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 "opl3_voice.h"
22
23 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
24 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg);
25 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg);
26 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count);
27 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg);
28
29 /* */
30
snd_enter_user(void)31 static inline mm_segment_t snd_enter_user(void)
32 {
33 mm_segment_t fs = get_fs();
34 set_fs(get_ds());
35 return fs;
36 }
37
snd_leave_user(mm_segment_t fs)38 static inline void snd_leave_user(mm_segment_t fs)
39 {
40 set_fs(fs);
41 }
42
43 /* operators */
44
45 extern struct snd_midi_op opl3_ops;
46
47 static struct snd_seq_oss_callback oss_callback = {
48 .owner = THIS_MODULE,
49 .open = snd_opl3_open_seq_oss,
50 .close = snd_opl3_close_seq_oss,
51 .ioctl = snd_opl3_ioctl_seq_oss,
52 .load_patch = snd_opl3_load_patch_seq_oss,
53 .reset = snd_opl3_reset_seq_oss,
54 };
55
snd_opl3_oss_event_input(struct snd_seq_event * ev,int direct,void * private_data,int atomic,int hop)56 static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct,
57 void *private_data, int atomic, int hop)
58 {
59 struct snd_opl3 *opl3 = private_data;
60
61 if (ev->type != SNDRV_SEQ_EVENT_OSS)
62 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset);
63 return 0;
64 }
65
66 /* ------------------------------ */
67
snd_opl3_oss_free_port(void * private_data)68 static void snd_opl3_oss_free_port(void *private_data)
69 {
70 struct snd_opl3 *opl3 = private_data;
71
72 snd_midi_channel_free_set(opl3->oss_chset);
73 }
74
snd_opl3_oss_create_port(struct snd_opl3 * opl3)75 static int snd_opl3_oss_create_port(struct snd_opl3 * opl3)
76 {
77 struct snd_seq_port_callback callbacks;
78 char name[32];
79 int voices, opl_ver;
80
81 voices = (opl3->hardware < OPL3_HW_OPL3) ?
82 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
83 opl3->oss_chset = snd_midi_channel_alloc_set(voices);
84 if (opl3->oss_chset == NULL)
85 return -ENOMEM;
86 opl3->oss_chset->private_data = opl3;
87
88 memset(&callbacks, 0, sizeof(callbacks));
89 callbacks.owner = THIS_MODULE;
90 callbacks.event_input = snd_opl3_oss_event_input;
91 callbacks.private_free = snd_opl3_oss_free_port;
92 callbacks.private_data = opl3;
93
94 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
95 sprintf(name, "OPL%i OSS Port", opl_ver);
96
97 opl3->oss_chset->client = opl3->seq_client;
98 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
99 SNDRV_SEQ_PORT_CAP_WRITE,
100 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
101 SNDRV_SEQ_PORT_TYPE_MIDI_GM |
102 SNDRV_SEQ_PORT_TYPE_HARDWARE |
103 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
104 voices, voices,
105 name);
106 if (opl3->oss_chset->port < 0) {
107 int port;
108 port = opl3->oss_chset->port;
109 snd_midi_channel_free_set(opl3->oss_chset);
110 return port;
111 }
112 return 0;
113 }
114
115 /* ------------------------------ */
116
117 /* register OSS synth */
snd_opl3_init_seq_oss(struct snd_opl3 * opl3,char * name)118 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name)
119 {
120 struct snd_seq_oss_reg *arg;
121 struct snd_seq_device *dev;
122
123 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
124 sizeof(struct snd_seq_oss_reg), &dev) < 0)
125 return;
126
127 opl3->oss_seq_dev = dev;
128 strlcpy(dev->name, name, sizeof(dev->name));
129 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
130 arg->type = SYNTH_TYPE_FM;
131 if (opl3->hardware < OPL3_HW_OPL3) {
132 arg->subtype = FM_TYPE_ADLIB;
133 arg->nvoices = MAX_OPL2_VOICES;
134 } else {
135 arg->subtype = FM_TYPE_OPL3;
136 arg->nvoices = MAX_OPL3_VOICES;
137 }
138 arg->oper = oss_callback;
