+++ /dev/null
-/*
- * sound/oss/midi_synth.c
- *
- * High level midi sequencer manager for dumb MIDI interfaces.
- */
-/*
- * Copyright (C) by Hannu Savolainen 1993-1997
- *
- * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
- * Version 2 (June 1991). See the "COPYING" file distributed with this software
- * for more info.
- */
-/*
- * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
- * Andrew Veliath : fixed running status in MIDI input state machine
- */
-#define USE_SEQ_MACROS
-#define USE_SIMPLE_MACROS
-
-#include "sound_config.h"
-
-#define _MIDI_SYNTH_C_
-
-#include "midi_synth.h"
-
-static int midi2synth[MAX_MIDI_DEV];
-static int sysex_state[MAX_MIDI_DEV] =
-{0};
-static unsigned char prev_out_status[MAX_MIDI_DEV];
-
-#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
-
-void
-do_midi_msg(int synthno, unsigned char *msg, int mlen)
-{
- switch (msg[0] & 0xf0)
- {
- case 0x90:
- if (msg[2] != 0)
- {
- STORE(SEQ_START_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
- break;
- }
- msg[2] = 64;
-
- case 0x80:
- STORE(SEQ_STOP_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
- break;
-
- case 0xA0:
- STORE(SEQ_KEY_PRESSURE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
- break;
-
- case 0xB0:
- STORE(SEQ_CONTROL(synthno, msg[0] & 0x0f,
- msg[1], msg[2]));
- break;
-
- case 0xC0:
- STORE(SEQ_SET_PATCH(synthno, msg[0] & 0x0f, msg[1]));
- break;
-
- case 0xD0:
- STORE(SEQ_CHN_PRESSURE(synthno, msg[0] & 0x0f, msg[1]));
- break;
-
- case 0xE0:
- STORE(SEQ_BENDER(synthno, msg[0] & 0x0f,
- (msg[1] & 0x7f) | ((msg[2] & 0x7f) << 7)));
- break;
-
- default:
- /* printk( "MPU: Unknown midi channel message %02x\n", msg[0]); */
- ;
- }
-}
-EXPORT_SYMBOL(do_midi_msg);
-
-static void
-midi_outc(int midi_dev, int data)
-{
- int timeout;
-
- for (timeout = 0; timeout < 3200; timeout++)
- if (midi_devs[midi_dev]->outputc(midi_dev, (unsigned char) (data & 0xff)))
- {
- if (data & 0x80) /*
- * Status byte
- */
- prev_out_status[midi_dev] =
- (unsigned char) (data & 0xff); /*
- * Store for running status
- */
- return; /*
- * Mission complete
- */
- }
- /*
- * Sorry! No space on buffers.
- */
- printk("Midi send timed out\n");
-}
-
-static int
-prefix_cmd(int midi_dev, unsigned char status)
-{
- if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL)
- return 1;
-
- return midi_devs[midi_dev]->prefix_cmd(midi_dev, status);
-}
-
-static void
-midi_synth_input(int orig_dev, unsigned char data)
-{
- int dev;
- struct midi_input_info *inc;
-
- 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 */
- };
-
- if (orig_dev < 0 || orig_dev > num_midis || midi_devs[orig_dev] == NULL)
- return;
-
- if (data == 0xfe) /* Ignore active sensing */
- return;
-
- dev = midi2synth[orig_dev];
- inc = &midi_devs[orig_dev]->in_info;
-
- switch (inc->m_state)
- {
- case MST_INIT:
- if (data & 0x80) /* MIDI status byte */
- {
- if ((data & 0xf0) == 0xf0) /* Common message */
- {
- switch (data)
- {
- case 0xf0: /* Sysex */
- inc->m_state = MST_SYSEX;
- break; /* Sysex */
-
- case 0xf1: /* MTC quarter frame */
- case 0xf3: /* Song select */
- inc->m_state = MST_DATA;
- inc->m_ptr = 1;
- inc->m_left = 1;
- inc->m_buf[0] = data;
- break;
-
- case 0xf2: /* Song position pointer */
- inc->m_state = MST_DATA;
- inc->m_ptr = 1;
- inc->m_left = 2;
- inc->m_buf[0] = data;
- break;
-
- default:
- inc->m_buf[0] = data;
- inc->m_ptr = 1;
- do_midi_msg(dev, inc->m_buf, inc->m_ptr);
- inc->m_ptr = 0;
- inc->m_left = 0;
- }
- } else
- {
- inc->m_state = MST_DATA;
- inc->m_ptr = 1;
