sys/dev/sbus/lebuffer.c

   1 /*      $NetBSD: lebuffer.c,v 1.35 2009/09/17 17:51:52 tsutsui Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Paul Kranenburg.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: lebuffer.c,v 1.35 2009/09/17 17:51:52 tsutsui Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/errno.h>
  39 #include <sys/device.h>
  40 #include <sys/malloc.h>
  41
  42 #include <sys/bus.h>
  43 #include <machine/autoconf.h>
  44 #include <sys/cpu.h>
  45
  46 #include <dev/sbus/sbusvar.h>
  47 #include <dev/sbus/lebuffervar.h>
  48
  49 int     lebufprint(void *, const char *);
  50 int     lebufmatch(device_t, cfdata_t, void *);
  51 void    lebufattach(device_t, device_t, void *);
  52
  53 CFATTACH_DECL_NEW(lebuffer, sizeof(struct lebuf_softc),
  54     lebufmatch, lebufattach, NULL, NULL);
  55
  56 int
  57 lebufprint(void *aux, const char *busname)
  58 {
  59
  60         sbus_print(aux, busname);
  61         return (UNCONF);
  62 }
  63
  64 int
  65 lebufmatch(device_t parent, cfdata_t cf, void *aux)
  66 {
  67         struct sbus_attach_args *sa = aux;
  68
  69         return (strcmp(cf->cf_name, sa->sa_name) == 0);
  70 }
  71
  72 /*
  73  * Attach all the sub-devices we can find
  74  */
  75 void
  76 lebufattach(device_t parent, device_t self, void *aux)
  77 {
  78         struct sbus_attach_args *sa = aux;
  79         struct lebuf_softc *sc = device_private(self);
  80         struct sbus_softc *sbsc = device_private(parent);
  81         int node;
  82         int sbusburst;
  83         bus_space_tag_t bt = sa->sa_bustag;
  84         bus_dma_tag_t   dt = sa->sa_dmatag;
  85         bus_space_handle_t bh;
  86
  87         sc->sc_dev = self;
  88
  89         if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset, sa->sa_size,
  90                          BUS_SPACE_MAP_LINEAR, &bh) != 0) {
  91                 aprint_error(": cannot map registers\n");
  92                 return;
  93         }
  94
  95         /*
  96          * This device's "register space" is just a buffer where the
  97          * Lance ring-buffers can be stored. Note the buffer's location
  98          * and size, so the `le' driver can pick them up.
  99          */
 100         sc->sc_buffer = bus_space_vaddr(bt, bh);
 101         sc->sc_bufsiz = sa->sa_size;
 102
 103         node = sc->sc_node = sa->sa_node;
 104
 105         /*
 106          * Get transfer burst size from PROM
 107          */
 108         sbusburst = sbsc->sc_burst;
 109         if (sbusburst == 0)
 110                 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
 111
 112         sc->sc_burst = prom_getpropint(node, "burst-sizes", -1);
 113         if (sc->sc_burst == -1)
 114                 /* take SBus burst sizes */
 115                 sc->sc_burst = sbusburst;
 116
 117         /* Clamp at parent's burst sizes */
 118         sc->sc_burst &= sbusburst;
 119
 120         printf(": %dK memory\n", sc->sc_bufsiz / 1024);
 121
 122         /* search through children */
 123         for (node = firstchild(node); node; node = nextsibling(node)) {
 124                 struct sbus_attach_args sax;
 125                 sbus_setup_attach_args(sbsc,
 126                                        bt, dt, node, &sax);
 127                 (void)config_found(self, (void *)&sax, lebufprint);
 128                 sbus_destroy_attach_args(&sax);
 129         }
 130 }