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linux/sound/drivers/mtpav.c

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/*
* MOTU Midi Timepiece ALSA Main routines
* Copyright by Michael T. Mayers (c) Jan 09, 2000
* mail: michael@tweakoz.com
* Thanks to John Galbraith
*
* 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
*
*
* This driver is for the 'Mark Of The Unicorn' (MOTU)
* MidiTimePiece AV multiport MIDI interface
*
* IOPORTS
* -------
* 8 MIDI Ins and 8 MIDI outs
* Video Sync In (BNC), Word Sync Out (BNC),
* ADAT Sync Out (DB9)
* SMPTE in/out (1/4")
* 2 programmable pedal/footswitch inputs and 4 programmable MIDI controller knobs.
* Macintosh RS422 serial port
* RS422 "network" port for ganging multiple MTP's
* PC Parallel Port ( which this driver currently uses )
*
* MISC FEATURES
* -------------
* Hardware MIDI routing, merging, and filtering
* MIDI Synchronization to Video, ADAT, SMPTE and other Clock sources
* 128 'scene' memories, recallable from MIDI program change
*
*
* ChangeLog
* Jun 11 2001 Takashi Iwai <tiwai@suse.de>
* - Recoded & debugged
* - Added timer interrupt for midi outputs
* - hwports is between 1 and 8, which specifies the number of hardware ports.
* The three global ports, computer, adat and broadcast ports, are created
* always after h/w and remote ports.
*
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/rawmidi.h>
#include <linux/delay.h>
#include <asm/io.h>
/*
* globals
*/
MODULE_AUTHOR("Michael T. Mayers");
MODULE_DESCRIPTION("MOTU MidiTimePiece AV multiport MIDI");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{MOTU,MidiTimePiece AV multiport MIDI}}");
// io resources
#define MTPAV_IOBASE 0x378
#define MTPAV_IRQ 7
#define MTPAV_MAX_PORTS 8
static int index = SNDRV_DEFAULT_IDX1;
static char *id = SNDRV_DEFAULT_STR1;
static long port = MTPAV_IOBASE; /* 0x378, 0x278 */
static int irq = MTPAV_IRQ; /* 7, 5 */
static int hwports = MTPAV_MAX_PORTS; /* use hardware ports 1-8 */
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for MotuMTPAV MIDI.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for MotuMTPAV MIDI.");
module_param(port, long, 0444);
MODULE_PARM_DESC(port, "Parallel port # for MotuMTPAV MIDI.");
module_param(irq, int, 0444);
MODULE_PARM_DESC(irq, "Parallel IRQ # for MotuMTPAV MIDI.");
module_param(hwports, int, 0444);
MODULE_PARM_DESC(hwports, "Hardware ports # for MotuMTPAV MIDI.");
/*
* defines
*/
//#define USE_FAKE_MTP // don't actually read/write to MTP device (for debugging without an actual unit) (does not work yet)
// parallel port usage masks
#define SIGS_BYTE 0x08
#define SIGS_RFD 0x80
#define SIGS_IRQ 0x40
#define SIGS_IN0 0x10
#define SIGS_IN1 0x20
#define SIGC_WRITE 0x04
#define SIGC_READ 0x08
#define SIGC_INTEN 0x10
#define DREG 0
#define SREG 1
#define CREG 2
//
#define MTPAV_MODE_INPUT_OPENED 0x01
#define MTPAV_MODE_OUTPUT_OPENED 0x02
#define MTPAV_MODE_INPUT_TRIGGERED 0x04
#define MTPAV_MODE_OUTPUT_TRIGGERED 0x08
#define NUMPORTS (0x12+1)
/*
*/
typedef struct mtpav_port {
u8 number;
u8 hwport;
u8 mode;
u8 running_status;
snd_rawmidi_substream_t *input;
snd_rawmidi_substream_t *output;
} mtpav_port_t;
typedef struct mtpav {
snd_card_t *card;
unsigned long port;
struct resource *res_port;
int irq; /* interrupt (for inputs) */
spinlock_t spinlock;
int share_irq; /* number of accesses to input interrupts */
int istimer; /* number of accesses to timer interrupts */
struct timer_list timer; /* timer interrupts for outputs */
snd_rawmidi_t *rmidi;
int num_ports; /* number of hw ports (1-8) */
mtpav_port_t ports[NUMPORTS]; /* all ports including computer, adat and bc */
u32 inmidiport; /* selected input midi port */
u32 inmidistate; /* during midi command 0xf5 */
u32 outmidihwport; /* selected output midi hw port */
} mtpav_t;
/*
* global instance
* hey, we handle at most only one card..
