1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  cx18 ioctl system call
4  *
5  *  Derived from ivtv-ioctl.c
6  *
7  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
8  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
9  */
10 
11 #include "cx18-driver.h"
12 #include "cx18-io.h"
13 #include "cx18-version.h"
14 #include "cx18-mailbox.h"
15 #include "cx18-i2c.h"
16 #include "cx18-queue.h"
17 #include "cx18-fileops.h"
18 #include "cx18-vbi.h"
19 #include "cx18-audio.h"
20 #include "cx18-video.h"
21 #include "cx18-streams.h"
22 #include "cx18-ioctl.h"
23 #include "cx18-gpio.h"
24 #include "cx18-controls.h"
25 #include "cx18-cards.h"
26 #include "cx18-av-core.h"
27 #include <media/tveeprom.h>
28 #include <media/v4l2-event.h>
29 
30 u16 cx18_service2vbi(int type)
31 {
32 	switch (type) {
33 	case V4L2_SLICED_TELETEXT_B:
34 		return CX18_SLICED_TYPE_TELETEXT_B;
35 	case V4L2_SLICED_CAPTION_525:
36 		return CX18_SLICED_TYPE_CAPTION_525;
37 	case V4L2_SLICED_WSS_625:
38 		return CX18_SLICED_TYPE_WSS_625;
39 	case V4L2_SLICED_VPS:
40 		return CX18_SLICED_TYPE_VPS;
41 	default:
42 		return 0;
43 	}
44 }
45 
46 /* Check if VBI services are allowed on the (field, line) for the video std */
47 static int valid_service_line(int field, int line, int is_pal)
48 {
49 	return (is_pal && line >= 6 &&
50 		((field == 0 && line <= 23) || (field == 1 && line <= 22))) ||
51 	       (!is_pal && line >= 10 && line < 22);
52 }
53 
54 /*
55  * For a (field, line, std) and inbound potential set of services for that line,
56  * return the first valid service of those passed in the incoming set for that
57  * line in priority order:
58  * CC, VPS, or WSS over TELETEXT for well known lines
59  * TELETEXT, before VPS, before CC, before WSS, for other lines
60  */
61 static u16 select_service_from_set(int field, int line, u16 set, int is_pal)
62 {
63 	u16 valid_set = (is_pal ? V4L2_SLICED_VBI_625 : V4L2_SLICED_VBI_525);
64 	int i;
65 
66 	set = set & valid_set;
67 	if (set == 0 || !valid_service_line(field, line, is_pal))
68 		return 0;
69 	if (!is_pal) {
70 		if (line == 21 && (set & V4L2_SLICED_CAPTION_525))
71 			return V4L2_SLICED_CAPTION_525;
72 	} else {
73 		if (line == 16 && field == 0 && (set & V4L2_SLICED_VPS))
74 			return V4L2_SLICED_VPS;
75 		if (line == 23 && field == 0 && (set & V4L2_SLICED_WSS_625))
76 			return V4L2_SLICED_WSS_625;
77 		if (line == 23)
78 			return 0;
79 	}
80 	for (i = 0; i < 32; i++) {
81 		if (BIT(i) & set)
82 			return 1 << i;
83 	}
84 	return 0;
85 }
86 
87 /*
88  * Expand the service_set of *fmt into valid service_lines for the std,
89  * and clear the passed in fmt->service_set
90  */
91 void cx18_expand_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal)
92 {
93 	u16 set = fmt->service_set;
94 	int f, l;
95 
96 	fmt->service_set = 0;
97 	for (f = 0; f < 2; f++) {
98 		for (l = 0; l < 24; l++)
99 			fmt->service_lines[f][l] = select_service_from_set(f, l, set, is_pal);
100 	}
101 }
102 
103 /*
104  * Sanitize the service_lines in *fmt per the video std, and return 1
105  * if any service_line is left as valid after santization
106  */
107 static int check_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal)
108 {
109 	int f, l;
110 	u16 set = 0;
111 
112 	for (f = 0; f < 2; f++) {
113 		for (l = 0; l < 24; l++) {
114 			fmt->service_lines[f][l] = select_service_from_set(f, l, fmt->service_lines[f][l], is_pal);
115 			set |= fmt->service_lines[f][l];
116 		}
117 	}
118 	return set != 0;
119 }
120 
121 /* Compute the service_set from the assumed valid service_lines of *fmt */
122 u16 cx18_get_service_set(struct v4l2_sliced_vbi_format *fmt)
123 {
124 	int f, l;
125 	u16 set = 0;
126 
127 	for (f = 0; f < 2; f++) {
128 		for (l = 0; l < 24; l++)
129 			set |= fmt->service_lines[f][l];
130 	}
131 	return set;
132 }
133 
134 static int cx18_g_fmt_vid_cap(struct file *file, void *fh,
135 				struct v4l2_format *fmt)
136 {
137 	struct cx18_open_id *id = fh2id(fh);
138 	struct cx18 *cx = id->cx;
139 	struct cx18_stream *s = &cx->streams[id->type];
140 	struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
141 
142 	pixfmt->width = cx->cxhdl.width;
143 	pixfmt->height = cx->cxhdl.height;
144 	pixfmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
145 	pixfmt->field = V4L2_FIELD_INTERLACED;
146 	if (id->type == CX18_ENC_STREAM_TYPE_YUV) {
147 		pixfmt->pixelformat = s->pixelformat;
148 		pixfmt->sizeimage = s->vb_bytes_per_frame;
149 		pixfmt->bytesperline = s->vb_bytes_per_line;
150 	} else {
151 		pixfmt->pixelformat = V4L2_PIX_FMT_MPEG;
152 		pixfmt->sizeimage = 128 * 1024;
153 		pixfmt->bytesperline = 0;
154 	}
155 	return 0;
156 }
157 
158 static int cx18_g_fmt_vbi_cap(struct file *file, void *fh,
159 				struct v4l2_format *fmt)
160 {
161 	struct cx18 *cx = fh2id(fh)->cx;
