1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2008 Nathan Whitehorn 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. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <sys/kernel.h> 37 38 #include <machine/bus.h> 39 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 43 #include "adb.h" 44 #include "adbvar.h" 45 46 static int adb_bus_probe(device_t dev); 47 static int adb_bus_attach(device_t dev); 48 static int adb_bus_detach(device_t dev); 49 static void adb_bus_enumerate(void *xdev); 50 static void adb_probe_nomatch(device_t dev, device_t child); 51 static int adb_print_child(device_t dev, device_t child); 52 53 static int adb_send_raw_packet_sync(device_t dev, uint8_t to, uint8_t command, uint8_t reg, int len, u_char *data, u_char *reply); 54 55 static char *adb_device_string[] = { 56 "HOST", "dongle", "keyboard", "mouse", "tablet", "modem", "RESERVED", "misc" 57 }; 58 59 static device_method_t adb_bus_methods[] = { 60 /* Device interface */ 61 DEVMETHOD(device_probe, adb_bus_probe), 62 DEVMETHOD(device_attach, adb_bus_attach), 63 DEVMETHOD(device_detach, adb_bus_detach), 64 DEVMETHOD(device_shutdown, bus_generic_shutdown), 65 DEVMETHOD(device_suspend, bus_generic_suspend), 66 DEVMETHOD(device_resume, bus_generic_resume), 67 68 /* Bus Interface */ 69 DEVMETHOD(bus_probe_nomatch, adb_probe_nomatch), 70 DEVMETHOD(bus_print_child, adb_print_child), 71 72 { 0, 0 }, 73 }; 74 75 driver_t adb_driver = { 76 "adb", 77 adb_bus_methods, 78 sizeof(struct adb_softc), 79 }; 80 81 static int 82 adb_bus_probe(device_t dev) 83 { 84 device_set_desc(dev, "Apple Desktop Bus"); 85 return (0); 86 } 87 88 static int 89 adb_bus_attach(device_t dev) 90 { 91 struct adb_softc *sc = device_get_softc(dev); 92 sc->enum_hook.ich_func = adb_bus_enumerate; 93 sc->enum_hook.ich_arg = dev; 94 95 /* 96 * We should wait until interrupts are enabled to try to probe 97 * the bus. Enumerating the ADB involves receiving packets, 98 * which works best with interrupts enabled. 99 */ 100 101 if (config_intrhook_establish(&sc->enum_hook) != 0) 102 return (ENOMEM); 103 104 return (0); 105 } 106 107 static void 108 adb_bus_enumerate(void *xdev) 109 { 110 device_t dev = (device_t)xdev; 111 112 struct adb_softc *sc = device_get_softc(dev); 113 uint8_t i, next_free; 114 uint16_t r3; 115 116 sc->sc_dev = dev; 117 sc->parent = device_get_parent(dev); 118 119 sc->packet_reply = 0; 120 sc->autopoll_mask = 0; 121 sc->sync_packet = 0xffff; 122 123 /* Initialize devinfo */ 124 for (i = 0; i < 16; i++) { 125 sc->devinfo[i].address = i; 126 sc->devinfo[i].default_address = 0; 127 } 128 129 /* Reset ADB bus */ 130 adb_send_raw_packet_sync(dev,0,ADB_COMMAND_BUS_RESET,0,0,NULL,NULL); 131 DELAY(1500); 132 133 /* Enumerate bus */ 134 next_free = 8; 135 136 for (i = 1; i <= 7; i++) { 137 int8_t first_relocated = -1; 138 int reply = 0; 139 140 do { 141 reply = adb_send_raw_packet_sync(dev,i, 142 ADB_COMMAND_TALK,3,0,NULL,NULL); 143 144 if (reply) { 145 /* If we got a response, relocate to next_free */ 146 r3 = sc->devinfo[i].register3; 147 r3 &= 0xf000; 148 r3 |= ((uint16_t)(next_free) & 0x000f) << 8; 149 r3 |= 0x00fe; 150 151 adb_send_raw_packet_sync(dev,i, ADB_COMMAND_LISTEN,3, 152 sizeof(uint16_t),(u_char *)(&r3),NULL); 153 154 adb_send_raw_packet_sync(dev,next_free, 155 ADB_COMMAND_TALK,3,0,NULL,NULL); 