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(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(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 inline uint8_t to_bcd(int val)
 187 {
 188     return ((val / 10) << 4) | (val % 10);
 189 }
 190
 191 static inline int from_bcd(uint8_t val)
 192 {
 193     return ((val >> 4) * 10) + (val & 0x0f);
 194 }
 195
 196 static void menelaus_gpio_set(void *opaque, int line, int level)
 197 {
 198     MenelausState *s = (MenelausState *) opaque;
 199
 200     /* No interrupt generated */
 201     s->inputs &= ~(1 << line);
 202     s->inputs |= level << line;
 203 }
 204
 205 static void menelaus_pwrbtn_set(void *opaque, int line, int level)
 206 {
 207     MenelausState *s = (MenelausState *) opaque;
 208
 209     if (!s->pwrbtn_state && level) {
 210         s->status |= 1 << 11;                                   /* PSHBTN */
 211         menelaus_update(s);
 212     }
 213     s->pwrbtn_state = level;
 214 }
 215
 216 #define MENELAUS_REV            0x01
 217 #define MENELAUS_VCORE_CTRL1    0x02
 218 #define MENELAUS_VCORE_CTRL2    0x03
 219 #define MENELAUS_VCORE_CTRL3    0x04
 220 #define MENELAUS_VCORE_CTRL4    0x05
 221 #define MENELAUS_VCORE_CTRL5    0x06
 222 #define MENELAUS_DCDC_CTRL1     0x07
 223 #define MENELAUS_DCDC_CTRL2     0x08
 224 #define MENELAUS_DCDC_CTRL3     0x09
 225 #define MENELAUS_LDO_CTRL1      0x0a
 226 #define MENELAUS_LDO_CTRL2      0x0b
 227 #define MENELAUS_LDO_CTRL3      0x0c
 228 #define MENELAUS_LDO_CTRL4      0x0d
 229 #define MENELAUS_LDO_CTRL5      0x0e
 230 #define MENELAUS_LDO_CTRL6      0x0f
 231 #define MENELAUS_LDO_CTRL7      0x10
 232 #define MENELAUS_LDO_CTRL8      0x11
 233 #define MENELAUS_SLEEP_CTRL1    0x12
 234 #define MENELAUS_SLEEP_CTRL2    0x13
 235 #define MENELAUS_DEVICE_OFF     0x14
 236 #define MENELAUS_OSC_CTRL       0x15
 237 #define MENELAUS_DETECT_CTRL    0x16
 238 #define MENELAUS_INT_MASK1      0x17
 239 #define MENELAUS_INT_MASK2      0x18
 240 #define MENELAUS_INT_STATUS1    0x19
 241 #define MENELAUS_INT_STATUS2    0x1a
 242 #define MENELAUS_INT_ACK1       0x1b
 243 #define MENELAUS_INT_ACK2       0x1c
 244 #define MENELAUS_GPIO_CTRL      0x1d
 245 #define MENELAUS_GPIO_IN        0x1e
 246 #define MENELAUS_GPIO_OUT       0x1f
 247 #define MENELAUS_BBSMS          0x20
 248 #define MENELAUS_RTC_CTRL       0x21
 249 #define MENELAUS_RTC_UPDATE     0x22
 250 #define MENELAUS_RTC_SEC        0x23
 251 #define MENELAUS_RTC_MIN        0x24
 252 #define MENELAUS_RTC_HR         0x25
 253 #define MENELAUS_RTC_DAY        0x26
 254 #define MENELAUS_RTC_MON        0x27
 255 #define MENELAUS_RTC_YR         0x28
 256 #define MENELAUS_RTC_WKDAY      0x29
 257 #define MENELAUS_RTC_AL_SEC     0x2a
 258 #define MENELAUS_RTC_AL_MIN     0x2b
 259 #define MENELAUS_RTC_AL_HR      0x2c
 260 #define MENELAUS_RTC_AL_DAY     0x2d
 261 #define MENELAUS_RTC_AL_MON     0x2e
 262 #define MENELAUS_RTC_AL_YR      0x2f
 263 #define MENELAUS_RTC_COMP_MSB   0x30
 264 #define MENELAUS_RTC_COMP_LSB   0x31
 265 #define MENELAUS_S1_PULL_EN     0x32
 266 #define MENELAUS_S1_PULL_DIR    0x33
 267 #define MENELAUS_S2_PULL_EN     0x34
 268 #define MENELAUS_S2_PULL_DIR    0x35
 269 #define MENELAUS_MCT_CTRL1      0x36
 270 #define MENELAUS_MCT_CTRL2      0x37
 271 #define MENELAUS_MCT_CTRL3      0x38
 272 #define MENELAUS_MCT_PIN_ST     0x39
 273 #define MENELAUS_DEBOUNCE1      0x3a
 274
