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, 2346 insertions, 0 deletions

diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
new file mode 100644
index 00000000000..f1ce808501d
--- /dev/null
+++ b/sound/pci/via82xx.c
@@ -0,0 +1,2346 @@
+/*
+ *   ALSA driver for VIA VT82xx (South Bridge)
+ *
+ *   VT82C686A/B/C, VT8233A/C, VT8235
+ *
+ *	Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
+ *	                   Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
+ *                    2002 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
+ *
+ */
+
+/*
+ * Changes:
+ *
+ * Dec. 19, 2002	Takashi Iwai <tiwai@suse.de>
+ *	- use the DSX channels for the first pcm playback.
+ *	  (on VIA8233, 8233C and 8235 only)
+ *	  this will allow you play simultaneously up to 4 streams.
+ *	  multi-channel playback is assigned to the second device
+ *	  on these chips.
+ *	- support the secondary capture (on VIA8233/C,8235)
+ *	- SPDIF support
+ *	  the DSX3 channel can be used for SPDIF output.
+ *	  on VIA8233A, this channel is assigned to the second pcm
+ *	  playback.
+ *	  the card config of alsa-lib will assign the correct
+ *	  device for applications.
+ *	- clean up the code, separate low-level initialization
+ *	  routines for each chipset.
+ */
+
+#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/gameport.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/mpu401.h>
+#include <sound/initval.h>
+
+#if 0
+#define POINTER_DEBUG
+#endif
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("VIA VT82xx audio");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C,pci},{VIA,VT8233A/C,8235}}");
+
+#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
+#define SUPPORT_JOYSTICK 1
+#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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+static long mpu_port[SNDRV_CARDS];
+#ifdef SUPPORT_JOYSTICK
+static int joystick[SNDRV_CARDS];
+#endif
+static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
+static char *ac97_quirk[SNDRV_CARDS];
+static int dxs_support[SNDRV_CARDS];
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable audio part of VIA 82xx bridge.");
+module_param_array(mpu_port, long, NULL, 0444);
+MODULE_PARM_DESC(mpu_port, "MPU-401 port. (VT82C686x only)");
+#ifdef SUPPORT_JOYSTICK
+module_param_array(joystick, bool, NULL, 0444);
+MODULE_PARM_DESC(joystick, "Enable joystick. (VT82C686x only)");
+#endif
+module_param_array(ac97_clock, int, NULL, 0444);
+MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
+module_param_array(ac97_quirk, charp, NULL, 0444);
+MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
+module_param_array(dxs_support, int, NULL, 0444);
+MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA)");
+
+
+/* pci ids */
+#ifndef PCI_DEVICE_ID_VIA_82C686_5
+#define PCI_DEVICE_ID_VIA_82C686_5	0x3058
+#endif
+#ifndef PCI_DEVICE_ID_VIA_8233_5
+#define PCI_DEVICE_ID_VIA_8233_5	0x3059
+#endif
+
+/* revision numbers for via686 */
+#define VIA_REV_686_A		0x10
+#define VIA_REV_686_B		0x11
+#define VIA_REV_686_C		0x12
+#define VIA_REV_686_D		0x13
+#define VIA_REV_686_E		0x14
+#define VIA_REV_686_H		0x20
+
+/* revision numbers for via8233 */
+#define VIA_REV_PRE_8233	0x10	/* not in market */
+#define VIA_REV_8233C		0x20	/* 2 rec, 4 pb, 1 multi-pb */
+#define VIA_REV_8233		0x30	/* 2 rec, 4 pb, 1 multi-pb, spdif */
+#define VIA_REV_8233A		0x40	/* 1 rec, 1 multi-pb, spdf */
+#define VIA_REV_8235		0x50	/* 2 rec, 4 pb, 1 multi-pb, spdif */
+#define VIA_REV_8237		0x60
+
+/*
+ *  Direct registers
+ */
+
+#define VIAREG(via, x) ((via)->port + VIA_REG_##x)
+#define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
+
+/* common offsets */
+#define VIA_REG_OFFSET_STATUS		0x00	/* byte - channel status */
+#define   VIA_REG_STAT_ACTIVE		0x80	/* RO */
+#define   VIA_REG_STAT_PAUSED		0x40	/* RO */
+#define   VIA_REG_STAT_TRIGGER_QUEUED	0x08	/* RO */
+#define   VIA_REG_STAT_STOPPED		0x04	/* RWC */
+#define   VIA_REG_STAT_EOL		0x02	/* RWC */
+#define   VIA_REG_STAT_FLAG		0x01	/* RWC */
+#define VIA_REG_OFFSET_CONTROL		0x01	/* byte - channel control */
+#define   VIA_REG_CTRL_START		0x80	/* WO */
+#define   VIA_REG_CTRL_TERMINATE	0x40	/* WO */
+#define   VIA_REG_CTRL_AUTOSTART	0x20
+#define   VIA_REG_CTRL_PAUSE		0x08	/* RW */
+#define   VIA_REG_CTRL_INT_STOP		0x04		
+#define   VIA_REG_CTRL_INT_EOL		0x02
+#define   VIA_REG_CTRL_INT_FLAG		0x01
+#define   VIA_REG_CTRL_RESET		0x01	/* RW - probably reset? undocumented */
+#define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
+#define VIA_REG_OFFSET_TYPE		0x02	/* byte - channel type (686 only) */
+#define   VIA_REG_TYPE_AUTOSTART	0x80	/* RW - autostart at EOL */
+#define   VIA_REG_TYPE_16BIT		0x20	/* RW */
+#define   VIA_REG_TYPE_STEREO		0x10	/* RW */
+#define   VIA_REG_TYPE_INT_LLINE	0x00
+#define   VIA_REG_TYPE_INT_LSAMPLE	0x04
+#define   VIA_REG_TYPE_INT_LESSONE	0x08
+#define   VIA_REG_TYPE_INT_MASK		0x0c
+#define   VIA_REG_TYPE_INT_EOL		0x02
+#define   VIA_REG_TYPE_INT_FLAG		0x01
+#define VIA_REG_OFFSET_TABLE_PTR	0x04	/* dword - channel table pointer */
+#define VIA_REG_OFFSET_CURR_PTR		0x04	/* dword - channel current pointer */
+#define VIA_REG_OFFSET_STOP_IDX		0x08	/* dword - stop index, channel type, sample rate */
+#define   VIA8233_REG_TYPE_16BIT	0x00200000	/* RW */
+#define   VIA8233_REG_TYPE_STEREO	0x00100000	/* RW */
+#define VIA_REG_OFFSET_CURR_COUNT	0x0c	/* dword - channel current count (24 bit) */
+#define VIA_REG_OFFSET_CURR_INDEX	0x0f	/* byte - channel current index (for via8233 only) */
+
+#define DEFINE_VIA_REGSET(name,val) \
+enum {\
+	VIA_REG_##name##_STATUS		= (val),\
+	VIA_REG_##name##_CONTROL	= (val) + 0x01,\
+	VIA_REG_##name##_TYPE		= (val) + 0x02,\
+	VIA_REG_##name##_TABLE_PTR	= (val) + 0x04,\
+	VIA_REG_##name##_CURR_PTR	= (val) + 0x04,\
+	VIA_REG_##name##_STOP_IDX	= (val) + 0x08,\
+	VIA_REG_##name##_CURR_COUNT	= (val) + 0x0c,\
+}
+
+/* playback block */
+DEFINE_VIA_REGSET(PLAYBACK, 0x00);
+DEFINE_VIA_REGSET(CAPTURE, 0x10);
+DEFINE_VIA_REGSET(FM, 0x20);
+
+/* AC'97 */
+#define VIA_REG_AC97			0x80	/* dword */
+#define   VIA_REG_AC97_CODEC_ID_MASK	(3<<30)
+#define   VIA_REG_AC97_CODEC_ID_SHIFT	30
+#define   VIA_REG_AC97_CODEC_ID_PRIMARY	0x00
+#define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
+#define   VIA_REG_AC97_SECONDARY_VALID	(1<<27)
+#define   VIA_REG_AC97_PRIMARY_VALID	(1<<25)
+#define   VIA_REG_AC97_BUSY		(1<<24)
+#define   VIA_REG_AC97_READ		(1<<23)
+#define   VIA_REG_AC97_CMD_SHIFT	16
+#define   VIA_REG_AC97_CMD_MASK		0x7e
+#define   VIA_REG_AC97_DATA_SHIFT	0
+#define   VIA_REG_AC97_DATA_MASK	0xffff
+
+#define VIA_REG_SGD_SHADOW		0x84	/* dword */
+/* via686 */
+#define   VIA_REG_SGD_STAT_PB_FLAG	(1<<0)
+#define   VIA_REG_SGD_STAT_CP_FLAG	(1<<1)
+#define   VIA_REG_SGD_STAT_FM_FLAG	(1<<2)
+#define   VIA_REG_SGD_STAT_PB_EOL	(1<<4)
+#define   VIA_REG_SGD_STAT_CP_EOL	(1<<5)
+#define   VIA_REG_SGD_STAT_FM_EOL	(1<<6)
+#define   VIA_REG_SGD_STAT_PB_STOP	(1<<8)
+#define   VIA_REG_SGD_STAT_CP_STOP	(1<<9)
+#define   VIA_REG_SGD_STAT_FM_STOP	(1<<10)
+#define   VIA_REG_SGD_STAT_PB_ACTIVE	(1<<12)
