diff options
| author | Li Jun <B47624@freescale.com> | 2015-03-08 11:05:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-15 12:27:20 +0300 |
| commit | d20f7807996c69537e07443ef8dec4e01a28b099 (patch) | |
| tree | 8abe4838fa65372922477f9dafd92da3bd303464 /drivers | |
| parent | c526c216fef0022611b0b7cd0f68d103e3378b49 (diff) | |
| download | linux-d20f7807996c69537e07443ef8dec4e01a28b099.tar.xz | |
usb: chipidea: otg: add a_alt_hnp_support response for B device
This patch adds response to a_alt_hnp_support set feature request from legacy
A device, that is, B-device can provide a message to the user indicating that
the user needs to connect the B-device to an alternate port on the A-device.
A device sets this feature indicates to the B-device that it is connected
to an A-device port that is not capable of HNP, but that the A-device does have
an alternate port that is capable of HNP.
[Peter]
Without this patch, the OTG B device can't be enumerated on
non-HNP port at A device, see below log:
[ 2.287464] usb 1-1: Dual-Role OTG device on non-HNP port
[ 2.293105] usb 1-1: can't set HNP mode: -32
[ 2.417422] usb 1-1: new high-speed USB device number 4 using ci_hdrc
[ 2.460635] usb 1-1: Dual-Role OTG device on non-HNP port
[ 2.466424] usb 1-1: can't set HNP mode: -32
[ 2.587464] usb 1-1: new high-speed USB device number 5 using ci_hdrc
[ 2.630649] usb 1-1: Dual-Role OTG device on non-HNP port
[ 2.636436] usb 1-1: can't set HNP mode: -32
[ 2.641003] usb usb1-port1: unable to enumerate USB device
Cc: stable <stable@vger.kernel.org>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index ff451048c1ac..4bfb7ac0239f 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -929,6 +929,13 @@ __acquires(hwep->lock) return retval; } +static int otg_a_alt_hnp_support(struct ci_hdrc *ci) +{ + dev_warn(&ci->gadget.dev, + "connect the device to an alternate port if you want HNP\n"); + return isr_setup_status_phase(ci); +} + /** * isr_setup_packet_handler: setup packet handler * @ci: UDC descriptor @@ -1061,6 +1068,10 @@ __acquires(ci->lock) ci); } break; + case USB_DEVICE_A_ALT_HNP_SUPPORT: + if (ci_otg_is_fsm_mode(ci)) + err = otg_a_alt_hnp_support(ci); + break; default: goto delegate; } |