pciide(4) - NetBSD Manual Pages

pciide(4)                 NetBSD Programmer's Manual                 pciide(4)


NAME

     pciide - PCI IDE controllers driver


SYNOPSIS

     pciide* at pci ? dev ? function ? flags 0x0000
     options PCIIDE_CMD064x_DISABLE


DESCRIPTION

     The pciide driver supports the PCI IDE controllers as specified in the
     "PCI IDE controller specification, revision 1.0" draft, and provides the
     core functions for the wd and atapi drivers. This driver include specif-
     ic, enhanced support for the CMD Tech PCI0640 controller, and IDE DMA/Ul-
     tra-DMA support for the following controllers:
           -   Acer labs M5229 IDE Controller
           -   CMD Tech PCI0643 and PCI0646 IDE Controllers
           -   Contaq Microsystems/Cypress CY82C693 IDE Controller
           -   Intel PIIX, PIIX3 and PIIX4 IDE Controllers
           -   Silicon Integrated System 5597/5598 IDE controller
           -   VIA Technologies VT82C586 and VT82C586A IDE Controllers
     Some of these contollers are only available in multifunction PCI chips.

     The 0x0001 flag force the pciide driver to use DMA when there is no ex-
     plicit DMA mode setting support for the controller but DMA is present. If
     the BIOS didn't set up the controller properly, this can cause a machine
     hang.



BUGS

     There's no way to reliably know if a PCI064x controller is enabled or
     not.  If the driver finds a PCI064x, it will assume it is enabled unless
     the PCIIDE_CMD064x_DISABLE is specified in the kernel config file.  This
     will be a problem only if the controller has been disabled in the BIOS
     and another controller has been installed and uses the ISA legacy I/O
     ports and interrupts.

     The timings used for the PIO and DMA modes for controllers listed above
     are for a PCI bus running at 30 or 33 Mhz. This driver may not work prop-
     erly on overclocked systems.



SEE ALSO

     intro(4), wd(4), scsi(4), wdc(4)

NetBSD 1.4                     October 15, 1998                              1