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261 lines
5.7 KiB
261 lines
5.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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* Uros Bizjak <[email protected]> |
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* |
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* Lowlevel routines for control of Sound Blaster cards |
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*/ |
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#include <linux/delay.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/slab.h> |
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#include <linux/ioport.h> |
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#include <linux/module.h> |
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#include <linux/io.h> |
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#include <sound/core.h> |
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#include <sound/sb.h> |
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#include <sound/initval.h> |
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#include <asm/dma.h> |
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MODULE_AUTHOR("Jaroslav Kysela <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards"); |
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MODULE_LICENSE("GPL"); |
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#define BUSY_LOOPS 100000 |
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#undef IO_DEBUG |
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int snd_sbdsp_command(struct snd_sb *chip, unsigned char val) |
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{ |
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int i; |
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#ifdef IO_DEBUG |
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snd_printk(KERN_DEBUG "command 0x%x\n", val); |
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#endif |
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for (i = BUSY_LOOPS; i; i--) |
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if ((inb(SBP(chip, STATUS)) & 0x80) == 0) { |
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outb(val, SBP(chip, COMMAND)); |
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return 1; |
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} |
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snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val); |
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return 0; |
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} |
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int snd_sbdsp_get_byte(struct snd_sb *chip) |
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{ |
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int val; |
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int i; |
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for (i = BUSY_LOOPS; i; i--) { |
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if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { |
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val = inb(SBP(chip, READ)); |
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#ifdef IO_DEBUG |
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snd_printk(KERN_DEBUG "get_byte 0x%x\n", val); |
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#endif |
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return val; |
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} |
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} |
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snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port); |
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return -ENODEV; |
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} |
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int snd_sbdsp_reset(struct snd_sb *chip) |
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{ |
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int i; |
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outb(1, SBP(chip, RESET)); |
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udelay(10); |
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outb(0, SBP(chip, RESET)); |
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udelay(30); |
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for (i = BUSY_LOOPS; i; i--) |
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if (inb(SBP(chip, DATA_AVAIL)) & 0x80) { |
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if (inb(SBP(chip, READ)) == 0xaa) |
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return 0; |
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else |
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break; |
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} |
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snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port); |
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return -ENODEV; |
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} |
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static int snd_sbdsp_version(struct snd_sb * chip) |
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{ |
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unsigned int result; |
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snd_sbdsp_command(chip, SB_DSP_GET_VERSION); |
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result = (short) snd_sbdsp_get_byte(chip) << 8; |
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result |= (short) snd_sbdsp_get_byte(chip); |
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return result; |
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} |
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static int snd_sbdsp_probe(struct snd_sb * chip) |
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{ |
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int version; |
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int major, minor; |
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char *str; |
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unsigned long flags; |
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/* |
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* initialization sequence |
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*/ |
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spin_lock_irqsave(&chip->reg_lock, flags); |
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if (snd_sbdsp_reset(chip) < 0) { |
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spin_unlock_irqrestore(&chip->reg_lock, flags); |
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return -ENODEV; |
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} |
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version = snd_sbdsp_version(chip); |
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if (version < 0) { |
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spin_unlock_irqrestore(&chip->reg_lock, flags); |
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return -ENODEV; |
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} |
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spin_unlock_irqrestore(&chip->reg_lock, flags); |
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major = version >> 8; |
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minor = version & 0xff; |
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snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n", |
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chip->port, major, minor); |
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switch (chip->hardware) { |
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case SB_HW_AUTO: |
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switch (major) { |
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case 1: |
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chip->hardware = SB_HW_10; |
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str = "1.0"; |
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break; |
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case 2: |
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if (minor) { |
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chip->hardware = SB_HW_201; |
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str = "2.01+"; |
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} else { |
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chip->hardware = SB_HW_20; |
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str = "2.0"; |
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} |
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break; |
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case 3: |
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chip->hardware = SB_HW_PRO; |
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str = "Pro"; |
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break; |
