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