hw/arm/strongarm.c

   1 /*
   2  * StrongARM SA-1100/SA-1110 emulation
   3  *
   4  * Copyright (C) 2011 Dmitry Eremin-Solenikov
   5  *
   6  * Largely based on StrongARM emulation:
   7  * Copyright (c) 2006 Openedhand Ltd.
   8  * Written by Andrzej Zaborowski <balrog@zabor.org>
   9  *
  10  * UART code based on QEMU 16550A UART emulation
  11  * Copyright (c) 2003-2004 Fabrice Bellard
  12  * Copyright (c) 2008 Citrix Systems, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License along
  24  *  with this program; if not, see <http://www.gnu.org/licenses/>.
  25  *
  26  *  Contributions after 2012-01-13 are licensed under the terms of the
  27  *  GNU GPL, version 2 or (at your option) any later version.
  28  */
  29 #include "hw/sysbus.h"
  30 #include "strongarm.h"
  31 #include "qemu/error-report.h"
  32 #include "hw/arm/arm.h"
  33 #include "sysemu/char.h"
  34 #include "sysemu/sysemu.h"
  35 #include "hw/ssi.h"
  36
  37 //#define DEBUG
  38
  39 /*
  40  TODO
  41  - Implement cp15, c14 ?
  42  - Implement cp15, c15 !!! (idle used in L)
  43  - Implement idle mode handling/DIM
  44  - Implement sleep mode/Wake sources
  45  - Implement reset control
  46  - Implement memory control regs
  47  - PCMCIA handling
  48  - Maybe support MBGNT/MBREQ
  49  - DMA channels
  50  - GPCLK
  51  - IrDA
  52  - MCP
  53  - Enhance UART with modem signals
  54  */
  55
  56 #ifdef DEBUG
  57 # define DPRINTF(format, ...) printf(format , ## __VA_ARGS__)
  58 #else
  59 # define DPRINTF(format, ...) do { } while (0)
  60 #endif
  61
  62 static struct {
  63     hwaddr io_base;
  64     int irq;
  65 } sa_serial[] = {
  66     { 0x80010000, SA_PIC_UART1 },
  67     { 0x80030000, SA_PIC_UART2 },
  68     { 0x80050000, SA_PIC_UART3 },
  69     { 0, 0 }
  70 };
  71
  72 /* Interrupt Controller */
  73
  74 #define TYPE_STRONGARM_PIC "strongarm_pic"
  75 #define STRONGARM_PIC(obj) \
  76     OBJECT_CHECK(StrongARMPICState, (obj), TYPE_STRONGARM_PIC)
  77
  78 typedef struct StrongARMPICState {
  79     SysBusDevice parent_obj;
  80
  81     MemoryRegion iomem;
  82     qemu_irq    irq;
  83     qemu_irq    fiq;
  84
  85     uint32_t pending;
  86     uint32_t enabled;
  87     uint32_t is_fiq;
  88     uint32_t int_idle;
  89 } StrongARMPICState;
  90
  91 #define ICIP    0x00
  92 #define ICMR    0x04
  93 #define ICLR    0x08
  94 #define ICFP    0x10
  95 #define ICPR    0x20
  96 #define ICCR    0x0c
  97
  98 #define SA_PIC_SRCS     32
  99
 100
 101 static void strongarm_pic_update(void *opaque)
 102 {
 103     StrongARMPICState *s = opaque;
 104
 105     /* FIXME: reflect DIM */
 106     qemu_set_irq(s->fiq, s->pending & s->enabled &  s->is_fiq);
 107     qemu_set_irq(s->irq, s->pending & s->enabled & ~s->is_fiq);
 108 }
 109
 110 static void strongarm_pic_set_irq(void *opaque, int irq, int level)
 111 {
 112     StrongARMPICState *s = opaque;
 113
 114     if (level) {
 115         s->pending |= 1 << irq;
 116     } else {
 117         s->pending &= ~(1 << irq);
 118     }
 119
 120     strongarm_pic_update(s);
 121 }
 122
 123 static uint64_t strongarm_pic_mem_read(void *opaque, hwaddr offset,
 124                                        unsigned size)
 125 {
 126     StrongARMPICState *s = opaque;
 127
 128     switch (offset) {
 129     case ICIP:
 130         return s->pending & ~s->is_fiq & s->enabled;
 131     case ICMR:
 132         return s->enabled;
 133     case ICLR:
 134         return s->is_fiq;
 135     case ICCR:
 136         return s->int_idle == 0;
 137     case ICFP:
 138         return s->pending & s->is_fiq & s->enabled;
 139     case ICPR:
 140         return s->pending;
 141     default:
 142         printf("%s: Bad register offset 0x" TARGET_FMT_plx "\n",
 143                         __func__, offset);
 144         return 0;
 145     }
 146 }
 147
 148 static void strongarm_pic_mem_write(void *opaque, hwaddr offset,
 149                                     uint64_t value, unsigned size)
 150 {
 151     StrongARMPICState *s = opaque;
 152
 153     switch (offset) {
 154     case ICMR:
 155         s->enabled = value;
 156         break;
 157     case ICLR:
 158         s->is_fiq = value;
 159         break;
 160     case ICCR:
 161         s->int_idle = (value & 1) ? 0 : ~0;
 162         break;
 163     default:
 164         printf("%s: Bad register offset 0x" TARGET_FMT_plx "\n",
 165                         __func__, offset);
 166         break;
 167     }
 168     strongarm_pic_update(s);
 169 }
 170
 171 static const MemoryRegionOps strongarm_pic_ops = {
 172     .read = strongarm_pic_mem_read,
 173     .write = strongarm_pic_mem_write,
 174     .endianness = DEVICE_NATIVE_ENDIAN,
 175 };
 176
 177 static int strongarm_pic_initfn(SysBusDevice *sbd)
 178 {
 179     DeviceState *dev = DEVICE(sbd);
 180     StrongARMPICState *s = STRONGARM_PIC(dev);
 181
 182     qdev_init_gpio_in(dev, strongarm_pic_set_irq, SA_PIC_SRCS);
 183     memory_region_init_io(&s->iomem, OBJECT(s), &strongarm_pic_ops, s,
 184                           "pic", 0x1000);
 185     sysbus_init_mmio(sbd, &s->iomem);
 186     sysbus_init_irq(sbd, &s->irq);
 187     sysbus_init_irq(sbd, &s->fiq);
 188
 189     return 0;
 190 }
 191
 192 static int strongarm_pic_post_load(void *opaque, int version_id)
 193 {
 194     strongarm_pic_update(opaque);
 195     return 0;
 196 }
 197
 198 static VMStateDescription vmstate_strongarm_pic_regs = {
 199     .name = "strongarm_pic",
 200     .version_id = 0,
 201     .minimum_version_id = 0,
 202     .post_load = strongarm_pic_post_load,
 203     .fields = (VMStateField[]) {
 204         VMSTATE_UINT32(pending, StrongARMPICState),
 205         VMSTATE_UINT32(enabled, StrongARMPICState),
 206         VMSTATE_UINT32(is_fiq, StrongARMPICState),
 207         VMSTATE_UINT32(int_idle, StrongARMPICState),
 208         VMSTATE_END_OF_LIST(),
 209     },
 210 };
 211
 212 static void strongarm_pic_class_init(ObjectClass *klass, void *data)
 213 {
 214     DeviceClass *dc = DEVICE_CLASS(klass);
 215     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 216
 217     k->init = strongarm_pic_initfn;
 218     dc->desc = "StrongARM PIC";
 219     dc->vmsd = &vmstate_strongarm_pic_regs;
 220 }
 221
 222 static const TypeInfo strongarm_pic_info = {
 223     .name          = TYPE_STRONGARM_PIC,
 224     .parent        = TYPE_SYS_BUS_DEVICE,
 225     .instance_size = sizeof(StrongARMPICState),
 226     .class_init    = strongarm_pic_class_init,
 227 };
 228
