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obio.c revision 1.2 
      1 /*	$NetBSD: obio.c,v 1.2 2001/11/07 02:24:18 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 	{ "com",	IQ80310_UART1,		XINT3_IRQ(XINT3_UART1) },
     78 	{ "com",	IQ80310_UART2,		XINT3_IRQ(XINT3_UART2) },
     79 
     80 	{ NULL,		0,			0 },
     81 };
     82 
     83 int
     84 obio_match(struct device *parent, struct cfdata *cf, void *aux)
     85 {
     86 #if 0
     87 	struct mainbus_attach_args *ma = aux;
     88 #endif
     89 
     90 	if (obio_found)
     91 		return (0);
     92 
     93 #if 1
     94 	/* XXX Shoot arch/arm/mainbus in the head. */
     95 	return (1);
     96 #else
     97 	if (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0)
     98 		return (1);
     99 
    100 	return (0);
    101 #endif
    102 }
    103 
    104 void
    105 obio_attach(struct device *parent, struct device *self, void *aux)
    106 {
    107 	struct obio_attach_args oba;
    108 	int i;
    109 	uint8_t board_rev, cpld_rev, backplane;
    110 
    111 	obio_found = 1;
    112 
    113 	/*
    114 	 * Yes, we're using knowledge of the obio bus space internals,
    115 	 * here.
    116 	 */
    117 	board_rev = CPLD_READ(IQ80310_BOARD_REV);
    118 	cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
    119 	backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
    120 
    121 	printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
    122 	    BOARD_REV(board_rev), CPLD_REV(cpld_rev),
    123 	    (backplane & 1) ? "" : "not ");
    124 
    125 	for (i = 0; obio_devices[i].od_name != NULL; i++) {
    126 		oba.oba_name = obio_devices[i].od_name;
    127 		oba.oba_st = &obio_bs_tag;
    128 		oba.oba_addr = obio_devices[i].od_addr;
    129 		oba.oba_irq = obio_devices[i].od_irq;
    130 		(void) config_found_sm(self, &oba, obio_print, obio_submatch);
    131 	}
    132 }
    133 
    134 int
    135 obio_print(void *aux, const char *pnp)
    136 {
    137 	struct obio_attach_args *oba = aux;
    138 
    139 	if (pnp)
    140 		printf("%s at %s", oba->oba_name, pnp);
    141 
    142 	printf(" addr 0x%08lx", oba->oba_addr);
    143 
    144 	return (UNCONF);
    145 }
    146 
    147 int
    148 obio_submatch(struct device *parent, struct cfdata *cf, void *aux)
    149 {
    150 	struct obio_attach_args *oba = aux;
    151 
    152 	if (cf->cf_loc[OBIOCF_ADDR] != OBIOCF_ADDR_DEFAULT &&
    153 	    cf->cf_loc[OBIOCF_ADDR] != oba->oba_addr)
    154 		return (0);
    155 
    156 	return ((*cf->cf_attach->ca_match)(parent, cf, aux));
    157 }
    158