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- /****************************************************************************
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2020 VeriSilicon Holdings Co., Ltd.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- *****************************************************************************
- *
- * The GPL License (GPL)
- *
- * Copyright (c) 2020 VeriSilicon Holdings Co., Ltd.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program;
- *
- *****************************************************************************
- *
- * Note: This software is released under dual MIT and GPL licenses. A
- * recipient may use this file under the terms of either the MIT license or
- * GPL License. If you wish to use only one license not the other, you can
- * indicate your decision by deleting one of the above license notices in your
- * version of this file.
- *
- *****************************************************************************/
- #include <linux/delay.h>
- #include <linux/clk.h>
- #include <linux/io.h>
- #include <linux/module.h>
- #include <linux/proc_fs.h>
- #include <linux/debugfs.h>
- #include <linux/of_device.h>
- #include <linux/sched_clock.h>
- #include <linux/videodev2.h>
- #include <media/v4l2-ctrls.h>
- #include <media/v4l2-subdev.h>
- #include <media/v4l2-device.h>
- #include <media/v4l2-ioctl.h>
- #include <media/v4l2-event.h>
- #include <media/media-entity.h>
- #include <uapi/linux/media-bus-format.h>
- #include <linux/pm_runtime.h>
- #include "dwe_driver.h"
- #include "dwe_ioctl.h"
- #define DEVICE_NAME "vvcam-dwe"
- int dwe_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub)
- {
- return v4l2_event_subscribe(fh, sub, 2, NULL);
- }
- int dwe_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub)
- {
- return v4l2_event_unsubscribe(fh, sub);
- }
- #ifdef CONFIG_COMPAT
- static long dwe_ioctl_compat(struct v4l2_subdev *sd,
- unsigned int cmd, void *arg)
- {
- struct dwe_device *dwe_dev = v4l2_get_subdevdata(sd);
- return dwe_priv_ioctl(&dwe_dev->ic_dev, cmd, arg);
- }
- long dwe_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
- {
- return dwe_ioctl_compat(sd, cmd, arg);
- }
- #else /* CONFIG_COMPAT */
- long dwe_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
- {
- struct dwe_device *dwe_dev = v4l2_get_subdevdata(sd);
- return dwe_priv_ioctl(&dwe_dev->ic_dev, cmd, arg);
- }
- #endif /* CONFIG_COMPAT */
- static int dwe_enable_clocks(struct dwe_device *dwe_dev)
- {
- int ret;
- ret = clk_prepare_enable(dwe_dev->clk_core);
- if (ret)
- return ret;
- ret = clk_prepare_enable(dwe_dev->clk_axi);
- if (ret)
- goto disable_clk_core;
- ret = clk_prepare_enable(dwe_dev->clk_ahb);
- if (ret)
- goto disable_clk_axi;
- return 0;
- disable_clk_axi:
- clk_disable_unprepare(dwe_dev->clk_axi);
- disable_clk_core:
- clk_disable_unprepare(dwe_dev->clk_core);
- return ret;
- }
- static void dwe_disable_clocks(struct dwe_device *dwe_dev)
- {
- clk_disable_unprepare(dwe_dev->clk_ahb);
- clk_disable_unprepare(dwe_dev->clk_axi);
- clk_disable_unprepare(dwe_dev->clk_core);
- }
- int dwe_set_stream(struct v4l2_subdev *sd, int enable)
- {
- return 0;
- }
- static struct v4l2_subdev_core_ops dwe_v4l2_subdev_core_ops = {
- .ioctl = dwe_ioctl,
- .subscribe_event = dwe_subscribe_event,
- .unsubscribe_event = dwe_unsubscribe_event,
- };
- static struct v4l2_subdev_video_ops dwe_v4l2_subdev_video_ops = {
- .s_stream = dwe_set_stream,
- };
- static struct v4l2_subdev_ops dwe_v4l2_subdev_ops = {
- .core = &dwe_v4l2_subdev_core_ops,
- .video = &dwe_v4l2_subdev_video_ops,
- };
- static int dwe_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
- {
- pm_runtime_get_sync(sd->dev);
- return 0;
- }
- static int dwe_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
- {
- pm_runtime_put_sync(sd->dev);
- return 0;
- }
- static struct v4l2_subdev_internal_ops dwe_internal_ops = {
- .open = dwe_open,
- .close = dwe_close,
- };
- int dwe_hw_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct dwe_device *dwe_dev;
- struct resource *mem_res;
- int rc = 0;
- pr_info("enter %s\n", __func__);
- dwe_dev = kzalloc(sizeof(struct dwe_device), GFP_KERNEL);