 229 /* Real-Time Clock */
 230 #define RTAR 0x00 /* RTC Alarm register */
 231 #define RCNR 0x04 /* RTC Counter register */
 232 #define RTTR 0x08 /* RTC Timer Trim register */
 233 #define RTSR 0x10 /* RTC Status register */
 234
 235 #define RTSR_AL (1 << 0) /* RTC Alarm detected */
 236 #define RTSR_HZ (1 << 1) /* RTC 1Hz detected */
 237 #define RTSR_ALE (1 << 2) /* RTC Alarm enable */
 238 #define RTSR_HZE (1 << 3) /* RTC 1Hz enable */
 239
 240 /* 16 LSB of RTTR are clockdiv for internal trim logic,
 241  * trim delete isn't emulated, so
 242  * f = 32 768 / (RTTR_trim + 1) */
 243
 244 #define TYPE_STRONGARM_RTC "strongarm-rtc"
 245 #define STRONGARM_RTC(obj) \
 246     OBJECT_CHECK(StrongARMRTCState, (obj), TYPE_STRONGARM_RTC)
 247
 248 typedef struct StrongARMRTCState {
 249     SysBusDevice parent_obj;
 250
 251     MemoryRegion iomem;
 252     uint32_t rttr;
 253     uint32_t rtsr;
 254     uint32_t rtar;
 255     uint32_t last_rcnr;
 256     int64_t last_hz;
 257     QEMUTimer *rtc_alarm;
 258     QEMUTimer *rtc_hz;
 259     qemu_irq rtc_irq;
 260     qemu_irq rtc_hz_irq;
 261 } StrongARMRTCState;
 262
 263 static inline void strongarm_rtc_int_update(StrongARMRTCState *s)
 264 {
 265     qemu_set_irq(s->rtc_irq, s->rtsr & RTSR_AL);
 266     qemu_set_irq(s->rtc_hz_irq, s->rtsr & RTSR_HZ);
 267 }
 268
 269 static void strongarm_rtc_hzupdate(StrongARMRTCState *s)
 270 {
 271     int64_t rt = qemu_clock_get_ms(rtc_clock);
 272     s->last_rcnr += ((rt - s->last_hz) << 15) /
 273             (1000 * ((s->rttr & 0xffff) + 1));
 274     s->last_hz = rt;
 275 }
 276
 277 static inline void strongarm_rtc_timer_update(StrongARMRTCState *s)
 278 {
 279     if ((s->rtsr & RTSR_HZE) && !(s->rtsr & RTSR_HZ)) {
 280         timer_mod(s->rtc_hz, s->last_hz + 1000);
 281     } else {
 282         timer_del(s->rtc_hz);
 283     }
 284
 285     if ((s->rtsr & RTSR_ALE) && !(s->rtsr & RTSR_AL)) {
 286         timer_mod(s->rtc_alarm, s->last_hz +
 287                 (((s->rtar - s->last_rcnr) * 1000 *
 288                   ((s->rttr & 0xffff) + 1)) >> 15));
 289     } else {
 290         timer_del(s->rtc_alarm);
 291     }
 292 }
 293
 294 static inline void strongarm_rtc_alarm_tick(void *opaque)
 295 {
 296     StrongARMRTCState *s = opaque;
 297     s->rtsr |= RTSR_AL;
 298     strongarm_rtc_timer_update(s);
 299     strongarm_rtc_int_update(s);
 300 }
 301
 302 static inline void strongarm_rtc_hz_tick(void *opaque)
 303 {
 304     StrongARMRTCState *s = opaque;
 305     s->rtsr |= RTSR_HZ;
 306     strongarm_rtc_timer_update(s);
 307     strongarm_rtc_int_update(s);
 308 }
 309
 310 static uint64_t strongarm_rtc_read(void *opaque, hwaddr addr,
 311                                    unsigned size)
 312 {
 313     StrongARMRTCState *s = opaque;
 314
 315     switch (addr) {
 316     case RTTR:
 317         return s->rttr;
 318     case RTSR:
 319         return s->rtsr;
 320     case RTAR:
 321         return s->rtar;
 322     case RCNR:
 323         return s->last_rcnr +
 324                 ((qemu_clock_get_ms(rtc_clock) - s->last_hz) << 15) /
 325                 (1000 * ((s->rttr & 0xffff) + 1));
 326     default:
 327         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
 328         return 0;
 329     }
 330 }
 331
 332 static void strongarm_rtc_write(void *opaque, hwaddr addr,
 333                                 uint64_t value, unsigned size)
 334 {
 335     StrongARMRTCState *s = opaque;
 336     uint32_t old_rtsr;
 337
 338     switch (addr) {
 339     case RTTR:
 340         strongarm_rtc_hzupdate(s);
 341         s->rttr = value;
 342         strongarm_rtc_timer_update(s);
 343         break;
 344
 345     case RTSR:
 346         old_rtsr = s->rtsr;
 347         s->rtsr = (value & (RTSR_ALE | RTSR_HZE)) |
 348                   (s->rtsr & ~(value & (RTSR_AL | RTSR_HZ)));
 349
 350         if (s->rtsr != old_rtsr) {
 351             strongarm_rtc_timer_update(s);
 352         }
 353
 354         strongarm_rtc_int_update(s);
 355         break;
 356
 357     case RTAR:
 358         s->rtar = value;
 359         strongarm_rtc_timer_update(s);
 360         break;
 361
 362     case RCNR:
 363         strongarm_rtc_hzupdate(s);
 364         s->last_rcnr = value;
 365         strongarm_rtc_timer_update(s);
 366         break;
 367
 368     default:
 369         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
 370     }
 371 }
 372
 373 static const MemoryRegionOps strongarm_rtc_ops = {
 374     .read = strongarm_rtc_read,
 375     .write = strongarm_rtc_write,
 376     .endianness = DEVICE_NATIVE_ENDIAN,
 377 };
 378
 379 static int strongarm_rtc_init(SysBusDevice *dev)
 380 {
 381     StrongARMRTCState *s = STRONGARM_RTC(dev);
 382     struct tm tm;
 383
 384     s->rttr = 0x0;
 385     s->rtsr = 0;
 386
 387     qemu_get_timedate(&tm, 0);
 388
 389     s->last_rcnr = (uint32_t) mktimegm(&tm);
 390     s->last_hz = qemu_clock_get_ms(rtc_clock);
 391
 392     s->rtc_alarm = timer_new_ms(rtc_clock, strongarm_rtc_alarm_tick, s);
 393     s->rtc_hz = timer_new_ms(rtc_clock, strongarm_rtc_hz_tick, s);
 394
 395     sysbus_init_irq(dev, &s->rtc_irq);
 396     sysbus_init_irq(dev, &s->rtc_hz_irq);
 397
 398     memory_region_init_io(&s->iomem, OBJECT(s), &strongarm_rtc_ops, s,
 399                           "rtc", 0x10000);
 400     sysbus_init_mmio(dev, &s->iomem);
 401
 402     return 0;
 403 }
 404
 405 static void strongarm_rtc_pre_save(void *opaque)
 406 {
 407     StrongARMRTCState *s = opaque;
 408
 409     strongarm_rtc_hzupdate(s);
 410 }
 411
 412 static int strongarm_rtc_post_load(void *opaque, int version_id)
 413 {
 414     StrongARMRTCState *s = opaque;
 415
 416     strongarm_rtc_timer_update(s);
 417     strongarm_rtc_int_update(s);
 418
 419     return 0;
 420 }
 421
 422 static const VMStateDescription vmstate_strongarm_rtc_regs = {
 423     .name = "strongarm-rtc",
 424     .version_id = 0,
 425     .minimum_version_id = 0,
 426     .pre_save = strongarm_rtc_pre_save,
 427     .post_load = strongarm_rtc_post_load,
 428     .fields = (VMStateField[]) {
 429         VMSTATE_UINT32(rttr, StrongARMRTCState),
 430         VMSTATE_UINT32(rtsr, StrongARMRTCState),
 431         VMSTATE_UINT32(rtar, StrongARMRTCState),
 432         VMSTATE_UINT32(last_rcnr, StrongARMRTCState),
 433         VMSTATE_INT64(last_hz, StrongARMRTCState),
 434         VMSTATE_END_OF_LIST(),
 435     },
 436 };
 437
 438 static void strongarm_rtc_sysbus_class_init(ObjectClass *klass, void *data)
