sound/isa/gus/gusmax.c - linux-mtk - Git at Google

 /*
  *  Driver for Gravis UltraSound MAX soundcard
  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
  *
  *
  *   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 <sound/driver.h>
 #include <asm/dma.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/time.h>
 #include <linux/moduleparam.h>
 #include <sound/core.h>
 #include <sound/gus.h>
 #include <sound/cs4231.h>
 #define SNDRV_LEGACY_AUTO_PROBE
 #define SNDRV_LEGACY_FIND_FREE_IRQ
 #define SNDRV_LEGACY_FIND_FREE_DMA
 #include <sound/initval.h>

 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
 MODULE_DESCRIPTION("Gravis UltraSound MAX");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Gravis,UltraSound MAX}}");

 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;	/* Enable this card */
 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x220,0x230,0x240,0x250,0x260 */
 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 2,3,5,9,11,12,15 */
 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 1,3,5,6,7 */
 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 1,3,5,6,7 */
 static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
 				/* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
 static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24};
 static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};

 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for GUS MAX soundcard.");
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for GUS MAX soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable GUS MAX soundcard.");
 module_param_array(port, long, NULL, 0444);
 MODULE_PARM_DESC(port, "Port # for GUS MAX driver.");
 module_param_array(irq, int, NULL, 0444);
 MODULE_PARM_DESC(irq, "IRQ # for GUS MAX driver.");
 module_param_array(dma1, int, NULL, 0444);
 MODULE_PARM_DESC(dma1, "DMA1 # for GUS MAX driver.");
 module_param_array(dma2, int, NULL, 0444);
 MODULE_PARM_DESC(dma2, "DMA2 # for GUS MAX driver.");
 module_param_array(joystick_dac, int, NULL, 0444);
 MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for GUS MAX driver.");
 module_param_array(channels, int, NULL, 0444);
 MODULE_PARM_DESC(channels, "Used GF1 channels for GUS MAX driver.");
 module_param_array(pcm_channels, int, NULL, 0444);
 MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS MAX driver.");

 struct snd_gusmax {
 	int irq;
 	snd_card_t *card;
 	snd_gus_card_t *gus;
 	cs4231_t *cs4231;
 	unsigned short gus_status_reg;
 	unsigned short pcm_status_reg;
 };

 static snd_card_t *snd_gusmax_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;


 static int __init snd_gusmax_detect(snd_gus_card_t * gus)
 {
 	snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);	/* reset GF1 */
 #ifdef CONFIG_SND_DEBUG_DETECT
 	{
 		unsigned char d;

 		if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
 			snd_printk("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
 			return -ENODEV;
 		}
 	}
 #else
 	if ((snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET) & 0x07) != 0)
 		return -ENODEV;
 #endif
 	udelay(160);
 	snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);	/* release reset */
 	udelay(160);
 #ifdef CONFIG_SND_DEBUG_DETECT
 	{
 		unsigned char d;

 		if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
 			snd_printk("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
 			return -ENODEV;
 		}
 	}
 #else
 	if ((snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET) & 0x07) != 1)
 		return -ENODEV;
 #endif
 	return 0;
 }

 static irqreturn_t snd_gusmax_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
 	struct snd_gusmax *maxcard = (struct snd_gusmax *) dev_id;
 	int loop, max = 5;
 	int handled = 0;

 	do {
 		loop = 0;
 		if (inb(maxcard->gus_status_reg)) {
 			handled = 1;
 			snd_gus_interrupt(irq, maxcard->gus, regs);
 			loop++;
 		}
 		if (inb(maxcard->pcm_status_reg) & 0x01) { /* IRQ bit is set? */
 			handled = 1;
 			snd_cs4231_interrupt(irq, maxcard->cs4231, regs);
 			loop++;
 		}
 	} while (loop && --max > 0);
 	return IRQ_RETVAL(handled);
 }

 static void __init snd_gusmax_init(int dev, snd_card_t * card, snd_gus_card_t * gus)
 {
 	gus->equal_irq = 1;
 	gus->codec_flag = 1;
 	gus->joystick_dac = joystick_dac[dev];
 	/* init control register */
 	gus->max_cntrl_val = (gus->gf1.port >> 4) & 0x0f;
 	if (gus->gf1.dma1 > 3)
 		gus->max_cntrl_val |= 0x10;
 	if (gus->gf1.dma2 > 3)
 		gus->max_cntrl_val |= 0x20;
 	gus->max_cntrl_val |= 0x40;
 	outb(gus->max_cntrl_val, GUSP(gus, MAXCNTRLPORT));
 }

