hw/timer/twl92230.c

   1 /*
   2  * TI TWL92230C energy-management companion device for the OMAP24xx.
   3  * Aka. Menelaus (N4200 MENELAUS1_V2.2)
   4  *
   5  * Copyright (C) 2008 Nokia Corporation
   6  * Written by Andrzej Zaborowski <andrew@openedhand.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 or
  11  * (at your option) version 3 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "qemu/osdep.h"
  23 #include "hw/hw.h"
  24 #include "qemu/timer.h"
  25 #include "hw/i2c/i2c.h"
  26 #include "sysemu/sysemu.h"
  27 #include "ui/console.h"
  28 #include "qemu/bcd.h"
  29
  30 #define VERBOSE 1
  31
  32 #define TYPE_TWL92230 "twl92230"
  33 #define TWL92230(obj) OBJECT_CHECK(MenelausState, (obj), TYPE_TWL92230)
  34
  35 typedef struct MenelausState {
  36     I2CSlave parent_obj;
  37
  38     int firstbyte;
  39     uint8_t reg;
  40
  41     uint8_t vcore[5];
  42     uint8_t dcdc[3];
  43     uint8_t ldo[8];
  44     uint8_t sleep[2];
  45     uint8_t osc;
  46     uint8_t detect;
  47     uint16_t mask;
  48     uint16_t status;
  49     uint8_t dir;
  50     uint8_t inputs;
  51     uint8_t outputs;
  52     uint8_t bbsms;
  53     uint8_t pull[4];
  54     uint8_t mmc_ctrl[3];
  55     uint8_t mmc_debounce;
  56     struct {
  57         uint8_t ctrl;
  58         uint16_t comp;
  59         QEMUTimer *hz_tm;
  60         int64_t next;
  61         struct tm tm;
  62         struct tm new;
  63         struct tm alm;
  64         int sec_offset;
  65         int alm_sec;
  66         int next_comp;
  67     } rtc;
  68     uint16_t rtc_next_vmstate;
  69     qemu_irq out[4];
  70     uint8_t pwrbtn_state;
  71 } MenelausState;
  72
  73 static inline void menelaus_update(MenelausState *s)
  74 {
  75     qemu_set_irq(s->out[3], s->status & ~s->mask);
  76 }
  77
  78 static inline void menelaus_rtc_start(MenelausState *s)
  79 {
  80     s->rtc.next += qemu_clock_get_ms(rtc_clock);
  81     timer_mod(s->rtc.hz_tm, s->rtc.next);
  82 }
  83
  84 static inline void menelaus_rtc_stop(MenelausState *s)
  85 {
  86     timer_del(s->rtc.hz_tm);
  87     s->rtc.next -= qemu_clock_get_ms(rtc_clock);
  88     if (s->rtc.next < 1)
  89         s->rtc.next = 1;
  90 }
  91
  92 static void menelaus_rtc_update(MenelausState *s)
  93 {
  94     qemu_get_timedate(&s->rtc.tm, s->rtc.sec_offset);
  95 }
  96
  97 static void menelaus_alm_update(MenelausState *s)
  98 {
  99     if ((s->rtc.ctrl & 3) == 3)
 100         s->rtc.alm_sec = qemu_timedate_diff(&s->rtc.alm) - s->rtc.sec_offset;
 101 }
 102
 103 static void menelaus_rtc_hz(void *opaque)
 104 {
 105     MenelausState *s = (MenelausState *) opaque;
 106
 107     s->rtc.next_comp --;
 108     s->rtc.alm_sec --;
 109     s->rtc.next += 1000;
 110     timer_mod(s->rtc.hz_tm, s->rtc.next);
 111     if ((s->rtc.ctrl >> 3) & 3) {                               /* EVERY */
 112         menelaus_rtc_update(s);
 113         if (((s->rtc.ctrl >> 3) & 3) == 1 && !s->rtc.tm.tm_sec)
 114             s->status |= 1 << 8;                                /* RTCTMR */
 115         else if (((s->rtc.ctrl >> 3) & 3) == 2 && !s->rtc.tm.tm_min)
 116             s->status |= 1 << 8;                                /* RTCTMR */
 117         else if (!s->rtc.tm.tm_hour)
 118             s->status |= 1 << 8;                                /* RTCTMR */
 119     } else
 120         s->status |= 1 << 8;                                    /* RTCTMR */
