1 /* $Id: imx23_apbh.c,v 1.2 2021/04/24 23:36:27 thorpej 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(self, &aa, 93 CFARG_SEARCH, apbh_search_crit_cb, 94 CFARG_EOL); 95 config_search(self, &aa, 96 CFARG_SEARCH, apbh_search_cb, 97 CFARG_EOL); 98 99 apbh_attached = 1; 100 101 return; 102 } 103 104 static int 105 apbh_detach(device_t self, int flags) 106 { 107 return 0; 108 } 109 110 static int 111 apbh_activate(device_t self, enum devact act) 112 { 113 return EOPNOTSUPP; 114 } 115 116 /* 117 * config_search_ia() callback function. 118 */ 119 static int 120 apbh_search_cb(device_t parent, cfdata_t cf, const int *locs, void *aux) 121 { 122 struct apb_attach_args *aa = aux; 123 124 aa->aa_name = cf->cf_name; 125 aa->aa_addr = cf->cf_loc[APBHCF_ADDR]; 126 aa->aa_size = cf->cf_loc[APBHCF_SIZE]; 127 aa->aa_irq = cf->cf_loc[APBHCF_IRQ]; 128 129 if (config_probe(parent, cf, aux)) 130 config_attach(parent, cf, aux, apbh_print, CFARG_EOL); 131 132 return 0; 133 } 134 135 /* 136 * config_search_ia() callback function which only applies to critical devices. 137 */ 138 static int 139 apbh_search_crit_cb(device_t parent, cfdata_t cf, const int *locs, void *aux) 140 { 141 struct apb_attach_args *aa = aux; 142 143 /* Return if not critical device. */ 144 if ((strcmp(cf->cf_name, "icoll") != 0) 145 && (strcmp(cf->cf_name, "apbdma") != 0)) 146 return 0; 147 148 aa->aa_name = cf->cf_name; 149 aa->aa_addr = cf->cf_loc[APBHCF_ADDR]; 150 aa->aa_size = cf->cf_loc[APBHCF_SIZE]; 151 aa->aa_irq = cf->cf_loc[APBHCF_IRQ]; 152 153 if (config_probe(parent, cf, aux)) 154 config_attach(parent, cf, aux, apbh_print, CFARG_EOL); 155 156 return 0; 157 } 158 159 /* 160 * Called from config_attach() 161 */ 162 static int 163 apbh_print(void *aux, const char *name __unused) 164 { 165 struct apb_attach_args *aa = aux; 166 167 if (aa->aa_addr != APBHCF_ADDR_DEFAULT) { 168 aprint_normal(" addr 0x%lx", aa->aa_addr); 169 if (aa->aa_size > APBHCF_SIZE_DEFAULT) 170 aprint_normal("-0x%lx", aa->aa_addr + aa->aa_size-1); 171 } 172 173 if (aa->aa_irq != APBHCF_IRQ_DEFAULT) 174 aprint_normal(" irq %d", aa->aa_irq); 175 176 return UNCONF; 177 } 178