[ALSA] Add snd-mts64 driver for ESI Miditerminal 4140

Added snd-mts64 driver for Ego Systems (ESI) Miditerminal 4140
by Matthias Koenig <mk@phasorlab.de>.
The driver requires parport (CONFIG_PARPORT).

Signed-off-by: Matthias Koenig <mk@phasorlab.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 1091 insertions, 0 deletions

diff --git a/sound/drivers/mts64.c b/sound/drivers/mts64.c
new file mode 100644
index 000000000000..169987302ae4
--- /dev/null
+++ b/sound/drivers/mts64.c
@@ -0,0 +1,1091 @@
+/*     
+ *   ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
+ *   Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
+ *
+ *   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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/parport.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/rawmidi.h>
+#include <sound/control.h>
+
+#define CARD_NAME "Miditerminal 4140"
+#define DRIVER_NAME "MTS64"
+#define PLATFORM_DRIVER "snd_mts64"
+
+static int index[SNDRV_CARDS]  = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS]   = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+static struct platform_device *platform_devices[SNDRV_CARDS]; 
+static int device_count;
+
+module_param_array(index, int, NULL, S_IRUGO);
+MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
+module_param_array(id, charp, NULL, S_IRUGO);
+MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
+module_param_array(enable, bool, NULL, S_IRUGO);
+MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
+
+MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
+MODULE_DESCRIPTION("ESI Miditerminal 4140");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{ESI,Miditerminal 4140}}");
+
+/*********************************************************************
+ * Chip specific
+ *********************************************************************/
+#define MTS64_NUM_INPUT_PORTS 5
+#define MTS64_NUM_OUTPUT_PORTS 4
+#define MTS64_SMPTE_SUBSTREAM 4
+
+struct mts64 {
+        spinlock_t lock;
+        struct snd_card *card;
+        struct snd_rawmidi *rmidi;
+        struct pardevice *pardev;
+        int pardev_claimed;
+
+        int open_count;
+        int current_midi_output_port;
+        int current_midi_input_port;
+        u8 mode[MTS64_NUM_INPUT_PORTS];
+        struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
+        int smpte_switch;
+        u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
+        u8 fps;
+};
+
+static int snd_mts64_free(struct mts64 *mts)
+{
+        kfree(mts);
+        return 0;
+}
+
+static int __devinit snd_mts64_create(struct snd_card *card, 
+                                      struct pardevice *pardev, 
+                                      struct mts64 **rchip)
+{
+        struct mts64 *mts;
+
+        *rchip = NULL;
+
+        mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
+        if (mts == NULL) 
+                return -ENOMEM;
+
+        /* Init chip specific data */
+        spin_lock_init(&mts->lock);
+        mts->card = card;
+        mts->pardev = pardev;
+        mts->current_midi_output_port = -1;
+        mts->current_midi_input_port = -1;
+
+        *rchip = mts;
+
+        return 0;
+}
+
+/*********************************************************************
+ * HW register related constants
+ *********************************************************************/
+
+/* Status Bits */
+#define MTS64_STAT_BSY             0x80
+#define MTS64_STAT_BIT_SET         0x20  /* readout process, bit is set */
+#define MTS64_STAT_PORT            0x10  /* read byte is a port number */
+
+/* Control Bits */
+#define MTS64_CTL_READOUT          0x08  /* enable readout */
+#define MTS64_CTL_WRITE_CMD        0x06  
+#define MTS64_CTL_WRITE_DATA       0x02  
+#define MTS64_CTL_STROBE           0x01  
+
+/* Command */
+#define MTS64_CMD_RESET            0xfe
+#define MTS64_CMD_PROBE            0x8f  /* Used in probing procedure */
+#define MTS64_CMD_SMPTE_SET_TIME   0xe8
+#define MTS64_CMD_SMPTE_SET_FPS    0xee
