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
  30 #include "qemu/osdep.h"
  31 #include "cpu.h"
  32 #include "hw/boards.h"
  33 #include "hw/sysbus.h"
  34 #include "strongarm.h"
  35 #include "qemu/error-report.h"
  36 #include "hw/arm/arm.h"
  37 #include "chardev/char-fe.h"
  38 #include "chardev/char-serial.h"
  39 #include "sysemu/sysemu.h"
  40 #include "hw/ssi/ssi.h"
  41 #include "qemu/cutils.h"
  42 #include "qemu/log.h"
  43
  44 //#define DEBUG
  45
  46 /*
  47  TODO
  48  - Implement cp15, c14 ?
  49  - Implement cp15, c15 !!! (idle used in L)
  50  - Implement idle mode handling/DIM
  51  - Implement sleep mode/Wake sources
  52  - Implement reset control
  53  - Implement memory control regs
  54  - PCMCIA handling
  55  - Maybe support MBGNT/MBREQ
  56  - DMA channels
  57  - GPCLK
  58  - IrDA
  59  - MCP
  60  - Enhance UART with modem signals
  61  */
  62
  63 #ifdef DEBUG
  64 # define DPRINTF(format, ...) printf(format , ## __VA_ARGS__)
  65 #else
  66 # define DPRINTF(format, ...) do { } while (0)
  67 #endif
  68
  69 static struct {
  70     hwaddr io_base;
  71     int irq;
  72 } sa_serial[] = {
  73     { 0x80010000, SA_PIC_UART1 },
  74     { 0x80030000, SA_PIC_UART2 },
  75     { 0x80050000, SA_PIC_UART3 },
  76     { 0, 0 }
  77 };
  78
  79 /* Interrupt Controller */
  80
  81 #define TYPE_STRONGARM_PIC "strongarm_pic"
  82 #define STRONGARM_PIC(obj) \
  83     OBJECT_CHECK(StrongARMPICState, (obj), TYPE_STRONGARM_PIC)
  84
  85 typedef struct StrongARMPICState {
  86     SysBusDevice parent_obj;
  87
  88     MemoryRegion iomem;
  89     qemu_irq    irq;
  90     qemu_irq    fiq;
  91
  92     uint32_t pending;
  93     uint32_t enabled;
  94     uint32_t is_fiq;
  95     uint32_t int_idle;
  96 } StrongARMPICState;
  97
  98 #define ICIP    0x00
  99 #define ICMR    0x04
 100 #define ICLR    0x08
 101 #define ICFP    0x10
 102 #define ICPR    0x20
 103 #define ICCR    0x0c
 104
 105 #define SA_PIC_SRCS     32
 106
 107
 108 static void strongarm_pic_update(void *opaque)
 109 {
 110     StrongARMPICState *s = opaque;
 111
 112     /* FIXME: reflect DIM */
 113     qemu_set_irq(s->fiq, s->pending & s->enabled &  s->is_fiq);
 114     qemu_set_irq(s->irq, s->pending & s->enabled & ~s->is_fiq);
 115 }
 116
 117 static void strongarm_pic_set_irq(void *opaque, int irq, int level)
 118 {
 119     StrongARMPICState *s = opaque;
 120
 121     if (level) {
 122         s->pending |= 1 << irq;
 123     } else {
 124         s->pending &= ~(1 << irq);
 125     }
 126
 127     strongarm_pic_update(s);
 128 }
 129
 130 static uint64_t strongarm_pic_mem_read(void *opaque, hwaddr offset,
 131                                        unsigned size)
 132 {
 133     StrongARMPICState *s = opaque;
 134
 135     switch (offset) {
 136     case ICIP:
 137         return s->pending & ~s->is_fiq & s->enabled;
 138     case ICMR:
 139         return s->enabled;
 140     case ICLR:
 141         return s->is_fiq;
 142     case ICCR:
 143         return s->int_idle == 0;
 144     case ICFP:
 145         return s->pending & s->is_fiq & s->enabled;
 146     case ICPR:
 147         return s->pending;
 148     default:
 149         printf("%s: Bad register offset 0x" TARGET_FMT_plx "\n",
 150                         __func__, offset);
 151         return 0;
 152     }
 153 }
 154
 155 static void strongarm_pic_mem_write(void *opaque, hwaddr offset,
 156                                     uint64_t value, unsigned size)
 157 {
 158     StrongARMPICState *s = opaque;
 159
 160     switch (offset) {
 161     case ICMR:
 162         s->enabled = value;
 163         break;
 164     case ICLR:
 165         s->is_fiq = value;
 166         break;
 167     case ICCR:
 168         s->int_idle = (value & 1) ? 0 : ~0;
 169         break;
 170     default:
 171         printf("%s: Bad register offset 0x" TARGET_FMT_plx "\n",
 172                         __func__, offset);
 173         break;
 174     }
 175     strongarm_pic_update(s);
 176 }
 177
 178 static const MemoryRegionOps strongarm_pic_ops = {
 179     .read = strongarm_pic_mem_read,
 180     .write = strongarm_pic_mem_write,
 181     .endianness = DEVICE_NATIVE_ENDIAN,
 182 };
 183
 184 static void strongarm_pic_initfn(Object *obj)
 185 {
 186     DeviceState *dev = DEVICE(obj);
 187     StrongARMPICState *s = STRONGARM_PIC(obj);
 188     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 189
 190     qdev_init_gpio_in(dev, strongarm_pic_set_irq, SA_PIC_SRCS);
 191     memory_region_init_io(&s->iomem, obj, &strongarm_pic_ops, s,
 192                           "pic", 0x1000);
 193     sysbus_init_mmio(sbd, &s->iomem);
 194     sysbus_init_irq(sbd, &s->irq);
 195     sysbus_init_irq(sbd, &s->fiq);
 196 }
 197
 198 static int strongarm_pic_post_load(void *opaque, int version_id)
 199 {
 200     strongarm_pic_update(opaque);
 201     return 0;
 202 }
 203
 204 static VMStateDescription vmstate_strongarm_pic_regs = {
 205     .name = "strongarm_pic",
 206     .version_id = 0,
 207     .minimum_version_id = 0,
 208     .post_load = strongarm_pic_post_load,
 209     .fields = (VMStateField[]) {
 210         VMSTATE_UINT32(pending, StrongARMPICState),
 211         VMSTATE_UINT32(enabled, StrongARMPICState),
 212         VMSTATE_UINT32(is_fiq, StrongARMPICState),
 213         VMSTATE_UINT32(int_idle, StrongARMPICState),
 214         VMSTATE_END_OF_LIST(),
 215     },
 216 };
 217
 218 static void strongarm_pic_class_init(ObjectClass *klass, void *data)
 219 {
 220     DeviceClass *dc = DEVICE_CLASS(klass);
 221
 222     dc->desc = "StrongARM PIC";
 223     dc->vmsd = &vmstate_strongarm_pic_regs;
 224 }
 225
 226 static const TypeInfo strongarm_pic_info = {
 227     .name          = TYPE_STRONGARM_PIC,
 228     .parent        = TYPE_SYS_BUS_DEVICE,
 229     .instance_size = sizeof(StrongARMPICState),
 230     .instance_init = strongarm_pic_initfn,
 231     .class_init    = strongarm_pic_class_init,
 232 };
 233
 234 /* Real-Time Clock */
 235 #define RTAR 0x00 /* RTC Alarm register */
 236 #define RCNR 0x04 /* RTC Counter register */
 237 #define RTTR 0x08 /* RTC Timer Trim register */
 238 #define RTSR 0x10 /* RTC Status register */
 239
 240 #define RTSR_AL (1 << 0) /* RTC Alarm detected */
 241 #define RTSR_HZ (1 << 1) /* RTC 1Hz detected */
 242 #define RTSR_ALE (1 << 2) /* RTC Alarm enable */
 243 #define RTSR_HZE (1 << 3) /* RTC 1Hz enable */
 244
 245 /* 16 LSB of RTTR are clockdiv for internal trim logic,
