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[PATCH] USB: add dynamic id functionality to USB core

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Echo the usb vendor and product id to the "new_id" file in the driver's
sysfs directory, and then that driver will be able to bind to a device
with those ids if it is present.

Example:
	echo 0557 2008 > /sys/bus/usb/drivers/foo_driver/new_id
adds the hex values 0557 and 2008 to the device id table for the foo_driver.

Note, usb-serial drivers do not currently work with this capability yet.
usb-storage also might have some oddities.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman
2005-11-16 13:41:28 -08:00
parent ddae41be61
commit 733260ff9c
2 changed files with 176 additions and 50 deletions
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8
include/linux/usb.h
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@@ -529,6 +529,11 @@ static inline int usb_make_path (struct usb_device *dev, char *buf,
/* ----------------------------------------------------------------------- */
struct usb_dynids {
spinlock_t lock;
struct list_head list;
};
/**
* struct usb_driver - identifies USB driver to usbcore
* @owner: Pointer to the module owner of this driver; initialize
@@ -553,6 +558,8 @@ static inline int usb_make_path (struct usb_device *dev, char *buf,
* @id_table: USB drivers use ID table to support hotplugging.
* Export this with MODULE_DEVICE_TABLE(usb,...). This must be set
* or your driver's probe function will never get called.
* @dynids: used internally to hold the list of dynamically added device
* ids for this driver.
* @driver: the driver model core driver structure.
*
* USB drivers must provide a name, probe() and disconnect() methods,
@@ -588,6 +595,7 @@ struct usb_driver {
const struct usb_device_id *id_table;
struct usb_dynids dynids;
struct device_driver driver;
};
#define to_usb_driver(d) container_of(d, struct usb_driver, driver)