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, 3615 insertions, 0 deletions

diff --git a/sound/oss/via82cxxx_audio.c b/sound/oss/via82cxxx_audio.c
new file mode 100644
index 00000000000..b387e1e5248
--- /dev/null
+++ b/sound/oss/via82cxxx_audio.c
@@ -0,0 +1,3615 @@
+/*
+ * Support for VIA 82Cxxx Audio Codecs
+ * Copyright 1999,2000 Jeff Garzik
+ *
+ * Updated to support the VIA 8233/8235 audio subsystem
+ * Alan Cox <alan@redhat.com> (C) Copyright 2002, 2003 Red Hat Inc
+ *
+ * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
+ * See the "COPYING" file distributed with this software for more info.
+ * NO WARRANTY
+ *
+ * For a list of known bugs (errata) and documentation,
+ * see via-audio.pdf in Documentation/DocBook.
+ * If this documentation does not exist, run "make pdfdocs".
+ */
+
+
+#define VIA_VERSION	"1.9.1-ac4-2.5"
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/sound.h>
+#include <linux/poll.h>
+#include <linux/soundcard.h>
+#include <linux/ac97_codec.h>
+#include <linux/smp_lock.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include "sound_config.h"
+#include "dev_table.h"
+#include "mpu401.h"
+
+
+#undef VIA_DEBUG	/* define to enable debugging output and checks */
+#ifdef VIA_DEBUG
+/* note: prints function name for you */
+#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#undef VIA_NDEBUG	/* define to disable lightweight runtime checks */
+#ifdef VIA_NDEBUG
+#define assert(expr)
+#else
+#define assert(expr) \
+        if(!(expr)) {					\
+        printk( "Assertion failed! %s,%s,%s,line=%d\n",	\
+        #expr,__FILE__,__FUNCTION__,__LINE__);		\
+        }
+#endif
+
+#define VIA_SUPPORT_MMAP 1 /* buggy, for now... */
+
+#define MAX_CARDS	1
+
+#define VIA_CARD_NAME	"VIA 82Cxxx Audio driver " VIA_VERSION
+#define VIA_MODULE_NAME "via82cxxx"
+#define PFX		VIA_MODULE_NAME ": "
+
+#define VIA_COUNTER_LIMIT	100000
+
+/* size of DMA buffers */
+#define VIA_MAX_BUFFER_DMA_PAGES	32
+
+/* buffering default values in ms */
+#define VIA_DEFAULT_FRAG_TIME		20
+#define VIA_DEFAULT_BUFFER_TIME		500
+
+/* the hardware has a 256 fragment limit */
+#define VIA_MIN_FRAG_NUMBER		2
+#define VIA_MAX_FRAG_NUMBER		128
+
+#define VIA_MAX_FRAG_SIZE		PAGE_SIZE
+#define VIA_MIN_FRAG_SIZE		(VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER)
+
+
+/* 82C686 function 5 (audio codec) PCI configuration registers */
+#define VIA_ACLINK_STATUS	0x40
+#define VIA_ACLINK_CTRL		0x41
+#define VIA_FUNC_ENABLE		0x42
+#define VIA_PNP_CONTROL		0x43
+#define VIA_FM_NMI_CTRL		0x48
+
+/*
+ * controller base 0 (scatter-gather) registers
+ *
+ * NOTE: Via datasheet lists first channel as "read"
+ * channel and second channel as "write" channel.
+ * I changed the naming of the constants to be more
+ * clear than I felt the datasheet to be.