 121     if ((s->rtc.ctrl >> 1) & 1) {                               /* RTC_AL_EN */
 122         if (s->rtc.alm_sec == 0)
 123             s->status |= 1 << 9;                                /* RTCALM */
 124         /* TODO: wake-up */
 125     }
 126     if (s->rtc.next_comp <= 0) {
 127         s->rtc.next -= muldiv64((int16_t) s->rtc.comp, 1000, 0x8000);
 128         s->rtc.next_comp = 3600;
 129     }
 130     menelaus_update(s);
 131 }
 132
 133 static void menelaus_reset(I2CSlave *i2c)
 134 {
 135     MenelausState *s = TWL92230(i2c);
 136
 137     s->reg = 0x00;
 138
 139     s->vcore[0] = 0x0c; /* XXX: X-loader needs 0x8c? check!  */
 140     s->vcore[1] = 0x05;
 141     s->vcore[2] = 0x02;
 142     s->vcore[3] = 0x0c;
 143     s->vcore[4] = 0x03;
 144     s->dcdc[0] = 0x33;  /* Depends on wiring */
 145     s->dcdc[1] = 0x03;
 146     s->dcdc[2] = 0x00;
 147     s->ldo[0] = 0x95;
 148     s->ldo[1] = 0x7e;
 149     s->ldo[2] = 0x00;
 150     s->ldo[3] = 0x00;   /* Depends on wiring */
 151     s->ldo[4] = 0x03;   /* Depends on wiring */
 152     s->ldo[5] = 0x00;
 153     s->ldo[6] = 0x00;
 154     s->ldo[7] = 0x00;
 155     s->sleep[0] = 0x00;
 156     s->sleep[1] = 0x00;
 157     s->osc = 0x01;
 158     s->detect = 0x09;
 159     s->mask = 0x0fff;
 160     s->status = 0;
 161     s->dir = 0x07;
 162     s->outputs = 0x00;
 163     s->bbsms = 0x00;
 164     s->pull[0] = 0x00;
 165     s->pull[1] = 0x00;
 166     s->pull[2] = 0x00;
 167     s->pull[3] = 0x00;
 168     s->mmc_ctrl[0] = 0x03;
 169     s->mmc_ctrl[1] = 0xc0;
 170     s->mmc_ctrl[2] = 0x00;
 171     s->mmc_debounce = 0x05;
 172
 173     if (s->rtc.ctrl & 1)
 174         menelaus_rtc_stop(s);
 175     s->rtc.ctrl = 0x00;
 176     s->rtc.comp = 0x0000;
 177     s->rtc.next = 1000;
 178     s->rtc.sec_offset = 0;
 179     s->rtc.next_comp = 1800;
 180     s->rtc.alm_sec = 1800;
 181     s->rtc.alm.tm_sec = 0x00;
 182     s->rtc.alm.tm_min = 0x00;
 183     s->rtc.alm.tm_hour = 0x00;
 184     s->rtc.alm.tm_mday = 0x01;
 185     s->rtc.alm.tm_mon = 0x00;
 186     s->rtc.alm.tm_year = 2004;
 187     menelaus_update(s);
 188 }
 189
 190 static void menelaus_gpio_set(void *opaque, int line, int level)
 191 {
 192     MenelausState *s = (MenelausState *) opaque;
 193
 194     if (line < 3) {
 195         /* No interrupt generated */
 196         s->inputs &= ~(1 << line);
 197         s->inputs |= level << line;
 198         return;
 199     }
 200
 201     if (!s->pwrbtn_state && level) {
 202         s->status |= 1 << 11;                                   /* PSHBTN */
 203         menelaus_update(s);
 204     }
 205     s->pwrbtn_state = level;
 206 }
 207
 208 #define MENELAUS_REV            0x01
 209 #define MENELAUS_VCORE_CTRL1    0x02
 210 #define MENELAUS_VCORE_CTRL2    0x03
 211 #define MENELAUS_VCORE_CTRL3    0x04
 212 #define MENELAUS_VCORE_CTRL4    0x05
 213 #define MENELAUS_VCORE_CTRL5    0x06
 214 #define MENELAUS_DCDC_CTRL1     0x07
 215 #define MENELAUS_DCDC_CTRL2     0x08
 216 #define MENELAUS_DCDC_CTRL3     0x09
 217 #define MENELAUS_LDO_CTRL1      0x0a
 218 #define MENELAUS_LDO_CTRL2      0x0b
 219 #define MENELAUS_LDO_CTRL3      0x0c
 220 #define MENELAUS_LDO_CTRL4      0x0d
 221 #define MENELAUS_LDO_CTRL5      0x0e
 222 #define MENELAUS_LDO_CTRL6      0x0f
 223 #define MENELAUS_LDO_CTRL7      0x10
 224 #define MENELAUS_LDO_CTRL8      0x11
 225 #define MENELAUS_SLEEP_CTRL1    0x12
 226 #define MENELAUS_SLEEP_CTRL2    0x13
