hw/misc/macio/pmu.c

   1 /*
   2  * QEMU PowerMac PMU device support
   3  *
   4  * Copyright (c) 2016 Benjamin Herrenschmidt, IBM Corp.
   5  * Copyright (c) 2018 Mark Cave-Ayland
   6  *
   7  * Based on the CUDA device by:
   8  *
   9  * Copyright (c) 2004-2007 Fabrice Bellard
  10  * Copyright (c) 2007 Jocelyn Mayer
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a copy
  13  * of this software and associated documentation files (the "Software"), to deal
  14  * in the Software without restriction, including without limitation the rights
  15  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  16  * copies of the Software, and to permit persons to whom the Software is
  17  * furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included in
  20  * all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  25  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  28  * THE SOFTWARE.
  29  */
  30
  31 #include "qemu/osdep.h"
  32 #include "qemu-common.h"
  33 #include "hw/ppc/mac.h"
  34 #include "hw/qdev-properties.h"
  35 #include "migration/vmstate.h"
  36 #include "hw/input/adb.h"
  37 #include "hw/irq.h"
  38 #include "hw/misc/mos6522.h"
  39 #include "hw/misc/macio/gpio.h"
  40 #include "hw/misc/macio/pmu.h"
  41 #include "qapi/error.h"
  42 #include "qemu/timer.h"
  43 #include "sysemu/runstate.h"
  44 #include "qapi/error.h"
  45 #include "qemu/cutils.h"
  46 #include "qemu/log.h"
  47 #include "qemu/module.h"
  48 #include "trace.h"
  49
  50
  51 /* Bits in B data register: all active low */
  52 #define TACK    0x08    /* Transfer request (input) */
  53 #define TREQ    0x10    /* Transfer acknowledge (output) */
  54
  55 /* PMU returns time_t's offset from Jan 1, 1904, not 1970 */
  56 #define RTC_OFFSET                      2082844800
  57
  58 #define VIA_TIMER_FREQ (4700000 / 6)
  59
  60 static void via_update_irq(PMUState *s)
  61 {
  62     MOS6522PMUState *mps = MOS6522_PMU(&s->mos6522_pmu);
  63     MOS6522State *ms = MOS6522(mps);
  64
  65     bool new_state = !!(ms->ifr & ms->ier & (SR_INT | T1_INT | T2_INT));
  66
  67     if (new_state != s->via_irq_state) {
  68         s->via_irq_state = new_state;
  69         qemu_set_irq(s->via_irq, new_state);
  70     }
  71 }
  72
  73 static void via_set_sr_int(void *opaque)
  74 {
  75     PMUState *s = opaque;
  76     MOS6522PMUState *mps = MOS6522_PMU(&s->mos6522_pmu);
  77     MOS6522State *ms = MOS6522(mps);
  78     MOS6522DeviceClass *mdc = MOS6522_DEVICE_GET_CLASS(ms);
  79
  80     mdc->set_sr_int(ms);
  81 }
  82
  83 static void pmu_update_extirq(PMUState *s)
  84 {
  85     if ((s->intbits & s->intmask) != 0) {
  86         macio_set_gpio(s->gpio, 1, false);
  87     } else {
  88         macio_set_gpio(s->gpio, 1, true);
  89     }
  90 }
  91
  92 static void pmu_adb_poll(void *opaque)
  93 {
  94     PMUState *s = opaque;
  95     ADBBusState *adb_bus = &s->adb_bus;
  96     int olen;
  97
  98     if (!(s->intbits & PMU_INT_ADB)) {
  99         olen = adb_poll(adb_bus, s->adb_reply, adb_bus->autopoll_mask);
 100         trace_pmu_adb_poll(olen);
 101
 102         if (olen > 0) {
 103             s->adb_reply_size = olen;
 104             s->intbits |= PMU_INT_ADB | PMU_INT_ADB_AUTO;
 105             pmu_update_extirq(s);
 106         }
 107     }
 108 }
 109
 110 static void pmu_one_sec_timer(void *opaque)
 111 {
 112     PMUState *s = opaque;
 113
 114     trace_pmu_one_sec_timer();
 115
 116     s->intbits |= PMU_INT_TICK;
 117     pmu_update_extirq(s);
 118     s->one_sec_target += 1000;
 119
 120     timer_mod(s->one_sec_timer, s->one_sec_target);
 121 }
 122
 123 static void pmu_cmd_int_ack(PMUState *s,
 124                             const uint8_t *in_data, uint8_t in_len,
