1 /*- 2 * Copyright (c) 2015 Nathan Whitehorn 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/param.h> 28 #include <sys/systm.h> 29 #include <sys/module.h> 30 #include <sys/bus.h> 31 #include <sys/conf.h> 32 #include <sys/clock.h> 33 #include <sys/cpu.h> 34 #include <sys/eventhandler.h> 35 #include <sys/kernel.h> 36 #include <sys/kthread.h> 37 #include <sys/reboot.h> 38 #include <sys/sysctl.h> 39 #include <sys/endian.h> 40 41 #include <vm/vm.h> 42 #include <vm/pmap.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 #include <dev/ofw/openfirm.h> 47 48 #include "clock_if.h" 49 #include "opal.h" 50 51 static int opaldev_probe(device_t); 52 static int opaldev_attach(device_t); 53 /* clock interface */ 54 static int opal_gettime(device_t dev, struct timespec *ts); 55 static int opal_settime(device_t dev, struct timespec *ts); 56 /* ofw bus interface */ 57 static const struct ofw_bus_devinfo *opaldev_get_devinfo(device_t dev, 58 device_t child); 59 60 static void opal_shutdown(void *arg, int howto); 61 static void opal_handle_shutdown_message(void *unused, 62 struct opal_msg *msg); 63 static void opal_intr(void *); 64 65 static device_method_t opaldev_methods[] = { 66 /* Device interface */ 67 DEVMETHOD(device_probe, opaldev_probe), 68 DEVMETHOD(device_attach, opaldev_attach), 69 70 /* clock interface */ 71 DEVMETHOD(clock_gettime, opal_gettime), 72 DEVMETHOD(clock_settime, opal_settime), 73 74 /* Bus interface */ 75 DEVMETHOD(bus_child_pnpinfo, ofw_bus_gen_child_pnpinfo), 76 77 /* ofw_bus interface */ 78 DEVMETHOD(ofw_bus_get_devinfo, opaldev_get_devinfo), 79 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 80 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 81 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 82 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 83 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 84 85 DEVMETHOD_END 86 }; 87 88 static driver_t opaldev_driver = { 89 "opal", 90 opaldev_methods, 91 0 92 }; 93 94 EARLY_DRIVER_MODULE(opaldev, ofwbus, opaldev_driver, 0, 0, BUS_PASS_BUS); 95 96 static void opal_heartbeat(void); 97 static void opal_handle_messages(void); 98 99 static struct proc *opal_hb_proc; 100 static struct kproc_desc opal_heartbeat_kp = { 101 "opal_heartbeat", 102 opal_heartbeat, 103 &opal_hb_proc 104 }; 105 106 SYSINIT(opal_heartbeat_setup, SI_SUB_KTHREAD_IDLE, SI_ORDER_ANY, kproc_start, 107 &opal_heartbeat_kp); 108 109 static int opal_heartbeat_ms; 110 EVENTHANDLER_LIST_DEFINE(OPAL_ASYNC_COMP); 111 EVENTHANDLER_LIST_DEFINE(OPAL_EPOW); 112 EVENTHANDLER_LIST_DEFINE(OPAL_SHUTDOWN); 113 EVENTHANDLER_LIST_DEFINE(OPAL_HMI_EVT); 114 EVENTHANDLER_LIST_DEFINE(OPAL_DPO); 115 EVENTHANDLER_LIST_DEFINE(OPAL_OCC); 116 117 #define OPAL_SOFT_OFF 0 118 #define