[PATCH v8 05/23] usb: gadget: composite: add USB_DT_OTG request handling
DORMANTno replies
REVIEWED: 1 (0M)
From: Li Jun <hidden>
Date: 2015-07-23 03:37:29
Subsystem:
the rest, usb subsystem · Maintainers:
Linus Torvalds, Greg Kroah-Hartman
1 review trailer.
From: Macpaul Lin <redacted> Copy usb_otg_descriptor from config's descriptor if host requests USB_DT_OTG. Signed-off-by: Macpaul Lin <redacted> Signed-off-by: Li Jun <redacted> Reviewed-by: Roger Quadros <redacted> --- drivers/usb/gadget/composite.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 4e3447b..2c1c6eb 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c@@ -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"
@@ -1534,6 +1535,32 @@ 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;
--
1.9.1
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