mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 04:34:08 +08:00
b5c21c8470
This back-merge is necessary for adjusting the latest FireWire fix with the recent refactoring in 5.3 development branch. Signed-off-by: Takashi Iwai <tiwai@suse.de>
441 lines
10 KiB
C
441 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// ff-protocol-latter - a part of driver for RME Fireface series
|
|
//
|
|
// Copyright (c) 2019 Takashi Sakamoto
|
|
//
|
|
// Licensed under the terms of the GNU General Public License, version 2.
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include "ff.h"
|
|
|
|
#define LATTER_STF 0xffff00000004ULL
|
|
#define LATTER_ISOC_CHANNELS 0xffff00000008ULL
|
|
#define LATTER_ISOC_START 0xffff0000000cULL
|
|
#define LATTER_FETCH_MODE 0xffff00000010ULL
|
|
#define LATTER_SYNC_STATUS 0x0000801c0000ULL
|
|
|
|
static int parse_clock_bits(u32 data, unsigned int *rate,
|
|
enum snd_ff_clock_src *src)
|
|
{
|
|
static const struct {
|
|
unsigned int rate;
|
|
u32 flag;
|
|
} *rate_entry, rate_entries[] = {
|
|
{ 32000, 0x00000000, },
|
|
{ 44100, 0x01000000, },
|
|
{ 48000, 0x02000000, },
|
|
{ 64000, 0x04000000, },
|
|
{ 88200, 0x05000000, },
|
|
{ 96000, 0x06000000, },
|
|
{ 128000, 0x08000000, },
|
|
{ 176400, 0x09000000, },
|
|
{ 192000, 0x0a000000, },
|
|
};
|
|
static const struct {
|
|
enum snd_ff_clock_src src;
|
|
u32 flag;
|
|
} *clk_entry, clk_entries[] = {
|
|
{ SND_FF_CLOCK_SRC_SPDIF, 0x00000200, },
|
|
{ SND_FF_CLOCK_SRC_ADAT1, 0x00000400, },
|
|
{ SND_FF_CLOCK_SRC_WORD, 0x00000600, },
|
|
{ SND_FF_CLOCK_SRC_INTERNAL, 0x00000e00, },
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rate_entries); ++i) {
|
|
rate_entry = rate_entries + i;
|
|
if ((data & 0x0f000000) == rate_entry->flag) {
|
|
*rate = rate_entry->rate;
|
|
break;
|
|
}
|
|
}
|
|
if (i == ARRAY_SIZE(rate_entries))
|
|
return -EIO;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(clk_entries); ++i) {
|
|
clk_entry = clk_entries + i;
|
|
if ((data & 0x000e00) == clk_entry->flag) {
|
|
*src = clk_entry->src;
|
|
break;
|
|
}
|
|
}
|
|
if (i == ARRAY_SIZE(clk_entries))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int latter_get_clock(struct snd_ff *ff, unsigned int *rate,
|
|
enum snd_ff_clock_src *src)
|
|
{
|
|
__le32 reg;
|
|
u32 data;
|
|
int err;
|
|
|
|
err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
|
|
LATTER_SYNC_STATUS, ®, sizeof(reg), 0);
|
|
if (err < 0)
|
|
return err;
|
|
data = le32_to_cpu(reg);
|
|
|
|
return parse_clock_bits(data, rate, src);
|
|
}
|
|
|
|
static int latter_switch_fetching_mode(struct snd_ff *ff, bool enable)
|
|
{
|
|
u32 data;
|
|
__le32 reg;
|
|
|
|
if (enable)
|
|
data = 0x00000000;
|
|
else
|
|
data = 0xffffffff;
|
|
reg = cpu_to_le32(data);
|
|
|
|
return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
|
|
LATTER_FETCH_MODE, ®, sizeof(reg), 0);
|
|
}
|
|
|
|
static int latter_allocate_resources(struct snd_ff *ff, unsigned int rate)
|
|
{
|
|
enum snd_ff_stream_mode mode;
|
|
unsigned int code;
|
|
__le32 reg;
|
|
unsigned int count;
|
|
int i;
|
|
int err;
|
|
|
|
// Set the number of data blocks transferred in a second.
