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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/pm_runtime.h>
- #include <linux/of.h>
- #include "bm_printk.h"
- #include "bm_csi_ioctl.h"
- #include "bm_csi_hw.h"
- #include "bm_csi_dphy.h"
- #define BM_DRIVER_NAME "bm_csi"
- #define BM_DRIVER_MAXCNT 3
- static struct class *bm_driver_class;
- static unsigned int bm_driver_major = 0;
- static unsigned int bm_driver_minor = 0;
- static unsigned int device_register_index = 0;
- #define check_retval(x)\
- do {\
- if ((x))\
- return -EIO;\
- } while (0)
- static unsigned int bm_csi_poll(struct file * filp, poll_table *wait)
- {
- return 0;
- }
- void bm_csi_work(struct work_struct *work)
- {
- }
- irqreturn_t bm_csi_irq(int irq, void *dev_id)
- {
- bm_info("enter %s\n", __func__);
- return IRQ_HANDLED;
- }
- static int bm_csi_runtime_suspend(struct device *dev)
- {
- struct bm_csi_drvdata *pdriver_dev = dev_get_drvdata(dev);
- dev_info(dev, "enter %s\n", __func__);
- if (pdriver_dev->pclk != NULL) {
- clk_disable_unprepare(pdriver_dev->pclk);
- }
- if (pdriver_dev->pixclk!= NULL) {
- clk_disable_unprepare(pdriver_dev->pixclk);
- }
- if (pdriver_dev->cfg_clk0!= NULL) {
- clk_disable_unprepare(pdriver_dev->cfg_clk0);
- }
- if (pdriver_dev->cfg_clk1!= NULL) {
- clk_disable_unprepare(pdriver_dev->cfg_clk1);
- }
- if (pdriver_dev->cfg_clk2!= NULL) {
- clk_disable_unprepare(pdriver_dev->cfg_clk2);
- }
- pr_info("exit %s\n", __func__);
- return 0;
- }
- static int bm_csi_runtime_resume(struct device *dev)
- {
- int ret = 0;
- struct bm_csi_drvdata *pdriver_dev = dev_get_drvdata(dev);
- dev_info(dev, "enter %s\n", __func__);
- 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);
- return -1;
- }
- }
- 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);
- return -1;
- }
- }
- if (pdriver_dev->cfg_clk0 != NULL) {
- ret = clk_prepare_enable(pdriver_dev->cfg_clk0);
- if (ret < 0) {
- dev_err(dev, "could not prepare or enable cfg_clk0\n");
- clk_disable_unprepare(pdriver_dev->cfg_clk0);
- return -1;
- }
- }
- if (pdriver_dev->cfg_clk1 != NULL) {
- ret = clk_prepare_enable(pdriver_dev->cfg_clk1);
- if (ret < 0) {
- dev_err(dev, "could not prepare or enable cfg_clk1\n");
- clk_disable_unprepare(pdriver_dev->cfg_clk1);
- return -1;
- }
- }
- if (pdriver_dev->cfg_clk2 != NULL) {
- ret = clk_prepare_enable(pdriver_dev->cfg_clk2);
- if (ret < 0) {
- dev_err(dev, "could not prepare or enable cfg_clk2\n");
- clk_disable_unprepare(pdriver_dev->cfg_clk2);
- return -1;
- }
- }
- pr_info("%s csi Enabled clock\n", __func__);
- return 0;
- }
- static const struct dev_pm_ops bm_csi_runtime_pm_ops = {
- SET_RUNTIME_PM_OPS(bm_csi_runtime_suspend, bm_csi_runtime_resume, NULL)
- };
- static int bm_csi_open(struct inode * inode, struct file * file)
- {
- int ret = 0;
- struct bm_csi_drvdata *drvdata;
- struct device *dev;
- bm_info("enter %s\n", __func__);
- dev_info(dev, "open mipi-csi dev\n");
- drvdata = container_of(inode->i_cdev, struct bm_csi_drvdata, cdev);
- file->private_data = drvdata;
- dev = &drvdata->pdev->dev;
- dev_info(dev, "open mipi-csi dev\n");
