/*
   *  Driver for SoundBlaster 16/AWE32/AWE64 soundcards
   *  Copyright (c) by Jaroslav Kysela <perex@perex.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 <asm/dma.h>
  #include <linux/init.h>
  #include <linux/pnp.h>
  #include <linux/err.h>
  #include <linux/isa.h>
  #include <linux/module.h>
  #include <sound/core.h>
  #include <sound/sb.h>
  #include <sound/sb16_csp.h>
  #include <sound/mpu401.h>
  #include <sound/opl3.h>
  #include <sound/emu8000.h>
  #include <sound/seq_device.h>
  #define SNDRV_LEGACY_FIND_FREE_IRQ
  #define SNDRV_LEGACY_FIND_FREE_DMA
  #include <sound/initval.h>
  
  #ifdef SNDRV_SBAWE
  #define PFX "sbawe: "
  #else
  #define PFX "sb16: "
  #endif
  
  MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  MODULE_LICENSE("GPL");
  #ifndef SNDRV_SBAWE
  MODULE_DESCRIPTION("Sound Blaster 16");
  MODULE_SUPPORTED_DEVICE("{{Creative Labs,SB 16},"
  		"{Creative Labs,SB Vibra16S},"
  		"{Creative Labs,SB Vibra16C},"
  		"{Creative Labs,SB Vibra16CL},"
  		"{Creative Labs,SB Vibra16X}}");
  #else
  MODULE_DESCRIPTION("Sound Blaster AWE");
  MODULE_SUPPORTED_DEVICE("{{Creative Labs,SB AWE 32},"
  		"{Creative Labs,SB AWE 64},"
  		"{Creative Labs,SB AWE 64 Gold}}");
  #endif
  
  #if 0
  #define SNDRV_DEBUG_IRQ
  #endif
  
  #if defined(SNDRV_SBAWE) && (defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)))
  #define SNDRV_SBAWE_EMU8000
  #endif
  
  static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
  static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
  static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP; /* Enable this card */
  #ifdef CONFIG_PNP
  static bool isapnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  #endif
  static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x220,0x240,0x260,0x280 */
  static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x330,0x300 */
  static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  #ifdef SNDRV_SBAWE_EMU8000
  static long awe_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  #endif
  static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5,7,9,10 */
  static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0,1,3 */
  static int dma16[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 5,6,7 */
  static int mic_agc[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  #ifdef CONFIG_SND_SB16_CSP
  static int csp[SNDRV_CARDS];
  #endif
  #ifdef SNDRV_SBAWE_EMU8000
  static int seq_ports[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 4};
  #endif
  
  module_param_array(index, int, NULL, 0444);
  MODULE_PARM_DESC(index, "Index value for SoundBlaster 16 soundcard.");
  module_param_array(id, charp, NULL, 0444);
  MODULE_PARM_DESC(id, "ID string for SoundBlaster 16 soundcard.");
  module_param_array(enable, bool, NULL, 0444);
  MODULE_PARM_DESC(enable, "Enable SoundBlaster 16 soundcard.");
  #ifdef CONFIG_PNP
  module_param_array(isapnp, bool, NULL, 0444);
  MODULE_PARM_DESC(isapnp, "PnP detection for specified soundcard.");
  #endif
  module_param_array(port, long, NULL, 0444);
  MODULE_PARM_DESC(port, "Port # for SB16 driver.");
  module_param_array(mpu_port, long, NULL, 0444);
  MODULE_PARM_DESC(mpu_port, "MPU-401 port # for SB16 driver.");
  module_param_array(fm_port, long, NULL, 0444);
  MODULE_PARM_DESC(fm_port, "FM port # for SB16 PnP driver.");
  #ifdef SNDRV_SBAWE_EMU8000
  module_param_array(awe_port, long, NULL, 0444);
  MODULE_PARM_DESC(awe_port, "AWE port # for SB16 PnP driver.");
  #endif
  module_param_array(irq, int, NULL, 0444);
  MODULE_PARM_DESC(irq, "IRQ # for SB16 driver.");
  module_param_array(dma8, int, NULL, 0444);
  MODULE_PARM_DESC(dma8, "8-bit DMA # for SB16 driver.");
  module_param_array(dma16, int, NULL, 0444);
  MODULE_PARM_DESC(dma16, "16-bit DMA # for SB16 driver.");
  module_param_array(mic_agc, int, NULL, 0444);
  MODULE_PARM_DESC(mic_agc, "Mic Auto-Gain-Control switch.");
  #ifdef CONFIG_SND_SB16_CSP
  module_param_array(csp, int, NULL, 0444);
  MODULE_PARM_DESC(csp, "ASP/CSP chip support.");
  #endif
  #ifdef SNDRV_SBAWE_EMU8000
  module_param_array(seq_ports, int, NULL, 0444);
  MODULE_PARM_DESC(seq_ports, "Number of sequencer ports for WaveTable synth.");
  #endif
  
