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authorMichal Nazarewicz <m.nazarewicz@samsung.com>2010-08-12 17:43:46 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-22 10:21:23 -0700
commitad1a8102f957f4d25fc58cdc10736c5ade7557e1 (patch)
treea9bb1ee6b26a2171e43edc77dc51fdb839135d90 /include/linux/usb/composite.h
parentfc19de61ef5c17b6e19766052c6ac85cf31de876 (diff)
USB: gadget: composite: Better string override handling
The iManufatcurer, iProduct and iSerialNumber composite module parameters were only used when the gadget driver registers strings for manufacturer, product and serial number. If the gadget never bothered to set corresponding fields in USB device descriptors those module parameters are ignored. This commit makes the parameters work even if the strings ID have not been assigned. It also changes the way IDs are overridden -- what IDs are overridden is now saved in usb_composite_dev structure -- which makes it unnecessary to modify the string tables the way previous code did. The commit also adds a iProduct and iManufatcurer fields to the usb_composite_device structure. If they are set, appropriate strings are reserved and added to device descriptor. This makes it unnecessary for gadget drivers to maintain code for setting those. If iProduct is not set it defaults to usb_composite_device::name; if iManufatcurer is not set a default "<system> <release> with <gadget-name>" is used. The last thing is that if needs_serial field of usb_composite_device is set and user failed to provided iSerialNumber parameter a warning is issued. Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/usb/composite.h')
-rw-r--r--include/linux/usb/composite.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 617068134ae..a78e813d27e 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -237,10 +237,17 @@ int usb_add_config(struct usb_composite_dev *,
/**
* struct usb_composite_driver - groups configurations into a gadget
* @name: For diagnostics, identifies the driver.
+ * @iProduct: Used as iProduct override if @dev->iProduct is not set.
+ * If NULL value of @name is taken.
+ * @iManufacturer: Used as iManufacturer override if @dev->iManufacturer is
+ * not set. If NULL a default "<system> <release> with <udc>" value
+ * will be used.
* @dev: Template descriptor for the device, including default device
* identifiers.
* @strings: tables of strings, keyed by identifiers assigned during bind()
* and language IDs provided in control requests
+ * @needs_serial: set to 1 if the gadget needs userspace to provide
+ * a serial number. If one is not provided, warning will be printed.
* @bind: (REQUIRED) Used to allocate resources that are shared across the
* whole device, such as string IDs, and add its configurations using
* @usb_add_config(). This may fail by returning a negative errno
@@ -266,8 +273,11 @@ int usb_add_config(struct usb_composite_dev *,
*/
struct usb_composite_driver {
const char *name;
+ const char *iProduct;
+ const char *iManufacturer;
const struct usb_device_descriptor *dev;
struct usb_gadget_strings **strings;
+ unsigned needs_serial:1;
/* REVISIT: bind() functions can be marked __init, which
* makes trouble for section mismatch analysis. See if
@@ -334,6 +344,9 @@ struct usb_composite_dev {
struct list_head configs;
struct usb_composite_driver *driver;
u8 next_string_id;
+ u8 manufacturer_override;
+ u8 product_override;
+ u8 serial_override;
/* the gadget driver won't enable the data pullup
* while the deactivation count is nonzero.