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