Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1344 insertions, 0 deletions

diff --git a/sound/pci/atiixp_modem.c b/sound/pci/atiixp_modem.c
new file mode 100644
index 000000000000..5d3e537339f9
--- /dev/null
+++ b/sound/pci/atiixp_modem.c
@@ -0,0 +1,1344 @@
+/*
+ *   ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
+ *
+ *	Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
+ *
+ *   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/io.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/info.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
+MODULE_DESCRIPTION("ATI IXP MC97 controller");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
+
+static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable audio part of ATI IXP controller.");
+module_param_array(ac97_clock, int, NULL, 0444);
+MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
+
+
+/*
+ */
+
+#define ATI_REG_ISR			0x00	/* interrupt source */
+#define  ATI_REG_ISR_MODEM_IN_XRUN	(1U<<0)
+#define  ATI_REG_ISR_MODEM_IN_STATUS	(1U<<1)
+#define  ATI_REG_ISR_MODEM_OUT1_XRUN	(1U<<2)
+#define  ATI_REG_ISR_MODEM_OUT1_STATUS	(1U<<3)
+#define  ATI_REG_ISR_MODEM_OUT2_XRUN	(1U<<4)
+#define  ATI_REG_ISR_MODEM_OUT2_STATUS	(1U<<5)
+#define  ATI_REG_ISR_MODEM_OUT3_XRUN	(1U<<6)
+#define  ATI_REG_ISR_MODEM_OUT3_STATUS	(1U<<7)
+#define  ATI_REG_ISR_PHYS_INTR		(1U<<8)
+#define  ATI_REG_ISR_PHYS_MISMATCH	(1U<<9)
+#define  ATI_REG_ISR_CODEC0_NOT_READY	(1U<<10)
+#define  ATI_REG_ISR_CODEC1_NOT_READY	(1U<<11)
+#define  ATI_REG_ISR_CODEC2_NOT_READY	(1U<<12)
+#define  ATI_REG_ISR_NEW_FRAME		(1U<<13)
+#define  ATI_REG_ISR_MODEM_GPIO_DATA	(1U<<14)
+
+#define ATI_REG_IER			0x04	/* interrupt enable */
+#define  ATI_REG_IER_MODEM_IN_XRUN_EN	(1U<<0)
+#define  ATI_REG_IER_MODEM_STATUS_EN	(1U<<1)
+#define  ATI_REG_IER_MODEM_OUT1_XRUN_EN	(1U<<2)
+#define  ATI_REG_IER_MODEM_OUT2_XRUN_EN	(1U<<4)
+#define  ATI_REG_IER_MODEM_OUT3_XRUN_EN	(1U<<6)
+#define  ATI_REG_IER_PHYS_INTR_EN	(1U<<8)
+#define  ATI_REG_IER_PHYS_MISMATCH_EN	(1U<<9)
+#define  ATI_REG_IER_CODEC0_INTR_EN	(1U<<10)
+#define  ATI_REG_IER_CODEC1_INTR_EN	(1U<<11)
+#define  ATI_REG_IER_CODEC2_INTR_EN	(1U<<12)
+#define  ATI_REG_IER_NEW_FRAME_EN	(1U<<13)	/* (RO */
+#define  ATI_REG_IER_MODEM_GPIO_DATA_EN	(1U<<14)	/* (WO) modem is running */
+#define  ATI_REG_IER_MODEM_SET_BUS_BUSY	(1U<<15)
+
+#define ATI_REG_CMD			0x08	/* command */
+#define  ATI_REG_CMD_POWERDOWN	(1U<<0)
+#define  ATI_REG_CMD_MODEM_RECEIVE_EN	(1U<<1)	/* modem only */
+#define  ATI_REG_CMD_MODEM_SEND1_EN	(1U<<2)	/* modem only */
+#define  ATI_REG_CMD_MODEM_SEND2_EN	(1U<<3)	/* modem only */
+#define  ATI_REG_CMD_MODEM_SEND3_EN	(1U<<4)	/* modem only */
+#define  ATI_REG_CMD_MODEM_STATUS_MEM	(1U<<5)	/* modem only */
+#define  ATI_REG_CMD_MODEM_IN_DMA_EN	(1U<<8)	/* modem only */
+#define  ATI_REG_CMD_MODEM_OUT_DMA1_EN	(1U<<9)	/* modem only */
+#define  ATI_REG_CMD_MODEM_OUT_DMA2_EN	(1U<<10)	/* modem only */
+#define  ATI_REG_CMD_MODEM_OUT_DMA3_EN	(1U<<11)	/* modem only */
+#define  ATI_REG_CMD_AUDIO_PRESENT	(1U<<20)
+#define  ATI_REG_CMD_MODEM_GPIO_THRU_DMA	(1U<<22)	/* modem only */
+#define  ATI_REG_CMD_LOOPBACK_EN	(1U<<23)
+#define  ATI_REG_CMD_PACKED_DIS		(1U<<24)
+#define  ATI_REG_CMD_BURST_EN		(1U<<25)
+#define  ATI_REG_CMD_PANIC_EN		(1U<<26)
+#define  ATI_REG_CMD_MODEM_PRESENT	(1U<<27)
+#define  ATI_REG_CMD_ACLINK_ACTIVE	(1U<<28)
+#define  ATI_REG_CMD_AC_SOFT_RESET	(1U<<29)
+#define  ATI_REG_CMD_AC_SYNC		(1U<<30)
+#define  ATI_REG_CMD_AC_RESET		(1U<<31)
+
+#define ATI_REG_PHYS_OUT_ADDR		0x0c
+#define  ATI_REG_PHYS_OUT_CODEC_MASK	(3U<<0)
+#define  ATI_REG_PHYS_OUT_RW		(1U<<2)
+#define  ATI_REG_PHYS_OUT_ADDR_EN	(1U<<8)
+#define  ATI_REG_PHYS_OUT_ADDR_SHIFT	9
+#define  ATI_REG_PHYS_OUT_DATA_SHIFT	16
+
+#define ATI_REG_PHYS_IN_ADDR		0x10
+#define  ATI_REG_PHYS_IN_READ_FLAG	(1U<<8)
+#define  ATI_REG_PHYS_IN_ADDR_SHIFT	9
+#define  ATI_REG_PHYS_IN_DATA_SHIFT	16
+
+#define ATI_REG_SLOTREQ			0x14
+
+#define ATI_REG_COUNTER			0x18
+#define  ATI_REG_COUNTER_SLOT		(3U<<0)	/* slot # */
+#define  ATI_REG_COUNTER_BITCLOCK	(31U<<8)
+
+#define ATI_REG_IN_FIFO_THRESHOLD	0x1c
+
+#define ATI_REG_MODEM_IN_DMA_LINKPTR	0x20
+#define ATI_REG_MODEM_IN_DMA_DT_START	0x24	/* RO */
