symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/twl92230.c
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority

/*
 * TI TWL92230C energy-management companion device for the OMAP24xx.
 * Aka. Menelaus (N4200 MENELAUS1_V2.2)
 *
 * Copyright (C) 2008 Nokia Corporation
 * Written by Andrzej Zaborowski <andrew@openedhand.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 or
 * (at your option) version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include "hw.h"
#include "qemu-timer.h"
#include "i2c.h"
#include "sysemu.h"
#include "console.h"

#define VERBOSE 1

struct menelaus_s {
    i2c_slave i2c;
    qemu_irq irq;

    int firstbyte;
    uint8_t reg;

    uint8_t vcore[5];
    uint8_t dcdc[3];
    uint8_t ldo[8];
    uint8_t sleep[2];
    uint8_t osc;
    uint8_t detect;
    uint16_t mask;
    uint16_t status;
    uint8_t dir;
    uint8_t inputs;
    uint8_t outputs;
    uint8_t bbsms;
    uint8_t pull[4];
    uint8_t mmc_ctrl[3];
    uint8_t mmc_debounce;
    struct {
        uint8_t ctrl;
        uint16_t comp;
        QEMUTimer *hz_tm;
        int64_t next;
        struct tm tm;
        struct tm new;
        struct tm alm;
        int sec_offset;
        int alm_sec;
        int next_comp;
    } rtc;
    qemu_irq handler[3];
    qemu_irq *in;
    int pwrbtn_state;
    qemu_irq pwrbtn;
};

static inline void menelaus_update(struct menelaus_s *s)
{
    qemu_set_irq(s->irq, s->status & ~s->mask);
}

static inline void menelaus_rtc_start(struct menelaus_s *s)
{
    s->rtc.next =+ qemu_get_clock(rt_clock);
    qemu_mod_timer(s->rtc.hz_tm, s->rtc.next);
}

static inline void menelaus_rtc_stop(struct menelaus_s *s)
{
    qemu_del_timer(s->rtc.hz_tm);
    s->rtc.next =- qemu_get_clock(rt_clock);
    if (s->rtc.next < 1)
        s->rtc.next = 1;
}

static void menelaus_rtc_update(struct menelaus_s *s)
{
    qemu_get_timedate(&s->rtc.tm, s->rtc.sec_offset);
}

static void menelaus_alm_update(struct menelaus_s *s)
{
    if ((s->rtc.ctrl & 3) == 3)
        s->rtc.alm_sec = qemu_timedate_diff(&s->rtc.alm) - s->rtc.sec_offset;
}

static void menelaus_rtc_hz(void *opaque)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;

    s->rtc.next_comp --;
    s->rtc.alm_sec --;
    s->rtc.next += 1000;
    qemu_mod_timer(s->rtc.hz_tm, s->rtc.next);
    if ((s->rtc.ctrl >> 3) & 3) {				/* EVERY */
        menelaus_rtc_update(s);
        if (((s->rtc.ctrl >> 3) & 3) == 1 && !s->rtc.tm.tm_sec)
            s->status |= 1 << 8;				/* RTCTMR */
        else if (((s->rtc.ctrl >> 3) & 3) == 2 && !s->rtc.tm.tm_min)
            s->status |= 1 << 8;				/* RTCTMR */
        else if (!s->rtc.tm.tm_hour)
            s->status |= 1 << 8;				/* RTCTMR */
    } else
        s->status |= 1 << 8;					/* RTCTMR */
    if ((s->rtc.ctrl >> 1) & 1) {				/* RTC_AL_EN */
        if (s->rtc.alm_sec == 0)
            s->status |= 1 << 9;				/* RTCALM */
        /* TODO: wake-up */
    }
    if (s->rtc.next_comp <= 0) {
        s->rtc.next -= muldiv64((int16_t) s->rtc.comp, 1000, 0x8000);
        s->rtc.next_comp = 3600;
    }
    menelaus_update(s);
}

static void menelaus_reset(i2c_slave *i2c)
{
    struct menelaus_s *s = (struct menelaus_s *) i2c;
    s->reg = 0x00;

