13 files changed, 937 insertions, 240 deletions

diff --git a/sound/firewire/dice/Makefile b/sound/firewire/dice/Makefile
index 55b4be9b0034..7b7997a5754c 100644
--- a/sound/firewire/dice/Makefile
+++ b/sound/firewire/dice/Makefile
@@ -1,3 +1,4 @@
 snd-dice-objs := dice-transaction.o dice-stream.o dice-proc.o dice-midi.o \
-		 dice-pcm.o dice-hwdep.o dice.o
+		 dice-pcm.o dice-hwdep.o dice.o dice-tcelectronic.o \
+		 dice-alesis.o dice-extension.o
 obj-$(CONFIG_SND_DICE) += snd-dice.o
diff --git a/sound/firewire/dice/dice-alesis.c b/sound/firewire/dice/dice-alesis.c
new file mode 100644
index 000000000000..b2efb1c71a98
--- /dev/null
+++ b/sound/firewire/dice/dice-alesis.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dice-alesis.c - a part of driver for DICE based devices
+ *
+ * Copyright (c) 2018 Takashi Sakamoto
+ */
+
+#include "dice.h"
+
+static const unsigned int
+alesis_io14_tx_pcm_chs[MAX_STREAMS][SND_DICE_RATE_MODE_COUNT] = {
+	{6, 6, 4},	/* Tx0 = Analog + S/PDIF. */
+	{8, 4, 0},	/* Tx1 = ADAT1. */
+};
+
+static const unsigned int
+alesis_io26_tx_pcm_chs[MAX_STREAMS][SND_DICE_RATE_MODE_COUNT] = {
+	{10, 10, 8},	/* Tx0 = Analog + S/PDIF. */
+	{16, 8, 0},	/* Tx1 = ADAT1 + ADAT2. */
+};
+
+int snd_dice_detect_alesis_formats(struct snd_dice *dice)
+{
+	__be32 reg;
+	u32 data;
+	int i;
+	int err;
+
+	err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO, &reg,
+					   sizeof(reg));
+	if (err < 0)
+		return err;
+	data = be32_to_cpu(reg);
+
+	if (data == 4 || data == 6) {
+		memcpy(dice->tx_pcm_chs, alesis_io14_tx_pcm_chs,
+				MAX_STREAMS * SND_DICE_RATE_MODE_COUNT *
+				sizeof(unsigned int));
+	} else {
+		memcpy(dice->rx_pcm_chs, alesis_io26_tx_pcm_chs,
+				MAX_STREAMS * SND_DICE_RATE_MODE_COUNT *
+				sizeof(unsigned int));
+	}
+
+	for (i = 0; i < SND_DICE_RATE_MODE_COUNT; ++i)
+		dice->rx_pcm_chs[0][i] = 8;
+
+	dice->tx_midi_ports[0] = 1;
+	dice->rx_midi_ports[0] = 1;
+
+	return 0;
+}
diff --git a/sound/firewire/dice/dice-extension.c b/sound/firewire/dice/dice-extension.c
new file mode 100644
index 000000000000..a63fcbc875ad
--- /dev/null
+++ b/sound/firewire/dice/dice-extension.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dice-extension.c - a part of driver for DICE based devices
+ *
+ * Copyright (c) 2018 Takashi Sakamoto
+ */
+
+#include "dice.h"
+
+/* For TCD2210/2220, TCAT defines extension of application protocol. */
+
+#define DICE_EXT_APP_SPACE		0xffffe0200000uLL
+
+#define DICE_EXT_APP_CAPS_OFFSET	0x00
+#define DICE_EXT_APP_CAPS_SIZE		0x04
+#define DICE_EXT_APP_CMD_OFFSET		0x08
+#define DICE_EXT_APP_CMD_SIZE		0x0c
+#define DICE_EXT_APP_MIXER_OFFSET	0x10
+#define DICE_EXT_APP_MIXER_SIZE		0x14
+#define DICE_EXT_APP_PEAK_OFFSET	0x18
+#define DICE_EXT_APP_PEAK_SIZE		0x1c
+#define DICE_EXT_APP_ROUTER_OFFSET	0x20
+#define DICE_EXT_APP_ROUTER_SIZE	0x24
+#define DICE_EXT_APP_STREAM_OFFSET	0x28
+#define DICE_EXT_APP_STREAM_SIZE	0x2c
+#define DICE_EXT_APP_CURRENT_OFFSET	0x30
+#define DICE_EXT_APP_CURRENT_SIZE	0x34
+#define DICE_EXT_APP_STANDALONE_OFFSET	0x38
+#define DICE_EXT_APP_STANDALONE_SIZE	0x3c
+#define DICE_EXT_APP_APPLICATION_OFFSET	0x40
+#define DICE_EXT_APP_APPLICATION_SIZE	0x44
+
+#define EXT_APP_STREAM_TX_NUMBER	0x0000
+#define EXT_APP_STREAM_RX_NUMBER	0x0004
+#define EXT_APP_STREAM_ENTRIES		0x0008
+#define EXT_APP_STREAM_ENTRY_SIZE	0x010c
+#define  EXT_APP_NUMBER_AUDIO		0x0000
+#define  EXT_APP_NUMBER_MIDI		0x0004
+#define  EXT_APP_NAMES			0x0008
+#define   EXT_APP_NAMES_SIZE		256
+#define  EXT_APP_AC3			0x0108
+
+#define EXT_APP_CONFIG_LOW_ROUTER	0x0000
+#define EXT_APP_CONFIG_LOW_STREAM	0x1000
+#define EXT_APP_CONFIG_MIDDLE_ROUTER	0x2000
+#define EXT_APP_CONFIG_MIDDLE_STREAM	0x3000
+#define EXT_APP_CONFIG_HIGH_ROUTER	0x4000
+#define EXT_APP_CONFIG_HIGH_STREAM	0x5000
+
+static inline int read_transaction(struct snd_dice *dice, u64 section_addr,
+				   u32 offset, void *buf, size_t len)
+{
+	return snd_fw_transaction(dice->unit,
+				  len == 4 ? TCODE_READ_QUADLET_REQUEST :
+					     TCODE_READ_BLOCK_REQUEST,
+				  section_addr + offset, buf, len, 0);
+}
+
+static int read_stream_entries(struct snd_dice *dice, u64 section_addr,
+			       u32 base_offset, unsigned int stream_count,
+			       unsigned int mode,
+			       unsigned int pcm_channels[MAX_STREAMS][3],
+			       unsigned int midi_ports[MAX_STREAMS])
+{
+	u32 entry_offset;
+	__be32 reg[2];
+	int err;
+	int i;
+
+	for (i = 0; i < stream_count; ++i) {
+		entry_offset = base_offset + i * EXT_APP_STREAM_ENTRY_SIZE;
+		err = read_transaction(dice, section_addr,
+				    entry_offset + EXT_APP_NUMBER_AUDIO,
+				    reg, sizeof(reg));
+		if (err < 0)
+			return err;
+		pcm_channels[i][mode] = be32_to_cpu(reg[0]);
+		midi_ports[i] = max(midi_ports[i], be32_to_cpu(reg[1]));
+	}
+
+	return 0;
+}
+
+static int detect_stream_formats(struct snd_dice *dice, u64 section_addr)
+{
+	u32 base_offset;
+	__be32 reg[2];
+	unsigned int stream_count;
+	int mode;
+	int err = 0;
+
+	for (mode = 0; mode < SND_DICE_RATE_MODE_COUNT; ++mode) {
+		unsigned int cap;
+
+		/*
+		 * Some models report stream formats at highest mode, however
+		 * they don't support the mode. Check clock capabilities.
+		 */
+		if (mode == 2) {
+			cap = CLOCK_CAP_RATE_176400 | CLOCK_CAP_RATE_192000;
+		} else if (mode == 1) {
+			cap = CLOCK_CAP_RATE_88200 | CLOCK_CAP_RATE_96000;
+		} else {
+			cap = CLOCK_CAP_RATE_32000 | CLOCK_CAP_RATE_44100 |
+			      CLOCK_CAP_RATE_48000;
+		}
+		if (!(cap & dice->clock_caps))
+			continue;
+
+		base_offset = 0x2000 * mode + 0x1000;
+
+		err = read_transaction(dice, section_addr,
+				       base_offset + EXT_APP_STREAM_TX_NUMBER,
+				       &reg, sizeof(reg));
+		if (err < 0)
+			break;
+
+		base_offset += EXT_APP_STREAM_ENTRIES;
+		stream_count = be32_to_cpu(reg[0]);
+		err = read_stream_entries(dice, section_addr, base_offset,
+					  stream_count, mode,
+					  dice->tx_pcm_chs,
+					  dice->tx_midi_ports);
+		if (err < 0)
+			break;
+
+		base_offset += stream_count * EXT_APP_STREAM_ENTRY_SIZE;
+		stream_count = be32_to_cpu(reg[1]);
+		err = read_stream_entries(dice, section_addr, base_offset,
+					  stream_count,
+					  mode, dice->rx_pcm_chs,
+					  dice->rx_midi_ports);
+		if (err < 0)
+			break;
+	}
+
+	return err;
+}
+
+int snd_dice_detect_extension_formats(struct snd_dice *dice)
+{
+	__be32 *pointers;
+	unsigned int i;
+	u64 section_addr;
+	int err;
+
+	pointers = kmalloc_array(9, sizeof(__be32) * 2, GFP_KERNEL);
+	if (pointers == NULL)
+		return -ENOMEM;
+
+	err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST,
+				 DICE_EXT_APP_SPACE, pointers,
+				 9 * sizeof(__be32) * 2, 0);
+	if (err < 0)
+		goto end;
+
+	/* Check two of them for offset have the same value or not. */
+	for (i = 0; i < 9; ++i) {
+		int j;
+
+		for (j = i + 1; j < 9; ++j) {
+			if (pointers[i * 2] == pointers[j * 2])
+				goto end;
+		}
+	}
+
+	section_addr = DICE_EXT_APP_SPACE + be32_to_cpu(pointers[12]) * 4;
+	err = detect_stream_formats(dice, section_addr);
+end:
+	kfree(pointers);
+	return err;
+}
diff --git a/sound/firewire/dice/dice-interface.h b/sound/firewire/dice/dice-interface.h
index 15a484b05298..9cad3d608229 100644
--- a/sound/firewire/dice/dice-interface.h
+++ b/sound/firewire/dice/dice-interface.h
@@ -175,13 +175,18 @@
 #define GLOBAL_SAMPLE_RATE		0x05c
 
