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linux/sound/firewire/motu/motu-protocol-v3.c
Takashi Sakamoto 8b460c76bd ALSA: firewire-motu: add specification flag for position of flag for MIDI messages 
In protocols of MOTU FireWire series, when transferring MIDI messages,
transmitter set existence flag to one byte on first several quadlets. The
position differs depending on protocols and models, however two cases are
confirmed; in 5th byte and 8th byte from MSB side.

This commit adds a series of specification flag to describe them. When
the existence flag is in the 5th byte, SND_MOTU_SPEC_[R|T]X_MIDI_2ND_Q is
used. Else, another set of the flag is used. Here, '_Q' means quadlet.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-08-21 12:24:00 +02:00

307 lines
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/*
* motu-protocol-v3.c - a part of driver for MOTU FireWire series
*
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#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
static int 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, &reg,
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;
}
static int 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, &reg,
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, &reg,
sizeof(reg));
if (err < 0)
return err;
if (need_to_wait) {
/* Cost expensive. */
if (msleep_interruptible(4000) > 0)
return -EINTR;
}
return 0;
}
static int v3_get_clock_source(struct snd_motu *motu,
enum snd_motu_clock_source *src)
{
__be32 reg;
u32 data;
unsigned int val;
int err;
err = snd_motu_transaction_read(motu, V3_CLOCK_STATUS_OFFSET, &reg,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
val = data & V3_CLOCK_SOURCE_MASK;
if (val == 0x00) {
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
} else if (val == 0x01) {
*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;
} else if (val == 0x10) {
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
} else if (val == 0x18 || val == 0x19) {
err = snd_motu_transaction_read(motu, V3_OPT_IFACE_MODE_OFFSET,
&reg, sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
if (val == 0x18) {
if (data & 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 (data & 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;
}
} else {
*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
}
return 0;
}
static int 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, &reg,
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, &reg,
sizeof(reg));
}
static void calculate_fixed_part(struct snd_motu_packet_format *formats,
enum amdtp_stream_direction dir,
enum snd_motu_spec_flags flags,
unsigned char analog_ports)
{
unsigned char pcm_chunks[3] = {0, 0, 0};
formats->msg_chunks = 2;
pcm_chunks[0] = analog_ports;
pcm_chunks[1] = analog_ports;
if (flags & SND_MOTU_SPEC_SUPPORT_CLOCK_X4)
pcm_chunks[2] = analog_ports;
if (dir == AMDTP_IN_STREAM) {
if (flags & SND_MOTU_SPEC_TX_MICINST_CHUNK) {
pcm_chunks[0] += 2;
pcm_chunks[1] += 2;
if (flags & SND_MOTU_SPEC_SUPPORT_CLOCK_X4)
pcm_chunks[2] += 2;
}
if (flags & SND_MOTU_SPEC_TX_RETURN_CHUNK) {
pcm_chunks[0] += 2;
pcm_chunks[1] += 2;
if (flags & SND_MOTU_SPEC_SUPPORT_CLOCK_X4)
pcm_chunks[2] += 2;
}
if (flags & SND_MOTU_SPEC_TX_REVERB_CHUNK) {
pcm_chunks[0] += 2;
pcm_chunks[1] += 2;
}
} else {
/*
* Packets to v2 units transfer main-out-1/2 and phone-out-1/2.
*/
pcm_chunks[0] += 4;
pcm_chunks[1] += 4;
}
/*
* At least, packets have two data chunks for S/PDIF on coaxial
* interface.
*/
pcm_chunks[0] += 2;
pcm_chunks[1] += 2;
/*
* Fixed part consists of PCM chunks multiple of 4, with msg chunks. As
* a result, this part can includes empty data chunks.
*/
formats->fixed_part_pcm_chunks[0] = round_up(2 + pcm_chunks[0], 4) - 2;
formats->fixed_part_pcm_chunks[1] = round_up(2 + pcm_chunks[1], 4) - 2;
if (flags & SND_MOTU_SPEC_SUPPORT_CLOCK_X4)
formats->fixed_part_pcm_chunks[2] =
round_up(2 + pcm_chunks[2], 4) - 2;
}
static void calculate_differed_part(struct snd_motu_packet_format *formats,
enum snd_motu_spec_flags flags, u32 data,
u32 a_enable_mask, u32 a_no_adat_mask,
u32 b_enable_mask, u32 b_no_adat_mask)
{
unsigned char pcm_chunks[3] = {0, 0, 0};
int i;
if ((flags & SND_MOTU_SPEC_HAS_OPT_IFACE_A) && (data & a_enable_mask)) {
if (data & a_no_adat_mask) {
/*
* Additional two data chunks for S/PDIF on optical
* interface A. This includes empty data chunks.
*/
pcm_chunks[0] += 4;
pcm_chunks[1] += 4;
} else {
/*
* Additional data chunks for ADAT on optical interface
* A.
*/
pcm_chunks[0] += 8;
pcm_chunks[1] += 4;
}
}
if ((flags & SND_MOTU_SPEC_HAS_OPT_IFACE_B) && (data & b_enable_mask)) {
if (data & b_no_adat_mask) {
/*
* Additional two data chunks for S/PDIF on optical
* interface B. This includes empty data chunks.
*/
pcm_chunks[0] += 4;
pcm_chunks[1] += 4;
} else {
/*
* Additional data chunks for ADAT on optical interface
* B.
*/
pcm_chunks[0] += 8;
pcm_chunks[1] += 4;
}
}
for (i = 0; i < 3; ++i) {
if (pcm_chunks[i] > 0)
pcm_chunks[i] = round_up(pcm_chunks[i], 4);
formats->differed_part_pcm_chunks[i] = pcm_chunks[i];
}
}
static int v3_cache_packet_formats(struct snd_motu *motu)
{
__be32 reg;
u32 data;
int err;
err = snd_motu_transaction_read(motu, V3_OPT_IFACE_MODE_OFFSET, &reg,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
calculate_fixed_part(&motu->tx_packet_formats, AMDTP_IN_STREAM,
motu->spec->flags, motu->spec->analog_in_ports);
calculate_differed_part(&motu->tx_packet_formats,
motu->spec->flags, data,
V3_ENABLE_OPT_IN_IFACE_A, V3_NO_ADAT_OPT_IN_IFACE_A,
V3_ENABLE_OPT_IN_IFACE_B, V3_NO_ADAT_OPT_IN_IFACE_B);
calculate_fixed_part(&motu->rx_packet_formats, AMDTP_OUT_STREAM,
motu->spec->flags, motu->spec->analog_out_ports);
calculate_differed_part(&motu->rx_packet_formats,
motu->spec->flags, data,
V3_ENABLE_OPT_OUT_IFACE_A, V3_NO_ADAT_OPT_OUT_IFACE_A,
V3_ENABLE_OPT_OUT_IFACE_B, V3_NO_ADAT_OPT_OUT_IFACE_B);
motu->tx_packet_formats.pcm_byte_offset = 10;
motu->rx_packet_formats.pcm_byte_offset = 10;
return 0;
}
const struct snd_motu_protocol snd_motu_protocol_v3 = {
.get_clock_rate = v3_get_clock_rate,
.set_clock_rate = v3_set_clock_rate,
.get_clock_source = v3_get_clock_source,
.switch_fetching_mode = v3_switch_fetching_mode,
.cache_packet_formats = v3_cache_packet_formats,
};
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