text: /*
   *   ALSA modem driver for Intel ICH (i8x0) chipsets
   *
   *	Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   *
   *   This is modified (by Sasha Khapyorsky <sashak@alsa-project.org>) version
   *   of ALSA ICH sound driver intel8x0.c .
   *
   *
   *   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/io.h>
  #include <linux/delay.h>
  #include <linux/interrupt.h>
  #include <linux/init.h>
  #include <linux/pci.h>
  #include <linux/slab.h>
  #include <linux/module.h>
  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/ac97_codec.h>
  #include <sound/info.h>
  #include <sound/initval.h>
  
  MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  MODULE_DESCRIPTION("Intel 82801AA,82901AB,i810,i820,i830,i840,i845,MX440; "
  		   "SiS 7013; NVidia MCP/2/2S/3 modems");
  MODULE_LICENSE("GPL");
  MODULE_SUPPORTED_DEVICE("{{Intel,82801AA-ICH},"
  		"{Intel,82901AB-ICH0},"
  		"{Intel,82801BA-ICH2},"
  		"{Intel,82801CA-ICH3},"
  		"{Intel,82801DB-ICH4},"
  		"{Intel,ICH5},"
  		"{Intel,ICH6},"
  		"{Intel,ICH7},"
  	        "{Intel,MX440},"
  		"{SiS,7013},"
  		"{NVidia,NForce Modem},"
  		"{NVidia,NForce2 Modem},"
  		"{NVidia,NForce2s Modem},"
  		"{NVidia,NForce3 Modem},"
  		"{AMD,AMD768}}");
  
  static int index = -2; /* Exclude the first card */
  static char *id = SNDRV_DEFAULT_STR1;	/* ID for this card */
  static int ac97_clock;
  
  module_param(index, int, 0444);
  MODULE_PARM_DESC(index, "Index value for Intel i8x0 modemcard.");
  module_param(id, charp, 0444);
  MODULE_PARM_DESC(id, "ID string for Intel i8x0 modemcard.");
  module_param(ac97_clock, int, 0444);
  MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (0 = auto-detect).");
  
  /* just for backward compatibility */
  static bool enable;
  module_param(enable, bool, 0444);
  
  /*
   *  Direct registers
   */
  enum { DEVICE_INTEL, DEVICE_SIS, DEVICE_ALI, DEVICE_NFORCE };
  
  #define ICHREG(x) ICH_REG_##x
  
  #define DEFINE_REGSET(name,base) \
  enum { \
  	ICH_REG_##name##_BDBAR	= base + 0x0,	/* dword - buffer descriptor list base address */ \
  	ICH_REG_##name##_CIV	= base + 0x04,	/* byte - current index value */ \
  	ICH_REG_##name##_LVI	= base + 0x05,	/* byte - last valid index */ \
  	ICH_REG_##name##_SR	= base + 0x06,	/* byte - status register */ \
  	ICH_REG_##name##_PICB	= base + 0x08,	/* word - position in current buffer */ \
  	ICH_REG_##name##_PIV	= base + 0x0a,	/* byte - prefetched index value */ \
  	ICH_REG_##name##_CR	= base + 0x0b,	/* byte - control register */ \
  };
  
  /* busmaster blocks */
  DEFINE_REGSET(OFF, 0);		/* offset */
  
  /* values for each busmaster block */
  
  /* LVI */
  #define ICH_REG_LVI_MASK		0x1f
  
  /* SR */
  #define ICH_FIFOE			0x10	/* FIFO error */
  #define ICH_BCIS			0x08	/* buffer completion interrupt status */
  #define ICH_LVBCI			0x04	/* last valid buffer completion interrupt */
  #define ICH_CELV			0x02	/* current equals last valid */
  #define ICH_DCH				0x01	/* DMA controller halted */
  
  /* PIV */
  #define ICH_REG_PIV_MASK		0x1f	/* mask */
  
  /* CR */
  #define ICH_IOCE			0x10	/* interrupt on completion enable */
  #define ICH_FEIE			0x08	/* fifo error interrupt enable */
  #define ICH_LVBIE			0x04	/* last valid buffer interrupt enable */
  #define ICH_RESETREGS			0x02	/* reset busmaster registers */
  #define ICH_STARTBM			0x01	/* start busmaster operation */
  
  
  /* global block */
  #define ICH_REG_GLOB_CNT		0x3c	/* dword - global control */
  #define   ICH_TRIE		0x00000040	/* tertiary resume interrupt enable */
  #define   ICH_SRIE		0x00000020	/* secondary resume interrupt enable */
  #define   ICH_PRIE		0x00000010	/* primary resume interrupt enable */
  #define   ICH_ACLINK		0x00000008	/* AClink shut off */
  #define   ICH_AC97WARM		0x00000004	/* AC'97 warm reset */
  #define   ICH_AC97COLD		0x00000002	/* AC'97 cold reset */
  #define   ICH_GIE		0x00000001	/* GPI interrupt enable */
  #define ICH_REG_GLOB_STA		0x40	/* dword - global status */
  #define   ICH_TRI		0x20000000	/* ICH4: tertiary (AC_SDIN2) resume interrupt */
  #define   ICH_TCR		0x10000000	/* ICH4: tertiary (AC_SDIN2) codec ready */
  #define   ICH_BCS		0x08000000	/* ICH4: bit clock stopped */
  #define   ICH_SPINT		0x04000000	/* ICH4: S/PDIF interrupt */
  #define   ICH_P2INT		0x02000000	/* ICH4: PCM2-In interrupt */
  #define   ICH_M2INT		0x01000000	/* ICH4: Mic2-In interrupt */
  #define   ICH_SAMPLE_CAP	0x00c00000	/* ICH4: sample capability bits (RO) */
  #define   ICH_MULTICHAN_CAP	0x00300000	/* ICH4: multi-channel capability bits (RO) */
  #define   ICH_MD3		0x00020000	/* modem power down semaphore */
  #define   ICH_AD3		0x00010000	/* audio power down semaphore */
  #define   ICH_RCS		0x00008000	/* read completion status */
  #define   ICH_BIT3		0x00004000	/* bit 3 slot 12 */
  #define   ICH_BIT2		0x00002000	/* bit 2 slot 12 */
  #define   ICH_BIT1		0x00001000	/* bit 1 slot 12 */
  #define   ICH_SRI		0x00000800	/* secondary (AC_SDIN1) resume interrupt */
  #define   ICH_PRI		0x00000400	/* primary (AC_SDIN0) resume interrupt */
  #define   ICH_SCR		0x00000200	/* secondary (AC_SDIN1) codec ready */
  #define   ICH_PCR		0x00000100	/* primary (AC_SDIN0) codec ready */
  #define   ICH_MCINT		0x00000080	/* MIC capture interrupt */
  #define   ICH_POINT		0x00000040	/* playback interrupt */
  #define   ICH_PIINT		0x00000020	/* capture interrupt */
  #define   ICH_NVSPINT		0x00000010	/* nforce spdif interrupt */
  #define   ICH_MOINT		0x00000004	/* modem playback interrupt */
  #define   ICH_MIINT		0x00000002	/* modem capture interrupt */
  #define   ICH_GSCI		0x00000001	/* GPI status change interrupt */
  #define ICH_REG_ACC_SEMA		0x44	/* byte - codec write semaphore */
  #define   ICH_CAS		0x01		/* codec access semaphore */
  
