ALSA: firewire: add Stanton SCS.1d/1m driver
Add a MIDI driver for the Stanton FireWire DJ controllers. Tested-by: Sean M. Pappalardo - D.J. Pegasus <spappalardo@mixxx.org> Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
Родитель
a0d271cbfe
Коммит
1999c3a035
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@ -33,4 +33,17 @@ config SND_ISIGHT
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To compile this driver as a module, choose M here: the module
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will be called snd-isight.
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config SND_SCS1X
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tristate "Stanton Control System 1 MIDI"
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select SND_PCM
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select SND_RAWMIDI
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select SND_FIREWIRE_LIB
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help
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Say Y here to include support for the MIDI ports of the Stanton
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SCS.1d/SCS.1m DJ controllers. (SCS.1m audio is still handled
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by FFADO.)
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To compile this driver as a module, choose M here: the module
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will be called snd-scs1x.
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endif # SND_FIREWIRE
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@ -2,7 +2,9 @@ snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \
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fcp.o cmp.o amdtp.o
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snd-firewire-speakers-objs := speakers.o
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snd-isight-objs := isight.o
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snd-scs1x-objs := scs1x.o
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obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o
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obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o
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obj-$(CONFIG_SND_ISIGHT) += snd-isight.o
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obj-$(CONFIG_SND_SCS1X) += snd-scs1x.o
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@ -0,0 +1,527 @@
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/*
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* Stanton Control System 1 MIDI driver
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*
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* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include <linux/device.h>
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#include <linux/firewire.h>
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#include <linux/firewire-constants.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/wait.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/rawmidi.h>
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#include "lib.h"
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#define OUI_STANTON 0x001260
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#define MODEL_SCS_1M 0x001000
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#define MODEL_SCS_1D 0x002000
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#define HSS1394_ADDRESS 0xc007dedadadaULL
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#define HSS1394_MAX_PACKET_SIZE 64
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#define HSS1394_TAG_USER_DATA 0x00
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#define HSS1394_TAG_CHANGE_ADDRESS 0xf1
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struct scs {
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struct snd_card *card;
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struct fw_unit *unit;
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struct fw_address_handler hss_handler;
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struct fw_transaction transaction;
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bool transaction_running;
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bool output_idle;
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u8 output_status;
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u8 output_bytes;
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bool output_escaped;
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bool output_escape_high_nibble;
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u8 input_escape_count;
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struct snd_rawmidi_substream *output;
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struct snd_rawmidi_substream *input;
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struct tasklet_struct tasklet;
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wait_queue_head_t idle_wait;
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u8 *buffer;
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};
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static const u8 sysex_escape_prefix[] = {
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0xf0, /* SysEx begin */
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0x00, 0x01, 0x60, /* Stanton DJ */
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0x48, 0x53, 0x53, /* "HSS" */
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};
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static int scs_output_open(struct snd_rawmidi_substream *stream)
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{
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struct scs *scs = stream->rmidi->private_data;
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scs->output_status = 0;
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scs->output_bytes = 1;
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scs->output_escaped = false;
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return 0;
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}
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static int scs_output_close(struct snd_rawmidi_substream *stream)
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{
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return 0;
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}
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static void scs_output_trigger(struct snd_rawmidi_substream *stream, int up)
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{
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struct scs *scs = stream->rmidi->private_data;
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ACCESS_ONCE(scs->output) = up ? stream : NULL;
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if (up) {
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scs->output_idle = false;
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tasklet_schedule(&scs->tasklet);
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}
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}
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static void scs_write_callback(struct fw_card *card, int rcode,
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void *data, size_t length, void *callback_data)
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{
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struct scs *scs = callback_data;
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if (rcode == RCODE_GENERATION) {
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/* TODO: retry this packet */
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}
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scs->transaction_running = false;
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tasklet_schedule(&scs->tasklet);
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}
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static bool is_valid_running_status(u8 status)
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{
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return status >= 0x80 && status <= 0xef;
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}
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static bool is_one_byte_cmd(u8 status)
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{
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return status == 0xf6 ||
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status >= 0xf8;
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}
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static bool is_two_bytes_cmd(u8 status)
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{
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return (status >= 0xc0 && status <= 0xdf) ||
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status == 0xf1 ||
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status == 0xf3;
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}
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static bool is_three_bytes_cmd(u8 status)
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{
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return (status >= 0x80 && status <= 0xbf) ||
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(status >= 0xe0 && status <= 0xef) ||
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status == 0xf2;
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}
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static bool is_invalid_cmd(u8 status)
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{
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return status == 0xf4 ||
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status == 0xf5 ||
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status == 0xf9 ||
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status == 0xfd;
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}
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static void scs_output_tasklet(unsigned long data)
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{
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struct scs *scs = (void *)data;
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struct snd_rawmidi_substream *stream;
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unsigned int i;
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u8 byte;
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struct fw_device *dev;
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int generation;
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if (scs->transaction_running)
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return;
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stream = ACCESS_ONCE(scs->output);
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if (!stream) {
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scs->output_idle = true;
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wake_up(&scs->idle_wait);
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return;
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}
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i = scs->output_bytes;
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for (;;) {
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if (snd_rawmidi_transmit(stream, &byte, 1) != 1) {
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scs->output_bytes = i;
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scs->output_idle = true;
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wake_up(&scs->idle_wait);
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return;
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}
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/*
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* Convert from real MIDI to what I think the device expects (no
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* running status, one command per packet, unescaped SysExs).