139 arg->private_data = opl3;
140
141 if (snd_opl3_oss_create_port(opl3)) {
142 /* register to OSS synth table */
143 snd_device_register(opl3->card, dev);
144 }
145 }
146
147 /* unregister */
snd_opl3_free_seq_oss(struct snd_opl3 * opl3)148 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3)
149 {
150 if (opl3->oss_seq_dev) {
151 /* The instance should have been released in prior */
152 opl3->oss_seq_dev = NULL;
153 }
154 }
155
156 /* ------------------------------ */
157
158 /* open OSS sequencer */
snd_opl3_open_seq_oss(struct snd_seq_oss_arg * arg,void * closure)159 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
160 {
161 struct snd_opl3 *opl3 = closure;
162 int err;
163
164 if (snd_BUG_ON(!arg))
165 return -ENXIO;
166
167 if ((err = snd_opl3_synth_setup(opl3)) < 0)
168 return err;
169
170 /* fill the argument data */
171 arg->private_data = opl3;
172 arg->addr.client = opl3->oss_chset->client;
173 arg->addr.port = opl3->oss_chset->port;
174
175 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
176 return err;
177
178 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH;
179 return 0;
180 }
181
182 /* close OSS sequencer */
snd_opl3_close_seq_oss(struct snd_seq_oss_arg * arg)183 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg)
184 {
185 struct snd_opl3 *opl3;
186
187 if (snd_BUG_ON(!arg))
188 return -ENXIO;
189 opl3 = arg->private_data;
190
191 snd_opl3_synth_cleanup(opl3);
192
193 snd_opl3_synth_use_dec(opl3);
194 return 0;
195 }
196
197 /* load patch */
198
199 /* from sound_config.h */
200 #define SBFM_MAXINSTR 256
201
snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg * arg,int format,const char __user * buf,int offs,int count)202 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
203 const char __user *buf, int offs, int count)
204 {
205 struct snd_opl3 *opl3;
206 struct sbi_instrument sbi;
207 char name[32];
208 int err, type;
209
210 if (snd_BUG_ON(!arg))
211 return -ENXIO;
212 opl3 = arg->private_data;
213
214 if (format == FM_PATCH)
215 type = FM_PATCH_OPL2;
216 else if (format == OPL3_PATCH)
217 type = FM_PATCH_OPL3;
218 else
219 return -EINVAL;
220
221 if (count < (int)sizeof(sbi)) {
222 snd_printk(KERN_ERR "FM Error: Patch record too short\n");
223 return -EINVAL;
224 }
225 if (copy_from_user(&sbi, buf, sizeof(sbi)))
226 return -EFAULT;
227
228 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {
229 snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n",
230 sbi.channel);
231 return -EINVAL;
232 }
233
234 memset(name, 0, sizeof(name));
235 sprintf(name, "Chan%d", sbi.channel);
236
237 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL,
238 sbi.operators);
239 if (err < 0)
240 return err;
241
242 return sizeof(sbi);
243 }
244
245 /* ioctl */
snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg * arg,unsigned int cmd,unsigned long ioarg)246 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
247 unsigned long ioarg)
248 {
249 struct snd_opl3 *opl3;
250
251 if (snd_BUG_ON(!arg))
252 return -ENXIO;
253 opl3 = arg->private_data;
254 switch (cmd) {
255 case SNDCTL_FM_LOAD_INSTR:
256 snd_printk(KERN_ERR "OPL3: "
257 "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. "
258 "Fix the program.\n");
259 return -EINVAL;
260
261 case SNDCTL_SYNTH_MEMAVL:
262 return 0x7fffffff;
263
264 case SNDCTL_FM_4OP_ENABLE:
265 // handled automatically by OPL instrument type
266 return 0;
267
268 default:
269 return -EINVAL;
270 }
271 return 0;
272 }
273
274 /* reset device */
snd_opl3_reset_seq_oss(struct snd_seq_oss_arg * arg)275 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)
276 {
277 struct snd_opl3 *opl3;
278
279 if (snd_BUG_ON(!arg))
280 return -ENXIO;
281 opl3 = arg->private_data;
282
283 return 0;
284 }
285