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obio.c revision 1.4 
      1 /*	$NetBSD: obio.c,v 1.4 2002/02/07 21:34:24 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 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 #if defined(TEAMASA_NPWR)
     78 {
     79 	/*
     80 	 * There is only one UART on the Npwr.
     81 	 */
     82 	{ "com",	IQ80310_UART2,		XINT3_IRQ(XINT3_UART2) },
     83 
     84 	{ NULL,		0,			0 },
     85 };
     86 #else /* Default to stock IQ80310 */
     87 {
     88 	/*
     89 	 * Order these so the first UART matched is the one at J9
     90 	 * and the second is the one at J10.  (This is the same
     91 	 * ordering RedBoot uses.)
     92 	 */
     93 	{ "com",	IQ80310_UART2,		XINT3_IRQ(XINT3_UART2) },
     94 	{ "com",	IQ80310_UART1,		XINT3_IRQ(XINT3_UART1) },
     95 
     96 	{ NULL,		0,			0 },
     97 };
     98 #endif /* list of IQ80310-based designs */
     99 
    100 int
    101 obio_match(struct device *parent, struct cfdata *cf, void *aux)
    102 {
    103 #if 0
    104 	struct mainbus_attach_args *ma = aux;
    105 #endif
    106 
    107 	if (obio_found)
    108 		return (0);
    109 
    110 #if 1
    111 	/* XXX Shoot arch/arm/mainbus in the head. */
    112 	return (1);
    113 #else
    114 	if (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0)
    115 		return (1);
    116 
    117 	return (0);
    118 #endif
    119 }
    120 
    121 void
    122 obio_attach(struct device *parent, struct device *self, void *aux)
    123 {
    124 	struct obio_attach_args oba;
    125 	int i;
    126 	uint8_t board_rev, cpld_rev, backplane;
    127 
    128 	obio_found = 1;
    129 
    130 	/*
    131 	 * Yes, we're using knowledge of the obio bus space internals,
    132 	 * here.
    133 	 */
    134 	board_rev = CPLD_READ(IQ80310_BOARD_REV);
    135 	cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
    136 	backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
    137 
    138 	printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
    139 	    BOARD_REV(board_rev), CPLD_REV(cpld_rev),
    140 	    (backplane & 1) ? "" : "not ");
    141 
    142 	for (i = 0; obio_devices[i].od_name != NULL; i++) {
    143 		oba.oba_name = obio_devices[i].od_name;
    144 		oba.oba_st = &obio_bs_tag;
    145 		oba.oba_addr = obio_devices[i].od_addr;
    146 		oba.oba_irq = obio_devices[i].od_irq;
    147 		(void) config_found_sm(self, &oba, obio_print, obio_submatch);
    148 	}
    149 }
    150 
    151 int
    152 obio_print(void *aux, const char *pnp)
    153 {
    154 	struct obio_attach_args *oba = aux;
    155 
    156 	if (pnp)
    157 		printf("%s at %s", oba->oba_name, pnp);
    158 
    159 	printf(" addr 0x%08lx", oba->oba_addr);
    160 
    161 	return (UNCONF);
    162 }
    163 
    164 int
    165 obio_submatch(struct device *parent, struct cfdata *cf, void *aux)
    166 {
    167 	struct obio_attach_args *oba = aux;
    168 
    169 	if (cf->cf_loc[OBIOCF_ADDR] != OBIOCF_ADDR_DEFAULT &&
    170 	    cf->cf_loc[OBIOCF_ADDR] != oba->oba_addr)
    171 		return (0);
    172 
    173 	return ((*cf->cf_attach->ca_match)(parent, cf, aux));
    174 }
    175