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 <linux/init.h>
21#include <linux/list.h>
22#include <linux/module.h>
23#include <linux/kernel.h>
24#include <linux/delay.h>
25
26#include <media/v4l2-common.h>
27#include <media/v4l2-event.h>
28
29#include "saa7134-reg.h"
30#include "saa7134.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
42static unsigned int debug;
43module_param(debug, int, 0644);
44MODULE_PARM_DESC(debug,"enable debug messages");
45
46#define dprintk(fmt, arg...)	if (debug)			\
47	printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
48
49/* ------------------------------------------------------------------ */
50
51static int start_streaming(struct vb2_queue *vq, unsigned int count)
52{
53	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
54	struct saa7134_dev *dev = dmaq->dev;
55	u32 leading_null_bytes = 0;
56	int err;
57
58	err = saa7134_ts_start_streaming(vq, count);
59	if (err)
60		return err;
61
62	/* If more cards start to need this, then this
63	   should probably be added to the card definitions. */
64	switch (dev->board) {
65	case SAA7134_BOARD_BEHOLD_M6:
66	case SAA7134_BOARD_BEHOLD_M63:
67	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
68		leading_null_bytes = 1;
69		break;
70	}
71	saa_call_all(dev, core, init, leading_null_bytes);
72	/* Unmute audio */
73	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
74			saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
75	dev->empress_started = 1;
76	return 0;
77}
78
79static void stop_streaming(struct vb2_queue *vq)
80{
81	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
82	struct saa7134_dev *dev = dmaq->dev;
83
84	saa7134_ts_stop_streaming(vq);
85	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
86	msleep(20);
87	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
88	msleep(100);
89	/* Mute audio */
90	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
91			saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
92	dev->empress_started = 0;
93}
94
95static struct vb2_ops saa7134_empress_qops = {
96	.queue_setup	= saa7134_ts_queue_setup,
97	.buf_init	= saa7134_ts_buffer_init,
98	.buf_prepare	= saa7134_ts_buffer_prepare,
99	.buf_queue	= saa7134_vb2_buffer_queue,
100	.wait_prepare	= vb2_ops_wait_prepare,
101	.wait_finish	= vb2_ops_wait_finish,
102	.start_streaming = start_streaming,
103	.stop_streaming = stop_streaming,
104};
105
106/* ------------------------------------------------------------------ */
107
108static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
109					struct v4l2_fmtdesc *f)
110{
111	if (f->index != 0)
112		return -EINVAL;
113
114	strlcpy(f->description, "MPEG TS", sizeof(f->description));
115	f->pixelformat = V4L2_PIX_FMT_MPEG;
116	f->flags = V4L2_FMT_FLAG_COMPRESSED;
117	return 0;
118}
119
120static int empress_g_fmt_vid_cap(struct file *file, void *priv,
121				struct v4l2_format *f)
122{
123	struct saa7134_dev *dev = video_drvdata(file);
124	struct v4l2_mbus_framefmt mbus_fmt;
125
126	saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
127
128	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
129	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
130	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
131	f->fmt.pix.bytesperline = 0;
132
133	return 0;
134}
135
136static int empress_s_fmt_vid_cap(struct file *file, void *priv,
137				struct v4l2_format *f)
138{
139	struct saa7134_dev *dev = video_drvdata(file);
140	struct v4l2_mbus_framefmt mbus_fmt;
141
142	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
143	saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
144	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
145
146	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
147	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
148	f->fmt.pix.bytesperline = 0;
149
150	return 0;
151}
152
153static int empress_try_fmt_vid_cap(struct file *file, void *priv,
154				struct v4l2_format *f)
155{
156	struct saa7134_dev *dev = video_drvdata(file);
157	struct v4l2_mbus_framefmt mbus_fmt;
158
159	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
160	saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt);
161	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
162
163	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
164	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
165	f->fmt.pix.bytesperline = 0;
166
167	return 0;
168}
169
170static const struct v4l2_file_operations ts_fops =
171{
172	.owner	  = THIS_MODULE,
173	.open	  = v4l2_fh_open,
174	.release  = vb2_fop_release,
175	.read	  = vb2_fop_read,
176	.poll	  = vb2_fop_poll,
177	.mmap	  = vb2_fop_mmap,
178	.unlocked_ioctl = video_ioctl2,
179};
180
181static const struct v4l2_ioctl_ops ts_ioctl_ops = {
182	.vidioc_querycap		= saa7134_querycap,
183	.vidioc_enum_fmt_vid_cap	= empress_enum_fmt_vid_cap,
184	.vidioc_try_fmt_vid_cap		= empress_try_fmt_vid_cap,
185	.vidioc_s_fmt_vid_cap		= empress_s_fmt_vid_cap,
186	.vidioc_g_fmt_vid_cap		= empress_g_fmt_vid_cap,
187	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
188	.vidioc_querybuf		= vb2_ioctl_querybuf,