|
|
if (rate % 32000 == 0)
|
|
code = 0x00;
|
|
else if (rate % 44100 == 0)
|
|
code = 0x02;
|
|
else if (rate % 48000 == 0)
|
|
code = 0x04;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (rate >= 64000 && rate < 128000)
|
|
code |= 0x08;
|
|
else if (rate >= 128000 && rate < 192000)
|
|
code |= 0x10;
|
|
|
|
reg = cpu_to_le32(code);
|
|
err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
|
|
LATTER_STF, ®, sizeof(reg), 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
// Confirm to shift transmission clock.
|
|
count = 0;
|
|
while (count++ < 10) {
|
|
unsigned int curr_rate;
|
|
enum snd_ff_clock_src src;
|
|
|
|
err = latter_get_clock(ff, &curr_rate, &src);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (curr_rate == rate)
|
|
break;
|
|
}
|
|
if (count == 10)
|
|
return -ETIMEDOUT;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); ++i) {
|
|
if (rate == amdtp_rate_table[i])
|
|
break;
|
|
}
|
|
if (i == ARRAY_SIZE(amdtp_rate_table))
|
|
return -EINVAL;
|
|
|
|
err = snd_ff_stream_get_multiplier_mode(i, &mode);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
// Keep resources for in-stream.
|
|
ff->tx_resources.channels_mask = 0x00000000000000ffuLL;
|
|
err = fw_iso_resources_allocate(&ff->tx_resources,
|
|
amdtp_stream_get_max_payload(&ff->tx_stream),
|
|
fw_parent_device(ff->unit)->max_speed);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
// Keep resources for out-stream.
|
|
ff->rx_resources.channels_mask = 0x00000000000000ffuLL;
|
|
err = fw_iso_resources_allocate(&ff->rx_resources,
|
|
amdtp_stream_get_max_payload(&ff->rx_stream),
|
|
fw_parent_device(ff->unit)->max_speed);
|
|
if (err < 0)
|
|
fw_iso_resources_free(&ff->tx_resources);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int latter_begin_session(struct snd_ff *ff, unsigned int rate)
|
|
{
|
|
unsigned int generation = ff->rx_resources.generation;
|
|
unsigned int flag;
|
|
u32 data;
|
|
__le32 reg;
|
|
int err;
|
|
|
|
if (rate >= 32000 && rate <= 48000)
|
|
flag = 0x92;
|
|
else if (rate >= 64000 && rate <= 96000)
|
|
flag = 0x8e;
|
|
else if (rate >= 128000 && rate <= 192000)
|
|
flag = 0x8c;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (generation != fw_parent_device(ff->unit)->card->generation) {
|
|
err = fw_iso_resources_update(&ff->tx_resources);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = fw_iso_resources_update(&ff->rx_resources);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
data = (ff->tx_resources.channel << 8) | ff->rx_resources.channel;
|
|
reg = cpu_to_le32(data);
|
|
err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
|
|
LATTER_ISOC_CHANNELS, ®, sizeof(reg), 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
// Always use the maximum number of data channels in data block of
|
|
// packet.