+#define ATI_REG_MODEM_IN_DMA_DT_NEXT	0x28	/* RO */
+#define ATI_REG_MODEM_IN_DMA_DT_CUR	0x2c	/* RO */
+#define ATI_REG_MODEM_IN_DMA_DT_SIZE	0x30
+#define ATI_REG_MODEM_OUT_FIFO		0x34	/* output threshold */
+#define  ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK	(0xf<<16)
+#define  ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT	16
+#define ATI_REG_MODEM_OUT_DMA1_LINKPTR	0x38
+#define ATI_REG_MODEM_OUT_DMA2_LINKPTR	0x3c
+#define ATI_REG_MODEM_OUT_DMA3_LINKPTR	0x40
+#define ATI_REG_MODEM_OUT_DMA1_DT_START	0x44
+#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT	0x48
+#define ATI_REG_MODEM_OUT_DMA1_DT_CUR	0x4c
+#define ATI_REG_MODEM_OUT_DMA2_DT_START	0x50
+#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT	0x54
+#define ATI_REG_MODEM_OUT_DMA2_DT_CUR	0x58
+#define ATI_REG_MODEM_OUT_DMA3_DT_START	0x5c
+#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT	0x60
+#define ATI_REG_MODEM_OUT_DMA3_DT_CUR	0x64
+#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE	0x68
+#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE	0x6c
+#define ATI_REG_MODEM_OUT_FIFO_USED     0x70
+#define ATI_REG_MODEM_OUT_GPIO		0x74
+#define  ATI_REG_MODEM_OUT_GPIO_EN	   1
+#define  ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
+#define ATI_REG_MODEM_IN_GPIO		0x78
+
+#define ATI_REG_MODEM_MIRROR		0x7c
+#define ATI_REG_AUDIO_MIRROR		0x80
+
+#define ATI_REG_MODEM_FIFO_FLUSH	0x88
+#define  ATI_REG_MODEM_FIFO_OUT1_FLUSH	(1U<<0)
+#define  ATI_REG_MODEM_FIFO_OUT2_FLUSH	(1U<<1)
+#define  ATI_REG_MODEM_FIFO_OUT3_FLUSH	(1U<<2)
+#define  ATI_REG_MODEM_FIFO_IN_FLUSH	(1U<<3)
+
+/* LINKPTR */
+#define  ATI_REG_LINKPTR_EN		(1U<<0)
+
+#define ATI_MAX_DESCRIPTORS	256	/* max number of descriptor packets */
+
+
+/*
+ */
+
+typedef struct snd_atiixp atiixp_t;
+typedef struct snd_atiixp_dma atiixp_dma_t;
+typedef struct snd_atiixp_dma_ops atiixp_dma_ops_t;
+
+
+/*
+ * DMA packate descriptor
+ */
+
+typedef struct atiixp_dma_desc {
+	u32 addr;	/* DMA buffer address */
+	u16 status;	/* status bits */
+	u16 size;	/* size of the packet in dwords */
+	u32 next;	/* address of the next packet descriptor */
+} atiixp_dma_desc_t;
+
+/*
+ * stream enum
+ */
+enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
+enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
+enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
+
+#define NUM_ATI_CODECS	3
+
+
+/*
+ * constants and callbacks for each DMA type
+ */
+struct snd_atiixp_dma_ops {
+	int type;			/* ATI_DMA_XXX */
+	unsigned int llp_offset;	/* LINKPTR offset */
+	unsigned int dt_cur;		/* DT_CUR offset */
+	void (*enable_dma)(atiixp_t *chip, int on);	/* called from open callback */
+	void (*enable_transfer)(atiixp_t *chip, int on); /* called from trigger (START/STOP) */
+	void (*flush_dma)(atiixp_t *chip);		/* called from trigger (STOP only) */
+};
+
+/*
+ * DMA stream
+ */
+struct snd_atiixp_dma {
+	const atiixp_dma_ops_t *ops;
+	struct snd_dma_buffer desc_buf;
+	snd_pcm_substream_t *substream;	/* assigned PCM substream */
+	unsigned int buf_addr, buf_bytes;	/* DMA buffer address, bytes */
+	unsigned int period_bytes, periods;
+	int opened;
+	int running;
+	int pcm_open_flag;
+	int ac97_pcm_type;	/* index # of ac97_pcm to access, -1 = not used */
+};
+
+/*
+ * ATI IXP chip
+ */
+struct snd_atiixp {
+	snd_card_t *card;
+	struct pci_dev *pci;
+
+	struct resource *res;		/* memory i/o */
+	unsigned long addr;
+	void __iomem *remap_addr;
+	int irq;
+	
+	ac97_bus_t *ac97_bus;
+	ac97_t *ac97[NUM_ATI_CODECS];
+
+	spinlock_t reg_lock;
+
+	atiixp_dma_t dmas[NUM_ATI_DMAS];
+	struct ac97_pcm *pcms[NUM_ATI_PCMS];
+	snd_pcm_t *pcmdevs[NUM_ATI_PCMDEVS];
+
+	int max_channels;		/* max. channels for PCM out */
+
+	unsigned int codec_not_ready_bits;	/* for codec detection */
+
+	int spdif_over_aclink;		/* passed from the module option */
+	struct semaphore open_mutex;	/* playback open mutex */
+};
+
+
+/*
+ */
+static struct pci_device_id snd_atiixp_ids[] = {
+	{ 0x1002, 0x434d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB200 */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
+
+
+/*
+ * lowlevel functions
+ */
+
+/*
+ * update the bits of the given register.
+ * return 1 if the bits changed.
+ */
