Add linux-next specific files for 20110831
[linux-2.6/next.git] / sound / drivers / opl4 / opl4_lib.c
blobb953fb4aa298031a294a7b673a38f27037438f92
1 /*
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/slab.h>
24 #include <linux/init.h>
25 #include <linux/module.h>
26 #include <asm/io.h>
28 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
29 MODULE_DESCRIPTION("OPL4 driver");
30 MODULE_LICENSE("GPL");
32 static void inline snd_opl4_wait(struct snd_opl4 *opl4)
34 int timeout = 10;
35 while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
39 void snd_opl4_write(struct snd_opl4 *opl4, u8 reg, u8 value)
41 snd_opl4_wait(opl4);
42 outb(reg, opl4->pcm_port);
44 snd_opl4_wait(opl4);
45 outb(value, opl4->pcm_port + 1);
48 EXPORT_SYMBOL(snd_opl4_write);
50 u8 snd_opl4_read(struct snd_opl4 *opl4, u8 reg)
52 snd_opl4_wait(opl4);
53 outb(reg, opl4->pcm_port);
55 snd_opl4_wait(opl4);
56 return inb(opl4->pcm_port + 1);
59 EXPORT_SYMBOL(snd_opl4_read);
61 void snd_opl4_read_memory(struct snd_opl4 *opl4, char *buf, int offset, int size)
63 unsigned long flags;
64 u8 memcfg;
66 spin_lock_irqsave(&opl4->reg_lock, flags);
68 memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
69 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
71 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
72 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
73 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
75 snd_opl4_wait(opl4);
76 outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
77 snd_opl4_wait(opl4);
78 insb(opl4->pcm_port + 1, buf, size);
80 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
82 spin_unlock_irqrestore(&opl4->reg_lock, flags);
85 EXPORT_SYMBOL(snd_opl4_read_memory);
87 void snd_opl4_write_memory(struct snd_opl4 *opl4, const char *buf, int offset, int size)
89 unsigned long flags;
90 u8 memcfg;
92 spin_lock_irqsave(&opl4->reg_lock, flags);
94 memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
95 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
97 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
98 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
99 snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
101 snd_opl4_wait(opl4);
102 outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
103 snd_opl4_wait(opl4);
104 outsb(opl4->pcm_port + 1, buf, size);
106 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
108 spin_unlock_irqrestore(&opl4->reg_lock, flags);
111 EXPORT_SYMBOL(snd_opl4_write_memory);
113 static void snd_opl4_enable_opl4(struct snd_opl4 *opl4)
115 outb(OPL3_REG_MODE, opl4->fm_port + 2);
116 inb(opl4->fm_port);
117 inb(opl4->fm_port);
118 outb(OPL3_OPL3_ENABLE | OPL3_OPL4_ENABLE, opl4->fm_port + 3);
119 inb(opl4->fm_port);
120 inb(opl4->fm_port);
123 static int snd_opl4_detect(struct snd_opl4 *opl4)
125 u8 id1, id2;
127 snd_opl4_enable_opl4(opl4);
129 id1 = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
130 snd_printdd("OPL4[02]=%02x\n", id1);
131 switch (id1 & OPL4_DEVICE_ID_MASK) {
132 case 0x20:
133 opl4->hardware = OPL3_HW_OPL4;
134 break;
135 case 0x40:
136 opl4->hardware = OPL3_HW_OPL4_ML;
137 break;
138 default:
139 return -ENODEV;
142 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x00);
143 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0xff);
144 id1 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_FM);
145 id2 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_PCM);
