Home | History | Annotate | Line # | Download | only in iq80310 
      1 /*	$NetBSD: obio.c,v 1.22 2021/08/07 16:18:49 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2002, 2003  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/cdefs.h>
     47 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.22 2021/08/07 16:18:49 thorpej Exp $");
     48 
     49 #include <sys/param.h>
     50 #include <sys/systm.h>
     51 #include <sys/device.h>
     52 
     53 #include <machine/autoconf.h>
     54 #include <sys/bus.h>
     55 
     56 #include <evbarm/iq80310/iq80310reg.h>
     57 #include <evbarm/iq80310/iq80310var.h>
     58 #include <evbarm/iq80310/obiovar.h>
     59 
     60 #include "locators.h"
     61 
     62 int	obio_match(device_t, cfdata_t, void *);
     63 void	obio_attach(device_t, device_t, void *);
     64 
     65 CFATTACH_DECL_NEW(obio, 0,
     66     obio_match, obio_attach, NULL, NULL);
     67 
     68 int	obio_print(void *, const char *);
     69 int	obio_search(device_t, cfdata_t, const int *, void *);
     70 
     71 /* there can be only one */
     72 bool	obio_found;
     73 
     74 int
     75 obio_match(device_t parent, cfdata_t cf, void *aux)
     76 {
     77 #if 0
     78 	struct mainbus_attach_args *ma = aux;
     79 #endif
     80 
     81 	if (obio_found)
     82 		return (0);
     83 
     84 #if 1
     85 	/* XXX Shoot arch/arm/mainbus in the head. */
     86 	return (1);
     87 #else
     88 	if (strcmp(cf->cf_name, ma->ma_name) == 0)
     89 		return (1);
     90 
     91 	return (0);
     92 #endif
     93 }
     94 
     95 void
     96 obio_attach(device_t parent, device_t self, void *aux)
     97 {
     98 
     99 	obio_found = true;
    100 
    101 #if defined(IOP310_TEAMASA_NPWR)
    102 	/*
    103 	 * These boards don't have revision/backplane detect registers.
    104 	 * Just ignore it.
    105 	 */
    106 	printf("\n");
    107 #else /* Default to stock IQ80310 */
    108     {
    109 	/*
    110 	 * Yes, we're using knowledge of the obio bus space internals,
    111 	 * here.
    112 	 */
    113 	uint8_t board_rev = CPLD_READ(IQ80310_BOARD_REV);
    114 	uint8_t cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
    115 	uint8_t backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
    116 
    117 	printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
    118 	    BOARD_REV(board_rev), CPLD_REV(cpld_rev),
    119 	    (backplane & 1) ? "" : "not ");
    120     }
    121 #endif /* list of IQ80310-based designs */
    122 
    123 	/*
    124 	 * Attach all the on-board devices as described in the kernel
    125 	 * configuration file.
    126 	 */
    127 	config_search(self, NULL,
    128 	    CFARGS(.search = obio_search));
    129 }
    130 
    131 int
    132 obio_print(void *aux, const char *pnp)
    133 {
    134 	struct obio_attach_args *oba = aux;
    135 
    136 	aprint_normal(" addr 0x%08lx", oba->oba_addr);
    137 	if (oba->oba_size != OBIOCF_SIZE_DEFAULT)
    138 		aprint_normal("-0x%08lx", oba->oba_addr + (oba->oba_size - 1));
    139 	if (oba->oba_width != OBIOCF_WIDTH_DEFAULT)
    140 		aprint_normal(" width %d", oba->oba_width);
    141 	if (oba->oba_irq != -1)
    142 		aprint_normal(" xint3 %d", IRQ_XINT3(oba->oba_irq));
    143 
    144 	return (UNCONF);
    145 }
    146 
    147 int
    148 obio_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
    149 {
    150 	struct obio_attach_args oba;
    151 
    152 	oba.oba_st = &obio_bs_tag;
    153 	oba.oba_addr = cf->cf_loc[OBIOCF_ADDR];
    154 	oba.oba_size = cf->cf_loc[OBIOCF_SIZE];
    155 	oba.oba_width = cf->cf_loc[OBIOCF_WIDTH];
    156 	if (cf->cf_loc[OBIOCF_XINT3] != OBIOCF_XINT3_DEFAULT)
    157 		oba.oba_irq = XINT3_IRQ(cf->cf_loc[OBIOCF_XINT3]);
    158 	else
    159 		oba.oba_irq = -1;
    160 
    161 	if (config_probe(parent, cf, &oba))
    162 		config_attach(parent, cf, &oba, obio_print, CFARGS_NONE);
    163 
    164 	return (0);
    165 }
    166