162 	struct v4l2_vbi_format *vbifmt = &fmt->fmt.vbi;
163 
164 	vbifmt->sampling_rate = 27000000;
165 	vbifmt->offset = 248; /* FIXME - slightly wrong for both 50 & 60 Hz */
166 	vbifmt->samples_per_line = VBI_ACTIVE_SAMPLES - 4;
167 	vbifmt->sample_format = V4L2_PIX_FMT_GREY;
168 	vbifmt->start[0] = cx->vbi.start[0];
169 	vbifmt->start[1] = cx->vbi.start[1];
170 	vbifmt->count[0] = vbifmt->count[1] = cx->vbi.count;
171 	vbifmt->flags = 0;
172 	vbifmt->reserved[0] = 0;
173 	vbifmt->reserved[1] = 0;
174 	return 0;
175 }
176 
177 static int cx18_g_fmt_sliced_vbi_cap(struct file *file, void *fh,
178 					struct v4l2_format *fmt)
179 {
180 	struct cx18 *cx = fh2id(fh)->cx;
181 	struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;
182 
183 	/* sane, V4L2 spec compliant, defaults */
184 	vbifmt->reserved[0] = 0;
185 	vbifmt->reserved[1] = 0;
186 	vbifmt->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
187 	memset(vbifmt->service_lines, 0, sizeof(vbifmt->service_lines));
188 	vbifmt->service_set = 0;
189 
190 	/*
191 	 * Fetch the configured service_lines and total service_set from the
192 	 * digitizer/slicer.  Note, cx18_av_vbi() wipes the passed in
193 	 * fmt->fmt.sliced under valid calling conditions
194 	 */
195 	if (v4l2_subdev_call(cx->sd_av, vbi, g_sliced_fmt, &fmt->fmt.sliced))
196 		return -EINVAL;
197 
198 	vbifmt->service_set = cx18_get_service_set(vbifmt);
199 	return 0;
200 }
201 
202 static int cx18_try_fmt_vid_cap(struct file *file, void *fh,
203 				struct v4l2_format *fmt)
204 {
205 	struct cx18_open_id *id = fh2id(fh);
206 	struct cx18 *cx = id->cx;
207 	int w = fmt->fmt.pix.width;
208 	int h = fmt->fmt.pix.height;
209 	int min_h = 2;
210 
211 	w = min(w, 720);
212 	w = max(w, 2);
213 	if (id->type == CX18_ENC_STREAM_TYPE_YUV) {
214 		/* YUV height must be a multiple of 32 */
215 		h &= ~0x1f;
216 		min_h = 32;
217 	}
218 	h = min(h, cx->is_50hz ? 576 : 480);
219 	h = max(h, min_h);
220 
221 	fmt->fmt.pix.width = w;
222 	fmt->fmt.pix.height = h;
223 	return 0;
224 }
225 
226 static int cx18_try_fmt_vbi_cap(struct file *file, void *fh,
227 				struct v4l2_format *fmt)
228 {
229 	return cx18_g_fmt_vbi_cap(file, fh, fmt);
230 }
231 
232 static int cx18_try_fmt_sliced_vbi_cap(struct file *file, void *fh,
233 					struct v4l2_format *fmt)
234 {
235 	struct cx18 *cx = fh2id(fh)->cx;
236 	struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;
237 
238 	vbifmt->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
239 	vbifmt->reserved[0] = 0;
240 	vbifmt->reserved[1] = 0;
241 
242 	/* If given a service set, expand it validly & clear passed in set */
243 	if (vbifmt->service_set)
244 		cx18_expand_service_set(vbifmt, cx->is_50hz);
245 	/* Sanitize the service_lines, and compute the new set if any valid */
246 	if (check_service_set(vbifmt, cx->is_50hz))
247 		vbifmt->service_set = cx18_get_service_set(vbifmt);
248 	return 0;
249 }
250 
251 static int cx18_s_fmt_vid_cap(struct file *file, void *fh,
252 				struct v4l2_format *fmt)
253 {
254 	struct cx18_open_id *id = fh2id(fh);
255 	struct cx18 *cx = id->cx;
256 	struct v4l2_subdev_format format = {
257 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
258 	};
259 	struct cx18_stream *s = &cx->streams[id->type];
260 	int ret;
261 	int w, h;
262 
263 	ret = cx18_try_fmt_vid_cap(file, fh, fmt);
264 	if (ret)
265 		return ret;
266 	w = fmt->fmt.pix.width;
267 	h = fmt->fmt.pix.height;
268 
269 	if (cx->cxhdl.width == w && cx->cxhdl.height == h &&
270 	    s->pixelformat == fmt->fmt.pix.pixelformat)
271 		return 0;
272 
273 	if (atomic_read(&cx->ana_capturing) > 0)
274 		return -EBUSY;
275 
276 	s->pixelformat = fmt->fmt.pix.pixelformat;
277 	/* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
278 	   UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
279 	if (s->pixelformat == V4L2_PIX_FMT_HM12) {
280 		s->vb_bytes_per_frame = h * 720 * 3 / 2;
281 		s->vb_bytes_per_line = 720; /* First plane */
282 	} else {
283 		s->vb_bytes_per_frame = h * 720 * 2;
284 		s->vb_bytes_per_line = 1440; /* Packed */
285 	}
286 
287 	format.format.width = cx->cxhdl.width = w;
288 	format.format.height = cx->cxhdl.height = h;
289 	format.format.code = MEDIA_BUS_FMT_FIXED;
290 	v4l2_subdev_call(cx->sd_av, pad, set_fmt, NULL, &format);
291 	return cx18_g_fmt_vid_cap(file, fh, fmt);
292 }
293 
294 static int cx18_s_fmt_vbi_cap(struct file *file, void *fh,
295 				struct v4l2_format *fmt)
296 {
297 	struct cx18_open_id *id = fh2id(fh);
298 	struct cx18 *cx = id->cx;
299 	int ret;
300 
301 	/*
302 	 * Changing the Encoder's Raw VBI parameters won't have any effect
303 	 * if any analog capture is ongoing
304 	 */
305 	if (!cx18_raw_vbi(cx) && atomic_read(&cx->ana_capturing) > 0)
306 		return -EBUSY;
307 
308 	/*
309 	 * Set the digitizer registers for raw active VBI.
