tsc210x.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

    case 0x07:	/* AUX1 */
    case 0x08:	/* AUX2 */
    case 0x09:	/* TEMP1 */
    case 0x0a:	/* TEMP2 */
        return;

    default:
#ifdef TSC_VERBOSE
        fprintf(stderr, "tsc2102_data_register_write: "
                        "no such register: 0x%02x\n", reg);
#endif
    }
}

static void tsc2102_control_register_write(
                struct tsc210x_state_s *s, int reg, uint16_t value)
{
    switch (reg) {
    case 0x00:	/* TSC ADC */
        s->host_mode = value >> 15;
        s->enabled = !(value & 0x4000);
        if (s->busy && !s->enabled)
            qemu_del_timer(s->timer);
        s->busy &= s->enabled;
        s->nextfunction = (value >> 10) & 0xf;
        s->nextprecision = (value >> 8) & 3;
        s->filter = value & 0xff;
        return;

    case 0x01:	/* Status */
        s->pin_func = value >> 14;
        return;

    case 0x03:	/* Reference */
        s->ref = value & 0x1f;
        return;

    case 0x04:	/* Reset */
        if (value == 0xbb00) {
            if (s->busy)
                qemu_del_timer(s->timer);
            tsc210x_reset(s);
#ifdef TSC_VERBOSE
        } else {
            fprintf(stderr, "tsc2102_control_register_write: "
                            "wrong value written into RESET\n");
#endif
        }
        return;

    case 0x05:	/* Configuration */
        s->timing = value & 0x3f;
#ifdef TSC_VERBOSE
        if (value & ~0x3f)
            fprintf(stderr, "tsc2102_control_register_write: "
                            "wrong value written into CONFIG\n");
#endif
        return;

    default:
#ifdef TSC_VERBOSE
        fprintf(stderr, "tsc2102_control_register_write: "
                        "no such register: 0x%02x\n", reg);
#endif
    }
}

static void tsc2102_audio_register_write(
                struct tsc210x_state_s *s, int reg, uint16_t value)
{
    switch (reg) {
    case 0x00:	/* Audio Control 1 */
        s->audio_ctrl1 = value & 0x0f3f;
#ifdef TSC_VERBOSE
        if ((value & ~0x0f3f) || ((value & 7) != ((value >> 3) & 7)))
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into Audio 1\n");
#endif
        tsc2102_audio_rate_update(s);
        if (s->audio)
            tsc2102_audio_output_update(s);
        return;

    case 0x01:
#ifdef TSC_VERBOSE
        if (value != 0xff00)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into reg 0x01\n");
#endif
        return;

    case 0x02:	/* DAC Volume Control */
        s->volume = value;
        s->volume_change = qemu_get_clock(vm_clock);
        return;

    case 0x03:
#ifdef TSC_VERBOSE
        if (value != 0x8b00)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into reg 0x03\n");
#endif
        return;

    case 0x04:	/* Audio Control 2 */
        s->audio_ctrl2 = value & 0xf7f2;
#ifdef TSC_VERBOSE
        if (value & ~0xf7fd)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into Audio 2\n");
#endif
        return;

    case 0x05:	/* Stereo DAC Power Control */
        if ((value & ~s->dac_power) & (1 << 10))
            s->powerdown = qemu_get_clock(vm_clock);

        s->dac_power = value & 0x9543;
#ifdef TSC_VERBOSE
        if ((value & ~0x9543) != 0x2aa0)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into Power\n");
#endif
        tsc2102_audio_rate_update(s);
        if (s->audio)
            tsc2102_audio_output_update(s);
        return;

    case 0x06:	/* Audio Control 3 */
        s->audio_ctrl3 &= 0x00c0;
        s->audio_ctrl3 |= value & 0xf800;
#ifdef TSC_VERBOSE
        if (value & ~0xf8c7)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into Audio 3\n");
#endif
        if (s->audio)
            tsc2102_audio_output_update(s);
        return;

