diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2011-05-27 13:37:33 +0900 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2011-06-09 01:33:34 -0700 |
| commit | 126a2fca500004a4b03ea377da000e8972efaed6 (patch) | |
| tree | 938efed984f2860834cca46b0cc7c1e149b3e4d4 | |
| parent | 7798bb9251068a190af7c1bbf616ad8af01bbe52 (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
(cherry picked from commit 53c4f00605677c8de4311586c4f75903978cbd94)
Change-Id: Ib950c39bc6f28e28793ef655e0bb9e04ebb39942
Reviewed-on: http://git-master/r/35613
Reviewed-by: Alex Courbot <acourbot@nvidia.com>
Tested-by: Alex Courbot <acourbot@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@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; |