 #define CS4231_PRIVATE( left, right, shift, mute ) \
 			((left << 24)|(right << 16)|(shift<<8)|mute)

 static int __init snd_gusmax_mixer(cs4231_t *chip)
 {
 	snd_card_t *card = chip->card;
 	snd_ctl_elem_id_t id1, id2;
 	int err;

 	memset(&id1, 0, sizeof(id1));
 	memset(&id2, 0, sizeof(id2));
 	id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	/* reassign AUXA to SYNTHESIZER */
 	strcpy(id1.name, "Aux Playback Switch");
 	strcpy(id2.name, "Synth Playback Switch");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	strcpy(id1.name, "Aux Playback Volume");
 	strcpy(id2.name, "Synth Playback Volume");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	/* reassign AUXB to CD */
 	strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
 	strcpy(id2.name, "CD Playback Switch");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	strcpy(id1.name, "Aux Playback Volume");
 	strcpy(id2.name, "CD Playback Volume");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 #if 0
 	/* reassign Mono Input to MIC */
 	if (snd_mixer_group_rename(mixer,
 				SNDRV_MIXER_IN_MONO, 0,
 				SNDRV_MIXER_IN_MIC, 0) < 0)
 		goto __error;
 	if (snd_mixer_elem_rename(mixer,
 				SNDRV_MIXER_IN_MONO, 0, SNDRV_MIXER_ETYPE_INPUT,
 				SNDRV_MIXER_IN_MIC, 0) < 0)
 		goto __error;
 	if (snd_mixer_elem_rename(mixer,
 				"Mono Capture Volume", 0, SNDRV_MIXER_ETYPE_VOLUME1,
 				"Mic Capture Volume", 0) < 0)
 		goto __error;
 	if (snd_mixer_elem_rename(mixer,
 				"Mono Capture Switch", 0, SNDRV_MIXER_ETYPE_SWITCH1,
 				"Mic Capture Switch", 0) < 0)
 		goto __error;
 #endif
 	return 0;
 }

 static void snd_gusmax_free(snd_card_t *card)
 {
 	struct snd_gusmax *maxcard = (struct snd_gusmax *)card->private_data;

 	if (maxcard == NULL)
 		return;
 	if (maxcard->irq >= 0)
 		free_irq(maxcard->irq, (void *)maxcard);
 }

 static int __init snd_gusmax_probe(int dev)
 {
 	static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
 	static int possible_dmas[] = {5, 6, 7, 1, 3, -1};
 	int xirq, xdma1, xdma2, err;
 	snd_card_t *card;
 	snd_gus_card_t *gus = NULL;
 	cs4231_t *cs4231;
 	struct snd_gusmax *maxcard;

 	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
 			    sizeof(struct snd_gusmax));
 	if (card == NULL)
 		return -ENOMEM;
 	card->private_free = snd_gusmax_free;
 	maxcard = (struct snd_gusmax *)card->private_data;
 	maxcard->card = card;
 	maxcard->irq = -1;

 	xirq = irq[dev];
 	if (xirq == SNDRV_AUTO_IRQ) {
 		if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
 			snd_card_free(card);
 			snd_printk("unable to find a free IRQ\n");
 			return -EBUSY;
 		}
 	}
 	xdma1 = dma1[dev];
 	if (xdma1 == SNDRV_AUTO_DMA) {
 		if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
 			snd_card_free(card);
 			snd_printk("unable to find a free DMA1\n");
 			return -EBUSY;
 		}
 	}
 	xdma2 = dma2[dev];
 	if (xdma2 == SNDRV_AUTO_DMA) {
 		if ((xdma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
 			snd_card_free(card);
 			snd_printk("unable to find a free DMA2\n");
 			return -EBUSY;
 		}
 	}