    s->vcore[0] = 0x0c;	/* XXX: X-loader needs 0x8c? check!  */
    s->vcore[1] = 0x05;
    s->vcore[2] = 0x02;
    s->vcore[3] = 0x0c;
    s->vcore[4] = 0x03;
    s->dcdc[0] = 0x33;	/* Depends on wiring */
    s->dcdc[1] = 0x03;
    s->dcdc[2] = 0x00;
    s->ldo[0] = 0x95;
    s->ldo[1] = 0x7e;
    s->ldo[2] = 0x00;
    s->ldo[3] = 0x00;	/* Depends on wiring */
    s->ldo[4] = 0x03;	/* Depends on wiring */
    s->ldo[5] = 0x00;
    s->ldo[6] = 0x00;
    s->ldo[7] = 0x00;
    s->sleep[0] = 0x00;
    s->sleep[1] = 0x00;
    s->osc = 0x01;
    s->detect = 0x09;
    s->mask = 0x0fff;
    s->status = 0;
    s->dir = 0x07;
    s->outputs = 0x00;
    s->bbsms = 0x00;
    s->pull[0] = 0x00;
    s->pull[1] = 0x00;
    s->pull[2] = 0x00;
    s->pull[3] = 0x00;
    s->mmc_ctrl[0] = 0x03;
    s->mmc_ctrl[1] = 0xc0;
    s->mmc_ctrl[2] = 0x00;
    s->mmc_debounce = 0x05;

    if (s->rtc.ctrl & 1)
        menelaus_rtc_stop(s);
    s->rtc.ctrl = 0x00;
    s->rtc.comp = 0x0000;
    s->rtc.next = 1000;
    s->rtc.sec_offset = 0;
    s->rtc.next_comp = 1800;
    s->rtc.alm_sec = 1800;
    s->rtc.alm.tm_sec = 0x00;
    s->rtc.alm.tm_min = 0x00;
    s->rtc.alm.tm_hour = 0x00;
    s->rtc.alm.tm_mday = 0x01;
    s->rtc.alm.tm_mon = 0x00;
    s->rtc.alm.tm_year = 2004;
    menelaus_update(s);
}

static inline uint8_t to_bcd(int val)
{
    return ((val / 10) << 4) | (val % 10);
}

static inline int from_bcd(uint8_t val)
{
    return ((val >> 4) * 10) + (val & 0x0f);
}

static void menelaus_gpio_set(void *opaque, int line, int level)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;

    /* No interrupt generated */
    s->inputs &= ~(1 << line);
    s->inputs |= level << line;
}

static void menelaus_pwrbtn_set(void *opaque, int line, int level)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;

    if (!s->pwrbtn_state && level) {
        s->status |= 1 << 11;					/* PSHBTN */
        menelaus_update(s);
    }
    s->pwrbtn_state = level;
}

#define MENELAUS_REV		0x01
#define MENELAUS_VCORE_CTRL1	0x02
#define MENELAUS_VCORE_CTRL2	0x03
#define MENELAUS_VCORE_CTRL3	0x04
#define MENELAUS_VCORE_CTRL4	0x05
#define MENELAUS_VCORE_CTRL5	0x06
#define MENELAUS_DCDC_CTRL1	0x07
#define MENELAUS_DCDC_CTRL2	0x08
#define MENELAUS_DCDC_CTRL3	0x09
#define MENELAUS_LDO_CTRL1	0x0a
#define MENELAUS_LDO_CTRL2	0x0b
#define MENELAUS_LDO_CTRL3	0x0c
#define MENELAUS_LDO_CTRL4	0x0d
#define MENELAUS_LDO_CTRL5	0x0e
#define MENELAUS_LDO_CTRL6	0x0f
#define MENELAUS_LDO_CTRL7	0x10
#define MENELAUS_LDO_CTRL8	0x11
#define MENELAUS_SLEEP_CTRL1	0x12
#define MENELAUS_SLEEP_CTRL2	0x13
#define MENELAUS_DEVICE_OFF	0x14
#define MENELAUS_OSC_CTRL	0x15
#define MENELAUS_DETECT_CTRL	0x16
#define MENELAUS_INT_MASK1	0x17
#define MENELAUS_INT_MASK2	0x18
#define MENELAUS_INT_STATUS1	0x19
#define MENELAUS_INT_STATUS2	0x1a
#define MENELAUS_INT_ACK1	0x1b
#define MENELAUS_INT_ACK2	0x1c
#define MENELAUS_GPIO_CTRL	0x1d
#define MENELAUS_GPIO_IN	0x1e
#define MENELAUS_GPIO_OUT	0x1f
#define MENELAUS_BBSMS		0x20
#define MENELAUS_RTC_CTRL	0x21
#define MENELAUS_RTC_UPDATE	0x22
#define MENELAUS_RTC_SEC	0x23
#define MENELAUS_RTC_MIN	0x24
#define MENELAUS_RTC_HR		0x25
#define MENELAUS_RTC_DAY	0x26
#define MENELAUS_RTC_MON	0x27
#define MENELAUS_RTC_YR		0x28
#define MENELAUS_RTC_WKDAY	0x29
#define MENELAUS_RTC_AL_SEC	0x2a
#define MENELAUS_RTC_AL_MIN	0x2b
#define MENELAUS_RTC_AL_HR	0x2c
#define MENELAUS_RTC_AL_DAY	0x2d
#define MENELAUS_RTC_AL_MON	0x2e
#define MENELAUS_RTC_AL_YR	0x2f
#define MENELAUS_RTC_COMP_MSB	0x30
#define MENELAUS_RTC_COMP_LSB	0x31
#define MENELAUS_S1_PULL_EN	0x32
#define MENELAUS_S1_PULL_DIR	0x33
#define MENELAUS_S2_PULL_EN	0x34
#define MENELAUS_S2_PULL_DIR	0x35
#define MENELAUS_MCT_CTRL1	0x36
#define MENELAUS_MCT_CTRL2	0x37
#define MENELAUS_MCT_CTRL3	0x38
#define MENELAUS_MCT_PIN_ST	0x39
#define MENELAUS_DEBOUNCE1	0x3a

