Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 459 insertions, 0 deletions

diff --git a/sound/firewire/digi00x/digi00x-stream.c b/sound/firewire/digi00x/digi00x-stream.c
new file mode 100644
index 000000000..295163bb8
--- /dev/null
+++ b/sound/firewire/digi00x/digi00x-stream.c
@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * digi00x-stream.c - a part of driver for Digidesign Digi 002/003 family
+ *
+ * Copyright (c) 2014-2015 Takashi Sakamoto
+ */
+
+#include "digi00x.h"
+
+#define READY_TIMEOUT_MS	200
+
+const unsigned int snd_dg00x_stream_rates[SND_DG00X_RATE_COUNT] = {
+	[SND_DG00X_RATE_44100] = 44100,
+	[SND_DG00X_RATE_48000] = 48000,
+	[SND_DG00X_RATE_88200] = 88200,
+	[SND_DG00X_RATE_96000] = 96000,
+};
+
+/* Multi Bit Linear Audio data channels for each sampling transfer frequency. */
+const unsigned int
+snd_dg00x_stream_pcm_channels[SND_DG00X_RATE_COUNT] = {
+	/* Analog/ADAT/SPDIF */
+	[SND_DG00X_RATE_44100] = (8 + 8 + 2),
+	[SND_DG00X_RATE_48000] = (8 + 8 + 2),
+	/* Analog/SPDIF */
+	[SND_DG00X_RATE_88200] = (8 + 2),
+	[SND_DG00X_RATE_96000] = (8 + 2),
+};
+
+int snd_dg00x_stream_get_local_rate(struct snd_dg00x *dg00x, unsigned int *rate)
+{
+	u32 data;
+	__be32 reg;
+	int err;
+
+	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
+				 DG00X_ADDR_BASE + DG00X_OFFSET_LOCAL_RATE,
+				 &reg, sizeof(reg), 0);
+	if (err < 0)
+		return err;
+
+	data = be32_to_cpu(reg) & 0x0f;
+	if (data < ARRAY_SIZE(snd_dg00x_stream_rates))
+		*rate = snd_dg00x_stream_rates[data];
+	else
+		err = -EIO;
+
+	return err;
+}
+
+int snd_dg00x_stream_set_local_rate(struct snd_dg00x *dg00x, unsigned int rate)
+{
+	__be32 reg;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(snd_dg00x_stream_rates); i++) {
+		if (rate == snd_dg00x_stream_rates[i])
+			break;
+	}
+	if (i == ARRAY_SIZE(snd_dg00x_stream_rates))
+		return -EINVAL;
+
+	reg = cpu_to_be32(i);
+	return snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
+				  DG00X_ADDR_BASE + DG00X_OFFSET_LOCAL_RATE,
+				  &reg, sizeof(reg), 0);
+}
+
+int snd_dg00x_stream_get_clock(struct snd_dg00x *dg00x,
+			       enum snd_dg00x_clock *clock)
+{
+	__be32 reg;
+	int err;
+
+	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
+				 DG00X_ADDR_BASE + DG00X_OFFSET_CLOCK_SOURCE,
+				 &reg, sizeof(reg), 0);
+	if (err < 0)
+		return err;
+
+	*clock = be32_to_cpu(reg) & 0x0f;
+	if (*clock >= SND_DG00X_CLOCK_COUNT)
+		err = -EIO;
+
+	return err;
+}
+
+int snd_dg00x_stream_check_external_clock(struct snd_dg00x *dg00x, bool *detect)
+{
+	__be32 reg;
+	int err;
+
+	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
+				 DG00X_ADDR_BASE + DG00X_OFFSET_DETECT_EXTERNAL,
+				 &reg, sizeof(reg), 0);
+	if (err >= 0)
+		*detect = be32_to_cpu(reg) > 0;
+
+	return err;
+}
+
+int snd_dg00x_stream_get_external_rate(struct snd_dg00x *dg00x,
+				       unsigned int *rate)
+{
+	u32 data;
+	__be32 reg;
+	int err;
+
+	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
+				 DG00X_ADDR_BASE + DG00X_OFFSET_EXTERNAL_RATE,
+				 &reg, sizeof(reg), 0);
+	if (err < 0)
+		return err;
+
+	data = be32_to_cpu(reg) & 0x0f;
+	if (data < ARRAY_SIZE(snd_dg00x_stream_rates))
+		*rate = snd_dg00x_stream_rates[data];
+	/* This means desync. */
+	else
+		err = -EBUSY;
+
+	return err;
+}
+
+static void finish_session(struct snd_dg00x *dg00x)
+{
+	__be32 data;
+
+	data = cpu_to_be32(0x00000003);
+	snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
+			   DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_SET,
+			   &data, sizeof(data), 0);
+
+	// Unregister isochronous channels for both direction.
+	data = 0;
+	snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
+			   DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
+			   &data, sizeof(data), 0);
+
+	// Just after finishing the session, the device may lost transmitting
+	// functionality for a short time.
