421 lines
10 KiB
C
421 lines
10 KiB
C
/*
|
|
* oxfw-scs1x.c - a part of driver for OXFW970/971 based devices
|
|
*
|
|
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
|
|
* Copyright (c) 2015 Takashi Sakamoto <o-takashi@sakamocchi.jp>
|
|
*
|
|
* Licensed under the terms of the GNU General Public License, version 2.
|
|
*/
|
|
|
|
#include "oxfw.h"
|
|
|
|
#define HSS1394_ADDRESS 0xc007dedadadaULL
|
|
#define HSS1394_MAX_PACKET_SIZE 64
|
|
#define HSS1394_TAG_USER_DATA 0x00
|
|
#define HSS1394_TAG_CHANGE_ADDRESS 0xf1
|
|
|
|
struct fw_scs1x {
|
|
struct fw_address_handler hss_handler;
|
|
u8 input_escape_count;
|
|
struct snd_rawmidi_substream *input;
|
|
|
|
/* For MIDI playback. */
|
|
struct snd_rawmidi_substream *output;
|
|
bool output_idle;
|
|
u8 output_status;
|
|
u8 output_bytes;
|
|
bool output_escaped;
|
|
bool output_escape_high_nibble;
|
|
struct work_struct work;
|
|
wait_queue_head_t idle_wait;
|
|
u8 buffer[HSS1394_MAX_PACKET_SIZE];
|
|
bool transaction_running;
|
|
struct fw_transaction transaction;
|
|
unsigned int transaction_bytes;
|
|
bool error;
|
|
struct fw_device *fw_dev;
|
|
};
|
|
|
|
static const u8 sysex_escape_prefix[] = {
|
|
0xf0, /* SysEx begin */
|
|
0x00, 0x01, 0x60, /* Stanton DJ */
|
|
0x48, 0x53, 0x53, /* "HSS" */
|
|
};
|
|
|
|
static void midi_input_escaped_byte(struct snd_rawmidi_substream *stream,
|
|
u8 byte)
|
|
{
|
|
u8 nibbles[2];
|
|
|
|
nibbles[0] = byte >> 4;
|
|
nibbles[1] = byte & 0x0f;
|
|
snd_rawmidi_receive(stream, nibbles, 2);
|
|
}
|
|
|
|
static void midi_input_byte(struct fw_scs1x *scs,
|
|
struct snd_rawmidi_substream *stream, u8 byte)
|
|
{
|
|
const u8 eox = 0xf7;
|
|
|
|
if (scs->input_escape_count > 0) {
|
|
midi_input_escaped_byte(stream, byte);
|
|
scs->input_escape_count--;
|
|
if (scs->input_escape_count == 0)
|
|
snd_rawmidi_receive(stream, &eox, sizeof(eox));
|
|
} else if (byte == 0xf9) {
|
|
snd_rawmidi_receive(stream, sysex_escape_prefix,
|
|
ARRAY_SIZE(sysex_escape_prefix));
|
|
midi_input_escaped_byte(stream, 0x00);
|
|
midi_input_escaped_byte(stream, 0xf9);
|
|
scs->input_escape_count = 3;
|
|
} else {
|
|
snd_rawmidi_receive(stream, &byte, 1);
|
|
}
|
|
}
|
|
|
|
static void midi_input_packet(struct fw_scs1x *scs,
|
|
struct snd_rawmidi_substream *stream,
|
|
const u8 *data, unsigned int bytes)
|
|
{
|
|
unsigned int i;
|
|
const u8 eox = 0xf7;
|
|
|
|
if (data[0] == HSS1394_TAG_USER_DATA) {
|
|
for (i = 1; i < bytes; ++i)
|
|
midi_input_byte(scs, stream, data[i]);
|
|
} else {
|
|
snd_rawmidi_receive(stream, sysex_escape_prefix,
|
|
ARRAY_SIZE(sysex_escape_prefix));
|
|
for (i = 0; i < bytes; ++i)
|
|
midi_input_escaped_byte(stream, data[i]);
|
|
snd_rawmidi_receive(stream, &eox, sizeof(eox));
|
|
}
|
|
}
|
|
|
|
