USB serial: add dynamic id support to usb-serial core
Thanks to Johannes Hölzl <johannes.hoelzl@gmx.de> for fixing a few
things and getting it all working properly.
This adds support for dynamic usb ids to the usb serial core. The file
"new_id" will show up under the usb serial driver, not the usb driver
associated with the usb-serial driver (yeah, it can be a bit confusing
at first glance...)
This patch also modifies the USB core to allow the usb-serial core to
reuse much of the dynamic id logic.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Johannes Hölzl <johannes.hoelzl@gmx.de>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index f3b2163..3cb9285 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -476,6 +476,8 @@
struct usb_interface *iface);
const struct usb_device_id *usb_match_id(struct usb_interface *interface,
const struct usb_device_id *id);
+extern int usb_match_one_id(struct usb_interface *interface,
+ const struct usb_device_id *id);
extern struct usb_interface *usb_find_interface(struct usb_driver *drv,
int minor);
@@ -724,11 +726,21 @@
/* ----------------------------------------------------------------------- */
+/* Stuff for dynamic usb ids */
struct usb_dynids {
spinlock_t lock;
struct list_head list;
};
+struct usb_dynid {
+ struct list_head node;
+ struct usb_device_id id;
+};
+
+extern ssize_t usb_store_new_id(struct usb_dynids *dynids,
+ struct device_driver *driver,
+ const char *buf, size_t count);
+
/**
* struct usbdrv_wrap - wrapper for driver-model structure
* @driver: The driver-model core driver structure.
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 10f99e5..33dcd85 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -179,6 +179,9 @@
* memory structure allocation at this point in time.
* @shutdown: pointer to the driver's shutdown function. This will be
* called when the device is removed from the system.
+ * @usb_driver: pointer to the struct usb_driver that controls this
+ * device. This is necessary to allow dynamic ids to be added to
+ * the driver from sysfs.
*
* This structure is defines a USB Serial driver. It provides all of
* the information that the USB serial core code needs. If the function
@@ -202,6 +205,8 @@
struct list_head driver_list;
struct device_driver driver;
+ struct usb_driver *usb_driver;
+ struct usb_dynids dynids;
int (*probe) (struct usb_serial *serial, const struct usb_device_id *id);
int (*attach) (struct usb_serial *serial);