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// SPDX-License-Identifier: GPL-2.0-only
/*
* motu-protocol-v2.c - a part of driver for MOTU FireWire series
*
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*/
#include "motu.h"
#define V2_CLOCK_STATUS_OFFSET 0x0b14
#define V2_CLOCK_RATE_MASK 0x00000038
#define V2_CLOCK_RATE_SHIFT 3
#define V2_CLOCK_SRC_MASK 0x00000007
#define V2_CLOCK_SRC_SHIFT 0
#define V2_CLOCK_FETCH_ENABLE 0x02000000
#define V2_CLOCK_MODEL_SPECIFIC 0x04000000
#define V2_IN_OUT_CONF_OFFSET 0x0c04
#define V2_OPT_OUT_IFACE_MASK 0x00000c00
#define V2_OPT_OUT_IFACE_SHIFT 10
#define V2_OPT_IN_IFACE_MASK 0x00000300
#define V2_OPT_IN_IFACE_SHIFT 8
#define V2_OPT_IFACE_MODE_NONE 0
#define V2_OPT_IFACE_MODE_ADAT 1
#define V2_OPT_IFACE_MODE_SPDIF 2
static int get_clock_rate(u32 data, unsigned int *rate)
{
unsigned int index = (data & V2_CLOCK_RATE_MASK) >> V2_CLOCK_RATE_SHIFT;
if (index >= ARRAY_SIZE(snd_motu_clock_rates))
return -EIO;
*rate = snd_motu_clock_rates[index];
return 0;
}
int snd_motu_protocol_v2_get_clock_rate(struct snd_motu *motu,
unsigned int *rate)
{
__be32 reg;
int err;
err = snd_motu_transaction_read(motu, V2_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
return get_clock_rate(be32_to_cpu(reg), rate);
}
int snd_motu_protocol_v2_set_clock_rate(struct snd_motu *motu,
unsigned int rate)
{
__be32 reg;
u32 data;
int i;
int err;
for (i = 0; i < ARRAY_SIZE(snd_motu_clock_rates); ++i) {
if (snd_motu_clock_rates[i] == rate)
break;
}
if (i == ARRAY_SIZE(snd_motu_clock_rates))
return -EINVAL;
err = snd_motu_transaction_read(motu, V2_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
data &= ~V2_CLOCK_RATE_MASK;
data |= i << V2_CLOCK_RATE_SHIFT;
reg = cpu_to_be32(data);
return snd_motu_transaction_write(motu, V2_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
}
static int detect_clock_source_optical_model(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
switch (data) {
case 0:
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
break;
case 1:
{
__be32 reg;
// To check the configuration of optical interface.
int err = snd_motu_transaction_read(motu, V2_IN_OUT_CONF_OFFSET,
®, sizeof(reg));
if (err < 0)
return err;
if (be32_to_cpu(reg) & 0x00000200)
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT;
else
*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT;
break;
}
case 2:
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
break;
case 3:
*src = SND_MOTU_CLOCK_SOURCE_SPH;
break;
case 4:
*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;
break;
case 5:
*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB;
break;
default:
*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
break;
}
return 0;
}
static int v2_detect_clock_source(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
switch (data) {
case 0:
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
break;
case 2:
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
break;
case 3:
*src = SND_MOTU_CLOCK_SOURCE_SPH;
break;
case 4:
*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;
break;
default:
*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
break;
}
return 0;
}
static int get_clock_source(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
data &= V2_CLOCK_SRC_MASK;
if (motu->spec == &snd_motu_spec_828mk2 ||
motu->spec == &snd_motu_spec_traveler)
return detect_clock_source_optical_model(motu, data, src);
else
return v2_detect_clock_source(motu, data, src);
}
int snd_motu_protocol_v2_get_clock_source(struct snd_motu *motu,
enum snd_motu_clock_source *src)
{
__be32 reg;
int err;
err = snd_motu_transaction_read(motu, V2_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
return get_clock_source(motu, be32_to_cpu(reg), src);
}
// Expected for Traveler and 896HD, which implements Altera Cyclone EP1C3.
static int switch_fetching_mode_cyclone(struct snd_motu *motu, u32 *data,
bool enable)
{
*data |= V2_CLOCK_MODEL_SPECIFIC;
return 0;
}
// For UltraLite and 8pre, which implements Xilinx Spartan XC3S200.
static int switch_fetching_mode_spartan(struct snd_motu *motu, u32 *data,
bool enable)
{
unsigned int rate;
enum snd_motu_clock_source src;
int err;
err = get_clock_source(motu, *data, &src);
if (err < 0)
return err;
err = get_clock_rate(*data, &rate);
if (err < 0)
return err;
if (src == SND_MOTU_CLOCK_SOURCE_SPH && rate > 48000)
*data |= V2_CLOCK_MODEL_SPECIFIC;
return 0;
}
int snd_motu_protocol_v2_switch_fetching_mode(struct snd_motu *motu,
bool enable)
{
if (motu->spec == &snd_motu_spec_828mk2) {
// 828mkII implements Altera ACEX 1K EP1K30. Nothing to do.