    case 0x07:	/* LCH_BASS_BOOST_N0 */
    case 0x08:	/* LCH_BASS_BOOST_N1 */
    case 0x09:	/* LCH_BASS_BOOST_N2 */
    case 0x0a:	/* LCH_BASS_BOOST_N3 */
    case 0x0b:	/* LCH_BASS_BOOST_N4 */
    case 0x0c:	/* LCH_BASS_BOOST_N5 */
    case 0x0d:	/* LCH_BASS_BOOST_D1 */
    case 0x0e:	/* LCH_BASS_BOOST_D2 */
    case 0x0f:	/* LCH_BASS_BOOST_D4 */
    case 0x10:	/* LCH_BASS_BOOST_D5 */
    case 0x11:	/* RCH_BASS_BOOST_N0 */
    case 0x12:	/* RCH_BASS_BOOST_N1 */
    case 0x13:	/* RCH_BASS_BOOST_N2 */
    case 0x14:	/* RCH_BASS_BOOST_N3 */
    case 0x15:	/* RCH_BASS_BOOST_N4 */
    case 0x16:	/* RCH_BASS_BOOST_N5 */
    case 0x17:	/* RCH_BASS_BOOST_D1 */
    case 0x18:	/* RCH_BASS_BOOST_D2 */
    case 0x19:	/* RCH_BASS_BOOST_D4 */
    case 0x1a:	/* RCH_BASS_BOOST_D5 */
        s->filter_data[reg - 0x07] = value;
        return;

    case 0x1b:	/* PLL Programmability 1 */
        s->pll[0] = value & 0xfffc;
#ifdef TSC_VERBOSE
        if (value & ~0xfffc)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into PLL 1\n");
#endif
        return;

    case 0x1c:	/* PLL Programmability 2 */
        s->pll[1] = value & 0xfffc;
#ifdef TSC_VERBOSE
        if (value & ~0xfffc)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into PLL 2\n");
#endif
        return;

    case 0x1d:	/* Audio Control 4 */
        s->softstep = !(value & 0x4000);
#ifdef TSC_VERBOSE
        if (value & ~0x4000)
            fprintf(stderr, "tsc2102_audio_register_write: "
                            "wrong value written into Audio 4\n");
#endif
        return;

    default:
#ifdef TSC_VERBOSE
        fprintf(stderr, "tsc2102_audio_register_write: "
                        "no such register: 0x%02x\n", reg);
#endif
    }
}

/* This handles most of the chip logic.  */
static void tsc210x_pin_update(struct tsc210x_state_s *s)
{
    int64_t expires;
    int pin_state;

    switch (s->pin_func) {
    case 0:
        pin_state = s->pressure;
        break;
    case 1:
        pin_state = !!s->dav;
        break;
    case 2:
    default:
        pin_state = s->pressure && !s->dav;
    }

    if (!s->enabled)
        pin_state = 0;

    if (pin_state != s->irq) {
        s->irq = pin_state;
        qemu_set_irq(s->pint, !s->irq);
    }

    switch (s->nextfunction) {
    case TSC_MODE_XY_SCAN:
    case TSC_MODE_XYZ_SCAN:
        if (!s->pressure)
            return;
        break;

    case TSC_MODE_X:
    case TSC_MODE_Y:
    case TSC_MODE_Z:
        if (!s->pressure)
            return;
        /* Fall through */
    case TSC_MODE_BAT1:
    case TSC_MODE_BAT2:
    case TSC_MODE_AUX:
    case TSC_MODE_TEMP1:
    case TSC_MODE_TEMP2:
        if (s->dav)
            s->enabled = 0;
        break;

    case TSC_MODE_AUX_SCAN:
    case TSC_MODE_PORT_SCAN:
        break;

    case TSC_MODE_NO_SCAN:
    case TSC_MODE_XX_DRV:
    case TSC_MODE_YY_DRV:
    case TSC_MODE_YX_DRV:
    default:
        return;
    }

    if (!s->enabled || s->busy)
        return;

    s->busy = 1;
    s->precision = s->nextprecision;
    s->function = s->nextfunction;
    expires = qemu_get_clock(vm_clock) + (ticks_per_sec >> 10);
    qemu_mod_timer(s->timer, expires);
}

static uint16_t tsc210x_read(struct tsc210x_state_s *s)
{
    uint16_t ret = 0x0000;

    if (!s->command)
        fprintf(stderr, "tsc210x_read: SPI underrun!\n");

    switch (s->page) {
    case TSC_DATA_REGISTERS_PAGE:
        ret = tsc2102_data_register_read(s, s->offset);
        break;
    case TSC_CONTROL_REGISTERS_PAGE:
        ret = tsc2102_control_register_read(s, s->offset);
        break;
    case TSC_AUDIO_REGISTERS_PAGE:
        ret = tsc2102_audio_register_read(s, s->offset);
        break;
    default:
        cpu_abort(cpu_single_env, "tsc210x_read: wrong memory page\n");
    }

    tsc210x_pin_update(s);

