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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 pt_regs * regs)
- {
- 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 its 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
-