emupcm.c

是关于linux2.5.1的完全源码

	emu10k1_t *emu = snd_pcm_substream_chip(substream);
	emu10k1_pcm_t *epcm;
	emu10k1_pcm_mixer_t *mix;
	snd_pcm_runtime_t *runtime = substream->runtime;
	int i, err;

	epcm = snd_magic_kcalloc(emu10k1_pcm_t, 0, GFP_KERNEL);
	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = emu;
	epcm->type = PLAYBACK_EMUVOICE;
	epcm->substream = substream;
	runtime->private_data = epcm;
	runtime->private_free = snd_emu10k1_pcm_free_substream;
	runtime->hw = snd_emu10k1_playback;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) {
		snd_magic_kfree(epcm);
		return err;
	}
	if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) {
		snd_magic_kfree(epcm);
		return err;
	}
	mix = &emu->pcm_mixer[substream->number];
	for (i = 0; i < 4; i++)
		mix->send_routing[0][i] = mix->send_routing[1][i] = mix->send_routing[2][i] = i;
	memset(&mix->send_volume, 0, sizeof(mix->send_volume));
	mix->send_volume[0][0] = mix->send_volume[0][1] =
	mix->send_volume[1][0] = mix->send_volume[2][1] = 255;
	mix->attn[0] = mix->attn[1] = mix->attn[2] = 0xffff;
	mix->epcm = epcm;
	snd_emu10k1_pcm_mixer_notify(emu->card, mix, 1);
	return 0;
}

static int snd_emu10k1_playback_close(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);
	emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[substream->number];

	mix->epcm = NULL;
	snd_emu10k1_pcm_mixer_notify(emu->card, mix, 0);
	return 0;
}

static int snd_emu10k1_capture_open(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	emu10k1_pcm_t *epcm;

	epcm = snd_magic_kcalloc(emu10k1_pcm_t, 0, GFP_KERNEL);
	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = emu;
	epcm->type = CAPTURE_AC97ADC;
	epcm->substream = substream;
	epcm->capture_ipr = IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL;
	epcm->capture_inte = INTE_ADCBUFENABLE;
	epcm->capture_ba_reg = ADCBA;
	epcm->capture_bs_reg = ADCBS;
	epcm->capture_idx_reg = emu->audigy ? A_ADCIDX : ADCIDX;
	runtime->private_data = epcm;
	runtime->private_free = snd_emu10k1_pcm_free_substream;
	runtime->hw = snd_emu10k1_capture;
	emu->capture_interrupt = snd_emu10k1_pcm_ac97adc_interrupt;
	emu->pcm_capture_substream = substream;
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_capture_rates);
	return 0;
}

static int snd_emu10k1_capture_close(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);

	emu->capture_interrupt = NULL;
	emu->pcm_capture_substream = NULL;
	return 0;
}

static int snd_emu10k1_capture_mic_open(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);
	emu10k1_pcm_t *epcm;
	snd_pcm_runtime_t *runtime = substream->runtime;

	epcm = snd_magic_kcalloc(emu10k1_pcm_t, 0, GFP_KERNEL);
	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = emu;
	epcm->type = CAPTURE_AC97MIC;
	epcm->substream = substream;
	epcm->capture_ipr = IPR_MICBUFFULL|IPR_MICBUFHALFFULL;
	epcm->capture_inte = INTE_MICBUFENABLE;
	epcm->capture_ba_reg = MICBA;
	epcm->capture_bs_reg = MICBS;
	epcm->capture_idx_reg = MICIDX;
	substream->runtime->private_data = epcm;
	substream->runtime->private_free = snd_emu10k1_pcm_free_substream;
	runtime->hw = snd_emu10k1_capture;
	runtime->hw.rates = SNDRV_PCM_RATE_8000;
	runtime->hw.rate_min = runtime->hw.rate_max = 8000;
	runtime->hw.channels_min = 1;
	emu->capture_mic_interrupt = snd_emu10k1_pcm_ac97mic_interrupt;
	emu->pcm_capture_mic_substream = substream;
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
	return 0;
}

static int snd_emu10k1_capture_mic_close(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);

	emu->capture_interrupt = NULL;
	emu->pcm_capture_mic_substream = NULL;
	return 0;
}

static int snd_emu10k1_capture_efx_open(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);
	emu10k1_pcm_t *epcm;
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned long flags;
	int nefx = emu->audigy ? 64 : 32;
	int idx;

