USB mass storage gadget module not working properly

[shijinjustine]

Hi,

I am trying to access the storage area of boot and rootfs partition to a pc through OTG USB of A20-OLinuXino-MICRO. Right now, I am using  linux-sunxi-sunxi-3.4 debian source for the mass storage gadget.I configured in menuconfig as :

Device Drivers  --->
   

• USB support  --->
  
            <*>   Inventra Highspeed Dual Role Controller (TI, ADI, AW, ...)                       
            <*>    Platform Glue Layer (Allwinner SUN4I/SUN5I/SUN7I)  --->                       
                      MUSB DMA mode (Disable DMA (always use PIO))  --->
        
       <*>   USB Gadget Support  --->
        <M>   USB Gadget Drivers
        <M>     Mass Storage Gadget
  
  After booting up this image , Inserted the module :
  
  $ modprobe g_mass_storage file=/dev/mmcblk0p1,/dev/mmcblk0p2 removable=y
  
  It works perfectly and shows up the boot and rootfs partition of Olimex in the Ubuntu PC. when I unplug and plug-in the usb-to-mini-usb cable from pc to olimex board, it Doesn't show up any partition to mount in my PC.I also tried re-inserting the module but of no use. The storage shows up in PC only after booting up and modprobe is given for the first time.
  
  How to make g_mass_storage(Mass storage Gadget) module  work perfectly each time even after unplug and plug-in  of usb cable from pc to A20-OLinuXino-MICRO should not make any fault ??
  
  Any help on Mass storage Gadget is appreciated. its urgent 
  
  Thanks in advance,
  Shijin

[MBR]

Did you enabled the SUNXI USB2.0 Dual Role Controller (at the very bottom of USB support options) and the options inside? I haven't tried the USB gadgets, but this seem like vital component and it looks that this is handling the pluging and umpluging.

[shijinjustine]

Hi,

Thanks for the support

At first I used 'SUNXI USB2.0 Dual Role Controller support' but it freeze the device when I inserted the g_mass_storage module, only  because of that I choose  'Inventra Highspeed Dual Role Controller (TI, ADI, AW, ...)'

But later I found it works perfectly in 'SUNXI USB2.0 Dual Role Controller support' when adding 'stall=0' (halt bulk endpoints) with the modprobe.

$ modprobe g_mass_storage file=/dev/mmcblk0p1,/dev/mmcblk0p2 stall=0

[xbing6]

I am trying "stall=0", and it works as expected.

But, I have another problem. If I do modprobe with "stall=0" before connect Olimex USB to Ubuntu PC, PC can NOT recognize Olimex USB.

However, if I connect Olimex USB to PC first, then do "modprobe", and USB works fine.

Any comments?

Thanks.

[@sambeyond]

          <*>   Inventra Highspeed Dual Role Controller (TI, ADI, AW, ...)                       
          <*>    Platform Glue Layer (Allwinner SUN4I/SUN5I/SUN7I)  --->                       
                    MUSB DMA mode (Disable DMA (always use PIO))  --->
what is it use for???

at fisrt i do not add this driver:

when i run:    modprobe g_mass_storage file=/dev/nanda,/dev/nandb removable=y
failed to modprobe.

