hw/timer/twl92230.c

   1 /*
   2  * TI TWL92230C energy-management companion device for the OMAP24xx.
   3  * Aka. Menelaus (N4200 MENELAUS1_V2.2)
   4  *
   5  * Copyright (C) 2008 Nokia Corporation
   6  * Written by Andrzej Zaborowski <andrew@openedhand.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 or
  11  * (at your option) version 3 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "qemu/osdep.h"
  23 #include "qemu-common.h"
  24 #include "qemu/timer.h"
  25 #include "hw/i2c/i2c.h"
  26 #include "hw/irq.h"
  27 #include "migration/qemu-file-types.h"
  28 #include "migration/vmstate.h"
  29 #include "sysemu/sysemu.h"
  30 #include "ui/console.h"
  31 #include "qemu/bcd.h"
  32 #include "qemu/module.h"
  33
  34 #define VERBOSE 1
  35
  36 #define TYPE_TWL92230 "twl92230"
  37 #define TWL92230(obj) OBJECT_CHECK(MenelausState, (obj), TYPE_TWL92230)
  38
  39 typedef struct MenelausState {
  40     I2CSlave parent_obj;
  41
  42     int firstbyte;
  43     uint8_t reg;
  44
  45     uint8_t vcore[5];
  46     uint8_t dcdc[3];
  47     uint8_t ldo[8];
  48     uint8_t sleep[2];
  49     uint8_t osc;
  50     uint8_t detect;
  51     uint16_t mask;
  52     uint16_t status;
  53     uint8_t dir;
  54     uint8_t inputs;
  55     uint8_t outputs;
  56     uint8_t bbsms;
  57     uint8_t pull[4];
  58     uint8_t mmc_ctrl[3];
  59     uint8_t mmc_debounce;
  60     struct {
  61         uint8_t ctrl;
  62         uint16_t comp;
  63         QEMUTimer *hz_tm;
  64         int64_t next;
  65         struct tm tm;
  66         struct tm new;
  67         struct tm alm;
  68         int sec_offset;
  69         int alm_sec;
  70         int next_comp;
  71     } rtc;
  72     uint16_t rtc_next_vmstate;
  73     qemu_irq out[4];
  74     uint8_t pwrbtn_state;
  75 } MenelausState;
  76
  77 static inline void menelaus_update(MenelausState *s)
  78 {
  79     qemu_set_irq(s->out[3], s->status & ~s->mask);
  80 }
  81
  82 static inline void menelaus_rtc_start(MenelausState *s)
  83 {
  84     s->rtc.next += qemu_clock_get_ms(rtc_clock);
  85     timer_mod(s->rtc.hz_tm, s->rtc.next);
  86 }
  87
  88 static inline void menelaus_rtc_stop(MenelausState *s)
  89 {
  90     timer_del(s->rtc.hz_tm);
  91     s->rtc.next -= qemu_clock_get_ms(rtc_clock);
  92     if (s->rtc.next < 1)
  93         s->rtc.next = 1;
  94 }
  95
  96 static void menelaus_rtc_update(MenelausState *s)
  97 {
  98     qemu_get_timedate(&s->rtc.tm, s->rtc.sec_offset);
  99 }
 100
 101 static void menelaus_alm_update(MenelausState *s)
 102 {
 103     if ((s->rtc.ctrl & 3) == 3)
 104         s->rtc.alm_sec = qemu_timedate_diff(&s->rtc.alm) - s->rtc.sec_offset;
 105 }
 106
 107 static void menelaus_rtc_hz(void *opaque)
 108 {
 109     MenelausState *s = (MenelausState *) opaque;
 110
 111     s->rtc.next_comp --;
 112     s->rtc.alm_sec --;
 113     s->rtc.next += 1000;
 114     timer_mod(s->rtc.hz_tm, s->rtc.next);
 115     if ((s->rtc.ctrl >> 3) & 3) {                               /* EVERY */
 116         menelaus_rtc_update(s);
 117         if (((s->rtc.ctrl >> 3) & 3) == 1 && !s->rtc.tm.tm_sec)
 118             s->status |= 1 << 8;                                /* RTCTMR */
 119         else if (((s->rtc.ctrl >> 3) & 3) == 2 && !s->rtc.tm.tm_min)
 120             s->status |= 1 << 8;                                /* RTCTMR */
 121         else if (!s->rtc.tm.tm_hour)
 122             s->status |= 1 << 8;                                /* RTCTMR */
 123     } else
 124         s->status |= 1 << 8;                                    /* RTCTMR */
 125     if ((s->rtc.ctrl >> 1) & 1) {                               /* RTC_AL_EN */
 126         if (s->rtc.alm_sec == 0)
