[deliverable/linux.git] / sound / isa / sb / sb_common.c

/*
 *  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)
Commit	Line	Data
1da177e4	1	/*
c1017a4c	2	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	3	* Uros Bizjak <uros@kss-loka.si>
	4	*
	5	* Lowlevel routines for control of Sound Blaster cards
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	*/
	22
1da177e4 LT	23	#include <linux/delay.h>
	24	#include <linux/init.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/slab.h>
	27	#include <linux/ioport.h>
	28	#include <sound/core.h>
	29	#include <sound/sb.h>
	30	#include <sound/initval.h>
	31
	32	#include <asm/io.h>
	33	#include <asm/dma.h>
	34
c1017a4c	35	MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4 LT	36	MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
	37	MODULE_LICENSE("GPL");
	38
	39	#define BUSY_LOOPS 100000
	40
	41	#undef IO_DEBUG
	42
029d64b0	43	int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
1da177e4 LT	44	{
	45	int i;
	46	#ifdef IO_DEBUG
99b359ba	47	snd_printk(KERN_DEBUG "command 0x%x\n", val);
1da177e4 LT	48	#endif
	49	for (i = BUSY_LOOPS; i; i--)
	50	if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
	51	outb(val, SBP(chip, COMMAND));
	52	return 1;
	53	}
9bf8e7dd	54	snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val);
1da177e4 LT	55	return 0;
	56	}
	57
029d64b0	58	int snd_sbdsp_get_byte(struct snd_sb *chip)
1da177e4 LT	59	{
	60	int val;
	61	int i;
	62	for (i = BUSY_LOOPS; i; i--) {
	63	if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
	64	val = inb(SBP(chip, READ));
	65	#ifdef IO_DEBUG
99b359ba	66	snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
1da177e4 LT	67	#endif
	68	return val;
	69	}
	70	}
9bf8e7dd	71	snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port);
1da177e4 LT	72	return -ENODEV;
	73	}
	74
029d64b0	75	int snd_sbdsp_reset(struct snd_sb *chip)
1da177e4 LT	76	{
	77	int i;
	78
	79	outb(1, SBP(chip, RESET));
	80	udelay(10);
	81	outb(0, SBP(chip, RESET));
	82	udelay(30);
	83	for (i = BUSY_LOOPS; i; i--)
	84	if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
	85	if (inb(SBP(chip, READ)) == 0xaa)
	86	return 0;
	87	else
	88	break;
	89	}
9bf8e7dd	90	snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port);
1da177e4 LT	91	return -ENODEV;
	92	}
	93
029d64b0	94	static int snd_sbdsp_version(struct snd_sb * chip)
1da177e4 LT	95	{
	96	unsigned int result = -ENODEV;
	97
	98	snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
	99	result = (short) snd_sbdsp_get_byte(chip) << 8;
	100	result \|= (short) snd_sbdsp_get_byte(chip);
	101	return result;
	102	}
	103
029d64b0	104	static int snd_sbdsp_probe(struct snd_sb * chip)
1da177e4 LT	105	{
	106	int version;
	107	int major, minor;
	108	char *str;
	109	unsigned long flags;
	110
	111	/*
	112	* initialization sequence
	113	*/
	114
	115	spin_lock_irqsave(&chip->reg_lock, flags);
	116	if (snd_sbdsp_reset(chip) < 0) {
	117	spin_unlock_irqrestore(&chip->reg_lock, flags);
	118	return -ENODEV;
	119	}
	120	version = snd_sbdsp_version(chip);
	121	if (version < 0) {
	122	spin_unlock_irqrestore(&chip->reg_lock, flags);
	123	return -ENODEV;
	124	}
	125	spin_unlock_irqrestore(&chip->reg_lock, flags);
	126	major = version >> 8;
	127	minor = version & 0xff;
	128	snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
	129	chip->port, major, minor);
621887ae	130
1da177e4 LT	131	switch (chip->hardware) {
	132	case SB_HW_AUTO:
	133	switch (major) {
	134	case 1:
	135	chip->hardware = SB_HW_10;
	136	str = "1.0";
	137	break;
	138	case 2:
	139	if (minor) {
	140	chip->hardware = SB_HW_201;
	141	str = "2.01+";
	142	} else {
	143	chip->hardware = SB_HW_20;
	144	str = "2.0";
	145	}
	146	break;
	147	case 3:
	148	chip->hardware = SB_HW_PRO;
	149	str = "Pro";
	150	break;
	151	case 4:
	152	chip->hardware = SB_HW_16;
	153	str = "16";
	154	break;
	155	default:
99b359ba	156	snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
1da177e4 LT	157	chip->port, major, minor);
	158	return -ENODEV;
	159	}
	160	break;
	161	case SB_HW_ALS100:
	162	str = "16 (ALS-100)";
	163	break;
	164	case SB_HW_ALS4000:
	165	str = "16 (ALS-4000)";
	166	break;
	167	case SB_HW_DT019X:
	168	str = "(DT019X/ALS007)";
