diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2011-05-27 13:37:33 +0900 |
|---|---|---|
| committer | Niket Sirsi <nsirsi@nvidia.com> | 2011-06-14 16:13:56 -0700 |
| commit | dd72a545eec26bb5a52d19dca2e03a631ebe366d (patch) | |
| tree | 06cab6a02439d338fc7f45771f755f85bed1e7d7 | |
| parent | 0b663596c2a901774debdb139a201631cfbc19fd (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)
Reviewed-on: http://git-master/r/35613
(cherry picked from commit 126a2fca500004a4b03ea377da000e8972efaed6)
Change-Id: Iaff87cbc2fe3332f9cb27a08e1156015fc66a3c5
Reviewed-on: http://git-master/r/36211
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 08079b0dffa6..02adcc2afbb3 100644 --- a/drivers/usb/gadget/fsl_udc_core.c +++ b/drivers/usb/gadget/fsl_udc_core.c @@ -1598,6 +1598,11 @@ 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; |