Commit 7b47c0d7 authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
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ALSA: firewire-motu: refactoring protocol v3 for clock source getter 



This commit splits the method to get clock source for protocol
version 3 so that model-dependent operations are explicitly defined.

Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200519111641.123211-14-o-takashi@sakamocchi.jp


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 2b8f050e

sound/firewire/motu/motu-protocol-v3.c

+72 −26
Original line number Diff line number Diff line
@@ -87,54 +87,100 @@ int snd_motu_protocol_v3_set_clock_rate(struct snd_motu *motu, 
	return 0;

}



int snd_motu_protocol_v3_get_clock_source(struct snd_motu *motu,

static int detect_clock_source_828mk3(struct snd_motu *motu, u32 data,

				      enum snd_motu_clock_source *src)

{

	__be32 reg;

	u32 data;

	unsigned int val;

	int err;



	err = snd_motu_transaction_read(motu, V3_CLOCK_STATUS_OFFSET, &reg,

					sizeof(reg));

	if (err < 0)

		return err;

	data = be32_to_cpu(reg);



	val = data & V3_CLOCK_SOURCE_MASK;

	if (val == 0x00) {

	switch (data) {

	case 0x00:

		*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;

	} else if (val == 0x01) {

		break;

	case 0x01:

		*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;

	} else if (val == 0x02) {

		break;

	case 0x02:

		*src = SND_MOTU_CLOCK_SOURCE_SPH;

	} else if (val == 0x10) {

		break;

	case 0x10:

		*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;

	} else if (val == 0x18 || val == 0x19) {

		err = snd_motu_transaction_read(motu, V3_OPT_IFACE_MODE_OFFSET,

						&reg, sizeof(reg));

		break;

	case 0x18:

	case 0x19:

	{

		__be32 reg;

		u32 options;

		int err;



		err = snd_motu_transaction_read(motu,

				V3_OPT_IFACE_MODE_OFFSET, &reg, sizeof(reg));

		if (err < 0)

			return err;

		data = be32_to_cpu(reg);

		options = be32_to_cpu(reg);



		if (val == 0x18) {

			if (data & V3_NO_ADAT_OPT_IN_IFACE_A)

		if (data == 0x18) {

			if (options & V3_NO_ADAT_OPT_IN_IFACE_A)

				*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A;

			else

				*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A;

		} else {

			if (data & V3_NO_ADAT_OPT_IN_IFACE_B)

			if (options & V3_NO_ADAT_OPT_IN_IFACE_B)

				*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B;

			else

				*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B;

		}

	} else {



		break;

	}

	default:

		*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;

		break;

	}



	return 0;

}



static int v3_detect_clock_source(struct snd_motu *motu, u32 data,

				  enum snd_motu_clock_source *src)

{

	switch (data) {

	case 0x00:

		*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;

		break;

	case 0x01:

		*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;

		break;

	case 0x02:

		*src = SND_MOTU_CLOCK_SOURCE_SPH;

		break;

	case 0x10:

		*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;

		break;

	default:

		*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;

		break;

	}



	return 0;

}



int snd_motu_protocol_v3_get_clock_source(struct snd_motu *motu,

					  enum snd_motu_clock_source *src)

{

	__be32 reg;

	u32 data;

	int err;



	err = snd_motu_transaction_read(motu, V3_CLOCK_STATUS_OFFSET, &reg,

					sizeof(reg));

	if (err < 0)

		return err;

	data = be32_to_cpu(reg) & V3_CLOCK_SOURCE_MASK;



	if (motu->spec == &snd_motu_spec_828mk3)

		return detect_clock_source_828mk3(motu, data, src);

	else

		return v3_detect_clock_source(motu, data, src);

}



int snd_motu_protocol_v3_switch_fetching_mode(struct snd_motu *motu,

					      bool enable)

{