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

     /*-
      * 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: releng/8.4/sys/dev/ata/ata-sata.c 245800 2013-01-22 17:18:34Z mav $");
    
    #include "opt_ata.h"
    #include <sys/param.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/ata/ata-all.h>
    #include <ata_if.h>
    
    void
    ata_sata_phy_check_events(device_t dev, int port)
    {
        struct ata_channel *ch = device_get_softc(dev);
        u_int32_t error, status;
    
        if (ata_sata_scr_read(ch, port, ATA_SERROR, &error))
            return;
    
        /* Check that SError value is sane. */
        if (error == 0xffffffff)
            return;
    
        /* Clear set error bits/interrupt. */
        if (error)
            ata_sata_scr_write(ch, port, ATA_SERROR, error);
    
        /* if we have a connection event deal with it */
        if ((error & ATA_SE_PHY_CHANGED) && (ch->pm_level == 0)) {
            if (bootverbose) {
                if (ata_sata_scr_read(ch, port, ATA_SSTATUS, &status)) {
                        device_printf(dev, "PHYRDY change\n");
                } else if (((status & ATA_SS_DET_MASK) == ATA_SS_DET_PHY_ONLINE) &&
                    ((status & ATA_SS_SPD_MASK) != ATA_SS_SPD_NO_SPEED) &&
                    ((status & ATA_SS_IPM_MASK) == ATA_SS_IPM_ACTIVE)) {
                        device_printf(dev, "CONNECT requested\n");
                } else
                        device_printf(dev, "DISCONNECT requested\n");
            }
            taskqueue_enqueue(taskqueue_thread, &ch->conntask);
        }
    }
    
    int
    ata_sata_scr_read(struct ata_channel *ch, int port, int reg, uint32_t *val)
    {
    
        if (ch->hw.pm_read != NULL)
            return (ch->hw.pm_read(ch->dev, port, reg, val));
        if (ch->r_io[reg].res) {
            *val = ATA_IDX_INL(ch, reg);
            return (0);
        }
        return (-1);
    }
    
    int
    ata_sata_scr_write(struct ata_channel *ch, int port, int reg, uint32_t val)
    {
    
       if (ch->hw.pm_write != NULL)
           return (ch->hw.pm_write(ch->dev, port, reg, val));
       if (ch->r_io[reg].res) {
           ATA_IDX_OUTL(ch, reg, val);
           return (0);
       }
       return (-1);
   }
   
   static int
   ata_sata_connect(struct ata_channel *ch, int port, int quick)
   {
       u_int32_t status;
       int timeout, t;
   
       /* wait up to 1 second for "connect well" */
       timeout = (quick == 2) ? 0 : 100;
       t = 0;
       while (1) {
           if (ata_sata_scr_read(ch, port, ATA_SSTATUS, &status))
               return (0);
           if (((status & ATA_SS_DET_MASK) == ATA_SS_DET_PHY_ONLINE) &&
               ((status & ATA_SS_SPD_MASK) != ATA_SS_SPD_NO_SPEED) &&
               ((status & ATA_SS_IPM_MASK) == ATA_SS_IPM_ACTIVE))
               break;
           if (++t > timeout)
               break;
           ata_udelay(10000);
       }
       if (bootverbose) {
           if (t > timeout) {
               if (port < 0) {
                   device_printf(ch->dev, "SATA connect timeout status=%08x\n",
                       status);
               } else {
                   device_printf(ch->dev, "p%d: SATA connect timeout status=%08x\n",
                       port, status);
               }
           } else if (port < 0) {
               device_printf(ch->dev, "SATA connect time=%dms status=%08x\n",
                   t * 10, status);
           } else {
               device_printf(ch->dev, "p%d: SATA connect time=%dms status=%08x\n",
                   port, t * 10, status);
           }
       }
   
       /* clear SATA error register */
       ata_sata_scr_write(ch, port, ATA_SERROR, 0xffffffff);
   
       return ((t > timeout) ? 0 : 1);
   }
   
   int
   ata_sata_phy_reset(device_t dev, int port, int quick)
   {
       struct ata_channel *ch = device_get_softc(dev);
       int loop, retry, sata_rev;
       uint32_t val, val1;
   