+static int snd_atiixp_update_bits(atiixp_t *chip, unsigned int reg,
+				 unsigned int mask, unsigned int value)
+{
+	void __iomem *addr = chip->remap_addr + reg;
+	unsigned int data, old_data;
+	old_data = data = readl(addr);
+	data &= ~mask;
+	data |= value;
+	if (old_data == data)
+		return 0;
+	writel(data, addr);
+	return 1;
+}
+
+/*
+ * macros for easy use
+ */
+#define atiixp_write(chip,reg,value) \
+	writel(value, chip->remap_addr + ATI_REG_##reg)
+#define atiixp_read(chip,reg) \
+	readl(chip->remap_addr + ATI_REG_##reg)
+#define atiixp_update(chip,reg,mask,val) \
+	snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
+
+/* delay for one tick */
+#define do_delay() do { \
+	set_current_state(TASK_UNINTERRUPTIBLE); \
+	schedule_timeout(1); \
+} while (0)
+
+
+/*
+ * handling DMA packets
+ *
+ * we allocate a linear buffer for the DMA, and split it to  each packet.
+ * in a future version, a scatter-gather buffer should be implemented.
+ */
+
+#define ATI_DESC_LIST_SIZE \
+	PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(atiixp_dma_desc_t))
+
+/*
+ * build packets ring for the given buffer size.
+ *
+ * IXP handles the buffer descriptors, which are connected as a linked
+ * list.  although we can change the list dynamically, in this version,
+ * a static RING of buffer descriptors is used.
+ *
+ * the ring is built in this function, and is set up to the hardware. 
+ */
+static int atiixp_build_dma_packets(atiixp_t *chip, atiixp_dma_t *dma,
+				   snd_pcm_substream_t *substream,
+				   unsigned int periods,
+				   unsigned int period_bytes)
+{
+	unsigned int i;
+	u32 addr, desc_addr;
+	unsigned long flags;
+
+	if (periods > ATI_MAX_DESCRIPTORS)
+		return -ENOMEM;
+
+	if (dma->desc_buf.area == NULL) {
+		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
+					ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
+			return -ENOMEM;
+		dma->period_bytes = dma->periods = 0; /* clear */
+	}
+
+	if (dma->periods == periods && dma->period_bytes == period_bytes)
+		return 0;
+
+	/* reset DMA before changing the descriptor table */
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	writel(0, chip->remap_addr + dma->ops->llp_offset);
+	dma->ops->enable_dma(chip, 0);
+	dma->ops->enable_dma(chip, 1);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+
+	/* fill the entries */
+	addr = (u32)substream->runtime->dma_addr;
+	desc_addr = (u32)dma->desc_buf.addr;
+	for (i = 0; i < periods; i++) {
+		atiixp_dma_desc_t *desc = &((atiixp_dma_desc_t *)dma->desc_buf.area)[i];
+		desc->addr = cpu_to_le32(addr);
+		desc->status = 0;
+		desc->size = period_bytes >> 2; /* in dwords */
+		desc_addr += sizeof(atiixp_dma_desc_t);
+		if (i == periods - 1)
+			desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
+		else
+			desc->next = cpu_to_le32(desc_addr);
+		addr += period_bytes;
+	}
+
+	writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
+	       chip->remap_addr + dma->ops->llp_offset);
+
+	dma->period_bytes = period_bytes;
+	dma->periods = periods;
+
+	return 0;
+}
+
+/*
+ * remove the ring buffer and release it if assigned
+ */
+static void atiixp_clear_dma_packets(atiixp_t *chip, atiixp_dma_t *dma, snd_pcm_substream_t *substream)
+{
+	if (dma->desc_buf.area) {
+		writel(0, chip->remap_addr + dma->ops->llp_offset);
+		snd_dma_free_pages(&dma->desc_buf);
+		dma->desc_buf.area = NULL;
+	}
+}
+
+/*
+ * AC97 interface
+ */
+static int snd_atiixp_acquire_codec(atiixp_t *chip)
+{
+	int timeout = 1000;
+
+	while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
+		if (! timeout--) {
+			snd_printk(KERN_WARNING "atiixp: codec acquire timeout\n");
+			return -EBUSY;
+		}
+		udelay(1);
+	}
+	return 0;
+}
+
+static unsigned short snd_atiixp_codec_read(atiixp_t *chip, unsigned short codec, unsigned short reg)
+{
+	unsigned int data;
+	int timeout;
+
+	if (snd_atiixp_acquire_codec(chip) < 0)
+		return 0xffff;
+	data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
+		ATI_REG_PHYS_OUT_ADDR_EN |
+		ATI_REG_PHYS_OUT_RW |
+		codec;
+	atiixp_write(chip, PHYS_OUT_ADDR, data);
+	if (snd_atiixp_acquire_codec(chip) < 0)
+		return 0xffff;
+	timeout = 1000;
+	do {
+		data = atiixp_read(chip, PHYS_IN_ADDR);
+		if (data & ATI_REG_PHYS_IN_READ_FLAG)
