![Alan Cox](/assets/img/avatar_default.png)
This allows parallel scan and the like to be set without having to stop using the existing full helper functions. This patch merely adds the argument and fixes up the callers. It doesn't undo the special cases already in the tree or add any new parallel callers. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
539 lines
14 KiB
C
539 lines
14 KiB
C
/*
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* pata_serverworks.c - Serverworks PATA for new ATA layer
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* (C) 2005 Red Hat Inc
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* (C) 2010 Bartlomiej Zolnierkiewicz
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*
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* based upon
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*
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* serverworks.c
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*
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* Copyright (C) 1998-2000 Michel Aubry
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* Copyright (C) 1998-2000 Andrzej Krzysztofowicz
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* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
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* Portions copyright (c) 2001 Sun Microsystems
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*
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*
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* RCC/ServerWorks IDE driver for Linux
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*
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* OSB4: `Open South Bridge' IDE Interface (fn 1)
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* supports UDMA mode 2 (33 MB/s)
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*
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* CSB5: `Champion South Bridge' IDE Interface (fn 1)
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* all revisions support UDMA mode 4 (66 MB/s)
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* revision A2.0 and up support UDMA mode 5 (100 MB/s)
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*
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* *** The CSB5 does not provide ANY register ***
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* *** to detect 80-conductor cable presence. ***
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*
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* CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
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*
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* Documentation:
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* Available under NDA only. Errata info very hard to get.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_serverworks"
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#define DRV_VERSION "0.4.3"
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#define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
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#define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
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/* Seagate Barracuda ATA IV Family drives in UDMA mode 5
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* can overrun their FIFOs when used with the CSB5 */
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static const char *csb_bad_ata100[] = {
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"ST320011A",
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"ST340016A",
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"ST360021A",
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"ST380021A",
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NULL
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};
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/**
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* dell_cable - Dell serverworks cable detection
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* @ap: ATA port to do cable detect
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*
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* Dell hide the 40/80 pin select for their interfaces in the top two
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* bits of the subsystem ID.
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*/
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static int dell_cable(struct ata_port *ap) {
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
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return ATA_CBL_PATA80;
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return ATA_CBL_PATA40;
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}
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/**
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* sun_cable - Sun Cobalt 'Alpine' cable detection
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* @ap: ATA port to do cable select
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*
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* Cobalt CSB5 IDE hides the 40/80pin in the top two bits of the
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* subsystem ID the same as dell. We could use one function but we may
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* need to extend the Dell one in future
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*/
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static int sun_cable(struct ata_port *ap) {
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
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return ATA_CBL_PATA80;
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return ATA_CBL_PATA40;
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}
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/**
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* osb4_cable - OSB4 cable detect
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* @ap: ATA port to check
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*
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* The OSB4 isn't UDMA66 capable so this is easy
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*/
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static int osb4_cable(struct ata_port *ap) {
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return ATA_CBL_PATA40;
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}
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/**
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* csb_cable - CSB5/6 cable detect
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* @ap: ATA port to check
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*
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* Serverworks default arrangement is to use the drive side detection
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* only.
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*/
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static int csb_cable(struct ata_port *ap) {
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return ATA_CBL_PATA_UNK;
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}
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struct sv_cable_table {
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int device;
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int subvendor;
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int (*cable_detect)(struct ata_port *ap);
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};
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/*
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* Note that we don't copy the old serverworks code because the old
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* code contains obvious mistakes
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*/
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static struct sv_cable_table cable_detect[] = {
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{ PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, dell_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, dell_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, sun_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, osb4_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, csb_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, csb_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, csb_cable },
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{ PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, csb_cable },
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{ }
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};
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/**
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* serverworks_cable_detect - cable detection
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* @ap: ATA port
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*
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* Perform cable detection according to the device and subvendor
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* identifications
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*/
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static int serverworks_cable_detect(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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struct sv_cable_table *cb = cable_detect;
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while(cb->device) {
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if (cb->device == pdev->device &&
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(cb->subvendor == pdev->subsystem_vendor ||
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cb->subvendor == PCI_ANY_ID)) {
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return cb->cable_detect(ap);
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}
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cb++;
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}
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BUG();
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return -1; /* kill compiler warning */
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}
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/**
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* serverworks_is_csb - Check for CSB or OSB
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* @pdev: PCI device to check
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*
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* Returns true if the device being checked is known to be a CSB
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* series device.
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*/
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static u8 serverworks_is_csb(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
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case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
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case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
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case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
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return 1;
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default:
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break;
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}
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return 0;
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}
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/**
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* serverworks_osb4_filter - mode selection filter
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* @adev: ATA device
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* @mask: Mask of proposed modes
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*
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* Filter the offered modes for the device to apply controller
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* specific rules. OSB4 requires no UDMA for disks due to a FIFO
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* bug we hit.
