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9#include <linux/device.h>
10#include <linux/pm_runtime.h>
11
12#include <media/v4l2-ioctl.h>
13#include <media/v4l2-mc.h>
14#include <media/videobuf2-v4l2.h>
15
16#include "sun4i_csi.h"
17
18#define CSI_DEFAULT_WIDTH 640
19#define CSI_DEFAULT_HEIGHT 480
20
21static const struct sun4i_csi_format sun4i_csi_formats[] = {
22
23 {
24 .mbus = MEDIA_BUS_FMT_YUYV8_2X8,
25 .fourcc = V4L2_PIX_FMT_YUV420M,
26 .input = CSI_INPUT_YUV,
27 .output = CSI_OUTPUT_YUV_420_PLANAR,
28 .num_planes = 3,
29 .bpp = { 8, 8, 8 },
30 .hsub = 2,
31 .vsub = 2,
32 },
33};
34
35const struct sun4i_csi_format *sun4i_csi_find_format(const u32 *fourcc,
36 const u32 *mbus)
37{
38 unsigned int i;
39
40 for (i = 0; i < ARRAY_SIZE(sun4i_csi_formats); i++) {
41 if (fourcc && *fourcc != sun4i_csi_formats[i].fourcc)
42 continue;
43
44 if (mbus && *mbus != sun4i_csi_formats[i].mbus)
45 continue;
46
47 return &sun4i_csi_formats[i];
48 }
49
50 return NULL;
51}
52
53static int sun4i_csi_querycap(struct file *file, void *priv,
54 struct v4l2_capability *cap)
55{
56 struct sun4i_csi *csi = video_drvdata(file);
57
58 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
59 strscpy(cap->card, "sun4i-csi", sizeof(cap->card));
60 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
61 dev_name(csi->dev));
62
63 return 0;
64}
65
66static int sun4i_csi_enum_input(struct file *file, void *priv,
67 struct v4l2_input *inp)
68{
69 if (inp->index != 0)
70 return -EINVAL;
71
72 inp->type = V4L2_INPUT_TYPE_CAMERA;
73 strscpy(inp->name, "Camera", sizeof(inp->name));
74
75 return 0;
76}
77
78static int sun4i_csi_g_input(struct file *file, void *fh,
79 unsigned int *i)
80{
81 *i = 0;
82
83 return 0;
84}
85
86static int sun4i_csi_s_input(struct file *file, void *fh,
87 unsigned int i)
88{
89 if (i != 0)
90 return -EINVAL;
91
92 return 0;
93}
94
95static void _sun4i_csi_try_fmt(struct sun4i_csi *csi,
96 struct v4l2_pix_format_mplane *pix)
97{
98 const struct sun4i_csi_format *_fmt;
99 unsigned int height, width;
100 unsigned int i;
101
102 _fmt = sun4i_csi_find_format(&pix->pixelformat, NULL);
103 if (!_fmt)
104 _fmt = &sun4i_csi_formats[0];
105
106 pix->field = V4L2_FIELD_NONE;
107 pix->colorspace = V4L2_COLORSPACE_SRGB;
108 pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
109 pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
110 pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, pix->colorspace,
111 pix->ycbcr_enc);
112
113 pix->num_planes = _fmt->num_planes;
114 pix->pixelformat = _fmt->fourcc;
115
116
117 width = ALIGN(pix->width, _fmt->hsub);
118 height = ALIGN(pix->height, _fmt->vsub);
119
120
121 pix->width = clamp(width, _fmt->hsub, CSI_MAX_WIDTH);
122 pix->height = clamp(height, _fmt->vsub, CSI_MAX_HEIGHT);
123
124 for (i = 0; i < _fmt->num_planes; i++) {
125 unsigned int hsub = i > 0 ? _fmt->hsub : 1;
126 unsigned int vsub = i > 0 ? _fmt->vsub : 1;
127 unsigned int bpl;
128
129 bpl = pix->width / hsub * _fmt->bpp[i] / 8;
130 pix->plane_fmt[i].bytesperline = bpl;
131 pix->plane_fmt[i].sizeimage = bpl * pix->height / vsub;
132 }
133}
134
135static int sun4i_csi_try_fmt_vid_cap(struct file *file, void *priv,
136 struct v4l2_format *f)
137{
138 struct sun4i_csi *csi = video_drvdata(file);
139
