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- /*
- * Copyright (C) 2021 Alibaba Group Holding Limited
- * Author: Shenwuyi <shenwuyi.swy@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 <linux/poll.h>
- #include <linux/pm_runtime.h>
- #include "vi_pre.h"
- #include "vi_pre_ioctl.h"
- static unsigned int vi_pre_major = 0;
- static unsigned int vi_pre_minor = 0;
- struct class *vi_pre_class;
- static unsigned int device_register_index = 0;
- static int vipre_runtime_suspend(struct device *dev)
- {
- struct vi_pre_dev *pdriver_dev = dev_get_drvdata(dev);
- pr_info("enter %s\n", __func__);
- if (pdriver_dev->aclk!= NULL) {
- clk_disable_unprepare(pdriver_dev->aclk);
- }
- if (pdriver_dev->pclk != NULL) {
- clk_disable_unprepare(pdriver_dev->pclk);
- }
- if (pdriver_dev->pixclk!= NULL) {
- clk_disable_unprepare(pdriver_dev->pixclk);
- }
- pr_info("exit %s\n", __func__);
- return 0;
- }
- static int vipre_runtime_resume(struct device *dev)
- {
- int ret = 0;
- struct vi_pre_dev *pdriver_dev = dev_get_drvdata(dev);
- if (pdriver_dev->pclk != NULL) {
- ret = clk_prepare_enable(pdriver_dev->pclk);
- if (ret < 0) {
- dev_err(dev, "could not prepare or enable csi pclk\n");
- clk_disable_unprepare(pdriver_dev->pclk);
- }
- }
- if (pdriver_dev->pixclk!= NULL) {
- ret = clk_prepare_enable(pdriver_dev->pixclk);
- if (ret < 0) {
- dev_err(dev, "could not prepare or enable pixclk\n");
- clk_disable_unprepare(pdriver_dev->pixclk);
- }
- }
- if (pdriver_dev->aclk!= NULL) {
- ret = clk_prepare_enable(pdriver_dev->aclk);
- if (ret < 0) {
- dev_err(dev, "could not prepare or enable aclk\n");
- clk_disable_unprepare(pdriver_dev->aclk);
- }
- }
- pr_info("%s Enabled clock\n", __func__);
- return ret;
- }
- static const struct dev_pm_ops vipre_runtime_pm_ops = {
- SET_RUNTIME_PM_OPS(vipre_runtime_suspend, vipre_runtime_resume, NULL)
- };
- static int vi_pre_open(struct inode * inode, struct file * file)
- {
- int ret = 0;
- struct vi_pre_dev *pdriver_dev;
- struct device *dev;
- pr_info("entry %s\n", __func__);
- pdriver_dev = container_of(inode->i_cdev, struct vi_pre_dev, cdev);
- file->private_data = pdriver_dev;
- dev = &pdriver_dev->pdev->dev;
- if (pm_runtime_get_sync(dev)) {
- ret = vipre_runtime_resume(dev);
- if (ret)
- pr_err("fail to resume csi %s %d\n", __func__, __LINE__);
- }
- pr_info("exit %s\n", __func__);
- return 0;
- };
- static long vi_pre_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
- {
- long ret = 0;
- struct vi_pre_dev *pdriver_dev;
- pr_debug("enter %s\n", __func__);
- //printk("%s, %d, vipre_cmd %u\n", __func__, __LINE__, cmd);
- pdriver_dev = file->private_data;
- if (pdriver_dev == NULL) {
- pr_err("%s:file private is null point error\n", __func__);
- return -ENOMEM;
- }
- mutex_lock(&pdriver_dev->mutex);
- ret = vi_pre_priv_ioctl(pdriver_dev, cmd ,(void *)arg);
- mutex_unlock(&pdriver_dev->mutex);
- pr_debug("exit %s\n", __func__);
- return ret;
- };
- static int vi_pre_release(struct inode * inode, struct file * file)
- {
- int ret = 0;
- struct vi_pre_dev *pdriver_dev;
