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freebsd/sys/i386/isa/sound/mpu401.c
Jordan K. Hubbard ae28ee13b4 Update the sound driver to VOXWARE 3.05 with one GUS patch from 
Amancio.  There is some SoundSource support here that is primitive and
probably doesn't work, but I'll let the two submitters let me know
how my integration of that was since I don't have this card to test.
I've only tested this on my GUS MAX since it's all I have.

This all probably needs to be re-done anyway since we're widely variant
from the original VOXWARE source in the current layout.
Submitted by:	Amancio Hasty and Jim Lowe
Obtained from:  Hannu Savolainen
1995-07-28 21:40:49 +00:00

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/*
* sound/mpu401.c
*
* The low level driver for Roland MPU-401 compatible Midi cards.
*
* Copyright by Hannu Savolainen 1993
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. 2.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Modified:
* Riccardo Facchetti 24 Mar 1995
* - Added the Audio Excel DSP 16 initialization routine.
*/
#define USE_SEQ_MACROS
#define USE_SIMPLE_MACROS
#include "sound_config.h"
#ifdef CONFIGURE_SOUNDCARD
#if (!defined(EXCLUDE_MPU401) || !defined(EXCLUDE_MPU_EMU)) && !defined(EXCLUDE_MIDI)
#include "coproc.h"
static int init_sequence[20]; /* NOTE! pos 0 = len, start pos 1. */
static int timer_mode = TMR_INTERNAL, timer_caps = TMR_INTERNAL;
struct mpu_config
{
int base; /*
* I/O base
*/
int irq;
int opened; /*
* Open mode
*/
int devno;
int synthno;
int uart_mode;
int initialized;
int mode;
#define MODE_MIDI 1
#define MODE_SYNTH 2
unsigned char version, revision;
unsigned int capabilities;
#define MPU_CAP_INTLG 0x10000000
#define MPU_CAP_SYNC 0x00000010
#define MPU_CAP_FSK 0x00000020
#define MPU_CAP_CLS 0x00000040
#define MPU_CAP_SMPTE 0x00000080
#define MPU_CAP_2PORT 0x00000001
int timer_flag;
#define MBUF_MAX 10
#define BUFTEST(dc) if (dc->m_ptr >= MBUF_MAX || dc->m_ptr < 0) \
{printk("MPU: Invalid buffer pointer %d/%d, s=%d\n", dc->m_ptr, dc->m_left, dc->m_state);dc->m_ptr--;}
int m_busy;
unsigned char m_buf[MBUF_MAX];
int m_ptr;
int m_state;
int m_left;
unsigned char last_status;
void (*inputintr) (int dev, unsigned char data);
int shared_irq;
};
#define DATAPORT(base) (base)
#define COMDPORT(base) (base+1)
#define STATPORT(base) (base+1)
#define mpu401_status(base) INB(STATPORT(base))
#define input_avail(base) (!(mpu401_status(base)&INPUT_AVAIL))
#define output_ready(base) (!(mpu401_status(base)&OUTPUT_READY))
#define write_command(base, cmd) OUTB(cmd, COMDPORT(base))
#define read_data(base) INB(DATAPORT(base))
#define write_data(base, byte) OUTB(byte, DATAPORT(base))
#define OUTPUT_READY 0x40
#define INPUT_AVAIL 0x80
#define MPU_ACK 0xF7
#define MPU_RESET 0xFF
#define UART_MODE_ON 0x3F
static struct mpu_config dev_conf[MAX_MIDI_DEV] =
{
{0}};
static int n_mpu_devs = 0;
static int irq2dev[16] =
{-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1};
static int reset_mpu401 (struct mpu_config *devc);
static void set_uart_mode (int dev, struct mpu_config *devc, int arg);
static void mpu_timer_init (int midi_dev);
static void mpu_timer_interrupt (void);
static void timer_ext_event (struct mpu_config *devc, int event, int parm);
static struct synth_info mpu_synth_info_proto =
{"MPU-401 MIDI interface", 0, SYNTH_TYPE_MIDI, 0, 0, 128, 0, 128, SYNTH_CAP_INPUT};
static struct synth_info mpu_synth_info[MAX_MIDI_DEV];
/*
* States for the input scanner
*/
#define ST_INIT 0 /* Ready for timing byte or msg */
#define ST_TIMED 1 /* Leading timing byte rcvd */
#define ST_DATABYTE 2 /* Waiting for (nr_left) data bytes */
#define ST_SYSMSG 100 /* System message (sysx etc). */
#define ST_SYSEX 101 /* System exclusive msg */
#define ST_MTC 102 /* Midi Time Code (MTC) qframe msg */
#define ST_SONGSEL 103 /* Song select */
#define ST_SONGPOS 104 /* Song position pointer */
static unsigned char len_tab[] = /* # of data bytes following a status
*/
{
2, /* 8x */
2, /* 9x */
2, /* Ax */
2, /* Bx */
1, /* Cx */
1, /* Dx */
2, /* Ex */
0 /* Fx */
};
#define STORE(cmd) \
{ \
int len; \
unsigned char obuf[8]; \
cmd; \
seq_input_event(obuf, len); \
}
#define _seqbuf obuf
#define _seqbufptr 0
#define _SEQ_ADVBUF(x) len=x
static int
mpu_input_scanner (struct mpu_config *devc, unsigned char midic)
{
switch (devc->m_state)
{
case ST_INIT:
switch (midic)
{
case 0xf8:
/* Timer overflow */
break;
case 0xfc:
printk ("<all end>");
break;
case 0xfd:
if (devc->timer_flag)
