hw/rtc/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 "qemu/bcd.h"
  31 #include "qemu/module.h"
  32 #include "qom/object.h"
  33
  34 #define VERBOSE 1
  35
  36 #define TYPE_TWL92230 "twl92230"
  37 typedef struct MenelausState MenelausState;
  38 DECLARE_INSTANCE_CHECKER(MenelausState, TWL92230,
  39                          TYPE_TWL92230)
  40
  41 struct MenelausState {
  42     I2CSlave parent_obj;
  43
  44     int firstbyte;
  45     uint8_t reg;
  46
  47     uint8_t vcore[5];
  48     uint8_t dcdc[3];
  49     uint8_t ldo[8];
  50     uint8_t sleep[2];
  51     uint8_t osc;
  52     uint8_t detect;
  53     uint16_t mask;
  54     uint16_t status;
  55     uint8_t dir;
  56     uint8_t inputs;
  57     uint8_t outputs;
  58     uint8_t bbsms;
  59     uint8_t pull[4];
  60     uint8_t mmc_ctrl[3];
  61     uint8_t mmc_debounce;
  62     struct {
  63         uint8_t ctrl;
  64         uint16_t comp;
  65         QEMUTimer *hz_tm;
  66         int64_t next;
  67         struct tm tm;
  68         struct tm new;
  69         struct tm alm;
  70         int sec_offset;
  71         int alm_sec;
  72         int next_comp;
  73     } rtc;
  74     uint16_t rtc_next_vmstate;
  75     qemu_irq out[4];
  76     uint8_t pwrbtn_state;
  77 };
  78
  79 static inline void menelaus_update(MenelausState *s)
  80 {
  81     qemu_set_irq(s->out[3], s->status & ~s->mask);
  82 }
  83
  84 static inline void menelaus_rtc_start(MenelausState *s)
  85 {
  86     s->rtc.next += qemu_clock_get_ms(rtc_clock);
  87     timer_mod(s->rtc.hz_tm, s->rtc.next);
  88 }
  89
  90 static inline void menelaus_rtc_stop(MenelausState *s)
  91 {
  92     timer_del(s->rtc.hz_tm);
  93     s->rtc.next -= qemu_clock_get_ms(rtc_clock);
  94     if (s->rtc.next < 1)
  95         s->rtc.next = 1;
  96 }
  97
  98 static void menelaus_rtc_update(MenelausState *s)
  99 {
 100     qemu_get_timedate(&s->rtc.tm, s->rtc.sec_offset);
 101 }
 102
 103 static void menelaus_alm_update(MenelausState *s)
 104 {
 105     if ((s->rtc.ctrl & 3) == 3)
 106         s->rtc.alm_sec = qemu_timedate_diff(&s->rtc.alm) - s->rtc.sec_offset;
 107 }
 108
 109 static void menelaus_rtc_hz(void *opaque)
 110 {
 111     MenelausState *s = (MenelausState *) opaque;
 112
 113     s->rtc.next_comp --;
 114     s->rtc.alm_sec --;
 115     s->rtc.next += 1000;
 116     timer_mod(s->rtc.hz_tm, s->rtc.next);
 117     if ((s->rtc.ctrl >> 3) & 3) {                               /* EVERY */
 118         menelaus_rtc_update(s);
 119         if (((s->rtc.ctrl >> 3) & 3) == 1 && !s->rtc.tm.tm_sec)
 120             s->status |= 1 << 8;                                /* RTCTMR */
 121         else if (((s->rtc.ctrl >> 3) & 3) == 2 && !s->rtc.tm.tm_min)
 122             s->status |= 1 << 8;                                /* RTCTMR */
 123         else if (!s->rtc.tm.tm_hour)
 124             s->status |= 1 << 8;                                /* RTCTMR */
 125     } else
 126         s->status |= 1 << 8;                                    /* RTCTMR */
 127     if ((s->rtc.ctrl >> 1) & 1) {                               /* RTC_AL_EN */
 128         if (s->rtc.alm_sec == 0)
 129             s->status |= 1 << 9;                                /* RTCALM */
 130         /* TODO: wake-up */
 131     }
 132     if (s->rtc.next_comp <= 0) {
 133         s->rtc.next -= muldiv64((int16_t) s->rtc.comp, 1000, 0x8000);
 134         s->rtc.next_comp = 3600;
 135     }
 136     menelaus_update(s);
 137 }
 138
 139 static void menelaus_reset(I2CSlave *i2c)
 140 {
 141     MenelausState *s = TWL92230(i2c);
 142
 143     s->reg = 0x00;
 144
 145     s->vcore[0] = 0x0c; /* XXX: X-loader needs 0x8c? check!  */
