sound/isa/sb/sb_common.c - maze/linux - Git at Google

 /*
  *  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 <sound/core.h>
 #include <sound/sb.h>
 #include <sound/initval.h>

 #include <asm/io.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;
 	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)
 {
 	if (chip->res_port)
 		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,
 	};

 	snd_assert(r_chip != NULL, 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 : IRQF_DISABLED,
 			"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)
	/*
	* 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 <sound/core.h>
	#include <sound/sb.h>
	#include <sound/initval.h>

	#include <asm/io.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;
	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)
	{
	if (chip->res_port)
	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,
	};

	snd_assert(r_chip != NULL, 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 : IRQF_DISABLED,
	"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)