diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/sound/isa/sb/sb_common.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/sound/isa/sb/sb_common.c')
-rw-r--r-- | kernel/sound/isa/sb/sb_common.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/kernel/sound/isa/sb/sb_common.c b/kernel/sound/isa/sb/sb_common.c new file mode 100644 index 000000000..787a4ade4 --- /dev/null +++ b/kernel/sound/isa/sb/sb_common.c @@ -0,0 +1,323 @@ +/* + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * Uros Bizjak <uros@kss-loka.si> + * + * 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 <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 = -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(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 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; + + 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 + +/* + * 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) |