Using the HL-340 USB-serial adapter with Linux (1a86:7523, driver ch341)

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Monday, June 9. 2008

Using the HL-340 USB-serial adapter with Linux (1a86:7523, driver ch341)

Here is what dmesg reports :

New USB device found, idVendor=1a86, idProduct=7523
New USB device strings: Mfr=0, Product=2, SerialNumber=0
Product: USB2.0-Ser!

It works fine with the ch341 driver, I just had to add one line to drivers/usb/serial/ch341.c:

static struct usb_device_id id_table [] = {
        { USB_DEVICE(0x4348, 0x5523) },
        { USB_DEVICE(0x1a86, 0x7523) },
        { },
};

The relevant lines from my .config are:

CONFIG_USB_SERIAL=m
CONFIG_USB_SERIAL_GENERIC=y
CONFIG_USB_SERIAL_CH341=m

From the module comments:

ch341.c implements a serial port driver for the Winchiphead CH341.

The CH341 device can be used to implement an RS232 asynchronous serial port, an IEEE-1284 parallel printer port or a memory-like interface. In all cases the CH341 supports an I2C interface as well. This driver only supports the asynchronous serial interface.

I'm currently using a "vanilla" kernel 2.6.25.4.

Posted by crox at 13:07 | Comment (1) | Trackbacks (0)

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With the new 2.6.26 kernel you don't need to change anything, it's already there.

#1 crox (Link) on 2008-07-19 23:06 (Reply)

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