*/
static mtpav_t *mtp_card;
/*
* possible hardware ports (selected by 0xf5 port message)
* 0x00 all ports
* 0x01 .. 0x08 this MTP's ports 1..8
* 0x09 .. 0x10 networked MTP's ports (9..16)
* 0x11 networked MTP's computer port
* 0x63 to ADAT
*
* mappig:
* subdevice 0 - (X-1) ports
* X - (2*X-1) networked ports
* X computer
* X+1 ADAT
* X+2 all ports
*
* where X = chip->num_ports
*/
#define MTPAV_PIDX_COMPUTER 0
#define MTPAV_PIDX_ADAT 1
#define MTPAV_PIDX_BROADCAST 2
static int translate_subdevice_to_hwport(mtpav_t *chip, int subdev)
{
if (subdev < 0)
return 0x01; /* invalid - use port 0 as default */
else if (subdev < chip->num_ports)
return subdev + 1; /* single mtp port */
else if (subdev < chip->num_ports * 2)
return subdev - chip->num_ports + 0x09; /* remote port */
else if (subdev == chip->num_ports * 2 + MTPAV_PIDX_COMPUTER)
return 0x11; /* computer port */
else if (subdev == chip->num_ports + MTPAV_PIDX_ADAT)
return 0x63; /* ADAT */
return 0; /* all ports */
}
static int translate_hwport_to_subdevice(mtpav_t *chip, int hwport)
{
int p;
if (hwport <= 0x00) /* all ports */
return chip->num_ports + MTPAV_PIDX_BROADCAST;
else if (hwport <= 0x08) { /* single port */
p = hwport - 1;
if (p >= chip->num_ports)
p = 0;
return p;
} else if (hwport <= 0x10) { /* remote port */
p = hwport - 0x09 + chip->num_ports;
if (p >= chip->num_ports * 2)
p = chip->num_ports;
return p;
} else if (hwport == 0x11) /* computer port */
return chip->num_ports + MTPAV_PIDX_COMPUTER;
else /* ADAT */
return chip->num_ports + MTPAV_PIDX_ADAT;
}
/*
*/
static u8 snd_mtpav_getreg(mtpav_t *chip, u16 reg)
{
u8 rval = 0;
if (reg == SREG) {
rval = inb(chip->port + SREG);
rval = (rval & 0xf8);
} else if (reg == CREG) {
rval = inb(chip->port + CREG);
rval = (rval & 0x1c);
}
return rval;
}
/*
*/
static void snd_mtpav_mputreg(mtpav_t *chip, u16 reg, u8 val)
{
if (reg == DREG) {
outb(val, chip->port + DREG);
} else if (reg == CREG) {
outb(val, chip->port + CREG);
}
}
/*
*/
static void snd_mtpav_wait_rfdhi(mtpav_t *chip)
{
int counts = 10000;
u8 sbyte;
sbyte = snd_mtpav_getreg(chip, SREG);
while (!(sbyte & SIGS_RFD) && counts--) {
sbyte = snd_mtpav_getreg(chip, SREG);
udelay(10);
}
}
static void snd_mtpav_send_byte(mtpav_t *chip, u8 byte)
{
u8 tcbyt;
u8 clrwrite;
u8 setwrite;
snd_mtpav_wait_rfdhi(chip);
/////////////////
tcbyt = snd_mtpav_getreg(chip, CREG);
clrwrite = tcbyt & (SIGC_WRITE ^ 0xff);
setwrite = tcbyt | SIGC_WRITE;
snd_mtpav_mputreg(chip, DREG, byte);
snd_mtpav_mputreg(chip, CREG, clrwrite); // clear write bit
snd_mtpav_mputreg(chip, CREG, setwrite); // set write bit
}
/*
*/
/* call this with spin lock held */
static void snd_mtpav_output_port_write(mtpav_port_t *port,
snd_rawmidi_substream_t *substream)
{
u8 outbyte;
// Get the outbyte first, so we can emulate running status if
// necessary
if (snd_rawmidi_transmit(substream, &outbyte, 1) != 1)
return;
// send port change command if necessary
if (port->hwport != mtp_card->outmidihwport) {
mtp_card->outmidihwport = port->hwport;
snd_mtpav_send_byte(mtp_card, 0xf5);
snd_mtpav_send_byte(mtp_card, port->hwport);
//snd_printk("new outport: 0x%x\n", (unsigned int) port->hwport);
if (!(outbyte & 0x80) && port->running_status)
snd_mtpav_send_byte(mtp_card, port->running_status);
}
// send data
do {
if (outbyte & 0x80)
port->running_status = outbyte;
snd_mtpav_send_byte(mtp_card, outbyte);
} while (snd_rawmidi_transmit(substream, &outbyte, 1) == 1);
}
static void snd_mtpav_output_write(snd_rawmidi_substream_t * substream)
