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obio.c revision 1.11 
      1 /*	$NetBSD: obio.c,v 1.11 2002/10/03 20:14:58 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2002 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 CFATTACH_DECL(obio, sizeof(struct device),
     63     obio_match, obio_attach, NULL, NULL);
     64 
     65 int	obio_print(void *, const char *);
     66 int	obio_search(struct device *, struct cfdata *, void *);
     67 
     68 /* there can be only one */
     69 int	obio_found;
     70 
     71 int
     72 obio_match(struct device *parent, struct cfdata *cf, void *aux)
     73 {
     74 #if 0
     75 	struct mainbus_attach_args *ma = aux;
     76 #endif
     77 
     78 	if (obio_found)
     79 		return (0);
     80 
     81 #if 1
     82 	/* XXX Shoot arch/arm/mainbus in the head. */
     83 	return (1);
     84 #else
     85 	if (strcmp(cf->cf_name, ma->ma_name) == 0)
     86 		return (1);
     87 
     88 	return (0);
     89 #endif
     90 }
     91 
     92 void
     93 obio_attach(struct device *parent, struct device *self, void *aux)
     94 {
     95 
     96 	obio_found = 1;
     97 
     98 #if defined(IOP310_TEAMASA_NPWR)
     99 	/*
    100 	 * These boards don't have revision/backplane detect registers.
    101 	 * Just ignore it.
    102 	 */
    103 	printf("\n");
    104 #else /* Default to stock IQ80310 */
    105     {
    106 	/*
    107 	 * Yes, we're using knowledge of the obio bus space internals,
    108 	 * here.
    109 	 */
    110 	uint8_t board_rev = CPLD_READ(IQ80310_BOARD_REV);
    111 	uint8_t cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
    112 	uint8_t backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
    113 
    114 	printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
    115 	    BOARD_REV(board_rev), CPLD_REV(cpld_rev),
    116 	    (backplane & 1) ? "" : "not ");
    117     }
    118 #endif /* list of IQ80310-based designs */
    119 
    120 	/*
    121 	 * Attach all the on-board devices as described in the kernel
    122 	 * configuration file.
    123 	 */
    124 	config_search(obio_search, self, NULL);
    125 }
    126 
    127 int
    128 obio_print(void *aux, const char *pnp)
    129 {
    130 	struct obio_attach_args *oba = aux;
    131 
    132 	printf(" addr 0x%08lx", oba->oba_addr);
    133 	if (oba->oba_irq != -1)
    134 		printf(" xint3 %d", IRQ_XINT3(oba->oba_irq));
    135 
    136 	return (UNCONF);
    137 }
    138 
    139 int
    140 obio_search(struct device *parent, struct cfdata *cf, void *aux)
    141 {
    142 	struct obio_attach_args oba;
    143 
    144 	oba.oba_st = &obio_bs_tag;
    145 	oba.oba_addr = cf->cf_loc[OBIOCF_ADDR];
    146 
    147 	if (cf->cf_loc[OBIOCF_XINT3] != OBIOCF_XINT3_DEFAULT)
    148 		oba.oba_irq = XINT3_IRQ(cf->cf_loc[OBIOCF_XINT3]);
    149 	else
    150 		oba.oba_irq = -1;
    151 
    152 	if (config_match(parent, cf, &oba) > 0)
    153 		config_attach(parent, cf, &oba, obio_print);
    154 
    155 	return (0);
    156 }
    157