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WSL2-Linux-Kernel/sound/drivers/mts64.c

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C
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
* Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/parport.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/slab.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 bool 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, 0444);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
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 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 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 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 const 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 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 const 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 */
#define snd_mts64_ctl_smpte_switch_info snd_ctl_boolean_mono_info
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;
int val = !!uctl->value.integer.value[0];
spin_lock_irq(&mts->lock);
if (mts->smpte_switch == val)
goto __out;
changed = 1;
mts->smpte_switch = val;
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 const struct snd_kcontrol_new mts64_ctl_smpte_switch = {
.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;
unsigned int time = uctl->value.integer.value[0] % 60;
int changed = 0;
spin_lock_irq(&mts->lock);
if (mts->time[idx] != time) {
changed = 1;
mts->time[idx] = time;
}
spin_unlock_irq(&mts->lock);
return changed;
}
static const struct snd_kcontrol_new mts64_ctl_smpte_time_hours = {
.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 const struct snd_kcontrol_new mts64_ctl_smpte_time_minutes = {
.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 const struct snd_kcontrol_new mts64_ctl_smpte_time_seconds = {
.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 const struct snd_kcontrol_new mts64_ctl_smpte_time_frames = {
.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 const char * const texts[5] = {
"24", "25", "29.97", "30D", "30"
};
return snd_ctl_enum_info(uinfo, 1, 5, texts);
}
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;
if (uctl->value.enumerated.item[0] >= 5)
return -EINVAL;
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 const struct snd_kcontrol_new mts64_ctl_smpte_fps = {
.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 snd_mts64_ctl_create(struct snd_card *card,
struct mts64 *mts)
{
int err, i;
static const 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,
NULL };
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 const 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 const 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 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(void *private)
{
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 void 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_add(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 int snd_mts64_dev_probe(struct pardevice *pardev)
{
if (strcmp(pardev->name, DRIVER_NAME))
return -ENODEV;
return 0;
}
static struct parport_driver mts64_parport_driver = {
.name = "mts64",
.probe = snd_mts64_dev_probe,
.match_port = snd_mts64_attach,
.detach = snd_mts64_detach,
.devmodel = true,
};
/*********************************************************************
* 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) {
parport_release(pardev);
parport_unregister_device(pardev);
}
snd_mts64_free(mts);
}
static int 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;
struct pardev_cb mts64_cb = {
.preempt = NULL,
.wakeup = NULL,
.irq_func = snd_mts64_interrupt, /* ISR */
.flags = PARPORT_DEV_EXCL, /* flags */
};
p = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev])
return -ENOENT;
err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
0, &card);
if (err < 0) {
snd_printd("Cannot create card\n");
return err;
}
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);
mts64_cb.private = card; /* private */
pardev = parport_register_dev_model(p, /* port */
DRIVER_NAME, /* name */
&mts64_cb, /* callbacks */
pdev->id); /* device number */
if (!pardev) {
snd_printd("Cannot register pardevice\n");
err = -EIO;
goto __err;
}
/* claim parport */
if (parport_claim(pardev)) {
snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
err = -EIO;
goto free_pardev;
}
if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
snd_printd("Cannot create main component\n");
goto release_pardev;
}
card->private_data = mts;
card->private_free = snd_mts64_card_private_free;
err = mts64_probe(p);
if (err) {
err = -EIO;
goto __err;
}
if ((err = snd_mts64_rawmidi_create(card)) < 0) {
snd_printd("Creating Rawmidi component failed\n");
goto __err;
}
/* 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(KERN_INFO "ESI Miditerminal 4140 on 0x%lx\n", p->base);
return 0;
release_pardev:
parport_release(pardev);
free_pardev:
parport_unregister_device(pardev);
__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);
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