/* * Copyright (c) by Jaroslav Kysela * Uros Bizjak * * Lowlevel routines for control of Sound Blaster cards * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #include #include MODULE_AUTHOR("Jaroslav Kysela "); MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards"); MODULE_LICENSE("GPL"); #define BUSY_LOOPS 100000 #undef IO_DEBUG int snd_sbdsp_command(sb_t *chip, unsigned char val) { int i; #ifdef IO_DEBUG snd_printk("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", __FUNCTION__, chip->port, val); return 0; } int snd_sbdsp_get_byte(sb_t *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("get_byte 0x%x\n", val); #endif return val; } } snd_printd("%s [0x%lx]: timeout\n", __FUNCTION__, chip->port); return -ENODEV; } int snd_sbdsp_reset(sb_t *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", __FUNCTION__, chip->port); return -ENODEV; } static int snd_sbdsp_version(sb_t * chip) { unsigned int result = -ENODEV; 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(sb_t * 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("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; default: return -ENODEV; } sprintf(chip->name, "Sound Blaster %s", str); chip->version = (major << 8) | minor; return 0; } static int snd_sbdsp_free(sb_t *chip) { if (chip->res_port) { release_resource(chip->res_port); kfree_nocheck(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(snd_device_t *device) { sb_t *chip = device->device_data; return snd_sbdsp_free(chip); } int snd_sbdsp_create(snd_card_t *card, unsigned long port, int irq, irqreturn_t (*irq_handler)(int, void *, struct pt_regs *), int dma8, int dma16, unsigned short hardware, sb_t **r_chip) { sb_t *chip; int err; static snd_device_ops_t ops = { .dev_free = snd_sbdsp_dev_free, }; snd_assert(r_chip != NULL, return -EINVAL); *r_chip = NULL; chip = kcalloc(1, 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 ? SA_INTERRUPT | SA_SHIRQ : SA_INTERRUPT, "SoundBlaster", (void *) chip)) { snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq); snd_sbdsp_free(chip); return -EBUSY; } chip->irq = 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); /* * INIT part */ static int __init alsa_sb_common_init(void) { return 0; } static void __exit alsa_sb_common_exit(void) { } module_init(alsa_sb_common_init) module_exit(alsa_sb_common_exit)