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_DESCRIPTION("Philips SAA7134 empress support");
23 MODULE_LICENSE("GPL");
24
25 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
26
27 module_param_array(empress_nr, int, NULL, 0444);
28 MODULE_PARM_DESC(empress_nr,"ts device number");
29
30 /* ------------------------------------------------------------------ */
31
start_streaming(struct vb2_queue * vq,unsigned int count)32 static 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
stop_streaming(struct vb2_queue * vq)60 static 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
76 static 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 .wait_prepare = vb2_ops_wait_prepare,
82 .wait_finish = vb2_ops_wait_finish,
83 .start_streaming = start_streaming,
84 .stop_streaming = stop_streaming,
85 };
86
87 /* ------------------------------------------------------------------ */
88
empress_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)89 static int empress_enum_fmt_vid_cap(struct file *file, void *priv,
90 struct v4l2_fmtdesc *f)
91 {
92 if (f->index != 0)
93 return -EINVAL;
94
95 f->pixelformat = V4L2_PIX_FMT_MPEG;
96 return 0;
97 }
98
empress_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)99 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
100 struct v4l2_format *f)
101 {
102 struct saa7134_dev *dev = video_drvdata(file);
103 struct v4l2_subdev_format fmt = {
104 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
105 };
106 struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
107
108 saa_call_all(dev, pad, get_fmt, NULL, &fmt);
109
110 v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
111 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
112 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
113 f->fmt.pix.bytesperline = 0;
114
115 return 0;
116 }
117
empress_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)118 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
119 struct v4l2_format *f)
120 {
121 struct saa7134_dev *dev = video_drvdata(file);
122 struct v4l2_subdev_format format = {
123 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
124 };
125
126 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
127 saa_call_all(dev, pad, set_fmt, NULL, &format);
128 v4l2_fill_pix_format(&f->fmt.pix, &format.format);
129
130 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
131 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
132 f->fmt.pix.bytesperline = 0;
133
134 return 0;
135 }
136
empress_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)137 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
138 struct v4l2_format *f)
139 {
140 struct saa7134_dev *dev = video_drvdata(file);
141 struct v4l2_subdev_pad_config pad_cfg;
142 struct v4l2_subdev_state pad_state = {
143 .pads = &pad_cfg,
144 };
145 struct v4l2_subdev_format format = {
146 .which = V4L2_SUBDEV_FORMAT_TRY,
147 };
148
149 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
150 saa_call_all(dev, pad, set_fmt, &pad_state, &format);
151 v4l2_fill_pix_format(&f->fmt.pix, &format.format);
152
153 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
154 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
155 f->fmt.pix.bytesperline = 0;
156
157 return 0;
158 }
159
160 static const struct v4l2_file_operations ts_fops =
161 {
162 .owner = THIS_MODULE,
163 .open = v4l2_fh_open,
164 .release = vb2_fop_release,
165 .read = vb2_fop_read,
166 .poll = vb2_fop_poll,
167 .mmap = vb2_fop_mmap,
168 .unlocked_ioctl = video_ioctl2,
169 };
170
171 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
172 .vidioc_querycap = saa7134_querycap,
173 .vidioc_enum_fmt_vid_cap = empress_enum_fmt_vid_cap,
174 .vidioc_try_fmt_vid_cap = empress_try_fmt_vid_cap,
175 .vidioc_s_fmt_vid_cap = empress_s_fmt_vid_cap,
176 .vidioc_g_fmt_vid_cap = empress_g_fmt_vid_cap,
177 .vidioc_reqbufs = vb2_ioctl_reqbufs,
178 .vidioc_querybuf = vb2_ioctl_querybuf,
179 .vidioc_qbuf = vb2_ioctl_qbuf,
180 .vidioc_dqbuf = vb2_ioctl_dqbuf,
181 .vidioc_expbuf = vb2_ioctl_expbuf,
182 .vidioc_streamon = vb2_ioctl_streamon,
183 .vidioc_streamoff = vb2_ioctl_streamoff,
184 .vidioc_g_frequency = saa7134_g_frequency,
185 .vidioc_s_frequency = saa7134_s_frequency,
186 .vidioc_g_tuner = saa7134_g_tuner,
187 .vidioc_s_tuner = saa7134_s_tuner,
188 .vidioc_enum_input = saa7134_enum_input,
189 .vidioc_g_input = saa7134_g_input,
190 .vidioc_s_input = saa7134_s_input,
191 .vidioc_s_std = saa7134_s_std,
192 .vidioc_g_std = saa7134_g_std,