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*/
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if (scs->output_escaped && byte < 0x80) {
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if (scs->output_escape_high_nibble) {
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if (i < HSS1394_MAX_PACKET_SIZE) {
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scs->buffer[i] = byte << 4;
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scs->output_escape_high_nibble = false;
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}
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} else {
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scs->buffer[i++] |= byte & 0x0f;
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scs->output_escape_high_nibble = true;
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}
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} else if (byte < 0x80) {
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if (i == 1) {
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if (!is_valid_running_status(scs->output_status))
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continue;
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scs->buffer[0] = HSS1394_TAG_USER_DATA;
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scs->buffer[i++] = scs->output_status;
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}
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scs->buffer[i++] = byte;
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if ((i == 3 && is_two_bytes_cmd(scs->output_status)) ||
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(i == 4 && is_three_bytes_cmd(scs->output_status)))
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break;
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if (i == 1 + ARRAY_SIZE(sysex_escape_prefix) &&
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!memcmp(scs->buffer + 1, sysex_escape_prefix,
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ARRAY_SIZE(sysex_escape_prefix))) {
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scs->output_escaped = true;
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scs->output_escape_high_nibble = true;
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i = 0;
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}
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if (i >= HSS1394_MAX_PACKET_SIZE)
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i = 1;
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} else if (byte == 0xf7) {
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if (scs->output_escaped) {
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if (i >= 1 && scs->output_escape_high_nibble &&
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scs->buffer[0] != HSS1394_TAG_CHANGE_ADDRESS)
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break;
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} else {
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if (i > 1 && scs->output_status == 0xf0) {
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scs->buffer[i++] = 0xf7;
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break;
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}
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}
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i = 1;
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scs->output_escaped = false;
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} else if (!is_invalid_cmd(byte) &&
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byte < 0xf8) {
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i = 1;
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scs->buffer[0] = HSS1394_TAG_USER_DATA;
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scs->buffer[i++] = byte;
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scs->output_status = byte;
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scs->output_escaped = false;
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if (is_one_byte_cmd(byte))
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break;
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}
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}
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scs->output_bytes = 1;
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scs->output_escaped = false;
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scs->transaction_running = true;
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dev = fw_parent_device(scs->unit);
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generation = dev->generation;
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smp_rmb(); /* node_id vs. generation */
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fw_send_request(dev->card, &scs->transaction, TCODE_WRITE_BLOCK_REQUEST,
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dev->node_id, generation, dev->max_speed,
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HSS1394_ADDRESS, scs->buffer, i,
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scs_write_callback, scs);
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}
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static void scs_output_drain(struct snd_rawmidi_substream *stream)
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{
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struct scs *scs = stream->rmidi->private_data;
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wait_event(scs->idle_wait, scs->output_idle);
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}
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static struct snd_rawmidi_ops output_ops = {
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.open = scs_output_open,
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.close = scs_output_close,
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.trigger = scs_output_trigger,
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.drain = scs_output_drain,
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};
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static int scs_input_open(struct snd_rawmidi_substream *stream)
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{
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struct scs *scs = stream->rmidi->private_data;
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scs->input_escape_count = 0;
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return 0;
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}
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static int scs_input_close(struct snd_rawmidi_substream *stream)
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{
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return 0;
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}
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static void scs_input_trigger(struct snd_rawmidi_substream *stream, int up)
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{
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struct scs *scs = stream->rmidi->private_data;
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ACCESS_ONCE(scs->input) = up ? stream : NULL;
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}
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static void scs_input_escaped_byte(struct snd_rawmidi_substream *stream,