 /*
+ * Some old firmware versions do not have the following global registers.
+ * Windows drivers produced by TCAT lost backward compatibility in its
+ * early release because they can handle firmware only which supports the
+ * following registers.
+ */
+
+/*
  * The version of the DICE driver specification that this device conforms to;
  * read-only.
  */
 #define GLOBAL_VERSION			0x060
 
-/* Some old firmware versions do not have the following global registers: */
-
 /*
  * Supported sample rates and clock sources; read-only.
  */
diff --git a/sound/firewire/dice/dice-midi.c b/sound/firewire/dice/dice-midi.c
index 8ff6da3c51f7..84eca8a51a02 100644
--- a/sound/firewire/dice/dice-midi.c
+++ b/sound/firewire/dice/dice-midi.c
@@ -101,27 +101,18 @@ int snd_dice_create_midi(struct snd_dice *dice)
 		.close		= midi_close,
 		.trigger	= midi_playback_trigger,
 	};
-	__be32 reg;
 	struct snd_rawmidi *rmidi;
 	struct snd_rawmidi_str *str;
 	unsigned int midi_in_ports, midi_out_ports;
+	int i;
 	int err;
 
-	/*
-	 * Use the number of MIDI conformant data channel at current sampling
-	 * transfer frequency.
-	 */
-	err = snd_dice_transaction_read_tx(dice, TX_NUMBER_MIDI,
-					   &reg, sizeof(reg));
-	if (err < 0)
-		return err;
-	midi_in_ports = be32_to_cpu(reg);
-
-	err = snd_dice_transaction_read_rx(dice, RX_NUMBER_MIDI,
-					   &reg, sizeof(reg));
-	if (err < 0)
-		return err;
-	midi_out_ports = be32_to_cpu(reg);
+	midi_in_ports = 0;
+	midi_out_ports = 0;
+	for (i = 0; i < MAX_STREAMS; ++i) {
+		midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]);
+		midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]);
+	}
 
 	if (midi_in_ports + midi_out_ports == 0)
 		return 0;
diff --git a/sound/firewire/dice/dice-pcm.c b/sound/firewire/dice/dice-pcm.c
index 7cb9e9713ac3..80351b29fe0d 100644
--- a/sound/firewire/dice/dice-pcm.c
+++ b/sound/firewire/dice/dice-pcm.c
@@ -9,43 +9,115 @@
 
 #include "dice.h"
 
