regarding device driver

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09-08-2008

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regarding device driver

Hi All,
I have a device driver that uses UARTserial port to write/read to-from a device.
That device driver is working fine on FC3 machine( kernel version 2.6.12)...
Now I am switching to FC9 (kernel version 2.6.25.11-97).I have changed the interrupt flag SA_INTERRUPT to IRQF_DISABLED for FC9.
device driver is compiling & loading properly.My program is able to send the data as well as device is also responding but I m not able to get the data inside the PC.According to me ,recieve data line interrupt is not able to get CPU attention in properly time.may be I have to increase the priority of IRQ4.
so plz tell me how to increase the priority of IRQ4 in FC9 or any other solutuion...
Thnx in advance....

rajuprade

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LEARN ABOUT XFREE86

uchcom

UCHCOM(4)						   BSD Kernel Interfaces Manual 						 UCHCOM(4)

NAME

     uchcom -- WinChipHead CH341/CH340 serial adapter driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device uchcom
	   device ucom

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   uchcom_load="YES"

DESCRIPTION

     The uchcom driver provides support for the WinChipHead CH341/CH340 USB-to-RS-232 Bridge chip.

     The device is accessed through the ucom(4) driver which makes it behave like a tty(4).

HARDWARE

     The uchcom driver supports the following adapters:

     o	 HL USB-RS232

SEE ALSO

     tty(4), ucom(4), usb(4)

HISTORY

     The uchcom driver first appeared in NetBSD.  The first FreeBSD release to include it was FreeBSD 8.0.

BUGS

     Actually, this chip seems unable to drive other than 8 data bits and 1 stop bit line.

BSD
								   May 18, 2009 							       BSD

Programming