 246  * trim delete isn't emulated, so
 247  * f = 32 768 / (RTTR_trim + 1) */
 248
 249 #define TYPE_STRONGARM_RTC "strongarm-rtc"
 250 #define STRONGARM_RTC(obj) \
 251     OBJECT_CHECK(StrongARMRTCState, (obj), TYPE_STRONGARM_RTC)
 252
 253 typedef struct StrongARMRTCState {
 254     SysBusDevice parent_obj;
 255
 256     MemoryRegion iomem;
 257     uint32_t rttr;
 258     uint32_t rtsr;
 259     uint32_t rtar;
 260     uint32_t last_rcnr;
 261     int64_t last_hz;
 262     QEMUTimer *rtc_alarm;
 263     QEMUTimer *rtc_hz;
 264     qemu_irq rtc_irq;
 265     qemu_irq rtc_hz_irq;
 266 } StrongARMRTCState;
 267
 268 static inline void strongarm_rtc_int_update(StrongARMRTCState *s)
 269 {
 270     qemu_set_irq(s->rtc_irq, s->rtsr & RTSR_AL);
 271     qemu_set_irq(s->rtc_hz_irq, s->rtsr & RTSR_HZ);
 272 }
 273
 274 static void strongarm_rtc_hzupdate(StrongARMRTCState *s)
 275 {
 276     int64_t rt = qemu_clock_get_ms(rtc_clock);
 277     s->last_rcnr += ((rt - s->last_hz) << 15) /
 278             (1000 * ((s->rttr & 0xffff) + 1));
 279     s->last_hz = rt;
 280 }
 281
 282 static inline void strongarm_rtc_timer_update(StrongARMRTCState *s)
 283 {
 284     if ((s->rtsr & RTSR_HZE) && !(s->rtsr & RTSR_HZ)) {
 285         timer_mod(s->rtc_hz, s->last_hz + 1000);
 286     } else {
 287         timer_del(s->rtc_hz);
 288     }
 289
 290     if ((s->rtsr & RTSR_ALE) && !(s->rtsr & RTSR_AL)) {
 291         timer_mod(s->rtc_alarm, s->last_hz +
 292                 (((s->rtar - s->last_rcnr) * 1000 *
 293                   ((s->rttr & 0xffff) + 1)) >> 15));
 294     } else {
 295         timer_del(s->rtc_alarm);
 296     }
 297 }
 298
 299 static inline void strongarm_rtc_alarm_tick(void *opaque)
 300 {
 301     StrongARMRTCState *s = opaque;
 302     s->rtsr |= RTSR_AL;
 303     strongarm_rtc_timer_update(s);
 304     strongarm_rtc_int_update(s);
 305 }
 306
 307 static inline void strongarm_rtc_hz_tick(void *opaque)
 308 {
 309     StrongARMRTCState *s = opaque;
 310     s->rtsr |= RTSR_HZ;
 311     strongarm_rtc_timer_update(s);
 312     strongarm_rtc_int_update(s);
 313 }
 314
 315 static uint64_t strongarm_rtc_read(void *opaque, hwaddr addr,
 316                                    unsigned size)
 317 {
 318     StrongARMRTCState *s = opaque;
 319
 320     switch (addr) {
 321     case RTTR:
 322         return s->rttr;
 323     case RTSR:
 324         return s->rtsr;
 325     case RTAR:
 326         return s->rtar;
 327     case RCNR:
 328         return s->last_rcnr +
 329                 ((qemu_clock_get_ms(rtc_clock) - s->last_hz) << 15) /
 330                 (1000 * ((s->rttr & 0xffff) + 1));
 331     default:
 332         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
 333         return 0;
 334     }
 335 }
 336
 337 static void strongarm_rtc_write(void *opaque, hwaddr addr,
 338                                 uint64_t value, unsigned size)
 339 {
 340     StrongARMRTCState *s = opaque;
 341     uint32_t old_rtsr;
 342
 343     switch (addr) {
 344     case RTTR:
 345         strongarm_rtc_hzupdate(s);
 346         s->rttr = value;
 347         strongarm_rtc_timer_update(s);
 348         break;
 349
 350     case RTSR:
 351         old_rtsr = s->rtsr;
 352         s->rtsr = (value & (RTSR_ALE | RTSR_HZE)) |
 353                   (s->rtsr & ~(value & (RTSR_AL | RTSR_HZ)));
 354
 355         if (s->rtsr != old_rtsr) {
 356             strongarm_rtc_timer_update(s);
 357         }
 358
 359         strongarm_rtc_int_update(s);
 360         break;
 361
 362     case RTAR:
 363         s->rtar = value;
 364         strongarm_rtc_timer_update(s);
 365         break;
 366
 367     case RCNR:
 368         strongarm_rtc_hzupdate(s);
 369         s->last_rcnr = value;
 370         strongarm_rtc_timer_update(s);
 371         break;
 372
 373     default:
 374         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
 375     }
 376 }
 377
 378 static const MemoryRegionOps strongarm_rtc_ops = {
 379     .read = strongarm_rtc_read,
 380     .write = strongarm_rtc_write,
 381     .endianness = DEVICE_NATIVE_ENDIAN,
 382 };
 383
 384 static void strongarm_rtc_init(Object *obj)
 385 {
 386     StrongARMRTCState *s = STRONGARM_RTC(obj);
 387     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 388     struct tm tm;
 389
 390     s->rttr = 0x0;
 391     s->rtsr = 0;
 392
 393     qemu_get_timedate(&tm, 0);
 394
 395     s->last_rcnr = (uint32_t) mktimegm(&tm);
 396     s->last_hz = qemu_clock_get_ms(rtc_clock);
 397
 398     s->rtc_alarm = timer_new_ms(rtc_clock, strongarm_rtc_alarm_tick, s);
 399     s->rtc_hz = timer_new_ms(rtc_clock, strongarm_rtc_hz_tick, s);
 400
 401     sysbus_init_irq(dev, &s->rtc_irq);
 402     sysbus_init_irq(dev, &s->rtc_hz_irq);
 403
 404     memory_region_init_io(&s->iomem, obj, &strongarm_rtc_ops, s,
 405                           "rtc", 0x10000);
 406     sysbus_init_mmio(dev, &s->iomem);
 407 }
 408
 409 static int strongarm_rtc_pre_save(void *opaque)
 410 {
 411     StrongARMRTCState *s = opaque;
 412
 413     strongarm_rtc_hzupdate(s);
 414
 415     return 0;
 416 }
 417
 418 static int strongarm_rtc_post_load(void *opaque, int version_id)
 419 {
 420     StrongARMRTCState *s = opaque;
 421
 422     strongarm_rtc_timer_update(s);
 423     strongarm_rtc_int_update(s);
 424
 425     return 0;
 426 }
 427
 428 static const VMStateDescription vmstate_strongarm_rtc_regs = {
 429     .name = "strongarm-rtc",
 430     .version_id = 0,
 431     .minimum_version_id = 0,
 432     .pre_save = strongarm_rtc_pre_save,
 433     .post_load = strongarm_rtc_post_load,
 434     .fields = (VMStateField[]) {
 435         VMSTATE_UINT32(rttr, StrongARMRTCState),
 436         VMSTATE_UINT32(rtsr, StrongARMRTCState),
 437         VMSTATE_UINT32(rtar, StrongARMRTCState),
 438         VMSTATE_UINT32(last_rcnr, StrongARMRTCState),
 439         VMSTATE_INT64(last_hz, StrongARMRTCState),
 440         VMSTATE_END_OF_LIST(),
 441     },
 442 };
 443
 444 static void strongarm_rtc_sysbus_class_init(ObjectClass *klass, void *data)
 445 {
 446     DeviceClass *dc = DEVICE_CLASS(klass);
 447
 448     dc->desc = "StrongARM RTC Controller";
 449     dc->vmsd = &vmstate_strongarm_rtc_regs;
 450 }
 451
 452 static const TypeInfo strongarm_rtc_sysbus_info = {
 453     .name          = TYPE_STRONGARM_RTC,
 454     .parent        = TYPE_SYS_BUS_DEVICE,
 455     .instance_size = sizeof(StrongARMRTCState),
 456     .instance_init = strongarm_rtc_init,
