FreeBSD/Linux Kernel Cross Reference
sys/dev/podulebus/if_ei.c

     /* $NetBSD: if_ei.c,v 1.14 2008/04/05 20:08:52 cegger Exp $ */
     
     /*-
      * Copyright (c) 2000, 2001 Ben Harris
      * 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. 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.
     */
    /*
     * if_ei.c -- driver for Acorn AKA25 Ether1 card
     */
    /*
     * This is not directly based on the arm32 ie driver, as that doesn't
     * use the MI 82586 driver, and generally looks a mess (not to mention
     * having dodgy copyright status).  Let's try again.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: if_ei.c,v 1.14 2008/04/05 20:08:52 cegger Exp $");
    
    #include <sys/param.h>
    
    #include <sys/device.h>
    #include <sys/malloc.h>
    #include <sys/reboot.h> /* For bootverbose */
    #include <sys/socket.h>
    #include <sys/syslog.h>
    #include <sys/systm.h>
    #include <net/if.h>
    #include <net/if_ether.h>
    #include <net/if_media.h>
    #include <sys/bus.h>
    #include <dev/ic/i82586reg.h>
    #include <dev/ic/i82586var.h>
    #include <dev/podulebus/podulebus.h>
    #include <dev/podulebus/podules.h>
    #include <dev/podulebus/if_eireg.h>
    
    /* Callbacks from the MI 82586 driver */
    static void ei_hwreset(struct ie_softc *, int);
    /* static void ei_hwinit(struct ie_softc *); */
    static void ei_attn(struct ie_softc *, int);
    static int ei_intrhook(struct ie_softc *, int);
    
    static void ei_copyin(struct ie_softc *, void *, int, size_t);
    static void ei_copyout(struct ie_softc *, const void *, int, size_t);
    static u_int16_t ei_read16(struct ie_softc *, int);
    static void ei_write16(struct ie_softc *, int, u_int16_t);
    static void ei_write24(struct ie_softc *, int, int);
    
    /* autoconfiguration glue */
    static int ei_match(struct device *, struct cfdata *, void *);
    static void ei_attach(struct device *, struct device *, void *);
    
    struct ei_softc {
            struct  ie_softc sc_ie;
            bus_space_tag_t         sc_ctl_t;
            bus_space_handle_t      sc_ctl_h;
            bus_space_tag_t         sc_mem_t;
            bus_space_handle_t      sc_mem_h;
            bus_space_tag_t         sc_rom_t;
            bus_space_handle_t      sc_rom_h;
            u_int8_t        sc_idrom[EI_ROMSIZE];
            void                    *sc_ih;
            struct          evcnt   sc_intrcnt;
    };
    
    CFATTACH_DECL(ei, sizeof(struct ei_softc),
        ei_match, ei_attach, NULL, NULL);
    
    static inline void
    ei_setpage(struct ei_softc *sc, int page)
    {
    
            bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_PAGE, page);
    }
    
    static inline void
    ei_cli(struct ei_softc *sc)
   {
   
           bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_CLI);
   }
   
   static int
   ei_match(struct device *parent, struct cfdata *cf, void *aux)
   {
           struct podulebus_attach_args *pa = aux;
   
           return pa->pa_product == PODULE_ETHER1;
   }
   
   static void
   ei_attach(struct device *parent, struct device *self, void *aux)
   {
           struct podulebus_attach_args *pa = aux;
           struct ei_softc *sc = device_private(self);
           int i;
           char descr[16];
   
           /* Set up bus spaces */
           sc->sc_ctl_t = sc->sc_mem_t = pa->pa_fast_t;
           bus_space_map(pa->pa_fast_t, pa->pa_fast_base, EI_MEMOFF, 0,
               &sc->sc_ctl_h);
           bus_space_map(pa->pa_fast_t, pa->pa_fast_base + EI_MEMOFF,
               EI_PAGESIZE * 2, 0, &sc->sc_mem_h);
           sc->sc_rom_t = pa->pa_sync_t;
           bus_space_map(pa->pa_sync_t, pa->pa_sync_base, EI_ROMSIZE, 0,
               &sc->sc_rom_h);
   