{
mtpav_port_t *port = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
snd_mtpav_output_port_write(port, substream);
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
}
/*
* mtpav control
*/
static void snd_mtpav_portscan(mtpav_t *chip) // put mtp into smart routing mode
{
u8 p;
for (p = 0; p < 8; p++) {
snd_mtpav_send_byte(chip, 0xf5);
snd_mtpav_send_byte(chip, p);
snd_mtpav_send_byte(chip, 0xfe);
}
}
/*
*/
static int snd_mtpav_input_open(snd_rawmidi_substream_t * substream)
{
unsigned long flags;
mtpav_port_t *portp = &mtp_card->ports[substream->number];
//printk("mtpav port: %d opened\n", (int) substream->number);
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode |= MTPAV_MODE_INPUT_OPENED;
portp->input = substream;
if (mtp_card->share_irq++ == 0)
snd_mtpav_mputreg(mtp_card, CREG, (SIGC_INTEN | SIGC_WRITE)); // enable pport interrupts
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
}
/*
*/
static int snd_mtpav_input_close(snd_rawmidi_substream_t *substream)
{
unsigned long flags;
mtpav_port_t *portp = &mtp_card->ports[substream->number];
//printk("mtpav port: %d closed\n", (int) portp);
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode &= (~MTPAV_MODE_INPUT_OPENED);
portp->input = NULL;
if (--mtp_card->share_irq == 0)
snd_mtpav_mputreg(mtp_card, CREG, 0); // disable pport interrupts
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
}
/*
*/
static void snd_mtpav_input_trigger(snd_rawmidi_substream_t * substream, int up)
{
unsigned long flags;
mtpav_port_t *portp = &mtp_card->ports[substream->number];
spin_lock_irqsave(&mtp_card->spinlock, flags);
if (up)
portp->mode |= MTPAV_MODE_INPUT_TRIGGERED;
else
portp->mode &= ~MTPAV_MODE_INPUT_TRIGGERED;
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
}
/*
* timer interrupt for outputs
*/
static void snd_mtpav_output_timer(unsigned long data)
{
unsigned long flags;
mtpav_t *chip = (mtpav_t *)data;
int p;
spin_lock_irqsave(&chip->spinlock, flags);
/* reprogram timer */
chip->timer.expires = 1 + jiffies;
add_timer(&chip->timer);
/* process each port */
for (p = 0; p <= chip->num_ports * 2 + MTPAV_PIDX_BROADCAST; p++) {
mtpav_port_t *portp = &mtp_card->ports[p];
if ((portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED) && portp->output)
snd_mtpav_output_port_write(portp, portp->output);
}
spin_unlock_irqrestore(&chip->spinlock, flags);
}
/* spinlock held! */
static void snd_mtpav_add_output_timer(mtpav_t *chip)
{
init_timer(&chip->timer);
chip->timer.function = snd_mtpav_output_timer;
chip->timer.data = (unsigned long) mtp_card;
chip->timer.expires = 1 + jiffies;
add_timer(&chip->timer);
}
/* spinlock held! */
static void snd_mtpav_remove_output_timer(mtpav_t *chip)
{
del_timer(&chip->timer);
}
/*
*/
static int snd_mtpav_output_open(snd_rawmidi_substream_t * substream)
{
unsigned long flags;
mtpav_port_t *portp = &mtp_card->ports[substream->number];
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode |= MTPAV_MODE_OUTPUT_OPENED;
portp->output = substream;
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
};
/*
*/
static int snd_mtpav_output_close(snd_rawmidi_substream_t * substream)
{
unsigned long flags;
mtpav_port_t *portp = &mtp_card->ports[substream->number];
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode &= (~MTPAV_MODE_OUTPUT_OPENED);
portp->output = NULL;
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
};
/*
*/
static void snd_mtpav_output_trigger(snd_rawmidi_substream_t * substream, int up)
