IPMUX1IPMUX2IPMUX3: register mmap module

RTL96xx (RTL9607,...)

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register mmap module

详细描述

THE FORMAT is FOR DOXYGEN to Generate the document opulan.com.

作者:: [email protected]

版本:: v0.2

日期:: June-29-2007 author date description ------------------------------------------------------------------- hxu June-29-2007 mainly from the old version and rewrite the opulan_read function.
hxu July-05-2007 distill the piece of the ipmux driver code dedicated for the opl switch chip register map.


模块
组	function_description(opl_reg_mmap.c)
#define	OPL_REG_MAJOR 110
#define	OPL_REG_DEVICE "opl_reg"
local function declaration
int	opl_reg_open (struct inode inode, struct file filp)
ssize_t	opl_reg_write (struct file filp, const char buffer, size_t length, loff_t *offset)
int	opl_reg_release (struct inode inode, struct file filp)
ssize_t	opl_reg_read (struct file filp, char buffer, size_t length, loff_t *offset)
	description:
int	opl_reg_mmap (struct file file, struct vm_area_struct vma)
	description: memory map the ipmux register into user space to access it.
local variable declaration and definition
u32	opl_reg_open_count = 0
u32	opl_reg_is_open = 0
file_operations	opl_reg_fops

宏定义文档

#define OPL_REG_DEVICE "opl_reg"

在文件opl_reg_mmap.c第32行定义。

参考自 opl_reg_exit()及opl_reg_init().

#define OPL_REG_MAJOR 110

在文件opl_reg_mmap.c第31行定义。

参考自 opl_reg_exit()及opl_reg_init().

函数文档

int opl_reg_mmap	(	struct file *	file,
		struct vm_area_struct *	vma
	)	`[static]`

description: memory map the ipmux register into user space to access it.

which will reduce the spense on copy value between kernel space with user space. and reduce the dependency on interface of OS. the ipmux register must be NOcached and NO swap out and NO Coredump.

参数:

	struct	file *file
	struct	vm_area_struct *vma

返回值:

	0	success.
	-(x)	failure.

参见:: mmap manual.

Deprecated:

在文件opl_reg_mmap.c第124行定义。

int opl_reg_open	(	struct inode *	inode,
		struct file *	filp
	)	`[static]`

在文件opl_reg_mmap.c第150行定义。

参考 opl_reg_is_open及opl_reg_open_count.

ssize_t opl_reg_read	(	struct file *	filp,
		char *	buffer,
		size_t	length,
		loff_t *	offset
	)	`[static]`

description:

参数:

	@param
	@return

返回值:

@retval

参见:

Deprecated:

在文件opl_reg_mmap.c第102行定义。

int opl_reg_release	(	struct inode *	inode,
		struct file *	filp
	)	`[static]`

在文件opl_reg_mmap.c第159行定义。

参考 opl_reg_is_open及opl_reg_open_count.

ssize_t opl_reg_write	(	struct file *	filp,
		const char *	buffer,
		size_t	length,
		loff_t *	offset
	)	`[static]`

在文件opl_reg_mmap.c第107行定义。

变量文档

struct file_operations opl_reg_fops

初始化序列：

 {
  .read = opl_reg_read,
  .write = opl_reg_write,
  .mmap = opl_reg_mmap,
  .open = opl_reg_open,
  .release = opl_reg_release, 
}

在文件opl_reg_mmap.c第75行定义。

参考自 opl_reg_init().

u32 opl_reg_is_open = 0 [static]

在文件opl_reg_mmap.c第74行定义。

参考自 opl_reg_open()及opl_reg_release().

u32 opl_reg_open_count = 0 [static]

在文件opl_reg_mmap.c第73行定义。

参考自 opl_reg_open()及opl_reg_release().

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