static uint8_t menelaus_read(void *opaque, uint8_t addr)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;
    int reg = 0;

    switch (addr) {
    case MENELAUS_REV:
        return 0x22;

    case MENELAUS_VCORE_CTRL5: reg ++;
    case MENELAUS_VCORE_CTRL4: reg ++;
    case MENELAUS_VCORE_CTRL3: reg ++;
    case MENELAUS_VCORE_CTRL2: reg ++;
    case MENELAUS_VCORE_CTRL1:
        return s->vcore[reg];

    case MENELAUS_DCDC_CTRL3: reg ++;
    case MENELAUS_DCDC_CTRL2: reg ++;
    case MENELAUS_DCDC_CTRL1:
        return s->dcdc[reg];

    case MENELAUS_LDO_CTRL8: reg ++;
    case MENELAUS_LDO_CTRL7: reg ++;
    case MENELAUS_LDO_CTRL6: reg ++;
    case MENELAUS_LDO_CTRL5: reg ++;
    case MENELAUS_LDO_CTRL4: reg ++;
    case MENELAUS_LDO_CTRL3: reg ++;
    case MENELAUS_LDO_CTRL2: reg ++;
    case MENELAUS_LDO_CTRL1:
        return s->ldo[reg];

    case MENELAUS_SLEEP_CTRL2: reg ++;
    case MENELAUS_SLEEP_CTRL1:
        return s->sleep[reg];

    case MENELAUS_DEVICE_OFF:
        return 0;

    case MENELAUS_OSC_CTRL:
        return s->osc | (1 << 7);			/* CLK32K_GOOD */

    case MENELAUS_DETECT_CTRL:
        return s->detect;

    case MENELAUS_INT_MASK1:
        return (s->mask >> 0) & 0xff;
    case MENELAUS_INT_MASK2:
        return (s->mask >> 8) & 0xff;

    case MENELAUS_INT_STATUS1:
        return (s->status >> 0) & 0xff;
    case MENELAUS_INT_STATUS2:
        return (s->status >> 8) & 0xff;

    case MENELAUS_INT_ACK1:
    case MENELAUS_INT_ACK2:
        return 0;

    case MENELAUS_GPIO_CTRL:
        return s->dir;
    case MENELAUS_GPIO_IN:
        return s->inputs | (~s->dir & s->outputs);
    case MENELAUS_GPIO_OUT:
        return s->outputs;

    case MENELAUS_BBSMS:
        return s->bbsms;

