summaryrefslogtreecommitdiff
path: root/drivers/media/pci/saa7134/saa7134-empress.c
blob: 39e3c7f8c5b46a00351c8f01838a6fdbb8d03817 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 */

#include "saa7134.h"
#include "saa7134-reg.h"

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>

#include <media/v4l2-common.h>
#include <media/v4l2-event.h>

/* ------------------------------------------------------------------ */

MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");

static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };

module_param_array(empress_nr, int, NULL, 0444);
MODULE_PARM_DESC(empress_nr,"ts device number");

/* ------------------------------------------------------------------ */

static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
	struct saa7134_dev *dev = dmaq->dev;
	u32 leading_null_bytes = 0;
	int err;

	err = saa7134_ts_start_streaming(vq, count);
	if (err)
		return err;

	/* If more cards start to need this, then this
	   should probably be added to the card definitions. */
	switch (dev->board) {
	case SAA7134_BOARD_BEHOLD_M6:
	case SAA7134_BOARD_BEHOLD_M63:
	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
		leading_null_bytes = 1;
		break;
	}
	saa_call_all(dev, core, init, leading_null_bytes);
	/* Unmute audio */
	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
			saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
	dev->empress_started = 1;
	return 0;
}

static void stop_streaming(struct vb2_queue *vq)
{
	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
	struct saa7134_dev *dev = dmaq->dev;

	saa7134_ts_stop_streaming(vq);
	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
	msleep(20);
	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
	msleep(100);
	/* Mute audio */
	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
			saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
	dev->empress_started = 0;
}

static const struct vb2_ops saa7134_empress_qops = {
	.queue_setup	= saa7134_ts_queue_setup,
	.buf_init	= saa7134_ts_buffer_init,
	.buf_prepare	= saa7134_ts_buffer_prepare,
	.buf_queue	= saa7134_vb2_buffer_queue,
	.wait_prepare	= vb2_ops_wait_prepare,
	.wait_finish	= vb2_ops_wait_finish,
	.start_streaming = start_streaming,
	.stop_streaming = stop_streaming,
};

/* ------------------------------------------------------------------ */

static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
					struct v4l2_fmtdesc *f)
{
	if (f->index != 0)
		return -EINVAL;

	f->pixelformat = V4L2_PIX_FMT_MPEG;
	return 0;
}

static int empress_g_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct saa7134_dev *dev = video_drvdata(file);
	struct v4l2_subdev_format fmt = {
		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
	};
	struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;

	saa_call_all(dev, pad, get_fmt, NULL, &fmt);

	v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
	f->fmt.pix.bytesperline = 0;

	return 0;
}

static int empress_s_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct saa7134_dev *dev = video_drvdata(file);
	struct v4l2_subdev_format format = {
		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
	};

	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
	saa_call_all(dev, pad, set_fmt, NULL, &format);
	v4l2_fill_pix_format(&f->fmt.pix, &format.format);

	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
	f->fmt.pix.bytesperline = 0;

	return 0;
}

static int empress_try_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct saa7134_dev *dev = video_drvdata(file);
	struct v4l2_subdev_pad_config pad_cfg;
	struct v4l2_subdev_format format = {
		.which = V4L2_SUBDEV_FORMAT_TRY,
	};

	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
	saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
	v4l2_fill_pix_format(&f->fmt.pix, &format.format);

	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
	f->fmt.pix.bytesperline = 0;

	return 0;
}

static const struct v4l2_file_operations ts_fops =
{
	.owner	  = THIS_MODULE,
	.open	  = v4l2_fh_open,
	.release  = vb2_fop_release,
	.read	  = vb2_fop_read,
	.poll	  = vb2_fop_poll,
	.mmap	  = vb2_fop_mmap,
	.unlocked_ioctl = video_ioctl2,
};

static const struct v4l2_ioctl_ops ts_ioctl_ops = {
	.vidioc_querycap		= saa7134_querycap,
	.vidioc_enum_fmt_vid_cap	= empress_enum_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap		= empress_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap		= empress_s_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap		= empress_g_fmt_vid_cap,
	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
	.vidioc_querybuf		= vb2_ioctl_querybuf,
	.vidioc_qbuf			= vb2_ioctl_qbuf,
	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
	.vidioc_expbuf			= vb2_ioctl_expbuf,
	.vidioc_streamon		= vb2_ioctl_streamon,
	.vidioc_streamoff		= vb2_ioctl_streamoff,
	.vidioc_g_frequency		= saa7134_g_frequency,
	.vidioc_s_frequency		= saa7134_s_frequency,
	.vidioc_g_tuner			= saa7134_g_tuner,
	.vidioc_s_tuner			= saa7134_s_tuner,
	.vidioc_enum_input		= saa7134_enum_input,
	.vidioc_g_input			= saa7134_g_input,
	.vidioc_s_input			= saa7134_s_input,
	.vidioc_s_std			= saa7134_s_std,
	.vidioc_g_std			= saa7134_g_std,
	.vidioc_querystd		= saa7134_querystd,
	.vidioc_log_status		= v4l2_ctrl_log_status,
	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
};

