Messages in this thread Patch in this message | | | From | Roger Quadros <> | Subject | [PATCH 1/2] usb: musb: host: Fix SuperSpeed hub enumeration | Date | Tue, 4 Feb 2014 15:28:06 +0200 |
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From: Ajay Kumar Gupta <ajay.gupta@ti.com>
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 <ajay.gupta@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> --- drivers/usb/musb/musb_host.c | 3 +++ 1 file changed, 3 insertions(+)
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; -- 1.8.3.2
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