	epcm = snd_magic_kcalloc(emu10k1_pcm_t, 0, GFP_KERNEL);
	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = emu;
	epcm->type = CAPTURE_EFX;
	epcm->substream = substream;
	epcm->capture_ipr = IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL;
	epcm->capture_inte = INTE_EFXBUFENABLE;
	epcm->capture_ba_reg = FXBA;
	epcm->capture_bs_reg = FXBS;
	epcm->capture_idx_reg = FXIDX;
	substream->runtime->private_data = epcm;
	substream->runtime->private_free = snd_emu10k1_pcm_free_substream;
	runtime->hw = snd_emu10k1_capture;
	runtime->hw.rates = SNDRV_PCM_RATE_48000;
	runtime->hw.rate_min = runtime->hw.rate_max = 48000;
	spin_lock_irqsave(&emu->reg_lock, flags);
	runtime->hw.channels_min = runtime->hw.channels_max = 0;
	for (idx = 0; idx < nefx; idx++) {
		if (emu->efx_voices_mask[idx/32] & (1 << (idx%32))) {
			runtime->hw.channels_min++;
			runtime->hw.channels_max++;
		}
	}
	epcm->capture_cr_val = emu->efx_voices_mask[0];
	epcm->capture_cr_val2 = emu->efx_voices_mask[1];
	spin_unlock_irqrestore(&emu->reg_lock, flags);
	emu->capture_efx_interrupt = snd_emu10k1_pcm_efx_interrupt;
	emu->pcm_capture_efx_substream = substream;
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
	return 0;
}

static int snd_emu10k1_capture_efx_close(snd_pcm_substream_t * substream)
{
	emu10k1_t *emu = snd_pcm_substream_chip(substream);

	emu->capture_interrupt = NULL;
	emu->pcm_capture_efx_substream = NULL;
	return 0;
}

static snd_pcm_ops_t snd_emu10k1_playback_ops = {
	open:			snd_emu10k1_playback_open,
	close:			snd_emu10k1_playback_close,
	ioctl:			snd_pcm_lib_ioctl,
	hw_params:		snd_emu10k1_playback_hw_params,
	hw_free:		snd_emu10k1_playback_hw_free,
	prepare:		snd_emu10k1_playback_prepare,
	trigger:		snd_emu10k1_playback_trigger,
	pointer:		snd_emu10k1_playback_pointer,
};

static snd_pcm_ops_t snd_emu10k1_capture_ops = {
	open:			snd_emu10k1_capture_open,
	close:			snd_emu10k1_capture_close,
	ioctl:			snd_pcm_lib_ioctl,
	hw_params:		snd_emu10k1_capture_hw_params,
	hw_free:		snd_emu10k1_capture_hw_free,
	prepare:		snd_emu10k1_capture_prepare,
	trigger:		snd_emu10k1_capture_trigger,
	pointer:		snd_emu10k1_capture_pointer,
};

static void snd_emu10k1_pcm_free(snd_pcm_t *pcm)
{
	emu10k1_t *emu = snd_magic_cast(emu10k1_t, pcm->private_data, return);
	emu->pcm = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

int __devinit snd_emu10k1_pcm(emu10k1_t * emu, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(emu->card, "emu10k1", device, 32, 1, &pcm)) < 0)
		return err;

	pcm->private_data = emu;
	pcm->private_free = snd_emu10k1_pcm_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_emu10k1_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_emu10k1_capture_ops);

	pcm->info_flags = 0;
	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
	strcpy(pcm->name, "EMU10K1");
	emu->pcm = pcm;

	snd_pcm_lib_preallocate_pci_pages_for_all(emu->pci, pcm, 64*1024, 128*1024);

	if (rpcm)
		*rpcm = pcm;

	return 0;
}

static snd_pcm_ops_t snd_emu10k1_capture_mic_ops = {
	open:			snd_emu10k1_capture_mic_open,
	close:			snd_emu10k1_capture_mic_close,
	ioctl:			snd_pcm_lib_ioctl,
	hw_params:		snd_emu10k1_capture_hw_params,
	hw_free:		snd_emu10k1_capture_hw_free,
	prepare:		snd_emu10k1_capture_prepare,
	trigger:		snd_emu10k1_capture_trigger,
	pointer:		snd_emu10k1_capture_pointer,
};

static void snd_emu10k1_pcm_mic_free(snd_pcm_t *pcm)
{
	emu10k1_t *emu = snd_magic_cast(emu10k1_t, pcm->private_data, return);
	emu->pcm_mic = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

