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 "hw/hw.h"
  23 #include "qemu/timer.h"
  24 #include "hw/i2c/i2c.h"
  25 #include "sysemu/sysemu.h"
  26 #include "ui/console.h"
  27
  28 #define VERBOSE 1
  29
  30 typedef struct {
  31     I2CSlave i2c;
  32
  33     int firstbyte;
  34     uint8_t reg;
  35
  36     uint8_t vcore[5];
  37     uint8_t dcdc[3];
  38     uint8_t ldo[8];
  39     uint8_t sleep[2];
  40     uint8_t osc;
  41     uint8_t detect;
  42     uint16_t mask;
  43     uint16_t status;
  44     uint8_t dir;
  45     uint8_t inputs;
  46     uint8_t outputs;
  47     uint8_t bbsms;
  48     uint8_t pull[4];
  49     uint8_t mmc_ctrl[3];
  50     uint8_t mmc_debounce;
  51     struct {
  52         uint8_t ctrl;
  53         uint16_t comp;
  54         QEMUTimer *hz_tm;
  55         int64_t next;
  56         struct tm tm;
  57         struct tm new;
  58         struct tm alm;
  59         int sec_offset;
  60         int alm_sec;
  61         int next_comp;
  62     } rtc;
  63     uint16_t rtc_next_vmstate;
  64     qemu_irq out[4];
  65     uint8_t pwrbtn_state;
  66 } MenelausState;
  67
  68 static inline void menelaus_update(MenelausState *s)
  69 {
  70     qemu_set_irq(s->out[3], s->status & ~s->mask);
  71 }
  72
  73 static inline void menelaus_rtc_start(MenelausState *s)
  74 {
  75     s->rtc.next += qemu_get_clock_ms(rtc_clock);
  76     qemu_mod_timer(s->rtc.hz_tm, s->rtc.next);
  77 }
  78
  79 static inline void menelaus_rtc_stop(MenelausState *s)
  80 {
  81     qemu_del_timer(s->rtc.hz_tm);
  82     s->rtc.next -= qemu_get_clock_ms(rtc_clock);
  83     if (s->rtc.next < 1)
  84         s->rtc.next = 1;
  85 }
  86
  87 static void menelaus_rtc_update(MenelausState *s)
  88 {
  89     qemu_get_timedate(&s->rtc.tm, s->rtc.sec_offset);
  90 }
  91
  92 static void menelaus_alm_update(MenelausState *s)
  93 {
  94     if ((s->rtc.ctrl & 3) == 3)
  95         s->rtc.alm_sec = qemu_timedate_diff(&s->rtc.alm) - s->rtc.sec_offset;
  96 }
  97
  98 static void menelaus_rtc_hz(void *opaque)
  99 {
 100     MenelausState *s = (MenelausState *) opaque;
 101
 102     s->rtc.next_comp --;
 103     s->rtc.alm_sec --;
 104     s->rtc.next += 1000;
 105     qemu_mod_timer(s->rtc.hz_tm, s->rtc.next);
 106     if ((s->rtc.ctrl >> 3) & 3) {                               /* EVERY */
 107         menelaus_rtc_update(s);
 108         if (((s->rtc.ctrl >> 3) & 3) == 1 && !s->rtc.tm.tm_sec)
 109             s->status |= 1 << 8;                                /* RTCTMR */
 110         else if (((s->rtc.ctrl >> 3) & 3) == 2 && !s->rtc.tm.tm_min)
 111             s->status |= 1 << 8;                                /* RTCTMR */
 112         else if (!s->rtc.tm.tm_hour)
 113             s->status |= 1 << 8;                                /* RTCTMR */
 114     } else
 115         s->status |= 1 << 8;                                    /* RTCTMR */
 116     if ((s->rtc.ctrl >> 1) & 1) {                               /* RTC_AL_EN */
 117         if (s->rtc.alm_sec == 0)
 118             s->status |= 1 << 9;                                /* RTCALM */
 119         /* TODO: wake-up */
 120     }
 121     if (s->rtc.next_comp <= 0) {
 122         s->rtc.next -= muldiv64((int16_t) s->rtc.comp, 1000, 0x8000);
 123         s->rtc.next_comp = 3600;
 124     }
 125     menelaus_update(s);
 126 }
 127
 128 static void menelaus_reset(I2CSlave *i2c)
 129 {
 130     MenelausState *s = (MenelausState *) i2c;
 131     s->reg = 0x00;
 132
 133     s->vcore[0] = 0x0c; /* XXX: X-loader needs 0x8c? check!  */
 134     s->vcore[1] = 0x05;
 135     s->vcore[2] = 0x02;
 136     s->vcore[3] = 0x0c;