   #ifdef ATA_CAM
       sata_rev = ch->user[port < 0 ? 0 : port].revision;
       if (sata_rev > 0)
           quick = 0;
   #else
       sata_rev = 0;
   #endif
   
       if (quick) {
           if (ata_sata_scr_read(ch, port, ATA_SCONTROL, &val))
               return (0);
           if ((val & ATA_SC_DET_MASK) == ATA_SC_DET_IDLE) {
               ata_sata_scr_write(ch, port, ATA_SCONTROL,
                   ATA_SC_DET_IDLE | ((ch->pm_level > 0) ? 0 :
                   ATA_SC_IPM_DIS_PARTIAL | ATA_SC_IPM_DIS_SLUMBER));
               return ata_sata_connect(ch, port, quick);
           }
       }
   
       if (bootverbose) {
           if (port < 0) {
               device_printf(dev, "hard reset ...\n");
           } else {
               device_printf(dev, "p%d: hard reset ...\n", port);
           }
       }
       if (sata_rev == 1)
           val1 = ATA_SC_SPD_SPEED_GEN1;
       else if (sata_rev == 2)
           val1 = ATA_SC_SPD_SPEED_GEN2;
       else if (sata_rev == 3)
           val1 = ATA_SC_SPD_SPEED_GEN3;
       else
           val1 = 0;
       for (retry = 0; retry < 10; retry++) {
           for (loop = 0; loop < 10; loop++) {
               if (ata_sata_scr_write(ch, port, ATA_SCONTROL, ATA_SC_DET_RESET |
                       val1 | ATA_SC_IPM_DIS_PARTIAL | ATA_SC_IPM_DIS_SLUMBER))
                   goto fail;
               ata_udelay(100);
               if (ata_sata_scr_read(ch, port, ATA_SCONTROL, &val))
                   goto fail;
               if ((val & ATA_SC_DET_MASK) == ATA_SC_DET_RESET)
                   break;
           }
           ata_udelay(5000);
           for (loop = 0; loop < 10; loop++) {
               if (ata_sata_scr_write(ch, port, ATA_SCONTROL,
                       ATA_SC_DET_IDLE | val1 | ((ch->pm_level > 0) ? 0 :
                       ATA_SC_IPM_DIS_PARTIAL | ATA_SC_IPM_DIS_SLUMBER)))
                   goto fail;
               ata_udelay(100);
               if (ata_sata_scr_read(ch, port, ATA_SCONTROL, &val))
                   goto fail;
               if ((val & ATA_SC_DET_MASK) == 0)
                   return ata_sata_connect(ch, port, 0);
           }
       }
   fail:
       /* Clear SATA error register. */
       ata_sata_scr_write(ch, port, ATA_SERROR, 0xffffffff);
   
       if (bootverbose) {
           if (port < 0) {
               device_printf(dev, "hard reset failed\n");
           } else {
               device_printf(dev, "p%d: hard reset failed\n", port);
           }
       }
       return (0);
   }
   
   int
   ata_sata_setmode(device_t dev, int target, int mode)
   {
   
           return (min(mode, ATA_UDMA5));
   }
   
   int
   ata_sata_getrev(device_t dev, int target)
   {
           struct ata_channel *ch = device_get_softc(dev);
   
           if (ch->r_io[ATA_SSTATUS].res)
                   return ((ATA_IDX_INL(ch, ATA_SSTATUS) & 0x0f0) >> 4);
           return (0xff);
   }
   
