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18#include <linux/component.h>
19#include <linux/freezer.h>
20#include <linux/kthread.h>
21#include <linux/module.h>
22#include <linux/platform_device.h>
23#include <linux/v4l2-mediabus.h>
24#include <linux/vmalloc.h>
25#include <media/v4l2-subdev.h>
26#include <media/v4l2-tpg.h>
27
28#include "vimc-common.h"
29
30#define VIMC_SEN_DRV_NAME "vimc-sensor"
31
32struct vimc_sen_device {
33 struct vimc_ent_device ved;
34 struct v4l2_subdev sd;
35 struct device *dev;
36 struct tpg_data tpg;
37 struct task_struct *kthread_sen;
38 u8 *frame;
39
40 struct v4l2_mbus_framefmt mbus_format;
41};
42
43static const struct v4l2_mbus_framefmt fmt_default = {
44 .width = 640,
45 .height = 480,
46 .code = MEDIA_BUS_FMT_RGB888_1X24,
47 .field = V4L2_FIELD_NONE,
48 .colorspace = V4L2_COLORSPACE_DEFAULT,
49};
50
51static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
52 struct v4l2_subdev_pad_config *cfg)
53{
54 unsigned int i;
55
56 for (i = 0; i < sd->entity.num_pads; i++) {
57 struct v4l2_mbus_framefmt *mf;
58
59 mf = v4l2_subdev_get_try_format(sd, cfg, i);
60 *mf = fmt_default;
61 }
62
63 return 0;
64}
65
66static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
67 struct v4l2_subdev_pad_config *cfg,
68 struct v4l2_subdev_mbus_code_enum *code)
69{
70 const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
71
72 if (!vpix)
73 return -EINVAL;
74
75 code->code = vpix->code;
76
77 return 0;
78}
79
80static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
81 struct v4l2_subdev_pad_config *cfg,
82 struct v4l2_subdev_frame_size_enum *fse)
83{
84 const struct vimc_pix_map *vpix;
85
86 if (fse->index)
87 return -EINVAL;
88
89
90 vpix = vimc_pix_map_by_code(fse->code);
91 if (!vpix)
92 return -EINVAL;
93
94 fse->min_width = VIMC_FRAME_MIN_WIDTH;
95 fse->max_width = VIMC_FRAME_MAX_WIDTH;
96 fse->min_height = VIMC_FRAME_MIN_HEIGHT;
97 fse->max_height = VIMC_FRAME_MAX_HEIGHT;
98
99 return 0;
100}
101
102static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
103 struct v4l2_subdev_pad_config *cfg,
104 struct v4l2_subdev_format *fmt)
105{
106 struct vimc_sen_device *vsen =
107 container_of(sd, struct vimc_sen_device, sd);
108
109 fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
110 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
111 vsen->mbus_format;
112
113 return 0;
114}
115
116static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
117{
118 const struct vimc_pix_map *vpix =
119 vimc_pix_map_by_code(vsen->mbus_format.code);
120
121 tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
122 vsen->mbus_format.height, vsen->mbus_format.field);
123 tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp);
124 tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
125 tpg_s_fourcc(&vsen->tpg, vpix->pixelformat);
126
127 tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
128 tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
129 tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
130 tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
131 tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
132}
133
134static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
135{
136 const struct vimc_pix_map *vpix;
137
138
139 vpix = vimc_pix_map_by_code(fmt->code);
140 if (!vpix)
141 fmt->code = fmt_default.code;
142
143 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
144 VIMC_FRAME_MAX_WIDTH) & ~1;
145 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
146 VIMC_FRAME_MAX_HEIGHT) & ~1;
147
148
149 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
150 fmt->field = fmt_default.field;
151
152 vimc_colorimetry_clamp(fmt);
153}
154
155static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
156 struct v4l2_subdev_pad_config *cfg,
157 struct v4l2_subdev_format *fmt)
158{
159 struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
160 struct v4l2_mbus_framefmt *mf;
161
162 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
163
164 if (vsen->frame)
165 return -EBUSY;
166
167 mf = &vsen->mbus_format;
168 } else {
169 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
170 }
171
172
173 vimc_sen_adjust_fmt(&fmt->format);
174
175 dev_dbg(vsen->dev, "%s: format update: "
176 "old:%dx%d (0x%x, %d, %d, %d, %d) "
177 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
178
179 mf->width, mf->height, mf->code,
180 mf->colorspace, mf->quantization,
181 mf->xfer_func, mf->ycbcr_enc,
182
183 fmt->format.width, fmt->format.height, fmt->format.code,
184 fmt->format.colorspace, fmt->format.quantization,
185 fmt->format.xfer_func, fmt->format.ycbcr_enc);
186
187 *mf = fmt->format;
188