OPAL_SOFT_REBOOT 1 119 120 static void 121 opal_heartbeat(void) 122 { 123 uint64_t events; 124 125 if (opal_heartbeat_ms == 0) 126 kproc_exit(0); 127 128 while (1) { 129 events = 0; 130 /* Turn the OPAL state crank */ 131 opal_call(OPAL_POLL_EVENTS, vtophys(&events)); 132 if (be64toh(events) & OPAL_EVENT_MSG_PENDING) 133 opal_handle_messages(); 134 tsleep(opal_hb_proc, 0, "opal", 135 MSEC_2_TICKS(opal_heartbeat_ms)); 136 } 137 } 138 139 static int 140 opaldev_probe(device_t dev) 141 { 142 phandle_t iparent; 143 pcell_t *irqs; 144 int i, n_irqs; 145 146 if (!ofw_bus_is_compatible(dev, "ibm,opal-v3")) 147 return (ENXIO); 148 if (opal_check() != 0) 149 return (ENXIO); 150 151 device_set_desc(dev, "OPAL Abstraction Firmware"); 152 153 /* Manually add IRQs before attaching */ 154 if (OF_hasprop(ofw_bus_get_node(dev), "opal-interrupts")) { 155 iparent = OF_finddevice("/interrupt-controller@0"); 156 iparent = OF_xref_from_node(iparent); 157 158 n_irqs = OF_getproplen(ofw_bus_get_node(dev), 159 "opal-interrupts") / sizeof(*irqs); 160 irqs = malloc(n_irqs * sizeof(*irqs), M_DEVBUF, M_WAITOK); 161 OF_getencprop(ofw_bus_get_node(dev), "opal-interrupts", irqs, 162 n_irqs * sizeof(*irqs)); 163 for (i = 0; i < n_irqs; i++) 164 bus_set_resource(dev, SYS_RES_IRQ, i, 165 ofw_bus_map_intr(dev, iparent, 1, &irqs[i]), 1); 166 free(irqs, M_DEVBUF); 167 } 168 169 return (BUS_PROBE_SPECIFIC); 170 } 171 172 static int 173 opaldev_attach(device_t dev) 174 { 175 phandle_t child; 176 device_t cdev; 177 uint64_t junk; 178 int i, rv; 179 uint32_t async_count; 180 struct ofw_bus_devinfo *dinfo; 181 struct resource *irq; 182 183 /* Test for RTC support and register clock if it works */ 184 rv = opal_call(OPAL_RTC_READ, vtophys(&junk), vtophys(&junk)); 185 do { 186 rv = opal_call(OPAL_RTC_READ, vtophys(&junk), vtophys(&junk)); 187 if (rv == OPAL_BUSY_EVENT) 188 rv = opal_call(OPAL_POLL_EVENTS, 0); 189 } while (rv == OPAL_BUSY_EVENT); 190 191 if (rv == OPAL_SUCCESS) 192 clock_register(dev, 2000); 193 194 EVENTHANDLER_REGISTER(OPAL_SHUTDOWN, opal_handle_shutdown_message, 195 NULL, EVENTHANDLER_PRI_ANY); 196 EVENTHANDLER_REGISTER(shutdown_final, opal_shutdown, NULL, 197 SHUTDOWN_PRI_LAST); 198 199 OF_getencprop(ofw_bus_get_node(dev), "ibm,heartbeat-ms", 200 &opal_heartbeat_ms, sizeof(opal_heartbeat_ms)); 201 /* Bind to interrupts */ 202 for (i = 0; (irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i, 203 RF_ACTIVE)) != NULL; i++) 204 bus_setup_intr(dev, irq, INTR_TYPE_TTY | INTR_MPSAFE | 205 INTR_ENTROPY, NULL, opal_intr, (void *)rman_get_start(irq), 206 NULL); 207 208 OF_getencprop(ofw_bus_get_node(dev), "opal-msg-async-num", 209 &async_count, sizeof(async_count)); 210 opal_init_async_tokens(async_count); 211 212 for (child = OF_child(ofw_bus_get_node(dev)); child != 0; 213 child = OF_peer(child)) { 214 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 215 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { 216 free(dinfo, M_DEVBUF); 217 continue; 218 } 219 cdev = device_add_child(dev, NULL, DEVICE_UNIT_ANY); 220 if (cdev == NULL) { 221 device_printf(dev, "<%s>: device_add_child failed\n", 222 dinfo->obd_name); 223 ofw_bus_gen_destroy_devinfo(dinfo); 224 free(dinfo, M_DEVBUF); 225 continue; 226 } 227 device_set_ivars(cdev, dinfo); 228 } 229 230 return (bus_generic_attach(dev)); 231 } 232 233 static int 234 bcd2bin32(int bcd) 235 { 236 int out = 0; 237 238 out += bcd2bin(bcd & 0xff); 239 out += 100*bcd2bin((bcd & 0x0000ff00) >> 8); 240 out += 10000*bcd2bin((bcd & 0x00ff0000) >> 16); 241 out += 1000000*bcd2bin((bcd & 0xffff0000) >> 24); 242 243 return (out); 244 } 245 246 static int 247 bin2bcd32(int bin) 248 { 249 int out = 0; 250 int tmp; 251 252 tmp = bin % 100; 253 out += bin2bcd(tmp) * 0x1; 254 bin = bin / 100; 255 256 tmp = bin % 100; 257 out += bin2bcd(tmp) * 0x100; 258 bin = bin / 100; 259 260 tmp = bin % 100; 261 out += bin2bcd(tmp) * 0x10000; 262 263 return (out); 264 } 265 266 static int 267 opal_gettime(device_t dev, struct timespec *ts) 268 { 269 int rv; 270 struct clocktime ct; 271 uint32_t ymd; 272 uint64_t hmsm; 273 274 rv = opal_call(OPAL_RTC_READ, vtophys(&ymd), vtophys(&hmsm)); 275 while (rv == OPAL_BUSY_EVENT) { 276 opal_call(OPAL_POLL_EVENTS, 0); 277 pause("opalrtc", 1); 278 rv = opal_call(OPAL_RTC_READ, vtophys(&ymd), vtophys(&hmsm)); 279 } 280 281 if (rv != OPAL_SUCCESS) 282 return (ENXIO); 283 284 hmsm = be64toh(hmsm); 285 ymd = be32toh(ymd); 286 287 ct.nsec = bcd2bin32((hmsm & 0x000000ffffff0000) >> 16) * 1000; 288 ct.sec = bcd2bin((hmsm & 0x0000ff0000000000) >> 40); 289 ct.min = bcd2bin((hmsm & 0x00ff000000000000) >> 48); 290 ct.hour = bcd2bin((hmsm & 0xff00000000000000) >> 56); 291 292 ct.day = bcd2bin((ymd & 0x000000ff) >> 0); 293 ct.mon = bcd2bin((ymd & 0x0000ff00) >> 8); 294 ct.year = bcd2bin32((ymd & 0xffff0000) >> 16); 295 296 return (clock_ct_to_ts(&ct, ts)); 297 } 298 299 static int 300 opal_settime(device_t dev, struct timespec *ts) 301 { 302 int rv; 303 struct clocktime ct; 304 uint32_t ymd = 0; 305 uint64_t hmsm = 0; 306 307 clock_ts_to_ct(ts, &ct); 308 309 ymd |= (uint32_t)bin2bcd(ct.day); 310 ymd |= ((uint32_t)bin2bcd(ct.mon) << 8); 311 ymd |= ((uint32_t)bin2bcd32(ct.year) << 16); 312 313 hmsm |= ((uint64_t)bin2bcd32(ct.nsec/1000) << 16); 314 hmsm |= ((uint64_t)bin2bcd(ct.sec) << 40); 315 hmsm |= ((uint64_t)bin2bcd(ct.min) << 48); 316 hmsm |= ((uint64_t)bin2bcd(ct.hour) << 56); 317 318 /* 319 * We do NOT swap endian here, because the values are being sent 320 * via registers instead of indirect via memory. 