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 <[EMAIL PROTECTED]>
Signed-off-by: Johannes Hölzl <[EMAIL PROTECTED]>
---
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 113e484..678ac8c 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -28,24 +28,16 @@ #include <linux/workqueue.h>
#include "hcd.h"
#include "usb.h"
-static int usb_match_one_id(struct usb_interface *interface,
- const struct usb_device_id *id);
-
-struct usb_dynid {
- struct list_head node;
- struct usb_device_id id;
-};
-
#ifdef CONFIG_HOTPLUG
/*
* Adds a new dynamic USBdevice ID to this driver,
* and cause the driver to probe for all devices again.
*/
-static ssize_t store_new_id(struct device_driver *driver,
- const char *buf, size_t count)
+ssize_t usb_store_new_id(struct usb_dynids *dynids,
+ struct device_driver *driver,
+ const char *buf, size_t count)
{
- struct usb_driver *usb_drv = to_usb_driver(driver);
struct usb_dynid *dynid;
u32 idVendor = 0;
u32 idProduct = 0;
@@ -65,9 +57,9 @@ static ssize_t store_new_id(struct devic
dynid->id.idProduct = idProduct;
dynid->id.match_flags = USB_DEVICE_ID_MATCH_DEVICE;
- spin_lock(&usb_drv->dynids.lock);
- list_add_tail(&usb_drv->dynids.list, &dynid->node);
- spin_unlock(&usb_drv->dynids.lock);
+ spin_lock(&dynids->lock);
+ list_add_tail(&dynids->list, &dynid->node);
+ spin_unlock(&dynids->lock);
if (get_driver(driver)) {
retval = driver_attach(driver);
@@ -78,6 +70,15 @@ static ssize_t store_new_id(struct devic
return retval;
return count;
}
+EXPORT_SYMBOL_GPL(usb_store_new_id);
+
+static ssize_t store_new_id(struct device_driver *driver,
+ const char *buf, size_t count)
+{
+ struct usb_driver *usb_drv = to_usb_driver(driver);
+
+ return usb_store_new_id(&usb_drv->dynids, driver, buf, count);
+}
static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
static int usb_create_newid_file(struct usb_driver *usb_drv)
@@ -365,8 +366,8 @@ void usb_driver_release_interface(struct
EXPORT_SYMBOL(usb_driver_release_interface);
/* returns 0 if no match, 1 if match */
-static int usb_match_one_id(struct usb_interface *interface,
- const struct usb_device_id *id)
+int usb_match_one_id(struct usb_interface *interface,
+ const struct usb_device_id *id)
{
struct usb_host_interface *intf;
struct usb_device *dev;
@@ -422,6 +423,8 @@ static int usb_match_one_id(struct usb_i
return 1;
}
+EXPORT_SYMBOL(usb_match_one_id);
+
/**
* usb_match_id - find first usb_device_id matching device or interface
* @interface: the interface of interest
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c
index 6542f22..11e6935 100644
--- a/drivers/usb/serial/bus.c
+++ b/drivers/usb/serial/bus.c
@@ -103,11 +103,52 @@ exit:
return retval;
}
+#ifdef CONFIG_HOTPLUG
+static ssize_t store_new_id(struct device_driver *driver,
+ const char *buf, size_t count)
+{
+ struct usb_serial_driver *usb_drv = to_usb_serial_driver(driver);
+ ssize_t retval = usb_store_new_id(&usb_drv->dynids, driver, buf, count);
+
+ if (retval >= 0 && &usb_drv->usb_driver != NULL)
+ retval = usb_store_new_id(&usb_drv->usb_driver->dynids,
+ &usb_drv->usb_driver->drvwrap.driver,
+ buf, count);
+ return retval;
+}
+
+static struct driver_attribute drv_attrs[] = {
+ __ATTR(new_id, S_IWUSR, NULL, store_new_id),
+ __ATTR_NULL,
+};
+
+static void free_dynids(struct usb_serial_driver *drv)
+{
+ struct usb_dynid *dynid, *n;
+
+ spin_lock(&drv->dynids.lock);
+ list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
+ list_del(&dynid->node);
+ kfree(dynid);
+ }
+ spin_unlock(&drv->dynids.lock);
+}
+
+#else
+static struct driver_attribute drv_attrs[] = {
+ __ATTR_NULL,
+};
+static inline void free_dynids(struct usb_driver *drv)
+{
+}
+#endif