189 return 0;
190}
191
192static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
193 .init_cfg = vimc_sen_init_cfg,
194 .enum_mbus_code = vimc_sen_enum_mbus_code,
195 .enum_frame_size = vimc_sen_enum_frame_size,
196 .get_fmt = vimc_sen_get_fmt,
197 .set_fmt = vimc_sen_set_fmt,
198};
199
200static int vimc_sen_tpg_thread(void *data)
201{
202 struct vimc_sen_device *vsen = data;
203 unsigned int i;
204
205 set_freezable();
206 set_current_state(TASK_UNINTERRUPTIBLE);
207
208 for (;;) {
209 try_to_freeze();
210 if (kthread_should_stop())
211 break;
212
213 tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
214
215
216 for (i = 0; i < vsen->sd.entity.num_pads; i++)
217 vimc_propagate_frame(&vsen->sd.entity.pads[i],
218 vsen->frame);
219
220
221 schedule_timeout(HZ/60);
222 }
223
224 return 0;
225}
226
227static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
228{
229 struct vimc_sen_device *vsen =
230 container_of(sd, struct vimc_sen_device, sd);
231 int ret;
232
233 if (enable) {
234 const struct vimc_pix_map *vpix;
235 unsigned int frame_size;
236
237 if (vsen->kthread_sen)
238
239 return 0;
240
241
242 vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
243 frame_size = vsen->mbus_format.width * vpix->bpp *
244 vsen->mbus_format.height;
245
246
247
248
249
250 vsen->frame = vmalloc(frame_size);
251 if (!vsen->frame)
252 return -ENOMEM;
253
254
255 vimc_sen_tpg_s_format(vsen);
256
257
258 vsen->kthread_sen = kthread_run(vimc_sen_tpg_thread, vsen,
259 "%s-sen", vsen->sd.v4l2_dev->name);
260 if (IS_ERR(vsen->kthread_sen)) {
261 dev_err(vsen->dev, "%s: kernel_thread() failed\n",
262 vsen->sd.name);
263 vfree(vsen->frame);
264 vsen->frame = NULL;
265 return PTR_ERR(vsen->kthread_sen);
266 }
267 } else {
268 if (!vsen->kthread_sen)
269 return 0;
270
271
272 ret = kthread_stop(vsen->kthread_sen);
273 if (ret)
274 return ret;
275
276 vsen->kthread_sen = NULL;
277 vfree(vsen->frame);
278 vsen->frame = NULL;
279 return 0;
280 }
281
282 return 0;
283}
284
285static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
286 .s_stream = vimc_sen_s_stream,
287};
288
289static const struct v4l2_subdev_ops vimc_sen_ops = {
290 .pad = &vimc_sen_pad_ops,
291 .video = &vimc_sen_video_ops,
292};
293
294static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
295 void *master_data)
296{
297 struct vimc_ent_device *ved = dev_get_drvdata(comp);
298 struct vimc_sen_device *vsen =
299 container_of(ved, struct vimc_sen_device, ved);
300
301 vimc_ent_sd_unregister(ved, &vsen->sd);
302 tpg_free(&vsen->tpg);
303 kfree(vsen);
304}
305
306static int vimc_sen_comp_bind(struct device *comp, struct device *master,
307 void *master_data)
308{
309 struct v4l2_device *v4l2_dev = master_data;
310 struct vimc_platform_data *pdata = comp->platform_data;
311 struct vimc_sen_device *vsen;
312 int ret;
313
314
315 vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
316 if (!vsen)
317 return -ENOMEM;
318
319
320 ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
321 pdata->entity_name,
322 MEDIA_ENT_F_ATV_DECODER, 1,
323 (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
324 &vimc_sen_ops);
325 if (ret)
326 goto err_free_vsen;
327
328 dev_set_drvdata(comp, &vsen->ved);
329 vsen->dev = comp;
330
331
332 vsen->mbus_format = fmt_default;
333
334
335 tpg_init(&vsen->tpg, vsen->mbus_format.width,
336 vsen->mbus_format.height);
337 ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
338 if (ret)
339 goto err_unregister_ent_sd;
340
341 return 0;
342
343err_unregister_ent_sd:
344 vimc_ent_sd_unregister(&vsen->ved, &vsen->sd);
345err_free_vsen:
346 kfree(vsen);
347
348 return ret;
349}
350
351static const struct component_ops vimc_sen_comp_ops = {
352 .bind = vimc_sen_comp_bind,
353 .unbind = vimc_sen_comp_unbind,
354};
355
356static int vimc_sen_probe(struct platform_device *pdev)
357{
358 return component_add(&pdev->dev, &vimc_sen_comp_ops);
359}
360
361static int vimc_sen_remove(struct platform_device *pdev)
362{
363 component_del(&pdev->dev, &vimc_sen_comp_ops);
364
365 return 0;
366}
367
368static const struct platform_device_id vimc_sen_driver_ids[] = {
369 {
370 .name = VIMC_SEN_DRV_NAME,
371 },
372 { }
373};
374
375static struct platform_driver vimc_sen_pdrv = {
376 .probe = vimc_sen_probe,
377 .remove = vimc_sen_remove,
378 .id_table = vimc_sen_driver_ids,
379 .driver = {
380 .name = VIMC_SEN_DRV_NAME,
381 },
382};
383
384module_platform_driver(vimc_sen_pdrv);
385
386MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
387
388MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
389MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
390MODULE_LICENSE("GPL");
391