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u8 byte)
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{
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u8 nibbles[2];
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nibbles[0] = byte >> 4;
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nibbles[1] = byte & 0x0f;
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snd_rawmidi_receive(stream, nibbles, 2);
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}
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static void scs_input_midi_byte(struct scs *scs,
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struct snd_rawmidi_substream *stream,
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u8 byte)
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{
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if (scs->input_escape_count > 0) {
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scs_input_escaped_byte(stream, byte);
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scs->input_escape_count--;
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if (scs->input_escape_count == 0)
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snd_rawmidi_receive(stream, (const u8[]) { 0xf7 }, 1);
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} else if (byte == 0xf9) {
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snd_rawmidi_receive(stream, sysex_escape_prefix,
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ARRAY_SIZE(sysex_escape_prefix));
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scs_input_escaped_byte(stream, 0x00);
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scs_input_escaped_byte(stream, 0xf9);
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scs->input_escape_count = 3;
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} else {
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snd_rawmidi_receive(stream, &byte, 1);
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}
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}
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static void scs_input_packet(struct scs *scs,
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struct snd_rawmidi_substream *stream,
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const u8 *data, unsigned int bytes)
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{
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unsigned int i;
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if (data[0] == HSS1394_TAG_USER_DATA) {
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for (i = 1; i < bytes; ++i)
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scs_input_midi_byte(scs, stream, data[i]);
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} else {
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snd_rawmidi_receive(stream, sysex_escape_prefix,
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ARRAY_SIZE(sysex_escape_prefix));
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for (i = 0; i < bytes; ++i)
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scs_input_escaped_byte(stream, data[i]);
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snd_rawmidi_receive(stream, (const u8[]) { 0xf7 }, 1);
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}
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}
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static struct snd_rawmidi_ops input_ops = {
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.open = scs_input_open,
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.close = scs_input_close,
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.trigger = scs_input_trigger,
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};
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static int scs_create_midi(struct scs *scs)
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{
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struct snd_rawmidi *rmidi;
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int err;
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err = snd_rawmidi_new(scs->card, "SCS.1x", 0, 1, 1, &rmidi);
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if (err < 0)
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return err;
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snprintf(rmidi->name, sizeof(rmidi->name),
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"%s MIDI", scs->card->shortname);
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rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
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SNDRV_RAWMIDI_INFO_INPUT |
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SNDRV_RAWMIDI_INFO_DUPLEX;
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rmidi->private_data = scs;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &output_ops);
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &input_ops);
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return 0;
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}
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static void handle_hss(struct fw_card *card, struct fw_request *request,
|
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int tcode, int destination, int source, int generation,
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unsigned long long offset, void *data, size_t length,
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void *callback_data)
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{
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struct scs *scs = callback_data;
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struct snd_rawmidi_substream *stream;
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if (offset != scs->hss_handler.offset) {
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fw_send_response(card, request, RCODE_ADDRESS_ERROR);
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return;
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}
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if (tcode != TCODE_WRITE_QUADLET_REQUEST &&
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tcode != TCODE_WRITE_BLOCK_REQUEST) {
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fw_send_response(card, request, RCODE_TYPE_ERROR);
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return;
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}
|
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|
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if (length >= 1) {
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stream = ACCESS_ONCE(scs->input);
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if (stream)
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scs_input_packet(scs, stream, data, length);
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}
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fw_send_response(card, request, RCODE_COMPLETE);
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}
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static int scs_init_hss_address(struct scs *scs)
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{
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__be64 data;
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int err;