+			return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
+		udelay(1);
+	} while (--timeout);
+	/* time out may happen during reset */
+	if (reg < 0x7c)
+		snd_printk(KERN_WARNING "atiixp: codec read timeout (reg %x)\n", reg);
+	return 0xffff;
+}
+
+
+static void snd_atiixp_codec_write(atiixp_t *chip, unsigned short codec, unsigned short reg, unsigned short val)
+{
+	unsigned int data;
+    
+	if (snd_atiixp_acquire_codec(chip) < 0)
+		return;
+	data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
+		((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
+		ATI_REG_PHYS_OUT_ADDR_EN | codec;
+	atiixp_write(chip, PHYS_OUT_ADDR, data);
+}
+
+
+static unsigned short snd_atiixp_ac97_read(ac97_t *ac97, unsigned short reg)
+{
+	atiixp_t *chip = ac97->private_data;
+	return snd_atiixp_codec_read(chip, ac97->num, reg);
+    
+}
+
+static void snd_atiixp_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
+{
+	atiixp_t *chip = ac97->private_data;
+	snd_atiixp_codec_write(chip, ac97->num, reg, val);
+}
+
+/*
+ * reset AC link
+ */
+static int snd_atiixp_aclink_reset(atiixp_t *chip)
+{
+	int timeout;
+
+	/* reset powerdoewn */
+	if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
+		udelay(10);
+
+	/* perform a software reset */
+	atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
+	atiixp_read(chip, CMD);
+	udelay(10);
+	atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
+    
+	timeout = 10;
+	while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
+		/* do a hard reset */
+		atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
+			      ATI_REG_CMD_AC_SYNC);
+		atiixp_read(chip, CMD);
+		do_delay();
+		atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
+		if (--timeout) {
+			snd_printk(KERN_ERR "atiixp: codec reset timeout\n");
+			break;
+		}
+	}
+
+	/* deassert RESET and assert SYNC to make sure */
+	atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
+		      ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int snd_atiixp_aclink_down(atiixp_t *chip)
+{
+	// if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
+	//	return -EBUSY;
+	atiixp_update(chip, CMD,
+		     ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
+		     ATI_REG_CMD_POWERDOWN);
+	return 0;
+}
+#endif
+
+/*
+ * auto-detection of codecs
+ *
+ * the IXP chip can generate interrupts for the non-existing codecs.
+ * NEW_FRAME interrupt is used to make sure that the interrupt is generated
+ * even if all three codecs are connected.
+ */
+
+#define ALL_CODEC_NOT_READY \
+	    (ATI_REG_ISR_CODEC0_NOT_READY |\
+	     ATI_REG_ISR_CODEC1_NOT_READY |\
+	     ATI_REG_ISR_CODEC2_NOT_READY)
+#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
+
+static int snd_atiixp_codec_detect(atiixp_t *chip)
+{
+	int timeout;
+
+	chip->codec_not_ready_bits = 0;
+	atiixp_write(chip, IER, CODEC_CHECK_BITS);
+	/* wait for the interrupts */
+	timeout = HZ / 10;
+	while (timeout-- > 0) {
+		do_delay();
+		if (chip->codec_not_ready_bits)
+			break;
+	}
+	atiixp_write(chip, IER, 0); /* disable irqs */
+
+	if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
+		snd_printk(KERN_ERR "atiixp: no codec detected!\n");
+		return -ENXIO;
+	}
+	return 0;
+}
+
+
+/*
+ * enable DMA and irqs
+ */
+static int snd_atiixp_chip_start(atiixp_t *chip)
+{
+	unsigned int reg;
+
+	/* set up spdif, enable burst mode */
+	reg = atiixp_read(chip, CMD);
+	reg |= ATI_REG_CMD_BURST_EN;
+	if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
+		reg |= ATI_REG_CMD_MODEM_PRESENT;
+	atiixp_write(chip, CMD, reg);
+
+	/* clear all interrupt source */
+	atiixp_write(chip, ISR, 0xffffffff);
+	/* enable irqs */
+	atiixp_write(chip, IER,
+		     ATI_REG_IER_MODEM_STATUS_EN |
+		     ATI_REG_IER_MODEM_IN_XRUN_EN |
+		     ATI_REG_IER_MODEM_OUT1_XRUN_EN);
+	return 0;
+}
+
+
+/*
+ * disable DMA and IRQs
+ */
+static int snd_atiixp_chip_stop(atiixp_t *chip)
+{
+	/* clear interrupt source */
+	atiixp_write(chip, ISR, atiixp_read(chip, ISR));
+	/* disable irqs */
+	atiixp_write(chip, IER, 0);
+	return 0;
+}
+
+
+/*
+ * PCM section
+ */
+
+/*
+ * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
+ * position.  when SG-buffer is implemented, the offset must be calculated
+ * correctly...