  #ifdef CONFIG_PNP
  static int isa_registered;
  static int pnp_registered;
  #endif
  
  struct snd_card_sb16 {
  	struct resource *fm_res;	/* used to block FM i/o region for legacy cards */
  	struct snd_sb *chip;
  #ifdef CONFIG_PNP
  	int dev_no;
  	struct pnp_dev *dev;
  #ifdef SNDRV_SBAWE_EMU8000
  	struct pnp_dev *devwt;
  #endif
  #endif
  };
  
  #ifdef CONFIG_PNP
  
  static struct pnp_card_device_id snd_sb16_pnpids[] = {
  #ifndef SNDRV_SBAWE
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL0024", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL0025", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL0026", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL0027", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL0028", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL0029", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL002a", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	/* Note: This card has also a CTL0051:StereoEnhance device!!! */
  	{ .id = "CTL002b", .devs = { { "CTL0031" } } },
  	/* Sound Blaster 16 PnP */
  	{ .id = "CTL002c", .devs = { { "CTL0031" } } },
  	/* Sound Blaster Vibra16S */
  	{ .id = "CTL0051", .devs = { { "CTL0001" } } },
  	/* Sound Blaster Vibra16C */
  	{ .id = "CTL0070", .devs = { { "CTL0001" } } },
  	/* Sound Blaster Vibra16CL - added by ctm@ardi.com */
  	{ .id = "CTL0080", .devs = { { "CTL0041" } } },
  	/* Sound Blaster 16 'value' PnP. It says model ct4130 on the pcb, */
  	/* but ct4131 on a sticker on the board.. */
  	{ .id = "CTL0086", .devs = { { "CTL0041" } } },
  	/* Sound Blaster Vibra16X */
  	{ .id = "CTL00f0", .devs = { { "CTL0043" } } },
  	/* Sound Blaster 16 (Virtual PC 2004) */
  	{ .id = "tBA03b0", .devs = { {.id="PNPb003" } } },
  #else  /* SNDRV_SBAWE defined */
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0035", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0039", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0042", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0043", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	/* Note: This card has also a CTL0051:StereoEnhance device!!! */
  	{ .id = "CTL0044", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	/* Note: This card has also a CTL0051:StereoEnhance device!!! */
  	{ .id = "CTL0045", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0046", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0047", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0048", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL0054", .devs = { { "CTL0031" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL009a", .devs = { { "CTL0041" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 32 PnP */
  	{ .id = "CTL009c", .devs = { { "CTL0041" }, { "CTL0021" } } },
  	/* Sound Blaster 32 PnP */
  	{ .id = "CTL009f", .devs = { { "CTL0041" }, { "CTL0021" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL009d", .devs = { { "CTL0042" }, { "CTL0022" } } },
  	/* Sound Blaster AWE 64 PnP Gold */
  	{ .id = "CTL009e", .devs = { { "CTL0044" }, { "CTL0023" } } },
  	/* Sound Blaster AWE 64 PnP Gold */
  	{ .id = "CTL00b2", .devs = { { "CTL0044" }, { "CTL0023" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL00c1", .devs = { { "CTL0042" }, { "CTL0022" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL00c3", .devs = { { "CTL0045" }, { "CTL0022" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL00c5", .devs = { { "CTL0045" }, { "CTL0022" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL00c7", .devs = { { "CTL0045" }, { "CTL0022" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL00e4", .devs = { { "CTL0045" }, { "CTL0022" } } },
  	/* Sound Blaster AWE 64 PnP */
  	{ .id = "CTL00e9", .devs = { { "CTL0045" }, { "CTL0022" } } },
  	/* Sound Blaster 16 PnP (AWE) */
  	{ .id = "CTL00ed", .devs = { { "CTL0041" }, { "CTL0070" } } },
  	/* Generic entries */
  	{ .id = "CTLXXXX" , .devs = { { "CTL0031" }, { "CTL0021" } } },
  	{ .id = "CTLXXXX" , .devs = { { "CTL0041" }, { "CTL0021" } } },
  	{ .id = "CTLXXXX" , .devs = { { "CTL0042" }, { "CTL0022" } } },
  	{ .id = "CTLXXXX" , .devs = { { "CTL0044" }, { "CTL0023" } } },
  	{ .id = "CTLXXXX" , .devs = { { "CTL0045" }, { "CTL0022" } } },
  #endif /* SNDRV_SBAWE */
  	{ .id = "", }
  };
  
