wm8750.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

        return 1;
#endif
    }
    s->i2c_data[s->i2c_len ++] = data;
    if (s->i2c_len != 2)
        return 0;

    cmd = s->i2c_data[0] >> 1;
    value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;

    switch (cmd) {
    case WM8750_LADCIN:	/* ADC Signal Path Control (Left) */
        s->diff[0] = (((value >> 6) & 3) == 3);	/* LINSEL */
        if (s->diff[0])
            s->in[0] = &s->adc_voice[0 + s->ds * 1];
        else
            s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
        break;

    case WM8750_RADCIN:	/* ADC Signal Path Control (Right) */
        s->diff[1] = (((value >> 6) & 3) == 3);	/* RINSEL */
        if (s->diff[1])
            s->in[1] = &s->adc_voice[0 + s->ds * 1];
        else
            s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
        break;

    case WM8750_ADCIN:	/* ADC Input Mode */
        s->ds = (value >> 8) & 1;	/* DS */
        if (s->diff[0])
            s->in[0] = &s->adc_voice[0 + s->ds * 1];
        if (s->diff[1])
            s->in[1] = &s->adc_voice[0 + s->ds * 1];
        s->monomix[0] = (value >> 6) & 3;	/* MONOMIX */
        break;

    case WM8750_ADCTL1:	/* Additional Control (1) */
        s->monomix[1] = (value >> 1) & 1;	/* DMONOMIX */
        break;

    case WM8750_PWR1:	/* Power Management (1) */
        s->enable = ((value >> 6) & 7) == 3;	/* VMIDSEL, VREF */
        wm8750_set_format(s);
        break;

    case WM8750_LINVOL:	/* Left Channel PGA */
        s->invol[0] = value & 0x3f;		/* LINVOL */
        s->inmute[0] = (value >> 7) & 1;	/* LINMUTE */
        wm8750_mask_update(s);
        break;

    case WM8750_RINVOL:	/* Right Channel PGA */
        s->invol[1] = value & 0x3f;		/* RINVOL */
        s->inmute[1] = (value >> 7) & 1;	/* RINMUTE */
        wm8750_mask_update(s);
        break;

    case WM8750_ADCDAC:	/* ADC and DAC Control */
        s->pol = (value >> 5) & 3;		/* ADCPOL */
        s->mute = (value >> 3) & 1;		/* DACMU */
        wm8750_mask_update(s);
        break;

    case WM8750_ADCTL3:	/* Additional Control (3) */
        break;

    case WM8750_LADC:	/* Left ADC Digital Volume */
        s->invol[2] = value & 0xff;		/* LADCVOL */
        break;

    case WM8750_RADC:	/* Right ADC Digital Volume */
        s->invol[3] = value & 0xff;		/* RADCVOL */
        break;

    case WM8750_ALC1:	/* ALC Control (1) */
        s->alc = (value >> 7) & 3;		/* ALCSEL */
        break;

    case WM8750_NGATE:	/* Noise Gate Control */
    case WM8750_3D:	/* 3D enhance */
        break;

    case WM8750_LDAC:	/* Left Channel Digital Volume */
        s->outvol[0] = value & 0xff;		/* LDACVOL */
        break;

    case WM8750_RDAC:	/* Right Channel Digital Volume */
        s->outvol[1] = value & 0xff;		/* RDACVOL */
        break;

    case WM8750_BASS:	/* Bass Control */
        break;

    case WM8750_LOUTM1:	/* Left Mixer Control (1) */
        s->path[0] = (value >> 8) & 1;		/* LD2LO */
        break;

    case WM8750_LOUTM2:	/* Left Mixer Control (2) */
        s->path[1] = (value >> 8) & 1;		/* RD2LO */
        break;

    case WM8750_ROUTM1:	/* Right Mixer Control (1) */
        s->path[2] = (value >> 8) & 1;		/* LD2RO */
        break;