 127             s->status |= 1 << 9;                                /* RTCALM */
 128         /* TODO: wake-up */
 129     }
 130     if (s->rtc.next_comp <= 0) {
 131         s->rtc.next -= muldiv64((int16_t) s->rtc.comp, 1000, 0x8000);
 132         s->rtc.next_comp = 3600;
 133     }
 134     menelaus_update(s);
 135 }
 136
 137 static void menelaus_reset(I2CSlave *i2c)
 138 {
 139     MenelausState *s = TWL92230(i2c);
 140
 141     s->reg = 0x00;
 142
 143     s->vcore[0] = 0x0c; /* XXX: X-loader needs 0x8c? check!  */
 144     s->vcore[1] = 0x05;
 145     s->vcore[2] = 0x02;
 146     s->vcore[3] = 0x0c;
 147     s->vcore[4] = 0x03;
 148     s->dcdc[0] = 0x33;  /* Depends on wiring */
 149     s->dcdc[1] = 0x03;
 150     s->dcdc[2] = 0x00;
 151     s->ldo[0] = 0x95;
 152     s->ldo[1] = 0x7e;
 153     s->ldo[2] = 0x00;
 154     s->ldo[3] = 0x00;   /* Depends on wiring */
 155     s->ldo[4] = 0x03;   /* Depends on wiring */
 156     s->ldo[5] = 0x00;
 157     s->ldo[6] = 0x00;
 158     s->ldo[7] = 0x00;
 159     s->sleep[0] = 0x00;
 160     s->sleep[1] = 0x00;
 161     s->osc = 0x01;
 162     s->detect = 0x09;
 163     s->mask = 0x0fff;
 164     s->status = 0;
 165     s->dir = 0x07;
 166     s->outputs = 0x00;
 167     s->bbsms = 0x00;
 168     s->pull[0] = 0x00;
 169     s->pull[1] = 0x00;
 170     s->pull[2] = 0x00;
 171     s->pull[3] = 0x00;
 172     s->mmc_ctrl[0] = 0x03;
 173     s->mmc_ctrl[1] = 0xc0;
 174     s->mmc_ctrl[2] = 0x00;
 175     s->mmc_debounce = 0x05;
 176
 177     if (s->rtc.ctrl & 1)
 178         menelaus_rtc_stop(s);
 179     s->rtc.ctrl = 0x00;
 180     s->rtc.comp = 0x0000;
 181     s->rtc.next = 1000;
 182     s->rtc.sec_offset = 0;
 183     s->rtc.next_comp = 1800;
 184     s->rtc.alm_sec = 1800;
 185     s->rtc.alm.tm_sec = 0x00;
 186     s->rtc.alm.tm_min = 0x00;
 187     s->rtc.alm.tm_hour = 0x00;
 188     s->rtc.alm.tm_mday = 0x01;
 189     s->rtc.alm.tm_mon = 0x00;
 190     s->rtc.alm.tm_year = 2004;
 191     menelaus_update(s);
 192 }
 193
 194 static void menelaus_gpio_set(void *opaque, int line, int level)
 195 {
 196     MenelausState *s = (MenelausState *) opaque;
 197
 198     if (line < 3) {
 199         /* No interrupt generated */
 200         s->inputs &= ~(1 << line);
 201         s->inputs |= level << line;
 202         return;
 203     }
 204
 205     if (!s->pwrbtn_state && level) {
 206         s->status |= 1 << 11;                                   /* PSHBTN */
 207         menelaus_update(s);
 208     }
 209     s->pwrbtn_state = level;
 210 }
 211
 212 #define MENELAUS_REV            0x01
 213 #define MENELAUS_VCORE_CTRL1    0x02
 214 #define MENELAUS_VCORE_CTRL2    0x03
 215 #define MENELAUS_VCORE_CTRL3    0x04
 216 #define MENELAUS_VCORE_CTRL4    0x05
 217 #define MENELAUS_VCORE_CTRL5    0x06
 218 #define MENELAUS_DCDC_CTRL1     0x07
 219 #define MENELAUS_DCDC_CTRL2     0x08
 220 #define MENELAUS_DCDC_CTRL3     0x09
 221 #define MENELAUS_LDO_CTRL1      0x0a
 222 #define MENELAUS_LDO_CTRL2      0x0b
 223 #define MENELAUS_LDO_CTRL3      0x0c
 224 #define MENELAUS_LDO_CTRL4      0x0d
 225 #define MENELAUS_LDO_CTRL5      0x0e
 226 #define MENELAUS_LDO_CTRL6      0x0f
 227 #define MENELAUS_LDO_CTRL7      0x10
 228 #define MENELAUS_LDO_CTRL8      0x11
 229 #define MENELAUS_SLEEP_CTRL1    0x12
 230 #define MENELAUS_SLEEP_CTRL2    0x13
 231 #define MENELAUS_DEVICE_OFF     0x14
 232 #define MENELAUS_OSC_CTRL       0x15
 233 #define MENELAUS_DETECT_CTRL    0x16
 234 #define MENELAUS_INT_MASK1      0x17
 235 #define MENELAUS_INT_MASK2      0x18
 236 #define MENELAUS_INT_STATUS1    0x19
 237 #define MENELAUS_INT_STATUS2    0x1a
 238 #define MENELAUS_INT_ACK1       0x1b
 239 #define MENELAUS_INT_ACK2       0x1c
 240 #define MENELAUS_GPIO_CTRL      0x1d