 	if ((err = snd_gus_create(card,
 				  port[dev],
 				  -xirq, xdma1, xdma2,
 				  0, channels[dev],
 				  pcm_channels[dev],
 				  0, &gus)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	if ((err = snd_gusmax_detect(gus)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	maxcard->gus_status_reg = gus->gf1.reg_irqstat;
 	maxcard->pcm_status_reg = gus->gf1.port + 0x10c + 2;
 	snd_gusmax_init(dev, card, gus);
 	if ((err = snd_gus_initialize(gus)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	if (!gus->max_flag) {
 		printk(KERN_ERR "GUS MAX soundcard was not detected at 0x%lx\n", gus->gf1.port);
 		snd_card_free(card);
 		return -ENODEV;
 	}

 	if (request_irq(xirq, snd_gusmax_interrupt, SA_INTERRUPT, "GUS MAX", (void *)maxcard)) {
 		snd_card_free(card);
 		printk(KERN_ERR "gusmax: unable to grab IRQ %d\n", xirq);
 		return -EBUSY;
 	}
 	maxcard->irq = xirq;

 	if ((err = snd_cs4231_create(card,
 				     gus->gf1.port + 0x10c, -1, xirq,
 				     xdma2 < 0 ? xdma1 : xdma2, xdma1,
 				     CS4231_HW_DETECT,
 				     CS4231_HWSHARE_IRQ |
 				     CS4231_HWSHARE_DMA1 |
 				     CS4231_HWSHARE_DMA2,
 				     &cs4231)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	if ((err = snd_cs4231_pcm(cs4231, 0, NULL)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	if ((err = snd_cs4231_mixer(cs4231)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	if ((err = snd_cs4231_timer(cs4231, 2, NULL)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	if (pcm_channels[dev] > 0) {
 		if ((err = snd_gf1_pcm_new(gus, 1, 1, NULL)) < 0) {
 			snd_card_free(card);
 			return err;
 		}
 	}
 	if ((err = snd_gusmax_mixer(cs4231)) < 0) {
 		snd_card_free(card);
 		return err;
 	}

 	if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0) {
 		snd_card_free(card);
 		return err;
 	}

 	sprintf(card->longname + strlen(card->longname), " at 0x%lx, irq %i, dma %i", gus->gf1.port, xirq, xdma1);
 	if (xdma2 >= 0)
 		sprintf(card->longname + strlen(card->longname), "&%i", xdma2);
 	if ((err = snd_card_register(card)) < 0) {
 		snd_card_free(card);
 		return err;
 	}

 	maxcard->gus = gus;
 	maxcard->cs4231 = cs4231;
 	snd_gusmax_cards[dev] = card;
 	return 0;
 }

 static int __init snd_gusmax_legacy_auto_probe(unsigned long xport)
 {
 	static int dev;
 	int res;

 	for ( ; dev < SNDRV_CARDS; dev++) {
 		if (!enable[dev] || port[dev] != SNDRV_AUTO_PORT)
 			continue;
 		port[dev] = xport;
 		res = snd_gusmax_probe(dev);
 		if (res < 0)
 			port[dev] = SNDRV_AUTO_PORT;
 		return res;
 	}
 	return -ENODEV;
 }

 static int __init alsa_card_gusmax_init(void)
 {
 	static unsigned long possible_ports[] = {0x220, 0x230, 0x240, 0x250, 0x260, -1};
 	int dev, cards, i;

 	for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev] > 0; dev++) {
 		if (port[dev] == SNDRV_AUTO_PORT)
 			continue;
 		if (snd_gusmax_probe(dev) >= 0)
 			cards++;
 	}
 	i = snd_legacy_auto_probe(possible_ports, snd_gusmax_legacy_auto_probe);
 	if (i > 0)
 		cards += i;

 	if (!cards) {
 #ifdef MODULE
 		printk(KERN_ERR "GUS MAX soundcard not found or device busy\n");
 #endif
 		return -ENODEV;
 	}
 	return 0;
 }

 static void __exit alsa_card_gusmax_exit(void)
 {
 	int idx;

 	for (idx = 0; idx < SNDRV_CARDS; idx++)
 		snd_card_free(snd_gusmax_cards[idx]);
 }

 module_init(alsa_card_gusmax_init)
 module_exit(alsa_card_gusmax_exit)
	/*
	* Driver for Gravis UltraSound MAX soundcard
	* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
	*
	*
	* 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 <sound/driver.h>
	#include <asm/dma.h>
	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/time.h>
	#include <linux/moduleparam.h>
	#include <sound/core.h>
	#include <sound/gus.h>
	#include <sound/cs4231.h>
	#define SNDRV_LEGACY_AUTO_PROBE
	#define SNDRV_LEGACY_FIND_FREE_IRQ
	#define SNDRV_LEGACY_FIND_FREE_DMA
	#include <sound/initval.h>

	MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
	MODULE_DESCRIPTION("Gravis UltraSound MAX");
	MODULE_LICENSE("GPL");
	MODULE_SUPPORTED_DEVICE("{{Gravis,UltraSound MAX}}");

	static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
	static char id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; / ID for this card */
	static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
	static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x220,0x230,0x240,0x250,0x260 */
	static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 2,3,5,9,11,12,15 */
	static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 1,3,5,6,7 */
	static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 1,3,5,6,7 */
	static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
	/* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
	static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24};
	static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};

	module_param_array(index, int, NULL, 0444);
	MODULE_PARM_DESC(index, "Index value for GUS MAX soundcard.");
	module_param_array(id, charp, NULL, 0444);
	MODULE_PARM_DESC(id, "ID string for GUS MAX soundcard.");
	module_param_array(enable, bool, NULL, 0444);
	MODULE_PARM_DESC(enable, "Enable GUS MAX soundcard.");
	module_param_array(port, long, NULL, 0444);
	MODULE_PARM_DESC(port, "Port # for GUS MAX driver.");
	module_param_array(irq, int, NULL, 0444);
	MODULE_PARM_DESC(irq, "IRQ # for GUS MAX driver.");
	module_param_array(dma1, int, NULL, 0444);
	MODULE_PARM_DESC(dma1, "DMA1 # for GUS MAX driver.");
	module_param_array(dma2, int, NULL, 0444);
	MODULE_PARM_DESC(dma2, "DMA2 # for GUS MAX driver.");
	module_param_array(joystick_dac, int, NULL, 0444);
	MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for GUS MAX driver.");
	module_param_array(channels, int, NULL, 0444);
	MODULE_PARM_DESC(channels, "Used GF1 channels for GUS MAX driver.");
	module_param_array(pcm_channels, int, NULL, 0444);
	MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS MAX driver.");

	struct snd_gusmax {
	int irq;
	snd_card_t *card;
	snd_gus_card_t *gus;
	cs4231_t *cs4231;
	unsigned short gus_status_reg;
	unsigned short pcm_status_reg;
	};

	static snd_card_t *snd_gusmax_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;


	static int __init snd_gusmax_detect(snd_gus_card_t * gus)
	{
	snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0); /* reset GF1 */
	#ifdef CONFIG_SND_DEBUG_DETECT
	{
	unsigned char d;

	if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
	snd_printk("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
	return -ENODEV;
	}
	}
	#else
	if ((snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET) & 0x07) != 0)
	return -ENODEV;
	#endif
	udelay(160);
	snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1); /* release reset */
	udelay(160);
	#ifdef CONFIG_SND_DEBUG_DETECT
	{
	unsigned char d;

	if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
	snd_printk("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
	return -ENODEV;
	}
	}
	#else
	if ((snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET) & 0x07) != 1)
	return -ENODEV;
	#endif
	return 0;
	}

	static irqreturn_t snd_gusmax_interrupt(int irq, void dev_id, struct pt_regs regs)
	{
	struct snd_gusmax maxcard = (struct snd_gusmax ) dev_id;
	int loop, max = 5;
	int handled = 0;

	do {
	loop = 0;
	if (inb(maxcard->gus_status_reg)) {
	handled = 1;
	snd_gus_interrupt(irq, maxcard->gus, regs);
	loop++;
	}
	if (inb(maxcard->pcm_status_reg) & 0x01) { /* IRQ bit is set? */
	handled = 1;
	snd_cs4231_interrupt(irq, maxcard->cs4231, regs);
	loop++;
	}
	} while (loop && --max > 0);
	return IRQ_RETVAL(handled);
	}

	static void __init snd_gusmax_init(int dev, snd_card_t * card, snd_gus_card_t * gus)
	{
	gus->equal_irq = 1;
	gus->codec_flag = 1;
	gus->joystick_dac = joystick_dac[dev];
	/* init control register */
	gus->max_cntrl_val = (gus->gf1.port >> 4) & 0x0f;
	if (gus->gf1.dma1 > 3)
	gus->max_cntrl_val \|= 0x10;
	if (gus->gf1.dma2 > 3)
	gus->max_cntrl_val \|= 0x20;
	gus->max_cntrl_val \|= 0x40;
	outb(gus->max_cntrl_val, GUSP(gus, MAXCNTRLPORT));
	}

