| /* |
| * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| * Routines for control of SoundBlaster cards - MIDI interface |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * -- |
| * |
| * Sun May 9 22:54:38 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk> |
| * Fixed typo in snd_sb8dsp_midi_new_device which prevented midi from |
| * working. |
| * |
| * Sun May 11 12:34:56 UTC 2003 Clemens Ladisch <clemens@ladisch.de> |
| * Added full duplex UART mode for DSP version 2.0 and later. |
| */ |
| |
| #include <sound/driver.h> |
| #include <asm/io.h> |
| #include <linux/time.h> |
| #include <sound/core.h> |
| #include <sound/sb.h> |
| |
| /* |
| |
| */ |
| |
| irqreturn_t snd_sb8dsp_midi_interrupt(sb_t * chip) |
| { |
| snd_rawmidi_t *rmidi; |
| int max = 64; |
| char byte; |
| |
| if (chip == NULL || (rmidi = chip->rmidi) == NULL) { |
| inb(SBP(chip, DATA_AVAIL)); /* ack interrupt */ |
| return IRQ_NONE; |
| } |
| spin_lock(&chip->midi_input_lock); |
| while (max-- > 0) { |
| if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { |
| byte = inb(SBP(chip, READ)); |
| if (chip->open & SB_OPEN_MIDI_INPUT_TRIGGER) { |
| snd_rawmidi_receive(chip->midi_substream_input, &byte, 1); |
| } |
| } |
| } |
| spin_unlock(&chip->midi_input_lock); |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| |
| */ |
| |
| static int snd_sb8dsp_midi_input_open(snd_rawmidi_substream_t * substream) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| unsigned int valid_open_flags; |
| |
| chip = substream->rmidi->private_data; |
| valid_open_flags = chip->hardware >= SB_HW_20 |
| ? SB_OPEN_MIDI_OUTPUT | SB_OPEN_MIDI_OUTPUT_TRIGGER : 0; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| if (chip->open & ~valid_open_flags) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| return -EAGAIN; |
| } |
| chip->open |= SB_OPEN_MIDI_INPUT; |
| chip->midi_substream_input = substream; |
| if (!(chip->open & SB_OPEN_MIDI_OUTPUT)) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| snd_sbdsp_reset(chip); /* reset DSP */ |
| if (chip->hardware >= SB_HW_20) |
| snd_sbdsp_command(chip, SB_DSP_MIDI_UART_IRQ); |
| } else { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| } |
| return 0; |
| } |
| |
| static int snd_sb8dsp_midi_output_open(snd_rawmidi_substream_t * substream) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| unsigned int valid_open_flags; |
| |
| chip = substream->rmidi->private_data; |
| valid_open_flags = chip->hardware >= SB_HW_20 |
| ? SB_OPEN_MIDI_INPUT | SB_OPEN_MIDI_INPUT_TRIGGER : 0; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| if (chip->open & ~valid_open_flags) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| return -EAGAIN; |
| } |
| chip->open |= SB_OPEN_MIDI_OUTPUT; |
| chip->midi_substream_output = substream; |
| if (!(chip->open & SB_OPEN_MIDI_INPUT)) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| snd_sbdsp_reset(chip); /* reset DSP */ |
| if (chip->hardware >= SB_HW_20) |
| snd_sbdsp_command(chip, SB_DSP_MIDI_UART_IRQ); |
| } else { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| } |
| return 0; |
| } |
| |
| static int snd_sb8dsp_midi_input_close(snd_rawmidi_substream_t * substream) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| |
| chip = substream->rmidi->private_data; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| chip->open &= ~(SB_OPEN_MIDI_INPUT | SB_OPEN_MIDI_INPUT_TRIGGER); |
| chip->midi_substream_input = NULL; |
| if (!(chip->open & SB_OPEN_MIDI_OUTPUT)) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| snd_sbdsp_reset(chip); /* reset DSP */ |
| } else { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| } |
| return 0; |
| } |
| |
| static int snd_sb8dsp_midi_output_close(snd_rawmidi_substream_t * substream) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| |
| chip = substream->rmidi->private_data; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| chip->open &= ~(SB_OPEN_MIDI_OUTPUT | SB_OPEN_MIDI_OUTPUT_TRIGGER); |
| chip->midi_substream_output = NULL; |
| if (!(chip->open & SB_OPEN_MIDI_INPUT)) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| snd_sbdsp_reset(chip); /* reset DSP */ |
| } else { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| } |
