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 
34 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
35 MODULE_LICENSE("GPL");
36 
37 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
38 
39 module_param_array(empress_nr, int, NULL, 0444);
40 MODULE_PARM_DESC(empress_nr,"ts device number");
41 
42 static unsigned int debug;
43 module_param(debug, int, 0644);
44 MODULE_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 
51 static 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 
79 static 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 
95 static 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_finish	= saa7134_ts_buffer_finish,
100 	.buf_queue	= saa7134_vb2_buffer_queue,
101 	.wait_prepare	= vb2_ops_wait_prepare,
102 	.wait_finish	= vb2_ops_wait_finish,
103 	.start_streaming = start_streaming,
104 	.stop_streaming = stop_streaming,
105 };
106 
107 /* ------------------------------------------------------------------ */
108 
109 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
110 					struct v4l2_fmtdesc *f)
111 {
112 	if (f->index != 0)
113 		return -EINVAL;
114 
115 	strlcpy(f->description, "MPEG TS", sizeof(f->description));
116 	f->pixelformat = V4L2_PIX_FMT_MPEG;
117 	f->flags = V4L2_FMT_FLAG_COMPRESSED;
118 	return 0;
119 }
120 
121 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
122 				struct v4l2_format *f)
123 {
124 	struct saa7134_dev *dev = video_drvdata(file);
125 	struct v4l2_mbus_framefmt mbus_fmt;
126 
127 	saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
128 
129 	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
130 	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
131 	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
132 	f->fmt.pix.bytesperline = 0;
133 
134 	return 0;
135 }
136 
137 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
138 				struct v4l2_format *f)
139 {
140 	struct saa7134_dev *dev = video_drvdata(file);
141 	struct v4l2_mbus_framefmt mbus_fmt;
142 
143 	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
144 	saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
145 	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
146 
147 	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
148 	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
149 	f->fmt.pix.bytesperline = 0;
150 
151 	return 0;
152 }
153 
154 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
155 				struct v4l2_format *f)
156 {
157 	struct saa7134_dev *dev = video_drvdata(file);
158 	struct v4l2_mbus_framefmt mbus_fmt;
159 
160 	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
161 	saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt);
162 	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
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 
171 static 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 
182 static 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 
211 static 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 
219 static 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 		dprintk("no video signal\n");
226 	} else {
227 		dprintk("video signal acquired\n");
228 	}
229 }
230 
231 static void empress_signal_change(struct saa7134_dev *dev)
232 {
233 	schedule_work(&dev->empress_workqueue);
234 }
235 
236 static 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 
253 static 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 	dprintk("%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 		printk(KERN_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 	printk(KERN_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 
319 static int empress_fini(struct saa7134_dev *dev)
320 {
321 	dprintk("%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 
333 static 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 
340 static int __init empress_register(void)
341 {
342 	return saa7134_ts_register(&empress_ops);
343 }
344 
345 static void __exit empress_unregister(void)
346 {
347 	saa7134_ts_unregister(&empress_ops);
348 }
349 
350 module_init(empress_register);
351 module_exit(empress_unregister);
352