+#define   VIA_REG_SGD_STAT_CP_ACTIVE	(1<<13)
+#define   VIA_REG_SGD_STAT_FM_ACTIVE	(1<<14)
+/* via8233 */
+#define   VIA8233_REG_SGD_STAT_FLAG	(1<<0)
+#define   VIA8233_REG_SGD_STAT_EOL	(1<<1)
+#define   VIA8233_REG_SGD_STAT_STOP	(1<<2)
+#define   VIA8233_REG_SGD_STAT_ACTIVE	(1<<3)
+#define VIA8233_INTR_MASK(chan) ((VIA8233_REG_SGD_STAT_FLAG|VIA8233_REG_SGD_STAT_EOL) << ((chan) * 4))
+#define   VIA8233_REG_SGD_CHAN_SDX	0
+#define   VIA8233_REG_SGD_CHAN_MULTI	4
+#define   VIA8233_REG_SGD_CHAN_REC	6
+#define   VIA8233_REG_SGD_CHAN_REC1	7
+
+#define VIA_REG_GPI_STATUS		0x88
+#define VIA_REG_GPI_INTR		0x8c
+
+/* multi-channel and capture registers for via8233 */
+DEFINE_VIA_REGSET(MULTPLAY, 0x40);
+DEFINE_VIA_REGSET(CAPTURE_8233, 0x60);
+
+/* via8233-specific registers */
+#define VIA_REG_OFS_PLAYBACK_VOLUME_L	0x02	/* byte */
+#define VIA_REG_OFS_PLAYBACK_VOLUME_R	0x03	/* byte */
+#define VIA_REG_OFS_MULTPLAY_FORMAT	0x02	/* byte - format and channels */
+#define   VIA_REG_MULTPLAY_FMT_8BIT	0x00
+#define   VIA_REG_MULTPLAY_FMT_16BIT	0x80
+#define   VIA_REG_MULTPLAY_FMT_CH_MASK	0x70	/* # channels << 4 (valid = 1,2,4,6) */
+#define VIA_REG_OFS_CAPTURE_FIFO	0x02	/* byte - bit 6 = fifo  enable */
+#define   VIA_REG_CAPTURE_FIFO_ENABLE	0x40
+
+#define VIA_DXS_MAX_VOLUME		31	/* max. volume (attenuation) of reg 0x32/33 */
+
+#define VIA_REG_CAPTURE_CHANNEL		0x63	/* byte - input select */
+#define   VIA_REG_CAPTURE_CHANNEL_MIC	0x4
+#define   VIA_REG_CAPTURE_CHANNEL_LINE	0
+#define   VIA_REG_CAPTURE_SELECT_CODEC	0x03	/* recording source codec (0 = primary) */
+
+#define VIA_TBL_BIT_FLAG	0x40000000
+#define VIA_TBL_BIT_EOL		0x80000000
+
+/* pci space */
+#define VIA_ACLINK_STAT		0x40
+#define  VIA_ACLINK_C11_READY	0x20
+#define  VIA_ACLINK_C10_READY	0x10
+#define  VIA_ACLINK_C01_READY	0x04 /* secondary codec ready */
+#define  VIA_ACLINK_LOWPOWER	0x02 /* low-power state */
+#define  VIA_ACLINK_C00_READY	0x01 /* primary codec ready */
+#define VIA_ACLINK_CTRL		0x41
+#define  VIA_ACLINK_CTRL_ENABLE	0x80 /* 0: disable, 1: enable */
+#define  VIA_ACLINK_CTRL_RESET	0x40 /* 0: assert, 1: de-assert */
+#define  VIA_ACLINK_CTRL_SYNC	0x20 /* 0: release SYNC, 1: force SYNC hi */
+#define  VIA_ACLINK_CTRL_SDO	0x10 /* 0: release SDO, 1: force SDO hi */
+#define  VIA_ACLINK_CTRL_VRA	0x08 /* 0: disable VRA, 1: enable VRA */
+#define  VIA_ACLINK_CTRL_PCM	0x04 /* 0: disable PCM, 1: enable PCM */
+#define  VIA_ACLINK_CTRL_FM	0x02 /* via686 only */
+#define  VIA_ACLINK_CTRL_SB	0x01 /* via686 only */
+#define  VIA_ACLINK_CTRL_INIT	(VIA_ACLINK_CTRL_ENABLE|\
+				 VIA_ACLINK_CTRL_RESET|\
+				 VIA_ACLINK_CTRL_PCM|\
+				 VIA_ACLINK_CTRL_VRA)
+#define VIA_FUNC_ENABLE		0x42
+#define  VIA_FUNC_MIDI_PNP	0x80 /* FIXME: it's 0x40 in the datasheet! */
+#define  VIA_FUNC_MIDI_IRQMASK	0x40 /* FIXME: not documented! */
+#define  VIA_FUNC_RX2C_WRITE	0x20
+#define  VIA_FUNC_SB_FIFO_EMPTY	0x10
+#define  VIA_FUNC_ENABLE_GAME	0x08
+#define  VIA_FUNC_ENABLE_FM	0x04
+#define  VIA_FUNC_ENABLE_MIDI	0x02
+#define  VIA_FUNC_ENABLE_SB	0x01
+#define VIA_PNP_CONTROL		0x43
+#define VIA_FM_NMI_CTRL		0x48
+#define VIA8233_VOLCHG_CTRL	0x48
+#define VIA8233_SPDIF_CTRL	0x49
+#define  VIA8233_SPDIF_DX3	0x08
+#define  VIA8233_SPDIF_SLOT_MASK	0x03
+#define  VIA8233_SPDIF_SLOT_1011	0x00
+#define  VIA8233_SPDIF_SLOT_34		0x01
+#define  VIA8233_SPDIF_SLOT_78		0x02
+#define  VIA8233_SPDIF_SLOT_69		0x03
+
+/*
+ */
+
+#define VIA_DXS_AUTO	0
+#define VIA_DXS_ENABLE	1
+#define VIA_DXS_DISABLE	2
+#define VIA_DXS_48K	3
+#define VIA_DXS_NO_VRA	4
+
+
+/*
+ */
+
+typedef struct _snd_via82xx via82xx_t;
+typedef struct via_dev viadev_t;
+
+/*
+ * pcm stream
+ */
+
+struct snd_via_sg_table {
+	unsigned int offset;
+	unsigned int size;
+} ;
+
+#define VIA_TABLE_SIZE	255
+
+struct via_dev {
+	unsigned int reg_offset;
+	unsigned long port;
+	int direction;	/* playback = 0, capture = 1 */
+        snd_pcm_substream_t *substream;
+	int running;
+	unsigned int tbl_entries; /* # descriptors */
+	struct snd_dma_buffer table;
+	struct snd_via_sg_table *idx_table;
+	/* for recovery from the unexpected pointer */
+	unsigned int lastpos;
+	unsigned int fragsize;
+	unsigned int bufsize;
+	unsigned int bufsize2;
+};
+
+
+enum { TYPE_CARD_VIA686 = 1, TYPE_CARD_VIA8233 };
+enum { TYPE_VIA686, TYPE_VIA8233, TYPE_VIA8233A };
+
+#define VIA_MAX_DEVS	7	/* 4 playback, 1 multi, 2 capture */
+
+struct via_rate_lock {
+	spinlock_t lock;
+	int rate;
+	int used;
+};
+
+struct _snd_via82xx {
+	int irq;
+
+	unsigned long port;
+	struct resource *mpu_res;
+	int chip_type;
+	unsigned char revision;
+
+	unsigned char old_legacy;
+	unsigned char old_legacy_cfg;
+#ifdef CONFIG_PM
+	unsigned char legacy_saved;
+	unsigned char legacy_cfg_saved;
+	unsigned char spdif_ctrl_saved;
+	unsigned char capture_src_saved[2];
+	unsigned int mpu_port_saved;
+#endif
+
+	unsigned char playback_volume[2]; /* for VIA8233/C/8235; default = 0 */
+
+	unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
+
+	struct pci_dev *pci;
+	snd_card_t *card;
+
+	unsigned int num_devs;
+	unsigned int playback_devno, multi_devno, capture_devno;
+	viadev_t devs[VIA_MAX_DEVS];
+	struct via_rate_lock rates[2]; /* playback and capture */
+	unsigned int dxs_fixed: 1;	/* DXS channel accepts only 48kHz */
+	unsigned int no_vra: 1;		/* no need to set VRA on DXS channels */
+	unsigned int spdif_on: 1;	/* only spdif rates work to external DACs */
+
+	snd_pcm_t *pcms[2];
+	snd_rawmidi_t *rmidi;
+
+	ac97_bus_t *ac97_bus;
+	ac97_t *ac97;
+	unsigned int ac97_clock;
+	unsigned int ac97_secondary;	/* secondary AC'97 codec is present */
+
+	spinlock_t reg_lock;
+	snd_info_entry_t *proc_entry;
+
+#ifdef SUPPORT_JOYSTICK
+	struct gameport *gameport;
+#endif
+};
+
+static struct pci_device_id snd_via82xx_ids[] = {
+	{ 0x1106, 0x3058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA686, },	/* 686A */
+	{ 0x1106, 0x3059, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA8233, },	/* VT8233 */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, snd_via82xx_ids);
+
+/*
+ */
+
+/*
+ * allocate and initialize the descriptor buffers
+ * periods = number of periods
+ * fragsize = period size in bytes
+ */
+static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
+			   struct pci_dev *pci,
+			   unsigned int periods, unsigned int fragsize)
+{
+	unsigned int i, idx, ofs, rest;
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
+
+	if (dev->table.area == NULL) {
+		/* the start of each lists must be aligned to 8 bytes,
+		 * but the kernel pages are much bigger, so we don't care
+		 */
+		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
+					PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
+					&dev->table) < 0)
+			return -ENOMEM;
+	}
+	if (! dev->idx_table) {
+		dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
+		if (! dev->idx_table)
+			return -ENOMEM;
+	}
+
+	/* fill the entries */
+	idx = 0;
+	ofs = 0;
+	for (i = 0; i < periods; i++) {
+		rest = fragsize;
+		/* fill descriptors for a period.
+		 * a period can be split to several descriptors if it's
+		 * over page boundary.
