linux-imx

/*

 * pata_serverworks.c   - Serverworks PATA for new ATA layer

 *            (C) 2005 Red Hat Inc

 *            (C) 2010 Bartlomiej Zolnierkiewicz

 *

 * based upon

 *

 * serverworks.c

 *

 * Copyright (C) 1998-2000 Michel Aubry

 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz

 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>

 * Portions copyright (c) 2001 Sun Microsystems

 *

 *

 * RCC/ServerWorks IDE driver for Linux

 *

 *   OSB4: `Open South Bridge' IDE Interface (fn 1)

 *         supports UDMA mode 2 (33 MB/s)

 *

 *   CSB5: `Champion South Bridge' IDE Interface (fn 1)

 *         all revisions support UDMA mode 4 (66 MB/s)

 *         revision A2.0 and up support UDMA mode 5 (100 MB/s)

 *

 *         *** The CSB5 does not provide ANY register ***

 *         *** to detect 80-conductor cable presence. ***

 *

 *   CSB6: `Champion South Bridge' IDE Interface (optional: third channel)

 *

 * Documentation:

 *  Available under NDA only. Errata info very hard to get.

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/blkdev.h>

#include <linux/delay.h>

#include <scsi/scsi_host.h>

#include <linux/libata.h>

​

#define DRV_NAME "pata_serverworks"

#define DRV_VERSION "0.4.3"

​

#define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */

#define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */

​

/* Seagate Barracuda ATA IV Family drives in UDMA mode 5

 * can overrun their FIFOs when used with the CSB5 */

​

static const char *csb_bad_ata100[] = {

    "ST320011A",

    "ST340016A",

    "ST360021A",

    "ST380021A",

    NULL

};

​

/**

 *  oem_cable   -   Dell/Sun serverworks cable detection

 *  @ap: ATA port to do cable detect

 *

 *  Dell PowerEdge and Sun Cobalt 'Alpine' hide the 40/80 pin select

 *  for their interfaces in the top two bits of the subsystem ID.

 */

​

static int oem_cable(struct ata_port *ap)

{

    struct pci_dev *pdev = to_pci_dev(ap->host->dev);

​

    if (pdev->subsystem_device & (1 << (ap->port_no + 14)))

        return ATA_CBL_PATA80;

    return ATA_CBL_PATA40;

}

​

struct sv_cable_table {

    int device;

    int subvendor;

    int (*cable_detect)(struct ata_port *ap);

};

​

static struct sv_cable_table cable_detect[] = {

    { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE,   PCI_VENDOR_ID_DELL, oem_cable },

    { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE,   PCI_VENDOR_ID_DELL, oem_cable },

    { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE,   PCI_VENDOR_ID_SUN,  oem_cable },

    { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE,   PCI_ANY_ID, ata_cable_40wire  },

    { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE,   PCI_ANY_ID, ata_cable_unknown },

    { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE,   PCI_ANY_ID, ata_cable_unknown },

    { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2,  PCI_ANY_ID, ata_cable_unknown },

    { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, ata_cable_unknown },

    { }

};