mpu_timer_interrupt ();
break;
case 0xfe:
return MPU_ACK;
break;
case 0xf0:
case 0xf1:
case 0xf2:
case 0xf3:
case 0xf4:
case 0xf5:
case 0xf6:
case 0xf7:
printk ("<Trk data rq #%d>", midic & 0x0f);
break;
case 0xf9:
printk ("<conductor rq>");
break;
case 0xff:
devc->m_state = ST_SYSMSG;
break;
default:
if (midic <= 0xef)
{
/* printk("mpu time: %d ", midic); */
devc->m_state = ST_TIMED;
}
else
printk ("<MPU: Unknown event %02x> ", midic);
}
break;
case ST_TIMED:
{
int msg = (midic & 0xf0) >> 4;
devc->m_state = ST_DATABYTE;
if (msg < 8) /* Data byte */
{
/* printk("midi msg (running status) "); */
msg = (devc->last_status & 0xf0) >> 4;
msg -= 8;
devc->m_left = len_tab[msg] - 1;
devc->m_ptr = 2;
devc->m_buf[0] = devc->last_status;
devc->m_buf[1] = midic;
if (devc->m_left <= 0)
{
devc->m_state = ST_INIT;
do_midi_msg (devc->synthno, devc->m_buf, devc->m_ptr);
devc->m_ptr = 0;
}
}
else if (msg == 0xf) /* MPU MARK */
{
devc->m_state = ST_INIT;
switch (midic)
{
case 0xf8:
/* printk("NOP "); */
break;
case 0xf9:
/* printk("meas end "); */
break;
case 0xfc:
/* printk("data end "); */
break;
default:
printk ("Unknown MPU mark %02x\n", midic);
}
}
else
{
devc->last_status = midic;
/* printk ("midi msg "); */
msg -= 8;
devc->m_left = len_tab[msg];
devc->m_ptr = 1;
devc->m_buf[0] = midic;
if (devc->m_left <= 0)
{
devc->m_state = ST_INIT;
do_midi_msg (devc->synthno, devc->m_buf, devc->m_ptr);
devc->m_ptr = 0;
}
}
}
break;
case ST_SYSMSG:
switch (midic)
{
case 0xf0:
printk ("<SYX>");
devc->m_state = ST_SYSEX;
break;
case 0xf1:
devc->m_state = ST_MTC;
break;
case 0xf2:
devc->m_state = ST_SONGPOS;
devc->m_ptr = 0;
break;
case 0xf3:
devc->m_state = ST_SONGSEL;
break;
case 0xf6:
/* printk("tune_request\n"); */
devc->m_state = ST_INIT;
/*
* Real time messages
*/
case 0xf8:
/* midi clock */
devc->m_state = ST_INIT;
timer_ext_event (devc, TMR_CLOCK, 0);
break;
case 0xfA:
devc->m_state = ST_INIT;
timer_ext_event (devc, TMR_START, 0);
break;
case 0xFB:
devc->m_state = ST_INIT;
timer_ext_event (devc, TMR_CONTINUE, 0);
break;
case 0xFC:
devc->m_state = ST_INIT;
timer_ext_event (devc, TMR_STOP, 0);
break;
case 0xFE:
/* active sensing */
devc->m_state = ST_INIT;
break;
case 0xff:
/* printk("midi hard reset"); */
devc->m_state = ST_INIT;
break;
default:
printk ("unknown MIDI sysmsg %0x\n", midic);
devc->m_state = ST_INIT;
}
break;
case ST_MTC:
devc->m_state = ST_INIT;
printk ("MTC frame %x02\n", midic);
break;
case ST_SYSEX:
if (midic == 0xf7)
{
printk ("<EOX>");
devc->m_state = ST_INIT;
}
else
printk ("%02x ", midic);
break;
case ST_SONGPOS:
BUFTEST (devc);
devc->m_buf[devc->m_ptr++] = midic;
if (devc->m_ptr == 2)
{
devc->m_state = ST_INIT;
devc->m_ptr = 0;
timer_ext_event (devc, TMR_SPP,
((devc->m_buf[1] & 0x7f) << 7) |
(devc->m_buf[0] & 0x7f));
}
break;
case ST_DATABYTE:
BUFTEST (devc);
devc->m_buf[devc->m_ptr++] = midic;
if ((--devc->m_left) <= 0)
{
devc->m_state = ST_INIT;
do_midi_msg (devc->synthno, devc->m_buf, devc->m_ptr);
devc->m_ptr = 0;
}
break;
default:
printk ("Bad state %d ", devc->m_state);
devc->m_state = ST_INIT;
}
return 1;
}
static void
mpu401_input_loop (struct mpu_config *devc)
{
unsigned long flags;
int busy;
int n;
DISABLE_INTR (flags);
busy = devc->m_busy;
devc->m_busy = 1;
RESTORE_INTR (flags);
if (busy) /* Already inside the scanner */
return;
n = 50;
while (input_avail (devc->base) && n-- > 0)
{
unsigned char c = read_data (devc->base);
if (devc->mode == MODE_SYNTH)
{
mpu_input_scanner (devc, c);
}
else if (devc->opened & OPEN_READ && devc->inputintr != NULL)
devc->inputintr (devc->devno, c);
}
devc->m_busy = 0;
}
void
mpuintr (INT_HANDLER_PARMS (irq, dummy))
{
struct mpu_config *devc;
int dev;
#ifdef linux
sti ();
#endif
if (irq < 1 || irq > 15)
{
printk ("MPU-401: Interrupt #%d?\n", irq);
return;
}
dev = irq2dev[irq];
if (dev == -1)
{
/* printk ("MPU-401: Interrupt #%d?\n", irq); */
return;
}
devc = &dev_conf[dev];
if (input_avail (devc->base))
if (devc->base != 0 && (devc->opened & OPEN_READ || devc->mode == MODE_SYNTH))
mpu401_input_loop (devc);
else
{
/* Dummy read (just to acknowledge the interrupt) */
read_data (devc->base);
}
}
static int
mpu401_open (int dev, int mode,
void (*input) (int dev, unsigned char data),
void (*output) (int dev)
)
{
int err;
struct mpu_config *devc;
if (dev < 0 || dev >= num_midis)
return RET_ERROR (ENXIO);
devc = &dev_conf[dev];
if (devc->opened)
{
printk ("MPU-401: Midi busy\n");
return RET_ERROR (EBUSY);
}
/*
* Verify that the device is really running.