  #define ICH_MAX_FRAGS		32		/* max hw frags */
  
  
  /*
   *  
   */
  
  enum { ICHD_MDMIN, ICHD_MDMOUT, ICHD_MDMLAST = ICHD_MDMOUT };
  enum { ALID_MDMIN, ALID_MDMOUT, ALID_MDMLAST = ALID_MDMOUT };
  
  #define get_ichdev(substream) (substream->runtime->private_data)
  
  struct ichdev {
  	unsigned int ichd;			/* ich device number */
  	unsigned long reg_offset;		/* offset to bmaddr */
  	u32 *bdbar;				/* CPU address (32bit) */
  	unsigned int bdbar_addr;		/* PCI bus address (32bit) */
  	struct snd_pcm_substream *substream;
  	unsigned int physbuf;			/* physical address (32bit) */
          unsigned int size;
          unsigned int fragsize;
          unsigned int fragsize1;
          unsigned int position;
          int frags;
          int lvi;
          int lvi_frag;
  	int civ;
  	int ack;
  	int ack_reload;
  	unsigned int ack_bit;
  	unsigned int roff_sr;
  	unsigned int roff_picb;
  	unsigned int int_sta_mask;		/* interrupt status mask */
  	unsigned int ali_slot;			/* ALI DMA slot */
  	struct snd_ac97 *ac97;
  };
  
  struct intel8x0m {
  	unsigned int device_type;
  
  	int irq;
  
  	void __iomem *addr;
  	void __iomem *bmaddr;
  
  	struct pci_dev *pci;
  	struct snd_card *card;
  
  	int pcm_devs;
  	struct snd_pcm *pcm[2];
  	struct ichdev ichd[2];
  
  	unsigned int in_ac97_init: 1;
  
  	struct snd_ac97_bus *ac97_bus;
  	struct snd_ac97 *ac97;
  
  	spinlock_t reg_lock;
  	
  	struct snd_dma_buffer bdbars;
  	u32 bdbars_count;
  	u32 int_sta_reg;		/* interrupt status register */
  	u32 int_sta_mask;		/* interrupt status mask */
  	unsigned int pcm_pos_shift;
  };
  
  static DEFINE_PCI_DEVICE_TABLE(snd_intel8x0m_ids) = {
  	{ PCI_VDEVICE(INTEL, 0x2416), DEVICE_INTEL },	/* 82801AA */
  	{ PCI_VDEVICE(INTEL, 0x2426), DEVICE_INTEL },	/* 82901AB */
  	{ PCI_VDEVICE(INTEL, 0x2446), DEVICE_INTEL },	/* 82801BA */
  	{ PCI_VDEVICE(INTEL, 0x2486), DEVICE_INTEL },	/* ICH3 */
  	{ PCI_VDEVICE(INTEL, 0x24c6), DEVICE_INTEL }, /* ICH4 */
  	{ PCI_VDEVICE(INTEL, 0x24d6), DEVICE_INTEL }, /* ICH5 */
  	{ PCI_VDEVICE(INTEL, 0x266d), DEVICE_INTEL },	/* ICH6 */
  	{ PCI_VDEVICE(INTEL, 0x27dd), DEVICE_INTEL },	/* ICH7 */
  	{ PCI_VDEVICE(INTEL, 0x7196), DEVICE_INTEL },	/* 440MX */
  	{ PCI_VDEVICE(AMD, 0x7446), DEVICE_INTEL },	/* AMD768 */
  	{ PCI_VDEVICE(SI, 0x7013), DEVICE_SIS },	/* SI7013 */
  	{ PCI_VDEVICE(NVIDIA, 0x01c1), DEVICE_NFORCE }, /* NFORCE */
  	{ PCI_VDEVICE(NVIDIA, 0x0069), DEVICE_NFORCE }, /* NFORCE2 */
  	{ PCI_VDEVICE(NVIDIA, 0x0089), DEVICE_NFORCE }, /* NFORCE2s */
  	{ PCI_VDEVICE(NVIDIA, 0x00d9), DEVICE_NFORCE }, /* NFORCE3 */
  	{ PCI_VDEVICE(AMD, 0x746e), DEVICE_INTEL },	/* AMD8111 */
  #if 0
  	{ PCI_VDEVICE(AL, 0x5455), DEVICE_ALI },   /* Ali5455 */
  #endif
  	{ 0, }
  };
  
  MODULE_DEVICE_TABLE(pci, snd_intel8x0m_ids);
  
  /*
   *  Lowlevel I/O - busmaster
   */
  
  static inline u8 igetbyte(struct intel8x0m *chip, u32 offset)
  {
  	return ioread8(chip->bmaddr + offset);
  }
  
  static inline u16 igetword(struct intel8x0m *chip, u32 offset)
  {
  	return ioread16(chip->bmaddr + offset);
  }
  
  static inline u32 igetdword(struct intel8x0m *chip, u32 offset)
  {
  	return ioread32(chip->bmaddr + offset);
  }
  
  static inline void iputbyte(struct intel8x0m *chip, u32 offset, u8 val)
  {
  	iowrite8(val, chip->bmaddr + offset);
  }
  
  static inline void iputword(struct intel8x0m *chip, u32 offset, u16 val)
  {
  	iowrite16(val, chip->bmaddr + offset);
  }
  
  static inline void iputdword(struct intel8x0m *chip, u32 offset, u32 val)
  {
  	iowrite32(val, chip->bmaddr + offset);
  }
  
  /*
   *  Lowlevel I/O - AC'97 registers
   */
  
  static inline u16 iagetword(struct intel8x0m *chip, u32 offset)
  {
  	return ioread16(chip->addr + offset);
  }
  
  static inline void iaputword(struct intel8x0m *chip, u32 offset, u16 val)
  {
  	iowrite16(val, chip->addr + offset);
  }
  
