projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| d4c687e2 WJS |
1 | Exar USB Serial Driver |
| 2 | ====================== | |
| 3 | Version 1A, 1/9/2015 | |
| 4 | ||
| 5 | This driver will work with any USB UART function in these Exar devices: | |
| 6 | XR21V1410/1412/1414 | |
| 7 | XR21B1411 | |
| 8 | XR21B1420/1422/1424 | |
| 9 | XR22801/802/804 | |
| 10 | ||
| 11 | The source code has been tested on various Linux kernels from 3.6.x to 3.17.x. | |
| 12 | This may also work with newer kernels as well. | |
| 13 | ||
| 14 | ||
| 15 | Installation | |
| 16 | ------------ | |
| 17 | ||
| 18 | * Compile and install the common usb serial driver module | |
| 19 | ||
| 20 | # make | |
| 21 | # insmod ./xr_usb_serial_common.ko | |
| 22 | ||
| 23 | ||
| 24 | * Plug the device into the USB host. You should see up to four devices created, | |
| 25 | typically /dev/ttyXRUSB[0-3]. | |
| 26 | ||
| 27 | ||
| 28 | Tips for Debugging | |
| 29 | ------------------ | |
| 30 | ||
| 31 | * Check that the USB UART is detected by the system | |
| 32 | ||
| 33 | # lsusb | |
| 34 | ||
| 35 | * Check that the CDC-ACM driver was not installed for the Exar USB UART | |
| 36 | ||
| 37 | # ls /dev/tty* | |
| 38 | ||
| 39 | To remove the CDC-ACM driver and install the driver: | |
| 40 | ||
| 41 | # rmmod cdc-acm | |
| 42 | # modprobe -r usbserial | |
| 43 | # modprobe usbserial | |
| 44 | # insmod ./xr_usb_serial_common.ko | |
| 45 | ||
| 46 | ||
| 47 | Technical Support | |
| 48 | ----------------- | |
| 49 | Send any technical questions/issues to uarttechsupport@exar.com. | |
| 50 |