diff options
Diffstat (limited to 'sound/firewire/motu/motu-protocol-v1.c')
| -rw-r--r-- | sound/firewire/motu/motu-protocol-v1.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/sound/firewire/motu/motu-protocol-v1.c b/sound/firewire/motu/motu-protocol-v1.c new file mode 100644 index 000000000..e811629f1 --- /dev/null +++ b/sound/firewire/motu/motu-protocol-v1.c @@ -0,0 +1,467 @@ +// 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> + +#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. +// 0x00003f00: 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 +// 0x00000080: enable stream input. +// 0x00000040: disable monitor input. +// 0x00000008: enable main out. +// 0x00000004: rate of sampling clock. +// 0x00000004: 48.0 kHz +// 0x00000000: 44.1 kHz +// 0x00000023: source of sampling clock. +// 0x00000003: source packet header (SPH) +// 0x00000002: S/PDIF on optical/coaxial interface. +// 0x00000021: ADAT on optical interface +// 0x00000001: ADAT on Dsub 9pin +// 0x00000000: internal + +#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_ENABLE_OUTPUT 0x00000008 +#define CLK_828_STATUS_FLAG_RATE_48000 0x00000004 +#define CLK_828_STATUS_MASK_SRC 0x00000023 +#define CLK_828_STATUS_FLAG_SRC_ADAT_ON_OPT 0x00000021 +#define CLK_828_STATUS_FLAG_SRC_SPH 0x00000003 +#define CLK_828_STATUS_FLAG_SRC_SPDIF 0x00000002 +#define CLK_828_STATUS_FLAG_SRC_ADAT_ON_DSUB 0x00000001 +#define CLK_828_STATUS_FLAG_SRC_INTERNAL 0x00000000 + +// Status register for MOTU 896 (0x'ffff'f000'0b14). +// +// 0xf0000000: enable physical and stream input to DAC. +// 0x80000000: disable +// 0x40000000: disable +// 0x20000000: enable (prior to the other bits) +// 0x10000000: disable +// 0x00000000: disable +// 0x08000000: speed of word clock signal output on BNC interface. +// 0x00000000: force to low rate (44.1/48.0 kHz). +// 0x08000000: follow to system clock. +// 0x04000000: something relevant to clock. +// 0x03000000: enable output. +// 0x02000000: enabled irreversibly once standing unless the device voluntarily disables it. +// 0x01000000: enabled irreversibly once standing unless the device voluntarily disables it. +// 0x00ffff00: monitor input mode. +// 0x00000000: disabled +// 0x00004800: analog-1/2 +// 0x00005a00: analog-3/4 +// 0x00006c00: analog-5/6 +// 0x00007e00: analog-7/8 +// 0x00104800: AES/EBU-1/2 +// 0x00004000: analog-1 +// 0x00004900: analog-2 +// 0x00005200: analog-3 +// 0x00005b00: analog-4 +// 0x00006400: analog-5 +// 0x00006d00: analog-6 +// 0x00007600: analog-7 +// 0x00007f00: analog-8 +// 0x00104000: AES/EBU-1 +// 0x00104900: AES/EBU-2 +// 0x00000060: sample rate conversion for AES/EBU input/output. +// 0x00000000: None +// 0x00000020: input signal is converted to system rate +// 0x00000040: output is slave to input, ignoring system rate +// 0x00000060: output is double rate than system rate +// 0x00000018: nominal rate of sampling clock. +// 0x00000000: 44.1 kHz +// 0x00000008: 48.0 kHz +// 0x00000010: 88.2 kHz +// 0x00000018: 96.0 kHz +// 0x00000007: source of sampling clock. +// 0x00000000: internal +// 0x00000001: ADAT on optical interface +// 0x00000002: AES/EBU on XLR +// 0x00000003: source packet header (SPH) +// 0x00000004: word clock on BNC +// 0x00000005: ADAT on Dsub 9pin + +#define CLK_896_STATUS_OFFSET 0x0b14 +#define CLK_896_STATUS_FLAG_FETCH_ENABLE 0x20000000 +#define CLK_896_STATUS_FLAG_OUTPUT_ON 0x03000000 +#define CLK_896_STATUS_MASK_SRC 0x00000007 +#define CLK_896_STATUS_FLAG_SRC_INTERNAL 0x00000000 +#define CLK_896_STATUS_FLAG_SRC_ADAT_ON_OPT 0x00000001 +#define CLK_896_STATUS_FLAG_SRC_AESEBU 0x00000002 +#define CLK_896_STATUS_FLAG_SRC_SPH 0x00000003 +#define CLK_896_STATUS_FLAG_SRC_WORD 0x00000004 +#define CLK_896_STATUS_FLAG_SRC_ADAT_ON_DSUB 0x00000005 +#define CLK_896_STATUS_MASK_RATE 0x00000018 +#define CLK_896_STATUS_FLAG_RATE_44100 0x00000000 +#define CLK_896_STATUS_FLAG_RATE_48000 0x00000008 +#define CLK_896_STATUS_FLAG_RATE_88200 0x00000010 +#define CLK_896_STATUS_FLAG_RATE_96000 0x00000018 + +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; +} + +static int parse_clock_rate_896(u32 data, unsigned int *rate) +{ + switch (data & CLK_896_STATUS_MASK_RATE) { + case CLK_896_STATUS_FLAG_RATE_44100: + *rate = 44100; + break; + case CLK_896_STATUS_FLAG_RATE_48000: + *rate = 48000; + break; + case CLK_896_STATUS_FLAG_RATE_88200: + *rate = 88200; + break; + case CLK_896_STATUS_FLAG_RATE_96000: + *rate = 96000; + break; + default: + return -ENXIO; + } + + return 0; +} + +static int get_clock_rate_896(struct snd_motu *motu, unsigned int *rate) +{ + __be32 reg; + int err; + + err = snd_motu_transaction_read(motu, CLK_896_STATUS_OFFSET, ®, sizeof(reg)); + if (err < 0) + return err; + return parse_clock_rate_896(be32_to_cpu(reg), rate); +} + +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 