v4l_device, |
731 | type: VFL_TYPE_VBI, nr: -1); |
732 | if (result < 0) { |
733 | printk(KERN_INFO "%s: can't register vbi device\n" , |
734 | dev->name); |
735 | /* TODO: We're going to leak here if we don't dealloc |
736 | The buffers above. The unreg function can't deal wit it. |
737 | */ |
738 | goto failed; |
739 | } |
740 | |
741 | printk(KERN_INFO "%s: registered device vbi%d [vbi]\n" , |
742 | dev->name, port->v4l_device->num); |
743 | |
744 | /* Configure the hardware defaults */ |
745 | |
746 | result = 0; |
747 | failed: |
748 | return result; |
749 | } |
750 | |
751 | void saa7164_vbi_unregister(struct saa7164_port *port) |
752 | { |
753 | struct saa7164_dev *dev = port->dev; |
754 | |
755 | dprintk(DBGLVL_VBI, "%s(port=%d)\n" , __func__, port->nr); |
756 | |
757 | BUG_ON(port->type != SAA7164_MPEG_VBI); |
758 | |
759 | if (port->v4l_device) { |
760 | if (port->v4l_device->minor != -1) |
761 | video_unregister_device(vdev: port->v4l_device); |
762 | else |
763 | video_device_release(vdev: port->v4l_device); |
764 | |
765 | port->v4l_device = NULL; |
766 | } |
767 | |
768 | } |
769 | |