 457     .class_init    = strongarm_rtc_sysbus_class_init,
 458 };
 459
 460 /* GPIO */
 461 #define GPLR 0x00
 462 #define GPDR 0x04
 463 #define GPSR 0x08
 464 #define GPCR 0x0c
 465 #define GRER 0x10
 466 #define GFER 0x14
 467 #define GEDR 0x18
 468 #define GAFR 0x1c
 469
 470 #define TYPE_STRONGARM_GPIO "strongarm-gpio"
 471 #define STRONGARM_GPIO(obj) \
 472     OBJECT_CHECK(StrongARMGPIOInfo, (obj), TYPE_STRONGARM_GPIO)
 473
 474 typedef struct StrongARMGPIOInfo StrongARMGPIOInfo;
 475 struct StrongARMGPIOInfo {
 476     SysBusDevice busdev;
 477     MemoryRegion iomem;
 478     qemu_irq handler[28];
 479     qemu_irq irqs[11];
 480     qemu_irq irqX;
 481
 482     uint32_t ilevel;
 483     uint32_t olevel;
 484     uint32_t dir;
 485     uint32_t rising;
 486     uint32_t falling;
 487     uint32_t status;
 488     uint32_t gafr;
 489
 490     uint32_t prev_level;
 491 };
 492
 493
 494 static void strongarm_gpio_irq_update(StrongARMGPIOInfo *s)
 495 {
 496     int i;
 497     for (i = 0; i < 11; i++) {
 498         qemu_set_irq(s->irqs[i], s->status & (1 << i));
 499     }
 500
 501     qemu_set_irq(s->irqX, (s->status & ~0x7ff));
 502 }
 503
 504 static void strongarm_gpio_set(void *opaque, int line, int level)
 505 {
 506     StrongARMGPIOInfo *s = opaque;
 507     uint32_t mask;
 508
 509     mask = 1 << line;
 510
 511     if (level) {
 512         s->status |= s->rising & mask &
 513                 ~s->ilevel & ~s->dir;
 514         s->ilevel |= mask;
 515     } else {
 516         s->status |= s->falling & mask &
 517                 s->ilevel & ~s->dir;
 518         s->ilevel &= ~mask;
 519     }
 520
 521     if (s->status & mask) {
 522         strongarm_gpio_irq_update(s);
 523     }
 524 }
 525
 526 static void strongarm_gpio_handler_update(StrongARMGPIOInfo *s)
 527 {
 528     uint32_t level, diff;
 529     int bit;
 530
 531     level = s->olevel & s->dir;
 532
 533     for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
 534         bit = ctz32(diff);
 535         qemu_set_irq(s->handler[bit], (level >> bit) & 1);
 536     }
 537
 538     s->prev_level = level;
 539 }
 540
 541 static uint64_t strongarm_gpio_read(void *opaque, hwaddr offset,
 542                                     unsigned size)
 543 {
 544     StrongARMGPIOInfo *s = opaque;
 545
 546     switch (offset) {
 547     case GPDR:        /* GPIO Pin-Direction registers */
 548         return s->dir;
 549
 550     case GPSR:        /* GPIO Pin-Output Set registers */
 551         qemu_log_mask(LOG_GUEST_ERROR,
 552                       "strongarm GPIO: read from write only register GPSR\n");
 553         return 0;
 554
 555     case GPCR:        /* GPIO Pin-Output Clear registers */
 556         qemu_log_mask(LOG_GUEST_ERROR,
 557                       "strongarm GPIO: read from write only register GPCR\n");
 558         return 0;
 559
 560     case GRER:        /* GPIO Rising-Edge Detect Enable registers */
 561         return s->rising;
 562
 563     case GFER:        /* GPIO Falling-Edge Detect Enable registers */
 564         return s->falling;
 565
 566     case GAFR:        /* GPIO Alternate Function registers */
 567         return s->gafr;
 568
 569     case GPLR:        /* GPIO Pin-Level registers */
 570         return (s->olevel & s->dir) |
 571                (s->ilevel & ~s->dir);
 572
 573     case GEDR:        /* GPIO Edge Detect Status registers */
 574         return s->status;
 575
 576     default:
 577         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 578     }
 579
 580     return 0;
 581 }
 582
 583 static void strongarm_gpio_write(void *opaque, hwaddr offset,
 584                                  uint64_t value, unsigned size)
 585 {
 586     StrongARMGPIOInfo *s = opaque;
 587
 588     switch (offset) {
 589     case GPDR:        /* GPIO Pin-Direction registers */
 590         s->dir = value;
 591         strongarm_gpio_handler_update(s);
 592         break;
 593
 594     case GPSR:        /* GPIO Pin-Output Set registers */
 595         s->olevel |= value;
 596         strongarm_gpio_handler_update(s);
 597         break;
 598
 599     case GPCR:        /* GPIO Pin-Output Clear registers */
 600         s->olevel &= ~value;
 601         strongarm_gpio_handler_update(s);
 602         break;
 603
 604     case GRER:        /* GPIO Rising-Edge Detect Enable registers */
 605         s->rising = value;
 606         break;
 607
 608     case GFER:        /* GPIO Falling-Edge Detect Enable registers */
 609         s->falling = value;
 610         break;
 611
 612     case GAFR:        /* GPIO Alternate Function registers */
 613         s->gafr = value;
 614         break;
 615
 616     case GEDR:        /* GPIO Edge Detect Status registers */
 617         s->status &= ~value;
 618         strongarm_gpio_irq_update(s);
 619         break;
 620
 621     default:
 622         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 623     }
 624 }
 625
 626 static const MemoryRegionOps strongarm_gpio_ops = {
 627     .read = strongarm_gpio_read,
 628     .write = strongarm_gpio_write,
 629     .endianness = DEVICE_NATIVE_ENDIAN,
 630 };
 631
 632 static DeviceState *strongarm_gpio_init(hwaddr base,
 633                 DeviceState *pic)
 634 {
 635     DeviceState *dev;
 636     int i;
 637
 638     dev = qdev_create(NULL, TYPE_STRONGARM_GPIO);
 639     qdev_init_nofail(dev);
 640
 641     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
 642     for (i = 0; i < 12; i++)
 643         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
 644                     qdev_get_gpio_in(pic, SA_PIC_GPIO0_EDGE + i));
 645
 646     return dev;
 647 }
 648
 649 static void strongarm_gpio_initfn(Object *obj)
 650 {
 651     DeviceState *dev = DEVICE(obj);
 652     StrongARMGPIOInfo *s = STRONGARM_GPIO(obj);
 653     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 654     int i;
 655
 656     qdev_init_gpio_in(dev, strongarm_gpio_set, 28);
 657     qdev_init_gpio_out(dev, s->handler, 28);
 658
 659     memory_region_init_io(&s->iomem, obj, &strongarm_gpio_ops, s,
 660                           "gpio", 0x1000);
 661
 662     sysbus_init_mmio(sbd, &s->iomem);
 663     for (i = 0; i < 11; i++) {
 664         sysbus_init_irq(sbd, &s->irqs[i]);
 665     }
 666     sysbus_init_irq(sbd, &s->irqX);
 667 }
 668
 669 static const VMStateDescription vmstate_strongarm_gpio_regs = {
 670     .name = "strongarm-gpio",
 671     .version_id = 0,