 146     s->vcore[1] = 0x05;
 147     s->vcore[2] = 0x02;
 148     s->vcore[3] = 0x0c;
 149     s->vcore[4] = 0x03;
 150     s->dcdc[0] = 0x33;  /* Depends on wiring */
 151     s->dcdc[1] = 0x03;
 152     s->dcdc[2] = 0x00;
 153     s->ldo[0] = 0x95;
 154     s->ldo[1] = 0x7e;
 155     s->ldo[2] = 0x00;
 156     s->ldo[3] = 0x00;   /* Depends on wiring */
 157     s->ldo[4] = 0x03;   /* Depends on wiring */
 158     s->ldo[5] = 0x00;
 159     s->ldo[6] = 0x00;
 160     s->ldo[7] = 0x00;
 161     s->sleep[0] = 0x00;
 162     s->sleep[1] = 0x00;
 163     s->osc = 0x01;
 164     s->detect = 0x09;
 165     s->mask = 0x0fff;
 166     s->status = 0;
 167     s->dir = 0x07;
 168     s->outputs = 0x00;
 169     s->bbsms = 0x00;
 170     s->pull[0] = 0x00;
 171     s->pull[1] = 0x00;
 172     s->pull[2] = 0x00;
 173     s->pull[3] = 0x00;
 174     s->mmc_ctrl[0] = 0x03;
 175     s->mmc_ctrl[1] = 0xc0;
 176     s->mmc_ctrl[2] = 0x00;
 177     s->mmc_debounce = 0x05;
 178
 179     if (s->rtc.ctrl & 1)
 180         menelaus_rtc_stop(s);
 181     s->rtc.ctrl = 0x00;
 182     s->rtc.comp = 0x0000;
 183     s->rtc.next = 1000;
 184     s->rtc.sec_offset = 0;
 185     s->rtc.next_comp = 1800;
 186     s->rtc.alm_sec = 1800;
 187     s->rtc.alm.tm_sec = 0x00;
 188     s->rtc.alm.tm_min = 0x00;
 189     s->rtc.alm.tm_hour = 0x00;
 190     s->rtc.alm.tm_mday = 0x01;
 191     s->rtc.alm.tm_mon = 0x00;
 192     s->rtc.alm.tm_year = 2004;
 193     menelaus_update(s);
 194 }
 195
 196 static void menelaus_gpio_set(void *opaque, int line, int level)
 197 {
 198     MenelausState *s = (MenelausState *) opaque;
 199
 200     if (line < 3) {
 201         /* No interrupt generated */
 202         s->inputs &= ~(1 << line);
 203         s->inputs |= level << line;
 204         return;
 205     }
 206
 207     if (!s->pwrbtn_state && level) {
 208         s->status |= 1 << 11;                                   /* PSHBTN */
 209         menelaus_update(s);
 210     }
 211     s->pwrbtn_state = level;
 212 }
 213
 214 #define MENELAUS_REV            0x01
 215 #define MENELAUS_VCORE_CTRL1    0x02
 216 #define MENELAUS_VCORE_CTRL2    0x03
 217 #define MENELAUS_VCORE_CTRL3    0x04
 218 #define MENELAUS_VCORE_CTRL4    0x05
 219 #define MENELAUS_VCORE_CTRL5    0x06
 220 #define MENELAUS_DCDC_CTRL1     0x07
 221 #define MENELAUS_DCDC_CTRL2     0x08
 222 #define MENELAUS_DCDC_CTRL3     0x09
 223 #define MENELAUS_LDO_CTRL1      0x0a
 224 #define MENELAUS_LDO_CTRL2      0x0b
 225 #define MENELAUS_LDO_CTRL3      0x0c
 226 #define MENELAUS_LDO_CTRL4      0x0d
 227 #define MENELAUS_LDO_CTRL5      0x0e
 228 #define MENELAUS_LDO_CTRL6      0x0f
 229 #define MENELAUS_LDO_CTRL7      0x10
 230 #define MENELAUS_LDO_CTRL8      0x11
 231 #define MENELAUS_SLEEP_CTRL1    0x12
 232 #define MENELAUS_SLEEP_CTRL2    0x13
 233 #define MENELAUS_DEVICE_OFF     0x14
 234 #define MENELAUS_OSC_CTRL       0x15
 235 #define MENELAUS_DETECT_CTRL    0x16
 236 #define MENELAUS_INT_MASK1      0x17
 237 #define MENELAUS_INT_MASK2      0x18
 238 #define MENELAUS_INT_STATUS1    0x19
 239 #define MENELAUS_INT_STATUS2    0x1a
 240 #define MENELAUS_INT_ACK1       0x1b
 241 #define MENELAUS_INT_ACK2       0x1c
 242 #define MENELAUS_GPIO_CTRL      0x1d
 243 #define MENELAUS_GPIO_IN        0x1e
 244 #define MENELAUS_GPIO_OUT       0x1f
 245 #define MENELAUS_BBSMS          0x20
 246 #define MENELAUS_RTC_CTRL       0x21
 247 #define MENELAUS_RTC_UPDATE     0x22
 248 #define MENELAUS_RTC_SEC        0x23
 249 #define MENELAUS_RTC_MIN        0x24
 250 #define MENELAUS_RTC_HR         0x25
 251 #define MENELAUS_RTC_DAY        0x26
 252 #define MENELAUS_RTC_MON        0x27
