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ubuntu-linux-kernel/sound/firewire/motu/motu-protocol-v3.c

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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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