 439 {
 440     DeviceClass *dc = DEVICE_CLASS(klass);
 441     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 442
 443     k->init = strongarm_rtc_init;
 444     dc->desc = "StrongARM RTC Controller";
 445     dc->vmsd = &vmstate_strongarm_rtc_regs;
 446 }
 447
 448 static const TypeInfo strongarm_rtc_sysbus_info = {
 449     .name          = TYPE_STRONGARM_RTC,
 450     .parent        = TYPE_SYS_BUS_DEVICE,
 451     .instance_size = sizeof(StrongARMRTCState),
 452     .class_init    = strongarm_rtc_sysbus_class_init,
 453 };
 454
 455 /* GPIO */
 456 #define GPLR 0x00
 457 #define GPDR 0x04
 458 #define GPSR 0x08
 459 #define GPCR 0x0c
 460 #define GRER 0x10
 461 #define GFER 0x14
 462 #define GEDR 0x18
 463 #define GAFR 0x1c
 464
 465 #define TYPE_STRONGARM_GPIO "strongarm-gpio"
 466 #define STRONGARM_GPIO(obj) \
 467     OBJECT_CHECK(StrongARMGPIOInfo, (obj), TYPE_STRONGARM_GPIO)
 468
 469 typedef struct StrongARMGPIOInfo StrongARMGPIOInfo;
 470 struct StrongARMGPIOInfo {
 471     SysBusDevice busdev;
 472     MemoryRegion iomem;
 473     qemu_irq handler[28];
 474     qemu_irq irqs[11];
 475     qemu_irq irqX;
 476
 477     uint32_t ilevel;
 478     uint32_t olevel;
 479     uint32_t dir;
 480     uint32_t rising;
 481     uint32_t falling;
 482     uint32_t status;
 483     uint32_t gpsr;
 484     uint32_t gafr;
 485
 486     uint32_t prev_level;
 487 };
 488
 489
 490 static void strongarm_gpio_irq_update(StrongARMGPIOInfo *s)
 491 {
 492     int i;
 493     for (i = 0; i < 11; i++) {
 494         qemu_set_irq(s->irqs[i], s->status & (1 << i));
 495     }
 496
 497     qemu_set_irq(s->irqX, (s->status & ~0x7ff));
 498 }
 499
 500 static void strongarm_gpio_set(void *opaque, int line, int level)
 501 {
 502     StrongARMGPIOInfo *s = opaque;
 503     uint32_t mask;
 504
 505     mask = 1 << line;
 506
 507     if (level) {
 508         s->status |= s->rising & mask &
 509                 ~s->ilevel & ~s->dir;
 510         s->ilevel |= mask;
 511     } else {
 512         s->status |= s->falling & mask &
 513                 s->ilevel & ~s->dir;
 514         s->ilevel &= ~mask;
 515     }
 516
 517     if (s->status & mask) {
 518         strongarm_gpio_irq_update(s);
 519     }
 520 }
 521
 522 static void strongarm_gpio_handler_update(StrongARMGPIOInfo *s)
 523 {
 524     uint32_t level, diff;
 525     int bit;
 526
 527     level = s->olevel & s->dir;
 528
 529     for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
 530         bit = ffs(diff) - 1;
 531         qemu_set_irq(s->handler[bit], (level >> bit) & 1);
 532     }
 533
 534     s->prev_level = level;
 535 }
 536
 537 static uint64_t strongarm_gpio_read(void *opaque, hwaddr offset,
 538                                     unsigned size)
 539 {
 540     StrongARMGPIOInfo *s = opaque;
 541
 542     switch (offset) {
 543     case GPDR:        /* GPIO Pin-Direction registers */
 544         return s->dir;
 545
 546     case GPSR:        /* GPIO Pin-Output Set registers */
 547         DPRINTF("%s: Read from a write-only register 0x" TARGET_FMT_plx "\n",
 548                         __func__, offset);
 549         return s->gpsr;    /* Return last written value.  */
 550
 551     case GPCR:        /* GPIO Pin-Output Clear registers */
 552         DPRINTF("%s: Read from a write-only register 0x" TARGET_FMT_plx "\n",
 553                         __func__, offset);
 554         return 31337;        /* Specified as unpredictable in the docs.  */
 555
 556     case GRER:        /* GPIO Rising-Edge Detect Enable registers */
 557         return s->rising;
 558
 559     case GFER:        /* GPIO Falling-Edge Detect Enable registers */
 560         return s->falling;
 561
 562     case GAFR:        /* GPIO Alternate Function registers */
 563         return s->gafr;
 564
 565     case GPLR:        /* GPIO Pin-Level registers */
 566         return (s->olevel & s->dir) |
 567                (s->ilevel & ~s->dir);
 568
 569     case GEDR:        /* GPIO Edge Detect Status registers */
 570         return s->status;
 571
 572     default:
 573         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 574     }
 575
 576     return 0;
 577 }
 578
 579 static void strongarm_gpio_write(void *opaque, hwaddr offset,
 580                                  uint64_t value, unsigned size)
 581 {
 582     StrongARMGPIOInfo *s = opaque;
 583
 584     switch (offset) {
 585     case GPDR:        /* GPIO Pin-Direction registers */
 586         s->dir = value;
 587         strongarm_gpio_handler_update(s);
 588         break;
 589
 590     case GPSR:        /* GPIO Pin-Output Set registers */
 591         s->olevel |= value;
 592         strongarm_gpio_handler_update(s);
 593         s->gpsr = value;
 594         break;
 595
 596     case GPCR:        /* GPIO Pin-Output Clear registers */
 597         s->olevel &= ~value;
 598         strongarm_gpio_handler_update(s);
 599         break;
 600
 601     case GRER:        /* GPIO Rising-Edge Detect Enable registers */
 602         s->rising = value;
 603         break;
 604
 605     case GFER:        /* GPIO Falling-Edge Detect Enable registers */
 606         s->falling = value;
 607         break;
 608
 609     case GAFR:        /* GPIO Alternate Function registers */
 610         s->gafr = value;
 611         break;
 612
 613     case GEDR:        /* GPIO Edge Detect Status registers */
 614         s->status &= ~value;
 615         strongarm_gpio_irq_update(s);
 616         break;
 617
 618     default:
 619         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 620     }
 621 }
 622
 623 static const MemoryRegionOps strongarm_gpio_ops = {
 624     .read = strongarm_gpio_read,
 625     .write = strongarm_gpio_write,
 626     .endianness = DEVICE_NATIVE_ENDIAN,
 627 };
 628
 629 static DeviceState *strongarm_gpio_init(hwaddr base,
 630                 DeviceState *pic)
 631 {
 632     DeviceState *dev;
 633     int i;
 634
 635     dev = qdev_create(NULL, TYPE_STRONGARM_GPIO);
 636     qdev_init_nofail(dev);
 637
 638     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
 639     for (i = 0; i < 12; i++)
 640         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
 641                     qdev_get_gpio_in(pic, SA_PIC_GPIO0_EDGE + i));
 642
 643     return dev;
 644 }
 645
 646 static int strongarm_gpio_initfn(SysBusDevice *sbd)
 647 {
 648     DeviceState *dev = DEVICE(sbd);
 649     StrongARMGPIOInfo *s = STRONGARM_GPIO(dev);
 650     int i;
 651