+	msleep(50);
+}
+
+static int begin_session(struct snd_dg00x *dg00x)
+{
+	__be32 data;
+	u32 curr;
+	int err;
+
+	// Register isochronous channels for both direction.
+	data = cpu_to_be32((dg00x->tx_resources.channel << 16) |
+			   dg00x->rx_resources.channel);
+	err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
+				 DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
+				 &data, sizeof(data), 0);
+	if (err < 0)
+		return err;
+
+	err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
+				 DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_STATE,
+				 &data, sizeof(data), 0);
+	if (err < 0)
+		return err;
+	curr = be32_to_cpu(data);
+
+	if (curr == 0)
+		curr = 2;
+
+	curr--;
+	while (curr > 0) {
+		data = cpu_to_be32(curr);
+		err = snd_fw_transaction(dg00x->unit,
+					 TCODE_WRITE_QUADLET_REQUEST,
+					 DG00X_ADDR_BASE +
+					 DG00X_OFFSET_STREAMING_SET,
+					 &data, sizeof(data), 0);
+		if (err < 0)
+			break;
+
+		msleep(20);
+		curr--;
+	}
+
+	return err;
+}
+
+static int keep_resources(struct snd_dg00x *dg00x, struct amdtp_stream *stream,
+			  unsigned int rate)
+{
+	struct fw_iso_resources *resources;
+	int i;
+	int err;
+
+	// Check sampling rate.
+	for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
+		if (snd_dg00x_stream_rates[i] == rate)
+			break;
+	}
+	if (i == SND_DG00X_RATE_COUNT)
+		return -EINVAL;
+
+	if (stream == &dg00x->tx_stream)
+		resources = &dg00x->tx_resources;
+	else
+		resources = &dg00x->rx_resources;
+
+	err = amdtp_dot_set_parameters(stream, rate,
+				       snd_dg00x_stream_pcm_channels[i]);
+	if (err < 0)
+		return err;
+
+	return fw_iso_resources_allocate(resources,
+				amdtp_stream_get_max_payload(stream),
+				fw_parent_device(dg00x->unit)->max_speed);
+}
+
+static int init_stream(struct snd_dg00x *dg00x, struct amdtp_stream *s)
+{
+	struct fw_iso_resources *resources;
+	enum amdtp_stream_direction dir;
+	int err;
+
+	if (s == &dg00x->tx_stream) {
+		resources = &dg00x->tx_resources;
+		dir = AMDTP_IN_STREAM;
+	} else {
+		resources = &dg00x->rx_resources;
+		dir = AMDTP_OUT_STREAM;
+	}
+
+	err = fw_iso_resources_init(resources, dg00x->unit);
+	if (err < 0)
+		return err;
+
+	err = amdtp_dot_init(s, dg00x->unit, dir);
+	if (err < 0)
+		fw_iso_resources_destroy(resources);
+
+	return err;
+}
+
+static void destroy_stream(struct snd_dg00x *dg00x, struct amdtp_stream *s)
+{
+	amdtp_stream_destroy(s);
+
+	if (s == &dg00x->tx_stream)
+		fw_iso_resources_destroy(&dg00x->tx_resources);
+	else
+		fw_iso_resources_destroy(&dg00x->rx_resources);
+}
+
+int snd_dg00x_stream_init_duplex(struct snd_dg00x *dg00x)
+{
+	int err;
+
+	err = init_stream(dg00x, &dg00x->rx_stream);
+	if (err < 0)
+		return err;
+
+	err = init_stream(dg00x, &dg00x->tx_stream);
+	if (err < 0) {
+		destroy_stream(dg00x, &dg00x->rx_stream);
+		return err;
+	}
+
+	err = amdtp_domain_init(&dg00x->domain);
+	if (err < 0) {
+		destroy_stream(dg00x, &dg00x->rx_stream);
+		destroy_stream(dg00x, &dg00x->tx_stream);
+	}
+
+	return err;
+}
+
+/*
+ * This function should be called before starting streams or after stopping
+ * streams.
