2 * vimc-sensor.c Virtual Media Controller Driver
4 * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 #include <linux/component.h>
19 #include <linux/freezer.h>
20 #include <linux/kthread.h>
21 #include <linux/module.h>
22 #include <linux/mod_devicetable.h>
23 #include <linux/platform_device.h>
24 #include <linux/v4l2-mediabus.h>
25 #include <linux/vmalloc.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-subdev.h>
29 #include <media/tpg/v4l2-tpg.h>
31 #include "vimc-common.h"
33 #define VIMC_SEN_DRV_NAME "vimc-sensor"
35 struct vimc_sen_device {
36 struct vimc_ent_device ved;
37 struct v4l2_subdev sd;
40 struct task_struct *kthread_sen;
42 /* The active format */
43 struct v4l2_mbus_framefmt mbus_format;
44 struct v4l2_ctrl_handler hdl;
47 static const struct v4l2_mbus_framefmt fmt_default = {
50 .code = MEDIA_BUS_FMT_RGB888_1X24,
51 .field = V4L2_FIELD_NONE,
52 .colorspace = V4L2_COLORSPACE_DEFAULT,
55 static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
56 struct v4l2_subdev_pad_config *cfg)
60 for (i = 0; i < sd->entity.num_pads; i++) {
61 struct v4l2_mbus_framefmt *mf;
63 mf = v4l2_subdev_get_try_format(sd, cfg, i);
70 static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
71 struct v4l2_subdev_pad_config *cfg,
72 struct v4l2_subdev_mbus_code_enum *code)
74 const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
79 code->code = vpix->code;
84 static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
85 struct v4l2_subdev_pad_config *cfg,
86 struct v4l2_subdev_frame_size_enum *fse)
88 const struct vimc_pix_map *vpix;
93 /* Only accept code in the pix map table */
94 vpix = vimc_pix_map_by_code(fse->code);
98 fse->min_width = VIMC_FRAME_MIN_WIDTH;
99 fse->max_width = VIMC_FRAME_MAX_WIDTH;
100 fse->min_height = VIMC_FRAME_MIN_HEIGHT;
101 fse->max_height = VIMC_FRAME_MAX_HEIGHT;
106 static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
107 struct v4l2_subdev_pad_config *cfg,
108 struct v4l2_subdev_format *fmt)
110 struct vimc_sen_device *vsen =
111 container_of(sd, struct vimc_sen_device, sd);
113 fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
114 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
120 static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
122 const struct vimc_pix_map *vpix =
123 vimc_pix_map_by_code(vsen->mbus_format.code);
125 tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
126 vsen->mbus_format.height, vsen->mbus_format.field);
127 tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp);
128 tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
129 tpg_s_fourcc(&vsen->tpg, vpix->pixelformat);
130 /* TODO: add support for V4L2_FIELD_ALTERNATE */
131 tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
132 tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
133 tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
134 tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
135 tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
138 static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
140 const struct vimc_pix_map *vpix;
142 /* Only accept code in the pix map table */
143 vpix = vimc_pix_map_by_code(fmt->code);
145 fmt->code = fmt_default.code;
147 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
148 VIMC_FRAME_MAX_WIDTH) & ~1;
149 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
150 VIMC_FRAME_MAX_HEIGHT) & ~1;
152 /* TODO: add support for V4L2_FIELD_ALTERNATE */
153 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
154 fmt->field = fmt_default.field;
156 vimc_colorimetry_clamp(fmt);
159 static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
160 struct v4l2_subdev_pad_config *cfg,
161 struct v4l2_subdev_format *fmt)
163 struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
164 struct v4l2_mbus_framefmt *mf;
166 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
167 /* Do not change the format while stream is on */
171 mf = &vsen->mbus_format;
173 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
176 /* Set the new format */
177 vimc_sen_adjust_fmt(&fmt->format);
179 dev_dbg(vsen->dev, "%s: format update: "
180 "old:%dx%d (0x%x, %d, %d, %d, %d) "
181 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
183 mf->width, mf->height, mf->code,
184 mf->colorspace, mf->quantization,
185 mf->xfer_func, mf->ycbcr_enc,
187 fmt->format.width, fmt->format.height, fmt->format.code,
188 fmt->format.colorspace, fmt->format.quantization,
189 fmt->format.xfer_func, fmt->format.ycbcr_enc);
196 static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
197 .init_cfg = vimc_sen_init_cfg,
198 .enum_mbus_code = vimc_sen_enum_mbus_code,
199 .enum_frame_size = vimc_sen_enum_frame_size,
200 .get_fmt = vimc_sen_get_fmt,
201 .set_fmt = vimc_sen_set_fmt,
204 static int vimc_sen_tpg_thread(void *data)
206 struct vimc_sen_device *vsen = data;
210 set_current_state(TASK_UNINTERRUPTIBLE);
214 if (kthread_should_stop())
217 tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
219 /* Send the frame to all source pads */
220 for (i = 0; i < vsen->sd.entity.num_pads; i++)
221 vimc_propagate_frame(&vsen->sd.entity.pads[i],
224 /* 60 frames per second */
225 schedule_timeout(HZ/60);
231 static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
233 struct vimc_sen_device *vsen =
234 container_of(sd, struct vimc_sen_device, sd);
238 const struct vimc_pix_map *vpix;
239 unsigned int frame_size;
241 if (vsen->kthread_sen)
242 /* tpg is already executing */