  MODULE_DEVICE_TABLE(pnp_card, snd_sb16_pnpids);
  
  #endif /* CONFIG_PNP */
  
  #ifdef SNDRV_SBAWE_EMU8000
  #define DRIVER_NAME	"snd-card-sbawe"
  #else
  #define DRIVER_NAME	"snd-card-sb16"
  #endif
  
  #ifdef CONFIG_PNP
  
  static int snd_card_sb16_pnp(int dev, struct snd_card_sb16 *acard,
  			     struct pnp_card_link *card,
  			     const struct pnp_card_device_id *id)
  {
  	struct pnp_dev *pdev;
  	int err;
  
  	acard->dev = pnp_request_card_device(card, id->devs[0].id, NULL);
  	if (acard->dev == NULL)
  		return -ENODEV; 
  
  #ifdef SNDRV_SBAWE_EMU8000
  	acard->devwt = pnp_request_card_device(card, id->devs[1].id, acard->dev);
  #endif
  	/* Audio initialization */
  	pdev = acard->dev;
  
  	err = pnp_activate_dev(pdev); 
  	if (err < 0) { 
  		snd_printk(KERN_ERR PFX "AUDIO pnp configure failure
  "); 
  		return err; 
  	} 
  	port[dev] = pnp_port_start(pdev, 0);
  	mpu_port[dev] = pnp_port_start(pdev, 1);
  	fm_port[dev] = pnp_port_start(pdev, 2);
  	dma8[dev] = pnp_dma(pdev, 0);
  	dma16[dev] = pnp_dma(pdev, 1);
  	irq[dev] = pnp_irq(pdev, 0);
  	snd_printdd("pnp SB16: port=0x%lx, mpu port=0x%lx, fm port=0x%lx
  ",
  			port[dev], mpu_port[dev], fm_port[dev]);
  	snd_printdd("pnp SB16: dma1=%i, dma2=%i, irq=%i
  ",
  			dma8[dev], dma16[dev], irq[dev]);
  #ifdef SNDRV_SBAWE_EMU8000
  	/* WaveTable initialization */
  	pdev = acard->devwt;
  	if (pdev != NULL) {
  		err = pnp_activate_dev(pdev); 
  		if (err < 0) { 
  			goto __wt_error; 
  		} 
  		awe_port[dev] = pnp_port_start(pdev, 0);
  		snd_printdd("pnp SB16: wavetable port=0x%llx
  ",
  				(unsigned long long)pnp_port_start(pdev, 0));
  	} else {
  __wt_error:
  		if (pdev) {
  			pnp_release_card_device(pdev);
  			snd_printk(KERN_ERR PFX "WaveTable pnp configure failure
  ");
  		}
  		acard->devwt = NULL;
  		awe_port[dev] = -1;
  	}
  #endif
  	return 0;
  }
  
  #endif /* CONFIG_PNP */
  
  static void snd_sb16_free(struct snd_card *card)
  {
  	struct snd_card_sb16 *acard = card->private_data;
          
  	if (acard == NULL)
  		return;
  	release_and_free_resource(acard->fm_res);
  }
  
  #ifdef CONFIG_PNP
  #define is_isapnp_selected(dev)		isapnp[dev]
  #else
  #define is_isapnp_selected(dev)		0
  #endif
  
  static int snd_sb16_card_new(int dev, struct snd_card **cardp)
  {
  	struct snd_card *card;
  	int err;
  
  	err = snd_card_create(index[dev], id[dev], THIS_MODULE,
  			      sizeof(struct snd_card_sb16), &card);
  	if (err < 0)
  		return err;
  	card->private_free = snd_sb16_free;
  	*cardp = card;
  	return 0;
  }
  
