[ALSA] opl4 - Move EXPORT_SYMBOL() to adjacent to each function
[linux-2.6.git] / sound / drivers / opl4 / opl4_lib.c
1 /*
2  * Functions for accessing OPL4 devices
3  * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
18  */
19
20 #include "opl4_local.h"
21 #include <sound/initval.h>
22 #include <linux/ioport.h>
23 #include <linux/init.h>
24 #include <asm/io.h>
25
26 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
27 MODULE_DESCRIPTION("OPL4 driver");
28 MODULE_LICENSE("GPL");
29
30 static void inline snd_opl4_wait(struct snd_opl4 *opl4)
31 {
32         int timeout = 10;
33         while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
34                 ;
35 }
36
37 void snd_opl4_write(struct snd_opl4 *opl4, u8 reg, u8 value)
38 {
39         snd_opl4_wait(opl4);
40         outb(reg, opl4->pcm_port);
41
42         snd_opl4_wait(opl4);
43         outb(value, opl4->pcm_port + 1);
44 }
45
46 EXPORT_SYMBOL(snd_opl4_write);
47
48 u8 snd_opl4_read(struct snd_opl4 *opl4, u8 reg)
49 {
50         snd_opl4_wait(opl4);
51         outb(reg, opl4->pcm_port);
52
53         snd_opl4_wait(opl4);
54         return inb(opl4->pcm_port + 1);
55 }
56
57 EXPORT_SYMBOL(snd_opl4_read);
58
59 void snd_opl4_read_memory(struct snd_opl4 *opl4, char *buf, int offset, int size)
60 {
61         unsigned long flags;
62         u8 memcfg;
63
64         spin_lock_irqsave(&opl4->reg_lock, flags);
65
66         memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
67         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
68
69         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
70         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
71         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
72
73         snd_opl4_wait(opl4);
74         outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
75         snd_opl4_wait(opl4);
76         insb(opl4->pcm_port + 1, buf, size);
77
78         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
79
80         spin_unlock_irqrestore(&opl4->reg_lock, flags);
81 }
82
83 EXPORT_SYMBOL(snd_opl4_read_memory);
84
85 void snd_opl4_write_memory(struct snd_opl4 *opl4, const char *buf, int offset, int size)
86 {
87         unsigned long flags;
88         u8 memcfg;
89
90         spin_lock_irqsave(&opl4->reg_lock, flags);
91
92         memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
93         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
94
95         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
96         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
97         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
98
99         snd_opl4_wait(opl4);
100         outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
101         snd_opl4_wait(opl4);
102         outsb(opl4->pcm_port + 1, buf, size);
103
104         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
105
106         spin_unlock_irqrestore(&opl4->reg_lock, flags);
107 }
108
109 EXPORT_SYMBOL(snd_opl4_write_memory);
110
111 static void snd_opl4_enable_opl4(struct snd_opl4 *opl4)
112 {
113         outb(OPL3_REG_MODE, opl4->fm_port + 2);
114         inb(opl4->fm_port);
115         inb(opl4->fm_port);
116         outb(OPL3_OPL3_ENABLE | OPL3_OPL4_ENABLE, opl4->fm_port + 3);
117         inb(opl4->fm_port);
118         inb(opl4->fm_port);
119 }
120
121 static int snd_opl4_detect(struct snd_opl4 *opl4)
122 {
123         u8 id1, id2;
124
125         snd_opl4_enable_opl4(opl4);
126
127         id1 = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
128         snd_printdd("OPL4[02]=%02x\n", id1);
129         switch (id1 & OPL4_DEVICE_ID_MASK) {
130         case 0x20:
131                 opl4->hardware = OPL3_HW_OPL4;
132                 break;
133         case 0x40:
134                 opl4->hardware = OPL3_HW_OPL4_ML;
135                 break;
136         default:
137                 return -ENODEV;
138         }
139
140         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x00);
141         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0xff);
142         id1 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_FM);
143         id2 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_PCM);
144         snd_printdd("OPL4 id1=%02x id2=%02x\n", id1, id2);
145         if (id1 != 0x00 || id2 != 0xff)
146                 return -ENODEV;
147
