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authorJames Courtier-Dutton <James@superbug.co.uk>2005-10-20 22:57:51 +0200
committerJaroslav Kysela <perex@suse.cz>2005-11-04 13:19:26 +0100
commit8a5afd29dc16a9e687f63195cb635ecd611482d0 (patch)
treedff1950bd5302e5b2752e32075166638be1436dd /sound
parentb0b9811956db489ca43596c37ef2f38582454e51 (diff)
[ALSA] snd-ca0106: Add midi support.
Modules: PCI drivers,CA0106 driver Author: Tilman Kranz <tilde@tk-sls.de> Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/Kconfig1
-rw-r--r--sound/pci/ca0106/Makefile2
-rw-r--r--sound/pci/ca0106/ca0106.h27
-rw-r--r--sound/pci/ca0106/ca0106_main.c111
-rw-r--r--sound/pci/ca0106/ca_midi.c304
-rw-r--r--sound/pci/ca0106/ca_midi.h72
6 files changed, 512 insertions, 5 deletions
diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index d140e93d37b..0fb16cf335e 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -184,6 +184,7 @@ config SND_CA0106
tristate "SB Audigy LS / Live 24bit"
depends on SND
select SND_AC97_CODEC
+ select SND_RAWMIDI
help
Say Y here to include support for the Sound Blaster Audigy LS
and Live 24bit.
diff --git a/sound/pci/ca0106/Makefile b/sound/pci/ca0106/Makefile
index 89c6ceee21f..dcbae7b3154 100644
--- a/sound/pci/ca0106/Makefile
+++ b/sound/pci/ca0106/Makefile
@@ -1,3 +1,3 @@
-snd-ca0106-objs := ca0106_main.o ca0106_proc.o ca0106_mixer.o
+snd-ca0106-objs := ca0106_main.o ca0106_proc.o ca0106_mixer.o ca_midi.o
obj-$(CONFIG_SND_CA0106) += snd-ca0106.o
diff --git a/sound/pci/ca0106/ca0106.h b/sound/pci/ca0106/ca0106.h
index da09cab405a..9a4b6406f7a 100644
--- a/sound/pci/ca0106/ca0106.h
+++ b/sound/pci/ca0106/ca0106.h
@@ -399,10 +399,24 @@
#define PLAYBACK_VOLUME2 0x6a /* Playback Analog volume per channel. Does not effect AC3 output */
/* Similar to register 0x66, except that the destination is the I2S mixer instead of the SPDIF mixer. I.E. Outputs to the Analog outputs instead of SPDIF. */
#define UNKNOWN6b 0x6b /* Unknown. Readonly. Default 00400000 00400000 00400000 00400000 */
-#define UART_A_DATA 0x6c /* Uart, used in setting sample rates, bits per sample etc. */
-#define UART_A_CMD 0x6d /* Uart, used in setting sample rates, bits per sample etc. */
-#define UART_B_DATA 0x6e /* Uart, Unknown. */
-#define UART_B_CMD 0x6f /* Uart, Unknown. */
+#define MIDI_UART_A_DATA 0x6c /* Midi Uart A Data */
+#define MIDI_UART_A_CMD 0x6d /* Midi Uart A Command/Status */
+#define MIDI_UART_B_DATA 0x6e /* Midi Uart B Data (currently unused) */
+#define MIDI_UART_B_CMD 0x6f /* Midi Uart B Command/Status (currently unused) */
+
+/* unique channel identifier for midi->channel */
+
+#define CA0106_MIDI_CHAN_A 0x1
+#define CA0106_MIDI_CHAN_B 0x2
+
+/* from mpu401 */
+
+#define CA0106_MIDI_INPUT_AVAIL 0x80
+#define CA0106_MIDI_OUTPUT_READY 0x40
+#define CA0106_MPU401_RESET 0xff
+#define CA0106_MPU401_ENTER_UART 0x3f
+#define CA0106_MPU401_ACK 0xfe
+
#define SAMPLE_RATE_TRACKER_STATUS 0x70 /* Readonly. Default 00108000 00108000 00500000 00500000 */
/* Estimated sample rate [19:0] Relative to 48kHz. 0x8000 = 1.0
* Rate Locked [20]
@@ -538,6 +552,8 @@
#define CONTROL_CENTER_LFE_CHANNEL 1
#define CONTROL_UNKNOWN_CHANNEL 2
+#include "ca_midi.h"
+
typedef struct snd_ca0106_channel ca0106_channel_t;