  static int snd_sb16_probe(struct snd_card *card, int dev)
  {
  	int xirq, xdma8, xdma16;
  	struct snd_sb *chip;
  	struct snd_card_sb16 *acard = card->private_data;
  	struct snd_opl3 *opl3;
  	struct snd_hwdep *synth = NULL;
  #ifdef CONFIG_SND_SB16_CSP
  	struct snd_hwdep *xcsp = NULL;
  #endif
  	unsigned long flags;
  	int err;
  
  	xirq = irq[dev];
  	xdma8 = dma8[dev];
  	xdma16 = dma16[dev];
  
  	if ((err = snd_sbdsp_create(card,
  				    port[dev],
  				    xirq,
  				    snd_sb16dsp_interrupt,
  				    xdma8,
  				    xdma16,
  				    SB_HW_AUTO,
  				    &chip)) < 0)
  		return err;
  
  	acard->chip = chip;
  	if (chip->hardware != SB_HW_16) {
  		snd_printk(KERN_ERR PFX "SB 16 chip was not detected at 0x%lx
  ", port[dev]);
  		return -ENODEV;
  	}
  	chip->mpu_port = mpu_port[dev];
  	if (! is_isapnp_selected(dev) && (err = snd_sb16dsp_configure(chip)) < 0)
  		return err;
  
  	if ((err = snd_sb16dsp_pcm(chip, 0, &chip->pcm)) < 0)
  		return err;
  
  	strcpy(card->driver,
  #ifdef SNDRV_SBAWE_EMU8000
  			awe_port[dev] > 0 ? "SB AWE" :
  #endif
  			"SB16");
  	strcpy(card->shortname, chip->name);
  	sprintf(card->longname, "%s at 0x%lx, irq %i, dma ",
  		chip->name,
  		chip->port,
  		xirq);
  	if (xdma8 >= 0)
  		sprintf(card->longname + strlen(card->longname), "%d", xdma8);
  	if (xdma16 >= 0)
  		sprintf(card->longname + strlen(card->longname), "%s%d",
  			xdma8 >= 0 ? "&" : "", xdma16);
  
  	if (chip->mpu_port > 0 && chip->mpu_port != SNDRV_AUTO_PORT) {
  		if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_SB,
  					       chip->mpu_port,
  					       MPU401_INFO_IRQ_HOOK, -1,
  					       &chip->rmidi)) < 0)
  			return err;
  		chip->rmidi_callback = snd_mpu401_uart_interrupt;
  	}
  
  #ifdef SNDRV_SBAWE_EMU8000
  	if (awe_port[dev] == SNDRV_AUTO_PORT)
  		awe_port[dev] = 0; /* disable */
  #endif
  
  	if (fm_port[dev] > 0 && fm_port[dev] != SNDRV_AUTO_PORT) {
  		if (snd_opl3_create(card, fm_port[dev], fm_port[dev] + 2,
  				    OPL3_HW_OPL3,
  				    acard->fm_res != NULL || fm_port[dev] == port[dev],
  				    &opl3) < 0) {
  			snd_printk(KERN_ERR PFX "no OPL device at 0x%lx-0x%lx
  ",
  				   fm_port[dev], fm_port[dev] + 2);
  		} else {
  #ifdef SNDRV_SBAWE_EMU8000
  			int seqdev = awe_port[dev] > 0 ? 2 : 1;
  #else
  			int seqdev = 1;
  #endif
  			if ((err = snd_opl3_hwdep_new(opl3, 0, seqdev, &synth)) < 0)
  				return err;
  		}
  	}
  
  	if ((err = snd_sbmixer_new(chip)) < 0)
  		return err;
  
  #ifdef CONFIG_SND_SB16_CSP
  	/* CSP chip on SB16ASP/AWE32 */
  	if ((chip->hardware == SB_HW_16) && csp[dev]) {
  		snd_sb_csp_new(chip, synth != NULL ? 1 : 0, &xcsp);
  		if (xcsp) {
  			chip->csp = xcsp->private_data;
  			chip->hardware = SB_HW_16CSP;
  		} else {
  			snd_printk(KERN_INFO PFX "warning - CSP chip not detected on soundcard #%i
  ", dev + 1);
  		}
  	}
  #endif
  #ifdef SNDRV_SBAWE_EMU8000
  	if (awe_port[dev] > 0) {
  		if ((err = snd_emu8000_new(card, 1, awe_port[dev],
  					   seq_ports[dev], NULL)) < 0) {
  			snd_printk(KERN_ERR PFX "fatal error - EMU-8000 synthesizer not detected at 0x%lx
  ", awe_port[dev]);
  