    /* Allow sequential reads.  */
    s->offset ++;
    s->state = 0;
    return ret;
}

static void tsc210x_write(struct tsc210x_state_s *s, uint16_t value)
{
    /*
     * This is a two-state state machine for reading
     * command and data every second time.
     */
    if (!s->state) {
        s->command = value >> 15;
        s->page = (value >> 11) & 0x0f;
        s->offset = (value >> 5) & 0x3f;
        s->state = 1;
    } else {
        if (s->command)
            fprintf(stderr, "tsc210x_write: SPI overrun!\n");
        else
            switch (s->page) {
            case TSC_DATA_REGISTERS_PAGE:
                tsc2102_data_register_write(s, s->offset, value);
                break;
            case TSC_CONTROL_REGISTERS_PAGE:
                tsc2102_control_register_write(s, s->offset, value);
                break;
            case TSC_AUDIO_REGISTERS_PAGE:
                tsc2102_audio_register_write(s, s->offset, value);
                break;
            default:
                cpu_abort(cpu_single_env,
                                "tsc210x_write: wrong memory page\n");
            }

        tsc210x_pin_update(s);
        s->state = 0;
    }
}

static void tsc210x_timer_tick(void *opaque)
{
    struct tsc210x_state_s *s = opaque;

    /* Timer ticked -- a set of conversions has been finished.  */

    if (!s->busy)
        return;

    s->busy = 0;
    s->dav |= mode_regs[s->function];
    tsc210x_pin_update(s);
}

static void tsc210x_touchscreen_event(void *opaque,
                int x, int y, int z, int buttons_state)
{
    struct tsc210x_state_s *s = opaque;
    int p = s->pressure;

    if (buttons_state) {
        s->x = x;
        s->y = y;
    }
    s->pressure = !!buttons_state;

    /*
     * Note: We would get better responsiveness in the guest by
     * signaling TS events immediately, but for now we simulate
     * the first conversion delay for sake of correctness.
     */
    if (p != s->pressure)
        tsc210x_pin_update(s);
}

static void tsc210x_i2s_swallow(struct tsc210x_state_s *s)
{
    if (s->dac_voice[0])
        tsc210x_out_flush(s, s->codec.out.len);
    else
        s->codec.out.len = 0;
}

static void tsc210x_i2s_set_rate(struct tsc210x_state_s *s, int in, int out)
{
    s->i2s_tx_rate = out;
    s->i2s_rx_rate = in;
}

static void tsc210x_save(QEMUFile *f, void *opaque)
{
    struct tsc210x_state_s *s = (struct tsc210x_state_s *) opaque;
    int64_t now = qemu_get_clock(vm_clock);
    int i;

    qemu_put_be16(f, s->x);
    qemu_put_be16(f, s->y);
    qemu_put_byte(f, s->pressure);

    qemu_put_byte(f, s->state);
    qemu_put_byte(f, s->page);
    qemu_put_byte(f, s->offset);
    qemu_put_byte(f, s->command);

    qemu_put_byte(f, s->irq);
    qemu_put_be16s(f, &s->dav);

    qemu_put_timer(f, s->timer);
    qemu_put_byte(f, s->enabled);
    qemu_put_byte(f, s->host_mode);
    qemu_put_byte(f, s->function);
    qemu_put_byte(f, s->nextfunction);
    qemu_put_byte(f, s->precision);
    qemu_put_byte(f, s->nextprecision);
    qemu_put_byte(f, s->filter);
    qemu_put_byte(f, s->pin_func);
    qemu_put_byte(f, s->ref);
    qemu_put_byte(f, s->timing);
    qemu_put_be32(f, s->noise);

