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(msecs: 20); |
67 | saa_writeb(SAA7134_SPECIAL_MODE, 0x01); |
68 | msleep(msecs: 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(pix_fmt: &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(mbus_fmt: &format.format, pix_fmt: &f->fmt.pix, MEDIA_BUS_FMT_FIXED); |
126 | saa_call_all(dev, pad, set_fmt, NULL, &format); |
127 | v4l2_fill_pix_format(pix_fmt: &f->fmt.pix, mbus_fmt: &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_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(mbus_fmt: &format.format, pix_fmt: &f->fmt.pix, MEDIA_BUS_FMT_FIXED); |
149 | saa_call_all(dev, pad, set_fmt, &pad_state, &format); |
150 | v4l2_fill_pix_format(pix_fmt: &f->fmt.pix, mbus_fmt: &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 | |
159 | static 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 | |
170 | static 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 | |
200 | static 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 | |
208 | static 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 | |
220 | static void empress_signal_change(struct saa7134_dev *dev) |
221 | { |
222 | schedule_work(work: &dev->empress_workqueue); |
223 | } |
224 | |
225 | static 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 | |
242 | static 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(buf: dev->empress_dev->name, size: sizeof(dev->empress_dev->name), |
257 | fmt: "%s empress (%s)" , dev->name, |
258 | saa7134_boards[dev->board].name); |
259 | v4l2_ctrl_handler_init(hdl, 21); |
260 | v4l2_ctrl_add_handler(hdl, add: &dev->ctrl_handler, filter: empress_ctrl_filter, from_other_dev: false); |
261 | if (dev->empress_sd) |
262 | v4l2_ctrl_add_handler(hdl, add: dev->empress_sd->ctrl_handler, NULL, from_other_dev: true); |
263 | if (hdl->error) { |
264 | video_device_release(vdev: 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(vdev: 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(vdev: dev->empress_dev, data: dev); |
300 | err = video_register_device(vdev: dev->empress_dev,type: VFL_TYPE_VIDEO, |
301 | nr: 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(vdev: 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(work: &dev->empress_workqueue); |
313 | return 0; |
314 | } |
315 | |
316 | static 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(work: &dev->empress_workqueue); |
323 | vb2_video_unregister_device(vdev: dev->empress_dev); |
324 | v4l2_ctrl_handler_free(hdl: &dev->empress_ctrl_handler); |
325 | dev->empress_dev = NULL; |
326 | return 0; |
327 | } |
328 | |
329 | static 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 | |
336 | static int __init empress_register(void) |
337 | { |
338 | return saa7134_ts_register(ops: &empress_ops); |
339 | } |
340 | |
341 | static void __exit empress_unregister(void) |
342 | { |
343 | saa7134_ts_unregister(ops: &empress_ops); |
344 | } |
345 | |
346 | module_init(empress_register); |
347 | module_exit(empress_unregister); |
348 | |