310 	 * Note cx18_av_vbi_wipes out a lot of the passed in fmt under valid
311 	 * calling conditions
312 	 */
313 	ret = v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &fmt->fmt.vbi);
314 	if (ret)
315 		return ret;
316 
317 	/* Store our new v4l2 (non-)sliced VBI state */
318 	cx->vbi.sliced_in->service_set = 0;
319 	cx->vbi.in.type = V4L2_BUF_TYPE_VBI_CAPTURE;
320 
321 	return cx18_g_fmt_vbi_cap(file, fh, fmt);
322 }
323 
324 static int cx18_s_fmt_sliced_vbi_cap(struct file *file, void *fh,
325 					struct v4l2_format *fmt)
326 {
327 	struct cx18_open_id *id = fh2id(fh);
328 	struct cx18 *cx = id->cx;
329 	int ret;
330 	struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;
331 
332 	cx18_try_fmt_sliced_vbi_cap(file, fh, fmt);
333 
334 	/*
335 	 * Changing the Encoder's Raw VBI parameters won't have any effect
336 	 * if any analog capture is ongoing
337 	 */
338 	if (cx18_raw_vbi(cx) && atomic_read(&cx->ana_capturing) > 0)
339 		return -EBUSY;
340 
341 	/*
342 	 * Set the service_lines requested in the digitizer/slicer registers.
343 	 * Note, cx18_av_vbi() wipes some "impossible" service lines in the
344 	 * passed in fmt->fmt.sliced under valid calling conditions
345 	 */
346 	ret = v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &fmt->fmt.sliced);
347 	if (ret)
348 		return ret;
349 	/* Store our current v4l2 sliced VBI settings */
350 	cx->vbi.in.type =  V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
351 	memcpy(cx->vbi.sliced_in, vbifmt, sizeof(*cx->vbi.sliced_in));
352 	return 0;
353 }
354 
355 #ifdef CONFIG_VIDEO_ADV_DEBUG
356 static int cx18_g_register(struct file *file, void *fh,
357 				struct v4l2_dbg_register *reg)
358 {
359 	struct cx18 *cx = fh2id(fh)->cx;
360 
361 	if (reg->reg & 0x3)
362 		return -EINVAL;
363 	if (reg->reg >= CX18_MEM_OFFSET + CX18_MEM_SIZE)
364 		return -EINVAL;
365 	reg->size = 4;
366 	reg->val = cx18_read_enc(cx, reg->reg);
367 	return 0;
368 }
369 
370 static int cx18_s_register(struct file *file, void *fh,
371 				const struct v4l2_dbg_register *reg)
372 {
373 	struct cx18 *cx = fh2id(fh)->cx;
374 
375 	if (reg->reg & 0x3)
376 		return -EINVAL;
377 	if (reg->reg >= CX18_MEM_OFFSET + CX18_MEM_SIZE)
378 		return -EINVAL;
379 	cx18_write_enc(cx, reg->val, reg->reg);
380 	return 0;
381 }
382 #endif
383 
384 static int cx18_querycap(struct file *file, void *fh,
385 				struct v4l2_capability *vcap)
386 {
387 	struct cx18_open_id *id = fh2id(fh);
388 	struct cx18 *cx = id->cx;
389 
390 	strscpy(vcap->driver, CX18_DRIVER_NAME, sizeof(vcap->driver));
391 	strscpy(vcap->card, cx->card_name, sizeof(vcap->card));
392 	snprintf(vcap->bus_info, sizeof(vcap->bus_info),
393 		 "PCI:%s", pci_name(cx->pci_dev));
394 	vcap->capabilities = cx->v4l2_cap | V4L2_CAP_DEVICE_CAPS;
395 	return 0;
396 }
397 
398 static int cx18_enumaudio(struct file *file, void *fh, struct v4l2_audio *vin)
399 {
400 	struct cx18 *cx = fh2id(fh)->cx;
401 
402 	return cx18_get_audio_input(cx, vin->index, vin);
403 }
404 
405 static int cx18_g_audio(struct file *file, void *fh, struct v4l2_audio *vin)
406 {
407 	struct cx18 *cx = fh2id(fh)->cx;
408 
409 	vin->index = cx->audio_input;
410 	return cx18_get_audio_input(cx, vin->index, vin);
411 }
412 
413 static int cx18_s_audio(struct file *file, void *fh, const struct v4l2_audio *vout)
414 {
415 	struct cx18 *cx = fh2id(fh)->cx;
416 
417 	if (vout->index >= cx->nof_audio_inputs)
418 		return -EINVAL;
419 	cx->audio_input = vout->index;
420 	cx18_audio_set_io(cx);
421 	return 0;
422 }
423 
424 static int cx18_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
425 {
426 	struct cx18 *cx = fh2id(fh)->cx;
427 
428 	/* set it to defaults from our table */
429 	return cx18_get_input(cx, vin->index, vin);
430 }
431 
432 static int cx18_g_pixelaspect(struct file *file, void *fh,
433 			      int type, struct v4l2_fract *f)
434 {
435 	struct cx18 *cx = fh2id(fh)->cx;
436 
437 	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
438 		return -EINVAL;
439 
440 	f->numerator = cx->is_50hz ? 54 : 11;
441 	f->denominator = cx->is_50hz ? 59 : 10;
442 	return 0;
443 }
444 
445 static int cx18_g_selection(struct file *file, void *fh,