typedef struct snd_ca0106 ca0106_t;
typedef struct snd_ca0106_pcm ca0106_pcm_t;
@@ -592,6 +608,9 @@ struct snd_ca0106 {
int capture_mic_line_in;
struct snd_dma_buffer buffer;
+
+ ca_midi_t midi;
+ ca_midi_t midi2;
};
int __devinit snd_ca0106_mixer(ca0106_t *emu);
diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index f6920ef5b4e..aaaef9e66af 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -338,6 +338,18 @@ static void snd_ca0106_intr_enable(ca0106_t *emu, unsigned int intrenb)
spin_unlock_irqrestore(&emu->emu_lock, flags);
}
+static void snd_ca0106_intr_disable(ca0106_t *emu, unsigned int intrenb)
+{
+ unsigned long flags;
+ unsigned int enable;
+
+ spin_lock_irqsave(&emu->emu_lock, flags);
+ enable = inl(emu->port + INTE) & ~intrenb;
+ outl(enable, emu->port + INTE);
+ spin_unlock_irqrestore(&emu->emu_lock, flags);
+}
+
+
static void snd_ca0106_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
kfree(runtime->private_data);
@@ -1040,6 +1052,15 @@ static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id,
snd_ca0106_ptr_write(chip, EXTENDED_INT, 0, stat76);
spin_lock(&chip->emu_lock);
+
+ if (chip->midi.dev_id &&
+ (status & (chip->midi.ipr_tx|chip->midi.ipr_rx))) {
+ if (chip->midi.interrupt)
+ chip->midi.interrupt(&chip->midi, status);
+ else
+ chip->midi.interrupt_disable(&chip->midi, chip->midi.tx_enable | chip->midi.rx_enable);
+ }
+
// acknowledge the interrupt if necessary
outl(status, chip->port+IPR);
@@ -1309,6 +1330,82 @@ static int __devinit snd_ca0106_create(snd_card_t *card,
return 0;
}
+
+void ca0106_midi_interrupt_enable(ca_midi_t *midi, int intr){
+ snd_ca0106_intr_enable((ca0106_t *)(midi->dev_id), intr);
+}
+
+void ca0106_midi_interrupt_disable(ca_midi_t *midi, int intr){
+ snd_ca0106_intr_disable((ca0106_t *)(midi->dev_id), intr);
+}
+
+unsigned char ca0106_midi_read(ca_midi_t *midi, int idx){
+ return (unsigned char)snd_ca0106_ptr_read((ca0106_t *)(midi->dev_id), midi->port + idx, 0);
+}
+
+void ca0106_midi_write(ca_midi_t *midi, int data, int idx){
+ snd_ca0106_ptr_write((ca0106_t *)(midi->dev_id), midi->port + idx, 0, data);
+}
+
+snd_card_t *ca0106_dev_id_card(void *dev_id){
+ return ((ca0106_t *)dev_id)->card;
+}
+
+int ca0106_dev_id_port(void *dev_id){
+ return ((ca0106_t *)dev_id)->port;
+}
+
+static int __devinit snd_ca0106_midi(ca0106_t *chip, unsigned int channel)
+{
+ ca_midi_t *midi;
+ char *name;
+ int err;
+
+ if(channel==CA0106_MIDI_CHAN_B) {
+ name = "CA0106 MPU-401 (UART) B";
+ midi = &chip->midi2;
+ midi->tx_enable = INTE_MIDI_TX_B;
+ midi->rx_enable = INTE_MIDI_RX_B;
+ midi->ipr_tx = IPR_MIDI_TX_B;
+ midi->ipr_rx = IPR_MIDI_RX_B;
+ midi->port = MIDI_UART_B_DATA;
+ } else {
+ name = "CA0106 MPU-401 (UART)";
+ midi = &chip->midi;
+ midi->tx_enable = INTE_MIDI_TX_A;
+ midi->rx_enable = INTE_MIDI_TX_B;
+ midi->ipr_tx = IPR_MIDI_TX_A;
+ midi->ipr_rx = IPR_MIDI_RX_A;
+ midi->port = MIDI_UART_A_DATA;
+ }
+
+ midi->reset = CA0106_MPU401_RESET;
+ midi->enter_uart = CA0106_MPU401_ENTER_UART;
+ midi->ack = CA0106_MPU401_ACK;
+
+ midi->input_avail = CA0106_MIDI_INPUT_AVAIL;
+ midi->output_ready = CA0106_MIDI_OUTPUT_READY;
+
+ midi->channel = channel;
+
+ midi->interrupt_enable = ca0106_midi_interrupt_enable;
+ midi->interrupt_disable = ca0106_midi_interrupt_disable;
