Hi guys,
I’w working with a Quectel EC21 modem and i ran into an issue that the qcserial
driver is not getting installed for it.
Previously i was working with the Quectel EC20 which was working properly but
the cell carrier requested LTE Cat 1 modem so that’s why the switch to EC21.
Can you add the product ID for the Quectel EC21 in the qcserial.c ?
Thanks,
Bali
Below info for Quectel EC21
root@raspberrypi:~# uname -a
Linux raspberrypi 4.9.13-v7+ #974 SMP Wed Mar 1 20:09:48 GMT 2017 armv7l
GNU/Linux
output for dmesg:
[ 7.575835] usb 1-1.4: new high-speed USB device number 7 using dwc_otg
[ 7.715808] usb 1-1.4: New USB device found, idVendor=2c7c, idProduct=0121
[ 7.715819] usb 1-1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 7.715824] usb 1-1.4: Product: Android
[ 7.715827] usb 1-1.4: Manufacturer: Android
[ 7.728580] usbcore: registered new interface driver cdc_wdm
[ 7.735897] qmi_wwan 1-1.4:1.4: cdc-wdm0: USB WDM device
[ 7.737829] qmi_wwan 1-1.4:1.4 wwan0: register 'qmi_wwan' at
usb-3f980000.usb-1.4, WWAN/QMI device, ce:db:66:0e:df:26
output for lsusb -t:
root@raspberrypi:~# lsusb -t
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 3, If 0, Class=Hub, Driver=hub/3p, 480M
|__ Port 1: Dev 5, If 0, Class=Vendor Specific Class,
Driver=smsc95xx, 480M
|__ Port 2: Dev 4, If 0, Class=Vendor Specific Class, Driver=ftdi_sio,
12M
|__ Port 3: Dev 6, If 0, Class=Mass Storage, Driver=usb-storage, 480M
|__ Port 4: Dev 7, If 1, Class=Vendor Specific Class, Driver=, 480M
|__ Port 4: Dev 7, If 4, Class=Vendor Specific Class, Driver=qmi_wwan,
480M
|__ Port 4: Dev 7, If 2, Class=Vendor Specific Class, Driver=, 480M
|__ Port 4: Dev 7, If 0, Class=Vendor Specific Class, Driver=, 480M
|__ Port 4: Dev 7, If 3, Class=Vendor Specific Class, Driver=, 480M
output for lsmod:
root@raspberrypi:~# lsmod
Module Size Used by
qmi_wwan 13643 0
cdc_wdm 12196 1 qmi_wwan
cfg80211 542899 0
rfkill 20851 1 cfg80211
sg 20761 0
mcp251x 10203 0
can_dev 13682 1 mcp251x
ftdi_sio 32899 0
usbserial 29943 1 ftdi_sio
i2c_bcm2835 7081 0
spi_bcm2835 7596 0
bcm2835_gpiomem 3940 0
uio_pdrv_genirq 3923 0
fixed 3285 0
uio 10204 1 uio_pdrv_genirq
rtc_ds1307 13908 0
hwmon 10552 1 rtc_ds1307
i2c_dev 6913 0
i2c_bcm2708 5994 0
fuse 99603 1
ipv6 406215 38
lsusb -v on EC21:
root@raspberrypi:~# lsusb -v
Bus 001 Device 007: ID 2c7c:0121
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2c7c
idProduct 0x0121
bcdDevice 3.18
iManufacturer 1 (error)
iProduct 2 (error)
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 209
bNumInterfaces 5
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
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
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 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 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 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 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 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 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x89 EP 9 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 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 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Status: 0x7538
(Bus Powered)
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