+
struct bus_type usb_serial_bus_type = {
.name = "usb-serial",
.match = usb_serial_device_match,
.probe = usb_serial_device_probe,
.remove = usb_serial_device_remove,
+ .drv_attrs = drv_attrs,
};
int usb_serial_bus_register(struct usb_serial_driver *driver)
@@ -115,6 +156,9 @@ int usb_serial_bus_register(struct usb_s
int retval;
driver->driver.bus = &usb_serial_bus_type;
+ spin_lock_init(&driver->dynids.lock);
+ INIT_LIST_HEAD(&driver->dynids.list);
+
retval = driver_register(&driver->driver);
return retval;
@@ -122,6 +166,7 @@ int usb_serial_bus_register(struct usb_s
void usb_serial_bus_deregister(struct usb_serial_driver *driver)
{
+ free_dynids(driver);
driver_unregister(&driver->driver);
}
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 8006e51..f5e96e0 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -43,7 +43,7 @@ #define DRIVER_DESC "USB Serial Driver c
static void port_free(struct usb_serial_port *port);
/* Driver structure we register with the USB core */
-static struct usb_driver usb_serial_driver = {
+struct usb_driver usb_serial_driver = {
.name = "usbserial",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
@@ -595,6 +595,39 @@ static struct usb_serial * create_serial
return serial;
}
+static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf,
+ struct usb_serial_driver
*drv)
+{
+ struct usb_dynid *dynid;
+
+ spin_lock(&drv->dynids.lock);
+ list_for_each_entry(dynid, &drv->dynids.list, node) {
+ if (usb_match_one_id(intf, &dynid->id)) {
+ spin_unlock(&drv->dynids.lock);
+ return &dynid->id;
+ }
+ }
+ spin_unlock(&drv->dynids.lock);
+ return NULL;
+}
+
+static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv,
+ struct usb_interface *intf)
+{
+ const struct usb_device_id *id;
+
+ id = usb_match_id(intf, drv->id_table);
+ if (id) {
+ dbg("static descriptor matches");
+ goto exit;
+ }
+ id = match_dynamic_id(intf, drv);
+ if (id)
+ dbg("dynamic descriptor matches");
+exit:
+ return id;
+}
+
static struct usb_serial_driver *search_serial_device(struct usb_interface
*iface)
{
struct list_head *p;
@@ -604,11 +637,9 @@ static struct usb_serial_driver *search_
/* Check if the usb id matches a known device */
list_for_each(p, &usb_serial_driver_list) {
t = list_entry(p, struct usb_serial_driver, driver_list);
- id = usb_match_id(iface, t->id_table);
- if (id != NULL) {
- dbg("descriptor matches");
+ id = get_iface_id(t, iface);
+ if (id)
return t;
- }
}
return NULL;
@@ -660,7 +691,7 @@ int usb_serial_probe(struct usb_interfac
return -EIO;
}
- id = usb_match_id(interface, type->id_table);
+ id = get_iface_id(type, interface);
retval = type->probe(serial, id);
module_put(type->driver.owner);
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 5482bfb..83c6c39 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -446,6 +446,8 @@ extern void usb_driver_release_interface
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);
@@ -574,11 +576,21 @@ #define USB_INTERFACE_INFO(cl,sc,pr) \
/* ----------------------------------------------------------------------- */
+/* 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 91b3ea2..1c87cb7 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -202,6 +202,8 @@ struct usb_serial_driver {
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);
@@ -272,6 +274,7 @@ extern int usb_serial_bus_register (stru
extern void usb_serial_bus_deregister (struct usb_serial_driver *device);
extern struct usb_serial_driver usb_serial_generic_device;
+extern struct usb_driver usb_serial_driver;
extern struct bus_type usb_serial_bus_type;
extern struct tty_driver *usb_serial_tty_driver;
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