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*/
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static unsigned long serverworks_osb4_filter(struct ata_device *adev, unsigned long mask)
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{
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if (adev->class == ATA_DEV_ATA)
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mask &= ~ATA_MASK_UDMA;
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return ata_bmdma_mode_filter(adev, mask);
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}
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/**
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* serverworks_csb_filter - mode selection filter
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* @adev: ATA device
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* @mask: Mask of proposed modes
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*
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* Check the blacklist and disable UDMA5 if matched
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*/
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static unsigned long serverworks_csb_filter(struct ata_device *adev, unsigned long mask)
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{
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const char *p;
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char model_num[ATA_ID_PROD_LEN + 1];
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int i;
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/* Disk, UDMA */
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if (adev->class != ATA_DEV_ATA)
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return ata_bmdma_mode_filter(adev, mask);
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/* Actually do need to check */
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ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
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for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {
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if (!strcmp(p, model_num))
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mask &= ~(0xE0 << ATA_SHIFT_UDMA);
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}
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return ata_bmdma_mode_filter(adev, mask);
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}
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/**
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* serverworks_set_piomode - set initial PIO mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Program the OSB4/CSB5 timing registers for PIO. The PIO register
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* load is done as a simple lookup.
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*/
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static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
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int offset = 1 + 2 * ap->port_no - adev->devno;
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int devbits = (2 * ap->port_no + adev->devno) * 4;
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u16 csb5_pio;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int pio = adev->pio_mode - XFER_PIO_0;
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pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]);
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/* The OSB4 just requires the timing but the CSB series want the
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mode number as well */
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if (serverworks_is_csb(pdev)) {
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pci_read_config_word(pdev, 0x4A, &csb5_pio);
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csb5_pio &= ~(0x0F << devbits);
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pci_write_config_word(pdev, 0x4A, csb5_pio | (pio << devbits));
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}
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}
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/**
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* serverworks_set_dmamode - set initial DMA mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
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* chipset. The MWDMA mode values are pulled from a lookup table
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* while the chipset uses mode number for UDMA.
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*/
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static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
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int offset = 1 + 2 * ap->port_no - adev->devno;
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int devbits = 2 * ap->port_no + adev->devno;
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u8 ultra;
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u8 ultra_cfg;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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pci_read_config_byte(pdev, 0x54, &ultra_cfg);
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pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
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ultra &= ~(0x0F << (adev->devno * 4));
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if (adev->dma_mode >= XFER_UDMA_0) {
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pci_write_config_byte(pdev, 0x44 + offset, 0x20);
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ultra |= (adev->dma_mode - XFER_UDMA_0)
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<< (adev->devno * 4);
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ultra_cfg |= (1 << devbits);
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} else {
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pci_write_config_byte(pdev, 0x44 + offset,
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dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
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ultra_cfg &= ~(1 << devbits);
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}
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pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
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pci_write_config_byte(pdev, 0x54, ultra_cfg);
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}
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static struct scsi_host_template serverworks_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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};
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static struct ata_port_operations serverworks_osb4_port_ops = {
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.inherits = &ata_bmdma_port_ops,
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.cable_detect = serverworks_cable_detect,
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.mode_filter = serverworks_osb4_filter,
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.set_piomode = serverworks_set_piomode,
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.set_dmamode = serverworks_set_dmamode,
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};
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static struct ata_port_operations serverworks_csb_port_ops = {
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.inherits = &serverworks_osb4_port_ops,
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.mode_filter = serverworks_csb_filter,
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};
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static int serverworks_fixup_osb4(struct pci_dev *pdev)
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{
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u32 reg;
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struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
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if (isa_dev) {
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pci_read_config_dword(isa_dev, 0x64, ®);
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reg &= ~0x00002000; /* disable 600ns interrupt mask */
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if (!(reg & 0x00004000))
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printk(KERN_DEBUG DRV_NAME ": UDMA not BIOS enabled.\n");
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reg |= 0x00004000; /* enable UDMA/33 support */
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pci_write_config_dword(isa_dev, 0x64, reg);
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pci_dev_put(isa_dev);
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return 0;
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}
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printk(KERN_WARNING DRV_NAME ": Unable to find bridge.\n");
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return -ENODEV;
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}
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static int serverworks_fixup_csb(struct pci_dev *pdev)
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{
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u8 btr;
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/* Third Channel Test */
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if (!(PCI_FUNC(pdev->devfn) & 1)) {
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struct pci_dev * findev = NULL;
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u32 reg4c = 0;