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case 4: |
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chip->hardware = SB_HW_16; |
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str = "16"; |
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break; |
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default: |
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snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n", |
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chip->port, major, minor); |
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return -ENODEV; |
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} |
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break; |
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case SB_HW_ALS100: |
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str = "16 (ALS-100)"; |
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break; |
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case SB_HW_ALS4000: |
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str = "16 (ALS-4000)"; |
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break; |
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case SB_HW_DT019X: |
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str = "(DT019X/ALS007)"; |
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break; |
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case SB_HW_CS5530: |
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str = "16 (CS5530)"; |
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break; |
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case SB_HW_JAZZ16: |
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str = "Pro (Jazz16)"; |
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break; |
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default: |
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return -ENODEV; |
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} |
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sprintf(chip->name, "Sound Blaster %s", str); |
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chip->version = (major << 8) | minor; |
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return 0; |
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} |
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int snd_sbdsp_create(struct snd_card *card, |
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unsigned long port, |
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int irq, |
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irq_handler_t irq_handler, |
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int dma8, |
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int dma16, |
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unsigned short hardware, |
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struct snd_sb **r_chip) |
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{ |
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struct snd_sb *chip; |
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int err; |
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if (snd_BUG_ON(!r_chip)) |
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return -EINVAL; |
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*r_chip = NULL; |
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chip = devm_kzalloc(card->dev, sizeof(*chip), GFP_KERNEL); |
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if (!chip) |
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return -ENOMEM; |
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spin_lock_init(&chip->reg_lock); |
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spin_lock_init(&chip->open_lock); |
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spin_lock_init(&chip->midi_input_lock); |
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spin_lock_init(&chip->mixer_lock); |
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chip->irq = -1; |
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chip->dma8 = -1; |
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chip->dma16 = -1; |
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chip->port = port; |
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if (devm_request_irq(card->dev, irq, irq_handler, |
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(hardware == SB_HW_ALS4000 || |
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hardware == SB_HW_CS5530) ? |
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IRQF_SHARED : 0, |
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"SoundBlaster", (void *) chip)) { |
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snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); |
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return -EBUSY; |
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} |
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chip->irq = irq; |
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card->sync_irq = chip->irq; |
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if (hardware == SB_HW_ALS4000) |
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goto __skip_allocation; |
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chip->res_port = devm_request_region(card->dev, port, 16, |
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"SoundBlaster"); |
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if (!chip->res_port) { |
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snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port); |
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return -EBUSY; |
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} |
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#ifdef CONFIG_ISA |
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if (dma8 >= 0 && snd_devm_request_dma(card->dev, dma8, |
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"SoundBlaster - 8bit")) { |
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snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8); |
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return -EBUSY; |
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} |
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chip->dma8 = dma8; |
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if (dma16 >= 0) { |
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if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) { |
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/* no duplex */ |
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dma16 = -1; |
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} else if (snd_devm_request_dma(card->dev, dma16, |
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"SoundBlaster - 16bit")) { |
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snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16); |
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return -EBUSY; |
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} |
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} |
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chip->dma16 = dma16; |
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#endif |
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__skip_allocation: |
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chip->card = card; |
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chip->hardware = hardware; |
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err = snd_sbdsp_probe(chip); |
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if (err < 0) |
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return err; |
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*r_chip = chip; |
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return 0; |
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} |
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EXPORT_SYMBOL(snd_sbdsp_command); |
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EXPORT_SYMBOL(snd_sbdsp_get_byte); |
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EXPORT_SYMBOL(snd_sbdsp_reset); |
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EXPORT_SYMBOL(snd_sbdsp_create); |
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/* sb_mixer.c */ |
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EXPORT_SYMBOL(snd_sbmixer_write); |
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EXPORT_SYMBOL(snd_sbmixer_read); |
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EXPORT_SYMBOL(snd_sbmixer_new); |
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EXPORT_SYMBOL(snd_sbmixer_add_ctl); |
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#ifdef CONFIG_PM |
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EXPORT_SYMBOL(snd_sbmixer_suspend); |
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EXPORT_SYMBOL(snd_sbmixer_resume); |
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#endif
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