* Some devices (such as Ensoniq SoundScape don't
* work before the on board processor (OBP) is initialized
* by downloadin it's microcode.
*/
if (!devc->initialized)
{
if (mpu401_status (devc->base) == 0xff) /* Bus float */
{
printk ("MPU-401: Device not initialized properly\n");
return RET_ERROR (EIO);
}
reset_mpu401 (devc);
}
irq2dev[devc->irq] = dev;
if (devc->shared_irq == 0)
if ((err = snd_set_irq_handler (devc->irq, mpuintr, midi_devs[dev]->info.name) < 0))
{
return err;
}
if (midi_devs[dev]->coproc)
if ((err = midi_devs[dev]->coproc->
open (midi_devs[dev]->coproc->devc, COPR_MIDI)) < 0)
{
if (devc->shared_irq == 0)
snd_release_irq (devc->irq);
printk ("MPU-401: Can't access coprocessor device\n");
return err;
}
set_uart_mode (dev, devc, 1);
devc->mode = MODE_MIDI;
devc->synthno = 0;
mpu401_input_loop (devc);
devc->inputintr = input;
devc->opened = mode;
return 0;
}
static void
mpu401_close (int dev)
{
struct mpu_config *devc;
devc = &dev_conf[dev];
if (devc->uart_mode)
reset_mpu401 (devc); /*
* This disables the UART mode
*/
devc->mode = 0;
if (devc->shared_irq == 0)
snd_release_irq (devc->irq);
devc->inputintr = NULL;
if (midi_devs[dev]->coproc)
midi_devs[dev]->coproc->close (midi_devs[dev]->coproc->devc, COPR_MIDI);
devc->opened = 0;
}
static int
mpu401_out (int dev, unsigned char midi_byte)
{
int timeout;
unsigned long flags;
struct mpu_config *devc;
devc = &dev_conf[dev];
#if 0
/*
* Test for input since pending input seems to block the output.
*/
if (input_avail (devc->base))
{
mpu401_input_loop (devc);
}
#endif
/*
* Sometimes it takes about 13000 loops before the output becomes ready
* (After reset). Normally it takes just about 10 loops.
*/
for (timeout = 3000; timeout > 0 && !output_ready (devc->base); timeout--);
DISABLE_INTR (flags);
if (!output_ready (devc->base))
{
printk ("MPU-401: Send data timeout\n");
RESTORE_INTR (flags);
return 0;
}
write_data (devc->base, midi_byte);
RESTORE_INTR (flags);
return 1;
}
static int
mpu401_command (int dev, mpu_command_rec * cmd)
{
int i, timeout, ok;
int ret = 0;
unsigned long flags;
struct mpu_config *devc;
devc = &dev_conf[dev];
if (devc->uart_mode) /*
* Not possible in UART mode
*/
{
printk ("MPU-401 commands not possible in the UART mode\n");
return RET_ERROR (EINVAL);
}
/*
* Test for input since pending input seems to block the output.
*/
if (input_avail (devc->base))
mpu401_input_loop (devc);
/*
* Sometimes it takes about 30000 loops before the output becomes ready
* (After reset). Normally it takes just about 10 loops.