+ */
+
+#define VIA_BASE0_PCM_OUT_CHAN	0x00 /* output PCM to user */
+#define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00
+#define VIA_BASE0_PCM_OUT_CHAN_CTRL	0x01
+#define VIA_BASE0_PCM_OUT_CHAN_TYPE	0x02
+
+#define VIA_BASE0_PCM_IN_CHAN		0x10 /* input PCM from user */
+#define VIA_BASE0_PCM_IN_CHAN_STATUS	0x10
+#define VIA_BASE0_PCM_IN_CHAN_CTRL	0x11
+#define VIA_BASE0_PCM_IN_CHAN_TYPE	0x12
+
+/* offsets from base */
+#define VIA_PCM_STATUS			0x00
+#define VIA_PCM_CONTROL			0x01
+#define VIA_PCM_TYPE			0x02
+#define VIA_PCM_LEFTVOL			0x02
+#define VIA_PCM_RIGHTVOL		0x03
+#define VIA_PCM_TABLE_ADDR		0x04
+#define VIA_PCM_STOPRATE		0x08	/* 8233+ */
+#define VIA_PCM_BLOCK_COUNT		0x0C
+
+/* XXX unused DMA channel for FM PCM data */
+#define VIA_BASE0_FM_OUT_CHAN		0x20
+#define VIA_BASE0_FM_OUT_CHAN_STATUS	0x20
+#define VIA_BASE0_FM_OUT_CHAN_CTRL	0x21
+#define VIA_BASE0_FM_OUT_CHAN_TYPE	0x22
+
+/* Six channel audio output on 8233 */
+#define VIA_BASE0_MULTI_OUT_CHAN		0x40
+#define VIA_BASE0_MULTI_OUT_CHAN_STATUS		0x40
+#define VIA_BASE0_MULTI_OUT_CHAN_CTRL		0x41
+#define VIA_BASE0_MULTI_OUT_CHAN_TYPE		0x42
+
+#define VIA_BASE0_AC97_CTRL		0x80
+#define VIA_BASE0_SGD_STATUS_SHADOW	0x84
+#define VIA_BASE0_GPI_INT_ENABLE	0x8C
+#define VIA_INTR_OUT			((1<<0) |  (1<<4) |  (1<<8))
+#define VIA_INTR_IN			((1<<1) |  (1<<5) |  (1<<9))
+#define VIA_INTR_FM			((1<<2) |  (1<<6) | (1<<10))
+#define VIA_INTR_MASK		(VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM)
+
+/* Newer VIA we need to monitor the low 3 bits of each channel. This
+   mask covers the channels we don't yet use as well 
+ */
+ 
+#define VIA_NEW_INTR_MASK		0x77077777UL
+
+/* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */
+#define VIA_IRQ_ON_FLAG			(1<<0)	/* int on each flagged scatter block */
+#define VIA_IRQ_ON_EOL			(1<<1)	/* int at end of scatter list */
+#define VIA_INT_SEL_PCI_LAST_LINE_READ	(0)	/* int at PCI read of last line */
+#define VIA_INT_SEL_LAST_SAMPLE_SENT	(1<<2)	/* int at last sample sent */
+#define VIA_INT_SEL_ONE_LINE_LEFT	(1<<3)	/* int at less than one line to send */
+#define VIA_PCM_FMT_STEREO		(1<<4)	/* PCM stereo format (bit clear == mono) */
+#define VIA_PCM_FMT_16BIT		(1<<5)	/* PCM 16-bit format (bit clear == 8-bit) */
+#define VIA_PCM_REC_FIFO		(1<<6)	/* PCM Recording FIFO */
+#define VIA_RESTART_SGD_ON_EOL		(1<<7)	/* restart scatter-gather at EOL */
+#define VIA_PCM_FMT_MASK		(VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT)
+#define VIA_CHAN_TYPE_MASK		(VIA_RESTART_SGD_ON_EOL | \
+					 VIA_IRQ_ON_FLAG | \
+					 VIA_IRQ_ON_EOL)
+#define VIA_CHAN_TYPE_INT_SELECT	(VIA_INT_SEL_LAST_SAMPLE_SENT)
+
+/* PCI configuration register bits and masks */
+#define VIA_CR40_AC97_READY	0x01
+#define VIA_CR40_AC97_LOW_POWER	0x02
+#define VIA_CR40_SECONDARY_READY 0x04
+
+#define VIA_CR41_AC97_ENABLE	0x80 /* enable AC97 codec */
+#define VIA_CR41_AC97_RESET	0x40 /* clear bit to reset AC97 */
+#define VIA_CR41_AC97_WAKEUP	0x20 /* wake up from power-down mode */
+#define VIA_CR41_AC97_SDO	0x10 /* force Serial Data Out (SDO) high */
+#define VIA_CR41_VRA		0x08 /* enable variable sample rate */
+#define VIA_CR41_PCM_ENABLE	0x04 /* AC Link SGD Read Channel PCM Data Output */
+#define VIA_CR41_FM_PCM_ENABLE	0x02 /* AC Link FM Channel PCM Data Out */
+#define VIA_CR41_SB_PCM_ENABLE	0x01 /* AC Link SB PCM Data Output */
+#define VIA_CR41_BOOT_MASK	(VIA_CR41_AC97_ENABLE | \
+				 VIA_CR41_AC97_WAKEUP | \
+				 VIA_CR41_AC97_SDO)
