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- /*
- * Copyright (C) 2021 Alibaba Group Holding Limited
- * Author: liuyitong <yitong.lyt@alibaba-inc.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #include <asm/io.h>
- #include <linux/cdev.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <linux/delay.h>
- #include <linux/clk.h>
- #include <linux/io.h>
- #include <linux/mm.h>
- #include <linux/timer.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/ioctl.h>
- #include <linux/poll.h>
- #include <linux/workqueue.h>
- #include <linux/slab.h>
- #include <linux/proc_fs.h>
- #include <linux/debugfs.h>
- #include <linux/miscdevice.h>
- #include <linux/uaccess.h>
- #include <linux/interrupt.h>
- #include <linux/of.h>
- #include "video.h"
- #include "video_ioctl.h"
- #define VIDEO_DRIVER_NAME "video"
- #define VIDEO_DRIVER_MAXCNT 100
- static struct class *video_driver_class;
- static unsigned int video_driver_major = 0;
- static unsigned int video_driver_minor = 0;
- static unsigned int device_register_index = 0;
- #define check_retval(x)\
- do {\
- if ((x))\
- return -EIO;\
- } while (0)
- static unsigned int video_poll(struct file * filp, poll_table *wait)
- {
- return 0;
- }
- void video_work(struct work_struct *work)
- {
- }
- irqreturn_t video_irq(int irq, void *dev_id)
- {
- video_info("enter %s\n", __func__);
- return IRQ_HANDLED;
- }
- static int video_open(struct inode * inode, struct file * file)
- {
- struct video_drvdata *drvdata;
- drvdata = container_of(inode->i_cdev, struct video_drvdata, cdev);
- file->private_data = drvdata;
- return 0;
- };
- static int video_get_pipelines(struct video_drvdata *drvdata, void *__user args)
- {
- pipline_t *usr_pip = (pipline_t *)args;
- pipline_t *cam_pip = drvdata->piplines;
- check_retval(copy_to_user(usr_pip, cam_pip, sizeof(pipline_t) * drvdata->pipline_num));
- video_info("%s, %d, pipeline nmu: %d\n", __func__, __LINE__, drvdata->pipline_num);
- return 0;
- }
- static int video_get_pipelines_num (struct video_drvdata *drvdata, void *__user args)
- {
- check_retval(copy_to_user(args, &drvdata->pipline_num, sizeof(int)));
- return 0;
- }
- static int video_set_path_type(struct video_drvdata *drvdata, void *__user args)
- {
- pathtype_set_t pathtype_set;
- check_retval(copy_from_user(&pathtype_set, args, sizeof(pathtype_set_t)));
- video_info("VIDEO_SET_PATH_TYPE pipeline=%d sensor=%s path_type%d \n", pathtype_set.pipeline_id , pathtype_set.sensor_name, pathtype_set.path_type);
- return 0;
- }
- static int video_get_mem_pool_region_id(struct video_drvdata *drvdata, void *__user args)
- {
- check_retval(copy_to_user(args, &drvdata->vi_mem_pool_region_id, sizeof(int)));
- return 0;
- }
- static long video_set_state(struct video_drvdata *drvdata,int *arg)
- {
- int ops;
- check_retval(copy_from_user(&ops,arg,sizeof(int)));
- if(ops ==DEVICE_OPERATION_ACTIVE)
- {
- if(drvdata->actived == true)
- {
- dev_warn(drvdata->dev,"%s,can't ative,device already active by other process(%d)\n",__func__, current->tgid);
- return (-EBUSY);
- }else
- {
- drvdata->actived =true;
- drvdata->actived_owner = current->tgid;
- dev_dbg(drvdata->dev,"%s,actived by process %d\n",__func__,current->tgid);
- }
- }
- else if(ops ==DEVICE_OPERATION_DEACTIVE)
- {
- if(drvdata->actived == false)
- {
- dev_warn(drvdata->dev,"%s,can't deative,device is not atived\n",__func__);
- return (-EPERM);
- }else
- {
- if(drvdata->actived_owner != current->tgid)
- {
- dev_warn(drvdata->dev,"%s,can't deative,device is active by other process(%d)\n",__func__, current->tgid);
- return (-EPERM);
- }
- drvdata->actived =false;
- drvdata->actived_owner = -1;
- dev_dbg(drvdata->dev,"%s de-active",__func__);
- }
- }else
- {
- dev_warn(drvdata->dev,"%s,un-defined ops\n",__func__);
- return (-EPERM);
- }
- return 0;
- }
- static long video_get_state(struct video_drvdata *drvdata,int *arg)
- {
- int ops;
- ops = drvdata->actived==true?DEVICE_OPERATION_ACTIVE:DEVICE_OPERATION_DEACTIVE;
- check_retval(copy_to_user(arg, &ops, sizeof(int)));
- return 0;
- }
- static long video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
