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         sc->regs_rid = 0;
  89         sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
  90                                           &sc->regs_rid, RF_ACTIVE);
  91         if (sc->regs_res == NULL) {
  92                 device_printf(dev, "unable to map registers\n");
  93                 ig4iic_acpi_detach(dev);
  94                 return (ENXIO);
  95         }
  96         sc->intr_rid = 0;
  97         sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
  98                                           &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);
  99         if (sc->intr_res == NULL) {
 100                 device_printf(dev, "unable to map interrupt\n");
 101                 ig4iic_acpi_detach(dev);
 102                 return (ENXIO);
 103         }
 104         sc->platform_attached = 1;
 105
 106         error = ig4iic_attach(sc);
 107         if (error)
 108                 ig4iic_acpi_detach(dev);
 109
 110         return (error);
 111 }
 112
 113 static int
 114 ig4iic_acpi_detach(device_t dev)
 115 {
 116         ig4iic_softc_t *sc = device_get_softc(dev);
 117         int error;
 118
 119         if (sc->platform_attached) {
 120                 error = ig4iic_detach(sc);
 121                 if (error)
 122                         return (error);
 123                 sc->platform_attached = 0;
 124         }
 125
 126         if (sc->intr_res) {
 127                 bus_release_resource(dev, SYS_RES_IRQ,
 128                                      sc->intr_rid, sc->intr_res);
 129                 sc->intr_res = NULL;
 130         }
 131         if (sc->regs_res) {
 132                 bus_release_resource(dev, SYS_RES_MEMORY,
 133                                      sc->regs_rid, sc->regs_res);
 134                 sc->regs_res = NULL;
 135         }
 136
 137         return (0);
 138 }
 139
 140 static device_method_t ig4iic_acpi_methods[] = {
 141         /* Device interface */
 142         DEVMETHOD(device_probe, ig4iic_acpi_probe),
 143         DEVMETHOD(device_attach, ig4iic_acpi_attach),
 144         DEVMETHOD(device_detach, ig4iic_acpi_detach),
 145
 146         /* iicbus interface */
 147         DEVMETHOD(iicbus_transfer, ig4iic_transfer),
 148         DEVMETHOD(iicbus_reset, ig4iic_reset),
 149         DEVMETHOD(iicbus_callback, iicbus_null_callback),
 150
 151         DEVMETHOD_END
 152 };
 153
 154 static driver_t ig4iic_acpi_driver = {
 155         "ig4iic_acpi",
 156         ig4iic_acpi_methods,
 157         sizeof(struct ig4iic_softc),
 158 };
 159
 160 static devclass_t ig4iic_acpi_devclass;
 161 DRIVER_MODULE(ig4iic_acpi, acpi, ig4iic_acpi_driver, ig4iic_acpi_devclass, 0, 0);
 162
 163 MODULE_DEPEND(ig4iic_acpi, acpi, 1, 1, 1);
 164 MODULE_DEPEND(ig4iic_acpi, pci, 1, 1, 1);
 165 MODULE_DEPEND(ig4iic_acpi, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
 166 MODULE_VERSION(ig4iic_acpi, 1);