 125                             uint8_t *out_data, uint8_t *out_len)
 126 {
 127     if (in_len != 0) {
 128         qemu_log_mask(LOG_GUEST_ERROR,
 129                       "PMU: INT_ACK command, invalid len: %d want: 0\n",
 130                       in_len);
 131         return;
 132     }
 133
 134     /* Make appropriate reply packet */
 135     if (s->intbits & PMU_INT_ADB) {
 136         if (!s->adb_reply_size) {
 137             qemu_log_mask(LOG_GUEST_ERROR,
 138                           "Odd, PMU_INT_ADB set with no reply in buffer\n");
 139         }
 140
 141         memcpy(out_data + 1, s->adb_reply, s->adb_reply_size);
 142         out_data[0] = s->intbits & (PMU_INT_ADB | PMU_INT_ADB_AUTO);
 143         *out_len = s->adb_reply_size + 1;
 144         s->intbits &= ~(PMU_INT_ADB | PMU_INT_ADB_AUTO);
 145         s->adb_reply_size = 0;
 146     } else {
 147         out_data[0] = s->intbits;
 148         s->intbits = 0;
 149         *out_len = 1;
 150     }
 151
 152     pmu_update_extirq(s);
 153 }
 154
 155 static void pmu_cmd_set_int_mask(PMUState *s,
 156                                  const uint8_t *in_data, uint8_t in_len,
 157                                  uint8_t *out_data, uint8_t *out_len)
 158 {
 159     if (in_len != 1) {
 160         qemu_log_mask(LOG_GUEST_ERROR,
 161                       "PMU: SET_INT_MASK command, invalid len: %d want: 1\n",
 162                       in_len);
 163         return;
 164     }
 165
 166     trace_pmu_cmd_set_int_mask(s->intmask);
 167     s->intmask = in_data[0];
 168
 169     pmu_update_extirq(s);
 170 }
 171
 172 static void pmu_cmd_set_adb_autopoll(PMUState *s, uint16_t mask)
 173 {
 174     ADBBusState *adb_bus = &s->adb_bus;
 175
 176     trace_pmu_cmd_set_adb_autopoll(mask);
 177
 178     if (mask) {
 179         adb_set_autopoll_mask(adb_bus, mask);
 180         adb_set_autopoll_enabled(adb_bus, true);
 181     } else {
 182         adb_set_autopoll_enabled(adb_bus, false);
 183     }
 184 }
 185
 186 static void pmu_cmd_adb(PMUState *s,
 187                         const uint8_t *in_data, uint8_t in_len,
 188                         uint8_t *out_data, uint8_t *out_len)
 189 {
 190     int len, adblen;
 191     uint8_t adb_cmd[255];
 192
 193     if (in_len < 2) {
 194         qemu_log_mask(LOG_GUEST_ERROR,
 195                       "PMU: ADB PACKET, invalid len: %d want at least 2\n",
 196                       in_len);
 197         return;
 198     }
 199
 200     *out_len = 0;
 201
 202     if (!s->has_adb) {
 203         trace_pmu_cmd_adb_nobus();
 204         return;
 205     }
 206
 207     /* Set autopoll is a special form of the command */
 208     if (in_data[0] == 0 && in_data[1] == 0x86) {
 209         uint16_t mask = in_data[2];
 210         mask = (mask << 8) | in_data[3];
 211         if (in_len != 4) {
 212             qemu_log_mask(LOG_GUEST_ERROR,
 213                           "PMU: ADB Autopoll requires 4 bytes, got %d\n",
 214                           in_len);
 215             return;
 216         }
 217
 218         pmu_cmd_set_adb_autopoll(s, mask);
 219         return;
 220     }
 221
 222     trace_pmu_cmd_adb_request(in_len, in_data[0], in_data[1], in_data[2],
 223                               in_data[3], in_data[4]);
 224
 225     *out_len = 0;
 226
 227     /* Check ADB len */
 228     adblen = in_data[2];
 229     if (adblen > (in_len - 3)) {
 230         qemu_log_mask(LOG_GUEST_ERROR,
 231                       "PMU: ADB len is %d > %d (in_len -3)...erroring\n",
 232                       adblen, in_len - 3);
 233         len = -1;
 234     } else if (adblen > 252) {
 235         qemu_log_mask(LOG_GUEST_ERROR, "PMU: ADB command too big!\n");