this is log:
root@cubie:~# [sw_udc]: [sw_udc]: [sw_usb_udc]: binding gadget driver 'g_mass_storage'
[sw_usb_udc]: binding gadget driver 'g_mass_storage'
[sw_udc]: [sw_udc]: alloc request: ep(0xc089d898, ep0, 64), req(0xeeaf4400)
alloc request: ep(0xc089d898, ep0, 64), req(0xeeaf4400)
usb open backing file: /dev/nanda, 0xeeb24800
usb open backing file: /dev/nanda, 0xeeb24800
usb open backing file: /dev/nandb, 0xeeb249b0
usb open backing file: /dev/nandb, 0xeeb249b0
<6>g_mass_storage gadget: Mass Storage Function, version: 2009/09/11
g_mass_storage gadget: Mass Storage Function, version: 2009/09/11
<6>g_mass_storage gadget: Number of LUNs=2
g_mass_storage gadget: Number of LUNs=2
<6> lun0: LUN: removable file: /dev/nanda
lun0: LUN: removable file: /dev/nanda
<6> lun1: LUN: removable file: /dev/nandb
lun1: LUN: removable file: /dev/nandb
ep_matches, wrn: endpoint already claimed, ep(0xc089d8e4, 0xbf16c380, ep1-bulk)
ep_matches, wrn: endpoint already claimed, ep(0xc089d8e4, 0xbf16c380, ep1-bulk)
<6>g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
<4>g_mass_storage gadget: userspace failed to provide iSerialNumber
g_mass_storage gadget: userspace failed to provide iSerialNumber
<6>g_mass_storage gadget: g_mass_storage ready
g_mass_storage gadget: g_mass_storage ready
[sw_udc]: [sw_udc]: usbd_start_work
usbd_start_work
[sw_udc]: [sw_udc]: IRQ: suspend
IRQ: suspend
[sw_udc]: [sw_udc]: ERR: usb speed is unkown
ERR: usb speed is unkown
[sw_udc]: [sw_udc]: IRQ: reset
IRQ: reset
[sw_udc]: [sw_udc]: irq: reset happen, throw away all urb
irq: reset happen, throw away all urb
[sw_udc]: [sw_udc]:
+++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++
[sw_udc]: [sw_udc]:  usb enter full speed.
usb enter full speed.
[sw_udc]: [sw_udc]:
+++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++
[sw_udc]: [sw_udc]: IRQ: reset
IRQ: reset
[sw_udc]: [sw_udc]: irq: reset happen, throw away all urb
irq: reset happen, throw away all urb
[sw_udc]: [sw_udc]: Set address 7
Set address 7
WRN:L1041(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):WRN:L1041(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):ERR: Operation not supported
ERR: Operation not supported
WRN:L1041(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):WRN:L1041(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):ERR: Operation not supported
ERR: Operation not supported
WRN:L1041(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):WRN:L1041(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):ERR: Operation not supported
ERR: Operation not supported
<6>g_mass_storage gadget: full-speed config #1: Linux File-Backed Storage
g_mass_storage gadget: full-speed config #1: Linux File-Backed Storage
[sw_udc]: [sw_udc]: ep enable: ep1(0xc089d8e4, ep1-bulk, 128, 64)
ep enable: ep1(0xc089d8e4, ep1-bulk, 128, 64)
[sw_udc]: [sw_udc]: ep enable: ep2(0xc089d930, ep2-bulk, 0, 64)
ep enable: ep2(0xc089d930, ep2-bulk, 0, 64)
[sw_udc]: [sw_udc]: alloc request: ep(0xc089d8e4, ep1-bulk, 64), req(0xedc3ec80)
alloc request: ep(0xc089d8e4, ep1-bulk, 64), req(0xedc3ec80)
[sw_udc]: [sw_udc]: alloc request: ep(0xc089d930, ep2-bulk, 64), req(0xedc3e300)
alloc request: ep(0xc089d930, ep2-bulk, 64), req(0xedc3e300)
[sw_udc]: [sw_udc]: alloc request: ep(0xc089d8e4, ep1-bulk, 64), req(0xedc3ecc0)
alloc request: ep(0xc089d8e4, ep1-bulk, 64), req(0xedc3ecc0)
[sw_udc]: [sw_udc]: alloc request: ep(0xc089d930, ep2-bulk, 64), req(0xedc3e440)
alloc request: ep(0xc089d930, ep2-bulk, 64), req(0xedc3e440)
WRN:L1355(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):WRN:L1355(/work/linux-sdk/linux-sunxi/drivers/usb/sunxi_usb/udc/sw_udc.c):handle_ep0: ep0 setup end
handle_ep0: ep0 setup end
nuke: ep num is 0
nuke: ep num is 0
<3>INFO: rcu_preempt detected stalls on CPUs/tasks:INFO: rcu_preempt detected stalls on CPUs/tasks:<c>

<3>     0: (1 GPs behind) idle=df5/1/0 drain=0 . timer=-1
        0: (1 GPs behind) idle=df5/1/0 drain=0 . timer=-1
<3>             <c>(detected by 1, t=6015 jiffies)
(detected by 1, t=6015 jiffies)
<3>INFO: Stall ended before state dump start
INFO: Stall ended before state dump start
<3>INFO: rcu_preempt detected stalls on CPUs/tasks:INFO: rcu_preempt detected stalls on CPUs/tasks:<c>

<3>     0: (1 GPs behind) idle=df5/1/0 drain=0 . timer=-1
        0: (1 GPs behind) idle=df5/1/0 drain=0 . timer=-1
<3>             <c>(detected by 1, t=24022 jiffies)
(detected by 1, t=24022 jiffies)
<3>INFO: Stall ended before state dump start
INFO: Stall ended before state dump start

[@sambeyond]

I use 3.4.79 - debian。

when I add this driver， and run：
modprobe g_mass_storage /dev/nanda,/dev/nandb removalbe=y  or modprobe g_mass_storage

ERROR: could not insert 'g_mass_storage': No such device

it is strange, i can find /lib/modules/3.4.79/kernel/driver/usb/gadget/g_mass_storage.ko

does you see this??