146 snd_printdd("OPL4 id1=%02x id2=%02x\n", id1, id2);
147 if (id1 != 0x00 || id2 != 0xff)
148 return -ENODEV;
150 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x3f);
151 snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0x3f);
152 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, 0x00);
153 return 0;
156 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
157 static void snd_opl4_seq_dev_free(struct snd_seq_device *seq_dev)
159 struct snd_opl4 *opl4 = seq_dev->private_data;
160 opl4->seq_dev = NULL;
163 static int snd_opl4_create_seq_dev(struct snd_opl4 *opl4, int seq_device)
165 opl4->seq_dev_num = seq_device;
166 if (snd_seq_device_new(opl4->card, seq_device, SNDRV_SEQ_DEV_ID_OPL4,
167 sizeof(struct snd_opl4 *), &opl4->seq_dev) >= 0) {
168 strcpy(opl4->seq_dev->name, "OPL4 Wavetable");
169 *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(opl4->seq_dev) = opl4;
170 opl4->seq_dev->private_data = opl4;
171 opl4->seq_dev->private_free = snd_opl4_seq_dev_free;
173 return 0;
175 #endif
177 static void snd_opl4_free(struct snd_opl4 *opl4)
179 #ifdef CONFIG_PROC_FS
180 snd_opl4_free_proc(opl4);
181 #endif
182 release_and_free_resource(opl4->res_fm_port);
183 release_and_free_resource(opl4->res_pcm_port);
184 kfree(opl4);
187 static int snd_opl4_dev_free(struct snd_device *device)
189 struct snd_opl4 *opl4 = device->device_data;
190 snd_opl4_free(opl4);
191 return 0;
194 int snd_opl4_create(struct snd_card *card,
195 unsigned long fm_port, unsigned long pcm_port,
196 int seq_device,
197 struct snd_opl3 **ropl3, struct snd_opl4 **ropl4)
199 struct snd_opl4 *opl4;
200 struct snd_opl3 *opl3;
201 int err;
202 static struct snd_device_ops ops = {
203 .dev_free = snd_opl4_dev_free
206 if (ropl3)
207 *ropl3 = NULL;
208 if (ropl4)
209 *ropl4 = NULL;
211 opl4 = kzalloc(sizeof(*opl4), GFP_KERNEL);
212 if (!opl4)
213 return -ENOMEM;
215 opl4->res_fm_port = request_region(fm_port, 8, "OPL4 FM");
216 opl4->res_pcm_port = request_region(pcm_port, 8, "OPL4 PCM/MIX");
217 if (!opl4->res_fm_port || !opl4->res_pcm_port) {
218 snd_printk(KERN_ERR "opl4: can't grab ports 0x%lx, 0x%lx\n", fm_port, pcm_port);
219 snd_opl4_free(opl4);
220 return -EBUSY;
223 opl4->card = card;
224 opl4->fm_port = fm_port;
225 opl4->pcm_port = pcm_port;
226 spin_lock_init(&opl4->reg_lock);
227 mutex_init(&opl4->access_mutex);
229 err = snd_opl4_detect(opl4);
230 if (err < 0) {
231 snd_opl4_free(opl4);
232 snd_printd("OPL4 chip not detected at %#lx/%#lx\n", fm_port, pcm_port);
233 return err;
236 err = snd_device_new(card, SNDRV_DEV_CODEC, opl4, &ops);
237 if (err < 0) {
238 snd_opl4_free(opl4);
239 return err;
242 err = snd_opl3_create(card, fm_port, fm_port + 2, opl4->hardware, 1, &opl3);
243 if (err < 0) {
244 snd_device_free(card, opl4);
245 return err;
248 /* opl3 initialization disabled opl4, so reenable */
249 snd_opl4_enable_opl4(opl4);
251 snd_opl4_create_mixer(opl4);
252 #ifdef CONFIG_PROC_FS
253 snd_opl4_create_proc(opl4);
254 #endif
256 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
257 opl4->seq_client = -1;
258 if (opl4->hardware < OPL3_HW_OPL4_ML)
259 snd_opl4_create_seq_dev(opl4, seq_device);
260 #endif
262 if (ropl3)
263 *ropl3 = opl3;
264 if (ropl4)
265 *ropl4 = opl4;
266 return 0;
269 EXPORT_SYMBOL(snd_opl4_create);
271 static int __init alsa_opl4_init(void)
273 return 0;
276 static void __exit alsa_opl4_exit(void)
280 module_init(alsa_opl4_init)
281 module_exit(alsa_opl4_exit)