- if (!dwe_dev) {
- rc = -ENOMEM;
- goto end;
- }
- dwe_dev->clk_core = devm_clk_get(dev, "core");
- if (IS_ERR(dwe_dev->clk_core)) {
- rc = PTR_ERR(dwe_dev->clk_core);
- dev_err(dev, "can't get core clock: %d\n", rc);
- return rc;
- }
- dwe_dev->clk_axi = devm_clk_get(dev, "axi");
- if (IS_ERR(dwe_dev->clk_axi)) {
- rc = PTR_ERR(dwe_dev->clk_axi);
- dev_err(dev, "can't get axi clock: %d\n", rc);
- return rc;
- }
- dwe_dev->clk_ahb = devm_clk_get(dev, "ahb");
- if (IS_ERR(dwe_dev->clk_ahb)) {
- rc = PTR_ERR(dwe_dev->clk_ahb);
- dev_err(dev, "can't get ahb clock: %d\n", rc);
- return rc;
- }
- dwe_dev->sd.internal_ops = &dwe_internal_ops;
- v4l2_subdev_init(&dwe_dev->sd, &dwe_v4l2_subdev_ops);
- snprintf(dwe_dev->sd.name, sizeof(dwe_dev->sd.name), DEVICE_NAME);
- dwe_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
- dwe_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
- dwe_dev->sd.owner = THIS_MODULE;
- dwe_dev->sd.dev = &pdev->dev;
- v4l2_set_subdevdata(&dwe_dev->sd, dwe_dev);
- dwe_dev->vd = kzalloc(sizeof(*dwe_dev->vd), GFP_KERNEL);
- if (WARN_ON(!dwe_dev->vd)) {
- rc = -ENOMEM;
- goto end;
- }
- rc = v4l2_device_register(&(pdev->dev), dwe_dev->vd);
- if (WARN_ON(rc < 0))
- goto end;
- rc = v4l2_device_register_subdev(dwe_dev->vd, &dwe_dev->sd);
- if (rc) {
- pr_err("failed to register subdev %d\n", rc);
- goto end;
- }
- mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- dwe_dev->ic_dev.base = devm_ioremap_resource(&pdev->dev, mem_res);
- if (IS_ERR(dwe_dev->ic_dev.base)) {
- pr_err("failed to get ioremap resource.\n");
- goto end;
- }
- #ifdef DWE_REG_RESET
- dwe_dev->ic_dev.reset = ioremap(DWE_REG_RESET, 4);
- #endif
- platform_set_drvdata(pdev, dwe_dev);
- rc = v4l2_device_register_subdev_nodes(dwe_dev->vd);
- pm_runtime_enable(&pdev->dev);
- pr_info("vvcam dewarp driver probed\n");
- return 0;
- end:
- return rc;
- }
- int dwe_hw_remove(struct platform_device *pdev)
- {
- struct dwe_device *dwe = platform_get_drvdata(pdev);
- pr_info("enter %s\n", __func__);
- if (!dwe)
- return -1;
- pm_runtime_disable(&pdev->dev);
- v4l2_device_unregister_subdev(&dwe->sd);
- v4l2_device_disconnect(dwe->vd);
- v4l2_device_put(dwe->vd);
- #ifdef DWE_REG_RESET
- iounmap(dwe->ic_dev.reset);
- #endif
- kfree(dwe);
- pr_info("vvcam dewarp driver removed\n");
- return 0;
- }
- static int dwe_system_suspend(struct device *dev)
- {
- return pm_runtime_force_suspend(dev);
- }
- static int dwe_system_resume(struct device *dev)
- {
- int ret;
- ret = pm_runtime_force_resume(dev);
- if (ret < 0) {
- dev_err(dev, "force resume %s failed!\n", dev_name(dev));
- return ret;
- }
- return 0;
- }
- static int dwe_runtime_suspend(struct device *dev)
- {
- struct dwe_device *dwe_dev = dev_get_drvdata(dev);
- dwe_disable_clocks(dwe_dev);
- return 0;
- }
- static int dwe_runtime_resume(struct device *dev)
- {
- struct dwe_device *dwe_dev = dev_get_drvdata(dev);
- dwe_enable_clocks(dwe_dev);
- return 0;
- }
- static const struct dev_pm_ops dwe_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(dwe_system_suspend, dwe_system_resume)
- SET_RUNTIME_PM_OPS(dwe_runtime_suspend, dwe_runtime_resume, NULL)
- };
- static const struct of_device_id dwe_of_match[] = {
- {.compatible = DWE_COMPAT_NAME,},
- { /* sentinel */ },
- };
- MODULE_DEVICE_TABLE(of, dwe_of_match);
- static struct platform_driver viv_dwe_driver = {
- .probe = dwe_hw_probe,
- .remove = dwe_hw_remove,
- .driver = {
- .name = DWE_DEVICE_NAME,
- .owner = THIS_MODULE,
- .of_match_table = dwe_of_match,
- .pm = &dwe_pm_ops,
- }
- };
- static int __init viv_dwe_init_module(void)
- {
- int ret = 0;
- pr_info("enter %s\n", __func__);
- ret = platform_driver_register(&viv_dwe_driver);
- if (ret)
- pr_err("register platform driver failed.\n");
- return ret;
- }
- static void __exit viv_dwe_exit_module(void)
- {
- pr_info("enter %s\n", __func__);
- platform_driver_unregister(&viv_dwe_driver);
- }
- module_init(viv_dwe_init_module);
- module_exit(viv_dwe_exit_module);
- MODULE_AUTHOR("zhiye.yin@verisilicon.com");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("Dewarp");
- MODULE_VERSION("1.0");
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