{
unsigned long flags;
mtpav_port_t *portp = &mtp_card->ports[substream->number];
spin_lock_irqsave(&mtp_card->spinlock, flags);
if (up) {
if (! (portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED)) {
if (mtp_card->istimer++ == 0)
snd_mtpav_add_output_timer(mtp_card);
portp->mode |= MTPAV_MODE_OUTPUT_TRIGGERED;
}
} else {
portp->mode &= ~MTPAV_MODE_OUTPUT_TRIGGERED;
if (--mtp_card->istimer == 0)
snd_mtpav_remove_output_timer(mtp_card);
}
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
if (up)
snd_mtpav_output_write(substream);
}
/*
* midi interrupt for inputs
*/
static void snd_mtpav_inmidi_process(mtpav_t *mcrd, u8 inbyte)
{
mtpav_port_t *portp;
if ((int)mcrd->inmidiport > mcrd->num_ports * 2 + MTPAV_PIDX_BROADCAST)
return;
portp = &mcrd->ports[mcrd->inmidiport];
if (portp->mode & MTPAV_MODE_INPUT_TRIGGERED) {
snd_rawmidi_receive(portp->input, &inbyte, 1);
}
}
static void snd_mtpav_inmidi_h(mtpav_t * mcrd, u8 inbyte)
{
snd_assert(mcrd, return);
if (inbyte >= 0xf8) {
/* real-time midi code */
snd_mtpav_inmidi_process(mcrd, inbyte);
return;
}
if (mcrd->inmidistate == 0) { // awaiting command
if (inbyte == 0xf5) // MTP port #
mcrd->inmidistate = 1;
else
snd_mtpav_inmidi_process(mcrd, inbyte);
} else if (mcrd->inmidistate) {
mcrd->inmidiport = translate_hwport_to_subdevice(mcrd, inbyte);
mcrd->inmidistate = 0;
}
}
static void snd_mtpav_read_bytes(mtpav_t * mcrd)
{
u8 clrread, setread;
u8 mtp_read_byte;
u8 sr, cbyt;
int i;
u8 sbyt = snd_mtpav_getreg(mcrd, SREG);
//printk("snd_mtpav_read_bytes() sbyt: 0x%x\n", sbyt);
if (!(sbyt & SIGS_BYTE))
return;
cbyt = snd_mtpav_getreg(mcrd, CREG);
clrread = cbyt & (SIGC_READ ^ 0xff);
setread = cbyt | SIGC_READ;
do {
mtp_read_byte = 0;
for (i = 0; i < 4; i++) {
snd_mtpav_mputreg(mcrd, CREG, setread);
sr = snd_mtpav_getreg(mcrd, SREG);
snd_mtpav_mputreg(mcrd, CREG, clrread);
sr &= SIGS_IN0 | SIGS_IN1;
sr >>= 4;
mtp_read_byte |= sr << (i * 2);
}
snd_mtpav_inmidi_h(mcrd, mtp_read_byte);
sbyt = snd_mtpav_getreg(mcrd, SREG);
} while (sbyt & SIGS_BYTE);
}
static irqreturn_t snd_mtpav_irqh(int irq, void *dev_id, struct pt_regs *regs)
{
mtpav_t *mcard = dev_id;
//printk("irqh()\n");
spin_lock(&mcard->spinlock);
snd_mtpav_read_bytes(mcard);
spin_unlock(&mcard->spinlock);
return IRQ_HANDLED;
}
/*
* get ISA resources
*/
static int snd_mtpav_get_ISA(mtpav_t * mcard)
{
if ((mcard->res_port = request_region(port, 3, "MotuMTPAV MIDI")) == NULL) {
snd_printk("MTVAP port 0x%lx is busy\n", port);
return -EBUSY;
}
mcard->port = port;
if (request_irq(irq, snd_mtpav_irqh, SA_INTERRUPT, "MOTU MTPAV", (void *)mcard)) {
snd_printk("MTVAP IRQ %d busy\n", irq);
return -EBUSY;
}
mcard->irq = irq;
return 0;
}
/*
*/
static snd_rawmidi_ops_t snd_mtpav_output = {
.open = snd_mtpav_output_open,
.close = snd_mtpav_output_close,
.trigger = snd_mtpav_output_trigger,
};
static snd_rawmidi_ops_t snd_mtpav_input = {
.open = snd_mtpav_input_open,
.close = snd_mtpav_input_close,
.trigger = snd_mtpav_input_trigger,
};
/*
* get RAWMIDI resources
*/
static void snd_mtpav_set_name(mtpav_t *chip, snd_rawmidi_substream_t *substream)
{
if (substream->number >= 0 && substream->number < chip->num_ports)
sprintf(substream->name, "MTP direct %d", (substream->number % chip->num_ports) + 1);
else if (substream->number >= 8 && substream->number < chip->num_ports * 2)
sprintf(substream->name, "MTP remote %d", (substream->number % chip->num_ports) + 1);
else if (substream->number == chip->num_ports * 2)