 672     .minimum_version_id = 0,
 673     .fields = (VMStateField[]) {
 674         VMSTATE_UINT32(ilevel, StrongARMGPIOInfo),
 675         VMSTATE_UINT32(olevel, StrongARMGPIOInfo),
 676         VMSTATE_UINT32(dir, StrongARMGPIOInfo),
 677         VMSTATE_UINT32(rising, StrongARMGPIOInfo),
 678         VMSTATE_UINT32(falling, StrongARMGPIOInfo),
 679         VMSTATE_UINT32(status, StrongARMGPIOInfo),
 680         VMSTATE_UINT32(gafr, StrongARMGPIOInfo),
 681         VMSTATE_UINT32(prev_level, StrongARMGPIOInfo),
 682         VMSTATE_END_OF_LIST(),
 683     },
 684 };
 685
 686 static void strongarm_gpio_class_init(ObjectClass *klass, void *data)
 687 {
 688     DeviceClass *dc = DEVICE_CLASS(klass);
 689
 690     dc->desc = "StrongARM GPIO controller";
 691     dc->vmsd = &vmstate_strongarm_gpio_regs;
 692 }
 693
 694 static const TypeInfo strongarm_gpio_info = {
 695     .name          = TYPE_STRONGARM_GPIO,
 696     .parent        = TYPE_SYS_BUS_DEVICE,
 697     .instance_size = sizeof(StrongARMGPIOInfo),
 698     .instance_init = strongarm_gpio_initfn,
 699     .class_init    = strongarm_gpio_class_init,
 700 };
 701
 702 /* Peripheral Pin Controller */
 703 #define PPDR 0x00
 704 #define PPSR 0x04
 705 #define PPAR 0x08
 706 #define PSDR 0x0c
 707 #define PPFR 0x10
 708
 709 #define TYPE_STRONGARM_PPC "strongarm-ppc"
 710 #define STRONGARM_PPC(obj) \
 711     OBJECT_CHECK(StrongARMPPCInfo, (obj), TYPE_STRONGARM_PPC)
 712
 713 typedef struct StrongARMPPCInfo StrongARMPPCInfo;
 714 struct StrongARMPPCInfo {
 715     SysBusDevice parent_obj;
 716
 717     MemoryRegion iomem;
 718     qemu_irq handler[28];
 719
 720     uint32_t ilevel;
 721     uint32_t olevel;
 722     uint32_t dir;
 723     uint32_t ppar;
 724     uint32_t psdr;
 725     uint32_t ppfr;
 726
 727     uint32_t prev_level;
 728 };
 729
 730 static void strongarm_ppc_set(void *opaque, int line, int level)
 731 {
 732     StrongARMPPCInfo *s = opaque;
 733
 734     if (level) {
 735         s->ilevel |= 1 << line;
 736     } else {
 737         s->ilevel &= ~(1 << line);
 738     }
 739 }
 740
 741 static void strongarm_ppc_handler_update(StrongARMPPCInfo *s)
 742 {
 743     uint32_t level, diff;
 744     int bit;
 745
 746     level = s->olevel & s->dir;
 747
 748     for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
 749         bit = ctz32(diff);
 750         qemu_set_irq(s->handler[bit], (level >> bit) & 1);
 751     }
 752
 753     s->prev_level = level;
 754 }
 755
 756 static uint64_t strongarm_ppc_read(void *opaque, hwaddr offset,
 757                                    unsigned size)
 758 {
 759     StrongARMPPCInfo *s = opaque;
 760
 761     switch (offset) {
 762     case PPDR:        /* PPC Pin Direction registers */
 763         return s->dir | ~0x3fffff;
 764
 765     case PPSR:        /* PPC Pin State registers */
 766         return (s->olevel & s->dir) |
 767                (s->ilevel & ~s->dir) |
 768                ~0x3fffff;
 769
 770     case PPAR:
 771         return s->ppar | ~0x41000;
 772
 773     case PSDR:
 774         return s->psdr;
 775
 776     case PPFR:
 777         return s->ppfr | ~0x7f001;
 778
 779     default:
 780         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 781     }
 782
 783     return 0;
 784 }
 785
 786 static void strongarm_ppc_write(void *opaque, hwaddr offset,
 787                                 uint64_t value, unsigned size)
 788 {
 789     StrongARMPPCInfo *s = opaque;
 790
 791     switch (offset) {
 792     case PPDR:        /* PPC Pin Direction registers */
 793         s->dir = value & 0x3fffff;
 794         strongarm_ppc_handler_update(s);
 795         break;
 796
 797     case PPSR:        /* PPC Pin State registers */
 798         s->olevel = value & s->dir & 0x3fffff;
 799         strongarm_ppc_handler_update(s);
 800         break;
 801
 802     case PPAR:
 803         s->ppar = value & 0x41000;
 804         break;
 805
 806     case PSDR:
 807         s->psdr = value & 0x3fffff;
 808         break;
 809
 810     case PPFR:
 811         s->ppfr = value & 0x7f001;
 812         break;
 813
 814     default:
 815         printf("%s: Bad offset 0x" TARGET_FMT_plx "\n", __func__, offset);
 816     }
 817 }
 818
 819 static const MemoryRegionOps strongarm_ppc_ops = {
 820     .read = strongarm_ppc_read,
 821     .write = strongarm_ppc_write,
 822     .endianness = DEVICE_NATIVE_ENDIAN,
 823 };
 824
 825 static void strongarm_ppc_init(Object *obj)
 826 {
 827     DeviceState *dev = DEVICE(obj);
 828     StrongARMPPCInfo *s = STRONGARM_PPC(obj);
 829     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 830
 831     qdev_init_gpio_in(dev, strongarm_ppc_set, 22);
 832     qdev_init_gpio_out(dev, s->handler, 22);
 833
 834     memory_region_init_io(&s->iomem, obj, &strongarm_ppc_ops, s,
 835                           "ppc", 0x1000);
 836
 837     sysbus_init_mmio(sbd, &s->iomem);
 838 }
 839
 840 static const VMStateDescription vmstate_strongarm_ppc_regs = {
 841     .name = "strongarm-ppc",
 842     .version_id = 0,
 843     .minimum_version_id = 0,
 844     .fields = (VMStateField[]) {
 845         VMSTATE_UINT32(ilevel, StrongARMPPCInfo),
 846         VMSTATE_UINT32(olevel, StrongARMPPCInfo),
 847         VMSTATE_UINT32(dir, StrongARMPPCInfo),
 848         VMSTATE_UINT32(ppar, StrongARMPPCInfo),
 849         VMSTATE_UINT32(psdr, StrongARMPPCInfo),
 850         VMSTATE_UINT32(ppfr, StrongARMPPCInfo),
 851         VMSTATE_UINT32(prev_level, StrongARMPPCInfo),
 852         VMSTATE_END_OF_LIST(),
 853     },
 854 };
 855
 856 static void strongarm_ppc_class_init(ObjectClass *klass, void *data)
 857 {
 858     DeviceClass *dc = DEVICE_CLASS(klass);
 859
 860     dc->desc = "StrongARM PPC controller";
 861     dc->vmsd = &vmstate_strongarm_ppc_regs;
 862 }
 863
 864 static const TypeInfo strongarm_ppc_info = {
 865     .name          = TYPE_STRONGARM_PPC,
 866     .parent        = TYPE_SYS_BUS_DEVICE,
 867     .instance_size = sizeof(StrongARMPPCInfo),
 868     .instance_init = strongarm_ppc_init,
 869     .class_init    = strongarm_ppc_class_init,
 870 };
 871
 872 /* UART Ports */
 873 #define UTCR0 0x00
 874 #define UTCR1 0x04
 875 #define UTCR2 0x08
 876 #define UTCR3 0x0c
 877 #define UTDR  0x14
 878 #define UTSR0 0x1c
 879 #define UTSR1 0x20
 880
 881 #define UTCR0_PE  (1 << 0) /* Parity enable */
 882 #define UTCR0_OES (1 << 1) /* Even parity */
 883 #define UTCR0_SBS (1 << 2) /* 2 stop bits */