*/
timeout = 30000;
retry:
if (timeout-- <= 0)
{
printk ("MPU-401: Command (0x%x) timeout\n", (int) cmd->cmd);
return RET_ERROR (EIO);
}
DISABLE_INTR (flags);
if (!output_ready (devc->base))
{
RESTORE_INTR (flags);
goto retry;
}
write_command (devc->base, cmd->cmd);
ok = 0;
for (timeout = 50000; timeout > 0 && !ok; timeout--)
if (input_avail (devc->base))
{
if (mpu_input_scanner (devc, read_data (devc->base)) == MPU_ACK)
ok = 1;
}
if (!ok)
{
RESTORE_INTR (flags);
/* printk ("MPU: No ACK to command (0x%x)\n", (int) cmd->cmd); */
return RET_ERROR (EIO);
}
if (cmd->nr_args)
for (i = 0; i < cmd->nr_args; i++)
{
for (timeout = 3000; timeout > 0 && !output_ready (devc->base); timeout--);
if (!mpu401_out (dev, cmd->data[i]))
{
RESTORE_INTR (flags);
printk ("MPU: Command (0x%x), parm send failed.\n", (int) cmd->cmd);
return RET_ERROR (EIO);
}
}
ret = 0;
cmd->data[0] = 0;
if (cmd->nr_returns)
for (i = 0; i < cmd->nr_returns; i++)
{
ok = 0;
for (timeout = 5000; timeout > 0 && !ok; timeout--)
if (input_avail (devc->base))
{
cmd->data[i] = read_data (devc->base);
ok = 1;
}
if (!ok)
{
RESTORE_INTR (flags);
/* printk ("MPU: No response(%d) to command (0x%x)\n", i, (int) cmd->cmd); */
return RET_ERROR (EIO);
}
}
RESTORE_INTR (flags);
return ret;
}
static int
exec_cmd (int dev, int cmd, int data)
{
int ret;
static mpu_command_rec rec;
rec.cmd = cmd & 0xff;
rec.nr_args = ((cmd & 0xf0) == 0xE0);
rec.nr_returns = ((cmd & 0xf0) == 0xA0);
rec.data[0] = data & 0xff;
if ((ret = mpu401_command (dev, &rec)) < 0)
return ret;
return (unsigned char) rec.data[0];
}
static int
mpu401_prefix_cmd (int dev, unsigned char status)
{
struct mpu_config *devc = &dev_conf[dev];
if (devc->uart_mode)
return 1;
if (status < 0xf0)
{
if (exec_cmd (dev, 0xD0, 0) < 0)
return 0;
return 1;
}
switch (status)
{
case 0xF0:
if (exec_cmd (dev, 0xDF, 0) < 0)
return 0;
return 1;
break;
default:
return 0;
}
return 0;
}
static int
mpu401_start_read (int dev)
{
return 0;
}
static int
mpu401_end_read (int dev)
{
return 0;
}
static int
mpu401_ioctl (int dev, unsigned cmd, unsigned arg)
{
struct mpu_config *devc;
devc = &dev_conf[dev];
switch (cmd)
{
case 1:
IOCTL_FROM_USER ((char *) &init_sequence, (char *) arg, 0, sizeof (init_sequence));
return 0;
break;
case SNDCTL_MIDI_MPUMODE:
if (devc->version == 0)
{
printk ("MPU-401: Intelligent mode not supported by the HW\n");
return RET_ERROR (EINVAL);
}
set_uart_mode (dev, devc, !IOCTL_IN (arg));
return 0;
break;
case SNDCTL_MIDI_MPUCMD:
{
int ret;
mpu_command_rec rec;
IOCTL_FROM_USER ((char *) &rec, (char *) arg, 0, sizeof (rec));
if ((ret = mpu401_command (dev, &rec)) < 0)
return ret;
IOCTL_TO_USER ((char *) arg, 0, (char *) &rec, sizeof (rec));
return 0;
}
break;
default:
return RET_ERROR (EINVAL);
}
}
static void
mpu401_kick (int dev)
{
}
static int
mpu401_buffer_status (int dev)
{
return 0; /*
* No data in buffers
*/
}
static int
mpu_synth_ioctl (int dev,
unsigned int cmd, unsigned int arg)
{
int midi_dev;
struct mpu_config *devc;
midi_dev = synth_devs[dev]->midi_dev;
if (midi_dev < 0 || midi_dev > num_midis)
return RET_ERROR (ENXIO);
devc = &dev_conf[midi_dev];
switch (cmd)
{
case SNDCTL_SYNTH_INFO:
IOCTL_TO_USER ((char *) arg, 0, &mpu_synth_info[midi_dev],
sizeof (struct synth_info));
return 0;
break;
case SNDCTL_SYNTH_MEMAVL:
return 0x7fffffff;
break;
default:
return RET_ERROR (EINVAL);
}
}
static int
mpu_synth_open (int dev, int mode)
{
int midi_dev, err;
struct mpu_config *devc;
midi_dev = synth_devs[dev]->midi_dev;
if (midi_dev < 0 || midi_dev > num_midis)
{
return RET_ERROR (ENXIO);
}
devc = &dev_conf[midi_dev];
/*
* Verify that the device is really running.
* Some devices (such as Ensoniq SoundScape don't
* work before the on board processor (OBP) is initialized
* by downloadin it's microcode.
