sys/dev/ichiic/ig4_acpi.c

   1 /*-
   2  * Copyright (c) 2016 Oleksandr Tymoshenko <gonzo@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include "opt_acpi.h"
  31
  32 #include <sys/param.h>
  33 #include <sys/bus.h>
  34 #include <sys/kernel.h>
  35 #include <sys/module.h>
  36 #include <sys/proc.h>
  37 #include <sys/rman.h>
  38
  39 #include <machine/bus.h>
  40 #include <machine/resource.h>
  41
  42 #include <contrib/dev/acpica/include/acpi.h>
  43 #include <contrib/dev/acpica/include/accommon.h>
  44
  45 #include <dev/acpica/acpivar.h>
  46 #include <dev/iicbus/iiconf.h>
  47
  48 #include <dev/ichiic/ig4_reg.h>
  49 #include <dev/ichiic/ig4_var.h>
  50
  51 static int      ig4iic_acpi_probe(device_t dev);
  52 static int      ig4iic_acpi_attach(device_t dev);
  53 static int      ig4iic_acpi_detach(device_t dev);
  54
  55 static char *ig4iic_ids[] = {
  56         "INT33C2",
  57         "INT33C3",
  58         "INT3432",
  59         "INT3433",
  60         "80860F41",
  61         "808622C1",
  62         "AMDI0510",
  63         "APMC0D0F",
  64         NULL
  65 };
  66
  67 static int
  68 ig4iic_acpi_probe(device_t dev)
  69 {
  70
  71         if (acpi_disabled("ig4iic") ||
  72             ACPI_ID_PROBE(device_get_parent(dev), dev, ig4iic_ids) == NULL)
  73         return (ENXIO);
  74
  75         device_set_desc(dev, "Designware I2C Controller");
  76         return (0);
  77 }
  78
  79 static int
  80 ig4iic_acpi_attach(device_t dev)
  81 {
  82         ig4iic_softc_t  *sc;
  83         int error;
  84
  85         sc = device_get_softc(dev);
  86
  87         sc->dev = dev;
  88         /* All the HIDs matched are Atom SOCs. */
  89         sc->version = IG4_ATOM;
  90         sc->regs_rid = 0;
  91         sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
  92                                           &sc->regs_rid, RF_ACTIVE);
  93         if (sc->regs_res == NULL) {
  94                 device_printf(dev, "unable to map registers\n");
  95                 ig4iic_acpi_detach(dev);
  96                 return (ENXIO);
  97         }
  98         sc->intr_rid = 0;
  99         sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
 100                                           &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);
 101         if (sc->intr_res == NULL) {
 102                 device_printf(dev, "unable to map interrupt\n");
 103                 ig4iic_acpi_detach(dev);
 104                 return (ENXIO);
 105         }
 106         sc->platform_attached = 1;
 107
 108         error = ig4iic_attach(sc);
 109         if (error)
 110                 ig4iic_acpi_detach(dev);
 111
 112         return (error);
 113 }
 114
 115 static int
 116 ig4iic_acpi_detach(device_t dev)
 117 {
 118         ig4iic_softc_t *sc = device_get_softc(dev);
 119         int error;
 120
 121         if (sc->platform_attached) {
 122                 error = ig4iic_detach(sc);
 123                 if (error)
 124                         return (error);
 125                 sc->platform_attached = 0;
 126         }
 127
 128         if (sc->intr_res) {
 129                 bus_release_resource(dev, SYS_RES_IRQ,
 130                                      sc->intr_rid, sc->intr_res);
 131                 sc->intr_res = NULL;
 132         }
 133         if (sc->regs_res) {
 134                 bus_release_resource(dev, SYS_RES_MEMORY,
 135                                      sc->regs_rid, sc->regs_res);
 136                 sc->regs_res = NULL;
 137         }
 138
 139         return (0);
 140 }
 141
 142 static device_method_t ig4iic_acpi_methods[] = {
 143         /* Device interface */
 144         DEVMETHOD(device_probe, ig4iic_acpi_probe),
 145         DEVMETHOD(device_attach, ig4iic_acpi_attach),
 146         DEVMETHOD(device_detach, ig4iic_acpi_detach),
 147
 148         /* iicbus interface */
 149         DEVMETHOD(iicbus_transfer, ig4iic_transfer),
 150         DEVMETHOD(iicbus_reset, ig4iic_reset),
 151         DEVMETHOD(iicbus_callback, iicbus_null_callback),
 152
 153         DEVMETHOD_END
 154 };
 155
 156 static driver_t ig4iic_acpi_driver = {
 157         "ig4iic_acpi",
 158         ig4iic_acpi_methods,
 159         sizeof(struct ig4iic_softc),
 160 };
 161
 162 static devclass_t ig4iic_acpi_devclass;
 163 DRIVER_MODULE(ig4iic_acpi, acpi, ig4iic_acpi_driver, ig4iic_acpi_devclass, 0, 0);
 164
 165 MODULE_DEPEND(ig4iic_acpi, acpi, 1, 1, 1);
 166 MODULE_DEPEND(ig4iic_acpi, pci, 1, 1, 1);
 167 MODULE_DEPEND(ig4iic_acpi, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
 168 MODULE_VERSION(ig4iic_acpi, 1);