| /* |
| * 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 const 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 const 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; |
| } |