imx31_ahb.c revision 1.2
1 /* $NetBSD: imx31_ahb.c,v 1.2 2008/04/27 18:58:44 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2005 Genetec Corporation. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec Corporation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project by 18 * Genetec Corporation. 19 * 4. The name of Genetec Corporation may not be used to endorse or 20 * promote products derived from this software without specific prior 21 * written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 * 35 * 36 * Autoconfiguration support for the Intel PXA2[15]0 application 37 * processor. This code is derived from arm/sa11x0/sa11x0.c 38 */ 39 40 /*- 41 * Copyright (c) 2001, The NetBSD Foundation, Inc. All rights reserved. 42 * 43 * This code is derived from software contributed to The NetBSD Foundation 44 * by IWAMOTO Toshihiro and Ichiro FUKUHARA. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the NetBSD 57 * Foundation, Inc. and its contributors. 58 * 4. Neither the name of The NetBSD Foundation nor the names of its 59 * contributors may be used to endorse or promote products derived 60 * from this software without specific prior written permission. 61 */ 62 /*- 63 * Copyright (c) 1999 64 * Shin Takemura and PocketBSD Project. All rights reserved. 65 * 66 * Redistribution and use in source and binary forms, with or without 67 * modification, are permitted provided that the following conditions 68 * are met: 69 * 1. Redistributions of source code must retain the above copyright 70 * notice, this list of conditions and the following disclaimer. 71 * 2. Redistributions in binary form must reproduce the above copyright 72 * notice, this list of conditions and the following disclaimer in the 73 * documentation and/or other materials provided with the distribution. 74 * 3. All advertising materials mentioning features or use of this software 75 * must display the following acknowledgement: 76 * This product includes software developed by the PocketBSD project 77 * and its contributors. 78 * 4. Neither the name of the project nor the names of its contributors 79 * may be used to endorse or promote products derived from this software 80 * without specific prior written permission. 81 * 82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 92 * SUCH DAMAGE. 93 * 94 */ 95 96 #include <sys/cdefs.h> 97 __KERNEL_RCSID(0, "$Id: imx31_ahb.c,v 1.2 2008/04/27 18:58:44 matt Exp $"); 98 99 #include "locators.h" 100 #include "avic.h" 101 #include "imxgpio.h" 102 103 #include <sys/param.h> 104 #include <sys/systm.h> 105 #include <sys/device.h> 106 #include <sys/kernel.h> 107 #include <sys/reboot.h> 108 109 #include <machine/cpu.h> 110 #include <machine/bus.h> 111 112 #include <arm/cpufunc.h> 113 #include <arm/mainbus/mainbus.h> 114 115 #include <machine/intr.h> 116 117 #include <arm/imx/imx31reg.h> 118 #include <arm/imx/imx31var.h> 119 120 struct ahb_softc { 121 struct device sc_dev; 122 bus_dma_tag_t sc_dmat; 123 bus_space_tag_t sc_memt; 124 bus_space_handle_t sc_memh; 125 }; 126 127 /* prototypes */ 128 static int ahb_match(device_t, cfdata_t, void *); 129 static void ahb_attach(device_t, device_t, void *); 130 static int ahb_search(device_t, cfdata_t, const int *, void *); 131 static void ahb_attach_critical(struct ahb_softc *); 132 static int ahbbus_print(void *, const char *); 133 134 /* attach structures */ 135 CFATTACH_DECL(ahb, sizeof(struct ahb_softc), 136 ahb_match, ahb_attach, NULL, NULL); 137 138 static struct ahb_softc *ahb_sc; 139 140 static int 141 ahb_match(device_t parent, cfdata_t match, void *aux) 142 { 143 return 1; 144 } 145 146 static void 147 ahb_attach(device_t parent, device_t self, void *aux) 148 { 149 struct ahb_softc *sc = (struct ahb_softc *)self; 150 extern struct bus_space imx31_bs_tag; 151 struct ahb_attach_args ahba; 152 153 ahb_sc = sc; 154 sc->sc_memt = &imx31_bs_tag; 155 #if NBUS_DMA_GENERIC > 0 156 sc->sc_dmat = &imx31_bus_dma_tag; 157 #else 158 sc->sc_dmat = 0; 159 #endif 160 161 aprint_normal(": AHB-Lite 2.v6 bus interface\n"); 162 163 /* 164 * Attach critical devices 165 */ 166 ahb_attach_critical(sc); 167 168 /* 169 * Attach