EM7455 + Android Integration Failed

IoT Modules MC/EM Series
1

EM7455 connect on Single Board Computer(NanoPC-T2) through USB.

I have attached AndroidRIL_5.1.11 binary files in my android and kernel source after build it and run on my android device.Below error messages received on android Log:

<6>[ 2517.864000] usb 1-1.1: new high-speed USB device number 8 using nxp-ehci
<4>[ 2517.964000] usb 1-1.1: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64
<4>[ 2517.972000] usb 1-1.1: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64
<6>[ 2517.984000] usb 1-1.1: New USB device found, idVendor=1199, idProduct=9078
<6>[ 2517.988000] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
<6>[ 2517.996000] usb 1-1.1: Product: Sierra Wireless EM7455 Qualcomm
<6>[ 2518.004000] usb 1-1.1: Manufacturer: Sierra Wireless, Incorporated
<6>[ 2518.008000] usb 1-1.1: SerialNumber: LF70862203041020
<6>[ 2518.016000] usb 1-1.1: USB disconnect, device number 8
<7>[ 2518.020000] usb 1-1.1: usbfs: USBDEVFS_CONTROL failed cmd UsbService host rqt 128 rq 6 len 256 ret -71

Anyone known how to solve this error,help me. :unamused:
Thanks!

2

I have this exact same problem using an internal m.2 on the tegra k1 platform, if I use a usb-to-wwan these errors are not there. If someone has some insight please let us know :slight_smile:

 <4>[02-22 12:47:04.783] usb 2-3: config 1 has an invalid interface number: 8 but max is 3
<4>[02-22 12:47:04.783] usb 2-3: config 1 has no interface number 1
<3>[02-22 12:47:04.784] usb 2-3: string descriptor 0 read error: -71
<6>[02-22 12:47:04.784] usb 2-3: New USB device found, idVendor=1199, idProduct=9071
<6>[02-22 12:47:04.784] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
<3>[02-22 12:47:04.784] usb 2-3: can't set config #1, error -71
<6>[02-22 12:47:04.784] usb 2-3: USB disconnect, device number 2
<6>[02-22 12:47:04.784] usb 2-3: new high-speed USB device number 3 using tegra-xhci
<4>[02-22 12:47:04.784] usb 2-3: config 1 has an invalid interface number: 8 but max is 3
<4>[02-22 12:47:04.784] usb 2-3: config 1 has no interface number 1
<3>[02-22 12:47:04.784] usb 2-3: string descriptor 0 read error: -71
<6>[02-22 12:47:04.784] usb 2-3: New USB device found, idVendor=1199, idProduct=9071
<6>[02-22 12:47:04.784] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
<3>[02-22 12:47:04.784] usb 2-3: can't set config #1, error -71
<7>[02-22 12:47:04.784] usb 2-3: usbfs: USBDEVFS_CONTROL failed cmd UsbService host rqt 128 rq 6 len 256 ret -71
<7>[02-22 12:47:04.784] usb 2-3: usbfs: USBDEVFS_CONTROL failed cmd UsbService host rqt 128 rq 6 len 256 ret -71
3

Update latest firmware version. It will available in Sierra Wireless official website…

4

In my situation the newest firmware is not compatible with older android ril see Android RIL EM7455 LPM issues (SOLVED)

I am using android 5.1.1 and I have to use an older firmware version to work with the android sierra ril.

5

Hi,

Seems you are using Lenovo’s SKU modem, our RIL/Driver not support it yet. You may need ask Lenovo provide such support. Or get a model with generic SKU.

Thanks,

6

I am using the GENERIC sku for em7455 and I am still curious why on embedded boards with m.2 we get this error but not over usb to wwan adapter:

USBDEVFS_CONTROL failed cmd UsbService host rqt 128 rq 6 len 256 ret -71