hw/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.h"
  23 #include "qemu-timer.h"
  24 #include "i2c.h"
  25 #include "sysemu.h"
  26 #include "console.h"
  27
  28 #define VERBOSE 1
  29
  30 typedef struct {
  31     i2c_slave 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     qemu_irq *in;
  66     uint8_t pwrbtn_state;
  67     qemu_irq pwrbtn;
  68 } MenelausState;
  69
  70 static inline void menelaus_update(MenelausState *s)
  71 {
  72     qemu_set_irq(s->out[3], s->status & ~s->mask);
  73 }
  74
  75 static inline void menelaus_rtc_start(MenelausState *s)
  76 {
  77     s->rtc.next += qemu_get_clock_ms(rt_clock);
  78     qemu_mod_timer(s->rtc.hz_tm, s->rtc.next);
  79 }
  80
  81 static inline void menelaus_rtc_stop(MenelausState *s)
  82 {
  83     qemu_del_timer(s->rtc.hz_tm);
  84     s->rtc.next -= qemu_get_clock_ms(rt_clock);
  85     if (s->rtc.next < 1)
  86         s->rtc.next = 1;
  87 }
  88
  89 static void menelaus_rtc_update(MenelausState *s)
  90 {
  91     qemu_get_timedate(&s->rtc.tm, s->rtc.sec_offset);
  92 }
  93
  94 static void menelaus_alm_update(MenelausState *s)
  95 {
  96     if ((s->rtc.ctrl & 3) == 3)
  97         s->rtc.alm_sec = qemu_timedate_diff(&s->rtc.alm) - s->rtc.sec_offset;
  98 }
  99
 100 static void menelaus_rtc_hz(void *opaque)
 101 {
 102     MenelausState *s = (MenelausState *) opaque;
 103
 104     s->rtc.next_comp --;
 105     s->rtc.alm_sec --;
 106     s->rtc.next += 1000;
 107     qemu_mod_timer(s->rtc.hz_tm, s->rtc.next);
 108     if ((s->rtc.ctrl >> 3) & 3) {                               /* EVERY */
 109         menelaus_rtc_update(s);
 110         if (((s->rtc.ctrl >> 3) & 3) == 1 && !s->rtc.tm.tm_sec)
 111             s->status |= 1 << 8;                                /* RTCTMR */
 112         else if (((s->rtc.ctrl >> 3) & 3) == 2 && !s->rtc.tm.tm_min)
 113             s->status |= 1 << 8;                                /* RTCTMR */
 114         else if (!s->rtc.tm.tm_hour)
 115             s->status |= 1 << 8;                                /* RTCTMR */
 116     } else
 117         s->status |= 1 << 8;                                    /* RTCTMR */
 118     if ((s->rtc.ctrl >> 1) & 1) {                               /* RTC_AL_EN */
 119         if (s->rtc.alm_sec == 0)
 120             s->status |= 1 << 9;                                /* RTCALM */
 121         /* TODO: wake-up */
 122     }
 123     if (s->rtc.next_comp <= 0) {
 124         s->rtc.next -= muldiv64((int16_t) s->rtc.comp, 1000, 0x8000);
 125         s->rtc.next_comp = 3600;
 126     }
 127     menelaus_update(s);
 128 }
 129
 130 static void menelaus_reset(i2c_slave *i2c)
 131 {
 132     MenelausState *s = (MenelausState *) i2c;
 133     s->reg = 0x00;
 134
 135     s->vcore[0] = 0x0c; /* XXX: X-loader needs 0x8c? check!  */
 136     s->vcore[1] = 0x05;
 137     s->vcore[2] = 0x02;
 138     s->vcore[3] = 0x0c;
 139     s->vcore[4] = 0x03;
 140     s->dcdc[0] = 0x33;  /* Depends on wiring */
 141     s->dcdc[1] = 0x03;
 142     s->dcdc[2] = 0x00;
 143     s->ldo[0] = 0x95;
 144     s->ldo[1] = 0x7e;
 145     s->ldo[2] = 0x00;
 146     s->ldo[3] = 0x00;   /* Depends on wiring */
 147     s->ldo[4] = 0x03;   /* Depends on wiring */
 148     s->ldo[5] = 0x00;
 149     s->ldo[6] = 0x00;
 150     s->ldo[7] = 0x00;
 151     s->sleep[0] = 0x00;
 152     s->sleep[1] = 0x00;
 153     s->osc = 0x01;
 154     s->detect = 0x09;
 155     s->mask = 0x0fff;
 156     s->status = 0;
 157     s->dir = 0x07;
 158     s->outputs = 0x00;