156 157 sc->devinfo[next_free].default_address = i; 158 if (first_relocated < 0) 159 first_relocated = next_free; 160 161 next_free++; 162 } else if (first_relocated > 0) { 163 /* Collisions removed, relocate first device back */ 164 165 r3 = sc->devinfo[i].register3; 166 r3 &= 0xf000; 167 r3 |= ((uint16_t)(i) & 0x000f) << 8; 168 169 adb_send_raw_packet_sync(dev,first_relocated, 170 ADB_COMMAND_LISTEN,3, 171 sizeof(uint16_t),(u_char *)(&r3),NULL); 172 adb_send_raw_packet_sync(dev,i, 173 ADB_COMMAND_TALK,3,0,NULL,NULL); 174 175 sc->devinfo[i].default_address = i; 176 sc->devinfo[(int)(first_relocated)].default_address = 0; 177 break; 178 } 179 } while (reply); 180 } 181 182 for (i = 0; i < 16; i++) { 183 if (sc->devinfo[i].default_address) { 184 sc->children[i] = device_add_child(dev, NULL, -1); 185 device_set_ivars(sc->children[i], &sc->devinfo[i]); 186 } 187 } 188 189 bus_generic_attach(dev); 190 191 config_intrhook_disestablish(&sc->enum_hook); 192 } 193 194 static int adb_bus_detach(device_t dev) 195 { 196 return (bus_generic_detach(dev)); 197 } 198 199 static void 200 adb_probe_nomatch(device_t dev, device_t child) 201 { 202 struct adb_devinfo *dinfo; 203 204 if (bootverbose) { 205 dinfo = device_get_ivars(child); 206 207 device_printf(dev,"ADB %s at device %d (no driver attached)\n", 208 adb_device_string[dinfo->default_address],dinfo->address); 209 } 210 } 211 212 u_int 213 adb_receive_raw_packet(device_t dev, u_char status, u_char command, int len, 214 u_char *data) 215 { 216 struct adb_softc *sc = device_get_softc(dev); 217 u_char addr = command >> 4; 218 219 if (len > 0 && (command & 0x0f) == ((ADB_COMMAND_TALK << 2) | 3)) { 220 memcpy(&sc->devinfo[addr].register3,data,2); 221 sc->devinfo[addr].handler_id = data[1]; 222 } 223 224 if (sc->sync_packet == command) { 225 memcpy(sc->syncreg,data,(len > 8) ? 8 : len); 226 atomic_store_rel_int(&sc->packet_reply,len + 1); 227 wakeup(sc); 228 } 229 230 if (sc->children[addr] != NULL) { 231 ADB_RECEIVE_PACKET(sc->children[addr],status, 232 (command & 0x0f) >> 2,command & 0x03,len,data); 233 } 234 235 return (0); 236 } 237 238 static int 239 adb_print_child(device_t dev, device_t child) 240 { 241 struct adb_devinfo *dinfo; 242 int retval = 0; 243 244 dinfo = device_get_ivars(child); 245 246 retval += bus_print_child_header(dev,child); 247 printf(" at device %d",dinfo->address); 248 retval += bus_print_child_footer(dev, child); 249 250 return (retval); 251 } 252 253 u_int 254 adb_send_packet(device_t dev, u_char command, u_char reg, int len, u_char *data) 255 { 256 u_char command_byte = 0; 257 struct adb_devinfo *dinfo; 258 struct adb_softc *sc; 259 260 sc = device_get_softc(device_get_parent(dev)); 261 dinfo = device_get_ivars(dev); 262 263 command_byte |= dinfo->address << 4; 264 command_byte |= command << 2; 265 command_byte |= reg; 266 267 ADB_HB_SEND_RAW_PACKET(sc->parent, command_byte, len, data, 1); 268 269 return (0); 270 } 271 272 u_int 273 adb_set_autopoll(device_t dev, u_char enable) 274 { 275 struct adb_devinfo *dinfo; 276 struct adb_softc *sc; 277 uint16_t mod = 0; 278 279 sc = device_get_softc(device_get_parent(dev)); 280 dinfo = device_get_ivars(dev); 281 282 mod = enable << dinfo->address; 283 if (enable) { 284 sc->autopoll_mask |= mod; 285 } else { 286 mod = ~mod; 287 sc->autopoll_mask &= mod; 288 } 289 290 ADB_HB_SET_AUTOPOLL_MASK(sc->parent,sc->autopoll_mask); 291 292 return (0); 293 } 294 295 uint8_t 296 adb_get_device_type(device_t dev) 297 { 298 struct adb_devinfo *dinfo; 299 300 dinfo = device_get_ivars(dev); 301 return (dinfo->default_address); 302 } 303 304 uint8_t 305 adb_get_device_handler(device_t dev) 306 { 307 struct adb_devinfo *dinfo; 308 309 dinfo = device_get_ivars(dev); 310 return (dinfo->handler_id); 311 } 312 313 static int 314 adb_send_raw_packet_sync(device_t dev, uint8_t to, uint8_t command, 315 uint8_t reg, int len, u_char *data, u_char *reply) 316 { 317 u_char command_byte = 0; 318 struct adb_softc *sc; 319 int result = -1; 320 int i = 1; 321 322 sc = device_get_softc(dev); 323 324 command_byte |= to << 4; 325 command_byte |= command << 2; 326 command_byte |= reg; 327 328 /* Wait if someone else has a synchronous request pending */ 329 while (!atomic_cmpset_int(&sc->sync_packet, 0xffff, command_byte)) 330 tsleep(sc, 0, "ADB sync", hz/10); 331 332 sc->packet_reply = 0; 333 sc->sync_packet = command_byte; 334 335 ADB_HB_SEND_RAW_PACKET(sc->parent, command_byte, len, data, 1); 336 337 while (!atomic_fetchadd_int(&sc->packet_reply,0)) { 338 /* 339 * Maybe the command got lost? Try resending and polling the 340 * controller. 341 */ 342 if (i % 40 == 0) 343 ADB_HB_SEND_RAW_PACKET(sc->parent, command_byte, 344 len, data, 1); 345 346 tsleep(sc, 0, "ADB sync", hz/10); 347 i++; 348 } 349 350 result = sc->packet_reply - 1; 351 352 if (reply != NULL && result > 0) 353 memcpy(reply,sc->syncreg,result); 354 355 /* Clear packet sync */ 356 sc->packet_reply = 0; 357 358 /* 359 * We can't match a value beyond 8 bits, so set sync_packet to 360 * 0xffff to avoid collisions. 361 */ 362 atomic_set_int(&sc->sync_packet, 0xffff); 363 364 return (result); 365 } 366 367 uint8_t 368 adb_set_device_handler(device_t dev, uint8_t newhandler) 369 { 370 struct adb_softc *sc; 371 struct adb_devinfo *dinfo; 372 uint16_t newr3; 373 374 dinfo = device_get_ivars(dev); 375 sc = device_get_softc(device_get_parent(dev)); 376 377 newr3 = dinfo->register3 & 0xff00; 378 newr3 |= (uint16_t)(newhandler); 379 380 adb_send_raw_packet_sync(sc->sc_dev,dinfo->address, ADB_COMMAND_LISTEN, 381 3, sizeof(uint16_t), (u_char *)(&newr3), NULL); 382 adb_send_raw_packet_sync(sc->sc_dev,dinfo->address, 383 ADB_COMMAND_TALK, 3, 0, NULL, NULL); 384 385 return (dinfo->handler_id); 386 } 387 388 size_t 389 adb_read_register(device_t dev, u_char reg, void *data) 390 { 391 struct adb_softc *sc; 392 struct adb_devinfo *dinfo; 393 size_t result; 394 395 dinfo = device_get_ivars(dev); 396 sc = device_get_softc(device_get_parent(dev)); 397 398 result = adb_send_raw_packet_sync(sc->sc_dev,dinfo->address, 399 ADB_COMMAND_TALK, reg, 0, NULL, data); 400 401 return (result); 402 } 403 404 size_t 405 adb_write_register(device_t dev, u_char reg, size_t len, void *data) 406 { 407 struct adb_softc *sc; 408 struct adb_devinfo *dinfo; 409 size_t result; 410 411 dinfo = device_get_ivars(dev); 412 sc = device_get_softc(device_get_parent(dev)); 413 414 result = adb_send_raw_packet_sync(sc->sc_dev,dinfo->address, 415 ADB_COMMAND_LISTEN, reg, len, (u_char *)data, NULL); 416 417 result = adb_send_raw_packet_sync(sc->sc_dev,dinfo->address, 418 ADB_COMMAND_TALK, reg, 0, NULL, NULL); 419 420 return (result); 421 } 422