1 /*
2  * vivid-vbi-cap.c - vbi capture support functions.
3  *
4  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
5  *
6  * This program is free software; you may redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
11  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
13  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
14  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
15  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
16  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17  * SOFTWARE.
18  */
19 
20 #include <linux/errno.h>
21 #include <linux/kernel.h>
22 #include <linux/videodev2.h>
23 #include <media/v4l2-common.h>
24 
25 #include "vivid-core.h"
26 #include "vivid-kthread-cap.h"
27 #include "vivid-vbi-cap.h"
28 #include "vivid-vbi-gen.h"
29 
vivid_sliced_vbi_cap_fill(struct vivid_dev * dev,unsigned seqnr)30 static void vivid_sliced_vbi_cap_fill(struct vivid_dev *dev, unsigned seqnr)
31 {
32 	struct vivid_vbi_gen_data *vbi_gen = &dev->vbi_gen;
33 	bool is_60hz = dev->std_cap & V4L2_STD_525_60;
34 
35 	vivid_vbi_gen_sliced(vbi_gen, is_60hz, seqnr);
36 
37 	if (!is_60hz) {
38 		if (dev->loop_video) {
39 			if (dev->vbi_out_have_wss) {
40 				vbi_gen->data[12].data[0] = dev->vbi_out_wss[0];
41 				vbi_gen->data[12].data[1] = dev->vbi_out_wss[1];
42 			} else {
43 				vbi_gen->data[12].id = 0;
44 			}
45 		} else {
46 			switch (tpg_g_video_aspect(&dev->tpg)) {
47 			case TPG_VIDEO_ASPECT_14X9_CENTRE:
48 				vbi_gen->data[12].data[0] = 0x01;
49 				break;
50 			case TPG_VIDEO_ASPECT_16X9_CENTRE:
51 				vbi_gen->data[12].data[0] = 0x0b;
52 				break;
53 			case TPG_VIDEO_ASPECT_16X9_ANAMORPHIC:
54 				vbi_gen->data[12].data[0] = 0x07;
55 				break;
56 			case TPG_VIDEO_ASPECT_4X3:
57 			default:
58 				vbi_gen->data[12].data[0] = 0x08;
59 				break;
60 			}
61 		}
62 	} else if (dev->loop_video && is_60hz) {
63 		if (dev->vbi_out_have_cc[0]) {
64 			vbi_gen->data[0].data[0] = dev->vbi_out_cc[0][0];
65 			vbi_gen->data[0].data[1] = dev->vbi_out_cc[0][1];
66 		} else {
67 			vbi_gen->data[0].id = 0;
68 		}
69 		if (dev->vbi_out_have_cc[1]) {
70 			vbi_gen->data[1].data[0] = dev->vbi_out_cc[1][0];
71 			vbi_gen->data[1].data[1] = dev->vbi_out_cc[1][1];
72 		} else {
73 			vbi_gen->data[1].id = 0;
74 		}
75 	}
76 }
77 
vivid_g_fmt_vbi_cap(struct vivid_dev * dev,struct v4l2_vbi_format * vbi)78 static void vivid_g_fmt_vbi_cap(struct vivid_dev *dev, struct v4l2_vbi_format *vbi)
79 {
80 	bool is_60hz = dev->std_cap & V4L2_STD_525_60;
81 
82 	vbi->sampling_rate = 27000000;
83 	vbi->offset = 24;
84 	vbi->samples_per_line = 1440;
85 	vbi->sample_format = V4L2_PIX_FMT_GREY;
86 	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
87 	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
88 	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
89 	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
90 	vbi->reserved[0] = 0;
91 	vbi->reserved[1] = 0;
92 }
93 
vivid_raw_vbi_cap_process(struct vivid_dev * dev,struct vivid_buffer * buf)94 void vivid_raw_vbi_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
95 {
96 	struct v4l2_vbi_format vbi;
97 	u8 *vbuf = vb2_plane_vaddr(&buf->vb, 0);
98 
99 	vivid_g_fmt_vbi_cap(dev, &vbi);
100 	buf->vb.v4l2_buf.sequence = dev->vbi_cap_seq_count;
101 	if (dev->field_cap == V4L2_FIELD_ALTERNATE)
102 		buf->vb.v4l2_buf.sequence /= 2;
103 
104 	vivid_sliced_vbi_cap_fill(dev, buf->vb.v4l2_buf.sequence);
105 
106 	memset(vbuf, 0x10, vb2_plane_size(&buf->vb, 0));
107 
108 	if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode))
109 		vivid_vbi_gen_raw(&dev->vbi_gen, &vbi, vbuf);
110 
111 	v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
112 	buf->vb.v4l2_buf.timestamp.tv_sec += dev->time_wrap_offset;
113 }
114 
115 
vivid_sliced_vbi_cap_process(struct vivid_dev * dev,struct vivid_buffer * buf)116 void vivid_sliced_vbi_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
117 {
118 	struct v4l2_sliced_vbi_data *vbuf = vb2_plane_vaddr(&buf->vb, 0);
119 
120 	buf->vb.v4l2_buf.sequence = dev->vbi_cap_seq_count;
121 	if (dev->field_cap == V4L2_FIELD_ALTERNATE)
122 		buf->vb.v4l2_buf.sequence /= 2;
123 
124 	vivid_sliced_vbi_cap_fill(dev, buf->vb.v4l2_buf.sequence);
125 
126 	memset(vbuf, 0, vb2_plane_size(&buf->vb, 0));
127 	if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode)) {
128 		unsigned i;
129 