446 			    struct v4l2_selection *sel)
447 {
448 	struct cx18 *cx = fh2id(fh)->cx;
449 
450 	if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
451 		return -EINVAL;
452 	switch (sel->target) {
453 	case V4L2_SEL_TGT_CROP_BOUNDS:
454 	case V4L2_SEL_TGT_CROP_DEFAULT:
455 		sel->r.top = sel->r.left = 0;
456 		sel->r.width = 720;
457 		sel->r.height = cx->is_50hz ? 576 : 480;
458 		break;
459 	default:
460 		return -EINVAL;
461 	}
462 	return 0;
463 }
464 
465 static int cx18_enum_fmt_vid_cap(struct file *file, void *fh,
466 					struct v4l2_fmtdesc *fmt)
467 {
468 	static const struct v4l2_fmtdesc formats[] = {
469 		{ 0, V4L2_BUF_TYPE_VIDEO_CAPTURE, 0,
470 		  "HM12 (YUV 4:1:1)", V4L2_PIX_FMT_HM12, { 0, 0, 0, 0 }
471 		},
472 		{ 1, V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FMT_FLAG_COMPRESSED,
473 		  "MPEG", V4L2_PIX_FMT_MPEG, { 0, 0, 0, 0 }
474 		},
475 		{ 2, V4L2_BUF_TYPE_VIDEO_CAPTURE, 0,
476 		  "UYVY 4:2:2", V4L2_PIX_FMT_UYVY, { 0, 0, 0, 0 }
477 		},
478 	};
479 
480 	if (fmt->index > ARRAY_SIZE(formats) - 1)
481 		return -EINVAL;
482 	*fmt = formats[fmt->index];
483 	return 0;
484 }
485 
486 static int cx18_g_input(struct file *file, void *fh, unsigned int *i)
487 {
488 	struct cx18 *cx = fh2id(fh)->cx;
489 
490 	*i = cx->active_input;
491 	return 0;
492 }
493 
494 int cx18_s_input(struct file *file, void *fh, unsigned int inp)
495 {
496 	struct cx18_open_id *id = fh2id(fh);
497 	struct cx18 *cx = id->cx;
498 	v4l2_std_id std = V4L2_STD_ALL;
499 	const struct cx18_card_video_input *card_input =
500 				cx->card->video_inputs + inp;
501 
502 	if (inp >= cx->nof_inputs)
503 		return -EINVAL;
504 
505 	if (inp == cx->active_input) {
506 		CX18_DEBUG_INFO("Input unchanged\n");
507 		return 0;
508 	}
509 
510 	CX18_DEBUG_INFO("Changing input from %d to %d\n",
511 			cx->active_input, inp);
512 
513 	cx->active_input = inp;
514 	/* Set the audio input to whatever is appropriate for the input type. */
515 	cx->audio_input = cx->card->video_inputs[inp].audio_index;
516 	if (card_input->video_type == V4L2_INPUT_TYPE_TUNER)
517 		std = cx->tuner_std;
518 	cx->streams[CX18_ENC_STREAM_TYPE_MPG].video_dev.tvnorms = std;
519 	cx->streams[CX18_ENC_STREAM_TYPE_YUV].video_dev.tvnorms = std;
520 	cx->streams[CX18_ENC_STREAM_TYPE_VBI].video_dev.tvnorms = std;
521 
522 	/* prevent others from messing with the streams until
523 	   we're finished changing inputs. */
524 	cx18_mute(cx);
525 	cx18_video_set_io(cx);
526 	cx18_audio_set_io(cx);
527 	cx18_unmute(cx);
528 	return 0;
529 }
530 
531 static int cx18_g_frequency(struct file *file, void *fh,
532 				struct v4l2_frequency *vf)
533 {
534 	struct cx18 *cx = fh2id(fh)->cx;
535 
536 	if (vf->tuner != 0)
537 		return -EINVAL;
538 
539 	cx18_call_all(cx, tuner, g_frequency, vf);
540 	return 0;
541 }
542 
543 int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
544 {
545 	struct cx18_open_id *id = fh2id(fh);
546 	struct cx18 *cx = id->cx;
547 
548 	if (vf->tuner != 0)
549 		return -EINVAL;
550 
551 	cx18_mute(cx);
552 	CX18_DEBUG_INFO("v4l2 ioctl: set frequency %d\n", vf->frequency);
553 	cx18_call_all(cx, tuner, s_frequency, vf);
554 	cx18_unmute(cx);
555 	return 0;
556 }
557 
558 static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
559 {
560 	struct cx18 *cx = fh2id(fh)->cx;
561 
562 	*std = cx->std;
563 	return 0;
564 }
565 
566 int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
567 {
568 	struct cx18_open_id *id = fh2id(fh);
569 	struct cx18 *cx = id->cx;
570 
571 	if ((std & V4L2_STD_ALL) == 0)
572 		return -EINVAL;
573 
574 	if (std == cx->std)
575 		return 0;
576 
577 	if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags) ||
578 	    atomic_read(&cx->ana_capturing) > 0) {
579 		/* Switching standard would turn off the radio or mess
580 		   with already running streams, prevent that by
581 		   returning EBUSY. */
582 		return -EBUSY;
583 	}
584 
585 	cx->std = std;
586 	cx->is_60hz = (std & V4L2_STD_525_60) ? 1 : 0;
587 	cx->is_50hz = !cx->is_60hz;
588 	cx2341x_handler_set_50hz(&cx->cxhdl, cx->is_50hz);
589 	cx->cxhdl.width = 720;
590 	cx->cxhdl.height = cx->is_50hz ? 576 : 480;
591 	cx->vbi.count = cx->is_50hz ? 18 : 12;