 137     s->vcore[4] = 0x03;
 138     s->dcdc[0] = 0x33;  /* Depends on wiring */
 139     s->dcdc[1] = 0x03;
 140     s->dcdc[2] = 0x00;
 141     s->ldo[0] = 0x95;
 142     s->ldo[1] = 0x7e;
 143     s->ldo[2] = 0x00;
 144     s->ldo[3] = 0x00;   /* Depends on wiring */
 145     s->ldo[4] = 0x03;   /* Depends on wiring */
 146     s->ldo[5] = 0x00;
 147     s->ldo[6] = 0x00;
 148     s->ldo[7] = 0x00;
 149     s->sleep[0] = 0x00;
 150     s->sleep[1] = 0x00;
 151     s->osc = 0x01;
 152     s->detect = 0x09;
 153     s->mask = 0x0fff;
 154     s->status = 0;
 155     s->dir = 0x07;
 156     s->outputs = 0x00;
 157     s->bbsms = 0x00;
 158     s->pull[0] = 0x00;
 159     s->pull[1] = 0x00;
 160     s->pull[2] = 0x00;
 161     s->pull[3] = 0x00;
 162     s->mmc_ctrl[0] = 0x03;
 163     s->mmc_ctrl[1] = 0xc0;
 164     s->mmc_ctrl[2] = 0x00;
 165     s->mmc_debounce = 0x05;
 166
 167     if (s->rtc.ctrl & 1)
 168         menelaus_rtc_stop(s);
 169     s->rtc.ctrl = 0x00;
 170     s->rtc.comp = 0x0000;
 171     s->rtc.next = 1000;
 172     s->rtc.sec_offset = 0;
 173     s->rtc.next_comp = 1800;
 174     s->rtc.alm_sec = 1800;
 175     s->rtc.alm.tm_sec = 0x00;
 176     s->rtc.alm.tm_min = 0x00;
 177     s->rtc.alm.tm_hour = 0x00;
 178     s->rtc.alm.tm_mday = 0x01;
 179     s->rtc.alm.tm_mon = 0x00;
 180     s->rtc.alm.tm_year = 2004;
 181     menelaus_update(s);
 182 }
 183
 184 static void menelaus_gpio_set(void *opaque, int line, int level)
 185 {
 186     MenelausState *s = (MenelausState *) opaque;
 187
 188     if (line < 3) {
 189         /* No interrupt generated */
 190         s->inputs &= ~(1 << line);
 191         s->inputs |= level << line;
 192         return;
 193     }
 194
 195     if (!s->pwrbtn_state && level) {
 196         s->status |= 1 << 11;                                   /* PSHBTN */
 197         menelaus_update(s);
 198     }
 199     s->pwrbtn_state = level;
 200 }
 201
 202 #define MENELAUS_REV            0x01
 203 #define MENELAUS_VCORE_CTRL1    0x02
 204 #define MENELAUS_VCORE_CTRL2    0x03
 205 #define MENELAUS_VCORE_CTRL3    0x04
 206 #define MENELAUS_VCORE_CTRL4    0x05
 207 #define MENELAUS_VCORE_CTRL5    0x06
 208 #define MENELAUS_DCDC_CTRL1     0x07
 209 #define MENELAUS_DCDC_CTRL2     0x08
 210 #define MENELAUS_DCDC_CTRL3     0x09
 211 #define MENELAUS_LDO_CTRL1      0x0a
 212 #define MENELAUS_LDO_CTRL2      0x0b
 213 #define MENELAUS_LDO_CTRL3      0x0c
 214 #define MENELAUS_LDO_CTRL4      0x0d
 215 #define MENELAUS_LDO_CTRL5      0x0e
 216 #define MENELAUS_LDO_CTRL6      0x0f
 217 #define MENELAUS_LDO_CTRL7      0x10
 218 #define MENELAUS_LDO_CTRL8      0x11
 219 #define MENELAUS_SLEEP_CTRL1    0x12
 220 #define MENELAUS_SLEEP_CTRL2    0x13
 221 #define MENELAUS_DEVICE_OFF     0x14
 222 #define MENELAUS_OSC_CTRL       0x15
 223 #define MENELAUS_DETECT_CTRL    0x16
 224 #define MENELAUS_INT_MASK1      0x17
 225 #define MENELAUS_INT_MASK2      0x18
 226 #define MENELAUS_INT_STATUS1    0x19
 227 #define MENELAUS_INT_STATUS2    0x1a
 228 #define MENELAUS_INT_ACK1       0x1b
 229 #define MENELAUS_INT_ACK2       0x1c
 230 #define MENELAUS_GPIO_CTRL      0x1d
 231 #define MENELAUS_GPIO_IN        0x1e
 232 #define MENELAUS_GPIO_OUT       0x1f
 233 #define MENELAUS_BBSMS          0x20
 234 #define MENELAUS_RTC_CTRL       0x21
 235 #define MENELAUS_RTC_UPDATE     0x22
 236 #define MENELAUS_RTC_SEC        0x23
 237 #define MENELAUS_RTC_MIN        0x24
 238 #define MENELAUS_RTC_HR         0x25
 239 #define MENELAUS_RTC_DAY        0x26
 240 #define MENELAUS_RTC_MON        0x27
 241 #define MENELAUS_RTC_YR         0x28