*/
if (!devc->initialized)
{
if (mpu401_status (devc->base) == 0xff) /* Bus float */
{
printk ("MPU-401: Device not initialized properly\n");
return RET_ERROR (EIO);
}
reset_mpu401 (devc);
}
if (devc->opened)
{
printk ("MPU-401: Midi busy\n");
return RET_ERROR (EBUSY);
}
devc->mode = MODE_SYNTH;
devc->synthno = dev;
devc->inputintr = NULL;
irq2dev[devc->irq] = midi_dev;
if (devc->shared_irq == 0)
if ((err = snd_set_irq_handler (devc->irq, mpuintr, midi_devs[midi_dev]->info.name) < 0))
{
return err;
}
if (midi_devs[midi_dev]->coproc)
if ((err = midi_devs[midi_dev]->coproc->
open (midi_devs[midi_dev]->coproc->devc, COPR_MIDI)) < 0)
{
if (devc->shared_irq == 0)
snd_release_irq (devc->irq);
printk ("MPU-401: Can't access coprocessor device\n");
return err;
}
devc->opened = mode;
reset_mpu401 (devc);
if (mode & OPEN_READ)
{
exec_cmd (midi_dev, 0x8B, 0); /* Enable data in stop mode */
exec_cmd (midi_dev, 0x34, 0); /* Return timing bytes in stop mode */
}
return 0;
}
static void
mpu_synth_close (int dev)
{
int midi_dev;
struct mpu_config *devc;
midi_dev = synth_devs[dev]->midi_dev;
devc = &dev_conf[midi_dev];
exec_cmd (midi_dev, 0x15, 0); /* Stop recording, playback and MIDI */
exec_cmd (midi_dev, 0x8a, 0); /* Disable data in stopped mode */
if (devc->shared_irq == 0)
snd_release_irq (devc->irq);
devc->inputintr = NULL;
if (midi_devs[midi_dev]->coproc)
midi_devs[midi_dev]->coproc->close (midi_devs[midi_dev]->coproc->devc, COPR_MIDI);
devc->opened = 0;
devc->mode = 0;
}
#define MIDI_SYNTH_NAME "MPU-401 UART Midi"
#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
#include "midi_synth.h"
static struct synth_operations mpu401_synth_proto =
{
NULL,
0,
SYNTH_TYPE_MIDI,
0,
mpu_synth_open,
mpu_synth_close,
mpu_synth_ioctl,
midi_synth_kill_note,
midi_synth_start_note,
midi_synth_set_instr,
midi_synth_reset,
midi_synth_hw_control,
midi_synth_load_patch,
midi_synth_aftertouch,
midi_synth_controller,
midi_synth_panning,
NULL,
midi_synth_patchmgr,
midi_synth_bender,
NULL, /* alloc */
midi_synth_setup_voice
};
static struct synth_operations mpu401_synth_operations[MAX_MIDI_DEV];
static struct midi_operations mpu401_midi_proto =
{
{"MPU-401 Midi", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
NULL,
{0},
mpu401_open,
mpu401_close,
mpu401_ioctl,
mpu401_out,
mpu401_start_read,
mpu401_end_read,
mpu401_kick,
NULL,
mpu401_buffer_status,
mpu401_prefix_cmd
};
static struct midi_operations mpu401_midi_operations[MAX_MIDI_DEV];
static void
mpu401_chk_version (struct mpu_config *devc)
{
int tmp;
devc->version = devc->revision = 0;
if ((tmp = exec_cmd (num_midis, 0xAC, 0)) < 0)
return;
if ((tmp & 0xf0) > 0x20) /* Why it's larger than 2.x ??? */
return;
devc->version = tmp;
if ((tmp = exec_cmd (num_midis, 0xAD, 0)) < 0)
{
devc->version = 0;
return;
}
devc->revision = tmp;
}
long
attach_mpu401 (long mem_start, struct address_info *hw_config)
{
unsigned long flags;
char revision_char;
struct mpu_config *devc;
if (num_midis >= MAX_MIDI_DEV)
{
printk ("MPU-401: Too many midi devices detected\n");
return mem_start;
}
devc = &dev_conf[num_midis];
devc->base = hw_config->io_base;
devc->irq = hw_config->irq;
devc->opened = 0;
devc->uart_mode = 0;
devc->initialized = 0;
devc->version = 0;
devc->revision = 0;
devc->capabilities = 0;
devc->timer_flag = 0;
devc->m_busy = 0;
devc->m_state = ST_INIT;
devc->shared_irq = hw_config->always_detect;
if (!hw_config->always_detect)
{
/* Verify the hardware again */
if (!reset_mpu401 (devc))
return mem_start;
DISABLE_INTR (flags);
mpu401_chk_version (devc);
if (devc->version == 0)
mpu401_chk_version (devc);
RESTORE_INTR (flags);
}
if (devc->version == 0)
{
memcpy ((char *) &mpu401_synth_operations[num_midis],
(char *) &std_midi_synth,
sizeof (struct synth_operations));
}
else
{
devc->capabilities |= MPU_CAP_INTLG; /* Supports intelligent mode */
memcpy ((char *) &mpu401_synth_operations[num_midis],
(char *) &mpu401_synth_proto,
sizeof (struct synth_operations));
}
memcpy ((char *) &mpu401_midi_operations[num_midis],
(char *) &mpu401_midi_proto,
sizeof (struct midi_operations));
mpu401_midi_operations[num_midis].converter =
&mpu401_synth_operations[num_midis];
memcpy ((char *) &mpu_synth_info[num_midis],
(char *) &mpu_synth_info_proto,
sizeof (struct synth_info));
n_mpu_devs++;
if (devc->version == 0x20 && devc->revision >= 0x07) /* MusicQuest interface */
{
int ports = (devc->revision & 0x08) ? 32 : 16;
devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_SMPTE |
MPU_CAP_CLS | MPU_CAP_2PORT;
revision_char = (devc->revision == 0x7f) ? 'M' : ' ';
#if defined(__FreeBSD__)
printk ("mpu0: <MQX-%d%c MIDI Interface>",
#else
printk (" <MQX-%d%c MIDI Interface>",
#endif
ports,
revision_char);
sprintf (mpu_synth_info[num_midis].name,
"MQX-%d%c MIDI Interface #%d",
ports,
revision_char,
n_mpu_devs);
}
else
{
revision_char = devc->revision ? devc->revision + '@' : ' ';
if (devc->revision > ('Z' - '@'))
revision_char = '+';
devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_FSK;
#if defined(__FreeBSD__)
printk ("mpu0: <MPU-401 MIDI Interface %d.%d%c>",
#else
printk (" <MPU-401 MIDI Interface %d.%d%c>",
#endif
(devc->version & 0xf0) >> 4,
devc->version & 0x0f,
revision_char);
sprintf (mpu_synth_info[num_midis].name,
"MPU-401 %d.%d%c Midi interface #%d",
(devc->version & 0xf0) >> 4,
devc->version & 0x0f,
revision_char,
n_mpu_devs);
}
strcpy (mpu401_midi_operations[num_midis].info.name,
mpu_synth_info[num_midis].name);
mpu401_synth_operations[num_midis].midi_dev = devc->devno = num_midis;
mpu401_synth_operations[devc->devno].info =
&mpu_synth_info[devc->devno];
if (devc->capabilities & MPU_CAP_INTLG) /* Has timer */
mpu_timer_init (num_midis);
irq2dev[devc->irq] = num_midis;
midi_devs[num_midis++] = &mpu401_midi_operations[devc->devno];
return mem_start;
}
static int
reset_mpu401 (struct mpu_config *devc)
{
unsigned long flags;
int ok, timeout, n;
int timeout_limit;
/*
* Send the RESET command. Try again if no success at the first time.