 652     qdev_init_gpio_in(dev, strongarm_gpio_set, 28);
 653     qdev_init_gpio_out(dev, s->handler, 28);
 654
 655     memory_region_init_io(&s->iomem, OBJECT(s), &strongarm_gpio_ops, s,
 656                           "gpio", 0x1000);
 657
 658     sysbus_init_mmio(sbd, &s->iomem);
 659     for (i = 0; i < 11; i++) {
 660         sysbus_init_irq(sbd, &s->irqs[i]);
 661     }
 662     sysbus_init_irq(sbd, &s->irqX);
 663
 664     return 0;
 665 }
 666
 667 static const VMStateDescription vmstate_strongarm_gpio_regs = {
 668     .name = "strongarm-gpio",
 669     .version_id = 0,
 670     .minimum_version_id = 0,
 671     .fields = (VMStateField[]) {
 672         VMSTATE_UINT32(ilevel, StrongARMGPIOInfo),
 673         VMSTATE_UINT32(olevel, StrongARMGPIOInfo),
 674         VMSTATE_UINT32(dir, StrongARMGPIOInfo),
 675         VMSTATE_UINT32(rising, StrongARMGPIOInfo),
 676         VMSTATE_UINT32(falling, StrongARMGPIOInfo),
 677         VMSTATE_UINT32(status, StrongARMGPIOInfo),
 678         VMSTATE_UINT32(gafr, StrongARMGPIOInfo),
 679         VMSTATE_END_OF_LIST(),
 680     },
 681 };
 682
 683 static void strongarm_gpio_class_init(ObjectClass *klass, void *data)
 684 {
 685     DeviceClass *dc = DEVICE_CLASS(klass);
 686     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 687
 688     k->init = strongarm_gpio_initfn;
 689     dc->desc = "StrongARM GPIO controller";
 690 }
 691
 692 static const TypeInfo strongarm_gpio_info = {
 693     .name          = TYPE_STRONGARM_GPIO,
 694     .parent        = TYPE_SYS_BUS_DEVICE,
 695     .instance_size = sizeof(StrongARMGPIOInfo),
 696     .class_init    = strongarm_gpio_class_init,
 697 };
 698
 699 /* Peripheral Pin Controller */
 700 #define PPDR 0x00
 701 #define PPSR 0x04
 702 #define PPAR 0x08
 703 #define PSDR 0x0c
 704 #define PPFR 0x10
 705
 706 #define TYPE_STRONGARM_PPC "strongarm-ppc"
 707 #define STRONGARM_PPC(obj) \
 708     OBJECT_CHECK(StrongARMPPCInfo, (obj), TYPE_STRONGARM_PPC)
 709
 710 typedef struct StrongARMPPCInfo StrongARMPPCInfo;
 711 struct StrongARMPPCInfo {
 712     SysBusDevice parent_obj;
 713
 714     MemoryRegion iomem;
 715     qemu_irq handler[28];
 716
 717     uint32_t ilevel;
 718     uint32_t olevel;
 719     uint32_t dir;
 720     uint32_t ppar;
 721     uint32_t psdr;
 722     uint32_t ppfr;
 723
 724     uint32_t prev_level;
 725 };
 726
 727 static void strongarm_ppc_set(void *opaque, int line, int level)
 728 {
 729     StrongARMPPCInfo *s = opaque;
 730
 731     if (level) {
 732         s->ilevel |= 1 << line;
 733     } else {
 734         s->ilevel &= ~(1 << line);
 735     }
 736 }
 737
 738 static void strongarm_ppc_handler_update(StrongARMPPCInfo *s)
 739 {
 740     uint32_t level, diff;
 741     int bit;
 742
 743     level = s->olevel & s->dir;
 744
 745     for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
 746         bit = ffs(diff) - 1;
 747         qemu_set_irq(s->handler[bit], (level >> bit) & 1);
 748     }
 749
 750     s->prev_level = level;
 751 }
 752
 753 static uint64_t strongarm_ppc_read(void *opaque, hwaddr offset,
 754                                    unsigned size)
 755 {
 756     StrongARMPPCInfo *s = opaque;
 757
 758     switch (offset) {
 759     case PPDR:        /* PPC Pin Direction registers */
 760         return s->dir | ~0x3fffff;
 761
 762     case PPSR:        /* PPC Pin State registers */
 763         return (s->olevel & s->dir) |
 764                (s->ilevel & ~s->dir) |
 765                ~0x3fffff;
 766
 767     case PPAR:
 768         return s->ppar | ~0x41000;
 769
 770     case PSDR:
 771         return s->psdr;
 772
 773     case PPFR:
 774         return s->ppfr | ~0x7f001;
 775
 776     default:
 777         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 778     }
 779
 780     return 0;
 781 }
 782
 783 static void strongarm_ppc_write(void *opaque, hwaddr offset,
 784                                 uint64_t value, unsigned size)
 785 {
 786     StrongARMPPCInfo *s = opaque;
 787
 788     switch (offset) {
 789     case PPDR:        /* PPC Pin Direction registers */
 790         s->dir = value & 0x3fffff;
 791         strongarm_ppc_handler_update(s);
 792         break;
 793
 794     case PPSR:        /* PPC Pin State registers */
 795         s->olevel = value & s->dir & 0x3fffff;
 796         strongarm_ppc_handler_update(s);
 797         break;
 798
 799     case PPAR:
 800         s->ppar = value & 0x41000;
 801         break;
 802
 803     case PSDR:
 804         s->psdr = value & 0x3fffff;
 805         break;
 806
 807     case PPFR:
 808         s->ppfr = value & 0x7f001;
 809         break;
 810
 811     default:
 812         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 813     }
 814 }
 815
 816 static const MemoryRegionOps strongarm_ppc_ops = {
 817     .read = strongarm_ppc_read,
 818     .write = strongarm_ppc_write,
 819     .endianness = DEVICE_NATIVE_ENDIAN,
 820 };
 821
 822 static int strongarm_ppc_init(SysBusDevice *sbd)
 823 {
 824     DeviceState *dev = DEVICE(sbd);
 825     StrongARMPPCInfo *s = STRONGARM_PPC(dev);
 826
 827     qdev_init_gpio_in(dev, strongarm_ppc_set, 22);
 828     qdev_init_gpio_out(dev, s->handler, 22);
 829
 830     memory_region_init_io(&s->iomem, OBJECT(s), &strongarm_ppc_ops, s,
 831                           "ppc", 0x1000);
 832
 833     sysbus_init_mmio(sbd, &s->iomem);
 834
 835     return 0;
 836 }
 837
 838 static const VMStateDescription vmstate_strongarm_ppc_regs = {
 839     .name = "strongarm-ppc",
 840     .version_id = 0,
 841     .minimum_version_id = 0,
 842     .fields = (VMStateField[]) {
 843         VMSTATE_UINT32(ilevel, StrongARMPPCInfo),
 844         VMSTATE_UINT32(olevel, StrongARMPPCInfo),
 845         VMSTATE_UINT32(dir, StrongARMPPCInfo),
 846         VMSTATE_UINT32(ppar, StrongARMPPCInfo),
 847         VMSTATE_UINT32(psdr, StrongARMPPCInfo),
 848         VMSTATE_UINT32(ppfr, StrongARMPPCInfo),
 849         VMSTATE_END_OF_LIST(),
 850     },
 851 };
 852
 853 static void strongarm_ppc_class_init(ObjectClass *klass, void *data)
 854 {
 855     DeviceClass *dc = DEVICE_CLASS(klass);
 856     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 857
 858     k->init = strongarm_ppc_init;
 859     dc->desc = "StrongARM PPC controller";
 860 }
 861
 862 static const TypeInfo strongarm_ppc_info = {
 863     .name          = TYPE_STRONGARM_PPC,
 864     .parent        = TYPE_SYS_BUS_DEVICE,
 865     .instance_size = sizeof(StrongARMPPCInfo),
 866     .class_init    = strongarm_ppc_class_init,