static void handle_hss(struct fw_card *card, struct fw_request *request,
|
|
int tcode, int destination, int source, int generation,
|
|
unsigned long long offset, void *data, size_t length,
|
|
void *callback_data)
|
|
{
|
|
struct fw_scs1x *scs = callback_data;
|
|
struct snd_rawmidi_substream *stream;
|
|
int rcode;
|
|
|
|
if (offset != scs->hss_handler.offset) {
|
|
rcode = RCODE_ADDRESS_ERROR;
|
|
goto end;
|
|
}
|
|
if (tcode != TCODE_WRITE_QUADLET_REQUEST &&
|
|
tcode != TCODE_WRITE_BLOCK_REQUEST) {
|
|
rcode = RCODE_TYPE_ERROR;
|
|
goto end;
|
|
}
|
|
|
|
if (length >= 1) {
|
|
stream = READ_ONCE(scs->input);
|
|
if (stream)
|
|
midi_input_packet(scs, stream, data, length);
|
|
}
|
|
|
|
rcode = RCODE_COMPLETE;
|
|
end:
|
|
fw_send_response(card, request, rcode);
|
|
}
|
|
|
|
static void scs_write_callback(struct fw_card *card, int rcode,
|
|
void *data, size_t length, void *callback_data)
|
|
{
|
|
struct fw_scs1x *scs = callback_data;
|
|
|
|
if (!rcode_is_permanent_error(rcode)) {
|
|
/* Don't retry for this data. */
|
|
if (rcode == RCODE_COMPLETE)
|
|
scs->transaction_bytes = 0;
|
|
} else {
|
|
scs->error = true;
|
|
}
|
|
|
|
scs->transaction_running = false;
|
|
schedule_work(&scs->work);
|
|
}
|
|
|
|
static bool is_valid_running_status(u8 status)
|
|
{
|
|
return status >= 0x80 && status <= 0xef;
|
|
}
|
|
|
|
static bool is_one_byte_cmd(u8 status)
|
|
{
|
|
return status == 0xf6 ||
|
|
status >= 0xf8;
|
|
}
|
|
|
|
static bool is_two_bytes_cmd(u8 status)
|
|
{
|
|
return (status >= 0xc0 && status <= 0xdf) ||
|
|
status == 0xf1 ||
|
|
status == 0xf3;
|
|
}
|
|
|
|
static bool is_three_bytes_cmd(u8 status)
|
|
{
|
|
return (status >= 0x80 && status <= 0xbf) ||
|
|
(status >= 0xe0 && status <= 0xef) ||
|
|
status == 0xf2;
|
|
}
|
|
|
|
static bool is_invalid_cmd(u8 status)
|
|
{
|
|
return status == 0xf4 ||
|
|
status == 0xf5 ||
|
|
status == 0xf9 ||
|
|
status == 0xfd;
|
|
}
|
|
|
|
static void scs_output_work(struct work_struct *work)
|
|
{
|
|
struct fw_scs1x *scs = container_of(work, struct fw_scs1x, work);
|
|
struct snd_rawmidi_substream *stream;
|
|
unsigned int i;
|
|
u8 byte;
|
|
int generation;
|
|
|
|
if (scs->transaction_running)
|
|
return;
|
|
|
|
stream = READ_ONCE(scs->output);
|
|
if (!stream || scs->error) {
|
|
scs->output_idle = true;
|
|
wake_up(&scs->idle_wait);
|
|
return;
|
|
}
|
|
|
|
if (scs->transaction_bytes > 0)
|
|
goto retry;
|
|
|
|
i = scs->output_bytes;
|
|
for (;;) {
|
|
if (snd_rawmidi_transmit(stream, &byte, 1) != 1) {
|
|
scs->output_bytes = i;
|
|
scs->output_idle = true;
|
|
wake_up(&scs->idle_wait);
|
|
return;
|
|
}
|
|
/*
|
|
* Convert from real MIDI to what I think the device expects (no
|
|
* running status, one command per packet, unescaped SysExs).