 242 #define MENELAUS_RTC_WKDAY      0x29
 243 #define MENELAUS_RTC_AL_SEC     0x2a
 244 #define MENELAUS_RTC_AL_MIN     0x2b
 245 #define MENELAUS_RTC_AL_HR      0x2c
 246 #define MENELAUS_RTC_AL_DAY     0x2d
 247 #define MENELAUS_RTC_AL_MON     0x2e
 248 #define MENELAUS_RTC_AL_YR      0x2f
 249 #define MENELAUS_RTC_COMP_MSB   0x30
 250 #define MENELAUS_RTC_COMP_LSB   0x31
 251 #define MENELAUS_S1_PULL_EN     0x32
 252 #define MENELAUS_S1_PULL_DIR    0x33
 253 #define MENELAUS_S2_PULL_EN     0x34
 254 #define MENELAUS_S2_PULL_DIR    0x35
 255 #define MENELAUS_MCT_CTRL1      0x36
 256 #define MENELAUS_MCT_CTRL2      0x37
 257 #define MENELAUS_MCT_CTRL3      0x38
 258 #define MENELAUS_MCT_PIN_ST     0x39
 259 #define MENELAUS_DEBOUNCE1      0x3a
 260
 261 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 262 {
 263     MenelausState *s = (MenelausState *) opaque;
 264     int reg = 0;
 265
 266     switch (addr) {
 267     case MENELAUS_REV:
 268         return 0x22;
 269
 270     case MENELAUS_VCORE_CTRL5: reg ++;
 271     case MENELAUS_VCORE_CTRL4: reg ++;
 272     case MENELAUS_VCORE_CTRL3: reg ++;
 273     case MENELAUS_VCORE_CTRL2: reg ++;
 274     case MENELAUS_VCORE_CTRL1:
 275         return s->vcore[reg];
 276
 277     case MENELAUS_DCDC_CTRL3: reg ++;
 278     case MENELAUS_DCDC_CTRL2: reg ++;
 279     case MENELAUS_DCDC_CTRL1:
 280         return s->dcdc[reg];
 281
 282     case MENELAUS_LDO_CTRL8: reg ++;
 283     case MENELAUS_LDO_CTRL7: reg ++;
 284     case MENELAUS_LDO_CTRL6: reg ++;
 285     case MENELAUS_LDO_CTRL5: reg ++;
 286     case MENELAUS_LDO_CTRL4: reg ++;
 287     case MENELAUS_LDO_CTRL3: reg ++;
 288     case MENELAUS_LDO_CTRL2: reg ++;
 289     case MENELAUS_LDO_CTRL1:
 290         return s->ldo[reg];
 291
 292     case MENELAUS_SLEEP_CTRL2: reg ++;
 293     case MENELAUS_SLEEP_CTRL1:
 294         return s->sleep[reg];
 295
 296     case MENELAUS_DEVICE_OFF:
 297         return 0;
 298
 299     case MENELAUS_OSC_CTRL:
 300         return s->osc | (1 << 7);                       /* CLK32K_GOOD */
 301
 302     case MENELAUS_DETECT_CTRL:
 303         return s->detect;
 304
 305     case MENELAUS_INT_MASK1:
 306         return (s->mask >> 0) & 0xff;
 307     case MENELAUS_INT_MASK2:
 308         return (s->mask >> 8) & 0xff;
 309
 310     case MENELAUS_INT_STATUS1:
 311         return (s->status >> 0) & 0xff;
 312     case MENELAUS_INT_STATUS2:
 313         return (s->status >> 8) & 0xff;
 314
 315     case MENELAUS_INT_ACK1:
 316     case MENELAUS_INT_ACK2:
 317         return 0;
 318
 319     case MENELAUS_GPIO_CTRL:
 320         return s->dir;
 321     case MENELAUS_GPIO_IN:
 322         return s->inputs | (~s->dir & s->outputs);
 323     case MENELAUS_GPIO_OUT:
 324         return s->outputs;
 325
 326     case MENELAUS_BBSMS:
 327         return s->bbsms;
 328
 329     case MENELAUS_RTC_CTRL:
 330         return s->rtc.ctrl;
 331     case MENELAUS_RTC_UPDATE:
 332         return 0x00;
 333     case MENELAUS_RTC_SEC:
 334         menelaus_rtc_update(s);
 335         return to_bcd(s->rtc.tm.tm_sec);
 336     case MENELAUS_RTC_MIN:
 337         menelaus_rtc_update(s);
 338         return to_bcd(s->rtc.tm.tm_min);
 339     case MENELAUS_RTC_HR:
 340         menelaus_rtc_update(s);
 341         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 342             return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
 343                     (!!(s->rtc.tm.tm_hour >= 12) << 7); /* PM_nAM */
 344         else
 345             return to_bcd(s->rtc.tm.tm_hour);
 346     case MENELAUS_RTC_DAY:
 347         menelaus_rtc_update(s);
 348         return to_bcd(s->rtc.tm.tm_mday);
