FreeBSD/Linux Kernel Cross Reference
sys/dev/mvme/if_ie_mvme.c

     /*      $NetBSD: if_ie_mvme.c,v 1.21 2021/11/10 17:19:30 msaitoh Exp $  */
     
     /*-
      * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Steve C. Woodford.
      *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION OR CONTRIBUTORS
     * 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>
    __KERNEL_RCSID(0, "$NetBSD: if_ie_mvme.c,v 1.21 2021/11/10 17:19:30 msaitoh Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/mbuf.h>
    #include <sys/errno.h>
    #include <sys/device.h>
    #include <sys/protosw.h>
    #include <sys/socket.h>
    
    #include <net/if.h>
    #include <net/if_dl.h>
    #include <net/if_types.h>
    #include <net/if_ether.h>
    #include <net/if_media.h>
    
    #include <machine/autoconf.h>
    #include <sys/cpu.h>
    #include <sys/bus.h>
    
    #include <dev/ic/i82586reg.h>
    #include <dev/ic/i82586var.h>
    
    #include <dev/mvme/if_iereg.h>
    #include <dev/mvme/pcctwovar.h>
    #include <dev/mvme/pcctworeg.h>
    
    
    int ie_pcctwo_match(device_t, cfdata_t, void *);
    void ie_pcctwo_attach(device_t, device_t, void *);
    
    struct ie_pcctwo_softc {
            struct ie_softc ps_ie;
            bus_space_tag_t ps_bust;
            bus_space_handle_t ps_bush;
            struct evcnt ps_evcnt;
    };
    
    CFATTACH_DECL_NEW(ie_pcctwo, sizeof(struct ie_pcctwo_softc),
        ie_pcctwo_match, ie_pcctwo_attach, NULL, NULL);
    
    extern struct cfdriver ie_cd;
    
    
    /* Functions required by the i82586 MI driver */
    static void ie_reset(struct ie_softc *, int);
    static int ie_intrhook(struct ie_softc *, int);
    static void ie_hwinit(struct ie_softc *);
    static void ie_atten(struct ie_softc *, int);
    
    static void ie_copyin(struct ie_softc *, void *, int, size_t);
    static void ie_copyout(struct ie_softc *, const void *, int, size_t);
    
    static u_int16_t ie_read_16(struct ie_softc *, int);
    static void ie_write_16(struct ie_softc *, int, u_int16_t);
    static void ie_write_24(struct ie_softc *, int, int);
    
    /*
     * i82596 Support Routines for MVME1[67][27] and MVME187 Boards
     */
    static void
    ie_reset(struct ie_softc *sc, int why)
    {
            struct ie_pcctwo_softc *ps;
            u_int32_t scp_addr;
    
            ps = (struct ie_pcctwo_softc *) sc;
   
           switch (why) {
           case CHIP_PROBE:
           case CARD_RESET:
                   bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_UPPER,
                       IE_PORT_RESET);
                   bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_LOWER, 0);
                   delay(1000);
   
                   /*
                    * Set the BUSY and BUS_USE bytes here, since the MI code
                    * incorrectly assumes it can use byte addressing to set it.
                    * (due to wrong-endianness of the chip)
                    */
                   ie_write_16(sc, IE_ISCP_BUSY(sc->iscp), 1);
                   ie_write_16(sc, IE_SCP_BUS_USE(sc->scp), IE_BUS_USE);
   
                   scp_addr = sc->scp + (u_int) sc->sc_iobase;
                   scp_addr |= IE_PORT_ALT_SCP;
   
                   bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_UPPER,
                       scp_addr & 0xffff);
                   bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_LOWER,
                       (scp_addr >> 16) & 0xffff);
                   delay(1000);
                   break;
           }
   }
   
   /* ARGSUSED */
   static int
   ie_intrhook(struct ie_softc *sc, int when)
   {
           u_int8_t reg;
   
           if (when == INTR_EXIT) {
                   reg = pcc2_reg_read(sys_pcctwo, PCC2REG_ETH_ICSR);
                   reg |= PCCTWO_ICR_ICLR;
                   pcc2_reg_write(sys_pcctwo, PCC2REG_ETH_ICSR, reg);
           }
           return (0);
   }
   
   /* ARGSUSED */
   static void
   ie_hwinit(struct ie_softc *sc)
   {
           u_int8_t reg;
   
           reg = pcc2_reg_read(sys_pcctwo, PCC2REG_ETH_ICSR);
           reg |= PCCTWO_ICR_IEN | PCCTWO_ICR_ICLR;
           pcc2_reg_write(sys_pcctwo, PCC2REG_ETH_ICSR, reg);
   }
   
   /* ARGSUSED */
   static void
   ie_atten(struct ie_softc *sc, int reason)
   {
           struct ie_pcctwo_softc *ps;
   
           ps = (struct ie_pcctwo_softc *) sc;
           bus_space_write_4(ps->ps_bust, ps->ps_bush, IE_MPUREG_CA, 0);
   }
   
   static void
   ie_copyin(struct ie_softc *sc, void *dst, int offset, size_t size)
   {
           if (size == 0)          /* This *can* happen! */
                   return;
   
   #if 0
           bus_space_read_region_1(sc->bt, sc->bh, offset, dst, size);
   #else
           /* A minor optimisation ;-) */
           memcpy(dst, (void *) ((u_long) sc->bh + (u_long) offset), size);
   #endif
   }
   
   static void
   ie_copyout(struct ie_softc *sc, const void *src, int offset, size_t size)
   {
           if (size == 0)          /* This *can* happen! */
                   return;
   