 241 #define MENELAUS_GPIO_IN        0x1e
 242 #define MENELAUS_GPIO_OUT       0x1f
 243 #define MENELAUS_BBSMS          0x20
 244 #define MENELAUS_RTC_CTRL       0x21
 245 #define MENELAUS_RTC_UPDATE     0x22
 246 #define MENELAUS_RTC_SEC        0x23
 247 #define MENELAUS_RTC_MIN        0x24
 248 #define MENELAUS_RTC_HR         0x25
 249 #define MENELAUS_RTC_DAY        0x26
 250 #define MENELAUS_RTC_MON        0x27
 251 #define MENELAUS_RTC_YR         0x28
 252 #define MENELAUS_RTC_WKDAY      0x29
 253 #define MENELAUS_RTC_AL_SEC     0x2a
 254 #define MENELAUS_RTC_AL_MIN     0x2b
 255 #define MENELAUS_RTC_AL_HR      0x2c
 256 #define MENELAUS_RTC_AL_DAY     0x2d
 257 #define MENELAUS_RTC_AL_MON     0x2e
 258 #define MENELAUS_RTC_AL_YR      0x2f
 259 #define MENELAUS_RTC_COMP_MSB   0x30
 260 #define MENELAUS_RTC_COMP_LSB   0x31
 261 #define MENELAUS_S1_PULL_EN     0x32
 262 #define MENELAUS_S1_PULL_DIR    0x33
 263 #define MENELAUS_S2_PULL_EN     0x34
 264 #define MENELAUS_S2_PULL_DIR    0x35
 265 #define MENELAUS_MCT_CTRL1      0x36
 266 #define MENELAUS_MCT_CTRL2      0x37
 267 #define MENELAUS_MCT_CTRL3      0x38
 268 #define MENELAUS_MCT_PIN_ST     0x39
 269 #define MENELAUS_DEBOUNCE1      0x3a
 270
 271 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 272 {
 273     MenelausState *s = (MenelausState *) opaque;
 274     int reg = 0;
 275
 276     switch (addr) {
 277     case MENELAUS_REV:
 278         return 0x22;
 279
 280     case MENELAUS_VCORE_CTRL5: reg ++;
 281     case MENELAUS_VCORE_CTRL4: reg ++;
 282     case MENELAUS_VCORE_CTRL3: reg ++;
 283     case MENELAUS_VCORE_CTRL2: reg ++;
 284     case MENELAUS_VCORE_CTRL1:
 285         return s->vcore[reg];
 286
 287     case MENELAUS_DCDC_CTRL3: reg ++;
 288     case MENELAUS_DCDC_CTRL2: reg ++;
 289     case MENELAUS_DCDC_CTRL1:
 290         return s->dcdc[reg];
 291
 292     case MENELAUS_LDO_CTRL8: reg ++;
 293     case MENELAUS_LDO_CTRL7: reg ++;
 294     case MENELAUS_LDO_CTRL6: reg ++;
 295     case MENELAUS_LDO_CTRL5: reg ++;
 296     case MENELAUS_LDO_CTRL4: reg ++;
 297     case MENELAUS_LDO_CTRL3: reg ++;
 298     case MENELAUS_LDO_CTRL2: reg ++;
 299     case MENELAUS_LDO_CTRL1:
 300         return s->ldo[reg];
 301
 302     case MENELAUS_SLEEP_CTRL2: reg ++;
 303     case MENELAUS_SLEEP_CTRL1:
 304         return s->sleep[reg];
 305
 306     case MENELAUS_DEVICE_OFF:
 307         return 0;
 308
 309     case MENELAUS_OSC_CTRL:
 310         return s->osc | (1 << 7);                       /* CLK32K_GOOD */
 311
 312     case MENELAUS_DETECT_CTRL:
 313         return s->detect;
 314
 315     case MENELAUS_INT_MASK1:
 316         return (s->mask >> 0) & 0xff;
 317     case MENELAUS_INT_MASK2:
 318         return (s->mask >> 8) & 0xff;
 319
 320     case MENELAUS_INT_STATUS1:
 321         return (s->status >> 0) & 0xff;
 322     case MENELAUS_INT_STATUS2:
 323         return (s->status >> 8) & 0xff;
 324
 325     case MENELAUS_INT_ACK1:
 326     case MENELAUS_INT_ACK2:
 327         return 0;
 328
 329     case MENELAUS_GPIO_CTRL:
 330         return s->dir;
 331     case MENELAUS_GPIO_IN:
 332         return s->inputs | (~s->dir & s->outputs);
 333     case MENELAUS_GPIO_OUT:
 334         return s->outputs;
 335
 336     case MENELAUS_BBSMS:
 337         return s->bbsms;
 338
 339     case MENELAUS_RTC_CTRL:
 340         return s->rtc.ctrl;
 341     case MENELAUS_RTC_UPDATE:
 342         return 0x00;
 343     case MENELAUS_RTC_SEC:
 344         menelaus_rtc_update(s);
 345         return to_bcd(s->rtc.tm.tm_sec);
 346     case MENELAUS_RTC_MIN:
 347         menelaus_rtc_update(s);
 348         return to_bcd(s->rtc.tm.tm_min);
 349     case MENELAUS_RTC_HR:
 350         menelaus_rtc_update(s);
