1 /*
2 * Interface for OSS sequencer emulation
3 *
4 * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include <linux/export.h>
22 #include "opl3_voice.h"
23
24 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
25 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg);
26 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg);
27 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count);
28 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg);
29
30 /* operators */
31
32 extern struct snd_midi_op opl3_ops;
33
34 static struct snd_seq_oss_callback oss_callback = {
35 .owner = THIS_MODULE,
36 .open = snd_opl3_open_seq_oss,
37 .close = snd_opl3_close_seq_oss,
38 .ioctl = snd_opl3_ioctl_seq_oss,
39 .load_patch = snd_opl3_load_patch_seq_oss,
40 .reset = snd_opl3_reset_seq_oss,
41 };
42
snd_opl3_oss_event_input(struct snd_seq_event * ev,int direct,void * private_data,int atomic,int hop)43 static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct,
44 void *private_data, int atomic, int hop)
45 {
46 struct snd_opl3 *opl3 = private_data;
47
48 if (ev->type != SNDRV_SEQ_EVENT_OSS)
49 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset);
50 return 0;
51 }
52
53 /* ------------------------------ */
54
snd_opl3_oss_free_port(void * private_data)55 static void snd_opl3_oss_free_port(void *private_data)
56 {
57 struct snd_opl3 *opl3 = private_data;
58
59 snd_midi_channel_free_set(opl3->oss_chset);
60 }
61
snd_opl3_oss_create_port(struct snd_opl3 * opl3)62 static int snd_opl3_oss_create_port(struct snd_opl3 * opl3)
63 {
64 struct snd_seq_port_callback callbacks;
65 char name[32];
66 int voices, opl_ver;
67
68 voices = (opl3->hardware < OPL3_HW_OPL3) ?
69 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
70 opl3->oss_chset = snd_midi_channel_alloc_set(voices);
71 if (opl3->oss_chset == NULL)
72 return -ENOMEM;
73 opl3->oss_chset->private_data = opl3;
74
75 memset(&callbacks, 0, sizeof(callbacks));
76 callbacks.owner = THIS_MODULE;
77 callbacks.event_input = snd_opl3_oss_event_input;
78 callbacks.private_free = snd_opl3_oss_free_port;
79 callbacks.private_data = opl3;
80
81 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
82 sprintf(name, "OPL%i OSS Port", opl_ver);
83
84 opl3->oss_chset->client = opl3->seq_client;
85 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
86 SNDRV_SEQ_PORT_CAP_WRITE,
87 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
88 SNDRV_SEQ_PORT_TYPE_MIDI_GM |
89 SNDRV_SEQ_PORT_TYPE_HARDWARE |
90 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
91 voices, voices,
92 name);
93 if (opl3->oss_chset->port < 0) {
94 int port;
95 port = opl3->oss_chset->port;
96 snd_midi_channel_free_set(opl3->oss_chset);
97 return port;
98 }
99 return 0;
100 }
101
102 /* ------------------------------ */
103
104 /* register OSS synth */
snd_opl3_init_seq_oss(struct snd_opl3 * opl3,char * name)105 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name)
106 {
107 struct snd_seq_oss_reg *arg;
108 struct snd_seq_device *dev;
109
110 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
111 sizeof(struct snd_seq_oss_reg), &dev) < 0)
112 return;
113
114 opl3->oss_seq_dev = dev;
115 strlcpy(dev->name, name, sizeof(dev->name));
116 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
117 arg->type = SYNTH_TYPE_FM;
118 if (opl3->hardware < OPL3_HW_OPL3) {
119 arg->subtype = FM_TYPE_ADLIB;
120 arg->nvoices = MAX_OPL2_VOICES;
121 } else {
122 arg->subtype = FM_TYPE_OPL3;
123 arg->nvoices = MAX_OPL3_VOICES;
124 }
125 arg->oper = oss_callback;
126 arg->private_data = opl3;
127
128 if (snd_opl3_oss_create_port(opl3)) {
129 /* register to OSS synth table */
