opl_minte.c文件参考
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <opl_minte.h>
#include <ipmux_interrupt.h>
| #define | OPL_MINTE_MAJOR 120 |
| #define | OPL_MINTE_DEVICE "opl_minte" |
the variable and function imported. | |
| u32 | get_irq_pending (void) |
| void | clear_irq_pending (void) |
| void | ipmux_irq_enable (unsigned int irq) |
| void | ipmux_irq_disable (unsigned int irq) |
local function declaration | |
| int | opl_minte_open (struct inode *inode, struct file *filp) |
| ssize_t | opl_minte_read (struct file *filp, char *buffer, size_t length, loff_t *offset) |
| description: copy the opl_chip_irq_pending(indicate which interrupt occured) to user App, which will handle its interrupt.if the no irq pending occured,the process will sleep until the isr wake up it. | |
| ssize_t | opl_minte_write (struct file *filp, const char *buffer, size_t length, loff_t *offset) |
| description: because the enable irq or disable irq will be in atomic mode,so it should be operated in kernel mode is correct. | |
| int | opl_minte_release (struct inode *inode, struct file *filp) |
the global variable declaration and definition. | |
| u32 | g_opl_chip_irq_event = 0 |
| wait_queue_head_t | g_opl_chip_waitq |
local variable declaration and definition | |
| u32 | opl_minte_open_count = 0 |
| u32 | opl_minte_is_open = 0 |
| file_operations | opl_minte_fops |
函数 | |
| int __init | opl_minte_init (void) |
| description: The driver module entry.to register the chrdev and request irq. | |
| void __exit | opl_minte_exit (void) |
| description: it is called when the module removed. | |
| module_init (opl_minte_init) | |
| module_exit (opl_minte_exit) | |
| MODULE_LICENSE ("GPL2") | |
| MODULE_AUTHOR ("stephanxu <[email protected]>") | |
| MODULE_DESCRIPTION ("control interface for opulan ipmux-e switch chip") | |
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