 227 #define MENELAUS_DEVICE_OFF     0x14
 228 #define MENELAUS_OSC_CTRL       0x15
 229 #define MENELAUS_DETECT_CTRL    0x16
 230 #define MENELAUS_INT_MASK1      0x17
 231 #define MENELAUS_INT_MASK2      0x18
 232 #define MENELAUS_INT_STATUS1    0x19
 233 #define MENELAUS_INT_STATUS2    0x1a
 234 #define MENELAUS_INT_ACK1       0x1b
 235 #define MENELAUS_INT_ACK2       0x1c
 236 #define MENELAUS_GPIO_CTRL      0x1d
 237 #define MENELAUS_GPIO_IN        0x1e
 238 #define MENELAUS_GPIO_OUT       0x1f
 239 #define MENELAUS_BBSMS          0x20
 240 #define MENELAUS_RTC_CTRL       0x21
 241 #define MENELAUS_RTC_UPDATE     0x22
 242 #define MENELAUS_RTC_SEC        0x23
 243 #define MENELAUS_RTC_MIN        0x24
 244 #define MENELAUS_RTC_HR         0x25
 245 #define MENELAUS_RTC_DAY        0x26
 246 #define MENELAUS_RTC_MON        0x27
 247 #define MENELAUS_RTC_YR         0x28
 248 #define MENELAUS_RTC_WKDAY      0x29
 249 #define MENELAUS_RTC_AL_SEC     0x2a
 250 #define MENELAUS_RTC_AL_MIN     0x2b
 251 #define MENELAUS_RTC_AL_HR      0x2c
 252 #define MENELAUS_RTC_AL_DAY     0x2d
 253 #define MENELAUS_RTC_AL_MON     0x2e
 254 #define MENELAUS_RTC_AL_YR      0x2f
 255 #define MENELAUS_RTC_COMP_MSB   0x30
 256 #define MENELAUS_RTC_COMP_LSB   0x31
 257 #define MENELAUS_S1_PULL_EN     0x32
 258 #define MENELAUS_S1_PULL_DIR    0x33
 259 #define MENELAUS_S2_PULL_EN     0x34
 260 #define MENELAUS_S2_PULL_DIR    0x35
 261 #define MENELAUS_MCT_CTRL1      0x36
 262 #define MENELAUS_MCT_CTRL2      0x37
 263 #define MENELAUS_MCT_CTRL3      0x38
 264 #define MENELAUS_MCT_PIN_ST     0x39
 265 #define MENELAUS_DEBOUNCE1      0x3a
 266
 267 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 268 {
 269     MenelausState *s = (MenelausState *) opaque;
 270     int reg = 0;
 271
 272     switch (addr) {
 273     case MENELAUS_REV:
 274         return 0x22;
 275
 276     case MENELAUS_VCORE_CTRL5: reg ++;
 277     case MENELAUS_VCORE_CTRL4: reg ++;
 278     case MENELAUS_VCORE_CTRL3: reg ++;
 279     case MENELAUS_VCORE_CTRL2: reg ++;
 280     case MENELAUS_VCORE_CTRL1:
 281         return s->vcore[reg];
 282
 283     case MENELAUS_DCDC_CTRL3: reg ++;
 284     case MENELAUS_DCDC_CTRL2: reg ++;
 285     case MENELAUS_DCDC_CTRL1:
 286         return s->dcdc[reg];
 287
 288     case MENELAUS_LDO_CTRL8: reg ++;
 289     case MENELAUS_LDO_CTRL7: reg ++;
 290     case MENELAUS_LDO_CTRL6: reg ++;
 291     case MENELAUS_LDO_CTRL5: reg ++;
 292     case MENELAUS_LDO_CTRL4: reg ++;
 293     case MENELAUS_LDO_CTRL3: reg ++;
 294     case MENELAUS_LDO_CTRL2: reg ++;
 295     case MENELAUS_LDO_CTRL1:
 296         return s->ldo[reg];
 297
 298     case MENELAUS_SLEEP_CTRL2: reg ++;
 299     case MENELAUS_SLEEP_CTRL1:
 300         return s->sleep[reg];
 301
 302     case MENELAUS_DEVICE_OFF:
 303         return 0;
 304
 305     case MENELAUS_OSC_CTRL:
 306         return s->osc | (1 << 7);                       /* CLK32K_GOOD */
 307
 308     case MENELAUS_DETECT_CTRL:
 309         return s->detect;
 310
 311     case MENELAUS_INT_MASK1:
 312         return (s->mask >> 0) & 0xff;
 313     case MENELAUS_INT_MASK2:
 314         return (s->mask >> 8) & 0xff;
 315
 316     case MENELAUS_INT_STATUS1:
 317         return (s->status >> 0) & 0xff;
 318     case MENELAUS_INT_STATUS2:
 319         return (s->status >> 8) & 0xff;
 320
 321     case MENELAUS_INT_ACK1:
 322     case MENELAUS_INT_ACK2:
 323         return 0;
 324
