1/*
2 *
3 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
4 *
5 *  This program is free software; you can redistribute it and/or modify
6 *  it under the terms of the GNU General Public License as published by
7 *  the Free Software Foundation; either version 2 of the License, or
8 *  (at your option) any later version.
9 *
10 *  This program is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 *  GNU General Public License for more details.
14 *
15 *  You should have received a copy of the GNU General Public License
16 *  along with this program; if not, write to the Free Software
17 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#include "saa7134.h"
21#include "saa7134-reg.h"
22
23#include <linux/init.h>
24#include <linux/list.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/delay.h>
28
29#include <media/v4l2-common.h>
30#include <media/v4l2-event.h>
31
32/* ------------------------------------------------------------------ */
33
34MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
35MODULE_LICENSE("GPL");
36
37static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
38
39module_param_array(empress_nr, int, NULL, 0444);
40MODULE_PARM_DESC(empress_nr,"ts device number");
41
42/* ------------------------------------------------------------------ */
43
44static int start_streaming(struct vb2_queue *vq, unsigned int count)
45{
46	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
47	struct saa7134_dev *dev = dmaq->dev;
48	u32 leading_null_bytes = 0;
49	int err;
50
51	err = saa7134_ts_start_streaming(vq, count);
52	if (err)
53		return err;
54
55	/* If more cards start to need this, then this
56	   should probably be added to the card definitions. */
57	switch (dev->board) {
58	case SAA7134_BOARD_BEHOLD_M6:
59	case SAA7134_BOARD_BEHOLD_M63:
60	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
61		leading_null_bytes = 1;
62		break;
63	}
64	saa_call_all(dev, core, init, leading_null_bytes);
65	/* Unmute audio */
66	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
67			saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
68	dev->empress_started = 1;
69	return 0;
70}
71
72static void stop_streaming(struct vb2_queue *vq)
73{
74	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
75	struct saa7134_dev *dev = dmaq->dev;
76
77	saa7134_ts_stop_streaming(vq);
78	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
79	msleep(20);
80	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
81	msleep(100);
82	/* Mute audio */
83	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
84			saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
85	dev->empress_started = 0;
86}
87
88static struct vb2_ops saa7134_empress_qops = {
89	.queue_setup	= saa7134_ts_queue_setup,
90	.buf_init	= saa7134_ts_buffer_init,
91	.buf_prepare	= saa7134_ts_buffer_prepare,
92	.buf_queue	= saa7134_vb2_buffer_queue,
93	.wait_prepare	= vb2_ops_wait_prepare,
94	.wait_finish	= vb2_ops_wait_finish,
95	.start_streaming = start_streaming,
96	.stop_streaming = stop_streaming,
97};
98
99/* ------------------------------------------------------------------ */
100
101static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
102					struct v4l2_fmtdesc *f)
103{
104	if (f->index != 0)
105		return -EINVAL;
106
107	strlcpy(f->description, "MPEG TS", sizeof(f->description));
108	f->pixelformat = V4L2_PIX_FMT_MPEG;
109	f->flags = V4L2_FMT_FLAG_COMPRESSED;
110	return 0;
111}
112
113static int empress_g_fmt_vid_cap(struct file *file, void *priv,
114				struct v4l2_format *f)
115{
116	struct saa7134_dev *dev = video_drvdata(file);
117	struct v4l2_subdev_format fmt = {
118		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
119	};
120	struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
121
122	saa_call_all(dev, pad, get_fmt, NULL, &fmt);
123
124	v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
125	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
126	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
127	f->fmt.pix.bytesperline = 0;
128
129	return 0;
130}
131
132static int empress_s_fmt_vid_cap(struct file *file, void *priv,
133				struct v4l2_format *f)
134{
135	struct saa7134_dev *dev = video_drvdata(file);
136	struct v4l2_subdev_format format = {
137		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
138	};
139
140	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
141	saa_call_all(dev, pad, set_fmt, NULL, &format);
142	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
143
144	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
145	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
146	f->fmt.pix.bytesperline = 0;
147
148	return 0;
149}
150
151static int empress_try_fmt_vid_cap(struct file *file, void *priv,
152				struct v4l2_format *f)
153{
154	struct saa7134_dev *dev = video_drvdata(file);
155	struct v4l2_subdev_pad_config pad_cfg;
156	struct v4l2_subdev_format format = {
157		.which = V4L2_SUBDEV_FORMAT_TRY,
158	};
159
160	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
161	saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
162	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
163
164	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
165	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
166	f->fmt.pix.bytesperline = 0;
167
168	return 0;
169}
170
171static const struct v4l2_file_operations ts_fops =
172{
173	.owner	  = THIS_MODULE,
174	.open	  = v4l2_fh_open,
175	.release  = vb2_fop_release,
176	.read	  = vb2_fop_read,
177	.poll	  = vb2_fop_poll,
178	.mmap	  = vb2_fop_mmap,