 275 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 276 {
 277     MenelausState *s = (MenelausState *) opaque;
 278     int reg = 0;
 279
 280     switch (addr) {
 281     case MENELAUS_REV:
 282         return 0x22;
 283
 284     case MENELAUS_VCORE_CTRL5: reg ++;
 285     case MENELAUS_VCORE_CTRL4: reg ++;
 286     case MENELAUS_VCORE_CTRL3: reg ++;
 287     case MENELAUS_VCORE_CTRL2: reg ++;
 288     case MENELAUS_VCORE_CTRL1:
 289         return s->vcore[reg];
 290
 291     case MENELAUS_DCDC_CTRL3: reg ++;
 292     case MENELAUS_DCDC_CTRL2: reg ++;
 293     case MENELAUS_DCDC_CTRL1:
 294         return s->dcdc[reg];
 295
 296     case MENELAUS_LDO_CTRL8: reg ++;
 297     case MENELAUS_LDO_CTRL7: reg ++;
 298     case MENELAUS_LDO_CTRL6: reg ++;
 299     case MENELAUS_LDO_CTRL5: reg ++;
 300     case MENELAUS_LDO_CTRL4: reg ++;
 301     case MENELAUS_LDO_CTRL3: reg ++;
 302     case MENELAUS_LDO_CTRL2: reg ++;
 303     case MENELAUS_LDO_CTRL1:
 304         return s->ldo[reg];
 305
 306     case MENELAUS_SLEEP_CTRL2: reg ++;
 307     case MENELAUS_SLEEP_CTRL1:
 308         return s->sleep[reg];
 309
 310     case MENELAUS_DEVICE_OFF:
 311         return 0;
 312
 313     case MENELAUS_OSC_CTRL:
 314         return s->osc | (1 << 7);                       /* CLK32K_GOOD */
 315
 316     case MENELAUS_DETECT_CTRL:
 317         return s->detect;
 318
 319     case MENELAUS_INT_MASK1:
 320         return (s->mask >> 0) & 0xff;
 321     case MENELAUS_INT_MASK2:
 322         return (s->mask >> 8) & 0xff;
 323
 324     case MENELAUS_INT_STATUS1:
 325         return (s->status >> 0) & 0xff;
 326     case MENELAUS_INT_STATUS2:
 327         return (s->status >> 8) & 0xff;
 328
 329     case MENELAUS_INT_ACK1:
 330     case MENELAUS_INT_ACK2:
 331         return 0;
 332
 333     case MENELAUS_GPIO_CTRL:
 334         return s->dir;
 335     case MENELAUS_GPIO_IN:
 336         return s->inputs | (~s->dir & s->outputs);
 337     case MENELAUS_GPIO_OUT:
 338         return s->outputs;
 339
 340     case MENELAUS_BBSMS:
 341         return s->bbsms;
 342
 343     case MENELAUS_RTC_CTRL:
 344         return s->rtc.ctrl;
 345     case MENELAUS_RTC_UPDATE:
 346         return 0x00;
 347     case MENELAUS_RTC_SEC:
 348         menelaus_rtc_update(s);
 349         return to_bcd(s->rtc.tm.tm_sec);
 350     case MENELAUS_RTC_MIN:
 351         menelaus_rtc_update(s);
 352         return to_bcd(s->rtc.tm.tm_min);
 353     case MENELAUS_RTC_HR:
 354         menelaus_rtc_update(s);
 355         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 356             return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
 357                     (!!(s->rtc.tm.tm_hour >= 12) << 7); /* PM_nAM */
 358         else
 359             return to_bcd(s->rtc.tm.tm_hour);
 360     case MENELAUS_RTC_DAY:
 361         menelaus_rtc_update(s);
 362         return to_bcd(s->rtc.tm.tm_mday);
 363     case MENELAUS_RTC_MON:
 364         menelaus_rtc_update(s);
 365         return to_bcd(s->rtc.tm.tm_mon + 1);
 366     case MENELAUS_RTC_YR:
 367         menelaus_rtc_update(s);
 368         return to_bcd(s->rtc.tm.tm_year - 2000);
 369     case MENELAUS_RTC_WKDAY:
 370         menelaus_rtc_update(s);
 371         return to_bcd(s->rtc.tm.tm_wday);
 372     case MENELAUS_RTC_AL_SEC:
 373         return to_bcd(s->rtc.alm.tm_sec);
 374     case MENELAUS_RTC_AL_MIN:
 375         return to_bcd(s->rtc.alm.tm_min);
 376     case MENELAUS_RTC_AL_HR:
 377         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 378             return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
 379                     (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
 380         else
 381             return to_bcd(s->rtc.alm.tm_hour);
 382     case MENELAUS_RTC_AL_DAY:
 383         return to_bcd(s->rtc.alm.tm_mday);
 384     case MENELAUS_RTC_AL_MON:
 385         return to_bcd(s->rtc.alm.tm_mon + 1);
 386     case MENELAUS_RTC_AL_YR:
 387         return to_bcd(s->rtc.alm.tm_year - 2000);
 388     case MENELAUS_RTC_COMP_MSB:
 389         return (s->rtc.comp >> 8) & 0xff;
 390     case MENELAUS_RTC_COMP_LSB:
 391         return (s->rtc.comp >> 0) & 0xff;
 392
 393     case MENELAUS_S1_PULL_EN:
 394         return s->pull[0];
 395     case MENELAUS_S1_PULL_DIR:
 396         return s->pull[1];
 397     case MENELAUS_S2_PULL_EN:
 398         return s->pull[2];
 399     case MENELAUS_S2_PULL_DIR:
 400         return s->pull[3];
 401
 402     case MENELAUS_MCT_CTRL3: reg ++;
 403     case MENELAUS_MCT_CTRL2: reg ++;
 404     case MENELAUS_MCT_CTRL1:
 405         return s->mmc_ctrl[reg];
 406     case MENELAUS_MCT_PIN_ST:
 407         /* TODO: return the real Card Detect */
 408         return 0;
 409     case MENELAUS_DEBOUNCE1:
 410         return s->mmc_debounce;
 411
 412     default:
 413 #ifdef VERBOSE
 414         printf("%s: unknown register %02x\n", __FUNCTION__, addr);
 415 #endif
 416         break;
 417     }
 418     return 0;
 419 }
 420
 421 static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 422 {
 423     MenelausState *s = (MenelausState *) opaque;
 424     int line;
 425     int reg = 0;
 426     struct tm tm;
 427
 428     switch (addr) {
 429     case MENELAUS_VCORE_CTRL1:
 430         s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
 431         break;
 432     case MENELAUS_VCORE_CTRL2:
 433         s->vcore[1] = value;
 434         break;
 435     case MENELAUS_VCORE_CTRL3:
 436         s->vcore[2] = MIN(value & 0x1f, 0x12);
 437         break;
 438     case MENELAUS_VCORE_CTRL4:
 439         s->vcore[3] = MIN(value & 0x1f, 0x12);
 440         break;
 441     case MENELAUS_VCORE_CTRL5:
 442         s->vcore[4] = value & 3;
 443         /* XXX
 444          * auto set to 3 on M_Active, nRESWARM
 445          * auto set to 0 on M_WaitOn, M_Backup
 446          */
 447         break;
 448
 449     case MENELAUS_DCDC_CTRL1:
 450         s->dcdc[0] = value & 0x3f;
 451         break;
 452     case MENELAUS_DCDC_CTRL2:
 453         s->dcdc[1] = value & 0x07;
 454         /* XXX
 455          * auto set to 3 on M_Active, nRESWARM
 456          * auto set to 0 on M_WaitOn, M_Backup
 457          */
 458         break;
 459     case MENELAUS_DCDC_CTRL3:
 460         s->dcdc[2] = value & 0x07;
 461         break;
 462
 463     case MENELAUS_LDO_CTRL1:
 464         s->ldo[0] = value;
 465         break;
 466     case MENELAUS_LDO_CTRL2:
 467         s->ldo[1] = value & 0x7f;
 468         /* XXX
 469          * auto set to 0x7e on M_WaitOn, M_Backup
 470          */
 471         break;
 472     case MENELAUS_LDO_CTRL3:
 473         s->ldo[2] = 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_CTRL4:
 480         s->ldo[3] = value & 3;
 481         /* XXX
 482          * auto set to 3 on M_Active, nRESWARM
 483          * auto set to 0 on M_WaitOn, M_Backup
 484          */
 485         break;
