Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jaroslav Kysela |
817 |
70.49% |
11 |
15.49% |
| Linus Torvalds (pre-git) |
185 |
15.96% |
33 |
46.48% |
| Takashi Iwai |
103 |
8.89% |
10 |
14.08% |
| Linus Torvalds |
30 |
2.59% |
9 |
12.68% |
| Krzysztof Helt |
8 |
0.69% |
1 |
1.41% |
| Arnaldo Carvalho de Melo |
5 |
0.43% |
1 |
1.41% |
| Thomas Gleixner |
3 |
0.26% |
2 |
2.82% |
| Paul Gortmaker |
3 |
0.26% |
1 |
1.41% |
| Harvey Harrison |
3 |
0.26% |
1 |
1.41% |
| David Howells |
1 |
0.09% |
1 |
1.41% |
| Yong Zhang |
1 |
0.09% |
1 |
1.41% |
| Total |
1159 |
|
71 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Uros Bizjak <uros@kss-loka.si>
*
* Lowlevel routines for control of Sound Blaster cards
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/initval.h>
#include <asm/dma.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.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", __func__, 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", __func__, 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", __func__, chip->port);
return -ENODEV;
}
static int snd_sbdsp_version(struct snd_sb * chip)
{
unsigned int result;
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;
case SB_HW_CS5530:
str = "16 (CS5530)";
break;
case SB_HW_JAZZ16:
str = "Pro (Jazz16)";
break;
default:
return -ENODEV;
}
sprintf(chip->name, "Sound Blaster %s", str);
chip->version = (major << 8) | minor;
return 0;
}
int snd_sbdsp_create(struct snd_card *card,
unsigned long port,
int irq,
irq_handler_t irq_handler,
int dma8,
int dma16,
unsigned short hardware,
struct snd_sb **r_chip)
{
struct snd_sb *chip;
int err;
if (snd_BUG_ON(!r_chip))
return -EINVAL;
*r_chip = NULL;
chip = devm_kzalloc(card->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
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 (devm_request_irq(card->dev, irq, irq_handler,
(hardware == SB_HW_ALS4000 ||
hardware == SB_HW_CS5530) ?
IRQF_SHARED : 0,
"SoundBlaster", (void *) chip)) {
snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
return -EBUSY;
}
chip->irq = irq;
card->sync_irq = chip->irq;
if (hardware == SB_HW_ALS4000)
goto __skip_allocation;
chip->res_port = devm_request_region(card->dev, port, 16,
"SoundBlaster");
if (!chip->res_port) {
snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
return -EBUSY;
}
#ifdef CONFIG_ISA
if (dma8 >= 0 && snd_devm_request_dma(card->dev, dma8,
"SoundBlaster - 8bit")) {
snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
return -EBUSY;
}
chip->dma8 = dma8;
if (dma16 >= 0) {
if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
/* no duplex */
dma16 = -1;
} else if (snd_devm_request_dma(card->dev, dma16,
"SoundBlaster - 16bit")) {
snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
return -EBUSY;
}
}
chip->dma16 = dma16;
#endif
__skip_allocation:
chip->card = card;
chip->hardware = hardware;
err = snd_sbdsp_probe(chip);
if (err < 0)
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