On 12/09/2013 06:34 PM, Michal Nazarewicz wrote:
> dOn Tue, Dec 10 2013, David Cohen wrote:
>> Due to USB controllers may have different restrictions, usb gadget layer
>> needs to provide a generic way to inform gadget functions to complain
>> with non-standard requirements.
>>
>> This patch adds 'quirk_ep_out_aligned_size' field to struct usb_gadget
>> to inform when controller's epout requires buffer size to be aligned to
>> MaxPacketSize. A helper is also provided to align buffer size when
>> necessary.
>>
>> Signed-off-by: David Cohen <david.a.cohen@xxxxxxxxxxxxxxx>
>> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
>> Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
>
> Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
>
>> ---
>> include/linux/usb/gadget.h | 20 ++++++++++++++++++++
>> 1 file changed, 20 insertions(+)
>>
>> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
>> index 23b3bfd0a842..cae8a6216551 100644
>> --- a/include/linux/usb/gadget.h
>> +++ b/include/linux/usb/gadget.h
>> @@ -502,6 +502,8 @@ struct usb_gadget_ops {
>> * only supports HNP on a different root port.
>> * @b_hnp_enable: OTG device feature flag, indicating that the A-Host
>> * enabled HNP support.
>> + * @quirk_ep_out_aligned_size: epout requires buffer size to be aligned to
>> + * MaxPacketSize.
>> *
>> * Gadgets have a mostly-portable "gadget driver" implementing device
>> * functions, handling all usb configurations and interfaces. Gadget
>> @@ -541,6 +543,7 @@ struct usb_gadget {
>> unsigned b_hnp_enable:1;
>> unsigned a_hnp_support:1;
>> unsigned a_alt_hnp_support:1;
>> + unsigned quirk_ep_out_aligned_size:1;
>> };
>> #define work_to_gadget(w) (container_of((w), struct usb_gadget, work))
>>
>> @@ -559,6 +562,23 @@ static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev)
>>
>>
>> /**
>> + * usb_ep_align_maybe - returns @len aligned to ep's maxpacketsize if gadget
>> + * requires quirk_ep_out_aligned_size, otherwise reguens len.
>
> “returns”
I've got no idea how returns became reguens :)
But maybe Felipe can fix it when applying?
Br, David
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