Hi Vignesh,
-----Original Message----- From: Vignesh Raghavendra vigneshr@ti.com Sent: Friday, October 25, 2019 10:13 AM To: Michal Simek michals@xilinx.com; u-boot@lists.denx.de; git git@xilinx.com Cc: Marek Vasut marex@denx.de; T Karthik Reddy tkarthik@xilinx.com Subject: Re: [U-Boot] [PATCH] usb: composite: add BOS descriptor support to composite framework
Hi Michal,
On 14/10/19 6:22 PM, Michal Simek wrote:
From: T Karthik Reddy t.karthik.reddy@xilinx.com
To add usb-3.0 support to peripheral device add BOS & SS capability descriptors to gadget composite framework.
How was this patch tested? With what gadget function driver was this tested? I don't see *any* function drivers claiming SS support. (For e.g.: UMS only declares fsg_hs_bulk_in_desc but not fsg_ss_bulk_in_desc like in kernel), Without any function drivers claiming and implementing SS support how is this supposed to work? Or did I miss something?
Commit 771e76515ed5abe7eff73a54ccb0c9ae55f34388 has added support for detecting usb 3.0 device. For the enquiry from host we are sending bos descriptor to host as a part to support 3.0 & we have tested it with DFU function.
Regards T karthik
Regards Vignesh
Signed-off-by: T Karthik Reddy t.karthik.reddy@xilinx.com Signed-off-by: Siva Durga Prasad Paladugu siva.durga.paladugu@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com
drivers/usb/gadget/composite.c | 61
++++++++++++++++++++++++++++++----
include/linux/usb/ch9.h | 3 ++ include/linux/usb/gadget.h | 9 +++++ 3 files changed, 67 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index c7e762374752..618a7d5016ee 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -688,6 +688,57 @@ static void composite_setup_complete(struct
usb_ep *ep, struct usb_request *req)
req->status, req->actual, req->length); }+static int bos_desc(struct usb_composite_dev *cdev) {
- struct usb_ext_cap_descriptor *usb_ext;
- struct usb_bos_descriptor *bos = cdev->req->buf;
- bos->bLength = USB_DT_BOS_SIZE;
- bos->bDescriptorType = USB_DT_BOS;
- bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE);
- bos->bNumDeviceCaps = 0;
- /*
* A SuperSpeed device shall include the USB2.0 extension descriptor* and shall support LPM when operating in USB2.0 HS mode.*/- usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
- bos->bNumDeviceCaps++;
- le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE);
- usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
- usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
- usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
- usb_ext->bmAttributes =
cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT);- /*
* The Superspeed USB Capability descriptor shall be implemented* by all SuperSpeed devices.*/- if (gadget_is_superspeed(cdev->gadget)) {
struct usb_ss_cap_descriptor *ss_cap;ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);bos->bNumDeviceCaps++;le16_add_cpu(&bos->wTotalLength,USB_DT_USB_SS_CAP_SIZE);
ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;ss_cap->bmAttributes = 0; /* LTM is not supported yet */ss_cap->wSpeedSupported =cpu_to_le16(USB_LOW_SPEED_OPERATION |USB_FULL_SPEED_OPERATION |USB_HIGH_SPEED_OPERATION |USB_5GBPS_OPERATION);ss_cap->bFunctionalitySupport =USB_LOW_SPEED_OPERATION;
ss_cap->bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT;ss_cap->bU2DevExitLat =cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);- }
- return le16_to_cpu(bos->wTotalLength); }
/*
- The setup() callback implements all the ep0 functionality that's
- not handled lower down, in hardware or the hardware driver(like @@
-776,12 +827,10 @@ composite_setup(struct usb_gadget *gadget, const
struct usb_ctrlrequest *ctrl)
value = min(w_length, (u16) value); break; case USB_DT_BOS:
/** The USB compliance test (USB 2.0 CommandVerifier)
* issues this request. We should not run into the* default path here. But return for now until* the superspeed support is added.*/
if (gadget_is_superspeed(cdev->gadget))value = bos_desc(cdev);if (value >= 0)value = min(w_length, (u16)value); break;diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index 264c9712a33a..989a5fcbd966 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -878,6 +878,9 @@ struct usb_ss_cap_descriptor { /*
Link Power Management */
__le16 bU2DevExitLat; } __attribute__((packed));
+#define USB_DEFAULT_U1_DEV_EXIT_LAT 0x01 /* Less then 1
microsec */
+#define USB_DEFAULT_U2_DEV_EXIT_LAT 0x01F4 /* Less then
500 microsec */
#define USB_DT_USB_SS_CAP_SIZE 10
/* diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 497798a32a87..58bfaddd036a 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -566,6 +566,15 @@ static inline int gadget_is_otg(struct usb_gadget *g) #endif }
+/**
- gadget_is_superspeed() - return true if the hardware handles
+superspeed
- @g: controller that might support superspeed */ static inline int
+gadget_is_superspeed(struct usb_gadget *g) {
- return g->max_speed >= USB_SPEED_SUPER; }
/**
- usb_gadget_frame_number - returns the current frame number
- @gadget: controller that reports the frame number
-- Regards Vignesh