592 	cx->vbi.start[0] = cx->is_50hz ? 6 : 10;
593 	cx->vbi.start[1] = cx->is_50hz ? 318 : 273;
594 	CX18_DEBUG_INFO("Switching standard to %llx.\n",
595 			(unsigned long long) cx->std);
596 
597 	/* Tuner */
598 	cx18_call_all(cx, video, s_std, cx->std);
599 	return 0;
600 }
601 
602 static int cx18_s_tuner(struct file *file, void *fh, const struct v4l2_tuner *vt)
603 {
604 	struct cx18_open_id *id = fh2id(fh);
605 	struct cx18 *cx = id->cx;
606 
607 	if (vt->index != 0)
608 		return -EINVAL;
609 
610 	cx18_call_all(cx, tuner, s_tuner, vt);
611 	return 0;
612 }
613 
614 static int cx18_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
615 {
616 	struct cx18 *cx = fh2id(fh)->cx;
617 
618 	if (vt->index != 0)
619 		return -EINVAL;
620 
621 	cx18_call_all(cx, tuner, g_tuner, vt);
622 
623 	if (vt->type == V4L2_TUNER_RADIO)
624 		strscpy(vt->name, "cx18 Radio Tuner", sizeof(vt->name));
625 	else
626 		strscpy(vt->name, "cx18 TV Tuner", sizeof(vt->name));
627 	return 0;
628 }
629 
630 static int cx18_g_sliced_vbi_cap(struct file *file, void *fh,
631 					struct v4l2_sliced_vbi_cap *cap)
632 {
633 	struct cx18 *cx = fh2id(fh)->cx;
634 	int set = cx->is_50hz ? V4L2_SLICED_VBI_625 : V4L2_SLICED_VBI_525;
635 	int f, l;
636 
637 	if (cap->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
638 		return -EINVAL;
639 
640 	cap->service_set = 0;
641 	for (f = 0; f < 2; f++) {
642 		for (l = 0; l < 24; l++) {
643 			if (valid_service_line(f, l, cx->is_50hz)) {
644 				/*
645 				 * We can find all v4l2 supported vbi services
646 				 * for the standard, on a valid line for the std
647 				 */
648 				cap->service_lines[f][l] = set;
649 				cap->service_set |= set;
650 			} else
651 				cap->service_lines[f][l] = 0;
652 		}
653 	}
654 	for (f = 0; f < 3; f++)
655 		cap->reserved[f] = 0;
656 	return 0;
657 }
658 
659 static int _cx18_process_idx_data(struct cx18_buffer *buf,
660 				  struct v4l2_enc_idx *idx)
661 {
662 	int consumed, remaining;
663 	struct v4l2_enc_idx_entry *e_idx;
664 	struct cx18_enc_idx_entry *e_buf;
665 
666 	/* Frame type lookup: 1=I, 2=P, 4=B */
667 	const int mapping[8] = {
668 		-1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P,
669 		-1, V4L2_ENC_IDX_FRAME_B, -1, -1, -1
670 	};
671 
672 	/*
673 	 * Assumption here is that a buf holds an integral number of
674 	 * struct cx18_enc_idx_entry objects and is properly aligned.
675 	 * This is enforced by the module options on IDX buffer sizes.
676 	 */
677 	remaining = buf->bytesused - buf->readpos;
678 	consumed = 0;
679 	e_idx = &idx->entry[idx->entries];
680 	e_buf = (struct cx18_enc_idx_entry *) &buf->buf[buf->readpos];
681 
682 	while (remaining >= sizeof(struct cx18_enc_idx_entry) &&
683 	       idx->entries < V4L2_ENC_IDX_ENTRIES) {
684 
685 		e_idx->offset = (((u64) le32_to_cpu(e_buf->offset_high)) << 32)
686 				| le32_to_cpu(e_buf->offset_low);
687 
688 		e_idx->pts = (((u64) (le32_to_cpu(e_buf->pts_high) & 1)) << 32)
689 			     | le32_to_cpu(e_buf->pts_low);
690 
691 		e_idx->length = le32_to_cpu(e_buf->length);
692 
693 		e_idx->flags = mapping[le32_to_cpu(e_buf->flags) & 0x7];
694 
695 		e_idx->reserved[0] = 0;
696 		e_idx->reserved[1] = 0;
697 
698 		idx->entries++;
699 		e_idx = &idx->entry[idx->entries];
700 		e_buf++;
701 
702 		remaining -= sizeof(struct cx18_enc_idx_entry);
703 		consumed += sizeof(struct cx18_enc_idx_entry);
704 	}
705 
706 	/* Swallow any partial entries at the end, if there are any */
707 	if (remaining > 0 && remaining < sizeof(struct cx18_enc_idx_entry))
708 		consumed += remaining;
709 
710 	buf->readpos += consumed;
711 	return consumed;
712 }
713 
714 static int cx18_process_idx_data(struct cx18_stream *s, struct cx18_mdl *mdl,
715 				 struct v4l2_enc_idx *idx)
716 {
717 	if (s->type != CX18_ENC_STREAM_TYPE_IDX)
718 		return -EINVAL;
719 
720 	if (mdl->curr_buf == NULL)
721 		mdl->curr_buf = list_first_entry(&mdl->buf_list,
722 						 struct cx18_buffer, list);
723 
724 	if (list_entry_is_past_end(mdl->curr_buf, &mdl->buf_list, list)) {
725 		/*
726 		 * For some reason we've exhausted the buffers, but the MDL
727 		 * object still said some data was unread.