 486     case MENELAUS_LDO_CTRL5:
 487         s->ldo[4] = value & 3;
 488         /* XXX
 489          * auto set to 3 on M_Active, nRESWARM
 490          * auto set to 0 on M_WaitOn, M_Backup
 491          */
 492         break;
 493     case MENELAUS_LDO_CTRL6:
 494         s->ldo[5] = value & 3;
 495         break;
 496     case MENELAUS_LDO_CTRL7:
 497         s->ldo[6] = value & 3;
 498         break;
 499     case MENELAUS_LDO_CTRL8:
 500         s->ldo[7] = value & 3;
 501         break;
 502
 503     case MENELAUS_SLEEP_CTRL2: reg ++;
 504     case MENELAUS_SLEEP_CTRL1:
 505         s->sleep[reg] = value;
 506         break;
 507
 508     case MENELAUS_DEVICE_OFF:
 509         if (value & 1)
 510             menelaus_reset(&s->i2c);
 511         break;
 512
 513     case MENELAUS_OSC_CTRL:
 514         s->osc = value & 7;
 515         break;
 516
 517     case MENELAUS_DETECT_CTRL:
 518         s->detect = value & 0x7f;
 519         break;
 520
 521     case MENELAUS_INT_MASK1:
 522         s->mask &= 0xf00;
 523         s->mask |= value << 0;
 524         menelaus_update(s);
 525         break;
 526     case MENELAUS_INT_MASK2:
 527         s->mask &= 0x0ff;
 528         s->mask |= value << 8;
 529         menelaus_update(s);
 530         break;
 531
 532     case MENELAUS_INT_ACK1:
 533         s->status &= ~(((uint16_t) value) << 0);
 534         menelaus_update(s);
 535         break;
 536     case MENELAUS_INT_ACK2:
 537         s->status &= ~(((uint16_t) value) << 8);
 538         menelaus_update(s);
 539         break;
 540
 541     case MENELAUS_GPIO_CTRL:
 542         for (line = 0; line < 3; line ++) {
 543             if (((s->dir ^ value) >> line) & 1) {
 544                 qemu_set_irq(s->out[line],
 545                              ((s->outputs & ~s->dir) >> line) & 1);
 546             }
 547         }
 548         s->dir = value & 0x67;
 549         break;
 550     case MENELAUS_GPIO_OUT:
 551         for (line = 0; line < 3; line ++) {
 552             if ((((s->outputs ^ value) & ~s->dir) >> line) & 1) {
 553                 qemu_set_irq(s->out[line], (s->outputs >> line) & 1);
 554             }
 555         }
 556         s->outputs = value & 0x07;
 557         break;
 558
 559     case MENELAUS_BBSMS:
 560         s->bbsms = 0x0d;
 561         break;
 562
 563     case MENELAUS_RTC_CTRL:
 564         if ((s->rtc.ctrl ^ value) & 1) {                        /* RTC_EN */
 565             if (value & 1)
 566                 menelaus_rtc_start(s);
 567             else
 568                 menelaus_rtc_stop(s);
 569         }
 570         s->rtc.ctrl = value & 0x1f;
 571         menelaus_alm_update(s);
 572         break;
 573     case MENELAUS_RTC_UPDATE:
 574         menelaus_rtc_update(s);
 575         memcpy(&tm, &s->rtc.tm, sizeof(tm));
 576         switch (value & 0xf) {
 577         case 0:
 578             break;
 579         case 1:
 580             tm.tm_sec = s->rtc.new.tm_sec;
 581             break;
 582         case 2:
 583             tm.tm_min = s->rtc.new.tm_min;
 584             break;
 585         case 3:
 586             if (s->rtc.new.tm_hour > 23)
 587                 goto rtc_badness;
 588             tm.tm_hour = s->rtc.new.tm_hour;
 589             break;
 590         case 4:
 591             if (s->rtc.new.tm_mday < 1)
 592                 goto rtc_badness;
 593             /* TODO check range */
 594             tm.tm_mday = s->rtc.new.tm_mday;
