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sgc.c revision 1.2 
      1 /*	$NetBSD: sgc.c,v 1.2 2011/02/18 19:15:06 tsutsui Exp $	*/
      2 /*	$OpenBSD: sgc.c,v 1.6 2010/04/15 20:35:21 miod Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 2005, Miodrag Vallat
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     19  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     22  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     25  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  */
     29 
     30 /*
     31  * SGC bus attachment and mapping glue.
     32  */
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/device.h>
     37 #include <sys/kernel.h>
     38 #include <sys/bus.h>
     39 #include <sys/cpu.h>
     40 
     41 #include <machine/autoconf.h>
     42 #include <machine/hp300spu.h>
     43 
     44 #include <hp300/dev/sgcreg.h>
     45 #include <hp300/dev/sgcvar.h>
     46 
     47 #ifdef SGC_DEBUG
     48 #define DPRINTF(x)	printf x
     49 #else
     50 #define DPRINTF(x)	do {} while (/* CONSTCOND */ 0)
     51 #endif
     52 
     53 struct sgc_softc {
     54 	device_t sc_dev;
     55 	struct bus_space_tag sc_tag;
     56 };
     57 
     58 static int	sgcmatch(device_t, cfdata_t, void *);
     59 static void	sgcattach(device_t, device_t, void *);
     60 static int	sgcprint(void *, const char *);
     61 
     62 CFATTACH_DECL_NEW(sgc, sizeof(struct sgc_softc),
     63     sgcmatch, sgcattach, NULL, NULL);
     64 
     65 int
     66 sgcmatch(device_t parent, cfdata_t cf, void *aux)
     67 {
     68 	static int sgc_matched = 0;
     69 
     70 	/* Allow only one instance. */
     71 	if (sgc_matched)
     72 		return 0;
     73 
     74 	/*
     75 	 * Leave out machines which can not have an SGC bus.
     76 	 */
     77 
     78 	switch (machineid) {
     79 #if 0
     80 	case HP_362:
     81 	case HP_382:
     82 #endif
     83 	case HP_400:
     84 	case HP_425:
     85 	case HP_433:
     86 		return sgc_matched = 1;
     87 	default:
     88 		return 0;
     89 	}
     90 }
     91 
     92 void
     93 sgcattach(device_t parent, device_t self, void *aux)
     94 {
     95 	struct sgc_softc *sc;
     96 	struct sgc_attach_args saa;
     97 	paddr_t pa;
     98 	void *va;
     99 	int slot, rv;
    100 	bus_space_tag_t bst;
    101 	bus_space_handle_t bsh;
    102 
    103 	sc = device_private(self);
    104 	sc->sc_dev = self;
    105 	aprint_normal("\n");
    106 
    107 	bst = &sc->sc_tag;
    108 	memset(bst, 0, sizeof(struct bus_space_tag));
    109 	bst->bustype = HP300_BUS_SPACE_SGC;
    110 
    111 	for (slot = 0; slot < SGC_NSLOTS; slot++) {
    112 		pa = sgc_slottopa(slot);
    113 		if (bus_space_map(bst, pa, PAGE_SIZE, 0, &bsh) != 0) {
    114 			aprint_error_dev(self, "can't map slot %d\n", slot);
    115 			continue;
    116 		}
    117 		va = bus_space_vaddr(bst, bsh);
    118 
    119 		/* Check for hardware. */
    120 		rv = badaddr(va);
    121 		bus_space_unmap(bst, bsh, PAGE_SIZE);
    122 
    123 		if (rv != 0) {
    124 			DPRINTF(("%s: no valid device at slot %d\n",
    125 			    device_xname(self), slot));
    126 			continue;
    127 		}
    128 
    129 		memset(&saa, 0, sizeof(saa));
    130 		saa.saa_iot = bst;
    131 		saa.saa_slot = slot;
    132 
    133 		/* Attach matching device. */
    134 		config_found(self, &saa, sgcprint);
    135 	}
    136 }
    137 
    138 int
    139 sgcprint(void *aux, const char *pnp)
    140 {
    141 	struct sgc_attach_args *saa = aux;
    142 
    143 	if (pnp)
    144 		aprint_normal("unknown SGC card at %s", pnp);
    145 	aprint_normal(" slot %d", saa->saa_slot);
    146 	return UNCONF;
    147 }
    148 
    149 /*
    150  * Convert a slot number to a system physical address.
    151  * This is needed for bus_space.
    152  */
    153 paddr_t
    154 sgc_slottopa(int slot)
    155 {
    156 	paddr_t rval;
    157 
    158 	if (slot < 0 || slot >= SGC_NSLOTS)
    159 		rval = 0;
    160 	else
    161 		rval = SGC_BASE + (slot * SGC_DEVSIZE);
    162 
    163 	return rval;
    164 }
    165