 159     s->bbsms = 0x00;
 160     s->pull[0] = 0x00;
 161     s->pull[1] = 0x00;
 162     s->pull[2] = 0x00;
 163     s->pull[3] = 0x00;
 164     s->mmc_ctrl[0] = 0x03;
 165     s->mmc_ctrl[1] = 0xc0;
 166     s->mmc_ctrl[2] = 0x00;
 167     s->mmc_debounce = 0x05;
 168
 169     if (s->rtc.ctrl & 1)
 170         menelaus_rtc_stop(s);
 171     s->rtc.ctrl = 0x00;
 172     s->rtc.comp = 0x0000;
 173     s->rtc.next = 1000;
 174     s->rtc.sec_offset = 0;
 175     s->rtc.next_comp = 1800;
 176     s->rtc.alm_sec = 1800;
 177     s->rtc.alm.tm_sec = 0x00;
 178     s->rtc.alm.tm_min = 0x00;
 179     s->rtc.alm.tm_hour = 0x00;
 180     s->rtc.alm.tm_mday = 0x01;
 181     s->rtc.alm.tm_mon = 0x00;
 182     s->rtc.alm.tm_year = 2004;
 183     menelaus_update(s);
 184 }
 185
 186 static void menelaus_gpio_set(void *opaque, int line, int level)
 187 {
 188     MenelausState *s = (MenelausState *) opaque;
 189
 190     /* No interrupt generated */
 191     s->inputs &= ~(1 << line);
 192     s->inputs |= level << line;
 193 }
 194
 195 static void menelaus_pwrbtn_set(void *opaque, int line, int level)
 196 {
 197     MenelausState *s = (MenelausState *) opaque;
 198
 199     if (!s->pwrbtn_state && level) {
 200         s->status |= 1 << 11;                                   /* PSHBTN */
 201         menelaus_update(s);
 202     }
 203     s->pwrbtn_state = level;
 204 }
 205
 206 #define MENELAUS_REV            0x01
 207 #define MENELAUS_VCORE_CTRL1    0x02
 208 #define MENELAUS_VCORE_CTRL2    0x03
 209 #define MENELAUS_VCORE_CTRL3    0x04
 210 #define MENELAUS_VCORE_CTRL4    0x05
 211 #define MENELAUS_VCORE_CTRL5    0x06
 212 #define MENELAUS_DCDC_CTRL1     0x07
 213 #define MENELAUS_DCDC_CTRL2     0x08
 214 #define MENELAUS_DCDC_CTRL3     0x09
 215 #define MENELAUS_LDO_CTRL1      0x0a
 216 #define MENELAUS_LDO_CTRL2      0x0b
 217 #define MENELAUS_LDO_CTRL3      0x0c
 218 #define MENELAUS_LDO_CTRL4      0x0d
 219 #define MENELAUS_LDO_CTRL5      0x0e
 220 #define MENELAUS_LDO_CTRL6      0x0f
 221 #define MENELAUS_LDO_CTRL7      0x10
 222 #define MENELAUS_LDO_CTRL8      0x11
 223 #define MENELAUS_SLEEP_CTRL1    0x12
 224 #define MENELAUS_SLEEP_CTRL2    0x13
 225 #define MENELAUS_DEVICE_OFF     0x14
 226 #define MENELAUS_OSC_CTRL       0x15
 227 #define MENELAUS_DETECT_CTRL    0x16
 228 #define MENELAUS_INT_MASK1      0x17
 229 #define MENELAUS_INT_MASK2      0x18
 230 #define MENELAUS_INT_STATUS1    0x19
 231 #define MENELAUS_INT_STATUS2    0x1a
 232 #define MENELAUS_INT_ACK1       0x1b
 233 #define MENELAUS_INT_ACK2       0x1c
 234 #define MENELAUS_GPIO_CTRL      0x1d
 235 #define MENELAUS_GPIO_IN        0x1e
 236 #define MENELAUS_GPIO_OUT       0x1f
 237 #define MENELAUS_BBSMS          0x20
 238 #define MENELAUS_RTC_CTRL       0x21
 239 #define MENELAUS_RTC_UPDATE     0x22
 240 #define MENELAUS_RTC_SEC        0x23
 241 #define MENELAUS_RTC_MIN        0x24
 242 #define MENELAUS_RTC_HR         0x25
 243 #define MENELAUS_RTC_DAY        0x26
 244 #define MENELAUS_RTC_MON        0x27
 245 #define MENELAUS_RTC_YR         0x28
 246 #define MENELAUS_RTC_WKDAY      0x29
 247 #define MENELAUS_RTC_AL_SEC     0x2a
 248 #define MENELAUS_RTC_AL_MIN     0x2b
 249 #define MENELAUS_RTC_AL_HR      0x2c
 250 #define MENELAUS_RTC_AL_DAY     0x2d
 251 #define MENELAUS_RTC_AL_MON     0x2e
 252 #define MENELAUS_RTC_AL_YR      0x2f
 253 #define MENELAUS_RTC_COMP_MSB   0x30
 254 #define MENELAUS_RTC_COMP_LSB   0x31
 255 #define MENELAUS_S1_PULL_EN     0x32
 256 #define MENELAUS_S1_PULL_DIR    0x33
