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ca83dc2de1
freebsd-dev/sys/i386/isa/sound/mpu401.c
Jordan K. Hubbard ca83dc2de1 Upgrade the sound drivers to VoxWare pre-3.0 and fix a number of bugs. 
Make the sound configuration a little neater
	(see /sys/i386/isa/sound/Readme.freebsd)
Add support for the Microsoft Sound Source.
Document the sound options again.
Submitted by:	Sujal Patel <smpatel@wam.umd.edu>
Obtained from:	Voxware
1995-03-04 21:11:21 +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.
*
*/
#define USE_SEQ_MACROS
#define USE_SIMPLE_MACROS
#include "sound_config.h"
#ifdef CONFIGURE_SOUNDCARD
#if !defined(EXCLUDE_MPU401) && !defined(EXCLUDE_MIDI)
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);
unsigned short controls[32];
};
#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];
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) \
if (devc->opened & OPEN_READ) \
{ \
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 void
do_midi_msg (struct mpu_config *devc, unsigned char *msg, int mlen)
{
switch (msg[0] & 0xf0)
{
case 0x90:
if (msg[2] != 0)
{
STORE (SEQ_START_NOTE (devc->synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
}
msg[2] = 64;
case 0x80:
STORE (SEQ_STOP_NOTE (devc->synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
case 0xA0:
STORE (SEQ_KEY_PRESSURE (devc->synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
case 0xB0:
/*
* Fix the controller value (combine MSB and LSB)
*/
if (msg[1] < 64)
{
int ctrl = msg[1];
if (ctrl < 32)
{
devc->controls[ctrl] = (msg[2] & 0x7f) << 7;
}
else
{
ctrl -= 32;
devc->controls[ctrl] =
(devc->controls[ctrl] & ~0x7f) | (msg[2] & 0x7f);
}
STORE (SEQ_CONTROL (devc->synthno, msg[0] & 0x0f,
msg[1], devc->controls[ctrl]));
}
else
STORE (SEQ_CONTROL (devc->synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
case 0xC0:
STORE (SEQ_SET_PATCH (devc->synthno, msg[0] & 0x0f, msg[1]));
break;
case 0xD0:
STORE (SEQ_CHN_PRESSURE (devc->synthno, msg[0] & 0x0f, msg[1]));
break;
case 0xE0:
STORE (SEQ_BENDER (devc->synthno, msg[0] & 0x0f,
(msg[1] % 0x7f) | ((msg[2] & 0x7f) << 7)));
break;
default:
printk ("MPU: Unknown midi channel message %02x\n", msg[0]);
}
}
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, 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, 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, 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;
DISABLE_INTR (flags);
busy = devc->m_busy;
devc->m_busy = 1;
RESTORE_INTR (flags);
if (busy)
return;
while (input_avail (devc->base))
{
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 irq)
{
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 (devc->base != 0 && (devc->opened & OPEN_READ || devc->mode == MODE_SYNTH))
if (input_avail (devc->base))
mpu401_input_loop (devc);
}
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);
}
irq2dev[devc->irq] = dev;
if ((err = snd_set_irq_handler (devc->irq, mpuintr) < 0))
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;
snd_release_irq (devc->irq);
devc->inputintr = NULL;
irq2dev[devc->irq] = -1;
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 = 30000; timeout > 0 && !output_ready (devc->base); timeout--); /*
* Wait
*/
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.
*/
for (timeout = 500000; timeout > 0 && !output_ready (devc->base); timeout--);
DISABLE_INTR (flags);
if (!output_ready (devc->base))
{
printk ("MPU-401: Command (0x%x) timeout\n", (int) cmd->cmd);
RESTORE_INTR (flags);
return RET_ERROR (EIO);
}
write_command (devc->base, cmd->cmd);
ok = 0;
for (timeout = 500000; 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 = 30000; 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];
if (devc->opened)
{
printk ("MPU-401: Midi busy\n");
return RET_ERROR (EBUSY);
}
devc->opened = mode;
devc->mode = MODE_SYNTH;
devc->synthno = dev;
devc->inputintr = NULL;
irq2dev[devc->irq] = midi_dev;
if ((err = snd_set_irq_handler (devc->irq, mpuintr) < 0))
return err;
reset_mpu401 (devc);
if (mode & OPEN_READ)
{
exec_cmd (midi_dev, 0x34, 0); /* Return timing bytes in stop mode */
exec_cmd (midi_dev, 0x8B, 0); /* Enable data 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 */
devc->opened = 0;
devc->mode = 0;
snd_release_irq (devc->irq);
devc->inputintr = NULL;
irq2dev[devc->irq] = -1;
}
#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
};
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,
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;
devc->version = tmp;
if ((tmp = exec_cmd (num_midis, 0xAD, 0)) < 0)
return;
devc->revision = tmp;
}
long
attach_mpu401 (long mem_start, struct address_info *hw_config)
{
int i;
unsigned long flags;
char revision_char;
struct mpu_config *devc;
for (i = 0; i < 16; i++)
irq2dev[i] = -1;
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;
for (i = 0; i < 32; i++)
devc->controls[i] = 0x2000;
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' : ' ';
printk (" <MQX-%d%c MIDI Interface>",
ports,
revision_char);
#ifndef SCO
sprintf (mpu_synth_info[num_midis].name,
"MQX-%d%c MIDI Interface #%d",
ports,
revision_char,
n_mpu_devs);
#endif
}
else
{
revision_char = devc->revision ? devc->revision + '@' : ' ';
if (devc->revision > ('Z' - '@'))
revision_char = '+';
devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_FSK;
printk (" <MPU-401 MIDI Interface %d.%d%c>",
(devc->version & 0xf0) >> 4,
devc->version & 0x0f,
revision_char);
#ifndef SCO
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);
#endif
}
#ifndef SCO
strcpy (mpu401_midi_operations[num_midis].info.name,
mpu_synth_info[num_midis].name);
#endif
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);
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;
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:
if (tmr_running)
return 0;
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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