    case MENELAUS_RTC_CTRL:
        return s->rtc.ctrl;
    case MENELAUS_RTC_UPDATE:
        return 0x00;
    case MENELAUS_RTC_SEC:
        menelaus_rtc_update(s);
        return to_bcd(s->rtc.tm.tm_sec);
    case MENELAUS_RTC_MIN:
        menelaus_rtc_update(s);
        return to_bcd(s->rtc.tm.tm_min);
    case MENELAUS_RTC_HR:
        menelaus_rtc_update(s);
        if ((s->rtc.ctrl >> 2) & 1)			/* MODE12_n24 */
            return to_bcd((s->rtc.tm.tm_hour % 12) + 1) |
                    (!!(s->rtc.tm.tm_hour >= 12) << 7);	/* PM_nAM */
        else
            return to_bcd(s->rtc.tm.tm_hour);
    case MENELAUS_RTC_DAY:
        menelaus_rtc_update(s);
        return to_bcd(s->rtc.tm.tm_mday);
    case MENELAUS_RTC_MON:
        menelaus_rtc_update(s);
        return to_bcd(s->rtc.tm.tm_mon + 1);
    case MENELAUS_RTC_YR:
        menelaus_rtc_update(s);
        return to_bcd(s->rtc.tm.tm_year - 2000);
    case MENELAUS_RTC_WKDAY:
        menelaus_rtc_update(s);
        return to_bcd(s->rtc.tm.tm_wday);
    case MENELAUS_RTC_AL_SEC:
        return to_bcd(s->rtc.alm.tm_sec);
    case MENELAUS_RTC_AL_MIN:
        return to_bcd(s->rtc.alm.tm_min);
    case MENELAUS_RTC_AL_HR:
        if ((s->rtc.ctrl >> 2) & 1)			/* MODE12_n24 */
            return to_bcd((s->rtc.alm.tm_hour % 12) + 1) |
                    (!!(s->rtc.alm.tm_hour >= 12) << 7);/* AL_PM_nAM */
        else
            return to_bcd(s->rtc.alm.tm_hour);
    case MENELAUS_RTC_AL_DAY:
        return to_bcd(s->rtc.alm.tm_mday);
    case MENELAUS_RTC_AL_MON:
        return to_bcd(s->rtc.alm.tm_mon + 1);
    case MENELAUS_RTC_AL_YR:
        return to_bcd(s->rtc.alm.tm_year - 2000);
    case MENELAUS_RTC_COMP_MSB:
        return (s->rtc.comp >> 8) & 0xff;
    case MENELAUS_RTC_COMP_LSB:
        return (s->rtc.comp >> 0) & 0xff;

    case MENELAUS_S1_PULL_EN:
        return s->pull[0];
    case MENELAUS_S1_PULL_DIR:
        return s->pull[1];
    case MENELAUS_S2_PULL_EN:
        return s->pull[2];
    case MENELAUS_S2_PULL_DIR:
        return s->pull[3];

    case MENELAUS_MCT_CTRL3: reg ++;
    case MENELAUS_MCT_CTRL2: reg ++;
    case MENELAUS_MCT_CTRL1:
        return s->mmc_ctrl[reg];
    case MENELAUS_MCT_PIN_ST:
        /* TODO: return the real Card Detect */
        return 0;
    case MENELAUS_DEBOUNCE1:
        return s->mmc_debounce;

    default:
#ifdef VERBOSE
        printf("%s: unknown register %02x\n", __FUNCTION__, addr);
#endif
        break;
    }
    return 0;
}

static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;
    int line;
    int reg = 0;
    struct tm tm;

    switch (addr) {
    case MENELAUS_VCORE_CTRL1:
        s->vcore[0] = (value & 0xe) | MIN(value & 0x1f, 0x12);
        break;
    case MENELAUS_VCORE_CTRL2:
        s->vcore[1] = value;
        break;
    case MENELAUS_VCORE_CTRL3:
        s->vcore[2] = MIN(value & 0x1f, 0x12);
        break;
    case MENELAUS_VCORE_CTRL4:
        s->vcore[3] = MIN(value & 0x1f, 0x12);
        break;
    case MENELAUS_VCORE_CTRL5:
        s->vcore[4] = value & 3;
        /* XXX
         * auto set to 3 on M_Active, nRESWARM
         * auto set to 0 on M_WaitOn, M_Backup
         */
        break;