 349     case MENELAUS_RTC_MON:
 350         menelaus_rtc_update(s);
 351         return to_bcd(s->rtc.tm.tm_mon + 1);
 352     case MENELAUS_RTC_YR:
 353         menelaus_rtc_update(s);
 354         return to_bcd(s->rtc.tm.tm_year - 2000);
 355     case MENELAUS_RTC_WKDAY:
 356         menelaus_rtc_update(s);
 357         return to_bcd(s->rtc.tm.tm_wday);
 358     case MENELAUS_RTC_AL_SEC:
 359         return to_bcd(s->rtc.alm.tm_sec);
 360     case MENELAUS_RTC_AL_MIN:
 361         return to_bcd(s->rtc.alm.tm_min);
 362     case MENELAUS_RTC_AL_HR:
 363         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 364             return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
 365                     (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
 366         else
 367             return to_bcd(s->rtc.alm.tm_hour);
 368     case MENELAUS_RTC_AL_DAY:
 369         return to_bcd(s->rtc.alm.tm_mday);
 370     case MENELAUS_RTC_AL_MON:
 371         return to_bcd(s->rtc.alm.tm_mon + 1);
 372     case MENELAUS_RTC_AL_YR:
 373         return to_bcd(s->rtc.alm.tm_year - 2000);
 374     case MENELAUS_RTC_COMP_MSB:
 375         return (s->rtc.comp >> 8) & 0xff;
 376     case MENELAUS_RTC_COMP_LSB:
 377         return (s->rtc.comp >> 0) & 0xff;
 378
 379     case MENELAUS_S1_PULL_EN:
 380         return s->pull[0];
 381     case MENELAUS_S1_PULL_DIR:
 382         return s->pull[1];
 383     case MENELAUS_S2_PULL_EN:
 384         return s->pull[2];
 385     case MENELAUS_S2_PULL_DIR:
 386         return s->pull[3];
 387
 388     case MENELAUS_MCT_CTRL3: reg ++;
 389     case MENELAUS_MCT_CTRL2: reg ++;
 390     case MENELAUS_MCT_CTRL1:
 391         return s->mmc_ctrl[reg];
 392     case MENELAUS_MCT_PIN_ST:
 393         /* TODO: return the real Card Detect */
 394         return 0;
 395     case MENELAUS_DEBOUNCE1:
 396         return s->mmc_debounce;
 397
 398     default:
 399 #ifdef VERBOSE
 400         printf("%s: unknown register %02x\n", __FUNCTION__, addr);
 401 #endif
 402         break;
 403     }
 404     return 0;
 405 }
 406
 407 static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 408 {
 409     MenelausState *s = (MenelausState *) opaque;
 410     int line;
 411     int reg = 0;
 412     struct tm tm;
 413
 414     switch (addr) {
 415     case MENELAUS_VCORE_CTRL1:
 416         s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
 417         break;
 418     case MENELAUS_VCORE_CTRL2:
 419         s->vcore[1] = value;
 420         break;
 421     case MENELAUS_VCORE_CTRL3:
 422         s->vcore[2] = MIN(value & 0x1f, 0x12);
 423         break;
 424     case MENELAUS_VCORE_CTRL4:
 425         s->vcore[3] = MIN(value & 0x1f, 0x12);
 426         break;
 427     case MENELAUS_VCORE_CTRL5:
 428         s->vcore[4] = value & 3;
 429         /* XXX
 430          * auto set to 3 on M_Active, nRESWARM
 431          * auto set to 0 on M_WaitOn, M_Backup
 432          */
 433         break;
 434
 435     case MENELAUS_DCDC_CTRL1:
 436         s->dcdc[0] = value & 0x3f;
 437         break;
 438     case MENELAUS_DCDC_CTRL2:
 439         s->dcdc[1] = value & 0x07;
 440         /* XXX
 441          * auto set to 3 on M_Active, nRESWARM
 442          * auto set to 0 on M_WaitOn, M_Backup
 443          */
 444         break;
 445     case MENELAUS_DCDC_CTRL3:
 446         s->dcdc[2] = value & 0x07;
 447         break;
 448
 449     case MENELAUS_LDO_CTRL1:
 450         s->ldo[0] = value;
 451         break;
 452     case MENELAUS_LDO_CTRL2:
 453         s->ldo[1] = value & 0x7f;
 454         /* XXX
 455          * auto set to 0x7e on M_WaitOn, M_Backup