+static int dice_rate_constraint(struct snd_pcm_hw_params *params,
+				struct snd_pcm_hw_rule *rule)
+{
+	struct snd_pcm_substream *substream = rule->private;
+	struct snd_dice *dice = substream->private_data;
+	unsigned int index = substream->pcm->device;
+
+	const struct snd_interval *c =
+		hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval *r =
+		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval rates = {
+		.min = UINT_MAX, .max = 0, .integer = 1
+	};
+	unsigned int *pcm_channels;
+	enum snd_dice_rate_mode mode;
+	unsigned int i, rate;
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		pcm_channels = dice->tx_pcm_chs[index];
+	else
+		pcm_channels = dice->rx_pcm_chs[index];
+
+	for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
+		rate = snd_dice_rates[i];
+		if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
+			continue;
+
+		if (!snd_interval_test(c, pcm_channels[mode]))
+			continue;
+
+		rates.min = min(rates.min, rate);
+		rates.max = max(rates.max, rate);
+	}
+
+	return snd_interval_refine(r, &rates);
+}
+
+static int dice_channels_constraint(struct snd_pcm_hw_params *params,
+				    struct snd_pcm_hw_rule *rule)
+{
+	struct snd_pcm_substream *substream = rule->private;
+	struct snd_dice *dice = substream->private_data;
+	unsigned int index = substream->pcm->device;
+
+	const struct snd_interval *r =
+		hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *c =
+		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval channels = {
+		.min = UINT_MAX, .max = 0, .integer = 1
+	};
+	unsigned int *pcm_channels;
+	enum snd_dice_rate_mode mode;
+	unsigned int i, rate;
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		pcm_channels = dice->tx_pcm_chs[index];
+	else
+		pcm_channels = dice->rx_pcm_chs[index];
+
+	for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
+		rate = snd_dice_rates[i];
+		if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
+			continue;
+
+		if (!snd_interval_test(r, rate))
+			continue;
+
+		channels.min = min(channels.min, pcm_channels[mode]);
+		channels.max = max(channels.max, pcm_channels[mode]);
+	}
+
+	return snd_interval_refine(c, &channels);
+}
+
 static int limit_channels_and_rates(struct snd_dice *dice,
 				    struct snd_pcm_runtime *runtime,
 				    enum amdtp_stream_direction dir,
-				    unsigned int index, unsigned int size)
+				    unsigned int index)
 {
 	struct snd_pcm_hardware *hw = &runtime->hw;
-	struct amdtp_stream *stream;
-	unsigned int rate;
-	__be32 reg;
-	int err;
-
-	/*
-	 * Retrieve current Multi Bit Linear Audio data channel and limit to
-	 * it.
-	 */
-	if (dir == AMDTP_IN_STREAM) {
-		stream = &dice->tx_stream[index];
-		err = snd_dice_transaction_read_tx(dice,
-				size * index + TX_NUMBER_AUDIO,
-				&reg, sizeof(reg));
-	} else {
-		stream = &dice->rx_stream[index];
-		err = snd_dice_transaction_read_rx(dice,
-				size * index + RX_NUMBER_AUDIO,
-				&reg, sizeof(reg));
+	unsigned int *pcm_channels;
+	unsigned int i;
+
+	if (dir == AMDTP_IN_STREAM)
+		pcm_channels = dice->tx_pcm_chs[index];
+	else
+		pcm_channels = dice->rx_pcm_chs[index];
+
+	hw->channels_min = UINT_MAX;
+	hw->channels_max = 0;
+
+	for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
+		enum snd_dice_rate_mode mode;
+		unsigned int rate, channels;
+
+		rate = snd_dice_rates[i];
+		if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
+			continue;
+		hw->rates |= snd_pcm_rate_to_rate_bit(rate);
+
+		channels = pcm_channels[mode];
+		if (channels == 0)
+			continue;
+		hw->channels_min = min(hw->channels_min, channels);
+		hw->channels_max = max(hw->channels_max, channels);
 	}
-	if (err < 0)
-		return err;
 
-	hw->channels_min = hw->channels_max = be32_to_cpu(reg);
-
-	/* Retrieve current sampling transfer frequency and limit to it. */
-	err = snd_dice_transaction_get_rate(dice, &rate);
-	if (err < 0)
-		return err;
-
-	hw->rates = snd_pcm_rate_to_rate_bit(rate);
 	snd_pcm_limit_hw_rates(runtime);
 
 	return 0;
@@ -56,36 +128,34 @@ static int init_hw_info(struct snd_dice *dice,
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_pcm_hardware *hw = &runtime->hw;
+	unsigned int index = substream->pcm->device;
 	enum amdtp_stream_direction dir;
 	struct amdtp_stream *stream;
-	__be32 reg[2];
-	unsigned int count, size;
 	int err;
 
 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 		hw->formats = AM824_IN_PCM_FORMAT_BITS;
 		dir = AMDTP_IN_STREAM;
-		stream = &dice->tx_stream[substream->pcm->device];
-		err = snd_dice_transaction_read_tx(dice, TX_NUMBER, reg,
-						   sizeof(reg));
+		stream = &dice->tx_stream[index];
 	} else {
 		hw->formats = AM824_OUT_PCM_FORMAT_BITS;
 		dir = AMDTP_OUT_STREAM;
-		stream = &dice->rx_stream[substream->pcm->device];
-		err = snd_dice_transaction_read_rx(dice, RX_NUMBER, reg,
-						   sizeof(reg));
+		stream = &dice->rx_stream[index];
 	}
 
+	err = limit_channels_and_rates(dice, substream->runtime, dir,
+				       index);
 	if (err < 0)
 		return err;
 
-	count = min_t(unsigned int, be32_to_cpu(reg[0]), MAX_STREAMS);
-	if (substream->pcm->device >= count)
-		return -ENXIO;
-
-	size = be32_to_cpu(reg[1]) * 4;
-	err = limit_channels_and_rates(dice, substream->runtime, dir,
-				       substream->pcm->device, size);
+	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				  dice_rate_constraint, substream,
+				  SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+	if (err < 0)
+		return err;
+	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				  dice_channels_constraint, substream,
+				  SNDRV_PCM_HW_PARAM_RATE, -1);
 	if (err < 0)
 		return err;
 
@@ -95,6 +165,8 @@ static int init_hw_info(struct snd_dice *dice,
 static int pcm_open(struct snd_pcm_substream *substream)
 {
 	struct snd_dice *dice = substream->private_data;
+	unsigned int source;
+	bool internal;
 	int err;
 
 	err = snd_dice_stream_lock_try(dice);
@@ -105,6 +177,43 @@ static int pcm_open(struct snd_pcm_substream *substream)
 	if (err < 0)
 		goto err_locked;
 
+	err = snd_dice_transaction_get_clock_source(dice, &source);
+	if (err < 0)
+		goto err_locked;
+	switch (source) {
+	case CLOCK_SOURCE_AES1:
+	case CLOCK_SOURCE_AES2:
+	case CLOCK_SOURCE_AES3:
+	case CLOCK_SOURCE_AES4:
+	case CLOCK_SOURCE_AES_ANY:
+	case CLOCK_SOURCE_ADAT:
+	case CLOCK_SOURCE_TDIF:
+	case CLOCK_SOURCE_WC:
+		internal = false;
+		break;
+	default:
+		internal = true;
+		break;
+	}
+
+	/*
+	 * When source of clock is not internal or any PCM streams are running,
+	 * available sampling rate is limited at current sampling rate.
+	 */
+	if (!internal ||
+	    amdtp_stream_pcm_running(&dice->tx_stream[0]) ||
+	    amdtp_stream_pcm_running(&dice->tx_stream[1]) ||
+	    amdtp_stream_pcm_running(&dice->rx_stream[0]) ||
+	    amdtp_stream_pcm_running(&dice->rx_stream[1])) {
+		unsigned int rate;
+
+		err = snd_dice_transaction_get_rate(dice, &rate);
+		if (err < 0)
+			goto err_locked;
+		substream->runtime->hw.rate_min = rate;
+		substream->runtime->hw.rate_max = rate;
+	}
+
 	snd_pcm_set_sync(substream);
 end:
 	return err;
@@ -318,37 +427,19 @@ int snd_dice_create_pcm(struct snd_dice *dice)
 		.page      = snd_pcm_lib_get_vmalloc_page,
 		.mmap      = snd_pcm_lib_mmap_vmalloc,
 	};
-	__be32 reg;
 	struct snd_pcm *pcm;
-	unsigned int i, max_capture, max_playback, capture, playback;
+	unsigned int capture, playback;
+	int i, j;
 	int err;
 