+#define MTS64_CMD_SMPTE_STOP       0xef
+#define MTS64_CMD_SMPTE_FPS_24     0xe3
+#define MTS64_CMD_SMPTE_FPS_25     0xe2
+#define MTS64_CMD_SMPTE_FPS_2997   0xe4 
+#define MTS64_CMD_SMPTE_FPS_30D    0xe1
+#define MTS64_CMD_SMPTE_FPS_30     0xe0
+#define MTS64_CMD_COM_OPEN         0xf8  /* setting the communication mode */
+#define MTS64_CMD_COM_CLOSE1       0xff  /* clearing communication mode */
+#define MTS64_CMD_COM_CLOSE2       0xf5
+
+/*********************************************************************
+ * Hardware specific functions
+ *********************************************************************/
+static void mts64_enable_readout(struct parport *p);
+static void mts64_disable_readout(struct parport *p);
+static int mts64_device_ready(struct parport *p);
+static int mts64_device_init(struct parport *p);
+static int mts64_device_open(struct mts64 *mts);
+static int mts64_device_close(struct mts64 *mts);
+static u8 mts64_map_midi_input(u8 c);
+static int mts64_probe(struct parport *p);
+static u16 mts64_read(struct parport *p);
+static u8 mts64_read_char(struct parport *p);
+static void mts64_smpte_start(struct parport *p,
+                              u8 hours, u8 minutes,
+                              u8 seconds, u8 frames,
+                              u8 idx);
+static void mts64_smpte_stop(struct parport *p);
+static void mts64_write_command(struct parport *p, u8 c);
+static void mts64_write_data(struct parport *p, u8 c);
+static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
+
+
+/*  Enables the readout procedure
+ *
+ *  Before we can read a midi byte from the device, we have to set
+ *  bit 3 of control port.
+ */
+static void mts64_enable_readout(struct parport *p)
+{
+        u8 c;
+
+        c = parport_read_control(p);
+        c |= MTS64_CTL_READOUT;
+        parport_write_control(p, c); 
+}
+
+/*  Disables readout 
+ *
+ *  Readout is disabled by clearing bit 3 of control
+ */
+static void mts64_disable_readout(struct parport *p)
+{
+        u8 c;
+
+        c = parport_read_control(p);
+        c &= ~MTS64_CTL_READOUT;
+        parport_write_control(p, c);
+}
+
+/*  waits for device ready
+ *
+ *  Checks if BUSY (Bit 7 of status) is clear
+ *  1 device ready
+ *  0 failure
+ */
+static int mts64_device_ready(struct parport *p)
+{
+        int i;
+        u8 c;
+
+        for (i = 0; i < 0xffff; ++i) {
+                c = parport_read_status(p);
+                c &= MTS64_STAT_BSY;
+                if (c != 0) 
+                        return 1;
+        } 
+
+        return 0;
+}
+
+/*  Init device (LED blinking startup magic)
+ *
+ *  Returns:
+ *  0 init ok
+ *  -EIO failure
+ */
+static int __devinit mts64_device_init(struct parport *p)
+{
+        int i;
+
+        mts64_write_command(p, MTS64_CMD_RESET);
+
+        for (i = 0; i < 64; ++i) {
+                msleep(100);
+
+                if (mts64_probe(p) == 0) {
+                        /* success */
+                        mts64_disable_readout(p);
+                        return 0;
+                }
+        }
+        mts64_disable_readout(p);
+
+        return -EIO;
+}
+
+/* 
+ *  Opens the device (set communication mode)
+ */
+static int mts64_device_open(struct mts64 *mts)
+{
+        int i;
+        struct parport *p = mts->pardev->port;
+
+        for (i = 0; i < 5; ++i)
+                mts64_write_command(p, MTS64_CMD_COM_OPEN);
+
+        return 0;
+}
+
+/*  
+ *  Close device (clear communication mode)
+ */
+static int mts64_device_close(struct mts64 *mts)
+{
+        int i;
+        struct parport *p = mts->pardev->port;
+
+        for (i = 0; i < 5; ++i) {
+                mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
+                mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
+        }
+
+        return 0;
+}
+
+/*  map hardware port to substream number
+ * 
+ *  When reading a byte from the device, the device tells us
+ *  on what port the byte is. This HW port has to be mapped to
+ *  the midiport (substream number).
