saa7134-empress.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *
  4 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
  5 */
  6
  7#include "saa7134.h"
  8#include "saa7134-reg.h"
  9
 10#include <linux/init.h>
 11#include <linux/list.h>
 12#include <linux/module.h>
 13#include <linux/kernel.h>
 14#include <linux/delay.h>
 15
 16#include <media/v4l2-common.h>
 17#include <media/v4l2-event.h>
 18
 19/* ------------------------------------------------------------------ */
 20
 21MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
 22MODULE_DESCRIPTION("Philips SAA7134 empress support");
 23MODULE_LICENSE("GPL");
 24
 25static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
 26
 27module_param_array(empress_nr, int, NULL, 0444);
 28MODULE_PARM_DESC(empress_nr,"ts device number");
 29
 30/* ------------------------------------------------------------------ */
 31
 32static int start_streaming(struct vb2_queue *vq, unsigned int count)
 33{
 34	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
 35	struct saa7134_dev *dev = dmaq->dev;
 36	u32 leading_null_bytes = 0;
 37	int err;
 38
 39	err = saa7134_ts_start_streaming(vq, count);
 40	if (err)
 41		return err;
 42
 43	/* If more cards start to need this, then this
 44	   should probably be added to the card definitions. */
 45	switch (dev->board) {
 46	case SAA7134_BOARD_BEHOLD_M6:
 47	case SAA7134_BOARD_BEHOLD_M63:
 48	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
 49		leading_null_bytes = 1;
 50		break;
 51	}
 52	saa_call_all(dev, core, init, leading_null_bytes);
 53	/* Unmute audio */
 54	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 55			saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 56	dev->empress_started = 1;
 57	return 0;
 58}
 59
 60static void stop_streaming(struct vb2_queue *vq)
 61{
 62	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
 63	struct saa7134_dev *dev = dmaq->dev;
 64
 65	saa7134_ts_stop_streaming(vq);
 66	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
 67	msleep(20);
 68	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
 69	msleep(100);
 70	/* Mute audio */
 71	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 72			saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 73	dev->empress_started = 0;
 74}
 75
 76static const struct vb2_ops saa7134_empress_qops = {
 77	.queue_setup	= saa7134_ts_queue_setup,
 78	.buf_init	= saa7134_ts_buffer_init,
 79	.buf_prepare	= saa7134_ts_buffer_prepare,
 80	.buf_queue	= saa7134_vb2_buffer_queue,
 81	.start_streaming = start_streaming,
 82	.stop_streaming = stop_streaming,
 83};
 84
 85/* ------------------------------------------------------------------ */
 86
 87static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 88					struct v4l2_fmtdesc *f)
 89{
 90	if (f->index != 0)
 91		return -EINVAL;
 92
 93	f->pixelformat = V4L2_PIX_FMT_MPEG;
 94	return 0;
 95}
 96
 97static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 98				struct v4l2_format *f)
 99{
100	struct saa7134_dev *dev = video_drvdata(file);
101	struct v4l2_subdev_format fmt = {
102		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
103	};
104	struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
105
106	saa_call_all(dev, pad, get_fmt, NULL, &fmt);
107
108	v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
109	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
110	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
111	f->fmt.pix.bytesperline = 0;
112
113	return 0;
114}
115
116static int empress_s_fmt_vid_cap(struct file *file, void *priv,
117				struct v4l2_format *f)
118{
119	struct saa7134_dev *dev = video_drvdata(file);
120	struct v4l2_subdev_format format = {
121		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
122	};
123
124	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
125	saa_call_all(dev, pad, set_fmt, NULL, &format);
126	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
127
128	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
129	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
130	f->fmt.pix.bytesperline = 0;
131
132	return 0;
133}
134
135static int empress_try_fmt_vid_cap(struct file *file, void *priv,
136				struct v4l2_format *f)
137{
138	struct saa7134_dev *dev = video_drvdata(file);
139	struct v4l2_subdev_pad_config pad_cfg;
140	struct v4l2_subdev_state pad_state = {
141		.pads = &pad_cfg,
142	};
143	struct v4l2_subdev_format format = {
144		.which = V4L2_SUBDEV_FORMAT_TRY,
145	};
146
147	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
148	saa_call_all(dev, pad, set_fmt, &pad_state, &format);
149	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
150
151	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
152	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
153	f->fmt.pix.bytesperline = 0;
154
155	return 0;
156}
157
158static const struct v4l2_file_operations ts_fops =
159{
160	.owner	  = THIS_MODULE,
161	.open	  = v4l2_fh_open,
162	.release  = vb2_fop_release,
163	.read	  = vb2_fop_read,
164	.poll	  = vb2_fop_poll,
165	.mmap	  = vb2_fop_mmap,
166	.unlocked_ioctl = video_ioctl2,
167};
168
169static const struct v4l2_ioctl_ops ts_ioctl_ops = {
170	.vidioc_querycap		= saa7134_querycap,
171	.vidioc_enum_fmt_vid_cap	= empress_enum_fmt_vid_cap,
172	.vidioc_try_fmt_vid_cap		= empress_try_fmt_vid_cap,
173	.vidioc_s_fmt_vid_cap		= empress_s_fmt_vid_cap,
174	.vidioc_g_fmt_vid_cap		= empress_g_fmt_vid_cap,
175	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
