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ANDROID: GKI: Add API usb_ep_autoconfig_by_name

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Also resolves ABI diff for struct usb_ep.

Test: make
Bug: 151977927
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Change-Id: I808d04f8a9dc6e4eac70cbb5a8c8a304e18531b1
(cherry picked from commit 62523500193e11a8837d4c76ef4a42be2ca4ea0f)
[hridya: commit amended to only include ABI diff
EXPORT_SYMBOL -> EXPORT_SYMBOL_GPL]
Signed-off-by: Hridya Valsaraju <hridya@google.com>
This commit is contained in:
Hridya Valsaraju
2020-03-18 15:32:20 -07:00
parent 7ff8c34945
commit 34f6bfd951
2 changed files with 55 additions and 0 deletions
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38
drivers/usb/gadget/epautoconf.c
View File

@@ -205,3 +205,41 @@ void usb_ep_autoconfig_reset (struct usb_gadget *gadget)
gadget->out_epnum = 0;
}
EXPORT_SYMBOL_GPL(usb_ep_autoconfig_reset);
/**
* usb_ep_autoconfig_by_name - Used to pick the endpoint by name. eg ep1in-gsi
* @gadget: The device to which the endpoint must belong.
* @desc: Endpoint descriptor, with endpoint direction and transfer mode
* initialized.
* @ep_name: EP name that is to be searched.
*
*/
struct usb_ep *usb_ep_autoconfig_by_name(
struct usb_gadget *gadget,
struct usb_endpoint_descriptor *desc,
const char *ep_name
)
{
struct usb_ep *ep;
bool ep_found = false;
list_for_each_entry(ep, &gadget->ep_list, ep_list)
if (strcmp(ep->name, ep_name) == 0 && !ep->driver_data) {
ep_found = true;
break;
}
if (ep_found) {
desc->bEndpointAddress &= USB_DIR_IN;
desc->bEndpointAddress |= ep->ep_num;
ep->address = desc->bEndpointAddress;
pr_debug("Allocating ep address:%x\n", ep->address);
ep->desc = NULL;
ep->comp_desc = NULL;
return ep;
}
pr_err("%s:error finding ep %s\n", __func__, ep_name);
return NULL;
}
EXPORT_SYMBOL_GPL(usb_ep_autoconfig_by_name);

17
include/linux/usb/gadget.h
View File

@@ -184,6 +184,11 @@ struct usb_ep_caps {
.dir_out = !!(_dir & USB_EP_CAPS_DIR_OUT), \
}
enum ep_type {
EP_TYPE_NORMAL = 0,
EP_TYPE_GSI,
};
/**
* struct usb_ep - device side representation of USB endpoint
* @name:identifier for the endpoint, such as "ep-a" or "ep9in-bulk"
@@ -209,6 +214,11 @@ struct usb_ep_caps {
* enabled and remains valid until the endpoint is disabled.
* @comp_desc: In case of SuperSpeed support, this is the endpoint companion
* descriptor that is used to configure the endpoint
* @ep_type: Used to specify type of EP eg. normal vs h/w accelerated.
* @ep_num: Used EP number
* @ep_intr_num: Interrupter number for EP.
* @endless: In case where endless transfer is being initiated, this is set
* to disable usb event interrupt for few events.
*
* the bus controller driver lists all the general purpose endpoints in
* gadget->ep_list. the control endpoint (gadget->ep0) is not in that list,
@@ -232,6 +242,10 @@ struct usb_ep {
u8 address;
const struct usb_endpoint_descriptor *desc;
const struct usb_ss_ep_comp_descriptor *comp_desc;
enum ep_type ep_type;
u8 ep_num;
u8 ep_intr_num;
bool endless;
};
/*-------------------------------------------------------------------------*/
@@ -883,5 +897,8 @@ extern struct usb_ep *usb_ep_autoconfig_ss(struct usb_gadget *,
extern void usb_ep_autoconfig_release(struct usb_ep *);
extern void usb_ep_autoconfig_reset(struct usb_gadget *);
extern struct usb_ep *usb_ep_autoconfig_by_name(struct usb_gadget *gadget,
struct usb_endpoint_descriptor *desc,
const char *ep_name);
#endif /* __LINUX_USB_GADGET_H */