+ *  substream 0-3 are Midiports 1-4
+ *  substream 4 is SMPTE Timecode
+ *  The mapping is done by the table:
+ *  HW | 0 | 1 | 2 | 3 | 4 
+ *  SW | 0 | 1 | 4 | 2 | 3
+ */
+static u8 mts64_map_midi_input(u8 c)
+{
+        static u8 map[] = { 0, 1, 4, 2, 3 };
+
+        return map[c];
+}
+
+
+/*  Probe parport for device
+ *
+ *  Do we have a Miditerminal 4140 on parport? 
+ *  Returns:
+ *  0       device found
+ *  -ENODEV no device
+ */
+static int __devinit mts64_probe(struct parport *p)
+{
+        u8 c;
+
+        mts64_smpte_stop(p);
+        mts64_write_command(p, MTS64_CMD_PROBE);
+
+        msleep(50);
+        
+        c = mts64_read(p);
+
+        c &= 0x00ff;
+        if (c != MTS64_CMD_PROBE) 
+                return -ENODEV;
+        else 
+                return 0;
+
+}
+
+/*  Read byte incl. status from device
+ *
+ *  Returns:
+ *  data in lower 8 bits and status in upper 8 bits
+ */
+static u16 mts64_read(struct parport *p)
+{
+        u8 data, status;
+
+        mts64_device_ready(p);
+        mts64_enable_readout(p);
+        status = parport_read_status(p);
+        data = mts64_read_char(p);
+        mts64_disable_readout(p);
+
+        return (status << 8) | data;
+}
+
+/*  Read a byte from device
+ *
+ *  Note, that readout mode has to be enabled.
+ *  readout procedure is as follows: 
+ *  - Write number of the Bit to read to DATA
+ *  - Read STATUS
+ *  - Bit 5 of STATUS indicates if Bit is set
+ *
+ *  Returns:
+ *  Byte read from device
+ */
+static u8 mts64_read_char(struct parport *p)
+{
+        u8 c = 0;
+        u8 status;
+        u8 i;
+
+        for (i = 0; i < 8; ++i) {
+                parport_write_data(p, i);
+                c >>= 1;
+                status = parport_read_status(p);
+                if (status & MTS64_STAT_BIT_SET) 
+                        c |= 0x80;
+        }
+        
+        return c;
+}
+
+/*  Starts SMPTE Timecode generation
+ *
+ *  The device creates SMPTE Timecode by hardware.