+		 */
+		do {
+			unsigned int r;
+			unsigned int flag;
+
+			if (idx >= VIA_TABLE_SIZE) {
+				snd_printk(KERN_ERR "via82xx: too much table size!\n");
+				return -EINVAL;
+			}
+			((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
+			r = PAGE_SIZE - (ofs % PAGE_SIZE);
+			if (rest < r)
+				r = rest;
+			rest -= r;
+			if (! rest) {
+				if (i == periods - 1)
+					flag = VIA_TBL_BIT_EOL; /* buffer boundary */
+				else
+					flag = VIA_TBL_BIT_FLAG; /* period boundary */
+			} else
+				flag = 0; /* period continues to the next */
+			// printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
+			((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
+			dev->idx_table[idx].offset = ofs;
+			dev->idx_table[idx].size = r;
+			ofs += r;
+			idx++;
+		} while (rest > 0);
+	}
+	dev->tbl_entries = idx;
+	dev->bufsize = periods * fragsize;
+	dev->bufsize2 = dev->bufsize / 2;
+	dev->fragsize = fragsize;
+	return 0;
+}
+
+
+static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
+			   struct pci_dev *pci)
+{
+	if (dev->table.area) {
+		snd_dma_free_pages(&dev->table);
+		dev->table.area = NULL;
+	}
+	if (dev->idx_table) {
+		kfree(dev->idx_table);
+		dev->idx_table = NULL;
+	}
+	return 0;
+}
+
+/*
+ *  Basic I/O
+ */
+
+static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
+{
+	return inl(VIAREG(chip, AC97));
+}
+ 
+static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
+{
+	outl(val, VIAREG(chip, AC97));
+}
+ 
+static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
+{
+	unsigned int timeout = 1000;	/* 1ms */
+	unsigned int val;
+	
+	while (timeout-- > 0) {
+		udelay(1);
+		if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
+			return val & 0xffff;
+	}
+	snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
+	return -EIO;
+}
+ 
+static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
+{
+	unsigned int timeout = 1000;	/* 1ms */
+	unsigned int val, val1;
+	unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
+					 VIA_REG_AC97_SECONDARY_VALID;
+	
+	while (timeout-- > 0) {
+		val = snd_via82xx_codec_xread(chip);
+		val1 = val & (VIA_REG_AC97_BUSY | stat);
+		if (val1 == stat)
+			return val & 0xffff;
+		udelay(1);
+	}
+	return -EIO;
+}
+ 
+static void snd_via82xx_codec_wait(ac97_t *ac97)
+{
+	via82xx_t *chip = ac97->private_data;
+	int err;
+	err = snd_via82xx_codec_ready(chip, ac97->num);
+	/* here we need to wait fairly for long time.. */
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(HZ/2);
+}
+
+static void snd_via82xx_codec_write(ac97_t *ac97,
+				    unsigned short reg,
+				    unsigned short val)
+{
+	via82xx_t *chip = ac97->private_data;
+	unsigned int xval;
+	
+	xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
+	xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
+	xval |= reg << VIA_REG_AC97_CMD_SHIFT;
+	xval |= val << VIA_REG_AC97_DATA_SHIFT;
+	snd_via82xx_codec_xwrite(chip, xval);
+	snd_via82xx_codec_ready(chip, ac97->num);
+}
+
+static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
+{
+	via82xx_t *chip = ac97->private_data;
+	unsigned int xval, val = 0xffff;
+	int again = 0;
+
+	xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
+	xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
+	xval |= VIA_REG_AC97_READ;
+	xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
+      	while (1) {
+      		if (again++ > 3) {
+			snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
+		      	return 0xffff;
+		}
+		snd_via82xx_codec_xwrite(chip, xval);
+		udelay (20);
+		if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
+			udelay(25);
+			val = snd_via82xx_codec_xread(chip);
+			break;
+		}
+	}
+	return val & 0xffff;
+}
+
+static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
+{
+	outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
+	     VIADEV_REG(viadev, OFFSET_CONTROL));
+	inb(VIADEV_REG(viadev, OFFSET_CONTROL));
+	udelay(50);
+	/* disable interrupts */
+	outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
+	/* clear interrupts */
+	outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
+	outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
+	// outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
+	viadev->lastpos = 0;
+}
+
+
+/*
+ *  Interrupt handler
+ */
+
+static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	via82xx_t *chip = dev_id;
+	unsigned int status;
+	unsigned int i;
+
+	status = inl(VIAREG(chip, SGD_SHADOW));
+	if (! (status & chip->intr_mask)) {
+		if (chip->rmidi)
+			/* check mpu401 interrupt */
+			return snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
+		return IRQ_NONE;
+	}
+
+	/* check status for each stream */
+	spin_lock(&chip->reg_lock);
+	for (i = 0; i < chip->num_devs; i++) {
+		viadev_t *viadev = &chip->devs[i];
+		unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
+		c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
+		if (! c_status)
+			continue;
+		if (viadev->substream && viadev->running) {
+			spin_unlock(&chip->reg_lock);
+			snd_pcm_period_elapsed(viadev->substream);
+			spin_lock(&chip->reg_lock);
+		}
+		outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
+	}
+	spin_unlock(&chip->reg_lock);
+	return IRQ_HANDLED;
+}
+
+/*
+ *  PCM callbacks
+ */
+
+/*
+ * trigger callback
+ */
+static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	unsigned char val;
+
+	if (chip->chip_type != TYPE_VIA686)
+		val = VIA_REG_CTRL_INT;
+	else
+		val = 0;
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		val |= VIA_REG_CTRL_START;
+		viadev->running = 1;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		val = VIA_REG_CTRL_TERMINATE;
+		viadev->running = 0;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		val |= VIA_REG_CTRL_PAUSE;
+		viadev->running = 0;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		viadev->running = 1;
+		break;
+	default:
+		return -EINVAL;
+	}
+	outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
+	if (cmd == SNDRV_PCM_TRIGGER_STOP)
+		snd_via82xx_channel_reset(chip, viadev);
+	return 0;
+}
+
+
+/*
+ * pointer callbacks
+ */
+
+/*
+ * calculate the linear position at the given sg-buffer index and the rest count
+ */
+
+#define check_invalid_pos(viadev,pos) \
+	((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
+
+static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
+{
+	unsigned int size, base, res;
+
+	size = viadev->idx_table[idx].size;
+	base = viadev->idx_table[idx].offset;
+	res = base + size - count;
+
+	/* check the validity of the calculated position */
+	if (size < count) {
+		snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
+		res = viadev->lastpos;
+	} else {
+		if (! count) {
+			/* Some mobos report count = 0 on the DMA boundary,
+			 * i.e. count = size indeed.
+			 * Let's check whether this step is above the expected size.
+			 */
+			int delta = res - viadev->lastpos;
+			if (delta < 0)
+				delta += viadev->bufsize;
+			if ((unsigned int)delta > viadev->fragsize)
+				res = base;
+		}
+		if (check_invalid_pos(viadev, res)) {
+#ifdef POINTER_DEBUG
+			printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
+#endif
+			/* count register returns full size when end of buffer is reached */
+			res = base + size;
+			if (check_invalid_pos(viadev, res)) {
+				snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
+				res = viadev->lastpos;
+			}
+		}
+	}
+	viadev->lastpos = res; /* remember the last position */
+	if (res >= viadev->bufsize)
+		res -= viadev->bufsize;
+	return res;
+}
+
+/*
+ * get the current pointer on via686
+ */
+static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	unsigned int idx, ptr, count, res;
+
+	snd_assert(viadev->tbl_entries, return 0);
+	if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
+		return 0;
+
+	spin_lock(&chip->reg_lock);
+	count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
+	/* The via686a does not have the current index register,
+	 * so we need to calculate the index from CURR_PTR.