189	.vidioc_qbuf			= vb2_ioctl_qbuf,
190	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
191	.vidioc_streamon		= vb2_ioctl_streamon,
192	.vidioc_streamoff		= vb2_ioctl_streamoff,
193	.vidioc_g_frequency		= saa7134_g_frequency,
194	.vidioc_s_frequency		= saa7134_s_frequency,
195	.vidioc_g_tuner			= saa7134_g_tuner,
196	.vidioc_s_tuner			= saa7134_s_tuner,
197	.vidioc_enum_input		= saa7134_enum_input,
198	.vidioc_g_input			= saa7134_g_input,
199	.vidioc_s_input			= saa7134_s_input,
200	.vidioc_s_std			= saa7134_s_std,
201	.vidioc_g_std			= saa7134_g_std,
202	.vidioc_querystd		= saa7134_querystd,
203	.vidioc_log_status		= v4l2_ctrl_log_status,
204	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
205	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
206};
207
208/* ----------------------------------------------------------- */
209
210static struct video_device saa7134_empress_template = {
211	.name          = "saa7134-empress",
212	.fops          = &ts_fops,
213	.ioctl_ops     = &ts_ioctl_ops,
214
215	.tvnorms			= SAA7134_NORMS,
216};
217
218static void empress_signal_update(struct work_struct *work)
219{
220	struct saa7134_dev* dev =
221		container_of(work, struct saa7134_dev, empress_workqueue);
222
223	if (dev->nosignal) {
224		dprintk("no video signal\n");
225	} else {
226		dprintk("video signal acquired\n");
227	}
228}
229
230static void empress_signal_change(struct saa7134_dev *dev)
231{
232	schedule_work(&dev->empress_workqueue);
233}
234
235static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
236{
237	switch (ctrl->id) {
238	case V4L2_CID_BRIGHTNESS:
239	case V4L2_CID_HUE:
240	case V4L2_CID_CONTRAST:
241	case V4L2_CID_SATURATION:
242	case V4L2_CID_AUDIO_MUTE:
243	case V4L2_CID_AUDIO_VOLUME:
244	case V4L2_CID_PRIVATE_INVERT:
245	case V4L2_CID_PRIVATE_AUTOMUTE:
246		return true;
247	default:
248		return false;
249	}
250}
251
252static int empress_init(struct saa7134_dev *dev)
253{
254	struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
255	struct vb2_queue *q;
256	int err;
257
258	dprintk("%s: %s\n",dev->name,__func__);
259	dev->empress_dev = video_device_alloc();
260	if (NULL == dev->empress_dev)
261		return -ENOMEM;
262	*(dev->empress_dev) = saa7134_empress_template;
263	dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
264	dev->empress_dev->release = video_device_release;
265	dev->empress_dev->lock = &dev->lock;
266	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
267		 "%s empress (%s)", dev->name,
268		 saa7134_boards[dev->board].name);
269	v4l2_ctrl_handler_init(hdl, 21);
270	v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
271	if (dev->empress_sd)
272		v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
273	if (hdl->error) {
274		video_device_release(dev->empress_dev);
275		return hdl->error;
276	}
277	dev->empress_dev->ctrl_handler = hdl;
278
279	INIT_WORK(&dev->empress_workqueue, empress_signal_update);
280
281	q = &dev->empress_vbq;
282	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
283	/*
284	 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
285	 * transfers that do not start at the beginning of a page. A USERPTR
286	 * can start anywhere in a page, so USERPTR support is a no-go.
287	 */
288	q->io_modes = VB2_MMAP | VB2_READ;
289	q->drv_priv = &dev->ts_q;
290	q->ops = &saa7134_empress_qops;
291	q->gfp_flags = GFP_DMA32;
292	q->mem_ops = &vb2_dma_sg_memops;
293	q->buf_struct_size = sizeof(struct saa7134_buf);
294	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
295	q->lock = &dev->lock;
296	err = vb2_queue_init(q);
297	if (err)
298		return err;
299	dev->empress_dev->queue = q;
300
301	video_set_drvdata(dev->empress_dev, dev);
302	err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
303				    empress_nr[dev->nr]);
304	if (err < 0) {
305		printk(KERN_INFO "%s: can't register video device\n",
306		       dev->name);
307		video_device_release(dev->empress_dev);
308		dev->empress_dev = NULL;
309		return err;
310	}
311	printk(KERN_INFO "%s: registered device %s [mpeg]\n",
312	       dev->name, video_device_node_name(dev->empress_dev));
313
314	empress_signal_update(&dev->empress_workqueue);
315	return 0;
316}
317
318static int empress_fini(struct saa7134_dev *dev)
319{
320	dprintk("%s: %s\n",dev->name,__func__);
321
322	if (NULL == dev->empress_dev)
323		return 0;
324	flush_work(&dev->empress_workqueue);
325	video_unregister_device(dev->empress_dev);
326	vb2_queue_release(&dev->empress_vbq);
327	v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
328	dev->empress_dev = NULL;
329	return 0;
330}
331
332static struct saa7134_mpeg_ops empress_ops = {
333	.type          = SAA7134_MPEG_EMPRESS,
334	.init          = empress_init,
335	.fini          = empress_fini,
336	.signal_change = empress_signal_change,
337};
338
339static int __init empress_register(void)
340{
341	return saa7134_ts_register(&empress_ops);
342}
343
344static void __exit empress_unregister(void)
345{
346	saa7134_ts_unregister(&empress_ops);
347}
348
349module_init(empress_register);
350module_exit(empress_unregister);
351