--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+
+// motu-protocol-v1.c - a part of driver for MOTU FireWire series
+//
+// Copyright (c) 2021 Takashi Sakamoto <o-takashi@sakamocchi.jp>
+//
+// Licensed under the terms of the GNU General Public License, version 2.
+
+#include "motu.h"
+
+#include <linux/delay.h>
+
+// Status register for MOTU 828 (0x'ffff'f000'0b00).
+//
+// 0xffff0000: ISOC_COMM_CONTROL_MASK in motu-stream.c.
+// 0x00008000: mode of optical input interface.
+// 0x00008000: for S/PDIF signal.
+// 0x00000000: disabled or for ADAT signal.
+// 0x00004000: mode of optical output interface.
+// 0x00004000: for S/PDIF signal.
+// 0x00000000: disabled or for ADAT signal.
+// 0x00003f40: monitor input mode.
+// 0x00000800: analog-1/2
+// 0x00001a00: analog-3/4
+// 0x00002c00: analog-5/6
+// 0x00003e00: analog-7/8
+// 0x00000000: analog-1
+// 0x00000900: analog-2
+// 0x00001200: analog-3
+// 0x00001b00: analog-4
+// 0x00002400: analog-5
+// 0x00002d00: analog-6
+// 0x00003600: analog-7
+// 0x00003f00: analog-8
+// 0x00000040: disabled
+// 0x00000004: rate of sampling clock.
+// 0x00000004: 48.0 kHz
+// 0x00000000: 44.1 kHz
+// 0x00000023: source of sampling clock.
+// 0x00000002: S/PDIF on optical/coaxial interface.
+// 0x00000021: ADAT on optical interface
+// 0x00000001: ADAT on Dsub 9pin
+// 0x00000000: internal or SMPTE
+
+#define CLK_828_STATUS_OFFSET 0x0b00
+#define CLK_828_STATUS_MASK 0x0000ffff
+#define CLK_828_STATUS_FLAG_OPT_IN_IFACE_IS_SPDIF 0x00008000
+#define CLK_828_STATUS_FLAG_OPT_OUT_IFACE_IS_SPDIF 0x00004000
+#define CLK_828_STATUS_FLAG_FETCH_PCM_FRAMES 0x00000080
+#define CLK_828_STATUS_FLAG_SRC_IS_NOT_FROM_ADAT_DSUB 0x00000020
+#define CLK_828_STATUS_FLAG_OUTPUT_MUTE 0x00000008
+#define CLK_828_STATUS_FLAG_RATE_48000 0x00000004
+#define CLK_828_STATUS_FLAG_SRC_SPDIF_ON_OPT_OR_COAX 0x00000002
+#define CLK_828_STATUS_FLAG_SRC_ADAT_ON_OPT_OR_DSUB 0x00000001
+
+static void parse_clock_rate_828(u32 data, unsigned int *rate)
+{
+ if (data & CLK_828_STATUS_FLAG_RATE_48000)
+ *rate = 48000;
+ else
+ *rate = 44100;
+}
+
+static int get_clock_rate_828(struct snd_motu *motu, unsigned int *rate)
+{
+ __be32 reg;
+ int err;
+
+ err = snd_motu_transaction_read(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+ if (err < 0)
+ return err;
+ parse_clock_rate_828(be32_to_cpu(reg), rate);
+
+ return 0;
+}
+
+int snd_motu_protocol_v1_get_clock_rate(struct snd_motu *motu, unsigned int *rate)
+{
+ if (motu->spec == &snd_motu_spec_828)
+ return get_clock_rate_828(motu, rate);
+ else
+ return -ENXIO;
+}
+
+static int set_clock_rate_828(struct snd_motu *motu, unsigned int rate)
+{
+ __be32 reg;
+ u32 data;
+ int err;
+
+ err = snd_motu_transaction_read(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+ if (err < 0)
+ return err;
+ data = be32_to_cpu(reg) & CLK_828_STATUS_MASK;
+
+ data &= ~CLK_828_STATUS_FLAG_RATE_48000;
+ if (rate == 48000)
+ data |= CLK_828_STATUS_FLAG_RATE_48000;