 351         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 352             return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
 353                     (!!(s->rtc.tm.tm_hour >= 12) << 7); /* PM_nAM */
 354         else
 355             return to_bcd(s->rtc.tm.tm_hour);
 356     case MENELAUS_RTC_DAY:
 357         menelaus_rtc_update(s);
 358         return to_bcd(s->rtc.tm.tm_mday);
 359     case MENELAUS_RTC_MON:
 360         menelaus_rtc_update(s);
 361         return to_bcd(s->rtc.tm.tm_mon + 1);
 362     case MENELAUS_RTC_YR:
 363         menelaus_rtc_update(s);
 364         return to_bcd(s->rtc.tm.tm_year - 2000);
 365     case MENELAUS_RTC_WKDAY:
 366         menelaus_rtc_update(s);
 367         return to_bcd(s->rtc.tm.tm_wday);
 368     case MENELAUS_RTC_AL_SEC:
 369         return to_bcd(s->rtc.alm.tm_sec);
 370     case MENELAUS_RTC_AL_MIN:
 371         return to_bcd(s->rtc.alm.tm_min);
 372     case MENELAUS_RTC_AL_HR:
 373         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 374             return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
 375                     (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
 376         else
 377             return to_bcd(s->rtc.alm.tm_hour);
 378     case MENELAUS_RTC_AL_DAY:
 379         return to_bcd(s->rtc.alm.tm_mday);
 380     case MENELAUS_RTC_AL_MON:
 381         return to_bcd(s->rtc.alm.tm_mon + 1);
 382     case MENELAUS_RTC_AL_YR:
 383         return to_bcd(s->rtc.alm.tm_year - 2000);
 384     case MENELAUS_RTC_COMP_MSB:
 385         return (s->rtc.comp >> 8) & 0xff;
 386     case MENELAUS_RTC_COMP_LSB:
 387         return (s->rtc.comp >> 0) & 0xff;
 388
 389     case MENELAUS_S1_PULL_EN:
 390         return s->pull[0];
 391     case MENELAUS_S1_PULL_DIR:
 392         return s->pull[1];
 393     case MENELAUS_S2_PULL_EN:
 394         return s->pull[2];
 395     case MENELAUS_S2_PULL_DIR:
 396         return s->pull[3];
 397
 398     case MENELAUS_MCT_CTRL3: reg ++;
 399     case MENELAUS_MCT_CTRL2: reg ++;
 400     case MENELAUS_MCT_CTRL1:
 401         return s->mmc_ctrl[reg];
 402     case MENELAUS_MCT_PIN_ST:
 403         /* TODO: return the real Card Detect */
 404         return 0;
 405     case MENELAUS_DEBOUNCE1:
 406         return s->mmc_debounce;
 407
 408     default:
 409 #ifdef VERBOSE
 410         printf("%s: unknown register %02x\n", __func__, addr);
 411 #endif
 412         break;
 413     }
 414     return 0;
 415 }
 416
 417 static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 418 {
 419     MenelausState *s = (MenelausState *) opaque;
 420     int line;
 421     int reg = 0;
 422     struct tm tm;
 423
 424     switch (addr) {
 425     case MENELAUS_VCORE_CTRL1:
 426         s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
 427         break;
 428     case MENELAUS_VCORE_CTRL2:
 429         s->vcore[1] = value;
 430         break;
 431     case MENELAUS_VCORE_CTRL3:
 432         s->vcore[2] = MIN(value & 0x1f, 0x12);
 433         break;
 434     case MENELAUS_VCORE_CTRL4:
 435         s->vcore[3] = MIN(value & 0x1f, 0x12);
 436         break;
 437     case MENELAUS_VCORE_CTRL5:
 438         s->vcore[4] = value & 3;
 439         /* XXX
 440          * auto set to 3 on M_Active, nRESWARM
 441          * auto set to 0 on M_WaitOn, M_Backup
 442          */
 443         break;
 444
 445     case MENELAUS_DCDC_CTRL1:
 446         s->dcdc[0] = value & 0x3f;
 447         break;
 448     case MENELAUS_DCDC_CTRL2:
 449         s->dcdc[1] = value & 0x07;
 450         /* XXX
 451          * auto set to 3 on M_Active, nRESWARM
 452          * auto set to 0 on M_WaitOn, M_Backup
 453          */
 454         break;
 455     case MENELAUS_DCDC_CTRL3:
 456         s->dcdc[2] = value & 0x07;
 457         break;
 458
 459     case MENELAUS_LDO_CTRL1:
 460         s->ldo[0] = value;
 461         break;
 462     case MENELAUS_LDO_CTRL2:
 463         s->ldo[1] = value & 0x7f;
 464         /* XXX
 465          * auto set to 0x7e on M_WaitOn, M_Backup
 466          */
 467         break;
 468     case MENELAUS_LDO_CTRL3:
 469         s->ldo[2] = value & 3;
 470         /* XXX
 471          * auto set to 3 on M_Active, nRESWARM
 472          * auto set to 0 on M_WaitOn, M_Backup
 473          */
 474         break;
 475     case MENELAUS_LDO_CTRL4:
 476         s->ldo[3] = value & 3;
 477         /* XXX
 478          * auto set to 3 on M_Active, nRESWARM
 479          * auto set to 0 on M_WaitOn, M_Backup
 480          */
 481         break;
 482     case MENELAUS_LDO_CTRL5:
 483         s->ldo[4] = value & 3;
 484         /* XXX
 485          * auto set to 3 on M_Active, nRESWARM
 486          * auto set to 0 on M_WaitOn, M_Backup
 487          */
 488         break;
 489     case MENELAUS_LDO_CTRL6:
 490         s->ldo[5] = value & 3;
 491         break;
 492     case MENELAUS_LDO_CTRL7:
 493         s->ldo[6] = value & 3;
 494         break;
 495     case MENELAUS_LDO_CTRL8:
 496         s->ldo[7] = value & 3;
 497         break;
 498
 499     case MENELAUS_SLEEP_CTRL2: reg ++;
 500     case MENELAUS_SLEEP_CTRL1:
 501         s->sleep[reg] = value;
 502         break;
 503
 504     case MENELAUS_DEVICE_OFF:
 505         if (value & 1) {
 506             menelaus_reset(I2C_SLAVE(s));
 507         }
 508         break;
 509
 510     case MENELAUS_OSC_CTRL:
 511         s->osc = value & 7;
 512         break;
 513
 514     case MENELAUS_DETECT_CTRL:
 515         s->detect = value & 0x7f;
 516         break;
 517
 518     case MENELAUS_INT_MASK1:
 519         s->mask &= 0xf00;
 520         s->mask |= value << 0;
 521         menelaus_update(s);
 522         break;
 523     case MENELAUS_INT_MASK2:
 524         s->mask &= 0x0ff;
 525         s->mask |= value << 8;
 526         menelaus_update(s);
 527         break;
 528
 529     case MENELAUS_INT_ACK1:
 530         s->status &= ~(((uint16_t) value) << 0);
 531         menelaus_update(s);
 532         break;
 533     case MENELAUS_INT_ACK2:
 534         s->status &= ~(((uint16_t) value) << 8);
 535         menelaus_update(s);
 536         break;
 537
 538     case MENELAUS_GPIO_CTRL:
 539         for (line = 0; line < 3; line ++) {
 540             if (((s->dir ^ value) >> line) & 1) {
 541                 qemu_set_irq(s->out[line],
 542                              ((s->outputs & ~s->dir) >> line) & 1);
 543             }
 544         }
 545         s->dir = value & 0x67;
 546         break;
 547     case MENELAUS_GPIO_OUT:
 548         for (line = 0; line < 3; line ++) {
 549             if ((((s->outputs ^ value) & ~s->dir) >> line) & 1) {
 550                 qemu_set_irq(s->out[line], (s->outputs >> line) & 1);
 551             }
 552         }
 553         s->outputs = value & 0x07;
 554         break;
 555
 556     case MENELAUS_BBSMS:
 557         s->bbsms = 0x0d;
 558         break;
 559
 560     case MENELAUS_RTC_CTRL:
 561         if ((s->rtc.ctrl ^ value) & 1) {                        /* RTC_EN */
 562             if (value & 1)
 563                 menelaus_rtc_start(s);
 564             else
 565                 menelaus_rtc_stop(s);
 566         }
 567         s->rtc.ctrl = value & 0x1f;
 568         menelaus_alm_update(s);
 569         break;
 570     case MENELAUS_RTC_UPDATE:
 571         menelaus_rtc_update(s);
 572         memcpy(&tm, &s->rtc.tm, sizeof(tm));
 573         switch (value & 0xf) {
 574         case 0:
 575             break;
 576         case 1:
 577             tm.tm_sec = s->rtc.new.tm_sec;
 578             break;
 579         case 2:
 580             tm.tm_min = s->rtc.new.tm_min;
 581             break;
 582         case 3:
 583             if (s->rtc.new.tm_hour > 23)
 584                 goto rtc_badness;
 585             tm.tm_hour = s->rtc.new.tm_hour;
 586             break;
 587         case 4:
 588             if (s->rtc.new.tm_mday < 1)
 589                 goto rtc_badness;
 590             /* TODO check range */
 591             tm.tm_mday = s->rtc.new.tm_mday;
 592             break;
 593         case 5:
 594             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 595                 goto rtc_badness;
 596             tm.tm_mon = s->rtc.new.tm_mon;
 597             break;
 598         case 6:
 599             tm.tm_year = s->rtc.new.tm_year;
 600             break;
 601         case 7:
 602             /* TODO set .tm_mday instead */
 603             tm.tm_wday = s->rtc.new.tm_wday;
 604             break;
 605         case 8:
 606             if (s->rtc.new.tm_hour > 23)
 607                 goto rtc_badness;
 608             if (s->rtc.new.tm_mday < 1)
 609                 goto rtc_badness;
 610             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 611                 goto rtc_badness;
 612             tm.tm_sec = s->rtc.new.tm_sec;
 613             tm.tm_min = s->rtc.new.tm_min;
 614             tm.tm_hour = s->rtc.new.tm_hour;
 615             tm.tm_mday = s->rtc.new.tm_mday;
 616             tm.tm_mon = s->rtc.new.tm_mon;
 617             tm.tm_year = s->rtc.new.tm_year;
 618             break;
 619         rtc_badness:
 620         default:
 621             fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
 622                             __func__, value);
 623             s->status |= 1 << 10;                               /* RTCERR */
 624             menelaus_update(s);
 625         }
 626         s->rtc.sec_offset = qemu_timedate_diff(&tm);
 627         break;
 628     case MENELAUS_RTC_SEC:
 629         s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
 630         break;
 631     case MENELAUS_RTC_MIN:
 632         s->rtc.tm.tm_min = from_bcd(value & 0x7f);
 633         break;
 634     case MENELAUS_RTC_HR:
 635         s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?  /* MODE12_n24 */
 636                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 637                 from_bcd(value & 0x3f);
 638         break;
 639     case MENELAUS_RTC_DAY:
 640         s->rtc.tm.tm_mday = from_bcd(value);
 641         break;
 642     case MENELAUS_RTC_MON:
 643         s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
 644         break;
 645     case MENELAUS_RTC_YR:
 646         s->rtc.tm.tm_year = 2000 + from_bcd(value);
 647         break;
 648     case MENELAUS_RTC_WKDAY:
 649         s->rtc.tm.tm_mday = from_bcd(value);
 650         break;
 651     case MENELAUS_RTC_AL_SEC:
 652         s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
 653         menelaus_alm_update(s);
 654         break;
 655     case MENELAUS_RTC_AL_MIN:
 656         s->rtc.alm.tm_min = from_bcd(value & 0x7f);
 657         menelaus_alm_update(s);
 658         break;
 659     case MENELAUS_RTC_AL_HR:
 660         s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ? /* MODE12_n24 */
 661                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 662                 from_bcd(value & 0x3f);
 663         menelaus_alm_update(s);
 664         break;
 665     case MENELAUS_RTC_AL_DAY:
 666         s->rtc.alm.tm_mday = from_bcd(value);
 667         menelaus_alm_update(s);
 668         break;
 669     case MENELAUS_RTC_AL_MON:
 670         s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