 325     case MENELAUS_GPIO_CTRL:
 326         return s->dir;
 327     case MENELAUS_GPIO_IN:
 328         return s->inputs | (~s->dir & s->outputs);
 329     case MENELAUS_GPIO_OUT:
 330         return s->outputs;
 331
 332     case MENELAUS_BBSMS:
 333         return s->bbsms;
 334
 335     case MENELAUS_RTC_CTRL:
 336         return s->rtc.ctrl;
 337     case MENELAUS_RTC_UPDATE:
 338         return 0x00;
 339     case MENELAUS_RTC_SEC:
 340         menelaus_rtc_update(s);
 341         return to_bcd(s->rtc.tm.tm_sec);
 342     case MENELAUS_RTC_MIN:
 343         menelaus_rtc_update(s);
 344         return to_bcd(s->rtc.tm.tm_min);
 345     case MENELAUS_RTC_HR:
 346         menelaus_rtc_update(s);
 347         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 348             return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
 349                     (!!(s->rtc.tm.tm_hour >= 12) << 7); /* PM_nAM */
 350         else
 351             return to_bcd(s->rtc.tm.tm_hour);
 352     case MENELAUS_RTC_DAY:
 353         menelaus_rtc_update(s);
 354         return to_bcd(s->rtc.tm.tm_mday);
 355     case MENELAUS_RTC_MON:
 356         menelaus_rtc_update(s);
 357         return to_bcd(s->rtc.tm.tm_mon + 1);
 358     case MENELAUS_RTC_YR:
 359         menelaus_rtc_update(s);
 360         return to_bcd(s->rtc.tm.tm_year - 2000);
 361     case MENELAUS_RTC_WKDAY:
 362         menelaus_rtc_update(s);
 363         return to_bcd(s->rtc.tm.tm_wday);
 364     case MENELAUS_RTC_AL_SEC:
 365         return to_bcd(s->rtc.alm.tm_sec);
 366     case MENELAUS_RTC_AL_MIN:
 367         return to_bcd(s->rtc.alm.tm_min);
 368     case MENELAUS_RTC_AL_HR:
 369         if ((s->rtc.ctrl >> 2) & 1)                     /* MODE12_n24 */
 370             return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
 371                     (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
 372         else
 373             return to_bcd(s->rtc.alm.tm_hour);
 374     case MENELAUS_RTC_AL_DAY:
 375         return to_bcd(s->rtc.alm.tm_mday);
 376     case MENELAUS_RTC_AL_MON:
 377         return to_bcd(s->rtc.alm.tm_mon + 1);
 378     case MENELAUS_RTC_AL_YR:
 379         return to_bcd(s->rtc.alm.tm_year - 2000);
 380     case MENELAUS_RTC_COMP_MSB:
 381         return (s->rtc.comp >> 8) & 0xff;
 382     case MENELAUS_RTC_COMP_LSB:
 383         return (s->rtc.comp >> 0) & 0xff;
 384
 385     case MENELAUS_S1_PULL_EN:
 386         return s->pull[0];
 387     case MENELAUS_S1_PULL_DIR:
 388         return s->pull[1];
 389     case MENELAUS_S2_PULL_EN:
 390         return s->pull[2];
 391     case MENELAUS_S2_PULL_DIR:
 392         return s->pull[3];
 393
 394     case MENELAUS_MCT_CTRL3: reg ++;
 395     case MENELAUS_MCT_CTRL2: reg ++;
 396     case MENELAUS_MCT_CTRL1:
 397         return s->mmc_ctrl[reg];
 398     case MENELAUS_MCT_PIN_ST:
 399         /* TODO: return the real Card Detect */
 400         return 0;
 401     case MENELAUS_DEBOUNCE1:
 402         return s->mmc_debounce;
 403
 404     default:
 405 #ifdef VERBOSE
 406         printf("%s: unknown register %02x\n", __func__, addr);
 407 #endif
 408         break;
 409     }
 410     return 0;
 411 }
 412
 413 static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 414 {
 415     MenelausState *s = (MenelausState *) opaque;
 416     int line;
 417     int reg = 0;
 418     struct tm tm;
 419
 420     switch (addr) {
 421     case MENELAUS_VCORE_CTRL1:
 422         s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
 423         break;
 424     case MENELAUS_VCORE_CTRL2:
 425         s->vcore[1] = value;
 426         break;
 427     case MENELAUS_VCORE_CTRL3:
 428         s->vcore[2] = MIN(value & 0x1f, 0x12);
 429         break;
 430     case MENELAUS_VCORE_CTRL4:
 431         s->vcore[3] = MIN(value & 0x1f, 0x12);
 432         break;
 433     case MENELAUS_VCORE_CTRL5:
 434         s->vcore[4] = value & 3;
 435         /* XXX
 436          * auto set to 3 on M_Active, nRESWARM
 437          * auto set to 0 on M_WaitOn, M_Backup
 438          */
 439         break;
 440
 441     case MENELAUS_DCDC_CTRL1:
 442         s->dcdc[0] = value & 0x3f;
 443         break;
 444     case MENELAUS_DCDC_CTRL2:
 445         s->dcdc[1] = value & 0x07;
 446         /* XXX
 447          * auto set to 3 on M_Active, nRESWARM
 448          * auto set to 0 on M_WaitOn, M_Backup
 449          */
 450         break;
 451     case MENELAUS_DCDC_CTRL3:
 452         s->dcdc[2] = value & 0x07;
 453         break;
 454
 455     case MENELAUS_LDO_CTRL1:
 456         s->ldo[0] = value;
 457         break;
 458     case MENELAUS_LDO_CTRL2:
 459         s->ldo[1] = value & 0x7f;
 460         /* XXX
 461          * auto set to 0x7e on M_WaitOn, M_Backup
 462          */
 463         break;
 464     case MENELAUS_LDO_CTRL3:
 465         s->ldo[2] = 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_CTRL4:
 472         s->ldo[3] = 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_CTRL5:
 479         s->ldo[4] = value & 3;
 480         /* XXX
 481          * auto set to 3 on M_Active, nRESWARM
 482          * auto set to 0 on M_WaitOn, M_Backup
 483          */
 484         break;
 485     case MENELAUS_LDO_CTRL6:
 486         s->ldo[5] = value & 3;
 487         break;
 488     case MENELAUS_LDO_CTRL7:
 489         s->ldo[6] = value & 3;
 490         break;
 491     case MENELAUS_LDO_CTRL8:
 492         s->ldo[7] = value & 3;
 493         break;
 494
 495     case MENELAUS_SLEEP_CTRL2: reg ++;
 496     case MENELAUS_SLEEP_CTRL1:
 497         s->sleep[reg] = value;
 498         break;
 499
 500     case MENELAUS_DEVICE_OFF:
 501         if (value & 1) {
 502             menelaus_reset(I2C_SLAVE(s));
 503         }
 504         break;
 505
 506     case MENELAUS_OSC_CTRL:
 507         s->osc = value & 7;
 508         break;
 509
 510     case MENELAUS_DETECT_CTRL:
 511         s->detect = value & 0x7f;
 512         break;
 513
 514     case MENELAUS_INT_MASK1:
 515         s->mask &= 0xf00;
 516         s->mask |= value << 0;
 517         menelaus_update(s);
 518         break;
 519     case MENELAUS_INT_MASK2:
 520         s->mask &= 0x0ff;
 521         s->mask |= value << 8;
 522         menelaus_update(s);
 523         break;
 524
 525     case MENELAUS_INT_ACK1:
 526         s->status &= ~(((uint16_t) value) << 0);
 527         menelaus_update(s);
 528         break;
 529     case MENELAUS_INT_ACK2:
 530         s->status &= ~(((uint16_t) value) << 8);
 531         menelaus_update(s);
 532         break;
 533
 534     case MENELAUS_GPIO_CTRL:
 535         for (line = 0; line < 3; line ++) {
 536             if (((s->dir ^ value) >> line) & 1) {
 537                 qemu_set_irq(s->out[line],
 538                              ((s->outputs & ~s->dir) >> line) & 1);
 539             }
 540         }
 541         s->dir = value & 0x67;
 542         break;
 543     case MENELAUS_GPIO_OUT:
 544         for (line = 0; line < 3; line ++) {
 545             if ((((s->outputs ^ value) & ~s->dir) >> line) & 1) {
 546                 qemu_set_irq(s->out[line], (s->outputs >> line) & 1);
 547             }
 548         }
 549         s->outputs = value & 0x07;
 550         break;
 551
 552     case MENELAUS_BBSMS:
 553         s->bbsms = 0x0d;
 554         break;
 555
 556     case MENELAUS_RTC_CTRL:
 557         if ((s->rtc.ctrl ^ value) & 1) {                        /* RTC_EN */
 558             if (value & 1)
 559                 menelaus_rtc_start(s);
 560             else
 561                 menelaus_rtc_stop(s);
 562         }
 563         s->rtc.ctrl = value & 0x1f;
 564         menelaus_alm_update(s);
 565         break;
 566     case MENELAUS_RTC_UPDATE:
 567         menelaus_rtc_update(s);
 568         memcpy(&tm, &s->rtc.tm, sizeof(tm));
 569         switch (value & 0xf) {
 570         case 0:
 571             break;
 572         case 1:
 573             tm.tm_sec = s->rtc.new.tm_sec;
 574             break;
 575         case 2:
 576             tm.tm_min = s->rtc.new.tm_min;
 577             break;
 578         case 3:
 579             if (s->rtc.new.tm_hour > 23)
 580                 goto rtc_badness;
 581             tm.tm_hour = s->rtc.new.tm_hour;
 582             break;
 583         case 4:
 584             if (s->rtc.new.tm_mday < 1)
 585                 goto rtc_badness;
 586             /* TODO check range */
 587             tm.tm_mday = s->rtc.new.tm_mday;
 588             break;
 589         case 5:
 590             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 591                 goto rtc_badness;
 592             tm.tm_mon = s->rtc.new.tm_mon;
 593             break;
 594         case 6:
 595             tm.tm_year = s->rtc.new.tm_year;
 596             break;
 597         case 7:
 598             /* TODO set .tm_mday instead */
 599             tm.tm_wday = s->rtc.new.tm_wday;
 600             break;
 601         case 8:
 602             if (s->rtc.new.tm_hour > 23)
 603                 goto rtc_badness;
 604             if (s->rtc.new.tm_mday < 1)
 605                 goto rtc_badness;
 606             if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
 607                 goto rtc_badness;
 608             tm.tm_sec = s->rtc.new.tm_sec;
 609             tm.tm_min = s->rtc.new.tm_min;
 610             tm.tm_hour = s->rtc.new.tm_hour;
 611             tm.tm_mday = s->rtc.new.tm_mday;
 612             tm.tm_mon = s->rtc.new.tm_mon;
 613             tm.tm_year = s->rtc.new.tm_year;
 614             break;
 615         rtc_badness:
 616         default:
 617             fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
 618                             __func__, value);
 619             s->status |= 1 << 10;                               /* RTCERR */
 620             menelaus_update(s);
 621         }
 622         s->rtc.sec_offset = qemu_timedate_diff(&tm);
 623         break;
 624     case MENELAUS_RTC_SEC:
 625         s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
 626         break;
 627     case MENELAUS_RTC_MIN:
 628         s->rtc.tm.tm_min = from_bcd(value & 0x7f);
 629         break;
 630     case MENELAUS_RTC_HR:
 631         s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?  /* MODE12_n24 */
 632                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 633                 from_bcd(value & 0x3f);
