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path: root/sound/pci/emu10k1/emumpu401.c
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Diffstat (limited to 'sound/pci/emu10k1/emumpu401.c')
-rw-r--r--sound/pci/emu10k1/emumpu401.c399
1 files changed, 399 insertions, 0 deletions
diff --git a/sound/pci/emu10k1/emumpu401.c b/sound/pci/emu10k1/emumpu401.c
new file mode 100644
index 000000000..fdf2b0ada
--- /dev/null
+++ b/sound/pci/emu10k1/emumpu401.c
@@ -0,0 +1,399 @@
+/*
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ * Routines for control of EMU10K1 MPU-401 in UART mode
+ *
+ *
+ * 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
+ *
+ */
+
+#include <linux/time.h>
+#include <linux/init.h>
+#include <sound/core.h>
+#include <sound/emu10k1.h>
+
+#define EMU10K1_MIDI_MODE_INPUT (1<<0)
+#define EMU10K1_MIDI_MODE_OUTPUT (1<<1)
+
+static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
+ struct snd_emu10k1_midi *mpu, int idx)
+{
+ if (emu->audigy)
+ return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
+ else
+ return inb(emu->port + mpu->port + idx);
+}
+
+static inline void mpu401_write(struct snd_emu10k1 *emu,
+ struct snd_emu10k1_midi *mpu, int data, int idx)
+{
+ if (emu->audigy)
+ snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
+ else
+ outb(data, emu->port + mpu->port + idx);
+}
+
+#define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
+#define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
+#define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
+#define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
+
+#define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
+#define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
+
+#define MPU401_RESET 0xff
+#define MPU401_ENTER_UART 0x3f
+#define MPU401_ACK 0xfe
+
+static void mpu401_clear_rx(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *mpu)
+{
+ int timeout = 100000;
+ for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
+ mpu401_read_data(emu, mpu);
+#ifdef CONFIG_SND_DEBUG
+ if (timeout <= 0)
+ dev_err(emu->card->dev,
+ "cmd: clear rx timeout (status = 0x%x)\n",
+ mpu401_read_stat(emu, mpu));
+#endif
+}
+
+/*
+
+ */
+
+static void do_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, unsigned int status)
+{
+ unsigned char byte;
+
+ if (midi->rmidi == NULL) {
+ snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable);
+ return;
+ }
+
+ spin_lock(&midi->input_lock);
+ if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
+ if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
+ mpu401_clear_rx(emu, midi);
+ } else {
+ byte = mpu401_read_data(emu, midi);
+ if (midi->substream_input)
+ snd_rawmidi_receive(midi->substream_input, &byte, 1);
+ }
+ }
+ spin_unlock(&midi->input_lock);
+
+ spin_lock(&midi->output_lock);
+ if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
+ if (midi->substream_output &&
+ snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
+ mpu401_write_data(emu, midi, byte);
+ } else {
+ snd_emu10k1_intr_disable(emu, midi->tx_enable);
+ }
+ }
+ spin_unlock(&midi->output_lock);
+}
+
+static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
+{
+ do_emu10k1_midi_interrupt(emu, &emu->midi, status);
+}
+
+static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
+{
+ do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
+}
+
+static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
+{
+ unsigned long flags;
+ int timeout, ok;
+
+ spin_lock_irqsave(&midi->input_lock, flags);
+ mpu401_write_data(emu, midi, 0x00);
+ /* mpu401_clear_rx(emu, midi); */
+
+ mpu401_write_cmd(emu, midi, cmd);
+ if (ack) {
+ ok = 0;
+ timeout = 10000;
+ while (!ok && timeout-- > 0) {
+ if (mpu401_input_avail(emu, midi)) {
+ if (mpu401_read_data(emu, midi) == MPU401_ACK)
+ ok = 1;
+ }
+ }
+ if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
+ ok = 1;
+ } else {
+ ok = 1;
+ }
+ spin_unlock_irqrestore(&midi->input_lock, flags);
+ if (!ok) {
+ dev_err(emu->card->dev,
+ "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
+ cmd, emu->port,
+ mpu401_read_stat(emu, midi),
+ mpu401_read_data(emu, midi));
+ return 1;
+ }
+ return 0;
+}
+
+static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
+{
+ struct snd_emu10k1 *emu;
+ struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ emu = midi->emu;
+ if (snd_BUG_ON(!emu))
+ return -ENXIO;
+ spin_lock_irqsave(&midi->open_lock, flags);
+ midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
+ midi->substream_input = substream;
+ if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
+ goto error_out;
+ if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
+ goto error_out;
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return 0;
+
+error_out:
+ return -EIO;
+}
+
+static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
+{
+ struct snd_emu10k1 *emu;
+ struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ emu = midi->emu;
+ if (snd_BUG_ON(!emu))
+ return -ENXIO;
+ spin_lock_irqsave(&midi->open_lock, flags);
+ midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
+ midi->substream_output = substream;