+#define VIA_CR41_RUN_MASK	(VIA_CR41_AC97_ENABLE | \
+				 VIA_CR41_AC97_RESET | \
+				 VIA_CR41_VRA | \
+				 VIA_CR41_PCM_ENABLE)
+
+#define VIA_CR42_SB_ENABLE	0x01
+#define VIA_CR42_MIDI_ENABLE	0x02
+#define VIA_CR42_FM_ENABLE	0x04
+#define VIA_CR42_GAME_ENABLE	0x08
+#define VIA_CR42_MIDI_IRQMASK   0x40
+#define VIA_CR42_MIDI_PNP	0x80
+
+#define VIA_CR44_SECOND_CODEC_SUPPORT	(1 << 6)
+#define VIA_CR44_AC_LINK_ACCESS		(1 << 7)
+
+#define VIA_CR48_FM_TRAP_TO_NMI		(1 << 2)
+
+/* controller base 0 register bitmasks */
+#define VIA_INT_DISABLE_MASK		(~(0x01|0x02))
+#define VIA_SGD_STOPPED			(1 << 2)
+#define VIA_SGD_PAUSED			(1 << 6)
+#define VIA_SGD_ACTIVE			(1 << 7)
+#define VIA_SGD_TERMINATE		(1 << 6)
+#define VIA_SGD_FLAG			(1 << 0)
+#define VIA_SGD_EOL			(1 << 1)
+#define VIA_SGD_START			(1 << 7)
+
+#define VIA_CR80_FIRST_CODEC		0
+#define VIA_CR80_SECOND_CODEC		(1 << 30)
+#define VIA_CR80_FIRST_CODEC_VALID	(1 << 25)
+#define VIA_CR80_VALID			(1 << 25)
+#define VIA_CR80_SECOND_CODEC_VALID	(1 << 27)
+#define VIA_CR80_BUSY			(1 << 24)
+#define VIA_CR83_BUSY			(1)
+#define VIA_CR83_FIRST_CODEC_VALID	(1 << 1)
+#define VIA_CR80_READ			(1 << 23)
+#define VIA_CR80_WRITE_MODE		0
+#define VIA_CR80_REG_IDX(idx)		((((idx) & 0xFF) >> 1) << 16)
+
+/* capabilities we announce */
+#ifdef VIA_SUPPORT_MMAP
+#define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \
+		     DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
+#else
+#define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \
+		     DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
+#endif
+
+/* scatter-gather DMA table entry, exactly as passed to hardware */
+struct via_sgd_table {
+	u32 addr;
+	u32 count;	/* includes additional VIA_xxx bits also */
+};
+
+#define VIA_EOL (1 << 31)
+#define VIA_FLAG (1 << 30)
+#define VIA_STOP (1 << 29)
+
+
+enum via_channel_states {
+	sgd_stopped = 0,
+	sgd_in_progress = 1,
+};
+
+
+struct via_buffer_pgtbl {
+	dma_addr_t handle;
+	void *cpuaddr;
+};
+
+
+struct via_channel {
+	atomic_t n_frags;
+	atomic_t hw_ptr;
+	wait_queue_head_t wait;
+
+	unsigned int sw_ptr;
+	unsigned int slop_len;
+	unsigned int n_irqs;
+	int bytes;
+
+	unsigned is_active : 1;
+	unsigned is_record : 1;
+	unsigned is_mapped : 1;
+	unsigned is_enabled : 1;
+	unsigned is_multi: 1;	/* 8233 6 channel */
+	u8 pcm_fmt;		/* VIA_PCM_FMT_xxx */
+	u8 channels;		/* Channel count */
+
+	unsigned rate;		/* sample rate */
+	unsigned int frag_size;
+	unsigned int frag_number;
+	
+	unsigned char intmask;
+
+	volatile struct via_sgd_table *sgtable;
+	dma_addr_t sgt_handle;
+
+	unsigned int page_number;
+	struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES];
+
+	long iobase;
+
+	const char *name;
+};
+
+
+/* data stored for each chip */
+struct via_info {
+	struct pci_dev *pdev;
+	long baseaddr;
+
+	struct ac97_codec *ac97;
+	spinlock_t ac97_lock;
+	spinlock_t lock;
+	int card_num;		/* unique card number, from 0 */
+
+	int dev_dsp;		/* /dev/dsp index from register_sound_dsp() */
+
+	unsigned rev_h : 1;
+	unsigned legacy: 1;	/* Has legacy ports */
+	unsigned intmask: 1;	/* Needs int bits */
+	unsigned sixchannel: 1;	/* 8233/35 with 6 channel support */
+	unsigned volume: 1;
+
+	int locked_rate : 1;
+	
+	int mixer_vol;		/* 8233/35 volume  - not yet implemented */
+
+	struct semaphore syscall_sem;
+	struct semaphore open_sem;
+
+	/* The 8233/8235 have 4 DX audio channels, two record and
+	   one six channel out. We bind ch_in to DX 1, ch_out to multichannel