+ *  0 24 fps
+ *  1 25 fps
+ *  2 29.97 fps
+ *  3 30 fps (Drop-frame)
+ *  4 30 fps
+ */
+static void mts64_smpte_start(struct parport *p,
+                              u8 hours, u8 minutes,
+                              u8 seconds, u8 frames,
+                              u8 idx)
+{
+        static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24, 
+                             MTS64_CMD_SMPTE_FPS_25,
+                             MTS64_CMD_SMPTE_FPS_2997, 
+                             MTS64_CMD_SMPTE_FPS_30D,
+                             MTS64_CMD_SMPTE_FPS_30    };
+
+        mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
+        mts64_write_command(p, frames);
+        mts64_write_command(p, seconds);
+        mts64_write_command(p, minutes);
+        mts64_write_command(p, hours);
+
+        mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
+        mts64_write_command(p, fps[idx]);
+}
+
+/*  Stops SMPTE Timecode generation
+ */
+static void mts64_smpte_stop(struct parport *p)
+{
+        mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
+}
+
+/*  Write a command byte to device
+ */
+static void mts64_write_command(struct parport *p, u8 c)
+{
+        mts64_device_ready(p);
+
+        parport_write_data(p, c);
+
+        parport_write_control(p, MTS64_CTL_WRITE_CMD);
+        parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
+        parport_write_control(p, MTS64_CTL_WRITE_CMD);
+}
+
+/*  Write a data byte to device 
+ */
+static void mts64_write_data(struct parport *p, u8 c)
+{
+        mts64_device_ready(p);
+
+        parport_write_data(p, c);
+
+        parport_write_control(p, MTS64_CTL_WRITE_DATA);
+        parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
+        parport_write_control(p, MTS64_CTL_WRITE_DATA);
+}
+
+/*  Write a MIDI byte to midiport
+ *
+ *  midiport ranges from 0-3 and maps to Ports 1-4
+ *  assumptions: communication mode is on
+ */
+static void mts64_write_midi(struct mts64 *mts, u8 c,
+                             int midiport)
+{
+        struct parport *p = mts->pardev->port;
+
+        /* check current midiport */
+        if (mts->current_midi_output_port != midiport)
+                mts64_write_command(p, midiport);
+
+        /* write midi byte */
+        mts64_write_data(p, c);
+}
+
+/*********************************************************************
+ * Control elements
+ *********************************************************************/
+
+/* SMPTE Switch */
+static int snd_mts64_ctl_smpte_switch_info(struct snd_kcontrol *kctl,
+                                           struct snd_ctl_elem_info *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 1;
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
+                                          struct snd_ctl_elem_value *uctl)
+{
+        struct mts64 *mts = snd_kcontrol_chip(kctl);
+
+        spin_lock_irq(&mts->lock);
+        uctl->value.integer.value[0] = mts->smpte_switch;
+        spin_unlock_irq(&mts->lock);
+
+        return 0;
+}
+
+/* smpte_switch is not accessed from IRQ handler, so we just need
+   to protect the HW access */
+static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
+                                          struct snd_ctl_elem_value *uctl)
+{
+        struct mts64 *mts = snd_kcontrol_chip(kctl);
+        int changed = 0;
+
+        spin_lock_irq(&mts->lock);
+        if (mts->smpte_switch == uctl->value.integer.value[0])
+                goto __out;
+
+        changed = 1;
+        mts->smpte_switch = uctl->value.integer.value[0];
+        if (mts->smpte_switch) {
+                mts64_smpte_start(mts->pardev->port,
+                                  mts->time[0], mts->time[1],
+                                  mts->time[2], mts->time[3],
+                                  mts->fps);
+        } else {
+                mts64_smpte_stop(mts->pardev->port);
+        }
+__out:
+        spin_unlock_irq(&mts->lock);
+        return changed;
+}
+
+static struct snd_kcontrol_new mts64_ctl_smpte_switch __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
+        .name  = "SMPTE Playback Switch",
+        .index = 0,
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+        .private_value = 0,
+        .info = snd_mts64_ctl_smpte_switch_info,
+        .get  = snd_mts64_ctl_smpte_switch_get,
+        .put  = snd_mts64_ctl_smpte_switch_put
+};
+
+/* Time */
+static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
+                                           struct snd_ctl_elem_info *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 23;
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
+                                           struct snd_ctl_elem_info *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 99;
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
+                                         struct snd_ctl_elem_info *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 59;
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
+                                        struct snd_ctl_elem_value *uctl)
+{
+        struct mts64 *mts = snd_kcontrol_chip(kctl);
+        int idx = kctl->private_value;
+
+        spin_lock_irq(&mts->lock);
+        uctl->value.integer.value[0] = mts->time[idx];
+        spin_unlock_irq(&mts->lock);
