From 78abf14fc2ff577d0385f36fe91769d458fbc4a5 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Wed, 19 Jul 2017 21:50:07 +0800 Subject: usb: cmd: Print actual packet size for super speed devices USB 3.0 defines bMaxPacketSize0 field in the device descriptor as the exponent of 2, so let's print the calculated actual size. Signed-off-by: Bin Meng Reviewed-by: Simon Glass Reviewed-by: Stefan Roese Tested-by: Stefan Roese diff --git a/cmd/usb.c b/cmd/usb.c index 4fa456e..992d414 100644 --- a/cmd/usb.c +++ b/cmd/usb.c @@ -150,6 +150,8 @@ static void usb_display_string(struct usb_device *dev, int index) static void usb_display_desc(struct usb_device *dev) { + uint packet_size = dev->descriptor.bMaxPacketSize0; + if (dev->descriptor.bDescriptorType == USB_DT_DEVICE) { printf("%d: %s, USB Revision %x.%x\n", dev->devnum, usb_get_class_desc(dev->config.if_desc[0].desc.bInterfaceClass), @@ -171,9 +173,10 @@ static void usb_display_desc(struct usb_device *dev) usb_get_class_desc( dev->config.if_desc[0].desc.bInterfaceClass)); } + if (dev->descriptor.bcdUSB >= cpu_to_le16(0x0300)) + packet_size = 1 << packet_size; printf(" - PacketSize: %d Configurations: %d\n", - dev->descriptor.bMaxPacketSize0, - dev->descriptor.bNumConfigurations); + packet_size, dev->descriptor.bNumConfigurations); printf(" - Vendor: 0x%04x Product 0x%04x Version %d.%d\n", dev->descriptor.idVendor, dev->descriptor.idProduct, (dev->descriptor.bcdDevice>>8) & 0xff, -- cgit v0.10.2