- {
- long ret = 0;
- struct video_drvdata *drvdata;
- drvdata = file->private_data;
- if (drvdata == NULL) {
- video_err("%s:file private is null point error\n", __func__);
- return -ENOMEM;
- }
- mutex_lock(&drvdata->mutex);
- switch (cmd) {
- case VIDEO_GET_PIPLANES:
- ret = video_get_pipelines(drvdata, (void *)arg);
- break;
- case VIDEO_GET_PIPLANES_NUM:
- ret = video_get_pipelines_num(drvdata, (void *)arg);
- break;
- case VIDEO_SET_PATH_TYPE:
- ret = video_set_path_type(drvdata, (void *)arg);
- break;
- case VIDEO_GET_MEM_POOL_REGION_ID:
- ret = video_get_mem_pool_region_id(drvdata, (void *)arg);
- break;
- case VIDEO_SET_DEVICE_STATE:
- ret = video_set_state(drvdata, (void *)arg);
- break;
- case VIDEO_GET_DEVICE_STATE:
- ret = video_get_state(drvdata, (void *)arg);
- break;
- default:
- ret = -EPERM;
- video_err("%s: unsupported command %d\n", __func__, cmd);
- break;
- }
- mutex_unlock(&drvdata->mutex);
- return ret;
- };
- static int video_release(struct inode * inode, struct file * file)
- {
- struct video_drvdata *drvdata;
- drvdata = container_of(inode->i_cdev, struct video_drvdata, cdev);
- mutex_lock(&drvdata->mutex);
- if(drvdata->actived == true &&
- drvdata->actived_owner == current->tgid)
- {
- drvdata->actived = false;
- drvdata->actived_owner = -1;
- dev_dbg(drvdata->dev,"%s de-active device\n",__func__);
- }
- mutex_unlock(&drvdata->mutex);
- return 0;
- };
- static int video_mmap(struct file *pFile, struct vm_area_struct *vma)
- {
- video_info("enter %s\n", __func__);
- return 0;
- };
- struct file_operations video_fops = {
- .owner = THIS_MODULE,
- .open = video_open,
- .release = video_release,
- .unlocked_ioctl = video_ioctl,
- .mmap = video_mmap,
- .poll = video_poll,
- };
- static int video_press_pipline(pipline_t *pipline, struct fwnode_handle *pip_node)
- {
- int ret = 0;
- const char *dev_name;
- const char *path_name;
- struct fwnode_handle *nodes;
- sub_dev_info_t *sub_dev = pipline->sub_dev;
- fwnode_for_each_available_child_node(pip_node, nodes) {
- ret = fwnode_property_read_string(nodes, "subdev_name", &dev_name);
- if (ret != 0) {
- video_err("dts press error!!!!!, %s, %d\n", __func__, __LINE__);
- return -1;
- }
- strcpy(sub_dev->name, dev_name);
- ret = fwnode_property_read_u32_array(nodes, "idx", &sub_dev->idx, 1);
- if (ret != 0) {
- video_err("dts press device :%s error!!!!!, %d, %s\n", __func__, __LINE__,dev_name);
- return -1;
- }
- ret = fwnode_property_read_string(nodes, "path_type", &path_name);
- if (ret != 0) {
- video_err("%s, %d, dts parse %s->%s error!!!!!\n", __func__, __LINE__, dev_name, path_name);
- return -1;
- }
- video_info("%s, %d, dev: %s->%s !!!!!\n", __func__, __LINE__, dev_name, path_name);
- sub_dev->path = vedio_get_path_type(dev_name, path_name);
- if(sub_dev->path < 0) {
- video_err("%s, %d, %s, parse path(%s) error!!!!!\n", __func__, __LINE__, dev_name, path_name);
- return -1;
- }
- video_info("subdev:%s-%d,path:(%s,%d)\n",dev_name,sub_dev->idx, path_name,sub_dev->path);
- ret = video_subdev_press_dts(nodes, sub_dev);
- if (ret != 0) {
- video_err("dts press error!!!!!, %s, %d\n", __func__, __LINE__);
- return -1;
- }
- sub_dev++;
- pipline->sub_dev_num++;
- }
- return 0;
- }
- static int video_press_dts(struct platform_device *pdev)
- {
- int ret = 0;
- struct device *dev = &pdev->dev;
- struct fwnode_handle *child;
- struct video_drvdata *drvdata;
- pipline_t *pipline;
- int pool_region_id;
- drvdata = platform_get_drvdata(pdev);
- pipline = drvdata->piplines;
- //if (device_property_read_u32(&(pdev->dev), "vi_mem_pool_region", &pool_region_id) != 0) {
- if (of_property_read_s32(dev->of_node, "vi_mem_pool_region", &pool_region_id) != 0) {
- video_warn("%s, dev(%s) can't get vi_mem_pool_region id from dts, set to default -1(cma)\n",
- __func__, pdev->name);
- pool_region_id = -1;
- }
- drvdata->vi_mem_pool_region_id = pool_region_id;
- device_for_each_child_node(dev, child) {
- video_info("pipleline(%d):",drvdata->pipline_num);
- ret = video_press_pipline(pipline, child);
- if (ret != 0) {
