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piix_set_piomode(9) [centos man page]

PIIX_SET_PIOMODE(9)						ata_piix Internals					       PIIX_SET_PIOMODE(9)

NAME
piix_set_piomode - Initialize host controller PATA PIO timings SYNOPSIS
void piix_set_piomode(struct ata_port * ap, struct ata_device * adev); ARGUMENTS
ap Port whose timings we are configuring adev Drive in question DESCRIPTION
Set PIO mode for device, in host controller PCI config space. LOCKING
None (inherited from caller). AUTHOR
Jeff Garzik Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 PIIX_SET_PIOMODE(9)

Check Out this Related Man Page

NJATA(4)						   BSD Kernel Interfaces Manual 						  NJATA(4)

NAME
njata -- Workbit NinjaATA-32 CardBus IDE controller driver SYNOPSIS
njata* at cardbus? function ? njata* at cardbus? function ? flags 0x01 # with wait 0x01 DESCRIPTION
The njata driver provides support for the following Workbit Bus-Master CardBus IDE controller chips: NinjaATA-32Bi CardBus / PCMCIA dual mode IDE controller (``DuoATA''). This controller is mainly used for portable drives. This driver supports the CardBus mode. NPATA-32 CardBus IDE controller. This controller is widely used for CardBus CompactFlash adapters. These controllers are capable of bus-mastering for ATA PIO transfer. The njata driver uses the bus-mastering PIO transfer unless transfer buffer is unaligned, and significantly reduces CPU usage for PIO-only ATA devices compared with usual PIO transfer. CONFIGURATION
The optional flags parameter is the ``wait'' value for ATA transfers. Some combinations of host and device may fail without flags parameter or flags 0x00. In this case try adding wait values like flags 0x01 or flags 0x11 (the wait parameter is composed of two 4bit values). Smaller wait values should be faster. Too long waits may cause transfer errors. SEE ALSO
ata(4), atapi(4), cardbus(4), intro(4), wd(4), wdc(4) HISTORY
The njata device driver first appeared in NetBSD 4.0. AUTHORS
ITOH Yasufumi BSD
September 7, 2006 BSD
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