- inc->m_left = len_tab[(data >> 4) - 8];
- inc->m_buf[0] = inc->m_prev_status = data;
- }
- } else if (inc->m_prev_status & 0x80) {
- /* Data byte (use running status) */
- inc->m_ptr = 2;
- inc->m_buf[1] = data;
- inc->m_buf[0] = inc->m_prev_status;
- inc->m_left = len_tab[(inc->m_buf[0] >> 4) - 8] - 1;
- if (inc->m_left > 0)
- inc->m_state = MST_DATA; /* Not done yet */
- else {
- inc->m_state = MST_INIT;
- do_midi_msg(dev, inc->m_buf, inc->m_ptr);
- inc->m_ptr = 0;
- }
- }
- break; /* MST_INIT */
-
- case MST_DATA:
- inc->m_buf[inc->m_ptr++] = data;
- if (--inc->m_left <= 0)
- {
- inc->m_state = MST_INIT;
- do_midi_msg(dev, inc->m_buf, inc->m_ptr);
- inc->m_ptr = 0;
- }
- break; /* MST_DATA */
-
- case MST_SYSEX:
- if (data == 0xf7) /* Sysex end */
- {
- inc->m_state = MST_INIT;
- inc->m_left = 0;
- inc->m_ptr = 0;
- }
- break; /* MST_SYSEX */
-
- default:
- printk("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state, (int) data);
- inc->m_state = MST_INIT;
- }
-}
-
-static void
-leave_sysex(int dev)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int timeout = 0;
-
- if (!sysex_state[dev])
- return;
-
- sysex_state[dev] = 0;
-
- while (!midi_devs[orig_dev]->outputc(orig_dev, 0xf7) &&
- timeout < 1000)
- timeout++;
-
- sysex_state[dev] = 0;
-}
-
-static void
-midi_synth_output(int dev)
-{
- /*
- * Currently NOP
- */
-}
-
-int midi_synth_ioctl(int dev, unsigned int cmd, void __user *arg)
-{
- /*
- * int orig_dev = synth_devs[dev]->midi_dev;
- */
-
- switch (cmd) {
-
- case SNDCTL_SYNTH_INFO:
- if (__copy_to_user(arg, synth_devs[dev]->info, sizeof(struct synth_info)))
- return -EFAULT;
- return 0;
-
- case SNDCTL_SYNTH_MEMAVL:
- return 0x7fffffff;
-
- default:
- return -EINVAL;
- }
-}
-EXPORT_SYMBOL(midi_synth_ioctl);
-
-int
-midi_synth_kill_note(int dev, int channel, int note, int velocity)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int msg, chn;
-
- if (note < 0 || note > 127)
- return 0;
- if (channel < 0 || channel > 15)
- return 0;
- if (velocity < 0)
- velocity = 0;
- if (velocity > 127)
- velocity = 127;
-
- leave_sysex(dev);
-
- msg = prev_out_status[orig_dev] & 0xf0;
- chn = prev_out_status[orig_dev] & 0x0f;
-
- if (chn == channel && ((msg == 0x90 && velocity == 64) || msg == 0x80))
- { /*
- * Use running status
- */
- if (!prefix_cmd(orig_dev, note))
- return 0;
-
- midi_outc(orig_dev, note);
-
- if (msg == 0x90) /*
- * Running status = Note on
- */
- midi_outc(orig_dev, 0); /*
- * Note on with velocity 0 == note
- * off
- */
- else
- midi_outc(orig_dev, velocity);
- } else
- {
- if (velocity == 64)
- {
- if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f)))
- return 0;
- midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /*
- * Note on
- */
- midi_outc(orig_dev, note);
- midi_outc(orig_dev, 0); /*
- * Zero G
- */
- } else
- {
- if (!prefix_cmd(orig_dev, 0x80 | (channel & 0x0f)))
- return 0;
- midi_outc(orig_dev, 0x80 | (channel & 0x0f)); /*
- * Note off
- */
- midi_outc(orig_dev, note);
- midi_outc(orig_dev, velocity);
- }
- }
-
- return 0;
-}
-EXPORT_SYMBOL(midi_synth_kill_note);
-
-int
-midi_synth_set_instr(int dev, int channel, int instr_no)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
-
- if (instr_no < 0 || instr_no > 127)
- instr_no = 0;
- if (channel < 0 || channel > 15)
- return 0;
-
- leave_sysex(dev);
-
- if (!prefix_cmd(orig_dev, 0xc0 | (channel & 0x0f)))
- return 0;
- midi_outc(orig_dev, 0xc0 | (channel & 0x0f)); /*
- * Program change
- */
- midi_outc(orig_dev, instr_no);
-
- return 0;
-}
-EXPORT_SYMBOL(midi_synth_set_instr);