-	/* Check whether PCM substreams are required. */
-	if (dice->force_two_pcms) {
-		max_capture = max_playback = 2;
-	} else {
-		max_capture = max_playback = 0;
-		err = snd_dice_transaction_read_tx(dice, TX_NUMBER, &reg,
-						   sizeof(reg));
-		if (err < 0)
-			return err;
-		max_capture = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
-
-		err = snd_dice_transaction_read_rx(dice, RX_NUMBER, &reg,
-						   sizeof(reg));
-		if (err < 0)
-			return err;
-		max_playback = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
-	}
-
 	for (i = 0; i < MAX_STREAMS; i++) {
 		capture = playback = 0;
-		if (i < max_capture)
-			capture = 1;
-		if (i < max_playback)
-			playback = 1;
-		if (capture == 0 && playback == 0)
-			break;
+		for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j) {
+			if (dice->tx_pcm_chs[i][j] > 0)
+				capture = 1;
+			if (dice->rx_pcm_chs[i][j] > 0)
+				playback = 1;
+		}
 
 		err = snd_pcm_new(dice->card, "DICE", i, playback, capture,
 				  &pcm);
diff --git a/sound/firewire/dice/dice-proc.c b/sound/firewire/dice/dice-proc.c
index f5c1d1bced59..faf8c854d256 100644
--- a/sound/firewire/dice/dice-proc.c
+++ b/sound/firewire/dice/dice-proc.c
@@ -148,12 +148,12 @@ static void dice_proc_read(struct snd_info_entry *entry,
 				   >> CLOCK_RATE_SHIFT));
 	snd_iprintf(buffer, "  ext status: %08x\n", buf.global.extended_status);
 	snd_iprintf(buffer, "  sample rate: %u\n", buf.global.sample_rate);
-	snd_iprintf(buffer, "  version: %u.%u.%u.%u\n",
-		    (buf.global.version >> 24) & 0xff,
-		    (buf.global.version >> 16) & 0xff,
-		    (buf.global.version >>  8) & 0xff,
-		    (buf.global.version >>  0) & 0xff);
 	if (quadlets >= 90) {
+		snd_iprintf(buffer, "  version: %u.%u.%u.%u\n",
+			    (buf.global.version >> 24) & 0xff,
+			    (buf.global.version >> 16) & 0xff,
+			    (buf.global.version >>  8) & 0xff,
+			    (buf.global.version >>  0) & 0xff);
 		snd_iprintf(buffer, "  clock caps:");
 		for (i = 0; i <= 6; ++i)
 			if (buf.global.clock_caps & (1 << i))
@@ -243,10 +243,74 @@ static void dice_proc_read(struct snd_info_entry *entry,
 	}
 }
 
-void snd_dice_create_proc(struct snd_dice *dice)
+static void dice_proc_read_formation(struct snd_info_entry *entry,
+				     struct snd_info_buffer *buffer)
+{
+	static const char *const rate_labels[] = {
+		[SND_DICE_RATE_MODE_LOW]	= "low",
+		[SND_DICE_RATE_MODE_MIDDLE]	= "middle",
+		[SND_DICE_RATE_MODE_HIGH]	= "high",
+	};
+	struct snd_dice *dice = entry->private_data;
+	int i, j;
+
+	snd_iprintf(buffer, "Output stream from unit:\n");
+	for (i = 0; i < SND_DICE_RATE_MODE_COUNT; ++i)
+		snd_iprintf(buffer, "\t%s", rate_labels[i]);
+	snd_iprintf(buffer, "\tMIDI\n");
+	for (i = 0; i < MAX_STREAMS; ++i) {
+		snd_iprintf(buffer, "Tx %u:", i);
+		for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j)
+			snd_iprintf(buffer, "\t%u", dice->tx_pcm_chs[i][j]);
+		snd_iprintf(buffer, "\t%u\n", dice->tx_midi_ports[i]);
+	}
+
+	snd_iprintf(buffer, "Input stream to unit:\n");
+	for (i = 0; i < SND_DICE_RATE_MODE_COUNT; ++i)
+		snd_iprintf(buffer, "\t%s", rate_labels[i]);
+	snd_iprintf(buffer, "\n");
+	for (i = 0; i < MAX_STREAMS; ++i) {
+		snd_iprintf(buffer, "Rx %u:", i);
+		for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j)
+			snd_iprintf(buffer, "\t%u", dice->rx_pcm_chs[i][j]);
+		snd_iprintf(buffer, "\t%u\n", dice->rx_midi_ports[i]);
+	}
+}
+
+static void add_node(struct snd_dice *dice, struct snd_info_entry *root,
+		     const char *name,
+		     void (*op)(struct snd_info_entry *entry,
+				struct snd_info_buffer *buffer))
 {
 	struct snd_info_entry *entry;
 
-	if (!snd_card_proc_new(dice->card, "dice", &entry))
-		snd_info_set_text_ops(entry, dice, dice_proc_read);
+	entry = snd_info_create_card_entry(dice->card, name, root);
+	if (!entry)
+		return;
+
+	snd_info_set_text_ops(entry, dice, op);
+	if (snd_info_register(entry) < 0)
+		snd_info_free_entry(entry);
+}
+
+void snd_dice_create_proc(struct snd_dice *dice)
+{
+	struct snd_info_entry *root;
+
+	/*
+	 * All nodes are automatically removed at snd_card_disconnect(),
+	 * by following to link list.
+	 */
+	root = snd_info_create_card_entry(dice->card, "firewire",
+					  dice->card->proc_root);
+	if (!root)
+		return;
+	root->mode = S_IFDIR | S_IRUGO | S_IXUGO;
+	if (snd_info_register(root) < 0) {
+		snd_info_free_entry(root);
+		return;
+	}
+
+	add_node(dice, root, "dice", dice_proc_read);
+	add_node(dice, root, "formation", dice_proc_read_formation);
 }
diff --git a/sound/firewire/dice/dice-stream.c b/sound/firewire/dice/dice-stream.c
index 928a255bfc35..c3c892c5c7ff 100644
--- a/sound/firewire/dice/dice-stream.c
+++ b/sound/firewire/dice/dice-stream.c
@@ -30,13 +30,43 @@ const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT] = {
 	[6] = 192000,
 };
 
+int snd_dice_stream_get_rate_mode(struct snd_dice *dice, unsigned int rate,
+				  enum snd_dice_rate_mode *mode)
+{
+	/* Corresponding to each entry in snd_dice_rates. */
+	static const enum snd_dice_rate_mode modes[] = {
+		[0] = SND_DICE_RATE_MODE_LOW,
+		[1] = SND_DICE_RATE_MODE_LOW,
+		[2] = SND_DICE_RATE_MODE_LOW,
+		[3] = SND_DICE_RATE_MODE_MIDDLE,
+		[4] = SND_DICE_RATE_MODE_MIDDLE,
+		[5] = SND_DICE_RATE_MODE_HIGH,
+		[6] = SND_DICE_RATE_MODE_HIGH,
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(snd_dice_rates); i++) {
+		if (!(dice->clock_caps & BIT(i)))
+			continue;
+		if (snd_dice_rates[i] != rate)
+			continue;
+
+		*mode = modes[i];
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
 /*
  * This operation has an effect to synchronize GLOBAL_STATUS/GLOBAL_SAMPLE_RATE
  * to GLOBAL_STATUS. Especially, just after powering on, these are different.
  */
-static int ensure_phase_lock(struct snd_dice *dice)
+static int ensure_phase_lock(struct snd_dice *dice, unsigned int rate)
 {
 	__be32 reg, nominal;
+	u32 data;
+	int i;
 	int err;
 
 	err = snd_dice_transaction_read_global(dice, GLOBAL_CLOCK_SELECT,
@@ -44,9 +74,21 @@ static int ensure_phase_lock(struct snd_dice *dice)
 	if (err < 0)
 		return err;
 
