40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
// Copyright (2019-2023) Paul Scherrer Institute
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#include "jfjoch_drv.h"
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#include <linux/module.h>
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static int device_index = 0;
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int jfjoch_register_misc_dev(struct pci_dev *pdev) {
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int err;
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struct jfjoch_drvdata *drvdata = pci_get_drvdata(pdev);
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snprintf( drvdata->name, 255, "jfjoch%d", device_index++);
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drvdata->miscdev.mode = 0660;
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drvdata->miscdev.minor = MISC_DYNAMIC_MINOR;
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drvdata->miscdev.fops = &jfjoch_cdev_fileops;
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drvdata->miscdev.name = drvdata->name;
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err = misc_register(&drvdata->miscdev);
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if (err)
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pr_notice("Misc device registration failed\n");
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return err;
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}
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void jfjoch_unregister_misc_dev(struct pci_dev *pdev) {
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struct jfjoch_drvdata *drvdata = pci_get_drvdata(pdev);
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misc_deregister(&drvdata->miscdev);
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}
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int jfjoch_cdev_open(struct inode *inode, struct file *file) {
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return 0;
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}
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int jfjoch_cdev_release(struct inode *inode, struct file *file) {
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struct jfjoch_drvdata *drvdata = container_of(file->private_data, struct jfjoch_drvdata, miscdev);
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if (file->f_mode & FMODE_WRITE)
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jfjoch_cancel(drvdata);
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return 0;
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}
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