+	 */
+	ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
+	if (ptr <= (unsigned int)viadev->table.addr)
+		idx = 0;
+	else /* CURR_PTR holds the address + 8 */
+		idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
+	res = calc_linear_pos(viadev, idx, count);
+	spin_unlock(&chip->reg_lock);
+
+	return bytes_to_frames(substream->runtime, res);
+}
+
+/*
+ * get the current pointer on via823x
+ */
+static snd_pcm_uframes_t snd_via8233_pcm_pointer(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	unsigned int idx, count, res;
+	int timeout = 5000;
+	
+	snd_assert(viadev->tbl_entries, return 0);
+	if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
+		return 0;
+	spin_lock(&chip->reg_lock);
+	do {
+		count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT));
+		/* some mobos read 0 count */
+		if ((count & 0xffffff) || ! viadev->running)
+			break;
+	} while (--timeout);
+	if (! timeout)
+		snd_printd(KERN_ERR "zero position is read\n");
+	idx = count >> 24;
+	if (idx >= viadev->tbl_entries) {
+#ifdef POINTER_DEBUG
+		printk("fail: invalid idx = %i/%i\n", idx, viadev->tbl_entries);
+#endif
+		res = viadev->lastpos;
+	} else {
+		count &= 0xffffff;
+		res = calc_linear_pos(viadev, idx, count);
+	}
+	spin_unlock(&chip->reg_lock);
+
+	return bytes_to_frames(substream->runtime, res);
+}
+
+
+/*
+ * hw_params callback:
+ * allocate the buffer and build up the buffer description table
+ */
+static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
+				 snd_pcm_hw_params_t * hw_params)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	int err;
+
+	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+	if (err < 0)
+		return err;
+	err = build_via_table(viadev, substream, chip->pci,
+			      params_periods(hw_params),
+			      params_period_bytes(hw_params));
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+/*
+ * hw_free callback:
+ * clean up the buffer description table and release the buffer
+ */
+static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+
+	clean_via_table(viadev, substream, chip->pci);
+	snd_pcm_lib_free_pages(substream);
+	return 0;
+}
+
+
+/*
+ * set up the table pointer
+ */
+static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
+{
+	snd_via82xx_codec_ready(chip, 0);
+	outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
+	udelay(20);
+	snd_via82xx_codec_ready(chip, 0);
+}
+
+/*
+ * prepare callback for playback and capture on via686
+ */
+static void via686_setup_format(via82xx_t *chip, viadev_t *viadev, snd_pcm_runtime_t *runtime)
+{
+	snd_via82xx_channel_reset(chip, viadev);
+	/* this must be set after channel_reset */
+	snd_via82xx_set_table_ptr(chip, viadev);
+	outb(VIA_REG_TYPE_AUTOSTART |
+	     (runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA_REG_TYPE_16BIT : 0) |
+	     (runtime->channels > 1 ? VIA_REG_TYPE_STEREO : 0) |
+	     ((viadev->reg_offset & 0x10) == 0 ? VIA_REG_TYPE_INT_LSAMPLE : 0) |
+	     VIA_REG_TYPE_INT_EOL |
+	     VIA_REG_TYPE_INT_FLAG, VIADEV_REG(viadev, OFFSET_TYPE));
+}
+
+static int snd_via686_playback_prepare(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
+	snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
+	via686_setup_format(chip, viadev, runtime);
+	return 0;
+}
+
+static int snd_via686_capture_prepare(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
+	via686_setup_format(chip, viadev, runtime);
+	return 0;
+}
+
+/*
+ * lock the current rate
+ */
+static int via_lock_rate(struct via_rate_lock *rec, int rate)
+{
+	int changed = 0;
+
+	spin_lock_irq(&rec->lock);
+	if (rec->rate != rate) {
+		if (rec->rate && rec->used > 1) /* already set */
+			changed = -EINVAL;
+		else {
+			rec->rate = rate;
+			changed = 1;
+		}
+	}
+	spin_unlock_irq(&rec->lock);
+	return changed;
+}
+
+/*
+ * prepare callback for DSX playback on via823x
+ */
+static int snd_via8233_playback_prepare(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int rate_changed;
+	u32 rbits;
+
+	if ((rate_changed = via_lock_rate(&chip->rates[0], runtime->rate)) < 0)
+		return rate_changed;
+	if (rate_changed) {
+		snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE,
+				  chip->no_vra ? 48000 : runtime->rate);
+		snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
+	}
+	if (runtime->rate == 48000)
+		rbits = 0xfffff;
+	else
+		rbits = (0x100000 / 48000) * runtime->rate + ((0x100000 % 48000) * runtime->rate) / 48000;
+	snd_assert((rbits & ~0xfffff) == 0, return -EINVAL);
+	snd_via82xx_channel_reset(chip, viadev);
+	snd_via82xx_set_table_ptr(chip, viadev);
+	outb(chip->playback_volume[0], VIADEV_REG(viadev, OFS_PLAYBACK_VOLUME_L));
+	outb(chip->playback_volume[1], VIADEV_REG(viadev, OFS_PLAYBACK_VOLUME_R));
+	outl((runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA8233_REG_TYPE_16BIT : 0) | /* format */
+	     (runtime->channels > 1 ? VIA8233_REG_TYPE_STEREO : 0) | /* stereo */
+	     rbits | /* rate */
+	     0xff000000,    /* STOP index is never reached */
+	     VIADEV_REG(viadev, OFFSET_STOP_IDX));
+	udelay(20);
+	snd_via82xx_codec_ready(chip, 0);
+	return 0;
+}
+
+/*
+ * prepare callback for multi-channel playback on via823x
+ */
+static int snd_via8233_multi_prepare(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	unsigned int slots;
+	int fmt;
+
+	if (via_lock_rate(&chip->rates[0], runtime->rate) < 0)
+		return -EINVAL;
+	snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
+	snd_ac97_set_rate(chip->ac97, AC97_PCM_SURR_DAC_RATE, runtime->rate);
+	snd_ac97_set_rate(chip->ac97, AC97_PCM_LFE_DAC_RATE, runtime->rate);
+	snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
+	snd_via82xx_channel_reset(chip, viadev);
+	snd_via82xx_set_table_ptr(chip, viadev);
+
+	fmt = (runtime->format == SNDRV_PCM_FORMAT_S16_LE) ? VIA_REG_MULTPLAY_FMT_16BIT : VIA_REG_MULTPLAY_FMT_8BIT;
+	fmt |= runtime->channels << 4;
+	outb(fmt, VIADEV_REG(viadev, OFS_MULTPLAY_FORMAT));
+#if 0
+	if (chip->revision == VIA_REV_8233A)
+		slots = 0;
+	else
+#endif
+	{
+		/* set sample number to slot 3, 4, 7, 8, 6, 9 (for VIA8233/C,8235) */
+		/* corresponding to FL, FR, RL, RR, C, LFE ?? */
+		switch (runtime->channels) {
+		case 1: slots = (1<<0) | (1<<4); break;
+		case 2: slots = (1<<0) | (2<<4); break;
+		case 3: slots = (1<<0) | (2<<4) | (5<<8); break;
+		case 4: slots = (1<<0) | (2<<4) | (3<<8) | (4<<12); break;
+		case 5: slots = (1<<0) | (2<<4) | (3<<8) | (4<<12) | (5<<16); break;
+		case 6: slots = (1<<0) | (2<<4) | (3<<8) | (4<<12) | (5<<16) | (6<<20); break;
+		default: slots = 0; break;
+		}
+	}
+	/* STOP index is never reached */
+	outl(0xff000000 | slots, VIADEV_REG(viadev, OFFSET_STOP_IDX));
+	udelay(20);
+	snd_via82xx_codec_ready(chip, 0);
+	return 0;
+}
+
+/*
+ * prepare callback for capture on via823x
+ */
+static int snd_via8233_capture_prepare(snd_pcm_substream_t *substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	if (via_lock_rate(&chip->rates[1], runtime->rate) < 0)
+		return -EINVAL;
+	snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
+	snd_via82xx_channel_reset(chip, viadev);
+	snd_via82xx_set_table_ptr(chip, viadev);
+	outb(VIA_REG_CAPTURE_FIFO_ENABLE, VIADEV_REG(viadev, OFS_CAPTURE_FIFO));
+	outl((runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA8233_REG_TYPE_16BIT : 0) |
+	     (runtime->channels > 1 ? VIA8233_REG_TYPE_STEREO : 0) |
+	     0xff000000,    /* STOP index is never reached */
+	     VIADEV_REG(viadev, OFFSET_STOP_IDX));
+	udelay(20);
+	snd_via82xx_codec_ready(chip, 0);
+	return 0;
+}
+
+
+/*
+ * pcm hardware definition, identical for both playback and capture
+ */
+static snd_pcm_hardware_t snd_via82xx_hw =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID |
+				 SNDRV_PCM_INFO_RESUME |
+				 SNDRV_PCM_INFO_PAUSE),
+	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
+	.rates =		SNDRV_PCM_RATE_48000,
+	.rate_min =		48000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	128 * 1024,
+	.period_bytes_min =	32,
+	.period_bytes_max =	128 * 1024,
+	.periods_min =		2,
+	.periods_max =		VIA_TABLE_SIZE / 2,
+	.fifo_size =		0,
+};
+
+
+/*
+ * open callback skeleton
+ */
+static int snd_via82xx_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int err;
+	struct via_rate_lock *ratep;
+
+	runtime->hw = snd_via82xx_hw;
+	
+	/* set the hw rate condition */
+	ratep = &chip->rates[viadev->direction];
+	spin_lock_irq(&ratep->lock);
+	ratep->used++;
+	if (chip->spdif_on && viadev->reg_offset == 0x30) {
+		/* DXS#3 and spdif is on */
+		runtime->hw.rates = chip->ac97->rates[AC97_RATES_SPDIF];
+		snd_pcm_limit_hw_rates(runtime);
+	} else if (chip->dxs_fixed && viadev->reg_offset < 0x40) {
+		/* fixed DXS playback rate */
+		runtime->hw.rates = SNDRV_PCM_RATE_48000;
+		runtime->hw.rate_min = runtime->hw.rate_max = 48000;
+	} else if (! ratep->rate) {
+		int idx = viadev->direction ? AC97_RATES_ADC : AC97_RATES_FRONT_DAC;
+		runtime->hw.rates = chip->ac97->rates[idx];
+		snd_pcm_limit_hw_rates(runtime);
+	} else {
+		/* a fixed rate */
+		runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
+		runtime->hw.rate_max = runtime->hw.rate_min = ratep->rate;
+	}
+	spin_unlock_irq(&ratep->lock);
+
+	/* we may remove following constaint when we modify table entries
+	   in interrupt */
+	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+		return err;
+
+	runtime->private_data = viadev;
+	viadev->substream = substream;
+
+	return 0;
+}
+
+
+/*
+ * open callback for playback on via686 and via823x DSX
+ */
+static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
+	int err;
+
+	if ((err = snd_via82xx_pcm_open(chip, viadev, substream)) < 0)
+		return err;
+	return 0;
+}
+
+/*
+ * open callback for playback on via823x multi-channel
+ */
+static int snd_via8233_multi_open(snd_pcm_substream_t * substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = &chip->devs[chip->multi_devno];
+	int err;
+	/* channels constraint for VIA8233A
+	 * 3 and 5 channels are not supported
+	 */
+	static unsigned int channels[] = {
+		1, 2, 4, 6
+	};
+	static snd_pcm_hw_constraint_list_t hw_constraints_channels = {
+		.count = ARRAY_SIZE(channels),
+		.list = channels,
+		.mask = 0,
+	};
+
+	if ((err = snd_via82xx_pcm_open(chip, viadev, substream)) < 0)
+		return err;
+	substream->runtime->hw.channels_max = 6;
+	if (chip->revision == VIA_REV_8233A)
+		snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, &hw_constraints_channels);
+	return 0;
+}
+
+/*
+ * open callback for capture on via686 and via823x
+ */
+static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
+
+	return snd_via82xx_pcm_open(chip, viadev, substream);
+}
+
+/*
+ * close callback
+ */
+static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
