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_LICENSE("GPL");
23
24static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
25
26module_param_array(empress_nr, int, NULL, 0444);
27MODULE_PARM_DESC(empress_nr,"ts device number");
28
29/* ------------------------------------------------------------------ */
30
31static int start_streaming(struct vb2_queue *vq, unsigned int count)
32{
33	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
34	struct saa7134_dev *dev = dmaq->dev;
35	u32 leading_null_bytes = 0;
36	int err;
37
38	err = saa7134_ts_start_streaming(vq, count);
39	if (err)
40		return err;
41
42	/* If more cards start to need this, then this
43	   should probably be added to the card definitions. */
44	switch (dev->board) {
45	case SAA7134_BOARD_BEHOLD_M6:
46	case SAA7134_BOARD_BEHOLD_M63:
47	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
48		leading_null_bytes = 1;
49		break;
50	}
51	saa_call_all(dev, core, init, leading_null_bytes);
52	/* Unmute audio */
53	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
54			saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
55	dev->empress_started = 1;
56	return 0;
57}
58
59static void stop_streaming(struct vb2_queue *vq)
60{
61	struct saa7134_dmaqueue *dmaq = vq->drv_priv;
62	struct saa7134_dev *dev = dmaq->dev;
63
64	saa7134_ts_stop_streaming(vq);
65	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
66	msleep(20);
67	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
68	msleep(100);
69	/* Mute audio */
70	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
71			saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
72	dev->empress_started = 0;
73}
74
75static const struct vb2_ops saa7134_empress_qops = {
76	.queue_setup	= saa7134_ts_queue_setup,
77	.buf_init	= saa7134_ts_buffer_init,
78	.buf_prepare	= saa7134_ts_buffer_prepare,
79	.buf_queue	= saa7134_vb2_buffer_queue,
80	.wait_prepare	= vb2_ops_wait_prepare,
81	.wait_finish	= vb2_ops_wait_finish,
82	.start_streaming = start_streaming,
83	.stop_streaming = stop_streaming,
84};
85
86/* ------------------------------------------------------------------ */
87
88static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
89					struct v4l2_fmtdesc *f)
90{
91	if (f->index != 0)
92		return -EINVAL;
93
94	f->pixelformat = V4L2_PIX_FMT_MPEG;
95	return 0;
96}
97
98static int empress_g_fmt_vid_cap(struct file *file, void *priv,
99				struct v4l2_format *f)
100{
101	struct saa7134_dev *dev = video_drvdata(file);
102	struct v4l2_subdev_format fmt = {
103		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
104	};
105	struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
106
107	saa_call_all(dev, pad, get_fmt, NULL, &fmt);
108
109	v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
110	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
111	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
112	f->fmt.pix.bytesperline = 0;
113
114	return 0;
115}
116
117static int empress_s_fmt_vid_cap(struct file *file, void *priv,
118				struct v4l2_format *f)
119{
120	struct saa7134_dev *dev = video_drvdata(file);
121	struct v4l2_subdev_format format = {
122		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
123	};
124
125	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
126	saa_call_all(dev, pad, set_fmt, NULL, &format);
127	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
128
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_try_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_subdev_pad_config pad_cfg;
141	struct v4l2_subdev_state pad_state = {
142		.pads = &pad_cfg,
143	};
144	struct v4l2_subdev_format format = {
145		.which = V4L2_SUBDEV_FORMAT_TRY,
146	};
147
148	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
149	saa_call_all(dev, pad, set_fmt, &pad_state, &format);
150	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
151
152	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
153	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
154	f->fmt.pix.bytesperline = 0;
155
156	return 0;
157}
158
159static const struct v4l2_file_operations ts_fops =
160{
161	.owner	  = THIS_MODULE,
162	.open	  = v4l2_fh_open,
163	.release  = vb2_fop_release,
164	.read	  = vb2_fop_read,
165	.poll	  = vb2_fop_poll,
166	.mmap	  = vb2_fop_mmap,
167	.unlocked_ioctl = video_ioctl2,
168};
169
170static const struct v4l2_ioctl_ops ts_ioctl_ops = {
171	.vidioc_querycap		= saa7134_querycap,
172	.vidioc_enum_fmt_vid_cap	= empress_enum_fmt_vid_cap,
173	.vidioc_try_fmt_vid_cap		= empress_try_fmt_vid_cap,
174	.vidioc_s_fmt_vid_cap		= empress_s_fmt_vid_cap,
175	.vidioc_g_fmt_vid_cap		= empress_g_fmt_vid_cap,
176	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
177	.vidioc_querybuf		= vb2_ioctl_querybuf,
178	.vidioc_qbuf			= vb2_ioctl_qbuf,
179	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
180	.vidioc_expbuf			= vb2_ioctl_expbuf,
181	.vidioc_streamon		= vb2_ioctl_streamon,
182	.vidioc_streamoff		= vb2_ioctl_streamoff,
183	.vidioc_g_frequency		= saa7134_g_frequency,
184	.vidioc_s_frequency		= saa7134_s_frequency,
