Add the ability to print the MaxStreams and Mult fields from the
SuperSpeed Endpoint Companion Descriptors. Only print them for the
correct endpoint types (MaxStreams is only valid for bulk endpoints, and
Mult is only valid for isochronous endpoints).
TODO: Print wBytesPerInterval from the SuperSpeed Endpoint Companion
Descriptor.
Sample output for a USB Attached SCSI device prototype with an alt setting
that supports bulk streams looks like:
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 4
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 98
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 1
INTERFACE CLASS: 04 24 01 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 16
MaxStreams 65536
INTERFACE CLASS: 04 24 03 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 6
MaxStreams 65536
INTERFACE CLASS: 04 24 04 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 1
MaxStreams 65536
INTERFACE CLASS: 04 24 02 00
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
Now with less pow!
Sarah
lsusb.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/lsusb.c b/lsusb.c
index a25ad69..a739859 100644
--- a/lsusb.c
+++ b/lsusb.c
@@ -770,6 +770,15 @@ static void dump_endpoint(struct usb_dev_handle *dev, struct usb_interface_descr
break;
case USB_DT_SS_ENDPOINT_COMP:
printf(" bMaxBurst %15u\n", buf[2] + 1);
+ /* Print bulk streams info or isoc "Mult" */
+ if ((endpoint->bmAttributes & 3) == 2 &&
+ (buf[3] & 0x1f))
+ printf(" MaxStreams %14u\n",
+ (unsigned) 1 << buf[3]);
+ if ((endpoint->bmAttributes & 3) == 1 &&
+ (buf[3] & 0x3))
+ printf(" Mult %20u\n",
+ buf[3] & 0x3);
break;
default:
/* often a misplaced class descriptor */
--
1.6.3.3
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