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STPCIDE(4) FreeBSD 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 including the STPC Vega Ultra-IDE controller will need adjustments. FreeBSD 14.1-RELEASE-p8 October 31, 2003 FreeBSD 14.1-RELEASE-p8