|
|
*/
|
|
if (scs->output_escaped && byte < 0x80) {
|
|
if (scs->output_escape_high_nibble) {
|
|
if (i < HSS1394_MAX_PACKET_SIZE) {
|
|
scs->buffer[i] = byte << 4;
|
|
scs->output_escape_high_nibble = false;
|
|
}
|
|
} else {
|
|
scs->buffer[i++] |= byte & 0x0f;
|
|
scs->output_escape_high_nibble = true;
|
|
}
|
|
} else if (byte < 0x80) {
|
|
if (i == 1) {
|
|
if (!is_valid_running_status(
|
|
scs->output_status))
|
|
continue;
|
|
scs->buffer[0] = HSS1394_TAG_USER_DATA;
|
|
scs->buffer[i++] = scs->output_status;
|
|
}
|
|
scs->buffer[i++] = byte;
|
|
if ((i == 3 && is_two_bytes_cmd(scs->output_status)) ||
|
|
(i == 4 && is_three_bytes_cmd(scs->output_status)))
|
|
break;
|
|
if (i == 1 + ARRAY_SIZE(sysex_escape_prefix) &&
|
|
!memcmp(scs->buffer + 1, sysex_escape_prefix,
|
|
ARRAY_SIZE(sysex_escape_prefix))) {
|
|
scs->output_escaped = true;
|
|
scs->output_escape_high_nibble = true;
|
|
i = 0;
|
|
}
|
|
if (i >= HSS1394_MAX_PACKET_SIZE)
|
|
i = 1;
|
|
} else if (byte == 0xf7) {
|
|
if (scs->output_escaped) {
|
|
if (i >= 1 && scs->output_escape_high_nibble &&
|
|
scs->buffer[0] !=
|
|
HSS1394_TAG_CHANGE_ADDRESS)
|
|
break;
|
|
} else {
|
|
if (i > 1 && scs->output_status == 0xf0) {
|
|
scs->buffer[i++] = 0xf7;
|
|
break;
|
|
}
|
|
}
|
|
i = 1;
|
|
scs->output_escaped = false;
|
|
} else if (!is_invalid_cmd(byte) && byte < 0xf8) {
|
|
i = 1;
|
|
scs->buffer[0] = HSS1394_TAG_USER_DATA;
|
|
scs->buffer[i++] = byte;
|
|
scs->output_status = byte;
|
|
scs->output_escaped = false;
|
|
if (is_one_byte_cmd(byte))
|
|
break;
|
|
}
|
|
}
|
|
scs->output_bytes = 1;
|
|
scs->output_escaped = false;
|
|
|
|
scs->transaction_bytes = i;
|
|
retry:
|
|
scs->transaction_running = true;
|
|
generation = scs->fw_dev->generation;
|
|
smp_rmb(); /* node_id vs. generation */
|
|
fw_send_request(scs->fw_dev->card, &scs->transaction,
|
|
TCODE_WRITE_BLOCK_REQUEST, scs->fw_dev->node_id,
|
|
generation, scs->fw_dev->max_speed, HSS1394_ADDRESS,
|
|
scs->buffer, scs->transaction_bytes,
|
|
scs_write_callback, scs);
|
|
}
|
|
|
|
static int midi_capture_open(struct snd_rawmidi_substream *stream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int midi_capture_close(struct snd_rawmidi_substream *stream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void midi_capture_trigger(struct snd_rawmidi_substream *stream, int up)
|
|
{
|
|
struct fw_scs1x *scs = stream->rmidi->private_data;
|
|
|
|
if (up) {
|
|
scs->input_escape_count = 0;
|
|
WRITE_ONCE(scs->input, stream);
|
|
} else {
|
|
WRITE_ONCE(scs->input, NULL);
|
|
}
|
|
}
|
|
|
|
static int midi_playback_open(struct snd_rawmidi_substream *stream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int midi_playback_close(struct snd_rawmidi_substream *stream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void midi_playback_trigger(struct snd_rawmidi_substream *stream, int up)
|
|
{
|
|
struct fw_scs1x *scs = stream->rmidi->private_data;
|
|
|
|
if (up) {
|
|
scs->output_status = 0;
|
|
scs->output_bytes = 1;
|
|
scs->output_escaped = false;