return 0;
} else {
__be32 reg;
u32 data;
int err;
err = snd_motu_transaction_read(motu, V2_CLOCK_STATUS_OFFSET,
®, sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
data &= ~(V2_CLOCK_FETCH_ENABLE | V2_CLOCK_MODEL_SPECIFIC);
if (enable)
data |= V2_CLOCK_FETCH_ENABLE;
if (motu->spec == &snd_motu_spec_traveler)
err = switch_fetching_mode_cyclone(motu, &data, enable);
else
err = switch_fetching_mode_spartan(motu, &data, enable);
if (err < 0)
return err;
reg = cpu_to_be32(data);
return snd_motu_transaction_write(motu, V2_CLOCK_STATUS_OFFSET,
®, sizeof(reg));
}
}
static int detect_packet_formats_828mk2(struct snd_motu *motu, u32 data)
{
if (((data & V2_OPT_IN_IFACE_MASK) >> V2_OPT_IN_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_ADAT) {
motu->tx_packet_formats.pcm_chunks[0] += 8;
motu->tx_packet_formats.pcm_chunks[1] += 4;
}
if (((data & V2_OPT_OUT_IFACE_MASK) >> V2_OPT_OUT_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_ADAT) {
motu->rx_packet_formats.pcm_chunks[0] += 8;
motu->rx_packet_formats.pcm_chunks[1] += 4;
}
return 0;
}
static int detect_packet_formats_traveler(struct snd_motu *motu, u32 data)
{
if (((data & V2_OPT_IN_IFACE_MASK) >> V2_OPT_IN_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_ADAT) {
motu->tx_packet_formats.pcm_chunks[0] += 8;
motu->tx_packet_formats.pcm_chunks[1] += 4;
}
if (((data & V2_OPT_OUT_IFACE_MASK) >> V2_OPT_OUT_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_ADAT) {
motu->rx_packet_formats.pcm_chunks[0] += 8;
motu->rx_packet_formats.pcm_chunks[1] += 4;
}
return 0;
}
static int detect_packet_formats_8pre(struct snd_motu *motu, u32 data)
{
if (((data & V2_OPT_IN_IFACE_MASK) >> V2_OPT_IN_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_ADAT) {
motu->tx_packet_formats.pcm_chunks[0] += 8;
motu->tx_packet_formats.pcm_chunks[1] += 8;
}
if (((data & V2_OPT_OUT_IFACE_MASK) >> V2_OPT_OUT_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_ADAT) {
motu->rx_packet_formats.pcm_chunks[0] += 8;
motu->rx_packet_formats.pcm_chunks[1] += 8;
}
return 0;
}
int snd_motu_protocol_v2_cache_packet_formats(struct snd_motu *motu)
{
__be32 reg;
u32 data;
int err;
motu->tx_packet_formats.pcm_byte_offset = 10;
motu->rx_packet_formats.pcm_byte_offset = 10;
motu->tx_packet_formats.msg_chunks = 2;
motu->rx_packet_formats.msg_chunks = 2;
err = snd_motu_transaction_read(motu, V2_IN_OUT_CONF_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
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_828mk2)
return detect_packet_formats_828mk2(motu, data);
else if (motu->spec == &snd_motu_spec_traveler)
return detect_packet_formats_traveler(motu, data);
else if (motu->spec == &snd_motu_spec_8pre)
return detect_packet_formats_8pre(motu, data);
else
return 0;
}
const struct snd_motu_spec snd_motu_spec_828mk2 = {
.name = "828mk2",
.protocol_version = SND_MOTU_PROTOCOL_V2,
.flags = SND_MOTU_SPEC_RX_MIDI_2ND_Q |
SND_MOTU_SPEC_TX_MIDI_2ND_Q,
.tx_fixed_pcm_chunks = {14, 14, 0},
.rx_fixed_pcm_chunks = {14, 14, 0},
};
const struct snd_motu_spec snd_motu_spec_traveler = {
.name = "Traveler",
.protocol_version = SND_MOTU_PROTOCOL_V2,
.flags = SND_MOTU_SPEC_RX_MIDI_2ND_Q |
SND_MOTU_SPEC_TX_MIDI_2ND_Q,
.tx_fixed_pcm_chunks = {14, 14, 8},
.rx_fixed_pcm_chunks = {14, 14, 8},
};
const struct snd_motu_spec snd_motu_spec_ultralite = {
.name = "UltraLite",
.protocol_version = SND_MOTU_PROTOCOL_V2,
.flags = SND_MOTU_SPEC_RX_MIDI_2ND_Q |
SND_MOTU_SPEC_TX_MIDI_2ND_Q,
.tx_fixed_pcm_chunks = {14, 14, 0},
.rx_fixed_pcm_chunks = {14, 14, 0},
};
const struct snd_motu_spec snd_motu_spec_8pre = {
.name = "8pre",
.protocol_version = SND_MOTU_PROTOCOL_V2,
.flags = SND_MOTU_SPEC_RX_MIDI_2ND_Q |
SND_MOTU_SPEC_TX_MIDI_2ND_Q,
.tx_fixed_pcm_chunks = {10, 6, 0},
.rx_fixed_pcm_chunks = {10, 6, 0},
};
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