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data = cpu_to_be64(((u64)HSS1394_TAG_CHANGE_ADDRESS << 56) |
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scs->hss_handler.offset);
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err = snd_fw_transaction(scs->unit, TCODE_WRITE_BLOCK_REQUEST,
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HSS1394_ADDRESS, &data, 8);
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if (err < 0)
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dev_err(&scs->unit->device, "HSS1394 communication failed\n");
|
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|
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return err;
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}
|
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|
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static void scs_card_free(struct snd_card *card)
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{
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struct scs *scs = card->private_data;
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|
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fw_core_remove_address_handler(&scs->hss_handler);
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kfree(scs->buffer);
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}
|
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|
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static int scs_probe(struct device *unit_dev)
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{
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struct fw_unit *unit = fw_unit(unit_dev);
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struct fw_device *fw_dev = fw_parent_device(unit);
|
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struct snd_card *card;
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struct scs *scs;
|
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int err;
|
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|
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err = snd_card_create(-16, NULL, THIS_MODULE, sizeof(*scs), &card);
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if (err < 0)
|
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return err;
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snd_card_set_dev(card, unit_dev);
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|
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scs = card->private_data;
|
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scs->card = card;
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scs->unit = unit;
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tasklet_init(&scs->tasklet, scs_output_tasklet, (unsigned long)scs);
|
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init_waitqueue_head(&scs->idle_wait);
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scs->output_idle = true;
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|
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scs->buffer = kmalloc(HSS1394_MAX_PACKET_SIZE, GFP_KERNEL);
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if (!scs->buffer)
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goto err_card;
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scs->hss_handler.length = HSS1394_MAX_PACKET_SIZE;
|
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scs->hss_handler.address_callback = handle_hss;
|
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scs->hss_handler.callback_data = scs;
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err = fw_core_add_address_handler(&scs->hss_handler,
|
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&fw_high_memory_region);
|
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if (err < 0)
|
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goto err_buffer;
|
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|
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card->private_free = scs_card_free;
|
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|
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strcpy(card->driver, "SCS.1x");
|
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strcpy(card->shortname, "SCS.1x");
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fw_csr_string(unit->directory, CSR_MODEL,
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card->shortname, sizeof(card->shortname));
|
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snprintf(card->longname, sizeof(card->longname),
|
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"Stanton DJ %s (GUID %08x%08x) at %s, S%d",
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card->shortname, fw_dev->config_rom[3], fw_dev->config_rom[4],
|
||||
dev_name(&unit->device), 100 << fw_dev->max_speed);
|
||||
strcpy(card->mixername, card->shortname);
|
||||
|
||||
err = scs_init_hss_address(scs);
|
||||
if (err < 0)
|
||||
goto err_card;
|
||||
|
||||
err = scs_create_midi(scs);
|
||||
if (err < 0)
|
||||
goto err_card;
|
||||
|
||||
err = snd_card_register(card);
|
||||
if (err < 0)
|
||||
goto err_card;
|
||||
|
||||
dev_set_drvdata(unit_dev, scs);
|
||||
|
||||
return 0;
|
||||
|
||||
err_buffer:
|
||||
kfree(scs->buffer);
|
||||
err_card:
|
||||
snd_card_free(card);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int scs_remove(struct device *dev)
|
||||
{
|
||||
struct scs *scs = dev_get_drvdata(dev);
|
||||
|
||||
snd_card_disconnect(scs->card);
|
||||
|
||||
ACCESS_ONCE(scs->output) = NULL;
|
||||
ACCESS_ONCE(scs->input) = NULL;
|
||||
|
||||
wait_event(scs->idle_wait, scs->output_idle);
|
||||
|
||||
tasklet_kill(&scs->tasklet);
|
||||
|
||||
snd_card_free_when_closed(scs->card);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void scs_update(struct fw_unit *unit)
|
||||
{
|
||||
struct scs *scs = dev_get_drvdata(&unit->device);
|
||||
__be64 data;
|
||||
|
||||
data = cpu_to_be64(((u64)HSS1394_TAG_CHANGE_ADDRESS << 56) |
|
||||
scs->hss_handler.offset);
|
||||
snd_fw_transaction(scs->unit, TCODE_WRITE_BLOCK_REQUEST,
|
||||
HSS1394_ADDRESS, &data, 8);
|
||||
}
|
||||
|
||||
static const struct ieee1394_device_id scs_id_table[] = {
|
||||
{
|
||||
.match_flags = IEEE1394_MATCH_VENDOR_ID |
|
||||
IEEE1394_MATCH_MODEL_ID,
|
||||
.vendor_id = OUI_STANTON,
|
||||
.model_id = MODEL_SCS_1M,
|
||||
},
|
||||
{
|
||||
.match_flags = IEEE1394_MATCH_VENDOR_ID |
|
||||
IEEE1394_MATCH_MODEL_ID,
|
||||
.vendor_id = OUI_STANTON,
|
||||
.model_id = MODEL_SCS_1D,
|
||||
},
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(ieee1394, scs_id_table);
|
||||
|
||||
MODULE_DESCRIPTION("SCS.1x MIDI driver");
|
||||
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
static struct fw_driver scs_driver = {
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = KBUILD_MODNAME,
|
||||
.bus = &fw_bus_type,
|
||||
.probe = scs_probe,
|
||||
.remove = scs_remove,
|
||||
},
|
||||
.update = scs_update,
|
||||
.id_table = scs_id_table,
|
||||
};
|
||||
|
||||
static int __init alsa_scs1x_init(void)
|
||||
{
|
||||
return driver_register(&scs_driver.driver);
|
||||
}
|
||||
|
||||
static void __exit alsa_scs1x_exit(void)
|
||||
{
|
||||
driver_unregister(&scs_driver.driver);
|
||||
}
|
||||
|
||||
module_init(alsa_scs1x_init);
|
||||
module_exit(alsa_scs1x_exit);
|
||||
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