    case MENELAUS_DCDC_CTRL1:
        s->dcdc[0] = value & 0x3f;
        break;
    case MENELAUS_DCDC_CTRL2:
        s->dcdc[1] = value & 0x07;
        /* XXX
         * auto set to 3 on M_Active, nRESWARM
         * auto set to 0 on M_WaitOn, M_Backup
         */
        break;
    case MENELAUS_DCDC_CTRL3:
        s->dcdc[2] = value & 0x07;
        break;

    case MENELAUS_LDO_CTRL1:
        s->ldo[0] = value;
        break;
    case MENELAUS_LDO_CTRL2:
        s->ldo[1] = value & 0x7f;
        /* XXX
         * auto set to 0x7e on M_WaitOn, M_Backup
         */
        break;
    case MENELAUS_LDO_CTRL3:
        s->ldo[2] = value & 3;
        /* XXX
         * auto set to 3 on M_Active, nRESWARM
         * auto set to 0 on M_WaitOn, M_Backup
         */
        break;
    case MENELAUS_LDO_CTRL4:
        s->ldo[3] = value & 3;
        /* XXX
         * auto set to 3 on M_Active, nRESWARM
         * auto set to 0 on M_WaitOn, M_Backup
         */
        break;
    case MENELAUS_LDO_CTRL5:
        s->ldo[4] = value & 3;
        /* XXX
         * auto set to 3 on M_Active, nRESWARM
         * auto set to 0 on M_WaitOn, M_Backup
         */
        break;
    case MENELAUS_LDO_CTRL6:
        s->ldo[5] = value & 3;
        break;
    case MENELAUS_LDO_CTRL7:
        s->ldo[6] = value & 3;
        break;
    case MENELAUS_LDO_CTRL8:
        s->ldo[7] = value & 3;
        break;

    case MENELAUS_SLEEP_CTRL2: reg ++;
    case MENELAUS_SLEEP_CTRL1:
        s->sleep[reg] = value;
        break;

    case MENELAUS_DEVICE_OFF:
        if (value & 1)
            menelaus_reset(&s->i2c);
        break;

    case MENELAUS_OSC_CTRL:
        s->osc = value & 7;
        break;

    case MENELAUS_DETECT_CTRL:
        s->detect = value & 0x7f;
        break;

    case MENELAUS_INT_MASK1:
        s->mask &= 0xf00;
        s->mask |= value << 0;
        menelaus_update(s);
        break;
    case MENELAUS_INT_MASK2:
        s->mask &= 0x0ff;
        s->mask |= value << 8;
        menelaus_update(s);
        break;

    case MENELAUS_INT_ACK1:
        s->status &= ~(((uint16_t) value) << 0);
        menelaus_update(s);
        break;
    case MENELAUS_INT_ACK2:
        s->status &= ~(((uint16_t) value) << 8);
        menelaus_update(s);
        break;

    case MENELAUS_GPIO_CTRL:
        for (line = 0; line < 3; line ++)
            if (((s->dir ^ value) >> line) & 1)
                if (s->handler[line])
                    qemu_set_irq(s->handler[line],
                                    ((s->outputs & ~s->dir) >> line) & 1);
        s->dir = value & 0x67;
        break;
    case MENELAUS_GPIO_OUT:
        for (line = 0; line < 3; line ++)
            if ((((s->outputs ^ value) & ~s->dir) >> line) & 1)
                if (s->handler[line])
                    qemu_set_irq(s->handler[line], (s->outputs >> line) & 1);
        s->outputs = value & 0x07;
        break;

    case MENELAUS_BBSMS:
        s->bbsms = 0x0d;
        break;