    case WM8750_ROUTM2:	/* Right Mixer Control (2) */
        s->path[3] = (value >> 8) & 1;		/* RD2RO */
        break;

    case WM8750_MOUTM1:	/* Mono Mixer Control (1) */
        s->mpath[0] = (value >> 8) & 1;		/* LD2MO */
        break;

    case WM8750_MOUTM2:	/* Mono Mixer Control (2) */
        s->mpath[1] = (value >> 8) & 1;		/* RD2MO */
        break;

    case WM8750_LOUT1V:	/* LOUT1 Volume */
        s->outvol[2] = value & 0x7f;		/* LOUT2VOL */
        break;

    case WM8750_LOUT2V:	/* LOUT2 Volume */
        s->outvol[4] = value & 0x7f;		/* LOUT2VOL */
        break;

    case WM8750_ROUT1V:	/* ROUT1 Volume */
        s->outvol[3] = value & 0x7f;		/* ROUT2VOL */
        break;

    case WM8750_ROUT2V:	/* ROUT2 Volume */
        s->outvol[5] = value & 0x7f;		/* ROUT2VOL */
        break;

    case WM8750_MOUTV:	/* MONOOUT Volume */
        s->outvol[6] = value & 0x7f;		/* MONOOUTVOL */
        break;

    case WM8750_ADCTL2:	/* Additional Control (2) */
        break;

    case WM8750_PWR2:	/* Power Management (2) */
        s->power = value & 0x7e;
        break;

    case WM8750_IFACE:	/* Digital Audio Interface Format */
#ifdef VERBOSE
        if (value & 0x40)			/* MS */
            printf("%s: attempt to enable Master Mode\n", __FUNCTION__);
#endif
        s->format = value;
        wm8750_set_format(s);
        break;

    case WM8750_SRATE:	/* Clocking and Sample Rate Control */
        s->rate = &wm_rate_table[(value >> 1) & 0x1f];
        wm8750_set_format(s);
        break;

    case WM8750_RESET:	/* Reset */
        wm8750_reset(&s->i2c);
        break;

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

    return 0;
}

static int wm8750_rx(i2c_slave *i2c)
{
    return 0x00;
}

static void wm8750_save(QEMUFile *f, void *opaque)
{
    struct wm8750_s *s = (struct wm8750_s *) opaque;
    int i;
    qemu_put_8s(f, &s->i2c_data[0]);
    qemu_put_8s(f, &s->i2c_data[1]);
    qemu_put_be32(f, s->i2c_len);
    qemu_put_be32(f, s->enable);
    qemu_put_be32(f, s->idx_in);
    qemu_put_be32(f, s->req_in);
    qemu_put_be32(f, s->idx_out);
    qemu_put_be32(f, s->req_out);

    for (i = 0; i < 7; i ++)
        qemu_put_8s(f, &s->outvol[i]);
    for (i = 0; i < 2; i ++)
        qemu_put_8s(f, &s->outmute[i]);
    for (i = 0; i < 4; i ++)
        qemu_put_8s(f, &s->invol[i]);
    for (i = 0; i < 2; i ++)
        qemu_put_8s(f, &s->inmute[i]);

    for (i = 0; i < 2; i ++)
        qemu_put_8s(f, &s->diff[i]);
    qemu_put_8s(f, &s->pol);
    qemu_put_8s(f, &s->ds);
    for (i = 0; i < 2; i ++)
        qemu_put_8s(f, &s->monomix[i]);
    qemu_put_8s(f, &s->alc);
    qemu_put_8s(f, &s->mute);
    for (i = 0; i < 4; i ++)
        qemu_put_8s(f, &s->path[i]);
    for (i = 0; i < 2; i ++)
        qemu_put_8s(f, &s->mpath[i]);
    qemu_put_8s(f, &s->format);
    qemu_put_8s(f, &s->power);
    qemu_put_be32s(f, &s->inmask);
    qemu_put_be32s(f, &s->outmask);
    qemu_put_byte(f, (s->rate - wm_rate_table) / sizeof(*s->rate));
    i2c_slave_save(f, &s->i2c);
}

