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 including the STPC
Vega Ultra-IDE controller will need adjustments.