* (If the device is in the UART mode, it will not ack the reset cmd).
*/
ok = 0;
timeout_limit = devc->initialized ? 30000 : 100000;
devc->initialized = 1;
for (n = 0; n < 2 && !ok; n++)
{
for (timeout = timeout_limit; timeout > 0 && !ok; timeout--)
ok = output_ready (devc->base);
write_command (devc->base, MPU_RESET); /*
* Send MPU-401 RESET Command
*/
/*
* Wait at least 25 msec. This method is not accurate so let's make the
* loop bit longer. Cannot sleep since this is called during boot.
*/
for (timeout = timeout_limit * 2; timeout > 0 && !ok; timeout--)
{
DISABLE_INTR (flags);
if (input_avail (devc->base))
if (read_data (devc->base) == MPU_ACK)
ok = 1;
RESTORE_INTR (flags);
}
}
devc->m_state = ST_INIT;
devc->m_ptr = 0;
devc->m_left = 0;
devc->last_status = 0;
devc->uart_mode = 0;
return ok;
}
static void
set_uart_mode (int dev, struct mpu_config *devc, int arg)
{
if (!arg && devc->version == 0)
{
return;
}
if ((devc->uart_mode == 0) == (arg == 0))
{
return; /* Already set */
}
reset_mpu401 (devc); /* This exits the uart mode */
if (arg)
{
if (exec_cmd (dev, UART_MODE_ON, 0) < 0)
{
printk ("MPU%d: Can't enter UART mode\n", devc->devno);
devc->uart_mode = 0;
return;
}
}
devc->uart_mode = arg;
}
int
probe_mpu401 (struct address_info *hw_config)
{
int ok = 0;
struct mpu_config tmp_devc;
tmp_devc.base = hw_config->io_base;
tmp_devc.irq = hw_config->irq;
tmp_devc.initialized = 0;
#if !defined(EXCLUDE_AEDSP16) && defined(AEDSP16_MPU401)
/*
* Initialize Audio Excel DSP 16 to MPU-401, before any operation.
*/
InitAEDSP16_MPU401 (hw_config);
#endif
if (hw_config->always_detect)
return 1;
if (INB (hw_config->io_base + 1) == 0xff)
return 0; /* Just bus float? */
ok = reset_mpu401 (&tmp_devc);
return ok;
}
/*****************************************************
* Timer stuff
****************************************************/
#if !defined(EXCLUDE_SEQUENCER)
static volatile int timer_initialized = 0, timer_open = 0, tmr_running = 0;
static volatile int curr_tempo, curr_timebase, hw_timebase;
static int max_timebase = 8; /* 8*24=192 ppqn */
static volatile unsigned long next_event_time;
static volatile unsigned long curr_ticks, curr_clocks;
static unsigned long prev_event_time;
static int metronome_mode;
static unsigned long
clocks2ticks (unsigned long clocks)
{
/*
* The MPU-401 supports just a limited set of possible timebase values.
* Since the applications require more choices, the driver has to
* program the HW to do it's best and to convert between the HW and
* actual timebases.