- struct device *dev;
- pr_info("enter %s\n", __func__);
- pdriver_dev = container_of(inode->i_cdev, struct vi_pre_dev, cdev);
- file->private_data = pdriver_dev;
- dev = &pdriver_dev->pdev->dev;
- ret = pm_runtime_put_sync(dev);
- if (ret) {
- pr_info("fail to resume vipre %s %d\n", __func__, __LINE__);
- }
- pr_info("exit %s\n", __func__);
- return 0;
- };
- static int vi_pre_mmap(struct file *pFile, struct vm_area_struct *vma)
- {
- #define img_buf 0xf0000000
- pr_info("enter %s\n", __func__);
- vma->vm_flags |= VM_IO;
- vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP);
- if(remap_pfn_range(vma,
- vma->vm_start,
- img_buf >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot)) {
- return -EAGAIN;
- }
- pr_info("exit %s\n", __func__);
- return 0;
- };
- extern unsigned vi_pre_poll(struct file *file, poll_table *wait);
- struct file_operations vi_pre_fops = {
- .owner = THIS_MODULE,
- .open = vi_pre_open,
- .release = vi_pre_release,
- .unlocked_ioctl = vi_pre_ioctl,
- .mmap = vi_pre_mmap,
- .poll = vi_pre_poll,
- };
- static int vi_pre_probe(struct platform_device *pdev)
- {
- int ret = 0;
- struct vi_pre_dev *pdriver_dev;
- struct resource *mem;
- struct device *dev = NULL;
- pr_info("enter %s\n", __func__);
- dev = &pdev->dev;
- pdev->id = device_register_index;
- if (pdev->id >= VI_PRE_MAXCNT) {
- pr_err("%s:pdev id is %d error\n", __func__, pdev->id);
- return -EINVAL;
- }
- pdriver_dev = devm_kzalloc(&pdev->dev, sizeof(struct vi_pre_dev), GFP_KERNEL);
- if (pdriver_dev == NULL) {
- pr_err("%s:alloc struct vi_pre_dev error\n", __func__);
- return -ENOMEM;
- }
- pr_info("%s:isp[%d]: pdriver_dev =0x%px\n", __func__, pdev->id, pdriver_dev);
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pdriver_dev->reg_base = devm_ioremap_resource(&pdev->dev, mem);
- if (IS_ERR(pdriver_dev->reg_base))
- return PTR_ERR(pdriver_dev->reg_base);
- pr_info("%s:isp[%d]: pdriver_dev->base=0x%px\n", __func__,
- pdev->id, pdriver_dev->reg_base);
- pdriver_dev->id = pdev->id;
- pdriver_dev->pdev = pdev;
- mutex_init(&pdriver_dev->mutex);
- /*parse clk info from dts*/
- pdriver_dev->pclk = devm_clk_get(&pdev->dev, "pclk");
- if (IS_ERR(pdriver_dev->pclk)) {
- dev_err(&pdev->dev, "failed to get pclk");
- pdriver_dev->pclk = NULL;
- }
- pdriver_dev->pixclk = devm_clk_get(&pdev->dev, "pixclk");
- if (IS_ERR(pdriver_dev->pixclk)) {
- dev_err(&pdev->dev, "failed to get pixclk");
- pdriver_dev->pixclk = NULL;
- }
- pdriver_dev->aclk = devm_clk_get(&pdev->dev, "aclk");
- if (IS_ERR(pdriver_dev->aclk)) {
- dev_err(&pdev->dev, "failed to get aclk");
- pdriver_dev->aclk = NULL;
- }
- platform_set_drvdata(pdev, pdriver_dev);
- if (device_register_index == 0) {
- int ret;
- if (vi_pre_major == 0) {
- ret = alloc_chrdev_region(&pdriver_dev->devt, 0, VI_PRE_MAXCNT, VI_PRE_NAME);
- if (ret != 0) {
- pr_err("%s:alloc_chrdev_region error\n", __func__);
- return ret;
- }
- vi_pre_major = MAJOR(pdriver_dev->devt);
- vi_pre_minor = MINOR(pdriver_dev->devt);
- }
- else
- {
- pdriver_dev->devt = MKDEV(vi_pre_major, vi_pre_minor);