 634         break;
 635     case MENELAUS_RTC_DAY:
 636         s->rtc.tm.tm_mday = from_bcd(value);
 637         break;
 638     case MENELAUS_RTC_MON:
 639         s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
 640         break;
 641     case MENELAUS_RTC_YR:
 642         s->rtc.tm.tm_year = 2000 + from_bcd(value);
 643         break;
 644     case MENELAUS_RTC_WKDAY:
 645         s->rtc.tm.tm_mday = from_bcd(value);
 646         break;
 647     case MENELAUS_RTC_AL_SEC:
 648         s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
 649         menelaus_alm_update(s);
 650         break;
 651     case MENELAUS_RTC_AL_MIN:
 652         s->rtc.alm.tm_min = from_bcd(value & 0x7f);
 653         menelaus_alm_update(s);
 654         break;
 655     case MENELAUS_RTC_AL_HR:
 656         s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ? /* MODE12_n24 */
 657                 MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
 658                 from_bcd(value & 0x3f);
 659         menelaus_alm_update(s);
 660         break;
 661     case MENELAUS_RTC_AL_DAY:
 662         s->rtc.alm.tm_mday = from_bcd(value);
 663         menelaus_alm_update(s);
 664         break;
 665     case MENELAUS_RTC_AL_MON:
 666         s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
 667         menelaus_alm_update(s);
 668         break;
 669     case MENELAUS_RTC_AL_YR:
 670         s->rtc.alm.tm_year = 2000 + from_bcd(value);
 671         menelaus_alm_update(s);
 672         break;
 673     case MENELAUS_RTC_COMP_MSB:
 674         s->rtc.comp &= 0xff;
 675         s->rtc.comp |= value << 8;
 676         break;
 677     case MENELAUS_RTC_COMP_LSB:
 678         s->rtc.comp &= 0xff << 8;
 679         s->rtc.comp |= value;
 680         break;
 681
 682     case MENELAUS_S1_PULL_EN:
 683         s->pull[0] = value;
 684         break;
 685     case MENELAUS_S1_PULL_DIR:
 686         s->pull[1] = value & 0x1f;
 687         break;
 688     case MENELAUS_S2_PULL_EN:
 689         s->pull[2] = value;
 690         break;
 691     case MENELAUS_S2_PULL_DIR:
 692         s->pull[3] = value & 0x1f;
 693         break;
 694
 695     case MENELAUS_MCT_CTRL1:
 696         s->mmc_ctrl[0] = value & 0x7f;
 697         break;
 698     case MENELAUS_MCT_CTRL2:
 699         s->mmc_ctrl[1] = value;
 700         /* TODO update Card Detect interrupts */
 701         break;
 702     case MENELAUS_MCT_CTRL3:
 703         s->mmc_ctrl[2] = value & 0xf;
 704         break;
 705     case MENELAUS_DEBOUNCE1:
 706         s->mmc_debounce = value & 0x3f;
 707         break;
 708
 709     default:
 710 #ifdef VERBOSE
 711         printf("%s: unknown register %02x\n", __func__, addr);
 712 #endif
 713     }
 714 }
 715
 716 static int menelaus_event(I2CSlave *i2c, enum i2c_event event)
 717 {
 718     MenelausState *s = TWL92230(i2c);
 719
 720     if (event == I2C_START_SEND)
 721         s->firstbyte = 1;
 722
 723     return 0;
 724 }
 725
 726 static int menelaus_tx(I2CSlave *i2c, uint8_t data)
 727 {
 728     MenelausState *s = TWL92230(i2c);
 729
 730     /* Interpret register address byte */
 731     if (s->firstbyte) {
 732         s->reg = data;
 733         s->firstbyte = 0;
 734     } else
 735         menelaus_write(s, s->reg ++, data);
 736
 737     return 0;
 738 }
 739
 740 static uint8_t menelaus_rx(I2CSlave *i2c)
 741 {
 742     MenelausState *s = TWL92230(i2c);
 743
 744     return menelaus_read(s, s->reg ++);