*/
return ((clocks * curr_timebase) + (hw_timebase / 2)) / hw_timebase;
}
static void
set_timebase (int midi_dev, int val)
{
int hw_val;
if (val < 48)
val = 48;
if (val > 1000)
val = 1000;
hw_val = val;
hw_val = (hw_val + 23) / 24;
if (hw_val > max_timebase)
hw_val = max_timebase;
if (exec_cmd (midi_dev, 0xC0 | (hw_val & 0x0f), 0) < 0)
{
printk ("MPU: Can't set HW timebase to %d\n", hw_val * 24);
return;
}
hw_timebase = hw_val * 24;
curr_timebase = val;
}
static void
tmr_reset (void)
{
unsigned long flags;
DISABLE_INTR (flags);
next_event_time = 0xffffffff;
prev_event_time = 0;
curr_ticks = curr_clocks = 0;
RESTORE_INTR (flags);
}
static void
set_timer_mode (int midi_dev)
{
if (timer_mode & TMR_MODE_CLS)
exec_cmd (midi_dev, 0x3c, 0); /* Use CLS sync */
else if (timer_mode & TMR_MODE_SMPTE)
exec_cmd (midi_dev, 0x3d, 0); /* Use SMPTE sync */
if (timer_mode & TMR_INTERNAL)
{
exec_cmd (midi_dev, 0x80, 0); /* Use MIDI sync */
}
else
{
if (timer_mode & (TMR_MODE_MIDI | TMR_MODE_CLS))
{
exec_cmd (midi_dev, 0x82, 0); /* Use MIDI sync */
exec_cmd (midi_dev, 0x91, 0); /* Enable ext MIDI ctrl */
}
else if (timer_mode & TMR_MODE_FSK)
exec_cmd (midi_dev, 0x81, 0); /* Use FSK sync */
}
}
static void
stop_metronome (int midi_dev)
{
exec_cmd (midi_dev, 0x84, 0); /* Disable metronome */
}
static void
setup_metronome (int midi_dev)
{
int numerator, denominator;
int clks_per_click, num_32nds_per_beat;
int beats_per_measure;
numerator = ((unsigned) metronome_mode >> 24) & 0xff;
denominator = ((unsigned) metronome_mode >> 16) & 0xff;
clks_per_click = ((unsigned) metronome_mode >> 8) & 0xff;
num_32nds_per_beat = (unsigned) metronome_mode & 0xff;
beats_per_measure = (numerator * 4) >> denominator;
if (!metronome_mode)
exec_cmd (midi_dev, 0x84, 0); /* Disable metronome */
else
{
exec_cmd (midi_dev, 0xE4, clks_per_click);
exec_cmd (midi_dev, 0xE6, beats_per_measure);
exec_cmd (midi_dev, 0x83, 0); /* Enable metronome without accents */
}
}
static int
start_timer (int midi_dev)
{
tmr_reset ();
set_timer_mode (midi_dev);
if (tmr_running)
return TIMER_NOT_ARMED; /* Already running */
if (timer_mode & TMR_INTERNAL)
{
exec_cmd (midi_dev, 0x02, 0); /* Send MIDI start */
tmr_running = 1;
return TIMER_NOT_ARMED;
}
else
{
exec_cmd (midi_dev, 0x35, 0); /* Enable mode messages to PC */
exec_cmd (midi_dev, 0x38, 0); /* Enable sys common messages to PC */
exec_cmd (midi_dev, 0x39, 0); /* Enable real time messages to PC */
exec_cmd (midi_dev, 0x97, 0); /* Enable system exclusive messages to PC */
}
return TIMER_ARMED;
}
static int
mpu_timer_open (int dev, int mode)
{
int midi_dev = sound_timer_devs[dev]->devlink;
if (timer_open)
return RET_ERROR (EBUSY);
tmr_reset ();
curr_tempo = 50;
exec_cmd (midi_dev, 0xE0, 50);
curr_timebase = hw_timebase = 120;
set_timebase (midi_dev, 120);
timer_open = 1;
metronome_mode = 0;
set_timer_mode (midi_dev);
exec_cmd (midi_dev, 0xe7, 0x04); /* Send all clocks to host */
exec_cmd (midi_dev, 0x95, 0); /* Enable clock to host */
return 0;
}
static void
mpu_timer_close (int dev)
{
int midi_dev = sound_timer_devs[dev]->devlink;
timer_open = tmr_running = 0;
exec_cmd (midi_dev, 0x15, 0); /* Stop all */
exec_cmd (midi_dev, 0x94, 0); /* Disable clock to host */
exec_cmd (midi_dev, 0x8c, 0); /* Disable measure end messages to host */
stop_metronome (midi_dev);
}
static int
mpu_timer_event (int dev, unsigned char *event)
{
unsigned char command = event[1];
unsigned long parm = *(unsigned int *) &event[4];
int midi_dev = sound_timer_devs[dev]->devlink;
switch (command)
{
case TMR_WAIT_REL:
parm += prev_event_time;
case TMR_WAIT_ABS:
if (parm > 0)
{
long time;
if (parm <= curr_ticks) /* It's the time */
return TIMER_NOT_ARMED;
time = parm;
next_event_time = prev_event_time = time;
return TIMER_ARMED;
}
break;
case TMR_START:
if (tmr_running)
break;
return start_timer (midi_dev);
break;
case TMR_STOP:
exec_cmd (midi_dev, 0x01, 0); /* Send MIDI stop */
stop_metronome (midi_dev);
tmr_running = 0;
break;
case TMR_CONTINUE:
if (tmr_running)
break;
exec_cmd (midi_dev, 0x03, 0); /* Send MIDI continue */
setup_metronome (midi_dev);
tmr_running = 1;
break;
case TMR_TEMPO:
if (parm)
{
if (parm < 8)
parm = 8;
if (parm > 250)
parm = 250;
if (exec_cmd (midi_dev, 0xE0, parm) < 0)
printk ("MPU: Can't set tempo to %d\n", (int) parm);
curr_tempo = parm;
}
break;
case TMR_ECHO:
seq_copy_to_input (event, 8);
break;
case TMR_TIMESIG:
if (metronome_mode) /* Metronome enabled */
{
