STPCIDE(4)						   BSD Kernel Interfaces Manual 						STPCIDE(4)

NAME

     stpcide -- STMicroelectronics STPC IDE disk controllers driver

SYNOPSIS

     stpcide* at pci? dev ? function ? flags 0x0000

DESCRIPTION

     The stpcide driver supports the STMicroelectronics STPC x86 SoC internal IDE controllers, and provides the interface with the hardware for
     the ata(4) driver.  The driver features DMA mode 2 and PIO mode 4 transfer speeds.

     The 0x0002 flag forces the stpcide driver to disable DMA on chipsets for which DMA would normally be enabled.  This can be used as a debug-
     ging aid, or to work around problems where the IDE controller is wired up to the system incorrectly.

SEE ALSO

     ata(4), atapi(4), intro(4), pci(4), pciide(4), wd(4), wdc(4)

BUGS

     The timings used for the DMA and PIO modes are for STPC Atlas and its siblings with their PCI clock configured at 33 MHz.	Other speeds
     including the STPC Vega Ultra-IDE controller will need adjustments.

BSD
								 October 31, 2003							       BSD