 671         menelaus_alm_update(s);
 672         break;
 673     case MENELAUS_RTC_AL_YR:
 674         s->rtc.alm.tm_year = 2000 + from_bcd(value);
 675         menelaus_alm_update(s);
 676         break;
 677     case MENELAUS_RTC_COMP_MSB:
 678         s->rtc.comp &= 0xff;
 679         s->rtc.comp |= value << 8;
 680         break;
 681     case MENELAUS_RTC_COMP_LSB:
 682         s->rtc.comp &= 0xff << 8;
 683         s->rtc.comp |= value;
 684         break;
 685
 686     case MENELAUS_S1_PULL_EN:
 687         s->pull[0] = value;
 688         break;
 689     case MENELAUS_S1_PULL_DIR:
 690         s->pull[1] = value & 0x1f;
 691         break;
 692     case MENELAUS_S2_PULL_EN:
 693         s->pull[2] = value;
 694         break;
 695     case MENELAUS_S2_PULL_DIR:
 696         s->pull[3] = value & 0x1f;
 697         break;
 698
 699     case MENELAUS_MCT_CTRL1:
 700         s->mmc_ctrl[0] = value & 0x7f;
 701         break;
 702     case MENELAUS_MCT_CTRL2:
 703         s->mmc_ctrl[1] = value;
 704         /* TODO update Card Detect interrupts */
 705         break;
 706     case MENELAUS_MCT_CTRL3:
 707         s->mmc_ctrl[2] = value & 0xf;
 708         break;
 709     case MENELAUS_DEBOUNCE1:
 710         s->mmc_debounce = value & 0x3f;
 711         break;
 712
 713     default:
 714 #ifdef VERBOSE
 715         printf("%s: unknown register %02x\n", __func__, addr);
 716 #endif
 717     }
 718 }
 719
 720 static int menelaus_event(I2CSlave *i2c, enum i2c_event event)
 721 {
 722     MenelausState *s = TWL92230(i2c);
 723
 724     if (event == I2C_START_SEND)
 725         s->firstbyte = 1;
 726
 727     return 0;
 728 }
 729
 730 static int menelaus_tx(I2CSlave *i2c, uint8_t data)
 731 {
 732     MenelausState *s = TWL92230(i2c);
 733
 734     /* Interpret register address byte */
 735     if (s->firstbyte) {
 736         s->reg = data;
 737         s->firstbyte = 0;
 738     } else
 739         menelaus_write(s, s->reg ++, data);
 740
 741     return 0;
 742 }
 743
 744 static uint8_t menelaus_rx(I2CSlave *i2c)
 745 {
 746     MenelausState *s = TWL92230(i2c);
 747
 748     return menelaus_read(s, s->reg ++);
 749 }
 750
 751 /* Save restore 32 bit int as uint16_t
 752    This is a Big hack, but it is how the old state did it.
 753    Or we broke compatibility in the state, or we can't use struct tm
 754  */
 755
 756 static int get_int32_as_uint16(QEMUFile *f, void *pv, size_t size,
 757                                const VMStateField *field)
 758 {
 759     int *v = pv;
 760     *v = qemu_get_be16(f);
 761     return 0;
 762 }
 763
 764 static int put_int32_as_uint16(QEMUFile *f, void *pv, size_t size,
 765                                const VMStateField *field, QJSON *vmdesc)
 766 {
 767     int *v = pv;
 768     qemu_put_be16(f, *v);
 769
 770     return 0;
 771 }
 772
 773 static const VMStateInfo vmstate_hack_int32_as_uint16 = {
 774     .name = "int32_as_uint16",
 775     .get  = get_int32_as_uint16,
 776     .put  = put_int32_as_uint16,
 777 };
 778
 779 #define VMSTATE_UINT16_HACK(_f, _s)                                  \
 780     VMSTATE_SINGLE(_f, _s, 0, vmstate_hack_int32_as_uint16, int32_t)
 781
 782
 783 static const VMStateDescription vmstate_menelaus_tm = {
 784     .name = "menelaus_tm",
 785     .version_id = 0,
 786     .minimum_version_id = 0,
 787     .fields = (VMStateField[]) {
 788         VMSTATE_UINT16_HACK(tm_sec, struct tm),
 789         VMSTATE_UINT16_HACK(tm_min, struct tm),
 790         VMSTATE_UINT16_HACK(tm_hour, struct tm),
 791         VMSTATE_UINT16_HACK(tm_mday, struct tm),
 792         VMSTATE_UINT16_HACK(tm_min, struct tm),
 793         VMSTATE_UINT16_HACK(tm_year, struct tm),