 236         len = -1;
 237     } else {
 238         /* Format command */
 239         adb_cmd[0] = in_data[0];
 240         memcpy(&adb_cmd[1], &in_data[3], in_len - 3);
 241         len = adb_request(&s->adb_bus, s->adb_reply + 2, adb_cmd, in_len - 2);
 242
 243         trace_pmu_cmd_adb_reply(len);
 244     }
 245
 246     if (len > 0) {
 247         /* XXX Check this */
 248         s->adb_reply_size = len + 2;
 249         s->adb_reply[0] = 0x01;
 250         s->adb_reply[1] = len;
 251     } else {
 252         /* XXX Check this */
 253         s->adb_reply_size = 1;
 254         s->adb_reply[0] = 0x00;
 255     }
 256
 257     s->intbits |= PMU_INT_ADB;
 258     pmu_update_extirq(s);
 259 }
 260
 261 static void pmu_cmd_adb_poll_off(PMUState *s,
 262                                  const uint8_t *in_data, uint8_t in_len,
 263                                  uint8_t *out_data, uint8_t *out_len)
 264 {
 265     ADBBusState *adb_bus = &s->adb_bus;
 266
 267     if (in_len != 0) {
 268         qemu_log_mask(LOG_GUEST_ERROR,
 269                       "PMU: ADB POLL OFF command, invalid len: %d want: 0\n",
 270                       in_len);
 271         return;
 272     }
 273
 274     if (s->has_adb) {
 275         adb_set_autopoll_enabled(adb_bus, false);
 276     }
 277 }
 278
 279 static void pmu_cmd_shutdown(PMUState *s,
 280                              const uint8_t *in_data, uint8_t in_len,
 281                              uint8_t *out_data, uint8_t *out_len)
 282 {
 283     if (in_len != 4) {
 284         qemu_log_mask(LOG_GUEST_ERROR,
 285                       "PMU: SHUTDOWN command, invalid len: %d want: 4\n",
 286                       in_len);
 287         return;
 288     }
 289
 290     *out_len = 1;
 291     out_data[0] = 0;
 292
 293     if (in_data[0] != 'M' || in_data[1] != 'A' || in_data[2] != 'T' ||
 294         in_data[3] != 'T') {
 295
 296         qemu_log_mask(LOG_GUEST_ERROR,
 297                       "PMU: SHUTDOWN command, Bad MATT signature\n");
 298         return;
 299     }
 300
 301     qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
 302 }
 303
 304 static void pmu_cmd_reset(PMUState *s,
 305                           const uint8_t *in_data, uint8_t in_len,
 306                           uint8_t *out_data, uint8_t *out_len)
 307 {
 308     if (in_len != 0) {
 309         qemu_log_mask(LOG_GUEST_ERROR,
 310                       "PMU: RESET command, invalid len: %d want: 0\n",
 311                       in_len);
 312         return;
 313     }
 314
 315     qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 316 }
 317
 318 static void pmu_cmd_get_rtc(PMUState *s,
 319                             const uint8_t *in_data, uint8_t in_len,
 320                             uint8_t *out_data, uint8_t *out_len)
 321 {
 322     uint32_t ti;
 323
 324     if (in_len != 0) {
 325         qemu_log_mask(LOG_GUEST_ERROR,
 326                       "PMU: GET_RTC command, invalid len: %d want: 0\n",
 327                       in_len);
 328         return;
 329     }
 330
 331     ti = s->tick_offset + (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
 332                            / NANOSECONDS_PER_SECOND);
 333     out_data[0] = ti >> 24;
 334     out_data[1] = ti >> 16;
 335     out_data[2] = ti >> 8;
 336     out_data[3] = ti;
 337     *out_len = 4;
 338 }
 339
 340 static void pmu_cmd_set_rtc(PMUState *s,
 341                             const uint8_t *in_data, uint8_t in_len,
 342                             uint8_t *out_data, uint8_t *out_len)
 343 {
 344     uint32_t ti;
 345
 346     if (in_len != 4) {
 347         qemu_log_mask(LOG_GUEST_ERROR,
 348                       "PMU: SET_RTC command, invalid len: %d want: 4\n",
