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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [sound/] [mpu401.c] - Rev 1765
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/* * sound/mpu401.c * * The low level driver for Roland MPU-401 compatible Midi cards. */ /* * Copyright (C) by Hannu Savolainen 1993-1996 * * USS/Lite 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. */ #include <linux/config.h> #define USE_SEQ_MACROS #define USE_SIMPLE_MACROS #include "sound_config.h" #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI) #include "coproc.h" static int init_sequence[20]; /* NOTE! pos 0 = len, start pos 1. */ #ifdef CONFIG_SEQUENCER static int timer_mode = TMR_INTERNAL, timer_caps = TMR_INTERNAL; #endif 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; int *osp; }; #define DATAPORT(base) (base) #define COMDPORT(base) (base+1) #define STATPORT(base) (base+1) static int mpu401_status (struct mpu_config *devc) { return inb (STATPORT (devc->base)); } #define input_avail(devc) (!(mpu401_status(devc)&INPUT_AVAIL)) #define output_ready(devc) (!(mpu401_status(devc)&OUTPUT_READY)) static void write_command (struct mpu_config *devc, unsigned char cmd) { outb (cmd, COMDPORT (devc->base)); } static int read_data (struct mpu_config *devc) { return inb (DATAPORT (devc->base)); } static void write_data (struct mpu_config *devc, unsigned char byte) { outb (byte, DATAPORT (devc->base)); } #define OUTPUT_READY 0x40 #define INPUT_AVAIL 0x80 #define MPU_ACK 0xFE #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 volatile int irq2dev[17] = {-1, -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, MIDI_TYPE_MPU401, 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 */ }; #ifndef CONFIG_SEQUENCER #define STORE(cmd) #else #define STORE(cmd) \ { \ int len; \ unsigned char obuf[8]; \ cmd; \ seq_input_event(obuf, len); \ } #endif #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 = ((int) (midic & 0xf0) >> 4); devc->m_state = ST_DATABYTE; if (msg < 8) /* Data byte */ { /* printk("midi msg (running status) "); */ msg = ((int) (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; save_flags (flags); cli (); busy = devc->m_busy; devc->m_busy = 1; restore_flags (flags); if (busy) /* Already inside the scanner */ return; n = 50; while (input_avail (devc) && n-- > 0) { unsigned char c = read_data (devc); 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, void *dev_id, struct pt_regs *dummy) { struct mpu_config *devc; int dev; sti (); /* * FreeBSD (and some others) pass unit number to the interrupt handler. * In this case we have to scan the table for first handler. */ if (irq < 1 || irq > 15) { dev = -1; } else dev = irq2dev[irq]; if (dev == -1) { int origirq = irq; for (irq = 0; irq <= 16; irq++) if (irq2dev[irq] != -1) break; if (irq > 15) { printk ("MPU-401: Bogus interrupt #%d?\n", origirq); return; } dev = irq2dev[irq]; devc = &dev_conf[dev]; } else devc = &dev_conf[dev]; if (input_avail (devc)) 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); } } 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 -(ENXIO); devc = &dev_conf[dev]; if (devc->opened) { printk ("MPU-401: Midi busy\n"); return -(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 downloading its microcode. */ if (!devc->initialized) { if (mpu401_status (devc) == 0xff) /* Bus float */ { printk ("MPU-401: Device not initialized properly\n"); return -(EIO); } reset_mpu401 (devc); } irq2dev[devc->irq] = dev; if (midi_devs[dev]->coproc) if ((err = midi_devs[dev]->coproc-> open (midi_devs[dev]->coproc->devc, COPR_MIDI)) < 0) { 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; 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]; /* * Sometimes it takes about 30000 loops before the output becomes ready * (After reset). Normally it takes just about 10 loops. */ for (timeout = 30000; timeout > 0 && !output_ready (devc); timeout--); save_flags (flags); cli (); if (!output_ready (devc)) { printk ("MPU-401: Send data timeout\n"); restore_flags (flags); return 0; } write_data (devc, midi_byte); restore_flags (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 -(EINVAL); } /* * Test for input since pending input seems to block the