1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * Uros Bizjak <uros@kss-loka.si>
6 * Lowlevel routines for control of Sound Blaster cards
9 #include <linux/delay.h>
10 #include <linux/init.h>
11 #include <linux/interrupt.h>
12 #include <linux/slab.h>
13 #include <linux/ioport.h>
14 #include <linux/module.h>
16 #include <sound/core.h>
18 #include <sound/initval.h>
22 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
23 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
24 MODULE_LICENSE("GPL");
26 #define BUSY_LOOPS 100000
30 int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
34 snd_printk(KERN_DEBUG "command 0x%x\n", val);
36 for (i = BUSY_LOOPS; i; i--)
37 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
38 outb(val, SBP(chip, COMMAND));
41 snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val);
45 int snd_sbdsp_get_byte(struct snd_sb *chip)
49 for (i = BUSY_LOOPS; i; i--) {
50 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
51 val = inb(SBP(chip, READ));
53 snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
58 snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port);
62 int snd_sbdsp_reset(struct snd_sb *chip)
66 outb(1, SBP(chip, RESET));
68 outb(0, SBP(chip, RESET));
70 for (i = BUSY_LOOPS; i; i--)
71 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
72 if (inb(SBP(chip, READ)) == 0xaa)
77 snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port);
81 static int snd_sbdsp_version(struct snd_sb * chip)
85 snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
86 result = (short) snd_sbdsp_get_byte(chip) << 8;
87 result |= (short) snd_sbdsp_get_byte(chip);
91 static int snd_sbdsp_probe(struct snd_sb * chip)
99 * initialization sequence
102 spin_lock_irqsave(&chip->reg_lock, flags);
103 if (snd_sbdsp_reset(chip) < 0) {
104 spin_unlock_irqrestore(&chip->reg_lock, flags);
107 version = snd_sbdsp_version(chip);
109 spin_unlock_irqrestore(&chip->reg_lock, flags);
112 spin_unlock_irqrestore(&chip->reg_lock, flags);
113 major = version >> 8;
114 minor = version & 0xff;
115 snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
116 chip->port, major, minor);
118 switch (chip->hardware) {
122 chip->hardware = SB_HW_10;
127 chip->hardware = SB_HW_201;
130 chip->hardware = SB_HW_20;
135 chip->hardware = SB_HW_PRO;
139 chip->hardware = SB_HW_16;
143 snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
144 chip->port, major, minor);
149 str = "16 (ALS-100)";
152 str = "16 (ALS-4000)";
155 str = "(DT019X/ALS007)";
161 str = "Pro (Jazz16)";
166 sprintf(chip->name, "Sound Blaster %s", str);
167 chip->version = (major << 8) | minor;
171 static int snd_sbdsp_free(struct snd_sb *chip)
173 release_and_free_resource(chip->res_port);
175 free_irq(chip->irq, (void *) chip);
177 if (chip->dma8 >= 0) {
178 disable_dma(chip->dma8);
179 free_dma(chip->dma8);
181 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
182 disable_dma(chip->dma16);
183 free_dma(chip->dma16);
190 static int snd_sbdsp_dev_free(struct snd_device *device)
192 struct snd_sb *chip = device->device_data;
193 return snd_sbdsp_free(chip);
196 int snd_sbdsp_create(struct snd_card *card,
199 irq_handler_t irq_handler,
202 unsigned short hardware,
203 struct snd_sb **r_chip)
207 static struct snd_device_ops ops = {
208 .dev_free = snd_sbdsp_dev_free,
211 if (snd_BUG_ON(!r_chip))
214 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
217 spin_lock_init(&chip->reg_lock);
218 spin_lock_init(&chip->open_lock);
219 spin_lock_init(&chip->midi_input_lock);
220 spin_lock_init(&chip->mixer_lock);
226 if (request_irq(irq, irq_handler,
227 (hardware == SB_HW_ALS4000 ||
228 hardware == SB_HW_CS5530) ?
230 "SoundBlaster", (void *) chip)) {
231 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
232 snd_sbdsp_free(chip);
237 if (hardware == SB_HW_ALS4000)
238 goto __skip_allocation;
240 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
241 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
242 snd_sbdsp_free(chip);
247 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
248 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
249 snd_sbdsp_free(chip);
254 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
257 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
258 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
259 snd_sbdsp_free(chip);
268 chip->hardware = hardware;
269 if ((err = snd_sbdsp_probe(chip)) < 0) {
270 snd_sbdsp_free(chip);
273 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
274 snd_sbdsp_free(chip);
281 EXPORT_SYMBOL(snd_sbdsp_command);
282 EXPORT_SYMBOL(snd_sbdsp_get_byte);
283 EXPORT_SYMBOL(snd_sbdsp_reset);
284 EXPORT_SYMBOL(snd_sbdsp_create);
286 EXPORT_SYMBOL(snd_sbmixer_write);
287 EXPORT_SYMBOL(snd_sbmixer_read);
288 EXPORT_SYMBOL(snd_sbmixer_new);
289 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
291 EXPORT_SYMBOL(snd_sbmixer_suspend);
292 EXPORT_SYMBOL(snd_sbmixer_resume);