    case MENELAUS_RTC_CTRL:
        if ((s->rtc.ctrl ^ value) & 1) {			/* RTC_EN */
            if (value & 1)
                menelaus_rtc_start(s);
            else
                menelaus_rtc_stop(s);
        }
        s->rtc.ctrl = value & 0x1f;
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_UPDATE:
        menelaus_rtc_update(s);
        memcpy(&tm, &s->rtc.tm, sizeof(tm));
        switch (value & 0xf) {
        case 0:
            break;
        case 1:
            tm.tm_sec = s->rtc.new.tm_sec;
            break;
        case 2:
            tm.tm_min = s->rtc.new.tm_min;
            break;
        case 3:
            if (s->rtc.new.tm_hour > 23)
                goto rtc_badness;
            tm.tm_hour = s->rtc.new.tm_hour;
            break;
        case 4:
            if (s->rtc.new.tm_mday < 1)
                goto rtc_badness;
            /* TODO check range */
            tm.tm_mday = s->rtc.new.tm_mday;
            break;
        case 5:
            if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
                goto rtc_badness;
            tm.tm_mon = s->rtc.new.tm_mon;
            break;
        case 6:
            tm.tm_year = s->rtc.new.tm_year;
            break;
        case 7:
            /* TODO set .tm_mday instead */
            tm.tm_wday = s->rtc.new.tm_wday;
            break;
        case 8:
            if (s->rtc.new.tm_hour > 23)
                goto rtc_badness;
            if (s->rtc.new.tm_mday < 1)
                goto rtc_badness;
            if (s->rtc.new.tm_mon < 0 || s->rtc.new.tm_mon > 11)
                goto rtc_badness;
            tm.tm_sec = s->rtc.new.tm_sec;
            tm.tm_min = s->rtc.new.tm_min;
            tm.tm_hour = s->rtc.new.tm_hour;
            tm.tm_mday = s->rtc.new.tm_mday;
            tm.tm_mon = s->rtc.new.tm_mon;
            tm.tm_year = s->rtc.new.tm_year;
            break;
        rtc_badness:
        default:
            fprintf(stderr, "%s: bad RTC_UPDATE value %02x\n",
                            __FUNCTION__, value);
            s->status |= 1 << 10;				/* RTCERR */
            menelaus_update(s);
        }
        s->rtc.sec_offset = qemu_timedate_diff(&tm);
        break;
    case MENELAUS_RTC_SEC:
        s->rtc.tm.tm_sec = from_bcd(value & 0x7f);
        break;
    case MENELAUS_RTC_MIN:
        s->rtc.tm.tm_min = from_bcd(value & 0x7f);
        break;
    case MENELAUS_RTC_HR:
        s->rtc.tm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?	/* MODE12_n24 */
                MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
                from_bcd(value & 0x3f);
        break;
    case MENELAUS_RTC_DAY:
        s->rtc.tm.tm_mday = from_bcd(value);
        break;
    case MENELAUS_RTC_MON:
        s->rtc.tm.tm_mon = MAX(1, from_bcd(value)) - 1;
        break;
    case MENELAUS_RTC_YR:
        s->rtc.tm.tm_year = 2000 + from_bcd(value);
        break;
    case MENELAUS_RTC_WKDAY:
        s->rtc.tm.tm_mday = from_bcd(value);
        break;
    case MENELAUS_RTC_AL_SEC:
        s->rtc.alm.tm_sec = from_bcd(value & 0x7f);
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_AL_MIN:
        s->rtc.alm.tm_min = from_bcd(value & 0x7f);
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_AL_HR:
        s->rtc.alm.tm_hour = (s->rtc.ctrl & (1 << 2)) ?	/* MODE12_n24 */
                MIN(from_bcd(value & 0x3f), 12) + ((value >> 7) ? 11 : -1) :
                from_bcd(value & 0x3f);
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_AL_DAY:
        s->rtc.alm.tm_mday = from_bcd(value);
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_AL_MON:
        s->rtc.alm.tm_mon = MAX(1, from_bcd(value)) - 1;
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_AL_YR:
        s->rtc.alm.tm_year = 2000 + from_bcd(value);
        menelaus_alm_update(s);
        break;
    case MENELAUS_RTC_COMP_MSB:
        s->rtc.comp &= 0xff;
        s->rtc.comp |= value << 8;
        break;
    case MENELAUS_RTC_COMP_LSB:
        s->rtc.comp &= 0xff << 8;
        s->rtc.comp |= value;
        break;

    case MENELAUS_S1_PULL_EN:
        s->pull[0] = value;
        break;
    case MENELAUS_S1_PULL_DIR:
        s->pull[1] = value & 0x1f;
        break;
    case MENELAUS_S2_PULL_EN:
        s->pull[2] = value;
        break;
    case MENELAUS_S2_PULL_DIR:
        s->pull[3] = value & 0x1f;
        break;

    case MENELAUS_MCT_CTRL1:
        s->mmc_ctrl[0] = value & 0x7f;
        break;
    case MENELAUS_MCT_CTRL2:
        s->mmc_ctrl[1] = value;
        /* TODO update Card Detect interrupts */
        break;
    case MENELAUS_MCT_CTRL3:
        s->mmc_ctrl[2] = value & 0xf;
        break;
    case MENELAUS_DEBOUNCE1:
        s->mmc_debounce = value & 0x3f;
        break;