| return 0; |
| } |
| |
| static void snd_sb8dsp_midi_input_trigger(snd_rawmidi_substream_t * substream, int up) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| |
| chip = substream->rmidi->private_data; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| if (up) { |
| if (!(chip->open & SB_OPEN_MIDI_INPUT_TRIGGER)) { |
| if (chip->hardware < SB_HW_20) |
| snd_sbdsp_command(chip, SB_DSP_MIDI_INPUT_IRQ); |
| chip->open |= SB_OPEN_MIDI_INPUT_TRIGGER; |
| } |
| } else { |
| if (chip->open & SB_OPEN_MIDI_INPUT_TRIGGER) { |
| if (chip->hardware < SB_HW_20) |
| snd_sbdsp_command(chip, SB_DSP_MIDI_INPUT_IRQ); |
| chip->open &= ~SB_OPEN_MIDI_INPUT_TRIGGER; |
| } |
| } |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| } |
| |
| static void snd_sb8dsp_midi_output_write(snd_rawmidi_substream_t * substream) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| char byte; |
| int max = 32; |
| |
| /* how big is Tx FIFO? */ |
| chip = substream->rmidi->private_data; |
| while (max-- > 0) { |
| spin_lock_irqsave(&chip->open_lock, flags); |
| if (snd_rawmidi_transmit_peek(substream, &byte, 1) != 1) { |
| chip->open &= ~SB_OPEN_MIDI_OUTPUT_TRIGGER; |
| del_timer(&chip->midi_timer); |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| break; |
| } |
| if (chip->hardware >= SB_HW_20) { |
| int timeout = 8; |
| while ((inb(SBP(chip, STATUS)) & 0x80) != 0 && --timeout > 0) |
| ; |
| if (timeout == 0) { |
| /* Tx FIFO full - try again later */ |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| break; |
| } |
| outb(byte, SBP(chip, WRITE)); |
| } else { |
| snd_sbdsp_command(chip, SB_DSP_MIDI_OUTPUT); |
| snd_sbdsp_command(chip, byte); |
| } |
| snd_rawmidi_transmit_ack(substream, 1); |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| } |
| } |
| |
| static void snd_sb8dsp_midi_output_timer(unsigned long data) |
| { |
| snd_rawmidi_substream_t * substream = (snd_rawmidi_substream_t *) data; |
| sb_t * chip = substream->rmidi->private_data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&chip->open_lock, flags); |
| chip->midi_timer.expires = 1 + jiffies; |
| add_timer(&chip->midi_timer); |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| snd_sb8dsp_midi_output_write(substream); |
| } |
| |
| static void snd_sb8dsp_midi_output_trigger(snd_rawmidi_substream_t * substream, int up) |
| { |
| unsigned long flags; |
| sb_t *chip; |
| |
| chip = substream->rmidi->private_data; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| if (up) { |
| if (!(chip->open & SB_OPEN_MIDI_OUTPUT_TRIGGER)) { |
| init_timer(&chip->midi_timer); |
| chip->midi_timer.function = snd_sb8dsp_midi_output_timer; |
| chip->midi_timer.data = (unsigned long) substream; |
| chip->midi_timer.expires = 1 + jiffies; |
| add_timer(&chip->midi_timer); |
| chip->open |= SB_OPEN_MIDI_OUTPUT_TRIGGER; |
| } |
| } else { |
| if (chip->open & SB_OPEN_MIDI_OUTPUT_TRIGGER) { |
| chip->open &= ~SB_OPEN_MIDI_OUTPUT_TRIGGER; |
| } |
| } |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| |
| if (up) |
| snd_sb8dsp_midi_output_write(substream); |
| } |
| |
| /* |
| |
| */ |
| |
| static snd_rawmidi_ops_t snd_sb8dsp_midi_output = |
| { |
| .open = snd_sb8dsp_midi_output_open, |
| .close = snd_sb8dsp_midi_output_close, |
| .trigger = snd_sb8dsp_midi_output_trigger, |
| }; |
| |
| static snd_rawmidi_ops_t snd_sb8dsp_midi_input = |
| { |
| .open = snd_sb8dsp_midi_input_open, |
| .close = snd_sb8dsp_midi_input_close, |
| .trigger = snd_sb8dsp_midi_input_trigger, |
| }; |
| |
| int snd_sb8dsp_midi(sb_t *chip, int device, snd_rawmidi_t ** rrawmidi) |
| { |
| snd_rawmidi_t *rmidi; |
| int err; |
| |
| if (rrawmidi) |
| *rrawmidi = NULL; |
| if ((err = snd_rawmidi_new(chip->card, "SB8 MIDI", device, 1, 1, &rmidi)) < 0) |
| return err; |
| strcpy(rmidi->name, "SB8 MIDI"); |
| snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_sb8dsp_midi_output); |
| snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_sb8dsp_midi_input); |
| rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT; |
| if (chip->hardware >= SB_HW_20) |
| rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; |
| rmidi->private_data = chip; |
| chip->rmidi = rmidi; |
| if (rrawmidi) |
| *rrawmidi = rmidi; |
| return 0; |
| } |