- if (pm_runtime_get_sync(dev)) {
- ret = bm_csi_runtime_resume(dev);
- if (ret)
- pr_err("fail to resume csi %s %d\n", __func__, __LINE__);
- }
- return 0;
- };
- static long bm_csi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
- {
- long ret = 0;
- struct bm_csi_drvdata *drvdata;
- bm_info("enter %s\n", __func__);
- drvdata = file->private_data;
- if (drvdata == NULL) {
- bm_err("%s:file private is null point error\n", __func__);
- return -ENOMEM;
- }
- mutex_lock(&drvdata->mutex);
- switch (cmd) {
- case BMCSI_IOC_WRITE_REG:
- ret = bm_csi_write_reg(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_READ_REG:
- ret = bm_csi_read_reg(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_RESET:
- ret = bm_csi_reset(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_POWER:
- ret = bm_csi_set_power(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_G_POWER:
- ret = bm_csi_get_power(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_CLOCK:
- ret = bm_csi_set_clock(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_G_CLOCK:
- ret = bm_csi_get_clock(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_STREAM:
- ret = bm_csi_set_stream(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_G_STREAM:
- ret = bm_csi_get_stream(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_FMT:
- ret = bm_csi_set_fmt(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_G_FMT:
- ret = bm_csi_get_fmt(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_VC_SELECT:
- ret = bm_csi_set_vc_select(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_G_VC_SELECT:
- ret = bm_csi_get_vc_select(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_IPI_START:
- ret = bm_csi_ipi_enable(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_IPI_STOP:
- ret = bm_csi_ipi_disable(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_LANE_CFG:
- ret = bm_csi_set_lane_cfg(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_HSA_CFG:
- ret = bm_csi_set_hsa(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_HBP_CFG:
- ret = bm_csi_set_hbp(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_S_HSD_CFG:
- ret = bm_csi_set_hsd(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_SET_PIXCLK:
- ret = bm_csi_set_pixclk(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_GET_PIXCLK:
- ret = bm_csi_get_pixclk(drvdata, (void *)arg);
- break;
- case BMCSI_IOC_MAX:
- break;
- default:
- ret = -EPERM;
- bm_err("%s: unsupported command %d", __func__, cmd);
- break;
- }
- mutex_unlock(&drvdata->mutex);
- return ret;
- };
- static int bm_csi_release(struct inode * inode, struct file * file)
- {
- int ret = 0;
- struct bm_csi_drvdata *drvdata;
- struct device *dev;
- bm_info("enter %s\n", __func__);
- drvdata = container_of(inode->i_cdev, struct bm_csi_drvdata, cdev);
- file->private_data = drvdata;
- dev = &drvdata->pdev->dev;
- dev_info(dev, "release mipi-csi dev\n");
- ret = bm_csi_dis_power(drvdata);
- if (ret) {
- pr_info("fail to disable csi power, %s %d\n", __func__, __LINE__);
- }
- ret = pm_runtime_put_sync(dev);
- if (ret) {