 349                       in_len);
 350         return;
 351     }
 352
 353     ti = (((uint32_t)in_data[0]) << 24) + (((uint32_t)in_data[1]) << 16)
 354          + (((uint32_t)in_data[2]) << 8) + in_data[3];
 355
 356     s->tick_offset = ti - (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
 357                            / NANOSECONDS_PER_SECOND);
 358 }
 359
 360 static void pmu_cmd_system_ready(PMUState *s,
 361                                  const uint8_t *in_data, uint8_t in_len,
 362                                  uint8_t *out_data, uint8_t *out_len)
 363 {
 364     /* Do nothing */
 365 }
 366
 367 static void pmu_cmd_get_version(PMUState *s,
 368                                 const uint8_t *in_data, uint8_t in_len,
 369                                 uint8_t *out_data, uint8_t *out_len)
 370 {
 371     *out_len = 1;
 372     *out_data = 1; /* ??? Check what Apple does */
 373 }
 374
 375 static void pmu_cmd_power_events(PMUState *s,
 376                                  const uint8_t *in_data, uint8_t in_len,
 377                                  uint8_t *out_data, uint8_t *out_len)
 378 {
 379     if (in_len < 1) {
 380         qemu_log_mask(LOG_GUEST_ERROR,
 381                       "PMU: POWER EVENTS command, invalid len %d, want at least 1\n",
 382                       in_len);
 383         return;
 384     }
 385
 386     switch (in_data[0]) {
 387     /* Dummies for now */
 388     case PMU_PWR_GET_POWERUP_EVENTS:
 389         *out_len = 2;
 390         out_data[0] = 0;
 391         out_data[1] = 0;
 392         break;
 393     case PMU_PWR_SET_POWERUP_EVENTS:
 394     case PMU_PWR_CLR_POWERUP_EVENTS:
 395         break;
 396     case PMU_PWR_GET_WAKEUP_EVENTS:
 397         *out_len = 2;
 398         out_data[0] = 0;
 399         out_data[1] = 0;
 400         break;
 401     case PMU_PWR_SET_WAKEUP_EVENTS:
 402     case PMU_PWR_CLR_WAKEUP_EVENTS:
 403         break;
 404     default:
 405         qemu_log_mask(LOG_GUEST_ERROR,
 406                       "PMU: POWER EVENTS unknown subcommand 0x%02x\n",
 407                       in_data[0]);
 408     }
 409 }
 410
 411 static void pmu_cmd_get_cover(PMUState *s,
 412                               const uint8_t *in_data, uint8_t in_len,
 413                               uint8_t *out_data, uint8_t *out_len)
 414 {
 415     /* Not 100% sure here, will have to check what a real Mac
 416      * returns other than byte 0 bit 0 is LID closed on laptops
 417      */
 418     *out_len = 1;
 419     *out_data = 0x00;
 420 }
 421
 422 static void pmu_cmd_download_status(PMUState *s,
 423                                     const uint8_t *in_data, uint8_t in_len,
 424                                     uint8_t *out_data, uint8_t *out_len)
 425 {
 426     /* This has to do with PMU firmware updates as far as I can tell.
 427      *
 428      * We return 0x62 which is what OpenPMU expects
 429      */
 430     *out_len = 1;
 431     *out_data = 0x62;
 432 }
 433
 434 static void pmu_cmd_read_pmu_ram(PMUState *s,
 435                                  const uint8_t *in_data, uint8_t in_len,
 436                                  uint8_t *out_data, uint8_t *out_len)
 437 {
 438     if (in_len < 3) {
 439         qemu_log_mask(LOG_GUEST_ERROR,
 440                       "PMU: READ_PMU_RAM command, invalid len %d, expected 3\n",
 441                       in_len);
 442         return;
 443     }
 444
 445     qemu_log_mask(LOG_GUEST_ERROR,
 446                   "PMU: Unsupported READ_PMU_RAM, args: %02x %02x %02x\n",
 447                   in_data[0], in_data[1], in_data[2]);
 448
 449     *out_len = 0;
 450 }
 451
 452 /* description of commands */
 453 typedef struct PMUCmdHandler {
 454     uint8_t command;
