Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/atkbdc/atkbdc_isa.c
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1 /*- 2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 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 as 10 * the first lines of this file unmodified. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_kbd.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/malloc.h> 38 #include <machine/resource.h> 39 #include <sys/rman.h> 40 #include <machine/bus.h> 41 42 #include <dev/atkbdc/atkbdc_subr.h> 43 #include <dev/atkbdc/atkbdcreg.h> 44 45 #include <isa/isareg.h> 46 #include <isa/isavar.h> 47 48 static int atkbdc_isa_probe(device_t dev); 49 static int atkbdc_isa_attach(device_t dev); 50 static device_t atkbdc_isa_add_child(device_t bus, u_int order, const char *name, 51 int unit); 52 53 static device_method_t atkbdc_isa_methods[] = { 54 DEVMETHOD(device_probe, atkbdc_isa_probe), 55 DEVMETHOD(device_attach, atkbdc_isa_attach), 56 DEVMETHOD(device_suspend, bus_generic_suspend), 57 DEVMETHOD(device_resume, bus_generic_resume), 58 59 DEVMETHOD(bus_add_child, atkbdc_isa_add_child), 60 DEVMETHOD(bus_print_child, atkbdc_print_child), 61 DEVMETHOD(bus_read_ivar, atkbdc_read_ivar), 62 DEVMETHOD(bus_write_ivar, atkbdc_write_ivar), 63 DEVMETHOD(bus_get_resource_list,atkbdc_get_resource_list), 64 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 65 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 66 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 67 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 68 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 69 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 70 DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource), 71 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 72 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 73 74 { 0, 0 } 75 }; 76 77 static driver_t atkbdc_isa_driver = { 78 ATKBDC_DRIVER_NAME, 79 atkbdc_isa_methods, 80 sizeof(atkbdc_softc_t *), 81 }; 82 83 static struct isa_pnp_id atkbdc_ids[] = { 84 { 0x0303d041, "Keyboard controller (i8042)" }, /* PNP0303 */ 85 { 0x2003d041, "Keyboard controller (i8042)" }, /* PNP0320 */ 86 { 0 } 87 }; 88 89 static int 90 atkbdc_isa_probe(device_t dev) 91 { 92 struct resource *port0; 93 struct resource *port1; 94 u_long start; 95 u_long count; 96 int error; 97 int rid; 98 #if defined(__i386__) 99 bus_space_tag_t tag; 100 bus_space_handle_t ioh1; 101 volatile int i; 102 register_t flags; 103 #endif 104 105 /* check PnP IDs */ 106 if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO) 107 return ENXIO; 108 109 device_set_desc(dev, "Keyboard controller (i8042)"); 110 111 /* 112 * Adjust I/O port resources. 113 * The AT keyboard controller uses two ports (a command/data port 114 * 0x60 and a status port 0x64), which may be given to us in 115 * one resource (0x60 through 0x64) or as two separate resources 116 * (0x60 and 0x64). Some brain-damaged ACPI BIOS has reversed 117 * command/data port and status port. Furthermore, /boot/device.hints 118 * may contain just one port, 0x60. We shall adjust resource settings 119 * so that these two ports are available as two separate resources 120 * in correct order. 121 */ 122 device_quiet(dev); 123 rid = 0; 124 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0) 125 return ENXIO; 126 if (start == IO_KBD + KBD_STATUS_PORT) { 127 start = IO_KBD; 128 count++; 129 } 130 if (count > 1) /* adjust the count and/or start port */ 131 bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1); 132 port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); 133 if (port0 == NULL) 134 return ENXIO; 135 rid = 1; 136 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, NULL, NULL) != 0) 137 bus_set_resource(dev, SYS_RES_IOPORT, 1, 138 start + KBD_STATUS_PORT, 1); 139 port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); 140 if (port1 == NULL) { 141 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 142 return ENXIO; 143 } 144 145 #if defined(__i386__) 146 /* 147 * Check if we really have AT keyboard controller. Poll status 148 * register until we get "all clear" indication. If no such 149 * indication comes, it probably means that there is no AT 150 * keyboard controller present. Give up in such case. Check relies 151 * on the fact that reading from non-existing in/out port returns 152 * 0xff on i386. May or may not be true on other platforms. 