 253 #define MENELAUS_RTC_YR         0x28
 254 #define MENELAUS_RTC_WKDAY      0x29
 255 #define MENELAUS_RTC_AL_SEC     0x2a
 256 #define MENELAUS_RTC_AL_MIN     0x2b
 257 #define MENELAUS_RTC_AL_HR      0x2c
 258 #define MENELAUS_RTC_AL_DAY     0x2d
 259 #define MENELAUS_RTC_AL_MON     0x2e
 260 #define MENELAUS_RTC_AL_YR      0x2f
 261 #define MENELAUS_RTC_COMP_MSB   0x30
 262 #define MENELAUS_RTC_COMP_LSB   0x31
 263 #define MENELAUS_S1_PULL_EN     0x32
 264 #define MENELAUS_S1_PULL_DIR    0x33
 265 #define MENELAUS_S2_PULL_EN     0x34
 266 #define MENELAUS_S2_PULL_DIR    0x35
 267 #define MENELAUS_MCT_CTRL1      0x36
 268 #define MENELAUS_MCT_CTRL2      0x37
 269 #define MENELAUS_MCT_CTRL3      0x38
 270 #define MENELAUS_MCT_PIN_ST     0x39
 271 #define MENELAUS_DEBOUNCE1      0x3a
 272
 273 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 274 {
 275     MenelausState *s = (MenelausState *) opaque;
 276     int reg = 0;
 277
 278     switch (addr) {
 279     case MENELAUS_REV:
 280         return 0x22;
 281
 282     case MENELAUS_VCORE_CTRL5: reg ++;
 283     case MENELAUS_VCORE_CTRL4: reg ++;
 284     case MENELAUS_VCORE_CTRL3: reg ++;
 285     case MENELAUS_VCORE_CTRL2: reg ++;
 286     case MENELAUS_VCORE_CTRL1:
 287         return s->vcore[reg];
 288
 289     case MENELAUS_DCDC_CTRL3: reg ++;
 290     case MENELAUS_DCDC_CTRL2: reg ++;
 291     case MENELAUS_DCDC_CTRL1:
 292         return s->dcdc[reg];
 293
 294     case MENELAUS_LDO_CTRL8: reg ++;
 295     case MENELAUS_LDO_CTRL7: reg ++;
 296     case MENELAUS_LDO_CTRL6: reg ++;
 297     case MENELAUS_LDO_CTRL5: reg ++;
 298     case MENELAUS_LDO_CTRL4: reg ++;
 299     case MENELAUS_LDO_CTRL3: reg ++;
 300     case MENELAUS_LDO_CTRL2: reg ++;
 301     case MENELAUS_LDO_CTRL1:
 302         return s->ldo[reg];
 303
 304     case MENELAUS_SLEEP_CTRL2: reg ++;
 305     case MENELAUS_SLEEP_CTRL1:
 306         return s->sleep[reg];
 307
 308     case MENELAUS_DEVICE_OFF:
 309         return 0;
 310
 311     case MENELAUS_OSC_CTRL:
 312         return s->osc | (1 << 7);                       /* CLK32K_GOOD */
 313
 314     case MENELAUS_DETECT_CTRL:
 315         return s->detect;
 316
 317     case MENELAUS_INT_MASK1:
 318         return (s->mask >> 0) & 0xff;
 319     case MENELAUS_INT_MASK2:
 320         return (s->mask >> 8) & 0xff;
 321
 322     case MENELAUS_INT_STATUS1:
 323         return (s->status >> 0) & 0xff;
 324     case MENELAUS_INT_STATUS2:
 325         return (s->status >> 8) & 0xff;
 326
 327     case MENELAUS_INT_ACK1:
 328     case MENELAUS_INT_ACK2:
 329         return 0;
 330
 331     case MENELAUS_GPIO_CTRL:
 332         return s->dir;
 333     case MENELAUS_GPIO_IN:
 334         return s->inputs | (~s->dir & s->outputs);
 335     case MENELAUS_GPIO_OUT:
 336         return s->outputs;
 337
 338     case MENELAUS_BBSMS:
 339         return s->bbsms;
 340
 341     case MENELAUS_RTC_CTRL:
 342         return s->rtc.ctrl;
 343     case MENELAUS_RTC_UPDATE:
 344         return 0x00;
 345     case MENELAUS_RTC_SEC:
 346         menelaus_rtc_update(s);
 347         return to_bcd(s->rtc.tm.tm_sec);
 348     case MENELAUS_RTC_MIN:
 349         menelaus_rtc_update(s);
 350         return to_bcd(s->rtc.tm.tm_min);
 351     case MENELAUS_RTC_HR:
 352         menelaus_rtc_update(s);
 353         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 354             return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
 355                     (!!(s->rtc.tm.tm_hour >= 12) << 7); /* PM_nAM */
 356         else
 357             return to_bcd(s->rtc.tm.tm_hour);
 358     case MENELAUS_RTC_DAY:
 359         menelaus_rtc_update(s);