if (motu->spec == &snd_motu_spec_896) + return get_clock_rate_896(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)); +} + +static int set_clock_rate_896(struct snd_motu *motu, unsigned int rate) +{ + unsigned int flag; + __be32 reg; + u32 data; + int err; + + err = snd_motu_transaction_read(motu, CLK_896_STATUS_OFFSET, ®, sizeof(reg)); + if (err < 0) + return err; + data = be32_to_cpu(reg); + + switch (rate) { + case 44100: + flag = CLK_896_STATUS_FLAG_RATE_44100; + break; + case 48000: + flag = CLK_896_STATUS_FLAG_RATE_48000; + break; + case 88200: + flag = CLK_896_STATUS_FLAG_RATE_88200; + break; + case 96000: + flag = CLK_896_STATUS_FLAG_RATE_96000; + break; + default: + return -EINVAL; + } + + data &= ~CLK_896_STATUS_MASK_RATE; + data |= flag; + + reg = cpu_to_be32(data); + return snd_motu_transaction_write(motu, CLK_896_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 if (motu->spec == &snd_motu_spec_896) + return set_clock_rate_896(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; + + switch (data & CLK_828_STATUS_MASK_SRC) { + case CLK_828_STATUS_FLAG_SRC_ADAT_ON_OPT: + *src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT; + break; + case CLK_828_STATUS_FLAG_SRC_SPH: + *src = SND_MOTU_CLOCK_SOURCE_SPH; + break; + case CLK_828_STATUS_FLAG_SRC_SPDIF: + { + if (data & CLK_828_STATUS_FLAG_OPT_IN_IFACE_IS_SPDIF) + *src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX; + else + *src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT; + break; + } + case CLK_828_STATUS_FLAG_SRC_ADAT_ON_DSUB: + *src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB; + break; + case CLK_828_STATUS_FLAG_SRC_INTERNAL: + *src = SND_MOTU_CLOCK_SOURCE_INTERNAL; + break; + default: + return -ENXIO; + } + + return 0; +} + +static int get_clock_source_896(struct snd_motu *motu, enum snd_motu_clock_source *src) +{ + __be32 reg; + u32 data; + int err; + + err = snd_motu_transaction_read(motu, CLK_896_STATUS_OFFSET, ®, sizeof(reg)); + if (err < 0) + return err; + data = be32_to_cpu(reg); + + switch (data & CLK_896_STATUS_MASK_SRC) { + case CLK_896_STATUS_FLAG_SRC_INTERNAL: + *src = SND_MOTU_CLOCK_SOURCE_INTERNAL; + break; + case CLK_896_STATUS_FLAG_SRC_ADAT_ON_OPT: + *src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT; + break; + case CLK_896_STATUS_FLAG_SRC_AESEBU: + *src = SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR; + break; + case CLK_896_STATUS_FLAG_SRC_SPH: + *src = SND_MOTU_CLOCK_SOURCE_SPH; + break; + case CLK_896_STATUS_FLAG_SRC_WORD: + *src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC; + break; + case CLK_896_STATUS_FLAG_SRC_ADAT_ON_DSUB: + *src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB; + break; + default: + return -ENXIO; + } + + 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 if (motu->spec == &snd_motu_spec_896) + return get_clock_source_896(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_ENABLE_OUTPUT); + 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_ENABLE_OUTPUT; + } + + reg = cpu_to_be32(data); + return snd_motu_transaction_write(motu, CLK_828_STATUS_OFFSET, ®, sizeof(reg)); +} + +static int switch_fetching_mode_896(struct snd_motu *motu, bool enable) +{ + __be32 reg; + u32 data; + int err; + + err = snd_motu_transaction_read(motu, CLK_896_STATUS_OFFSET, ®, sizeof(reg)); + if (err < 0) + return err; + data = be32_to_cpu(reg); + + data &= ~CLK_896_STATUS_FLAG_FETCH_ENABLE; + if (enable) + data |= CLK_896_STATUS_FLAG_FETCH_ENABLE | CLK_896_STATUS_FLAG_OUTPUT_ON; + + reg = cpu_to_be32(data); + return snd_motu_transaction_write(motu, CLK_896_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 if (motu->spec == &snd_motu_spec_896) + return switch_fetching_mode_896(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; +} + +static int detect_packet_formats_896(struct snd_motu *motu) +{ + // 24bit PCM frames follow to source packet header without message chunk. + motu->tx_packet_formats.pcm_byte_offset = 4; + motu->rx_packet_formats.pcm_byte_offset = 4; + + // No message chunk in data block. + motu->tx_packet_formats.msg_chunks = 0; + motu->rx_packet_formats.msg_chunks = 0; + + // Always enable optical interface for ADAT signal since the device have no registers + // to refer to current configuration. + motu->tx_packet_formats.pcm_chunks[0] += 8; + motu->tx_packet_formats.pcm_chunks[1] += 8; + + motu->rx_packet_formats.pcm_chunks[0] += 8; + motu->rx_packet_formats.pcm_chunks[1] += 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 if (motu->spec == &snd_motu_spec_896) + return detect_packet_formats_896(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}, +}; + +const struct snd_motu_spec snd_motu_spec_896 = { + .name = "896", + .tx_fixed_pcm_chunks = {10, 10, 0}, + .rx_fixed_pcm_chunks = {10, 10, 0}, +}; |