Merge tag 'm68k-for-v4.20-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / drivers / media / pci / saa7134 / saa7134-empress.c
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
16 #include "saa7134.h"
17 #include "saa7134-reg.h"
18
19 #include <linux/init.h>
20 #include <linux/list.h>
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/delay.h>
24
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-event.h>
27
28 /* ------------------------------------------------------------------ */
29
30 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
31 MODULE_LICENSE("GPL");
32
33 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
34
35 module_param_array(empress_nr, int, NULL, 0444);
36 MODULE_PARM_DESC(empress_nr,"ts device number");
37
38 /* ------------------------------------------------------------------ */
39
40 static int start_streaming(struct vb2_queue *vq, unsigned int count)
41 {
42         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
43         struct saa7134_dev *dev = dmaq->dev;
44         u32 leading_null_bytes = 0;
45         int err;
46
47         err = saa7134_ts_start_streaming(vq, count);
48         if (err)
49                 return err;
50
51         /* If more cards start to need this, then this
52            should probably be added to the card definitions. */
53         switch (dev->board) {
54         case SAA7134_BOARD_BEHOLD_M6:
55         case SAA7134_BOARD_BEHOLD_M63:
56         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
57                 leading_null_bytes = 1;
58                 break;
59         }
60         saa_call_all(dev, core, init, leading_null_bytes);
61         /* Unmute audio */
62         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
63                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
64         dev->empress_started = 1;
65         return 0;
66 }
67
68 static void stop_streaming(struct vb2_queue *vq)
69 {
70         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
71         struct saa7134_dev *dev = dmaq->dev;
72
73         saa7134_ts_stop_streaming(vq);
74         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
75         msleep(20);
76         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
77         msleep(100);
78         /* Mute audio */
79         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
80                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
81         dev->empress_started = 0;
82 }
83
84 static const struct vb2_ops saa7134_empress_qops = {
85         .queue_setup    = saa7134_ts_queue_setup,
86         .buf_init       = saa7134_ts_buffer_init,
87         .buf_prepare    = saa7134_ts_buffer_prepare,
88         .buf_queue      = saa7134_vb2_buffer_queue,
89         .wait_prepare   = vb2_ops_wait_prepare,
90         .wait_finish    = vb2_ops_wait_finish,
91         .start_streaming = start_streaming,
92         .stop_streaming = stop_streaming,
93 };
94
95 /* ------------------------------------------------------------------ */
96
97 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
98                                         struct v4l2_fmtdesc *f)
99 {
100         if (f->index != 0)
101                 return -EINVAL;
102
103         strscpy(f->description, "MPEG TS", sizeof(f->description));
104         f->pixelformat = V4L2_PIX_FMT_MPEG;
105         f->flags = V4L2_FMT_FLAG_COMPRESSED;
106         return 0;
107 }
108
109 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
110                                 struct v4l2_format *f)
111 {
112         struct saa7134_dev *dev = video_drvdata(file);
113         struct v4l2_subdev_format fmt = {
114                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
115         };
116         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
117
118         saa_call_all(dev, pad, get_fmt, NULL, &fmt);
119
120         v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
121         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
122         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
123         f->fmt.pix.bytesperline = 0;
124
125         return 0;
126 }
127
128 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
129                                 struct v4l2_format *f)
130 {
131         struct saa7134_dev *dev = video_drvdata(file);
132         struct v4l2_subdev_format format = {
133                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
134         };
135
136         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
137         saa_call_all(dev, pad, set_fmt, NULL, &format);
138         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
139
140         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
141         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
142         f->fmt.pix.bytesperline = 0;
143
144         return 0;
145 }
146
147 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
148                                 struct v4l2_format *f)
149 {
150         struct saa7134_dev *dev = video_drvdata(file);
151         struct v4l2_subdev_pad_config pad_cfg;
152         struct v4l2_subdev_format format = {
153                 .which = V4L2_SUBDEV_FORMAT_TRY,
154         };
155
156         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
157         saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
158         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
159
160         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
161         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
162         f->fmt.pix.bytesperline = 0;
163
164         return 0;
165 }
166
167 static const struct v4l2_file_operations ts_fops =
168 {
169         .owner    = THIS_MODULE,
170         .open     = v4l2_fh_open,
171         .release  = vb2_fop_release,
172         .read     = vb2_fop_read,
173         .poll     = vb2_fop_poll,
174         .mmap     = vb2_fop_mmap,
175         .unlocked_ioctl = video_ioctl2,
176 };
177
178 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
179         .vidioc_querycap                = saa7134_querycap,
180         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
181         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
182         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
183         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
184         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
