The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/freescale/vybrid/vf_src.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
    5  * All rights reserved.
    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  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 /*
   30  * Vybrid Family System Reset Controller (SRC)
   31  * Chapter 18, Vybrid Reference Manual, Rev. 5, 07/2013
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: head/sys/arm/freescale/vybrid/vf_src.c 326258 2017-11-27 15:04:10Z pfg $");
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/bus.h>
   40 #include <sys/kernel.h>
   41 #include <sys/module.h>
   42 #include <sys/malloc.h>
   43 #include <sys/rman.h>
   44 #include <sys/timeet.h>
   45 #include <sys/timetc.h>
   46 #include <sys/watchdog.h>
   47 
   48 #include <dev/ofw/openfirm.h>
   49 #include <dev/ofw/ofw_bus.h>
   50 #include <dev/ofw/ofw_bus_subr.h>
   51 
   52 #include <machine/bus.h>
   53 #include <machine/cpu.h>
   54 #include <machine/intr.h>
   55 
   56 #include <arm/freescale/vybrid/vf_src.h>
   57 #include <arm/freescale/vybrid/vf_common.h>
   58 
   59 #define SRC_SCR         0x00    /* SRC Control Register */
   60 #define SRC_SBMR1       0x04    /* SRC Boot Mode Register 1 */
   61 #define SRC_SRSR        0x08    /* SRC Status Register */
   62 #define SRC_SECR        0x0C    /* SRC_SECR */
   63 #define SRC_SICR        0x14    /* SRC Reset Interrupt Configuration Register */
   64 #define SRC_SIMR        0x18    /* SRC Interrupt Masking Register */
   65 #define SRC_SBMR2       0x1C    /* SRC Boot Mode Register 2 */
   66 #define SRC_GPR0        0x20    /* General Purpose Register */
   67 #define SRC_GPR1        0x24    /* General Purpose Register */
   68 #define SRC_GPR2        0x28    /* General Purpose Register */
   69 #define SRC_GPR3        0x2C    /* General Purpose Register */
   70 #define SRC_GPR4        0x30    /* General Purpose Register */
   71 #define SRC_MISC0       0x4C    /* MISC0 */
   72 #define SRC_MISC1       0x50    /* MISC1 */
   73 #define SRC_MISC2       0x54    /* MISC2 */
   74 #define SRC_MISC3       0x58    /* MISC3 */
   75 
   76 struct src_softc {
   77         struct resource         *res[1];
   78         bus_space_tag_t         bst;
   79         bus_space_handle_t      bsh;
   80 };
   81 
   82 struct src_softc *src_sc;
   83 
   84 static struct resource_spec src_spec[] = {
   85         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   86         { -1, 0 }
   87 };
   88 
   89 int
   90 src_swreset(void)
   91 {
   92 
   93         if (src_sc == NULL)
   94                 return (1);
   95 
   96         WRITE4(src_sc, SRC_SCR, SW_RST);
   97 
   98         return (0);
   99 }
  100 
  101 static int
  102 src_probe(device_t dev)
  103 {
  104 
  105         if (!ofw_bus_status_okay(dev))
  106                 return (ENXIO);
  107 
  108         if (!ofw_bus_is_compatible(dev, "fsl,mvf600-src"))
  109                 return (ENXIO);
  110 
  111         device_set_desc(dev, "Vybrid Family System Reset Controller");
  112         return (BUS_PROBE_DEFAULT);
  113 }
  114 
  115 static int
  116 src_attach(device_t dev)
  117 {
  118         struct src_softc *sc;
  119 
  120         sc = device_get_softc(dev);
  121 
  122         if (bus_alloc_resources(dev, src_spec, sc->res)) {
  123                 device_printf(dev, "could not allocate resources\n");
  124                 return (ENXIO);
  125         }
  126 
  127         /* Memory interface */
  128         sc->bst = rman_get_bustag(sc->res[0]);
  129         sc->bsh = rman_get_bushandle(sc->res[0]);
  130 
  131         src_sc = sc;
  132 
  133         return (0);
  134 }
  135 
  136 static device_method_t src_methods[] = {
  137         DEVMETHOD(device_probe,         src_probe),
  138         DEVMETHOD(device_attach,        src_attach),
  139         { 0, 0 }
  140 };
  141 
  142 static driver_t src_driver = {
  143         "src",
  144         src_methods,
  145         sizeof(struct src_softc),
  146 };
  147 
  148 static devclass_t src_devclass;
  149 
  150 DRIVER_MODULE(src, simplebus, src_driver, src_devclass, 0, 0);

Cache object: ecf3a7d44de7697efb5910bfd9996607


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