    default:
#ifdef VERBOSE
        printf("%s: unknown register %02x\n", __FUNCTION__, addr);
#endif
    }
}

static void menelaus_event(i2c_slave *i2c, enum i2c_event event)
{
    struct menelaus_s *s = (struct menelaus_s *) i2c;

    if (event == I2C_START_SEND)
        s->firstbyte = 1;
}

static int menelaus_tx(i2c_slave *i2c, uint8_t data)
{
    struct menelaus_s *s = (struct menelaus_s *) i2c;
    /* Interpret register address byte */
    if (s->firstbyte) {
        s->reg = data;
        s->firstbyte = 0;
    } else
        menelaus_write(s, s->reg ++, data);

    return 0;
}

static int menelaus_rx(i2c_slave *i2c)
{
    struct menelaus_s *s = (struct menelaus_s *) i2c;

    return menelaus_read(s, s->reg ++);
}

static void tm_put(QEMUFile *f, struct tm *tm) {
    qemu_put_be16(f, tm->tm_sec);
    qemu_put_be16(f, tm->tm_min);
    qemu_put_be16(f, tm->tm_hour);
    qemu_put_be16(f, tm->tm_mday);
    qemu_put_be16(f, tm->tm_min);
    qemu_put_be16(f, tm->tm_year);
}

static void tm_get(QEMUFile *f, struct tm *tm) {
    tm->tm_sec = qemu_get_be16(f);
    tm->tm_min = qemu_get_be16(f);
    tm->tm_hour = qemu_get_be16(f);
    tm->tm_mday = qemu_get_be16(f);
    tm->tm_min = qemu_get_be16(f);
    tm->tm_year = qemu_get_be16(f);
}

static void menelaus_save(QEMUFile *f, void *opaque)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;

    qemu_put_be32(f, s->firstbyte);
    qemu_put_8s(f, &s->reg);

    qemu_put_8s(f, &s->vcore[0]);
    qemu_put_8s(f, &s->vcore[1]);
    qemu_put_8s(f, &s->vcore[2]);
    qemu_put_8s(f, &s->vcore[3]);
    qemu_put_8s(f, &s->vcore[4]);
    qemu_put_8s(f, &s->dcdc[3]);
    qemu_put_8s(f, &s->dcdc[3]);
    qemu_put_8s(f, &s->dcdc[3]);
    qemu_put_8s(f, &s->ldo[0]);
    qemu_put_8s(f, &s->ldo[1]);
    qemu_put_8s(f, &s->ldo[2]);
    qemu_put_8s(f, &s->ldo[3]);
    qemu_put_8s(f, &s->ldo[4]);
    qemu_put_8s(f, &s->ldo[5]);
    qemu_put_8s(f, &s->ldo[6]);
    qemu_put_8s(f, &s->ldo[7]);
    qemu_put_8s(f, &s->sleep[0]);
    qemu_put_8s(f, &s->sleep[1]);
    qemu_put_8s(f, &s->osc);
    qemu_put_8s(f, &s->detect);
    qemu_put_be16s(f, &s->mask);
    qemu_put_be16s(f, &s->status);
    qemu_put_8s(f, &s->dir);
    qemu_put_8s(f, &s->inputs);
    qemu_put_8s(f, &s->outputs);
    qemu_put_8s(f, &s->bbsms);
    qemu_put_8s(f, &s->pull[0]);
    qemu_put_8s(f, &s->pull[1]);
    qemu_put_8s(f, &s->pull[2]);
    qemu_put_8s(f, &s->pull[3]);
    qemu_put_8s(f, &s->mmc_ctrl[0]);
    qemu_put_8s(f, &s->mmc_ctrl[1]);
    qemu_put_8s(f, &s->mmc_ctrl[2]);
    qemu_put_8s(f, &s->mmc_debounce);
    qemu_put_8s(f, &s->rtc.ctrl);
    qemu_put_be16s(f, &s->rtc.comp);
    /* Should be <= 1000 */
    qemu_put_be16(f, s->rtc.next - qemu_get_clock(rt_clock));
    tm_put(f, &s->rtc.new);
    tm_put(f, &s->rtc.alm);
    qemu_put_byte(f, s->pwrbtn_state);