185         .vidioc_querybuf                = vb2_ioctl_querybuf,
186         .vidioc_qbuf                    = vb2_ioctl_qbuf,
187         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
188         .vidioc_expbuf                  = vb2_ioctl_expbuf,
189         .vidioc_streamon                = vb2_ioctl_streamon,
190         .vidioc_streamoff               = vb2_ioctl_streamoff,
191         .vidioc_g_frequency             = saa7134_g_frequency,
192         .vidioc_s_frequency             = saa7134_s_frequency,
193         .vidioc_g_tuner                 = saa7134_g_tuner,
194         .vidioc_s_tuner                 = saa7134_s_tuner,
195         .vidioc_enum_input              = saa7134_enum_input,
196         .vidioc_g_input                 = saa7134_g_input,
197         .vidioc_s_input                 = saa7134_s_input,
198         .vidioc_s_std                   = saa7134_s_std,
199         .vidioc_g_std                   = saa7134_g_std,
200         .vidioc_querystd                = saa7134_querystd,
201         .vidioc_log_status              = v4l2_ctrl_log_status,
202         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
203         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
204 };
205
206 /* ----------------------------------------------------------- */
207
208 static const struct video_device saa7134_empress_template = {
209         .name          = "saa7134-empress",
210         .fops          = &ts_fops,
211         .ioctl_ops     = &ts_ioctl_ops,
212
213         .tvnorms                        = SAA7134_NORMS,
214 };
215
216 static void empress_signal_update(struct work_struct *work)
217 {
218         struct saa7134_dev* dev =
219                 container_of(work, struct saa7134_dev, empress_workqueue);
220
221         if (dev->nosignal) {
222                 pr_debug("no video signal\n");
223         } else {
224                 pr_debug("video signal acquired\n");
225         }
226 }
227
228 static void empress_signal_change(struct saa7134_dev *dev)
229 {
230         schedule_work(&dev->empress_workqueue);
231 }
232
233 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
234 {
235         switch (ctrl->id) {
236         case V4L2_CID_BRIGHTNESS:
237         case V4L2_CID_HUE:
238         case V4L2_CID_CONTRAST:
239         case V4L2_CID_SATURATION:
240         case V4L2_CID_AUDIO_MUTE:
241         case V4L2_CID_AUDIO_VOLUME:
242         case V4L2_CID_PRIVATE_INVERT:
243         case V4L2_CID_PRIVATE_AUTOMUTE:
244                 return true;
245         default:
246                 return false;
247         }
248 }
249
250 static int empress_init(struct saa7134_dev *dev)
251 {
252         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
253         struct vb2_queue *q;
254         int err;
255
256         pr_debug("%s: %s\n", dev->name, __func__);
257         dev->empress_dev = video_device_alloc();
258         if (NULL == dev->empress_dev)
259                 return -ENOMEM;
260         *(dev->empress_dev) = saa7134_empress_template;
261         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
262         dev->empress_dev->release = video_device_release;
263         dev->empress_dev->lock = &dev->lock;
264         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
265                  "%s empress (%s)", dev->name,
266                  saa7134_boards[dev->board].name);
267         v4l2_ctrl_handler_init(hdl, 21);
268         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
269         if (dev->empress_sd)
270                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
271         if (hdl->error) {
272                 video_device_release(dev->empress_dev);
273                 return hdl->error;
274         }
275         dev->empress_dev->ctrl_handler = hdl;
276
277         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
278
279         q = &dev->empress_vbq;
280         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
281         /*
282          * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
283          * transfers that do not start at the beginning of a page. A USERPTR
284          * can start anywhere in a page, so USERPTR support is a no-go.
285          */
286         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
287         q->drv_priv = &dev->ts_q;
288         q->ops = &saa7134_empress_qops;
289         q->gfp_flags = GFP_DMA32;
290         q->mem_ops = &vb2_dma_sg_memops;
291         q->buf_struct_size = sizeof(struct saa7134_buf);
292         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
293         q->lock = &dev->lock;
294         q->dev = &dev->pci->dev;
295         err = vb2_queue_init(q);
296         if (err)
297                 return err;
298         dev->empress_dev->queue = q;
299
300         video_set_drvdata(dev->empress_dev, dev);
301         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
302                                     empress_nr[dev->nr]);
303         if (err < 0) {
304                 pr_info("%s: can't register video device\n",
305                        dev->name);
306                 video_device_release(dev->empress_dev);
307                 dev->empress_dev = NULL;
308                 return err;
309         }
310         pr_info("%s: registered device %s [mpeg]\n",
311                dev->name, video_device_node_name(dev->empress_dev));
312
313         empress_signal_update(&dev->empress_workqueue);
314         return 0;
315 }
316
317 static int empress_fini(struct saa7134_dev *dev)
318 {
319         pr_debug("%s: %s\n", dev->name, __func__);
320
321         if (NULL == dev->empress_dev)
322                 return 0;
323         flush_work(&dev->empress_workqueue);
324         video_unregister_device(dev->empress_dev);
325         vb2_queue_release(&dev->empress_vbq);
326         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
327         dev->empress_dev = NULL;
328         return 0;
329 }
330
331 static struct saa7134_mpeg_ops empress_ops = {
332         .type          = SAA7134_MPEG_EMPRESS,
333         .init          = empress_init,
334         .fini          = empress_fini,
335         .signal_change = empress_signal_change,
336 };
337
338 static int __init empress_register(void)
339 {
340         return saa7134_ts_register(&empress_ops);
341 }
342
343 static void __exit empress_unregister(void)
344 {
345         saa7134_ts_unregister(&empress_ops);
346 }
347
348 module_init(empress_register);
349 module_exit(empress_unregister);