+	data = be32_to_cpu(reg);
+
+	data &= ~CLOCK_RATE_MASK;
+	for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
+		if (snd_dice_rates[i] == rate)
+			break;
+	}
+	if (i == ARRAY_SIZE(snd_dice_rates))
+		return -EINVAL;
+	data |= i << CLOCK_RATE_SHIFT;
+
 	if (completion_done(&dice->clock_accepted))
 		reinit_completion(&dice->clock_accepted);
 
+	reg = cpu_to_be32(data);
 	err = snd_dice_transaction_write_global(dice, GLOBAL_CLOCK_SELECT,
 						&reg, sizeof(reg));
 	if (err < 0)
@@ -192,6 +234,7 @@ static int start_streams(struct snd_dice *dice, enum amdtp_stream_direction dir,
 			 unsigned int rate, struct reg_params *params)
 {
 	__be32 reg[2];
+	enum snd_dice_rate_mode mode;
 	unsigned int i, pcm_chs, midi_ports;
 	struct amdtp_stream *streams;
 	struct fw_iso_resources *resources;
@@ -206,12 +249,23 @@ static int start_streams(struct snd_dice *dice, enum amdtp_stream_direction dir,
 		resources = dice->rx_resources;
 	}
 
+	err = snd_dice_stream_get_rate_mode(dice, rate, &mode);
+	if (err < 0)
+		return err;
+
 	for (i = 0; i < params->count; i++) {
+		unsigned int pcm_cache;
+		unsigned int midi_cache;
+
 		if (dir == AMDTP_IN_STREAM) {
+			pcm_cache = dice->tx_pcm_chs[i][mode];
+			midi_cache = dice->tx_midi_ports[i];
 			err = snd_dice_transaction_read_tx(dice,
 					params->size * i + TX_NUMBER_AUDIO,
 					reg, sizeof(reg));
 		} else {
+			pcm_cache = dice->rx_pcm_chs[i][mode];
+			midi_cache = dice->rx_midi_ports[i];
 			err = snd_dice_transaction_read_rx(dice,
 					params->size * i + RX_NUMBER_AUDIO,
 					reg, sizeof(reg));
@@ -221,6 +275,14 @@ static int start_streams(struct snd_dice *dice, enum amdtp_stream_direction dir,
 		pcm_chs = be32_to_cpu(reg[0]);
 		midi_ports = be32_to_cpu(reg[1]);
 
+		/* These are important for developer of this driver. */
+		if (pcm_chs != pcm_cache || midi_ports != midi_cache) {
+			dev_info(&dice->unit->device,
+				 "cache mismatch: pcm: %u:%u, midi: %u:%u\n",
+				 pcm_chs, pcm_cache, midi_ports, midi_cache);
+			return -EPROTO;
+		}
+
 		err = keep_resources(dice, dir, i, rate, pcm_chs, midi_ports);
 		if (err < 0)
 			return err;
@@ -256,6 +318,68 @@ static int start_streams(struct snd_dice *dice, enum amdtp_stream_direction dir,
 	return err;
 }
 
+static int start_duplex_streams(struct snd_dice *dice, unsigned int rate)
+{
+	struct reg_params tx_params, rx_params;
+	int i;
+	int err;
+
+	err = get_register_params(dice, &tx_params, &rx_params);
+	if (err < 0)
+		return err;
+
+	/* Stop transmission. */
+	stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
+	stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
+	snd_dice_transaction_clear_enable(dice);
+	release_resources(dice);
+
+	err = ensure_phase_lock(dice, rate);
+	if (err < 0) {
+		dev_err(&dice->unit->device, "fail to ensure phase lock\n");
+		return err;
+	}
+
+	/* Likely to have changed stream formats. */
+	err = get_register_params(dice, &tx_params, &rx_params);
+	if (err < 0)
+		return err;
+
+	/* Start both streams. */
+	err = start_streams(dice, AMDTP_IN_STREAM, rate, &tx_params);
+	if (err < 0)
+		goto error;
+	err = start_streams(dice, AMDTP_OUT_STREAM, rate, &rx_params);
+	if (err < 0)
+		goto error;
+
+	err = snd_dice_transaction_set_enable(dice);
+	if (err < 0) {
+		dev_err(&dice->unit->device, "fail to enable interface\n");
+		goto error;
+	}
+
+	for (i = 0; i < MAX_STREAMS; i++) {
+		if ((i < tx_params.count &&
+		    !amdtp_stream_wait_callback(&dice->tx_stream[i],
+						CALLBACK_TIMEOUT)) ||
+		    (i < rx_params.count &&
+		     !amdtp_stream_wait_callback(&dice->rx_stream[i],
+						 CALLBACK_TIMEOUT))) {
+			err = -ETIMEDOUT;
+			goto error;
+		}
+	}
+
+	return 0;
+error:
+	stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
+	stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
+	snd_dice_transaction_clear_enable(dice);
+	release_resources(dice);
+	return err;
+}
+
 /*
  * MEMO: After this function, there're two states of streams:
  *  - None streams are running.
@@ -265,17 +389,13 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate)
 {
 	unsigned int curr_rate;
 	unsigned int i;
-	struct reg_params tx_params, rx_params;
-	bool need_to_start;
+	enum snd_dice_rate_mode mode;
 	int err;
 
 	if (dice->substreams_counter == 0)
 		return -EIO;
 
-	err = get_register_params(dice, &tx_params, &rx_params);
-	if (err < 0)
-		return err;
-
+	/* Check sampling transmission frequency. */
 	err = snd_dice_transaction_get_rate(dice, &curr_rate);
 	if (err < 0) {
 		dev_err(&dice->unit->device,
@@ -285,72 +405,36 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate)
 	if (rate == 0)
 		rate = curr_rate;
 	if (rate != curr_rate)
-		return -EINVAL;
+		goto restart;
 
-	/* Judge to need to restart streams. */
-	for (i = 0; i < MAX_STREAMS; i++) {
-		if (i < tx_params.count) {
-			if (amdtp_streaming_error(&dice->tx_stream[i]) ||
-			    !amdtp_stream_running(&dice->tx_stream[i]))
-				break;
-		}
-		if (i < rx_params.count) {
-			if (amdtp_streaming_error(&dice->rx_stream[i]) ||
-			    !amdtp_stream_running(&dice->rx_stream[i]))
-				break;
-		}
+	/* Check error of packet streaming. */
+	for (i = 0; i < MAX_STREAMS; ++i) {
+		if (amdtp_streaming_error(&dice->tx_stream[i]))
+			break;
+		if (amdtp_streaming_error(&dice->rx_stream[i]))
+			break;
 	}
-	need_to_start = (i < MAX_STREAMS);
-
-	if (need_to_start) {
-		/* Stop transmission. */
-		snd_dice_transaction_clear_enable(dice);
-		stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
-		stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
-		release_resources(dice);
-
-		err = ensure_phase_lock(dice);
-		if (err < 0) {
-			dev_err(&dice->unit->device,
-				"fail to ensure phase lock\n");
-			return err;
-		}
+	if (i < MAX_STREAMS)
+		goto restart;
 