+ if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
+ goto error_out;
+ if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
+ goto error_out;
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return 0;
+
+error_out:
+ return -EIO;
+}
+
+static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
+{
+ struct snd_emu10k1 *emu;
+ struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
+ unsigned long flags;
+ int err = 0;
+
+ emu = midi->emu;
+ if (snd_BUG_ON(!emu))
+ return -ENXIO;
+ spin_lock_irqsave(&midi->open_lock, flags);
+ snd_emu10k1_intr_disable(emu, midi->rx_enable);
+ midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
+ midi->substream_input = NULL;
+ if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return err;
+}
+
+static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
+{
+ struct snd_emu10k1 *emu;
+ struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
+ unsigned long flags;
+ int err = 0;
+
+ emu = midi->emu;
+ if (snd_BUG_ON(!emu))
+ return -ENXIO;
+ spin_lock_irqsave(&midi->open_lock, flags);
+ snd_emu10k1_intr_disable(emu, midi->tx_enable);
+ midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
+ midi->substream_output = NULL;
+ if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
+ } else {
+ spin_unlock_irqrestore(&midi->open_lock, flags);
+ }
+ return err;
+}
+
+static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+ struct snd_emu10k1 *emu;
+ struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
+ emu = midi->emu;
+ if (snd_BUG_ON(!emu))
+ return;
+
+ if (up)
+ snd_emu10k1_intr_enable(emu, midi->rx_enable);
+ else
+ snd_emu10k1_intr_disable(emu, midi->rx_enable);
+}
+
+static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+ struct snd_emu10k1 *emu;
+ struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
+ unsigned long flags;
+
+ emu = midi->emu;
+ if (snd_BUG_ON(!emu))
+ return;
+
+ if (up) {
+ int max = 4;
+ unsigned char byte;
+
+ /* try to send some amount of bytes here before interrupts */
+ spin_lock_irqsave(&midi->output_lock, flags);
+ while (max > 0) {
+ if (mpu401_output_ready(emu, midi)) {
+ if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
+ snd_rawmidi_transmit(substream, &byte, 1) != 1) {
+ /* no more data */
+ spin_unlock_irqrestore(&midi->output_lock, flags);
+ return;
+ }
+ mpu401_write_data(emu, midi, byte);
+ max--;
+ } else {
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&midi->output_lock, flags);
+ snd_emu10k1_intr_enable(emu, midi->tx_enable);
+ } else {
+ snd_emu10k1_intr_disable(emu, midi->tx_enable);
+ }
+}
+
+/*
+
+ */
+
+static struct snd_rawmidi_ops snd_emu10k1_midi_output =
+{
+ .open = snd_emu10k1_midi_output_open,
+ .close = snd_emu10k1_midi_output_close,
+ .trigger = snd_emu10k1_midi_output_trigger,
+};
+
+static struct snd_rawmidi_ops snd_emu10k1_midi_input =
+{
+ .open = snd_emu10k1_midi_input_open,
+ .close = snd_emu10k1_midi_input_close,
+ .trigger = snd_emu10k1_midi_input_trigger,
+};
+
+static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
+{
+ struct snd_emu10k1_midi *midi = rmidi->private_data;
+ midi->interrupt = NULL;
+ midi->rmidi = NULL;
+}
+
+static int emu10k1_midi_init(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, int device, char *name)
+{
+ struct snd_rawmidi *rmidi;
+ int err;
+
+ if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
+ return err;
+ midi->emu = emu;
+ spin_lock_init(&midi->open_lock);
+ spin_lock_init(&midi->input_lock);
+ spin_lock_init(&midi->output_lock);
+ strcpy(rmidi->name, name);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+ rmidi->private_data = midi;
+ rmidi->private_free = snd_emu10k1_midi_free;
+ midi->rmidi = rmidi;
+ return 0;
+}
+
+int snd_emu10k1_midi(struct snd_emu10k1 *emu)
+{
+ struct snd_emu10k1_midi *midi = &emu->midi;
+ int err;
+
+ if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
+ return err;
+
+ midi->tx_enable = INTE_MIDITXENABLE;
+ midi->rx_enable = INTE_MIDIRXENABLE;
+ midi->port = MUDATA;
+ midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
+ midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
+ midi->interrupt = snd_emu10k1_midi_interrupt;
+ return 0;
+}
+
+int snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
+{
+ struct snd_emu10k1_midi *midi;
+ int err;
+
+ midi = &emu->midi;
+ if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
+ return err;
+
+ midi->tx_enable = INTE_MIDITXENABLE;
+ midi->rx_enable = INTE_MIDIRXENABLE;
+ midi->port = A_MUDATA1;
+ midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
+ midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
+ midi->interrupt = snd_emu10k1_midi_interrupt;
+
+ midi = &emu->midi2;
+ if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
+ return err;
+
+ midi->tx_enable = INTE_A_MIDITXENABLE2;
+ midi->rx_enable = INTE_A_MIDIRXENABLE2;
+ midi->port = A_MUDATA2;
+ midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
+ midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
+ midi->interrupt = snd_emu10k1_midi_interrupt2;
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 20:56:54 +0000