FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/if_en_pci.c

     /*      $NetBSD: if_en_pci.c,v 1.20 2003/10/30 01:58:17 simonb Exp $    */
     
     /*
      *
      * Copyright (c) 1996 Charles D. Cranor and Washington University.
      * 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.
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Charles D. Cranor and
     *      Washington University.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * 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.
     */
    
    /*
     *
     * i f _ e n _ p c i . c  
     *
     * author: Chuck Cranor <chuck@ccrc.wustl.edu>
     * started: spring, 1996.
     *
     * PCI glue for the eni155p card.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: if_en_pci.c,v 1.20 2003/10/30 01:58:17 simonb Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    #include <sys/mbuf.h>
    #include <sys/socket.h>
    #include <sys/socketvar.h>
    
    #include <net/if.h>
    
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcidevs.h>
    
    #include <dev/ic/midwayreg.h>
    #include <dev/ic/midwayvar.h>
    
    
    /*
     * local structures
     */
    
    struct en_pci_softc {
      /* bus independent stuff */
      struct en_softc esc;          /* includes "device" structure */
    
      /* PCI bus glue */
      void *sc_ih;                  /* interrupt handle */
      pci_chipset_tag_t en_pc;      /* for PCI calls */
    
    };
    
    /*
     * local defines (PCI specific stuff)
     */
    
    #if !defined(MIDWAY_ENIONLY)
    static  void eni_get_macaddr __P((struct en_pci_softc *,
                    struct pci_attach_args *));
    #endif
    #if !defined(MIDWAY_ADPONLY)
    static  void adp_get_macaddr __P((struct en_pci_softc *,
                    struct pci_attach_args *));
    #endif
    
    /* 
     * address of config base memory address register in PCI config space
     * (this is card specific)
     */
            
    #define PCI_CBMA        0x10
    
    /*
    * tonga (pci bridge).   ENI cards only!
    */
   
   #define EN_TONGA        0x60            /* PCI config addr of tonga reg */
   
   #define TONGA_SWAP_DMA  0x80            /* endian swap control */
   #define TONGA_SWAP_BYTE 0x40
   #define TONGA_SWAP_WORD 0x20
   
   /*
    * adaptec pci bridge.   ADP cards only!
    */
   
   #define ADP_PCIREG      0x050040        /* PCI control register */
   
   #define ADP_PCIREG_RESET        0x1     /* reset card */
   #define ADP_PCIREG_IENABLE      0x2     /* interrupt enable */
   #define ADP_PCIREG_SWAP_WORD    0x4     /* swap byte on slave access */
   #define ADP_PCIREG_SWAP_DMA     0x8     /* swap bytes on DMA */
   
   /*
    * prototypes
    */
   
   static  int en_pci_match __P((struct device *, struct cfdata *, void *));
   static  void en_pci_attach __P((struct device *, struct device *, void *));
   
   /*
    * PCI autoconfig attachments
    */
   
   CFATTACH_DECL(en_pci, sizeof(struct en_pci_softc),
       en_pci_match, en_pci_attach, NULL, NULL);
   
   #if !defined(MIDWAY_ENIONLY)
   
   static void adp_busreset __P((void *));
   
   /*
    * bus specific reset function [ADP only!]
    */
   
   static void adp_busreset(v)
   
   void *v;
   
   {
     struct en_softc *sc = (struct en_softc *) v;
     u_int32_t dummy;
   
     bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG, ADP_PCIREG_RESET);
     DELAY(1000);  /* let it reset */
     dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
     bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG, 
                   (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA|ADP_PCIREG_IENABLE));
     dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
     if ((dummy & (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA)) !=
                   (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA))
       printf("adp_busreset: Adaptec ATM did NOT reset!\n");
   
   }
   #endif
   
   /***********************************************************************/
   
   /*
    * autoconfig stuff
    */
   
   static int en_pci_match(parent, match, aux)
   
   struct device *parent;
   struct cfdata *match;
   void *aux;
   