 867 };
 868
 869 /* UART Ports */
 870 #define UTCR0 0x00
 871 #define UTCR1 0x04
 872 #define UTCR2 0x08
 873 #define UTCR3 0x0c
 874 #define UTDR  0x14
 875 #define UTSR0 0x1c
 876 #define UTSR1 0x20
 877
 878 #define UTCR0_PE  (1 << 0) /* Parity enable */
 879 #define UTCR0_OES (1 << 1) /* Even parity */
 880 #define UTCR0_SBS (1 << 2) /* 2 stop bits */
 881 #define UTCR0_DSS (1 << 3) /* 8-bit data */
 882
 883 #define UTCR3_RXE (1 << 0) /* Rx enable */
 884 #define UTCR3_TXE (1 << 1) /* Tx enable */
 885 #define UTCR3_BRK (1 << 2) /* Force Break */
 886 #define UTCR3_RIE (1 << 3) /* Rx int enable */
 887 #define UTCR3_TIE (1 << 4) /* Tx int enable */
 888 #define UTCR3_LBM (1 << 5) /* Loopback */
 889
 890 #define UTSR0_TFS (1 << 0) /* Tx FIFO nearly empty */
 891 #define UTSR0_RFS (1 << 1) /* Rx FIFO nearly full */
 892 #define UTSR0_RID (1 << 2) /* Receiver Idle */
 893 #define UTSR0_RBB (1 << 3) /* Receiver begin break */
 894 #define UTSR0_REB (1 << 4) /* Receiver end break */
 895 #define UTSR0_EIF (1 << 5) /* Error in FIFO */
 896
 897 #define UTSR1_RNE (1 << 1) /* Receive FIFO not empty */
 898 #define UTSR1_TNF (1 << 2) /* Transmit FIFO not full */
 899 #define UTSR1_PRE (1 << 3) /* Parity error */
 900 #define UTSR1_FRE (1 << 4) /* Frame error */
 901 #define UTSR1_ROR (1 << 5) /* Receive Over Run */
 902
 903 #define RX_FIFO_PRE (1 << 8)
 904 #define RX_FIFO_FRE (1 << 9)
 905 #define RX_FIFO_ROR (1 << 10)
 906
 907 #define TYPE_STRONGARM_UART "strongarm-uart"
 908 #define STRONGARM_UART(obj) \
 909     OBJECT_CHECK(StrongARMUARTState, (obj), TYPE_STRONGARM_UART)
 910
 911 typedef struct StrongARMUARTState {
 912     SysBusDevice parent_obj;
 913
 914     MemoryRegion iomem;
 915     CharDriverState *chr;
 916     qemu_irq irq;
 917
 918     uint8_t utcr0;
 919     uint16_t brd;
 920     uint8_t utcr3;
 921     uint8_t utsr0;
 922     uint8_t utsr1;
 923
 924     uint8_t tx_fifo[8];
 925     uint8_t tx_start;
 926     uint8_t tx_len;
 927     uint16_t rx_fifo[12]; /* value + error flags in high bits */
 928     uint8_t rx_start;
 929     uint8_t rx_len;
 930
 931     uint64_t char_transmit_time; /* time to transmit a char in ticks*/
 932     bool wait_break_end;
 933     QEMUTimer *rx_timeout_timer;
 934     QEMUTimer *tx_timer;
 935 } StrongARMUARTState;
 936
 937 static void strongarm_uart_update_status(StrongARMUARTState *s)
 938 {
 939     uint16_t utsr1 = 0;
 940
 941     if (s->tx_len != 8) {
 942         utsr1 |= UTSR1_TNF;
 943     }
 944
 945     if (s->rx_len != 0) {
 946         uint16_t ent = s->rx_fifo[s->rx_start];
 947
 948         utsr1 |= UTSR1_RNE;
 949         if (ent & RX_FIFO_PRE) {
 950             s->utsr1 |= UTSR1_PRE;
 951         }
 952         if (ent & RX_FIFO_FRE) {
 953             s->utsr1 |= UTSR1_FRE;
 954         }
 955         if (ent & RX_FIFO_ROR) {
 956             s->utsr1 |= UTSR1_ROR;
 957         }
 958     }
 959
 960     s->utsr1 = utsr1;
 961 }
 962
 963 static void strongarm_uart_update_int_status(StrongARMUARTState *s)
 964 {
 965     uint16_t utsr0 = s->utsr0 &
 966             (UTSR0_REB | UTSR0_RBB | UTSR0_RID);
 967     int i;
 968
 969     if ((s->utcr3 & UTCR3_TXE) &&
 970                 (s->utcr3 & UTCR3_TIE) &&
 971                 s->tx_len <= 4) {
 972         utsr0 |= UTSR0_TFS;
 973     }
 974
 975     if ((s->utcr3 & UTCR3_RXE) &&
 976                 (s->utcr3 & UTCR3_RIE) &&
 977                 s->rx_len > 4) {
 978         utsr0 |= UTSR0_RFS;
 979     }
 980
 981     for (i = 0; i < s->rx_len && i < 4; i++)
 982         if (s->rx_fifo[(s->rx_start + i) % 12] & ~0xff) {
 983             utsr0 |= UTSR0_EIF;
 984             break;
 985         }
 986
 987     s->utsr0 = utsr0;
 988     qemu_set_irq(s->irq, utsr0);
 989 }
 990
 991 static void strongarm_uart_update_parameters(StrongARMUARTState *s)
 992 {
 993     int speed, parity, data_bits, stop_bits, frame_size;
 994     QEMUSerialSetParams ssp;
 995
 996     /* Start bit. */
 997     frame_size = 1;
 998     if (s->utcr0 & UTCR0_PE) {
 999         /* Parity bit. */
1000         frame_size++;
1001         if (s->utcr0 & UTCR0_OES) {
1002             parity = 'E';
1003         } else {
1004             parity = 'O';
1005         }
1006     } else {
1007             parity = 'N';
1008     }
1009     if (s->utcr0 & UTCR0_SBS) {
1010         stop_bits = 2;
1011     } else {
1012         stop_bits = 1;
1013     }
1014
1015     data_bits = (s->utcr0 & UTCR0_DSS) ? 8 : 7;
1016     frame_size += data_bits + stop_bits;
1017     speed = 3686400 / 16 / (s->brd + 1);
1018     ssp.speed = speed;
1019     ssp.parity = parity;
1020     ssp.data_bits = data_bits;
1021     ssp.stop_bits = stop_bits;
1022     s->char_transmit_time =  (get_ticks_per_sec() / speed) * frame_size;
1023     if (s->chr) {
1024         qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
1025     }
1026
1027     DPRINTF(stderr, "%s speed=%d parity=%c data=%d stop=%d\n", s->chr->label,
1028             speed, parity, data_bits, stop_bits);
1029 }
1030
1031 static void strongarm_uart_rx_to(void *opaque)
1032 {
1033     StrongARMUARTState *s = opaque;
1034
1035     if (s->rx_len) {
1036         s->utsr0 |= UTSR0_RID;
1037         strongarm_uart_update_int_status(s);
1038     }
1039 }
1040
1041 static void strongarm_uart_rx_push(StrongARMUARTState *s, uint16_t c)
1042 {
1043     if ((s->utcr3 & UTCR3_RXE) == 0) {
1044         /* rx disabled */
1045         return;
1046     }
1047
1048     if (s->wait_break_end) {
1049         s->utsr0 |= UTSR0_REB;
1050         s->wait_break_end = false;
1051     }
1052
1053     if (s->rx_len < 12) {
1054         s->rx_fifo[(s->rx_start + s->rx_len) % 12] = c;
1055         s->rx_len++;
1056     } else
1057         s->rx_fifo[(s->rx_start + 11) % 12] |= RX_FIFO_ROR;
1058 }
1059
1060 static int strongarm_uart_can_receive(void *opaque)
1061 {
1062     StrongARMUARTState *s = opaque;
1063
1064     if (s->rx_len == 12) {
1065         return 0;
1066     }
1067     /* It's best not to get more than 2/3 of RX FIFO, so advertise that much */
1068     if (s->rx_len < 8) {
1069         return 8 - s->rx_len;
1070     }
1071     return 1;
1072 }
1073
1074 static void strongarm_uart_receive(void *opaque, const uint8_t *buf, int size)
1075 {
1076     StrongARMUARTState *s = opaque;
1077     int i;
1078
1079     for (i = 0; i < size; i++) {
1080         strongarm_uart_rx_push(s, buf[i]);
1081     }
1082
1083     /* call the timeout receive callback in 3 char transmit time */
