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usb: cmd: Print actual packet size for super speed devices

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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 <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Bin Meng 2017-07-19 21:50:07 +08:00 committed by Marek Vasut
parent cbb89ed026
commit 78abf14fc2
1 changed files with 5 additions and 2 deletions
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7
cmd/usb.c
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@ -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,