 456          */
 457         break;
 458     case MENELAUS_LDO_CTRL3:
 459         s->ldo[2] = value & 3;
 460         /* XXX
 461          * auto set to 3 on M_Active, nRESWARM
 462          * auto set to 0 on M_WaitOn, M_Backup
 463          */
 464         break;
 465     case MENELAUS_LDO_CTRL4:
 466         s->ldo[3] = value & 3;
 467         /* XXX
 468          * auto set to 3 on M_Active, nRESWARM
 469          * auto set to 0 on M_WaitOn, M_Backup
 470          */
 471         break;
 472     case MENELAUS_LDO_CTRL5:
 473         s->ldo[4] = value & 3;
 474         /* XXX
 475          * auto set to 3 on M_Active, nRESWARM
 476          * auto set to 0 on M_WaitOn, M_Backup
 477          */
 478         break;
 479     case MENELAUS_LDO_CTRL6:
 480         s->ldo[5] = value & 3;
 481         break;
 482     case MENELAUS_LDO_CTRL7:
 483         s->ldo[6] = value & 3;
 484         break;
 485     case MENELAUS_LDO_CTRL8:
 486         s->ldo[7] = value & 3;
 487         break;
 488
 489     case MENELAUS_SLEEP_CTRL2: reg ++;
 490     case MENELAUS_SLEEP_CTRL1:
 491         s->sleep[reg] = value;
 492         break;
 493
 494     case MENELAUS_DEVICE_OFF:
 495         if (value & 1)
 496             menelaus_reset(&s->i2c);
 497         break;
 498
 499     case MENELAUS_OSC_CTRL:
 500         s->osc = value & 7;
 501         break;
 502
 503     case MENELAUS_DETECT_CTRL:
 504         s->detect = value & 0x7f;
 505         break;
 506
 507     case MENELAUS_INT_MASK1:
 508         s->mask &= 0xf00;
 509         s->mask |= value << 0;
 510         menelaus_update(s);
 511         break;
 512     case MENELAUS_INT_MASK2:
 513         s->mask &= 0x0ff;
 514         s->mask |= value << 8;
 515         menelaus_update(s);
 516         break;
 517
 518     case MENELAUS_INT_ACK1:
 519         s->status &= ~(((uint16_t) value) << 0);
 520         menelaus_update(s);
 521         break;
 522     case MENELAUS_INT_ACK2:
 523         s->status &= ~(((uint16_t) value) << 8);
 524         menelaus_update(s);
 525         break;
 526
 527     case MENELAUS_GPIO_CTRL:
 528         for (line = 0; line < 3; line ++) {
 529             if (((s->dir ^ value) >> line) & 1) {
 530                 qemu_set_irq(s->out[line],
 531                              ((s->outputs & ~s->dir) >> line) & 1);
 532             }
 533         }
 534         s->dir = value & 0x67;
 535         break;
 536     case MENELAUS_GPIO_OUT:
 537         for (line = 0; line < 3; line ++) {
 538             if ((((s->outputs ^ value) & ~s->dir) >> line) & 1) {
 539                 qemu_set_irq(s->out[line], (s->outputs >> line) & 1);
 540             }
 541         }
 542         s->outputs = value & 0x07;
 543         break;
 544
 545     case MENELAUS_BBSMS:
 546         s->bbsms = 0x0d;
 547         break;
 548
 549     case MENELAUS_RTC_CTRL:
 550         if ((s->rtc.ctrl ^ value) & 1) {                        /* RTC_EN */
 551             if (value & 1)
 552                 menelaus_rtc_start(s);
 553             else
 554                 menelaus_rtc_stop(s);
 555         }
 556         s->rtc.ctrl = value & 0x1f;
 557         menelaus_alm_update(s);
 558         break;
 559     case MENELAUS_RTC_UPDATE:
 560         menelaus_rtc_update(s);
 561         memcpy(&tm, &s->rtc.tm, sizeof(tm));
 562         switch (value & 0xf) {
 563         case 0:
 564             break;
 565         case 1:
 566             tm.tm_sec = s->rtc.new.tm_sec;
 567             break;
 568         case 2:
 569             tm.tm_min = s->rtc.new.tm_min;
 570             break;
 571         case 3:
 572             if (s->rtc.new.tm_hour > 23)