 257 #define MENELAUS_S2_PULL_EN     0x34
 258 #define MENELAUS_S2_PULL_DIR    0x35
 259 #define MENELAUS_MCT_CTRL1      0x36
 260 #define MENELAUS_MCT_CTRL2      0x37
 261 #define MENELAUS_MCT_CTRL3      0x38
 262 #define MENELAUS_MCT_PIN_ST     0x39
 263 #define MENELAUS_DEBOUNCE1      0x3a
 264
 265 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 266 {
 267     MenelausState *s = (MenelausState *) opaque;
 268     int reg = 0;
 269
 270     switch (addr) {
 271     case MENELAUS_REV:
 272         return 0x22;
 273
 274     case MENELAUS_VCORE_CTRL5: reg ++;
 275     case MENELAUS_VCORE_CTRL4: reg ++;
 276     case MENELAUS_VCORE_CTRL3: reg ++;
 277     case MENELAUS_VCORE_CTRL2: reg ++;
 278     case MENELAUS_VCORE_CTRL1:
 279         return s->vcore[reg];
 280
 281     case MENELAUS_DCDC_CTRL3: reg ++;
 282     case MENELAUS_DCDC_CTRL2: reg ++;
 283     case MENELAUS_DCDC_CTRL1:
 284         return s->dcdc[reg];
 285
 286     case MENELAUS_LDO_CTRL8: reg ++;
 287     case MENELAUS_LDO_CTRL7: reg ++;
 288     case MENELAUS_LDO_CTRL6: reg ++;
 289     case MENELAUS_LDO_CTRL5: reg ++;
 290     case MENELAUS_LDO_CTRL4: reg ++;
 291     case MENELAUS_LDO_CTRL3: reg ++;
 292     case MENELAUS_LDO_CTRL2: reg ++;
 293     case MENELAUS_LDO_CTRL1:
 294         return s->ldo[reg];
 295
 296     case MENELAUS_SLEEP_CTRL2: reg ++;
 297     case MENELAUS_SLEEP_CTRL1:
 298         return s->sleep[reg];
 299
 300     case MENELAUS_DEVICE_OFF:
 301         return 0;
 302
 303     case MENELAUS_OSC_CTRL:
 304         return s->osc | (1 << 7);                       /* CLK32K_GOOD */
 305
 306     case MENELAUS_DETECT_CTRL:
 307         return s->detect;
 308
 309     case MENELAUS_INT_MASK1:
 310         return (s->mask >> 0) & 0xff;
 311     case MENELAUS_INT_MASK2:
 312         return (s->mask >> 8) & 0xff;
 313
 314     case MENELAUS_INT_STATUS1:
 315         return (s->status >> 0) & 0xff;
 316     case MENELAUS_INT_STATUS2:
 317         return (s->status >> 8) & 0xff;
 318
 319     case MENELAUS_INT_ACK1:
 320     case MENELAUS_INT_ACK2:
 321         return 0;
 322
 323     case MENELAUS_GPIO_CTRL:
 324         return s->dir;
 325     case MENELAUS_GPIO_IN:
 326         return s->inputs | (~s->dir & s->outputs);
 327     case MENELAUS_GPIO_OUT:
 328         return s->outputs;
 329
 330     case MENELAUS_BBSMS:
 331         return s->bbsms;
 332
 333     case MENELAUS_RTC_CTRL:
 334         return s->rtc.ctrl;
 335     case MENELAUS_RTC_UPDATE:
 336         return 0x00;
 337     case MENELAUS_RTC_SEC:
 338         menelaus_rtc_update(s);
 339         return to_bcd(s->rtc.tm.tm_sec);
 340     case MENELAUS_RTC_MIN:
 341         menelaus_rtc_update(s);
 342         return to_bcd(s->rtc.tm.tm_min);
 343     case MENELAUS_RTC_HR:
 344         menelaus_rtc_update(s);
 345         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 346             return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
 347                     (!!(s->rtc.tm.tm_hour >= 12) << 7); /* PM_nAM */
 348         else
 349             return to_bcd(s->rtc.tm.tm_hour);
 350     case MENELAUS_RTC_DAY:
 351         menelaus_rtc_update(s);
 352         return to_bcd(s->rtc.tm.tm_mday);
 353     case MENELAUS_RTC_MON:
 354         menelaus_rtc_update(s);
 355         return to_bcd(s->rtc.tm.tm_mon + 1);
 356     case MENELAUS_RTC_YR:
 357         menelaus_rtc_update(s);
 358         return to_bcd(s->rtc.tm.tm_year - 2000);
 359     case MENELAUS_RTC_WKDAY:
 360         menelaus_rtc_update(s);
 361         return to_bcd(s->rtc.tm.tm_wday);
 362     case MENELAUS_RTC_AL_SEC:
 363         return to_bcd(s->rtc.alm.tm_sec);
 364     case MENELAUS_RTC_AL_MIN:
 365         return to_bcd(s->rtc.alm.tm_min);
 366     case MENELAUS_RTC_AL_HR:
 367         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 368             return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
 369                     (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
 370         else
 371             return to_bcd(s->rtc.alm.tm_hour);
 372     case MENELAUS_RTC_AL_DAY:
 373         return to_bcd(s->rtc.alm.tm_mday);
 374     case MENELAUS_RTC_AL_MON:
 375         return to_bcd(s->rtc.alm.tm_mon + 1);
 376     case MENELAUS_RTC_AL_YR:
 377         return to_bcd(s->rtc.alm.tm_year - 2000);
 378     case MENELAUS_RTC_COMP_MSB:
 379         return (s->rtc.comp >> 8) & 0xff;
 380     case MENELAUS_RTC_COMP_LSB:
 381         return (s->rtc.comp >> 0) & 0xff;
 382
 383     case MENELAUS_S1_PULL_EN:
 384         return s->pull[0];
 385     case MENELAUS_S1_PULL_DIR:
 386         return s->pull[1];
 387     case MENELAUS_S2_PULL_EN:
 388         return s->pull[2];
 389     case MENELAUS_S2_PULL_DIR:
 390         return s->pull[3];
 391
 392     case MENELAUS_MCT_CTRL3: reg ++;
 393     case MENELAUS_MCT_CTRL2: reg ++;
 394     case MENELAUS_MCT_CTRL1:
 395         return s->mmc_ctrl[reg];
 396     case MENELAUS_MCT_PIN_ST:
 397         /* TODO: return the real Card Detect */
 398         return 0;
 399     case MENELAUS_DEBOUNCE1:
 400         return s->mmc_debounce;
 401
 402     default:
 403 #ifdef VERBOSE
 404         printf("%s: unknown register %02x\n", __FUNCTION__, addr);
 405 #endif
 406         break;
 407     }
 408     return 0;
 409 }
 410
 411 static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 412 {
 413     MenelausState *s = (MenelausState *) opaque;
 414     int line;
 415     int reg = 0;
 416     struct tm tm;
 417
 418     switch (addr) {
 419     case MENELAUS_VCORE_CTRL1:
 420         s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
 421         break;
 422     case MENELAUS_VCORE_CTRL2:
 423         s->vcore[1] = value;
 424         break;
 425     case MENELAUS_VCORE_CTRL3:
 426         s->vcore[2] = MIN(value & 0x1f, 0x12);
 427         break;
 428     case MENELAUS_VCORE_CTRL4:
 429         s->vcore[3] = MIN(value & 0x1f, 0x12);
 430         break;
 431     case MENELAUS_VCORE_CTRL5:
 432         s->vcore[4] = value & 3;
 433         /* XXX
 434          * auto set to 3 on M_Active, nRESWARM
 435          * auto set to 0 on M_WaitOn, M_Backup
 436          */
 437         break;
 438
 439     case MENELAUS_DCDC_CTRL1:
 440         s->dcdc[0] = value & 0x3f;
 441         break;
 442     case MENELAUS_DCDC_CTRL2:
 443         s->dcdc[1] = value & 0x07;
 444         /* XXX
 445          * auto set to 3 on M_Active, nRESWARM
 446          * auto set to 0 on M_WaitOn, M_Backup
 447          */
 448         break;
 449     case MENELAUS_DCDC_CTRL3:
 450         s->dcdc[2] = value & 0x07;
 451         break;
 452
 453     case MENELAUS_LDO_CTRL1:
 454         s->ldo[0] = value;
 455         break;
 456     case MENELAUS_LDO_CTRL2:
 457         s->ldo[1] = value & 0x7f;
 458         /* XXX
 459          * auto set to 0x7e on M_WaitOn, M_Backup
 460          */
 461         break;
 462     case MENELAUS_LDO_CTRL3:
 463         s->ldo[2] = value & 3;
 464         /* XXX
 465          * auto set to 3 on M_Active, nRESWARM
