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 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_kbd.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/malloc.h> 40 #include <machine/resource.h> 41 #include <sys/rman.h> 42 #include <machine/bus.h> 43 44 #include <dev/atkbdc/atkbdc_subr.h> 45 #include <dev/atkbdc/atkbdcreg.h> 46 47 #include <isa/isareg.h> 48 #include <isa/isavar.h> 49 50 static int atkbdc_isa_probe(device_t dev); 51 static int atkbdc_isa_attach(device_t dev); 52 static device_t atkbdc_isa_add_child(device_t bus, u_int order, const char *name, 53 int unit); 54 static struct resource *atkbdc_isa_alloc_resource(device_t dev, device_t child, 55 int type, int *rid, rman_res_t start, rman_res_t end, 56 rman_res_t count, u_int flags); 57 static int atkbdc_isa_release_resource(device_t dev, device_t child, 58 int type, int rid, struct resource *r); 59 60 static device_method_t atkbdc_isa_methods[] = { 61 DEVMETHOD(device_probe, atkbdc_isa_probe), 62 DEVMETHOD(device_attach, atkbdc_isa_attach), 63 DEVMETHOD(device_suspend, bus_generic_suspend), 64 DEVMETHOD(device_resume, bus_generic_resume), 65 66 DEVMETHOD(bus_add_child, atkbdc_isa_add_child), 67 DEVMETHOD(bus_print_child, atkbdc_print_child), 68 DEVMETHOD(bus_read_ivar, atkbdc_read_ivar), 69 DEVMETHOD(bus_write_ivar, atkbdc_write_ivar), 70 DEVMETHOD(bus_get_resource_list,atkbdc_get_resource_list), 71 DEVMETHOD(bus_alloc_resource, atkbdc_isa_alloc_resource), 72 DEVMETHOD(bus_release_resource, atkbdc_isa_release_resource), 73 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 74 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 75 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 76 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 77 DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource), 78 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 79 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 80 { 0, 0 } 81 }; 82 83 static driver_t atkbdc_isa_driver = { 84 ATKBDC_DRIVER_NAME, 85 atkbdc_isa_methods, 86 sizeof(atkbdc_softc_t *), 87 }; 88 89 static struct isa_pnp_id atkbdc_ids[] = { 90 { 0x0303d041, "Keyboard controller (i8042)" }, /* PNP0303 */ 91 { 0x0b03d041, "Keyboard controller (i8042)" }, /* PNP030B */ 92 { 0x2003d041, "Keyboard controller (i8042)" }, /* PNP0320 */ 93 { 0 } 94 }; 95 96 static int 97 atkbdc_isa_probe(device_t dev) 98 { 99 struct resource *port0; 100 struct resource *port1; 101 rman_res_t start; 102 rman_res_t count; 103 int error; 104 int rid; 105 #if defined(__i386__) || defined(__amd64__) 106 bus_space_tag_t tag; 107 bus_space_handle_t ioh1; 108 volatile int i; 109 register_t flags; 110 #endif 111 112 /* check PnP IDs */ 113 if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO) 114 return ENXIO; 115 116 device_set_desc(dev, "Keyboard controller (i8042)"); 117 118 /* 119 * Adjust I/O port resources. 120 * The AT keyboard controller uses two ports (a command/data port 121 * 0x60 and a status port 0x64), which may be given to us in 122 * one resource (0x60 through 0x64) or as two separate resources 123 * (0x60 and 0x64). Some brain-damaged ACPI BIOS has reversed 124 * command/data port and status port. Furthermore, /boot/device.hints 125 * may contain just one port, 0x60. We shall adjust resource settings 126 * so that these two ports are available as two separate resources 127 * in correct order. 128 */ 129 device_quiet(dev); 130 rid = 0; 131 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0) 132 return ENXIO; 133 if (start == IO_KBD + KBD_STATUS_PORT) { 134 start = IO_KBD; 135 count++; 136 } 137 if (count > 1) /* adjust the count and/or start port */ 138 bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1); 139 port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); 140 if (port0 == NULL) 141 return ENXIO; 142 rid = 1; 143 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, NULL, NULL) != 0) 144 bus_set_resource(dev, SYS_RES_IOPORT, 1, 145 start + KBD_STATUS_PORT, 1); 146 port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); 147 if (port1 == NULL) { 148 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 149 return ENXIO; 150 } 151 152 #if defined(__i386__) || defined(__amd64__) 153 /* 154 * Check if we really have AT keyboard controller. Poll status 155 * register until we get "all clear" indication. If no such 156 * indication comes, it probably means that there is no AT 157 * keyboard controller present. Give up in such case. Check relies 158 * on the fact that reading from non-existing in/out port returns 159 * 0xff on i386. May or may not be true on other platforms. 