728 		 * Fix that and bail out.
729 		 */
730 		mdl->readpos = mdl->bytesused;
731 		return 0;
732 	}
733 
734 	list_for_each_entry_from(mdl->curr_buf, &mdl->buf_list, list) {
735 
736 		/* Skip any empty buffers in the MDL */
737 		if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused)
738 			continue;
739 
740 		mdl->readpos += _cx18_process_idx_data(mdl->curr_buf, idx);
741 
742 		/* exit when MDL drained or request satisfied */
743 		if (idx->entries >= V4L2_ENC_IDX_ENTRIES ||
744 		    mdl->curr_buf->readpos < mdl->curr_buf->bytesused ||
745 		    mdl->readpos >= mdl->bytesused)
746 			break;
747 	}
748 	return 0;
749 }
750 
751 static int cx18_g_enc_index(struct file *file, void *fh,
752 				struct v4l2_enc_idx *idx)
753 {
754 	struct cx18 *cx = fh2id(fh)->cx;
755 	struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
756 	s32 tmp;
757 	struct cx18_mdl *mdl;
758 
759 	if (!cx18_stream_enabled(s)) /* Module options inhibited IDX stream */
760 		return -EINVAL;
761 
762 	/* Compute the best case number of entries we can buffer */
763 	tmp = s->buffers -
764 			  s->bufs_per_mdl * CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN;
765 	if (tmp <= 0)
766 		tmp = 1;
767 	tmp = tmp * s->buf_size / sizeof(struct cx18_enc_idx_entry);
768 
769 	/* Fill out the header of the return structure */
770 	idx->entries = 0;
771 	idx->entries_cap = tmp;
772 	memset(idx->reserved, 0, sizeof(idx->reserved));
773 
774 	/* Pull IDX MDLs and buffers from q_full and populate the entries */
775 	do {
776 		mdl = cx18_dequeue(s, &s->q_full);
777 		if (mdl == NULL) /* No more IDX data right now */
778 			break;
779 
780 		/* Extract the Index entry data from the MDL and buffers */
781 		cx18_process_idx_data(s, mdl, idx);
782 		if (mdl->readpos < mdl->bytesused) {
783 			/* We finished with data remaining, push the MDL back */
784 			cx18_push(s, mdl, &s->q_full);
785 			break;
786 		}
787 
788 		/* We drained this MDL, schedule it to go to the firmware */
789 		cx18_enqueue(s, mdl, &s->q_free);
790 
791 	} while (idx->entries < V4L2_ENC_IDX_ENTRIES);
792 
793 	/* Tell the work handler to send free IDX MDLs to the firmware */
794 	cx18_stream_load_fw_queue(s);
795 	return 0;
796 }
797 
798 static struct videobuf_queue *cx18_vb_queue(struct cx18_open_id *id)
799 {
800 	struct videobuf_queue *q = NULL;
801 	struct cx18 *cx = id->cx;
802 	struct cx18_stream *s = &cx->streams[id->type];
803 
804 	switch (s->vb_type) {
805 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
806 		q = &s->vbuf_q;
807 		break;
808 	case V4L2_BUF_TYPE_VBI_CAPTURE:
809 		break;
810 	default:
811 		break;
812 	}
813 	return q;
814 }
815 
816 static int cx18_streamon(struct file *file, void *priv,
817 	enum v4l2_buf_type type)
818 {
819 	struct cx18_open_id *id = file->private_data;
820 	struct cx18 *cx = id->cx;
821 	struct cx18_stream *s = &cx->streams[id->type];
822 
823 	/* Start the hardware only if we're the video device */
824 	if ((s->vb_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
825 		(s->vb_type != V4L2_BUF_TYPE_VBI_CAPTURE))
826 		return -EINVAL;
827 
828 	if (id->type != CX18_ENC_STREAM_TYPE_YUV)
829 		return -EINVAL;
830 
831 	/* Establish a buffer timeout */
832 	mod_timer(&s->vb_timeout, msecs_to_jiffies(2000) + jiffies);
833 
834 	return videobuf_streamon(cx18_vb_queue(id));
835 }
836 
837 static int cx18_streamoff(struct file *file, void *priv,
838 	enum v4l2_buf_type type)
839 {
840 	struct cx18_open_id *id = file->private_data;
841 	struct cx18 *cx = id->cx;
842 	struct cx18_stream *s = &cx->streams[id->type];
843 
844 	/* Start the hardware only if we're the video device */
845 	if ((s->vb_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
846 		(s->vb_type != V4L2_BUF_TYPE_VBI_CAPTURE))
847 		return -EINVAL;
848 
849 	if (id->type != CX18_ENC_STREAM_TYPE_YUV)
850 		return -EINVAL;
851 
852 	return videobuf_streamoff(cx18_vb_queue(id));
853 }
854 
855 static int cx18_reqbufs(struct file *file, void *priv,
856 	struct v4l2_requestbuffers *rb)
857 {
858 	struct cx18_open_id *id = file->private_data;
859 	struct cx18 *cx = id->cx;
860 	struct cx18_stream *s = &cx->streams[id->type];
861 
862 	if ((s->vb_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
863 		(s->vb_type != V4L2_BUF_TYPE_VBI_CAPTURE))
864 		return -EINVAL;
865 
866 	return videobuf_reqbufs(cx18_vb_queue(id), rb);
867 }
868 