140 _sun4i_csi_try_fmt(csi, &f->fmt.pix_mp);
141
142 return 0;
143}
144
145static int sun4i_csi_s_fmt_vid_cap(struct file *file, void *priv,
146 struct v4l2_format *f)
147{
148 struct sun4i_csi *csi = video_drvdata(file);
149
150 _sun4i_csi_try_fmt(csi, &f->fmt.pix_mp);
151 csi->fmt = f->fmt.pix_mp;
152
153 return 0;
154}
155
156static int sun4i_csi_g_fmt_vid_cap(struct file *file, void *priv,
157 struct v4l2_format *f)
158{
159 struct sun4i_csi *csi = video_drvdata(file);
160
161 f->fmt.pix_mp = csi->fmt;
162
163 return 0;
164}
165
166static int sun4i_csi_enum_fmt_vid_cap(struct file *file, void *priv,
167 struct v4l2_fmtdesc *f)
168{
169 if (f->index >= ARRAY_SIZE(sun4i_csi_formats))
170 return -EINVAL;
171
172 f->pixelformat = sun4i_csi_formats[f->index].fourcc;
173
174 return 0;
175}
176
177static const struct v4l2_ioctl_ops sun4i_csi_ioctl_ops = {
178 .vidioc_querycap = sun4i_csi_querycap,
179
180 .vidioc_enum_fmt_vid_cap = sun4i_csi_enum_fmt_vid_cap,
181 .vidioc_g_fmt_vid_cap_mplane = sun4i_csi_g_fmt_vid_cap,
182 .vidioc_s_fmt_vid_cap_mplane = sun4i_csi_s_fmt_vid_cap,
183 .vidioc_try_fmt_vid_cap_mplane = sun4i_csi_try_fmt_vid_cap,
184
185 .vidioc_enum_input = sun4i_csi_enum_input,
186 .vidioc_g_input = sun4i_csi_g_input,
187 .vidioc_s_input = sun4i_csi_s_input,
188
189 .vidioc_reqbufs = vb2_ioctl_reqbufs,
190 .vidioc_create_bufs = vb2_ioctl_create_bufs,
191 .vidioc_querybuf = vb2_ioctl_querybuf,
192 .vidioc_qbuf = vb2_ioctl_qbuf,
193 .vidioc_dqbuf = vb2_ioctl_dqbuf,
194 .vidioc_expbuf = vb2_ioctl_expbuf,
195 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
196 .vidioc_streamon = vb2_ioctl_streamon,
197 .vidioc_streamoff = vb2_ioctl_streamoff,
198};
199
200static int sun4i_csi_open(struct file *file)
201{
202 struct sun4i_csi *csi = video_drvdata(file);
203 int ret;
204
205 ret = mutex_lock_interruptible(&csi->lock);
206 if (ret)
207 return ret;
208
209 ret = pm_runtime_resume_and_get(csi->dev);
210 if (ret < 0)
211 goto err_unlock;
212
213 ret = v4l2_pipeline_pm_get(&csi->vdev.entity);
214 if (ret)
215 goto err_pm_put;
216
217 ret = v4l2_fh_open(file);
218 if (ret)
219 goto err_pipeline_pm_put;
220
221 mutex_unlock(&csi->lock);
222
223 return 0;
224
225err_pipeline_pm_put:
226 v4l2_pipeline_pm_put(&csi->vdev.entity);
227
228err_pm_put:
229 pm_runtime_put(csi->dev);
230
231err_unlock:
232 mutex_unlock(&csi->lock);
233
234 return ret;
235}
236
237static int sun4i_csi_release(struct file *file)
238{
239 struct sun4i_csi *csi = video_drvdata(file);
240
241 mutex_lock(&csi->lock);
242
243 _vb2_fop_release(file, NULL);
244
245 v4l2_pipeline_pm_put(&csi->vdev.entity);
246 pm_runtime_put(csi->dev);
247
248 mutex_unlock(&csi->lock);
249
250 return 0;
251}
252
253static const struct v4l2_file_operations sun4i_csi_fops = {
254 .owner = THIS_MODULE,
255 .open = sun4i_csi_open,
256 .release = sun4i_csi_release,
257 .unlocked_ioctl = video_ioctl2,
258 .poll = vb2_fop_poll,
259 .mmap = vb2_fop_mmap,
260};
261
262static const struct v4l2_mbus_framefmt sun4i_csi_pad_fmt_default = {
263 .width = CSI_DEFAULT_WIDTH,
264 .height = CSI_DEFAULT_HEIGHT,
265 .code = MEDIA_BUS_FMT_YUYV8_2X8,
266 .field = V4L2_FIELD_NONE,
267 .colorspace = V4L2_COLORSPACE_RAW,
268 .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
