FreeBSD/Linux Kernel Cross Reference
sys/dev/ata/chipsets/ata-cypress.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
      * All rights reserved.
      *
      * 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,
     *    without modification, immediately at the beginning of the file.
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/module.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/ata.h>
    #include <sys/bus.h>
    #include <sys/endian.h>
    #include <sys/malloc.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/sema.h>
    #include <sys/taskqueue.h>
    #include <vm/uma.h>
    #include <machine/stdarg.h>
    #include <machine/resource.h>
    #include <machine/bus.h>
    #include <sys/rman.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #include <dev/ata/ata-all.h>
    #include <dev/ata/ata-pci.h>
    #include <ata_if.h>
    
    /* local prototypes */
    static int ata_cypress_chipinit(device_t dev);
    static int ata_cypress_setmode(device_t dev, int target, int mode);
    
    /*
     * Cypress chipset support functions
     */
    static int
    ata_cypress_probe(device_t dev)
    {
        struct ata_pci_controller *ctlr = device_get_softc(dev);
    
        /*
         * the Cypress chip is a mess, it contains two ATA functions, but
         * both channels are visible on the first one.
         * simply ignore the second function for now, as the right
         * solution (ignoring the second channel on the first function)
         * doesn't work with the crappy ATA interrupt setup on the alpha.
         */
        if (pci_get_devid(dev) == ATA_CYPRESS_82C693 &&
            pci_get_function(dev) == 1 &&
            pci_get_subclass(dev) == PCIS_STORAGE_IDE) {
            device_set_desc(dev, "Cypress 82C693 ATA controller");
            ctlr->chipinit = ata_cypress_chipinit;
            return (BUS_PROBE_LOW_PRIORITY);
        }
        return ENXIO;
    }
    
    static int
    ata_cypress_chipinit(device_t dev)
    {
        struct ata_pci_controller *ctlr = device_get_softc(dev);
    
        if (ata_setup_interrupt(dev, ata_generic_intr))
            return ENXIO;
    
        ctlr->setmode = ata_cypress_setmode;
        return 0;
    }
    
    static int
    ata_cypress_setmode(device_t dev, int target, int mode)
    {
            device_t parent = device_get_parent(dev);
           struct ata_channel *ch = device_get_softc(dev);
   
           mode = min(mode, ATA_WDMA2);
   
           /* XXX SOS missing WDMA0+1 + PIO modes */
           if (mode == ATA_WDMA2) { 
                   pci_write_config(parent, ch->unit ? 0x4e : 0x4c, 0x2020, 2);
           }
           /* we could set PIO mode timings, but we assume the BIOS did that */
           return (mode);
   }
   
   ATA_DECLARE_DRIVER(ata_cypress);

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