 360         return to_bcd(s->rtc.tm.tm_mday);
 361     case MENELAUS_RTC_MON:
 362         menelaus_rtc_update(s);
 363         return to_bcd(s->rtc.tm.tm_mon + 1);
 364     case MENELAUS_RTC_YR:
 365         menelaus_rtc_update(s);
 366         return to_bcd(s->rtc.tm.tm_year - 2000);
 367     case MENELAUS_RTC_WKDAY:
 368         menelaus_rtc_update(s);
 369         return to_bcd(s->rtc.tm.tm_wday);
 370     case MENELAUS_RTC_AL_SEC:
 371         return to_bcd(s->rtc.alm.tm_sec);
 372     case MENELAUS_RTC_AL_MIN:
 373         return to_bcd(s->rtc.alm.tm_min);
 374     case MENELAUS_RTC_AL_HR:
 375         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 376             return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
 377                     (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
 378         else
 379             return to_bcd(s->rtc.alm.tm_hour);
 380     case MENELAUS_RTC_AL_DAY:
 381         return to_bcd(s->rtc.alm.tm_mday);
 382     case MENELAUS_RTC_AL_MON:
 383         return to_bcd(s->rtc.alm.tm_mon + 1);
 384     case MENELAUS_RTC_AL_YR:
 385         return to_bcd(s->rtc.alm.tm_year - 2000);
 386     case MENELAUS_RTC_COMP_MSB:
 387         return (s->rtc.comp >> 8) & 0xff;
 388     case MENELAUS_RTC_COMP_LSB:
 389         return (s->rtc.comp >> 0) & 0xff;
 390
 391     case MENELAUS_S1_PULL_EN:
 392         return s->pull[0];
 393     case MENELAUS_S1_PULL_DIR:
 394         return s->pull[1];
 395     case MENELAUS_S2_PULL_EN:
 396         return s->pull[2];
 397     case MENELAUS_S2_PULL_DIR:
 398         return s->pull[3];
 399
 400     case MENELAUS_MCT_CTRL3: reg ++;
 401     case MENELAUS_MCT_CTRL2: reg ++;
 402     case MENELAUS_MCT_CTRL1:
 403         return s->mmc_ctrl[reg];
 404     case MENELAUS_MCT_PIN_ST:
 405         /* TODO: return the real Card Detect */
 406         return 0;
 407     case MENELAUS_DEBOUNCE1:
 408         return s->mmc_debounce;
 409
 410     default:
 411 #ifdef VERBOSE
 412         printf("%s: unknown register %02x\n", __func__, addr);
 413 #endif
 414         break;
 415     }
 416     return 0;
 417 }
 418
 419 static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 420 {
 421     MenelausState *s = (MenelausState *) opaque;
 422     int line;
 423     int reg = 0;
 424     struct tm tm;
 425
 426     switch (addr) {
 427     case MENELAUS_VCORE_CTRL1:
 428         s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
 429         break;
 430     case MENELAUS_VCORE_CTRL2:
 431         s->vcore[1] = value;
 432         break;
 433     case MENELAUS_VCORE_CTRL3:
 434         s->vcore[2] = MIN(value & 0x1f, 0x12);
 435         break;
 436     case MENELAUS_VCORE_CTRL4:
 437         s->vcore[3] = MIN(value & 0x1f, 0x12);
 438         break;
 439     case MENELAUS_VCORE_CTRL5:
 440         s->vcore[4] = value & 3;
 441         /* XXX
 442          * auto set to 3 on M_Active, nRESWARM
 443          * auto set to 0 on M_WaitOn, M_Backup
 444          */
 445         break;
 446
 447     case MENELAUS_DCDC_CTRL1:
 448         s->dcdc[0] = value & 0x3f;
 449         break;
 450     case MENELAUS_DCDC_CTRL2:
 451         s->dcdc[1] = value & 0x07;
 452         /* XXX
 453          * auto set to 3 on M_Active, nRESWARM
 454          * auto set to 0 on M_WaitOn, M_Backup
 455          */
 456         break;
 457     case MENELAUS_DCDC_CTRL3:
 458         s->dcdc[2] = value & 0x07;
 459         break;
 460
 461     case MENELAUS_LDO_CTRL1:
 462         s->ldo[0] = value;
 463         break;
 464     case MENELAUS_LDO_CTRL2:
 465         s->ldo[1] = value & 0x7f;
 466         /* XXX
 467          * auto set to 0x7e on M_WaitOn, M_Backup
