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210 lines
5.8 KiB
210 lines
5.8 KiB
/* |
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* OPL4 sequencer functions |
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* |
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* Copyright (c) 2003 by Clemens Ladisch <[email protected]> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions, and the following disclaimer, |
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* without modification. |
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* 2. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* Alternatively, this software may be distributed and/or modified under the |
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* terms of the GNU General Public License as published by the Free Software |
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* Foundation; either version 2 of the License, or (at your option) any later |
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* version. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR |
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include "opl4_local.h" |
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#include <linux/init.h> |
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#include <linux/moduleparam.h> |
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#include <linux/module.h> |
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#include <sound/initval.h> |
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MODULE_AUTHOR("Clemens Ladisch <[email protected]>"); |
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MODULE_DESCRIPTION("OPL4 wavetable synth driver"); |
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MODULE_LICENSE("Dual BSD/GPL"); |
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int volume_boost = 8; |
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module_param(volume_boost, int, 0644); |
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MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds."); |
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static int snd_opl4_seq_use_inc(struct snd_opl4 *opl4) |
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{ |
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if (!try_module_get(opl4->card->module)) |
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return -EFAULT; |
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return 0; |
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} |
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static void snd_opl4_seq_use_dec(struct snd_opl4 *opl4) |
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{ |
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module_put(opl4->card->module); |
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} |
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static int snd_opl4_seq_use(void *private_data, struct snd_seq_port_subscribe *info) |
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{ |
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struct snd_opl4 *opl4 = private_data; |
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int err; |
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mutex_lock(&opl4->access_mutex); |
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if (opl4->used) { |
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mutex_unlock(&opl4->access_mutex); |
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return -EBUSY; |
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} |
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opl4->used++; |
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if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) { |
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err = snd_opl4_seq_use_inc(opl4); |
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if (err < 0) { |
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mutex_unlock(&opl4->access_mutex); |
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return err; |
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} |
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} |
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mutex_unlock(&opl4->access_mutex); |
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snd_opl4_synth_reset(opl4); |
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return 0; |
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} |
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static int snd_opl4_seq_unuse(void *private_data, struct snd_seq_port_subscribe *info) |
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{ |
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struct snd_opl4 *opl4 = private_data; |
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snd_opl4_synth_shutdown(opl4); |
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mutex_lock(&opl4->access_mutex); |
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opl4->used--; |
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mutex_unlock(&opl4->access_mutex); |
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if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) |
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snd_opl4_seq_use_dec(opl4); |
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return 0; |
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} |
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static const struct snd_midi_op opl4_ops = { |
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.note_on = snd_opl4_note_on, |
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.note_off = snd_opl4_note_off, |
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.note_terminate = snd_opl4_terminate_note, |
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.control = snd_opl4_control, |
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.sysex = snd_opl4_sysex, |
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}; |
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static int snd_opl4_seq_event_input(struct snd_seq_event *ev, int direct, |
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void *private_data, int atomic, int hop) |
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{ |
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struct snd_opl4 *opl4 = private_data; |
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snd_midi_process_event(&opl4_ops, ev, opl4->chset); |
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return 0; |
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} |
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static void snd_opl4_seq_free_port(void *private_data) |
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{ |
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struct snd_opl4 *opl4 = private_data; |
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snd_midi_channel_free_set(opl4->chset); |
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} |
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static int snd_opl4_seq_probe(struct device *_dev) |
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{ |
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struct snd_seq_device *dev = to_seq_dev(_dev); |
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struct snd_opl4 *opl4; |
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int client; |
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struct snd_seq_port_callback pcallbacks; |
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opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); |
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if (!opl4) |
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return -EINVAL; |
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if (snd_yrw801_detect(opl4) < 0) |
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return -ENODEV; |
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opl4->chset = snd_midi_channel_alloc_set(16); |
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if (!opl4->chset) |
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return -ENOMEM; |
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opl4->chset->private_data = opl4; |
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/* allocate new client */ |
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client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num, |
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"OPL4 Wavetable"); |
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if (client < 0) { |
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snd_midi_channel_free_set(opl4->chset); |
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return client; |
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} |
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opl4->seq_client = client; |
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opl4->chset->client = client; |
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/* create new port */ |
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memset(&pcallbacks, 0, sizeof(pcallbacks)); |
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pcallbacks.owner = THIS_MODULE; |
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pcallbacks.use = snd_opl4_seq_use; |
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pcallbacks.unuse = snd_opl4_seq_unuse; |
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pcallbacks.event_input = snd_opl4_seq_event_input; |
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pcallbacks.private_free = snd_opl4_seq_free_port; |
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pcallbacks.private_data = opl4; |
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opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks, |
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SNDRV_SEQ_PORT_CAP_WRITE | |
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SNDRV_SEQ_PORT_CAP_SUBS_WRITE, |
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SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | |
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SNDRV_SEQ_PORT_TYPE_MIDI_GM | |
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SNDRV_SEQ_PORT_TYPE_HARDWARE | |
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SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, |
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16, 24, |
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"OPL4 Wavetable Port"); |
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if (opl4->chset->port < 0) { |
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int err = opl4->chset->port; |
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snd_midi_channel_free_set(opl4->chset); |
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snd_seq_delete_kernel_client(client); |
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opl4->seq_client = -1; |
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return err; |
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} |
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return 0; |
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} |
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static int snd_opl4_seq_remove(struct device *_dev) |
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{ |
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struct snd_seq_device *dev = to_seq_dev(_dev); |
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struct snd_opl4 *opl4; |
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opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); |
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if (!opl4) |
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return -EINVAL; |
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if (opl4->seq_client >= 0) { |
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snd_seq_delete_kernel_client(opl4->seq_client); |
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opl4->seq_client = -1; |
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} |
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return 0; |
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} |
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static struct snd_seq_driver opl4_seq_driver = { |
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.driver = { |
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.name = KBUILD_MODNAME, |
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.probe = snd_opl4_seq_probe, |
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.remove = snd_opl4_seq_remove, |
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}, |
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.id = SNDRV_SEQ_DEV_ID_OPL4, |
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.argsize = sizeof(struct snd_opl4 *), |
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}; |
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module_snd_seq_driver(opl4_seq_driver);
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