-		/* Start both streams. */
-		err = start_streams(dice, AMDTP_IN_STREAM, rate, &tx_params);
-		if (err < 0)
-			goto error;
-		err = start_streams(dice, AMDTP_OUT_STREAM, rate, &rx_params);
-		if (err < 0)
-			goto error;
-
-		err = snd_dice_transaction_set_enable(dice);
-		if (err < 0) {
-			dev_err(&dice->unit->device,
-				"fail to enable interface\n");
-			goto error;
-		}
-
-		for (i = 0; i < MAX_STREAMS; i++) {
-			if ((i < tx_params.count &&
-			    !amdtp_stream_wait_callback(&dice->tx_stream[i],
-							CALLBACK_TIMEOUT)) ||
-			    (i < rx_params.count &&
-			     !amdtp_stream_wait_callback(&dice->rx_stream[i],
-							 CALLBACK_TIMEOUT))) {
-				err = -ETIMEDOUT;
-				goto error;
-			}
-		}
+	/* Check required streams are running or not. */
+	err = snd_dice_stream_get_rate_mode(dice, rate, &mode);
+	if (err < 0)
+		return err;
+	for (i = 0; i < MAX_STREAMS; ++i) {
+		if (dice->tx_pcm_chs[i][mode] > 0 &&
+		    !amdtp_stream_running(&dice->tx_stream[i]))
+			break;
+		if (dice->rx_pcm_chs[i][mode] > 0 &&
+		    !amdtp_stream_running(&dice->rx_stream[i]))
+			break;
 	}
+	if (i < MAX_STREAMS)
+		goto restart;
 
-	return err;
-error:
-	snd_dice_transaction_clear_enable(dice);
-	stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
-	stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
-	release_resources(dice);
-	return err;
+	return 0;
+restart:
+	return start_duplex_streams(dice, rate);
 }
 
 /*
@@ -484,6 +568,69 @@ void snd_dice_stream_update_duplex(struct snd_dice *dice)
 	}
 }
 
+int snd_dice_stream_detect_current_formats(struct snd_dice *dice)
+{
+	unsigned int rate;
+	enum snd_dice_rate_mode mode;
+	__be32 reg[2];
+	struct reg_params tx_params, rx_params;
+	int i;
+	int err;
+
+	/* If extended protocol is available, detect detail spec. */
+	err = snd_dice_detect_extension_formats(dice);
+	if (err >= 0)
+		return err;
+
+	/*
+	 * Available stream format is restricted at current mode of sampling
+	 * clock.
+	 */
+	err = snd_dice_transaction_get_rate(dice, &rate);
+	if (err < 0)
+		return err;
+
+	err = snd_dice_stream_get_rate_mode(dice, rate, &mode);
+	if (err < 0)
+		return err;
+
+	/*
+	 * Just after owning the unit (GLOBAL_OWNER), the unit can return
+	 * invalid stream formats. Selecting clock parameters have an effect
+	 * for the unit to refine it.
+	 */
+	err = ensure_phase_lock(dice, rate);
+	if (err < 0)
+		return err;
+
+	err = get_register_params(dice, &tx_params, &rx_params);
+	if (err < 0)
+		return err;
+
+	for (i = 0; i < tx_params.count; ++i) {
+		err = snd_dice_transaction_read_tx(dice,
+				tx_params.size * i + TX_NUMBER_AUDIO,
+				reg, sizeof(reg));
+		if (err < 0)
+			return err;
+		dice->tx_pcm_chs[i][mode] = be32_to_cpu(reg[0]);
+		dice->tx_midi_ports[i] = max_t(unsigned int,
+				be32_to_cpu(reg[1]), dice->tx_midi_ports[i]);
+	}
+	for (i = 0; i < rx_params.count; ++i) {
+		err = snd_dice_transaction_read_rx(dice,
+				rx_params.size * i + RX_NUMBER_AUDIO,
+				reg, sizeof(reg));
+		if (err < 0)
+			return err;
+		dice->rx_pcm_chs[i][mode] = be32_to_cpu(reg[0]);
+		dice->rx_midi_ports[i] = max_t(unsigned int,
+				be32_to_cpu(reg[1]), dice->rx_midi_ports[i]);
+	}
+
+	return 0;
+}
+
 static void dice_lock_changed(struct snd_dice *dice)
 {
 	dice->dev_lock_changed = true;
diff --git a/sound/firewire/dice/dice-tcelectronic.c b/sound/firewire/dice/dice-tcelectronic.c
new file mode 100644
index 000000000000..af8203b9d1a6
--- /dev/null
+++ b/sound/firewire/dice/dice-tcelectronic.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dice-tc_electronic.c - a part of driver for DICE based devices
+ *
+ * Copyright (c) 2018 Takashi Sakamoto
+ */
+
+#include "dice.h"
+
+struct dice_tc_spec {
+	unsigned int tx_pcm_chs[MAX_STREAMS][SND_DICE_RATE_MODE_COUNT];
+	unsigned int rx_pcm_chs[MAX_STREAMS][SND_DICE_RATE_MODE_COUNT];
+	bool has_midi;
+};
+
+static const struct dice_tc_spec desktop_konnekt6 = {
+	.tx_pcm_chs = {{6, 6, 2}, {0, 0, 0} },
+	.rx_pcm_chs = {{6, 6, 4}, {0, 0, 0} },
+	.has_midi = false,
+};
+
+static const struct dice_tc_spec impact_twin = {
+	.tx_pcm_chs = {{14, 10, 6}, {0, 0, 0} },
+	.rx_pcm_chs = {{14, 10, 6}, {0, 0, 0} },
+	.has_midi = true,
+};
+
+static const struct dice_tc_spec konnekt_8 = {
+	.tx_pcm_chs = {{4, 4, 3}, {0, 0, 0} },
+	.rx_pcm_chs = {{4, 4, 3}, {0, 0, 0} },
+	.has_midi = true,
+};
+
+static const struct dice_tc_spec konnekt_24d = {
+	.tx_pcm_chs = {{16, 16, 6}, {0, 0, 0} },
+	.rx_pcm_chs = {{16, 16, 6}, {0, 0, 0} },
+	.has_midi = true,
+};
+
+static const struct dice_tc_spec konnekt_live = {
+	.tx_pcm_chs = {{16, 16, 16}, {0, 0, 0} },
+	.rx_pcm_chs = {{16, 16, 16}, {0, 0, 0} },
+	.has_midi = true,
+};
+
+static const struct dice_tc_spec studio_konnekt_48 = {
+	.tx_pcm_chs = {{16, 16, 16}, {16, 16, 0} },
+	.rx_pcm_chs = {{16, 16, 16}, {16, 16, 0} },
+	.has_midi = true,
+};
+
+int snd_dice_detect_tcelectronic_formats(struct snd_dice *dice)
+{
+	static const struct {
+		u32 model_id;
+		const struct dice_tc_spec *spec;
+	} *entry, entries[] = {
+		{0x00000020, &konnekt_24d},
+		{0x00000021, &konnekt_8},
+		{0x00000022, &studio_konnekt_48},
+		{0x00000023, &konnekt_live},
+		{0x00000024, &desktop_konnekt6},
+		{0x00000027, &impact_twin},
+	};
+	struct fw_csr_iterator it;
+	int key, val, model_id;
+	int i;
+
+	model_id = 0;
+	fw_csr_iterator_init(&it, dice->unit->directory);
+	while (fw_csr_iterator_next(&it, &key, &val)) {
+		if (key == CSR_MODEL) {
+			model_id = val;
+			break;
+		}
+	}
+
+	entry = NULL;
+	for (i = 0; i < ARRAY_SIZE(entries); ++i) {
+		entry = entries + i;
+		if (entry->model_id == model_id)
+			break;
+	}
+	if (!entry)
+		return -ENODEV;
+
+	memcpy(dice->tx_pcm_chs, entry->spec->tx_pcm_chs,
+	       MAX_STREAMS * SND_DICE_RATE_MODE_COUNT * sizeof(unsigned int));
+	memcpy(dice->rx_pcm_chs, entry->spec->rx_pcm_chs,
+	       MAX_STREAMS * SND_DICE_RATE_MODE_COUNT * sizeof(unsigned int));
+
+	for (i = 0; i < MAX_STREAMS; ++i) {
+		if (entry->spec->has_midi) {
+			dice->tx_midi_ports[i] = 1;
+			dice->rx_midi_ports[i] = 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/sound/firewire/dice/dice-transaction.c b/sound/firewire/dice/dice-transaction.c
index 0f0350320ae8..b7e138b5abcf 100644
--- a/sound/firewire/dice/dice-transaction.c
+++ b/sound/firewire/dice/dice-transaction.c
@@ -265,7 +265,7 @@ int snd_dice_transaction_reinit(struct snd_dice *dice)
 static int get_subaddrs(struct snd_dice *dice)
 {
 	static const int min_values[10] = {
-		10, 0x64 / 4,
+		10, 0x60 / 4,
 		10, 0x18 / 4,
 		10, 0x18 / 4,
 		0, 0,
@@ -301,33 +301,40 @@ static int get_subaddrs(struct snd_dice *dice)
 		}
 	}
 