+	   and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the
+	   moment */
+	   
+	struct via_channel ch_in;
+	struct via_channel ch_out;
+	struct via_channel ch_fm;
+
+#ifdef CONFIG_MIDI_VIA82CXXX
+        void *midi_devc;
+        struct address_info midi_info;
+#endif
+};
+
+
+/* number of cards, used for assigning unique numbers to cards */
+static unsigned via_num_cards;
+
+
+
+/****************************************************************
+ *
+ * prototypes
+ *
+ *
+ */
+
+static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
+static void __devexit via_remove_one (struct pci_dev *pdev);
+
+static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos);
+static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos);
+static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait);
+static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
+static int via_dsp_open (struct inode *inode, struct file *file);
+static int via_dsp_release(struct inode *inode, struct file *file);
+static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma);
+
+static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg);
+static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value);
+static u8 via_ac97_wait_idle (struct via_info *card);
+
+static void via_chan_free (struct via_info *card, struct via_channel *chan);
+static void via_chan_clear (struct via_info *card, struct via_channel *chan);
+static void via_chan_pcm_fmt (struct via_channel *chan, int reset);
+static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan);
+
+
+/****************************************************************
+ *
+ * Various data the driver needs
+ *
+ *
+ */
+
+
+static struct pci_device_id via_pci_tbl[] = {
+	{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci,via_pci_tbl);
+
+
+static struct pci_driver via_driver = {
+	.name		= VIA_MODULE_NAME,
+	.id_table	= via_pci_tbl,
+	.probe		= via_init_one,
+	.remove		= __devexit_p(via_remove_one),
+};
+
+
+/****************************************************************
+ *
+ * Low-level base 0 register read/write helpers
+ *
+ *
+ */
+
+/**
+ *	via_chan_stop - Terminate DMA on specified PCM channel
+ *	@iobase: PCI base address for SGD channel registers
+ *
+ *	Terminate scatter-gather DMA operation for given
+ *	channel (derived from @iobase), if DMA is active.
+ *
+ *	Note that @iobase is not the PCI base address,
+ *	but the PCI base address plus an offset to
+ *	one of three PCM channels supported by the chip.
+ *
+ */
+
+static inline void via_chan_stop (long iobase)
+{
+	if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE)
+		outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL);
+}
+
+
+/**
+ *	via_chan_status_clear - Clear status flags on specified DMA channel
+ *	@iobase: PCI base address for SGD channel registers
+ *
+ *	Clear any pending status flags for the given
+ *	DMA channel (derived from @iobase), if any
+ *	flags are asserted.
+ *
+ *	Note that @iobase is not the PCI base address,
+ *	but the PCI base address plus an offset to
+ *	one of three PCM channels supported by the chip.
+ *
+ */
+
+static inline void via_chan_status_clear (long iobase)
+{
+	u8 tmp = inb (iobase + VIA_PCM_STATUS);
+
+	if (tmp != 0)
+		outb (tmp, iobase + VIA_PCM_STATUS);
+}
+
+
+/**
+ *	sg_begin - Begin recording or playback on a PCM channel
+ *	@chan: Channel for which DMA operation shall begin
+ *
+ *	Start scatter-gather DMA for the given channel.
