1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
/*
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
* Uros Bizjak <uros@kss-loka.si>
*
* Lowlevel routines for control of Sound Blaster cards
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/initval.h>
#include <asm/io.h>
#include <asm/dma.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
MODULE_LICENSE("GPL");
#define BUSY_LOOPS 100000
#undef IO_DEBUG
int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
{
int i;
#ifdef IO_DEBUG
snd_printk(KERN_DEBUG "command 0x%x\n", val);
#endif
for (i = BUSY_LOOPS; i; i--)
if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
outb(val, SBP(chip, COMMAND));
return 1;
}
snd_printd("%s [0x%lx]: timeout (0x%x)\n", __FUNCTION__, chip->port, val);
return 0;
}
int snd_sbdsp_get_byte(struct snd_sb *chip)
{
int val;
int i;
for (i = BUSY_LOOPS; i; i--) {
if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
val = inb(SBP(chip, READ));
#ifdef IO_DEBUG
snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
#endif
return val;
}
}
snd_printd("%s [0x%lx]: timeout\n", __FUNCTION__, chip->port);
return -ENODEV;
}
int snd_sbdsp_reset(struct snd_sb *chip)
{
int i;
outb(1, SBP(chip, RESET));
udelay(10);
outb(0, SBP(chip, RESET));
udelay(30);
for (i = BUSY_LOOPS; i; i--)
if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
if (inb(SBP(chip, READ)) == 0xaa)
return 0;
else
break;
}
snd_printdd("%s [0x%lx] failed...\n", __FUNCTION__, chip->port);
return -ENODEV;
}
static int snd_sbdsp_version(struct snd_sb * chip)
{
unsigned int result = -ENODEV;
snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
result = (short) snd_sbdsp_get_byte(chip) << 8;
result |= (short) snd_sbdsp_get_byte(chip);
return result;
}
static int snd_sbdsp_probe(struct snd_sb * chip)
{
int version;
int major, minor;
char *str;
unsigned long flags;
/*
* initialization sequence
*/
spin_lock_irqsave(&chip->reg_lock, flags);
if (snd_sbdsp_reset(chip) < 0) {
spin_unlock_irqrestore(&chip->reg_lock, flags);
return -ENODEV;
}
version = snd_sbdsp_version(chip);
if (version < 0) {
spin_unlock_irqrestore(&chip->reg_lock, flags);
return -ENODEV;
}
spin_unlock_irqrestore(&chip->reg_lock, flags);
major = version >> 8;
minor = version & 0xff;
snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
chip->port, major, minor);
switch (chip->hardware) {
case SB_HW_AUTO:
switch (major) {
case 1:
chip->hardware = SB_HW_10;
str = "1.0";
break;
case 2:
if (minor) {
chip->hardware = SB_HW_201;
str = "2.01+";
} else {
chip->hardware = SB_HW_20;
str = "2.0";
}
break;
case 3:
chip->hardware = SB_HW_PRO;
str = "Pro";
break;
case 4:
chip->hardware = SB_HW_16;
str = "16";
break;
default:
snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
chip->port, major, minor);
return -ENODEV;
}
break;
case SB_HW_ALS100:
str = "16 (ALS-100)";
break;
case SB_HW_ALS4000:
str = "16 (ALS-4000)";
break;
case SB_HW_DT019X:
str = "(DT019X/ALS007)";
break;
default:
return -ENODEV;
}
sprintf(chip->name, "Sound Blaster %s", str);
chip->version = (major << 8) | minor;
return 0;
}
static int snd_sbdsp_free(struct snd_sb *chip)
{
if (chip->res_port)
release_and_free_resource(chip->res_port);
if (chip->irq >= 0)
free_irq(chip->irq, (void *) chip);
#ifdef CONFIG_ISA
if (chip->dma8 >= 0) {
disable_dma(chip->dma8);
free_dma(chip->dma8);
}
if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
disable_dma(chip->dma16);
free_dma(chip->dma16);
}
#endif
kfree(chip);
return 0;
}
static int snd_sbdsp_dev_free(struct snd_device *device)
{
struct snd_sb *chip = device->device_data;
return snd_sbdsp_free(chip);
}
int snd_sbdsp_create(struct snd_card *card,
unsigned long port,
int irq,
irqreturn_t (*irq_handler)(int, void *, struct pt_regs *),
int dma8,
int dma16,
unsigned short hardware,
struct snd_sb **r_chip)
{
struct snd_sb *chip;
int err;
static struct snd_device_ops ops = {
.dev_free = snd_sbdsp_dev_free,
};
snd_assert(r_chip != NULL, return -EINVAL);
*r_chip = NULL;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
spin_lock_init(&chip->reg_lock);
spin_lock_init(&chip->open_lock);
spin_lock_init(&chip->midi_input_lock);
spin_lock_init(&chip->mixer_lock);
chip->irq = -1;
chip->dma8 = -1;
chip->dma16 = -1;
chip->port = port;
if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ?
IRQF_DISABLED | IRQF_SHARED : IRQF_DISABLED,
"SoundBlaster", (void *) chip)) {
snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
snd_sbdsp_free(chip);
return -EBUSY;
}
chip->irq = irq;
if (hardware == SB_HW_ALS4000)
goto __skip_allocation;
if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
snd_sbdsp_free(chip);
return -EBUSY;
}
#ifdef CONFIG_ISA
if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
snd_sbdsp_free(chip);
return -EBUSY;
}
chip->dma8 = dma8;
if (dma16 >= 0) {
if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
/* no duplex */
dma16 = -1;
} else if (request_dma(dma16, "SoundBlaster - 16bit")) {
snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
snd_sbdsp_free(chip);
return -EBUSY;
}
}
chip->dma16 = dma16;
#endif
__skip_allocation:
chip->card = card;
chip->hardware = hardware;
if ((err = snd_sbdsp_probe(chip)) < 0) {
snd_sbdsp_free(chip);
return err;
}
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
snd_sbdsp_free(chip);
return err;
}
*r_chip = chip;
return 0;
}
EXPORT_SYMBOL(snd_sbdsp_command);
EXPORT_SYMBOL(snd_sbdsp_get_byte);
EXPORT_SYMBOL(snd_sbdsp_reset);
EXPORT_SYMBOL(snd_sbdsp_create);
/* sb_mixer.c */
EXPORT_SYMBOL(snd_sbmixer_write);
EXPORT_SYMBOL(snd_sbmixer_read);
EXPORT_SYMBOL(snd_sbmixer_new);
EXPORT_SYMBOL(snd_sbmixer_add_ctl);
#ifdef CONFIG_PM
EXPORT_SYMBOL(snd_sbmixer_suspend);
EXPORT_SYMBOL(snd_sbmixer_resume);
#endif
/*
* INIT part
*/
static int __init alsa_sb_common_init(void)
{
return 0;
}
static void __exit alsa_sb_common_exit(void)
{
}
module_init(alsa_sb_common_init)
module_exit(alsa_sb_common_exit)
|
