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

     /*      $NetBSD: if_en_pci.c,v 1.1 1996/06/22 02:00:31 chuck 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.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/9.0/sys/dev/en/if_en_pci.c 223624 2011-06-28 08:36:48Z kevlo $");
    
    /*
     * i f _ e n _ p c i . c  
     *
     * author: Chuck Cranor <chuck@ccrc.wustl.edu>
     * started: spring, 1996.
     *
     * FreeBSD PCI glue for the eni155p card.
     * thanks to Matt Thomas for figuring out FreeBSD vs NetBSD vs etc.. diffs.
     */
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/systm.h>
    #include <sys/socket.h>
    #include <sys/sysctl.h>
    #include <sys/condvar.h>
    
    #include <sys/bus.h>
    #include <machine/bus.h>
    #include <sys/rman.h>
    #include <machine/resource.h>
    
    #include <vm/uma.h>
    
    #include <net/if.h>
    #include <net/if_atm.h>
    #include <net/if_media.h>
    #include <net/if_types.h>
    
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    
    #include <dev/utopia/utopia.h>
    #include <dev/en/midwayreg.h>
    #include <dev/en/midwayvar.h>
    
    MODULE_DEPEND(en, pci, 1, 1, 1);
    MODULE_DEPEND(en, atm, 1, 1, 1);
    MODULE_DEPEND(en, utopia, 1, 1, 1);
    
    /*
     * local structures
     */
    struct en_pci_softc {
            /* bus independent stuff */
            struct en_softc esc;    /* includes "device" structure */
    
            /* freebsd newbus glue */
            struct resource *res;   /* resource descriptor for registers */
            struct resource *irq;   /* resource descriptor for interrupt */
            void *ih;               /* interrupt handle */
    };
    
    static  void eni_get_macaddr(device_t, struct en_pci_softc *);
    static  void adp_get_macaddr(struct en_pci_softc *);
    
    /* 
     * address of config base memory address register in PCI config space
     * (this is card specific)
     */
    #define PCI_CBMA        PCIR_BAR(0)
    
   /*
    * 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
   #define TONGA_READ_MULT 0x00
   #define TONGA_READ_MEM  0x04
   #define TONGA_READ_IVAN 0x08
   #define TONGA_READ_KEN  0x0C
   
   /*
    * 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 byte on DMA */
   
   #define PCI_VENDOR_EFFICIENTNETS 0x111a                 /* Efficent Networks */
   #define PCI_PRODUCT_EFFICIENTNETS_ENI155PF 0x0000       /* ENI-155P ATM */
   #define PCI_PRODUCT_EFFICIENTNETS_ENI155PA 0x0002       /* ENI-155P ATM */
   #define PCI_VENDOR_ADP 0x9004                           /* adaptec */
   #define PCI_PRODUCT_ADP_AIC5900 0x5900
   #define PCI_PRODUCT_ADP_AIC5905 0x5905
   #define PCI_VENDOR(x)           ((x) & 0xFFFF)
   #define PCI_CHIPID(x)           (((x) >> 16) & 0xFFFF)
   
   /*
    * bus specific reset function [ADP only!]
    */
   static void
   adp_busreset(void *v)
   {
           struct en_softc *sc = (struct en_softc *)v;
           uint32_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_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_DMA)
                   device_printf(sc->dev, "%s: Adaptec ATM did NOT reset!\n",
                       __func__);
   }
   
   /***********************************************************************/
   
   /*
    * autoconfig stuff
    */
   static int
   en_pci_probe(device_t dev)
   {
   
           switch (pci_get_vendor(dev)) {
   
             case PCI_VENDOR_EFFICIENTNETS:
                   switch (pci_get_device(dev)) {
   
                       case PCI_PRODUCT_EFFICIENTNETS_ENI155PF:
                       case PCI_PRODUCT_EFFICIENTNETS_ENI155PA:
                           device_set_desc(dev, "Efficient Networks ENI-155p");
                           return (BUS_PROBE_DEFAULT);
                   }
                   break;
   
             case PCI_VENDOR_ADP:
                   switch (pci_get_device(dev)) {
   
                     case PCI_PRODUCT_ADP_AIC5900:
                     case PCI_PRODUCT_ADP_AIC5905:
                           device_set_desc(dev, "Adaptec 155 ATM");
                           return (BUS_PROBE_DEFAULT);
                   }
                   break;
           }
           return (ENXIO);
   }
   
   static int
   en_pci_attach(device_t dev)
   {
           struct en_softc *sc;
           struct en_pci_softc *scp;
           int rid, error = 0;
   
           sc = device_get_softc(dev);
           scp = (struct en_pci_softc *)sc;
           sc->dev = dev;  
           sc->ifp = if_alloc(IFT_ATM);
           if (sc->ifp == NULL) {
                   device_printf(dev, "can not if_alloc()\n");
                   error = ENOSPC;
                   goto fail;
           }
   
           if_initname(sc->ifp, device_get_name(dev),
               device_get_unit(dev));
   