 468          */
 469         break;
 470     case MENELAUS_LDO_CTRL3:
 471         s->ldo[2] = value & 3;
 472         /* XXX
 473          * auto set to 3 on M_Active, nRESWARM
 474          * auto set to 0 on M_WaitOn, M_Backup
 475          */
 476         break;
 477     case MENELAUS_LDO_CTRL4:
 478         s->ldo[3] = value & 3;
 479         /* XXX
 480          * auto set to 3 on M_Active, nRESWARM
 481          * auto set to 0 on M_WaitOn, M_Backup
 482          */
 483         break;
 484     case MENELAUS_LDO_CTRL5:
 485         s->ldo[4] = value & 3;
 486         /* XXX
 487          * auto set to 3 on M_Active, nRESWARM
 488          * auto set to 0 on M_WaitOn, M_Backup
 489          */
 490         break;
 491     case MENELAUS_LDO_CTRL6:
 492         s->ldo[5] = value & 3;
 493         break;
 494     case MENELAUS_LDO_CTRL7:
 495         s->ldo[6] = value & 3;
 496         break;
 497     case MENELAUS_LDO_CTRL8:
 498         s->ldo[7] = value & 3;
 499         break;
 500
 501     case MENELAUS_SLEEP_CTRL2: reg ++;
 502     case MENELAUS_SLEEP_CTRL1:
 503         s->sleep[reg] = value;
 504         break;
 505
 506     case MENELAUS_DEVICE_OFF:
 507         if (value & 1) {
 508             menelaus_reset(I2C_SLAVE(s));
 509         }
 510         break;
 511
 512     case MENELAUS_OSC_CTRL:
 513         s->osc = value & 7;
 514         break;
 515
 516     case MENELAUS_DETECT_CTRL:
 517         s->detect = value & 0x7f;
 518         break;
 519
 520     case MENELAUS_INT_MASK1:
 521         s->mask &= 0xf00;
 522         s->mask |= value << 0;
 523         menelaus_update(s);
 524         break;
 525     case MENELAUS_INT_MASK2:
 526         s->mask &= 0x0ff;
 527         s->mask |= value << 8;
 528         menelaus_update(s);
 529         break;
 530
 531     case MENELAUS_INT_ACK1:
 532         s->status &= ~(((uint16_t) value) << 0);
 533         menelaus_update(s);
 534         break;
 535     case MENELAUS_INT_ACK2:
 536         s->status &= ~(((uint16_t) value) << 8);
 537         menelaus_update(s);
 538         break;
 539
 540     case MENELAUS_GPIO_CTRL:
 541         for (line = 0; line < 3; line ++) {
 542             if (((s->dir ^ value) >> line) & 1) {
 543                 qemu_set_irq(s->out[line],
 544                              ((s->outputs & ~s->dir) >> line) & 1);
 545             }
 546         }
 547         s->dir = value & 0x67;
 548         break;
 549     case MENELAUS_GPIO_OUT:
 550         for (line = 0; line < 3; line ++) {
 551             if ((((s->outputs ^ value) & ~s->dir) >> line) & 1) {
 552                 qemu_set_irq(s->out[line], (s->outputs >> line) & 1);
 553             }
 554         }
 555         s->outputs = value & 0x07;
 556         break;
 557
 558     case MENELAUS_BBSMS:
 559         s->bbsms = 0x0d;
 560         break;
 561
 562     case MENELAUS_RTC_CTRL:
 563         if ((s->rtc.ctrl ^ value) & 1) {                        /* RTC_EN */
 564             if (value & 1)
 565                 menelaus_rtc_start(s);
 566             else
 567                 menelaus_rtc_stop(s);
 568         }
 569         s->rtc.ctrl = value & 0x1f;
 570         menelaus_alm_update(s);
 571         break;
 572     case MENELAUS_RTC_UPDATE:
 573         menelaus_rtc_update(s);
 574         memcpy(&tm, &s->rtc.tm, sizeof(tm));
 575         switch (value & 0xf) {
 576         case 0:
 577             break;
 578         case 1:
 579             tm.tm_sec = s->rtc.new.tm_sec;
 580             break;
 581         case 2:
 582             tm.tm_min = s->rtc.new.tm_min;
 583             break;
 584         case 3:
 585             if (s->rtc.new.tm_hour > 23)
