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obio.c revision 1.3 
      1 /*	$NetBSD: obio.c,v 1.3 2001/11/19 19:08:33 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      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  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * On-board device autoconfiguration support for Intel IQ80310
     40  * evaluation boards.
     41  *
     42  * The "obio" device node handles all of the CPLD functions,
     43  * as well ... timer, interrupts, etc.
     44  */
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 
     50 #include <machine/autoconf.h>
     51 #include <machine/bus.h>
     52 
     53 #include <evbarm/iq80310/iq80310reg.h>
     54 #include <evbarm/iq80310/iq80310var.h>
     55 #include <evbarm/iq80310/obiovar.h>
     56 
     57 #include "locators.h"
     58 
     59 int	obio_match(struct device *, struct cfdata *, void *);
     60 void	obio_attach(struct device *, struct device *, void *);
     61 
     62 struct cfattach obio_ca = {
     63 	sizeof(struct device), obio_match, obio_attach,
     64 };
     65 
     66 int	obio_print(void *, const char *);
     67 int	obio_submatch(struct device *, struct cfdata *, void *);
     68 
     69 /* there can be only one */
     70 int	obio_found;
     71 
     72 struct {
     73 	const char *od_name;
     74 	bus_addr_t od_addr;
     75 	int od_irq;
     76 } obio_devices[] = {
     77 	/*
     78 	 * Order these so the first UART matched is the one at J9
     79 	 * and the second is the one at J10.  (This is the same
     80 	 * ordering RedBoot uses.)
     81 	 */
     82 	{ "com",	IQ80310_UART2,		XINT3_IRQ(XINT3_UART2) },
     83 	{ "com",	IQ80310_UART1,		XINT3_IRQ(XINT3_UART1) },
     84 
     85 	{ NULL,		0,			0 },
     86 };
     87 
     88 int
     89 obio_match(struct device *parent, struct cfdata *cf, void *aux)
     90 {
     91 #if 0
     92 	struct mainbus_attach_args *ma = aux;
     93 #endif
     94 
     95 	if (obio_found)
     96 		return (0);
     97 
     98 #if 1
     99 	/* XXX Shoot arch/arm/mainbus in the head. */
    100 	return (1);
    101 #else
    102 	if (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0)
    103 		return (1);
    104 
    105 	return (0);
    106 #endif
    107 }
    108 
    109 void
    110 obio_attach(struct device *parent, struct device *self, void *aux)
    111 {
    112 	struct obio_attach_args oba;
    113 	int i;
    114 	uint8_t board_rev, cpld_rev, backplane;
    115 
    116 	obio_found = 1;
    117 
    118 	/*
    119 	 * Yes, we're using knowledge of the obio bus space internals,
    120 	 * here.
    121 	 */
    122 	board_rev = CPLD_READ(IQ80310_BOARD_REV);
    123 	cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
    124 	backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
    125 
    126 	printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
    127 	    BOARD_REV(board_rev), CPLD_REV(cpld_rev),
    128 	    (backplane & 1) ? "" : "not ");
    129 
    130 	for (i = 0; obio_devices[i].od_name != NULL; i++) {
    131 		oba.oba_name = obio_devices[i].od_name;
    132 		oba.oba_st = &obio_bs_tag;
    133 		oba.oba_addr = obio_devices[i].od_addr;
    134 		oba.oba_irq = obio_devices[i].od_irq;
    135 		(void) config_found_sm(self, &oba, obio_print, obio_submatch);
    136 	}
    137 }
    138 
    139 int
    140 obio_print(void *aux, const char *pnp)
    141 {
    142 	struct obio_attach_args *oba = aux;
    143 
    144 	if (pnp)
    145 		printf("%s at %s", oba->oba_name, pnp);
    146 
    147 	printf(" addr 0x%08lx", oba->oba_addr);
    148 
    149 	return (UNCONF);
    150 }
    151 
    152 int
    153 obio_submatch(struct device *parent, struct cfdata *cf, void *aux)
    154 {
    155 	struct obio_attach_args *oba = aux;
    156 
    157 	if (cf->cf_loc[OBIOCF_ADDR] != OBIOCF_ADDR_DEFAULT &&
    158 	    cf->cf_loc[OBIOCF_ADDR] != oba->oba_addr)
    159 		return (0);
    160 
    161 	return ((*cf->cf_attach->ca_match)(parent, cf, aux));
    162 }
    163