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usb: musb: host: Fix SuperSpeed hub enumeration

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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 <[email protected]>
Signed-off-by: Roger Quadros <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
This commit is contained in:
Ajay Kumar Gupta 2014-02-04 15:28:06 +02:00 • committed by Felipe Balbi
commit 3c4653c1f6
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/musb/musb_host.c
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@ -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;