- ret = register_chrdev_region(pdriver_dev->devt, VI_PRE_MAXCNT, VI_PRE_NAME);
- if (ret) {
- pr_err("%s:register_chrdev_region error\n", __func__);
- return ret;
- }
- }
- vi_pre_class = class_create(THIS_MODULE, VI_PRE_NAME);
- if (IS_ERR(vi_pre_class)) {
- pr_err("%s[%d]:class_create error!\n", __func__, __LINE__);
- return -EINVAL;
- }
- }
- pdriver_dev->devt = MKDEV(vi_pre_major, vi_pre_minor + pdev->id);
- cdev_init(&pdriver_dev->cdev, &vi_pre_fops);
- ret = cdev_add(&pdriver_dev->cdev, pdriver_dev->devt, 1);
- if ( ret ) {
- pr_err("%s[%d]:cdev_add error!\n", __func__, __LINE__);
- return ret;
- }
- pdriver_dev->class = vi_pre_class;
- device_create(pdriver_dev->class, NULL, pdriver_dev->devt,
- pdriver_dev, "%s%d", VI_PRE_NAME, pdev->id);
- pdriver_dev->irq = platform_get_irq(pdev, 0);
- if (pdriver_dev->irq < 0) {
- dev_err(dev, "vipre get irq error: %d\n", pdriver_dev->id);
- ret = pdriver_dev->irq;
- goto end;
- }
- spin_lock_init(&pdriver_dev->slock);
- /*
- if (device_property_read_bool(dev, "vi_pre_irq_en")) {
- ret = devm_request_irq(dev, pdriver_dev->irq,
- vi_pre_irq, IRQF_SHARED,
- dev_name(dev), pdriver_dev);
- if (ret) {
- dev_err(dev, "irq vipre failed\n");
- goto end;
- }
- }
- */
- pm_runtime_enable(&pdev->dev);
- ret = vipre_runtime_resume(&pdev->dev);
- if (ret < 0) {
- dev_err(&pdev->dev, "fail to resume vipre\n");
- }
- vipre_runtime_suspend(&pdev->dev);
- if (ret < 0) {
- dev_err(&pdev->dev, "fail to suspend vipre\n");
- }
- device_register_index++;
- pr_info("exit %s:[%d]\n", __func__, pdev->id);
- end:
- return ret;
- }
- static int vi_pre_remove(struct platform_device *pdev)
- {
- struct vi_pre_dev *pdriver_dev;
- pr_info("enter %s\n", __func__);
- device_register_index--;
- pdriver_dev = platform_get_drvdata(pdev);
- cdev_del(&pdriver_dev->cdev);
- device_destroy(pdriver_dev->class, pdriver_dev->devt);
- unregister_chrdev_region(pdriver_dev->devt, VI_PRE_MAXCNT);
- if (device_register_index == 0) {
- class_destroy(pdriver_dev->class);
- }
- devm_kfree(&pdev->dev, pdriver_dev);
- return 0;
- }
- static const struct of_device_id vi_pre_of_match_table[] = {
- { .compatible = "thead,vi_pre", },
- { },
- };
- static struct platform_driver vi_pre_driver = {
- .probe = vi_pre_probe,
- .remove = vi_pre_remove,
- .driver = {
- .owner = THIS_MODULE,
- .name = VI_PRE_DEV_NAME,
- .of_match_table = vi_pre_of_match_table,
- .pm = &vipre_runtime_pm_ops,
- },
- };
- static int __init vi_pre_init_module(void)
- {
- int ret = 0;
- pr_info("enter %s\n", __func__);
- ret = platform_driver_register(&vi_pre_driver);
- if (ret) {
- pr_err("register platform driver failed.\n");
- return ret;
- }
- pr_info("exit %s\n", __func__);
- return ret;
- }
- static void __exit vi_pre_exit_module(void)
- {
- pr_info("enter %s\n", __func__);
- platform_driver_unregister(&vi_pre_driver);
- pr_info("exit %s\n", __func__);
- }
- module_init(vi_pre_init_module);
- module_exit(vi_pre_exit_module);
- MODULE_DESCRIPTION("VI_PRE");
- MODULE_LICENSE("GPL");
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