+
+ reg = cpu_to_be32(data);
+ return snd_motu_transaction_write(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+}
+
+int snd_motu_protocol_v1_set_clock_rate(struct snd_motu *motu, unsigned int rate)
+{
+ if (motu->spec == &snd_motu_spec_828)
+ return set_clock_rate_828(motu, rate);
+ else
+ return -ENXIO;
+}
+
+static int get_clock_source_828(struct snd_motu *motu, enum snd_motu_clock_source *src)
+{
+ __be32 reg;
+ u32 data;
+ int err;
+
+ err = snd_motu_transaction_read(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+ if (err < 0)
+ return err;
+ data = be32_to_cpu(reg) & CLK_828_STATUS_MASK;
+
+ if (data & CLK_828_STATUS_FLAG_SRC_ADAT_ON_OPT_OR_DSUB) {
+ if (data & CLK_828_STATUS_FLAG_SRC_IS_NOT_FROM_ADAT_DSUB)
+ *src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT;
+ else
+ *src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB;
+ } else if (data & CLK_828_STATUS_FLAG_SRC_SPDIF_ON_OPT_OR_COAX) {
+ if (data & CLK_828_STATUS_FLAG_OPT_IN_IFACE_IS_SPDIF)
+ *src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT;
+ else
+ *src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
+ } else {
+ *src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
+ }
+
+ return 0;
+}
+
+int snd_motu_protocol_v1_get_clock_source(struct snd_motu *motu, enum snd_motu_clock_source *src)
+{
+ if (motu->spec == &snd_motu_spec_828)
+ return get_clock_source_828(motu, src);
+ else
+ return -ENXIO;
+}
+
+static int switch_fetching_mode_828(struct snd_motu *motu, bool enable)
+{
+ __be32 reg;
+ u32 data;
+ int err;
+
+ err = snd_motu_transaction_read(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+ if (err < 0)
+ return err;
+ data = be32_to_cpu(reg) & CLK_828_STATUS_MASK;
+
+ data &= ~(CLK_828_STATUS_FLAG_FETCH_PCM_FRAMES | CLK_828_STATUS_FLAG_OUTPUT_MUTE);
+ if (enable) {
+ // This transaction should be initiated after the device receives batch of packets
+ // since the device voluntarily mutes outputs. As a workaround, yield processor over
+ // 100 msec.
+ msleep(100);
+ data |= CLK_828_STATUS_FLAG_FETCH_PCM_FRAMES | CLK_828_STATUS_FLAG_OUTPUT_MUTE;
+ }
+
+ reg = cpu_to_be32(data);
+ return snd_motu_transaction_write(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+}
+
+int snd_motu_protocol_v1_switch_fetching_mode(struct snd_motu *motu, bool enable)
+{
+ if (motu->spec == &snd_motu_spec_828)
+ return switch_fetching_mode_828(motu, enable);
+ else
+ return -ENXIO;
+}
+
+static int detect_packet_formats_828(struct snd_motu *motu)
+{
+ __be32 reg;
+ u32 data;
+ int err;
+
+ motu->tx_packet_formats.pcm_byte_offset = 4;
+ motu->tx_packet_formats.msg_chunks = 2;
+
+ motu->rx_packet_formats.pcm_byte_offset = 4;
+ motu->rx_packet_formats.msg_chunks = 0;
+
+ err = snd_motu_transaction_read(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg));
+ if (err < 0)
+ return err;
+ data = be32_to_cpu(reg) & CLK_828_STATUS_MASK;
+
+ // The number of chunks is just reduced when SPDIF is activated.