245 /* Calculate the frame size */
246 vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
247 frame_size = vsen->mbus_format.width * vpix->bpp *
248 vsen->mbus_format.height;
251 * Allocate the frame buffer. Use vmalloc to be able to
252 * allocate a large amount of memory
254 vsen->frame = vmalloc(frame_size);
258 /* configure the test pattern generator */
259 vimc_sen_tpg_s_format(vsen);
261 /* Initialize the image generator thread */
262 vsen->kthread_sen = kthread_run(vimc_sen_tpg_thread, vsen,
263 "%s-sen", vsen->sd.v4l2_dev->name);
264 if (IS_ERR(vsen->kthread_sen)) {
265 dev_err(vsen->dev, "%s: kernel_thread() failed\n",
269 return PTR_ERR(vsen->kthread_sen);
272 if (!vsen->kthread_sen)
275 /* Stop image generator */
276 ret = kthread_stop(vsen->kthread_sen);
280 vsen->kthread_sen = NULL;
289 static struct v4l2_subdev_core_ops vimc_sen_core_ops = {
290 .log_status = v4l2_ctrl_subdev_log_status,
291 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
292 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
295 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
296 .s_stream = vimc_sen_s_stream,
299 static const struct v4l2_subdev_ops vimc_sen_ops = {
300 .core = &vimc_sen_core_ops,
301 .pad = &vimc_sen_pad_ops,
302 .video = &vimc_sen_video_ops,
305 static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
307 struct vimc_sen_device *vsen =
308 container_of(ctrl->handler, struct vimc_sen_device, hdl);
311 case VIMC_CID_TEST_PATTERN:
312 tpg_s_pattern(&vsen->tpg, ctrl->val);
315 tpg_s_hflip(&vsen->tpg, ctrl->val);
318 tpg_s_vflip(&vsen->tpg, ctrl->val);
320 case V4L2_CID_BRIGHTNESS:
321 tpg_s_brightness(&vsen->tpg, ctrl->val);
323 case V4L2_CID_CONTRAST:
324 tpg_s_contrast(&vsen->tpg, ctrl->val);
327 tpg_s_hue(&vsen->tpg, ctrl->val);
329 case V4L2_CID_SATURATION:
330 tpg_s_saturation(&vsen->tpg, ctrl->val);
338 static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = {
339 .s_ctrl = vimc_sen_s_ctrl,
342 static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
345 struct vimc_ent_device *ved = dev_get_drvdata(comp);
346 struct vimc_sen_device *vsen =
347 container_of(ved, struct vimc_sen_device, ved);
349 vimc_ent_sd_unregister(ved, &vsen->sd);
350 v4l2_ctrl_handler_free(&vsen->hdl);
351 tpg_free(&vsen->tpg);
355 /* Image Processing Controls */
356 static const struct v4l2_ctrl_config vimc_sen_ctrl_class = {
357 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
358 .id = VIMC_CID_VIMC_CLASS,
359 .name = "VIMC Controls",
360 .type = V4L2_CTRL_TYPE_CTRL_CLASS,
363 static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
364 .ops = &vimc_sen_ctrl_ops,
365 .id = VIMC_CID_TEST_PATTERN,
366 .name = "Test Pattern",
367 .type = V4L2_CTRL_TYPE_MENU,
368 .max = TPG_PAT_NOISE,
369 .qmenu = tpg_pattern_strings,
372 static int vimc_sen_comp_bind(struct device *comp, struct device *master,
375 struct v4l2_device *v4l2_dev = master_data;
376 struct vimc_platform_data *pdata = comp->platform_data;
377 struct vimc_sen_device *vsen;
380 /* Allocate the vsen struct */
381 vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
385 v4l2_ctrl_handler_init(&vsen->hdl, 4);
387 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
388 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
389 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
390 V4L2_CID_VFLIP, 0, 1, 1, 0);
391 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
392 V4L2_CID_HFLIP, 0, 1, 1, 0);
393 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
394 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
395 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
396 V4L2_CID_CONTRAST, 0, 255, 1, 128);
397 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
398 V4L2_CID_HUE, -128, 127, 1, 0);
399 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
400 V4L2_CID_SATURATION, 0, 255, 1, 128);
401 vsen->sd.ctrl_handler = &vsen->hdl;
402 if (vsen->hdl.error) {
403 ret = vsen->hdl.error;
407 /* Initialize ved and sd */
408 ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
410 MEDIA_ENT_F_CAM_SENSOR, 1,
411 (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
416 dev_set_drvdata(comp, &vsen->ved);
419 /* Initialize the frame format */
420 vsen->mbus_format = fmt_default;
422 /* Initialize the test pattern generator */
423 tpg_init(&vsen->tpg, vsen->mbus_format.width,
424 vsen->mbus_format.height);
425 ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
427 goto err_unregister_ent_sd;
431 err_unregister_ent_sd:
432 vimc_ent_sd_unregister(&vsen->ved, &vsen->sd);
434 v4l2_ctrl_handler_free(&vsen->hdl);
441 static const struct component_ops vimc_sen_comp_ops = {
442 .bind = vimc_sen_comp_bind,
443 .unbind = vimc_sen_comp_unbind,
446 static int vimc_sen_probe(struct platform_device *pdev)
448 return component_add(&pdev->dev, &vimc_sen_comp_ops);
451 static int vimc_sen_remove(struct platform_device *pdev)
453 component_del(&pdev->dev, &vimc_sen_comp_ops);
458 static const struct platform_device_id vimc_sen_driver_ids[] = {
460 .name = VIMC_SEN_DRV_NAME,
465 static struct platform_driver vimc_sen_pdrv = {
466 .probe = vimc_sen_probe,
467 .remove = vimc_sen_remove,
468 .id_table = vimc_sen_driver_ids,
470 .name = VIMC_SEN_DRV_NAME,
474 module_platform_driver(vimc_sen_pdrv);
476 MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
478 MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
479 MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
480 MODULE_LICENSE("GPL");