2 * Functions for accessing OPL4 devices
3 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
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.
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.
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
20 #include "opl4_local.h"
21 #include <sound/initval.h>
22 #include <linux/ioport.h>
23 #include <linux/init.h>
26 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
27 MODULE_DESCRIPTION("OPL4 driver");
28 MODULE_LICENSE("GPL");
29 MODULE_CLASSES("{sound}");
31 static void inline snd_opl4_wait(opl4_t *opl4)
34 while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
38 void snd_opl4_write(opl4_t *opl4, u8 reg, u8 value)
42 spin_lock_irqsave(&opl4->reg_lock, flags);
45 outb(reg, opl4->pcm_port);
48 outb(value, opl4->pcm_port + 1);
50 spin_unlock_irqrestore(&opl4->reg_lock, flags);
53 u8 snd_opl4_read(opl4_t *opl4, u8 reg)
58 spin_lock_irqsave(&opl4->reg_lock, flags);
61 outb(reg, opl4->pcm_port);
64 value = inb(opl4->pcm_port + 1);
66 spin_unlock_irqrestore(&opl4->reg_lock, flags);
70 void snd_opl4_read_memory(opl4_t *opl4, char *buf, int offset, int size)
72 u8 memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
73 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
75 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
76 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
77 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
78 for (; size > 0; size--)
79 *buf++ = snd_opl4_read(opl4, OPL4_REG_MEMORY_DATA);
81 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
84 void snd_opl4_write_memory(opl4_t *opl4, const char *buf, int offset, int size)
86 u8 memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
87 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
89 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
90 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
91 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
92 for (; size > 0; size--)
93 snd_opl4_write(opl4, OPL4_REG_MEMORY_DATA, *buf++);
95 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
98 static void snd_opl4_enable_opl4(opl4_t *opl4)
100 outb(OPL3_REG_MODE, opl4->fm_port + 2);
103 outb(OPL3_OPL3_ENABLE | OPL3_OPL4_ENABLE, opl4->fm_port + 3);
108 static int snd_opl4_detect(opl4_t *opl4)
112 snd_opl4_enable_opl4(opl4);
114 id1 = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
115 snd_printdd("OPL4[02]=%02x\n", id1);
116 switch (id1 & OPL4_DEVICE_ID_MASK) {
118 opl4->hardware = OPL3_HW_OPL4;
121 opl4->hardware = OPL3_HW_OPL4_ML;
127 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x00);
128 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0xff);
129 id1 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_FM);
130 id2 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_PCM);
131 snd_printdd("OPL4 id1=%02x id2=%02x\n", id1, id2);
132 if (id1 != 0x00 || id2 != 0xff)
135 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x3f);
136 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0x3f);
137 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, 0x00);
141 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
142 static void snd_opl4_seq_dev_free(snd_seq_device_t *seq_dev)
144 opl4_t *opl4 = snd_magic_cast(opl4_t, seq_dev->private_data, return);
145 opl4->seq_dev = NULL;
148 static int snd_opl4_create_seq_dev(opl4_t *opl4, int seq_device)
150 opl4->seq_dev_num = seq_device;
151 if (snd_seq_device_new(opl4->card, seq_device, SNDRV_SEQ_DEV_ID_OPL4,
152 sizeof(opl4_t *), &opl4->seq_dev) >= 0) {
153 strcpy(opl4->seq_dev->name, "OPL4 Wavetable");
154 *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(opl4->seq_dev) = opl4;
155 opl4->seq_dev->private_data = opl4;
156 opl4->seq_dev->private_free = snd_opl4_seq_dev_free;
162 static void snd_opl4_free(opl4_t *opl4)
164 #ifdef CONFIG_PROC_FS
165 snd_opl4_free_proc(opl4);
167 if (opl4->res_fm_port) {
168 release_resource(opl4->res_fm_port);
169 kfree_nocheck(opl4->res_fm_port);
171 if (opl4->res_pcm_port) {
172 release_resource(opl4->res_pcm_port);
173 kfree_nocheck(opl4->res_pcm_port);
175 snd_magic_kfree(opl4);
178 static int snd_opl4_dev_free(snd_device_t *device)
180 opl4_t *opl4 = snd_magic_cast(opl4_t, device->device_data, return -ENXIO);
185 int snd_opl4_create(snd_card_t *card,
186 unsigned long fm_port, unsigned long pcm_port,
188 opl3_t **ropl3, opl4_t **ropl4)
193 static snd_device_ops_t ops = {
194 .dev_free = snd_opl4_dev_free
202 opl4 = snd_magic_kcalloc(opl4_t, 0, GFP_KERNEL);
206 opl4->res_fm_port = request_region(fm_port, 8, "OPL4 FM");
207 opl4->res_pcm_port = request_region(pcm_port, 8, "OPL4 PCM/MIX");
208 if (!opl4->res_fm_port || !opl4->res_pcm_port) {
209 snd_printk(KERN_ERR "opl4: can't grab ports 0x%lx, 0x%lx\n", fm_port, pcm_port);
215 opl4->fm_port = fm_port;
216 opl4->pcm_port = pcm_port;
217 spin_lock_init(&opl4->reg_lock);
218 init_MUTEX(&opl4->access_mutex);
220 err = snd_opl4_detect(opl4);
223 snd_printd("OPL4 chip not detected at %#lx/%#lx\n", fm_port, pcm_port);
227 err = snd_opl3_create(card, fm_port, fm_port + 2, opl4->hardware, 1, &opl3);
233 /* opl3 initialization disabled opl4, so reenable */
234 snd_opl4_enable_opl4(opl4);
236 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, opl4, &ops);
238 snd_device_free(card, opl3);
243 snd_opl4_create_mixer(opl4);
244 #ifdef CONFIG_PROC_FS
245 snd_opl4_create_proc(opl4);
248 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
249 opl4->seq_client = -1;
250 if (opl4->hardware < OPL3_HW_OPL4_ML)
251 snd_opl4_create_seq_dev(opl4, seq_device);
261 EXPORT_SYMBOL(snd_opl4_write);
262 EXPORT_SYMBOL(snd_opl4_read);
263 EXPORT_SYMBOL(snd_opl4_write_memory);
264 EXPORT_SYMBOL(snd_opl4_read_memory);
265 EXPORT_SYMBOL(snd_opl4_create);
267 static int __init alsa_opl4_init(void)
272 static void __exit alsa_opl4_exit(void)
276 module_init(alsa_opl4_init)
277 module_exit(alsa_opl4_exit)