 455     const char *name;
 456     void (*handler)(PMUState *s,
 457                     const uint8_t *in_args, uint8_t in_len,
 458                     uint8_t *out_args, uint8_t *out_len);
 459 } PMUCmdHandler;
 460
 461 static const PMUCmdHandler PMUCmdHandlers[] = {
 462     { PMU_INT_ACK, "INT ACK", pmu_cmd_int_ack },
 463     { PMU_SET_INTR_MASK, "SET INT MASK", pmu_cmd_set_int_mask },
 464     { PMU_ADB_CMD, "ADB COMMAND", pmu_cmd_adb },
 465     { PMU_ADB_POLL_OFF, "ADB POLL OFF", pmu_cmd_adb_poll_off },
 466     { PMU_RESET, "REBOOT", pmu_cmd_reset },
 467     { PMU_SHUTDOWN, "SHUTDOWN", pmu_cmd_shutdown },
 468     { PMU_READ_RTC, "GET RTC", pmu_cmd_get_rtc },
 469     { PMU_SET_RTC, "SET RTC", pmu_cmd_set_rtc },
 470     { PMU_SYSTEM_READY, "SYSTEM READY", pmu_cmd_system_ready },
 471     { PMU_GET_VERSION, "GET VERSION", pmu_cmd_get_version },
 472     { PMU_POWER_EVENTS, "POWER EVENTS", pmu_cmd_power_events },
 473     { PMU_GET_COVER, "GET_COVER", pmu_cmd_get_cover },
 474     { PMU_DOWNLOAD_STATUS, "DOWNLOAD STATUS", pmu_cmd_download_status },
 475     { PMU_READ_PMU_RAM, "READ PMGR RAM", pmu_cmd_read_pmu_ram },
 476 };
 477
 478 static void pmu_dispatch_cmd(PMUState *s)
 479 {
 480     unsigned int i;
 481
 482     /* No response by default */
 483     s->cmd_rsp_sz = 0;
 484
 485     for (i = 0; i < ARRAY_SIZE(PMUCmdHandlers); i++) {
 486         const PMUCmdHandler *desc = &PMUCmdHandlers[i];
 487
 488         if (desc->command != s->cmd) {
 489             continue;
 490         }
 491
 492         trace_pmu_dispatch_cmd(desc->name);
 493         desc->handler(s, s->cmd_buf, s->cmd_buf_pos,
 494                       s->cmd_rsp, &s->cmd_rsp_sz);
 495
 496         if (s->rsplen != -1 && s->rsplen != s->cmd_rsp_sz) {
 497             trace_pmu_debug_protocol_string("QEMU internal cmd resp mismatch!");
 498         } else {
 499             trace_pmu_debug_protocol_resp_size(s->cmd_rsp_sz);
 500         }
 501
 502         return;
 503     }
 504
 505     trace_pmu_dispatch_unknown_cmd(s->cmd);
 506
 507     /* Manufacture fake response with 0's */
 508     if (s->rsplen == -1) {
 509         s->cmd_rsp_sz = 0;
 510     } else {
 511         s->cmd_rsp_sz = s->rsplen;
 512         memset(s->cmd_rsp, 0, s->rsplen);
 513     }
 514 }
 515
 516 static void pmu_update(PMUState *s)
 517 {
 518     MOS6522PMUState *mps = &s->mos6522_pmu;
 519     MOS6522State *ms = MOS6522(mps);
 520     ADBBusState *adb_bus = &s->adb_bus;
 521
 522     /* Only react to changes in reg B */
 523     if (ms->b == s->last_b) {
 524         return;
 525     }
 526     s->last_b = ms->b;
 527
 528     /* Check the TREQ / TACK state */
 529     switch (ms->b & (TREQ | TACK)) {
 530     case TREQ:
 531         /* This is an ack release, handle it and bail out */
 532         ms->b |= TACK;
 533         s->last_b = ms->b;
 534
 535         trace_pmu_debug_protocol_string("handshake: TREQ high, setting TACK");
 536         return;
 537     case TACK:
 538         /* This is a valid request, handle below */
 539         break;
 540     case TREQ | TACK:
 541         /* This is an idle state */
 542         return;
 543     default:
 544         /* Invalid state, log and ignore */
 545         trace_pmu_debug_protocol_error(ms->b);
 546         return;
 547     }
 548
 549     /* If we wanted to handle commands asynchronously, this is where
 550      * we would delay the clearing of TACK until we are ready to send
 551      * the response
 552      */
 553
 554     /* We have a request, handshake TACK so we don't stay in
 555      * an invalid state. If we were concurrent with the OS we
 556      * should only do this after we grabbed the SR but that isn't
 557      * a problem here.