    qemu_put_be16s(f, &s->audio_ctrl1);
    qemu_put_be16s(f, &s->audio_ctrl2);
    qemu_put_be16s(f, &s->audio_ctrl3);
    qemu_put_be16s(f, &s->pll[0]);
    qemu_put_be16s(f, &s->pll[1]);
    qemu_put_be16s(f, &s->volume);
    qemu_put_be64(f, (uint64_t) (s->volume_change - now));
    qemu_put_be64(f, (uint64_t) (s->powerdown - now));
    qemu_put_byte(f, s->softstep);
    qemu_put_be16s(f, &s->dac_power);

    for (i = 0; i < 0x14; i ++)
        qemu_put_be16s(f, &s->filter_data[i]);
}

static int tsc210x_load(QEMUFile *f, void *opaque, int version_id)
{
    struct tsc210x_state_s *s = (struct tsc210x_state_s *) opaque;
    int64_t now = qemu_get_clock(vm_clock);
    int i;

    s->x = qemu_get_be16(f);
    s->y = qemu_get_be16(f);
    s->pressure = qemu_get_byte(f);

    s->state = qemu_get_byte(f);
    s->page = qemu_get_byte(f);
    s->offset = qemu_get_byte(f);
    s->command = qemu_get_byte(f);

    s->irq = qemu_get_byte(f);
    qemu_get_be16s(f, &s->dav);

    qemu_get_timer(f, s->timer);
    s->enabled = qemu_get_byte(f);
    s->host_mode = qemu_get_byte(f);
    s->function = qemu_get_byte(f);
    s->nextfunction = qemu_get_byte(f);
    s->precision = qemu_get_byte(f);
    s->nextprecision = qemu_get_byte(f);
    s->filter = qemu_get_byte(f);
    s->pin_func = qemu_get_byte(f);
    s->ref = qemu_get_byte(f);
    s->timing = qemu_get_byte(f);
    s->noise = qemu_get_be32(f);

    qemu_get_be16s(f, &s->audio_ctrl1);
    qemu_get_be16s(f, &s->audio_ctrl2);
    qemu_get_be16s(f, &s->audio_ctrl3);
    qemu_get_be16s(f, &s->pll[0]);
    qemu_get_be16s(f, &s->pll[1]);
    qemu_get_be16s(f, &s->volume);
    s->volume_change = (int64_t) qemu_get_be64(f) + now;
    s->powerdown = (int64_t) qemu_get_be64(f) + now;
    s->softstep = qemu_get_byte(f);
    qemu_get_be16s(f, &s->dac_power);

    for (i = 0; i < 0x14; i ++)
        qemu_get_be16s(f, &s->filter_data[i]);

    s->busy = qemu_timer_pending(s->timer);
    qemu_set_irq(s->pint, !s->irq);

    return 0;
}

static int tsc2102_iid = 0;

struct uwire_slave_s *tsc2102_init(qemu_irq pint, AudioState *audio)
{
    struct tsc210x_state_s *s;

    s = (struct tsc210x_state_s *)
            qemu_mallocz(sizeof(struct tsc210x_state_s));
    memset(s, 0, sizeof(struct tsc210x_state_s));
    s->x = 160;
    s->y = 160;
    s->pressure = 0;
    s->precision = s->nextprecision = 0;
    s->timer = qemu_new_timer(vm_clock, tsc210x_timer_tick, s);
    s->pint = pint;
    s->name = "tsc2102";
    s->audio = audio;

    s->chip.opaque = s;
    s->chip.send = (void *) tsc210x_write;
    s->chip.receive = (void *) tsc210x_read;

    s->codec.opaque = s;
    s->codec.tx_swallow = (void *) tsc210x_i2s_swallow;
    s->codec.set_rate = (void *) tsc210x_i2s_set_rate;
    s->codec.in.fifo = s->in_fifo;
    s->codec.out.fifo = s->out_fifo;

    tsc210x_reset(s);

    qemu_add_mouse_event_handler(tsc210x_touchscreen_event, s, 1,
                    "QEMU TSC2102-driven Touchscreen");

    if (s->audio)
        AUD_register_card(s->audio, s->name, &s->card);

    qemu_register_reset((void *) tsc210x_reset, s);
    register_savevm(s->name, tsc2102_iid ++, 0,
                    tsc210x_save, tsc210x_load, s);

    return &s->chip;
}

struct i2s_codec_s *tsc210x_codec(struct uwire_slave_s *chip)
{
    struct tsc210x_state_s *s = (struct tsc210x_state_s *) chip->opaque;

    return &s->codec;
}