+{
+	via82xx_t *chip = snd_pcm_substream_chip(substream);
+	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
+	struct via_rate_lock *ratep;
+
+	/* release the rate lock */
+	ratep = &chip->rates[viadev->direction];
+	spin_lock_irq(&ratep->lock);
+	ratep->used--;
+	if (! ratep->used)
+		ratep->rate = 0;
+	spin_unlock_irq(&ratep->lock);
+
+	viadev->substream = NULL;
+	return 0;
+}
+
+
+/* via686 playback callbacks */
+static snd_pcm_ops_t snd_via686_playback_ops = {
+	.open =		snd_via82xx_playback_open,
+	.close =	snd_via82xx_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_via82xx_hw_params,
+	.hw_free =	snd_via82xx_hw_free,
+	.prepare =	snd_via686_playback_prepare,
+	.trigger =	snd_via82xx_pcm_trigger,
+	.pointer =	snd_via686_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
+/* via686 capture callbacks */
+static snd_pcm_ops_t snd_via686_capture_ops = {
+	.open =		snd_via82xx_capture_open,
+	.close =	snd_via82xx_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_via82xx_hw_params,
+	.hw_free =	snd_via82xx_hw_free,
+	.prepare =	snd_via686_capture_prepare,
+	.trigger =	snd_via82xx_pcm_trigger,
+	.pointer =	snd_via686_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
+/* via823x DSX playback callbacks */
+static snd_pcm_ops_t snd_via8233_playback_ops = {
+	.open =		snd_via82xx_playback_open,
+	.close =	snd_via82xx_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_via82xx_hw_params,
+	.hw_free =	snd_via82xx_hw_free,
+	.prepare =	snd_via8233_playback_prepare,
+	.trigger =	snd_via82xx_pcm_trigger,
+	.pointer =	snd_via8233_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
+/* via823x multi-channel playback callbacks */
+static snd_pcm_ops_t snd_via8233_multi_ops = {
+	.open =		snd_via8233_multi_open,
+	.close =	snd_via82xx_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_via82xx_hw_params,
+	.hw_free =	snd_via82xx_hw_free,
+	.prepare =	snd_via8233_multi_prepare,
+	.trigger =	snd_via82xx_pcm_trigger,
+	.pointer =	snd_via8233_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
+/* via823x capture callbacks */
+static snd_pcm_ops_t snd_via8233_capture_ops = {
+	.open =		snd_via82xx_capture_open,
+	.close =	snd_via82xx_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_via82xx_hw_params,
+	.hw_free =	snd_via82xx_hw_free,
+	.prepare =	snd_via8233_capture_prepare,
+	.trigger =	snd_via82xx_pcm_trigger,
+	.pointer =	snd_via8233_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
+
+static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
+{
+	chip->devs[idx].reg_offset = reg_offset;
+	chip->devs[idx].direction = direction;
+	chip->devs[idx].port = chip->port + reg_offset;
+}
+
+/*
+ * create pcm instances for VIA8233, 8233C and 8235 (not 8233A)
+ */
+static int __devinit snd_via8233_pcm_new(via82xx_t *chip)
+{
+	snd_pcm_t *pcm;
+	int i, err;
+
+	chip->playback_devno = 0;	/* x 4 */
+	chip->multi_devno = 4;		/* x 1 */
+	chip->capture_devno = 5;	/* x 2 */
+	chip->num_devs = 7;
+	chip->intr_mask = 0x33033333; /* FLAG|EOL for rec0-1, mc, sdx0-3 */
+
+	/* PCM #0:  4 DSX playbacks and 1 capture */
+	err = snd_pcm_new(chip->card, chip->card->shortname, 0, 4, 1, &pcm);
+	if (err < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via8233_capture_ops);
+	pcm->private_data = chip;
+	strcpy(pcm->name, chip->card->shortname);
+	chip->pcms[0] = pcm;
+	/* set up playbacks */
+	for (i = 0; i < 4; i++)
+		init_viadev(chip, i, 0x10 * i, 0);
+	/* capture */
+	init_viadev(chip, chip->capture_devno, VIA_REG_CAPTURE_8233_STATUS, 1);
+
+	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
+		return err;
+
+	/* PCM #1:  multi-channel playback and 2nd capture */
+	err = snd_pcm_new(chip->card, chip->card->shortname, 1, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_multi_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via8233_capture_ops);
+	pcm->private_data = chip;
+	strcpy(pcm->name, chip->card->shortname);
+	chip->pcms[1] = pcm;
+	/* set up playback */
+	init_viadev(chip, chip->multi_devno, VIA_REG_MULTPLAY_STATUS, 0);
+	/* set up capture */
+	init_viadev(chip, chip->capture_devno + 1, VIA_REG_CAPTURE_8233_STATUS + 0x10, 1);
+
+	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+						         snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
+		return err;
+
+	return 0;
+}
+
+/*
+ * create pcm instances for VIA8233A
+ */
+static int __devinit snd_via8233a_pcm_new(via82xx_t *chip)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	chip->multi_devno = 0;
+	chip->playback_devno = 1;
+	chip->capture_devno = 2;
+	chip->num_devs = 3;
+	chip->intr_mask = 0x03033000; /* FLAG|EOL for rec0, mc, sdx3 */
+
+	/* PCM #0:  multi-channel playback and capture */
+	err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_multi_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via8233_capture_ops);
+	pcm->private_data = chip;
+	strcpy(pcm->name, chip->card->shortname);
+	chip->pcms[0] = pcm;
+	/* set up playback */
+	init_viadev(chip, chip->multi_devno, VIA_REG_MULTPLAY_STATUS, 0);
+	/* capture */
+	init_viadev(chip, chip->capture_devno, VIA_REG_CAPTURE_8233_STATUS, 1);
+
+	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
+		return err;
+
+	/* SPDIF supported? */
+	if (! ac97_can_spdif(chip->ac97))
+		return 0;
+
+	/* PCM #1:  DXS3 playback (for spdif) */
+	err = snd_pcm_new(chip->card, chip->card->shortname, 1, 1, 0, &pcm);
+	if (err < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_playback_ops);
+	pcm->private_data = chip;
+	strcpy(pcm->name, chip->card->shortname);
+	chip->pcms[1] = pcm;
+	/* set up playback */
+	init_viadev(chip, chip->playback_devno, 0x30, 0);
+
+	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
+		return err;
+
+	return 0;
+}
+
+/*
+ * create a pcm instance for via686a/b
+ */
+static int __devinit snd_via686_pcm_new(via82xx_t *chip)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	chip->playback_devno = 0;
+	chip->capture_devno = 1;
+	chip->num_devs = 2;
+	chip->intr_mask = 0x77; /* FLAG | EOL for PB, CP, FM */
+
+	err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
+	pcm->private_data = chip;
+	strcpy(pcm->name, chip->card->shortname);
+	chip->pcms[0] = pcm;
+	init_viadev(chip, 0, VIA_REG_PLAYBACK_STATUS, 0);
+	init_viadev(chip, 1, VIA_REG_CAPTURE_STATUS, 1);
+
+	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
+		return err;
+
+	return 0;
+}
+
+
+/*
+ *  Mixer part
+ */
+
+static int snd_via8233_capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	/* formerly they were "Line" and "Mic", but it looks like that they
+	 * have nothing to do with the actual physical connections...
+	 */
+	static char *texts[2] = {
+		"Input1", "Input2"
+	};
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = 2;
+	if (uinfo->value.enumerated.item >= 2)
+		uinfo->value.enumerated.item = 1;
+	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
+	return 0;
+}
+
+static int snd_via8233_capture_source_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long port = chip->port + (kcontrol->id.index ? (VIA_REG_CAPTURE_CHANNEL + 0x10) : VIA_REG_CAPTURE_CHANNEL);
+	ucontrol->value.enumerated.item[0] = inb(port) & VIA_REG_CAPTURE_CHANNEL_MIC ? 1 : 0;
+	return 0;
+}
+
+static int snd_via8233_capture_source_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long port = chip->port + (kcontrol->id.index ? (VIA_REG_CAPTURE_CHANNEL + 0x10) : VIA_REG_CAPTURE_CHANNEL);
+	u8 val, oval;
+
+	spin_lock_irq(&chip->reg_lock);
+	oval = inb(port);
+	val = oval & ~VIA_REG_CAPTURE_CHANNEL_MIC;
+	if (ucontrol->value.enumerated.item[0])
+		val |= VIA_REG_CAPTURE_CHANNEL_MIC;
+	if (val != oval)
+		outb(val, port);
+	spin_unlock_irq(&chip->reg_lock);
+	return val != oval;
+}
+
+static snd_kcontrol_new_t snd_via8233_capture_source __devinitdata = {
+	.name = "Input Source Select",
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.info = snd_via8233_capture_source_info,
+	.get = snd_via8233_capture_source_get,
+	.put = snd_via8233_capture_source_put,
+};
+
+static int snd_via8233_dxs3_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+	return 0;
+}
+
+static int snd_via8233_dxs3_spdif_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
+	u8 val;
+
+	pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &val);
+	ucontrol->value.integer.value[0] = (val & VIA8233_SPDIF_DX3) ? 1 : 0;
+	return 0;
+}
+
+static int snd_via8233_dxs3_spdif_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
+	u8 val, oval;
+
+	pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &oval);
+	val = oval & ~VIA8233_SPDIF_DX3;
+	if (ucontrol->value.integer.value[0])
+		val |= VIA8233_SPDIF_DX3;
+	/* save the spdif flag for rate filtering */
+	chip->spdif_on = ucontrol->value.integer.value[0] ? 1 : 0;
+	if (val != oval) {
+		pci_write_config_byte(chip->pci, VIA8233_SPDIF_CTRL, val);
+		return 1;
+	}
+	return 0;
+}
+
+static snd_kcontrol_new_t snd_via8233_dxs3_spdif_control __devinitdata = {
+	.name = "IEC958 Output Switch",
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.info = snd_via8233_dxs3_spdif_info,
+	.get = snd_via8233_dxs3_spdif_get,
+	.put = snd_via8233_dxs3_spdif_put,
+};
+
+static int snd_via8233_dxs_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = VIA_DXS_MAX_VOLUME;
+	return 0;
+}
+
+static int snd_via8233_dxs_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
+	ucontrol->value.integer.value[0] = VIA_DXS_MAX_VOLUME - chip->playback_volume[0];
+	ucontrol->value.integer.value[1] = VIA_DXS_MAX_VOLUME - chip->playback_volume[1];
+	return 0;
+}
+
+static int snd_via8233_dxs_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned int idx;
+	unsigned char val;
+	int i, change = 0;
+
+	for (i = 0; i < 2; i++) {
+		val = ucontrol->value.integer.value[i];
+		if (val > VIA_DXS_MAX_VOLUME)
+			val = VIA_DXS_MAX_VOLUME;
+		val = VIA_DXS_MAX_VOLUME - val;
+		if (val != chip->playback_volume[i]) {
+			change = 1;
+			chip->playback_volume[i] = val;
+			for (idx = 0; idx < 4; idx++) {
+				unsigned long port = chip->port + 0x10 * idx;
+				outb(val, port + VIA_REG_OFS_PLAYBACK_VOLUME_L + i);
+			}
+		}
+	}
+	return change;
+}
+
+static snd_kcontrol_new_t snd_via8233_dxs_volume_control __devinitdata = {
+	.name = "PCM Playback Volume",
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.info = snd_via8233_dxs_volume_info,
+	.get = snd_via8233_dxs_volume_get,
+	.put = snd_via8233_dxs_volume_put,
+};
+
+/*
+ */
+
+static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
+{
+	via82xx_t *chip = bus->private_data;
+	chip->ac97_bus = NULL;
+}
+
+static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
+{
+	via82xx_t *chip = ac97->private_data;