869 static int cx18_querybuf(struct file *file, void *priv,
870 	struct v4l2_buffer *b)
871 {
872 	struct cx18_open_id *id = file->private_data;
873 	struct cx18 *cx = id->cx;
874 	struct cx18_stream *s = &cx->streams[id->type];
875 
876 	if ((s->vb_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
877 		(s->vb_type != V4L2_BUF_TYPE_VBI_CAPTURE))
878 		return -EINVAL;
879 
880 	return videobuf_querybuf(cx18_vb_queue(id), b);
881 }
882 
883 static int cx18_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
884 {
885 	struct cx18_open_id *id = file->private_data;
886 	struct cx18 *cx = id->cx;
887 	struct cx18_stream *s = &cx->streams[id->type];
888 
889 	if ((s->vb_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
890 		(s->vb_type != V4L2_BUF_TYPE_VBI_CAPTURE))
891 		return -EINVAL;
892 
893 	return videobuf_qbuf(cx18_vb_queue(id), b);
894 }
895 
896 static int cx18_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
897 {
898 	struct cx18_open_id *id = file->private_data;
899 	struct cx18 *cx = id->cx;
900 	struct cx18_stream *s = &cx->streams[id->type];
901 
902 	if ((s->vb_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
903 		(s->vb_type != V4L2_BUF_TYPE_VBI_CAPTURE))
904 		return -EINVAL;
905 
906 	return videobuf_dqbuf(cx18_vb_queue(id), b, file->f_flags & O_NONBLOCK);
907 }
908 
909 static int cx18_encoder_cmd(struct file *file, void *fh,
910 				struct v4l2_encoder_cmd *enc)
911 {
912 	struct cx18_open_id *id = fh2id(fh);
913 	struct cx18 *cx = id->cx;
914 	u32 h;
915 
916 	switch (enc->cmd) {
917 	case V4L2_ENC_CMD_START:
918 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_START\n");
919 		enc->flags = 0;
920 		return cx18_start_capture(id);
921 
922 	case V4L2_ENC_CMD_STOP:
923 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_STOP\n");
924 		enc->flags &= V4L2_ENC_CMD_STOP_AT_GOP_END;
925 		cx18_stop_capture(id,
926 				  enc->flags & V4L2_ENC_CMD_STOP_AT_GOP_END);
927 		break;
928 
929 	case V4L2_ENC_CMD_PAUSE:
930 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_PAUSE\n");
931 		enc->flags = 0;
932 		if (!atomic_read(&cx->ana_capturing))
933 			return -EPERM;
934 		if (test_and_set_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags))
935 			return 0;
936 		h = cx18_find_handle(cx);
937 		if (h == CX18_INVALID_TASK_HANDLE) {
938 			CX18_ERR("Can't find valid task handle for V4L2_ENC_CMD_PAUSE\n");
939 			return -EBADFD;
940 		}
941 		cx18_mute(cx);
942 		cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, h);
943 		break;
944 
945 	case V4L2_ENC_CMD_RESUME:
946 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_RESUME\n");
947 		enc->flags = 0;
948 		if (!atomic_read(&cx->ana_capturing))
949 			return -EPERM;
950 		if (!test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags))
951 			return 0;
952 		h = cx18_find_handle(cx);
953 		if (h == CX18_INVALID_TASK_HANDLE) {
954 			CX18_ERR("Can't find valid task handle for V4L2_ENC_CMD_RESUME\n");
955 			return -EBADFD;
956 		}
957 		cx18_vapi(cx, CX18_CPU_CAPTURE_RESUME, 1, h);
958 		cx18_unmute(cx);
959 		break;
960 
961 	default:
962 		CX18_DEBUG_IOCTL("Unknown cmd %d\n", enc->cmd);
963 		return -EINVAL;
964 	}
965 	return 0;
966 }
967 
968 static int cx18_try_encoder_cmd(struct file *file, void *fh,
969 				struct v4l2_encoder_cmd *enc)
970 {
971 	struct cx18 *cx = fh2id(fh)->cx;
972 
973 	switch (enc->cmd) {
974 	case V4L2_ENC_CMD_START:
975 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_START\n");
976 		enc->flags = 0;
977 		break;
978 
979 	case V4L2_ENC_CMD_STOP:
980 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_STOP\n");
981 		enc->flags &= V4L2_ENC_CMD_STOP_AT_GOP_END;
982 		break;
983 
984 	case V4L2_ENC_CMD_PAUSE:
985 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_PAUSE\n");
986 		enc->flags = 0;
987 		break;
988 
989 	case V4L2_ENC_CMD_RESUME:
990 		CX18_DEBUG_IOCTL("V4L2_ENC_CMD_RESUME\n");
991 		enc->flags = 0;
992 		break;
993 
994 	default:
995 		CX18_DEBUG_IOCTL("Unknown cmd %d\n", enc->cmd);
996 		return -EINVAL;
997 	}
998 	return 0;
999 }
1000 
1001 static int cx18_log_status(struct file *file, void *fh)
1002 {
1003 	struct cx18 *cx = fh2id(fh)->cx;
1004 	struct v4l2_input vidin;
1005 	struct v4l2_audio audin;
1006 	int i;
1007 
1008 	CX18_INFO("Version: %s  Card: %s\n", CX18_VERSION, cx->card_name);
1009 	if (cx->hw_flags & CX18_HW_TVEEPROM) {
1010 		struct tveeprom tv;
1011 
1012 		cx18_read_eeprom(cx, &tv);
