| /* |
| * vimc-sensor.c Virtual Media Controller Driver |
| * |
| * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/component.h> |
| #include <linux/freezer.h> |
| #include <linux/kthread.h> |
| #include <linux/module.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/platform_device.h> |
| #include <linux/v4l2-mediabus.h> |
| #include <linux/vmalloc.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-event.h> |
| #include <media/v4l2-subdev.h> |
| #include <media/tpg/v4l2-tpg.h> |
| |
| #include "vimc-common.h" |
| |
| #define VIMC_SEN_DRV_NAME "vimc-sensor" |
| |
| struct vimc_sen_device { |
| struct vimc_ent_device ved; |
| struct v4l2_subdev sd; |
| struct device *dev; |
| struct tpg_data tpg; |
| struct task_struct *kthread_sen; |
| u8 *frame; |
| /* The active format */ |
| struct v4l2_mbus_framefmt mbus_format; |
| struct v4l2_ctrl_handler hdl; |
| }; |
| |
| static const struct v4l2_mbus_framefmt fmt_default = { |
| .width = 640, |
| .height = 480, |
| .code = MEDIA_BUS_FMT_RGB888_1X24, |
| .field = V4L2_FIELD_NONE, |
| .colorspace = V4L2_COLORSPACE_DEFAULT, |
| }; |
| |
| static int vimc_sen_init_cfg(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sd->entity.num_pads; i++) { |
| struct v4l2_mbus_framefmt *mf; |
| |
| mf = v4l2_subdev_get_try_format(sd, cfg, i); |
| *mf = fmt_default; |
| } |
| |
| return 0; |
| } |
| |
| static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_mbus_code_enum *code) |
| { |
| const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index); |
| |
| if (!vpix) |
| return -EINVAL; |
| |
| code->code = vpix->code; |
| |
| return 0; |
| } |
| |
| static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_frame_size_enum *fse) |
| { |
| const struct vimc_pix_map *vpix; |
| |
| if (fse->index) |
| return -EINVAL; |
| |
| /* Only accept code in the pix map table */ |
| vpix = vimc_pix_map_by_code(fse->code); |
| if (!vpix) |
| return -EINVAL; |
| |
| fse->min_width = VIMC_FRAME_MIN_WIDTH; |
| fse->max_width = VIMC_FRAME_MAX_WIDTH; |
| fse->min_height = VIMC_FRAME_MIN_HEIGHT; |
| fse->max_height = VIMC_FRAME_MAX_HEIGHT; |
| |
| return 0; |
| } |
| |
| static int vimc_sen_get_fmt(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| struct vimc_sen_device *vsen = |
| container_of(sd, struct vimc_sen_device, sd); |
| |
| fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ? |
| *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) : |
| vsen->mbus_format; |
| |
| return 0; |
| } |
| |
| static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen) |
| { |
| const struct vimc_pix_map *vpix = |
| vimc_pix_map_by_code(vsen->mbus_format.code); |
| |
| tpg_reset_source(&vsen->tpg, vsen->mbus_format.width, |
| vsen->mbus_format.height, vsen->mbus_format.field); |
| tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp); |
| tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height); |
| tpg_s_fourcc(&vsen->tpg, vpix->pixelformat); |
| /* TODO: add support for V4L2_FIELD_ALTERNATE */ |
| tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false); |
| tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace); |
| tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc); |
| tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization); |
| tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func); |
| } |
| |
| static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt) |
| { |
| const struct vimc_pix_map *vpix; |
| |
| /* Only accept code in the pix map table */ |
| vpix = vimc_pix_map_by_code(fmt->code); |
| if (!vpix) |
| fmt->code = fmt_default.code; |
| |
| fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH, |
| VIMC_FRAME_MAX_WIDTH) & ~1; |
| fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT, |
| VIMC_FRAME_MAX_HEIGHT) & ~1; |
| |
| /* TODO: add support for V4L2_FIELD_ALTERNATE */ |
| if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE) |
| fmt->field = fmt_default.field; |
| |
| vimc_colorimetry_clamp(fmt); |
| } |
| |