 558      */
 559
 560     trace_pmu_debug_protocol_clear_treq(s->cmd_state);
 561
 562     ms->b &= ~TACK;
 563     s->last_b = ms->b;
 564
 565     /* Act according to state */
 566     switch (s->cmd_state) {
 567     case pmu_state_idle:
 568         if (!(ms->acr & SR_OUT)) {
 569             trace_pmu_debug_protocol_string("protocol error! "
 570                                             "state idle, ACR reading");
 571             break;
 572         }
 573
 574         s->cmd = ms->sr;
 575         via_set_sr_int(s);
 576         s->cmdlen = pmu_data_len[s->cmd][0];
 577         s->rsplen = pmu_data_len[s->cmd][1];
 578         s->cmd_buf_pos = 0;
 579         s->cmd_rsp_pos = 0;
 580         s->cmd_state = pmu_state_cmd;
 581
 582         adb_autopoll_block(adb_bus);
 583         trace_pmu_debug_protocol_cmd(s->cmd, s->cmdlen, s->rsplen);
 584         break;
 585
 586     case pmu_state_cmd:
 587         if (!(ms->acr & SR_OUT)) {
 588             trace_pmu_debug_protocol_string("protocol error! "
 589                                             "state cmd, ACR reading");
 590             break;
 591         }
 592
 593         if (s->cmdlen == -1) {
 594             trace_pmu_debug_protocol_cmdlen(ms->sr);
 595
 596             s->cmdlen = ms->sr;
 597             if (s->cmdlen > sizeof(s->cmd_buf)) {
 598                 trace_pmu_debug_protocol_cmd_toobig(s->cmdlen);
 599             }
 600         } else if (s->cmd_buf_pos < sizeof(s->cmd_buf)) {
 601             s->cmd_buf[s->cmd_buf_pos++] = ms->sr;
 602         }
 603
 604         via_set_sr_int(s);
 605         break;
 606
 607     case pmu_state_rsp:
 608         if (ms->acr & SR_OUT) {
 609             trace_pmu_debug_protocol_string("protocol error! "
 610                                             "state resp, ACR writing");
 611             break;
 612         }
 613
 614         if (s->rsplen == -1) {
 615             trace_pmu_debug_protocol_cmd_send_resp_size(s->cmd_rsp_sz);
 616
 617             ms->sr = s->cmd_rsp_sz;
 618             s->rsplen = s->cmd_rsp_sz;
 619         } else if (s->cmd_rsp_pos < s->cmd_rsp_sz) {
 620             trace_pmu_debug_protocol_cmd_send_resp(s->cmd_rsp_pos, s->rsplen);
 621
 622             ms->sr = s->cmd_rsp[s->cmd_rsp_pos++];
 623         }
 624
 625         via_set_sr_int(s);
 626         break;
 627     }
 628
 629     /* Check for state completion */
 630     if (s->cmd_state == pmu_state_cmd && s->cmdlen == s->cmd_buf_pos) {
 631         trace_pmu_debug_protocol_string("Command reception complete, "
 632                                         "dispatching...");
 633
 634         pmu_dispatch_cmd(s);
 635         s->cmd_state = pmu_state_rsp;
 636     }
 637
 638     if (s->cmd_state == pmu_state_rsp && s->rsplen == s->cmd_rsp_pos) {
 639         trace_pmu_debug_protocol_cmd_resp_complete(ms->ier);
 640
 641         adb_autopoll_unblock(adb_bus);
 642         s->cmd_state = pmu_state_idle;
 643     }
 644 }
 645
 646 static uint64_t mos6522_pmu_read(void *opaque, hwaddr addr, unsigned size)
 647 {
 648     PMUState *s = opaque;
 649     MOS6522PMUState *mps = &s->mos6522_pmu;
 650     MOS6522State *ms = MOS6522(mps);
 651
 652     addr = (addr >> 9) & 0xf;
 653     return mos6522_read(ms, addr, size);
 654 }
 655
 656 static void mos6522_pmu_write(void *opaque, hwaddr addr, uint64_t val,
 657                               unsigned size)
 658 {
 659     PMUState *s = opaque;
 660     MOS6522PMUState *mps = &s->mos6522_pmu;
