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// SPDX-License-Identifier: GPL-2.0-only
/*
* motu-protocol-v3.c - a part of driver for MOTU FireWire series
*
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*/
#include <linux/delay.h>
#include "motu.h"
#define V3_CLOCK_STATUS_OFFSET 0x0b14
#define V3_FETCH_PCM_FRAMES 0x02000000
#define V3_CLOCK_RATE_MASK 0x0000ff00
#define V3_CLOCK_RATE_SHIFT 8
#define V3_CLOCK_SOURCE_MASK 0x000000ff
#define V3_OPT_IFACE_MODE_OFFSET 0x0c94
#define V3_ENABLE_OPT_IN_IFACE_A 0x00000001
#define V3_ENABLE_OPT_IN_IFACE_B 0x00000002
#define V3_ENABLE_OPT_OUT_IFACE_A 0x00000100
#define V3_ENABLE_OPT_OUT_IFACE_B 0x00000200
#define V3_NO_ADAT_OPT_IN_IFACE_A 0x00010000
#define V3_NO_ADAT_OPT_IN_IFACE_B 0x00100000
#define V3_NO_ADAT_OPT_OUT_IFACE_A 0x00040000
#define V3_NO_ADAT_OPT_OUT_IFACE_B 0x00400000
#define V3_MSG_FLAG_CLK_CHANGED 0x00000002
#define V3_CLK_WAIT_MSEC 4000
int snd_motu_protocol_v3_get_clock_rate(struct snd_motu *motu,
unsigned int *rate)
{
__be32 reg;
u32 data;
int err;
err = snd_motu_transaction_read(motu, V3_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
data = (data & V3_CLOCK_RATE_MASK) >> V3_CLOCK_RATE_SHIFT;
if (data >= ARRAY_SIZE(snd_motu_clock_rates))
return -EIO;
*rate = snd_motu_clock_rates[data];
return 0;
}
int snd_motu_protocol_v3_set_clock_rate(struct snd_motu *motu,
unsigned int rate)
{
__be32 reg;
u32 data;
bool need_to_wait;
int i, 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, V3_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
data &= ~(V3_CLOCK_RATE_MASK | V3_FETCH_PCM_FRAMES);
data |= i << V3_CLOCK_RATE_SHIFT;
need_to_wait = data != be32_to_cpu(reg);
reg = cpu_to_be32(data);
err = snd_motu_transaction_write(motu, V3_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
if (need_to_wait) {
int result;
motu->msg = 0;
result = wait_event_interruptible_timeout(motu->hwdep_wait,
motu->msg & V3_MSG_FLAG_CLK_CHANGED,
msecs_to_jiffies(V3_CLK_WAIT_MSEC));
if (result < 0)
return result;
if (result == 0)
return -ETIMEDOUT;
}
return 0;
}
static int detect_clock_source_828mk3(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
switch (data) {
case 0x00:
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
break;
case 0x01:
*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;
break;
case 0x02:
*src = SND_MOTU_CLOCK_SOURCE_SPH;
break;
case 0x10:
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
break;
case 0x18:
case 0x19:
{
__be32 reg;
u32 options;
int err;
err = snd_motu_transaction_read(motu,
V3_OPT_IFACE_MODE_OFFSET, ®, sizeof(reg));
if (err < 0)
return err;
options = be32_to_cpu(reg);
if (data == 0x18) {
if (options & V3_NO_ADAT_OPT_IN_IFACE_A)
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A;
else
*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A;
} else {
if (options & V3_NO_ADAT_OPT_IN_IFACE_B)
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B;
else
*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B;
}
break;
}
default:
*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
break;
}
return 0;
}
static int v3_detect_clock_source(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
switch (data) {
case 0x00:
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
break;
case 0x01:
*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;
break;
case 0x02:
*src = SND_MOTU_CLOCK_SOURCE_SPH;
break;
case 0x10:
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
break;
default:
*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
break;
}
return 0;
}
int snd_motu_protocol_v3_get_clock_source(struct snd_motu *motu,
enum snd_motu_clock_source *src)
{
__be32 reg;
u32 data;
int err;
err = snd_motu_transaction_read(motu, V3_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg) & V3_CLOCK_SOURCE_MASK;
if (motu->spec == &snd_motu_spec_828mk3)
return detect_clock_source_828mk3(motu, data, src);
else
return v3_detect_clock_source(motu, data, src);
}
int snd_motu_protocol_v3_switch_fetching_mode(struct snd_motu *motu,
bool enable)
{
__be32 reg;
u32 data;
int err;
err = snd_motu_transaction_read(motu, V3_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
if (err < 0)
return 0;
data = be32_to_cpu(reg);
if (enable)
data |= V3_FETCH_PCM_FRAMES;
else
data &= ~V3_FETCH_PCM_FRAMES;
reg = cpu_to_be32(data);
return snd_motu_transaction_write(motu, V3_CLOCK_STATUS_OFFSET, ®,
sizeof(reg));
}
static int detect_packet_formats_828mk3(struct snd_motu *motu, u32 data)
{
if (data & V3_ENABLE_OPT_IN_IFACE_A) {
if (data & V3_NO_ADAT_OPT_IN_IFACE_A) {
motu->tx_packet_formats.pcm_chunks[0] += 4;
motu->tx_packet_formats.pcm_chunks[1] += 4;
} else {
motu->tx_packet_formats.pcm_chunks[0] += 8;
motu->tx_packet_formats.pcm_chunks[1] += 4;
}
}
if (data & V3_ENABLE_OPT_IN_IFACE_B) {
if (data & V3_NO_ADAT_OPT_IN_IFACE_B) {
motu->tx_packet_formats.pcm_chunks[0] += 4;
motu->tx_packet_formats.pcm_chunks[1] += 4;
} else {
motu->tx_packet_formats.pcm_chunks[0] += 8;
motu->tx_packet_formats.pcm_chunks[1] += 4;
}
}
if (data & V3_ENABLE_OPT_OUT_IFACE_A) {
if (data & V3_NO_ADAT_OPT_OUT_IFACE_A) {
motu->rx_packet_formats.pcm_chunks[0] += 4;
motu->rx_packet_formats.pcm_chunks[1] += 4;
} else {
motu->rx_packet_formats.pcm_chunks[0] += 8;
motu->rx_packet_formats.pcm_chunks[1] += 4;
}
}
if (data & V3_ENABLE_OPT_OUT_IFACE_B) {
if (data & V3_NO_ADAT_OPT_OUT_IFACE_B) {
motu->rx_packet_formats.pcm_chunks[0] += 4;
motu->rx_packet_formats.pcm_chunks[1] += 4;
} else {
motu->rx_packet_formats.pcm_chunks[0] += 8;
motu->rx_packet_formats.pcm_chunks[1] += 4;
}
}
return 0;
}
int snd_motu_protocol_v3_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, V3_OPT_IFACE_MODE_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_828mk3)
return detect_packet_formats_828mk3(motu, data);
else
return 0;
}
const struct snd_motu_spec snd_motu_spec_828mk3 = {
.name = "828mk3",
.protocol_version = SND_MOTU_PROTOCOL_V3,
.flags = SND_MOTU_SPEC_RX_MIDI_3RD_Q |
SND_MOTU_SPEC_TX_MIDI_3RD_Q,
.tx_fixed_pcm_chunks = {18, 18, 14},
.rx_fixed_pcm_chunks = {14, 14, 10},
};
const struct snd_motu_spec snd_motu_spec_ultralite_mk3 = {
.name = "UltraLiteMk3",
.protocol_version = SND_MOTU_PROTOCOL_V3,
.flags = SND_MOTU_SPEC_RX_MIDI_3RD_Q |
SND_MOTU_SPEC_TX_MIDI_3RD_Q,
.tx_fixed_pcm_chunks = {18, 14, 10},
.rx_fixed_pcm_chunks = {14, 14, 14},
};
const struct snd_motu_spec snd_motu_spec_audio_express = {
.name = "AudioExpress",
.protocol_version = SND_MOTU_PROTOCOL_V3,
.flags = SND_MOTU_SPEC_RX_MIDI_2ND_Q |
SND_MOTU_SPEC_TX_MIDI_3RD_Q,
.tx_fixed_pcm_chunks = {10, 10, 0},
.rx_fixed_pcm_chunks = {10, 10, 0},
};
const struct snd_motu_spec snd_motu_spec_4pre = {
.name = "4pre",
.protocol_version = SND_MOTU_PROTOCOL_V3,
.tx_fixed_pcm_chunks = {10, 10, 0},
.rx_fixed_pcm_chunks = {10, 10, 0},
};
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