  /*
   *  Basic I/O
   */
  
  /*
   * access to AC97 codec via normal i/o (for ICH and SIS7013)
   */
  
  /* return the GLOB_STA bit for the corresponding codec */
  static unsigned int get_ich_codec_bit(struct intel8x0m *chip, unsigned int codec)
  {
  	static unsigned int codec_bit[3] = {
  		ICH_PCR, ICH_SCR, ICH_TCR
  	};
  	if (snd_BUG_ON(codec >= 3))
  		return ICH_PCR;
  	return codec_bit[codec];
  }
  
  static int snd_intel8x0m_codec_semaphore(struct intel8x0m *chip, unsigned int codec)
  {
  	int time;
  	
  	if (codec > 1)
  		return -EIO;
  	codec = get_ich_codec_bit(chip, codec);
  
  	/* codec ready ? */
  	if ((igetdword(chip, ICHREG(GLOB_STA)) & codec) == 0)
  		return -EIO;
  
  	/* Anyone holding a semaphore for 1 msec should be shot... */
  	time = 100;
        	do {
        		if (!(igetbyte(chip, ICHREG(ACC_SEMA)) & ICH_CAS))
        			return 0;
  		udelay(10);
  	} while (time--);
  
  	/* access to some forbidden (non existent) ac97 registers will not
  	 * reset the semaphore. So even if you don't get the semaphore, still
  	 * continue the access. We don't need the semaphore anyway. */
  	snd_printk(KERN_ERR "codec_semaphore: semaphore is not ready [0x%x][0x%x]\n",
  			igetbyte(chip, ICHREG(ACC_SEMA)), igetdword(chip, ICHREG(GLOB_STA)));
  	iagetword(chip, 0);	/* clear semaphore flag */
  	/* I don't care about the semaphore */
  	return -EBUSY;
  }
   
  static void snd_intel8x0m_codec_write(struct snd_ac97 *ac97,
  				      unsigned short reg,
  				      unsigned short val)
  {
  	struct intel8x0m *chip = ac97->private_data;
  	
  	if (snd_intel8x0m_codec_semaphore(chip, ac97->num) < 0) {
  		if (! chip->in_ac97_init)
  			snd_printk(KERN_ERR "codec_write %d: semaphore is not ready for register 0x%x\n", ac97->num, reg);
  	}
  	iaputword(chip, reg + ac97->num * 0x80, val);
  }
  
  static unsigned short snd_intel8x0m_codec_read(struct snd_ac97 *ac97,
  					       unsigned short reg)
  {
  	struct intel8x0m *chip = ac97->private_data;
  	unsigned short res;
  	unsigned int tmp;
  
  	if (snd_intel8x0m_codec_semaphore(chip, ac97->num) < 0) {
  		if (! chip->in_ac97_init)
  			snd_printk(KERN_ERR "codec_read %d: semaphore is not ready for register 0x%x\n", ac97->num, reg);
  		res = 0xffff;
  	} else {
  		res = iagetword(chip, reg + ac97->num * 0x80);
  		if ((tmp = igetdword(chip, ICHREG(GLOB_STA))) & ICH_RCS) {
  			/* reset RCS and preserve other R/WC bits */
  			iputdword(chip, ICHREG(GLOB_STA),
  				  tmp & ~(ICH_SRI|ICH_PRI|ICH_TRI|ICH_GSCI));
  			if (! chip->in_ac97_init)
  				snd_printk(KERN_ERR "codec_read %d: read timeout for register 0x%x\n", ac97->num, reg);
  			res = 0xffff;
  		}
  	}
  	if (reg == AC97_GPIO_STATUS)
  		iagetword(chip, 0); /* clear semaphore */
  	return res;
  }
  
  
  /*
   * DMA I/O
   */
  static void snd_intel8x0m_setup_periods(struct intel8x0m *chip, struct ichdev *ichdev)
  {
  	int idx;
  	u32 *bdbar = ichdev->bdbar;
  	unsigned long port = ichdev->reg_offset;
  
  	iputdword(chip, port + ICH_REG_OFF_BDBAR, ichdev->bdbar_addr);
  	if (ichdev->size == ichdev->fragsize) {
  		ichdev->ack_reload = ichdev->ack = 2;
  		ichdev->fragsize1 = ichdev->fragsize >> 1;
  		for (idx = 0; idx < (ICH_REG_LVI_MASK + 1) * 2; idx += 4) {
  			bdbar[idx + 0] = cpu_to_le32(ichdev->physbuf);
  			bdbar[idx + 1] = cpu_to_le32(0x80000000 | /* interrupt on completion */
  						     ichdev->fragsize1 >> chip->pcm_pos_shift);
  			bdbar[idx + 2] = cpu_to_le32(ichdev->physbuf + (ichdev->size >> 1));
  			bdbar[idx + 3] = cpu_to_le32(0x80000000 | /* interrupt on completion */
  						     ichdev->fragsize1 >> chip->pcm_pos_shift);
  		}
  		ichdev->frags = 2;
  	} else {
  		ichdev->ack_reload = ichdev->ack = 1;
  		ichdev->fragsize1 = ichdev->fragsize;
  		for (idx = 0; idx < (ICH_REG_LVI_MASK + 1) * 2; idx += 2) {
  			bdbar[idx + 0] = cpu_to_le32(ichdev->physbuf + (((idx >> 1) * ichdev->fragsize) % ichdev->size));
  			bdbar[idx + 1] = cpu_to_le32(0x80000000 | /* interrupt on completion */
  						     ichdev->fragsize >> chip->pcm_pos_shift);
  			/*
  			printk(KERN_DEBUG "bdbar[%i] = 0x%x [0x%x]\n",
  			       idx + 0, bdbar[idx + 0], bdbar[idx + 1]);
  			*/
  		}
  		ichdev->frags = ichdev->size / ichdev->fragsize;
  	}
  	iputbyte(chip, port + ICH_REG_OFF_LVI, ichdev->lvi = ICH_REG_LVI_MASK);
  	ichdev->civ = 0;
  	iputbyte(chip, port + ICH_REG_OFF_CIV, 0);
  	ichdev->lvi_frag = ICH_REG_LVI_MASK % ichdev->frags;
  	ichdev->position = 0;
  #if 0
  	printk(KERN_DEBUG "lvi_frag = %i, frags = %i, period_size = 0x%x, "
  	       "period_size1 = 0x%x\n",
  	       ichdev->lvi_frag, ichdev->frags, ichdev->fragsize,
  	       ichdev->fragsize1);
  #endif
  	/* clear interrupts */
  	iputbyte(chip, port + ichdev->roff_sr, ICH_FIFOE | ICH_BCIS | ICH_LVBCI);
  }
  
