2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Uros Bizjak <uros@kss-loka.si>
5 * Lowlevel routines for control of Sound Blaster cards
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <sound/driver.h>
24 #include <linux/delay.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/slab.h>
28 #include <linux/ioport.h>
29 #include <sound/core.h>
31 #include <sound/initval.h>
38 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
39 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
40 MODULE_LICENSE("GPL");
41 MODULE_CLASSES("{sound}");
43 #define BUSY_LOOPS 100000
47 int snd_sbdsp_command(sb_t *chip, unsigned char val)
51 snd_printk("command 0x%x\n", val);
53 for (i = BUSY_LOOPS; i; i--)
54 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
55 outb(val, SBP(chip, COMMAND));
58 snd_printd("%s [0x%lx]: timeout (0x%x)\n", __FUNCTION__, chip->port, val);
62 int snd_sbdsp_get_byte(sb_t *chip)
66 for (i = BUSY_LOOPS; i; i--) {
67 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
68 val = inb(SBP(chip, READ));
70 snd_printk("get_byte 0x%x\n", val);
75 snd_printd("%s [0x%lx]: timeout\n", __FUNCTION__, chip->port);
79 int snd_sbdsp_reset(sb_t *chip)
83 outb(1, SBP(chip, RESET));
85 outb(0, SBP(chip, RESET));
87 for (i = BUSY_LOOPS; i; i--)
88 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
89 if (inb(SBP(chip, READ)) == 0xaa)
94 snd_printdd("%s [0x%lx] failed...\n", __FUNCTION__, chip->port);
98 int snd_sbdsp_version(sb_t * chip)
100 unsigned int result = -ENODEV;
102 snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
103 result = (short) snd_sbdsp_get_byte(chip) << 8;
104 result |= (short) snd_sbdsp_get_byte(chip);
108 static int snd_sbdsp_probe(sb_t * chip)
116 * initialization sequence
119 spin_lock_irqsave(&chip->reg_lock, flags);
120 if (snd_sbdsp_reset(chip) < 0) {
121 spin_unlock_irqrestore(&chip->reg_lock, flags);
124 version = snd_sbdsp_version(chip);
126 spin_unlock_irqrestore(&chip->reg_lock, flags);
129 spin_unlock_irqrestore(&chip->reg_lock, flags);
130 major = version >> 8;
131 minor = version & 0xff;
132 snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
133 chip->port, major, minor);
135 switch (chip->hardware) {
139 chip->hardware = SB_HW_10;
144 chip->hardware = SB_HW_201;
147 chip->hardware = SB_HW_20;
152 chip->hardware = SB_HW_PRO;
156 chip->hardware = SB_HW_16;
160 snd_printk("SB [0x%lx]: unknown DSP chip version %i.%i\n",
161 chip->port, major, minor);
166 str = "16 (ALS-100)";
169 str = "16 (ALS-4000)";
172 str = "(DT019X/ALS007)";
177 sprintf(chip->name, "Sound Blaster %s", str);
178 chip->version = (major << 8) | minor;
182 static int snd_sbdsp_free(sb_t *chip)
184 if (chip->res_port) {
185 release_resource(chip->res_port);
186 kfree_nocheck(chip->res_port);
189 free_irq(chip->irq, (void *) chip);
191 if (chip->dma8 >= 0) {
192 disable_dma(chip->dma8);
193 free_dma(chip->dma8);
195 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
196 disable_dma(chip->dma16);
197 free_dma(chip->dma16);
200 snd_magic_kfree(chip);
204 static int snd_sbdsp_dev_free(snd_device_t *device)
206 sb_t *chip = snd_magic_cast(sb_t, device->device_data, return -ENXIO);
207 return snd_sbdsp_free(chip);
210 int snd_sbdsp_create(snd_card_t *card,
213 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *),
216 unsigned short hardware,
221 static snd_device_ops_t ops = {
222 .dev_free = snd_sbdsp_dev_free,
225 snd_assert(r_chip != NULL, return -EINVAL);
227 chip = snd_magic_kcalloc(sb_t, 0, GFP_KERNEL);
230 spin_lock_init(&chip->reg_lock);
231 spin_lock_init(&chip->open_lock);
232 spin_lock_init(&chip->midi_input_lock);
233 spin_lock_init(&chip->mixer_lock);
239 if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ?
240 SA_INTERRUPT | SA_SHIRQ : SA_INTERRUPT,
241 "SoundBlaster", (void *) chip)) {
242 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
243 snd_sbdsp_free(chip);
248 if (hardware == SB_HW_ALS4000)
249 goto __skip_allocation;
251 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
252 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
253 snd_sbdsp_free(chip);
258 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
259 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
260 snd_sbdsp_free(chip);
265 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
268 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
269 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
270 snd_sbdsp_free(chip);
279 chip->hardware = hardware;
280 if ((err = snd_sbdsp_probe(chip)) < 0) {
281 snd_sbdsp_free(chip);
284 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
285 snd_sbdsp_free(chip);
292 EXPORT_SYMBOL(snd_sbdsp_command);
293 EXPORT_SYMBOL(snd_sbdsp_get_byte);
294 EXPORT_SYMBOL(snd_sbdsp_reset);
295 EXPORT_SYMBOL(snd_sbdsp_create);
297 EXPORT_SYMBOL(snd_sbmixer_write);
298 EXPORT_SYMBOL(snd_sbmixer_read);
299 EXPORT_SYMBOL(snd_sbmixer_new);
300 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
306 static int __init alsa_sb_common_init(void)
311 static void __exit alsa_sb_common_exit(void)
315 module_init(alsa_sb_common_init)
316 module_exit(alsa_sb_common_exit)