- video_err("%s, %d, dts press pipe:%d error!\n", __func__, __LINE__, drvdata->pipline_num);
- return -1;
- }
- pipline++;
- drvdata->pipline_num++;
- }
- return 0;
- }
- static int video_probe(struct platform_device *pdev)
- {
- int ret = 0;
- struct video_drvdata *drvdata;
- struct device_node *np = pdev->dev.of_node;
- video_info("enter %s\n", __func__);
- pdev->id = of_alias_get_id(np, "viv_video");
- video_info("%s:pdev id is %d\n", __func__, pdev->id);
- if (pdev->id >= VIDEO_DRIVER_MAXCNT) {
- video_err("%s:pdev id is %d error\n", __func__, pdev->id);
- return -EINVAL;
- }
- drvdata = devm_kzalloc(&pdev->dev,sizeof(struct video_drvdata), GFP_KERNEL);
- if (drvdata == NULL) {
- video_err("%s:alloc struct drvdata error\n", __func__);
- return -ENOMEM;
- }
- drvdata->device_idx = pdev->id;
- drvdata->actived = false;
- drvdata->actived_owner = -1;
- drvdata->dev = &pdev->dev;
- mutex_init(&drvdata->mutex);
- platform_set_drvdata(pdev, drvdata);
- if (device_register_index == 0) {
- if (video_driver_major == 0) {
- ret = alloc_chrdev_region(&drvdata->devt, 0, VIDEO_DRIVER_MAXCNT, VIDEO_DRIVER_NAME);
- if (ret != 0) {
- video_err("%s:alloc_chrdev_region error\n", __func__);
- return ret;
- }
- video_driver_major = MAJOR(drvdata->devt);
- video_driver_minor = MINOR(drvdata->devt);
- } else {
- drvdata->devt = MKDEV(video_driver_major, video_driver_minor);
- ret = register_chrdev_region(drvdata->devt, VIDEO_DRIVER_MAXCNT, VIDEO_DRIVER_NAME);
- if (ret) {
- video_err("%s:register_chrdev_region error\n", __func__);
- return ret;
- }
- }
- video_driver_class = class_create(THIS_MODULE, VIDEO_DRIVER_NAME);
- if (IS_ERR(video_driver_class)) {
- video_err("%s[%d]:class_create error!\n", __func__, __LINE__);
- return -EINVAL;
- }
- }
- drvdata->devt = MKDEV(video_driver_major, video_driver_minor + pdev->id);
- cdev_init(&drvdata->cdev, &video_fops);
- ret = cdev_add(&drvdata->cdev, drvdata->devt, 1);
- if ( ret ) {
- video_err("%s[%d]:cdev_add error!\n", __func__, __LINE__);
- return ret;
- } else {
- video_info("%s[%d]:cdev_add OK, major=%d, minor=%d\n", __func__, __LINE__,
- video_driver_major, video_driver_minor + pdev->id);
- }
- drvdata->class = video_driver_class;
- device_create(drvdata->class, NULL, drvdata->devt,
- drvdata, "%s%d", VIDEO_DRIVER_NAME, pdev->id);
- ret = video_press_dts(pdev);
- if (ret) {
- video_err("%s[%d]:dts error!\n", __func__, __LINE__);
- return ret;
- }
- video_create_capabilities_sysfs(pdev);
- device_register_index++;
- video_info("exit %s:[%s%d]\n", __func__, VIDEO_DRIVER_NAME, pdev->id);
- return 0;
- }
- static int video_remove(struct platform_device *pdev)
- {
- struct video_drvdata *drvdata;
- video_info("enter %s\n", __func__);
- device_register_index--;
- drvdata = platform_get_drvdata(pdev);
- cdev_del(&drvdata->cdev);
- device_destroy(drvdata->class, drvdata->devt);
- unregister_chrdev_region(drvdata->devt, VIDEO_DRIVER_MAXCNT);
- mutex_destroy(&drvdata->mutex);
- video_remove_capabilities_sysfs(pdev);
- if (device_register_index == 0) {
- class_destroy(drvdata->class);
- }
- devm_kfree(&pdev->dev, drvdata);
- video_info("exit %s\n", __func__);
- return 0;
- }
- static const struct of_device_id video_of_match[] = {
- { .compatible = "thead,video", },
- { /* sentinel */ },
- };
- static struct platform_driver video_driver = {
- .probe = video_probe,
- .remove = video_remove,
- .driver = {
- .name = VIDEO_DRIVER_NAME,
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(video_of_match),
- }
- };
- static int __init video_init_module(void)
- {
- int ret = 0;
- video_info("enter %s\n", __func__);
- ret = platform_driver_register(&video_driver);
- if (ret) {
- video_err("register platform driver failed.\n");
- return ret;
- }
- return ret;
- }
- static void __exit video_exit_module(void)
- {
- video_info("enter %s\n", __func__);
- platform_driver_unregister(&video_driver);
- }
- module_init(video_init_module);
- module_exit(video_exit_module);
- MODULE_AUTHOR("Liu Yitong");
- MODULE_DESCRIPTION("THEAD-VIDEO");
- MODULE_LICENSE("GPL");
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