strcpy(substream->name, "MTP computer");
else if (substream->number == chip->num_ports * 2 + 1)
strcpy(substream->name, "MTP ADAT");
else
strcpy(substream->name, "MTP broadcast");
}
static int snd_mtpav_get_RAWMIDI(mtpav_t * mcard)
{
int rval = 0;
snd_rawmidi_t *rawmidi;
snd_rawmidi_substream_t *substream;
struct list_head *list;
//printk("entering snd_mtpav_get_RAWMIDI\n");
if (hwports < 1)
mcard->num_ports = 1;
else if (hwports > 8)
mcard->num_ports = 8;
else
mcard->num_ports = hwports;
if ((rval = snd_rawmidi_new(mcard->card, "MotuMIDI", 0,
mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
&mcard->rmidi)) < 0)
return rval;
rawmidi = mcard->rmidi;
list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
substream = list_entry(list, snd_rawmidi_substream_t, list);
snd_mtpav_set_name(mcard, substream);
substream->ops = &snd_mtpav_input;
}
list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
substream = list_entry(list, snd_rawmidi_substream_t, list);
snd_mtpav_set_name(mcard, substream);
substream->ops = &snd_mtpav_output;
mcard->ports[substream->number].hwport = translate_subdevice_to_hwport(mcard, substream->number);
}
rawmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
sprintf(rawmidi->name, "MTP AV MIDI");
//printk("exiting snd_mtpav_get_RAWMIDI() \n");
return 0;
}
/*
*/
static mtpav_t *new_mtpav(void)
{
mtpav_t *ncrd = kzalloc(sizeof(*ncrd), GFP_KERNEL);
if (ncrd != NULL) {
spin_lock_init(&ncrd->spinlock);
init_timer(&ncrd->timer);
ncrd->card = NULL;
ncrd->irq = -1;
ncrd->share_irq = 0;
ncrd->inmidiport = 0xffffffff;
ncrd->inmidistate = 0;
ncrd->outmidihwport = 0xffffffff;
}
return ncrd;
}
/*
*/
static void free_mtpav(mtpav_t * crd)
{
unsigned long flags;
spin_lock_irqsave(&crd->spinlock, flags);
if (crd->istimer > 0)
snd_mtpav_remove_output_timer(crd);
spin_unlock_irqrestore(&crd->spinlock, flags);
if (crd->irq >= 0)
free_irq(crd->irq, (void *)crd);
if (crd->res_port) {
release_resource(crd->res_port);
kfree_nocheck(crd->res_port);
}
kfree(crd);
}
/*
*/
static int __init alsa_card_mtpav_init(void)
{
int err = 0;
char longname_buffer[80];
mtp_card = new_mtpav();
if (mtp_card == NULL)
return -ENOMEM;
mtp_card->card = snd_card_new(index, id, THIS_MODULE, 0);
if (mtp_card->card == NULL) {
free_mtpav(mtp_card);
return -ENOMEM;
}
err = snd_mtpav_get_ISA(mtp_card);
//printk("snd_mtpav_get_ISA returned: %d\n", err);
if (err < 0)
goto __error;
strcpy(mtp_card->card->driver, "MTPAV");
strcpy(mtp_card->card->shortname, "MTPAV on parallel port");
memset(longname_buffer, 0, sizeof(longname_buffer));
sprintf(longname_buffer, "MTPAV on parallel port at");
err = snd_mtpav_get_RAWMIDI(mtp_card);
//snd_printk("snd_mtapv_get_RAWMIDI returned: %d\n", err);
if (err < 0)
goto __error;
if ((err = snd_card_set_generic_dev(mtp_card->card)) < 0)
goto __error;
err = snd_card_register(mtp_card->card); // don't snd_card_register until AFTER all cards reources done!
//printk("snd_card_register returned %d\n", err);
if (err < 0)
goto __error;
snd_mtpav_portscan(mtp_card);
printk(KERN_INFO "Motu MidiTimePiece on parallel port irq: %d ioport: 0x%lx\n", irq, port);
return 0;
__error:
snd_card_free(mtp_card->card);
free_mtpav(mtp_card);
return err;
}
/*
*/
static void __exit alsa_card_mtpav_exit(void)
{
if (mtp_card == NULL)
return;
if (mtp_card->card)
snd_card_free(mtp_card->card);
free_mtpav(mtp_card);
}
/*
*/
module_init(alsa_card_mtpav_init)
module_exit(alsa_card_mtpav_exit)
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