 586                 goto rtc_badness;
 587             tm.tm_hour = s->rtc.new.tm_hour;
 588             break;
 589         case 4:
 590             if (s->rtc.new.tm_mday < 1)
 591                 goto rtc_badness;
 592             /* TODO check range */
 593             tm.tm_mday = s->rtc.new.tm_mday;
 594             break;
 595         case 5:
 596             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 597                 goto rtc_badness;
 598             tm.tm_mon = s->rtc.new.tm_mon;
 599             break;
 600         case 6:
 601             tm.tm_year = s->rtc.new.tm_year;
 602             break;
 603         case 7:
 604             /* TODO set .tm_mday instead */
 605             tm.tm_wday = s->rtc.new.tm_wday;
 606             break;
 607         case 8:
 608             if (s->rtc.new.tm_hour > 23)
 609                 goto rtc_badness;
 610             if (s->rtc.new.tm_mday < 1)
 611                 goto rtc_badness;
 612             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 613                 goto rtc_badness;
 614             tm.tm_sec = s->rtc.new.tm_sec;
 615             tm.tm_min = s->rtc.new.tm_min;
 616             tm.tm_hour = s->rtc.new.tm_hour;
 617             tm.tm_mday = s->rtc.new.tm_mday;
 618             tm.tm_mon = s->rtc.new.tm_mon;
 619             tm.tm_year = s->rtc.new.tm_year;
 620             break;
 621         rtc_badness:
 622         default:
 623             fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
 624                             __func__, value);
 625             s->status |= 1 << 10;                               /* RTCERR */
 626             menelaus_update(s);
 627         }
 628         s->rtc.sec_offset = qemu_timedate_diff(&tm);
 629         break;
 630     case MENELAUS_RTC_SEC:
 631         s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
 632         break;
 633     case MENELAUS_RTC_MIN:
 634         s->rtc.tm.tm_min = from_bcd(value & 0x7f);
 635         break;
 636     case MENELAUS_RTC_HR:
 637         s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?  /* MODE12_n24 */
 638                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 639                 from_bcd(value & 0x3f);
 640         break;
 641     case MENELAUS_RTC_DAY:
 642         s->rtc.tm.tm_mday = from_bcd(value);
 643         break;
 644     case MENELAUS_RTC_MON:
 645         s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
 646         break;
 647     case MENELAUS_RTC_YR:
 648         s->rtc.tm.tm_year = 2000 + from_bcd(value);
 649         break;
 650     case MENELAUS_RTC_WKDAY:
 651         s->rtc.tm.tm_mday = from_bcd(value);
 652         break;
 653     case MENELAUS_RTC_AL_SEC:
 654         s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
 655         menelaus_alm_update(s);
 656         break;
 657     case MENELAUS_RTC_AL_MIN:
 658         s->rtc.alm.tm_min = from_bcd(value & 0x7f);
 659         menelaus_alm_update(s);
 660         break;
 661     case MENELAUS_RTC_AL_HR:
 662         s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ? /* MODE12_n24 */
 663                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 664                 from_bcd(value & 0x3f);
 665         menelaus_alm_update(s);
 666         break;
 667     case MENELAUS_RTC_AL_DAY:
 668         s->rtc.alm.tm_mday = from_bcd(value);
 669         menelaus_alm_update(s);
 670         break;
 671     case MENELAUS_RTC_AL_MON:
 672         s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
 673         menelaus_alm_update(s);
 674         break;
 675     case MENELAUS_RTC_AL_YR:
