1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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>
27
28MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
29MODULE_DESCRIPTION("OPL4 driver");
30MODULE_LICENSE("GPL");
31
32static void inline snd_opl4_wait(struct snd_opl4 *opl4)
33{
34 int timeout = 10;
35 while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
36 ;
37}
38
39void snd_opl4_write(struct snd_opl4 *opl4, u8 reg, u8 value)
40{
41 snd_opl4_wait(opl4);
42 outb(reg, opl4->pcm_port);
43
44 snd_opl4_wait(opl4);
45 outb(value, opl4->pcm_port + 1);
46}
47
48EXPORT_SYMBOL(snd_opl4_write);
49
50u8 snd_opl4_read(struct snd_opl4 *opl4, u8 reg)
51{
52 snd_opl4_wait(opl4);
53 outb(reg, opl4->pcm_port);
54
55 snd_opl4_wait(opl4);
56 return inb(opl4->pcm_port + 1);
57}
58
59EXPORT_SYMBOL(snd_opl4_read);
60
61void snd_opl4_read_memory(struct snd_opl4 *opl4, char *buf, int offset, int size)
62{
63 unsigned long flags;
64 u8 memcfg;
65
66 spin_lock_irqsave(&opl4->reg_lock, flags);
67
68 memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
69 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
70
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);
74
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);
79
80 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
81
82 spin_unlock_irqrestore(&opl4->reg_lock, flags);
83}
84
85EXPORT_SYMBOL(snd_opl4_read_memory);
86
87void snd_opl4_write_memory(struct snd_opl4 *opl4, const char *buf, int offset, int size)
88{
89 unsigned long flags;
90 u8 memcfg;
91
92 spin_lock_irqsave(&opl4->reg_lock, flags);
93
94 memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
95 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
96
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);
100
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);
105
106 snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
107
108 spin_unlock_irqrestore(&opl4->reg_lock, flags);
109}
110
111EXPORT_SYMBOL(snd_opl4_write_memory);
112
113static void snd_opl4_enable_opl4(struct snd_opl4 *opl4)
114{
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);
121}
122
123static int snd_opl4_detect(struct snd_opl4 *opl4)
124{
125 u8 id1, id2;
126
127 snd_opl4_enable_opl4(opl4);
128
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;
140 }
141
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;
149
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;
154}
155
156#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
157static void snd_opl4_seq_dev_free(struct snd_seq_device *seq_dev)
158{
159 struct snd_opl4 *opl4 = seq_dev->private_data;
160 opl4->seq_dev = NULL;
161}
162
163static int snd_opl4_create_seq_dev(struct snd_opl4 *opl4, int seq_device)
164{
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;
172 }
173 return 0;
174}
175#endif
176
177static void snd_opl4_free(struct snd_opl4 *opl4)
178{
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);
185}
186
187static int snd_opl4_dev_free(struct snd_device *device)
188{
189 struct snd_opl4 *opl4 = device->device_data;
190 snd_opl4_free(opl4);
191 return 0;
192}
193
194int 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)
198{
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
204 };
205
206 if (ropl3)
207 *ropl3 = NULL;
208 if (ropl4)
209 *ropl4 = NULL;
210
211 opl4 = kzalloc(sizeof(*opl4), GFP_KERNEL);
212 if (!opl4)
213 return -ENOMEM;
214
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;
221 }
222
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);
228
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;
234 }
235
236 err = snd_device_new(card, SNDRV_DEV_CODEC, opl4, &ops);
237 if (err < 0) {
238 snd_opl4_free(opl4);
239 return err;
240 }
241
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;
246 }
247
248
249 snd_opl4_enable_opl4(opl4);
250
251 snd_opl4_create_mixer(opl4);
252#ifdef CONFIG_PROC_FS
253 snd_opl4_create_proc(opl4);
254#endif
255
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
261
262 if (ropl3)
263 *ropl3 = opl3;
264 if (ropl4)
265 *ropl4 = opl4;
266 return 0;
267}
268
269EXPORT_SYMBOL(snd_opl4_create);
270
271static int __init alsa_opl4_init(void)
272{
273 return 0;
274}
275
276static void __exit alsa_opl4_exit(void)
277{
278}
279
280module_init(alsa_opl4_init)
281module_exit(alsa_opl4_exit)
282