130 		for (i = 0; i < 25; i++)
131 			vbuf[i] = dev->vbi_gen.data[i];
132 	}
133 
134 	v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
135 	buf->vb.v4l2_buf.timestamp.tv_sec += dev->time_wrap_offset;
136 }
137 
vbi_cap_queue_setup(struct vb2_queue * vq,const struct v4l2_format * fmt,unsigned * nbuffers,unsigned * nplanes,unsigned sizes[],void * alloc_ctxs[])138 static int vbi_cap_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
139 		       unsigned *nbuffers, unsigned *nplanes,
140 		       unsigned sizes[], void *alloc_ctxs[])
141 {
142 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
143 	bool is_60hz = dev->std_cap & V4L2_STD_525_60;
144 	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
145 		36 * sizeof(struct v4l2_sliced_vbi_data) :
146 		1440 * 2 * (is_60hz ? 12 : 18);
147 
148 	if (!vivid_is_sdtv_cap(dev))
149 		return -EINVAL;
150 
151 	sizes[0] = size;
152 
153 	if (vq->num_buffers + *nbuffers < 2)
154 		*nbuffers = 2 - vq->num_buffers;
155 
156 	*nplanes = 1;
157 	return 0;
158 }
159 
vbi_cap_buf_prepare(struct vb2_buffer * vb)160 static int vbi_cap_buf_prepare(struct vb2_buffer *vb)
161 {
162 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
163 	bool is_60hz = dev->std_cap & V4L2_STD_525_60;
164 	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
165 		36 * sizeof(struct v4l2_sliced_vbi_data) :
166 		1440 * 2 * (is_60hz ? 12 : 18);
167 
168 	dprintk(dev, 1, "%s\n", __func__);
169 
170 	if (dev->buf_prepare_error) {
171 		/*
172 		 * Error injection: test what happens if buf_prepare() returns
173 		 * an error.
174 		 */
175 		dev->buf_prepare_error = false;
176 		return -EINVAL;
177 	}
178 	if (vb2_plane_size(vb, 0) < size) {
179 		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
180 				__func__, vb2_plane_size(vb, 0), size);
181 		return -EINVAL;
182 	}
183 	vb2_set_plane_payload(vb, 0, size);
184 
185 	return 0;
186 }
187 
vbi_cap_buf_queue(struct vb2_buffer * vb)188 static void vbi_cap_buf_queue(struct vb2_buffer *vb)
189 {
190 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
191 	struct vivid_buffer *buf = container_of(vb, struct vivid_buffer, vb);
192 
193 	dprintk(dev, 1, "%s\n", __func__);
194 
195 	spin_lock(&dev->slock);
196 	list_add_tail(&buf->list, &dev->vbi_cap_active);
197 	spin_unlock(&dev->slock);
198 }
199 
vbi_cap_start_streaming(struct vb2_queue * vq,unsigned count)200 static int vbi_cap_start_streaming(struct vb2_queue *vq, unsigned count)
201 {
202 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
203 	int err;
204 
205 	dprintk(dev, 1, "%s\n", __func__);
206 	dev->vbi_cap_seq_count = 0;
207 	if (dev->start_streaming_error) {
208 		dev->start_streaming_error = false;
209 		err = -EINVAL;
210 	} else {
211 		err = vivid_start_generating_vid_cap(dev, &dev->vbi_cap_streaming);
212 	}
213 	if (err) {
214 		struct vivid_buffer *buf, *tmp;
215 
216 		list_for_each_entry_safe(buf, tmp, &dev->vbi_cap_active, list) {
217 			list_del(&buf->list);
218 			vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
219 		}
220 	}
221 	return err;
222 }
223 
224 /* abort streaming and wait for last buffer */
vbi_cap_stop_streaming(struct vb2_queue * vq)225 static void vbi_cap_stop_streaming(struct vb2_queue *vq)
226 {
227 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
228 
229 	dprintk(dev, 1, "%s\n", __func__);
230 	vivid_stop_generating_vid_cap(dev, &dev->vbi_cap_streaming);
231 }
232 
233 const struct vb2_ops vivid_vbi_cap_qops = {
234 	.queue_setup		= vbi_cap_queue_setup,
235 	.buf_prepare		= vbi_cap_buf_prepare,
236 	.buf_queue		= vbi_cap_buf_queue,
237 	.start_streaming	= vbi_cap_start_streaming,
238 	.stop_streaming		= vbi_cap_stop_streaming,
239 	.wait_prepare		= vb2_ops_wait_prepare,
240 	.wait_finish		= vb2_ops_wait_finish,
241 };
242 
vidioc_g_fmt_vbi_cap(struct file * file,void * priv,struct v4l2_format * f)243 int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
244 					struct v4l2_format *f)
245 {
246 	struct vivid_dev *dev = video_drvdata(file);
247 	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
248 
249 	if (!vivid_is_sdtv_cap(dev) || !dev->has_raw_vbi_cap)
250 		return -EINVAL;
251 
252 	vivid_g_fmt_vbi_cap(dev, vbi);
253 	return 0;
254 }
255 
vidioc_s_fmt_vbi_cap(struct file * file,void * priv,struct v4l2_format * f)256 int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