   {
     struct pci_attach_args *pa = (struct pci_attach_args *) aux;
   
   #if !defined(MIDWAY_ADPONLY)
     if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_EFFICIENTNETS && 
         (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PF ||
          PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PA))
       return 1;
   #endif
   
   #if !defined(MIDWAY_ENIONLY)
     if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ADP && 
         (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ADP_AIC5900 ||
          PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ADP_AIC5905))
       return 1;
   #endif
   
     return 0;
   }
   
   
   static void en_pci_attach(parent, self, aux)
   
   struct device *parent, *self;
   void *aux;
   
   {
     struct en_softc *sc = (void *)self;
     struct en_pci_softc *scp = (void *)self;
     struct pci_attach_args *pa = aux;
     pci_intr_handle_t ih;
     const char *intrstr;
     int retval;
   
     aprint_naive(": ATM controller\n");
     aprint_normal("\n");
   
     sc->is_adaptec = (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ADP) ? 1 : 0;
     scp->en_pc = pa->pa_pc;
   
     /*
      * make sure bus mastering is enabled
      */
     pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
       pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
       PCI_COMMAND_MASTER_ENABLE);
   
     /*
      * interrupt map
      */
   
     if (pci_intr_map(pa, &ih)) {
       aprint_error("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
       return;
     }
     intrstr = pci_intr_string(scp->en_pc, ih);
     scp->sc_ih = pci_intr_establish(scp->en_pc, ih, IPL_NET, en_intr, sc);
     if (scp->sc_ih == NULL) {
       aprint_error("%s: couldn't establish interrupt\n", sc->sc_dev.dv_xname);
       if (intrstr != NULL)
         aprint_normal(" at %s", intrstr);
       aprint_normal("\n");
       return;
     }
     aprint_normal("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
     sc->ipl = 1; /* XXX */
   
     /*
      * memory map
      */
   
     retval = pci_mapreg_map(pa, PCI_CBMA,
                             PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT, 0,
                             &sc->en_memt, &sc->en_base, NULL, &sc->en_obmemsz);
     if (retval) {
       aprint_error("%s: couldn't map memory\n", sc->sc_dev.dv_xname);
       return;
     }
           
     /*
      * set up pci bridge
      */
   
   #if !defined(MIDWAY_ENIONLY)
     if (sc->is_adaptec) {
       adp_get_macaddr(scp, pa);
       sc->en_busreset = adp_busreset;
       adp_busreset(sc);
     }
   #endif
   
   #if !defined(MIDWAY_ADPONLY)
     if (!sc->is_adaptec) {
       eni_get_macaddr(scp, pa);
       sc->en_busreset = NULL;
       pci_conf_write(scp->en_pc, pa->pa_tag, EN_TONGA, 
                     (TONGA_SWAP_DMA|TONGA_SWAP_WORD));
     }
   #endif
   
     /*
      * done PCI specific stuff
      */
   
     en_attach(sc);
   
   }
   
   #if 0
   static void
   en_pci_shutdown(
           int howto,
           void *sc)
   {
       struct en_pci_softc *psc = (struct en_pci_softc *)sc;
       
       en_reset(&psc->esc);
       DELAY(10);
   }
   #endif
   
   #if !defined(MIDWAY_ENIONLY)
   
   #if defined(sparc) || defined(__FreeBSD__)
   #define bus_space_read_1(t, h, o) \
                   ((void)t, (*(volatile u_int8_t *)((h) + (o))))
   #endif
   
   static void 
   adp_get_macaddr(scp, pa)
        struct en_pci_softc *scp;
        struct pci_attach_args *pa;
   {
     struct en_softc * sc = (struct en_softc *)scp;
     int lcv;
   
     for (lcv = 0; lcv < sizeof(sc->macaddr); lcv++)
       sc->macaddr[lcv] = bus_space_read_1(sc->en_memt, sc->en_base,
                                           MID_ADPMACOFF + lcv);
   }
   