metronome_mode = parm;
setup_metronome (midi_dev);
}
break;
default:;
}
return TIMER_NOT_ARMED;
}
static unsigned long
mpu_timer_get_time (int dev)
{
if (!timer_open)
return 0;
return curr_ticks;
}
static int
mpu_timer_ioctl (int dev,
unsigned int command, unsigned int arg)
{
int midi_dev = sound_timer_devs[dev]->devlink;
switch (command)
{
case SNDCTL_TMR_SOURCE:
{
int parm = IOCTL_IN (arg) & timer_caps;
if (parm != 0)
{
timer_mode = parm;
if (timer_mode & TMR_MODE_CLS)
exec_cmd (midi_dev, 0x3c, 0); /* Use CLS sync */
else if (timer_mode & TMR_MODE_SMPTE)
exec_cmd (midi_dev, 0x3d, 0); /* Use SMPTE sync */
}
return IOCTL_OUT (arg, timer_mode);
}
break;
case SNDCTL_TMR_START:
start_timer (midi_dev);
return 0;
break;
case SNDCTL_TMR_STOP:
tmr_running = 0;
exec_cmd (midi_dev, 0x01, 0); /* Send MIDI stop */
stop_metronome (midi_dev);
return 0;
break;
case SNDCTL_TMR_CONTINUE:
if (tmr_running)
return 0;
tmr_running = 1;
exec_cmd (midi_dev, 0x03, 0); /* Send MIDI continue */
return 0;
break;
case SNDCTL_TMR_TIMEBASE:
{
int val = IOCTL_IN (arg);
if (val)
set_timebase (midi_dev, val);
return IOCTL_OUT (arg, curr_timebase);
}
break;
case SNDCTL_TMR_TEMPO:
{
int val = IOCTL_IN (arg);
int ret;
if (val)
{
if (val < 8)
val = 8;
if (val > 250)
val = 250;
if ((ret = exec_cmd (midi_dev, 0xE0, val)) < 0)
{
printk ("MPU: Can't set tempo to %d\n", (int) val);
return ret;
}
curr_tempo = val;
}
return IOCTL_OUT (arg, curr_tempo);
}
break;
case SNDCTL_SEQ_CTRLRATE:
if (IOCTL_IN (arg) != 0) /* Can't change */
return RET_ERROR (EINVAL);
return IOCTL_OUT (arg, ((curr_tempo * curr_timebase) + 30) / 60);
break;
case SNDCTL_TMR_METRONOME:
metronome_mode = IOCTL_IN (arg);
setup_metronome (midi_dev);
return 0;
break;
default:
}
return RET_ERROR (EINVAL);
}
static void
mpu_timer_arm (int dev, long time)
{
if (time < 0)
time = curr_ticks + 1;
else if (time <= curr_ticks) /* It's the time */
return;
next_event_time = prev_event_time = time;
return;
}
static struct sound_timer_operations mpu_timer =
{
{"MPU-401 Timer", 0},
10, /* Priority */
0, /* Local device link */
mpu_timer_open,
mpu_timer_close,
mpu_timer_event,
mpu_timer_get_time,
mpu_timer_ioctl,
mpu_timer_arm
};
static void
mpu_timer_interrupt (void)
{
if (!timer_open)
return;
if (!tmr_running)
return;
curr_clocks++;
curr_ticks = clocks2ticks (curr_clocks);
if (curr_ticks >= next_event_time)
{
next_event_time = 0xffffffff;
sequencer_timer ();
}
}
static void
timer_ext_event (struct mpu_config *devc, int event, int parm)
{
int midi_dev = devc->devno;
if (!devc->timer_flag)
return;
switch (event)
{
case TMR_CLOCK:
printk ("<MIDI clk>");
break;
case TMR_START:
printk ("Ext MIDI start\n");
if (!tmr_running)
if (timer_mode & TMR_EXTERNAL)
{
tmr_running = 1;
setup_metronome (midi_dev);
next_event_time = 0;
STORE (SEQ_START_TIMER ());
}
break;
case TMR_STOP:
printk ("Ext MIDI stop\n");
if (timer_mode & TMR_EXTERNAL)
{
tmr_running = 0;
stop_metronome (midi_dev);
STORE (SEQ_STOP_TIMER ());
}
break;
case TMR_CONTINUE:
printk ("Ext MIDI continue\n");
if (timer_mode & TMR_EXTERNAL)
{
tmr_running = 1;
setup_metronome (midi_dev);
STORE (SEQ_CONTINUE_TIMER ());
}
break;
case TMR_SPP:
printk ("Songpos: %d\n", parm);
if (timer_mode & TMR_EXTERNAL)
{
STORE (SEQ_SONGPOS (parm));
}
break;
}
}
static void
mpu_timer_init (int midi_dev)
{
struct mpu_config *devc;
int n;
devc = &dev_conf[midi_dev];
if (timer_initialized)
return; /* There is already a similar timer */
timer_initialized = 1;
mpu_timer.devlink = midi_dev;
dev_conf[midi_dev].timer_flag = 1;
#if 1
if (num_sound_timers >= MAX_TIMER_DEV)
n = 0; /* Overwrite the system timer */
else
n = num_sound_timers++;
#else
n = 0;
#endif
sound_timer_devs[n] = &mpu_timer;
if (devc->version < 0x20) /* Original MPU-401 */
timer_caps = TMR_INTERNAL | TMR_EXTERNAL | TMR_MODE_FSK | TMR_MODE_MIDI;
else
{
/*
* The version number 2.0 is used (at least) by the
* MusicQuest cards and the Roland Super-MPU.
*
* MusicQuest has given a special meaning to the bits of the
* revision number. The Super-MPU returns 0.
*/
if (devc->revision)
timer_caps |= TMR_EXTERNAL | TMR_MODE_MIDI;
if (devc->revision & 0x02)
timer_caps |= TMR_MODE_CLS;
#if 0
if (devc->revision & 0x04)
timer_caps |= TMR_MODE_SMPTE;
#endif
if (devc->revision & 0x40)
max_timebase = 10; /* Has the 216 and 240 ppqn modes */
}
timer_mode = (TMR_INTERNAL | TMR_MODE_MIDI) & timer_caps;
}
#endif
#endif
#endif
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