 884 #define UTCR0_DSS (1 << 3) /* 8-bit data */
 885
 886 #define UTCR3_RXE (1 << 0) /* Rx enable */
 887 #define UTCR3_TXE (1 << 1) /* Tx enable */
 888 #define UTCR3_BRK (1 << 2) /* Force Break */
 889 #define UTCR3_RIE (1 << 3) /* Rx int enable */
 890 #define UTCR3_TIE (1 << 4) /* Tx int enable */
 891 #define UTCR3_LBM (1 << 5) /* Loopback */
 892
 893 #define UTSR0_TFS (1 << 0) /* Tx FIFO nearly empty */
 894 #define UTSR0_RFS (1 << 1) /* Rx FIFO nearly full */
 895 #define UTSR0_RID (1 << 2) /* Receiver Idle */
 896 #define UTSR0_RBB (1 << 3) /* Receiver begin break */
 897 #define UTSR0_REB (1 << 4) /* Receiver end break */
 898 #define UTSR0_EIF (1 << 5) /* Error in FIFO */
 899
 900 #define UTSR1_RNE (1 << 1) /* Receive FIFO not empty */
 901 #define UTSR1_TNF (1 << 2) /* Transmit FIFO not full */
 902 #define UTSR1_PRE (1 << 3) /* Parity error */
 903 #define UTSR1_FRE (1 << 4) /* Frame error */
 904 #define UTSR1_ROR (1 << 5) /* Receive Over Run */
 905
 906 #define RX_FIFO_PRE (1 << 8)
 907 #define RX_FIFO_FRE (1 << 9)
 908 #define RX_FIFO_ROR (1 << 10)
 909
 910 #define TYPE_STRONGARM_UART "strongarm-uart"
 911 #define STRONGARM_UART(obj) \
 912     OBJECT_CHECK(StrongARMUARTState, (obj), TYPE_STRONGARM_UART)
 913
 914 typedef struct StrongARMUARTState {
 915     SysBusDevice parent_obj;
 916
 917     MemoryRegion iomem;
 918     CharBackend chr;
 919     qemu_irq irq;
 920
 921     uint8_t utcr0;
 922     uint16_t brd;
 923     uint8_t utcr3;
 924     uint8_t utsr0;
 925     uint8_t utsr1;
 926
 927     uint8_t tx_fifo[8];
 928     uint8_t tx_start;
 929     uint8_t tx_len;
 930     uint16_t rx_fifo[12]; /* value + error flags in high bits */
 931     uint8_t rx_start;
 932     uint8_t rx_len;
 933
 934     uint64_t char_transmit_time; /* time to transmit a char in ticks*/
 935     bool wait_break_end;
 936     QEMUTimer *rx_timeout_timer;
 937     QEMUTimer *tx_timer;
 938 } StrongARMUARTState;
 939
 940 static void strongarm_uart_update_status(StrongARMUARTState *s)
 941 {
 942     uint16_t utsr1 = 0;
 943
 944     if (s->tx_len != 8) {
 945         utsr1 |= UTSR1_TNF;
 946     }
 947
 948     if (s->rx_len != 0) {
 949         uint16_t ent = s->rx_fifo[s->rx_start];
 950
 951         utsr1 |= UTSR1_RNE;
 952         if (ent & RX_FIFO_PRE) {
 953             s->utsr1 |= UTSR1_PRE;
 954         }
 955         if (ent & RX_FIFO_FRE) {
 956             s->utsr1 |= UTSR1_FRE;
 957         }
 958         if (ent & RX_FIFO_ROR) {
 959             s->utsr1 |= UTSR1_ROR;
 960         }
 961     }
 962
 963     s->utsr1 = utsr1;
 964 }
 965
 966 static void strongarm_uart_update_int_status(StrongARMUARTState *s)
 967 {
 968     uint16_t utsr0 = s->utsr0 &
 969             (UTSR0_REB | UTSR0_RBB | UTSR0_RID);
 970     int i;
 971
 972     if ((s->utcr3 & UTCR3_TXE) &&
 973                 (s->utcr3 & UTCR3_TIE) &&
 974                 s->tx_len <= 4) {
 975         utsr0 |= UTSR0_TFS;
 976     }
 977
 978     if ((s->utcr3 & UTCR3_RXE) &&
 979                 (s->utcr3 & UTCR3_RIE) &&
 980                 s->rx_len > 4) {
 981         utsr0 |= UTSR0_RFS;
 982     }
 983
 984     for (i = 0; i < s->rx_len && i < 4; i++)
 985         if (s->rx_fifo[(s->rx_start + i) % 12] & ~0xff) {
 986             utsr0 |= UTSR0_EIF;
 987             break;
 988         }
 989
 990     s->utsr0 = utsr0;
 991     qemu_set_irq(s->irq, utsr0);
 992 }
 993
 994 static void strongarm_uart_update_parameters(StrongARMUARTState *s)
 995 {
 996     int speed, parity, data_bits, stop_bits, frame_size;
 997     QEMUSerialSetParams ssp;
 998
 999     /* Start bit. */
1000     frame_size = 1;
1001     if (s->utcr0 & UTCR0_PE) {
1002         /* Parity bit. */
1003         frame_size++;
1004         if (s->utcr0 & UTCR0_OES) {
1005             parity = 'E';
1006         } else {
1007             parity = 'O';
1008         }
1009     } else {
1010             parity = 'N';
1011     }
1012     if (s->utcr0 & UTCR0_SBS) {
1013         stop_bits = 2;
1014     } else {
1015         stop_bits = 1;
1016     }
1017
1018     data_bits = (s->utcr0 & UTCR0_DSS) ? 8 : 7;
1019     frame_size += data_bits + stop_bits;
1020     speed = 3686400 / 16 / (s->brd + 1);
1021     ssp.speed = speed;
1022     ssp.parity = parity;
1023     ssp.data_bits = data_bits;
1024     ssp.stop_bits = stop_bits;
1025     s->char_transmit_time =  (NANOSECONDS_PER_SECOND / speed) * frame_size;
1026     qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
1027
1028     DPRINTF(stderr, "%s speed=%d parity=%c data=%d stop=%d\n", s->chr->label,
1029             speed, parity, data_bits, stop_bits);
1030 }
1031
1032 static void strongarm_uart_rx_to(void *opaque)
1033 {
1034     StrongARMUARTState *s = opaque;
1035
1036     if (s->rx_len) {
1037         s->utsr0 |= UTSR0_RID;
1038         strongarm_uart_update_int_status(s);
1039     }
1040 }
1041
1042 static void strongarm_uart_rx_push(StrongARMUARTState *s, uint16_t c)
1043 {
1044     if ((s->utcr3 & UTCR3_RXE) == 0) {
1045         /* rx disabled */
1046         return;
1047     }
1048
1049     if (s->wait_break_end) {
1050         s->utsr0 |= UTSR0_REB;
1051         s->wait_break_end = false;
1052     }
1053
1054     if (s->rx_len < 12) {
1055         s->rx_fifo[(s->rx_start + s->rx_len) % 12] = c;
1056         s->rx_len++;
1057     } else
1058         s->rx_fifo[(s->rx_start + 11) % 12] |= RX_FIFO_ROR;
1059 }
1060
1061 static int strongarm_uart_can_receive(void *opaque)
1062 {
1063     StrongARMUARTState *s = opaque;
1064
1065     if (s->rx_len == 12) {
1066         return 0;
1067     }
1068     /* It's best not to get more than 2/3 of RX FIFO, so advertise that much */
1069     if (s->rx_len < 8) {
1070         return 8 - s->rx_len;
1071     }
1072     return 1;
1073 }
1074
1075 static void strongarm_uart_receive(void *opaque, const uint8_t *buf, int size)
1076 {
1077     StrongARMUARTState *s = opaque;
1078     int i;
1079
1080     for (i = 0; i < size; i++) {
1081         strongarm_uart_rx_push(s, buf[i]);
1082     }
1083
1084     /* call the timeout receive callback in 3 char transmit time */
1085     timer_mod(s->rx_timeout_timer,
1086                     qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time * 3);
1087
1088     strongarm_uart_update_status(s);
1089     strongarm_uart_update_int_status(s);
1090 }
1091
1092 static void strongarm_uart_event(void *opaque, int event)
1093 {
1094     StrongARMUARTState *s = opaque;
1095     if (event == CHR_EVENT_BREAK) {