+	chip->ac97 = NULL;
+}
+
+static struct ac97_quirk ac97_quirks[] = {
+	{
+		.vendor = 0x1106,
+		.device = 0x4161,
+		.codec_id = 0x56494161, /* VT1612A */
+		.name = "Soltek SL-75DRV5",
+		.type = AC97_TUNE_NONE
+	},
+	{	/* FIXME: which codec? */
+		.vendor = 0x1106,
+		.device = 0x4161,
+		.name = "ASRock K7VT2",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1019,
+		.device = 0x0a81,
+		.name = "ECS K7VTA3",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1019,
+		.device = 0x0a85,
+		.name = "ECS L7VMM2",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1849,
+		.device = 0x3059,
+		.name = "ASRock K7VM2",
+		.type = AC97_TUNE_HP_ONLY	/* VT1616 */
+	},
+	{
+		.vendor = 0x14cd,
+		.device = 0x7002,
+		.name = "Unknown",
+		.type = AC97_TUNE_ALC_JACK
+	},
+	{
+		.vendor = 0x1071,
+		.device = 0x8590,
+		.name = "Mitac Mobo",
+		.type = AC97_TUNE_ALC_JACK
+	},
+	{
+		.vendor = 0x161f,
+		.device = 0x202b,
+		.name = "Arima Notebook",
+		.type = AC97_TUNE_HP_ONLY,
+	},
+	{ } /* terminator */
+};
+
+static int __devinit snd_via82xx_mixer_new(via82xx_t *chip, const char *quirk_override)
+{
+	ac97_template_t ac97;
+	int err;
+	static ac97_bus_ops_t ops = {
+		.write = snd_via82xx_codec_write,
+		.read = snd_via82xx_codec_read,
+		.wait = snd_via82xx_codec_wait,
+	};
+
+	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
+		return err;
+	chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
+	chip->ac97_bus->clock = chip->ac97_clock;
+	chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
+
+	memset(&ac97, 0, sizeof(ac97));
+	ac97.private_data = chip;
+	ac97.private_free = snd_via82xx_mixer_free_ac97;
+	ac97.pci = chip->pci;
+	if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
+		return err;
+
+	snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
+
+	if (chip->chip_type != TYPE_VIA686) {
+		/* use slot 10/11 */
+		snd_ac97_update_bits(chip->ac97, AC97_EXTENDED_STATUS, 0x03 << 4, 0x03 << 4);
+	}
+
+	return 0;
+}
+
+#ifdef SUPPORT_JOYSTICK
+#define JOYSTICK_ADDR	0x200
+static int __devinit snd_via686_create_gameport(via82xx_t *chip, int dev, unsigned char *legacy)
+{
+	struct gameport *gp;
+	struct resource *r;
+
+	if (!joystick[dev])
+		return -ENODEV;
+
+	r = request_region(JOYSTICK_ADDR, 8, "VIA686 gameport");
+	if (!r) {
+		printk(KERN_WARNING "via82xx: cannot reserve joystick port 0x%#x\n", JOYSTICK_ADDR);
+		return -EBUSY;
+	}
+
+	chip->gameport = gp = gameport_allocate_port();
+	if (!gp) {
+		printk(KERN_ERR "via82xx: cannot allocate memory for gameport\n");
+		release_resource(r);
+		kfree_nocheck(r);
+		return -ENOMEM;
+	}
+
+	gameport_set_name(gp, "VIA686 Gameport");
+	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
+	gameport_set_dev_parent(gp, &chip->pci->dev);
+	gp->io = JOYSTICK_ADDR;
+	gameport_set_port_data(gp, r);
+
+	/* Enable legacy joystick port */
+	*legacy |= VIA_FUNC_ENABLE_GAME;
+	pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, *legacy);
+
+	gameport_register_port(chip->gameport);
+
+	return 0;
+}
+
+static void snd_via686_free_gameport(via82xx_t *chip)
+{
+	if (chip->gameport) {
+		struct resource *r = gameport_get_port_data(chip->gameport);
+
+		gameport_unregister_port(chip->gameport);
+		chip->gameport = NULL;
+		release_resource(r);
+		kfree_nocheck(r);
+	}
+}
+#else
+static inline int snd_via686_create_gameport(via82xx_t *chip, int dev, unsigned char *legacy)
+{
+	return -ENOSYS;
+}
+static inline void snd_via686_free_gameport(via82xx_t *chip) { }
+#endif
+
+
+/*
+ *
+ */
+
+static int __devinit snd_via8233_init_misc(via82xx_t *chip, int dev)
+{
+	int i, err, caps;
+	unsigned char val;
+
+	caps = chip->chip_type == TYPE_VIA8233A ? 1 : 2;
+	for (i = 0; i < caps; i++) {
+		snd_via8233_capture_source.index = i;
+		err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_via8233_capture_source, chip));
+		if (err < 0)
+			return err;
+	}
+	if (ac97_can_spdif(chip->ac97)) {
+		err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_via8233_dxs3_spdif_control, chip));
+		if (err < 0)
+			return err;
+	}
+	if (chip->chip_type != TYPE_VIA8233A) {
+		/* when no h/w PCM volume control is found, use DXS volume control
+		 * as the PCM vol control
+		 */
+		snd_ctl_elem_id_t sid;
+		memset(&sid, 0, sizeof(sid));
+		strcpy(sid.name, "PCM Playback Volume");
+		sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+		if (! snd_ctl_find_id(chip->card, &sid)) {
+			err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_via8233_dxs_volume_control, chip));
+			if (err < 0)
+				return err;
+		}
+	}
+
+	/* select spdif data slot 10/11 */
+	pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &val);
+	val = (val & ~VIA8233_SPDIF_SLOT_MASK) | VIA8233_SPDIF_SLOT_1011;
+	val &= ~VIA8233_SPDIF_DX3; /* SPDIF off as default */
+	pci_write_config_byte(chip->pci, VIA8233_SPDIF_CTRL, val);
+
+	return 0;
+}
+
+static int __devinit snd_via686_init_misc(via82xx_t *chip, int dev)
+{
+	unsigned char legacy, legacy_cfg;
+	int rev_h = 0;
+
+	legacy = chip->old_legacy;
+	legacy_cfg = chip->old_legacy_cfg;
+	legacy |= VIA_FUNC_MIDI_IRQMASK;	/* FIXME: correct? (disable MIDI) */
+	legacy &= ~VIA_FUNC_ENABLE_GAME;	/* disable joystick */
+	if (chip->revision >= VIA_REV_686_H) {
+		rev_h = 1;
+		if (mpu_port[dev] >= 0x200) {	/* force MIDI */
+			mpu_port[dev] &= 0xfffc;
+			pci_write_config_dword(chip->pci, 0x18, mpu_port[dev] | 0x01);
+#ifdef CONFIG_PM
+			chip->mpu_port_saved = mpu_port[dev];
+#endif
+		} else {
+			mpu_port[dev] = pci_resource_start(chip->pci, 2);
+		}
+	} else {
+		switch (mpu_port[dev]) {	/* force MIDI */
+		case 0x300:
+		case 0x310:
+		case 0x320:
+		case 0x330:
+			legacy_cfg &= ~(3 << 2);
+			legacy_cfg |= (mpu_port[dev] & 0x0030) >> 2;
+			break;
+		default:			/* no, use BIOS settings */
+			if (legacy & VIA_FUNC_ENABLE_MIDI)
+				mpu_port[dev] = 0x300 + ((legacy_cfg & 0x000c) << 2);
+			break;
+		}
+	}
+	if (mpu_port[dev] >= 0x200 &&
+	    (chip->mpu_res = request_region(mpu_port[dev], 2, "VIA82xx MPU401")) != NULL) {
+		if (rev_h)
+			legacy |= VIA_FUNC_MIDI_PNP;	/* enable PCI I/O 2 */
+		legacy |= VIA_FUNC_ENABLE_MIDI;
+	} else {
+		if (rev_h)
+			legacy &= ~VIA_FUNC_MIDI_PNP;	/* disable PCI I/O 2 */
+		legacy &= ~VIA_FUNC_ENABLE_MIDI;
+		mpu_port[dev] = 0;
+	}
+
+	pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, legacy);
+	pci_write_config_byte(chip->pci, VIA_PNP_CONTROL, legacy_cfg);
+	if (chip->mpu_res) {
+		if (snd_mpu401_uart_new(chip->card, 0, MPU401_HW_VIA686A,
+					mpu_port[dev], 1,
+					chip->irq, 0, &chip->rmidi) < 0) {
+			printk(KERN_WARNING "unable to initialize MPU-401 at 0x%lx, skipping\n", mpu_port[dev]);
+			legacy &= ~VIA_FUNC_ENABLE_MIDI;
+		} else {
+			legacy &= ~VIA_FUNC_MIDI_IRQMASK;	/* enable MIDI interrupt */
+		}
+		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, legacy);
+	}
+
+	snd_via686_create_gameport(chip, dev, &legacy);
+
+#ifdef CONFIG_PM
+	chip->legacy_saved = legacy;
+	chip->legacy_cfg_saved = legacy_cfg;
+#endif
+
+	return 0;
+}
+
+
+/*
+ * proc interface
+ */
+static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+{
+	via82xx_t *chip = entry->private_data;
+	int i;
+	
+	snd_iprintf(buffer, "%s\n\n", chip->card->longname);
+	for (i = 0; i < 0xa0; i += 4) {
+		snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
+	}
+}
+
+static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
+{
+	snd_info_entry_t *entry;
+
+	if (! snd_card_proc_new(chip->card, "via82xx", &entry))
+		snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
+}
+
+/*
+ *
+ */
+
+static int __devinit snd_via82xx_chip_init(via82xx_t *chip)
+{
+	unsigned int val;
+	int max_count;
+	unsigned char pval;
+
+#if 0 /* broken on K7M? */
+	if (chip->chip_type == TYPE_VIA686)
+		/* disable all legacy ports */
+		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, 0);
+#endif
+	pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
+	if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
+		/* deassert ACLink reset, force SYNC */
+		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
+				      VIA_ACLINK_CTRL_ENABLE |
+				      VIA_ACLINK_CTRL_RESET |
+				      VIA_ACLINK_CTRL_SYNC);
+		udelay(100);
+#if 1 /* FIXME: should we do full reset here for all chip models? */
+		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
+		udelay(100);
+#else
+		/* deassert ACLink reset, force SYNC (warm AC'97 reset) */
+		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
+				      VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
+		udelay(2);
+#endif
+		/* ACLink on, deassert ACLink reset, VSR, SGD data out */
+		/* note - FM data out has trouble with non VRA codecs !! */
+		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
+		udelay(100);
+	}
+	
+	/* Make sure VRA is enabled, in case we didn't do a
+	 * complete codec reset, above */
+	pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
+	if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
+		/* ACLink on, deassert ACLink reset, VSR, SGD data out */
+		/* note - FM data out has trouble with non VRA codecs !! */
+		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
+		udelay(100);
+	}
+
+	/* wait until codec ready */
+	max_count = ((3 * HZ) / 4) + 1;
+	do {
+		pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
+		if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
+			break;
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+	} while (--max_count > 0);
+
+	if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
+		snd_printk("AC'97 codec is not ready [0x%x]\n", val);
+
+#if 0 /* FIXME: we don't support the second codec yet so skip the detection now.. */
+	snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
+				 VIA_REG_AC97_SECONDARY_VALID |
+				 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
+	max_count = ((3 * HZ) / 4) + 1;
+	snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
+				 VIA_REG_AC97_SECONDARY_VALID |
+				 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
+	do {
+		if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
+			chip->ac97_secondary = 1;
+			goto __ac97_ok2;
+		}
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(1);
+	} while (--max_count > 0);
+	/* This is ok, the most of motherboards have only one codec */
+
+      __ac97_ok2:
+#endif
+
+	if (chip->chip_type == TYPE_VIA686) {
+		/* route FM trap to IRQ, disable FM trap */
+		pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
+		/* disable all GPI interrupts */
+		outl(0, VIAREG(chip, GPI_INTR));
+	}
+
+	if (chip->chip_type != TYPE_VIA686) {
+		/* Workaround for Award BIOS bug:
+		 * DXS channels don't work properly with VRA if MC97 is disabled.