  /*
   *  Interrupt handler
   */
  
  static inline void snd_intel8x0m_update(struct intel8x0m *chip, struct ichdev *ichdev)
  {
  	unsigned long port = ichdev->reg_offset;
  	int civ, i, step;
  	int ack = 0;
  
  	civ = igetbyte(chip, port + ICH_REG_OFF_CIV);
  	if (civ == ichdev->civ) {
  		// snd_printd("civ same %d\n", civ);
  		step = 1;
  		ichdev->civ++;
  		ichdev->civ &= ICH_REG_LVI_MASK;
  	} else {
  		step = civ - ichdev->civ;
  		if (step < 0)
  			step += ICH_REG_LVI_MASK + 1;
  		// if (step != 1)
  		//	snd_printd("step = %d, %d -> %d\n", step, ichdev->civ, civ);
  		ichdev->civ = civ;
  	}
  
  	ichdev->position += step * ichdev->fragsize1;
  	ichdev->position %= ichdev->size;
  	ichdev->lvi += step;
  	ichdev->lvi &= ICH_REG_LVI_MASK;
  	iputbyte(chip, port + ICH_REG_OFF_LVI, ichdev->lvi);
  	for (i = 0; i < step; i++) {
  		ichdev->lvi_frag++;
  		ichdev->lvi_frag %= ichdev->frags;
  		ichdev->bdbar[ichdev->lvi * 2] = cpu_to_le32(ichdev->physbuf +
  							     ichdev->lvi_frag *
  							     ichdev->fragsize1);
  #if 0
  		printk(KERN_DEBUG "new: bdbar[%i] = 0x%x [0x%x], "
  		       "prefetch = %i, all = 0x%x, 0x%x\n",
  		       ichdev->lvi * 2, ichdev->bdbar[ichdev->lvi * 2],
  		       ichdev->bdbar[ichdev->lvi * 2 + 1], inb(ICH_REG_OFF_PIV + port),
  		       inl(port + 4), inb(port + ICH_REG_OFF_CR));
  #endif
  		if (--ichdev->ack == 0) {
  			ichdev->ack = ichdev->ack_reload;
  			ack = 1;
  		}
  	}
  	if (ack && ichdev->substream) {
  		spin_unlock(&chip->reg_lock);
  		snd_pcm_period_elapsed(ichdev->substream);
  		spin_lock(&chip->reg_lock);
  	}
  	iputbyte(chip, port + ichdev->roff_sr, ICH_FIFOE | ICH_BCIS | ICH_LVBCI);
  }
  
  static irqreturn_t snd_intel8x0m_interrupt(int irq, void *dev_id)
  {
  	struct intel8x0m *chip = dev_id;
  	struct ichdev *ichdev;
  	unsigned int status;
  	unsigned int i;
  
  	spin_lock(&chip->reg_lock);
  	status = igetdword(chip, chip->int_sta_reg);
  	if (status == 0xffffffff) { /* we are not yet resumed */
  		spin_unlock(&chip->reg_lock);
  		return IRQ_NONE;
  	}
  	if ((status & chip->int_sta_mask) == 0) {
  		if (status)
  			iputdword(chip, chip->int_sta_reg, status);
  		spin_unlock(&chip->reg_lock);
  		return IRQ_NONE;
  	}
  
  	for (i = 0; i < chip->bdbars_count; i++) {
  		ichdev = &chip->ichd[i];
  		if (status & ichdev->int_sta_mask)
  			snd_intel8x0m_update(chip, ichdev);
  	}
  
  	/* ack them */
  	iputdword(chip, chip->int_sta_reg, status & chip->int_sta_mask);
  	spin_unlock(&chip->reg_lock);
  	
  	return IRQ_HANDLED;
  }
  
  /*
   *  PCM part
   */
  
  static int snd_intel8x0m_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  	struct ichdev *ichdev = get_ichdev(substream);
  	unsigned char val = 0;
  	unsigned long port = ichdev->reg_offset;
  
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  	case SNDRV_PCM_TRIGGER_RESUME:
  		val = ICH_IOCE | ICH_STARTBM;
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  	case SNDRV_PCM_TRIGGER_SUSPEND:
  		val = 0;
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  		val = ICH_IOCE;
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  		val = ICH_IOCE | ICH_STARTBM;
  		break;
  	default:
  		return -EINVAL;
  	}
  	iputbyte(chip, port + ICH_REG_OFF_CR, val);
  	if (cmd == SNDRV_PCM_TRIGGER_STOP) {
  		/* wait until DMA stopped */
  		while (!(igetbyte(chip, port + ichdev->roff_sr) & ICH_DCH)) ;
  		/* reset whole DMA things */
  		iputbyte(chip, port + ICH_REG_OFF_CR, ICH_RESETREGS);
  	}
  	return 0;
  }
  
  static int snd_intel8x0m_hw_params(struct snd_pcm_substream *substream,
  				  struct snd_pcm_hw_params *hw_params)
  {
  	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
  }
  
  static int snd_intel8x0m_hw_free(struct snd_pcm_substream *substream)
  {
  	return snd_pcm_lib_free_pages(substream);
  }
  
  static snd_pcm_uframes_t snd_intel8x0m_pcm_pointer(struct snd_pcm_substream *substream)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  	struct ichdev *ichdev = get_ichdev(substream);
  	size_t ptr1, ptr;
  
  	ptr1 = igetword(chip, ichdev->reg_offset + ichdev->roff_picb) << chip->pcm_pos_shift;
  	if (ptr1 != 0)
  		ptr = ichdev->fragsize1 - ptr1;
  	else
  		ptr = 0;
  	ptr += ichdev->position;
  	if (ptr >= ichdev->size)
  		return 0;
  	return bytes_to_frames(substream->runtime, ptr);
  }
  
  static int snd_intel8x0m_pcm_prepare(struct snd_pcm_substream *substream)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;
  	struct ichdev *ichdev = get_ichdev(substream);
  
  	ichdev->physbuf = runtime->dma_addr;
  	ichdev->size = snd_pcm_lib_buffer_bytes(substream);
  	ichdev->fragsize = snd_pcm_lib_period_bytes(substream);
  	snd_ac97_write(ichdev->ac97, AC97_LINE1_RATE, runtime->rate);
  	snd_ac97_write(ichdev->ac97, AC97_LINE1_LEVEL, 0);
  	snd_intel8x0m_setup_periods(chip, ichdev);
  	return 0;
  }
  
  static struct snd_pcm_hardware snd_intel8x0m_stream =
  {
  	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
  				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  				 SNDRV_PCM_INFO_MMAP_VALID |
  				 SNDRV_PCM_INFO_PAUSE |
  				 SNDRV_PCM_INFO_RESUME),
  	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
  	.rates =		SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
  	.rate_min =		8000,
  	.rate_max =		16000,
  	.channels_min =		1,
  	.channels_max =		1,
  	.buffer_bytes_max =	64 * 1024,
  	.period_bytes_min =	32,
  	.period_bytes_max =	64 * 1024,
  	.periods_min =		1,
  	.periods_max =		1024,
  	.fifo_size =		0,
  };
  