1096         s->utsr0 |= UTSR0_RBB;
1097         strongarm_uart_rx_push(s, RX_FIFO_FRE);
1098         s->wait_break_end = true;
1099         strongarm_uart_update_status(s);
1100         strongarm_uart_update_int_status(s);
1101     }
1102 }
1103
1104 static void strongarm_uart_tx(void *opaque)
1105 {
1106     StrongARMUARTState *s = opaque;
1107     uint64_t new_xmit_ts = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1108
1109     if (s->utcr3 & UTCR3_LBM) /* loopback */ {
1110         strongarm_uart_receive(s, &s->tx_fifo[s->tx_start], 1);
1111     } else if (qemu_chr_fe_backend_connected(&s->chr)) {
1112         /* XXX this blocks entire thread. Rewrite to use
1113          * qemu_chr_fe_write and background I/O callbacks */
1114         qemu_chr_fe_write_all(&s->chr, &s->tx_fifo[s->tx_start], 1);
1115     }
1116
1117     s->tx_start = (s->tx_start + 1) % 8;
1118     s->tx_len--;
1119     if (s->tx_len) {
1120         timer_mod(s->tx_timer, new_xmit_ts + s->char_transmit_time);
1121     }
1122     strongarm_uart_update_status(s);
1123     strongarm_uart_update_int_status(s);
1124 }
1125
1126 static uint64_t strongarm_uart_read(void *opaque, hwaddr addr,
1127                                     unsigned size)
1128 {
1129     StrongARMUARTState *s = opaque;
1130     uint16_t ret;
1131
1132     switch (addr) {
1133     case UTCR0:
1134         return s->utcr0;
1135
1136     case UTCR1:
1137         return s->brd >> 8;
1138
1139     case UTCR2:
1140         return s->brd & 0xff;
1141
1142     case UTCR3:
1143         return s->utcr3;
1144
1145     case UTDR:
1146         if (s->rx_len != 0) {
1147             ret = s->rx_fifo[s->rx_start];
1148             s->rx_start = (s->rx_start + 1) % 12;
1149             s->rx_len--;
1150             strongarm_uart_update_status(s);
1151             strongarm_uart_update_int_status(s);
1152             return ret;
1153         }
1154         return 0;
1155
1156     case UTSR0:
1157         return s->utsr0;
1158
1159     case UTSR1:
1160         return s->utsr1;
1161
1162     default:
1163         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1164         return 0;
1165     }
1166 }
1167
1168 static void strongarm_uart_write(void *opaque, hwaddr addr,
1169                                  uint64_t value, unsigned size)
1170 {
1171     StrongARMUARTState *s = opaque;
1172
1173     switch (addr) {
1174     case UTCR0:
1175         s->utcr0 = value & 0x7f;
1176         strongarm_uart_update_parameters(s);
1177         break;
1178
1179     case UTCR1:
1180         s->brd = (s->brd & 0xff) | ((value & 0xf) << 8);
1181         strongarm_uart_update_parameters(s);
1182         break;
1183
1184     case UTCR2:
1185         s->brd = (s->brd & 0xf00) | (value & 0xff);
1186         strongarm_uart_update_parameters(s);
1187         break;
1188
1189     case UTCR3:
1190         s->utcr3 = value & 0x3f;
1191         if ((s->utcr3 & UTCR3_RXE) == 0) {
1192             s->rx_len = 0;
1193         }
1194         if ((s->utcr3 & UTCR3_TXE) == 0) {
1195             s->tx_len = 0;
1196         }
1197         strongarm_uart_update_status(s);
1198         strongarm_uart_update_int_status(s);
1199         break;
1200
1201     case UTDR:
1202         if ((s->utcr3 & UTCR3_TXE) && s->tx_len != 8) {
1203             s->tx_fifo[(s->tx_start + s->tx_len) % 8] = value;
1204             s->tx_len++;
1205             strongarm_uart_update_status(s);
1206             strongarm_uart_update_int_status(s);
1207             if (s->tx_len == 1) {
1208                 strongarm_uart_tx(s);
1209             }
1210         }
1211         break;
1212
1213     case UTSR0:
1214         s->utsr0 = s->utsr0 & ~(value &
1215                 (UTSR0_REB | UTSR0_RBB | UTSR0_RID));
1216         strongarm_uart_update_int_status(s);
1217         break;
1218
1219     default:
1220         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1221     }
1222 }
1223
1224 static const MemoryRegionOps strongarm_uart_ops = {
1225     .read = strongarm_uart_read,
1226     .write = strongarm_uart_write,
1227     .endianness = DEVICE_NATIVE_ENDIAN,
1228 };
1229
1230 static void strongarm_uart_init(Object *obj)
1231 {
1232     StrongARMUARTState *s = STRONGARM_UART(obj);
1233     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
1234
1235     memory_region_init_io(&s->iomem, obj, &strongarm_uart_ops, s,
1236                           "uart", 0x10000);
1237     sysbus_init_mmio(dev, &s->iomem);
1238     sysbus_init_irq(dev, &s->irq);
1239
1240     s->rx_timeout_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, strongarm_uart_rx_to, s);
1241     s->tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, strongarm_uart_tx, s);
1242 }
1243
1244 static void strongarm_uart_realize(DeviceState *dev, Error **errp)
1245 {
1246     StrongARMUARTState *s = STRONGARM_UART(dev);
1247
1248     qemu_chr_fe_set_handlers(&s->chr,
1249                              strongarm_uart_can_receive,
1250                              strongarm_uart_receive,
1251                              strongarm_uart_event,
1252                              NULL, s, NULL, true);
1253 }
1254
1255 static void strongarm_uart_reset(DeviceState *dev)
1256 {
1257     StrongARMUARTState *s = STRONGARM_UART(dev);
1258
1259     s->utcr0 = UTCR0_DSS; /* 8 data, no parity */
1260     s->brd = 23;    /* 9600 */
1261     /* enable send & recv - this actually violates spec */
1262     s->utcr3 = UTCR3_TXE | UTCR3_RXE;
1263
1264     s->rx_len = s->tx_len = 0;
1265
1266     strongarm_uart_update_parameters(s);
1267     strongarm_uart_update_status(s);
1268     strongarm_uart_update_int_status(s);
1269 }
1270
1271 static int strongarm_uart_post_load(void *opaque, int version_id)
1272 {
1273     StrongARMUARTState *s = opaque;
1274
1275     strongarm_uart_update_parameters(s);
1276     strongarm_uart_update_status(s);
1277     strongarm_uart_update_int_status(s);
1278
1279     /* tx and restart timer */
1280     if (s->tx_len) {
1281         strongarm_uart_tx(s);
1282     }
1283
1284     /* restart rx timeout timer */
1285     if (s->rx_len) {
1286         timer_mod(s->rx_timeout_timer,
1287                 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time * 3);
1288     }
1289
1290     return 0;
1291 }
1292
1293 static const VMStateDescription vmstate_strongarm_uart_regs = {
1294     .name = "strongarm-uart",
1295     .version_id = 0,
1296     .minimum_version_id = 0,
1297     .post_load = strongarm_uart_post_load,