 595             break;
 596         case 5:
 597             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 598                 goto rtc_badness;
 599             tm.tm_mon = s->rtc.new.tm_mon;
 600             break;
 601         case 6:
 602             tm.tm_year = s->rtc.new.tm_year;
 603             break;
 604         case 7:
 605             /* TODO set .tm_mday instead */
 606             tm.tm_wday = s->rtc.new.tm_wday;
 607             break;
 608         case 8:
 609             if (s->rtc.new.tm_hour > 23)
 610                 goto rtc_badness;
 611             if (s->rtc.new.tm_mday < 1)
 612                 goto rtc_badness;
 613             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 614                 goto rtc_badness;
 615             tm.tm_sec = s->rtc.new.tm_sec;
 616             tm.tm_min = s->rtc.new.tm_min;
 617             tm.tm_hour = s->rtc.new.tm_hour;
 618             tm.tm_mday = s->rtc.new.tm_mday;
 619             tm.tm_mon = s->rtc.new.tm_mon;
 620             tm.tm_year = s->rtc.new.tm_year;
 621             break;
 622         rtc_badness:
 623         default:
 624             fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
 625                             __FUNCTION__, value);
 626             s->status |= 1 << 10;                               /* RTCERR */
 627             menelaus_update(s);
 628         }
 629         s->rtc.sec_offset = qemu_timedate_diff(&tm);
 630         break;
 631     case MENELAUS_RTC_SEC:
 632         s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
 633         break;
 634     case MENELAUS_RTC_MIN:
 635         s->rtc.tm.tm_min = from_bcd(value & 0x7f);
 636         break;
 637     case MENELAUS_RTC_HR:
 638         s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?  /* MODE12_n24 */
 639                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 640                 from_bcd(value & 0x3f);
 641         break;
 642     case MENELAUS_RTC_DAY:
 643         s->rtc.tm.tm_mday = from_bcd(value);
 644         break;
 645     case MENELAUS_RTC_MON:
 646         s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
 647         break;
 648     case MENELAUS_RTC_YR:
 649         s->rtc.tm.tm_year = 2000 + from_bcd(value);
 650         break;
 651     case MENELAUS_RTC_WKDAY:
 652         s->rtc.tm.tm_mday = from_bcd(value);
 653         break;
 654     case MENELAUS_RTC_AL_SEC:
 655         s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
 656         menelaus_alm_update(s);
 657         break;
 658     case MENELAUS_RTC_AL_MIN:
 659         s->rtc.alm.tm_min = from_bcd(value & 0x7f);
 660         menelaus_alm_update(s);
 661         break;
 662     case MENELAUS_RTC_AL_HR:
 663         s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ? /* MODE12_n24 */
 664                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 665                 from_bcd(value & 0x3f);
 666         menelaus_alm_update(s);
 667         break;
 668     case MENELAUS_RTC_AL_DAY:
 669         s->rtc.alm.tm_mday = from_bcd(value);
 670         menelaus_alm_update(s);
 671         break;
 672     case MENELAUS_RTC_AL_MON:
 673         s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
 674         menelaus_alm_update(s);
 675         break;
 676     case MENELAUS_RTC_AL_YR:
 677         s->rtc.alm.tm_year = 2000 + from_bcd(value);
 678         menelaus_alm_update(s);