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findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
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if (findev) {
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pci_read_config_dword(findev, 0x4C, ®4c);
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reg4c &= ~0x000007FF;
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reg4c |= 0x00000040;
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reg4c |= 0x00000020;
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pci_write_config_dword(findev, 0x4C, reg4c);
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pci_dev_put(findev);
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}
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} else {
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struct pci_dev * findev = NULL;
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u8 reg41 = 0;
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findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
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if (findev) {
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pci_read_config_byte(findev, 0x41, ®41);
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reg41 &= ~0x40;
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pci_write_config_byte(findev, 0x41, reg41);
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pci_dev_put(findev);
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}
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}
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/* setup the UDMA Control register
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*
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* 1. clear bit 6 to enable DMA
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* 2. enable DMA modes with bits 0-1
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* 00 : legacy
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* 01 : udma2
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* 10 : udma2/udma4
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* 11 : udma2/udma4/udma5
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*/
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pci_read_config_byte(pdev, 0x5A, &btr);
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btr &= ~0x40;
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if (!(PCI_FUNC(pdev->devfn) & 1))
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btr |= 0x2;
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else
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btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
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pci_write_config_byte(pdev, 0x5A, btr);
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return btr;
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}
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static void serverworks_fixup_ht1000(struct pci_dev *pdev)
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{
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u8 btr;
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/* Setup HT1000 SouthBridge Controller - Single Channel Only */
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pci_read_config_byte(pdev, 0x5A, &btr);
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btr &= ~0x40;
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btr |= 0x3;
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pci_write_config_byte(pdev, 0x5A, btr);
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}
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static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static const struct ata_port_info info[4] = {
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{ /* OSB4 */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA2,
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.port_ops = &serverworks_osb4_port_ops
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}, { /* OSB4 no UDMA */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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/* No UDMA */
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.port_ops = &serverworks_osb4_port_ops
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}, { /* CSB5 */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA4,
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.port_ops = &serverworks_csb_port_ops
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}, { /* CSB5 - later revisions*/
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA5,
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.port_ops = &serverworks_csb_port_ops
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}
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};
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const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
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int rc;
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rc = pcim_enable_device(pdev);
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if (rc)
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return rc;
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/* Force master latency timer to 64 PCI clocks */
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
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/* OSB4 : South Bridge and IDE */
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if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
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/* Select non UDMA capable OSB4 if we can't do fixups */
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if ( serverworks_fixup_osb4(pdev) < 0)
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ppi[0] = &info[1];
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}
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/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
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else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
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(pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
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(pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
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/* If the returned btr is the newer revision then
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select the right info block */
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if (serverworks_fixup_csb(pdev) == 3)
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ppi[0] = &info[3];
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/* Is this the 3rd channel CSB6 IDE ? */
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if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
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ppi[1] = &ata_dummy_port_info;
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}
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/* setup HT1000E */
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else if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
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serverworks_fixup_ht1000(pdev);
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if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
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ata_pci_bmdma_clear_simplex(pdev);
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return ata_pci_sff_init_one(pdev, ppi, &serverworks_sht, NULL, 0);
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}
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|
|
|
#ifdef CONFIG_PM
|
|
static int serverworks_reinit_one(struct pci_dev *pdev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
int rc;
|
|
|
|
rc = ata_pci_device_do_resume(pdev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Force master latency timer to 64 PCI clocks */
|
|
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
|
|
|
|
switch (pdev->device) {
|
|
case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE:
|
|
serverworks_fixup_osb4(pdev);
|
|
break;
|
|
case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
|
|
ata_pci_bmdma_clear_simplex(pdev);
|
|
/* fall through */
|
|
case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
|
|
case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
|
|
serverworks_fixup_csb(pdev);
|
|
break;
|
|
case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
|
|
serverworks_fixup_ht1000(pdev);
|
|
break;
|
|
}
|
|
|
|
ata_host_resume(host);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct pci_device_id serverworks[] = {
|
|
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
|
|
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2},
|
|
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
|
|
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2},
|
|
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2},
|
|
|
|
{ },
|
|
};
|
|
|
|
static struct pci_driver serverworks_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = serverworks,
|
|
.probe = serverworks_init_one,
|
|
.remove = ata_pci_remove_one,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ata_pci_device_suspend,
|
|
.resume = serverworks_reinit_one,
|
|
#endif
|
|
};
|
|
|
|
static int __init serverworks_init(void)
|
|
{
|
|
return pci_register_driver(&serverworks_pci_driver);
|
|
}
|
|
|
|
static void __exit serverworks_exit(void)
|
|
{
|
|
pci_unregister_driver(&serverworks_pci_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, serverworks);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(serverworks_init);
|
|
module_exit(serverworks_exit);
|