  			return err;
  		}
  	}
  #endif
  
  	/* setup Mic AGC */
  	spin_lock_irqsave(&chip->mixer_lock, flags);
  	snd_sbmixer_write(chip, SB_DSP4_MIC_AGC,
  		(snd_sbmixer_read(chip, SB_DSP4_MIC_AGC) & 0x01) |
  		(mic_agc[dev] ? 0x00 : 0x01));
  	spin_unlock_irqrestore(&chip->mixer_lock, flags);
  
  	if ((err = snd_card_register(card)) < 0)
  		return err;
  
  	return 0;
  }
  
  #ifdef CONFIG_PM
  static int snd_sb16_suspend(struct snd_card *card, pm_message_t state)
  {
  	struct snd_card_sb16 *acard = card->private_data;
  	struct snd_sb *chip = acard->chip;
  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
  	snd_pcm_suspend_all(chip->pcm);
  	snd_sbmixer_suspend(chip);
  	return 0;
  }
  
  static int snd_sb16_resume(struct snd_card *card)
  {
  	struct snd_card_sb16 *acard = card->private_data;
  	struct snd_sb *chip = acard->chip;
  
  	snd_sbdsp_reset(chip);
  	snd_sbmixer_resume(chip);
  	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
  	return 0;
  }
  #endif
  
  static int snd_sb16_isa_probe1(int dev, struct device *pdev)
  {
  	struct snd_card_sb16 *acard;
  	struct snd_card *card;
  	int err;
  
  	err = snd_sb16_card_new(dev, &card);
  	if (err < 0)
  		return err;
  
  	acard = card->private_data;
  	/* non-PnP FM port address is hardwired with base port address */
  	fm_port[dev] = port[dev];
  	/* block the 0x388 port to avoid PnP conflicts */
  	acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
  #ifdef SNDRV_SBAWE_EMU8000
  	/* non-PnP AWE port address is hardwired with base port address */
  	awe_port[dev] = port[dev] + 0x400;
  #endif
  
  	snd_card_set_dev(card, pdev);
  	if ((err = snd_sb16_probe(card, dev)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	dev_set_drvdata(pdev, card);
  	return 0;
  }
  
  
  static int snd_sb16_isa_match(struct device *pdev, unsigned int dev)
  {
  	return enable[dev] && !is_isapnp_selected(dev);
  }
  
  static int snd_sb16_isa_probe(struct device *pdev, unsigned int dev)
  {
  	int err;
  	static int possible_irqs[] = {5, 9, 10, 7, -1};
  	static int possible_dmas8[] = {1, 3, 0, -1};
  	static int possible_dmas16[] = {5, 6, 7, -1};
  
  	if (irq[dev] == SNDRV_AUTO_IRQ) {
  		if ((irq[dev] = snd_legacy_find_free_irq(possible_irqs)) < 0) {
  			snd_printk(KERN_ERR PFX "unable to find a free IRQ
  ");
  			return -EBUSY;
  		}
  	}
  	if (dma8[dev] == SNDRV_AUTO_DMA) {
  		if ((dma8[dev] = snd_legacy_find_free_dma(possible_dmas8)) < 0) {
  			snd_printk(KERN_ERR PFX "unable to find a free 8-bit DMA
  ");
  			return -EBUSY;
  		}
  	}
  	if (dma16[dev] == SNDRV_AUTO_DMA) {
  		if ((dma16[dev] = snd_legacy_find_free_dma(possible_dmas16)) < 0) {
  			snd_printk(KERN_ERR PFX "unable to find a free 16-bit DMA
  ");
  			return -EBUSY;
  		}
  	}
  
  	if (port[dev] != SNDRV_AUTO_PORT)
  		return snd_sb16_isa_probe1(dev, pdev);
  	else {
  		static int possible_ports[] = {0x220, 0x240, 0x260, 0x280};
  		int i;
  		for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
  			port[dev] = possible_ports[i];
  			err = snd_sb16_isa_probe1(dev, pdev);
  			if (! err)
  				return 0;
  		}
  		return err;
  	}
  }
  
  static int snd_sb16_isa_remove(struct device *pdev, unsigned int dev)
  {
  	snd_card_free(dev_get_drvdata(pdev));
  	return 0;
  }
  