  
  static int snd_intel8x0m_pcm_open(struct snd_pcm_substream *substream, struct ichdev *ichdev)
  {
  	static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
  	static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
  		.count = ARRAY_SIZE(rates),
  		.list = rates,
  		.mask = 0,
  	};
  	struct snd_pcm_runtime *runtime = substream->runtime;
  	int err;
  
  	ichdev->substream = substream;
  	runtime->hw = snd_intel8x0m_stream;
  	err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
  					 &hw_constraints_rates);
  	if ( err < 0 )
  		return err;
  	runtime->private_data = ichdev;
  	return 0;
  }
  
  static int snd_intel8x0m_playback_open(struct snd_pcm_substream *substream)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  
  	return snd_intel8x0m_pcm_open(substream, &chip->ichd[ICHD_MDMOUT]);
  }
  
  static int snd_intel8x0m_playback_close(struct snd_pcm_substream *substream)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  
  	chip->ichd[ICHD_MDMOUT].substream = NULL;
  	return 0;
  }
  
  static int snd_intel8x0m_capture_open(struct snd_pcm_substream *substream)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  
  	return snd_intel8x0m_pcm_open(substream, &chip->ichd[ICHD_MDMIN]);
  }
  
  static int snd_intel8x0m_capture_close(struct snd_pcm_substream *substream)
  {
  	struct intel8x0m *chip = snd_pcm_substream_chip(substream);
  
  	chip->ichd[ICHD_MDMIN].substream = NULL;
  	return 0;
  }
  
  
  static struct snd_pcm_ops snd_intel8x0m_playback_ops = {
  	.open =		snd_intel8x0m_playback_open,
  	.close =	snd_intel8x0m_playback_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_intel8x0m_hw_params,
  	.hw_free =	snd_intel8x0m_hw_free,
  	.prepare =	snd_intel8x0m_pcm_prepare,
  	.trigger =	snd_intel8x0m_pcm_trigger,
  	.pointer =	snd_intel8x0m_pcm_pointer,
  };
  
  static struct snd_pcm_ops snd_intel8x0m_capture_ops = {
  	.open =		snd_intel8x0m_capture_open,
  	.close =	snd_intel8x0m_capture_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_intel8x0m_hw_params,
  	.hw_free =	snd_intel8x0m_hw_free,
  	.prepare =	snd_intel8x0m_pcm_prepare,
  	.trigger =	snd_intel8x0m_pcm_trigger,
  	.pointer =	snd_intel8x0m_pcm_pointer,
  };
  
  
  struct ich_pcm_table {
  	char *suffix;
  	struct snd_pcm_ops *playback_ops;
  	struct snd_pcm_ops *capture_ops;
  	size_t prealloc_size;
  	size_t prealloc_max_size;
  	int ac97_idx;
  };
  
  static int snd_intel8x0m_pcm1(struct intel8x0m *chip, int device,
  			      struct ich_pcm_table *rec)
  {
  	struct snd_pcm *pcm;
  	int err;
  	char name[32];
  
  	if (rec->suffix)
  		sprintf(name, "Intel ICH - %s", rec->suffix);
  	else
  		strcpy(name, "Intel ICH");
  	err = snd_pcm_new(chip->card, name, device,
  			  rec->playback_ops ? 1 : 0,
  			  rec->capture_ops ? 1 : 0, &pcm);
  	if (err < 0)
  		return err;
  
  	if (rec->playback_ops)
  		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, rec->playback_ops);
  	if (rec->capture_ops)
  		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, rec->capture_ops);
  
  	pcm->private_data = chip;
  	pcm->info_flags = 0;
  	pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
  	if (rec->suffix)
  		sprintf(pcm->name, "%s - %s", chip->card->shortname, rec->suffix);
  	else
  		strcpy(pcm->name, chip->card->shortname);
  	chip->pcm[device] = pcm;
  
  	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
  					      snd_dma_pci_data(chip->pci),
  					      rec->prealloc_size,
  					      rec->prealloc_max_size);
  
  	return 0;
  }
  
  static struct ich_pcm_table intel_pcms[] = {
  	{
  		.suffix = "Modem",
  		.playback_ops = &snd_intel8x0m_playback_ops,
  		.capture_ops = &snd_intel8x0m_capture_ops,
  		.prealloc_size = 32 * 1024,
  		.prealloc_max_size = 64 * 1024,
  	},
  };
  
  static int snd_intel8x0m_pcm(struct intel8x0m *chip)
  {
  	int i, tblsize, device, err;
  	struct ich_pcm_table *tbl, *rec;
  
  #if 1
  	tbl = intel_pcms;
  	tblsize = 1;
  #else
  	switch (chip->device_type) {
  	case DEVICE_NFORCE:
  		tbl = nforce_pcms;
  		tblsize = ARRAY_SIZE(nforce_pcms);
  		break;
  	case DEVICE_ALI:
  		tbl = ali_pcms;
  		tblsize = ARRAY_SIZE(ali_pcms);
  		break;
  	default:
  		tbl = intel_pcms;
  		tblsize = 2;
  		break;
  	}
  #endif
  	device = 0;
  	for (i = 0; i < tblsize; i++) {
  		rec = tbl + i;
  		if (i > 0 && rec->ac97_idx) {
  			/* activate PCM only when associated AC'97 codec */
  			if (! chip->ichd[rec->ac97_idx].ac97)
  				continue;
  		}
  		err = snd_intel8x0m_pcm1(chip, device, rec);
  		if (err < 0)
  			return err;
  		device++;
  	}
  
  	chip->pcm_devs = device;
  	return 0;
  }
  	
  
  /*
   *  Mixer part
   */
  
  static void snd_intel8x0m_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
  {
  	struct intel8x0m *chip = bus->private_data;
  	chip->ac97_bus = NULL;
  }
  
  static void snd_intel8x0m_mixer_free_ac97(struct snd_ac97 *ac97)
  {
  	struct intel8x0m *chip = ac97->private_data;
  	chip->ac97 = NULL;
  }
  
  
  static int snd_intel8x0m_mixer(struct intel8x0m *chip, int ac97_clock)
  {
  	struct snd_ac97_bus *pbus;
  	struct snd_ac97_template ac97;
  	struct snd_ac97 *x97;
  	int err;
  	unsigned int glob_sta = 0;
  	static struct snd_ac97_bus_ops ops = {
  		.write = snd_intel8x0m_codec_write,
  		.read = snd_intel8x0m_codec_read,
  	};
  
  	chip->in_ac97_init = 1;
  	
  	memset(&ac97, 0, sizeof(ac97));
  	ac97.private_data = chip;
  	ac97.private_free = snd_intel8x0m_mixer_free_ac97;
  	ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
  
  	glob_sta = igetdword(chip, ICHREG(GLOB_STA));
  