 466          * auto set to 0 on M_WaitOn, M_Backup
 467          */
 468         break;
 469     case MENELAUS_LDO_CTRL4:
 470         s->ldo[3] = value & 3;
 471         /* XXX
 472          * auto set to 3 on M_Active, nRESWARM
 473          * auto set to 0 on M_WaitOn, M_Backup
 474          */
 475         break;
 476     case MENELAUS_LDO_CTRL5:
 477         s->ldo[4] = value & 3;
 478         /* XXX
 479          * auto set to 3 on M_Active, nRESWARM
 480          * auto set to 0 on M_WaitOn, M_Backup
 481          */
 482         break;
 483     case MENELAUS_LDO_CTRL6:
 484         s->ldo[5] = value & 3;
 485         break;
 486     case MENELAUS_LDO_CTRL7:
 487         s->ldo[6] = value & 3;
 488         break;
 489     case MENELAUS_LDO_CTRL8:
 490         s->ldo[7] = value & 3;
 491         break;
 492
 493     case MENELAUS_SLEEP_CTRL2: reg ++;
 494     case MENELAUS_SLEEP_CTRL1:
 495         s->sleep[reg] = value;
 496         break;
 497
 498     case MENELAUS_DEVICE_OFF:
 499         if (value & 1)
 500             menelaus_reset(&s->i2c);
 501         break;
 502
 503     case MENELAUS_OSC_CTRL:
 504         s->osc = value & 7;
 505         break;
 506
 507     case MENELAUS_DETECT_CTRL:
 508         s->detect = value & 0x7f;
 509         break;
 510
 511     case MENELAUS_INT_MASK1:
 512         s->mask &= 0xf00;
 513         s->mask |= value << 0;
 514         menelaus_update(s);
 515         break;
 516     case MENELAUS_INT_MASK2:
 517         s->mask &= 0x0ff;
 518         s->mask |= value << 8;
 519         menelaus_update(s);
 520         break;
 521
 522     case MENELAUS_INT_ACK1:
 523         s->status &= ~(((uint16_t) value) << 0);
 524         menelaus_update(s);
 525         break;
 526     case MENELAUS_INT_ACK2:
 527         s->status &= ~(((uint16_t) value) << 8);
 528         menelaus_update(s);
 529         break;
 530
 531     case MENELAUS_GPIO_CTRL:
 532         for (line = 0; line < 3; line ++) {
 533             if (((s->dir ^ value) >> line) & 1) {
 534                 qemu_set_irq(s->out[line],
 535                              ((s->outputs & ~s->dir) >> line) & 1);
 536             }
 537         }
 538         s->dir = value & 0x67;
 539         break;
 540     case MENELAUS_GPIO_OUT:
 541         for (line = 0; line < 3; line ++) {
 542             if ((((s->outputs ^ value) & ~s->dir) >> line) & 1) {
 543                 qemu_set_irq(s->out[line], (s->outputs >> line) & 1);
 544             }
 545         }
 546         s->outputs = value & 0x07;
 547         break;
 548
 549     case MENELAUS_BBSMS:
 550         s->bbsms = 0x0d;
 551         break;
 552
 553     case MENELAUS_RTC_CTRL:
 554         if ((s->rtc.ctrl ^ value) & 1) {                        /* RTC_EN */
 555             if (value & 1)
 556                 menelaus_rtc_start(s);
 557             else
 558                 menelaus_rtc_stop(s);
 559         }
 560         s->rtc.ctrl = value & 0x1f;
 561         menelaus_alm_update(s);
 562         break;
 563     case MENELAUS_RTC_UPDATE:
 564         menelaus_rtc_update(s);
 565         memcpy(&tm, &s->rtc.tm, sizeof(tm));
 566         switch (value & 0xf) {
 567         case 0:
 568             break;
 569         case 1:
 570             tm.tm_sec = s->rtc.new.tm_sec;
 571             break;
 572         case 2:
 573             tm.tm_min = s->rtc.new.tm_min;
 574             break;
 575         case 3:
 576             if (s->rtc.new.tm_hour > 23)
 577                 goto rtc_badness;
