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1/*2 * OPL4 sequencer functions3 *4 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>5 * All rights reserved.6 *7 * Redistribution and use in source and binary forms, with or without8 * modification, are permitted provided that the following conditions9 * are met:10 * 1. Redistributions of source code must retain the above copyright11 * notice, this list of conditions, and the following disclaimer,12 * without modification.13 * 2. The name of the author may not be used to endorse or promote products14 * derived from this software without specific prior written permission.15 *16 * Alternatively, this software may be distributed and/or modified under the17 * terms of the GNU General Public License as published by the Free Software18 * Foundation; either version 2 of the License, or (at your option) any later19 * version.20 *21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF31 * SUCH DAMAGE.32 */33 34#include "opl4_local.h"35#include <linux/init.h>36#include <linux/moduleparam.h>37#include <linux/module.h>38#include <sound/initval.h>39 40MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");41MODULE_DESCRIPTION("OPL4 wavetable synth driver");42MODULE_LICENSE("Dual BSD/GPL");43 44int volume_boost = 8;45 46module_param(volume_boost, int, 0644);47MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds.");48 49static int snd_opl4_seq_use_inc(struct snd_opl4 *opl4)50{51 if (!try_module_get(opl4->card->module))52 return -EFAULT;53 return 0;54}55 56static void snd_opl4_seq_use_dec(struct snd_opl4 *opl4)57{58 module_put(opl4->card->module);59}60 61static int snd_opl4_seq_use(void *private_data, struct snd_seq_port_subscribe *info)62{63 struct snd_opl4 *opl4 = private_data;64 int err;65 66 mutex_lock(&opl4->access_mutex);67 68 if (opl4->used) {69 mutex_unlock(&opl4->access_mutex);70 return -EBUSY;71 }72 opl4->used++;73 74 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {75 err = snd_opl4_seq_use_inc(opl4);76 if (err < 0) {77 mutex_unlock(&opl4->access_mutex);78 return err;79 }80 }81 82 mutex_unlock(&opl4->access_mutex);83 84 snd_opl4_synth_reset(opl4);85 return 0;86}87 88static int snd_opl4_seq_unuse(void *private_data, struct snd_seq_port_subscribe *info)89{90 struct snd_opl4 *opl4 = private_data;91 92 snd_opl4_synth_shutdown(opl4);93 94 mutex_lock(&opl4->access_mutex);95 opl4->used--;96 mutex_unlock(&opl4->access_mutex);97 98 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)99 snd_opl4_seq_use_dec(opl4);100 return 0;101}102 103static const struct snd_midi_op opl4_ops = {104 .note_on = snd_opl4_note_on,105 .note_off = snd_opl4_note_off,106 .note_terminate = snd_opl4_terminate_note,107 .control = snd_opl4_control,108 .sysex = snd_opl4_sysex,109};110 111static int snd_opl4_seq_event_input(struct snd_seq_event *ev, int direct,112 void *private_data, int atomic, int hop)113{114 struct snd_opl4 *opl4 = private_data;115 116 snd_midi_process_event(&opl4_ops, ev, opl4->chset);117 return 0;118}119 120static void snd_opl4_seq_free_port(void *private_data)121{122 struct snd_opl4 *opl4 = private_data;123 124 snd_midi_channel_free_set(opl4->chset);125}126 127static int snd_opl4_seq_probe(struct device *_dev)128{129 struct snd_seq_device *dev = to_seq_dev(_dev);130 struct snd_opl4 *opl4;131 int client;132 struct snd_seq_port_callback pcallbacks;133 134 opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);135 if (!opl4)136 return -EINVAL;137 138 if (snd_yrw801_detect(opl4) < 0)139 return -ENODEV;140 141 opl4->chset = snd_midi_channel_alloc_set(16);142 if (!opl4->chset)143 return -ENOMEM;144 opl4->chset->private_data = opl4;145 146 /* allocate new client */147 client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num,148 "OPL4 Wavetable");149 if (client < 0) {150 snd_midi_channel_free_set(opl4->chset);151 return client;152 }153 opl4->seq_client = client;154 opl4->chset->client = client;155 156 /* create new port */157 memset(&pcallbacks, 0, sizeof(pcallbacks));158 pcallbacks.owner = THIS_MODULE;159 pcallbacks.use = snd_opl4_seq_use;160 pcallbacks.unuse = snd_opl4_seq_unuse;161 pcallbacks.event_input = snd_opl4_seq_event_input;162 pcallbacks.private_free = snd_opl4_seq_free_port;163 pcallbacks.private_data = opl4;164 165 opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks,166 SNDRV_SEQ_PORT_CAP_WRITE |167 SNDRV_SEQ_PORT_CAP_SUBS_WRITE,168 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |169 SNDRV_SEQ_PORT_TYPE_MIDI_GM |170 SNDRV_SEQ_PORT_TYPE_HARDWARE |171 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,172 16, 24,173 "OPL4 Wavetable Port");174 if (opl4->chset->port < 0) {175 int err = opl4->chset->port;176 snd_midi_channel_free_set(opl4->chset);177 snd_seq_delete_kernel_client(client);178 opl4->seq_client = -1;179 return err;180 }181 return 0;182}183 184static int snd_opl4_seq_remove(struct device *_dev)185{186 struct snd_seq_device *dev = to_seq_dev(_dev);187 struct snd_opl4 *opl4;188 189 opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);190 if (!opl4)191 return -EINVAL;192 193 if (opl4->seq_client >= 0) {194 snd_seq_delete_kernel_client(opl4->seq_client);195 opl4->seq_client = -1;196 }197 return 0;198}199 200static struct snd_seq_driver opl4_seq_driver = {201 .driver = {202 .name = KBUILD_MODNAME,203 .probe = snd_opl4_seq_probe,204 .remove = snd_opl4_seq_remove,205 },206 .id = SNDRV_SEQ_DEV_ID_OPL4,207 .argsize = sizeof(struct snd_opl4 *),208};209 210module_snd_seq_driver(opl4_seq_driver);211