537 lines
14 KiB
C
537 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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*
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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_byte(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 "ata_serverworks: 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 = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = 0x07,
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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 = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = 0x00,
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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 = 0x1f,
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.mwdma_mask = 0x07,
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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 = 0x1f,
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.mwdma_mask = 0x07,
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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);
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}
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#ifdef CONFIG_PM
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static int serverworks_reinit_one(struct pci_dev *pdev)
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{
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struct ata_host *host = dev_get_drvdata(&pdev->dev);
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int rc;
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rc = ata_pci_device_do_resume(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 */
|
|
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);
|