[U-Boot] [PATCH 3/4] SDP: fix wrong usb request size and add high speed endpoint descriptor

[Lukasz Majewski <lukma@denx.de>]

Hi Sherry,

> From: Sherry Sun <sherry.sun@nxp.com>
> 
> Because the buffer length of sdp usb request is 65, 

Is the value 65 mentioned somewhere (in any doc/spec)?

As fair as I remember other protocols - like DFU use 64B. Do we need
here to store extra \0 or \n ?

The 64 bytes are default packet size on EP0.


If I may ask - what user space program do you use? imx_loader (imx_usb)
or uuu ?

> we have to
> allocate 65 bytes not 64 bytes. Otherwise there is potential buffer
> overflow.
> 
> So the wMaxPacketSize of fullspeed can't meet the needs. Add HS
> endpoint descriptor for SDP. Then we can use high speed endpoint,
> and the SDP device can send packet with 512 byte size.
> 
> Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
> Signed-off-by: Ye Li <ye.li@nxp.com>
> ---
>  drivers/usb/gadget/f_sdp.c | 33 ++++++++++++++++++++++++++++++---
>  1 file changed, 30 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/gadget/f_sdp.c b/drivers/usb/gadget/f_sdp.c
> index b1601575e0..532041063a 100644
> --- a/drivers/usb/gadget/f_sdp.c
> +++ b/drivers/usb/gadget/f_sdp.c
> @@ -157,6 +157,16 @@ static struct usb_endpoint_descriptor in_desc = {
>  	.bInterval =		1,
>  };
>  
> +static struct usb_endpoint_descriptor in_hs_desc = {
> +	.bLength =		USB_DT_ENDPOINT_SIZE,
> +	.bDescriptorType =
> USB_DT_ENDPOINT, /*USB_DT_CS_ENDPOINT*/ +
> +	.bEndpointAddress =	1 | USB_DIR_IN,
> +	.bmAttributes =	USB_ENDPOINT_XFER_INT,
> +	.wMaxPacketSize =	512,
> +	.bInterval =		1,

Which endpoint do we use in SDP? EP0 or EP1...n ?

> +};
> +
>  static struct usb_descriptor_header *sdp_runtime_descs[] = {
>  	(struct usb_descriptor_header *)&sdp_intf_runtime,
>  	(struct usb_descriptor_header *)&sdp_hid_desc,
> @@ -164,6 +174,13 @@ static struct usb_descriptor_header
> *sdp_runtime_descs[] = { NULL,
>  };
>  
> +static struct usb_descriptor_header *sdp_runtime_hs_descs[] = {
> +	(struct usb_descriptor_header *)&sdp_intf_runtime,
> +	(struct usb_descriptor_header *)&sdp_hid_desc,
> +	(struct usb_descriptor_header *)&in_hs_desc,
> +	NULL,
> +};
> +
>  /* This is synchronized with what the SoC implementation reports */
>  static struct hid_report sdp_hid_report = {
>  	.usage_page = {
> @@ -489,6 +506,11 @@ static int sdp_bind(struct usb_configuration *c,
> struct usb_function *f) goto error;
>  	}
>  
> +	if (gadget_is_dualspeed(gadget)) {
> +		/* Assume endpoint addresses are the same for both
> speeds */
> +		in_hs_desc.bEndpointAddress =
> in_desc.bEndpointAddress;
> +	}
> +
>  	sdp->in_ep = ep; /* Store IN EP for enabling @ setup */
>  
>  	cdev->req->context = sdp;
> @@ -526,7 +548,7 @@ static struct usb_request *sdp_start_ep(struct
> usb_ep *ep) {
>  	struct usb_request *req;
>  
> -	req = alloc_ep_req(ep, 64);
> +	req = alloc_ep_req(ep, 65);
>  	debug("%s: ep:%p req:%p\n", __func__, ep, req);
>  
>  	if (!req)
> @@ -541,11 +563,15 @@ static int sdp_set_alt(struct usb_function *f,
> unsigned intf, unsigned alt) {
>  	struct f_sdp *sdp = func_to_sdp(f);
>  	struct usb_composite_dev *cdev = f->config->cdev;
> +	struct usb_gadget *gadget = cdev->gadget;
>  	int result;
>  
>  	debug("%s: intf: %d alt: %d\n", __func__, intf, alt);
>  
> -	result = usb_ep_enable(sdp->in_ep, &in_desc);
> +	if (gadget_is_dualspeed(gadget) && gadget->speed ==
> USB_SPEED_HIGH)
> +		result = usb_ep_enable(sdp->in_ep, &in_hs_desc);
> +	else
> +		result = usb_ep_enable(sdp->in_ep, &in_desc);
>  	if (result)
>  		return result;
>  	sdp->in_req = sdp_start_ep(sdp->in_ep);
> @@ -591,7 +617,7 @@ static int sdp_bind_config(struct
> usb_configuration *c) memset(sdp_func, 0, sizeof(*sdp_func));
>  
>  	sdp_func->usb_function.name = "sdp";
> -	sdp_func->usb_function.hs_descriptors = sdp_runtime_descs;
> +	sdp_func->usb_function.hs_descriptors = sdp_runtime_hs_descs;
>  	sdp_func->usb_function.descriptors = sdp_runtime_descs;
>  	sdp_func->usb_function.bind = sdp_bind;
>  	sdp_func->usb_function.unbind = sdp_unbind;
> @@ -724,6 +750,7 @@ static void sdp_handle_in_ep(struct
> spl_image_info *spl_image) /* In SPL, allow jumps to U-Boot images */
>  			struct spl_image_info spl_image = {};
>  			spl_parse_image_header(&spl_image, header);
> +
>  			jump_to_image_no_args(&spl_image);
>  #else
>  			/* In U-Boot, allow jumps to scripts */




Best regards,

Lukasz Majewski

--

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