FreeBSD/Linux Kernel Cross Reference
sys/dev/ata/chipsets/ata-amd.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_amd_ch_attach(device_t dev);
    static int ata_amd_chipinit(device_t dev);
    static int ata_amd_setmode(device_t dev, int target, int mode);
    
    /* misc defines */
    #define AMD_BUG         0x01
    #define AMD_CABLE       0x02
    
    /*
     * Advanced Micro Devices (AMD) chipset support functions
     */
    static int
    ata_amd_probe(device_t dev)
    {
        struct ata_pci_controller *ctlr = device_get_softc(dev);
        static const struct ata_chip_id ids[] =
        {{ ATA_AMD756,  0x00, 0x00,              0, ATA_UDMA4, "756" },
         { ATA_AMD766,  0x00, AMD_CABLE|AMD_BUG, 0, ATA_UDMA5, "766" },
         { ATA_AMD768,  0x00, AMD_CABLE,         0, ATA_UDMA5, "768" },
         { ATA_AMD8111, 0x00, AMD_CABLE,         0, ATA_UDMA6, "8111" },
         { ATA_AMD5536, 0x00, 0x00,              0, ATA_UDMA5, "CS5536" },
         { 0, 0, 0, 0, 0, 0}};
    
        if (pci_get_vendor(dev) != ATA_AMD_ID)
            return ENXIO;
    
        if (!(ctlr->chip = ata_match_chip(dev, ids)))
            return ENXIO;
    
        ata_set_desc(dev);
        ctlr->chipinit = ata_amd_chipinit;
        return (BUS_PROBE_LOW_PRIORITY);
    }
    
    static int
    ata_amd_chipinit(device_t dev)
    {
        struct ata_pci_controller *ctlr = device_get_softc(dev);
    
        if (ata_setup_interrupt(dev, ata_generic_intr))
            return ENXIO;
    
        /* disable/set prefetch, postwrite */
        if (ctlr->chip->cfg1 & AMD_BUG)
           pci_write_config(dev, 0x41, pci_read_config(dev, 0x41, 1) & 0x0f, 1);
       else
           pci_write_config(dev, 0x41, pci_read_config(dev, 0x41, 1) | 0xf0, 1);
   
       ctlr->ch_attach = ata_amd_ch_attach;
       ctlr->setmode = ata_amd_setmode;
       return 0;
   }
   
   static int
   ata_amd_setmode(device_t dev, int target, int mode)
   {
           device_t parent = device_get_parent(dev);
           struct ata_pci_controller *ctlr = device_get_softc(parent);
           struct ata_channel *ch = device_get_softc(dev);
           int devno = (ch->unit << 1) + target;
           int piomode;
           static const uint8_t timings[] =
               { 0xa8, 0x65, 0x42, 0x22, 0x20, 0xa8, 0x22, 0x20 };
           static const uint8_t modes[] =
               { 0xc2, 0xc1, 0xc0, 0xc4, 0xc5, 0xc6, 0xc7 };
           int reg = 0x53 - devno;
   
           mode = min(mode, ctlr->chip->max_dma);
           if (ctlr->chip->cfg1 & AMD_CABLE) {
                   if (ata_dma_check_80pin && mode > ATA_UDMA2 &&
                       !(pci_read_config(parent, 0x42, 1) & (1 << devno))) {
                           ata_print_cable(dev, "controller");
                           mode = ATA_UDMA2;
                   }
           }
           /* Set UDMA timings. */
           if (mode >= ATA_UDMA0) {
               pci_write_config(parent, reg, modes[mode & ATA_MODE_MASK], 1);
               piomode = ATA_PIO4;
           } else {
               pci_write_config(parent, reg, 0x8b, 1);
               piomode = mode;
           }
           /* Set WDMA/PIO timings. */
           pci_write_config(parent, reg - 0x08, timings[ata_mode2idx(piomode)], 1);
           return (mode);
   }
   
   static int
   ata_amd_ch_attach(device_t dev)
   {
           struct ata_pci_controller *ctlr;
           struct ata_channel *ch;
           int error;
   
           ctlr = device_get_softc(device_get_parent(dev));
           ch = device_get_softc(dev);
           error = ata_pci_ch_attach(dev);
           if (ctlr->chip->cfg1 & AMD_CABLE)
                   ch->flags |= ATA_CHECKS_CABLE;
           return (error);
   }
   
   ATA_DECLARE_DRIVER(ata_amd);

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