269 .quantization = V4L2_QUANTIZATION_DEFAULT,
270 .xfer_func = V4L2_XFER_FUNC_DEFAULT,
271};
272
273static int sun4i_csi_subdev_init_cfg(struct v4l2_subdev *subdev,
274 struct v4l2_subdev_state *sd_state)
275{
276 struct v4l2_mbus_framefmt *fmt;
277
278 fmt = v4l2_subdev_get_try_format(subdev, sd_state, CSI_SUBDEV_SINK);
279 *fmt = sun4i_csi_pad_fmt_default;
280
281 return 0;
282}
283
284static int sun4i_csi_subdev_get_fmt(struct v4l2_subdev *subdev,
285 struct v4l2_subdev_state *sd_state,
286 struct v4l2_subdev_format *fmt)
287{
288 struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev);
289 struct v4l2_mbus_framefmt *subdev_fmt;
290
291 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
292 subdev_fmt = v4l2_subdev_get_try_format(subdev, sd_state,
293 fmt->pad);
294 else
295 subdev_fmt = &csi->subdev_fmt;
296
297 fmt->format = *subdev_fmt;
298
299 return 0;
300}
301
302static int sun4i_csi_subdev_set_fmt(struct v4l2_subdev *subdev,
303 struct v4l2_subdev_state *sd_state,
304 struct v4l2_subdev_format *fmt)
305{
306 struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev);
307 struct v4l2_mbus_framefmt *subdev_fmt;
308
309 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
310 subdev_fmt = v4l2_subdev_get_try_format(subdev, sd_state,
311 fmt->pad);
312 else
313 subdev_fmt = &csi->subdev_fmt;
314
315
316 if (fmt->pad == CSI_SUBDEV_SINK) {
317
318 subdev_fmt->width = fmt->format.width;
319 subdev_fmt->height = fmt->format.height;
320 subdev_fmt->code = fmt->format.code;
321 }
322
323 fmt->format = *subdev_fmt;
324
325 return 0;
326}
327
328static int
329sun4i_csi_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
330 struct v4l2_subdev_state *sd_state,
331 struct v4l2_subdev_mbus_code_enum *mbus)
332{
333 if (mbus->index >= ARRAY_SIZE(sun4i_csi_formats))
334 return -EINVAL;
335
336 mbus->code = sun4i_csi_formats[mbus->index].mbus;
337
338 return 0;
339}
340
341static const struct v4l2_subdev_pad_ops sun4i_csi_subdev_pad_ops = {
342 .link_validate = v4l2_subdev_link_validate_default,
343 .init_cfg = sun4i_csi_subdev_init_cfg,
344 .get_fmt = sun4i_csi_subdev_get_fmt,
345 .set_fmt = sun4i_csi_subdev_set_fmt,
346 .enum_mbus_code = sun4i_csi_subdev_enum_mbus_code,
347};
348
349const struct v4l2_subdev_ops sun4i_csi_subdev_ops = {
350 .pad = &sun4i_csi_subdev_pad_ops,
351};
352
353int sun4i_csi_v4l2_register(struct sun4i_csi *csi)
354{
355 struct video_device *vdev = &csi->vdev;
356 int ret;
357
358 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
359 vdev->v4l2_dev = &csi->v4l;
360 vdev->queue = &csi->queue;
361 strscpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
362 vdev->release = video_device_release_empty;
363 vdev->lock = &csi->lock;
364
365
366 csi->fmt.pixelformat = sun4i_csi_formats[0].fourcc;
367 csi->fmt.width = CSI_DEFAULT_WIDTH;
368 csi->fmt.height = CSI_DEFAULT_HEIGHT;
369 _sun4i_csi_try_fmt(csi, &csi->fmt);
370 csi->subdev_fmt = sun4i_csi_pad_fmt_default;
371
372 vdev->fops = &sun4i_csi_fops;
373 vdev->ioctl_ops = &sun4i_csi_ioctl_ops;
374 video_set_drvdata(vdev, csi);
375
376 ret = video_register_device(&csi->vdev, VFL_TYPE_VIDEO, -1);
377 if (ret)
378 return ret;
379
380 dev_info(csi->dev, "Device registered as %s\n",
381 video_device_node_name(vdev));
382
383 return 0;
384}
385