| static int vimc_sen_set_fmt(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd); |
| struct v4l2_mbus_framefmt *mf; |
| |
| if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { |
| /* Do not change the format while stream is on */ |
| if (vsen->frame) |
| return -EBUSY; |
| |
| mf = &vsen->mbus_format; |
| } else { |
| mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); |
| } |
| |
| /* Set the new format */ |
| vimc_sen_adjust_fmt(&fmt->format); |
| |
| dev_dbg(vsen->dev, "%s: format update: " |
| "old:%dx%d (0x%x, %d, %d, %d, %d) " |
| "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name, |
| /* old */ |
| mf->width, mf->height, mf->code, |
| mf->colorspace, mf->quantization, |
| mf->xfer_func, mf->ycbcr_enc, |
| /* new */ |
| fmt->format.width, fmt->format.height, fmt->format.code, |
| fmt->format.colorspace, fmt->format.quantization, |
| fmt->format.xfer_func, fmt->format.ycbcr_enc); |
| |
| *mf = fmt->format; |
| |
| return 0; |
| } |
| |
| static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = { |
| .init_cfg = vimc_sen_init_cfg, |
| .enum_mbus_code = vimc_sen_enum_mbus_code, |
| .enum_frame_size = vimc_sen_enum_frame_size, |
| .get_fmt = vimc_sen_get_fmt, |
| .set_fmt = vimc_sen_set_fmt, |
| }; |
| |
| static int vimc_sen_tpg_thread(void *data) |
| { |
| struct vimc_sen_device *vsen = data; |
| unsigned int i; |
| |
| set_freezable(); |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| |
| for (;;) { |
| try_to_freeze(); |
| if (kthread_should_stop()) |
| break; |
| |
| tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame); |
| |
| /* Send the frame to all source pads */ |
| for (i = 0; i < vsen->sd.entity.num_pads; i++) |
| vimc_propagate_frame(&vsen->sd.entity.pads[i], |
| vsen->frame); |
| |
| /* 60 frames per second */ |
| schedule_timeout(HZ/60); |
| } |
| |
| return 0; |
| } |
| |
| static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable) |
| { |
| struct vimc_sen_device *vsen = |
| container_of(sd, struct vimc_sen_device, sd); |
| int ret; |
| |
| if (enable) { |
| const struct vimc_pix_map *vpix; |
| unsigned int frame_size; |
| |
| if (vsen->kthread_sen) |
| /* tpg is already executing */ |
| return 0; |
| |
| /* Calculate the frame size */ |
| vpix = vimc_pix_map_by_code(vsen->mbus_format.code); |
| frame_size = vsen->mbus_format.width * vpix->bpp * |
| vsen->mbus_format.height; |
| |
| /* |
| * Allocate the frame buffer. Use vmalloc to be able to |
| * allocate a large amount of memory |
| */ |
| vsen->frame = vmalloc(frame_size); |
| if (!vsen->frame) |
| return -ENOMEM; |
| |
| /* configure the test pattern generator */ |
| vimc_sen_tpg_s_format(vsen); |
| |
| /* Initialize the image generator thread */ |
| vsen->kthread_sen = kthread_run(vimc_sen_tpg_thread, vsen, |
| "%s-sen", vsen->sd.v4l2_dev->name); |
| if (IS_ERR(vsen->kthread_sen)) { |
| dev_err(vsen->dev, "%s: kernel_thread() failed\n", |
| vsen->sd.name); |
| vfree(vsen->frame); |
| vsen->frame = NULL; |
| return PTR_ERR(vsen->kthread_sen); |
| } |
| } else { |
| if (!vsen->kthread_sen) |
| return 0; |
| |
| /* Stop image generator */ |
| ret = kthread_stop(vsen->kthread_sen); |
| if (ret) |
| return ret; |
| |
| vsen->kthread_sen = NULL; |
| vfree(vsen->frame); |
| vsen->frame = NULL; |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| static struct v4l2_subdev_core_ops vimc_sen_core_ops = { |
| .log_status = v4l2_ctrl_subdev_log_status, |
| .subscribe_event = v4l2_ctrl_subdev_subscribe_event, |
| .unsubscribe_event = v4l2_event_subdev_unsubscribe, |
| }; |
| |
| static const struct v4l2_subdev_video_ops vimc_sen_video_ops = { |
| .s_stream = vimc_sen_s_stream, |
| }; |
| |
| static const struct v4l2_subdev_ops vimc_sen_ops = { |
| .core = &vimc_sen_core_ops, |
| .pad = &vimc_sen_pad_ops, |
| .video = &vimc_sen_video_ops, |
| }; |
| |
| static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct vimc_sen_device *vsen = |
| container_of(ctrl->handler, struct vimc_sen_device, hdl); |
| |
| switch (ctrl->id) { |
| case VIMC_CID_TEST_PATTERN: |