   int
   ata_request2fis_h2d(struct ata_request *request, u_int8_t *fis)
   {
   
       if (request->flags & ATA_R_ATAPI) {
           fis[0] = 0x27;                  /* host to device */
           fis[1] = 0x80 | (request->unit & 0x0f);
           fis[2] = ATA_PACKET_CMD;
           if (request->flags & (ATA_R_READ | ATA_R_WRITE))
               fis[3] = ATA_F_DMA;
           else {
               fis[5] = request->transfersize;
               fis[6] = request->transfersize >> 8;
           }
           fis[7] = ATA_D_LBA;
           fis[15] = ATA_A_4BIT;
           return 20;
       }
       else {
           fis[0] = 0x27;                  /* host to device */
           fis[1] = 0x80 | (request->unit & 0x0f);
           fis[2] = request->u.ata.command;
           fis[3] = request->u.ata.feature;
           fis[4] = request->u.ata.lba;
           fis[5] = request->u.ata.lba >> 8;
           fis[6] = request->u.ata.lba >> 16;
           fis[7] = ATA_D_LBA;
           if (!(request->flags & ATA_R_48BIT))
               fis[7] |= (ATA_D_IBM | (request->u.ata.lba >> 24 & 0x0f));
           fis[8] = request->u.ata.lba >> 24;
           fis[9] = request->u.ata.lba >> 32; 
           fis[10] = request->u.ata.lba >> 40; 
           fis[11] = request->u.ata.feature >> 8;
           fis[12] = request->u.ata.count;
           fis[13] = request->u.ata.count >> 8;
           fis[15] = ATA_A_4BIT;
           return 20;
       }
       return 0;
   }
   
   void
   ata_pm_identify(device_t dev)
   {
       struct ata_channel *ch = device_get_softc(dev);
       u_int32_t pm_chipid, pm_revision, pm_ports;
       int port;
   
       /* get PM vendor & product data */
       if (ch->hw.pm_read(dev, ATA_PM, 0, &pm_chipid)) {
           device_printf(dev, "error getting PM vendor data\n");
           return;
       }
   
       /* get PM revision data */
       if (ch->hw.pm_read(dev, ATA_PM, 1, &pm_revision)) {
           device_printf(dev, "error getting PM revison data\n");
           return;
       }
   
       /* get number of HW ports on the PM */
       if (ch->hw.pm_read(dev, ATA_PM, 2, &pm_ports)) {
           device_printf(dev, "error getting PM port info\n");
           return;
       }
       pm_ports &= 0x0000000f;
   
       /* chip specific quirks */
       switch (pm_chipid) {
       case 0x37261095:
           /* This PM declares 6 ports, while only 5 of them are real.
            * Port 5 is enclosure management bridge port, which has implementation
            * problems, causing probe faults. Hide it for now. */
           device_printf(dev, "SiI 3726 (rev=%x) Port Multiplier with %d (5) ports\n",
                         pm_revision, pm_ports);
           pm_ports = 5;
           break;
   
       case 0x47261095:
           /* This PM declares 7 ports, while only 5 of them are real.
            * Port 5 is some fake "Config  Disk" with 640 sectors size,
            * port 6 is enclosure management bridge port.
            * Both fake ports has implementation problems, causing
            * probe faults. Hide them for now. */
           device_printf(dev, "SiI 4726 (rev=%x) Port Multiplier with %d (5) ports\n",
                         pm_revision, pm_ports);
           pm_ports = 5;
           break;
   
       default:
           device_printf(dev, "Port Multiplier (id=%08x rev=%x) with %d ports\n",
                         pm_chipid, pm_revision, pm_ports);
       }
   
       /* reset all ports and register if anything connected */
       for (port=0; port < pm_ports; port++) {
           u_int32_t signature;
   
           if (!ata_sata_phy_reset(dev, port, 1))
               continue;
   
           /*
            * XXX: I have no idea how to properly wait for PMP port hardreset
            * completion. Without this delay soft reset does not completes
            * successfully.
            */
           DELAY(1000000);
   
           signature = ch->hw.softreset(dev, port);
   
           if (bootverbose)
               device_printf(dev, "p%d: SIGNATURE=%08x\n", port, signature);
   
           /* figure out whats there */
           switch (signature >> 16) {
           case 0x0000:
               ch->devices |= (ATA_ATA_MASTER << port);
               continue;
           case 0xeb14:
               ch->devices |= (ATA_ATAPI_MASTER << port);
               continue;
           }
       }
   }

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