+ *
+ */
+
+static inline void sg_begin (struct via_channel *chan)
+{
+	DPRINTK("Start with intmask %d\n", chan->intmask);
+	DPRINTK("About to start from %d to %d\n", 
+		inl(chan->iobase + VIA_PCM_BLOCK_COUNT),
+		inb(chan->iobase + VIA_PCM_STOPRATE + 3));
+	outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL);
+	DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS));
+	DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL));
+}
+
+
+static int sg_active (long iobase)
+{
+	u8 tmp = inb (iobase + VIA_PCM_STATUS);
+	if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) {
+		printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n");
+		return 0;
+	}
+	if (tmp & VIA_SGD_ACTIVE)
+		return 1;
+	return 0;
+}
+
+static int via_sg_offset(struct via_channel *chan)
+{
+	return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF;
+}
+
+/****************************************************************
+ *
+ * Miscellaneous debris
+ *
+ *
+ */
+
+
+/**
+ *	via_syscall_down - down the card-specific syscell semaphore
+ *	@card: Private info for specified board
+ *	@nonblock: boolean, non-zero if O_NONBLOCK is set
+ *
+ *	Encapsulates standard method of acquiring the syscall sem.
+ *
+ *	Returns negative errno on error, or zero for success.
+ */
+
+static inline int via_syscall_down (struct via_info *card, int nonblock)
+{
+	/* Thomas Sailer:
+	 * EAGAIN is supposed to be used if IO is pending,
+	 * not if there is contention on some internal
+	 * synchronization primitive which should be
+	 * held only for a short time anyway
+	 */
+	nonblock = 0;
+
+	if (nonblock) {
+		if (down_trylock (&card->syscall_sem))
+			return -EAGAIN;
+	} else {
+		if (down_interruptible (&card->syscall_sem))
+			return -ERESTARTSYS;
+	}
+
+	return 0;
+}
+
+
+/**
+ *	via_stop_everything - Stop all audio operations
+ *	@card: Private info for specified board
+ *
+ *	Stops all DMA operations and interrupts, and clear
+ *	any pending status bits resulting from those operations.
+ */
+
+static void via_stop_everything (struct via_info *card)
+{
+	u8 tmp, new_tmp;
+
+	DPRINTK ("ENTER\n");
+
+	assert (card != NULL);
+
+	/*
+	 * terminate any existing operations on audio read/write channels
+	 */
+	via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
+	via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
+	via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
+	if(card->sixchannel)
+		via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
+
+	/*
+	 * clear any existing stops / flags (sanity check mainly)
+	 */
+	via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
+	via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
+	via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
+	if(card->sixchannel)
+		via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
+
+	/*
+	 * clear any enabled interrupt bits
+	 */
+	tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
+	new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
+	if (tmp != new_tmp)
+		outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
+
+	tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
+	new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
+	if (tmp != new_tmp)
+		outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
+
+	tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
+	new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
+	if (tmp != new_tmp)
+		outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
+
+	if(card->sixchannel)
+	{
+		tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
+		new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
+		if (tmp != new_tmp)
+			outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
+	}
+
+	udelay(10);
+
+	/*
+	 * clear any existing flags
+	 */
+	via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
+	via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
+	via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
+
+	DPRINTK ("EXIT\n");
+}
+
+
+/**
+ *	via_set_rate - Set PCM rate for given channel
+ *	@ac97: Pointer to generic codec info struct
+ *	@chan: Private info for specified channel
+ *	@rate: Desired PCM sample rate, in Khz
+ *
+ *	Sets the PCM sample rate for a channel.
+ *
+ *	Values for @rate are clamped to a range of 4000 Khz through 48000 Khz,
+ *	due to hardware constraints.