  	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
  		goto __err;
  	pbus->private_free = snd_intel8x0m_mixer_free_ac97_bus;
  	if (ac97_clock >= 8000 && ac97_clock <= 48000)
  		pbus->clock = ac97_clock;
  	chip->ac97_bus = pbus;
  
  	ac97.pci = chip->pci;
  	ac97.num = glob_sta & ICH_SCR ? 1 : 0;
  	if ((err = snd_ac97_mixer(pbus, &ac97, &x97)) < 0) {
  		snd_printk(KERN_ERR "Unable to initialize codec #%d\n", ac97.num);
  		if (ac97.num == 0)
  			goto __err;
  		return err;
  	}
  	chip->ac97 = x97;
  	if(ac97_is_modem(x97) && !chip->ichd[ICHD_MDMIN].ac97) {
  		chip->ichd[ICHD_MDMIN].ac97 = x97;
  		chip->ichd[ICHD_MDMOUT].ac97 = x97;
  	}
  
  	chip->in_ac97_init = 0;
  	return 0;
  
   __err:
  	/* clear the cold-reset bit for the next chance */
  	if (chip->device_type != DEVICE_ALI)
  		iputdword(chip, ICHREG(GLOB_CNT),
  			  igetdword(chip, ICHREG(GLOB_CNT)) & ~ICH_AC97COLD);
  	return err;
  }
  
  
  /*
   *
   */
  
  static int snd_intel8x0m_ich_chip_init(struct intel8x0m *chip, int probing)
  {
  	unsigned long end_time;
  	unsigned int cnt, status, nstatus;
  	
  	/* put logic to right state */
  	/* first clear status bits */
  	status = ICH_RCS | ICH_MIINT | ICH_MOINT;
  	cnt = igetdword(chip, ICHREG(GLOB_STA));
  	iputdword(chip, ICHREG(GLOB_STA), cnt & status);
  
  	/* ACLink on, 2 channels */
  	cnt = igetdword(chip, ICHREG(GLOB_CNT));
  	cnt &= ~(ICH_ACLINK);
  	/* finish cold or do warm reset */
  	cnt |= (cnt & ICH_AC97COLD) == 0 ? ICH_AC97COLD : ICH_AC97WARM;
  	iputdword(chip, ICHREG(GLOB_CNT), cnt);
  	usleep_range(500, 1000); /* give warm reset some time */
  	end_time = jiffies + HZ / 4;
  	do {
  		if ((igetdword(chip, ICHREG(GLOB_CNT)) & ICH_AC97WARM) == 0)
  			goto __ok;
  		schedule_timeout_uninterruptible(1);
  	} while (time_after_eq(end_time, jiffies));
  	snd_printk(KERN_ERR "AC'97 warm reset still in progress? [0x%x]\n",
  		   igetdword(chip, ICHREG(GLOB_CNT)));
  	return -EIO;
  
        __ok:
  	if (probing) {
  		/* wait for any codec ready status.
  		 * Once it becomes ready it should remain ready
  		 * as long as we do not disable the ac97 link.
  		 */
  		end_time = jiffies + HZ;
  		do {
  			status = igetdword(chip, ICHREG(GLOB_STA)) &
  				(ICH_PCR | ICH_SCR | ICH_TCR);
  			if (status)
  				break;
  			schedule_timeout_uninterruptible(1);
  		} while (time_after_eq(end_time, jiffies));
  		if (! status) {
  			/* no codec is found */
  			snd_printk(KERN_ERR "codec_ready: codec is not ready [0x%x]\n",
  				   igetdword(chip, ICHREG(GLOB_STA)));
  			return -EIO;
  		}
  
  		/* up to two codecs (modem cannot be tertiary with ICH4) */
  		nstatus = ICH_PCR | ICH_SCR;
  
  		/* wait for other codecs ready status. */
  		end_time = jiffies + HZ / 4;
  		while (status != nstatus && time_after_eq(end_time, jiffies)) {
  			schedule_timeout_uninterruptible(1);
  			status |= igetdword(chip, ICHREG(GLOB_STA)) & nstatus;
  		}
  
  	} else {
  		/* resume phase */
  		status = 0;
  		if (chip->ac97)
  			status |= get_ich_codec_bit(chip, chip->ac97->num);
  		/* wait until all the probed codecs are ready */
  		end_time = jiffies + HZ;
  		do {
  			nstatus = igetdword(chip, ICHREG(GLOB_STA)) &
  				(ICH_PCR | ICH_SCR | ICH_TCR);
  			if (status == nstatus)
  				break;
  			schedule_timeout_uninterruptible(1);
  		} while (time_after_eq(end_time, jiffies));
  	}
  
  	if (chip->device_type == DEVICE_SIS) {
  		/* unmute the output on SIS7012 */
  		iputword(chip, 0x4c, igetword(chip, 0x4c) | 1);
  	}
  
        	return 0;
  }
  
  static int snd_intel8x0m_chip_init(struct intel8x0m *chip, int probing)
  {
  	unsigned int i;
  	int err;
  	
  	if ((err = snd_intel8x0m_ich_chip_init(chip, probing)) < 0)
  		return err;
  	iagetword(chip, 0);	/* clear semaphore flag */
  
  	/* disable interrupts */
  	for (i = 0; i < chip->bdbars_count; i++)
  		iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, 0x00);
  	/* reset channels */
  	for (i = 0; i < chip->bdbars_count; i++)
  		iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, ICH_RESETREGS);
  	/* initialize Buffer Descriptor Lists */
  	for (i = 0; i < chip->bdbars_count; i++)
  		iputdword(chip, ICH_REG_OFF_BDBAR + chip->ichd[i].reg_offset, chip->ichd[i].bdbar_addr);
  	return 0;
  }
  
  static int snd_intel8x0m_free(struct intel8x0m *chip)
  {
  	unsigned int i;
  
  	if (chip->irq < 0)
  		goto __hw_end;
  	/* disable interrupts */
  	for (i = 0; i < chip->bdbars_count; i++)
  		iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, 0x00);
  	/* reset channels */
  	for (i = 0; i < chip->bdbars_count; i++)
  		iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, ICH_RESETREGS);
   __hw_end:
  	if (chip->irq >= 0)
  		free_irq(chip->irq, chip);
  	if (chip->bdbars.area)
  		snd_dma_free_pages(&chip->bdbars);
  	if (chip->addr)
  		pci_iounmap(chip->pci, chip->addr);
  	if (chip->bmaddr)
  		pci_iounmap(chip->pci, chip->bmaddr);
  	pci_release_regions(chip->pci);
  	pci_disable_device(chip->pci);
  	kfree(chip);
  	return 0;
  }
  
