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1-Wire adapter
ftdi_sio kernel patch for ECLO Adapters

This will depend on the ftdi_sio version you have.

Please check if the ECLO PID and VID are present in the driver source files.

    grep -r -I "ECLO" /usr/src/linux/drivers/*

If the entries are there, you are home free.


If not, we'll need to patch the driver source, compile the module, and reload it.
Find the correct directory:
    cd /usr/src/linux/drivers/usb/serial
and modify two files: ftdi_sio.h and ftdo_sio.c

----------
ftdi_sio.h
----------
/*
* Eclo COM to 1-Wire USB adapter
*/
#define ECLO_1WIRE_USB_ADAPTER_PID 0xea90 /* Eclo COM to 1-Wire USB adapter */
#define ECLO_VID 0x0403 /* Eclo VID, same as FTDI VID */

----------
ftdi_sio.c
----------
static struct usb_device_id id_table_FT232BM [] = {
    ...
    { USB_DEVICE_VER(ECLO_VID, ECLO_1WIRE_USB_ADAPTER_PID, 0x400, 0xffff) },
    ...
    { } /* Terminating entry */
};

static struct usb_device_id id_table_combined [] = {
    ...
    { USB_DEVICE(ECLO_VID, ECLO_1WIRE_USB_ADAPTER_PID) },
    ...
    { } /* Terminating entry */
};

Basically, we are adding entries to the tables of recognized usb-serial devices for ECLO's product and vendor ID. The underlying code is unchanged.

Rebuild the driver:

    cd /usr/local/src
    make modules
    make modules_install

then remove the currently loaded module
    rmmod ftdi_sio
and relode the new module
    modprobe ftdi_sio
Plug in your adapter and look at the system log
    tail /var/log/messages
or
    dmesg
for the device assignment.
On my machine I see an entry like:

Jun 11 10:40:10 k2 kernel: usb 2-2.1: new full speed USB device using address 13
Jun 11 10:40:10 k2 kernel: usb 2-2.1: Product: Eclo COM to 1-Wire USB adapter
Jun 11 10:40:10 k2 kernel: usb 2-2.1: Manufacturer: Eclo
Jun 11 10:40:10 k2 kernel: usb 2-2.1: SerialNumber: 04000220
Jun 11 10:40:10 k2 kernel: usbserial_generic 2-2.1:1.0: FTDI FT232BM Compatible converter detected
Jun 11 10:40:10 k2 kernel: usb 2-2.1: FTDI FT232BM Compatible converter now attached to ttyUSB1


So I can run OWFS with a command like:
    /opt/owfs/bin/owfs /dev/ttyUSB1 /mnt/1wire

You may find useful the utility USBView for testing out USB and the drivers. Please download it at: http://www.kroah.com/linux-usb/

© 2003 Paul H. Alfille and The owfs Team
$Id: adapters.html,v 1.5 2005/02/23 04:45:53 alfille Exp $