193 .vidioc_querystd = saa7134_querystd,
194 .vidioc_log_status = v4l2_ctrl_log_status,
195 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
196 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
197 };
198
199 /* ----------------------------------------------------------- */
200
201 static const struct video_device saa7134_empress_template = {
202 .name = "saa7134-empress",
203 .fops = &ts_fops,
204 .ioctl_ops = &ts_ioctl_ops,
205
206 .tvnorms = SAA7134_NORMS,
207 };
208
empress_signal_update(struct work_struct * work)209 static void empress_signal_update(struct work_struct *work)
210 {
211 struct saa7134_dev* dev =
212 container_of(work, struct saa7134_dev, empress_workqueue);
213
214 if (dev->nosignal) {
215 pr_debug("no video signal\n");
216 } else {
217 pr_debug("video signal acquired\n");
218 }
219 }
220
empress_signal_change(struct saa7134_dev * dev)221 static void empress_signal_change(struct saa7134_dev *dev)
222 {
223 schedule_work(&dev->empress_workqueue);
224 }
225
empress_ctrl_filter(const struct v4l2_ctrl * ctrl)226 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
227 {
228 switch (ctrl->id) {
229 case V4L2_CID_BRIGHTNESS:
230 case V4L2_CID_HUE:
231 case V4L2_CID_CONTRAST:
232 case V4L2_CID_SATURATION:
233 case V4L2_CID_AUDIO_MUTE:
234 case V4L2_CID_AUDIO_VOLUME:
235 case V4L2_CID_PRIVATE_INVERT:
236 case V4L2_CID_PRIVATE_AUTOMUTE:
237 return true;
238 default:
239 return false;
240 }
241 }
242
empress_init(struct saa7134_dev * dev)243 static int empress_init(struct saa7134_dev *dev)
244 {
245 struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
246 struct vb2_queue *q;
247 int err;
248
249 pr_debug("%s: %s\n", dev->name, __func__);
250 dev->empress_dev = video_device_alloc();
251 if (NULL == dev->empress_dev)
252 return -ENOMEM;
253 *(dev->empress_dev) = saa7134_empress_template;
254 dev->empress_dev->v4l2_dev = &dev->v4l2_dev;
255 dev->empress_dev->release = video_device_release;
256 dev->empress_dev->lock = &dev->lock;
257 snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
258 "%s empress (%s)", dev->name,
259 saa7134_boards[dev->board].name);
260 v4l2_ctrl_handler_init(hdl, 21);
261 v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
262 if (dev->empress_sd)
263 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
264 if (hdl->error) {
265 video_device_release(dev->empress_dev);
266 return hdl->error;
267 }
268 dev->empress_dev->ctrl_handler = hdl;
269
270 INIT_WORK(&dev->empress_workqueue, empress_signal_update);
271
272 q = &dev->empress_vbq;
273 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
274 /*
275 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
276 * transfers that do not start at the beginning of a page. A USERPTR
277 * can start anywhere in a page, so USERPTR support is a no-go.
278 */
279 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
280 q->drv_priv = &dev->ts_q;
281 q->ops = &saa7134_empress_qops;
282 q->gfp_flags = GFP_DMA32;
283 q->mem_ops = &vb2_dma_sg_memops;
284 q->buf_struct_size = sizeof(struct saa7134_buf);
285 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
286 q->lock = &dev->lock;
287 q->dev = &dev->pci->dev;
288 err = vb2_queue_init(q);
289 if (err) {
290 video_device_release(dev->empress_dev);
291 dev->empress_dev = NULL;
292 return err;
293 }
294 dev->empress_dev->queue = q;
295 dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
296 V4L2_CAP_VIDEO_CAPTURE;
297 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
298 dev->empress_dev->device_caps |= V4L2_CAP_TUNER;
299
300 video_set_drvdata(dev->empress_dev, dev);
301 err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO,
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
empress_fini(struct saa7134_dev * dev)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 vb2_video_unregister_device(dev->empress_dev);
325 v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
326 dev->empress_dev = NULL;
327 return 0;
328 }
329
330 static struct saa7134_mpeg_ops empress_ops = {
331 .type = SAA7134_MPEG_EMPRESS,
332 .init = empress_init,
333 .fini = empress_fini,
334 .signal_change = empress_signal_change,
335 };
336
empress_register(void)337 static int __init empress_register(void)
338 {
339 return saa7134_ts_register(&empress_ops);
340 }
341
empress_unregister(void)342 static void __exit empress_unregister(void)
343 {
344 saa7134_ts_unregister(&empress_ops);
345 }
346
347 module_init(empress_register);
348 module_exit(empress_unregister);
349