|
|
reg = cpu_to_le32(flag);
|
|
return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
|
|
LATTER_ISOC_START, ®, sizeof(reg), 0);
|
|
}
|
|
|
|
static void latter_finish_session(struct snd_ff *ff)
|
|
{
|
|
__le32 reg;
|
|
|
|
reg = cpu_to_le32(0x00000000);
|
|
snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
|
|
LATTER_ISOC_START, ®, sizeof(reg), 0);
|
|
}
|
|
|
|
static void latter_dump_status(struct snd_ff *ff, struct snd_info_buffer *buffer)
|
|
{
|
|
static const struct {
|
|
char *const label;
|
|
u32 locked_mask;
|
|
u32 synced_mask;
|
|
} *clk_entry, clk_entries[] = {
|
|
{ "S/PDIF", 0x00000001, 0x00000010, },
|
|
{ "ADAT", 0x00000002, 0x00000020, },
|
|
{ "WDClk", 0x00000004, 0x00000040, },
|
|
};
|
|
__le32 reg;
|
|
u32 data;
|
|
unsigned int rate;
|
|
enum snd_ff_clock_src src;
|
|
const char *label;
|
|
int i;
|
|
int err;
|
|
|
|
err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
|
|
LATTER_SYNC_STATUS, ®, sizeof(reg), 0);
|
|
if (err < 0)
|
|
return;
|
|
data = le32_to_cpu(reg);
|
|
|
|
snd_iprintf(buffer, "External source detection:\n");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(clk_entries); ++i) {
|
|
clk_entry = clk_entries + i;
|
|
snd_iprintf(buffer, "%s: ", clk_entry->label);
|
|
if (data & clk_entry->locked_mask) {
|
|
if (data & clk_entry->synced_mask)
|
|
snd_iprintf(buffer, "sync\n");
|
|
else
|
|
snd_iprintf(buffer, "lock\n");
|
|
} else {
|
|
snd_iprintf(buffer, "none\n");
|
|
}
|
|
}
|
|
|
|
err = parse_clock_bits(data, &rate, &src);
|
|
if (err < 0)
|
|
return;
|
|
label = snd_ff_proc_get_clk_label(src);
|
|
if (!label)
|
|
return;
|
|
|
|
snd_iprintf(buffer, "Referred clock: %s %d\n", label, rate);
|
|
}
|
|
|
|
// NOTE: transactions are transferred within 0x00-0x7f in allocated range of
|
|
// address. This seems to be for check of discontinuity in receiver side.
|
|
//
|
|
// Like Fireface 400, drivers can select one of 4 options for lower 4 bytes of
|
|
// destination address by bit flags in quadlet register (little endian) at
|
|
// 0x'ffff'0000'0014:
|
|
//
|
|
// bit flags: offset of destination address
|
|
// - 0x00002000: 0x'....'....'0000'0000
|
|
// - 0x00004000: 0x'....'....'0000'0080
|
|
// - 0x00008000: 0x'....'....'0000'0100
|
|
// - 0x00010000: 0x'....'....'0000'0180
|
|
//
|
|
// Drivers can suppress the device to transfer asynchronous transactions by
|
|
// clear these bit flags.
|
|
//
|
|
// Actually, the register is write-only and includes the other settings such as
|
|
// input attenuation. This driver allocates for the first option
|
|
// (0x'....'....'0000'0000) and expects userspace application to configure the
|
|
// register for it.
|
|
static void latter_handle_midi_msg(struct snd_ff *ff, unsigned int offset,
|
|
__le32 *buf, size_t length)
|
|
{
|
|
u32 data = le32_to_cpu(*buf);
|
|
unsigned int index = (data & 0x000000f0) >> 4;
|
|
u8 byte[3];
|
|
struct snd_rawmidi_substream *substream;
|
|
unsigned int len;
|
|
|
|
if (index >= ff->spec->midi_in_ports)
|
|
return;
|
|
|
|
switch (data & 0x0000000f) {
|
|
case 0x00000008:
|
|
case 0x00000009:
|
|
case 0x0000000a:
|
|
case 0x0000000b:
|
|
case 0x0000000e:
|
|
len = 3;
|
|
break;
|
|
case 0x0000000c:
|
|
case 0x0000000d:
|
|
len = 2;
|
|
break;
|
|
default:
|
|
len = data & 0x00000003;
|
|
if (len == 0)
|
|
len = 3;
|
|
break;
|
|
}
|
|
|
|
byte[0] = (data & 0x0000ff00) >> 8;
|
|
byte[1] = (data & 0x00ff0000) >> 16;
|
|
byte[2] = (data & 0xff000000) >> 24;
|
|
|
|
substream = READ_ONCE(ff->tx_midi_substreams[index]);
|
|
if (substream)
|
|
snd_rawmidi_receive(substream, byte, len);
|
|
}
|
|
|
|
/*
|
|
* When return minus value, given argument is not MIDI status.