176	.vidioc_querybuf		= vb2_ioctl_querybuf,
177	.vidioc_qbuf			= vb2_ioctl_qbuf,
178	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
179	.vidioc_expbuf			= vb2_ioctl_expbuf,
180	.vidioc_streamon		= vb2_ioctl_streamon,
181	.vidioc_streamoff		= vb2_ioctl_streamoff,
182	.vidioc_g_frequency		= saa7134_g_frequency,
183	.vidioc_s_frequency		= saa7134_s_frequency,
184	.vidioc_g_tuner			= saa7134_g_tuner,
185	.vidioc_s_tuner			= saa7134_s_tuner,
186	.vidioc_enum_input		= saa7134_enum_input,
187	.vidioc_g_input			= saa7134_g_input,
188	.vidioc_s_input			= saa7134_s_input,
189	.vidioc_s_std			= saa7134_s_std,
190	.vidioc_g_std			= saa7134_g_std,
191	.vidioc_querystd		= saa7134_querystd,
192	.vidioc_log_status		= v4l2_ctrl_log_status,
193	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
194	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
195};
196
197/* ----------------------------------------------------------- */
198
199static const struct video_device saa7134_empress_template = {
200	.name          = "saa7134-empress",
201	.fops          = &ts_fops,
202	.ioctl_ops     = &ts_ioctl_ops,
203
204	.tvnorms			= SAA7134_NORMS,
205};
206
207static void empress_signal_update(struct work_struct *work)
208{
209	struct saa7134_dev* dev =
210		container_of(work, struct saa7134_dev, empress_workqueue);
211
212	if (dev->nosignal) {
213		pr_debug("no video signal\n");
214	} else {
215		pr_debug("video signal acquired\n");
216	}
217}
218
219static void empress_signal_change(struct saa7134_dev *dev)
220{
221	schedule_work(&dev->empress_workqueue);
222}
223
224static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
225{
226	switch (ctrl->id) {
227	case V4L2_CID_BRIGHTNESS:
228	case V4L2_CID_HUE:
229	case V4L2_CID_CONTRAST:
230	case V4L2_CID_SATURATION:
231	case V4L2_CID_AUDIO_MUTE:
232	case V4L2_CID_AUDIO_VOLUME:
233	case V4L2_CID_PRIVATE_INVERT:
234	case V4L2_CID_PRIVATE_AUTOMUTE:
235		return true;
236	default:
237		return false;
238	}
239}
240
241static int empress_init(struct saa7134_dev *dev)
242{
243	struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
244	struct vb2_queue *q;
245	int err;
246
247	pr_debug("%s: %s\n", dev->name, __func__);
248	dev->empress_dev = video_device_alloc();
249	if (NULL == dev->empress_dev)
250		return -ENOMEM;
251	*(dev->empress_dev) = saa7134_empress_template;
252	dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
253	dev->empress_dev->release = video_device_release;
254	dev->empress_dev->lock = &dev->lock;
255	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
256		 "%s empress (%s)", dev->name,
257		 saa7134_boards[dev->board].name);
258	v4l2_ctrl_handler_init(hdl, 21);
259	v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
260	if (dev->empress_sd)
261		v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
262	if (hdl->error) {
263		video_device_release(dev->empress_dev);
264		return hdl->error;
265	}
266	dev->empress_dev->ctrl_handler = hdl;
267
268	INIT_WORK(&dev->empress_workqueue, empress_signal_update);
269
270	q = &dev->empress_vbq;
271	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
272	/*
273	 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
274	 * transfers that do not start at the beginning of a page. A USERPTR
275	 * can start anywhere in a page, so USERPTR support is a no-go.
276	 */
277	q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
278	q->drv_priv = &dev->ts_q;
279	q->ops = &saa7134_empress_qops;
280	q->gfp_flags = GFP_DMA32;
281	q->mem_ops = &vb2_dma_sg_memops;
282	q->buf_struct_size = sizeof(struct saa7134_buf);
283	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
284	q->lock = &dev->lock;
285	q->dev = &dev->pci->dev;
286	err = vb2_queue_init(q);
287	if (err) {
288		video_device_release(dev->empress_dev);
289		dev->empress_dev = NULL;
290		return err;
291	}
292	dev->empress_dev->queue = q;
293	dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
294					V4L2_CAP_VIDEO_CAPTURE;
295	if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
296		dev->empress_dev->device_caps |= V4L2_CAP_TUNER;
297
298	video_set_drvdata(dev->empress_dev, dev);
299	err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO,
300				    empress_nr[dev->nr]);
301	if (err < 0) {
302		pr_info("%s: can't register video device\n",
303		       dev->name);
304		video_device_release(dev->empress_dev);
305		dev->empress_dev = NULL;
306		return err;
307	}
308	pr_info("%s: registered device %s [mpeg]\n",
309	       dev->name, video_device_node_name(dev->empress_dev));
310
311	empress_signal_update(&dev->empress_workqueue);
312	return 0;
313}
314
315static int empress_fini(struct saa7134_dev *dev)
316{
317	pr_debug("%s: %s\n", dev->name, __func__);
318
319	if (NULL == dev->empress_dev)
320		return 0;
321	flush_work(&dev->empress_workqueue);
322	vb2_video_unregister_device(dev->empress_dev);
323	v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
324	dev->empress_dev = NULL;
325	return 0;
326}
327
328static struct saa7134_mpeg_ops empress_ops = {
329	.type          = SAA7134_MPEG_EMPRESS,
330	.init          = empress_init,
331	.fini          = empress_fini,
332	.signal_change = empress_signal_change,
333};
334
335static int __init empress_register(void)
336{
337	return saa7134_ts_register(&empress_ops);
338}
339
340static void __exit empress_unregister(void)
341{
342	saa7134_ts_unregister(&empress_ops);
343}
344
345module_init(empress_register);
346module_exit(empress_unregister);