	#define CS4231_PRIVATE( left, right, shift, mute ) \
	((left << 24)\|(right << 16)\|(shift<<8)\|mute)

	static int __init snd_gusmax_mixer(cs4231_t *chip)
	{
	snd_card_t *card = chip->card;
	snd_ctl_elem_id_t id1, id2;
	int err;

	memset(&id1, 0, sizeof(id1));
	memset(&id2, 0, sizeof(id2));
	id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	/* reassign AUXA to SYNTHESIZER */
	strcpy(id1.name, "Aux Playback Switch");
	strcpy(id2.name, "Synth Playback Switch");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	strcpy(id1.name, "Aux Playback Volume");
	strcpy(id2.name, "Synth Playback Volume");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	/* reassign AUXB to CD */
	strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
	strcpy(id2.name, "CD Playback Switch");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	strcpy(id1.name, "Aux Playback Volume");
	strcpy(id2.name, "CD Playback Volume");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	#if 0
	/* reassign Mono Input to MIC */
	if (snd_mixer_group_rename(mixer,
	SNDRV_MIXER_IN_MONO, 0,
	SNDRV_MIXER_IN_MIC, 0) < 0)
	goto __error;
	if (snd_mixer_elem_rename(mixer,
	SNDRV_MIXER_IN_MONO, 0, SNDRV_MIXER_ETYPE_INPUT,
	SNDRV_MIXER_IN_MIC, 0) < 0)
	goto __error;
	if (snd_mixer_elem_rename(mixer,
	"Mono Capture Volume", 0, SNDRV_MIXER_ETYPE_VOLUME1,
	"Mic Capture Volume", 0) < 0)
	goto __error;
	if (snd_mixer_elem_rename(mixer,
	"Mono Capture Switch", 0, SNDRV_MIXER_ETYPE_SWITCH1,
	"Mic Capture Switch", 0) < 0)
	goto __error;
	#endif
	return 0;
	}

	static void snd_gusmax_free(snd_card_t *card)
	{
	struct snd_gusmax maxcard = (struct snd_gusmax )card->private_data;

	if (maxcard == NULL)
	return;
	if (maxcard->irq >= 0)
	free_irq(maxcard->irq, (void *)maxcard);
	}

	static int __init snd_gusmax_probe(int dev)
	{
	static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
	static int possible_dmas[] = {5, 6, 7, 1, 3, -1};
	int xirq, xdma1, xdma2, err;
	snd_card_t *card;
	snd_gus_card_t *gus = NULL;
	cs4231_t *cs4231;
	struct snd_gusmax *maxcard;

	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
	sizeof(struct snd_gusmax));
	if (card == NULL)
	return -ENOMEM;
	card->private_free = snd_gusmax_free;
	maxcard = (struct snd_gusmax *)card->private_data;
	maxcard->card = card;
	maxcard->irq = -1;

	xirq = irq[dev];
	if (xirq == SNDRV_AUTO_IRQ) {
	if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
	snd_card_free(card);
	snd_printk("unable to find a free IRQ\n");
	return -EBUSY;
	}
	}
	xdma1 = dma1[dev];
	if (xdma1 == SNDRV_AUTO_DMA) {
	if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
	snd_card_free(card);
	snd_printk("unable to find a free DMA1\n");
	return -EBUSY;
	}
	}
	xdma2 = dma2[dev];
	if (xdma2 == SNDRV_AUTO_DMA) {
	if ((xdma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
	snd_card_free(card);
	snd_printk("unable to find a free DMA2\n");
	return -EBUSY;
	}
	}