+
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
+                                        struct snd_ctl_elem_value *uctl)
+{
+        struct mts64 *mts = snd_kcontrol_chip(kctl);
+        int idx = kctl->private_value;
+        int changed = 0;
+
+        spin_lock_irq(&mts->lock);
+        if (mts->time[idx] != uctl->value.integer.value[0]) {
+                changed = 1;
+                mts->time[idx] = uctl->value.integer.value[0];
+        }
+        spin_unlock_irq(&mts->lock);
+
+        return changed;
+}
+
+static struct snd_kcontrol_new mts64_ctl_smpte_time_hours __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
+        .name  = "SMPTE Time Hours",
+        .index = 0,
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+        .private_value = 0,
+        .info = snd_mts64_ctl_smpte_time_h_info,
+        .get  = snd_mts64_ctl_smpte_time_get,
+        .put  = snd_mts64_ctl_smpte_time_put
+};
+
+static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
+        .name  = "SMPTE Time Minutes",
+        .index = 0,
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+        .private_value = 1,
+        .info = snd_mts64_ctl_smpte_time_info,
+        .get  = snd_mts64_ctl_smpte_time_get,
+        .put  = snd_mts64_ctl_smpte_time_put
+};
+
+static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
+        .name  = "SMPTE Time Seconds",
+        .index = 0,
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+        .private_value = 2,
+        .info = snd_mts64_ctl_smpte_time_info,
+        .get  = snd_mts64_ctl_smpte_time_get,
+        .put  = snd_mts64_ctl_smpte_time_put
+};
+
+static struct snd_kcontrol_new mts64_ctl_smpte_time_frames __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
+        .name  = "SMPTE Time Frames",
+        .index = 0,
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+        .private_value = 3,
+        .info = snd_mts64_ctl_smpte_time_f_info,
+        .get  = snd_mts64_ctl_smpte_time_get,
+        .put  = snd_mts64_ctl_smpte_time_put
+};
+
+/* FPS */
+static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
+                                        struct snd_ctl_elem_info *uinfo)
+{
+        static char *texts[5] = { "24",
+                                  "25",
+                                  "29.97",
+                                  "30D",
+                                  "30"    };
+
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+        uinfo->count = 1;
+        uinfo->value.enumerated.items = 5;
+        if (uinfo->value.enumerated.item > 4)
+                uinfo->value.enumerated.item = 4;
+        strcpy(uinfo->value.enumerated.name,
+               texts[uinfo->value.enumerated.item]);
+        
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
+                                       struct snd_ctl_elem_value *uctl)
+{
+        struct mts64 *mts = snd_kcontrol_chip(kctl);
+
+        spin_lock_irq(&mts->lock);
+        uctl->value.enumerated.item[0] = mts->fps;
+        spin_unlock_irq(&mts->lock);
+
+        return 0;
+}
+
+static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
+                                       struct snd_ctl_elem_value *uctl)
+{
+        struct mts64 *mts = snd_kcontrol_chip(kctl);
+        int changed = 0;
+
+        spin_lock_irq(&mts->lock);
+        if (mts->fps != uctl->value.enumerated.item[0]) {
+                changed = 1;
+                mts->fps = uctl->value.enumerated.item[0];
+        }
+        spin_unlock_irq(&mts->lock);
+
+        return changed;
+}
+
+static struct snd_kcontrol_new mts64_ctl_smpte_fps __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
+        .name  = "SMPTE Fps",
+        .index = 0,
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+        .private_value = 0,
+        .info  = snd_mts64_ctl_smpte_fps_info,
+        .get   = snd_mts64_ctl_smpte_fps_get,
+        .put   = snd_mts64_ctl_smpte_fps_put
+};
+
+
+static int __devinit snd_mts64_ctl_create(struct snd_card *card, 
+                                          struct mts64 *mts) 
+{
+        int err, i;
+        static struct snd_kcontrol_new *control[] = {
+                &mts64_ctl_smpte_switch,
+                &mts64_ctl_smpte_time_hours,
+                &mts64_ctl_smpte_time_minutes,
+                &mts64_ctl_smpte_time_seconds,
+                &mts64_ctl_smpte_time_frames,
+                &mts64_ctl_smpte_fps,
+                0  };
+
+        for (i = 0; control[i]; ++i) {
+                err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
+                if (err < 0) {
+                        snd_printd("Cannot create control: %s\n", 
+                                   control[i]->name);
+                        return err;
+                }
+        }
+
+        return 0;
+}
+
+/*********************************************************************
+ * Rawmidi
+ *********************************************************************/
+#define MTS64_MODE_INPUT_TRIGGERED 0x01
+
+static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
+{
+        struct mts64 *mts = substream->rmidi->private_data;
+
+        if (mts->open_count == 0) {
+                /* We don't need a spinlock here, because this is just called 
+                   if the device has not been opened before. 
