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 #include "opt_acpi.h" 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/proc.h> 35 #include <sys/rman.h> 36 37 #include <machine/bus.h> 38 #include <machine/resource.h> 39 40 #include <contrib/dev/acpica/include/acpi.h> 41 #include <contrib/dev/acpica/include/accommon.h> 42 43 #include <dev/acpica/acpivar.h> 44 #include <dev/iicbus/iiconf.h> 45 46 #include <dev/ichiic/ig4_reg.h> 47 #include <dev/ichiic/ig4_var.h> 48 49 static int ig4iic_acpi_probe(device_t dev); 50 static int ig4iic_acpi_attach(device_t dev); 51 static int ig4iic_acpi_detach(device_t dev); 52 53 static char *ig4iic_ids[] = { 54 "INT33C2", 55 "INT33C3", 56 "INT3432", 57 "INT3433", 58 "INT3446", 59 "80860F41", 60 "808622C1", 61 "AMDI0510", 62 "AMDI0010", 63 "AMD0010", 64 "APMC0D0F", 65 NULL 66 }; 67 68 static int 69 ig4iic_acpi_probe(device_t dev) 70 { 71 int rv; 72 73 if (acpi_disabled("ig4iic")) 74 return (ENXIO); 75 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, ig4iic_ids, NULL); 76 if (rv > 0) 77 return (rv); 78 79 device_set_desc(dev, "Designware I2C Controller"); 80 return (rv); 81 } 82 83 static int 84 ig4iic_acpi_attach(device_t dev) 85 { 86 ig4iic_softc_t *sc; 87 char *str; 88 int error; 89 90 sc = device_get_softc(dev); 91 92 sc->dev = dev; 93 error = ACPI_ID_PROBE(device_get_parent(dev), dev, ig4iic_ids, &str); 94 if (error > 0) 95 return (error); 96 if (strcmp(str, "APMC0D0F") == 0) { 97 sc->version = IG4_EMAG; 98 } else if (strcmp(str, "INT33C2") == 0 || strcmp(str, "INT33C3") == 0 || 99 strcmp(str, "INT3432") == 0 || strcmp(str, "INT3433") == 0) { 100 /* Lynx Point-LP / Wildcat Point-LP LPSS in ACPI mode. */ 101 sc->version = IG4_HASWELL; 102 } else { 103 /* All the other HIDs matched are Atom SOCs. */ 104 sc->version = IG4_ATOM; 105 } 106 /* 107 * Firmware may leave LPSS functions in D3 (e.g. Dell XPS 13 9343): 108 * the registers then read as all-ones and attach fails. Run _PS0. 109 */ 110 acpi_set_powerstate(dev, ACPI_STATE_D0); 111 112 sc->regs_rid = 0; 113 sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 114 &sc->regs_rid, RF_ACTIVE); 115 if (sc->regs_res == NULL) { 116 device_printf(dev, "unable to map registers\n"); 117 ig4iic_acpi_detach(dev); 118 return (ENXIO); 119 } 120 sc->intr_rid = 0; 121 sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 122 &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE); 123 if (sc->intr_res == NULL) { 124 device_printf(dev, "unable to map interrupt\n"); 125 ig4iic_acpi_detach(dev); 126 return (ENXIO); 127 } 128 sc->platform_attached = true; 129 130 error = ig4iic_attach(sc); 131 if (error) 132 ig4iic_acpi_detach(dev); 133 134 return (error); 135 } 136 137 static int 138 ig4iic_acpi_detach(device_t dev) 139 { 140 ig4iic_softc_t *sc = device_get_softc(dev); 141 int error; 142 143 if (sc->platform_attached) { 144 error = ig4iic_detach(sc); 145 if (error) 146 return (error); 147 sc->platform_attached = false; 148 } 149 150 if (sc->intr_res) { 151 bus_release_resource(dev, SYS_RES_IRQ, 152 sc->intr_rid, sc->intr_res); 153 sc->intr_res = NULL; 154 } 155 if (sc->regs_res) { 156 bus_release_resource(dev, SYS_RES_MEMORY, 157 sc->regs_rid, sc->regs_res); 158 sc->regs_res = NULL; 159 } 160 161 return (0); 162 } 163 164 static int 165 ig4iic_acpi_suspend(device_t dev) 166 { 167 ig4iic_softc_t *sc = device_get_softc(dev); 168 169 return (ig4iic_suspend(sc)); 170 } 171 172 static int 173 ig4iic_acpi_resume(device_t dev) 174 { 175 ig4iic_softc_t *sc = device_get_softc(dev); 176 177 return (ig4iic_resume(sc)); 178 } 179 180 static device_method_t ig4iic_acpi_methods[] = { 181 /* Device interface */ 182 DEVMETHOD(device_probe, ig4iic_acpi_probe), 183 DEVMETHOD(device_attach, ig4iic_acpi_attach), 184 DEVMETHOD(device_detach, ig4iic_acpi_detach), 185 DEVMETHOD(device_suspend, ig4iic_acpi_suspend), 186 DEVMETHOD(device_resume, ig4iic_acpi_resume), 187 188 /* Bus interface */ 189 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 190 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 191 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 192 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 193 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 194 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 195 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 196 197 /* iicbus interface */ 198 DEVMETHOD(iicbus_transfer, ig4iic_transfer), 199 DEVMETHOD(iicbus_reset, ig4iic_reset), 200 DEVMETHOD(iicbus_callback, ig4iic_callback), 201 202 DEVMETHOD_END 203 }; 204 205 static driver_t ig4iic_acpi_driver = { 206 "ig4iic", 207 ig4iic_acpi_methods, 208 sizeof(struct ig4iic_softc), 209 }; 210 211 DRIVER_MODULE_ORDERED(ig4iic, acpi, ig4iic_acpi_driver, 0, 0, SI_ORDER_ANY); 212 MODULE_DEPEND(ig4iic, acpi, 1, 1, 1); 213 ACPI_PNP_INFO(ig4iic_ids); 214