On 18/04/16 10:08, Peter Chen wrote:
> On Tue, Apr 05, 2016 at 05:05:16PM +0300, Roger Quadros wrote:
>> This is the a_set_b_hnp_enable flag in the OTG state machine
>> diagram and must be set when the A-Host has successfully set
>> the b_hnp_enable feature of the OTG-B-Peripheral attached to it.
>>
>> When this bit changes we kick our OTG FSM to make note of the
>> change and act accordingly.
>
> Since we have still not added fsm.a_set_b_hnp_en in OTG FSM, and this
> patch set is mainly for DRD, would you please move out this patch from
> this set?
Sure.
cheers,
-roger
>
>>
>> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
>> ---
>> drivers/usb/core/hub.c | 17 +++++++++++++++--
>> 1 file changed, 15 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
>> index 38cc4ba..27e3b4c 100644
>> --- a/drivers/usb/core/hub.c
>> +++ b/drivers/usb/core/hub.c
>> @@ -2273,6 +2273,7 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
>> && udev->parent == udev->bus->root_hub) {
>> struct usb_otg_descriptor *desc = NULL;
>> struct usb_bus *bus = udev->bus;
>> + struct usb_hcd *hcd = bus_to_hcd(bus);
>> unsigned port1 = udev->portnum;
>>
>> /* descriptor may appear anywhere in config */
>> @@ -2302,6 +2303,9 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
>> dev_err(&udev->dev, "can't set HNP mode: %d\n",
>> err);
>> bus->b_hnp_enable = 0;
>> + } else {
>> + /* notify OTG fsm about a_set_b_hnp_enable */
>> + usb_otg_kick_fsm(hcd->otg_dev);
>> }
>> } else if (desc->bLength == sizeof
>> (struct usb_otg_descriptor)) {
>> @@ -2312,10 +2316,14 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
>> USB_DEVICE_A_ALT_HNP_SUPPORT,
>> 0, NULL, 0,
>> USB_CTRL_SET_TIMEOUT);
>> - if (err < 0)
>> + if (err < 0) {
>> dev_err(&udev->dev,
>> "set a_alt_hnp_support failed: %d\n",
>> err);
>> + } else {
>> + /* notify OTG fsm about a_set_b_hnp_enable */
>> + usb_otg_kick_fsm(hcd->otg_dev);
>> + }
>> }
>> }
>> #endif
>> @@ -4355,8 +4363,13 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
>> */
>> if (!hdev->parent) {
>> delay = HUB_ROOT_RESET_TIME;
>> - if (port1 == hdev->bus->otg_port)
>> + if (port1 == hdev->bus->otg_port) {
>> hdev->bus->b_hnp_enable = 0;
>> +#ifdef CONFIG_USB_OTG
>> + /* notify OTG fsm about a_set_b_hnp_enable change */
>> + usb_otg_kick_fsm(hcd->otg_dev);
>> +#endif
>> + }
>> }
>>
>> /* Some low speed devices have problems with the quick delay, so */
>> --
>> 2.5.0
>>
>> --
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