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tc_vsbus.c revision 1.5 
      1 /*	$NetBSD: tc_vsbus.c,v 1.5 2010/12/14 23:31:17 matt Exp $	*/
      2 /*-
      3  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Matt Thomas <matt (at) 3am-software.com>.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/param.h>
     32 #include <sys/bus.h>
     33 #include <sys/cpu.h>
     34 #include <sys/device.h>
     35 
     36 #include <machine/pte.h>
     37 #include <machine/scb.h>
     38 #include <machine/vsbus.h>
     39 #include <dev/tc/tcvar.h>
     40 
     41 static int tcbus_match(device_t, cfdata_t, void *);
     42 static void tcbus_attach(device_t, device_t, void *);
     43 
     44 struct tcbus_softc {
     45 	struct tc_softc sc_tc;
     46 	struct tc_slotdesc sc_slots[1];
     47 	struct vax_bus_dma_tag sc_dmatag;
     48 	struct vax_sgmap sc_sgmap;
     49 	struct evcnt sc_ev;
     50 	bus_space_handle_t sc_memh;
     51 };
     52 
     53 static bus_dma_tag_t tcbus_dmat;
     54 
     55 CFATTACH_DECL(tcbus, sizeof(struct tcbus_softc),
     56     tcbus_match, tcbus_attach, 0, 0);
     57 
     58 static bus_dma_tag_t
     59 tcbus_get_dma_tag(int slotno)
     60 {
     61 	return tcbus_dmat;
     62 }
     63 
     64 static void
     65 tcbus_intr_establish(device_t dv, void *cookie, int level,
     66 	int (*func)(void *), void *arg)
     67 {
     68 	struct tcbus_softc * const sc = cookie;
     69 
     70 	scb_vecalloc(0x51, (void (*)(void *)) func, arg, SCB_ISTACK,
     71 	    &sc->sc_ev);
     72 }
     73 
     74 static void
     75 tcbus_intr_disestablish(device_t dv, void *cookie)
     76 {
     77 }
     78 
     79 static const struct evcnt *
     80 tcbus_intr_evcnt(device_t dv, void *cookie)
     81 {
     82 	return NULL;
     83 }
     84 
     85 int
     86 tcbus_match(device_t parent, cfdata_t cfdata, void *aux)
     87 {
     88 	return 0;
     89 }
     90 
     91 #define	KA4x_TURBO	0x30000000
     92 #define	KA4x_TURBOMAPS	0x35800000
     93 #define	KA4x_TURBOCSR	0x36800000
     94 
     95 void
     96 tcbus_attach(device_t parent, device_t self, void *aux)
     97 {
     98 	struct vsbus_attach_args * const va = aux;
     99 	struct tcbus_softc * const sc = device_private(self);
    100 	struct tcbus_attach_args tba;
    101 	struct pte *pte;
    102 	const size_t nentries = 32768;
    103 	int error;
    104 	int i;
    105 
    106 	error = bus_space_map(va->va_memt, KA4x_TURBO, 0x10000,
    107 	    BUS_SPACE_MAP_LINEAR, &sc->sc_memh);
    108 	if (error) {
    109 		aprint_error(": failed to map TC slot 0: %d\n", error);
    110 		return;
    111 	}
    112 
    113 	sc->sc_slots[0].tcs_addr = sc->sc_memh;
    114 	sc->sc_slots[0].tcs_cookie = sc;
    115 
    116 	tba.tba_speed = TC_SPEED_12_5_MHZ;
    117 	tba.tba_slots = sc->sc_slots;
    118 	tba.tba_nslots = 1;
    119 	tba.tba_intr_evcnt = tcbus_intr_evcnt;
    120 	tba.tba_intr_establish = tcbus_intr_establish;
    121 	tba.tba_intr_disestablish = tcbus_intr_disestablish;
    122 	tba.tba_get_dma_tag = tcbus_get_dma_tag;
    123 
    124 	vax_sgmap_dmatag_init(&sc->sc_dmatag, sc, nentries);
    125 	pte = (struct pte *) vax_map_physmem(KA4x_TURBOMAPS,
    126 	    nentries * sizeof(pte[0]));
    127 
    128 	for (i = nentries; i > 0; )
    129 		((uint32_t *) pte)[--i] = 0;
    130 
    131 	sc->sc_dmatag._sgmap = &sc->sc_sgmap;
    132 	/*
    133 	 * Initialize the SGMAP.
    134 	 */
    135 	vax_sgmap_init(&sc->sc_dmatag, &sc->sc_sgmap, "tc_sgmap",
    136 	     sc->sc_dmatag._wbase, sc->sc_dmatag._wsize, pte, 0);
    137 
    138 	aprint_normal("\n");
    139 
    140 	aprint_verbose_dev(self, "32K entry DMA SGMAP at PA 0x%x (VA %p)\n",
    141 	     KA4x_TURBOMAPS, pte);
    142 
    143 	tcbus_dmat = &sc->sc_dmatag;
    144 
    145 	tcattach(parent, self, &tba);
    146 }
    147