17eafaa5bf02d80d59b94acd65fce59757151951
[sfrench/cifs-2.6.git] / drivers / media / pci / saa7134 / 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
21 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
22 MODULE_LICENSE("GPL");
23
24 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
25
26 module_param_array(empress_nr, int, NULL, 0444);
27 MODULE_PARM_DESC(empress_nr,"ts device number");
28
29 /* ------------------------------------------------------------------ */
30
31 static 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
59 static 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
75 static 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
88 static 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         strscpy(f->description, "MPEG TS", sizeof(f->description));
95         f->pixelformat = V4L2_PIX_FMT_MPEG;
96         f->flags = V4L2_FMT_FLAG_COMPRESSED;
97         return 0;
98 }
99
100 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
101                                 struct v4l2_format *f)
102 {
103         struct saa7134_dev *dev = video_drvdata(file);
104         struct v4l2_subdev_format fmt = {
105                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
106         };
107         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
108
109         saa_call_all(dev, pad, get_fmt, NULL, &fmt);
110
111         v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
112         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
113         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
114         f->fmt.pix.bytesperline = 0;
115
116         return 0;
117 }
118
119 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
120                                 struct v4l2_format *f)
121 {
122         struct saa7134_dev *dev = video_drvdata(file);
123         struct v4l2_subdev_format format = {
124                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
125         };
126
127         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
128         saa_call_all(dev, pad, set_fmt, NULL, &format);
129         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
130
131         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
132         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
133         f->fmt.pix.bytesperline = 0;
134
135         return 0;
136 }
137
138 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
139                                 struct v4l2_format *f)
140 {
141         struct saa7134_dev *dev = video_drvdata(file);
142         struct v4l2_subdev_pad_config pad_cfg;
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_cfg, &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
158 static 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
169 static 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
199 static 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
207 static 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
219 static void empress_signal_change(struct saa7134_dev *dev)
220 {
221         schedule_work(&dev->empress_workqueue);
222 }
223
224 static 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
241 static 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                 return err;
289         dev->empress_dev->queue = q;
290
291         video_set_drvdata(dev->empress_dev, dev);
292         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
293                                     empress_nr[dev->nr]);
294         if (err < 0) {
295                 pr_info("%s: can't register video device\n",
296                        dev->name);
297                 video_device_release(dev->empress_dev);
298                 dev->empress_dev = NULL;
299                 return err;
300         }
301         pr_info("%s: registered device %s [mpeg]\n",
302                dev->name, video_device_node_name(dev->empress_dev));
303
304         empress_signal_update(&dev->empress_workqueue);
305         return 0;
306 }
307
308 static int empress_fini(struct saa7134_dev *dev)
309 {
310         pr_debug("%s: %s\n", dev->name, __func__);
311
312         if (NULL == dev->empress_dev)
313                 return 0;
314         flush_work(&dev->empress_workqueue);
315         video_unregister_device(dev->empress_dev);
316         vb2_queue_release(&dev->empress_vbq);
317         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
318         dev->empress_dev = NULL;
319         return 0;
320 }
321
322 static struct saa7134_mpeg_ops empress_ops = {
323         .type          = SAA7134_MPEG_EMPRESS,
324         .init          = empress_init,
325         .fini          = empress_fini,
326         .signal_change = empress_signal_change,
327 };
328
329 static int __init empress_register(void)
330 {
331         return saa7134_ts_register(&empress_ops);
332 }
333
334 static void __exit empress_unregister(void)
335 {
336         saa7134_ts_unregister(&empress_ops);
337 }
338
339 module_init(empress_register);
340 module_exit(empress_unregister);