/* ----------------------------------------------------------- */

static const struct video_device saa7134_empress_template = {
	.name          = "saa7134-empress",
	.fops          = &ts_fops,
	.ioctl_ops     = &ts_ioctl_ops,

	.tvnorms			= SAA7134_NORMS,
};

static void empress_signal_update(struct work_struct *work)
{
	struct saa7134_dev* dev =
		container_of(work, struct saa7134_dev, empress_workqueue);

	if (dev->nosignal) {
		pr_debug("no video signal\n");
	} else {
		pr_debug("video signal acquired\n");
	}
}

static void empress_signal_change(struct saa7134_dev *dev)
{
	schedule_work(&dev->empress_workqueue);
}

static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
{
	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	case V4L2_CID_HUE:
	case V4L2_CID_CONTRAST:
	case V4L2_CID_SATURATION:
	case V4L2_CID_AUDIO_MUTE:
	case V4L2_CID_AUDIO_VOLUME:
	case V4L2_CID_PRIVATE_INVERT:
	case V4L2_CID_PRIVATE_AUTOMUTE:
		return true;
	default:
		return false;
	}
}

static int empress_init(struct saa7134_dev *dev)
{
	struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
	struct vb2_queue *q;
	int err;

	pr_debug("%s: %s\n", dev->name, __func__);
	dev->empress_dev = video_device_alloc();
	if (NULL == dev->empress_dev)
		return -ENOMEM;
	*(dev->empress_dev) = saa7134_empress_template;
	dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
	dev->empress_dev->release = video_device_release;
	dev->empress_dev->lock = &dev->lock;
	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
		 "%s empress (%s)", dev->name,
		 saa7134_boards[dev->board].name);
	v4l2_ctrl_handler_init(hdl, 21);
	v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
	if (dev->empress_sd)
		v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
	if (hdl->error) {
		video_device_release(dev->empress_dev);
		return hdl->error;
	}
	dev->empress_dev->ctrl_handler = hdl;

	INIT_WORK(&dev->empress_workqueue, empress_signal_update);

	q = &dev->empress_vbq;
	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	/*
	 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
	 * transfers that do not start at the beginning of a page. A USERPTR
	 * can start anywhere in a page, so USERPTR support is a no-go.
	 */
	q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
	q->drv_priv = &dev->ts_q;
	q->ops = &saa7134_empress_qops;
	q->gfp_flags = GFP_DMA32;
	q->mem_ops = &vb2_dma_sg_memops;
	q->buf_struct_size = sizeof(struct saa7134_buf);
	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
	q->lock = &dev->lock;
	q->dev = &dev->pci->dev;
	err = vb2_queue_init(q);
	if (err)
		return err;
	dev->empress_dev->queue = q;
	dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
					V4L2_CAP_VIDEO_CAPTURE;
	if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
		dev->empress_dev->device_caps |= V4L2_CAP_TUNER;

	video_set_drvdata(dev->empress_dev, dev);
	err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO,
				    empress_nr[dev->nr]);
	if (err < 0) {
		pr_info("%s: can't register video device\n",
		       dev->name);
		video_device_release(dev->empress_dev);
		dev->empress_dev = NULL;
		return err;
	}
	pr_info("%s: registered device %s [mpeg]\n",
	       dev->name, video_device_node_name(dev->empress_dev));

	empress_signal_update(&dev->empress_workqueue);
	return 0;
}

static int empress_fini(struct saa7134_dev *dev)
{
	pr_debug("%s: %s\n", dev->name, __func__);

	if (NULL == dev->empress_dev)
		return 0;
	flush_work(&dev->empress_workqueue);
	vb2_video_unregister_device(dev->empress_dev);
	v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
	dev->empress_dev = NULL;
	return 0;
}

static struct saa7134_mpeg_ops empress_ops = {
	.type          = SAA7134_MPEG_EMPRESS,
	.init          = empress_init,
	.fini          = empress_fini,
	.signal_change = empress_signal_change,
};

static int __init empress_register(void)
{
	return saa7134_ts_register(&empress_ops);
}

static void __exit empress_unregister(void)
{
	saa7134_ts_unregister(&empress_ops);
}

module_init(empress_register);
module_exit(empress_unregister);