179	.unlocked_ioctl = video_ioctl2,
180};
181
182static const struct v4l2_ioctl_ops ts_ioctl_ops = {
183	.vidioc_querycap		= saa7134_querycap,
184	.vidioc_enum_fmt_vid_cap	= empress_enum_fmt_vid_cap,
185	.vidioc_try_fmt_vid_cap		= empress_try_fmt_vid_cap,
186	.vidioc_s_fmt_vid_cap		= empress_s_fmt_vid_cap,
187	.vidioc_g_fmt_vid_cap		= empress_g_fmt_vid_cap,
188	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
189	.vidioc_querybuf		= vb2_ioctl_querybuf,
190	.vidioc_qbuf			= vb2_ioctl_qbuf,
191	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
192	.vidioc_streamon		= vb2_ioctl_streamon,
193	.vidioc_streamoff		= vb2_ioctl_streamoff,
194	.vidioc_g_frequency		= saa7134_g_frequency,
195	.vidioc_s_frequency		= saa7134_s_frequency,
196	.vidioc_g_tuner			= saa7134_g_tuner,
197	.vidioc_s_tuner			= saa7134_s_tuner,
198	.vidioc_enum_input		= saa7134_enum_input,
199	.vidioc_g_input			= saa7134_g_input,
200	.vidioc_s_input			= saa7134_s_input,
201	.vidioc_s_std			= saa7134_s_std,
202	.vidioc_g_std			= saa7134_g_std,
203	.vidioc_querystd		= saa7134_querystd,
204	.vidioc_log_status		= v4l2_ctrl_log_status,
205	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
206	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
207};
208
209/* ----------------------------------------------------------- */
210
211static struct video_device saa7134_empress_template = {
212	.name          = "saa7134-empress",
213	.fops          = &ts_fops,
214	.ioctl_ops     = &ts_ioctl_ops,
215
216	.tvnorms			= SAA7134_NORMS,
217};
218
219static void empress_signal_update(struct work_struct *work)
220{
221	struct saa7134_dev* dev =
222		container_of(work, struct saa7134_dev, empress_workqueue);
223
224	if (dev->nosignal) {
225		pr_debug("no video signal\n");
226	} else {
227		pr_debug("video signal acquired\n");
228	}
229}
230
231static void empress_signal_change(struct saa7134_dev *dev)
232{
233	schedule_work(&dev->empress_workqueue);
234}
235
236static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
237{
238	switch (ctrl->id) {
239	case V4L2_CID_BRIGHTNESS:
240	case V4L2_CID_HUE:
241	case V4L2_CID_CONTRAST:
242	case V4L2_CID_SATURATION:
243	case V4L2_CID_AUDIO_MUTE:
244	case V4L2_CID_AUDIO_VOLUME:
245	case V4L2_CID_PRIVATE_INVERT:
246	case V4L2_CID_PRIVATE_AUTOMUTE:
247		return true;
248	default:
249		return false;
250	}
251}
252
253static int empress_init(struct saa7134_dev *dev)
254{
255	struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
256	struct vb2_queue *q;
257	int err;
258
259	pr_debug("%s: %s\n", dev->name, __func__);
260	dev->empress_dev = video_device_alloc();
261	if (NULL == dev->empress_dev)
262		return -ENOMEM;
263	*(dev->empress_dev) = saa7134_empress_template;
264	dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
265	dev->empress_dev->release = video_device_release;
266	dev->empress_dev->lock = &dev->lock;
267	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
268		 "%s empress (%s)", dev->name,
269		 saa7134_boards[dev->board].name);
270	v4l2_ctrl_handler_init(hdl, 21);
271	v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
272	if (dev->empress_sd)
273		v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
274	if (hdl->error) {
275		video_device_release(dev->empress_dev);
276		return hdl->error;
277	}
278	dev->empress_dev->ctrl_handler = hdl;
279
280	INIT_WORK(&dev->empress_workqueue, empress_signal_update);
281
282	q = &dev->empress_vbq;
283	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
284	/*
285	 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
286	 * transfers that do not start at the beginning of a page. A USERPTR
287	 * can start anywhere in a page, so USERPTR support is a no-go.
288	 */
289	q->io_modes = VB2_MMAP | VB2_READ;
290	q->drv_priv = &dev->ts_q;
291	q->ops = &saa7134_empress_qops;
292	q->gfp_flags = GFP_DMA32;
293	q->mem_ops = &vb2_dma_sg_memops;
294	q->buf_struct_size = sizeof(struct saa7134_buf);
295	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
296	q->lock = &dev->lock;
297	err = vb2_queue_init(q);
298	if (err)
299		return err;
300	dev->empress_dev->queue = q;
301
302	video_set_drvdata(dev->empress_dev, dev);
303	err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
304				    empress_nr[dev->nr]);
305	if (err < 0) {
306		pr_info("%s: can't register video device\n",
307		       dev->name);
308		video_device_release(dev->empress_dev);
309		dev->empress_dev = NULL;
310		return err;
311	}
312	pr_info("%s: registered device %s [mpeg]\n",
313	       dev->name, video_device_node_name(dev->empress_dev));
314
315	empress_signal_update(&dev->empress_workqueue);
316	return 0;
317}
318
319static int empress_fini(struct saa7134_dev *dev)
320{
321	pr_debug("%s: %s\n", dev->name, __func__);
322
323	if (NULL == dev->empress_dev)
324		return 0;
325	flush_work(&dev->empress_workqueue);
326	video_unregister_device(dev->empress_dev);
327	vb2_queue_release(&dev->empress_vbq);
328	v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
329	dev->empress_dev = NULL;
330	return 0;
331}
332
333static struct saa7134_mpeg_ops empress_ops = {
334	.type          = SAA7134_MPEG_EMPRESS,
335	.init          = empress_init,
336	.fini          = empress_fini,
337	.signal_change = empress_signal_change,
338};
339
340static int __init empress_register(void)
341{
342	return saa7134_ts_register(&empress_ops);
343}
344
345static void __exit empress_unregister(void)
346{
347	saa7134_ts_unregister(&empress_ops);
348}
349
350module_init(empress_register);
351module_exit(empress_unregister);
352