1298     .fields = (VMStateField[]) {
1299         VMSTATE_UINT8(utcr0, StrongARMUARTState),
1300         VMSTATE_UINT16(brd, StrongARMUARTState),
1301         VMSTATE_UINT8(utcr3, StrongARMUARTState),
1302         VMSTATE_UINT8(utsr0, StrongARMUARTState),
1303         VMSTATE_UINT8_ARRAY(tx_fifo, StrongARMUARTState, 8),
1304         VMSTATE_UINT8(tx_start, StrongARMUARTState),
1305         VMSTATE_UINT8(tx_len, StrongARMUARTState),
1306         VMSTATE_UINT16_ARRAY(rx_fifo, StrongARMUARTState, 12),
1307         VMSTATE_UINT8(rx_start, StrongARMUARTState),
1308         VMSTATE_UINT8(rx_len, StrongARMUARTState),
1309         VMSTATE_BOOL(wait_break_end, StrongARMUARTState),
1310         VMSTATE_END_OF_LIST(),
1311     },
1312 };
1313
1314 static Property strongarm_uart_properties[] = {
1315     DEFINE_PROP_CHR("chardev", StrongARMUARTState, chr),
1316     DEFINE_PROP_END_OF_LIST(),
1317 };
1318
1319 static void strongarm_uart_class_init(ObjectClass *klass, void *data)
1320 {
1321     DeviceClass *dc = DEVICE_CLASS(klass);
1322
1323     dc->desc = "StrongARM UART controller";
1324     dc->reset = strongarm_uart_reset;
1325     dc->vmsd = &vmstate_strongarm_uart_regs;
1326     dc->props = strongarm_uart_properties;
1327     dc->realize = strongarm_uart_realize;
1328 }
1329
1330 static const TypeInfo strongarm_uart_info = {
1331     .name          = TYPE_STRONGARM_UART,
1332     .parent        = TYPE_SYS_BUS_DEVICE,
1333     .instance_size = sizeof(StrongARMUARTState),
1334     .instance_init = strongarm_uart_init,
1335     .class_init    = strongarm_uart_class_init,
1336 };
1337
1338 /* Synchronous Serial Ports */
1339
1340 #define TYPE_STRONGARM_SSP "strongarm-ssp"
1341 #define STRONGARM_SSP(obj) \
1342     OBJECT_CHECK(StrongARMSSPState, (obj), TYPE_STRONGARM_SSP)
1343
1344 typedef struct StrongARMSSPState {
1345     SysBusDevice parent_obj;
1346
1347     MemoryRegion iomem;
1348     qemu_irq irq;
1349     SSIBus *bus;
1350
1351     uint16_t sscr[2];
1352     uint16_t sssr;
1353
1354     uint16_t rx_fifo[8];
1355     uint8_t rx_level;
1356     uint8_t rx_start;
1357 } StrongARMSSPState;
1358
1359 #define SSCR0 0x60 /* SSP Control register 0 */
1360 #define SSCR1 0x64 /* SSP Control register 1 */
1361 #define SSDR  0x6c /* SSP Data register */
1362 #define SSSR  0x74 /* SSP Status register */
1363
1364 /* Bitfields for above registers */
1365 #define SSCR0_SPI(x)    (((x) & 0x30) == 0x00)
1366 #define SSCR0_SSP(x)    (((x) & 0x30) == 0x10)
1367 #define SSCR0_UWIRE(x)  (((x) & 0x30) == 0x20)
1368 #define SSCR0_PSP(x)    (((x) & 0x30) == 0x30)
1369 #define SSCR0_SSE       (1 << 7)
1370 #define SSCR0_DSS(x)    (((x) & 0xf) + 1)
1371 #define SSCR1_RIE       (1 << 0)
1372 #define SSCR1_TIE       (1 << 1)
1373 #define SSCR1_LBM       (1 << 2)
1374 #define SSSR_TNF        (1 << 2)
1375 #define SSSR_RNE        (1 << 3)
1376 #define SSSR_TFS        (1 << 5)
1377 #define SSSR_RFS        (1 << 6)
1378 #define SSSR_ROR        (1 << 7)
1379 #define SSSR_RW         0x0080
1380
1381 static void strongarm_ssp_int_update(StrongARMSSPState *s)
1382 {
1383     int level = 0;
1384
1385     level |= (s->sssr & SSSR_ROR);
1386     level |= (s->sssr & SSSR_RFS)  &&  (s->sscr[1] & SSCR1_RIE);
1387     level |= (s->sssr & SSSR_TFS)  &&  (s->sscr[1] & SSCR1_TIE);
1388     qemu_set_irq(s->irq, level);
1389 }
1390
1391 static void strongarm_ssp_fifo_update(StrongARMSSPState *s)
1392 {
1393     s->sssr &= ~SSSR_TFS;
1394     s->sssr &= ~SSSR_TNF;
1395     if (s->sscr[0] & SSCR0_SSE) {
1396         if (s->rx_level >= 4) {
1397             s->sssr |= SSSR_RFS;
1398         } else {
1399             s->sssr &= ~SSSR_RFS;
1400         }
1401         if (s->rx_level) {
1402             s->sssr |= SSSR_RNE;
1403         } else {
1404             s->sssr &= ~SSSR_RNE;
1405         }
1406         /* TX FIFO is never filled, so it is always in underrun
1407            condition if SSP is enabled */
1408         s->sssr |= SSSR_TFS;
1409         s->sssr |= SSSR_TNF;
1410     }
1411
1412     strongarm_ssp_int_update(s);
1413 }
1414
1415 static uint64_t strongarm_ssp_read(void *opaque, hwaddr addr,
1416                                    unsigned size)
1417 {
1418     StrongARMSSPState *s = opaque;
1419     uint32_t retval;
1420
1421     switch (addr) {
1422     case SSCR0:
1423         return s->sscr[0];
1424     case SSCR1:
1425         return s->sscr[1];
1426     case SSSR:
1427         return s->sssr;
1428     case SSDR:
1429         if (~s->sscr[0] & SSCR0_SSE) {
1430             return 0xffffffff;
1431         }
1432         if (s->rx_level < 1) {
1433             printf("%s: SSP Rx Underrun\n", __func__);
1434             return 0xffffffff;
1435         }
1436         s->rx_level--;
1437         retval = s->rx_fifo[s->rx_start++];
1438         s->rx_start &= 0x7;
1439         strongarm_ssp_fifo_update(s);
1440         return retval;
1441     default:
1442         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1443         break;
1444     }
1445     return 0;
1446 }
1447
1448 static void strongarm_ssp_write(void *opaque, hwaddr addr,
1449                                 uint64_t value, unsigned size)
1450 {
1451     StrongARMSSPState *s = opaque;
1452
1453     switch (addr) {
1454     case SSCR0:
1455         s->sscr[0] = value & 0xffbf;
1456         if ((s->sscr[0] & SSCR0_SSE) && SSCR0_DSS(value) < 4) {
1457             printf("%s: Wrong data size: %i bits\n", __func__,
1458                    (int)SSCR0_DSS(value));
1459         }
1460         if (!(value & SSCR0_SSE)) {
1461             s->sssr = 0;
1462             s->rx_level = 0;
1463         }
1464         strongarm_ssp_fifo_update(s);
1465         break;
1466
1467     case SSCR1:
1468         s->sscr[1] = value & 0x2f;
1469         if (value & SSCR1_LBM) {
1470             printf("%s: Attempt to use SSP LBM mode\n", __func__);
1471         }
1472         strongarm_ssp_fifo_update(s);
1473         break;
1474
1475     case SSSR:
1476         s->sssr &= ~(value & SSSR_RW);
1477         strongarm_ssp_int_update(s);
1478         break;
1479
1480     case SSDR:
1481         if (SSCR0_UWIRE(s->sscr[0])) {
1482             value &= 0xff;
1483         } else
1484             /* Note how 32bits overflow does no harm here */
1485             value &= (1 << SSCR0_DSS(s->sscr[0])) - 1;
1486
1487         /* Data goes from here to the Tx FIFO and is shifted out from
1488          * there directly to the slave, no need to buffer it.