output. */ if (input_avail (devc)) mpu401_input_loop (devc); /* * Sometimes it takes about 50000 loops before the output becomes ready * (After reset). Normally it takes just about 10 loops. */ timeout = 50000; retry: if (timeout-- <= 0) { printk ("MPU-401: Command (0x%x) timeout\n", (int) cmd->cmd); return -(EIO); } save_flags (flags); cli (); if (!output_ready (devc)) { restore_flags (flags); goto retry; } write_command (devc, cmd->cmd); ok = 0; for (timeout = 50000; timeout > 0 && !ok; timeout--) if (input_avail (devc)) { if (devc->opened && devc->mode == MODE_SYNTH) { if (mpu_input_scanner (devc, read_data (devc)) == MPU_ACK) ok = 1; } else { /* Device is not currently open. Use simpler method */ if (read_data (devc) == MPU_ACK) ok = 1; } } if (!ok) { restore_flags (flags); /* printk ("MPU: No ACK to command (0x%x)\n", (int) cmd->cmd); */ return -(EIO); } if (cmd->nr_args) for (i = 0; i < cmd->nr_args; i++) { for (timeout = 3000; timeout > 0 && !output_ready (devc); timeout--); if (!mpu401_out (dev, cmd->data[i])) { restore_flags (flags); printk ("MPU: Command (0x%x), parm send failed.\n", (int) cmd->cmd); return -(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)) { cmd->data[i] = read_data (devc); ok = 1; } if (!ok) { restore_flags (flags); /* printk ("MPU: No response(%d) to command (0x%x)\n", i, (int) cmd->cmd); */ return -(EIO); } } restore_flags (flags); return ret; } static int mpu_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 (mpu_cmd (dev, 0xD0, 0) < 0) { return 0; } return 1; } switch (status) { case 0xF0: if (mpu_cmd (dev, 0xDF, 0) < 0) { return 0; } return 1; break; default: 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, caddr_t arg) { struct mpu_config *devc; devc = &dev_conf[dev]; switch (cmd) { case 1: memcpy_fromfs ((char *) init_sequence, &((char *) arg)[0], sizeof (init_sequence)); return 0; break; case SNDCTL_MIDI_MPUMODE: if (!(devc->capabilities & MPU_CAP_INTLG)) /* No intelligent mode */ { printk ("MPU-401: Intelligent mode not supported by the HW\n"); return -(EINVAL); } set_uart_mode (dev, devc, !get_user ((int *) arg)); return 0; break; case SNDCTL_MIDI_MPUCMD: { int ret; mpu_command_rec rec; memcpy_fromfs ((char *) &rec, &((char *) arg)[0], sizeof (rec)); if ((ret = mpu401_command (dev, &rec)) < 0) return ret; memcpy_tofs (&((char *) arg)[0], (char *) &rec, sizeof (rec)); return 0; } break; default: return -(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, caddr_t arg) { int midi_dev; struct mpu_config *devc; midi_dev = synth_devs[dev]->midi_dev; if (midi_dev < 0 || midi_dev > num_midis) return -(ENXIO); devc = &dev_conf[midi_dev]; switch (cmd) { case SNDCTL_SYNTH_INFO: memcpy_tofs (&((char *) arg)[0], &mpu_synth_info[midi_dev], sizeof (struct synth_info)); return 0; break; case SNDCTL_SYNTH_MEMAVL: return 0x7fffffff; break; default: return -(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 -(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 downloading its microcode. */ if (!devc->initialized) { if (mpu401_status (devc) == 0xff) /* Bus float */ { printk ("MPU-401: Device not initialized properly\n"); return -(EIO); } reset_mpu401 (devc); } if (devc->opened) { printk ("MPU-401: Midi busy\n"); return -(EBUSY); } devc->mode = MODE_SYNTH; devc->synthno = dev; devc->inputintr = NULL; irq2dev[devc->irq] = midi_dev; if (midi_devs[midi_dev]->coproc) if ((err = midi_devs[midi_dev]->coproc-> open (midi_devs[midi_dev]->coproc->devc, COPR_MIDI)) < 0) { printk ("MPU-401: Can't access coprocessor device\n"); return err; } devc->opened = mode; reset_mpu401 (devc); if (mode & OPEN_READ) { mpu_cmd (midi_dev, 0x8B, 0); /* Enable data in stop mode */ mpu_cmd (midi_dev, 0x34, 0); /* Return timing bytes in stop mode */ mpu_cmd (midi_dev, 0x87, 0); /* Enable pitch & controller */ } 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]; mpu_cmd (midi_dev, 0x15, 0); /* Stop recording, playback and MIDI */ mpu_cmd (midi_dev, 0x8a, 0); /* Disable data in stopped mode */ 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, midi_synth_send_sysex }; 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; unsigned long flags; devc->version = devc->revision = 0; save_flags (flags); cli (); if ((tmp = mpu_cmd (num_midis, 0xAC, 0)) < 0) { restore_flags (flags); return; } if ((tmp & 0xf0) > 0x20) /* Why it's larger than 2.x ??? */ { restore_flags (flags); return; } devc->version = tmp; if ((tmp = mpu_cmd (num_midis, 0xAD, 0)) < 0) { devc->version = 0; restore_flags (flags); return; } devc->revision = tmp; restore_flags (flags); } void attach_mpu401 (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; } devc = &dev_conf[num_midis]; devc->base = hw_config->io_base; devc->osp = hw_config->osp; 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; devc->irq = hw_config->irq; if (devc->irq < 0) { devc->irq *= -1; devc->shared_irq = 1; } irq2dev[devc->irq] = num_midis; if (!hw_config->always_detect) { /* Verify the hardware again */ if (!reset_mpu401 (devc)) { printk ("MPU401: Device didn't respond\n"); return; } if (!devc->shared_irq) if (snd_set_irq_handler (devc->irq, mpuintr, "mpu401", devc->osp) < 0) { printk ("MPU401: Failed to allocate IRQ%d\n", devc->irq); return; } save_flags (flags); cli (); mpu401_chk_version (devc); if (devc->version == 0) mpu401_chk_version (devc); restore_flags (flags); } request_region (hw_config->io_base, 2, "mpu401"); if (devc->version != 0) if (mpu_cmd (num_midis, 0xC5, 0) >= 0) /* Set timebase OK */ if (mpu_cmd (num_midis, 0xE0, 120) >= 0) /* Set tempo OK */ devc->capabilities |= MPU_CAP_INTLG; /* Supports intelligent mode */ mpu401_synth_operations[num_midis] = (struct synth_operations *) (sound_mem_blocks[sound_nblocks] = vmalloc (sizeof (struct synth_operations))); if (sound_nblocks < 1024) sound_nblocks++;; if (mpu401_synth_operations[num_midis] == NULL) { printk ("mpu401: Can't allocate memory\n"); return; } if (!(devc->capabilities & MPU_CAP_INTLG)) /* No intelligent mode */ { memcpy ((char *) mpu401_synth_operations[num_midis], (char *) &std_midi_synth, sizeof (struct synth_operations)); } else { 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' : ' '; 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 ((int) devc->revision > ('Z' - '@')) revision_char = '+'; devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_FSK; if (hw_config->name) sprintf (mpu_synth_info[num_midis].name, "%s (MPU401)", hw_config->name); else sprintf (mpu_synth_info[num_midis].name, "MPU-401 %d.%d%c Midi interface #%d", (int) (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); conf_printf (mpu_synth_info[num_midis].name, hw_config); 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) /* Intelligent mode */ mpu_timer_init (num_midis); irq2dev[devc->irq] = num_midis; midi_devs[num_midis++] = &mpu401_midi_operations[devc->devno]; } 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); write_command (devc, 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--) { save_flags (flags); cli (); if (input_avail (devc)) if (read_data (devc) == MPU_ACK) ok = 1; restore_flags (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->capabilities & MPU_CAP_INTLG)) { return; } if ((devc->uart_mode == 0) == (arg == 0)) { return; /* Already set */ } reset_mpu401 (devc); /* This exits the uart mode */ if (arg) { if (mpu_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; if (check_region (hw_config->io_base, 2)) { printk ("\n\nmpu401.c: I/O port %x already in use\n\n", hw_config->io_base); return 0; } tmp_devc.base = hw_config->io_base; tmp_devc.irq = hw_config->irq; tmp_devc.initialized = 0; tmp_devc.opened = 0; tmp_devc.osp = hw_config->osp; if (hw_config->always_detect) return 1; if (inb (hw_config->io_base + 1) == 0xff) { DDB (printk ("MPU401: Port %x looks dead.\n", hw_config->io_base)); return 0; /* Just bus float? */ } ok = reset_mpu401 (&tmp_devc); if (!ok) { DDB (printk ("MPU401: Reset failed on port %x\n", hw_config->io_base)); } return ok; } void unload_mpu401 (struct address_info *hw_config) { release_region (hw_config->io_base, 2); if (hw_config->always_detect == 0 && hw_config->irq > 0) snd_release_irq (hw_config->irq); } /***************************************************** * Timer stuff ****************************************************/ #if defined(CONFIG_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 + 12) / 24; if (hw_val > max_timebase) hw_val = max_timebase; if (mpu_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; save_flags (flags); cli (); next_event_time = (unsigned long) -1; prev_event_time = 0; curr_ticks = curr_clocks = 0; restore_flags (flags); } static void set_timer_mode (int midi_dev) { if (timer_mode & TMR_MODE_CLS) mpu_cmd (midi_dev, 0x3c, 0); /* Use CLS sync */ else if (timer_mode & TMR_MODE_SMPTE) mpu_cmd (midi_dev, 0x3d, 0); /* Use SMPTE sync */ if (timer_mode & TMR_INTERNAL) { mpu_cmd (midi_dev, 0x80, 0); /* Use MIDI sync */ } else { if (timer_mode & (TMR_MODE_MIDI | TMR_MODE_CLS)) { mpu_cmd (midi_dev, 0x82, 0); /* Use MIDI sync */ mpu_cmd (midi_dev, 0x91, 0); /* Enable ext MIDI ctrl */ } else if (timer_mode & TMR_MODE_FSK) mpu_cmd (midi_dev, 0x81, 0); /* Use FSK sync */ } } static void stop_metronome (int midi_dev) { mpu_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) mpu_cmd (midi_dev, 0x84, 0); /* Disable metronome */ else { mpu_cmd (midi_dev, 0xE4, clks_per_click); mpu_cmd (midi_dev, 0xE6, beats_per_measure); mpu_cmd (midi_dev, 0x83, 0); /* Enable metronome without accents */ } } static int mpu_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) { mpu_cmd (midi_dev, 0x02, 0); /* Send MIDI start */ tmr_running = 1; return TIMER_NOT_ARMED; } else { mpu_cmd (midi_dev, 0x35, 0); /* Enable mode messages to PC */ mpu_cmd (midi_dev, 0x38, 0); /* Enable sys common messages to PC */ mpu_cmd (midi_dev, 0x39, 0); /* Enable real time messages to PC */ mpu_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 -(EBUSY); tmr_reset (); curr_tempo = 50; mpu_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); mpu_cmd (midi_dev, 0xe7, 0x04); /* Send all clocks to host */ mpu_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; mpu_cmd (midi_dev, 0x15, 0); /* Stop all */ mpu_cmd (midi_dev, 0x94, 0); /* Disable clock to host */ mpu_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 mpu_start_timer (midi_dev); break; case TMR_STOP: mpu_cmd (midi_dev, 0x01, 0); /* Send MIDI stop */ stop_metronome (midi_dev); tmr_running = 0; break; case TMR_CONTINUE: if (tmr_running) break; mpu_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 (mpu_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, caddr_t arg) { int midi_dev = sound_timer_devs[dev]->devlink; switch (command) { case SNDCTL_TMR_SOURCE: { int parm = (int) get_user ((int *) arg) & timer_caps; if (parm != 0) { timer_mode = parm; if (timer_mode & TMR_MODE_CLS) mpu_cmd (midi_dev, 0x3c, 0); /* Use CLS sync */ else if (timer_mode & TMR_MODE_SMPTE) mpu_cmd (midi_dev, 0x3d, 0); /* Use SMPTE sync */ } return snd_ioctl_return ((int *) arg, timer_mode); } break; case SNDCTL_TMR_START: mpu_start_timer (midi_dev); return 0; break; case SNDCTL_TMR_STOP: tmr_running = 0; mpu_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; mpu_cmd (midi_dev, 0x03, 0); /* Send MIDI continue */ return 0; break; case SNDCTL_TMR_TIMEBASE: { int val = (int) get_user ((int *) arg); if (val) set_timebase (midi_dev, val); return snd_ioctl_return ((int *) arg, curr_timebase); } break; case SNDCTL_TMR_TEMPO: { int val = (int) get_user ((int *) arg); int ret; if (val) { if (val < 8) val = 8; if (val > 250) val = 250; if ((ret = mpu_cmd (midi_dev, 0xE0, val)) < 0) { printk ("MPU: Can't set tempo to %d\n", (int) val); return ret; } curr_tempo = val; } return snd_ioctl_return ((int *) arg, curr_tempo); } break; case SNDCTL_SEQ_CTRLRATE: if (get_user ((int *) arg) != 0) /* Can't change */ return -(EINVAL); return snd_ioctl_return ((int *) arg, ((curr_tempo * curr_timebase) + 30) / 60); break; case SNDCTL_TMR_METRONOME: metronome_mode = (int) get_user ((int *) arg); setup_metronome (midi_dev); return 0; break; default:; } return -(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 = (unsigned long) -1; sequencer_timer (0); } } 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 (num_sound_timers >= MAX_TIMER_DEV) n = 0; /* Overwrite the system timer */ else n = num_sound_timers++; 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 (devc->revision & 0x40) max_timebase = 10; /* Has the 216 and 240 ppqn modes */ } timer_mode = (TMR_INTERNAL | TMR_MODE_MIDI) & timer_caps; } #endif #endif
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