+ */
+
+static int via_set_rate (struct ac97_codec *ac97,
+			 struct via_channel *chan, unsigned rate)
+{
+	struct via_info *card = ac97->private_data;
+	int rate_reg;
+	u32 dacp;
+	u32 mast_vol, phone_vol, mono_vol, pcm_vol;
+	u32 mute_vol = 0x8000;	/* The mute volume? -- Seems to work! */
+
+	DPRINTK ("ENTER, rate = %d\n", rate);
+
+	if (chan->rate == rate)
+		goto out;
+	if (card->locked_rate) {
+		chan->rate = 48000;
+		goto out;
+	}
+
+	if (rate > 48000)		rate = 48000;
+	if (rate < 4000) 		rate = 4000;
+
+	rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE :
+			    AC97_PCM_FRONT_DAC_RATE;
+
+	/* Save current state */
+	dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL);
+	mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO);
+	mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO);
+	phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL);
+	pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL);
+	/* Mute - largely reduces popping */
+	via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol);
+	via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol);
+	via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol);
+       	via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol);
+	/* Power down the DAC */
+	via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200);
+
+        /* Set new rate */
+	via_ac97_write_reg (ac97, rate_reg, rate);
+
+	/* Power DAC back up */
+	via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp);
+	udelay (200); /* reduces popping */
+
+	/* Restore volumes */
+	via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol);
+	via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol);
+	via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol);
+	via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol);
+
+	/* the hardware might return a value different than what we
+	 * passed to it, so read the rate value back from hardware
+	 * to see what we came up with
+	 */
+	chan->rate = via_ac97_read_reg (ac97, rate_reg);
+
+	if (chan->rate == 0) {
+		card->locked_rate = 1;
+		chan->rate = 48000;
+		printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
+	}
+
+out:
+	DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate);
+	return chan->rate;
+}
+
+
+/****************************************************************
+ *
+ * Channel-specific operations
+ *
+ *
+ */
+
+
+/**
+ *	via_chan_init_defaults - Initialize a struct via_channel
+ *	@card: Private audio chip info
+ *	@chan: Channel to be initialized
+ *
+ *	Zero @chan, and then set all static defaults for the structure.
+ */
+
+static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan)
+{
+	memset (chan, 0, sizeof (*chan));
+
+	if(card->intmask)
+		chan->intmask = 0x23;	/* Turn on the IRQ bits */
+		
+	if (chan == &card->ch_out) {
+		chan->name = "PCM-OUT";
+		if(card->sixchannel)
+		{
+			chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN;
+			chan->is_multi = 1;
+			DPRINTK("Using multichannel for pcm out\n");
+		}
+		else
+			chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN;
+	} else if (chan == &card->ch_in) {
+		chan->name = "PCM-IN";
+		chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN;
+		chan->is_record = 1;
+	} else if (chan == &card->ch_fm) {
+		chan->name = "PCM-OUT-FM";
+		chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN;
+	} else {
+		BUG();
+	}
+
+	init_waitqueue_head (&chan->wait);
+
+	chan->pcm_fmt = VIA_PCM_FMT_MASK;
+	chan->is_enabled = 1;
+
+	chan->frag_number = 0;
+        chan->frag_size = 0;
+	atomic_set(&chan->n_frags, 0);
+	atomic_set (&chan->hw_ptr, 0);
+}
+
+/**
+ *      via_chan_init - Initialize PCM channel
+ *      @card: Private audio chip info
+ *      @chan: Channel to be initialized
+ *
+ *      Performs some of the preparations necessary to begin
+ *      using a PCM channel.
+ *
+ *      Currently the preparations consist of
+ *      setting the PCM channel to a known state.
+ */
+
+
+static void via_chan_init (struct via_info *card, struct via_channel *chan)
+{
+
+        DPRINTK ("ENTER\n");
+
+	/* bzero channel structure, and init members to defaults */
+        via_chan_init_defaults (card, chan);
+
+        /* stop any existing channel output */
+        via_chan_clear (card, chan);
+        via_chan_status_clear (chan->iobase);
+        via_chan_pcm_fmt (chan, 1);
+
+	DPRINTK ("EXIT\n");
+}
+
+/**
+ *	via_chan_buffer_init - Initialize PCM channel buffer
+ *	@card: Private audio chip info
+ *	@chan: Channel to be initialized
+ *
+ *	Performs some of the preparations necessary to begin
+ *	using a PCM channel.
+ *
+ *	Currently the preparations include allocating the
+ *	scatter-gather DMA table and buffers,
+ *	and passing the
+ *	address of the DMA table to the hardware.
+ *
+ *	Note that special care is taken when passing the
+ *	DMA table address to hardware, because it was found
+ *	during driver development that the hardware did not
+ *	always "take" the address.
