diff options
Diffstat (limited to 'sound/isa/sb/sb_common.c')
| -rw-r--r-- | sound/isa/sb/sb_common.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/sound/isa/sb/sb_common.c b/sound/isa/sb/sb_common.c new file mode 100644 index 0000000000..c0e319d142 --- /dev/null +++ b/sound/isa/sb/sb_common.c @@ -0,0 +1,261 @@ +// 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 |