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         "AMDI0010",
  64         "APMC0D0F",
  65         NULL
  66 };
  67
  68 static int
  69 ig4iic_acpi_probe(device_t dev)
  70 {
  71         ig4iic_softc_t *sc;
  72         char *hid;
  73
  74         sc = device_get_softc(dev);
  75
  76         if (acpi_disabled("ig4iic"))
  77                 return (ENXIO);
  78
  79         hid = ACPI_ID_PROBE(device_get_parent(dev), dev, ig4iic_ids);
  80         if (hid == NULL)
  81                 return (ENXIO);
  82
  83         if (strcmp("AMDI0010", hid) == 0)
  84                 sc->access_intr_mask = 1;
  85
  86         device_set_desc(dev, "Designware I2C Controller");
  87         return (0);
  88 }
  89
  90 static int
  91 ig4iic_acpi_attach(device_t dev)
  92 {
  93         ig4iic_softc_t  *sc;
  94         int error;
  95
  96         sc = device_get_softc(dev);
  97
  98         sc->dev = dev;
  99         /* All the HIDs matched are Atom SOCs. */
 100         sc->version = IG4_ATOM;
 101         sc->regs_rid = 0;
 102         sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
 103                                           &sc->regs_rid, RF_ACTIVE);
 104         if (sc->regs_res == NULL) {
 105                 device_printf(dev, "unable to map registers\n");
 106                 ig4iic_acpi_detach(dev);
 107                 return (ENXIO);
 108         }
 109         sc->intr_rid = 0;
 110         sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
 111                                           &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);
 112         if (sc->intr_res == NULL) {
 113                 device_printf(dev, "unable to map interrupt\n");
 114                 ig4iic_acpi_detach(dev);
 115                 return (ENXIO);
 116         }
 117         sc->platform_attached = 1;
 118
 119         error = ig4iic_attach(sc);
 120         if (error)
 121                 ig4iic_acpi_detach(dev);
 122
 123         return (error);
 124 }
 125
 126 static int
 127 ig4iic_acpi_detach(device_t dev)
 128 {
 129         ig4iic_softc_t *sc = device_get_softc(dev);
 130         int error;
 131
 132         if (sc->platform_attached) {
 133                 error = ig4iic_detach(sc);
 134                 if (error)
 135                         return (error);
 136                 sc->platform_attached = 0;
 137         }
 138
 139         if (sc->intr_res) {
 140                 bus_release_resource(dev, SYS_RES_IRQ,
 141                                      sc->intr_rid, sc->intr_res);
 142                 sc->intr_res = NULL;
 143         }
 144         if (sc->regs_res) {
 145                 bus_release_resource(dev, SYS_RES_MEMORY,
 146                                      sc->regs_rid, sc->regs_res);
 147                 sc->regs_res = NULL;
 148         }
 149
 150         return (0);
 151 }
 152
 153 static device_method_t ig4iic_acpi_methods[] = {
 154         /* Device interface */
 155         DEVMETHOD(device_probe, ig4iic_acpi_probe),
 156         DEVMETHOD(device_attach, ig4iic_acpi_attach),
 157         DEVMETHOD(device_detach, ig4iic_acpi_detach),
 158
 159         /* iicbus interface */
 160         DEVMETHOD(iicbus_transfer, ig4iic_transfer),
 161         DEVMETHOD(iicbus_reset, ig4iic_reset),
 162         DEVMETHOD(iicbus_callback, iicbus_null_callback),
 163
 164         DEVMETHOD_END
 165 };
 166
 167 static driver_t ig4iic_acpi_driver = {
 168         "ig4iic_acpi",
 169         ig4iic_acpi_methods,
 170         sizeof(struct ig4iic_softc),
 171 };
 172
 173 static devclass_t ig4iic_acpi_devclass;
 174 DRIVER_MODULE(ig4iic_acpi, acpi, ig4iic_acpi_driver, ig4iic_acpi_devclass, 0, 0);
 175
 176 MODULE_DEPEND(ig4iic_acpi, acpi, 1, 1, 1);
 177 MODULE_DEPEND(ig4iic_acpi, pci, 1, 1, 1);
 178 MODULE_DEPEND(ig4iic_acpi, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
 179 MODULE_VERSION(ig4iic_acpi, 1);