  #ifdef CONFIG_PM
  static int snd_sb16_isa_suspend(struct device *dev, unsigned int n,
  				pm_message_t state)
  {
  	return snd_sb16_suspend(dev_get_drvdata(dev), state);
  }
  
  static int snd_sb16_isa_resume(struct device *dev, unsigned int n)
  {
  	return snd_sb16_resume(dev_get_drvdata(dev));
  }
  #endif
  
  #ifdef SNDRV_SBAWE
  #define DEV_NAME "sbawe"
  #else
  #define DEV_NAME "sb16"
  #endif
  
  static struct isa_driver snd_sb16_isa_driver = {
  	.match		= snd_sb16_isa_match,
  	.probe		= snd_sb16_isa_probe,
  	.remove		= snd_sb16_isa_remove,
  #ifdef CONFIG_PM
  	.suspend	= snd_sb16_isa_suspend,
  	.resume		= snd_sb16_isa_resume,
  #endif
  	.driver		= {
  		.name	= DEV_NAME
  	},
  };
  
  
  #ifdef CONFIG_PNP
  static int snd_sb16_pnp_detect(struct pnp_card_link *pcard,
  			       const struct pnp_card_device_id *pid)
  {
  	static int dev;
  	struct snd_card *card;
  	int res;
  
  	for ( ; dev < SNDRV_CARDS; dev++) {
  		if (!enable[dev] || !isapnp[dev])
  			continue;
  		res = snd_sb16_card_new(dev, &card);
  		if (res < 0)
  			return res;
  		snd_card_set_dev(card, &pcard->card->dev);
  		if ((res = snd_card_sb16_pnp(dev, card->private_data, pcard, pid)) < 0 ||
  		    (res = snd_sb16_probe(card, dev)) < 0) {
  			snd_card_free(card);
  			return res;
  		}
  		pnp_set_card_drvdata(pcard, card);
  		dev++;
  		return 0;
  	}
  
  	return -ENODEV;
  }
  
  static void snd_sb16_pnp_remove(struct pnp_card_link *pcard)
  {
  	snd_card_free(pnp_get_card_drvdata(pcard));
  	pnp_set_card_drvdata(pcard, NULL);
  }
  
  #ifdef CONFIG_PM
  static int snd_sb16_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
  {
  	return snd_sb16_suspend(pnp_get_card_drvdata(pcard), state);
  }
  static int snd_sb16_pnp_resume(struct pnp_card_link *pcard)
  {
  	return snd_sb16_resume(pnp_get_card_drvdata(pcard));
  }
  #endif
  
  static struct pnp_card_driver sb16_pnpc_driver = {
  	.flags = PNP_DRIVER_RES_DISABLE,
  #ifdef SNDRV_SBAWE
  	.name = "sbawe",
  #else
  	.name = "sb16",
  #endif
  	.id_table = snd_sb16_pnpids,
  	.probe = snd_sb16_pnp_detect,
  	.remove = snd_sb16_pnp_remove,
  #ifdef CONFIG_PM
  	.suspend = snd_sb16_pnp_suspend,
  	.resume = snd_sb16_pnp_resume,
  #endif
  };
  
  #endif /* CONFIG_PNP */
  
  static int __init alsa_card_sb16_init(void)
  {
  	int err;
  
  	err = isa_register_driver(&snd_sb16_isa_driver, SNDRV_CARDS);
  #ifdef CONFIG_PNP
  	if (!err)
  		isa_registered = 1;
  
  	err = pnp_register_card_driver(&sb16_pnpc_driver);
  	if (!err)
  		pnp_registered = 1;
  
  	if (isa_registered)
  		err = 0;
  #endif
  	return err;
  }
  
  static void __exit alsa_card_sb16_exit(void)
  {
  #ifdef CONFIG_PNP
  	if (pnp_registered)
  		pnp_unregister_card_driver(&sb16_pnpc_driver);
  	if (isa_registered)
  #endif
  		isa_unregister_driver(&snd_sb16_isa_driver);
  }
  
  module_init(alsa_card_sb16_init)
  module_exit(alsa_card_sb16_exit)