+		 */
+		struct pci_dev *pci;
+		pci = pci_find_device(0x1106, 0x3068, NULL); /* MC97 */
+		if (pci) {
+			unsigned char data;
+			pci_read_config_byte(pci, 0x44, &data);
+			pci_write_config_byte(pci, 0x44, data | 0x40);
+		}
+	}
+
+	if (chip->chip_type != TYPE_VIA8233A) {
+		int i, idx;
+		for (idx = 0; idx < 4; idx++) {
+			unsigned long port = chip->port + 0x10 * idx;
+			for (i = 0; i < 2; i++)
+				outb(chip->playback_volume[i], port + VIA_REG_OFS_PLAYBACK_VOLUME_L + i);
+		}
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+/*
+ * power management
+ */
+static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
+{
+	via82xx_t *chip = card->pm_private_data;
+	int i;
+
+	for (i = 0; i < 2; i++)
+		if (chip->pcms[i])
+			snd_pcm_suspend_all(chip->pcms[i]);
+	for (i = 0; i < chip->num_devs; i++)
+		snd_via82xx_channel_reset(chip, &chip->devs[i]);
+	synchronize_irq(chip->irq);
+	snd_ac97_suspend(chip->ac97);
+
+	/* save misc values */
+	if (chip->chip_type != TYPE_VIA686) {
+		pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &chip->spdif_ctrl_saved);
+		chip->capture_src_saved[0] = inb(chip->port + VIA_REG_CAPTURE_CHANNEL);
+		chip->capture_src_saved[1] = inb(chip->port + VIA_REG_CAPTURE_CHANNEL + 0x10);
+	}
+
+	pci_set_power_state(chip->pci, 3);
+	pci_disable_device(chip->pci);
+	return 0;
+}
+
+static int snd_via82xx_resume(snd_card_t *card)
+{
+	via82xx_t *chip = card->pm_private_data;
+	int i;
+
+	pci_enable_device(chip->pci);
+	pci_set_power_state(chip->pci, 0);
+
+	snd_via82xx_chip_init(chip);
+
+	if (chip->chip_type == TYPE_VIA686) {
+		if (chip->mpu_port_saved)
+			pci_write_config_dword(chip->pci, 0x18, chip->mpu_port_saved | 0x01);
+		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, chip->legacy_saved);
+		pci_write_config_byte(chip->pci, VIA_PNP_CONTROL, chip->legacy_cfg_saved);
+	} else {
+		pci_write_config_byte(chip->pci, VIA8233_SPDIF_CTRL, chip->spdif_ctrl_saved);
+		outb(chip->capture_src_saved[0], chip->port + VIA_REG_CAPTURE_CHANNEL);
+		outb(chip->capture_src_saved[1], chip->port + VIA_REG_CAPTURE_CHANNEL + 0x10);
+	}
+
+	snd_ac97_resume(chip->ac97);
+
+	for (i = 0; i < chip->num_devs; i++)
+		snd_via82xx_channel_reset(chip, &chip->devs[i]);
+
+	return 0;
+}
+#endif /* CONFIG_PM */
+
+static int snd_via82xx_free(via82xx_t *chip)
+{
+	unsigned int i;
+
+	if (chip->irq < 0)
+		goto __end_hw;
+	/* disable interrupts */
+	for (i = 0; i < chip->num_devs; i++)
+		snd_via82xx_channel_reset(chip, &chip->devs[i]);
+	synchronize_irq(chip->irq);
+      __end_hw:
+	if (chip->irq >= 0)
+		free_irq(chip->irq, (void *)chip);
+	if (chip->mpu_res) {
+		release_resource(chip->mpu_res);
+		kfree_nocheck(chip->mpu_res);
+	}
+	pci_release_regions(chip->pci);
+
+	if (chip->chip_type == TYPE_VIA686) {
+		snd_via686_free_gameport(chip);
+		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, chip->old_legacy);
+		pci_write_config_byte(chip->pci, VIA_PNP_CONTROL, chip->old_legacy_cfg);
+	}
+	pci_disable_device(chip->pci);
+	kfree(chip);
+	return 0;
+}
+
+static int snd_via82xx_dev_free(snd_device_t *device)
+{
+	via82xx_t *chip = device->device_data;
+	return snd_via82xx_free(chip);
+}
+
+static int __devinit snd_via82xx_create(snd_card_t * card,
+					struct pci_dev *pci,
+					int chip_type,
+					int revision,
+					unsigned int ac97_clock,
+					via82xx_t ** r_via)
+{
+	via82xx_t *chip;
+	int err;
+        static snd_device_ops_t ops = {
+		.dev_free =	snd_via82xx_dev_free,
+        };
+
+	if ((err = pci_enable_device(pci)) < 0)
+		return err;
+
+	if ((chip = kcalloc(1, sizeof(*chip), GFP_KERNEL)) == NULL) {
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+
+	chip->chip_type = chip_type;
+	chip->revision = revision;
+
+	spin_lock_init(&chip->reg_lock);
+	spin_lock_init(&chip->rates[0].lock);
+	spin_lock_init(&chip->rates[1].lock);
+	chip->card = card;
+	chip->pci = pci;
+	chip->irq = -1;
+
+	pci_read_config_byte(pci, VIA_FUNC_ENABLE, &chip->old_legacy);
+	pci_read_config_byte(pci, VIA_PNP_CONTROL, &chip->old_legacy_cfg);
+	pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE,
+			      chip->old_legacy & ~(VIA_FUNC_ENABLE_SB|VIA_FUNC_ENABLE_FM));
+
+	if ((err = pci_request_regions(pci, card->driver)) < 0) {
+		kfree(chip);
+		pci_disable_device(pci);
+		return err;
+	}
+	chip->port = pci_resource_start(pci, 0);
+	if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
+			card->driver, (void *)chip)) {
+		snd_printk("unable to grab IRQ %d\n", pci->irq);
+		snd_via82xx_free(chip);
+		return -EBUSY;
+	}
+	chip->irq = pci->irq;
+	if (ac97_clock >= 8000 && ac97_clock <= 48000)
+		chip->ac97_clock = ac97_clock;
+	synchronize_irq(chip->irq);
+
+	if ((err = snd_via82xx_chip_init(chip)) < 0) {
+		snd_via82xx_free(chip);
+		return err;
+	}
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
+		snd_via82xx_free(chip);
+		return err;
+	}
+
+	/* The 8233 ac97 controller does not implement the master bit
+	 * in the pci command register. IMHO this is a violation of the PCI spec.
+	 * We call pci_set_master here because it does not hurt. */
+	pci_set_master(pci);
+
+	snd_card_set_dev(card, &pci->dev);
+
+	*r_via = chip;
+	return 0;
+}
+
+struct via823x_info {
+	int revision;
+	char *name;
+	int type;
+};
+static struct via823x_info via823x_cards[] __devinitdata = {
+	{ VIA_REV_PRE_8233, "VIA 8233-Pre", TYPE_VIA8233 },
+	{ VIA_REV_8233C, "VIA 8233C", TYPE_VIA8233 },
+	{ VIA_REV_8233, "VIA 8233", TYPE_VIA8233 },
+	{ VIA_REV_8233A, "VIA 8233A", TYPE_VIA8233A },
+	{ VIA_REV_8235, "VIA 8235", TYPE_VIA8233 },
+	{ VIA_REV_8237, "VIA 8237", TYPE_VIA8233 },
+};
+
+/*
+ * auto detection of DXS channel supports.