           /*
            * Enable bus mastering.
            */
           pci_enable_busmaster(dev);
   
           /*
            * Map control/status registers.
            */
           rid = PCI_CBMA;
           scp->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
               RF_ACTIVE);
           if (scp->res == NULL) {
                   device_printf(dev, "could not map memory\n");
                   if_free(sc->ifp);
                   error = ENXIO;
                   goto fail;
           }
   
           sc->en_memt = rman_get_bustag(scp->res);
           sc->en_base = rman_get_bushandle(scp->res);
   
           /*
            * Allocate our interrupt.
            */
           rid = 0;
           scp->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
               RF_SHAREABLE | RF_ACTIVE);
           if (scp->irq == NULL) {
                   device_printf(dev, "could not map interrupt\n");
                   bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
                   if_free(sc->ifp);
                   error = ENXIO;
                   goto fail;
           }
   
           sc->ipl = 1; /* XXX (required to enable interrupt on midway) */
   
           /* figure out if we are an adaptec card or not */
           sc->is_adaptec = (pci_get_vendor(dev) == PCI_VENDOR_ADP) ? 1 : 0;
   
           /*
            * set up pci bridge
            */
           if (sc->is_adaptec) {
                   adp_get_macaddr(scp);
                   sc->en_busreset = adp_busreset;
                   adp_busreset(sc);
           } else {
                   eni_get_macaddr(dev, scp);
                   sc->en_busreset = NULL;
                   pci_write_config(dev, EN_TONGA, TONGA_SWAP_DMA | TONGA_READ_IVAN, 4);
           }
   
           /*
            * Common attach stuff
            */
           if ((error = en_attach(sc)) != 0) {
                   device_printf(dev, "attach failed\n");
                   bus_teardown_intr(dev, scp->irq, scp->ih);
                   bus_release_resource(dev, SYS_RES_IRQ, 0, scp->irq);
                   bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
                   if_free(sc->ifp);
                   goto fail;
           }
   
           /*
            * Do the interrupt SETUP last just before returning
            */
           error = bus_setup_intr(dev, scp->irq, INTR_TYPE_NET,
               NULL, en_intr, sc, &scp->ih);
           if (error) {
                   en_reset(sc);
                   atm_ifdetach(sc->ifp);
                   device_printf(dev, "could not setup irq\n");
                   bus_release_resource(dev, SYS_RES_IRQ, 0, scp->irq);
                   bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
                   en_destroy(sc);
                   if_free(sc->ifp);
                   goto fail;
           }
   
           return (0);
   
       fail:
           return (error);
   }
   
   /*
    * Detach the adapter
    */
   static int
   en_pci_detach(device_t dev)
   {
           struct en_softc *sc = device_get_softc(dev);
           struct en_pci_softc *scp = (struct en_pci_softc *)sc;
   
           /*
            * Stop DMA and drop transmit queue.
            */
           if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING)) {
                   device_printf(sc->dev, "still running\n");
                   sc->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
           }
   
           /*
            * Close down routes etc.
            */
           en_reset(sc);
           atm_ifdetach(sc->ifp);
   
           /*
            * Deallocate resources.
            */
           bus_teardown_intr(dev, scp->irq, scp->ih);
           bus_release_resource(dev, SYS_RES_IRQ, 0, scp->irq);
           bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
   
           /*
            * Free all the driver internal resources
            */
           en_destroy(sc);
           if_free(sc->ifp);
   
           return (0);
   }
   
   static int
   en_pci_shutdown(device_t dev)
   {
           struct en_pci_softc *psc = device_get_softc(dev);
   
           en_reset(&psc->esc);
           DELAY(10);              /* is this necessary? */
   
           return (0);
   }
   
   /*
    * Get the MAC address from an Adaptec board. No idea how to get
    * serial number or other stuff, because I have no documentation for that
    * card.
    */
   static void 
   adp_get_macaddr(struct en_pci_softc *scp)
   {
           struct en_softc * sc = (struct en_softc *)scp;
           int lcv;
   
           for (lcv = 0; lcv < sizeof(IFP2IFATM(sc->ifp)->mib.esi); lcv++)
                   IFP2IFATM(sc->ifp)->mib.esi[lcv] = bus_space_read_1(sc->en_memt,
                       sc->en_base, MID_ADPMACOFF + lcv);
   }
   
