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| author | Martin Geleynse <mgeleyns@ndigital.com> | 2009-07-02 13:10:35 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-07-12 15:16:39 -0700 |
| commit | b760dac290c3482e6883d5f79a2357c82239a3ff (patch) | |
| tree | 6065446d10300f058706a8be30f5444003a7a8da /drivers/usb/serial/ftdi_sio.h | |
| parent | e12df02a171d1c10ee664e6571c0e4cb7e1b7c92 (diff) | |
| download | linux-b760dac290c3482e6883d5f79a2357c82239a3ff.tar.gz | |
USB: ftdi: support NDI devices
It enhances the driver for FTDI-based USB serial adapters to recognize and
support Northern Digital Inc (NDI) measurement equipment. NDI has been
providing this patch for various kernel flavors for several years and we would
like to see these changes built in to the driver so that our equipement works
without the need for customers to patch the kernel themselves.
The patch makes small modifications to 2 files: ./drivers/usb/serial/ftdi_sio.c
and ./drivers/usb/serial/ftdi_sio.h. It accomplishes 3 things:
1. Define the VID and PIDs to allow the driver to recognize the NDI devices.
2. Map the 19200 baud rate setting to our higher baud rate of 1.2Mb
We would have chosen to map 38400 to the higher rate, similar to what
several other vendors have done, but some of our legacy customers actually
use 38400, therefore we remap 19200 to the higher rate.
3. We set the default transmit latency in the FTDI chip to 1ms for our devices.
Our devices are typically polled at 60Hz and the default ftdi latency
seriously affects turn-around time and results in missed data frames. We
have created a modprobe option that allows this setting to be increased.
This has proven necessary particularly in some virtualized environments.
Signed-off-by: Martin P. Geleynse <mgeleyns@ndigital.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.h')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h index 62f05e66ddac5..36dc7cd3499aa 100644 --- a/drivers/usb/serial/ftdi_sio.h +++ b/drivers/usb/serial/ftdi_sio.h @@ -740,6 +740,15 @@ #define FTDI_PYRAMID_PID 0xE6C8 /* Pyramid Appliance Display */ /* + * NDI (www.ndigital.com) product ids + */ +#define FTDI_NDI_HUC_PID 0xDA70 /* NDI Host USB Converter */ +#define FTDI_NDI_SPECTRA_SCU_PID 0xDA71 /* NDI Spectra SCU */ +#define FTDI_NDI_FUTURE_2_PID 0xDA72 /* NDI future device #2 */ +#define FTDI_NDI_FUTURE_3_PID 0xDA73 /* NDI future device #3 */ +#define FTDI_NDI_AURORA_SCU_PID 0xDA74 /* NDI Aurora SCU */ + +/* * Posiflex inc retail equipment (http://www.posiflex.com.tw) */ #define POSIFLEX_VID 0x0d3a /* Vendor ID */ @@ -852,9 +861,6 @@ #define TML_VID 0x1B91 /* Vendor ID */ #define TML_USB_SERIAL_PID 0x0064 /* USB - Serial Converter */ -/* NDI Polaris System */ -#define FTDI_NDI_HUC_PID 0xDA70 - /* Propox devices */ #define FTDI_PROPOX_JTAGCABLEII_PID 0xD738 |