  #ifdef CONFIG_PM_SLEEP
  /*
   * power management
   */
  static int intel8x0m_suspend(struct device *dev)
  {
  	struct pci_dev *pci = to_pci_dev(dev);
  	struct snd_card *card = dev_get_drvdata(dev);
  	struct intel8x0m *chip = card->private_data;
  	int i;
  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
  	for (i = 0; i < chip->pcm_devs; i++)
  		snd_pcm_suspend_all(chip->pcm[i]);
  	snd_ac97_suspend(chip->ac97);
  	if (chip->irq >= 0) {
  		free_irq(chip->irq, chip);
  		chip->irq = -1;
  	}
  	pci_disable_device(pci);
  	pci_save_state(pci);
  	pci_set_power_state(pci, PCI_D3hot);
  	return 0;
  }
  
  static int intel8x0m_resume(struct device *dev)
  {
  	struct pci_dev *pci = to_pci_dev(dev);
  	struct snd_card *card = dev_get_drvdata(dev);
  	struct intel8x0m *chip = card->private_data;
  
  	pci_set_power_state(pci, PCI_D0);
  	pci_restore_state(pci);
  	if (pci_enable_device(pci) < 0) {
  		printk(KERN_ERR "intel8x0m: pci_enable_device failed, "
  		       "disabling device\n");
  		snd_card_disconnect(card);
  		return -EIO;
  	}
  	pci_set_master(pci);
  	if (request_irq(pci->irq, snd_intel8x0m_interrupt,
  			IRQF_SHARED, KBUILD_MODNAME, chip)) {
  		printk(KERN_ERR "intel8x0m: unable to grab IRQ %d, "
  		       "disabling device\n", pci->irq);
  		snd_card_disconnect(card);
  		return -EIO;
  	}
  	chip->irq = pci->irq;
  	snd_intel8x0m_chip_init(chip, 0);
  	snd_ac97_resume(chip->ac97);
  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
  	return 0;
  }
  
  static SIMPLE_DEV_PM_OPS(intel8x0m_pm, intel8x0m_suspend, intel8x0m_resume);
  #define INTEL8X0M_PM_OPS	&intel8x0m_pm
  #else
  #define INTEL8X0M_PM_OPS	NULL
  #endif /* CONFIG_PM_SLEEP */
  
  #ifdef CONFIG_PROC_FS
  static void snd_intel8x0m_proc_read(struct snd_info_entry * entry,
  				   struct snd_info_buffer *buffer)
  {
  	struct intel8x0m *chip = entry->private_data;
  	unsigned int tmp;
  
  	snd_iprintf(buffer, "Intel8x0m\n\n");
  	if (chip->device_type == DEVICE_ALI)
  		return;
  	tmp = igetdword(chip, ICHREG(GLOB_STA));
  	snd_iprintf(buffer, "Global control        : 0x%08x\n",
  		    igetdword(chip, ICHREG(GLOB_CNT)));
  	snd_iprintf(buffer, "Global status         : 0x%08x\n", tmp);
  	snd_iprintf(buffer, "AC'97 codecs ready    :%s%s%s%s\n",
  			tmp & ICH_PCR ? " primary" : "",
  			tmp & ICH_SCR ? " secondary" : "",
  			tmp & ICH_TCR ? " tertiary" : "",
  			(tmp & (ICH_PCR | ICH_SCR | ICH_TCR)) == 0 ? " none" : "");
  }
  
  static void snd_intel8x0m_proc_init(struct intel8x0m *chip)
  {
  	struct snd_info_entry *entry;
  
  	if (! snd_card_proc_new(chip->card, "intel8x0m", &entry))
  		snd_info_set_text_ops(entry, chip, snd_intel8x0m_proc_read);
  }
  #else /* !CONFIG_PROC_FS */
  #define snd_intel8x0m_proc_init(chip)
  #endif /* CONFIG_PROC_FS */
  
  
  static int snd_intel8x0m_dev_free(struct snd_device *device)
  {
  	struct intel8x0m *chip = device->device_data;
  	return snd_intel8x0m_free(chip);
  }
  
  struct ich_reg_info {
  	unsigned int int_sta_mask;
  	unsigned int offset;
  };
  
  static int snd_intel8x0m_create(struct snd_card *card,
  				struct pci_dev *pci,
  				unsigned long device_type,
  				struct intel8x0m **r_intel8x0m)
  {
  	struct intel8x0m *chip;
  	int err;
  	unsigned int i;
  	unsigned int int_sta_masks;
  	struct ichdev *ichdev;
  	static struct snd_device_ops ops = {
  		.dev_free =	snd_intel8x0m_dev_free,
  	};
  	static struct ich_reg_info intel_regs[2] = {
  		{ ICH_MIINT, 0 },
  		{ ICH_MOINT, 0x10 },
  	};
  	struct ich_reg_info *tbl;
  
  	*r_intel8x0m = NULL;
  
  	if ((err = pci_enable_device(pci)) < 0)
  		return err;
  
  	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
  	if (chip == NULL) {
  		pci_disable_device(pci);
  		return -ENOMEM;
  	}
  	spin_lock_init(&chip->reg_lock);
  	chip->device_type = device_type;
  	chip->card = card;
  	chip->pci = pci;
  	chip->irq = -1;
  
  	if ((err = pci_request_regions(pci, card->shortname)) < 0) {
  		kfree(chip);
  		pci_disable_device(pci);
  		return err;
  	}
  
  	if (device_type == DEVICE_ALI) {
  		/* ALI5455 has no ac97 region */
  		chip->bmaddr = pci_iomap(pci, 0, 0);
  		goto port_inited;
  	}
  
  	if (pci_resource_flags(pci, 2) & IORESOURCE_MEM) /* ICH4 and Nforce */
  		chip->addr = pci_iomap(pci, 2, 0);
  	else
  		chip->addr = pci_iomap(pci, 0, 0);
  	if (!chip->addr) {
  		snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
  		snd_intel8x0m_free(chip);
  		return -EIO;
  	}
  	if (pci_resource_flags(pci, 3) & IORESOURCE_MEM) /* ICH4 */
  		chip->bmaddr = pci_iomap(pci, 3, 0);
  	else
  		chip->bmaddr = pci_iomap(pci, 1, 0);
  	if (!chip->bmaddr) {
  		snd_printk(KERN_ERR "Controller space ioremap problem\n");
  		snd_intel8x0m_free(chip);
  		return -EIO;
  	}
  
   port_inited:
  	if (request_irq(pci->irq, snd_intel8x0m_interrupt, IRQF_SHARED,
  			KBUILD_MODNAME, chip)) {
  		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
  		snd_intel8x0m_free(chip);
  		return -EBUSY;
  	}
  	chip->irq = pci->irq;
  	pci_set_master(pci);
  	synchronize_irq(chip->irq);
  