-
-int
-midi_synth_start_note(int dev, int channel, int note, int velocity)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int msg, chn;
-
- if (note < 0 || note > 127)
- return 0;
- if (channel < 0 || channel > 15)
- return 0;
- if (velocity < 0)
- velocity = 0;
- if (velocity > 127)
- velocity = 127;
-
- leave_sysex(dev);
-
- msg = prev_out_status[orig_dev] & 0xf0;
- chn = prev_out_status[orig_dev] & 0x0f;
-
- if (chn == channel && msg == 0x90)
- { /*
- * Use running status
- */
- if (!prefix_cmd(orig_dev, note))
- return 0;
- midi_outc(orig_dev, note);
- midi_outc(orig_dev, velocity);
- } else
- {
- if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f)))
- return 0;
- midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /*
- * Note on
- */
- midi_outc(orig_dev, note);
- midi_outc(orig_dev, velocity);
- }
- return 0;
-}
-EXPORT_SYMBOL(midi_synth_start_note);
-
-void
-midi_synth_reset(int dev)
-{
-
- leave_sysex(dev);
-}
-EXPORT_SYMBOL(midi_synth_reset);
-
-int
-midi_synth_open(int dev, int mode)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int err;
- struct midi_input_info *inc;
-
- if (orig_dev < 0 || orig_dev >= num_midis || midi_devs[orig_dev] == NULL)
- return -ENXIO;
-
- midi2synth[orig_dev] = dev;
- sysex_state[dev] = 0;
- prev_out_status[orig_dev] = 0;
-
- if ((err = midi_devs[orig_dev]->open(orig_dev, mode,
- midi_synth_input, midi_synth_output)) < 0)
- return err;
- inc = &midi_devs[orig_dev]->in_info;
-
- /* save_flags(flags);
- cli();
- don't know against what irqhandler to protect*/
- inc->m_busy = 0;
- inc->m_state = MST_INIT;
- inc->m_ptr = 0;
- inc->m_left = 0;
- inc->m_prev_status = 0x00;
- /* restore_flags(flags); */
-
- return 1;
-}
-EXPORT_SYMBOL(midi_synth_open);
-
-void
-midi_synth_close(int dev)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
-
- leave_sysex(dev);
-
- /*
- * Shut up the synths by sending just single active sensing message.
- */
- midi_devs[orig_dev]->outputc(orig_dev, 0xfe);
-
- midi_devs[orig_dev]->close(orig_dev);
-}
-EXPORT_SYMBOL(midi_synth_close);
-
-void
-midi_synth_hw_control(int dev, unsigned char *event)
-{
-}
-EXPORT_SYMBOL(midi_synth_hw_control);
-
-int
-midi_synth_load_patch(int dev, int format, const char __user *addr,
- int count, int pmgr_flag)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
-
- struct sysex_info sysex;
- int i;
- unsigned long left, src_offs, eox_seen = 0;
- int first_byte = 1;
- int hdr_size = (unsigned long) &sysex.data[0] - (unsigned long) &sysex;
-
- leave_sysex(dev);
-
- if (!prefix_cmd(orig_dev, 0xf0))
- return 0;
-
- /* Invalid patch format */
- if (format != SYSEX_PATCH)
- return -EINVAL;
-
- /* Patch header too short */
- if (count < hdr_size)
- return -EINVAL;
-
- count -= hdr_size;
-
- /*
- * Copy the header from user space
- */
-
- if (copy_from_user(&sysex, addr, hdr_size))
- return -EFAULT;
-
- /* Sysex record too short */
- if ((unsigned)count < (unsigned)sysex.len)
- sysex.len = count;
-
- left = sysex.len;
- src_offs = 0;
-
- for (i = 0; i < left && !signal_pending(current); i++)
- {
- unsigned char data;
-
- if (get_user(data,
- (unsigned char __user *)(addr + hdr_size + i)))
- return -EFAULT;
-
- eox_seen = (i > 0 && data & 0x80); /* End of sysex */
-
- if (eox_seen && data != 0xf7)
- data = 0xf7;
-
- if (i == 0)
- {
- if (data != 0xf0)
- {
- printk(KERN_WARNING "midi_synth: Sysex start missing\n");
- return -EINVAL;
- }
- }
- while (!midi_devs[orig_dev]->outputc(orig_dev, (unsigned char) (data & 0xff)) &&
- !signal_pending(current))
- schedule();
