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usb: gadget: add 'quirk_altset_not_supp' to usb_gadget

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Due to some UDC controllers may not support altsettings, usb gadget layer
needs to provide a generic way to inform gadget functions about non-standard
hardware limitations.

This patch adds 'quirk_altset_not_supp' field to struct usb_gadget and helper
function gadget_is_altset_supported(). It also sets 'quirk_altset_not_supp'
to 1 in pxa25x_udc and pxa27x_udc drivers, which have such limitation.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Robert Baldyga
2015-07-28 07:19:58 +02:00
committed by Felipe Balbi
parent c0bd5456a4
commit ffd9a0fcbb
3 changed files with 13 additions and 0 deletions
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11
include/linux/usb/gadget.h
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@@ -572,6 +572,7 @@ struct usb_gadget {
unsigned a_hnp_support:1;
unsigned a_alt_hnp_support:1;
unsigned quirk_ep_out_aligned_size:1;
unsigned quirk_altset_not_supp:1;
unsigned is_selfpowered:1;
unsigned deactivated:1;
unsigned connected:1;
@@ -609,6 +610,16 @@ usb_ep_align_maybe(struct usb_gadget *g, struct usb_ep *ep, size_t len)
round_up(len, (size_t)ep->desc->wMaxPacketSize);
}
/**
* gadget_is_altset_supported - return true iff the hardware supports
* altsettings
* @g: controller to check for quirk
*/
static inline int gadget_is_altset_supported(struct usb_gadget *g)
{
return !g->quirk_altset_not_supp;
}
/**
* gadget_is_dualspeed - return true iff the hardware handles high speed
* @g: controller that might support both high and full speeds