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usb: gadget: move non-super speed code out of usb_ep_autoconfig_ss()

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The moved code refers to non-super speed endpoints only. This patch also
makes the comment stress the fact, that autoconfigured descriptor might
need some adjustments.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Andrzej Pietrasiewicz 2019-01-31 15:53:39 +01:00 committed by Felipe Balbi
parent 44a9d1b9a6
commit dffe2d7fc4
1 changed files with 24 additions and 17 deletions
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41
drivers/usb/gadget/epautoconf.c
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@ -67,9 +67,6 @@ struct usb_ep *usb_ep_autoconfig_ss(
)
{
struct usb_ep *ep;
u8 type;
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
if (gadget->ops->match_ep) {
ep = gadget->ops->match_ep(gadget, desc, ep_comp);
@ -109,16 +106,6 @@ found_ep:
desc->bEndpointAddress |= gadget->out_epnum;
}
/* report (variable) full speed bulk maxpacket */
if ((type == USB_ENDPOINT_XFER_BULK) && !ep_comp) {
int size = ep->maxpacket_limit;
/* min() doesn't work on bitfields with gcc-3.5 */
if (size > 64)
size = 64;
desc->wMaxPacketSize = cpu_to_le16(size);
}
ep->address = desc->bEndpointAddress;
ep->desc = NULL;
ep->comp_desc = NULL;
@ -152,9 +139,10 @@ EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss);
*
* On success, this returns an claimed usb_ep, and modifies the endpoint
* descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
* is initialized as if the endpoint were used at full speed. To prevent
* the endpoint from being returned by a later autoconfig call, claims it
* by assigning ep->claimed to true.
* is initialized as if the endpoint were used at full speed. Because of
* that the users must consider adjusting the autoconfigured descriptor.
* To prevent the endpoint from being returned by a later autoconfig call,
* claims it by assigning ep->claimed to true.
*
* On failure, this returns a null endpoint descriptor.
*/
@ -163,7 +151,26 @@ struct usb_ep *usb_ep_autoconfig(
struct usb_endpoint_descriptor *desc
)
{
return usb_ep_autoconfig_ss(gadget, desc, NULL);
struct usb_ep *ep;
u8 type;
ep = usb_ep_autoconfig_ss(gadget, desc, NULL);
if (!ep)
return NULL;
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
/* report (variable) full speed bulk maxpacket */
if (type == USB_ENDPOINT_XFER_BULK) {
int size = ep->maxpacket_limit;
/* min() doesn't work on bitfields with gcc-3.5 */
if (size > 64)
size = 64;
desc->wMaxPacketSize = cpu_to_le16(size);
}
return ep;
}
EXPORT_SYMBOL_GPL(usb_ep_autoconfig);