-
- if (!first_byte && data & 0x80)
- return 0;
- first_byte = 0;
- }
-
- if (!eox_seen)
- midi_outc(orig_dev, 0xf7);
- return 0;
-}
-EXPORT_SYMBOL(midi_synth_load_patch);
-
-void midi_synth_panning(int dev, int channel, int pressure)
-{
-}
-EXPORT_SYMBOL(midi_synth_panning);
-
-void midi_synth_aftertouch(int dev, int channel, int pressure)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int msg, chn;
-
- if (pressure < 0 || pressure > 127)
- return;
- if (channel < 0 || channel > 15)
- return;
-
- leave_sysex(dev);
-
- msg = prev_out_status[orig_dev] & 0xf0;
- chn = prev_out_status[orig_dev] & 0x0f;
-
- if (msg != 0xd0 || chn != channel) /*
- * Test for running status
- */
- {
- if (!prefix_cmd(orig_dev, 0xd0 | (channel & 0x0f)))
- return;
- midi_outc(orig_dev, 0xd0 | (channel & 0x0f)); /*
- * Channel pressure
- */
- } else if (!prefix_cmd(orig_dev, pressure))
- return;
-
- midi_outc(orig_dev, pressure);
-}
-EXPORT_SYMBOL(midi_synth_aftertouch);
-
-void
-midi_synth_controller(int dev, int channel, int ctrl_num, int value)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int chn, msg;
-
- if (ctrl_num < 0 || ctrl_num > 127)
- return;
- if (channel < 0 || channel > 15)
- return;
-
- leave_sysex(dev);
-
- msg = prev_out_status[orig_dev] & 0xf0;
- chn = prev_out_status[orig_dev] & 0x0f;
-
- if (msg != 0xb0 || chn != channel)
- {
- if (!prefix_cmd(orig_dev, 0xb0 | (channel & 0x0f)))
- return;
- midi_outc(orig_dev, 0xb0 | (channel & 0x0f));
- } else if (!prefix_cmd(orig_dev, ctrl_num))
- return;
-
- midi_outc(orig_dev, ctrl_num);
- midi_outc(orig_dev, value & 0x7f);
-}
-EXPORT_SYMBOL(midi_synth_controller);
-
-void
-midi_synth_bender(int dev, int channel, int value)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int msg, prev_chn;
-
- if (channel < 0 || channel > 15)
- return;
-
- if (value < 0 || value > 16383)
- return;
-
- leave_sysex(dev);
-
- msg = prev_out_status[orig_dev] & 0xf0;
- prev_chn = prev_out_status[orig_dev] & 0x0f;
-
- if (msg != 0xd0 || prev_chn != channel) /*
- * Test for running status
- */
- {
- if (!prefix_cmd(orig_dev, 0xe0 | (channel & 0x0f)))
- return;
- midi_outc(orig_dev, 0xe0 | (channel & 0x0f));
- } else if (!prefix_cmd(orig_dev, value & 0x7f))
- return;
-
- midi_outc(orig_dev, value & 0x7f);
- midi_outc(orig_dev, (value >> 7) & 0x7f);
-}
-EXPORT_SYMBOL(midi_synth_bender);
-
-void
-midi_synth_setup_voice(int dev, int voice, int channel)
-{
-}
-EXPORT_SYMBOL(midi_synth_setup_voice);
-
-int
-midi_synth_send_sysex(int dev, unsigned char *bytes, int len)
-{
- int orig_dev = synth_devs[dev]->midi_dev;
- int i;
-
- for (i = 0; i < len; i++)
- {
- switch (bytes[i])
- {
- case 0xf0: /* Start sysex */
- if (!prefix_cmd(orig_dev, 0xf0))
- return 0;
- sysex_state[dev] = 1;
- break;
-
- case 0xf7: /* End sysex */
- if (!sysex_state[dev]) /* Orphan sysex end */
- return 0;
- sysex_state[dev] = 0;
- break;
-
- default:
- if (!sysex_state[dev])
- return 0;
-
- if (bytes[i] & 0x80) /* Error. Another message before sysex end */
- {
- bytes[i] = 0xf7; /* Sysex end */
- sysex_state[dev] = 0;
- }
- }
-
- if (!midi_devs[orig_dev]->outputc(orig_dev, bytes[i]))
- {
-/*
- * Hardware level buffer is full. Abort the sysex message.
- */
-
- int timeout = 0;
-
- bytes[i] = 0xf7;
- sysex_state[dev] = 0;
-
- while (!midi_devs[orig_dev]->outputc(orig_dev, bytes[i]) &&
- timeout < 1000)
- timeout++;
- }
- if (!sysex_state[dev])
- return 0;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(midi_synth_send_sysex);
-
projects / linux-2.6-microblaze.git / blobdiff