   #if 0
           bus_space_write_region_1(sc->bt, sc->bh, offset, src, size);
   #else
           /* A minor optimisation ;-) */
           memcpy((void *) ((u_long) sc->bh + (u_long) offset), src, size);
   #endif
   }
   
   static u_int16_t
   ie_read_16(struct ie_softc *sc, int offset)
   {
   
           return (bus_space_read_2(sc->bt, sc->bh, offset));
   }
   
   static void
   ie_write_16(struct ie_softc *sc, int offset, u_int16_t value)
   {
   
           bus_space_write_2(sc->bt, sc->bh, offset, value);
   }
   
   static void
   ie_write_24(struct ie_softc *sc, int offset, int addr)
   {
   
           addr += (int) sc->sc_iobase;
   
           bus_space_write_2(sc->bt, sc->bh, offset, addr & 0xffff);
           bus_space_write_2(sc->bt, sc->bh, offset + 2, (addr >> 16) & 0x00ff);
   }
   
   /* ARGSUSED */
   int
   ie_pcctwo_match(device_t parent, cfdata_t cf, void *aux)
   {
           struct pcctwo_attach_args *pa;
   
           pa = aux;
   
           if (strcmp(pa->pa_name, ie_cd.cd_name))
                   return (0);
   
           pa->pa_ipl = cf->pcctwocf_ipl;
   
           return (1);
   }
   
   /* ARGSUSED */
   void
   ie_pcctwo_attach(device_t parent, device_t self, void *aux)
   {
           struct pcctwo_attach_args *pa;
           struct ie_pcctwo_softc *ps;
           struct ie_softc *sc;
           bus_dma_segment_t seg;
           int rseg;
   
           pa = aux;
           ps = device_private(self);
           sc = &ps->ps_ie;
           sc->sc_dev = self;
   
           /* Map the MPU controller registers in PCCTWO space */
           ps->ps_bust = pa->pa_bust;
           bus_space_map(pa->pa_bust, pa->pa_offset, IE_MPUREG_SIZE,
               0, &ps->ps_bush);
   
           /* Get contiguous DMA-able memory for the IE chip */
           if (bus_dmamem_alloc(pa->pa_dmat, ether_data_buff_size, PAGE_SIZE, 0,
                   &seg, 1, &rseg,
                   BUS_DMA_NOWAIT | BUS_DMA_ONBOARD_RAM | BUS_DMA_24BIT) != 0) {
                   aprint_error_dev(self, "Failed to allocate ether buffer\n");
                   return;
           }
           if (bus_dmamem_map(pa->pa_dmat, &seg, rseg, ether_data_buff_size,
               (void **) & sc->sc_maddr, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) {
                   aprint_error_dev(self, "Failed to map ether buffer\n");
                   bus_dmamem_free(pa->pa_dmat, &seg, rseg);
                   return;
           }
           sc->bt = pa->pa_bust;
           sc->bh = (bus_space_handle_t) sc->sc_maddr;     /* XXXSCW Better way? */
           sc->sc_iobase = (void *) seg.ds_addr;
           sc->sc_msize = ether_data_buff_size;
           memset(sc->sc_maddr, 0, ether_data_buff_size);
   
           sc->hwreset = ie_reset;
           sc->hwinit = ie_hwinit;
           sc->chan_attn = ie_atten;
           sc->intrhook = ie_intrhook;
           sc->memcopyin = ie_copyin;
           sc->memcopyout = ie_copyout;
           sc->ie_bus_barrier = NULL;
           sc->ie_bus_read16 = ie_read_16;
           sc->ie_bus_write16 = ie_write_16;
           sc->ie_bus_write24 = ie_write_24;
           sc->sc_mediachange = NULL;
           sc->sc_mediastatus = NULL;
   
           sc->scp = 0;
           sc->iscp = sc->scp + ((IE_SCP_SZ + 15) & ~15);
           sc->scb = sc->iscp + IE_ISCP_SZ;
           sc->buf_area = sc->scb + IE_SCB_SZ;
           sc->buf_area_sz = sc->sc_msize - (sc->buf_area - sc->scp);
   
           /*
            * BUS_USE -> Interrupt Active High (edge-triggered),
            *            Lock function enabled,
            *            Internal bus throttle timer triggering,
            *            82586 operating mode.
            */
           ie_write_16(sc, IE_SCP_BUS_USE(sc->scp), IE_BUS_USE);
           ie_write_24(sc, IE_SCP_ISCP(sc->scp), sc->iscp);
           ie_write_16(sc, IE_ISCP_SCB(sc->iscp), sc->scb);
           ie_write_24(sc, IE_ISCP_BASE(sc->iscp), sc->scp);
   
           /* This has the side-effect of resetting the chip */
           i82586_proberam(sc);
   
           /* Attach the MI back-end */
           i82586_attach(sc, "onboard", mvme_ea, NULL, 0, 0);
   
           /* Register the event counter */
           evcnt_attach_dynamic(&ps->ps_evcnt, EVCNT_TYPE_INTR,
               pcctwointr_evcnt(pa->pa_ipl), "ether", device_xname(self));
   
           /* Finally, hook the hardware interrupt */
           pcctwointr_establish(PCCTWOV_LANC_IRQ, i82586_intr, pa->pa_ipl, sc,
               &ps->ps_evcnt);
   }

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