+                   So there aren't any IRQs from the device */
+                mts64_device_open(mts);
+
+                msleep(50);
+        }
+        ++(mts->open_count);
+
+        return 0;
+}
+
+static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
+{
+        struct mts64 *mts = substream->rmidi->private_data;
+        unsigned long flags;
+
+        --(mts->open_count);
+        if (mts->open_count == 0) {
+                /* We need the spinlock_irqsave here because we can still
+                   have IRQs at this point */
+                spin_lock_irqsave(&mts->lock, flags);
+                mts64_device_close(mts);
+                spin_unlock_irqrestore(&mts->lock, flags);
+
+                msleep(500);
+
+        } else if (mts->open_count < 0)
+                mts->open_count = 0;
+
+        return 0;
+}
+
+static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
+                                             int up)
+{
+        struct mts64 *mts = substream->rmidi->private_data;
+        u8 data;
+        unsigned long flags;
+
+        spin_lock_irqsave(&mts->lock, flags);
+        while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
+                mts64_write_midi(mts, data, substream->number+1);
+                snd_rawmidi_transmit_ack(substream, 1);
+        }
+        spin_unlock_irqrestore(&mts->lock, flags);
+}
+
+static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
+                                            int up)
+{
+        struct mts64 *mts = substream->rmidi->private_data;
+        unsigned long flags;
+
+        spin_lock_irqsave(&mts->lock, flags);
+        if (up)
+                mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
+        else
+                mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
+        
+        spin_unlock_irqrestore(&mts->lock, flags);
+}
+
+static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
+        .open    = snd_mts64_rawmidi_open,
+        .close   = snd_mts64_rawmidi_close,
+        .trigger = snd_mts64_rawmidi_output_trigger
+};
+
+static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
+        .open    = snd_mts64_rawmidi_open,
+        .close   = snd_mts64_rawmidi_close,
+        .trigger = snd_mts64_rawmidi_input_trigger
+};
+
+/* Create and initialize the rawmidi component */
+static int __devinit snd_mts64_rawmidi_create(struct snd_card *card)
+{
+        struct mts64 *mts = card->private_data;
+        struct snd_rawmidi *rmidi;
+        struct snd_rawmidi_substream *substream;
+        struct list_head *list;
+        int err;
+        
+        err = snd_rawmidi_new(card, CARD_NAME, 0, 
+                              MTS64_NUM_OUTPUT_PORTS, 
+                              MTS64_NUM_INPUT_PORTS, 
+                              &rmidi);
+        if (err < 0) 
+                return err;
+
+        rmidi->private_data = mts;
+        strcpy(rmidi->name, CARD_NAME);
+        rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
+                            SNDRV_RAWMIDI_INFO_INPUT |
+                            SNDRV_RAWMIDI_INFO_DUPLEX;
+
+        mts->rmidi = rmidi;
+
+        /* register rawmidi ops */
+        snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 
+                            &snd_mts64_rawmidi_output_ops);
+        snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 
+                            &snd_mts64_rawmidi_input_ops);
+
+        /* name substreams */
+        /* output */
+        list_for_each(list, 
+                      &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
+                substream = list_entry(list, struct snd_rawmidi_substream, list);
+                sprintf(substream->name,
+                        "Miditerminal %d", substream->number+1);
+        }
+        /* input */
+        list_for_each(list, 
+                      &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
+                substream = list_entry(list, struct snd_rawmidi_substream, list);
+                mts->midi_input_substream[substream->number] = substream;
+                switch(substream->number) {
