The bcdDevice field is defined as |Device release number in binary-coded decimal in the USB 2.0 specification. We use this field to distinguish the UDCs from each other. In theory this could be used on the host side to apply certain quirks if the "special" UDC in combination with this gadget is used. This hasn't been done as far as I am aware. In practice it would be better to fix the UDC driver before shipping since a later release might not need this quirk anymore.
This patch converts this gadget to use the U-Boot version instead of a random 2 or 3 plus the UDC number. Linux stopped using this functionality in 2012, remove it from U-Boot as well.
Matching Linux kernel commit: ed9cbda63d45 ("usb: gadget: remove usb_gadget_controller_number()")
Signed-off-by: Marek Vasut marek.vasut+renesas@mailbox.org --- Cc: Alexander Sverdlin alexander.sverdlin@siemens.com Cc: Felipe Balbi felipe.balbi@linux.intel.com Cc: Lukasz Majewski lukma@denx.de Cc: Mattijs Korpershoek mkorpershoek@baylibre.com Cc: Nishanth Menon nm@ti.com Cc: Simon Glass sjg@chromium.org Cc: Thinh Nguyen Thinh.Nguyen@synopsys.com Cc: Tom Rini trini@konsulko.com Cc: u-boot@lists.denx.de --- drivers/usb/gadget/g_dnl.c | 17 +++-------------- 1 file changed, 3 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c index b5b5f5d8c11..631969b3405 100644 --- a/drivers/usb/gadget/g_dnl.c +++ b/drivers/usb/gadget/g_dnl.c @@ -17,10 +17,10 @@ #include <usb_mass_storage.h> #include <dfu.h> #include <thor.h> +#include <version.h>
#include <env_callback.h>
-#include "gadget_chips.h" #include "composite.c"
/* @@ -199,18 +199,6 @@ void g_dnl_clear_detach(void) g_dnl_detach_request = false; }
-static int g_dnl_get_bcd_device_number(struct usb_composite_dev *cdev) -{ - struct usb_gadget *gadget = cdev->gadget; - int gcnum; - - gcnum = usb_gadget_controller_number(gadget); - if (gcnum > 0) - gcnum += 0x200; - - return g_dnl_get_board_bcd_device_number(gcnum); -} - /** * Update internal serial number variable when the "serial#" env var changes. * @@ -261,7 +249,8 @@ static int g_dnl_bind(struct usb_composite_dev *cdev) if (ret) goto error;
- gcnum = g_dnl_get_bcd_device_number(cdev); + gcnum = g_dnl_get_board_bcd_device_number((U_BOOT_VERSION_NUM << 4) | + U_BOOT_VERSION_NUM_PATCH); if (gcnum >= 0) device_desc.bcdDevice = cpu_to_le16(gcnum); else {