 679         break;
 680     case MENELAUS_RTC_COMP_MSB:
 681         s->rtc.comp &= 0xff;
 682         s->rtc.comp |= value << 8;
 683         break;
 684     case MENELAUS_RTC_COMP_LSB:
 685         s->rtc.comp &= 0xff << 8;
 686         s->rtc.comp |= value;
 687         break;
 688
 689     case MENELAUS_S1_PULL_EN:
 690         s->pull[0] = value;
 691         break;
 692     case MENELAUS_S1_PULL_DIR:
 693         s->pull[1] = value & 0x1f;
 694         break;
 695     case MENELAUS_S2_PULL_EN:
 696         s->pull[2] = value;
 697         break;
 698     case MENELAUS_S2_PULL_DIR:
 699         s->pull[3] = value & 0x1f;
 700         break;
 701
 702     case MENELAUS_MCT_CTRL1:
 703         s->mmc_ctrl[0] = value & 0x7f;
 704         break;
 705     case MENELAUS_MCT_CTRL2:
 706         s->mmc_ctrl[1] = value;
 707         /* TODO update Card Detect interrupts */
 708         break;
 709     case MENELAUS_MCT_CTRL3:
 710         s->mmc_ctrl[2] = value & 0xf;
 711         break;
 712     case MENELAUS_DEBOUNCE1:
 713         s->mmc_debounce = value & 0x3f;
 714         break;
 715
 716     default:
 717 #ifdef VERBOSE
 718         printf("%s: unknown register %02x\n", __FUNCTION__, addr);
 719 #endif
 720     }
 721 }
 722
 723 static void menelaus_event(i2c_slave *i2c, enum i2c_event event)
 724 {
 725     MenelausState *s = (MenelausState *) i2c;
 726
 727     if (event == I2C_START_SEND)
 728         s->firstbyte = 1;
 729 }
 730
 731 static int menelaus_tx(i2c_slave *i2c, uint8_t data)
 732 {
 733     MenelausState *s = (MenelausState *) i2c;
 734     /* Interpret register address byte */
 735     if (s->firstbyte) {
 736         s->reg = data;
 737         s->firstbyte = 0;
 738     } else
 739         menelaus_write(s, s->reg ++, data);
 740
 741     return 0;
 742 }
 743
 744 static int menelaus_rx(i2c_slave *i2c)
 745 {
 746     MenelausState *s = (MenelausState *) i2c;
 747
 748     return menelaus_read(s, s->reg ++);
 749 }
 750
 751 /* Save restore 32 bit int as uint16_t
 752    This is a Big hack, but it is how the old state did it.
 753    Or we broke compatibility in the state, or we can't use struct tm
 754  */
 755
 756 static int get_int32_as_uint16(QEMUFile *f, void *pv, size_t size)
 757 {
 758     int *v = pv;
 759     *v = qemu_get_be16(f);
 760     return 0;
 761 }
 762
 763 static void put_int32_as_uint16(QEMUFile *f, void *pv, size_t size)
 764 {
 765     int *v = pv;
 766     qemu_put_be16(f, *v);
 767 }
 768
 769 const VMStateInfo vmstate_hack_int32_as_uint16 = {
 770     .name = "int32_as_uint16",
 771     .get  = get_int32_as_uint16,
 772     .put  = put_int32_as_uint16,
 773 };
 774
 775 #define VMSTATE_UINT16_HACK(_f, _s)                                  \
 776     VMSTATE_SINGLE(_f, _s, 0, vmstate_hack_int32_as_uint16, int32_t)
 777
 778
 779 static const VMStateDescription vmstate_menelaus_tm = {
 780     .name = "menelaus_tm",
 781     .version_id = 0,
 782     .minimum_version_id = 0,
 783     .minimum_version_id_old = 0,
 784     .fields      = (VMStateField []) {
 785         VMSTATE_UINT16_HACK(tm_sec, struct tm),
 786         VMSTATE_UINT16_HACK(tm_min, struct tm),
 787         VMSTATE_UINT16_HACK(tm_hour, struct tm),
 788         VMSTATE_UINT16_HACK(tm_mday, struct tm),
 789         VMSTATE_UINT16_HACK(tm_min, struct tm),
 790         VMSTATE_UINT16_HACK(tm_year, struct tm),
 791         VMSTATE_END_OF_LIST()
 792     }
 793 };