185	.vidioc_g_tuner			= saa7134_g_tuner,
186	.vidioc_s_tuner			= saa7134_s_tuner,
187	.vidioc_enum_input		= saa7134_enum_input,
188	.vidioc_g_input			= saa7134_g_input,
189	.vidioc_s_input			= saa7134_s_input,
190	.vidioc_s_std			= saa7134_s_std,
191	.vidioc_g_std			= saa7134_g_std,
192	.vidioc_querystd		= saa7134_querystd,
193	.vidioc_log_status		= v4l2_ctrl_log_status,
194	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
195	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
196};
197
198/* ----------------------------------------------------------- */
199
200static const struct video_device saa7134_empress_template = {
201	.name          = "saa7134-empress",
202	.fops          = &ts_fops,
203	.ioctl_ops     = &ts_ioctl_ops,
204
205	.tvnorms			= SAA7134_NORMS,
206};
207
208static void empress_signal_update(struct work_struct *work)
209{
210	struct saa7134_dev* dev =
211		container_of(work, struct saa7134_dev, empress_workqueue);
212
213	if (dev->nosignal) {
214		pr_debug("no video signal\n");
215	} else {
216		pr_debug("video signal acquired\n");
217	}
218}
219
220static void empress_signal_change(struct saa7134_dev *dev)
221{
222	schedule_work(&dev->empress_workqueue);
223}
224
225static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
226{
227	switch (ctrl->id) {
228	case V4L2_CID_BRIGHTNESS:
229	case V4L2_CID_HUE:
230	case V4L2_CID_CONTRAST:
231	case V4L2_CID_SATURATION:
232	case V4L2_CID_AUDIO_MUTE:
233	case V4L2_CID_AUDIO_VOLUME:
234	case V4L2_CID_PRIVATE_INVERT:
235	case V4L2_CID_PRIVATE_AUTOMUTE:
236		return true;
237	default:
238		return false;
239	}
240}
241
242static int empress_init(struct saa7134_dev *dev)
243{
244	struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
245	struct vb2_queue *q;
246	int err;
247
248	pr_debug("%s: %s\n", dev->name, __func__);
249	dev->empress_dev = video_device_alloc();
250	if (NULL == dev->empress_dev)
251		return -ENOMEM;
252	*(dev->empress_dev) = saa7134_empress_template;
253	dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
254	dev->empress_dev->release = video_device_release;
255	dev->empress_dev->lock = &dev->lock;
256	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
257		 "%s empress (%s)", dev->name,
258		 saa7134_boards[dev->board].name);
259	v4l2_ctrl_handler_init(hdl, 21);
260	v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
261	if (dev->empress_sd)
262		v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
263	if (hdl->error) {
264		video_device_release(dev->empress_dev);
265		return hdl->error;
266	}
267	dev->empress_dev->ctrl_handler = hdl;
268
269	INIT_WORK(&dev->empress_workqueue, empress_signal_update);
270
271	q = &dev->empress_vbq;
272	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
273	/*
274	 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
275	 * transfers that do not start at the beginning of a page. A USERPTR
276	 * can start anywhere in a page, so USERPTR support is a no-go.
277	 */
278	q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
279	q->drv_priv = &dev->ts_q;
280	q->ops = &saa7134_empress_qops;
281	q->gfp_flags = GFP_DMA32;
282	q->mem_ops = &vb2_dma_sg_memops;
283	q->buf_struct_size = sizeof(struct saa7134_buf);
284	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
285	q->lock = &dev->lock;
286	q->dev = &dev->pci->dev;
287	err = vb2_queue_init(q);
288	if (err) {
289		video_device_release(dev->empress_dev);
290		dev->empress_dev = NULL;
291		return err;
292	}
293	dev->empress_dev->queue = q;
294	dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
295					V4L2_CAP_VIDEO_CAPTURE;
296	if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
297		dev->empress_dev->device_caps |= V4L2_CAP_TUNER;
298
299	video_set_drvdata(dev->empress_dev, dev);
300	err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO,
301				    empress_nr[dev->nr]);
302	if (err < 0) {
303		pr_info("%s: can't register video device\n",
304		       dev->name);
305		video_device_release(dev->empress_dev);
306		dev->empress_dev = NULL;
307		return err;
308	}
309	pr_info("%s: registered device %s [mpeg]\n",
310	       dev->name, video_device_node_name(dev->empress_dev));
311
312	empress_signal_update(&dev->empress_workqueue);
313	return 0;
314}
315
316static int empress_fini(struct saa7134_dev *dev)
317{
318	pr_debug("%s: %s\n", dev->name, __func__);
319
320	if (NULL == dev->empress_dev)
321		return 0;
322	flush_work(&dev->empress_workqueue);
323	vb2_video_unregister_device(dev->empress_dev);
324	v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
325	dev->empress_dev = NULL;
326	return 0;
327}
328
329static struct saa7134_mpeg_ops empress_ops = {
330	.type          = SAA7134_MPEG_EMPRESS,
331	.init          = empress_init,
332	.fini          = empress_fini,
333	.signal_change = empress_signal_change,
334};
335
336static int __init empress_register(void)
337{
338	return saa7134_ts_register(&empress_ops);
339}
340
341static void __exit empress_unregister(void)
342{
343	saa7134_ts_unregister(&empress_ops);
344}
345
346module_init(empress_register);
347module_exit(empress_unregister);
348