153 */ 154 tag = rman_get_bustag(port0); 155 ioh1 = rman_get_bushandle(port1); 156 flags = intr_disable(); 157 for (i = 0; i != 65535; i++) { 158 if ((bus_space_read_1(tag, ioh1, 0) & 0x2) == 0) 159 break; 160 } 161 intr_restore(flags); 162 if (i == 65535) { 163 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 164 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1); 165 return ENXIO; 166 } 167 #endif 168 169 device_verbose(dev); 170 171 error = atkbdc_probe_unit(device_get_unit(dev), port0, port1); 172 if (error == 0) 173 bus_generic_probe(dev); 174 175 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 176 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1); 177 178 return error; 179 } 180 181 static int 182 atkbdc_isa_attach(device_t dev) 183 { 184 atkbdc_softc_t *sc; 185 int unit; 186 int error; 187 int rid; 188 189 unit = device_get_unit(dev); 190 sc = *(atkbdc_softc_t **)device_get_softc(dev); 191 if (sc == NULL) { 192 /* 193 * We have to maintain two copies of the kbdc_softc struct, 194 * as the low-level console needs to have access to the 195 * keyboard controller before kbdc is probed and attached. 196 * kbdc_soft[] contains the default entry for that purpose. 197 * See atkbdc.c. XXX 198 */ 199 sc = atkbdc_get_softc(unit); 200 if (sc == NULL) 201 return ENOMEM; 202 } 203 204 rid = 0; 205 sc->port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 206 RF_ACTIVE); 207 if (sc->port0 == NULL) 208 return ENXIO; 209 rid = 1; 210 sc->port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 211 RF_ACTIVE); 212 if (sc->port1 == NULL) { 213 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0); 214 return ENXIO; 215 } 216 217 error = atkbdc_attach_unit(unit, sc, sc->port0, sc->port1); 218 if (error) { 219 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0); 220 bus_release_resource(dev, SYS_RES_IOPORT, 1, sc->port1); 221 return error; 222 } 223 *(atkbdc_softc_t **)device_get_softc(dev) = sc; 224 225 bus_generic_attach(dev); 226 227 return 0; 228 } 229 230 static device_t 231 atkbdc_isa_add_child(device_t bus, u_int order, const char *name, int unit) 232 { 233 atkbdc_device_t *ivar; 234 device_t child; 235 int t; 236 237 ivar = malloc(sizeof(struct atkbdc_device), M_ATKBDDEV, 238 M_NOWAIT | M_ZERO); 239 if (!ivar) 240 return NULL; 241 242 child = device_add_child_ordered(bus, order, name, unit); 243 if (child == NULL) { 244 free(ivar, M_ATKBDDEV); 245 return child; 246 } 247 248 resource_list_init(&ivar->resources); 249 ivar->rid = order; 250 251 /* 252 * If the device is not created by the PnP BIOS or ACPI, 253 * refer to device hints for IRQ. 254 */ 255 if (ISA_PNP_PROBE(device_get_parent(bus), bus, atkbdc_ids) != 0) { 256 if (resource_int_value(name, unit, "irq", &t) != 0) 257 t = -1; 258 } else { 259 t = bus_get_resource_start(bus, SYS_RES_IRQ, ivar->rid); 260 } 261 if (t > 0) 262 resource_list_add(&ivar->resources, SYS_RES_IRQ, ivar->rid, 263 t, t, 1); 264 265 if (resource_disabled(name, unit)) 266 device_disable(child); 267 268 device_set_ivars(child, ivar); 269 270 return child; 271 } 272 273 DRIVER_MODULE(atkbdc, isa, atkbdc_isa_driver, atkbdc_devclass, 0, 0); 274 DRIVER_MODULE(atkbdc, acpi, atkbdc_isa_driver, atkbdc_devclass, 0, 0);
Cache object: efb57ffd835355153969c859e7833426
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