 578             tm.tm_hour = s->rtc.new.tm_hour;
 579             break;
 580         case 4:
 581             if (s->rtc.new.tm_mday < 1)
 582                 goto rtc_badness;
 583             /* TODO check range */
 584             tm.tm_mday = s->rtc.new.tm_mday;
 585             break;
 586         case 5:
 587             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 588                 goto rtc_badness;
 589             tm.tm_mon = s->rtc.new.tm_mon;
 590             break;
 591         case 6:
 592             tm.tm_year = s->rtc.new.tm_year;
 593             break;
 594         case 7:
 595             /* TODO set .tm_mday instead */
 596             tm.tm_wday = s->rtc.new.tm_wday;
 597             break;
 598         case 8:
 599             if (s->rtc.new.tm_hour > 23)
 600                 goto rtc_badness;
 601             if (s->rtc.new.tm_mday < 1)
 602                 goto rtc_badness;
 603             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 604                 goto rtc_badness;
 605             tm.tm_sec = s->rtc.new.tm_sec;
 606             tm.tm_min = s->rtc.new.tm_min;
 607             tm.tm_hour = s->rtc.new.tm_hour;
 608             tm.tm_mday = s->rtc.new.tm_mday;
 609             tm.tm_mon = s->rtc.new.tm_mon;
 610             tm.tm_year = s->rtc.new.tm_year;
 611             break;
 612         rtc_badness:
 613         default:
 614             fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
 615                             __FUNCTION__, value);
 616             s->status |= 1 << 10;                               /* RTCERR */
 617             menelaus_update(s);
 618         }
 619         s->rtc.sec_offset = qemu_timedate_diff(&tm);
 620         break;
 621     case MENELAUS_RTC_SEC:
 622         s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
 623         break;
 624     case MENELAUS_RTC_MIN:
 625         s->rtc.tm.tm_min = from_bcd(value & 0x7f);
 626         break;
 627     case MENELAUS_RTC_HR:
 628         s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?  /* MODE12_n24 */
 629                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 630                 from_bcd(value & 0x3f);
 631         break;
 632     case MENELAUS_RTC_DAY:
 633         s->rtc.tm.tm_mday = from_bcd(value);
 634         break;
 635     case MENELAUS_RTC_MON:
 636         s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
 637         break;
 638     case MENELAUS_RTC_YR:
 639         s->rtc.tm.tm_year = 2000 + from_bcd(value);
 640         break;
 641     case MENELAUS_RTC_WKDAY:
 642         s->rtc.tm.tm_mday = from_bcd(value);
 643         break;
 644     case MENELAUS_RTC_AL_SEC:
 645         s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
 646         menelaus_alm_update(s);
 647         break;
 648     case MENELAUS_RTC_AL_MIN:
 649         s->rtc.alm.tm_min = from_bcd(value & 0x7f);
 650         menelaus_alm_update(s);
 651         break;
 652     case MENELAUS_RTC_AL_HR:
 653         s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ? /* MODE12_n24 */
 654                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 655                 from_bcd(value & 0x3f);
 656         menelaus_alm_update(s);
 657         break;
 658     case MENELAUS_RTC_AL_DAY:
 659         s->rtc.alm.tm_mday = from_bcd(value);
 660         menelaus_alm_update(s);
 661         break;
 662     case MENELAUS_RTC_AL_MON:
 663         s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
 664         menelaus_alm_update(s);