 794
 795 static void menelaus_pre_save(void *opaque)
 796 {
 797     MenelausState *s = opaque;
 798     /* Should be <= 1000 */
 799     s->rtc_next_vmstate =  s->rtc.next - qemu_get_clock(rt_clock);
 800 }
 801
 802 static int menelaus_post_load(void *opaque, int version_id)
 803 {
 804     MenelausState *s = opaque;
 805
 806     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 807         menelaus_rtc_stop(s);
 808
 809     s->rtc.next = s->rtc_next_vmstate;
 810
 811     menelaus_alm_update(s);
 812     menelaus_update(s);
 813     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 814         menelaus_rtc_start(s);
 815     return 0;
 816 }
 817
 818 static const VMStateDescription vmstate_menelaus = {
 819     .name = "menelaus",
 820     .version_id = 0,
 821     .minimum_version_id = 0,
 822     .minimum_version_id_old = 0,
 823     .pre_save = menelaus_pre_save,
 824     .post_load = menelaus_post_load,
 825     .fields      = (VMStateField []) {
 826         VMSTATE_INT32(firstbyte, MenelausState),
 827         VMSTATE_UINT8(reg, MenelausState),
 828         VMSTATE_UINT8_ARRAY(vcore, MenelausState, 5),
 829         VMSTATE_UINT8_ARRAY(dcdc, MenelausState, 3),
 830         VMSTATE_UINT8_ARRAY(ldo, MenelausState, 8),
 831         VMSTATE_UINT8_ARRAY(sleep, MenelausState, 2),
 832         VMSTATE_UINT8(osc, MenelausState),
 833         VMSTATE_UINT8(detect, MenelausState),
 834         VMSTATE_UINT16(mask, MenelausState),
 835         VMSTATE_UINT16(status, MenelausState),
 836         VMSTATE_UINT8(dir, MenelausState),
 837         VMSTATE_UINT8(inputs, MenelausState),
 838         VMSTATE_UINT8(outputs, MenelausState),
 839         VMSTATE_UINT8(bbsms, MenelausState),
 840         VMSTATE_UINT8_ARRAY(pull, MenelausState, 4),
 841         VMSTATE_UINT8_ARRAY(mmc_ctrl, MenelausState, 3),
 842         VMSTATE_UINT8(mmc_debounce, MenelausState),
 843         VMSTATE_UINT8(rtc.ctrl, MenelausState),
 844         VMSTATE_UINT16(rtc.comp, MenelausState),
 845         VMSTATE_UINT16(rtc_next_vmstate, MenelausState),
 846         VMSTATE_STRUCT(rtc.new, MenelausState, 0, vmstate_menelaus_tm,
 847                        struct tm),
 848         VMSTATE_STRUCT(rtc.alm, MenelausState, 0, vmstate_menelaus_tm,
 849                        struct tm),
 850         VMSTATE_UINT8(pwrbtn_state, MenelausState),
 851         VMSTATE_I2C_SLAVE(i2c, MenelausState),
 852         VMSTATE_END_OF_LIST()
 853     }
 854 };
 855
 856 static int twl92230_init(i2c_slave *i2c)
 857 {
 858     MenelausState *s = FROM_I2C_SLAVE(MenelausState, i2c);
 859
 860     s->rtc.hz_tm = qemu_new_timer(rt_clock, menelaus_rtc_hz, s);
 861     /* Three output pins plus one interrupt pin.  */
 862     qdev_init_gpio_out(&i2c->qdev, s->out, 4);
 863     qdev_init_gpio_in(&i2c->qdev, menelaus_gpio_set, 3);
 864     s->pwrbtn = qemu_allocate_irqs(menelaus_pwrbtn_set, s, 1)[0];
 865
 866     menelaus_reset(&s->i2c);
 867
 868     vmstate_register(-1, &vmstate_menelaus, s);
 869     return 0;
 870 }
 871
 872 static I2CSlaveInfo twl92230_info = {
 873     .qdev.name ="twl92230",
 874     .qdev.size = sizeof(MenelausState),
 875     .init = twl92230_init,
 876     .event = menelaus_event,
 877     .recv = menelaus_rx,
 878     .send = menelaus_tx
 879 };
 880
 881 static void twl92230_register_devices(void)
 882 {
 883     i2c_register_slave(&twl92230_info);
 884 }
 885
 886 device_init(twl92230_register_devices)