+ */
+static snd_pcm_uframes_t snd_atiixp_pcm_pointer(snd_pcm_substream_t *substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	atiixp_dma_t *dma = (atiixp_dma_t *)runtime->private_data;
+	unsigned int curptr;
+	int timeout = 1000;
+
+	while (timeout--) {
+		curptr = readl(chip->remap_addr + dma->ops->dt_cur);
+		if (curptr < dma->buf_addr)
+			continue;
+		curptr -= dma->buf_addr;
+		if (curptr >= dma->buf_bytes)
+			continue;
+		return bytes_to_frames(runtime, curptr);
+	}
+	snd_printd("atiixp-modem: invalid DMA pointer read 0x%x (buf=%x)\n",
+		   readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
+	return 0;
+}
+
+/*
+ * XRUN detected, and stop the PCM substream
+ */
+static void snd_atiixp_xrun_dma(atiixp_t *chip, atiixp_dma_t *dma)
+{
+	if (! dma->substream || ! dma->running)
+		return;
+	snd_printdd("atiixp: XRUN detected (DMA %d)\n", dma->ops->type);
+	snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
+}
+
+/*
+ * the period ack.  update the substream.
+ */
+static void snd_atiixp_update_dma(atiixp_t *chip, atiixp_dma_t *dma)
+{
+	if (! dma->substream || ! dma->running)
+		return;
+	snd_pcm_period_elapsed(dma->substream);
+}
+
+/* set BUS_BUSY interrupt bit if any DMA is running */
+/* call with spinlock held */
+static void snd_atiixp_check_bus_busy(atiixp_t *chip)
+{
+	unsigned int bus_busy;
+	if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
+				      ATI_REG_CMD_MODEM_RECEIVE_EN))
+		bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
+	else
+		bus_busy = 0;
+	atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
+}
+
+/* common trigger callback
+ * calling the lowlevel callbacks in it
+ */
+static int snd_atiixp_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	atiixp_dma_t *dma = (atiixp_dma_t *)substream->runtime->private_data;
+	unsigned int reg = 0;
+	int i;
+
+	snd_assert(dma->ops->enable_transfer && dma->ops->flush_dma, return -EINVAL);
+
+	if (cmd != SNDRV_PCM_TRIGGER_START && cmd != SNDRV_PCM_TRIGGER_STOP)
+		return -EINVAL;
+
+	spin_lock(&chip->reg_lock);
+
+	/* hook off/on: via GPIO_OUT */
+	for (i = 0; i < NUM_ATI_CODECS; i++) {
+		if (chip->ac97[i]) {
+			reg = snd_ac97_read(chip->ac97[i], AC97_GPIO_STATUS);
+			break;
+	}
+	}
+	if(cmd == SNDRV_PCM_TRIGGER_START)
+		reg |= AC97_GPIO_LINE1_OH;
+	else
+		reg &= ~AC97_GPIO_LINE1_OH;
+	reg = (reg << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN ;
+	atiixp_write(chip, MODEM_OUT_GPIO, reg);
+
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		dma->ops->enable_transfer(chip, 1);
+		dma->running = 1;
+	} else {
+		dma->ops->enable_transfer(chip, 0);
+		dma->running = 0;
+	}
+	snd_atiixp_check_bus_busy(chip);
+	if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		dma->ops->flush_dma(chip);
+		snd_atiixp_check_bus_busy(chip);
+	}
+	spin_unlock(&chip->reg_lock);
+	return 0;
+}
+
+
+/*
+ * lowlevel callbacks for each DMA type
+ *
+ * every callback is supposed to be called in chip->reg_lock spinlock
+ */
+
+/* flush FIFO of analog OUT DMA */
+static void atiixp_out_flush_dma(atiixp_t *chip)
+{
+	atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
+}
+
+/* enable/disable analog OUT DMA */
+static void atiixp_out_enable_dma(atiixp_t *chip, int on)
+{
+	unsigned int data;
+	data = atiixp_read(chip, CMD);
+	if (on) {
+		if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
+			return;
+		atiixp_out_flush_dma(chip);
+		data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
+	} else
+		data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
+	atiixp_write(chip, CMD, data);
+}
+
+/* start/stop transfer over OUT DMA */
+static void atiixp_out_enable_transfer(atiixp_t *chip, int on)
+{
+	atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
+		      on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
+}
+
+/* enable/disable analog IN DMA */
+static void atiixp_in_enable_dma(atiixp_t *chip, int on)
+{
+	atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
+		      on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
+}
+
+/* start/stop analog IN DMA */
+static void atiixp_in_enable_transfer(atiixp_t *chip, int on)
+{
+	if (on) {
+		unsigned int data = atiixp_read(chip, CMD);
+		if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
+			data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
+			atiixp_write(chip, CMD, data);
+		}
+	} else
+		atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
+}
+
+/* flush FIFO of analog IN DMA */
+static void atiixp_in_flush_dma(atiixp_t *chip)
+{
+	atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
+}
+
+/* set up slots and formats for analog OUT */