-	/*
-	 * Check that the implemented DICE driver specification major version
-	 * number matches.
-	 */
-	err = snd_fw_transaction(dice->unit, TCODE_READ_QUADLET_REQUEST,
-				 DICE_PRIVATE_SPACE +
-				 be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION,
-				 &version, sizeof(version), 0);
-	if (err < 0)
-		goto end;
+	if (be32_to_cpu(pointers[1]) > 0x18) {
+		/*
+		 * Check that the implemented DICE driver specification major
+		 * version number matches.
+		 */
+		err = snd_fw_transaction(dice->unit, TCODE_READ_QUADLET_REQUEST,
+				DICE_PRIVATE_SPACE +
+				be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION,
+				&version, sizeof(version), 0);
+		if (err < 0)
+			goto end;
 
-	if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) {
-		dev_err(&dice->unit->device,
-			"unknown DICE version: 0x%08x\n", be32_to_cpu(version));
-		err = -ENODEV;
-		goto end;
+		if ((version & cpu_to_be32(0xff000000)) !=
+						cpu_to_be32(0x01000000)) {
+			dev_err(&dice->unit->device,
+				"unknown DICE version: 0x%08x\n",
+				be32_to_cpu(version));
+			err = -ENODEV;
+			goto end;
+		}
+
+		/* Set up later. */
+		dice->clock_caps = 1;
 	}
 
 	dice->global_offset = be32_to_cpu(pointers[0]) * 4;
 	dice->tx_offset = be32_to_cpu(pointers[2]) * 4;
 	dice->rx_offset = be32_to_cpu(pointers[4]) * 4;
-	dice->sync_offset = be32_to_cpu(pointers[6]) * 4;
-	dice->rsrv_offset = be32_to_cpu(pointers[8]) * 4;
 
-	/* Set up later. */
-	if (be32_to_cpu(pointers[1]) * 4 >= GLOBAL_CLOCK_CAPABILITIES + 4)
-		dice->clock_caps = 1;
+	/* Old firmware doesn't support these fields. */
+	if (pointers[7])
+		dice->sync_offset = be32_to_cpu(pointers[6]) * 4;
+	if (pointers[9])
+		dice->rsrv_offset = be32_to_cpu(pointers[8]) * 4;
 end:
 	kfree(pointers);
 	return err;
diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c
index 96bb01b6b751..40f7a32e4893 100644
--- a/sound/firewire/dice/dice.c
+++ b/sound/firewire/dice/dice.c
@@ -15,40 +15,14 @@ MODULE_LICENSE("GPL v2");
 #define OUI_LOUD		0x000ff2
 #define OUI_FOCUSRITE		0x00130e
 #define OUI_TCELECTRONIC	0x000166
+#define OUI_ALESIS		0x000595
+#define OUI_MAUDIO		0x000d6c
 
 #define DICE_CATEGORY_ID	0x04
 #define WEISS_CATEGORY_ID	0x00
 #define LOUD_CATEGORY_ID	0x10
 
-/*
- * Some models support several isochronous channels, while these streams are not
- * always available. In this case, add the model name to this list.
- */
-static bool force_two_pcm_support(struct fw_unit *unit)
-{
-	static const char *const models[] = {
-		/* TC Electronic models. */
-		"StudioKonnekt48",
-		/* Focusrite models. */
-		"SAFFIRE_PRO_40",
-		"LIQUID_SAFFIRE_56",
-		"SAFFIRE_PRO_40_1",
-	};
-	char model[32];
-	unsigned int i;
-	int err;
-
-	err = fw_csr_string(unit->directory, CSR_MODEL, model, sizeof(model));
-	if (err < 0)
-		return false;
-
-	for (i = 0; i < ARRAY_SIZE(models); i++) {
-		if (strcmp(models[i], model) == 0)
-			break;
-	}
-
-	return i < ARRAY_SIZE(models);
-}
+#define MODEL_ALESIS_IO_BOTH	0x000001
 
 static int check_dice_category(struct fw_unit *unit)
 {
@@ -75,11 +49,6 @@ static int check_dice_category(struct fw_unit *unit)
 		}
 	}
 
-	if (vendor == OUI_FOCUSRITE || vendor == OUI_TCELECTRONIC) {
-		if (force_two_pcm_support(unit))
-			return 0;
-	}
-
 	if (vendor == OUI_WEISS)
 		category = WEISS_CATEGORY_ID;
 	else if (vendor == OUI_LOUD)
@@ -186,9 +155,6 @@ static void do_registration(struct work_struct *work)
 	if (err < 0)
 		return;
 
-	if (force_two_pcm_support(dice->unit))
-		dice->force_two_pcms = true;
-
 	err = snd_dice_transaction_init(dice);
 	if (err < 0)
 		goto error;
@@ -199,6 +165,10 @@ static void do_registration(struct work_struct *work)
 
 	dice_card_strings(dice);
 
+	err = dice->detect_formats(dice);
+	if (err < 0)
+		goto error;
+
 	err = snd_dice_stream_init_duplex(dice);
 	if (err < 0)
 		goto error;
@@ -239,14 +209,17 @@ error:
 		 "Sound card registration failed: %d\n", err);
 }
 
-static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id)
+static int dice_probe(struct fw_unit *unit,
+		      const struct ieee1394_device_id *entry)
 {
 	struct snd_dice *dice;
 	int err;
 
-	err = check_dice_category(unit);
-	if (err < 0)
-		return -ENODEV;
+	if (!entry->driver_data) {
+		err = check_dice_category(unit);
+		if (err < 0)
+			return -ENODEV;
+	}
 
