1 /* $NetBSD: opb.c,v 1.14 2003/07/25 10:12:44 scw Exp $ */ 2 3 /* 4 * Copyright 2001,2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge 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 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by Christopher G. Demetriou 52 * for the NetBSD Project. 53 * 4. The name of the author may not be used to endorse or promote products 54 * derived from this software without specific prior written permission 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 58 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 60 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 61 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 65 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: opb.c,v 1.14 2003/07/25 10:12:44 scw Exp $"); 70 71 #include "locators.h" 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/device.h> 76 #include <sys/extent.h> 77 78 #include <powerpc/spr.h> 79 #include <powerpc/ibm4xx/dev/opbvar.h> 80 #include <powerpc/ibm4xx/dev/plbvar.h> 81 #include <powerpc/ibm4xx/ibm405gp.h> 82 83 /* 84 * The devices on the On-chip Peripheral Bus to the 405GP cpu. 85 */ 86 const struct opb_dev { 87 int pvr; 88 const char *name; 89 bus_addr_t addr; 90 int irq; 91 } opb_devs [] = { 92 { IBM405GP, "com", IBM405GP_UART0_BASE, 0 }, 93 { IBM405GP, "com", IBM405GP_UART1_BASE, 1 }, 94 { IBM405GP, "emac", IBM405GP_EMAC0_BASE, 9 }, /* XXX: really irq 9..15 */ 95 { IBM405GP, "gpio", IBM405GP_GPIO0_BASE, -1 }, 96 { IBM405GP, "iic", IBM405GP_IIC0_BASE, 2 }, 97 { IBM405GP, "wdog", -1, -1 }, 98 { 0, NULL } 99 }; 100 101 const struct opb_limit { 102 int pvr; 103 bus_addr_t base; 104 bus_addr_t limit; 105 } opb_limits[] = { 106 { IBM405GP, IBM405GP_UART0_BASE, IBM405GP_UART0_BASE + 0xfff }, 107 { 0, 0, 0 } 108 }; 109 110 static int opb_match(struct device *, struct cfdata *, void *); 111 static void opb_attach(struct device *, struct device *, void *); 112 static int opb_submatch(struct device *, struct cfdata *, void *); 113 static int opb_print(void *, const char *); 114 115 CFATTACH_DECL(opb, sizeof(struct device), 116 opb_match, opb_attach, NULL, NULL); 117 118 static struct powerpc_bus_space opb_tag = { 119 _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE, 120 0x0, IBM405GP_UART0_BASE, 0x1000 121 }; 122 static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)] 123 __attribute__((aligned(8))); 124 static int opb_tag_init_done; 125 126 /* 127 * Probe for the opb; always succeeds. 128 */ 129 static int 130 opb_match(struct device *parent, struct cfdata *cf, void *aux) 131 { 132 struct opb_attach_args *oaa = aux; 133 134 /* match only opb devices */ 135 if (strcmp(oaa->opb_name, cf->cf_name) != 0) 136 return (0); 137 138 return (1); 139 } 140 141 static int 142 opb_submatch(struct device *parent, struct cfdata *cf, void *aux) 143 { 144 struct opb_attach_args *oaa = aux; 145 146 if (cf->cf_loc[OPBCF_ADDR] != OPBCF_ADDR_DEFAULT && 147 cf->cf_loc[OPBCF_ADDR] != oaa->opb_addr) 148 return (0); 149 150 return (config_match(parent, cf, aux)); 151 } 152 153 /* 154 * Attach the on-chip peripheral bus. 155 */ 156 static void 157 opb_attach(struct device *parent, struct device *self, void *aux) 158 { 159 struct plb_attach_args *paa = aux; 160 struct opb_attach_args oaa; 161 bus_space_tag_t tag; 162 int i, pvr; 163 164 printf("\n"); 165 pvr = mfpvr() >> 16; 166 167 tag = opb_get_bus_space_tag(); 168 169 for (i = 0; opb_devs[i].name != NULL; i++) { 170 if (opb_devs[i].pvr != pvr) 171 continue; 172 oaa.opb_name = opb_devs[i].name; 173 oaa.opb_addr = opb_devs[i].addr; 174 oaa.opb_irq = opb_devs[i].irq; 175 oaa.opb_bt = tag; 176 oaa.opb_dmat = paa->plb_dmat; 177 178 (void) config_found_sm(self, &oaa, opb_print, opb_submatch); 179 } 180 } 181 182 static int 183 opb_print(void *aux, const char *pnp) 184 { 185 struct opb_attach_args *oaa = aux; 186 187 if (pnp) 188 aprint_normal("%s at %s", oaa->opb_name, pnp); 189 190 if (oaa->opb_addr != OPBCF_ADDR_DEFAULT) 191 aprint_normal(" addr 0x%08lx", oaa->opb_addr); 192 if (oaa->opb_irq != OPBCF_IRQ_DEFAULT) 193 aprint_normal(" irq %d", oaa->opb_irq); 194 195 return (UNCONF); 196 } 197 198 bus_space_tag_t 199 opb_get_bus_space_tag(void) 200 { 201 int i, pvr; 202 203 if (!opb_tag_init_done) { 204 pvr = mfpvr() >> 16; 205 206 for (i = 0; opb_limits[i].pvr && opb_limits[i].pvr != pvr; i++) 207 ; 208 if (opb_limits[i].pvr == 0) 209 panic("opb_get_bus_space_tag: no limits for this CPU!"); 210 211 opb_tag.pbs_base = opb_limits[i].base; 212 opb_tag.pbs_limit = opb_limits[i].limit; 213 214 if (bus_space_init(&opb_tag, "opbtag", 215 ex_storage, sizeof(ex_storage))) 216 panic("opb_attach: Failed to initialise opb_tag"); 217 opb_tag_init_done = 1; 218 } 219 220 return (&opb_tag); 221 } 222