int __devinit snd_emu10k1_pcm_mic(emu10k1_t * emu, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(emu->card, "emu10k1 mic", device, 0, 1, &pcm)) < 0)
		return err;

	pcm->private_data = emu;
	pcm->private_free = snd_emu10k1_pcm_mic_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_emu10k1_capture_mic_ops);

	pcm->info_flags = 0;
	strcpy(pcm->name, "EMU10K1 MIC");
	emu->pcm_mic = pcm;

	snd_pcm_lib_preallocate_pci_pages_for_all(emu->pci, pcm, 64*1024, 64*1024);

	if (rpcm)
		*rpcm = pcm;
	return 0;
}

static int snd_emu10k1_pcm_efx_voices_mask_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
	int nefx = emu->audigy ? 64 : 32;
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = nefx;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int snd_emu10k1_pcm_efx_voices_mask_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int nefx = emu->audigy ? 64 : 32;
	int idx;
	
	spin_lock_irqsave(&emu->reg_lock, flags);
	for (idx = 0; idx < nefx; idx++)
		ucontrol->value.integer.value[idx] = (emu->efx_voices_mask[idx / 32] & (1 << (idx % 32))) ? 1 : 0;
	spin_unlock_irqrestore(&emu->reg_lock, flags);
	return 0;
}

static int snd_emu10k1_pcm_efx_voices_mask_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned int nval[2], bits;
	int nefx = emu->audigy ? 64 : 32;
	int change, idx;
	
	nval[0] = nval[1] = 0;
	for (idx = 0, bits = 0; idx < nefx; idx++)
		if (ucontrol->value.integer.value[idx]) {
			nval[idx / 32] |= 1 << (idx % 32);
			bits++;
		}
	if (bits != 1 && bits != 2 && bits != 4 && bits != 8)
		return -EINVAL;
	spin_lock_irqsave(&emu->reg_lock, flags);
	change = (nval[0] != emu->efx_voices_mask[0]) ||
		(nval[1] != emu->efx_voices_mask[1]);
	emu->efx_voices_mask[0] = nval[0];
	emu->efx_voices_mask[1] = nval[1];
	spin_unlock_irqrestore(&emu->reg_lock, flags);
	return change;
}

static snd_kcontrol_new_t snd_emu10k1_pcm_efx_voices_mask = {
	iface: SNDRV_CTL_ELEM_IFACE_PCM,
	name: "EFX voices mask",
	info: snd_emu10k1_pcm_efx_voices_mask_info,
	get: snd_emu10k1_pcm_efx_voices_mask_get,
	put: snd_emu10k1_pcm_efx_voices_mask_put
};

static snd_pcm_ops_t snd_emu10k1_capture_efx_ops = {
	open:			snd_emu10k1_capture_efx_open,
	close:			snd_emu10k1_capture_efx_close,
	ioctl:			snd_pcm_lib_ioctl,
	hw_params:		snd_emu10k1_capture_hw_params,
	hw_free:		snd_emu10k1_capture_hw_free,
	prepare:		snd_emu10k1_capture_prepare,
	trigger:		snd_emu10k1_capture_trigger,
	pointer:		snd_emu10k1_capture_pointer,
};

static void snd_emu10k1_pcm_efx_free(snd_pcm_t *pcm)
{
	emu10k1_t *emu = snd_magic_cast(emu10k1_t, pcm->private_data, return);
	emu->pcm_efx = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

int __devinit snd_emu10k1_pcm_efx(emu10k1_t * emu, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(emu->card, "emu10k1 efx", device, 0, 1, &pcm)) < 0)
		return err;

	pcm->private_data = emu;
	pcm->private_free = snd_emu10k1_pcm_efx_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_emu10k1_capture_efx_ops);

	pcm->info_flags = 0;
	strcpy(pcm->name, "EMU10K1 EFX");
	emu->pcm_efx = pcm;
	if (rpcm)
		*rpcm = pcm;

	emu->efx_voices_mask[0] = FXWC_DEFAULTROUTE_C | FXWC_DEFAULTROUTE_A;
	emu->efx_voices_mask[1] = 0;
	snd_ctl_add(emu->card, snd_ctl_new1(&snd_emu10k1_pcm_efx_voices_mask, emu));

	snd_pcm_lib_preallocate_pci_pages_for_all(emu->pci, pcm, 64*1024, 64*1024);

	return 0;
}