 661     MOS6522State *ms = MOS6522(mps);
 662
 663     addr = (addr >> 9) & 0xf;
 664     mos6522_write(ms, addr, val, size);
 665 }
 666
 667 static const MemoryRegionOps mos6522_pmu_ops = {
 668     .read = mos6522_pmu_read,
 669     .write = mos6522_pmu_write,
 670     .endianness = DEVICE_BIG_ENDIAN,
 671     .impl = {
 672         .min_access_size = 1,
 673         .max_access_size = 1,
 674     },
 675 };
 676
 677 static bool pmu_adb_state_needed(void *opaque)
 678 {
 679     PMUState *s = opaque;
 680
 681     return s->has_adb;
 682 }
 683
 684 static const VMStateDescription vmstate_pmu_adb = {
 685     .name = "pmu/adb",
 686     .version_id = 1,
 687     .minimum_version_id = 1,
 688     .needed = pmu_adb_state_needed,
 689     .fields = (VMStateField[]) {
 690         VMSTATE_UINT8(adb_reply_size, PMUState),
 691         VMSTATE_BUFFER(adb_reply, PMUState),
 692         VMSTATE_END_OF_LIST()
 693     }
 694 };
 695
 696 static const VMStateDescription vmstate_pmu = {
 697     .name = "pmu",
 698     .version_id = 1,
 699     .minimum_version_id = 1,
 700     .fields = (VMStateField[]) {
 701         VMSTATE_STRUCT(mos6522_pmu.parent_obj, PMUState, 0, vmstate_mos6522,
 702                        MOS6522State),
 703         VMSTATE_UINT8(last_b, PMUState),
 704         VMSTATE_UINT8(cmd, PMUState),
 705         VMSTATE_UINT32(cmdlen, PMUState),
 706         VMSTATE_UINT32(rsplen, PMUState),
 707         VMSTATE_UINT8(cmd_buf_pos, PMUState),
 708         VMSTATE_BUFFER(cmd_buf, PMUState),
 709         VMSTATE_UINT8(cmd_rsp_pos, PMUState),
 710         VMSTATE_UINT8(cmd_rsp_sz, PMUState),
 711         VMSTATE_BUFFER(cmd_rsp, PMUState),
 712         VMSTATE_UINT8(intbits, PMUState),
 713         VMSTATE_UINT8(intmask, PMUState),
 714         VMSTATE_UINT32(tick_offset, PMUState),
 715         VMSTATE_TIMER_PTR(one_sec_timer, PMUState),
 716         VMSTATE_INT64(one_sec_target, PMUState),
 717         VMSTATE_END_OF_LIST()
 718     },
 719     .subsections = (const VMStateDescription * []) {
 720         &vmstate_pmu_adb,
 721     }
 722 };
 723
 724 static void pmu_reset(DeviceState *dev)
 725 {
 726     PMUState *s = VIA_PMU(dev);
 727
 728     /* OpenBIOS needs to do this? MacOS 9 needs it */
 729     s->intmask = PMU_INT_ADB | PMU_INT_TICK;
 730     s->intbits = 0;
 731
 732     s->cmd_state = pmu_state_idle;
 733 }
 734
 735 static void pmu_realize(DeviceState *dev, Error **errp)
 736 {
 737     PMUState *s = VIA_PMU(dev);
 738     Error *err = NULL;
 739     SysBusDevice *sbd;
 740     ADBBusState *adb_bus = &s->adb_bus;
 741     struct tm tm;
 742
 743     if (!sysbus_realize(SYS_BUS_DEVICE(&s->mos6522_pmu), &err)) {
 744         error_propagate(errp, err);
 745         return;
 746     }
 747
 748     /* Pass IRQ from 6522 */
 749     sbd = SYS_BUS_DEVICE(s);
 750     sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->mos6522_pmu));
 751
 752     qemu_get_timedate(&tm, 0);
 753     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
 754     s->one_sec_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, pmu_one_sec_timer, s);
 755     s->one_sec_target = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 1000;
 756     timer_mod(s->one_sec_timer, s->one_sec_target);
 757
 758     if (s->has_adb) {
 759         qbus_create_inplace(&s->adb_bus, sizeof(s->adb_bus), TYPE_ADB_BUS,
 760                             dev, "adb.0");
 761         adb_register_autopoll_callback(adb_bus, pmu_adb_poll, s);
 762     }
 763 }
 764
 765 static void pmu_init(Object *obj)