 794         VMSTATE_END_OF_LIST()
 795     }
 796 };
 797
 798 static int menelaus_pre_save(void *opaque)
 799 {
 800     MenelausState *s = opaque;
 801     /* Should be <= 1000 */
 802     s->rtc_next_vmstate =  s->rtc.next - qemu_clock_get_ms(rtc_clock);
 803
 804     return 0;
 805 }
 806
 807 static int menelaus_post_load(void *opaque, int version_id)
 808 {
 809     MenelausState *s = opaque;
 810
 811     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 812         menelaus_rtc_stop(s);
 813
 814     s->rtc.next = s->rtc_next_vmstate;
 815
 816     menelaus_alm_update(s);
 817     menelaus_update(s);
 818     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 819         menelaus_rtc_start(s);
 820     return 0;
 821 }
 822
 823 static const VMStateDescription vmstate_menelaus = {
 824     .name = "menelaus",
 825     .version_id = 0,
 826     .minimum_version_id = 0,
 827     .pre_save = menelaus_pre_save,
 828     .post_load = menelaus_post_load,
 829     .fields = (VMStateField[]) {
 830         VMSTATE_INT32(firstbyte, MenelausState),
 831         VMSTATE_UINT8(reg, MenelausState),
 832         VMSTATE_UINT8_ARRAY(vcore, MenelausState, 5),
 833         VMSTATE_UINT8_ARRAY(dcdc, MenelausState, 3),
 834         VMSTATE_UINT8_ARRAY(ldo, MenelausState, 8),
 835         VMSTATE_UINT8_ARRAY(sleep, MenelausState, 2),
 836         VMSTATE_UINT8(osc, MenelausState),
 837         VMSTATE_UINT8(detect, MenelausState),
 838         VMSTATE_UINT16(mask, MenelausState),
 839         VMSTATE_UINT16(status, MenelausState),
 840         VMSTATE_UINT8(dir, MenelausState),
 841         VMSTATE_UINT8(inputs, MenelausState),
 842         VMSTATE_UINT8(outputs, MenelausState),
 843         VMSTATE_UINT8(bbsms, MenelausState),
 844         VMSTATE_UINT8_ARRAY(pull, MenelausState, 4),
 845         VMSTATE_UINT8_ARRAY(mmc_ctrl, MenelausState, 3),
 846         VMSTATE_UINT8(mmc_debounce, MenelausState),
 847         VMSTATE_UINT8(rtc.ctrl, MenelausState),
 848         VMSTATE_UINT16(rtc.comp, MenelausState),
 849         VMSTATE_UINT16(rtc_next_vmstate, MenelausState),
 850         VMSTATE_STRUCT(rtc.new, MenelausState, 0, vmstate_menelaus_tm,
 851                        struct tm),
 852         VMSTATE_STRUCT(rtc.alm, MenelausState, 0, vmstate_menelaus_tm,
 853                        struct tm),
 854         VMSTATE_UINT8(pwrbtn_state, MenelausState),
 855         VMSTATE_I2C_SLAVE(parent_obj, MenelausState),
 856         VMSTATE_END_OF_LIST()
 857     }
 858 };
 859
 860 static void twl92230_realize(DeviceState *dev, Error **errp)
 861 {
 862     MenelausState *s = TWL92230(dev);
 863
 864     s->rtc.hz_tm = timer_new_ms(rtc_clock, menelaus_rtc_hz, s);
 865     /* Three output pins plus one interrupt pin.  */
 866     qdev_init_gpio_out(dev, s->out, 4);
 867
 868     /* Three input pins plus one power-button pin.  */
 869     qdev_init_gpio_in(dev, menelaus_gpio_set, 4);
 870
 871     menelaus_reset(I2C_SLAVE(dev));
 872 }
 873
 874 static void twl92230_class_init(ObjectClass *klass, void *data)
 875 {
 876     DeviceClass *dc = DEVICE_CLASS(klass);
 877     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 878
 879     dc->realize = twl92230_realize;
 880     sc->event = menelaus_event;
 881     sc->recv = menelaus_rx;
 882     sc->send = menelaus_tx;
 883     dc->vmsd = &vmstate_menelaus;
 884 }
 885
 886 static const TypeInfo twl92230_info = {
 887     .name          = TYPE_TWL92230,
 888     .parent        = TYPE_I2C_SLAVE,
 889     .instance_size = sizeof(MenelausState),
 890     .class_init    = twl92230_class_init,
 891 };
 892
 893 static void twl92230_register_types(void)
 894 {
 895     type_register_static(&twl92230_info);
 896 }
 897
 898 type_init(twl92230_register_types)