148         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x3f);
149         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0x3f);
150         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, 0x00);
151         return 0;
152 }
153
154 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
155 static void snd_opl4_seq_dev_free(struct snd_seq_device *seq_dev)
156 {
157         struct snd_opl4 *opl4 = seq_dev->private_data;
158         opl4->seq_dev = NULL;
159 }
160
161 static int snd_opl4_create_seq_dev(struct snd_opl4 *opl4, int seq_device)
162 {
163         opl4->seq_dev_num = seq_device;
164         if (snd_seq_device_new(opl4->card, seq_device, SNDRV_SEQ_DEV_ID_OPL4,
165                                sizeof(struct snd_opl4 *), &opl4->seq_dev) >= 0) {
166                 strcpy(opl4->seq_dev->name, "OPL4 Wavetable");
167                 *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(opl4->seq_dev) = opl4;
168                 opl4->seq_dev->private_data = opl4;
169                 opl4->seq_dev->private_free = snd_opl4_seq_dev_free;
170         }
171         return 0;
172 }
173 #endif
174
175 static void snd_opl4_free(struct snd_opl4 *opl4)
176 {
177 #ifdef CONFIG_PROC_FS
178         snd_opl4_free_proc(opl4);
179 #endif
180         release_and_free_resource(opl4->res_fm_port);
181         release_and_free_resource(opl4->res_pcm_port);
182         kfree(opl4);
183 }
184
185 static int snd_opl4_dev_free(struct snd_device *device)
186 {
187         struct snd_opl4 *opl4 = device->device_data;
188         snd_opl4_free(opl4);
189         return 0;
190 }
191
192 int snd_opl4_create(struct snd_card *card,
193                     unsigned long fm_port, unsigned long pcm_port,
194                     int seq_device,
195                     struct snd_opl3 **ropl3, struct snd_opl4 **ropl4)
196 {
197         struct snd_opl4 *opl4;
198         struct snd_opl3 *opl3;
199         int err;
200         static struct snd_device_ops ops = {
201                 .dev_free = snd_opl4_dev_free
202         };
203
204         if (ropl3)
205                 *ropl3 = NULL;
206         if (ropl4)
207                 *ropl4 = NULL;
208
209         opl4 = kzalloc(sizeof(*opl4), GFP_KERNEL);
210         if (!opl4)
211                 return -ENOMEM;
212
213         opl4->res_fm_port = request_region(fm_port, 8, "OPL4 FM");
214         opl4->res_pcm_port = request_region(pcm_port, 8, "OPL4 PCM/MIX");
215         if (!opl4->res_fm_port || !opl4->res_pcm_port) {
216                 snd_printk(KERN_ERR "opl4: can't grab ports 0x%lx, 0x%lx\n", fm_port, pcm_port);
217                 snd_opl4_free(opl4);
218                 return -EBUSY;
219         }
220
221         opl4->card = card;
222         opl4->fm_port = fm_port;
223         opl4->pcm_port = pcm_port;
224         spin_lock_init(&opl4->reg_lock);
225         mutex_init(&opl4->access_mutex);
226
227         err = snd_opl4_detect(opl4);
228         if (err < 0) {
229                 snd_opl4_free(opl4);
230                 snd_printd("OPL4 chip not detected at %#lx/%#lx\n", fm_port, pcm_port);
231                 return err;
232         }
233
234         err = snd_device_new(card, SNDRV_DEV_CODEC, opl4, &ops);
235         if (err < 0) {
236                 snd_opl4_free(opl4);
237                 return err;
238         }
239
240         err = snd_opl3_create(card, fm_port, fm_port + 2, opl4->hardware, 1, &opl3);
241         if (err < 0) {
242                 snd_device_free(card, opl4);
243                 return err;
244         }
245
246         /* opl3 initialization disabled opl4, so reenable */
247         snd_opl4_enable_opl4(opl4);
248
249         snd_opl4_create_mixer(opl4);
250 #ifdef CONFIG_PROC_FS
251         snd_opl4_create_proc(opl4);
252 #endif
253
254 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
255         opl4->seq_client = -1;
256         if (opl4->hardware < OPL3_HW_OPL4_ML)
257                 snd_opl4_create_seq_dev(opl4, seq_device);
258 #endif
259
260         if (ropl3)
261                 *ropl3 = opl3;
262         if (ropl4)
263                 *ropl4 = opl4;
264         return 0;
265 }
266
267 EXPORT_SYMBOL(snd_opl4_create);
268
269 static int __init alsa_opl4_init(void)
270 {
271         return 0;
272 }
273
274 static void __exit alsa_opl4_exit(void)
275 {
276 }
277
278 module_init(alsa_opl4_init)
279 module_exit(alsa_opl4_exit)