 766 {
 767     SysBusDevice *d = SYS_BUS_DEVICE(obj);
 768     PMUState *s = VIA_PMU(obj);
 769
 770     object_property_add_link(obj, "gpio", TYPE_MACIO_GPIO,
 771                              (Object **) &s->gpio,
 772                              qdev_prop_allow_set_link_before_realize,
 773                              0);
 774
 775     object_initialize_child(obj, "mos6522-pmu", &s->mos6522_pmu,
 776                             TYPE_MOS6522_PMU);
 777
 778     memory_region_init_io(&s->mem, obj, &mos6522_pmu_ops, s, "via-pmu",
 779                           0x2000);
 780     sysbus_init_mmio(d, &s->mem);
 781 }
 782
 783 static Property pmu_properties[] = {
 784     DEFINE_PROP_BOOL("has-adb", PMUState, has_adb, true),
 785     DEFINE_PROP_END_OF_LIST()
 786 };
 787
 788 static void pmu_class_init(ObjectClass *oc, void *data)
 789 {
 790     DeviceClass *dc = DEVICE_CLASS(oc);
 791
 792     dc->realize = pmu_realize;
 793     dc->reset = pmu_reset;
 794     dc->vmsd = &vmstate_pmu;
 795     device_class_set_props(dc, pmu_properties);
 796     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 797 }
 798
 799 static const TypeInfo pmu_type_info = {
 800     .name = TYPE_VIA_PMU,
 801     .parent = TYPE_SYS_BUS_DEVICE,
 802     .instance_size = sizeof(PMUState),
 803     .instance_init = pmu_init,
 804     .class_init = pmu_class_init,
 805 };
 806
 807 static void mos6522_pmu_portB_write(MOS6522State *s)
 808 {
 809     MOS6522PMUState *mps = container_of(s, MOS6522PMUState, parent_obj);
 810     PMUState *ps = container_of(mps, PMUState, mos6522_pmu);
 811
 812     if ((s->pcr & 0xe0) == 0x20 || (s->pcr & 0xe0) == 0x60) {
 813         s->ifr &= ~CB2_INT;
 814     }
 815     s->ifr &= ~CB1_INT;
 816
 817     via_update_irq(ps);
 818     pmu_update(ps);
 819 }
 820
 821 static void mos6522_pmu_portA_write(MOS6522State *s)
 822 {
 823     MOS6522PMUState *mps = container_of(s, MOS6522PMUState, parent_obj);
 824     PMUState *ps = container_of(mps, PMUState, mos6522_pmu);
 825
 826     if ((s->pcr & 0x0e) == 0x02 || (s->pcr & 0x0e) == 0x06) {
 827         s->ifr &= ~CA2_INT;
 828     }
 829     s->ifr &= ~CA1_INT;
 830
 831     via_update_irq(ps);
 832 }
 833
 834 static void mos6522_pmu_reset(DeviceState *dev)
 835 {
 836     MOS6522State *ms = MOS6522(dev);
 837     MOS6522PMUState *mps = container_of(ms, MOS6522PMUState, parent_obj);
 838     PMUState *s = container_of(mps, PMUState, mos6522_pmu);
 839     MOS6522DeviceClass *mdc = MOS6522_DEVICE_GET_CLASS(ms);
 840
 841     mdc->parent_reset(dev);
 842
 843     ms->timers[0].frequency = VIA_TIMER_FREQ;
 844     ms->timers[1].frequency = (SCALE_US * 6000) / 4700;
 845
 846     s->last_b = ms->b = TACK | TREQ;
 847 }
 848
 849 static void mos6522_pmu_class_init(ObjectClass *oc, void *data)
 850 {
 851     DeviceClass *dc = DEVICE_CLASS(oc);
 852     MOS6522DeviceClass *mdc = MOS6522_DEVICE_CLASS(oc);
 853
 854     dc->reset = mos6522_pmu_reset;
 855     mdc->portB_write = mos6522_pmu_portB_write;
 856     mdc->portA_write = mos6522_pmu_portA_write;
 857 }
 858
 859 static const TypeInfo mos6522_pmu_type_info = {
 860     .name = TYPE_MOS6522_PMU,
 861     .parent = TYPE_MOS6522,
 862     .instance_size = sizeof(MOS6522PMUState),
 863     .class_init = mos6522_pmu_class_init,
 864 };
 865
 866 static void pmu_register_types(void)
 867 {
 868     type_register_static(&pmu_type_info);
 869     type_register_static(&mos6522_pmu_type_info);
 870 }
 871
 872 type_init(pmu_register_types)