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imx23_apbh.c revision 1.1 
      1 /* $Id: imx23_apbh.c,v 1.1 2012/11/20 19:06:12 jkunz Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Petri Laakso.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/param.h>
     33 #include <sys/bus.h>
     34 #include <sys/device.h>
     35 #include <sys/errno.h>
     36 
     37 #include <arm/mainbus/mainbus.h>
     38 
     39 #include <arm/imx/imx23var.h>
     40 
     41 #include "locators.h"
     42 
     43 static int	apbh_match(device_t, cfdata_t, void *);
     44 static void	apbh_attach(device_t, device_t, void *);
     45 static int	apbh_detach(device_t, int);
     46 static int	apbh_activate(device_t, enum devact);
     47 
     48 static int	apbh_search_cb(device_t, cfdata_t, const int *, void *);
     49 static int	apbh_search_crit_cb(device_t, cfdata_t, const int *, void *);
     50 static int	apbh_print(void *,const char *);
     51 
     52 struct apbh_softc {
     53 	device_t	sc_dev;
     54 	device_t	dmac; /* DMA controller device for this bus. */
     55 };
     56 
     57 CFATTACH_DECL3_NEW(apbh,
     58 	sizeof(struct apbh_softc),
     59 	apbh_match,
     60 	apbh_attach,
     61 	apbh_detach,
     62 	apbh_activate,
     63 	NULL,
     64 	NULL,
     65 	0);
     66 
     67 static int
     68 apbh_match(device_t parent, cfdata_t match, void *aux)
     69 {
     70 	struct mainbus_attach_args *mb = aux;
     71 
     72 	if ((mb->mb_iobase == APBH_BASE) && (mb->mb_iosize == APBH_SIZE))
     73 		return 1;
     74 
     75 	return 0;
     76 }
     77 
     78 static void
     79 apbh_attach(device_t parent, device_t self, void *aux)
     80 {
     81 	struct apb_attach_args aa;
     82 	static int apbh_attached = 0;
     83 
     84 	if (apbh_attached)
     85 		return;
     86 
     87 	aa.aa_iot = &imx23_bus_space;
     88 	aa.aa_dmat = &imx23_bus_dma_tag;
     89 
     90 	aprint_normal("\n");
     91 
     92 	config_search_ia(apbh_search_crit_cb, self, "apbh", &aa);
     93 	config_search_ia(apbh_search_cb, self, "apbh", &aa);
     94 
     95 	apbh_attached = 1;
     96 
     97 	return;
     98 }
     99 
    100 static int
    101 apbh_detach(device_t self, int flags)
    102 {
    103 	return 0;
    104 }
    105 
    106 static int
    107 apbh_activate(device_t self, enum devact act)
    108 {
    109 	return EOPNOTSUPP;
    110 }
    111 
    112 /*
    113  * config_search_ia() callback function.
    114  */
    115 static int
    116 apbh_search_cb(device_t parent, cfdata_t cf, const int *locs, void *aux)
    117 {
    118 	struct apb_attach_args *aa = aux;
    119 
    120 	aa->aa_name = cf->cf_name;
    121 	aa->aa_addr = cf->cf_loc[APBHCF_ADDR];
    122 	aa->aa_size = cf->cf_loc[APBHCF_SIZE];
    123 	aa->aa_irq = cf->cf_loc[APBHCF_IRQ];
    124 
    125 	if (config_match(parent, cf, aux) > 0)
    126 		config_attach(parent, cf, aux, apbh_print);
    127 
    128 	return 0;
    129 }
    130 
    131 /*
    132  * config_search_ia() callback function which only applies to critical devices.
    133  */
    134 static int
    135 apbh_search_crit_cb(device_t parent, cfdata_t cf, const int *locs, void *aux)
    136 {
    137 	struct apb_attach_args *aa = aux;
    138 
    139 	/* Return if not critical device. */
    140 	if ((strcmp(cf->cf_name, "icoll") != 0)
    141 	    && (strcmp(cf->cf_name, "apbdma") != 0))
    142 		return 0;
    143 
    144 	aa->aa_name = cf->cf_name;
    145 	aa->aa_addr = cf->cf_loc[APBHCF_ADDR];
    146 	aa->aa_size = cf->cf_loc[APBHCF_SIZE];
    147 	aa->aa_irq = cf->cf_loc[APBHCF_IRQ];
    148 
    149 	if (config_match(parent, cf, aux) > 0)
    150 		config_attach(parent, cf, aux, apbh_print);
    151 
    152 	return 0;
    153 }
    154 
    155 /*
    156  * Called from config_attach()
    157  */
    158 static int
    159 apbh_print(void *aux, const char *name __unused)
    160 {
    161 	struct apb_attach_args *aa = aux;
    162 
    163 	if (aa->aa_addr != APBHCF_ADDR_DEFAULT) {
    164 		aprint_normal(" addr 0x%lx", aa->aa_addr);
    165 		if (aa->aa_size > APBHCF_SIZE_DEFAULT)
    166 			aprint_normal("-0x%lx", aa->aa_addr + aa->aa_size-1);
    167 	}
    168 
    169 	if (aa->aa_irq != APBHCF_IRQ_DEFAULT)
    170 		aprint_normal(" irq %d", aa->aa_irq);
    171 
    172 	return UNCONF;
    173 }
    174