257 					struct v4l2_format *f)
258 {
259 	struct vivid_dev *dev = video_drvdata(file);
260 	int ret = vidioc_g_fmt_vbi_cap(file, priv, f);
261 
262 	if (ret)
263 		return ret;
264 	if (dev->stream_sliced_vbi_cap && vb2_is_busy(&dev->vb_vbi_cap_q))
265 		return -EBUSY;
266 	dev->stream_sliced_vbi_cap = false;
267 	dev->vbi_cap_dev.queue->type = V4L2_BUF_TYPE_VBI_CAPTURE;
268 	return 0;
269 }
270 
vivid_fill_service_lines(struct v4l2_sliced_vbi_format * vbi,u32 service_set)271 void vivid_fill_service_lines(struct v4l2_sliced_vbi_format *vbi, u32 service_set)
272 {
273 	vbi->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
274 	vbi->service_set = service_set;
275 	memset(vbi->service_lines, 0, sizeof(vbi->service_lines));
276 	memset(vbi->reserved, 0, sizeof(vbi->reserved));
277 
278 	if (vbi->service_set == 0)
279 		return;
280 
281 	if (vbi->service_set & V4L2_SLICED_CAPTION_525) {
282 		vbi->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
283 		vbi->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
284 	}
285 	if (vbi->service_set & V4L2_SLICED_WSS_625) {
286 		unsigned i;
287 
288 		for (i = 7; i <= 18; i++)
289 			vbi->service_lines[0][i] =
290 			vbi->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
291 		vbi->service_lines[0][23] = V4L2_SLICED_WSS_625;
292 	}
293 }
294 
vidioc_g_fmt_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_format * fmt)295 int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
296 {
297 	struct vivid_dev *dev = video_drvdata(file);
298 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
299 
300 	if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
301 		return -EINVAL;
302 
303 	vivid_fill_service_lines(vbi, dev->service_set_cap);
304 	return 0;
305 }
306 
vidioc_try_fmt_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_format * fmt)307 int vidioc_try_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
308 {
309 	struct vivid_dev *dev = video_drvdata(file);
310 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
311 	bool is_60hz = dev->std_cap & V4L2_STD_525_60;
312 	u32 service_set = vbi->service_set;
313 
314 	if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
315 		return -EINVAL;
316 
317 	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
318 				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
319 	vivid_fill_service_lines(vbi, service_set);
320 	return 0;
321 }
322 
vidioc_s_fmt_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_format * fmt)323 int vidioc_s_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
324 {
325 	struct vivid_dev *dev = video_drvdata(file);
326 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
327 	int ret = vidioc_try_fmt_sliced_vbi_cap(file, fh, fmt);
328 
329 	if (ret)
330 		return ret;
331 	if (!dev->stream_sliced_vbi_cap && vb2_is_busy(&dev->vb_vbi_cap_q))
332 		return -EBUSY;
333 	dev->service_set_cap = vbi->service_set;
334 	dev->stream_sliced_vbi_cap = true;
335 	dev->vbi_cap_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
336 	return 0;
337 }
338 
vidioc_g_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_sliced_vbi_cap * cap)339 int vidioc_g_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_sliced_vbi_cap *cap)
340 {
341 	struct vivid_dev *dev = video_drvdata(file);
342 	struct video_device *vdev = video_devdata(file);
343 	bool is_60hz;
344 
345 	if (vdev->vfl_dir == VFL_DIR_RX) {
346 		is_60hz = dev->std_cap & V4L2_STD_525_60;
347 		if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap ||
348 		    cap->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
349 			return -EINVAL;
350 	} else {
351 		is_60hz = dev->std_out & V4L2_STD_525_60;
352 		if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out ||
353 		    cap->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT)
354 			return -EINVAL;
355 	}
356 
357 	cap->service_set = is_60hz ? V4L2_SLICED_CAPTION_525 :
358 				     V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
359 	if (is_60hz) {
360 		cap->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
361 		cap->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
362 	} else {
363 		unsigned i;
364 
365 		for (i = 7; i <= 18; i++)
366 			cap->service_lines[0][i] =
367 			cap->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
368 		cap->service_lines[0][23] = V4L2_SLICED_WSS_625;
369 	}
370 	return 0;
371 }
372