130 snd_device_register(opl3->card, dev);
131 }
132 }
133
134 /* unregister */
snd_opl3_free_seq_oss(struct snd_opl3 * opl3)135 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3)
136 {
137 if (opl3->oss_seq_dev) {
138 /* The instance should have been released in prior */
139 opl3->oss_seq_dev = NULL;
140 }
141 }
142
143 /* ------------------------------ */
144
145 /* open OSS sequencer */
snd_opl3_open_seq_oss(struct snd_seq_oss_arg * arg,void * closure)146 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
147 {
148 struct snd_opl3 *opl3 = closure;
149 int err;
150
151 if (snd_BUG_ON(!arg))
152 return -ENXIO;
153
154 if ((err = snd_opl3_synth_setup(opl3)) < 0)
155 return err;
156
157 /* fill the argument data */
158 arg->private_data = opl3;
159 arg->addr.client = opl3->oss_chset->client;
160 arg->addr.port = opl3->oss_chset->port;
161
162 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
163 return err;
164
165 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH;
166 return 0;
167 }
168
169 /* close OSS sequencer */
snd_opl3_close_seq_oss(struct snd_seq_oss_arg * arg)170 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg)
171 {
172 struct snd_opl3 *opl3;
173
174 if (snd_BUG_ON(!arg))
175 return -ENXIO;
176 opl3 = arg->private_data;
177
178 snd_opl3_synth_cleanup(opl3);
179
180 snd_opl3_synth_use_dec(opl3);
181 return 0;
182 }
183
184 /* load patch */
185
186 /* from sound_config.h */
187 #define SBFM_MAXINSTR 256
188
snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg * arg,int format,const char __user * buf,int offs,int count)189 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
190 const char __user *buf, int offs, int count)
191 {
192 struct snd_opl3 *opl3;
193 struct sbi_instrument sbi;
194 char name[32];
195 int err, type;
196
197 if (snd_BUG_ON(!arg))
198 return -ENXIO;
199 opl3 = arg->private_data;
200
201 if (format == FM_PATCH)
202 type = FM_PATCH_OPL2;
203 else if (format == OPL3_PATCH)
204 type = FM_PATCH_OPL3;
205 else
206 return -EINVAL;
207
208 if (count < (int)sizeof(sbi)) {
209 snd_printk(KERN_ERR "FM Error: Patch record too short\n");
210 return -EINVAL;
211 }
212 if (copy_from_user(&sbi, buf, sizeof(sbi)))
213 return -EFAULT;
214
215 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {
216 snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n",
217 sbi.channel);
218 return -EINVAL;
219 }
220
221 memset(name, 0, sizeof(name));
222 sprintf(name, "Chan%d", sbi.channel);
223
224 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL,
225 sbi.operators);
226 if (err < 0)
227 return err;
228
229 return sizeof(sbi);
230 }
231
232 /* ioctl */
snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg * arg,unsigned int cmd,unsigned long ioarg)233 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
234 unsigned long ioarg)
235 {
236 struct snd_opl3 *opl3;
237
238 if (snd_BUG_ON(!arg))
239 return -ENXIO;
240 opl3 = arg->private_data;
241 switch (cmd) {
242 case SNDCTL_FM_LOAD_INSTR:
243 snd_printk(KERN_ERR "OPL3: "
244 "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. "
245 "Fix the program.\n");
246 return -EINVAL;
247
248 case SNDCTL_SYNTH_MEMAVL:
249 return 0x7fffffff;
250
251 case SNDCTL_FM_4OP_ENABLE:
252 // handled automatically by OPL instrument type
253 return 0;
254
255 default:
256 return -EINVAL;
257 }
258 return 0;
259 }
260
261 /* reset device */
snd_opl3_reset_seq_oss(struct snd_seq_oss_arg * arg)262 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)
263 {
264 struct snd_opl3 *opl3;
265
266 if (snd_BUG_ON(!arg))
267 return -ENXIO;
268 opl3 = arg->private_data;
269
270 return 0;
271 }
272