+static int snd_atiixp_playback_prepare(snd_pcm_substream_t *substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	unsigned int data;
+
+	spin_lock_irq(&chip->reg_lock);
+	/* set output threshold */
+	data = atiixp_read(chip, MODEM_OUT_FIFO);
+	data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
+	data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
+	atiixp_write(chip, MODEM_OUT_FIFO, data);
+	spin_unlock_irq(&chip->reg_lock);
+	return 0;
+}
+
+/* set up slots and formats for analog IN */
+static int snd_atiixp_capture_prepare(snd_pcm_substream_t *substream)
+{
+	return 0;
+}
+
+/*
+ * hw_params - allocate the buffer and set up buffer descriptors
+ */
+static int snd_atiixp_pcm_hw_params(snd_pcm_substream_t *substream,
+				   snd_pcm_hw_params_t *hw_params)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	atiixp_dma_t *dma = (atiixp_dma_t *)substream->runtime->private_data;
+	int err;
+	int i;
+
+	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+	if (err < 0)
+		return err;
+	dma->buf_addr = substream->runtime->dma_addr;
+	dma->buf_bytes = params_buffer_bytes(hw_params);
+
+	err = atiixp_build_dma_packets(chip, dma, substream,
+				       params_periods(hw_params),
+				       params_period_bytes(hw_params));
+	if (err < 0)
+		return err;
+
+	/* set up modem rate */
+	for (i = 0; i < NUM_ATI_CODECS; i++) {
+		if (! chip->ac97[i])
+			continue;
+		snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
+		snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
+	}
+
+	return err;
+}
+
+static int snd_atiixp_pcm_hw_free(snd_pcm_substream_t * substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	atiixp_dma_t *dma = (atiixp_dma_t *)substream->runtime->private_data;
+
+	atiixp_clear_dma_packets(chip, dma, substream);
+	snd_pcm_lib_free_pages(substream);
+	return 0;
+}
+
+
+/*
+ * pcm hardware definition, identical for all DMA types
+ */
+static snd_pcm_hardware_t snd_atiixp_pcm_hw =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.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 =		2,
+	.channels_max =		2,
+	.buffer_bytes_max =	256 * 1024,
+	.period_bytes_min =	32,
+	.period_bytes_max =	128 * 1024,
+	.periods_min =		2,
+	.periods_max =		ATI_MAX_DESCRIPTORS,
+};
+
+static int snd_atiixp_pcm_open(snd_pcm_substream_t *substream, atiixp_dma_t *dma, int pcm_type)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int err;
+	static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
+	static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
+		.count = ARRAY_SIZE(rates),
+		.list = rates,
+		.mask = 0,
+	};
+
+	snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
+
+	if (dma->opened)
+		return -EBUSY;
+	dma->substream = substream;
+	runtime->hw = snd_atiixp_pcm_hw;
+	dma->ac97_pcm_type = pcm_type;
+	if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
+		return err;
+	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+		return err;
+	runtime->private_data = dma;
+
+	/* enable DMA bits */
+	spin_lock_irq(&chip->reg_lock);
+	dma->ops->enable_dma(chip, 1);
+	spin_unlock_irq(&chip->reg_lock);
+	dma->opened = 1;
+
+	return 0;
+}
+
+static int snd_atiixp_pcm_close(snd_pcm_substream_t *substream, atiixp_dma_t *dma)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	/* disable DMA bits */
+	snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
+	spin_lock_irq(&chip->reg_lock);
+	dma->ops->enable_dma(chip, 0);
+	spin_unlock_irq(&chip->reg_lock);
+	dma->substream = NULL;
+	dma->opened = 0;
+	return 0;
+}
+
+/*
+ */
+static int snd_atiixp_playback_open(snd_pcm_substream_t *substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	int err;
+
+	down(&chip->open_mutex);
+	err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
+	up(&chip->open_mutex);
+	if (err < 0)
+		return err;
+	return 0;
+}
+
+static int snd_atiixp_playback_close(snd_pcm_substream_t *substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	int err;
+	down(&chip->open_mutex);
+	err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
+	up(&chip->open_mutex);
+	return err;
+}
+
+static int snd_atiixp_capture_open(snd_pcm_substream_t *substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
+}
+
+static int snd_atiixp_capture_close(snd_pcm_substream_t *substream)
+{
+	atiixp_t *chip = snd_pcm_substream_chip(substream);
+	return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
+}
+
+
+/* AC97 playback */
+static snd_pcm_ops_t snd_atiixp_playback_ops = {
+	.open =		snd_atiixp_playback_open,
+	.close =	snd_atiixp_playback_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_atiixp_pcm_hw_params,
+	.hw_free =	snd_atiixp_pcm_hw_free,
+	.prepare =	snd_atiixp_playback_prepare,