	if ((err = snd_gus_create(card,
	port[dev],
	-xirq, xdma1, xdma2,
	0, channels[dev],
	pcm_channels[dev],
	0, &gus)) < 0) {
	snd_card_free(card);
	return err;
	}
	if ((err = snd_gusmax_detect(gus)) < 0) {
	snd_card_free(card);
	return err;
	}
	maxcard->gus_status_reg = gus->gf1.reg_irqstat;
	maxcard->pcm_status_reg = gus->gf1.port + 0x10c + 2;
	snd_gusmax_init(dev, card, gus);
	if ((err = snd_gus_initialize(gus)) < 0) {
	snd_card_free(card);
	return err;
	}
	if (!gus->max_flag) {
	printk(KERN_ERR "GUS MAX soundcard was not detected at 0x%lx\n", gus->gf1.port);
	snd_card_free(card);
	return -ENODEV;
	}

	if (request_irq(xirq, snd_gusmax_interrupt, SA_INTERRUPT, "GUS MAX", (void *)maxcard)) {
	snd_card_free(card);
	printk(KERN_ERR "gusmax: unable to grab IRQ %d\n", xirq);
	return -EBUSY;
	}
	maxcard->irq = xirq;

	if ((err = snd_cs4231_create(card,
	gus->gf1.port + 0x10c, -1, xirq,
	xdma2 < 0 ? xdma1 : xdma2, xdma1,
	CS4231_HW_DETECT,
	CS4231_HWSHARE_IRQ \|
	CS4231_HWSHARE_DMA1 \|
	CS4231_HWSHARE_DMA2,
	&cs4231)) < 0) {
	snd_card_free(card);
	return err;
	}
	if ((err = snd_cs4231_pcm(cs4231, 0, NULL)) < 0) {
	snd_card_free(card);
	return err;
	}
	if ((err = snd_cs4231_mixer(cs4231)) < 0) {
	snd_card_free(card);
	return err;
	}
	if ((err = snd_cs4231_timer(cs4231, 2, NULL)) < 0) {
	snd_card_free(card);
	return err;
	}
	if (pcm_channels[dev] > 0) {
	if ((err = snd_gf1_pcm_new(gus, 1, 1, NULL)) < 0) {
	snd_card_free(card);
	return err;
	}
	}
	if ((err = snd_gusmax_mixer(cs4231)) < 0) {
	snd_card_free(card);
	return err;
	}

	if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0) {
	snd_card_free(card);
	return err;
	}

	sprintf(card->longname + strlen(card->longname), " at 0x%lx, irq %i, dma %i", gus->gf1.port, xirq, xdma1);
	if (xdma2 >= 0)
	sprintf(card->longname + strlen(card->longname), "&%i", xdma2);
	if ((err = snd_card_register(card)) < 0) {
	snd_card_free(card);
	return err;
	}

	maxcard->gus = gus;
	maxcard->cs4231 = cs4231;
	snd_gusmax_cards[dev] = card;
	return 0;
	}

	static int __init snd_gusmax_legacy_auto_probe(unsigned long xport)
	{
	static int dev;
	int res;

	for ( ; dev < SNDRV_CARDS; dev++) {
	if (!enable[dev] \|\| port[dev] != SNDRV_AUTO_PORT)
	continue;
	port[dev] = xport;
	res = snd_gusmax_probe(dev);
	if (res < 0)
	port[dev] = SNDRV_AUTO_PORT;
	return res;
	}
	return -ENODEV;
	}

	static int __init alsa_card_gusmax_init(void)
	{
	static unsigned long possible_ports[] = {0x220, 0x230, 0x240, 0x250, 0x260, -1};
	int dev, cards, i;

	for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev] > 0; dev++) {
	if (port[dev] == SNDRV_AUTO_PORT)
	continue;
	if (snd_gusmax_probe(dev) >= 0)
	cards++;
	}
	i = snd_legacy_auto_probe(possible_ports, snd_gusmax_legacy_auto_probe);
	if (i > 0)
	cards += i;

	if (!cards) {
	#ifdef MODULE
	printk(KERN_ERR "GUS MAX soundcard not found or device busy\n");
	#endif
	return -ENODEV;
	}
	return 0;
	}

	static void __exit alsa_card_gusmax_exit(void)
	{
	int idx;

	for (idx = 0; idx < SNDRV_CARDS; idx++)
	snd_card_free(snd_gusmax_cards[idx]);
	}

	module_init(alsa_card_gusmax_init)
	module_exit(alsa_card_gusmax_exit)