 573                 goto rtc_badness;
 574             tm.tm_hour = s->rtc.new.tm_hour;
 575             break;
 576         case 4:
 577             if (s->rtc.new.tm_mday < 1)
 578                 goto rtc_badness;
 579             /* TODO check range */
 580             tm.tm_mday = s->rtc.new.tm_mday;
 581             break;
 582         case 5:
 583             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 584                 goto rtc_badness;
 585             tm.tm_mon = s->rtc.new.tm_mon;
 586             break;
 587         case 6:
 588             tm.tm_year = s->rtc.new.tm_year;
 589             break;
 590         case 7:
 591             /* TODO set .tm_mday instead */
 592             tm.tm_wday = s->rtc.new.tm_wday;
 593             break;
 594         case 8:
 595             if (s->rtc.new.tm_hour > 23)
 596                 goto rtc_badness;
 597             if (s->rtc.new.tm_mday < 1)
 598                 goto rtc_badness;
 599             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 600                 goto rtc_badness;
 601             tm.tm_sec = s->rtc.new.tm_sec;
 602             tm.tm_min = s->rtc.new.tm_min;
 603             tm.tm_hour = s->rtc.new.tm_hour;
 604             tm.tm_mday = s->rtc.new.tm_mday;
 605             tm.tm_mon = s->rtc.new.tm_mon;
 606             tm.tm_year = s->rtc.new.tm_year;
 607             break;
 608         rtc_badness:
 609         default:
 610             fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
 611                             __FUNCTION__, value);
 612             s->status |= 1 << 10;                               /* RTCERR */
 613             menelaus_update(s);
 614         }
 615         s->rtc.sec_offset = qemu_timedate_diff(&tm);
 616         break;
 617     case MENELAUS_RTC_SEC:
 618         s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
 619         break;
 620     case MENELAUS_RTC_MIN:
 621         s->rtc.tm.tm_min = from_bcd(value & 0x7f);
 622         break;
 623     case MENELAUS_RTC_HR:
 624         s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?  /* MODE12_n24 */
 625                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 626                 from_bcd(value & 0x3f);
 627         break;
 628     case MENELAUS_RTC_DAY:
 629         s->rtc.tm.tm_mday = from_bcd(value);
 630         break;
 631     case MENELAUS_RTC_MON:
 632         s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
 633         break;
 634     case MENELAUS_RTC_YR:
 635         s->rtc.tm.tm_year = 2000 + from_bcd(value);
 636         break;
 637     case MENELAUS_RTC_WKDAY:
 638         s->rtc.tm.tm_mday = from_bcd(value);
 639         break;
 640     case MENELAUS_RTC_AL_SEC:
 641         s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
 642         menelaus_alm_update(s);
 643         break;
 644     case MENELAUS_RTC_AL_MIN:
 645         s->rtc.alm.tm_min = from_bcd(value & 0x7f);
 646         menelaus_alm_update(s);
 647         break;
 648     case MENELAUS_RTC_AL_HR:
 649         s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ? /* MODE12_n24 */
 650                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 651                 from_bcd(value & 0x3f);
 652         menelaus_alm_update(s);
 653         break;
 654     case MENELAUS_RTC_AL_DAY:
 655         s->rtc.alm.tm_mday = from_bcd(value);
 656         menelaus_alm_update(s);
 657         break;
 658     case MENELAUS_RTC_AL_MON:
 659         s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
 660         menelaus_alm_update(s);
 661         break;
 662     case MENELAUS_RTC_AL_YR:
 663         s->rtc.alm.tm_year = 2000 + from_bcd(value);
 664         menelaus_alm_update(s);
 665         break;
 666     case MENELAUS_RTC_COMP_MSB:
 667         s->rtc.comp &= 0xff;
 668         s->rtc.comp |= value << 8;
 669         break;
 670     case MENELAUS_RTC_COMP_LSB:
 671         s->rtc.comp &= 0xff << 8;
 672         s->rtc.comp |= value;
 673         break;
 674
 675     case MENELAUS_S1_PULL_EN:
 676         s->pull[0] = value;
 677         break;
 678     case MENELAUS_S1_PULL_DIR:
 679         s->pull[1] = value & 0x1f;
 680         break;
 681     case MENELAUS_S2_PULL_EN:
 682         s->pull[2] = value;
 683         break;
 684     case MENELAUS_S2_PULL_DIR:
 685         s->pull[3] = value & 0x1f;
 686         break;
 687
 688     case MENELAUS_MCT_CTRL1:
 689         s->mmc_ctrl[0] = value & 0x7f;
 690         break;
 691     case MENELAUS_MCT_CTRL2:
 692         s->mmc_ctrl[1] = value;
 693         /* TODO update Card Detect interrupts */
 694         break;
 695     case MENELAUS_MCT_CTRL3:
 696         s->mmc_ctrl[2] = value & 0xf;
 697         break;
 698     case MENELAUS_DEBOUNCE1:
 699         s->mmc_debounce = value & 0x3f;
 700         break;
 701
 702     default:
 703 #ifdef VERBOSE
 704         printf("%s: unknown register %02x\n", __FUNCTION__, addr);
 705 #endif
 706     }
 707 }
 708
 709 static void menelaus_event(I2CSlave *i2c, enum i2c_event event)
 710 {
 711     MenelausState *s = (MenelausState *) i2c;
 712
 713     if (event == I2C_START_SEND)
 714         s->firstbyte = 1;
 715 }
 716
 717 static int menelaus_tx(I2CSlave *i2c, uint8_t data)
 718 {
 719     MenelausState *s = (MenelausState *) i2c;
 720     /* Interpret register address byte */
 721     if (s->firstbyte) {
 722         s->reg = data;
 723         s->firstbyte = 0;
 724     } else
 725         menelaus_write(s, s->reg ++, data);
 726
 727     return 0;
 728 }
 729
 730 static int menelaus_rx(I2CSlave *i2c)
 731 {
 732     MenelausState *s = (MenelausState *) i2c;
 733
 734     return menelaus_read(s, s->reg ++);
 735 }
 736
 737 /* Save restore 32 bit int as uint16_t
 738    This is a Big hack, but it is how the old state did it.
 739    Or we broke compatibility in the state, or we can't use struct tm
 740  */
 741
 742 static int get_int32_as_uint16(QEMUFile *f, void *pv, size_t size)
 743 {
 744     int *v = pv;
 745     *v = qemu_get_be16(f);
 746     return 0;
 747 }
 748
 749 static void put_int32_as_uint16(QEMUFile *f, void *pv, size_t size)
 750 {
 751     int *v = pv;
 752     qemu_put_be16(f, *v);
 753 }
 754
 755 static const VMStateInfo vmstate_hack_int32_as_uint16 = {
 756     .name = "int32_as_uint16",
 757     .get  = get_int32_as_uint16,
 758     .put  = put_int32_as_uint16,
 759 };
 760
 761 #define VMSTATE_UINT16_HACK(_f, _s)                                  \
 762     VMSTATE_SINGLE(_f, _s, 0, vmstate_hack_int32_as_uint16, int32_t)
 763
 764
 765 static const VMStateDescription vmstate_menelaus_tm = {
 766     .name = "menelaus_tm",
 767     .version_id = 0,
 768     .minimum_version_id = 0,
 769     .minimum_version_id_old = 0,
 770     .fields      = (VMStateField []) {
 771         VMSTATE_UINT16_HACK(tm_sec, struct tm),
 772         VMSTATE_UINT16_HACK(tm_min, struct tm),
 773         VMSTATE_UINT16_HACK(tm_hour, struct tm),
 774         VMSTATE_UINT16_HACK(tm_mday, struct tm),
 775         VMSTATE_UINT16_HACK(tm_min, struct tm),
 776         VMSTATE_UINT16_HACK(tm_year, struct tm),
 777         VMSTATE_END_OF_LIST()
 778     }
 779 };
 780
 781 static void menelaus_pre_save(void *opaque)
 782 {
 783     MenelausState *s = opaque;
