/*
?*?A?virtual?bus?for?LDD?sample?code?devices?to?plug?into.??This
?*?code?is?heavily?borrowed?from?drivers/base/sys.c
?*
?*?Copyright?（C）?2001?Alessandro?Rubini?and?Jonathan?Corbet
?*?Copyright?（C）?2001?O‘Reilly?&?Associates
?*
?*?The?source?code?in?this?file?can?be?freely?used?adapted
?*?and?redistributed?in?source?or?binary?form?so?long?as?an
?*?acknowledgment?appears?in?derived?source?files.??The?citation
?*?should?list?that?the?code?comes?from?the?book?“Linux?Device
?*?Drivers“?by?Alessandro?Rubini?and?Jonathan?Corbet?published
?*?by?O‘Reilly?&?Associates.???No?warranty?is?attached;
?*?we?cannot?take?responsibility?for?errors?or?fitness?for?use.
?*
?*/
/*?$Id:?lddbus.cv?1.9?2004/09/26?08:12:27?gregkh?Exp?$?*/

#include?
#include?
#include?
#include?
#include?
#include?“lddbus.h“

MODULE_AUTHOR（“Jonathan?Corbet“）;
MODULE_LICENSE（“Dual?BSD/GPL“）;
static?char?*Version?=?“$Revision:?1.9?$“;

/*
?*?Respond?to?hotplug?events.
?*/
static?int?ldd_hotplug（struct?device?*dev?char?**envp?int?num_envp
		char?*buffer?int?buffer_size）
{
	envp[0]?=?buffer;
	if?（snprintf（buffer?buffer_size?“LDDBUS_VERSION=%s“
			????Version）?>=?buffer_size）
		return?-ENOMEM;
	envp[1]?=?NULL;
	return?0;
}

/*
?*?Match?LDD?devices?to?drivers.??Just?do?a?simple?name?test.
?*/
static?int?ldd_match（struct?device?*dev?struct?device_driver?*driver）
{
	return?!strncmp（dev->bus_id?driver->name?strlen（driver->name））;
}


/*
?*?The?LDD?bus?device.
?*/
static?void?ldd_bus_release（struct?device?*dev）
{
	printk（KERN_DEBUG?“lddbus?release\n“）;
}
	
struct?device?ldd_bus?=?{
	.bus_id???=?“ldd0“
	.release??=?ldd_bus_release
};


/*
?*?And?the?bus?type.
?*/
struct?bus_type?ldd_bus_type?=?{
	.name?=?“ldd“
	.match?=?ldd_match
	.hotplug??=?ldd_hotplug
};

/*
?*?Export?a?simple?attribute.
?*/
static?ssize_t?show_bus_version（struct?bus_type?*bus?char?*buf）
{
	return?snprintf（buf?PAGE_SIZE?“%s\n“?Version）;
}

static?BUS_ATTR（version?S_IRUGO?show_bus_version?NULL）;



/*
?*?LDD?devices.
?*/

/*
?*?For?now?no?references?to?LDDbus?devices?go?out?which?are?not
?*?tracked?via?the?module?reference?count?so?we?use?a?no-op
?*?release?function.
?*/
static?void?ldd_dev_release（struct?device?*dev）
{?}

int?register_ldd_device（struct?ldd_device?*ldddev）
{
	ldddev->dev.bus?=?&ldd_bus_type;
	ldddev->dev.parent?=?&ldd_bus;
	ldddev->dev.release?=?ldd_dev_release;
	strncpy（ldddev->dev.bus_id?ldddev->name?BUS_ID_SIZE）;
	return?device_register（&ldddev->dev）;
}
EXPORT_SYMBOL（register_ldd_device）;

void?unregister_ldd_device（struct?ldd_device?*ldddev）
{
	device_unregister（&ldddev->dev）;
}
EXPORT_SYMBOL（unregister_ldd_device）;

/*
?*?Crude?driver?interface.
?*/


static?ssize_t?show_version（struct?device_driver?*driver?char?*buf）
{
	struct?ldd_driver?*ldriver?=?to_ldd_driver（driver）;

	sprintf（buf?“%s\n“?ldriver->version）;
	return?strlen（buf）;
}
		

int?register_ldd_driver（struct?ldd_driver?*driver）
{
	int?ret

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-06-06?18:09??examples\
?????目錄???????????0??2019-06-06?18:09??examples\include\
?????文件?????????855??2005-02-01?04:31??examples\include\lddbus.h
?????目錄???????????0??2019-06-06?18:09??examples\lddbus\
?????文件????????4058??2005-02-01?04:31??examples\lddbus\lddbus.c
?????文件?????????710??2005-02-01?04:31??examples\lddbus\Makefile
?????文件????????1091??2005-02-01?04:31??examples\LICENSE
?????文件?????????289??2005-02-01?04:31??examples\Makefile
?????目錄???????????0??2019-06-06?18:09??examples\misc-modules\
?????文件????????2128??2005-02-01?04:31??examples\misc-modules\complete.c
?????文件????????2000??2005-02-01?04:31??examples\misc-modules\faulty.c
?????文件?????????463??2005-02-01?04:31??examples\misc-modules\hello.c
?????文件????????1130??2005-02-01?04:31??examples\misc-modules\hellop.c
?????文件????????6194??2005-02-01?04:31??examples\misc-modules\jiq.c
?????文件????????7571??2005-02-01?04:31??examples\misc-modules\jit.c
?????文件????????2293??2005-02-01?04:31??examples\misc-modules\kdataalign.c
?????文件????????1489??2005-02-01?04:31??examples\misc-modules\kdatasize.c
?????文件?????????987??2005-02-01?04:31??examples\misc-modules\Makefile
?????文件????????2044??2005-02-01?04:31??examples\misc-modules\seq.c
?????文件????????6200??2005-02-01?04:31??examples\misc-modules\silly.c
?????文件????????2161??2005-02-01?04:31??examples\misc-modules\sleepy.c
?????目錄???????????0??2019-06-06?18:09??examples\misc-progs\
?????文件????????1483??2005-02-01?04:31??examples\misc-progs\asynctest.c
?????文件????????2088??2005-02-01?04:31??examples\misc-progs\dataalign.c
?????文件????????1287??2005-02-01?04:31??examples\misc-progs\datasize.c
?????文件?????????417??2005-02-01?04:31??examples\misc-progs\gdbline
?????文件????????3372??2005-02-01?04:31??examples\misc-progs\inp.c
?????文件?????????925??2005-02-01?04:31??examples\misc-progs\load50.c
?????文件?????????297??2005-02-01?04:31??examples\misc-progs\Makefile
?????文件????????1975??2005-02-01?04:31??examples\misc-progs\mapcmp.c
?????文件????????2170??2005-02-01?04:31??examples\misc-progs\mapper.c
............此處省略86個文件信息