321 */ 322 do { 323 rv = opal_call(OPAL_RTC_WRITE, ymd, hmsm); 324 if (rv == OPAL_BUSY_EVENT) { 325 rv = opal_call(OPAL_POLL_EVENTS, 0); 326 pause("opalrtc", 1); 327 } 328 } while (rv == OPAL_BUSY_EVENT); 329 330 if (rv != OPAL_SUCCESS) 331 return (ENXIO); 332 333 return (0); 334 } 335 336 static const struct ofw_bus_devinfo * 337 opaldev_get_devinfo(device_t dev, device_t child) 338 { 339 return (device_get_ivars(child)); 340 } 341 342 static void 343 opal_shutdown(void *arg, int howto) 344 { 345 346 if ((howto & RB_POWEROFF) != 0) 347 opal_call(OPAL_CEC_POWER_DOWN, 0 /* Normal power off */); 348 else if ((howto & RB_HALT) == 0) 349 opal_call(OPAL_CEC_REBOOT); 350 else 351 return; 352 353 opal_call(OPAL_RETURN_CPU); 354 } 355 356 static void 357 opal_handle_shutdown_message(void *unused, struct opal_msg *msg) 358 { 359 int howto; 360 361 switch (be64toh(msg->params[0])) { 362 case OPAL_SOFT_OFF: 363 howto = RB_POWEROFF; 364 break; 365 case OPAL_SOFT_REBOOT: 366 howto = RB_REROOT; 367 break; 368 } 369 shutdown_nice(howto); 370 } 371 372 static void 373 opal_handle_messages(void) 374 { 375 static struct opal_msg msg; 376 uint64_t rv; 377 uint32_t type; 378 379 rv = opal_call(OPAL_GET_MSG, vtophys(&msg), sizeof(msg)); 380 381 switch (rv) { 382 case OPAL_SUCCESS: 383 break; 384 case OPAL_RESOURCE: 385 /* no available messages - return */ 386 return; 387 case OPAL_PARAMETER: 388 printf("%s error: invalid buffer. Please file a bug report.\n", __func__); 389 return; 390 case OPAL_PARTIAL: 391 printf("%s error: buffer is too small and messages was discarded. Please file a bug report.\n", __func__); 392 return; 393 default: 394 printf("%s opal_call returned unknown result <%lu>\n", __func__, rv); 395 return; 396 } 397 398 type = be32toh(msg.msg_type); 399 switch (type) { 400 case OPAL_MSG_ASYNC_COMP: 401 EVENTHANDLER_DIRECT_INVOKE(OPAL_ASYNC_COMP, &msg); 402 break; 403 case OPAL_MSG_EPOW: 404 EVENTHANDLER_DIRECT_INVOKE(OPAL_EPOW, &msg); 405 break; 406 case OPAL_MSG_SHUTDOWN: 407 EVENTHANDLER_DIRECT_INVOKE(OPAL_SHUTDOWN, &msg); 408 break; 409 case OPAL_MSG_HMI_EVT: 410 EVENTHANDLER_DIRECT_INVOKE(OPAL_HMI_EVT, &msg); 411 break; 412 case OPAL_MSG_DPO: 413 EVENTHANDLER_DIRECT_INVOKE(OPAL_DPO, &msg); 414 break; 415 case OPAL_MSG_OCC: 416 EVENTHANDLER_DIRECT_INVOKE(OPAL_OCC, &msg); 417 break; 418 default: 419 printf("%s Unknown OPAL message type %d\n", __func__, type); 420 } 421 } 422 423 static void 424 opal_intr(void *xintr) 425 { 426 uint64_t events = 0; 427 428 opal_call(OPAL_HANDLE_INTERRUPT, (uint32_t)(uint64_t)xintr, 429 vtophys(&events)); 430 /* Wake up the heartbeat, if it's been setup. */ 431 if (be64toh(events) != 0 && opal_hb_proc != NULL) 432 wakeup(opal_hb_proc); 433 434 } 435