 	/* Allocate this independent of sound card instance. */
 	dice = kzalloc(sizeof(struct snd_dice), GFP_KERNEL);
@@ -256,6 +229,13 @@ static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id)
 	dice->unit = fw_unit_get(unit);
 	dev_set_drvdata(&unit->device, dice);
 
+	if (!entry->driver_data) {
+		dice->detect_formats = snd_dice_stream_detect_current_formats;
+	} else {
+		dice->detect_formats =
+				(snd_dice_detect_formats_t)entry->driver_data;
+	}
+
 	spin_lock_init(&dice->lock);
 	mutex_init(&dice->mutex);
 	init_completion(&dice->clock_accepted);
@@ -313,16 +293,81 @@ static void dice_bus_reset(struct fw_unit *unit)
 #define DICE_INTERFACE	0x000001
 
 static const struct ieee1394_device_id dice_id_table[] = {
+	/* M-Audio Profire 2626 has a different value in version field. */
 	{
-		.match_flags = IEEE1394_MATCH_VERSION,
-		.version     = DICE_INTERFACE,
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_MAUDIO,
+		.model_id	= 0x000010,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats,
+	},
+	/* M-Audio Profire 610 has a different value in version field. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_MAUDIO,
+		.model_id	= 0x000011,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats,
+	},
+	/* TC Electronic Konnekt 24D. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_TCELECTRONIC,
+		.model_id	= 0x000020,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
+	},
+	/* TC Electronic Konnekt 8. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_TCELECTRONIC,
+		.model_id	= 0x000021,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
+	},
+	/* TC Electronic Studio Konnekt 48. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_TCELECTRONIC,
+		.model_id	= 0x000022,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
-	/* M-Audio Profire 610/2626 has a different value in version field. */
+	/* TC Electronic Konnekt Live. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
-				  IEEE1394_MATCH_SPECIFIER_ID,
-		.vendor_id	= 0x000d6c,
-		.specifier_id	= 0x000d6c,
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_TCELECTRONIC,
+		.model_id	= 0x000023,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
+	},
+	/* TC Electronic Desktop Konnekt 6. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_TCELECTRONIC,
+		.model_id	= 0x000024,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
+	},
+	/* TC Electronic Impact Twin. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_TCELECTRONIC,
+		.model_id	= 0x000027,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
+	},
+	/* Alesis iO14/iO26. */
+	{
+		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
+				  IEEE1394_MATCH_MODEL_ID,
+		.vendor_id	= OUI_ALESIS,
+		.model_id	= MODEL_ALESIS_IO_BOTH,
+		.driver_data = (kernel_ulong_t)snd_dice_detect_alesis_formats,
+	},
+	{
+		.match_flags = IEEE1394_MATCH_VERSION,
+		.version     = DICE_INTERFACE,
 	},
 	{ }
 };
diff --git a/sound/firewire/dice/dice.h b/sound/firewire/dice/dice.h
index da00e75e09d4..505b79fea6d9 100644
--- a/sound/firewire/dice/dice.h
+++ b/sound/firewire/dice/dice.h
@@ -63,6 +63,16 @@
  */
 #define MAX_STREAMS	2
 
+enum snd_dice_rate_mode {
+	SND_DICE_RATE_MODE_LOW = 0,
+	SND_DICE_RATE_MODE_MIDDLE,
+	SND_DICE_RATE_MODE_HIGH,
+	SND_DICE_RATE_MODE_COUNT,
+};
+
+struct snd_dice;
+typedef int (*snd_dice_detect_formats_t)(struct snd_dice *dice);
+
 struct snd_dice {
 	struct snd_card *card;
 	struct fw_unit *unit;
@@ -80,6 +90,11 @@ struct snd_dice {
 	unsigned int rsrv_offset;
 
 	unsigned int clock_caps;
+	unsigned int tx_pcm_chs[MAX_STREAMS][SND_DICE_RATE_MODE_COUNT];
+	unsigned int rx_pcm_chs[MAX_STREAMS][SND_DICE_RATE_MODE_COUNT];
+	unsigned int tx_midi_ports[MAX_STREAMS];
+	unsigned int rx_midi_ports[MAX_STREAMS];
+	snd_dice_detect_formats_t detect_formats;
 
 	struct fw_address_handler notification_handler;
 	int owner_generation;
@@ -98,8 +113,6 @@ struct snd_dice {
 	bool global_enabled;
 	struct completion clock_accepted;
 	unsigned int substreams_counter;
-
-	bool force_two_pcms;
 };
 
 enum snd_dice_addr_type {
@@ -190,11 +203,14 @@ void snd_dice_transaction_destroy(struct snd_dice *dice);
 #define SND_DICE_RATES_COUNT	7
 extern const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT];
 
+int snd_dice_stream_get_rate_mode(struct snd_dice *dice, unsigned int rate,
+				  enum snd_dice_rate_mode *mode);
 int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate);
 void snd_dice_stream_stop_duplex(struct snd_dice *dice);
 int snd_dice_stream_init_duplex(struct snd_dice *dice);
 void snd_dice_stream_destroy_duplex(struct snd_dice *dice);
 void snd_dice_stream_update_duplex(struct snd_dice *dice);
+int snd_dice_stream_detect_current_formats(struct snd_dice *dice);
 
 int snd_dice_stream_lock_try(struct snd_dice *dice);
 void snd_dice_stream_lock_release(struct snd_dice *dice);
@@ -207,4 +223,8 @@ void snd_dice_create_proc(struct snd_dice *dice);
 
 int snd_dice_create_midi(struct snd_dice *dice);
 
+int snd_dice_detect_tcelectronic_formats(struct snd_dice *dice);
+int snd_dice_detect_alesis_formats(struct snd_dice *dice);
+int snd_dice_detect_extension_formats(struct snd_dice *dice);
+
 #endif
diff --git a/sound/firewire/isight.c b/sound/firewire/isight.c
index 46092fa3ff9b..3919e186a30b 100644
--- a/sound/firewire/isight.c
+++ b/sound/firewire/isight.c
@@ -569,18 +569,20 @@ static int isight_create_mixer(struct isight *isight)
 		return err;
 	isight->gain_max = be32_to_cpu(value);
 
-	isight->gain_tlv[0] = SNDRV_CTL_TLVT_DB_MINMAX;
-	isight->gain_tlv[1] = 2 * sizeof(unsigned int);
+	isight->gain_tlv[SNDRV_CTL_TLVO_TYPE] = SNDRV_CTL_TLVT_DB_MINMAX;
+	isight->gain_tlv[SNDRV_CTL_TLVO_LEN] = 2 * sizeof(unsigned int);
 
 	err = reg_read(isight, REG_GAIN_DB_START, &value);
 	if (err < 0)
 		return err;
-	isight->gain_tlv[2] = (s32)be32_to_cpu(value) * 100;
+	isight->gain_tlv[SNDRV_CTL_TLVO_DB_MINMAX_MIN] =
+						(s32)be32_to_cpu(value) * 100;
 
 	err = reg_read(isight, REG_GAIN_DB_END, &value);
 	if (err < 0)
 		return err;
-	isight->gain_tlv[3] = (s32)be32_to_cpu(value) * 100;
+	isight->gain_tlv[SNDRV_CTL_TLVO_DB_MINMAX_MAX] =
+						(s32)be32_to_cpu(value) * 100;
 
 	ctl = snd_ctl_new1(&gain_control, isight);
 	if (ctl)