- pr_info("fail to resume csi %s %d\n", __func__, __LINE__);
- }
- return 0;
- };
- static int bm_csi_mmap(struct file *pFile, struct vm_area_struct *vma)
- {
- bm_info("enter %s\n", __func__);
- return 0;
- };
- struct file_operations bm_csi_fops = {
- .owner = THIS_MODULE,
- .open = bm_csi_open,
- .release = bm_csi_release,
- .unlocked_ioctl = bm_csi_ioctl,
- .mmap = bm_csi_mmap,
- .poll = bm_csi_poll,
- };
- static int bm_csi_probe(struct platform_device *pdev)
- {
- int ret = 0;
- struct bm_csi_drvdata *drvdata;
- struct resource *iores_mem;
- unsigned int dphyglueiftester= 0;
- unsigned int sysreg_mipi_csi_ctrl = 0;
- u32 value;
- bm_info("enter %s\n", __func__);
- pdev->id = device_register_index;
- if (pdev->id >= BM_DRIVER_MAXCNT) {
- bm_err("%s:pdev id is %d error\n", __func__, pdev->id);
- return -EINVAL;
- }
- drvdata = devm_kzalloc(&pdev->dev,sizeof(struct bm_csi_drvdata), GFP_KERNEL);
- if (drvdata == NULL) {
- bm_err("%s:alloc struct drvdata error\n", __func__);
- return -ENOMEM;
- }
- iores_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- drvdata->base = devm_ioremap_resource(&pdev->dev, iores_mem);
- bm_info("%s: [%s%d]: drvdata->base=0x%px, phy_addr base=0x%llx\n", __func__,
- BM_DRIVER_NAME, pdev->id, drvdata->base, iores_mem->start);
- drvdata->reset = NULL;
- drvdata->device_idx = pdev->id;
- mutex_init(&drvdata->mutex);
- drvdata->irq_num = platform_get_irq(pdev, 0);
- bm_info("%s:[%s%d]: pdriver_dev->irq_num=%d\n", __func__, "BM_CSI", pdev->id, drvdata->irq_num);
- drvdata->pdev = pdev;
- /*parse clk info from dts*/
- drvdata->pclk = devm_clk_get(&pdev->dev, "pclk");
- if (IS_ERR(drvdata->pclk)) {
- dev_err(&pdev->dev, "failed to get pclk");
- drvdata->pclk = NULL;
- }
- drvdata->pixclk = devm_clk_get(&pdev->dev, "pixclk");
- if (IS_ERR(drvdata->pixclk)) {
- dev_err(&pdev->dev, "failed to get pixclk");
- drvdata->pixclk = NULL;
- }
- drvdata->cfg_clk0 = devm_clk_get(&pdev->dev, "cfg_clk0");
- if (IS_ERR(drvdata->cfg_clk0)) {
- dev_err(&pdev->dev, "failed to get cfg_clk0");
- drvdata->cfg_clk0 = NULL;
- }
- drvdata->cfg_clk1 = devm_clk_get(&pdev->dev, "cfg_clk1");
- if (IS_ERR(drvdata->cfg_clk1)) {
- dev_err(&pdev->dev, "failed to get cfg_clk1");
- drvdata->cfg_clk1 = NULL;
- }
- drvdata->cfg_clk2 = devm_clk_get(&pdev->dev, "cfg_clk2");
- if (IS_ERR(drvdata->cfg_clk2)) {
- dev_err(&pdev->dev, "failed to get cfg_clk2");
- drvdata->cfg_clk2 = NULL;
- }
- platform_set_drvdata(pdev, drvdata);
- if (pdev->id == 0) {
- if (bm_driver_major == 0) {
- ret = alloc_chrdev_region(&drvdata->devt, 0, BM_DRIVER_MAXCNT, BM_DRIVER_NAME);
- if (ret != 0) {
- bm_err("%s:alloc_chrdev_region error\n", __func__);
- return ret;
- }
- bm_driver_major = MAJOR(drvdata->devt);
- bm_driver_minor = MINOR(drvdata->devt);
- } else {
- drvdata->devt = MKDEV(bm_driver_major, bm_driver_minor);
- ret = register_chrdev_region(drvdata->devt, BM_DRIVER_MAXCNT, BM_DRIVER_NAME);
- if (ret) {
- bm_err("%s:register_chrdev_region error\n", __func__);
- return ret;
- }
- }
- bm_driver_class = class_create(THIS_MODULE, BM_DRIVER_NAME);
- if (IS_ERR(bm_driver_class)) {
