From: Ajay Kumar Gupta Date: Tue, 4 Feb 2014 13:28:06 +0000 (+0200) Subject: usb: musb: host: Fix SuperSpeed hub enumeration X-Git-Tag: upstream/snapshot3+hdmi~3372^2~1^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3c4653c1f62ea5f1706084090a5a3bcf3402dc8f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git usb: musb: host: Fix SuperSpeed hub enumeration Disables PING on status phase of control transfer. PING token is not mandatory in status phase of control transfer and so some high speed USB devices don't support it. If such devices are connected to MUSB then they would not respond to PING token causing delayed or failed enumeration. [Roger Q] Fixes enumeration issues with some Super-Speed USB hubs e.g. Dlink DUB-1340 Signed-off-by: Ajay Kumar Gupta Signed-off-by: Roger Quadros Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index ed45572..abb38c3 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -1183,6 +1183,9 @@ irqreturn_t musb_h_ep0_irq(struct musb *musb) csr = MUSB_CSR0_H_STATUSPKT | MUSB_CSR0_TXPKTRDY; + /* disable ping token in status phase */ + csr |= MUSB_CSR0_H_DIS_PING; + /* flag status stage */ musb->ep0_stage = MUSB_EP0_STATUS;