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