+                case MTS64_SMPTE_SUBSTREAM:
+                        strcpy(substream->name, "Miditerminal SMPTE");
+                        break;
+                default:
+                        sprintf(substream->name,
+                                "Miditerminal %d", substream->number+1);
+                }
+        }
+
+        /* controls */
+        err = snd_mts64_ctl_create(card, mts);
+
+        return err;
+}
+
+/*********************************************************************
+ * parport stuff
+ *********************************************************************/
+static void snd_mts64_interrupt(int irq, void *private, struct pt_regs *r)
+{
+        struct mts64 *mts = ((struct snd_card*)private)->private_data;
+        u16 ret;
+        u8 status, data;
+        struct snd_rawmidi_substream *substream;
+
+        spin_lock(&mts->lock);
+        ret = mts64_read(mts->pardev->port);
+        data = ret & 0x00ff;
+        status = ret >> 8;
+
+        if (status & MTS64_STAT_PORT) {
+                mts->current_midi_input_port = mts64_map_midi_input(data);
+        } else {
+                if (mts->current_midi_input_port == -1) 
+                        goto __out;
+                substream = mts->midi_input_substream[mts->current_midi_input_port];
+                if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
+                        snd_rawmidi_receive(substream, &data, 1);
+        }
+__out:
+        spin_unlock(&mts->lock);
+}
+
+static int __devinit snd_mts64_probe_port(struct parport *p)
+{
+        struct pardevice *pardev;
+        int res;
+
+        pardev = parport_register_device(p, DRIVER_NAME,
+                                         NULL, NULL, NULL,
+                                         0, NULL);
+        if (!pardev)
+                return -EIO;
+        
+        if (parport_claim(pardev)) {
+                parport_unregister_device(pardev);
+                return -EIO;
+        }
+
+        res = mts64_probe(p);
+
+        parport_release(pardev);
+        parport_unregister_device(pardev);
+
+        return res;
+}
+
+static void __devinit snd_mts64_attach(struct parport *p)
+{
+        struct platform_device *device;
+
+        device = platform_device_alloc(PLATFORM_DRIVER, device_count);
+        if (!device) 
+                return;
+
+        /* Temporary assignment to forward the parport */
+        platform_set_drvdata(device, p);
+
+        if (platform_device_register(device) < 0) {
+                platform_device_put(device);
+                return;
+        }
+
+        /* Since we dont get the return value of probe
+         * We need to check if device probing succeeded or not */
+        if (!platform_get_drvdata(device)) {
+                platform_device_unregister(device);
+                return;
+        }
+
+        /* register device in global table */
+        platform_devices[device_count] = device;
+        device_count++;
+}
+
+static void snd_mts64_detach(struct parport *p)
+{
+        /* nothing to do here */
+}
+
+static struct parport_driver mts64_parport_driver = {
+        .name   = "mts64",
+        .attach = snd_mts64_attach,
+        .detach = snd_mts64_detach
+};
+
+/*********************************************************************
+ * platform stuff
+ *********************************************************************/
+static void snd_mts64_card_private_free(struct snd_card *card)
+{
+        struct mts64 *mts = card->private_data;
+        struct pardevice *pardev = mts->pardev;
+
+        if (pardev) {
+                if (mts->pardev_claimed)
+                        parport_release(pardev);
+                parport_unregister_device(pardev);
+        }
+
+        snd_mts64_free(mts);
+}
+
+static int __devinit snd_mts64_probe(struct platform_device *pdev)
+{
+        struct pardevice *pardev;
+        struct parport *p;
+        int dev = pdev->id;
+        struct snd_card *card = NULL;
+        struct mts64 *mts = NULL;
+        int err;
+
+        p = platform_get_drvdata(pdev);
+        platform_set_drvdata(pdev, NULL);
+
+        if (dev >= SNDRV_CARDS)
