Hi Jagan,
This is my case, acm If# is not mapped to interface desc given from device.
So I put "acm" to first order then the acm interface can be located at first
one (If# = 0) on desktop side.
Desktop side
cat /sys/kernel/debug/usb/devices
S: Product=Android HSUSB Device
S: SerialNumber=1234567890ABCDEF
C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
A: FirstIf#= 0 IfCount= 2 Cls=02(comm.) Sub=02 Prot=01
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=cdc_acm
E: Ad=82(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
I:* If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=usbfs
E: Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
Device side,
static char *usb_functions_all[] = {
#ifdef CONFIG_USB_ANDROID_ACM
"acm",
#endif
#ifdef CONFIG_USB_ANDROID_RNDIS
"rndis",
#endif
"usb_mass_storage",
#ifdef CONFIG_USB_ANDROID_DIAG
"diag",
#endif
"adb",
#ifdef CONFIG_USB_F_SERIAL
"modem",
"nmea",
#endif
#ifdef CONFIG_USB_ANDROID_RMNET
"rmnet",
#endif
};
br,
Chihchia
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