On 7/17/07, Greg KH <[EMAIL PROTECTED]> wrote: > On Fri, Jul 13, 2007 at 10:20:11PM -0400, Xiaofan Chen wrote: > > On 4/27/07, Greg Kroah-Hartman <[EMAIL PROTECTED]> wrote: > > > From: Joey Goncalves <[EMAIL PROTECTED]> > > > > > >> Hi Greg: > > > > > > >I have found that /drivers/usb/misc/ldusb.c works with the "PICDEM Full > > > > Speed USB" > > > > http://www.microchip.com/stellent/idcplg? > > > > IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en021940 > > > > > > > > > Signed-off-by: Joey S Goncalves <[EMAIL PROTECTED]> > > > Cc: Michael Hund <[EMAIL PROTECTED]> > > > Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]> > > > --- > > > drivers/usb/misc/ldusb.c | 3 +++ > > > 1 files changed, 3 insertions(+), 0 deletions(-) > > > > > > diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c > > > index 788a11e..11555bd 100644 > > > --- a/drivers/usb/misc/ldusb.c > > > +++ b/drivers/usb/misc/ldusb.c > > > @@ -62,6 +62,8 @@ > > > #define USB_DEVICE_ID_VERNIER_SKIP 0x0003 > > > #define USB_DEVICE_ID_VERNIER_CYCLOPS 0x0004 > > > > > > +#define USB_VENDOR_ID_MICROCHIP 0x04d8 > > > +#define USB_DEVICE_ID_PICDEM 0x000c > > > > > > > PICDEM FS USB is a demo board from Microchip and it > > has many examples with different PID. is one > > of the example for the Demo mode. > > > > libusb works very well for the Demo mode (PID=0x000c) > > and the boot mode (PID=0x000b). > > > > More info of the libusb based application: > > > > PICDEM FS USB bootloader for Linux/Windows using libusb > > http://www.internetking.org/fsusb/ > > http://forum.microchip.com/tm.aspx?m=106426 > > > > PICDEM FS USB demo appliation under Linux/Windows using libusb > > http://www.varxec.net/picdem_fs_usb/ > > > > Just wondering if there is any benefit of using ldusb compared > > to libusb. Sorry I do not know much about ldusb. > > ldusb is just a way for devices to use a kernel ring buffer to make sure > that no data is dropped from the card. Lots of high-speed devices need > this.
PICDEM FS USB is based on Microchip 18F4550 MCU which only support Full Speed. > > Will the ldusb driver affect the existing libusb based application? > > It might mess them up if the libusb code doesn't try to unbind any > kernel driver that might be bound to the device already. I see. > Can you try running with this patch enabled to see if it handles it > properly or not? Right now I am not with my Linux computer to test the code but I think the current application will fail since they do not have any kernel driver detaching function. But I can easily patch the code to add kernel detaching function for Linux. Not a big issue. > And if libusb is the proper way to talk to this device, then we can > easily revert this change. > I believe that libusb is the right way to do so but I understand it is not a big issue. Thanks a lot for the explanation. Regards, Xiaofan ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