 784     /* Should be <= 1000 */
 785     s->rtc_next_vmstate =  s->rtc.next - qemu_get_clock_ms(rtc_clock);
 786 }
 787
 788 static int menelaus_post_load(void *opaque, int version_id)
 789 {
 790     MenelausState *s = opaque;
 791
 792     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 793         menelaus_rtc_stop(s);
 794
 795     s->rtc.next = s->rtc_next_vmstate;
 796
 797     menelaus_alm_update(s);
 798     menelaus_update(s);
 799     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 800         menelaus_rtc_start(s);
 801     return 0;
 802 }
 803
 804 static const VMStateDescription vmstate_menelaus = {
 805     .name = "menelaus",
 806     .version_id = 0,
 807     .minimum_version_id = 0,
 808     .minimum_version_id_old = 0,
 809     .pre_save = menelaus_pre_save,
 810     .post_load = menelaus_post_load,
 811     .fields      = (VMStateField []) {
 812         VMSTATE_INT32(firstbyte, MenelausState),
 813         VMSTATE_UINT8(reg, MenelausState),
 814         VMSTATE_UINT8_ARRAY(vcore, MenelausState, 5),
 815         VMSTATE_UINT8_ARRAY(dcdc, MenelausState, 3),
 816         VMSTATE_UINT8_ARRAY(ldo, MenelausState, 8),
 817         VMSTATE_UINT8_ARRAY(sleep, MenelausState, 2),
 818         VMSTATE_UINT8(osc, MenelausState),
 819         VMSTATE_UINT8(detect, MenelausState),
 820         VMSTATE_UINT16(mask, MenelausState),
 821         VMSTATE_UINT16(status, MenelausState),
 822         VMSTATE_UINT8(dir, MenelausState),
 823         VMSTATE_UINT8(inputs, MenelausState),
 824         VMSTATE_UINT8(outputs, MenelausState),
 825         VMSTATE_UINT8(bbsms, MenelausState),
 826         VMSTATE_UINT8_ARRAY(pull, MenelausState, 4),
 827         VMSTATE_UINT8_ARRAY(mmc_ctrl, MenelausState, 3),
 828         VMSTATE_UINT8(mmc_debounce, MenelausState),
 829         VMSTATE_UINT8(rtc.ctrl, MenelausState),
 830         VMSTATE_UINT16(rtc.comp, MenelausState),
 831         VMSTATE_UINT16(rtc_next_vmstate, MenelausState),
 832         VMSTATE_STRUCT(rtc.new, MenelausState, 0, vmstate_menelaus_tm,
 833                        struct tm),
 834         VMSTATE_STRUCT(rtc.alm, MenelausState, 0, vmstate_menelaus_tm,
 835                        struct tm),
 836         VMSTATE_UINT8(pwrbtn_state, MenelausState),
 837         VMSTATE_I2C_SLAVE(i2c, MenelausState),
 838         VMSTATE_END_OF_LIST()
 839     }
 840 };
 841
 842 static int twl92230_init(I2CSlave *i2c)
 843 {
 844     MenelausState *s = FROM_I2C_SLAVE(MenelausState, i2c);
 845
 846     s->rtc.hz_tm = qemu_new_timer_ms(rtc_clock, menelaus_rtc_hz, s);
 847     /* Three output pins plus one interrupt pin.  */
 848     qdev_init_gpio_out(&i2c->qdev, s->out, 4);
 849
 850     /* Three input pins plus one power-button pin.  */
 851     qdev_init_gpio_in(&i2c->qdev, menelaus_gpio_set, 4);
 852
 853     menelaus_reset(&s->i2c);
 854
 855     return 0;
 856 }
 857
 858 static void twl92230_class_init(ObjectClass *klass, void *data)
 859 {
 860     DeviceClass *dc = DEVICE_CLASS(klass);
 861     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 862
 863     sc->init = twl92230_init;
 864     sc->event = menelaus_event;
 865     sc->recv = menelaus_rx;
 866     sc->send = menelaus_tx;
 867     dc->vmsd = &vmstate_menelaus;
 868 }
 869
 870 static const TypeInfo twl92230_info = {
 871     .name          = "twl92230",
 872     .parent        = TYPE_I2C_SLAVE,
 873     .instance_size = sizeof(MenelausState),
 874     .class_init    = twl92230_class_init,
 875 };
 876
 877 static void twl92230_register_types(void)
 878 {
 879     type_register_static(&twl92230_info);
 880 }
 881
 882 type_init(twl92230_register_types)