+
+ midi->read = ca0106_midi_read;
+ midi->write = ca0106_midi_write;
+
+ midi->get_dev_id_card = ca0106_dev_id_card;
+ midi->get_dev_id_port = ca0106_dev_id_port;
+
+ midi->dev_id = chip;
+
+ if ((err = ca_midi_init(chip, midi, 0, name)) < 0)
+ return err;
+
+ return 0;
+}
+
+
static int __devinit snd_ca0106_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
@@ -1360,6 +1457,20 @@ static int __devinit snd_ca0106_probe(struct pci_dev *pci,
return err;
}
+#ifdef CONFIG_SND_DEBUG_DETECT
+ printk("ca0106: probe for MIDI channel A ...");
+#endif
+ if ((err = snd_ca0106_midi(chip,CA0106_MIDI_CHAN_A)) < 0) {
+ snd_card_free(card);
+#ifdef CONFIG_SND_DEBUG_DETECT
+ printk(" failed, err=0x%x\n",err);
+#endif
+ return err;
+ }
+#ifdef CONFIG_SND_DEBUG_DETECT
+ printk(" done.\n");
+#endif
+
snd_ca0106_proc_init(chip);
if ((err = snd_card_register(card)) < 0) {
diff --git a/sound/pci/ca0106/ca_midi.c b/sound/pci/ca0106/ca_midi.c
new file mode 100644
index 00000000000..f439d14876b
--- /dev/null
+++ b/sound/pci/ca0106/ca_midi.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
+ * Creative Audio MIDI, for the CA0106 Driver
+ * Version: 0.0.1
+ *
+ * Changelog:
+ * Implementation is based on mpu401 and emu10k1x and
+ * tested with ca0106.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/rawmidi.h>
+
+#include "ca_midi.h"
+
+#define ca_midi_write_data(midi, data) midi->write(midi, data, 0)
+#define ca_midi_write_cmd(midi, data) midi->write(midi, data, 1)
+#define ca_midi_read_data(midi) midi->read(midi, 0)
+#define ca_midi_read_stat(midi) midi->read(midi, 1)
+#define ca_midi_input_avail(midi) (!(ca_midi_read_stat(midi) & midi->input_avail))
+#define ca_midi_output_ready(midi) (!(ca_midi_read_stat(midi) & midi->output_ready))
+
+static void ca_midi_clear_rx(ca_midi_t *midi)
+{
+ int timeout = 100000;
+ for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
+ ca_midi_read_data(midi);
+#ifdef CONFIG_SND_DEBUG
+ if (timeout <= 0)
+ snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n", ca_midi_read_stat(midi));
+#endif
+}
+
+void ca_midi_interrupt(ca_midi_t *midi, unsigned int status) {
+ unsigned char byte;
+
+ if (midi->rmidi == NULL) {
+ midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
+ return;
+ }
+
+ spin_lock(&midi->input_lock);
+ if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
+ if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
+ ca_midi_clear_rx(midi);
+ } else {
+ byte = ca_midi_read_data(midi);
+ if(midi->substream_input)
+ snd_rawmidi_receive(midi->substream_input, &byte, 1);
+
+
+ }
+ }
+ spin_unlock(&midi->input_lock);
+
+ spin_lock(&midi->output_lock);
+ if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
+ if (midi->substream_output &&
+ snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
+ ca_midi_write_data(midi, byte);
+ } else {
+ midi->interrupt_disable(midi,midi->tx_enable);
+ }
+ }
+ spin_unlock(&midi->output_lock);
+
+}
+
+static void ca_midi_cmd(ca_midi_t *midi, unsigned char cmd, int ack)
+{
+ unsigned long flags;
+ int timeout, ok;
+
+ spin_lock_irqsave(&midi->input_lock, flags);
+ ca_midi_write_data(midi, 0x00);
+ /* ca_midi_clear_rx(midi); */
+
+ ca_midi_write_cmd(midi, cmd);
+ if (ack) {
+ ok = 0;
+ timeout = 10000;