|
|
* When return 0, given argument is a beginning of system exclusive.
|
|
* When return the others, given argument is MIDI data.
|
|
*/
|
|
static inline int calculate_message_bytes(u8 status)
|
|
{
|
|
switch (status) {
|
|
case 0xf6: /* Tune request. */
|
|
case 0xf8: /* Timing clock. */
|
|
case 0xfa: /* Start. */
|
|
case 0xfb: /* Continue. */
|
|
case 0xfc: /* Stop. */
|
|
case 0xfe: /* Active sensing. */
|
|
case 0xff: /* System reset. */
|
|
return 1;
|
|
case 0xf1: /* MIDI time code quarter frame. */
|
|
case 0xf3: /* Song select. */
|
|
return 2;
|
|
case 0xf2: /* Song position pointer. */
|
|
return 3;
|
|
case 0xf0: /* Exclusive. */
|
|
return 0;
|
|
case 0xf7: /* End of exclusive. */
|
|
break;
|
|
case 0xf4: /* Undefined. */
|
|
case 0xf5: /* Undefined. */
|
|
case 0xf9: /* Undefined. */
|
|
case 0xfd: /* Undefined. */
|
|
break;
|
|
default:
|
|
switch (status & 0xf0) {
|
|
case 0x80: /* Note on. */
|
|
case 0x90: /* Note off. */
|
|
case 0xa0: /* Polyphonic key pressure. */
|
|
case 0xb0: /* Control change and Mode change. */
|
|
case 0xe0: /* Pitch bend change. */
|
|
return 3;
|
|
case 0xc0: /* Program change. */
|
|
case 0xd0: /* Channel pressure. */
|
|
return 2;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int latter_fill_midi_msg(struct snd_ff *ff,
|
|
struct snd_rawmidi_substream *substream,
|
|
unsigned int port)
|
|
{
|
|
u32 data = {0};
|
|
u8 *buf = (u8 *)&data;
|
|
int consumed;
|
|
|
|
buf[0] = port << 4;
|
|
consumed = snd_rawmidi_transmit_peek(substream, buf + 1, 3);
|
|
if (consumed <= 0)
|
|
return consumed;
|
|
|
|
if (!ff->on_sysex[port]) {
|
|
if (buf[1] != 0xf0) {
|
|
if (consumed < calculate_message_bytes(buf[1]))
|
|
return 0;
|
|
} else {
|
|
// The beginning of exclusives.
|
|
ff->on_sysex[port] = true;
|
|
}
|
|
|
|
buf[0] |= consumed;
|
|
} else {
|
|
if (buf[1] != 0xf7) {
|
|
if (buf[2] == 0xf7 || buf[3] == 0xf7) {
|
|
// Transfer end code at next time.
|
|
consumed -= 1;
|
|
}
|
|
|
|
buf[0] |= consumed;
|
|
} else {
|
|
// The end of exclusives.
|
|
ff->on_sysex[port] = false;
|
|
consumed = 1;
|
|
buf[0] |= 0x0f;
|
|
}
|
|
}
|
|
|
|
ff->msg_buf[port][0] = cpu_to_le32(data);
|
|
ff->rx_bytes[port] = consumed;
|
|
|
|
return 1;
|
|
}
|
|
|
|
const struct snd_ff_protocol snd_ff_protocol_latter = {
|
|
.handle_midi_msg = latter_handle_midi_msg,
|
|
.fill_midi_msg = latter_fill_midi_msg,
|
|
.get_clock = latter_get_clock,
|
|
.switch_fetching_mode = latter_switch_fetching_mode,
|
|
.allocate_resources = latter_allocate_resources,
|
|
.begin_session = latter_begin_session,
|
|
.finish_session = latter_finish_session,
|
|
.dump_status = latter_dump_status,
|
|
};
|