static int wm8750_load(QEMUFile *f, void *opaque, int version_id)
{
    struct wm8750_s *s = (struct wm8750_s *) opaque;
    int i;
    qemu_get_8s(f, &s->i2c_data[0]);
    qemu_get_8s(f, &s->i2c_data[1]);
    s->i2c_len = qemu_get_be32(f);
    s->enable = qemu_get_be32(f);
    s->idx_in = qemu_get_be32(f);
    s->req_in = qemu_get_be32(f);
    s->idx_out = qemu_get_be32(f);
    s->req_out = qemu_get_be32(f);

    for (i = 0; i < 7; i ++)
        qemu_get_8s(f, &s->outvol[i]);
    for (i = 0; i < 2; i ++)
        qemu_get_8s(f, &s->outmute[i]);
    for (i = 0; i < 4; i ++)
        qemu_get_8s(f, &s->invol[i]);
    for (i = 0; i < 2; i ++)
        qemu_get_8s(f, &s->inmute[i]);

    for (i = 0; i < 2; i ++)
        qemu_get_8s(f, &s->diff[i]);
    qemu_get_8s(f, &s->pol);
    qemu_get_8s(f, &s->ds);
    for (i = 0; i < 2; i ++)
        qemu_get_8s(f, &s->monomix[i]);
    qemu_get_8s(f, &s->alc);
    qemu_get_8s(f, &s->mute);
    for (i = 0; i < 4; i ++)
        qemu_get_8s(f, &s->path[i]);
    for (i = 0; i < 2; i ++)
        qemu_get_8s(f, &s->mpath[i]);
    qemu_get_8s(f, &s->format);
    qemu_get_8s(f, &s->power);
    qemu_get_be32s(f, &s->inmask);
    qemu_get_be32s(f, &s->outmask);
    s->rate = &wm_rate_table[(uint8_t) qemu_get_byte(f) & 0x1f];
    i2c_slave_load(f, &s->i2c);
    return 0;
}

static int wm8750_iid = 0;

i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio)
{
    struct wm8750_s *s = (struct wm8750_s *)
            i2c_slave_init(bus, 0, sizeof(struct wm8750_s));
    s->i2c.event = wm8750_event;
    s->i2c.recv = wm8750_rx;
    s->i2c.send = wm8750_tx;

    AUD_register_card(audio, CODEC, &s->card);
    wm8750_reset(&s->i2c);

    register_savevm(CODEC, wm8750_iid ++, 0, wm8750_save, wm8750_load, s);

    return &s->i2c;
}

static void wm8750_fini(i2c_slave *i2c)
{
    struct wm8750_s *s = (struct wm8750_s *) i2c;
    wm8750_reset(&s->i2c);
    AUD_remove_card(&s->card);
    qemu_free(s);
}

void wm8750_data_req_set(i2c_slave *i2c,
                void (*data_req)(void *, int, int), void *opaque)
{
    struct wm8750_s *s = (struct wm8750_s *) i2c;
    s->data_req = data_req;
    s->opaque = opaque;
}

void wm8750_dac_dat(void *opaque, uint32_t sample)
{
    struct wm8750_s *s = (struct wm8750_s *) opaque;
    uint32_t *data = (uint32_t *) &s->data_out[s->idx_out];
    *data = sample & s->outmask;
    s->req_out -= 4;
    s->idx_out += 4;
    if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
        wm8750_out_flush(s);
}

uint32_t wm8750_adc_dat(void *opaque)
{
    struct wm8750_s *s = (struct wm8750_s *) opaque;
    uint32_t *data;
    if (s->idx_in >= sizeof(s->data_in))
        wm8750_in_load(s);
    data = (uint32_t *) &s->data_in[s->idx_in];
    s->req_in -= 4;
    s->idx_in += 4;
    return *data & s->inmask;
}