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linux/sound/pci/ca0106/ca_midi.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

302 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
* Creative Audio MIDI, for the CA0106 Driver
* Version: 0.0.1
*
* Changelog:
* Implementation is based on mpu401 and emu10k1x and
* tested with ca0106.
* mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
*/
#include <linux/spinlock.h>
#include <sound/core.h>
#include <sound/rawmidi.h>
#include "ca_midi.h"
#define ca_midi_write_data(midi, data) midi->write(midi, data, 0)
#define ca_midi_write_cmd(midi, data) midi->write(midi, data, 1)
#define ca_midi_read_data(midi) midi->read(midi, 0)
#define ca_midi_read_stat(midi) midi->read(midi, 1)
#define ca_midi_input_avail(midi) (!(ca_midi_read_stat(midi) & midi->input_avail))
#define ca_midi_output_ready(midi) (!(ca_midi_read_stat(midi) & midi->output_ready))
static void ca_midi_clear_rx(struct snd_ca_midi *midi)
{
int timeout = 100000;
for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
ca_midi_read_data(midi);
#ifdef CONFIG_SND_DEBUG
if (timeout <= 0)
pr_err("ca_midi_clear_rx: timeout (status = 0x%x)\n",
ca_midi_read_stat(midi));
#endif
}
static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
{
unsigned char byte;
if (midi->rmidi == NULL) {
midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
return;
}
spin_lock(&midi->input_lock);
if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
ca_midi_clear_rx(midi);
} else {
byte = ca_midi_read_data(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) && ca_midi_output_ready(midi)) {
if (midi->substream_output &&
snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
ca_midi_write_data(midi, byte);
} else {
midi->interrupt_disable(midi,midi->tx_enable);
}
}
spin_unlock(&midi->output_lock);
}
static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
{
unsigned long flags;
int timeout, ok;
spin_lock_irqsave(&midi->input_lock, flags);
ca_midi_write_data(midi, 0x00);
/* ca_midi_clear_rx(midi); */
ca_midi_write_cmd(midi, cmd);
if (ack) {
ok = 0;
timeout = 10000;
while (!ok && timeout-- > 0) {
if (ca_midi_input_avail(midi)) {
if (ca_midi_read_data(midi) == midi->ack)
ok = 1;
}
}
if (!ok && ca_midi_read_data(midi) == midi->ack)
ok = 1;
} else {
ok = 1;
}
spin_unlock_irqrestore(&midi->input_lock, flags);
if (!ok)
pr_err("ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
cmd,
midi->get_dev_id_port(midi->dev_id),
ca_midi_read_stat(midi),
ca_midi_read_data(midi));
}
static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
{
struct snd_ca_midi *midi = substream->rmidi->private_data;
unsigned long flags;
if (snd_BUG_ON(!midi->dev_id))
return -ENXIO;
spin_lock_irqsave(&midi->open_lock, flags);
midi->midi_mode |= CA_MIDI_MODE_INPUT;
midi->substream_input = substream;
if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 1);
ca_midi_cmd(midi, midi->enter_uart, 1);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static int ca_midi_output_open(struct snd_rawmidi_substream *substream)
{
struct snd_ca_midi *midi = substream->rmidi->private_data;
unsigned long flags;
if (snd_BUG_ON(!midi->dev_id))
return -ENXIO;
spin_lock_irqsave(&midi->open_lock, flags);
midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
midi->substream_output = substream;
if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 1);
ca_midi_cmd(midi, midi->enter_uart, 1);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
{
struct snd_ca_midi *midi = substream->rmidi->private_data;
unsigned long flags;
if (snd_BUG_ON(!midi->dev_id))
return -ENXIO;
spin_lock_irqsave(&midi->open_lock, flags);
midi->interrupt_disable(midi,midi->rx_enable);
midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
midi->substream_input = NULL;
if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 0);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
{
struct snd_ca_midi *midi = substream->rmidi->private_data;
unsigned long flags;
if (snd_BUG_ON(!midi->dev_id))
return -ENXIO;
spin_lock_irqsave(&midi->open_lock, flags);
midi->interrupt_disable(midi,midi->tx_enable);
midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
midi->substream_output = NULL;
if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 0);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct snd_ca_midi *midi = substream->rmidi->private_data;
if (snd_BUG_ON(!midi->dev_id))
return;
if (up) {
midi->interrupt_enable(midi,midi->rx_enable);
} else {
midi->interrupt_disable(midi, midi->rx_enable);
}
}
static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct snd_ca_midi *midi = substream->rmidi->private_data;
unsigned long flags;
if (snd_BUG_ON(!midi->dev_id))
return;
if (up) {
int max = 4;
unsigned char byte;
spin_lock_irqsave(&midi->output_lock, flags);
/* try to send some amount of bytes here before interrupts */
while (max > 0) {
if (ca_midi_output_ready(midi)) {
if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
snd_rawmidi_transmit(substream, &byte, 1) != 1) {
/* no more data */
spin_unlock_irqrestore(&midi->output_lock, flags);
return;
}
ca_midi_write_data(midi, byte);
max--;
} else {
break;
}
}
spin_unlock_irqrestore(&midi->output_lock, flags);
midi->interrupt_enable(midi,midi->tx_enable);
} else {
midi->interrupt_disable(midi,midi->tx_enable);
}
}
static const struct snd_rawmidi_ops ca_midi_output =
{
.open = ca_midi_output_open,
.close = ca_midi_output_close,
.trigger = ca_midi_output_trigger,
};
static const struct snd_rawmidi_ops ca_midi_input =
{
.open = ca_midi_input_open,
.close = ca_midi_input_close,
.trigger = ca_midi_input_trigger,
};
static void ca_midi_free(struct snd_ca_midi *midi)
{
midi->interrupt = NULL;
midi->interrupt_enable = NULL;
midi->interrupt_disable = NULL;
midi->read = NULL;
midi->write = NULL;
midi->get_dev_id_card = NULL;
midi->get_dev_id_port = NULL;
midi->rmidi = NULL;
}
static void ca_rmidi_free(struct snd_rawmidi *rmidi)
{
ca_midi_free(rmidi->private_data);
}
int ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name)
{
struct snd_rawmidi *rmidi;
int err;
if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
return err;
midi->dev_id = dev_id;
midi->interrupt = ca_midi_interrupt;
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, &ca_midi_output);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
rmidi->private_data = midi;
rmidi->private_free = ca_rmidi_free;
midi->rmidi = rmidi;
return 0;
}
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