|
|
scs->output_idle = false;
|
|
scs->transaction_bytes = 0;
|
|
scs->error = false;
|
|
|
|
WRITE_ONCE(scs->output, stream);
|
|
schedule_work(&scs->work);
|
|
} else {
|
|
WRITE_ONCE(scs->output, NULL);
|
|
}
|
|
}
|
|
static void midi_playback_drain(struct snd_rawmidi_substream *stream)
|
|
{
|
|
struct fw_scs1x *scs = stream->rmidi->private_data;
|
|
|
|
wait_event(scs->idle_wait, scs->output_idle);
|
|
}
|
|
|
|
static int register_address(struct snd_oxfw *oxfw)
|
|
{
|
|
struct fw_scs1x *scs = oxfw->spec;
|
|
__be64 data;
|
|
|
|
data = cpu_to_be64(((u64)HSS1394_TAG_CHANGE_ADDRESS << 56) |
|
|
scs->hss_handler.offset);
|
|
return snd_fw_transaction(oxfw->unit, TCODE_WRITE_BLOCK_REQUEST,
|
|
HSS1394_ADDRESS, &data, sizeof(data), 0);
|
|
}
|
|
|
|
static void remove_scs1x(struct snd_rawmidi *rmidi)
|
|
{
|
|
struct fw_scs1x *scs = rmidi->private_data;
|
|
|
|
fw_core_remove_address_handler(&scs->hss_handler);
|
|
}
|
|
|
|
void snd_oxfw_scs1x_update(struct snd_oxfw *oxfw)
|
|
{
|
|
register_address(oxfw);
|
|
}
|
|
|
|
int snd_oxfw_scs1x_add(struct snd_oxfw *oxfw)
|
|
{
|
|
static const struct snd_rawmidi_ops midi_capture_ops = {
|
|
.open = midi_capture_open,
|
|
.close = midi_capture_close,
|
|
.trigger = midi_capture_trigger,
|
|
};
|
|
static const struct snd_rawmidi_ops midi_playback_ops = {
|
|
.open = midi_playback_open,
|
|
.close = midi_playback_close,
|
|
.trigger = midi_playback_trigger,
|
|
.drain = midi_playback_drain,
|
|
};
|
|
struct snd_rawmidi *rmidi;
|
|
struct fw_scs1x *scs;
|
|
int err;
|
|
|
|
scs = kzalloc(sizeof(struct fw_scs1x), GFP_KERNEL);
|
|
if (scs == NULL)
|
|
return -ENOMEM;
|
|
scs->fw_dev = fw_parent_device(oxfw->unit);
|
|
oxfw->spec = scs;
|
|
|
|
/* Allocate own handler for imcoming asynchronous transaction. */
|
|
scs->hss_handler.length = HSS1394_MAX_PACKET_SIZE;
|
|
scs->hss_handler.address_callback = handle_hss;
|
|
scs->hss_handler.callback_data = scs;
|
|
err = fw_core_add_address_handler(&scs->hss_handler,
|
|
&fw_high_memory_region);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = register_address(oxfw);
|
|
if (err < 0)
|
|
goto err_allocated;
|
|
|
|
/* Use unique name for backward compatibility to scs1x module. */
|
|
err = snd_rawmidi_new(oxfw->card, "SCS.1x", 0, 1, 1, &rmidi);
|
|
if (err < 0)
|
|
goto err_allocated;
|
|
rmidi->private_data = scs;
|
|
rmidi->private_free = remove_scs1x;
|
|
|
|
snprintf(rmidi->name, sizeof(rmidi->name),
|
|
"%s MIDI", oxfw->card->shortname);
|
|
|
|
rmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT |
|
|
SNDRV_RAWMIDI_INFO_OUTPUT |
|
|
SNDRV_RAWMIDI_INFO_DUPLEX;
|
|
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
|
|
&midi_capture_ops);
|
|
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
|
|
&midi_playback_ops);
|
|
|
|
INIT_WORK(&scs->work, scs_output_work);
|
|
init_waitqueue_head(&scs->idle_wait);
|
|
scs->output_idle = true;
|
|
|
|
return 0;
|
|
err_allocated:
|
|
fw_core_remove_address_handler(&scs->hss_handler);
|
|
return err;
|
|
}
|