           /* Set up callbacks */
           sc->sc_ie.hwinit = NULL;
           sc->sc_ie.intrhook = ei_intrhook;
           sc->sc_ie.hwreset = ei_hwreset;
           sc->sc_ie.chan_attn = ei_attn;
   
           sc->sc_ie.memcopyin = ei_copyin;
           sc->sc_ie.memcopyout = ei_copyout;
   
           sc->sc_ie.ie_bus_barrier = NULL;
           sc->sc_ie.ie_bus_read16 = ei_read16;
           sc->sc_ie.ie_bus_write16 = ei_write16;
           sc->sc_ie.ie_bus_write24 = ei_write24;
   
           sc->sc_ie.do_xmitnopchain = 0; /* Does it listen? */
   
           sc->sc_ie.sc_mediachange = NULL;
           sc->sc_ie.sc_mediastatus = NULL;
   
           sc->sc_ie.bt = sc->sc_mem_t; /* XXX hope it doesn't use them */
           sc->sc_ie.bh = sc->sc_mem_h;
   
           printf(":");
   
           /* All Ether1s are 64k (I believe) */
           sc->sc_ie.sc_msize = EI_MEMSIZE;
   
           /* set up pointers to important on-card control structures */
           sc->sc_ie.iscp = 0;
           sc->sc_ie.scb = IE_ISCP_SZ;
           sc->sc_ie.scp = sc->sc_ie.sc_msize + IE_SCP_ADDR - (1 << 24);
   
           sc->sc_ie.buf_area = sc->sc_ie.scb + IE_SCB_SZ;
           sc->sc_ie.buf_area_sz =
               sc->sc_ie.sc_msize - IE_ISCP_SZ - IE_SCB_SZ - IE_SCP_SZ;
   
           /* Wipe the whole of the card's memory */
           for (i = 0; i < EI_NPAGES; i++) {
                   ei_setpage(sc, i);
                   bus_space_set_region_2(sc->sc_mem_t, sc->sc_mem_h,
                                          0, 0,EI_PAGESIZE / 2);
           }
   
           /* set up pointers to key structures */
           ei_write24(&sc->sc_ie, IE_SCP_ISCP((u_long)sc->sc_ie.scp),
                       (u_long) sc->sc_ie.iscp);
           ei_write16(&sc->sc_ie, IE_ISCP_SCB((u_long)sc->sc_ie.iscp),
                       (u_long) sc->sc_ie.scb);
           ei_write24(&sc->sc_ie, IE_ISCP_BASE((u_long)sc->sc_ie.iscp),
                       (u_long) sc->sc_ie.iscp);
   
           /* check if chip answers */
           if (i82586_proberam(&sc->sc_ie) == 0) {
                   printf(" memory probe failed\n");
                   return;
           }
   
           /* Read ROM */
           bus_space_read_region_1(sc->sc_rom_t, sc->sc_rom_h, 0,
                                   sc->sc_idrom, EI_ROMSIZE);
   
           snprintf(descr, 15, "AKA25 iss. %d", sc->sc_idrom[EI_ROM_HWREV]);
           i82586_attach(&sc->sc_ie, descr, sc->sc_idrom + EI_ROM_EADDR,
                         NULL, 0, 0);
   
           evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
               device_xname(self), "intr");
           sc->sc_ih = podulebus_irq_establish(pa->pa_ih, IPL_NET, i82586_intr,
               self, &sc->sc_intrcnt);
           ei_cli(sc);
   }
   
   static void
   ei_hwreset(struct ie_softc *sc_ie, int why)
   {
           struct ei_softc *sc = (struct ei_softc *)sc_ie;
   
           bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_RST);
           DELAY(1000);
           bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, 0);
           DELAY(1000);
           ei_cli(sc);
   }
   
   static int
   ei_intrhook(struct ie_softc *sc_ie, int why)
   {
           struct ei_softc *sc = (struct ei_softc *)sc_ie;
   
           switch (why) {
           case INTR_EXIT:
           case INTR_ACK:
                   ei_cli(sc);
                   break;
           }
           return 0;
   }
   
   static void
   ei_attn(struct ie_softc *sc_ie, int why)
   {
           struct ei_softc *sc = (void *)sc_ie;
   
           bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_CA);
   }
   
   /*
    * Various access functions to allow the MI 82586 driver to get at the
    * board's memory.  All memory accesses must go through these, as
    * nothing else knows how to manipulate the page register.  Note that
    * all addresses and lengths passed in are in bytes of actual data.
    * The bus_space functions deal in words, though, so we have to
    * convert on the way through.
    */
   
   static void
   ei_copyin(struct ie_softc *sc_ie, void *dest, int src, size_t size)
   {
           struct ei_softc *sc = (struct ei_softc *)sc_ie;
           int cnt, s, extra_byte;
           u_int16_t *wptr;
   