1084     timer_mod(s->rx_timeout_timer,
1085                     qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time * 3);
1086
1087     strongarm_uart_update_status(s);
1088     strongarm_uart_update_int_status(s);
1089 }
1090
1091 static void strongarm_uart_event(void *opaque, int event)
1092 {
1093     StrongARMUARTState *s = opaque;
1094     if (event == CHR_EVENT_BREAK) {
1095         s->utsr0 |= UTSR0_RBB;
1096         strongarm_uart_rx_push(s, RX_FIFO_FRE);
1097         s->wait_break_end = true;
1098         strongarm_uart_update_status(s);
1099         strongarm_uart_update_int_status(s);
1100     }
1101 }
1102
1103 static void strongarm_uart_tx(void *opaque)
1104 {
1105     StrongARMUARTState *s = opaque;
1106     uint64_t new_xmit_ts = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1107
1108     if (s->utcr3 & UTCR3_LBM) /* loopback */ {
1109         strongarm_uart_receive(s, &s->tx_fifo[s->tx_start], 1);
1110     } else if (s->chr) {
1111         qemu_chr_fe_write(s->chr, &s->tx_fifo[s->tx_start], 1);
1112     }
1113
1114     s->tx_start = (s->tx_start + 1) % 8;
1115     s->tx_len--;
1116     if (s->tx_len) {
1117         timer_mod(s->tx_timer, new_xmit_ts + s->char_transmit_time);
1118     }
1119     strongarm_uart_update_status(s);
1120     strongarm_uart_update_int_status(s);
1121 }
1122
1123 static uint64_t strongarm_uart_read(void *opaque, hwaddr addr,
1124                                     unsigned size)
1125 {
1126     StrongARMUARTState *s = opaque;
1127     uint16_t ret;
1128
1129     switch (addr) {
1130     case UTCR0:
1131         return s->utcr0;
1132
1133     case UTCR1:
1134         return s->brd >> 8;
1135
1136     case UTCR2:
1137         return s->brd & 0xff;
1138
1139     case UTCR3:
1140         return s->utcr3;
1141
1142     case UTDR:
1143         if (s->rx_len != 0) {
1144             ret = s->rx_fifo[s->rx_start];
1145             s->rx_start = (s->rx_start + 1) % 12;
1146             s->rx_len--;
1147             strongarm_uart_update_status(s);
1148             strongarm_uart_update_int_status(s);
1149             return ret;
1150         }
1151         return 0;
1152
1153     case UTSR0:
1154         return s->utsr0;
1155
1156     case UTSR1:
1157         return s->utsr1;
1158
1159     default:
1160         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1161         return 0;
1162     }
1163 }
1164
1165 static void strongarm_uart_write(void *opaque, hwaddr addr,
1166                                  uint64_t value, unsigned size)
1167 {
1168     StrongARMUARTState *s = opaque;
1169
1170     switch (addr) {
1171     case UTCR0:
1172         s->utcr0 = value & 0x7f;
1173         strongarm_uart_update_parameters(s);
1174         break;
1175
1176     case UTCR1:
1177         s->brd = (s->brd & 0xff) | ((value & 0xf) << 8);
1178         strongarm_uart_update_parameters(s);
1179         break;
1180
1181     case UTCR2:
1182         s->brd = (s->brd & 0xf00) | (value & 0xff);
1183         strongarm_uart_update_parameters(s);
1184         break;
1185
1186     case UTCR3:
1187         s->utcr3 = value & 0x3f;
1188         if ((s->utcr3 & UTCR3_RXE) == 0) {
1189             s->rx_len = 0;
1190         }
1191         if ((s->utcr3 & UTCR3_TXE) == 0) {
1192             s->tx_len = 0;
1193         }
1194         strongarm_uart_update_status(s);
1195         strongarm_uart_update_int_status(s);
1196         break;
1197
1198     case UTDR:
1199         if ((s->utcr3 & UTCR3_TXE) && s->tx_len != 8) {
1200             s->tx_fifo[(s->tx_start + s->tx_len) % 8] = value;
1201             s->tx_len++;
1202             strongarm_uart_update_status(s);
1203             strongarm_uart_update_int_status(s);
1204             if (s->tx_len == 1) {
1205                 strongarm_uart_tx(s);
1206             }
1207         }
1208         break;
1209
1210     case UTSR0:
1211         s->utsr0 = s->utsr0 & ~(value &
1212                 (UTSR0_REB | UTSR0_RBB | UTSR0_RID));
1213         strongarm_uart_update_int_status(s);
1214         break;
1215
1216     default:
1217         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1218     }
1219 }
1220
1221 static const MemoryRegionOps strongarm_uart_ops = {
1222     .read = strongarm_uart_read,
1223     .write = strongarm_uart_write,
1224     .endianness = DEVICE_NATIVE_ENDIAN,
1225 };
1226
1227 static int strongarm_uart_init(SysBusDevice *dev)
1228 {
1229     StrongARMUARTState *s = STRONGARM_UART(dev);
1230
1231     memory_region_init_io(&s->iomem, OBJECT(s), &strongarm_uart_ops, s,
1232                           "uart", 0x10000);
1233     sysbus_init_mmio(dev, &s->iomem);
1234     sysbus_init_irq(dev, &s->irq);
1235
1236     s->rx_timeout_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, strongarm_uart_rx_to, s);
1237     s->tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, strongarm_uart_tx, s);
1238
1239     if (s->chr) {
1240         qemu_chr_add_handlers(s->chr,
1241                         strongarm_uart_can_receive,
1242                         strongarm_uart_receive,
1243                         strongarm_uart_event,
1244                         s);
1245     }
1246
1247     return 0;
1248 }
1249
1250 static void strongarm_uart_reset(DeviceState *dev)
1251 {
1252     StrongARMUARTState *s = STRONGARM_UART(dev);
1253
1254     s->utcr0 = UTCR0_DSS; /* 8 data, no parity */
1255     s->brd = 23;    /* 9600 */
1256     /* enable send & recv - this actually violates spec */
1257     s->utcr3 = UTCR3_TXE | UTCR3_RXE;
1258
1259     s->rx_len = s->tx_len = 0;
1260
1261     strongarm_uart_update_parameters(s);
1262     strongarm_uart_update_status(s);
1263     strongarm_uart_update_int_status(s);
1264 }
1265
1266 static int strongarm_uart_post_load(void *opaque, int version_id)
1267 {
1268     StrongARMUARTState *s = opaque;
1269
1270     strongarm_uart_update_parameters(s);
1271     strongarm_uart_update_status(s);
1272     strongarm_uart_update_int_status(s);
1273
1274     /* tx and restart timer */
1275     if (s->tx_len) {
1276         strongarm_uart_tx(s);
1277     }
1278
1279     /* restart rx timeout timer */
1280     if (s->rx_len) {
1281         timer_mod(s->rx_timeout_timer,
1282                 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time * 3);
1283     }
1284
1285     return 0;
1286 }
1287
1288 static const VMStateDescription vmstate_strongarm_uart_regs = {
1289     .name = "strongarm-uart",
1290     .version_id = 0,
1291     .minimum_version_id = 0,