+ */
+
+static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan)
+{
+	int page, offset;
+	int i;
+
+	DPRINTK ("ENTER\n");
+
+
+	chan->intmask = 0;
+	if(card->intmask)
+		chan->intmask = 0x23;	/* Turn on the IRQ bits */
+		
+	if (chan->sgtable != NULL) {
+		DPRINTK ("EXIT\n");
+		return 0;
+	}
+
+	/* alloc DMA-able memory for scatter-gather table */
+	chan->sgtable = pci_alloc_consistent (card->pdev,
+		(sizeof (struct via_sgd_table) * chan->frag_number),
+		&chan->sgt_handle);
+	if (!chan->sgtable) {
+		printk (KERN_ERR PFX "DMA table alloc fail, aborting\n");
+		DPRINTK ("EXIT\n");
+		return -ENOMEM;
+	}
+
+	memset ((void*)chan->sgtable, 0,
+		(sizeof (struct via_sgd_table) * chan->frag_number));
+
+	/* alloc DMA-able memory for scatter-gather buffers */
+
+	chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE +
+			    (((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0);
+
+	for (i = 0; i < chan->page_number; i++) {
+		chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE,
+					      &chan->pgtbl[i].handle);
+
+		if (!chan->pgtbl[i].cpuaddr) {
+			chan->page_number = i;
+			goto err_out_nomem;
+		}
+
+#ifndef VIA_NDEBUG
+                memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size);
+#endif
+
+#if 1
+                DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n",
+			i, (long)chan->pgtbl[i].handle,
+			virt_to_phys(chan->pgtbl[i].cpuaddr),
+			chan->pgtbl[i].cpuaddr);
+#endif
+	}
+
+	for (i = 0; i < chan->frag_number; i++) {
+
+		page = i / (PAGE_SIZE / chan->frag_size);
+		offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
+
+		chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
+		chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset);
+
+#if 1
+		DPRINTK ("dmabuf #%d (32(h)=%lx)\n",
+			 i,
+			 (long)chan->sgtable[i].addr);
+#endif
+	}
+
+	/* overwrite the last buffer information */
+	chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
+
+	/* set location of DMA-able scatter-gather info table */
+	DPRINTK ("outl (0x%X, 0x%04lX)\n",
+		chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
+
+	via_ac97_wait_idle (card);
+	outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
+	udelay (20);
+	via_ac97_wait_idle (card);
+	/* load no rate adaption, stereo 16bit, set up ring slots */
+	if(card->sixchannel)
+	{
+		if(!chan->is_multi)
+		{
+			outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE);
+			udelay (20);
+			via_ac97_wait_idle (card);
+		}
+	}
+
+	DPRINTK ("inl (0x%lX) = %x\n",
+		chan->iobase + VIA_PCM_TABLE_ADDR,
+		inl(chan->iobase + VIA_PCM_TABLE_ADDR));
+
+	DPRINTK ("EXIT\n");
+	return 0;
+
+err_out_nomem:
+	printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n");
+	via_chan_buffer_free (card, chan);
+	DPRINTK ("EXIT\n");
+	return -ENOMEM;
+}
+
+
+/**
+ *	via_chan_free - Release a PCM channel
+ *	@card: Private audio chip info
+ *	@chan: Channel to be released
+ *
+ *	Performs all the functions necessary to clean up
+ *	an initialized channel.
+ *
+ *	Currently these functions include disabled any
+ *	active DMA operations, setting the PCM channel
+ *	back to a known state, and releasing any allocated
+ *	sound buffers.