+ while (!ok && timeout-- > 0) {
+ if (ca_midi_input_avail(midi)) {
+ if (ca_midi_read_data(midi) == midi->ack)
+ ok = 1;
+ }
+ }
+ if (!ok && ca_midi_read_data(midi) == midi->ack)
+ ok = 1;
+ } else {
+ ok = 1;
+ }
+ spin_unlock_irqrestore(&midi->input_lock, flags);
+ if (!ok)
+ snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
+ cmd,
+ midi->get_dev_id_port(midi->dev_id),
+ ca_midi_read_stat(midi),
+ ca_midi_read_data(midi));
+}
+
+static int ca_midi_input_open(snd_rawmidi_substream_t * substream)
+{
+ ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ snd_assert(midi->dev_id, return -ENXIO);
+ spin_lock_irqsave(&midi->open_lock, flags);
+ midi->midi_mode |= CA_MIDI_MODE_INPUT;
+ midi->substream_input = substream;
+ if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ ca_midi_cmd(midi, midi->reset, 1);
+ ca_midi_cmd(midi, midi->enter_uart, 1);
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return 0;
+}
+
+static int ca_midi_output_open(snd_rawmidi_substream_t * substream)
+{
+ ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ snd_assert(midi->dev_id, return -ENXIO);
+ spin_lock_irqsave(&midi->open_lock, flags);
+ midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
+ midi->substream_output = substream;
+ if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ ca_midi_cmd(midi, midi->reset, 1);
+ ca_midi_cmd(midi, midi->enter_uart, 1);
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return 0;
+}
+
+static int ca_midi_input_close(snd_rawmidi_substream_t * substream)
+{
+ ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ snd_assert(midi->dev_id, return -ENXIO);
+ spin_lock_irqsave(&midi->open_lock, flags);
+ midi->interrupt_disable(midi,midi->rx_enable);
+ midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
+ midi->substream_input = NULL;
+ if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ ca_midi_cmd(midi, midi->reset, 0);
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return 0;
+}
+
+static int ca_midi_output_close(snd_rawmidi_substream_t * substream)
+{
+ ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
+ unsigned long flags;
+ snd_assert(midi->dev_id, return -ENXIO);
+
+ spin_lock_irqsave(&midi->open_lock, flags);
+
+ midi->interrupt_disable(midi,midi->tx_enable);
+ midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
+ midi->substream_output = NULL;
+
+ if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ ca_midi_cmd(midi, midi->reset, 0);
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return 0;
+}
+
+static void ca_midi_input_trigger(snd_rawmidi_substream_t * substream, int up)
+{
+ ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
+ snd_assert(midi->dev_id, return);
+
+ if (up) {
+ midi->interrupt_enable(midi,midi->rx_enable);
+ } else {
+ midi->interrupt_disable(midi, midi->rx_enable);
+ }
+}
+
+static void ca_midi_output_trigger(snd_rawmidi_substream_t * substream, int up)
+{
+ ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ snd_assert(midi->dev_id, return);
+
+ if (up) {
+ int max = 4;
+ unsigned char byte;
+
+ spin_lock_irqsave(&midi->output_lock, flags);
+
+ /* try to send some amount of bytes here before interrupts */
+ while (max > 0) {
+ if (ca_midi_output_ready(midi)) {
+ if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