+                return -ENODEV;
+        if (!enable[dev]) 
+                return -ENOENT;
+        if ((err = snd_mts64_probe_port(p)) < 0)
+                return err;
+
+        card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+        if (card == NULL) {
+                snd_printd("Cannot create card\n");
+                return -ENOMEM;
+        }
+        strcpy(card->driver, DRIVER_NAME);
+        strcpy(card->shortname, "ESI " CARD_NAME);
+        sprintf(card->longname,  "%s at 0x%lx, irq %i", 
+                card->shortname, p->base, p->irq);
+
+        pardev = parport_register_device(p,                   /* port */
+                                         DRIVER_NAME,         /* name */
+                                         NULL,                /* preempt */
+                                         NULL,                /* wakeup */
+                                         snd_mts64_interrupt, /* ISR */
+                                         PARPORT_DEV_EXCL,    /* flags */
+                                         (void *)card);       /* private */
+        if (pardev == NULL) {
+                snd_printd("Cannot register pardevice\n");
+                err = -EIO;
+                goto __err;
+        }
+
+        if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
+                snd_printd("Cannot create main component\n");
+                parport_unregister_device(pardev);
+                goto __err;
+        }
+        card->private_data = mts;
+        card->private_free = snd_mts64_card_private_free;
+        
+        if ((err = snd_mts64_rawmidi_create(card)) < 0) {
+                snd_printd("Creating Rawmidi component failed\n");
+                goto __err;
+        }
+
+        /* claim parport */
+        if (parport_claim(pardev)) {
+                snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
+                err = -EIO;
+                goto __err;
+        }
+        mts->pardev_claimed = 1;
+
+        /* init device */
+        if ((err = mts64_device_init(p)) < 0)
+                goto __err;
+
+        platform_set_drvdata(pdev, card);
+
+        /* At this point card will be usable */
+        if ((err = snd_card_register(card)) < 0) {
+                snd_printd("Cannot register card\n");
+                goto __err;
+        }
+
+        snd_printk("ESI Miditerminal 4140 on 0x%lx\n", p->base);
+        return 0;
+
+__err:
+        snd_card_free(card);
+        return err;
+}
+
+static int snd_mts64_remove(struct platform_device *pdev)
+{
+        struct snd_card *card = platform_get_drvdata(pdev);
+
+        if (card)
+                snd_card_free(card);
+
+        return 0;
+}
+
+
+static struct platform_driver snd_mts64_driver = {
+        .probe  = snd_mts64_probe,
+        .remove = snd_mts64_remove,
+        .driver = {
+                .name = PLATFORM_DRIVER
+        }
+};
+
+/*********************************************************************
+ * module init stuff
+ *********************************************************************/
+static void snd_mts64_unregister_all(void)
+{
+        int i;
+
+        for (i = 0; i < SNDRV_CARDS; ++i) {
+                if (platform_devices[i]) {
+                        platform_device_unregister(platform_devices[i]);
+                        platform_devices[i] = NULL;
+                }
+        }               
+        platform_driver_unregister(&snd_mts64_driver);
+        parport_unregister_driver(&mts64_parport_driver);
+}
+
+static int __init snd_mts64_module_init(void)
+{
+        int err;
+
+        if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
+                return err;
+
+        if (parport_register_driver(&mts64_parport_driver) != 0) {
+                platform_driver_unregister(&snd_mts64_driver);
+                return -EIO;
+        }
+
+        if (device_count == 0) {
+                snd_mts64_unregister_all();
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+static void __exit snd_mts64_module_exit(void)
+{
+        snd_mts64_unregister_all();
+}
+
+module_init(snd_mts64_module_init);
+module_exit(snd_mts64_module_exit);