  	/* initialize offsets */
  	chip->bdbars_count = 2;
  	tbl = intel_regs;
  
  	for (i = 0; i < chip->bdbars_count; i++) {
  		ichdev = &chip->ichd[i];
  		ichdev->ichd = i;
  		ichdev->reg_offset = tbl[i].offset;
  		ichdev->int_sta_mask = tbl[i].int_sta_mask;
  		if (device_type == DEVICE_SIS) {
  			/* SiS 7013 swaps the registers */
  			ichdev->roff_sr = ICH_REG_OFF_PICB;
  			ichdev->roff_picb = ICH_REG_OFF_SR;
  		} else {
  			ichdev->roff_sr = ICH_REG_OFF_SR;
  			ichdev->roff_picb = ICH_REG_OFF_PICB;
  		}
  		if (device_type == DEVICE_ALI)
  			ichdev->ali_slot = (ichdev->reg_offset - 0x40) / 0x10;
  	}
  	/* SIS7013 handles the pcm data in bytes, others are in words */
  	chip->pcm_pos_shift = (device_type == DEVICE_SIS) ? 0 : 1;
  
  	/* allocate buffer descriptor lists */
  	/* the start of each lists must be aligned to 8 bytes */
  	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
  				chip->bdbars_count * sizeof(u32) * ICH_MAX_FRAGS * 2,
  				&chip->bdbars) < 0) {
  		snd_intel8x0m_free(chip);
  		return -ENOMEM;
  	}
  	/* tables must be aligned to 8 bytes here, but the kernel pages
  	   are much bigger, so we don't care (on i386) */
  	int_sta_masks = 0;
  	for (i = 0; i < chip->bdbars_count; i++) {
  		ichdev = &chip->ichd[i];
  		ichdev->bdbar = ((u32 *)chip->bdbars.area) + (i * ICH_MAX_FRAGS * 2);
  		ichdev->bdbar_addr = chip->bdbars.addr + (i * sizeof(u32) * ICH_MAX_FRAGS * 2);
  		int_sta_masks |= ichdev->int_sta_mask;
  	}
  	chip->int_sta_reg = ICH_REG_GLOB_STA;
  	chip->int_sta_mask = int_sta_masks;
  
  	if ((err = snd_intel8x0m_chip_init(chip, 1)) < 0) {
  		snd_intel8x0m_free(chip);
  		return err;
  	}
  
  	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
  		snd_intel8x0m_free(chip);
  		return err;
  	}
  
  	snd_card_set_dev(card, &pci->dev);
  
  	*r_intel8x0m = chip;
  	return 0;
  }
  
  static struct shortname_table {
  	unsigned int id;
  	const char *s;
  } shortnames[] = {
  	{ PCI_DEVICE_ID_INTEL_82801AA_6, "Intel 82801AA-ICH" },
  	{ PCI_DEVICE_ID_INTEL_82801AB_6, "Intel 82901AB-ICH0" },
  	{ PCI_DEVICE_ID_INTEL_82801BA_6, "Intel 82801BA-ICH2" },
  	{ PCI_DEVICE_ID_INTEL_440MX_6, "Intel 440MX" },
  	{ PCI_DEVICE_ID_INTEL_82801CA_6, "Intel 82801CA-ICH3" },
  	{ PCI_DEVICE_ID_INTEL_82801DB_6, "Intel 82801DB-ICH4" },
  	{ PCI_DEVICE_ID_INTEL_82801EB_6, "Intel ICH5" },
  	{ PCI_DEVICE_ID_INTEL_ICH6_17, "Intel ICH6" },
  	{ PCI_DEVICE_ID_INTEL_ICH7_19, "Intel ICH7" },
  	{ 0x7446, "AMD AMD768" },
  	{ PCI_DEVICE_ID_SI_7013, "SiS SI7013" },
  	{ PCI_DEVICE_ID_NVIDIA_MCP1_MODEM, "NVidia nForce" },
  	{ PCI_DEVICE_ID_NVIDIA_MCP2_MODEM, "NVidia nForce2" },
  	{ PCI_DEVICE_ID_NVIDIA_MCP2S_MODEM, "NVidia nForce2s" },
  	{ PCI_DEVICE_ID_NVIDIA_MCP3_MODEM, "NVidia nForce3" },
  	{ 0x746e, "AMD AMD8111" },
  #if 0
  	{ 0x5455, "ALi M5455" },
  #endif
  	{ 0 },
  };
  
  static int snd_intel8x0m_probe(struct pci_dev *pci,
  			       const struct pci_device_id *pci_id)
  {
  	struct snd_card *card;
  	struct intel8x0m *chip;
  	int err;
  	struct shortname_table *name;
  
  	err = snd_card_create(index, id, THIS_MODULE, 0, &card);
  	if (err < 0)
  		return err;
  
  	strcpy(card->driver, "ICH-MODEM");
  	strcpy(card->shortname, "Intel ICH");
  	for (name = shortnames; name->id; name++) {
  		if (pci->device == name->id) {
  			strcpy(card->shortname, name->s);
  			break;
  		}
  	}
  	strcat(card->shortname," Modem");
  
  	if ((err = snd_intel8x0m_create(card, pci, pci_id->driver_data, &chip)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	card->private_data = chip;
  
  	if ((err = snd_intel8x0m_mixer(chip, ac97_clock)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	if ((err = snd_intel8x0m_pcm(chip)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	
  	snd_intel8x0m_proc_init(chip);
  
  	sprintf(card->longname, "%s at irq %i",
  		card->shortname, chip->irq);
  
  	if ((err = snd_card_register(card)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	pci_set_drvdata(pci, card);
  	return 0;
  }
  
  static void snd_intel8x0m_remove(struct pci_dev *pci)
  {
  	snd_card_free(pci_get_drvdata(pci));
  }
  
  static struct pci_driver intel8x0m_driver = {
  	.name = KBUILD_MODNAME,
  	.id_table = snd_intel8x0m_ids,
  	.probe = snd_intel8x0m_probe,
  	.remove = snd_intel8x0m_remove,
  	.driver = {
  		.pm = INTEL8X0M_PM_OPS,
  	},
  };
  
  module_pci_driver(intel8x0m_driver);
  