.\" $OpenBSD: pciide.4,v 1.45 2005/01/15 15:23:40 jsg Exp $ .\" $NetBSD: pciide.4,v 1.8 1999/03/16 01:19:17 garbled Exp $ .\" .\" Copyright (c) 1998 Manuel Bouyer. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .Dd October 15, 1998 .Dt PCIIDE 4 .Os .Sh NAME .Nm pciide .Nd PCI IDE controller driver .Sh SYNOPSIS .Cd "pciide* at pci? flags 0x0000" .Pp .Cd "option PCIIDE_AMD756_ENABLEDMA" .Cd "option PCIIDE_CMD064x_DISABLE" .Cd "option PCIIDE_CMD0646U_ENABLEUDMA" .Pp .Cd "atapiscsi* at pciide? flags 0x0000" .Cd "wd* at pciide? flags 0x0000" .Sh DESCRIPTION The .Nm driver supports the PCI IDE controllers as specified in the "PCI IDE controller specification, revision 1.0" draft, as well as the Serial ATA controllers working either in parallel ATA compatibility mode or in native serial mode. It provides the core functions for the .Xr wd 4 and .Xr atapiscsi 4 drivers. This driver includes specific, enhanced support for the CMD Tech PCI0640 controller and IDE DMA/UltraDMA support for the following PCI IDE controllers: .Pp .Bl -bullet -compact -offset indent .It Acard ATP850U, ATP860, ATP860-A, ATP865-A, ATP865-R .It Acer Labs M5229 .It Adaptec AAR-1210SA .It Advanced Micro Devices AMD-756, AMD-766, AMD-768, AMD-8111 .It CMD Tech PCI0640, PCI0643, PCI0646, PCI0648, PCI0649, PCI0680 .It Contaq Microsystems/Cypress CY82C693 .It HighPoint HPT366, HPT370, HPT372, HPT302, HPT371, HPT374 .It Intel PIIX, PIIX3, and PIIX4 .It Intel 82801 (ICH/ICH0/ICH2/ICH3/ICH4/ICH4-M/ICH5/ICH5R/ICH6/ICH6R) .It Intel 6300ESB .It ITE IT8212F .It National Semiconductor PC87415 .It National Semiconductor SCx200 (found on SC1100 SoC) .It NVIDIA nForce/nForce2/nForce2-400/nForce3/nForce3-250 (SATA controllers are not supported) .It Promise PDC20246, PDC20262, PDC20265, PDC20267, PDC20268, PDC20268R, PDC20269, PDC20271, PDC20275, PDC20276, PDC20277, PDC20376 .It ServerWorks OSB4, CSB5, CSB6 (including support for the third channel) .It Silicon Image SiI3112, SiI3512, SiI3114 .It Silicon Integrated System 5513 (5597/5598), 540, 550, 620, 630, 630S, 633, 635, 640, 645, 645DX, 648, 650, 651, 652, 655, 658, 730, 733, 735, 740, 745, 746, 748, 750, 751, 752, 755, 962, 963 .It VIA Technologies VT82C586/A/B, VT82C596A/B, VT82C686A/B, VT8231, VT8366, VT8233, VT8235, VT8237 .El .Pp Some of these controllers are only available in multifunction PCI chips. .Pp The .Li 0x0001 flag forces the .Nm driver to use DMA when there is no explicit DMA mode setting support for the controller but DMA is present. If the BIOS didn't configure the controller properly, this can cause a machine hang. .Sh SEE ALSO .Xr atapiscsi 4 , .Xr intro 4 , .Xr pci 4 , .Xr scsi 4 , .Xr wd 4 , .Xr wdc 4 .Sh BUGS There's no way to know reliably if a CMD064x controller is enabled or not. If the driver finds a PCI064x, it will assume it is enabled unless .Dv 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 which uses the ISA legacy I/O ports and interrupts. .Pp The CMD0646U is reportedly unable to operate properly in UltraDMA mode. UltraDMA will not be enabled on this controller unless .Dv PCIIDE_CMD0646U_ENABLEUDMA is specified in the kernel config file. .Pp For proper operation of UltraDMA 3 and higher modes a 40-pin, 80-conductor cable must be used. On some controllers, the .Nm driver can probe the chip and see if it detects that an 80-conductor or 40-conductor cable was used. If not, it will down-grade to UltraDMA 2 mode. On other controllers, no such capability exists, and the driver assumes you are using an 80-conductor cable. If you are getting errors about corrupted data, check to make sure you are using the correct cable. An 80-conductor cable is recommended for any IDE installation, not just ones using faster UltraDMA modes, because it will decrease electrical noise and increase data reliability. .Pp The AMD756 chip revision D2 has a bug affecting DMA (but not Ultra-DMA) modes. The workaround documented by AMD is to not use DMA on any drive which does not support Ultra-DMA modes. This does not appear to be necessary on all drives, the PCIIDE_AMD756_ENABLEDMA option can be used to force multiword DMA on the buggy revisions. Multiword DMA can eventually be disabled on a per-drive basis with config flags, see .Xr wd 4 . The bug, if triggered, will cause a total system hang. .Pp The timings used for the PIO and DMA modes for controllers listed above are for a PCI bus running at 30 or 33 MHz. These timings will work on a slower bus, but they may cause errors on an over-clocked bus.