   /*
    * 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
   #define EN_SERIAL       112
   
   /*
    * Read a byte from the given address in the EEPROM
    */
   static uint8_t
   eni_get_byte(device_t dev, uint32_t *data, u_int address)
   {
           int j;
           uint8_t tmp;
   
           address = (address << 1) + 1;
   
           /* start operation */
           *data |= EN_PROM_DATA ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data |= EN_PROM_CLK ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data &= ~EN_PROM_DATA ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data &= ~EN_PROM_CLK ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           /* send address with serial line */
           for ( j = 7 ; j >= 0 ; j --) {
                   *data = ((address >> j) & 1) ? (*data | EN_PROM_DATA) :
                       (*data & ~EN_PROM_DATA);
                   pci_write_config(dev, EN_TONGA, *data, 4);
                   *data |= EN_PROM_CLK ;
                   pci_write_config(dev, EN_TONGA, *data, 4);
                   *data &= ~EN_PROM_CLK ;
                   pci_write_config(dev, EN_TONGA, *data, 4);
           }
           /* get ack */
           *data |= EN_PROM_DATA ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data |= EN_PROM_CLK ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data = pci_read_config(dev, EN_TONGA, 4);
           *data &= ~EN_PROM_CLK ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data |= EN_PROM_DATA ;
           pci_write_config(dev, EN_TONGA, *data, 4);
   
           tmp = 0;
   
           for ( j = 7 ; j >= 0 ; j --) {
                   tmp <<= 1;
                   *data |= EN_PROM_DATA ;
                   pci_write_config(dev, EN_TONGA, *data, 4);
                   *data |= EN_PROM_CLK ;
                   pci_write_config(dev, EN_TONGA, *data, 4);
                   *data = pci_read_config(dev, EN_TONGA, 4);
                   if(*data & EN_PROM_DATA) tmp |= 1;
                   *data &= ~EN_PROM_CLK ;
                   pci_write_config(dev, EN_TONGA, *data, 4);
                   *data |= EN_PROM_DATA ;
                   pci_write_config(dev, EN_TONGA, *data, 4);
           }
           /* get ack */
           *data |= EN_PROM_DATA ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data |= EN_PROM_CLK ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data = pci_read_config(dev, EN_TONGA, 4);
           *data &= ~EN_PROM_CLK ;
           pci_write_config(dev, EN_TONGA, *data, 4);
           *data |= EN_PROM_DATA ;
           pci_write_config(dev, EN_TONGA, *data, 4);
   
           return (tmp);
   }
   
   /*
    * Get MAC address and other stuff from the EEPROM
    */
   static void 
   eni_get_macaddr(device_t dev, struct en_pci_softc *scp)
   {
           struct en_softc * sc = (struct en_softc *)scp;
           int i;
           uint32_t data, t_data;
   
           t_data = pci_read_config(dev, EN_TONGA, 4) & 0xffffff00;
   
           data =  EN_PROM_MAGIC | EN_PROM_DATA | EN_PROM_CLK;
           pci_write_config(dev, EN_TONGA, data, 4);
   
           for (i = 0; i < sizeof(IFP2IFATM(sc->ifp)->mib.esi); i ++)
                   IFP2IFATM(sc->ifp)->mib.esi[i] = eni_get_byte(dev, &data, i + EN_ESI);
   
           IFP2IFATM(sc->ifp)->mib.serial = 0;
           for (i = 0; i < 4; i++) {
                   IFP2IFATM(sc->ifp)->mib.serial <<= 8;
                   IFP2IFATM(sc->ifp)->mib.serial |= eni_get_byte(dev, &data, i + EN_SERIAL);
           }
           /* stop operation */
           data &=  ~EN_PROM_DATA;
           pci_write_config(dev, EN_TONGA, data, 4);
           data |=  EN_PROM_CLK;
           pci_write_config(dev, EN_TONGA, data, 4);
           data |=  EN_PROM_DATA;
           pci_write_config(dev, EN_TONGA, data, 4);
           pci_write_config(dev, EN_TONGA, t_data, 4);
   }
   
   /*
    * Driver infrastructure
    */
   static device_method_t en_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,         en_pci_probe),
           DEVMETHOD(device_attach,        en_pci_attach),
           DEVMETHOD(device_detach,        en_pci_detach),
           DEVMETHOD(device_shutdown,      en_pci_shutdown),
   
           { 0, 0 }
   };
   
   static driver_t en_driver = {
           "en",
           en_methods,
           sizeof(struct en_pci_softc),
   };
   
   static devclass_t en_devclass;
   
   DRIVER_MODULE(en, pci, en_driver, en_devclass, en_modevent, 0);

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