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| author | Ajay Kumar Gupta <ajay.gupta@ti.com> | 2014-02-04 15:28:06 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-02-18 10:32:23 -0600 |
| commit | 3c4653c1f62ea5f1706084090a5a3bcf3402dc8f (patch) | |
| tree | 10dcf56ecc0504b6e54fe2b5c3f31f3c48bf8adc | |
| parent | 30a70b026b4cde4e51989661ff3bd0ede08d9646 (diff) | |
| download | blackbird-op-linux-3c4653c1f62ea5f1706084090a5a3bcf3402dc8f.tar.gz blackbird-op-linux-3c4653c1f62ea5f1706084090a5a3bcf3402dc8f.zip | |
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 <ajay.gupta@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index ed455724017b..abb38c3833ef 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; |
