[PATCH] usb: gadget: USB3 support to the legacy printer driver
From: Jorge Ramirez-Ortiz
Date: Tue Nov 18 2014 - 09:19:47 EST
Hi Felipe/Greg
Thanks for your comments on my previous attempt.
I think I addressed them here.
I added some logs of a run captured on a recent kernel, fixed the indentations,
replaced the if/else with a switch statement and removed the copyright.
Note that the tests seem to indicate a performance issue on the net2280 driver: the
exact same tests using the usb338x.c driver from PLX allows for transfer speeds of 1Gbps.
cheers
Jorge
File transfer test using g_printer on 10b5:3380
================================================
The host will transfer a file to the device using the g_printer driver.
0) enable the net2280 on the g_printer:
--------------------------------------
From 8e306693839a77bfe3411a842d4d20acb9dae9e3 Mon Sep 17 00:00:00 2001
From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@xxxxxxxxxx>
Date: Mon, 17 Nov 2014 22:31:59 -0500
Subject: [PATCH] use the 338x
---
drivers/usb/gadget/legacy/printer.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/legacy/printer.c
b/drivers/usb/gadget/legacy/printer.c
index 456730b..ba919a0 100644
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -99,8 +99,8 @@ static struct printer_dev usb_printer_gadget;
/* Thanks to NetChip Technologies for donating this product ID.
*/
-#define PRINTER_VENDOR_NUM 0x0525 /* NetChip */
-#define PRINTER_PRODUCT_NUM 0xa4a8 /* Linux-USB Printer Gadget */
+#define PRINTER_VENDOR_NUM 0x10B5
+#define PRINTER_PRODUCT_NUM 0x3380
/* Some systems will want different product identifiers published in the
* device descriptor, either numbers or strings or both. These string
--
1.9.1
1) Host logs:
-------------
[jramirez@miro ~]$ lsusb
Bus 002 Device 006: ID 05ac:1303 Apple, Inc. iPod Shuffle 4.Gen
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 007: ID 10b5:3380 Comodo (PLX?)
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 0403:6001 Future Technology Devices International, Ltd FT232
USB-Serial (UART) IC
Bus 001 Device 003: ID 046d:0990 Logitech, Inc. QuickCam Pro 9000
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[jramirez@miro ~]$ lsusb -s 004:007 -v
Bus 004 Device 007: ID 10b5:3380 Comodo (PLX?)
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x10b5 Comodo (PLX?)
idProduct 0x3380
bcdDevice 3.18
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 44
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 7 Printer
bInterfaceSubClass 1 Printer
bInterfaceProtocol 2 Bidirectional
iInterface 0
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 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 0
[jramirez@miro host.git (master%)]$ sudo ./usbhost file.wav
[sudo] password for jramirez:
Opening device 10B5:3380...
Device properties:
bus number: 4
port path: 2 (from root hub)
device speed: 5000 Mbit/s (USB SuperSpeed)
Reading device descriptor:
length: 18
device class: 0
S/N: 3
VID:PID: 10B5:3380
bcdDevice: 0318
iMan:iProd:iSer: 1:2:3
nb confs: 1
Reading BOS descriptor: 2 caps
USB 2.0 extension:
attributes : 06
USB 3.0 capabilities:
attributes : 00
supported speeds : 000F
supported functionality: 01
Reading first configuration descriptor:
nb interfaces: 1
interface[0]: id = 0
interface[0].altsetting[0]: num endpoints = 2
Class.SubClass.Protocol: 07.01.02
endpoint[0].address: 81
max packet size: 0400
polling interval: 00
max burst: 00 (USB 3.0)
bytes per interval: 0000 (USB 3.0)
endpoint[1].address: 01
max packet size: 0400
polling interval: 00
max burst: 00 (USB 3.0)
bytes per interval: 0000 (USB 3.0)
Claiming interface 0...
Reading string descriptors:
String (0x01): "Linux 3.18.0-rc5+ with net2280"
String (0x02): "Printer Gadget"
Transfering: endpoint_out 1, size 61387314
- number of bulk transfers : 7494
- max user transfer size : 8192 bytes
- max usb transfer size : 1024 bytes
2) Device Logs:
--------------
[jramirez@dali ~]$ cat /proc/version
Linux version 3.18.0-rc5+ (jramirez@xxxxxxxxxxxxxxxxxxxxx) (gcc version 4.8.3
20140911 (Red Hat 4.8.3-7) (GCC) ) #1 SMP Mon Nov 17 21:59:22 EST 2014
[ 72.345683] net2280 0000:02:00.0: usb_reset_338x: Defect 7374 FsmValue 0xf0000000
[ 72.345706] net2280 0000:02:00.0: usb_reinit_338x: Defect 7374 FsmValue f0000000
[ 72.345748] net2280 0000:02:00.0: irq 35 for MSI/MSI-X
[ 72.345798] net2280 0000:02:00.0: PLX NET228x/USB338x USB Peripheral Controller
[ 72.345801] net2280 0000:02:00.0: irq 35, pci mem ffffc90004960000, chip rev 00ab
[ 72.345803] net2280 0000:02:00.0: version: 2005 Sept 27/v3.0; dma enabled legacy mode
[ 86.630589] printer gadget: Printer Gadget, version: 2007 OCT 06
[ 86.630593] printer gadget: printer ready
[ 86.630599] net2280 0000:02:00.0: Operate Defect 7374 workaround soft this time
[ 86.630600] net2280 0000:02:00.0: It will operate on cold-reboot and SS connect
[ 86.630709] net2280 0000:02:00.0: ep0_start_338x: Defect 7374 FsmValue 10000000
[ 86.870669] net2280 0000:02:00.0: INFO: Defect 7374 workaround waited about
[ 86.875065] printer gadget: super-speed config #1: printer
[ 86.875077] printer gadget: Using interface 0
[jramirez@dali device.git (master%)]$ sudo ./usbdevice
Receiving file
Transfer rate => 462 Mbits/sec [57MB/sec]
- file size : 58 MB
- time : 1.12 sec
As mentioned above, using the usb338x driver from PLX instead of the net2280 from
kernel.org, the effective file transfer rate increases 1Gbps.
3) Patch:
---------