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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* vimc-lens.c Virtual Media Controller Driver
* Copyright (C) 2022 Google, Inc
* Author: yunkec@google.com (Yunke Cao)
*/
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-subdev.h>
#include "vimc-common.h"
#define VIMC_LENS_MAX_FOCUS_POS 1023
#define VIMC_LENS_MAX_FOCUS_STEP 1
struct vimc_lens_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
u32 focus_absolute;
};
static const struct v4l2_subdev_core_ops vimc_lens_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_ops vimc_lens_ops = {
.core = &vimc_lens_core_ops
};
static int vimc_lens_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vimc_lens_device *vlens =
container_of(ctrl->handler, struct vimc_lens_device, hdl);
if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
vlens->focus_absolute = ctrl->val;
return 0;
}
return -EINVAL;
}
static const struct v4l2_ctrl_ops vimc_lens_ctrl_ops = {
.s_ctrl = vimc_lens_s_ctrl,
};
static struct vimc_ent_device *vimc_lens_add(struct vimc_device *vimc,
const char *vcfg_name)
{
struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
struct vimc_lens_device *vlens;
int ret;
/* Allocate the vlens struct */
vlens = kzalloc(sizeof(*vlens), GFP_KERNEL);
if (!vlens)
return ERR_PTR(-ENOMEM);
v4l2_ctrl_handler_init(&vlens->hdl, 1);
v4l2_ctrl_new_std(&vlens->hdl, &vimc_lens_ctrl_ops,
V4L2_CID_FOCUS_ABSOLUTE, 0,
VIMC_LENS_MAX_FOCUS_POS, VIMC_LENS_MAX_FOCUS_STEP, 0);
vlens->sd.ctrl_handler = &vlens->hdl;
if (vlens->hdl.error) {
ret = vlens->hdl.error;
goto err_free_vlens;
}
vlens->ved.dev = vimc->mdev.dev;
ret = vimc_ent_sd_register(&vlens->ved, &vlens->sd, v4l2_dev,
vcfg_name, MEDIA_ENT_F_LENS, 0,
NULL, &vimc_lens_ops);
if (ret)
goto err_free_hdl;
return &vlens->ved;
err_free_hdl:
v4l2_ctrl_handler_free(&vlens->hdl);
err_free_vlens:
kfree(vlens);
return ERR_PTR(ret);
}
static void vimc_lens_release(struct vimc_ent_device *ved)
{
struct vimc_lens_device *vlens =
container_of(ved, struct vimc_lens_device, ved);
v4l2_ctrl_handler_free(&vlens->hdl);
media_entity_cleanup(vlens->ved.ent);
kfree(vlens);
}
struct vimc_ent_type vimc_lens_type = {
.add = vimc_lens_add,
.release = vimc_lens_release
};
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