Re: [PATCH v3 04/22] usb: gadget: composite: add USB_DT_OTG request handling
From: Roger Quadros <hidden>
Date: 2015-06-16 07:30:40
On Tue, 16 Jun 2015 14:51:54 +0800 Li Jun [off-list ref] wrote:
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> cheers, -roger
quoted hunk
--- drivers/usb/gadget/composite.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 4e3447b..8322e80 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c@@ -1534,6 +1534,31 @@ 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_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;
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