- bm_err("%s[%d]:class_create error!\n", __func__, __LINE__);
- return -EINVAL;
- }
- }
- drvdata->devt = MKDEV(bm_driver_major, bm_driver_minor + pdev->id);
- cdev_init(&drvdata->cdev, &bm_csi_fops);
- ret = cdev_add(&drvdata->cdev, drvdata->devt, 1);
- if ( ret ) {
- bm_err("%s[%d]:cdev_add error!\n", __func__, __LINE__);
- return ret;
- } else {
- bm_info("%s[%d]:cdev_add OK, major=%d, minor=%d\n", __func__, __LINE__,
- bm_driver_major, bm_driver_minor + pdev->id);
- }
- drvdata->class = bm_driver_class;
- device_create(drvdata->class, NULL, drvdata->devt,
- drvdata, "%s%d", BM_DRIVER_NAME, pdev->id);
- /*read version*/
- value = readl(drvdata->base + 0x0);
- bm_info("offset=04, value is:0x%08x\n", value);
- device_property_read_u32(&pdev->dev, "dphyglueiftester", &dphyglueiftester);
- bm_info("dphyglueiftester is:0x%x\n", dphyglueiftester);
- device_property_read_u32(&pdev->dev, "sysreg_mipi_csi_ctrl", &sysreg_mipi_csi_ctrl);
- bm_info("sysreg_mipi_csi_ctrl is:0x%x\n", sysreg_mipi_csi_ctrl);
- dw_dphy_rx_probe(pdev, dphyglueiftester, sysreg_mipi_csi_ctrl);
- dw_csi_probe(pdev);
- pm_runtime_enable(&pdev->dev);
- ret = bm_csi_runtime_resume(&pdev->dev);
- if (ret < 0) {
- dev_err(&pdev->dev, "fail to resume csi\n");
- }
- ret = bm_csi_runtime_suspend(&pdev->dev);
- if (ret < 0) {
- dev_err(&pdev->dev, "fail to suspend csi\n");
- }
- device_register_index++;
- bm_info("exit %s:[%s%d]\n", __func__, BM_DRIVER_NAME, pdev->id);
- return 0;
- }
- static int bm_csi_remove(struct platform_device *pdev)
- {
- struct bm_csi_drvdata *drvdata;
- bm_info("enter %s\n", __func__);
- dw_dphy_rx_remove(pdev);
- dw_csi_remove(pdev);
- device_register_index--;
- drvdata = platform_get_drvdata(pdev);
- free_irq(drvdata->irq_num, drvdata);
- cdev_del(&drvdata->cdev);
- device_destroy(drvdata->class, drvdata->devt);
- unregister_chrdev_region(drvdata->devt, BM_DRIVER_MAXCNT);
- mutex_destroy(&drvdata->mutex);
- if (device_register_index == 0) {
- class_destroy(drvdata->class);
- }
- devm_kfree(&pdev->dev, drvdata);
- bm_info("exit %s\n", __func__);
- return 0;
- }
- static const struct of_device_id bm_csi_of_match[] = {
- { .compatible = "thead,light-bm-csi", },
- { /* sentinel */ },
- };
- MODULE_DEVICE_TABLE(of, bm_csi_of_match);
- static struct platform_driver bm_csi_driver = {
- .probe = bm_csi_probe,
- .remove = bm_csi_remove,
- .driver = {
- .name = BM_DRIVER_NAME,
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(bm_csi_of_match),
- .pm = &bm_csi_runtime_pm_ops,
- }
- };
- static int __init bm_csi_init_module(void)
- {
- int ret = 0;
- bm_info("enter %s\n", __func__);
- ret = platform_driver_register(&bm_csi_driver);
- if (ret) {
- bm_err("register platform driver failed.\n");
- return ret;
- }
- return ret;
- }
- static void __exit bm_csi_exit_module(void)
- {
- bm_info("enter %s\n", __func__);
- platform_driver_unregister(&bm_csi_driver);
- }
- module_init(bm_csi_init_module);
- module_exit(bm_csi_exit_module);
- MODULE_AUTHOR("Liu Yitong");
- MODULE_DESCRIPTION("BAREMETAL-CSI");
- MODULE_LICENSE("GPL");
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