Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/misc/atkbdc_layer/atkbdc_isa.c
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1 /*- 2 * (MPSAFE) 3 * 4 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer as 12 * the first lines of this file unmodified. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/isa/atkbdc_isa.c,v 1.14.2.1 2000/03/31 12:52:05 yokota Exp $ 29 */ 30 31 #include "opt_kbd.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/malloc.h> 38 #include <sys/rman.h> 39 #include <sys/thread.h> 40 41 #include <dev/misc/kbd/atkbdcreg.h> 42 43 #include <bus/isa/isareg.h> 44 #include <bus/isa/isavar.h> 45 46 #if 0 47 #define lwkt_gettoken(x) 48 #define lwkt_reltoken(x) 49 #endif 50 51 MALLOC_DEFINE(M_ATKBDDEV, "atkbddev", "AT Keyboard device"); 52 53 /* children */ 54 typedef struct atkbdc_device { 55 int flags; /* configuration flags */ 56 int irq; /* ISA IRQ mask */ 57 u_int32_t vendorid; 58 u_int32_t serial; 59 u_int32_t logicalid; 60 u_int32_t compatid; 61 } atkbdc_device_t; 62 63 /* kbdc */ 64 devclass_t atkbdc_devclass; 65 66 static int atkbdc_probe(device_t dev); 67 static int atkbdc_attach(device_t dev); 68 static int atkbdc_print_child(device_t bus, device_t dev); 69 static int atkbdc_read_ivar(device_t bus, device_t dev, int index, 70 u_long *val); 71 static int atkbdc_write_ivar(device_t bus, device_t dev, int index, 72 u_long val); 73 74 static device_method_t atkbdc_methods[] = { 75 DEVMETHOD(device_probe, atkbdc_probe), 76 DEVMETHOD(device_attach, atkbdc_attach), 77 DEVMETHOD(device_suspend, bus_generic_suspend), 78 DEVMETHOD(device_resume, bus_generic_resume), 79 80 DEVMETHOD(bus_print_child, atkbdc_print_child), 81 DEVMETHOD(bus_read_ivar, atkbdc_read_ivar), 82 DEVMETHOD(bus_write_ivar, atkbdc_write_ivar), 83 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 84 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 85 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 86 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 87 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 88 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 89 90 DEVMETHOD_END 91 }; 92 93 static driver_t atkbdc_driver = { 94 ATKBDC_DRIVER_NAME, 95 atkbdc_methods, 96 sizeof(atkbdc_softc_t *), 97 }; 98 99 static struct isa_pnp_id atkbdc_ids[] = { 100 { 0x0303d041, "Keyboard controller (i8042)" }, /* PNP0303 */ 101 { 0 } 102 }; 103 104 static int 105 atkbdc_probe(device_t dev) 106 { 107 struct resource *port0; 108 struct resource *port1; 109 int error; 110 int rid; 111 #if defined(__i386__) || defined(__x86_64__) 112 bus_space_tag_t tag; 113 bus_space_handle_t ioh1; 114 volatile int i; 115 #endif 116 117 /* check PnP IDs */ 118 if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO) 119 return ENXIO; 120 121 device_set_desc(dev, "Keyboard controller (i8042)"); 122 123 rid = 0; 124 port0 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, 125 RF_ACTIVE); 126 if (port0 == NULL) 127 return ENXIO; 128 /* XXX */ 129 if (bus_get_resource_start(dev, SYS_RES_IOPORT, 1) <= 0) { 130 bus_set_resource(dev, SYS_RES_IOPORT, 1, 131 rman_get_start(port0) + KBD_STATUS_PORT, 1, -1); 132 } 133 rid = 1; 134 port1 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, 135 RF_ACTIVE); 136 if (port1 == NULL) { 137 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 138 return ENXIO; 139 } 140 141 #if defined(__i386__) || defined(__x86_64__) 142 /* 143 * Check if we really have AT keyboard controller. Poll status 144 * register until we get "all clear" indication. If no such 145 * indication comes, it probably means that there is no AT 146 * keyboard controller present. Give up in such case. Check relies 147 * on the fact that reading from non-existing in/out port returns 148 * 0xff on i386. May or may not be true on other platforms. 149 */ 150 tag = rman_get_bustag(port0); 151 ioh1 = rman_get_bushandle(port1); 152 for (i = 65536; i != 0; --i) { 153 if ((bus_space_read_1(tag, ioh1, 0) & 0x2) == 0) 154 break; 155 DELAY(16); 156 } 157 if (i == 0) { 158 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 159 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1); 160 return ENXIO; 161 } 162 #endif 163 164 error = atkbdc_probe_unit(device_get_unit(dev), port0, port1); 165 166 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 167 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1); 168 169 return error; 170 } 171 172 static void 173 atkbdc_add_device(device_t dev, const char *name, int unit) 174 { 175 atkbdc_device_t *kdev; 176 device_t child; 177 int t; 178 179 if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0) 180 return; 181 182 kdev = kmalloc(sizeof(struct atkbdc_device), M_ATKBDDEV, 183 M_WAITOK | M_ZERO); 184 185 if (resource_int_value(name, unit, "irq", &t) == 0) 186 kdev->irq = t; 187 else 188 kdev->irq = -1; 189 190 if (resource_int_value(name, unit, "flags", &t) == 0) 191 kdev->flags = t; 192 else 193 kdev->flags = 0; 194 195 child = device_add_child(dev, name, unit); 196 device_set_ivars(child, kdev); 197 } 198 199 static int 200 atkbdc_attach(device_t dev) 201 { 202 atkbdc_softc_t *sc; 203 int unit; 204 int error; 205 int rid; 206 int i; 207 208 lwkt_gettoken(&tty_token); 209 unit = device_get_unit(dev); 210 sc = *(atkbdc_softc_t **)device_get_softc(dev); 211 if (sc == NULL) { 212 /* 213 * We have to maintain two copies of the kbdc_softc struct, 214 * as the low-level console needs to have access to the 215 * keyboard controller before kbdc is probed and attached. 216 * kbdc_soft[] contains the default entry for that purpose. 217 * See atkbdc.c. XXX 218 */ 219 sc = atkbdc_get_softc(unit); 220 if (sc == NULL) { 221 lwkt_reltoken(&tty_token); 222 return ENOMEM; 223 } 224 } 225 226 rid = 0; 227 sc->port0 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, 228 RF_ACTIVE); 229 if (sc->port0 == NULL) { 230 lwkt_reltoken(&tty_token); 231 return ENXIO; 232 } 233 rid = 1; 234 sc->port1 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, 235 RF_ACTIVE); 236 if (sc->port1 == NULL) { 237 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0); 238 lwkt_reltoken(&tty_token); 239 return ENXIO; 240 } 241 242 error = atkbdc_attach_unit(unit, sc, sc->port0, sc->port1); 243 if (error) { 244 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0); 245 bus_release_resource(dev, SYS_RES_IOPORT, 1, sc->port1); 246 lwkt_reltoken(&tty_token); 247 return error; 248 } 249 *(atkbdc_softc_t **)device_get_softc(dev) = sc; 250 251 /* 252 * Add all devices configured to be attached to atkbdc0. 253 */ 254 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 255 i != -1; 256 i = resource_query_string(i, "at", device_get_nameunit(dev))) { 257 atkbdc_add_device(dev, resource_query_name(i), 258 resource_query_unit(i)); 259 } 260 261 /* 262 * and atkbdc? 263 */ 264 for (i = resource_query_string(-1, "at", device_get_name(dev)); 265 i != -1; 266 i = resource_query_string(i, "at", device_get_name(dev))) { 267 atkbdc_add_device(dev, resource_query_name(i), 268 resource_query_unit(i)); 269 } 270 271 bus_generic_attach(dev); 272 273 lwkt_reltoken(&tty_token); 274 return 0; 275 } 276 277 static int 278 atkbdc_print_child(device_t bus, device_t dev) 279 { 280 atkbdc_device_t *kbdcdev; 281 int retval = 0; 282 283 kbdcdev = (atkbdc_device_t *)device_get_ivars(dev); 284 285 retval += bus_print_child_header(bus, dev); 286 if (kbdcdev->flags != 0) 287 retval += kprintf(" flags 0x%x", kbdcdev->flags); 288 if (kbdcdev->irq != -1) 289 retval += kprintf(" irq %d", kbdcdev->irq); 290 retval += bus_print_child_footer(bus, dev); 291 292 return (retval); 293 } 294 295 static int 296 atkbdc_read_ivar(device_t bus, device_t dev, int index, u_long *val) 297 { 298 atkbdc_device_t *ivar; 299 300 lwkt_gettoken(&tty_token); 301 ivar = (atkbdc_device_t *)device_get_ivars(dev); 302 switch (index) { 303 case KBDC_IVAR_IRQ: 304 *val = (u_long)ivar->irq; 305 break; 306 case KBDC_IVAR_FLAGS: 307 *val = (u_long)ivar->flags; 308 break; 309 case KBDC_IVAR_VENDORID: 310 *val = (u_long)ivar->vendorid; 311 break; 312 case KBDC_IVAR_SERIAL: 313 *val = (u_long)ivar->serial; 314 break; 315 case KBDC_IVAR_LOGICALID: 316 *val = (u_long)ivar->logicalid; 317 break; 318 case KBDC_IVAR_COMPATID: 319 *val = (u_long)ivar->compatid; 320 break; 321 default: 322 lwkt_reltoken(&tty_token); 323 return ENOENT; 324 } 325 326 lwkt_reltoken(&tty_token); 327 return 0; 328 } 329 330 static int 331 atkbdc_write_ivar(device_t bus, device_t dev, int index, u_long val) 332 { 333 atkbdc_device_t *ivar; 334 335 lwkt_gettoken(&tty_token); 336 ivar = (atkbdc_device_t *)device_get_ivars(dev); 337 switch (index) { 338 case KBDC_IVAR_IRQ: 339 ivar->irq = (int)val; 340 break; 341 case KBDC_IVAR_FLAGS: 342 ivar->flags = (int)val; 343 break; 344 case KBDC_IVAR_VENDORID: 345 ivar->vendorid = (u_int32_t)val; 346 break; 347 case KBDC_IVAR_SERIAL: 348 ivar->serial = (u_int32_t)val; 349 break; 350 case KBDC_IVAR_LOGICALID: 351 ivar->logicalid = (u_int32_t)val; 352 break; 353 case KBDC_IVAR_COMPATID: 354 ivar->compatid = (u_int32_t)val; 355 break; 356 default: 357 lwkt_reltoken(&tty_token); 358 return ENOENT; 359 } 360 361 lwkt_reltoken(&tty_token); 362 return 0; 363 } 364 365 DRIVER_MODULE(atkbdc, isa, atkbdc_driver, atkbdc_devclass, NULL, NULL); 366 DRIVER_MODULE(atkbdc, acpi, atkbdc_driver, atkbdc_devclass, NULL, NULL);
Cache object: 45d3334365b9c4bf7a0123f7d0ab3bda
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