sys/arch/arm/imx/imx31_ahb.c

   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  *
  55  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  56  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  57  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  58  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  59  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  60  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  61  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  62  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  63  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  64  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  65  * POSSIBILITY OF SUCH DAMAGE.
  66  */
  67 /*-
  68  * Copyright (c) 1999
  69  *         Shin Takemura and PocketBSD Project. All rights reserved.
  70  *
  71  * Redistribution and use in source and binary forms, with or without
  72  * modification, are permitted provided that the following conditions
  73  * are met:
  74  * 1. Redistributions of source code must retain the above copyright
  75  *    notice, this list of conditions and the following disclaimer.
  76  * 2. Redistributions in binary form must reproduce the above copyright
  77  *    notice, this list of conditions and the following disclaimer in the
  78  *    documentation and/or other materials provided with the distribution.
  79  * 3. All advertising materials mentioning features or use of this software
  80  *    must display the following acknowledgement:
  81  *      This product includes software developed by the PocketBSD project
  82  *      and its contributors.
  83  * 4. Neither the name of the project nor the names of its contributors
  84  *    may be used to endorse or promote products derived from this software
  85  *    without specific prior written permission.
  86  *
  87  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  88  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  89  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  90  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  91  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  92  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  93  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  94  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  95  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  96  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  97  * SUCH DAMAGE.
  98  *
  99  */
 100
 101 #include <sys/cdefs.h>
 102 __KERNEL_RCSID(0, "$Id: imx31_ahb.c,v 1.3 2008/05/02 22:00:29 martin Exp $");
 103
 104 #include "locators.h"
 105 #include "avic.h"
 106 #include "imxgpio.h"
 107
 108 #include <sys/param.h>
 109 #include <sys/systm.h>
 110 #include <sys/device.h>
 111 #include <sys/kernel.h>
 112 #include <sys/reboot.h>
 113
 114 #include <machine/cpu.h>
 115 #include <machine/bus.h>
 116
 117 #include <arm/cpufunc.h>
 118 #include <arm/mainbus/mainbus.h>
 119
 120 #include <machine/intr.h>
 121
 122 #include <arm/imx/imx31reg.h>
 123 #include <arm/imx/imx31var.h>
 124
 125 struct ahb_softc {
 126         struct device sc_dev;
 127         bus_dma_tag_t sc_dmat;
 128         bus_space_tag_t sc_memt;
 129         bus_space_handle_t sc_memh;
 130 };
 131
 132 /* prototypes */
 133 static int      ahb_match(device_t, cfdata_t, void *);
 134 static void     ahb_attach(device_t, device_t, void *);
 135 static int      ahb_search(device_t, cfdata_t, const int *, void *);
 136 static void     ahb_attach_critical(struct ahb_softc *);
 137 static int      ahbbus_print(void *, const char *);
 138
 139 /* attach structures */
 140 CFATTACH_DECL(ahb, sizeof(struct ahb_softc),
 141     ahb_match, ahb_attach, NULL, NULL);
 142
 143 static struct ahb_softc *ahb_sc;
 144
 145 static int
 146 ahb_match(device_t parent, cfdata_t match, void *aux)
 147 {
 148         return 1;
 149 }
 150
 151 static void
 152 ahb_attach(device_t parent, device_t self, void *aux)
 153 {
 154         struct ahb_softc *sc = (struct ahb_softc *)self;
 155         extern struct bus_space imx31_bs_tag;
 156         struct ahb_attach_args ahba;
 157
 158         ahb_sc = sc;
 159         sc->sc_memt = &imx31_bs_tag;
 160 #if NBUS_DMA_GENERIC > 0
 161         sc->sc_dmat = &imx31_bus_dma_tag;
 162 #else
 163         sc->sc_dmat = 0;
 164 #endif
 165
 166         aprint_normal(": AHB-Lite 2.v6 bus interface\n");
 167
 168         /*
 169          * Attach critical devices
 170          */
 171         ahb_attach_critical(sc);
 172
 173         /*
 174          * Attach all other devices
 175          */
 176         ahba.ahba_name = "ahb";
 177         ahba.ahba_memt = sc->sc_memt;
 178         ahba.ahba_dmat = sc->sc_dmat;
 179         config_search_ia(ahb_search, self, "ahb", &ahba);
 180 }
 181
 182 static int
 183 ahb_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 184 {