+ */
+struct dxs_whitelist {
+	unsigned short vendor;
+	unsigned short device; 
+	unsigned short mask; 
+	short action;	/* new dxs_support value */
+};
+
+static int __devinit check_dxs_list(struct pci_dev *pci)
+{
+	static struct dxs_whitelist whitelist[] = {
+		{ .vendor = 0x1005, .device = 0x4710, .action = VIA_DXS_ENABLE }, /* Avance Logic Mobo */
+		{ .vendor = 0x1019, .device = 0x0996, .action = VIA_DXS_48K },
+		{ .vendor = 0x1019, .device = 0x0a81, .action = VIA_DXS_NO_VRA }, /* ECS K7VTA3 v8.0 */
+		{ .vendor = 0x1019, .device = 0x0a85, .action = VIA_DXS_NO_VRA }, /* ECS L7VMM2 */
+		{ .vendor = 0x1025, .device = 0x0033, .action = VIA_DXS_NO_VRA }, /* Acer Inspire 1353LM */
+		{ .vendor = 0x1043, .device = 0x8095, .action = VIA_DXS_NO_VRA }, /* ASUS A7V8X (FIXME: possibly VIA_DXS_ENABLE?)*/
+		{ .vendor = 0x1043, .device = 0x80a1, .action = VIA_DXS_NO_VRA }, /* ASUS A7V8-X */
+		{ .vendor = 0x1043, .device = 0x80b0, .action = VIA_DXS_NO_VRA }, /* ASUS A7V600 & K8V*/ 
+		{ .vendor = 0x1071, .device = 0x8375, .action = VIA_DXS_NO_VRA }, /* Vobis/Yakumo/Mitac notebook */
+		{ .vendor = 0x10cf, .device = 0x118e, .action = VIA_DXS_ENABLE }, /* FSC laptop */
+		{ .vendor = 0x1106, .device = 0x4161, .action = VIA_DXS_NO_VRA }, /* ASRock K7VT2 */
+		{ .vendor = 0x1106, .device = 0x4552, .action = VIA_DXS_NO_VRA }, /* QDI Kudoz 7X/600-6AL */
+		{ .vendor = 0x1106, .device = 0xaa01, .action = VIA_DXS_NO_VRA }, /* EPIA MII */
+		{ .vendor = 0x1297, .device = 0xa232, .action = VIA_DXS_ENABLE }, /* Shuttle ?? */
+		{ .vendor = 0x1297, .device = 0xc160, .action = VIA_DXS_ENABLE }, /* Shuttle SK41G */
+		{ .vendor = 0x1458, .device = 0xa002, .action = VIA_DXS_ENABLE }, /* Gigabyte GA-7VAXP */
+		{ .vendor = 0x1462, .device = 0x3800, .action = VIA_DXS_ENABLE }, /* MSI KT266 */
+		{ .vendor = 0x1462, .device = 0x5901, .action = VIA_DXS_NO_VRA }, /* MSI KT6 Delta-SR */
+		{ .vendor = 0x1462, .device = 0x7023, .action = VIA_DXS_NO_VRA }, /* MSI K8T Neo2-FI */
+		{ .vendor = 0x1462, .device = 0x7120, .action = VIA_DXS_ENABLE }, /* MSI KT4V */
+		{ .vendor = 0x147b, .device = 0x1401, .action = VIA_DXS_ENABLE }, /* ABIT KD7(-RAID) */
+		{ .vendor = 0x147b, .device = 0x1411, .action = VIA_DXS_ENABLE }, /* ABIT VA-20 */
+		{ .vendor = 0x147b, .device = 0x1413, .action = VIA_DXS_ENABLE }, /* ABIT KV8 Pro */
+		{ .vendor = 0x147b, .device = 0x1415, .action = VIA_DXS_NO_VRA }, /* Abit AV8 */
+		{ .vendor = 0x14ff, .device = 0x0403, .action = VIA_DXS_ENABLE }, /* Twinhead mobo */
+		{ .vendor = 0x1584, .device = 0x8120, .action = VIA_DXS_ENABLE }, /* Gericom/Targa/Vobis/Uniwill laptop */
+		{ .vendor = 0x1584, .device = 0x8123, .action = VIA_DXS_NO_VRA }, /* Uniwill (Targa Visionary XP-210) */
+		{ .vendor = 0x161f, .device = 0x202b, .action = VIA_DXS_NO_VRA }, /* Amira Note book */
+		{ .vendor = 0x161f, .device = 0x2032, .action = VIA_DXS_48K }, /* m680x machines */
+		{ .vendor = 0x1631, .device = 0xe004, .action = VIA_DXS_ENABLE }, /* Easy Note 3174, Packard Bell */
+		{ .vendor = 0x1695, .device = 0x3005, .action = VIA_DXS_ENABLE }, /* EPoX EP-8K9A */
+		{ .vendor = 0x1849, .device = 0x3059, .action = VIA_DXS_NO_VRA }, /* ASRock K7VM2 */
+		{ } /* terminator */
+	};
+	struct dxs_whitelist *w;
+	unsigned short subsystem_vendor;
+	unsigned short subsystem_device;
+
+	pci_read_config_word(pci, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vendor);
+	pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &subsystem_device);
+
+	for (w = whitelist; w->vendor; w++) {
+		if (w->vendor != subsystem_vendor)
+			continue;
+		if (w->mask) {
+			if ((w->mask & subsystem_device) == w->device)
+				return w->action;
+		} else {
+			if (subsystem_device == w->device)
+				return w->action;
+		}
+	}
+
+	/*
+	 * not detected, try 48k rate only to be sure.
+	 */
+	printk(KERN_INFO "via82xx: Assuming DXS channels with 48k fixed sample rate.\n");
+	printk(KERN_INFO "         Please try dxs_support=1 or dxs_support=4 option\n");
+	printk(KERN_INFO "         and report if it works on your machine.\n");
+	return VIA_DXS_48K;
+};
+
+static int __devinit snd_via82xx_probe(struct pci_dev *pci,
+				       const struct pci_device_id *pci_id)
+{
+	static int dev;
+	snd_card_t *card;
+	via82xx_t *chip;
+	unsigned char revision;
+	int chip_type = 0, card_type;
+	unsigned int i;
+	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;
+
+	card_type = pci_id->driver_data;
+	pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
+	switch (card_type) {
+	case TYPE_CARD_VIA686:
+		strcpy(card->driver, "VIA686A");
+		sprintf(card->shortname, "VIA 82C686A/B rev%x", revision);
+		chip_type = TYPE_VIA686;
+		break;
+	case TYPE_CARD_VIA8233:
+		chip_type = TYPE_VIA8233;
+		sprintf(card->shortname, "VIA 823x rev%x", revision);
+		for (i = 0; i < ARRAY_SIZE(via823x_cards); i++) {
+			if (revision == via823x_cards[i].revision) {
+				chip_type = via823x_cards[i].type;
+				strcpy(card->shortname, via823x_cards[i].name);
+				break;
+			}
+		}
+		if (chip_type != TYPE_VIA8233A) {
+			if (dxs_support[dev] == VIA_DXS_AUTO)
+				dxs_support[dev] = check_dxs_list(pci);
+			/* force to use VIA8233 or 8233A model according to
+			 * dxs_support module option
+			 */
+			if (dxs_support[dev] == VIA_DXS_DISABLE)
+				chip_type = TYPE_VIA8233A;
+			else
+				chip_type = TYPE_VIA8233;
+		}
+		if (chip_type == TYPE_VIA8233A)
+			strcpy(card->driver, "VIA8233A");
+		else if (revision >= VIA_REV_8237)
+			strcpy(card->driver, "VIA8237"); /* no slog assignment */
+		else
+			strcpy(card->driver, "VIA8233");
+		break;
+	default:
+		snd_printk(KERN_ERR "invalid card type %d\n", card_type);
+		err = -EINVAL;
+		goto __error;
+	}
+		
+	if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
+		goto __error;
+	if ((err = snd_via82xx_mixer_new(chip, ac97_quirk[dev])) < 0)
+		goto __error;
+
+	if (chip_type == TYPE_VIA686) {
+		if ((err = snd_via686_pcm_new(chip)) < 0 ||
+		    (err = snd_via686_init_misc(chip, dev)) < 0)
+			goto __error;
+	} else {
+		if (chip_type == TYPE_VIA8233A) {
+			if ((err = snd_via8233a_pcm_new(chip)) < 0)
+				goto __error;
+			// chip->dxs_fixed = 1; /* FIXME: use 48k for DXS #3? */
+		} else {
+			if ((err = snd_via8233_pcm_new(chip)) < 0)
+				goto __error;
+			if (dxs_support[dev] == VIA_DXS_48K)
+				chip->dxs_fixed = 1;
+			else if (dxs_support[dev] == VIA_DXS_NO_VRA)
+				chip->no_vra = 1;
+		}
+		if ((err = snd_via8233_init_misc(chip, dev)) < 0)
+			goto __error;
+	}
+
+	snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
+
+	/* disable interrupts */
+	for (i = 0; i < chip->num_devs; i++)
+		snd_via82xx_channel_reset(chip, &chip->devs[i]);
+
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s with %s at %#lx, irq %d", card->shortname,
+		 snd_ac97_get_short_name(chip->ac97), chip->port, chip->irq);
+
+	snd_via82xx_proc_init(chip);
+
+	if ((err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+
+ __error:
+	snd_card_free(card);
+	return err;
+}
+
+static void __devexit snd_via82xx_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver driver = {
+	.name = "VIA 82xx Audio",
+	.id_table = snd_via82xx_ids,
+	.probe = snd_via82xx_probe,
+	.remove = __devexit_p(snd_via82xx_remove),
+	SND_PCI_PM_CALLBACKS
+};
+
+static int __init alsa_card_via82xx_init(void)
+{
+	return pci_module_init(&driver);
+}
+
+static void __exit alsa_card_via82xx_exit(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_via82xx_init)
+module_exit(alsa_card_via82xx_exit)