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usb: gadget: composite: add USB_DT_OTG request handling 

Copy usb_otg_descriptor from config's descriptor if host requests
USB_DT_OTG.

Signed-off-by: Macpaul Lin <macpaul@gmail.com>
Signed-off-by: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Macpaul Lin 2015-07-09 15:18:42 +08:00 committed by Felipe Balbi
parent 84704bb3d1
commit 53e6242db8
1 changed files with 27 additions and 0 deletions
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27
drivers/usb/gadget/composite.c
View File

@ -19,6 +19,7 @@
#include <linux/utsname.h>
#include <linux/usb/composite.h>
#include <linux/usb/otg.h>
#include <asm/unaligned.h>
#include "u_os_desc.h"
@ -1540,6 +1541,32 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
value = min(w_length, (u16) value);
}
break;
case USB_DT_OTG:
if (gadget_is_otg(gadget)) {
struct usb_configuration *config;
int otg_desc_len = 0;
if (cdev->config)
config = cdev->config;
else
config = list_first_entry(
&cdev->configs,
struct usb_configuration, list);
if (!config)
goto done;
if (gadget->otg_caps &&
(gadget->otg_caps->otg_rev >= 0x0200))
otg_desc_len += sizeof(
struct usb_otg20_descriptor);
else
otg_desc_len += sizeof(
struct usb_otg_descriptor);
value = min_t(int, w_length, otg_desc_len);
memcpy(req->buf, config->descriptors[0], value);
}
break;
}
break;