| tpg_s_pattern(&vsen->tpg, ctrl->val); |
| break; |
| case V4L2_CID_HFLIP: |
| tpg_s_hflip(&vsen->tpg, ctrl->val); |
| break; |
| case V4L2_CID_VFLIP: |
| tpg_s_vflip(&vsen->tpg, ctrl->val); |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = { |
| .s_ctrl = vimc_sen_s_ctrl, |
| }; |
| |
| static void vimc_sen_comp_unbind(struct device *comp, struct device *master, |
| void *master_data) |
| { |
| struct vimc_ent_device *ved = dev_get_drvdata(comp); |
| struct vimc_sen_device *vsen = |
| container_of(ved, struct vimc_sen_device, ved); |
| |
| vimc_ent_sd_unregister(ved, &vsen->sd); |
| v4l2_ctrl_handler_free(&vsen->hdl); |
| tpg_free(&vsen->tpg); |
| kfree(vsen); |
| } |
| |
| /* Image Processing Controls */ |
| static const struct v4l2_ctrl_config vimc_sen_ctrl_class = { |
| .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY, |
| .id = VIMC_CID_VIMC_CLASS, |
| .name = "VIMC Controls", |
| .type = V4L2_CTRL_TYPE_CTRL_CLASS, |
| }; |
| |
| static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = { |
| .ops = &vimc_sen_ctrl_ops, |
| .id = VIMC_CID_TEST_PATTERN, |
| .name = "Test Pattern", |
| .type = V4L2_CTRL_TYPE_MENU, |
| .max = TPG_PAT_NOISE, |
| .qmenu = tpg_pattern_strings, |
| }; |
| |
| static int vimc_sen_comp_bind(struct device *comp, struct device *master, |
| void *master_data) |
| { |
| struct v4l2_device *v4l2_dev = master_data; |
| struct vimc_platform_data *pdata = comp->platform_data; |
| struct vimc_sen_device *vsen; |
| int ret; |
| |
| /* Allocate the vsen struct */ |
| vsen = kzalloc(sizeof(*vsen), GFP_KERNEL); |
| if (!vsen) |
| return -ENOMEM; |
| |
| v4l2_ctrl_handler_init(&vsen->hdl, 4); |
| |
| v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL); |
| v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL); |
| v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, |
| V4L2_CID_VFLIP, 0, 1, 1, 0); |
| v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, |
| V4L2_CID_HFLIP, 0, 1, 1, 0); |
| vsen->sd.ctrl_handler = &vsen->hdl; |
| if (vsen->hdl.error) { |
| ret = vsen->hdl.error; |
| goto err_free_vsen; |
| } |
| |
| /* Initialize ved and sd */ |
| ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev, |
| pdata->entity_name, |
| MEDIA_ENT_F_CAM_SENSOR, 1, |
| (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE}, |
| &vimc_sen_ops); |
| if (ret) |
| goto err_free_hdl; |
| |
| dev_set_drvdata(comp, &vsen->ved); |
| vsen->dev = comp; |
| |
| /* Initialize the frame format */ |
| vsen->mbus_format = fmt_default; |
| |
| /* Initialize the test pattern generator */ |
| tpg_init(&vsen->tpg, vsen->mbus_format.width, |
| vsen->mbus_format.height); |
| ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH); |
| if (ret) |
| goto err_unregister_ent_sd; |
| |
| return 0; |
| |
| err_unregister_ent_sd: |
| vimc_ent_sd_unregister(&vsen->ved, &vsen->sd); |
| err_free_hdl: |
| v4l2_ctrl_handler_free(&vsen->hdl); |
| err_free_vsen: |
| kfree(vsen); |
| |
| return ret; |
| } |
| |
| static const struct component_ops vimc_sen_comp_ops = { |
| .bind = vimc_sen_comp_bind, |
| .unbind = vimc_sen_comp_unbind, |
| }; |
| |
| static int vimc_sen_probe(struct platform_device *pdev) |
| { |
| return component_add(&pdev->dev, &vimc_sen_comp_ops); |
| } |
| |
| static int vimc_sen_remove(struct platform_device *pdev) |
| { |
| component_del(&pdev->dev, &vimc_sen_comp_ops); |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id vimc_sen_driver_ids[] = { |
| { |
| .name = VIMC_SEN_DRV_NAME, |
| }, |
| { } |
| }; |
| |
| static struct platform_driver vimc_sen_pdrv = { |
| .probe = vimc_sen_probe, |
| .remove = vimc_sen_remove, |
| .id_table = vimc_sen_driver_ids, |
| .driver = { |
| .name = VIMC_SEN_DRV_NAME, |
| }, |
| }; |
| |
| module_platform_driver(vimc_sen_pdrv); |
| |
| MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids); |
| |
| MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor"); |
| MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>"); |
| MODULE_LICENSE("GPL"); |