160 */ 161 tag = rman_get_bustag(port0); 162 ioh1 = rman_get_bushandle(port1); 163 flags = intr_disable(); 164 for (i = 0; i != 65535; i++) { 165 if ((bus_space_read_1(tag, ioh1, 0) & 0x2) == 0) 166 break; 167 } 168 intr_restore(flags); 169 if (i == 65535) { 170 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 171 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1); 172 if (bootverbose) 173 device_printf(dev, "AT keyboard controller not found\n"); 174 return ENXIO; 175 } 176 #endif 177 178 device_verbose(dev); 179 180 error = atkbdc_probe_unit(device_get_unit(dev), port0, port1); 181 182 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0); 183 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1); 184 185 return error; 186 } 187 188 static int 189 atkbdc_isa_attach(device_t dev) 190 { 191 atkbdc_softc_t *sc; 192 int unit; 193 int error; 194 int rid; 195 196 unit = device_get_unit(dev); 197 sc = *(atkbdc_softc_t **)device_get_softc(dev); 198 if (sc == NULL) { 199 /* 200 * We have to maintain two copies of the kbdc_softc struct, 201 * as the low-level console needs to have access to the 202 * keyboard controller before kbdc is probed and attached. 203 * kbdc_soft[] contains the default entry for that purpose. 204 * See atkbdc.c. XXX 205 */ 206 sc = atkbdc_get_softc(unit); 207 if (sc == NULL) 208 return ENOMEM; 209 } 210 211 rid = 0; 212 sc->retry = 5000; 213 sc->port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 214 RF_ACTIVE); 215 if (sc->port0 == NULL) 216 return ENXIO; 217 rid = 1; 218 sc->port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 219 RF_ACTIVE); 220 if (sc->port1 == NULL) { 221 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0); 222 return ENXIO; 223 } 224 225 /* 226 * If the device is not created by the PnP BIOS or ACPI, then 227 * the hint for the IRQ is on the child atkbd device, not the 228 * keyboard controller, so this can fail. 229 */ 230 rid = 0; 231 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 232 233 error = atkbdc_attach_unit(unit, sc, sc->port0, sc->port1); 234 if (error) { 235 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0); 236 bus_release_resource(dev, SYS_RES_IOPORT, 1, sc->port1); 237 if (sc->irq != NULL) 238 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq); 239 return error; 240 } 241 *(atkbdc_softc_t **)device_get_softc(dev) = sc; 242 243 bus_generic_probe(dev); 244 bus_generic_attach(dev); 245 246 return 0; 247 } 248 249 static device_t 250 atkbdc_isa_add_child(device_t bus, u_int order, const char *name, int unit) 251 { 252 atkbdc_device_t *ivar; 253 atkbdc_softc_t *sc; 254 device_t child; 255 int t; 256 257 sc = *(atkbdc_softc_t **)device_get_softc(bus); 258 ivar = malloc(sizeof(struct atkbdc_device), M_ATKBDDEV, 259 M_NOWAIT | M_ZERO); 260 if (!ivar) 261 return NULL; 262 263 child = device_add_child_ordered(bus, order, name, unit); 264 if (child == NULL) { 265 free(ivar, M_ATKBDDEV); 266 return child; 267 } 268 269 resource_list_init(&ivar->resources); 270 ivar->rid = order; 271 272 /* 273 * If the device is not created by the PnP BIOS or ACPI, refer 274 * to device hints for IRQ. We always populate the resource 275 * list entry so we can use a standard bus_get_resource() 276 * method. 277 */ 278 if (order == KBDC_RID_KBD) { 279 if (sc->irq == NULL) { 280 if (resource_int_value(name, unit, "irq", &t) != 0) 281 t = -1; 282 } else 283 t = rman_get_start(sc->irq); 284 if (t > 0) 285 resource_list_add(&ivar->resources, SYS_RES_IRQ, 286 ivar->rid, t, t, 1); 287 } 288 289 if (resource_disabled(name, unit)) 290 device_disable(child); 291 292 device_set_ivars(child, ivar); 293 294 return child; 295 } 296 297 struct resource * 298 atkbdc_isa_alloc_resource(device_t dev, device_t child, int type, int *rid, 299 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 300 { 301 atkbdc_softc_t *sc; 302 303 sc = *(atkbdc_softc_t **)device_get_softc(dev); 304 if (type == SYS_RES_IRQ && *rid == KBDC_RID_KBD && sc->irq != NULL) 305 return (sc->irq); 306 return (bus_generic_rl_alloc_resource(dev, child, type, rid, start, 307 end, count, flags)); 308 } 309 310 static int 311 atkbdc_isa_release_resource(device_t dev, device_t child, int type, int rid, 312 struct resource *r) 313 { 314 atkbdc_softc_t *sc; 315 316 sc = *(atkbdc_softc_t **)device_get_softc(dev); 317 if (type == SYS_RES_IRQ && rid == KBDC_RID_KBD && r == sc->irq) 318 return (0); 319 return (bus_generic_rl_release_resource(dev, child, type, rid, r)); 320 } 321 322 DRIVER_MODULE(atkbdc, isa, atkbdc_isa_driver, 0, 0); 323 DRIVER_MODULE(atkbdc, acpi, atkbdc_isa_driver, 0, 0); 324 ISA_PNP_INFO(atkbdc_ids);
Cache object: b40fd79003c76fb6b4de189416cc19fc
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