+	.trigger =	snd_atiixp_pcm_trigger,
+	.pointer =	snd_atiixp_pcm_pointer,
+};
+
+/* AC97 capture */
+static snd_pcm_ops_t snd_atiixp_capture_ops = {
+	.open =		snd_atiixp_capture_open,
+	.close =	snd_atiixp_capture_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_atiixp_pcm_hw_params,
+	.hw_free =	snd_atiixp_pcm_hw_free,
+	.prepare =	snd_atiixp_capture_prepare,
+	.trigger =	snd_atiixp_pcm_trigger,
+	.pointer =	snd_atiixp_pcm_pointer,
+};
+
+static atiixp_dma_ops_t snd_atiixp_playback_dma_ops = {
+	.type = ATI_DMA_PLAYBACK,
+	.llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
+	.dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
+	.enable_dma = atiixp_out_enable_dma,
+	.enable_transfer = atiixp_out_enable_transfer,
+	.flush_dma = atiixp_out_flush_dma,
+};
+	
+static atiixp_dma_ops_t snd_atiixp_capture_dma_ops = {
+	.type = ATI_DMA_CAPTURE,
+	.llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
+	.dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
+	.enable_dma = atiixp_in_enable_dma,
+	.enable_transfer = atiixp_in_enable_transfer,
+	.flush_dma = atiixp_in_flush_dma,
+};
+
+static int __devinit snd_atiixp_pcm_new(atiixp_t *chip)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	/* initialize constants */
+	chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
+	chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
+
+	/* PCM #0: analog I/O */
+	err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
+	pcm->private_data = chip;
+	strcpy(pcm->name, "ATI IXP MC97");
+	chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
+
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+					      snd_dma_pci_data(chip->pci), 64*1024, 128*1024);
+
+	return 0;
+}
+
+
+
+/*
+ * interrupt handler
+ */
+static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	atiixp_t *chip = dev_id;
+	unsigned int status;
+
+	status = atiixp_read(chip, ISR);
+
+	if (! status)
+		return IRQ_NONE;
+
+	/* process audio DMA */
+	if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
+		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);
+	else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
+		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
+	if (status & ATI_REG_ISR_MODEM_IN_XRUN)
+		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);
+	else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
+		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
+
+	/* for codec detection */
+	if (status & CODEC_CHECK_BITS) {
+		unsigned int detected;
+		detected = status & CODEC_CHECK_BITS;
+		spin_lock(&chip->reg_lock);
+		chip->codec_not_ready_bits |= detected;
+		atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
+		spin_unlock(&chip->reg_lock);
+	}
+
+	/* ack */
+	atiixp_write(chip, ISR, status);
+
+	return IRQ_HANDLED;
+}
+
+
+/*
+ * ac97 mixer section
+ */
+
+static int __devinit snd_atiixp_mixer_new(atiixp_t *chip, int clock)
+{
+	ac97_bus_t *pbus;
+	ac97_template_t ac97;
+	int i, err;
+	int codec_count;
+	static ac97_bus_ops_t ops = {
+		.write = snd_atiixp_ac97_write,
+		.read = snd_atiixp_ac97_read,
+	};
+	static unsigned int codec_skip[NUM_ATI_CODECS] = {
+		ATI_REG_ISR_CODEC0_NOT_READY,
+		ATI_REG_ISR_CODEC1_NOT_READY,
+		ATI_REG_ISR_CODEC2_NOT_READY,
+	};
+
+	if (snd_atiixp_codec_detect(chip) < 0)
+		return -ENXIO;
+
+	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
+		return err;
+	pbus->clock = clock;
+	pbus->shared_type = AC97_SHARED_TYPE_ATIIXP;	/* shared with audio driver */
+	chip->ac97_bus = pbus;
+
+	codec_count = 0;
+	for (i = 0; i < NUM_ATI_CODECS; i++) {
+		if (chip->codec_not_ready_bits & codec_skip[i])
+			continue;
+		memset(&ac97, 0, sizeof(ac97));
+		ac97.private_data = chip;
+		ac97.pci = chip->pci;
+		ac97.num = i;
+		ac97.scaps = AC97_SCAP_SKIP_AUDIO;
+		if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
+			chip->ac97[i] = NULL; /* to be sure */
+			snd_printdd("atiixp: codec %d not available for modem\n", i);
+			continue;
+		}
+		codec_count++;
+	}
+
+	if (! codec_count) {
+		snd_printk(KERN_ERR "atiixp: no codec available\n");
+		return -ENODEV;
+	}
+
+	/* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
+
+	return 0;
+}
+
+
+#ifdef CONFIG_PM
+/*
+ * power management
+ */
+static int snd_atiixp_suspend(snd_card_t *card, pm_message_t state)
+{
+	atiixp_t *chip = card->pm_private_data;
+	int i;
+
+	for (i = 0; i < NUM_ATI_PCMDEVS; i++)
+		if (chip->pcmdevs[i])
+			snd_pcm_suspend_all(chip->pcmdevs[i]);
+	for (i = 0; i < NUM_ATI_CODECS; i++)
+		if (chip->ac97[i])
+			snd_ac97_suspend(chip->ac97[i]);
+	snd_atiixp_aclink_down(chip);
+	snd_atiixp_chip_stop(chip);
+