+ if (!(data & CLK_828_STATUS_FLAG_OPT_IN_IFACE_IS_SPDIF))
+ motu->tx_packet_formats.pcm_chunks[0] += 8;
+
+ if (!(data & CLK_828_STATUS_FLAG_OPT_OUT_IFACE_IS_SPDIF))
+ motu->rx_packet_formats.pcm_chunks[0] += 8;
+
+ return 0;
+}
+
+int snd_motu_protocol_v1_cache_packet_formats(struct snd_motu *motu)
+{
+ memcpy(motu->tx_packet_formats.pcm_chunks, motu->spec->tx_fixed_pcm_chunks,
+ sizeof(motu->tx_packet_formats.pcm_chunks));
+ memcpy(motu->rx_packet_formats.pcm_chunks, motu->spec->rx_fixed_pcm_chunks,
+ sizeof(motu->rx_packet_formats.pcm_chunks));
+
+ if (motu->spec == &snd_motu_spec_828)
+ return detect_packet_formats_828(motu);
+ else
+ return 0;
+}
+
+const struct snd_motu_spec snd_motu_spec_828 = {
+ .name = "828",
+ .protocol_version = SND_MOTU_PROTOCOL_V1,
+ .tx_fixed_pcm_chunks = {10, 0, 0},
+ .rx_fixed_pcm_chunks = {10, 0, 0},
+};
};
enum snd_motu_protocol_version {
+ SND_MOTU_PROTOCOL_V1,
SND_MOTU_PROTOCOL_V2,
SND_MOTU_PROTOCOL_V3,
};
unsigned char rx_fixed_pcm_chunks[3];
};
+extern const struct snd_motu_spec snd_motu_spec_828;
+
extern const struct snd_motu_spec snd_motu_spec_828mk2;
extern const struct snd_motu_spec snd_motu_spec_traveler;
extern const struct snd_motu_spec snd_motu_spec_ultralite;
int snd_motu_create_hwdep_device(struct snd_motu *motu);
+int snd_motu_protocol_v1_get_clock_rate(struct snd_motu *motu,
+ unsigned int *rate);
+int snd_motu_protocol_v1_set_clock_rate(struct snd_motu *motu,
+ unsigned int rate);
+int snd_motu_protocol_v1_get_clock_source(struct snd_motu *motu,
+ enum snd_motu_clock_source *src);
+int snd_motu_protocol_v1_switch_fetching_mode(struct snd_motu *motu,
+ bool enable);
+int snd_motu_protocol_v1_cache_packet_formats(struct snd_motu *motu);
+
int snd_motu_protocol_v2_get_clock_rate(struct snd_motu *motu,
unsigned int *rate);
int snd_motu_protocol_v2_set_clock_rate(struct snd_motu *motu,
return snd_motu_protocol_v2_get_clock_rate(motu, rate);
else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
return snd_motu_protocol_v3_get_clock_rate(motu, rate);
+ else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V1)
+ return snd_motu_protocol_v1_get_clock_rate(motu, rate);
else
return -ENXIO;
}
return snd_motu_protocol_v2_set_clock_rate(motu, rate);
else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
return snd_motu_protocol_v3_set_clock_rate(motu, rate);
+ else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V1)
+ return snd_motu_protocol_v1_set_clock_rate(motu, rate);
else
return -ENXIO;
}
return snd_motu_protocol_v2_get_clock_source(motu, source);
else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
return snd_motu_protocol_v3_get_clock_source(motu, source);
+ else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V1)
+ return snd_motu_protocol_v1_get_clock_source(motu, source);
else
return -ENXIO;
}
return snd_motu_protocol_v2_switch_fetching_mode(motu, enable);
else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
return snd_motu_protocol_v3_switch_fetching_mode(motu, enable);
+ else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V1)
+ return snd_motu_protocol_v1_switch_fetching_mode(motu, enable);
else
return -ENXIO;
}
return snd_motu_protocol_v2_cache_packet_formats(motu);
else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
return snd_motu_protocol_v3_cache_packet_formats(motu);
+ else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V1)
+ return snd_motu_protocol_v1_cache_packet_formats(motu);
else
return -ENXIO;
}
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