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v3.15
  1/*
  2 * OPL4 sequencer functions
  3 *
  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 without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    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 products
 14 *    derived from this software without specific prior written permission.
 15 *
 16 * Alternatively, this software may be distributed and/or modified under the
 17 * terms of the GNU General Public License as published by the Free Software
 18 * Foundation; either version 2 of the License, or (at your option) any later
 19 * version.
 20 *
 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 31 * 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 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_new_device(struct snd_seq_device *dev)
128{
 
129	struct snd_opl4 *opl4;
130	int client;
131	struct snd_seq_port_callback pcallbacks;
132
133	opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
134	if (!opl4)
135		return -EINVAL;
136
137	if (snd_yrw801_detect(opl4) < 0)
138		return -ENODEV;
139
140	opl4->chset = snd_midi_channel_alloc_set(16);
141	if (!opl4->chset)
142		return -ENOMEM;
143	opl4->chset->private_data = opl4;
144
145	/* allocate new client */
146	client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num,
147					      "OPL4 Wavetable");
148	if (client < 0) {
149		snd_midi_channel_free_set(opl4->chset);
150		return client;
151	}
152	opl4->seq_client = client;
153	opl4->chset->client = client;
154
155	/* create new port */
156	memset(&pcallbacks, 0, sizeof(pcallbacks));
157	pcallbacks.owner = THIS_MODULE;
158	pcallbacks.use = snd_opl4_seq_use;
159	pcallbacks.unuse = snd_opl4_seq_unuse;
160	pcallbacks.event_input = snd_opl4_seq_event_input;
161	pcallbacks.private_free = snd_opl4_seq_free_port;
162	pcallbacks.private_data = opl4;
163
164	opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks,
165						      SNDRV_SEQ_PORT_CAP_WRITE |
166						      SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
167						      SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
168						      SNDRV_SEQ_PORT_TYPE_MIDI_GM |
169						      SNDRV_SEQ_PORT_TYPE_HARDWARE |
170						      SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
171						      16, 24,
172						      "OPL4 Wavetable Port");
173	if (opl4->chset->port < 0) {
174		int err = opl4->chset->port;
175		snd_midi_channel_free_set(opl4->chset);
176		snd_seq_delete_kernel_client(client);
177		opl4->seq_client = -1;
178		return err;
179	}
180	return 0;
181}
182
183static int snd_opl4_seq_delete_device(struct snd_seq_device *dev)
184{
 
185	struct snd_opl4 *opl4;
186
187	opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
188	if (!opl4)
189		return -EINVAL;
190
191	if (opl4->seq_client >= 0) {
192		snd_seq_delete_kernel_client(opl4->seq_client);
193		opl4->seq_client = -1;
194	}
195	return 0;
196}
197
198static int __init alsa_opl4_synth_init(void)
199{
200	static struct snd_seq_dev_ops ops = {
201		snd_opl4_seq_new_device,
202		snd_opl4_seq_delete_device
203	};
204
205	return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL4, &ops,
206					      sizeof(struct snd_opl4 *));
207}
208
209static void __exit alsa_opl4_synth_exit(void)
210{
211	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL4);
212}
213
214module_init(alsa_opl4_synth_init)
215module_exit(alsa_opl4_synth_exit)
v4.6
  1/*
  2 * OPL4 sequencer functions
  3 *
  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 without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    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 products
 14 *    derived from this software without specific prior written permission.
 15 *
 16 * Alternatively, this software may be distributed and/or modified under the
 17 * terms of the GNU General Public License as published by the Free Software
 18 * Foundation; either version 2 of the License, or (at your option) any later
 19 * version.
 20 *
 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 31 * 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 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);