1013 	}
1014 	cx18_call_all(cx, core, log_status);
1015 	cx18_get_input(cx, cx->active_input, &vidin);
1016 	cx18_get_audio_input(cx, cx->audio_input, &audin);
1017 	CX18_INFO("Video Input: %s\n", vidin.name);
1018 	CX18_INFO("Audio Input: %s\n", audin.name);
1019 	mutex_lock(&cx->gpio_lock);
1020 	CX18_INFO("GPIO:  direction 0x%08x, value 0x%08x\n",
1021 		cx->gpio_dir, cx->gpio_val);
1022 	mutex_unlock(&cx->gpio_lock);
1023 	CX18_INFO("Tuner: %s\n",
1024 		test_bit(CX18_F_I_RADIO_USER, &cx->i_flags) ?  "Radio" : "TV");
1025 	v4l2_ctrl_handler_log_status(&cx->cxhdl.hdl, cx->v4l2_dev.name);
1026 	CX18_INFO("Status flags: 0x%08lx\n", cx->i_flags);
1027 	for (i = 0; i < CX18_MAX_STREAMS; i++) {
1028 		struct cx18_stream *s = &cx->streams[i];
1029 
1030 		if (s->video_dev.v4l2_dev == NULL || s->buffers == 0)
1031 			continue;
1032 		CX18_INFO("Stream %s: status 0x%04lx, %d%% of %d KiB (%d buffers) in use\n",
1033 			  s->name, s->s_flags,
1034 			  atomic_read(&s->q_full.depth) * s->bufs_per_mdl * 100
1035 			   / s->buffers,
1036 			  (s->buffers * s->buf_size) / 1024, s->buffers);
1037 	}
1038 	CX18_INFO("Read MPEG/VBI: %lld/%lld bytes\n",
1039 			(long long)cx->mpg_data_received,
1040 			(long long)cx->vbi_data_inserted);
1041 	return 0;
1042 }
1043 
1044 static long cx18_default(struct file *file, void *fh, bool valid_prio,
1045 			 unsigned int cmd, void *arg)
1046 {
1047 	struct cx18 *cx = fh2id(fh)->cx;
1048 
1049 	switch (cmd) {
1050 	case VIDIOC_INT_RESET: {
1051 		u32 val = *(u32 *)arg;
1052 
1053 		if ((val == 0) || (val & 0x01))
1054 			cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, core, reset,
1055 				     (u32) CX18_GPIO_RESET_Z8F0811);
1056 		break;
1057 	}
1058 
1059 	default:
1060 		return -ENOTTY;
1061 	}
1062 	return 0;
1063 }
1064 
1065 static const struct v4l2_ioctl_ops cx18_ioctl_ops = {
1066 	.vidioc_querycap                = cx18_querycap,
1067 	.vidioc_s_audio                 = cx18_s_audio,
1068 	.vidioc_g_audio                 = cx18_g_audio,
1069 	.vidioc_enumaudio               = cx18_enumaudio,
1070 	.vidioc_enum_input              = cx18_enum_input,
1071 	.vidioc_g_pixelaspect           = cx18_g_pixelaspect,
1072 	.vidioc_g_selection             = cx18_g_selection,
1073 	.vidioc_g_input                 = cx18_g_input,
1074 	.vidioc_s_input                 = cx18_s_input,
1075 	.vidioc_g_frequency             = cx18_g_frequency,
1076 	.vidioc_s_frequency             = cx18_s_frequency,
1077 	.vidioc_s_tuner                 = cx18_s_tuner,
1078 	.vidioc_g_tuner                 = cx18_g_tuner,
1079 	.vidioc_g_enc_index             = cx18_g_enc_index,
1080 	.vidioc_g_std                   = cx18_g_std,
1081 	.vidioc_s_std                   = cx18_s_std,
1082 	.vidioc_log_status              = cx18_log_status,
1083 	.vidioc_enum_fmt_vid_cap        = cx18_enum_fmt_vid_cap,
1084 	.vidioc_encoder_cmd             = cx18_encoder_cmd,
1085 	.vidioc_try_encoder_cmd         = cx18_try_encoder_cmd,
1086 	.vidioc_g_fmt_vid_cap           = cx18_g_fmt_vid_cap,
1087 	.vidioc_g_fmt_vbi_cap           = cx18_g_fmt_vbi_cap,
1088 	.vidioc_g_fmt_sliced_vbi_cap    = cx18_g_fmt_sliced_vbi_cap,
1089 	.vidioc_s_fmt_vid_cap           = cx18_s_fmt_vid_cap,
1090 	.vidioc_s_fmt_vbi_cap           = cx18_s_fmt_vbi_cap,
1091 	.vidioc_s_fmt_sliced_vbi_cap    = cx18_s_fmt_sliced_vbi_cap,
1092 	.vidioc_try_fmt_vid_cap         = cx18_try_fmt_vid_cap,
1093 	.vidioc_try_fmt_vbi_cap         = cx18_try_fmt_vbi_cap,
1094 	.vidioc_try_fmt_sliced_vbi_cap  = cx18_try_fmt_sliced_vbi_cap,
1095 	.vidioc_g_sliced_vbi_cap        = cx18_g_sliced_vbi_cap,
1096 #ifdef CONFIG_VIDEO_ADV_DEBUG
1097 	.vidioc_g_register              = cx18_g_register,
1098 	.vidioc_s_register              = cx18_s_register,
1099 #endif
1100 	.vidioc_default                 = cx18_default,
1101 	.vidioc_streamon                = cx18_streamon,
1102 	.vidioc_streamoff               = cx18_streamoff,
1103 	.vidioc_reqbufs                 = cx18_reqbufs,
1104 	.vidioc_querybuf                = cx18_querybuf,
1105 	.vidioc_qbuf                    = cx18_qbuf,
1106 	.vidioc_dqbuf                   = cx18_dqbuf,
1107 	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
1108 	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
1109 };
1110 
1111 void cx18_set_funcs(struct video_device *vdev)
1112 {
1113 	vdev->ioctl_ops = &cx18_ioctl_ops;
1114 }
1115