Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 293 insertions, 0 deletions

diff --git a/sound/isa/sb/sb8_midi.c b/sound/isa/sb/sb8_midi.c
new file mode 100644
index 000000000000..d2c633a40e74
--- /dev/null
+++ b/sound/isa/sb/sb8_midi.c
@@ -0,0 +1,293 @@
+/*
+ *  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;
+}