   #ifdef DIAGNOSTIC
           if (src % 2 != 0 || !ALIGNED_POINTER(dest, u_int16_t))
                   panic("%s: unaligned copyin", device_xname(&sc_ie->sc_dev));
   #endif
           wptr = dest;
           extra_byte = size % 2;
           size -= extra_byte;
           while (size > 0) {
                   cnt = EI_PAGESIZE - src % EI_PAGESIZE;
                   if (cnt > size)
                           cnt = size;
                   s = splnet();
                   ei_setpage(sc, ei_atop(src));
                   /* bus ops are in words */
                   bus_space_read_region_2(sc->sc_mem_t, sc->sc_mem_h,
                                           ei_atopo(src) / 2, wptr, cnt / 2);
                   splx(s);
                   src += cnt;
                   wptr += cnt / 2;
                   size -= cnt;
           }
           if (extra_byte) {
                   /* Do we need to be this careful? */
                   s = splnet();
                   ei_setpage(sc, ei_atop(src));
                   *(u_int8_t *)wptr =
                       bus_space_read_2(sc->sc_mem_t, sc->sc_mem_h,
                                        ei_atopo(src) / 2) & 0xff;
                   splx(s);
           }
   }
   
   static void
   ei_copyout(struct ie_softc *sc_ie, const void *src, int dest, size_t size)
   {
           struct ei_softc *sc = (struct ei_softc *)sc_ie;
           int cnt, s;
           const u_int16_t *wptr;
           u_int16_t *bounce = NULL;
   
   #ifdef DIAGNOSTIC
           if (dest % 2 != 0)
                   panic("%s: unaligned copyout", device_xname(&sc_ie->sc_dev));
   #endif
           if (!ALIGNED_POINTER(src, u_int16_t)) {
                   bounce = (u_int16_t *) malloc(size, M_DEVBUF, M_NOWAIT);
                   if (bounce == NULL)
                           panic("%s: no memory to align copyout",
                                 device_xname(&sc_ie->sc_dev));
                   memcpy(bounce, src, size);
                   src = bounce;
           }
           wptr = src;
           if (size % 2 != 0)
                   size++; /* This is safe, since the buffer is 16bit aligned */
           while (size > 0) {
                   cnt = EI_PAGESIZE - dest % EI_PAGESIZE;
                   if (cnt > size)
                           cnt = size;
                   s = splnet();
                   ei_setpage(sc, ei_atop(dest));
                   /* bus ops are in words */
                   bus_space_write_region_2(sc->sc_mem_t, sc->sc_mem_h,
                                            ei_atopo(dest) / 2, wptr, cnt / 2);
                   splx(s);
                   wptr += cnt / 2;
                   dest += cnt;
                   size -= cnt;
           }
           if (bounce != NULL)
                   free(bounce, M_DEVBUF);
   }
   
   static u_int16_t
   ei_read16(struct ie_softc *sc_ie, int addr)
   {
           struct ei_softc *sc = (struct ei_softc *)sc_ie;
           int result, s;
   
   #ifdef DIAGNOSTIC
           if (addr % 2 != 0)
                   panic("%s: unaligned read16", device_xname(&sc_ie->sc_dev));
   #endif
           s = splnet();
           ei_setpage(sc, ei_atop(addr));
           result = bus_space_read_2(sc->sc_mem_t, sc->sc_mem_h,
                                     ei_atopo(addr) / 2);
           splx(s);
           return result;
   }
   
   static void
   ei_write16(struct ie_softc *sc_ie, int addr, u_int16_t value)
   {
           struct ei_softc *sc = (struct ei_softc *)sc_ie;
           int s;
   
   #ifdef DIAGNOSTIC
           if (addr % 2 != 0)
                   panic("%s: unaligned write16", device_xname(&sc_ie->sc_dev));
   #endif
           s = splnet();
           ei_setpage(sc, ei_atop(addr));
           bus_space_write_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(addr) / 2,
                             value);
           splx(s);
   }
   
   static void
   ei_write24(struct ie_softc *sc_ie, int addr, int value)
   {
           int s;
   
   #ifdef DIAGNOSTIC
           if (addr % 2 != 0)
                   panic("%s: unaligned write24", device_xname(&sc_ie->sc_dev));
   #endif
           s = splnet();
           ei_write16(sc_ie, addr, value & 0xffff);
           ei_write16(sc_ie, addr + 2, (value >> 16) & 0xff);
           splx(s);
   }
   

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