 185         struct ahb_attach_args * const ahba = aux;
 186
 187         ahba->ahba_addr = cf->cf_loc[AHBCF_ADDR];
 188         ahba->ahba_size = cf->cf_loc[AHBCF_SIZE];
 189         ahba->ahba_intr = cf->cf_loc[AHBCF_INTR];
 190         ahba->ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
 191
 192         if (config_match(parent, cf, ahba))
 193                 config_attach(parent, cf, ahba, ahbbus_print);
 194
 195         return 0;
 196 }
 197
 198 static int
 199 ahb_find(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 200 {
 201         struct ahb_attach_args * const ahba = aux;
 202         struct ahb_attach_args ahba0;
 203
 204         if (strcmp(ahba->ahba_name, "ahb"))
 205                 return 0;
 206         if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT
 207             && ahba->ahba_addr != cf->cf_loc[AHBCF_ADDR])
 208                 return 0;
 209         if (ahba->ahba_size != AHBCF_SIZE_DEFAULT
 210             && ahba->ahba_size != cf->cf_loc[AHBCF_SIZE])
 211                 return 0;
 212         if (ahba->ahba_intr != AHBCF_INTR_DEFAULT
 213             && ahba->ahba_intr != cf->cf_loc[AHBCF_INTR])
 214                 return 0;
 215         if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT
 216             && ahba->ahba_irqbase != cf->cf_loc[AHBCF_IRQBASE])
 217                 return 0;
 218
 219         ahba0 = *ahba;
 220         ahba0.ahba_addr = cf->cf_loc[AHBCF_ADDR];
 221         ahba0.ahba_size = cf->cf_loc[AHBCF_SIZE];
 222         ahba0.ahba_intr = cf->cf_loc[AHBCF_INTR];
 223         ahba0.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
 224
 225         return config_match(parent, cf, &ahba0);
 226 }
 227
 228 #if NAVIC == 0
 229 #error no avic present in config file
 230 #endif
 231
 232 static const struct {
 233         const char *name;
 234         bus_addr_t addr;
 235         bool required;
 236 } critical_devs[] = {
 237         { .name = "avic", .addr = INTC_BASE, .required = true },
 238         { .name = "gpio1", .addr = GPIO1_BASE, .required = false },
 239         { .name = "gpio2", .addr = GPIO2_BASE, .required = false },
 240         { .name = "gpio3", .addr = GPIO3_BASE, .required = false },
 241 #if 0
 242         { .name = "dmac", .addr = DMAC_BASE, .required = true },
 243 #endif
 244 };
 245
 246 static void
 247 ahb_attach_critical(struct ahb_softc *sc)
 248 {
 249         struct ahb_attach_args ahba;
 250         cfdata_t cf;
 251         size_t i;
 252
 253         for (i = 0; i < __arraycount(critical_devs); i++) {
 254                 ahba.ahba_name = "ahb";
 255                 ahba.ahba_memt = sc->sc_memt;
 256                 ahba.ahba_dmat = sc->sc_dmat;
 257
 258                 ahba.ahba_addr = critical_devs[i].addr;
 259                 ahba.ahba_size = AHBCF_SIZE_DEFAULT;
 260                 ahba.ahba_intr = AHBCF_INTR_DEFAULT;
 261                 ahba.ahba_irqbase = AHBCF_IRQBASE_DEFAULT;
 262
 263                 cf = config_search_ia(ahb_find, &sc->sc_dev, "ahb", &ahba);
 264                 if (cf == NULL && critical_devs[i].required)
 265                         panic("ahb_attach_critical: failed to find %s!",
 266                             critical_devs[i].name);
 267
 268                 ahba.ahba_addr = cf->cf_loc[AHBCF_ADDR];
 269                 ahba.ahba_size = cf->cf_loc[AHBCF_SIZE];
 270                 ahba.ahba_intr = cf->cf_loc[AHBCF_INTR];
 271                 ahba.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
 272                 config_attach(&sc->sc_dev, cf, &ahba, ahbbus_print);
 273         }
 274 }
 275
 276 static int
 277 ahbbus_print(void *aux, const char *name)
 278 {
 279         struct ahb_attach_args *ahba = (struct ahb_attach_args*)aux;
 280
 281         if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT) {
 282                 aprint_normal(" addr 0x%lx", ahba->ahba_addr);
 283                 if (ahba->ahba_size > AHBCF_SIZE_DEFAULT)
 284                         aprint_normal("-0x%lx",
 285                             ahba->ahba_addr + ahba->ahba_size-1);
 286         }
 287         if (ahba->ahba_intr != AHBCF_INTR_DEFAULT)
 288                 aprint_normal(" intr %d", ahba->ahba_intr);
 289         if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT)
 290                 aprint_normal(" irqbase %d", ahba->ahba_irqbase);
 291
 292         return (UNCONF);
 293 }
 294
 295 static inline uint32_t
 296 read_clock_counter_xsc1(void)
 297 {
 298         uint32_t x;
 299         __asm volatile("mrc     p14, 0, %0, c1, c0, 0" : "=r" (x) );
 300
 301         return x;
 302 }
 303
 304 static inline uint32_t
 305 read_clock_counter_xsc2(void)
 306 {
 307         uint32_t x;
 308         __asm volatile("mrc     p14, 0, %0, c1, c1, 0" : "=r" (x) );
 309
 310         return x;
 311 }
 312