Linux 5.4-rc3
[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         f->pixelformat = V4L2_PIX_FMT_MPEG;
95         return 0;
96 }
97
98 static 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
117 static 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
136 static 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_format format = {
142                 .which = V4L2_SUBDEV_FORMAT_TRY,
143         };
144
145         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
146         saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
147         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
148
149         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
150         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
151         f->fmt.pix.bytesperline = 0;
152
153         return 0;
154 }
155
156 static const struct v4l2_file_operations ts_fops =
157 {
158         .owner    = THIS_MODULE,
159         .open     = v4l2_fh_open,
160         .release  = vb2_fop_release,
161         .read     = vb2_fop_read,
162         .poll     = vb2_fop_poll,
163         .mmap     = vb2_fop_mmap,
164         .unlocked_ioctl = video_ioctl2,
165 };
166
167 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
168         .vidioc_querycap                = saa7134_querycap,
169         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
170         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
171         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
172         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
173         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
174         .vidioc_querybuf                = vb2_ioctl_querybuf,
175         .vidioc_qbuf                    = vb2_ioctl_qbuf,
176         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
177         .vidioc_expbuf                  = vb2_ioctl_expbuf,
178         .vidioc_streamon                = vb2_ioctl_streamon,
179         .vidioc_streamoff               = vb2_ioctl_streamoff,
180         .vidioc_g_frequency             = saa7134_g_frequency,
181         .vidioc_s_frequency             = saa7134_s_frequency,
182         .vidioc_g_tuner                 = saa7134_g_tuner,
183         .vidioc_s_tuner                 = saa7134_s_tuner,
184         .vidioc_enum_input              = saa7134_enum_input,
185         .vidioc_g_input                 = saa7134_g_input,
186         .vidioc_s_input                 = saa7134_s_input,
187         .vidioc_s_std                   = saa7134_s_std,
188         .vidioc_g_std                   = saa7134_g_std,
189         .vidioc_querystd                = saa7134_querystd,
190         .vidioc_log_status              = v4l2_ctrl_log_status,
191         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
192         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
193 };
194
195 /* ----------------------------------------------------------- */
196
197 static const struct video_device saa7134_empress_template = {
198         .name          = "saa7134-empress",
199         .fops          = &ts_fops,
200         .ioctl_ops     = &ts_ioctl_ops,
201
202         .tvnorms                        = SAA7134_NORMS,
203 };
204
205 static void empress_signal_update(struct work_struct *work)
206 {
207         struct saa7134_dev* dev =
208                 container_of(work, struct saa7134_dev, empress_workqueue);
209
210         if (dev->nosignal) {
211                 pr_debug("no video signal\n");
212         } else {
213                 pr_debug("video signal acquired\n");
214         }
215 }
216
217 static void empress_signal_change(struct saa7134_dev *dev)
218 {
219         schedule_work(&dev->empress_workqueue);
220 }
221
222 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
223 {
224         switch (ctrl->id) {
225         case V4L2_CID_BRIGHTNESS:
226         case V4L2_CID_HUE:
227         case V4L2_CID_CONTRAST:
228         case V4L2_CID_SATURATION:
229         case V4L2_CID_AUDIO_MUTE:
230         case V4L2_CID_AUDIO_VOLUME:
231         case V4L2_CID_PRIVATE_INVERT:
232         case V4L2_CID_PRIVATE_AUTOMUTE:
233                 return true;
234         default:
235                 return false;
236         }
237 }
238
239 static int empress_init(struct saa7134_dev *dev)
240 {
241         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
242         struct vb2_queue *q;
243         int err;
244
245         pr_debug("%s: %s\n", dev->name, __func__);
246         dev->empress_dev = video_device_alloc();
247         if (NULL == dev->empress_dev)
248                 return -ENOMEM;
249         *(dev->empress_dev) = saa7134_empress_template;
250         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
251         dev->empress_dev->release = video_device_release;
252         dev->empress_dev->lock = &dev->lock;
253         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
254                  "%s empress (%s)", dev->name,
255                  saa7134_boards[dev->board].name);
256         v4l2_ctrl_handler_init(hdl, 21);
257         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
258         if (dev->empress_sd)
259                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
260         if (hdl->error) {
261                 video_device_release(dev->empress_dev);
262                 return hdl->error;
263         }
264         dev->empress_dev->ctrl_handler = hdl;
265
266         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
267
268         q = &dev->empress_vbq;
269         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
270         /*
271          * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
272          * transfers that do not start at the beginning of a page. A USERPTR
273          * can start anywhere in a page, so USERPTR support is a no-go.
274          */
275         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
276         q->drv_priv = &dev->ts_q;
277         q->ops = &saa7134_empress_qops;
278         q->gfp_flags = GFP_DMA32;
279         q->mem_ops = &vb2_dma_sg_memops;
280         q->buf_struct_size = sizeof(struct saa7134_buf);
281         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
282         q->lock = &dev->lock;
283         q->dev = &dev->pci->dev;
284         err = vb2_queue_init(q);
285         if (err)
286                 return err;
287         dev->empress_dev->queue = q;
288         dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
289                                         V4L2_CAP_VIDEO_CAPTURE;
290         if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
291                 dev->empress_dev->device_caps |= V4L2_CAP_TUNER;
292
293         video_set_drvdata(dev->empress_dev, dev);
294         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
295                                     empress_nr[dev->nr]);
296         if (err < 0) {
297                 pr_info("%s: can't register video device\n",
298                        dev->name);
299                 video_device_release(dev->empress_dev);
300                 dev->empress_dev = NULL;
301                 return err;
302         }
303         pr_info("%s: registered device %s [mpeg]\n",
304                dev->name, video_device_node_name(dev->empress_dev));
305
306         empress_signal_update(&dev->empress_workqueue);
307         return 0;
308 }
309
310 static int empress_fini(struct saa7134_dev *dev)
311 {
312         pr_debug("%s: %s\n", dev->name, __func__);
313
314         if (NULL == dev->empress_dev)
315                 return 0;
316         flush_work(&dev->empress_workqueue);
317         video_unregister_device(dev->empress_dev);
318         vb2_queue_release(&dev->empress_vbq);
319         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
320         dev->empress_dev = NULL;
321         return 0;
322 }
323
324 static struct saa7134_mpeg_ops empress_ops = {
325         .type          = SAA7134_MPEG_EMPRESS,
326         .init          = empress_init,
327         .fini          = empress_fini,
328         .signal_change = empress_signal_change,
329 };
330
331 static int __init empress_register(void)
332 {
333         return saa7134_ts_register(&empress_ops);
334 }
335
336 static void __exit empress_unregister(void)
337 {
338         saa7134_ts_unregister(&empress_ops);
339 }
340
341 module_init(empress_register);
342 module_exit(empress_unregister);