Hi Sebastian & Andrzej,
I have tried configfs today, and have some puzzled about its
behaviour, hope I can get answers from your both, thanks.
I am running the latest usb-next tree (3.15-rc3), and build
configfs as module, and enabled mass storage and serial, I follow
the instruction of ocumentation/usb/gadget_configfs.txt
The step at the board:
root@freescale ~$ modprobe libcomposite
root@freescale ~$ mount none /sys/kernel/config/ -t configfs
root@freescale ~$ mkdir /sys/kernel/config/usb_gadget/g1
root@freescale ~$ cd /sys/kernel/config/usb_gadget/g1/
root@freescale /sys/kernel/config/usb_gadget/g1$ echo 0x15a2 > idVendor
root@freescale /sys/kernel/config/usb_gadget/g1$ echo 0x0054 > idProduct
root@freescale /sys/kernel/config/usb_gadget/g1$ mkdir strings/0x409
root@freescale /sys/kernel/config/usb_gadget/g1$ echo 123456ABCDEF >
strings/0x4
09/serialnumber
root@freescale /sys/kernel/config/usb_gadget/g1$ echo Freescale >
strings/0x409/
manufacturer
root@freescale /sys/kernel/config/usb_gadget/g1$ echo "FSL i.mx6q
sabreSD Board"
> strings/0x409/product
root@freescale /sys/kernel/config/usb_gadget/g1$ echo 5 >
configs/c.1/MaxPower
root@freescale /sys/kernel/config/usb_gadget/g1$ mkdir
functions/mass_storage.1
Number of LUNs=8
Mass Storage Function, version: 2009/09/11
LUN: removable file: (no medium)
root@freescale /sys/kernel/config/usb_gadget/g1$ echo
"/dev/mmcblk0p1" > functio
ns/mass_storage.1/lun.0/file
root@freescale /sys/kernel/config/usb_gadget/g1$ mkdir
functions/gser.1
root@freescale /sys/kernel/config/usb_gadget/g1$ cat
functions/gser.1/port_num
0
root@freescale /sys/kernel/config/usb_gadget/g1$ lsmod
Module Size Used by
usb_f_serial 2974 2
u_serial 10032 1 usb_f_serial
usb_f_mass_storage 38373 2
libcomposite 37503 10 usb_f_serial,usb_f_mass_storage
root@freescale /sys/kernel/config/usb_gadget/g1$ ls /sys/class/udc/
ci_hdrc.0
root@freescale /sys/kernel/config/usb_gadget/g1$ echo "ci_hdrc.0" > UDC
root@freescale /sys/kernel/config/usb_gadget/g1$ configfs-gadget gadget:
high-speed config #2: c
At Linux PC:
b29397@nchen-desktop:~$ lsusb -d 15a2:0054 -v
Bus 001 Device 064: ID 15a2:0054 Freescale Semiconductor, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 0.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x15a2 Freescale Semiconductor, Inc.
idProduct 0x0054
bcdDevice 3.15
iManufacturer 1 Freescale
iProduct 2 FSL i.mx6q sabreSD Board
iSerial 3 123456ABCDEF
bNumConfigurations 2
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 6mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
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 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 2
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 5 Mass Storage
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Device Status: 0x0000
My questions:
- Why mass storage has been chosen at PC, but not gserial?
- Is it possible both two configurations can be seen at PC?
If possible, how to do?
- How to choose gserial? I tried to remove the configuration
of mass storage, but both of configurations have been removed
root@freescale /sys/kernel/config/usb_gadget/g1$ rm -rf
configs/c.2/mass_storage
.1/
configfs-gadget gadget: unbind function 'gser'/be822b80
configfs-gadget gadget: unbind function 'Mass Storage Function'/be822d80
--
Best Regards,
Peter Chen
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