	169	break;
621887ae TI	170	case SB_HW_CS5530:
	171	str = "16 (CS5530)";
	172	break;
1da177e4 LT	173	default:
	174	return -ENODEV;
	175	}
	176	sprintf(chip->name, "Sound Blaster %s", str);
	177	chip->version = (major << 8) \| minor;
	178	return 0;
	179	}
	180
029d64b0	181	static int snd_sbdsp_free(struct snd_sb *chip)
1da177e4	182	{
b1d5776d TI	183	if (chip->res_port)
b1d5776d TI	184	release_and_free_resource(chip->res_port);
1da177e4 LT	185	if (chip->irq >= 0)
	186	free_irq(chip->irq, (void *) chip);
	187	#ifdef CONFIG_ISA
	188	if (chip->dma8 >= 0) {
	189	disable_dma(chip->dma8);
	190	free_dma(chip->dma8);
	191	}
	192	if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
	193	disable_dma(chip->dma16);
	194	free_dma(chip->dma16);
	195	}
	196	#endif
	197	kfree(chip);
	198	return 0;
	199	}
	200
029d64b0	201	static int snd_sbdsp_dev_free(struct snd_device *device)
1da177e4	202	{
029d64b0	203	struct snd_sb *chip = device->device_data;
1da177e4 LT	204	return snd_sbdsp_free(chip);
	205	}
	206
029d64b0	207	int snd_sbdsp_create(struct snd_card *card,
1da177e4 LT	208	unsigned long port,
1da177e4 LT	209	int irq,
7d12e780	210	irq_handler_t irq_handler,
1da177e4 LT	211	int dma8,
	212	int dma16,
	213	unsigned short hardware,
029d64b0	214	struct snd_sb **r_chip)
1da177e4	215	{
029d64b0	216	struct snd_sb *chip;
1da177e4	217	int err;
029d64b0	218	static struct snd_device_ops ops = {
1da177e4 LT	219	.dev_free = snd_sbdsp_dev_free,
	220	};
	221
	222	snd_assert(r_chip != NULL, return -EINVAL);
	223	*r_chip = NULL;
9e76a76e	224	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4 LT	225	if (chip == NULL)
	226	return -ENOMEM;
	227	spin_lock_init(&chip->reg_lock);
	228	spin_lock_init(&chip->open_lock);
	229	spin_lock_init(&chip->midi_input_lock);
	230	spin_lock_init(&chip->mixer_lock);
	231	chip->irq = -1;
	232	chip->dma8 = -1;
	233	chip->dma16 = -1;
	234	chip->port = port;
	235
2d4a485b TI	236	if (request_irq(irq, irq_handler,
	237	(hardware == SB_HW_ALS4000 \|\|
	238	hardware == SB_HW_CS5530) ?
437a5a46	239	IRQF_SHARED : IRQF_DISABLED,
1da177e4 LT	240	"SoundBlaster", (void *) chip)) {
	241	snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
	242	snd_sbdsp_free(chip);
	243	return -EBUSY;
	244	}
	245	chip->irq = irq;
	246
	247	if (hardware == SB_HW_ALS4000)
	248	goto __skip_allocation;
	249
	250	if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
	251	snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
	252	snd_sbdsp_free(chip);
	253	return -EBUSY;
	254	}
	255
	256	#ifdef CONFIG_ISA
	257	if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
	258	snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
	259	snd_sbdsp_free(chip);
	260	return -EBUSY;
	261	}
	262	chip->dma8 = dma8;
	263	if (dma16 >= 0) {
	264	if (hardware != SB_HW_ALS100 && (dma16 < 5 \|\| dma16 > 7)) {
	265	/* no duplex */
	266	dma16 = -1;
	267	} else if (request_dma(dma16, "SoundBlaster - 16bit")) {
	268	snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
	269	snd_sbdsp_free(chip);
	270	return -EBUSY;
	271	}
	272	}
	273	chip->dma16 = dma16;
	274	#endif
	275
	276	__skip_allocation:
	277	chip->card = card;
	278	chip->hardware = hardware;
	279	if ((err = snd_sbdsp_probe(chip)) < 0) {
	280	snd_sbdsp_free(chip);
	281	return err;
	282	}
	283	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
	284	snd_sbdsp_free(chip);
	285	return err;
	286	}
	287	*r_chip = chip;
	288	return 0;
	289	}
	290
	291	EXPORT_SYMBOL(snd_sbdsp_command);
	292	EXPORT_SYMBOL(snd_sbdsp_get_byte);
	293	EXPORT_SYMBOL(snd_sbdsp_reset);
	294	EXPORT_SYMBOL(snd_sbdsp_create);
	295	/* sb_mixer.c */
	296	EXPORT_SYMBOL(snd_sbmixer_write);
	297	EXPORT_SYMBOL(snd_sbmixer_read);
	298	EXPORT_SYMBOL(snd_sbmixer_new);
	299	EXPORT_SYMBOL(snd_sbmixer_add_ctl);
5bdb6a16 TI	300	#ifdef CONFIG_PM
	301	EXPORT_SYMBOL(snd_sbmixer_suspend);
	302	EXPORT_SYMBOL(snd_sbmixer_resume);
	303	#endif
1da177e4 LT	304
	305	/*
	306	* INIT part
	307	*/
	308
	309	static int __init alsa_sb_common_init(void)
	310	{
	311	return 0;
	312	}
	313
	314	static void __exit alsa_sb_common_exit(void)
	315	{
	316	}
	317
	318	module_init(alsa_sb_common_init)
	319	module_exit(alsa_sb_common_exit)