+ snd_rawmidi_transmit(substream, &byte, 1) != 1) {
+ /* no more data */
+ spin_unlock_irqrestore(&midi->output_lock, flags);
+ return;
+ }
+ ca_midi_write_data(midi, byte);
+ max--;
+ } else {
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&midi->output_lock, flags);
+ midi->interrupt_enable(midi,midi->tx_enable);
+
+ } else {
+ midi->interrupt_disable(midi,midi->tx_enable);
+ }
+}
+
+static snd_rawmidi_ops_t ca_midi_output =
+{
+ .open = ca_midi_output_open,
+ .close = ca_midi_output_close,
+ .trigger = ca_midi_output_trigger,
+};
+
+static snd_rawmidi_ops_t ca_midi_input =
+{
+ .open = ca_midi_input_open,
+ .close = ca_midi_input_close,
+ .trigger = ca_midi_input_trigger,
+};
+
+void ca_midi_free(ca_midi_t *midi) {
+ midi->interrupt = NULL;
+ midi->interrupt_enable = NULL;
+ midi->interrupt_disable = NULL;
+ midi->read = NULL;
+ midi->write = NULL;
+ midi->get_dev_id_card = NULL;
+ midi->get_dev_id_port = NULL;
+ midi->rmidi = NULL;
+}
+
+static void ca_rmidi_free(snd_rawmidi_t *rmidi)
+{
+ ca_midi_free((ca_midi_t *)rmidi->private_data);
+}
+
+int __devinit ca_midi_init(void *dev_id, ca_midi_t *midi, int device, char *name)
+{
+ snd_rawmidi_t *rmidi;
+ int err;
+
+ if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
+ return err;
+
+ midi->dev_id = dev_id;
+ midi->interrupt = ca_midi_interrupt;
+
+ spin_lock_init(&midi->open_lock);
+ spin_lock_init(&midi->input_lock);
+ spin_lock_init(&midi->output_lock);
+
+ strcpy(rmidi->name, name);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+ rmidi->private_data = midi;
+ rmidi->private_free = ca_rmidi_free;
+
+ midi->rmidi = rmidi;
+ return 0;
+}
+
diff --git a/sound/pci/ca0106/ca_midi.h b/sound/pci/ca0106/ca_midi.h
new file mode 100644
index 00000000000..95c8e1c170b
--- /dev/null
+++ b/sound/pci/ca0106/ca_midi.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
+ * Creative Audio MIDI, for the CA0106 Driver
+ * Version: 0.0.1
+ *
+ * Changelog:
+ * See ca_midi.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include<linux/spinlock.h>
+#include<sound/rawmidi.h>
+#include<sound/mpu401.h>
+
+#define CA_MIDI_MODE_INPUT MPU401_MODE_INPUT
+#define CA_MIDI_MODE_OUTPUT MPU401_MODE_OUTPUT
+
+typedef struct ca_midi ca_midi_t;
+struct ca_midi {
+
+ snd_rawmidi_t *rmidi;
+ snd_rawmidi_substream_t *substream_input;
+ snd_rawmidi_substream_t *substream_output;
+
+ void *dev_id;
+
+ spinlock_t input_lock;
+ spinlock_t output_lock;
+ spinlock_t open_lock;
+
+ unsigned int channel;
+
+ unsigned int midi_mode;
+ int port;
+ int tx_enable, rx_enable;
+ int ipr_tx, ipr_rx;
+
+ int input_avail, output_ready;
+ int ack, reset, enter_uart;
+
+ void (*interrupt)(ca_midi_t *midi, unsigned int status);
+ void (*interrupt_enable)(ca_midi_t *midi, int intr);
+ void (*interrupt_disable)(ca_midi_t *midi, int intr);
+
+ unsigned char (*read)(ca_midi_t *midi, int idx);
+ void (*write)(ca_midi_t *midi, int data, int idx);
+
+ /* get info from dev_id */
+ snd_card_t *(*get_dev_id_card)(void *dev_id);
+ int (*get_dev_id_port)(void *dev_id);
+};
+
+void ca_midi_interrupt(ca_midi_t *midi, unsigned int status);
+
+int __devinit ca_midi_init(void *card, ca_midi_t *midi, int device, char *name);
+
+void ca_midi_free(ca_midi_t *midi);
+