 676         s->rtc.alm.tm_year = 2000 + from_bcd(value);
 677         menelaus_alm_update(s);
 678         break;
 679     case MENELAUS_RTC_COMP_MSB:
 680         s->rtc.comp &= 0xff;
 681         s->rtc.comp |= value << 8;
 682         break;
 683     case MENELAUS_RTC_COMP_LSB:
 684         s->rtc.comp &= 0xff << 8;
 685         s->rtc.comp |= value;
 686         break;
 687
 688     case MENELAUS_S1_PULL_EN:
 689         s->pull[0] = value;
 690         break;
 691     case MENELAUS_S1_PULL_DIR:
 692         s->pull[1] = value & 0x1f;
 693         break;
 694     case MENELAUS_S2_PULL_EN:
 695         s->pull[2] = value;
 696         break;
 697     case MENELAUS_S2_PULL_DIR:
 698         s->pull[3] = value & 0x1f;
 699         break;
 700
 701     case MENELAUS_MCT_CTRL1:
 702         s->mmc_ctrl[0] = value & 0x7f;
 703         break;
 704     case MENELAUS_MCT_CTRL2:
 705         s->mmc_ctrl[1] = value;
 706         /* TODO update Card Detect interrupts */
 707         break;
 708     case MENELAUS_MCT_CTRL3:
 709         s->mmc_ctrl[2] = value & 0xf;
 710         break;
 711     case MENELAUS_DEBOUNCE1:
 712         s->mmc_debounce = value & 0x3f;
 713         break;
 714
 715     default:
 716 #ifdef VERBOSE
 717         printf("%s: unknown register %02x\n", __func__, addr);
 718 #endif
 719     }
 720 }
 721
 722 static int menelaus_event(I2CSlave *i2c, enum i2c_event event)
 723 {
 724     MenelausState *s = TWL92230(i2c);
 725
 726     if (event == I2C_START_SEND)
 727         s->firstbyte = 1;
 728
 729     return 0;
 730 }
 731
 732 static int menelaus_tx(I2CSlave *i2c, uint8_t data)
 733 {
 734     MenelausState *s = TWL92230(i2c);
 735
 736     /* Interpret register address byte */
 737     if (s->firstbyte) {
 738         s->reg = data;
 739         s->firstbyte = 0;
 740     } else
 741         menelaus_write(s, s->reg ++, data);
 742
 743     return 0;
 744 }
 745
 746 static uint8_t menelaus_rx(I2CSlave *i2c)
 747 {
 748     MenelausState *s = TWL92230(i2c);
 749
 750     return menelaus_read(s, s->reg ++);
 751 }
 752
 753 /* Save restore 32 bit int as uint16_t
 754    This is a Big hack, but it is how the old state did it.
 755    Or we broke compatibility in the state, or we can't use struct tm
 756  */
 757
 758 static int get_int32_as_uint16(QEMUFile *f, void *pv, size_t size,
 759                                const VMStateField *field)
 760 {
 761     int *v = pv;
 762     *v = qemu_get_be16(f);
 763     return 0;
 764 }
 765
 766 static int put_int32_as_uint16(QEMUFile *f, void *pv, size_t size,
 767                                const VMStateField *field, QJSON *vmdesc)
 768 {
 769     int *v = pv;
 770     qemu_put_be16(f, *v);
 771
 772     return 0;
 773 }
 774
 775 static const VMStateInfo vmstate_hack_int32_as_uint16 = {
 776     .name = "int32_as_uint16",
 777     .get  = get_int32_as_uint16,
 778     .put  = put_int32_as_uint16,
 779 };
 780
 781 #define VMSTATE_UINT16_HACK(_f, _s)                                  \
 782     VMSTATE_SINGLE(_f, _s, 0, vmstate_hack_int32_as_uint16, int32_t)
 783
 784
 785 static const VMStateDescription vmstate_menelaus_tm = {
 786     .name = "menelaus_tm",
 787     .version_id = 0,
 788     .minimum_version_id = 0,
 789     .fields = (VMStateField[]) {
 790         VMSTATE_UINT16_HACK(tm_sec, struct tm),
 791         VMSTATE_UINT16_HACK(tm_min, struct tm),
 792         VMSTATE_UINT16_HACK(tm_hour, struct tm),
 793         VMSTATE_UINT16_HACK(tm_mday, struct tm),
 794         VMSTATE_UINT16_HACK(tm_min, struct tm),
 795         VMSTATE_UINT16_HACK(tm_year, struct tm),
 796         VMSTATE_END_OF_LIST()
 797     }
 798 };
 799
 800 static int menelaus_pre_save(void *opaque)