 665         break;
 666     case MENELAUS_RTC_AL_YR:
 667         s->rtc.alm.tm_year = 2000 + from_bcd(value);
 668         menelaus_alm_update(s);
 669         break;
 670     case MENELAUS_RTC_COMP_MSB:
 671         s->rtc.comp &= 0xff;
 672         s->rtc.comp |= value << 8;
 673         break;
 674     case MENELAUS_RTC_COMP_LSB:
 675         s->rtc.comp &= 0xff << 8;
 676         s->rtc.comp |= value;
 677         break;
 678
 679     case MENELAUS_S1_PULL_EN:
 680         s->pull[0] = value;
 681         break;
 682     case MENELAUS_S1_PULL_DIR:
 683         s->pull[1] = value & 0x1f;
 684         break;
 685     case MENELAUS_S2_PULL_EN:
 686         s->pull[2] = value;
 687         break;
 688     case MENELAUS_S2_PULL_DIR:
 689         s->pull[3] = value & 0x1f;
 690         break;
 691
 692     case MENELAUS_MCT_CTRL1:
 693         s->mmc_ctrl[0] = value & 0x7f;
 694         break;
 695     case MENELAUS_MCT_CTRL2:
 696         s->mmc_ctrl[1] = value;
 697         /* TODO update Card Detect interrupts */
 698         break;
 699     case MENELAUS_MCT_CTRL3:
 700         s->mmc_ctrl[2] = value & 0xf;
 701         break;
 702     case MENELAUS_DEBOUNCE1:
 703         s->mmc_debounce = value & 0x3f;
 704         break;
 705
 706     default:
 707 #ifdef VERBOSE
 708         printf("%s: unknown register %02x\n", __FUNCTION__, addr);
 709 #endif
 710     }
 711 }
 712
 713 static void menelaus_event(i2c_slave *i2c, enum i2c_event event)
 714 {
 715     MenelausState *s = (MenelausState *) i2c;
 716
 717     if (event == I2C_START_SEND)
 718         s->firstbyte = 1;
 719 }
 720
 721 static int menelaus_tx(i2c_slave *i2c, uint8_t data)
 722 {
 723     MenelausState *s = (MenelausState *) i2c;
 724     /* Interpret register address byte */
 725     if (s->firstbyte) {
 726         s->reg = data;
 727         s->firstbyte = 0;
 728     } else
 729         menelaus_write(s, s->reg ++, data);
 730
 731     return 0;
 732 }
 733
 734 static int menelaus_rx(i2c_slave *i2c)
 735 {
 736     MenelausState *s = (MenelausState *) i2c;
 737
 738     return menelaus_read(s, s->reg ++);
 739 }
 740
 741 /* Save restore 32 bit int as uint16_t
 742    This is a Big hack, but it is how the old state did it.
 743    Or we broke compatibility in the state, or we can't use struct tm
 744  */
 745
 746 static int get_int32_as_uint16(QEMUFile *f, void *pv, size_t size)
 747 {
 748     int *v = pv;
 749     *v = qemu_get_be16(f);
 750     return 0;
 751 }
 752
 753 static void put_int32_as_uint16(QEMUFile *f, void *pv, size_t size)
 754 {
 755     int *v = pv;
 756     qemu_put_be16(f, *v);
 757 }
 758
 759 static const VMStateInfo vmstate_hack_int32_as_uint16 = {
 760     .name = "int32_as_uint16",
 761     .get  = get_int32_as_uint16,
 762     .put  = put_int32_as_uint16,
 763 };
 764
 765 #define VMSTATE_UINT16_HACK(_f, _s)                                  \
 766     VMSTATE_SINGLE(_f, _s, 0, vmstate_hack_int32_as_uint16, int32_t)
 767
 768
 769 static const VMStateDescription vmstate_menelaus_tm = {
 770     .name = "menelaus_tm",
 771     .version_id = 0,
 772     .minimum_version_id = 0,
 773     .minimum_version_id_old = 0,
 774     .fields      = (VMStateField []) {
 775         VMSTATE_UINT16_HACK(tm_sec, struct tm),
 776         VMSTATE_UINT16_HACK(tm_min, struct tm),
 777         VMSTATE_UINT16_HACK(tm_hour, struct tm),
 778         VMSTATE_UINT16_HACK(tm_mday, struct tm),
 779         VMSTATE_UINT16_HACK(tm_min, struct tm),