+	pci_set_power_state(chip->pci, 3);
+	pci_disable_device(chip->pci);
+	return 0;
+}
+
+static int snd_atiixp_resume(snd_card_t *card)
+{
+	atiixp_t *chip = card->pm_private_data;
+	int i;
+
+	pci_enable_device(chip->pci);
+	pci_set_power_state(chip->pci, 0);
+	pci_set_master(chip->pci);
+
+	snd_atiixp_aclink_reset(chip);
+	snd_atiixp_chip_start(chip);
+
+	for (i = 0; i < NUM_ATI_CODECS; i++)
+		if (chip->ac97[i])
+			snd_ac97_resume(chip->ac97[i]);
+
+	return 0;
+}
+#endif /* CONFIG_PM */
+
+
+/*
+ * proc interface for register dump
+ */
+
+static void snd_atiixp_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+{
+	atiixp_t *chip = entry->private_data;
+	int i;
+
+	for (i = 0; i < 256; i += 4)
+		snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
+}
+
+static void __devinit snd_atiixp_proc_init(atiixp_t *chip)
+{
+	snd_info_entry_t *entry;
+
+	if (! snd_card_proc_new(chip->card, "atiixp", &entry))
+		snd_info_set_text_ops(entry, chip, 1024, snd_atiixp_proc_read);
+}
+
+
+
+/*
+ * destructor
+ */
+
+static int snd_atiixp_free(atiixp_t *chip)
+{
+	if (chip->irq < 0)
+		goto __hw_end;
+	snd_atiixp_chip_stop(chip);
+	synchronize_irq(chip->irq);
+      __hw_end:
+	if (chip->irq >= 0)
+		free_irq(chip->irq, (void *)chip);
+	if (chip->remap_addr)
+		iounmap(chip->remap_addr);
+	pci_release_regions(chip->pci);
+	pci_disable_device(chip->pci);
+	kfree(chip);
+	return 0;
+}
+
+static int snd_atiixp_dev_free(snd_device_t *device)
+{
+	atiixp_t *chip = device->device_data;
+	return snd_atiixp_free(chip);
+}
+
+/*
+ * constructor for chip instance
+ */
+static int __devinit snd_atiixp_create(snd_card_t *card,
+				      struct pci_dev *pci,
+				      atiixp_t **r_chip)
+{
+	static snd_device_ops_t ops = {
+		.dev_free =	snd_atiixp_dev_free,
+	};
+	atiixp_t *chip;
+	int err;
+
+	if ((err = pci_enable_device(pci)) < 0)
+		return err;
+
+	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+	if (chip == NULL) {
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+
+	spin_lock_init(&chip->reg_lock);
+	init_MUTEX(&chip->open_mutex);
+	chip->card = card;
+	chip->pci = pci;
+	chip->irq = -1;
+	if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
+		kfree(chip);
+		pci_disable_device(pci);
+		return err;
+	}
+	chip->addr = pci_resource_start(pci, 0);
+	chip->remap_addr = ioremap_nocache(chip->addr, pci_resource_len(pci, 0));
+	if (chip->remap_addr == NULL) {
+		snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
+		snd_atiixp_free(chip);
+		return -EIO;
+	}
+
+	if (request_irq(pci->irq, snd_atiixp_interrupt, SA_INTERRUPT|SA_SHIRQ, card->shortname, (void *)chip)) {
+		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
+		snd_atiixp_free(chip);
+		return -EBUSY;
+	}
+	chip->irq = pci->irq;
+	pci_set_master(pci);
+	synchronize_irq(chip->irq);
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
+		snd_atiixp_free(chip);
+		return err;
+	}
+
+	snd_card_set_dev(card, &pci->dev);
+
+	*r_chip = chip;
+	return 0;
+}
+
+
+static int __devinit snd_atiixp_probe(struct pci_dev *pci,
+				      const struct pci_device_id *pci_id)
+{
+	static int dev;
+	snd_card_t *card;
+	atiixp_t *chip;
+	unsigned char revision;
+	int err;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+	if (card == NULL)
+		return -ENOMEM;
+
+	pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
+
+	strcpy(card->driver, "ATIIXP-MODEM");
+	strcpy(card->shortname, "ATI IXP Modem");
+	if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
+		goto __error;
+
+	if ((err = snd_atiixp_aclink_reset(chip)) < 0)
+		goto __error;
+
+	if ((err = snd_atiixp_mixer_new(chip, ac97_clock[dev])) < 0)
+		goto __error;
+
+	if ((err = snd_atiixp_pcm_new(chip)) < 0)
+		goto __error;
+	
+	snd_atiixp_proc_init(chip);
+
+	snd_atiixp_chip_start(chip);
+
+	sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
+		card->shortname, revision, chip->addr, chip->irq);
+
+	snd_card_set_pm_callback(card, snd_atiixp_suspend, snd_atiixp_resume, chip);
+
+	if ((err = snd_card_register(card)) < 0)
+		goto __error;
+
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+
+ __error:
+	snd_card_free(card);
+	return err;
+}
+
+static void __devexit snd_atiixp_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver driver = {
+	.name = "ATI IXP MC97 controller",
+	.id_table = snd_atiixp_ids,
+	.probe = snd_atiixp_probe,
+	.remove = __devexit_p(snd_atiixp_remove),
+	SND_PCI_PM_CALLBACKS
+};
+
+
+static int __init alsa_card_atiixp_init(void)
+{
+	return pci_module_init(&driver);
+}
+
+static void __exit alsa_card_atiixp_exit(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_atiixp_init)
+module_exit(alsa_card_atiixp_exit)