 801 {
 802     MenelausState *s = opaque;
 803     /* Should be <= 1000 */
 804     s->rtc_next_vmstate =  s->rtc.next - qemu_clock_get_ms(rtc_clock);
 805
 806     return 0;
 807 }
 808
 809 static int menelaus_post_load(void *opaque, int version_id)
 810 {
 811     MenelausState *s = opaque;
 812
 813     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 814         menelaus_rtc_stop(s);
 815
 816     s->rtc.next = s->rtc_next_vmstate;
 817
 818     menelaus_alm_update(s);
 819     menelaus_update(s);
 820     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 821         menelaus_rtc_start(s);
 822     return 0;
 823 }
 824
 825 static const VMStateDescription vmstate_menelaus = {
 826     .name = "menelaus",
 827     .version_id = 0,
 828     .minimum_version_id = 0,
 829     .pre_save = menelaus_pre_save,
 830     .post_load = menelaus_post_load,
 831     .fields = (VMStateField[]) {
 832         VMSTATE_INT32(firstbyte, MenelausState),
 833         VMSTATE_UINT8(reg, MenelausState),
 834         VMSTATE_UINT8_ARRAY(vcore, MenelausState, 5),
 835         VMSTATE_UINT8_ARRAY(dcdc, MenelausState, 3),
 836         VMSTATE_UINT8_ARRAY(ldo, MenelausState, 8),
 837         VMSTATE_UINT8_ARRAY(sleep, MenelausState, 2),
 838         VMSTATE_UINT8(osc, MenelausState),
 839         VMSTATE_UINT8(detect, MenelausState),
 840         VMSTATE_UINT16(mask, MenelausState),
 841         VMSTATE_UINT16(status, MenelausState),
 842         VMSTATE_UINT8(dir, MenelausState),
 843         VMSTATE_UINT8(inputs, MenelausState),
 844         VMSTATE_UINT8(outputs, MenelausState),
 845         VMSTATE_UINT8(bbsms, MenelausState),
 846         VMSTATE_UINT8_ARRAY(pull, MenelausState, 4),
 847         VMSTATE_UINT8_ARRAY(mmc_ctrl, MenelausState, 3),
 848         VMSTATE_UINT8(mmc_debounce, MenelausState),
 849         VMSTATE_UINT8(rtc.ctrl, MenelausState),
 850         VMSTATE_UINT16(rtc.comp, MenelausState),
 851         VMSTATE_UINT16(rtc_next_vmstate, MenelausState),
 852         VMSTATE_STRUCT(rtc.new, MenelausState, 0, vmstate_menelaus_tm,
 853                        struct tm),
 854         VMSTATE_STRUCT(rtc.alm, MenelausState, 0, vmstate_menelaus_tm,
 855                        struct tm),
 856         VMSTATE_UINT8(pwrbtn_state, MenelausState),
 857         VMSTATE_I2C_SLAVE(parent_obj, MenelausState),
 858         VMSTATE_END_OF_LIST()
 859     }
 860 };
 861
 862 static void twl92230_realize(DeviceState *dev, Error **errp)
 863 {
 864     MenelausState *s = TWL92230(dev);
 865
 866     s->rtc.hz_tm = timer_new_ms(rtc_clock, menelaus_rtc_hz, s);
 867     /* Three output pins plus one interrupt pin.  */
 868     qdev_init_gpio_out(dev, s->out, 4);
 869
 870     /* Three input pins plus one power-button pin.  */
 871     qdev_init_gpio_in(dev, menelaus_gpio_set, 4);
 872
 873     menelaus_reset(I2C_SLAVE(dev));
 874 }
 875
 876 static void twl92230_class_init(ObjectClass *klass, void *data)
 877 {
 878     DeviceClass *dc = DEVICE_CLASS(klass);
 879     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 880
 881     dc->realize = twl92230_realize;
 882     sc->event = menelaus_event;
 883     sc->recv = menelaus_rx;
 884     sc->send = menelaus_tx;
 885     dc->vmsd = &vmstate_menelaus;
 886 }
 887
 888 static const TypeInfo twl92230_info = {
 889     .name          = TYPE_TWL92230,
 890     .parent        = TYPE_I2C_SLAVE,
 891     .instance_size = sizeof(MenelausState),
 892     .class_init    = twl92230_class_init,
 893 };
 894
 895 static void twl92230_register_types(void)
 896 {
 897     type_register_static(&twl92230_info);
 898 }
 899
 900 type_init(twl92230_register_types)