// 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; } static int snd_sbdsp_free(struct snd_sb *chip) { 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, irq_handler_t irq_handler, int dma8, int dma16, unsigned short hardware, struct snd_sb **r_chip) { struct snd_sb *chip; int err; static const struct snd_device_ops ops = { .dev_free = snd_sbdsp_dev_free, }; if (snd_BUG_ON(!r_chip)) 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 || hardware == SB_HW_CS5530) ? IRQF_SHARED : 0, "SoundBlaster", (void *) chip)) { snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); snd_sbdsp_free(chip); return -EBUSY; } chip->irq = irq; card->sync_irq = chip->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