diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2011-05-27 13:37:33 +0900 |
|---|---|---|
| committer | Yuhao Ding <yding@nvidia.com> | 2011-06-13 12:09:07 -0700 |
| commit | 166531c98333cfe635b65dc35c1981dc17cc9dd1 (patch) | |
| tree | bf6b078e72ece8b03f77deab3dd5dbe89602bc10 | |
| parent | 022f4a7c1f4aa4c26944e59987b522a91901f601 (diff) | |
usb: gadget: introduce delay when setting address of tegra device
Some windows host drivers require this small delay in order to properly
detect the tegra device. This patch ensures correct detection in all
cases.
Workaround for bug 814907
Change-Id: I3ff294f9cbe3660964b9bd227c233f4e20115e80
Reviewed-on: http://git-master/r/35352
Reviewed-by: Alex Courbot <acourbot@nvidia.com>
Tested-by: Alex Courbot <acourbot@nvidia.com>
Reviewed-by: David Schalig <dschalig@nvidia.com>
Tested-by: David Schalig <dschalig@nvidia.com>
Reviewed-by: Hanumanth Venkateswa Moganty <vmoganty@nvidia.com>
| -rw-r--r-- | drivers/usb/gadget/fsl_udc_core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c index c67230db46eb..82118cd1cbf7 100644 --- a/drivers/usb/gadget/fsl_udc_core.c +++ b/drivers/usb/gadget/fsl_udc_core.c @@ -1561,6 +1561,11 @@ static void setup_received_irq(struct fsl_udc *udc, if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE)) break; +#ifdef CONFIG_ARCH_TEGRA + /* This delay is necessary for some windows drivers to + * properly recognize the device */ + mdelay(1); +#endif ch9setaddress(udc, wValue, wIndex, wLength); return; |