    i2c_slave_save(f, &s->i2c);
}

static int menelaus_load(QEMUFile *f, void *opaque, int version_id)
{
    struct menelaus_s *s = (struct menelaus_s *) opaque;

    s->firstbyte = qemu_get_be32(f);
    qemu_get_8s(f, &s->reg);

    if (s->rtc.ctrl & 1)					/* RTC_EN */
        menelaus_rtc_stop(s);
    qemu_get_8s(f, &s->vcore[0]);
    qemu_get_8s(f, &s->vcore[1]);
    qemu_get_8s(f, &s->vcore[2]);
    qemu_get_8s(f, &s->vcore[3]);
    qemu_get_8s(f, &s->vcore[4]);
    qemu_get_8s(f, &s->dcdc[3]);
    qemu_get_8s(f, &s->dcdc[3]);
    qemu_get_8s(f, &s->dcdc[3]);
    qemu_get_8s(f, &s->ldo[0]);
    qemu_get_8s(f, &s->ldo[1]);
    qemu_get_8s(f, &s->ldo[2]);
    qemu_get_8s(f, &s->ldo[3]);
    qemu_get_8s(f, &s->ldo[4]);
    qemu_get_8s(f, &s->ldo[5]);
    qemu_get_8s(f, &s->ldo[6]);
    qemu_get_8s(f, &s->ldo[7]);
    qemu_get_8s(f, &s->sleep[0]);
    qemu_get_8s(f, &s->sleep[1]);
    qemu_get_8s(f, &s->osc);
    qemu_get_8s(f, &s->detect);
    qemu_get_be16s(f, &s->mask);
    qemu_get_be16s(f, &s->status);
    qemu_get_8s(f, &s->dir);
    qemu_get_8s(f, &s->inputs);
    qemu_get_8s(f, &s->outputs);
    qemu_get_8s(f, &s->bbsms);
    qemu_get_8s(f, &s->pull[0]);
    qemu_get_8s(f, &s->pull[1]);
    qemu_get_8s(f, &s->pull[2]);
    qemu_get_8s(f, &s->pull[3]);
    qemu_get_8s(f, &s->mmc_ctrl[0]);
    qemu_get_8s(f, &s->mmc_ctrl[1]);
    qemu_get_8s(f, &s->mmc_ctrl[2]);
    qemu_get_8s(f, &s->mmc_debounce);
    qemu_get_8s(f, &s->rtc.ctrl);
    qemu_get_be16s(f, &s->rtc.comp);
    s->rtc.next = qemu_get_be16(f);
    tm_get(f, &s->rtc.new);
    tm_get(f, &s->rtc.alm);
    s->pwrbtn_state = qemu_get_byte(f);
    menelaus_alm_update(s);
    menelaus_update(s);
    if (s->rtc.ctrl & 1)					/* RTC_EN */
        menelaus_rtc_start(s);

    i2c_slave_load(f, &s->i2c);
    return 0;
}

i2c_slave *twl92230_init(i2c_bus *bus, qemu_irq irq)
{
    struct menelaus_s *s = (struct menelaus_s *)
            i2c_slave_init(bus, 0, sizeof(struct menelaus_s));

    s->i2c.event = menelaus_event;
    s->i2c.recv = menelaus_rx;
    s->i2c.send = menelaus_tx;

    s->irq = irq;
    s->rtc.hz_tm = qemu_new_timer(rt_clock, menelaus_rtc_hz, s);
    s->in = qemu_allocate_irqs(menelaus_gpio_set, s, 3);
    s->pwrbtn = qemu_allocate_irqs(menelaus_pwrbtn_set, s, 1)[0];

    menelaus_reset(&s->i2c);

    register_savevm("menelaus", -1, 0, menelaus_save, menelaus_load, s);

    return &s->i2c;
}

qemu_irq *twl92230_gpio_in_get(i2c_slave *i2c)
{
    struct menelaus_s *s = (struct menelaus_s *) i2c;

    return s->in;
}

void twl92230_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler)
{
    struct menelaus_s *s = (struct menelaus_s *) i2c;

    if (line >= 3 || line < 0) {
        fprintf(stderr, "%s: No GPO line %i\n", __FUNCTION__, line);
        exit(-1);
    }
    s->handler[line] = handler;
}