   #endif /* MIDWAY_ENIONLY */
   
   #if !defined(MIDWAY_ADPONLY)
   
   /*
    * Read station (MAC) address from serial EEPROM.
    * derived from linux drivers/atm/eni.c by Werner Almesberger, EPFL LRC.
    */
   #define EN_PROM_MAGIC  0x0c
   #define EN_PROM_DATA   0x02
   #define EN_PROM_CLK    0x01
   #define EN_ESI         64
   
   static void 
   eni_get_macaddr(scp, pa)
     struct en_pci_softc *scp;
     struct pci_attach_args *pa;
   {
     struct en_softc *sc = (struct en_softc *)scp;
     pci_chipset_tag_t id = scp->en_pc;
     pcitag_t tag = pa->pa_tag;
     int i, j, address;
     u_int32_t data, t_data;
     u_int8_t tmp;
     
     t_data = pci_conf_read(id, tag, EN_TONGA) & 0xffffff00;
   
     data =  EN_PROM_MAGIC | EN_PROM_DATA | EN_PROM_CLK;
     pci_conf_write(id, tag, EN_TONGA, data);
   
     for (i = 0; i < sizeof(sc->macaddr); i ++){
       /* start operation */
       data |= EN_PROM_DATA ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data |= EN_PROM_CLK ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data &= ~EN_PROM_DATA ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data &= ~EN_PROM_CLK ;
       pci_conf_write(id, tag, EN_TONGA, data);
       /* send address with serial line */
       address = ((i + EN_ESI) << 1) + 1;
       for ( j = 7 ; j >= 0 ; j --){
         data = (address >> j) & 1 ? data | EN_PROM_DATA :
         data & ~EN_PROM_DATA;
         pci_conf_write(id, tag, EN_TONGA, data);
         data |= EN_PROM_CLK ;
         pci_conf_write(id, tag, EN_TONGA, data);
         data &= ~EN_PROM_CLK ;
         pci_conf_write(id, tag, EN_TONGA, data);
       }
       /* get ack */
       data |= EN_PROM_DATA ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data |= EN_PROM_CLK ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data = pci_conf_read(id, tag, EN_TONGA);
       data &= ~EN_PROM_CLK ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data |= EN_PROM_DATA ;
       pci_conf_write(id, tag, EN_TONGA, data);
   
       tmp = 0;
   
       for ( j = 7 ; j >= 0 ; j --){
         tmp <<= 1;
         data |= EN_PROM_DATA ;
         pci_conf_write(id, tag, EN_TONGA, data);
         data |= EN_PROM_CLK ;
         pci_conf_write(id, tag, EN_TONGA, data);
         data = pci_conf_read(id, tag, EN_TONGA);
         if(data & EN_PROM_DATA) tmp |= 1;
         data &= ~EN_PROM_CLK ;
         pci_conf_write(id, tag, EN_TONGA, data);
         data |= EN_PROM_DATA ;
         pci_conf_write(id, tag, EN_TONGA, data);
       }
       /* get ack */
       data |= EN_PROM_DATA ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data |= EN_PROM_CLK ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data = pci_conf_read(id, tag, EN_TONGA);
       data &= ~EN_PROM_CLK ;
       pci_conf_write(id, tag, EN_TONGA, data);
       data |= EN_PROM_DATA ;
       pci_conf_write(id, tag, EN_TONGA, data);
   
       sc->macaddr[i] = tmp;
     }
     /* stop operation */
     data &=  ~EN_PROM_DATA;
     pci_conf_write(id, tag, EN_TONGA, data);
     data |=  EN_PROM_CLK;
     pci_conf_write(id, tag, EN_TONGA, data);
     data |=  EN_PROM_DATA;
     pci_conf_write(id, tag, EN_TONGA, data);
     pci_conf_write(id, tag, EN_TONGA, t_data);
   }
   
   #endif /* !MIDWAY_ADPONLY */

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