stpcide(4) - NetBSD Manual Pages

STPCIDE(4)              NetBSD 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 debugging
     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 includ-
     ing the STPC Vega Ultra-IDE controller will need adjustments.

NetBSD 9.1                     October 31, 2003                     NetBSD 9.1