1292     .post_load = strongarm_uart_post_load,
1293     .fields = (VMStateField[]) {
1294         VMSTATE_UINT8(utcr0, StrongARMUARTState),
1295         VMSTATE_UINT16(brd, StrongARMUARTState),
1296         VMSTATE_UINT8(utcr3, StrongARMUARTState),
1297         VMSTATE_UINT8(utsr0, StrongARMUARTState),
1298         VMSTATE_UINT8_ARRAY(tx_fifo, StrongARMUARTState, 8),
1299         VMSTATE_UINT8(tx_start, StrongARMUARTState),
1300         VMSTATE_UINT8(tx_len, StrongARMUARTState),
1301         VMSTATE_UINT16_ARRAY(rx_fifo, StrongARMUARTState, 12),
1302         VMSTATE_UINT8(rx_start, StrongARMUARTState),
1303         VMSTATE_UINT8(rx_len, StrongARMUARTState),
1304         VMSTATE_BOOL(wait_break_end, StrongARMUARTState),
1305         VMSTATE_END_OF_LIST(),
1306     },
1307 };
1308
1309 static Property strongarm_uart_properties[] = {
1310     DEFINE_PROP_CHR("chardev", StrongARMUARTState, chr),
1311     DEFINE_PROP_END_OF_LIST(),
1312 };
1313
1314 static void strongarm_uart_class_init(ObjectClass *klass, void *data)
1315 {
1316     DeviceClass *dc = DEVICE_CLASS(klass);
1317     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1318
1319     k->init = strongarm_uart_init;
1320     dc->desc = "StrongARM UART controller";
1321     dc->reset = strongarm_uart_reset;
1322     dc->vmsd = &vmstate_strongarm_uart_regs;
1323     dc->props = strongarm_uart_properties;
1324 }
1325
1326 static const TypeInfo strongarm_uart_info = {
1327     .name          = TYPE_STRONGARM_UART,
1328     .parent        = TYPE_SYS_BUS_DEVICE,
1329     .instance_size = sizeof(StrongARMUARTState),
1330     .class_init    = strongarm_uart_class_init,
1331 };
1332
1333 /* Synchronous Serial Ports */
1334
1335 #define TYPE_STRONGARM_SSP "strongarm-ssp"
1336 #define STRONGARM_SSP(obj) \
1337     OBJECT_CHECK(StrongARMSSPState, (obj), TYPE_STRONGARM_SSP)
1338
1339 typedef struct StrongARMSSPState {
1340     SysBusDevice parent_obj;
1341
1342     MemoryRegion iomem;
1343     qemu_irq irq;
1344     SSIBus *bus;
1345
1346     uint16_t sscr[2];
1347     uint16_t sssr;
1348
1349     uint16_t rx_fifo[8];
1350     uint8_t rx_level;
1351     uint8_t rx_start;
1352 } StrongARMSSPState;
1353
1354 #define SSCR0 0x60 /* SSP Control register 0 */
1355 #define SSCR1 0x64 /* SSP Control register 1 */
1356 #define SSDR  0x6c /* SSP Data register */
1357 #define SSSR  0x74 /* SSP Status register */
1358
1359 /* Bitfields for above registers */
1360 #define SSCR0_SPI(x)    (((x) & 0x30) == 0x00)
1361 #define SSCR0_SSP(x)    (((x) & 0x30) == 0x10)
1362 #define SSCR0_UWIRE(x)  (((x) & 0x30) == 0x20)
1363 #define SSCR0_PSP(x)    (((x) & 0x30) == 0x30)
1364 #define SSCR0_SSE       (1 << 7)
1365 #define SSCR0_DSS(x)    (((x) & 0xf) + 1)
1366 #define SSCR1_RIE       (1 << 0)
1367 #define SSCR1_TIE       (1 << 1)
1368 #define SSCR1_LBM       (1 << 2)
1369 #define SSSR_TNF        (1 << 2)
1370 #define SSSR_RNE        (1 << 3)
1371 #define SSSR_TFS        (1 << 5)
1372 #define SSSR_RFS        (1 << 6)
1373 #define SSSR_ROR        (1 << 7)
1374 #define SSSR_RW         0x0080
1375
1376 static void strongarm_ssp_int_update(StrongARMSSPState *s)
1377 {
1378     int level = 0;
1379
1380     level |= (s->sssr & SSSR_ROR);
1381     level |= (s->sssr & SSSR_RFS)  &&  (s->sscr[1] & SSCR1_RIE);
1382     level |= (s->sssr & SSSR_TFS)  &&  (s->sscr[1] & SSCR1_TIE);
1383     qemu_set_irq(s->irq, level);
1384 }
1385
1386 static void strongarm_ssp_fifo_update(StrongARMSSPState *s)
1387 {
1388     s->sssr &= ~SSSR_TFS;
1389     s->sssr &= ~SSSR_TNF;
1390     if (s->sscr[0] & SSCR0_SSE) {
1391         if (s->rx_level >= 4) {
1392             s->sssr |= SSSR_RFS;
1393         } else {
1394             s->sssr &= ~SSSR_RFS;
1395         }
1396         if (s->rx_level) {
1397             s->sssr |= SSSR_RNE;
1398         } else {
1399             s->sssr &= ~SSSR_RNE;
1400         }
1401         /* TX FIFO is never filled, so it is always in underrun
1402            condition if SSP is enabled */
1403         s->sssr |= SSSR_TFS;
1404         s->sssr |= SSSR_TNF;
1405     }
1406
1407     strongarm_ssp_int_update(s);
1408 }
1409
1410 static uint64_t strongarm_ssp_read(void *opaque, hwaddr addr,
1411                                    unsigned size)
1412 {
1413     StrongARMSSPState *s = opaque;
1414     uint32_t retval;
1415
1416     switch (addr) {
1417     case SSCR0:
1418         return s->sscr[0];
1419     case SSCR1:
1420         return s->sscr[1];
1421     case SSSR:
1422         return s->sssr;
1423     case SSDR:
1424         if (~s->sscr[0] & SSCR0_SSE) {
1425             return 0xffffffff;
1426         }
1427         if (s->rx_level < 1) {
1428             printf("%s: SSP Rx Underrun\n", __func__);
1429             return 0xffffffff;
1430         }
1431         s->rx_level--;
1432         retval = s->rx_fifo[s->rx_start++];
1433         s->rx_start &= 0x7;
1434         strongarm_ssp_fifo_update(s);
1435         return retval;
1436     default:
1437         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1438         break;
1439     }
1440     return 0;
1441 }
1442
1443 static void strongarm_ssp_write(void *opaque, hwaddr addr,
1444                                 uint64_t value, unsigned size)
1445 {
1446     StrongARMSSPState *s = opaque;
1447
1448     switch (addr) {
1449     case SSCR0:
1450         s->sscr[0] = value & 0xffbf;
1451         if ((s->sscr[0] & SSCR0_SSE) && SSCR0_DSS(value) < 4) {
1452             printf("%s: Wrong data size: %i bits\n", __func__,
1453                    (int)SSCR0_DSS(value));
1454         }
1455         if (!(value & SSCR0_SSE)) {
1456             s->sssr = 0;
1457             s->rx_level = 0;
1458         }
1459         strongarm_ssp_fifo_update(s);
1460         break;
1461
1462     case SSCR1:
1463         s->sscr[1] = value & 0x2f;
1464         if (value & SSCR1_LBM) {
1465             printf("%s: Attempt to use SSP LBM mode\n", __func__);
1466         }
1467         strongarm_ssp_fifo_update(s);
1468         break;
1469
1470     case SSSR:
1471         s->sssr &= ~(value & SSSR_RW);
1472         strongarm_ssp_int_update(s);
1473         break;
1474
1475     case SSDR:
1476         if (SSCR0_UWIRE(s->sscr[0])) {
1477             value &= 0xff;
1478         } else
1479             /* Note how 32bits overflow does no harm here */
1480             value &= (1 << SSCR0_DSS(s->sscr[0])) - 1;
1481
1482         /* Data goes from here to the Tx FIFO and is shifted out from
1483          * there directly to the slave, no need to buffer it.