all other devices 170 */ 171 ahba.ahba_name = "ahb"; 172 ahba.ahba_memt = sc->sc_memt; 173 ahba.ahba_dmat = sc->sc_dmat; 174 config_search_ia(ahb_search, self, "ahb", &ahba); 175 } 176 177 static int 178 ahb_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 179 { 180 struct ahb_attach_args * const ahba = aux; 181 182 ahba->ahba_addr = cf->cf_loc[AHBCF_ADDR]; 183 ahba->ahba_size = cf->cf_loc[AHBCF_SIZE]; 184 ahba->ahba_intr = cf->cf_loc[AHBCF_INTR]; 185 ahba->ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE]; 186 187 if (config_match(parent, cf, ahba)) 188 config_attach(parent, cf, ahba, ahbbus_print); 189 190 return 0; 191 } 192 193 static int 194 ahb_find(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 195 { 196 struct ahb_attach_args * const ahba = aux; 197 struct ahb_attach_args ahba0; 198 199 if (strcmp(ahba->ahba_name, "ahb")) 200 return 0; 201 if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT 202 && ahba->ahba_addr != cf->cf_loc[AHBCF_ADDR]) 203 return 0; 204 if (ahba->ahba_size != AHBCF_SIZE_DEFAULT 205 && ahba->ahba_size != cf->cf_loc[AHBCF_SIZE]) 206 return 0; 207 if (ahba->ahba_intr != AHBCF_INTR_DEFAULT 208 && ahba->ahba_intr != cf->cf_loc[AHBCF_INTR]) 209 return 0; 210 if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT 211 && ahba->ahba_irqbase != cf->cf_loc[AHBCF_IRQBASE]) 212 return 0; 213 214 ahba0 = *ahba; 215 ahba0.ahba_addr = cf->cf_loc[AHBCF_ADDR]; 216 ahba0.ahba_size = cf->cf_loc[AHBCF_SIZE]; 217 ahba0.ahba_intr = cf->cf_loc[AHBCF_INTR]; 218 ahba0.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE]; 219 220 return config_match(parent, cf, &ahba0); 221 } 222 223 #if NAVIC == 0 224 #error no avic present in config file 225 #endif 226 227 static const struct { 228 const char *name; 229 bus_addr_t addr; 230 bool required; 231 } critical_devs[] = { 232 { .name = "avic", .addr = INTC_BASE, .required = true }, 233 { .name = "gpio1", .addr = GPIO1_BASE, .required = false }, 234 { .name = "gpio2", .addr = GPIO2_BASE, .required = false }, 235 { .name = "gpio3", .addr = GPIO3_BASE, .required = false }, 236 #if 0 237 { .name = "dmac", .addr = DMAC_BASE, .required = true }, 238 #endif 239 }; 240 241 static void 242 ahb_attach_critical(struct ahb_softc *sc) 243 { 244 struct ahb_attach_args ahba; 245 cfdata_t cf; 246 size_t i; 247 248 for (i = 0; i < __arraycount(critical_devs); i++) { 249 ahba.ahba_name = "ahb"; 250 ahba.ahba_memt = sc->sc_memt; 251 ahba.ahba_dmat = sc->sc_dmat; 252 253 ahba.ahba_addr = critical_devs[i].addr; 254 ahba.ahba_size = AHBCF_SIZE_DEFAULT; 255 ahba.ahba_intr = AHBCF_INTR_DEFAULT; 256 ahba.ahba_irqbase = AHBCF_IRQBASE_DEFAULT; 257 258 cf = config_search_ia(ahb_find, &sc->sc_dev, "ahb", &ahba); 259 if (cf == NULL && critical_devs[i].required) 260 panic("ahb_attach_critical: failed to find %s!", 261 critical_devs[i].name); 262 263 ahba.ahba_addr = cf->cf_loc[AHBCF_ADDR]; 264 ahba.ahba_size = cf->cf_loc[AHBCF_SIZE]; 265 ahba.ahba_intr = cf->cf_loc[AHBCF_INTR]; 266 ahba.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE]; 267 config_attach(&sc->sc_dev, cf, &ahba, ahbbus_print); 268 } 269 } 270 271 static int 272 ahbbus_print(void *aux, const char *name) 273 { 274 struct ahb_attach_args *ahba = (struct ahb_attach_args*)aux; 275 276 if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT) { 277 aprint_normal(" addr 0x%lx", ahba->ahba_addr); 278 if (ahba->ahba_size > AHBCF_SIZE_DEFAULT) 279 aprint_normal("-0x%lx", 280 ahba->ahba_addr + ahba->ahba_size-1); 281 } 282 if (ahba->ahba_intr != AHBCF_INTR_DEFAULT) 283 aprint_normal(" intr %d", ahba->ahba_intr); 284 if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT) 285 aprint_normal(" irqbase %d", ahba->ahba_irqbase); 286 287 return (UNCONF); 288 } 289 290 static inline uint32_t 291 read_clock_counter_xsc1(void) 292 { 293 uint32_t x; 294 __asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (x) ); 295 296 return x; 297 } 298 299 static inline uint32_t 300 read_clock_counter_xsc2(void) 301 { 302 uint32_t x; 303 __asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (x) ); 304 305 return x; 306 } 307 308
Indexes created Mon Sep 22 21:09:42 GMT 2025