+ */
+void snd_dg00x_stream_destroy_duplex(struct snd_dg00x *dg00x)
+{
+	amdtp_domain_destroy(&dg00x->domain);
+
+	destroy_stream(dg00x, &dg00x->rx_stream);
+	destroy_stream(dg00x, &dg00x->tx_stream);
+}
+
+int snd_dg00x_stream_reserve_duplex(struct snd_dg00x *dg00x, unsigned int rate,
+				    unsigned int frames_per_period,
+				    unsigned int frames_per_buffer)
+{
+	unsigned int curr_rate;
+	int err;
+
+	err = snd_dg00x_stream_get_local_rate(dg00x, &curr_rate);
+	if (err < 0)
+		return err;
+	if (rate == 0)
+		rate = curr_rate;
+
+	if (dg00x->substreams_counter == 0 || curr_rate != rate) {
+		amdtp_domain_stop(&dg00x->domain);
+
+		finish_session(dg00x);
+
+		fw_iso_resources_free(&dg00x->tx_resources);
+		fw_iso_resources_free(&dg00x->rx_resources);
+
+		err = snd_dg00x_stream_set_local_rate(dg00x, rate);
+		if (err < 0)
+			return err;
+
+		err = keep_resources(dg00x, &dg00x->rx_stream, rate);
+		if (err < 0)
+			return err;
+
+		err = keep_resources(dg00x, &dg00x->tx_stream, rate);
+		if (err < 0) {
+			fw_iso_resources_free(&dg00x->rx_resources);
+			return err;
+		}
+
+		err = amdtp_domain_set_events_per_period(&dg00x->domain,
+					frames_per_period, frames_per_buffer);
+		if (err < 0) {
+			fw_iso_resources_free(&dg00x->rx_resources);
+			fw_iso_resources_free(&dg00x->tx_resources);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x)
+{
+	unsigned int generation = dg00x->rx_resources.generation;
+	int err = 0;
+
+	if (dg00x->substreams_counter == 0)
+		return 0;
+
+	if (amdtp_streaming_error(&dg00x->tx_stream) ||
+	    amdtp_streaming_error(&dg00x->rx_stream)) {
+		amdtp_domain_stop(&dg00x->domain);
+		finish_session(dg00x);
+	}
+
+	if (generation != fw_parent_device(dg00x->unit)->card->generation) {
+		err = fw_iso_resources_update(&dg00x->tx_resources);
+		if (err < 0)
+			goto error;
+
+		err = fw_iso_resources_update(&dg00x->rx_resources);
+		if (err < 0)
+			goto error;
+	}
+
+	/*
+	 * No packets are transmitted without receiving packets, reagardless of
+	 * which source of clock is used.
+	 */
+	if (!amdtp_stream_running(&dg00x->rx_stream)) {
+		int spd = fw_parent_device(dg00x->unit)->max_speed;
+
+		err = begin_session(dg00x);
+		if (err < 0)
+			goto error;
+
+		err = amdtp_domain_add_stream(&dg00x->domain, &dg00x->rx_stream,
+					      dg00x->rx_resources.channel, spd);
+		if (err < 0)
+			goto error;
+
+		err = amdtp_domain_add_stream(&dg00x->domain, &dg00x->tx_stream,
+					      dg00x->tx_resources.channel, spd);
+		if (err < 0)
+			goto error;
+
+		// NOTE: The device doesn't start packet transmission till receiving any packet.
+		// It ignores presentation time expressed by the value of syt field of CIP header
+		// in received packets. The sequence of the number of data blocks per packet is
+		// important for media clock recovery.
+		err = amdtp_domain_start(&dg00x->domain, 0, true, true);
+		if (err < 0)
+			goto error;
+
+		if (!amdtp_domain_wait_ready(&dg00x->domain, READY_TIMEOUT_MS)) {
+			err = -ETIMEDOUT;
+			goto error;
+		}
+	}
+
+	return 0;
+error:
+	amdtp_domain_stop(&dg00x->domain);
+	finish_session(dg00x);
+
+	return err;
+}
+
+void snd_dg00x_stream_stop_duplex(struct snd_dg00x *dg00x)
+{
+	if (dg00x->substreams_counter == 0) {
+		amdtp_domain_stop(&dg00x->domain);
+		finish_session(dg00x);
+
+		fw_iso_resources_free(&dg00x->tx_resources);
+		fw_iso_resources_free(&dg00x->rx_resources);
+	}
+}
+
+void snd_dg00x_stream_update_duplex(struct snd_dg00x *dg00x)
+{
+	fw_iso_resources_update(&dg00x->tx_resources);
+	fw_iso_resources_update(&dg00x->rx_resources);
+
+	amdtp_stream_update(&dg00x->tx_stream);
+	amdtp_stream_update(&dg00x->rx_stream);
+}
+
+void snd_dg00x_stream_lock_changed(struct snd_dg00x *dg00x)
+{
+	dg00x->dev_lock_changed = true;
+	wake_up(&dg00x->hwdep_wait);
+}
+
+int snd_dg00x_stream_lock_try(struct snd_dg00x *dg00x)
+{
+	int err;
+
+	spin_lock_irq(&dg00x->lock);
+
+	/* user land lock this */
+	if (dg00x->dev_lock_count < 0) {
+		err = -EBUSY;
+		goto end;
+	}
+
+	/* this is the first time */
+	if (dg00x->dev_lock_count++ == 0)
+		snd_dg00x_stream_lock_changed(dg00x);
+	err = 0;
+end:
+	spin_unlock_irq(&dg00x->lock);
+	return err;
+}
+
+void snd_dg00x_stream_lock_release(struct snd_dg00x *dg00x)
+{
+	spin_lock_irq(&dg00x->lock);
+
+	if (WARN_ON(dg00x->dev_lock_count <= 0))
+		goto end;
+	if (--dg00x->dev_lock_count == 0)
+		snd_dg00x_stream_lock_changed(dg00x);
+end:
+	spin_unlock_irq(&dg00x->lock);
+}