1484          */
1485         if (s->sscr[0] & SSCR0_SSE) {
1486             uint32_t readval;
1487             if (s->sscr[1] & SSCR1_LBM) {
1488                 readval = value;
1489             } else {
1490                 readval = ssi_transfer(s->bus, value);
1491             }
1492
1493             if (s->rx_level < 0x08) {
1494                 s->rx_fifo[(s->rx_start + s->rx_level++) & 0x7] = readval;
1495             } else {
1496                 s->sssr |= SSSR_ROR;
1497             }
1498         }
1499         strongarm_ssp_fifo_update(s);
1500         break;
1501
1502     default:
1503         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1504         break;
1505     }
1506 }
1507
1508 static const MemoryRegionOps strongarm_ssp_ops = {
1509     .read = strongarm_ssp_read,
1510     .write = strongarm_ssp_write,
1511     .endianness = DEVICE_NATIVE_ENDIAN,
1512 };
1513
1514 static int strongarm_ssp_post_load(void *opaque, int version_id)
1515 {
1516     StrongARMSSPState *s = opaque;
1517
1518     strongarm_ssp_fifo_update(s);
1519
1520     return 0;
1521 }
1522
1523 static int strongarm_ssp_init(SysBusDevice *sbd)
1524 {
1525     DeviceState *dev = DEVICE(sbd);
1526     StrongARMSSPState *s = STRONGARM_SSP(dev);
1527
1528     sysbus_init_irq(sbd, &s->irq);
1529
1530     memory_region_init_io(&s->iomem, OBJECT(s), &strongarm_ssp_ops, s,
1531                           "ssp", 0x1000);
1532     sysbus_init_mmio(sbd, &s->iomem);
1533
1534     s->bus = ssi_create_bus(dev, "ssi");
1535     return 0;
1536 }
1537
1538 static void strongarm_ssp_reset(DeviceState *dev)
1539 {
1540     StrongARMSSPState *s = STRONGARM_SSP(dev);
1541
1542     s->sssr = 0x03; /* 3 bit data, SPI, disabled */
1543     s->rx_start = 0;
1544     s->rx_level = 0;
1545 }
1546
1547 static const VMStateDescription vmstate_strongarm_ssp_regs = {
1548     .name = "strongarm-ssp",
1549     .version_id = 0,
1550     .minimum_version_id = 0,
1551     .post_load = strongarm_ssp_post_load,
1552     .fields = (VMStateField[]) {
1553         VMSTATE_UINT16_ARRAY(sscr, StrongARMSSPState, 2),
1554         VMSTATE_UINT16(sssr, StrongARMSSPState),
1555         VMSTATE_UINT16_ARRAY(rx_fifo, StrongARMSSPState, 8),
1556         VMSTATE_UINT8(rx_start, StrongARMSSPState),
1557         VMSTATE_UINT8(rx_level, StrongARMSSPState),
1558         VMSTATE_END_OF_LIST(),
1559     },
1560 };
1561
1562 static void strongarm_ssp_class_init(ObjectClass *klass, void *data)
1563 {
1564     DeviceClass *dc = DEVICE_CLASS(klass);
1565     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1566
1567     k->init = strongarm_ssp_init;
1568     dc->desc = "StrongARM SSP controller";
1569     dc->reset = strongarm_ssp_reset;
1570     dc->vmsd = &vmstate_strongarm_ssp_regs;
1571 }
1572
1573 static const TypeInfo strongarm_ssp_info = {
1574     .name          = TYPE_STRONGARM_SSP,
1575     .parent        = TYPE_SYS_BUS_DEVICE,
1576     .instance_size = sizeof(StrongARMSSPState),
1577     .class_init    = strongarm_ssp_class_init,
1578 };
1579
1580 /* Main CPU functions */
1581 StrongARMState *sa1110_init(MemoryRegion *sysmem,
1582                             unsigned int sdram_size, const char *rev)
1583 {
1584     StrongARMState *s;
1585     int i;
1586
1587     s = g_malloc0(sizeof(StrongARMState));
1588
1589     if (!rev) {
1590         rev = "sa1110-b5";
1591     }
1592
1593     if (strncmp(rev, "sa1110", 6)) {
1594         error_report("Machine requires a SA1110 processor.");
1595         exit(1);
1596     }
1597
1598     s->cpu = cpu_arm_init(rev);
1599
1600     if (!s->cpu) {
1601         error_report("Unable to find CPU definition");
1602         exit(1);
1603     }
1604
1605     memory_region_init_ram(&s->sdram, NULL, "strongarm.sdram", sdram_size);
1606     vmstate_register_ram_global(&s->sdram);
1607     memory_region_add_subregion(sysmem, SA_SDCS0, &s->sdram);
1608
1609     s->pic = sysbus_create_varargs("strongarm_pic", 0x90050000,
1610                     qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ),
1611                     qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_FIQ),
1612                     NULL);
1613
1614     sysbus_create_varargs("pxa25x-timer", 0x90000000,
1615                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC0),
1616                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC1),
1617                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC2),
1618                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC3),
1619                     NULL);
1620
1621     sysbus_create_simple(TYPE_STRONGARM_RTC, 0x90010000,
1622                     qdev_get_gpio_in(s->pic, SA_PIC_RTC_ALARM));
1623
1624     s->gpio = strongarm_gpio_init(0x90040000, s->pic);
1625
1626     s->ppc = sysbus_create_varargs(TYPE_STRONGARM_PPC, 0x90060000, NULL);
1627
1628     for (i = 0; sa_serial[i].io_base; i++) {
1629         DeviceState *dev = qdev_create(NULL, TYPE_STRONGARM_UART);
1630         qdev_prop_set_chr(dev, "chardev", serial_hds[i]);
1631         qdev_init_nofail(dev);
1632         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0,
1633                 sa_serial[i].io_base);
1634         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
1635                 qdev_get_gpio_in(s->pic, sa_serial[i].irq));
1636     }
1637
1638     s->ssp = sysbus_create_varargs(TYPE_STRONGARM_SSP, 0x80070000,
1639                 qdev_get_gpio_in(s->pic, SA_PIC_SSP), NULL);
1640     s->ssp_bus = (SSIBus *)qdev_get_child_bus(s->ssp, "ssi");
1641
1642     return s;
1643 }
1644
1645 static void strongarm_register_types(void)
1646 {
1647     type_register_static(&strongarm_pic_info);
1648     type_register_static(&strongarm_rtc_sysbus_info);
1649     type_register_static(&strongarm_gpio_info);
1650     type_register_static(&strongarm_ppc_info);
1651     type_register_static(&strongarm_uart_info);
1652     type_register_static(&strongarm_ssp_info);
1653 }
1654
1655 type_init(strongarm_register_types)