 780         VMSTATE_UINT16_HACK(tm_year, struct tm),
 781         VMSTATE_END_OF_LIST()
 782     }
 783 };
 784
 785 static void menelaus_pre_save(void *opaque)
 786 {
 787     MenelausState *s = opaque;
 788     /* Should be <= 1000 */
 789     s->rtc_next_vmstate =  s->rtc.next - qemu_get_clock_ms(rt_clock);
 790 }
 791
 792 static int menelaus_post_load(void *opaque, int version_id)
 793 {
 794     MenelausState *s = opaque;
 795
 796     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 797         menelaus_rtc_stop(s);
 798
 799     s->rtc.next = s->rtc_next_vmstate;
 800
 801     menelaus_alm_update(s);
 802     menelaus_update(s);
 803     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 804         menelaus_rtc_start(s);
 805     return 0;
 806 }
 807
 808 static const VMStateDescription vmstate_menelaus = {
 809     .name = "menelaus",
 810     .version_id = 0,
 811     .minimum_version_id = 0,
 812     .minimum_version_id_old = 0,
 813     .pre_save = menelaus_pre_save,
 814     .post_load = menelaus_post_load,
 815     .fields      = (VMStateField []) {
 816         VMSTATE_INT32(firstbyte, MenelausState),
 817         VMSTATE_UINT8(reg, MenelausState),
 818         VMSTATE_UINT8_ARRAY(vcore, MenelausState, 5),
 819         VMSTATE_UINT8_ARRAY(dcdc, MenelausState, 3),
 820         VMSTATE_UINT8_ARRAY(ldo, MenelausState, 8),
 821         VMSTATE_UINT8_ARRAY(sleep, MenelausState, 2),
 822         VMSTATE_UINT8(osc, MenelausState),
 823         VMSTATE_UINT8(detect, MenelausState),
 824         VMSTATE_UINT16(mask, MenelausState),
 825         VMSTATE_UINT16(status, MenelausState),
 826         VMSTATE_UINT8(dir, MenelausState),
 827         VMSTATE_UINT8(inputs, MenelausState),
 828         VMSTATE_UINT8(outputs, MenelausState),
 829         VMSTATE_UINT8(bbsms, MenelausState),
 830         VMSTATE_UINT8_ARRAY(pull, MenelausState, 4),
 831         VMSTATE_UINT8_ARRAY(mmc_ctrl, MenelausState, 3),
 832         VMSTATE_UINT8(mmc_debounce, MenelausState),
 833         VMSTATE_UINT8(rtc.ctrl, MenelausState),
 834         VMSTATE_UINT16(rtc.comp, MenelausState),
 835         VMSTATE_UINT16(rtc_next_vmstate, MenelausState),
 836         VMSTATE_STRUCT(rtc.new, MenelausState, 0, vmstate_menelaus_tm,
 837                        struct tm),
 838         VMSTATE_STRUCT(rtc.alm, MenelausState, 0, vmstate_menelaus_tm,
 839                        struct tm),
 840         VMSTATE_UINT8(pwrbtn_state, MenelausState),
 841         VMSTATE_I2C_SLAVE(i2c, MenelausState),
 842         VMSTATE_END_OF_LIST()
 843     }
 844 };
 845
 846 static int twl92230_init(i2c_slave *i2c)
 847 {
 848     MenelausState *s = FROM_I2C_SLAVE(MenelausState, i2c);
 849
 850     s->rtc.hz_tm = qemu_new_timer_ms(rt_clock, menelaus_rtc_hz, s);
 851     /* Three output pins plus one interrupt pin.  */
 852     qdev_init_gpio_out(&i2c->qdev, s->out, 4);
 853     qdev_init_gpio_in(&i2c->qdev, menelaus_gpio_set, 3);
 854     s->pwrbtn = qemu_allocate_irqs(menelaus_pwrbtn_set, s, 1)[0];
 855
 856     menelaus_reset(&s->i2c);
 857
 858     return 0;
 859 }
 860
 861 static I2CSlaveInfo twl92230_info = {
 862     .qdev.name ="twl92230",
 863     .qdev.size = sizeof(MenelausState),
 864     .qdev.vmsd = &vmstate_menelaus,
 865     .init = twl92230_init,
 866     .event = menelaus_event,
 867     .recv = menelaus_rx,
 868     .send = menelaus_tx
 869 };
 870
 871 static void twl92230_register_devices(void)
 872 {
 873     i2c_register_slave(&twl92230_info);
 874 }
 875
 876 device_init(twl92230_register_devices)