 745 }
 746
 747 /* Save restore 32 bit int as uint16_t
 748    This is a Big hack, but it is how the old state did it.
 749    Or we broke compatibility in the state, or we can't use struct tm
 750  */
 751
 752 static int get_int32_as_uint16(QEMUFile *f, void *pv, size_t size,
 753                                const VMStateField *field)
 754 {
 755     int *v = pv;
 756     *v = qemu_get_be16(f);
 757     return 0;
 758 }
 759
 760 static int put_int32_as_uint16(QEMUFile *f, void *pv, size_t size,
 761                                const VMStateField *field, QJSON *vmdesc)
 762 {
 763     int *v = pv;
 764     qemu_put_be16(f, *v);
 765
 766     return 0;
 767 }
 768
 769 static 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     .fields = (VMStateField[]) {
 784         VMSTATE_UINT16_HACK(tm_sec, struct tm),
 785         VMSTATE_UINT16_HACK(tm_min, struct tm),
 786         VMSTATE_UINT16_HACK(tm_hour, struct tm),
 787         VMSTATE_UINT16_HACK(tm_mday, struct tm),
 788         VMSTATE_UINT16_HACK(tm_min, struct tm),
 789         VMSTATE_UINT16_HACK(tm_year, struct tm),
 790         VMSTATE_END_OF_LIST()
 791     }
 792 };
 793
 794 static int menelaus_pre_save(void *opaque)
 795 {
 796     MenelausState *s = opaque;
 797     /* Should be <= 1000 */
 798     s->rtc_next_vmstate =  s->rtc.next - qemu_clock_get_ms(rtc_clock);
 799
 800     return 0;
 801 }
 802
 803 static int menelaus_post_load(void *opaque, int version_id)
 804 {
 805     MenelausState *s = opaque;
 806
 807     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 808         menelaus_rtc_stop(s);
 809
 810     s->rtc.next = s->rtc_next_vmstate;
 811
 812     menelaus_alm_update(s);
 813     menelaus_update(s);
 814     if (s->rtc.ctrl & 1)                                        /* RTC_EN */
 815         menelaus_rtc_start(s);
 816     return 0;
 817 }
 818
 819 static const VMStateDescription vmstate_menelaus = {
 820     .name = "menelaus",
 821     .version_id = 0,
 822     .minimum_version_id = 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(parent_obj, MenelausState),
 852         VMSTATE_END_OF_LIST()
 853     }
 854 };
 855
 856 static void twl92230_realize(DeviceState *dev, Error **errp)
 857 {
 858     MenelausState *s = TWL92230(dev);
 859
 860     s->rtc.hz_tm = timer_new_ms(rtc_clock, menelaus_rtc_hz, s);
 861     /* Three output pins plus one interrupt pin.  */
 862     qdev_init_gpio_out(dev, s->out, 4);
 863
 864     /* Three input pins plus one power-button pin.  */
 865     qdev_init_gpio_in(dev, menelaus_gpio_set, 4);
 866
 867     menelaus_reset(I2C_SLAVE(dev));
 868 }
 869
 870 static void twl92230_class_init(ObjectClass *klass, void *data)
 871 {
 872     DeviceClass *dc = DEVICE_CLASS(klass);
 873     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 874
 875     dc->realize = twl92230_realize;
 876     sc->event = menelaus_event;
 877     sc->recv = menelaus_rx;
 878     sc->send = menelaus_tx;
 879     dc->vmsd = &vmstate_menelaus;
 880 }
 881
 882 static const TypeInfo twl92230_info = {
 883     .name          = TYPE_TWL92230,
 884     .parent        = TYPE_I2C_SLAVE,
 885     .instance_size = sizeof(MenelausState),
 886     .class_init    = twl92230_class_init,
 887 };
 888
 889 static void twl92230_register_types(void)
 890 {
 891     type_register_static(&twl92230_info);
 892 }
 893
 894 type_init(twl92230_register_types)