1489          */
1490         if (s->sscr[0] & SSCR0_SSE) {
1491             uint32_t readval;
1492             if (s->sscr[1] & SSCR1_LBM) {
1493                 readval = value;
1494             } else {
1495                 readval = ssi_transfer(s->bus, value);
1496             }
1497
1498             if (s->rx_level < 0x08) {
1499                 s->rx_fifo[(s->rx_start + s->rx_level++) & 0x7] = readval;
1500             } else {
1501                 s->sssr |= SSSR_ROR;
1502             }
1503         }
1504         strongarm_ssp_fifo_update(s);
1505         break;
1506
1507     default:
1508         printf("%s: Bad register 0x" TARGET_FMT_plx "\n", __func__, addr);
1509         break;
1510     }
1511 }
1512
1513 static const MemoryRegionOps strongarm_ssp_ops = {
1514     .read = strongarm_ssp_read,
1515     .write = strongarm_ssp_write,
1516     .endianness = DEVICE_NATIVE_ENDIAN,
1517 };
1518
1519 static int strongarm_ssp_post_load(void *opaque, int version_id)
1520 {
1521     StrongARMSSPState *s = opaque;
1522
1523     strongarm_ssp_fifo_update(s);
1524
1525     return 0;
1526 }
1527
1528 static void strongarm_ssp_init(Object *obj)
1529 {
1530     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
1531     DeviceState *dev = DEVICE(sbd);
1532     StrongARMSSPState *s = STRONGARM_SSP(dev);
1533
1534     sysbus_init_irq(sbd, &s->irq);
1535
1536     memory_region_init_io(&s->iomem, obj, &strongarm_ssp_ops, s,
1537                           "ssp", 0x1000);
1538     sysbus_init_mmio(sbd, &s->iomem);
1539
1540     s->bus = ssi_create_bus(dev, "ssi");
1541 }
1542
1543 static void strongarm_ssp_reset(DeviceState *dev)
1544 {
1545     StrongARMSSPState *s = STRONGARM_SSP(dev);
1546
1547     s->sssr = 0x03; /* 3 bit data, SPI, disabled */
1548     s->rx_start = 0;
1549     s->rx_level = 0;
1550 }
1551
1552 static const VMStateDescription vmstate_strongarm_ssp_regs = {
1553     .name = "strongarm-ssp",
1554     .version_id = 0,
1555     .minimum_version_id = 0,
1556     .post_load = strongarm_ssp_post_load,
1557     .fields = (VMStateField[]) {
1558         VMSTATE_UINT16_ARRAY(sscr, StrongARMSSPState, 2),
1559         VMSTATE_UINT16(sssr, StrongARMSSPState),
1560         VMSTATE_UINT16_ARRAY(rx_fifo, StrongARMSSPState, 8),
1561         VMSTATE_UINT8(rx_start, StrongARMSSPState),
1562         VMSTATE_UINT8(rx_level, StrongARMSSPState),
1563         VMSTATE_END_OF_LIST(),
1564     },
1565 };
1566
1567 static void strongarm_ssp_class_init(ObjectClass *klass, void *data)
1568 {
1569     DeviceClass *dc = DEVICE_CLASS(klass);
1570
1571     dc->desc = "StrongARM SSP controller";
1572     dc->reset = strongarm_ssp_reset;
1573     dc->vmsd = &vmstate_strongarm_ssp_regs;
1574 }
1575
1576 static const TypeInfo strongarm_ssp_info = {
1577     .name          = TYPE_STRONGARM_SSP,
1578     .parent        = TYPE_SYS_BUS_DEVICE,
1579     .instance_size = sizeof(StrongARMSSPState),
1580     .instance_init = strongarm_ssp_init,
1581     .class_init    = strongarm_ssp_class_init,
1582 };
1583
1584 /* Main CPU functions */
1585 StrongARMState *sa1110_init(MemoryRegion *sysmem,
1586                             unsigned int sdram_size, const char *cpu_type)
1587 {
1588     StrongARMState *s;
1589     int i;
1590
1591     s = g_new0(StrongARMState, 1);
1592
1593     if (strncmp(cpu_type, "sa1110", 6)) {
1594         error_report("Machine requires a SA1110 processor.");
1595         exit(1);
1596     }
1597
1598     s->cpu = ARM_CPU(cpu_create(cpu_type));
1599
1600     memory_region_allocate_system_memory(&s->sdram, NULL, "strongarm.sdram",
1601                                          sdram_size);
1602     memory_region_add_subregion(sysmem, SA_SDCS0, &s->sdram);
1603
1604     s->pic = sysbus_create_varargs("strongarm_pic", 0x90050000,
1605                     qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ),
1606                     qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_FIQ),
1607                     NULL);
1608
1609     sysbus_create_varargs("pxa25x-timer", 0x90000000,
1610                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC0),
1611                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC1),
1612                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC2),
1613                     qdev_get_gpio_in(s->pic, SA_PIC_OSTC3),
1614                     NULL);
1615
1616     sysbus_create_simple(TYPE_STRONGARM_RTC, 0x90010000,
1617                     qdev_get_gpio_in(s->pic, SA_PIC_RTC_ALARM));
1618
1619     s->gpio = strongarm_gpio_init(0x90040000, s->pic);
1620
1621     s->ppc = sysbus_create_varargs(TYPE_STRONGARM_PPC, 0x90060000, NULL);
1622
1623     for (i = 0; sa_serial[i].io_base; i++) {
1624         DeviceState *dev = qdev_create(NULL, TYPE_STRONGARM_UART);
1625         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
1626         qdev_init_nofail(dev);
1627         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0,
1628                 sa_serial[i].io_base);
1629         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
1630                 qdev_get_gpio_in(s->pic, sa_serial[i].irq));
1631     }
1632
1633     s->ssp = sysbus_create_varargs(TYPE_STRONGARM_SSP, 0x80070000,
1634                 qdev_get_gpio_in(s->pic, SA_PIC_SSP), NULL);
1635     s->ssp_bus = (SSIBus *)qdev_get_child_bus(s->ssp, "ssi");
1636
1637     return s;
1638 }
1639
1640 static void strongarm_register_types(void)
1641 {
1642     type_register_static(&strongarm_pic_info);
1643     type_register_static(&strongarm_rtc_sysbus_info);
1644     type_register_static(&strongarm_gpio_info);
1645     type_register_static(&strongarm_ppc_info);
1646     type_register_static(&strongarm_uart_info);
1647     type_register_static(&strongarm_ssp_info);
1648 }
1649
1650 type_init(strongarm_register_types)