+ */
+
+static void via_chan_free (struct via_info *card, struct via_channel *chan)
+{
+	DPRINTK ("ENTER\n");
+
+	spin_lock_irq (&card->lock);
+
+	/* stop any existing channel output */
+	via_chan_status_clear (chan->iobase);
+	via_chan_stop (chan->iobase);
+	via_chan_status_clear (chan->iobase);
+
+	spin_unlock_irq (&card->lock);
+
+	synchronize_irq(card->pdev->irq);
+
+	DPRINTK ("EXIT\n");
+}
+
+static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan)
+{
+	int i;
+
+        DPRINTK ("ENTER\n");
+
+	/* zero location of DMA-able scatter-gather info table */
+	via_ac97_wait_idle(card);
+	outl (0, chan->iobase + VIA_PCM_TABLE_ADDR);
+
+	for (i = 0; i < chan->page_number; i++)
+		if (chan->pgtbl[i].cpuaddr) {
+			pci_free_consistent (card->pdev, PAGE_SIZE,
+					     chan->pgtbl[i].cpuaddr,
+					     chan->pgtbl[i].handle);
+			chan->pgtbl[i].cpuaddr = NULL;
+			chan->pgtbl[i].handle = 0;
+		}
+
+	chan->page_number = 0;
+
+	if (chan->sgtable) {
+		pci_free_consistent (card->pdev,
+			(sizeof (struct via_sgd_table) * chan->frag_number),
+			(void*)chan->sgtable, chan->sgt_handle);
+		chan->sgtable = NULL;
+	}
+
+	DPRINTK ("EXIT\n");
+}
+
+
+/**
+ *	via_chan_pcm_fmt - Update PCM channel settings
+ *	@chan: Channel to be updated
+ *	@reset: Boolean.  If non-zero, channel will be reset
+ *		to 8-bit mono mode.
+ *
+ *	Stores the settings of the current PCM format,
+ *	8-bit or 16-bit, and mono/stereo, into the
+ *	hardware settings for the specified channel.
+ *	If @reset is non-zero, the channel is reset
+ *	to 8-bit mono mode.  Otherwise, the channel
+ *	is set to the values stored in the channel
+ *	information struct @chan.
+ */
+
+static void via_chan_pcm_fmt (struct via_channel *chan, int reset)
+{
+	DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
+		 chan->pcm_fmt, reset ? "yes" : "no");
+
+	assert (chan != NULL);
+
+	if (reset)
+	{
+		/* reset to 8-bit mono mode */
+		chan->pcm_fmt = 0;
+		chan->channels = 1;
+	}
+
+	/* enable interrupts on FLAG and EOL */
+	chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
+
+	/* if we are recording, enable recording fifo bit */
+	if (chan->is_record)
+		chan->pcm_fmt |= VIA_PCM_REC_FIFO;
+	/* set interrupt select bits where applicable (PCM in & out channels) */
+	if (!chan->is_record)
+		chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
+	
+	DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi);
+	
+	if(chan->intmask)
+	{
+		u32 m;
+
+		/*
+		 *	Channel 0x4 is up to 6 x 16bit and has to be
+		 *	programmed differently 
+		 */
+		 		
+		if(chan->is_multi)
+		{
+			u8 c = 0;
+			
+			/*
+			 *	Load the type bit for num channels
+			 *	and 8/16bit
+			 */
+			 
+			if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
+				c = 1 << 7;
+			if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
+				c |= (2<<4);
+			else
+				c |= (1<<4);
+				
+			outb(c, chan->iobase + VIA_PCM_TYPE);
+			
+			/*
+			 *	Set the channel steering
+			 *	Mono
+			 *		Channel 0 to slot 3
+			 *		Channel 0 to slot 4
+			 *	Stereo
+			 *		Channel 0 to slot 3
+			 *		Channel 1 to slot 4
+			 */
+			 
+			switch(chan->channels)
+			{
+				case 1:
+					outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE);
+					break;
+				case 2:
+					outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE);
+					break;
+				case 4:
+					outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE);
+					break;
+				case 6:
+					outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE);
+					break;
+			}				
+		}
+		else
+		{
+			/*
+			 *	New style, turn off channel volume
+			 *	control, set bits in the right register
+			 */	
+			outb(0x0, chan->iobase + VIA_PCM_LEFTVOL);
+			outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL);
+
+			m = inl(chan->iobase + VIA_PCM_STOPRATE);
+			m &= ~(3<<20);
+			if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
+				m |= (1 << 20);
+			if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
+				m |= (1 << 21);
+			outl(m, chan->iobase + VIA_PCM_STOPRATE);
+		}		
+	}
+	else
+		outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE);
+
+
+	DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
+		 chan->pcm_fmt,
+		 inb (chan->iobase + VIA_PCM_TYPE));
+}
+
+
+/**
+ *	via_chan_clear - Stop DMA channel operation, and reset pointers
+ *	@card: the chip to accessed
+ *	@chan: Channel to be cleared
+ *
+ *	Call via_chan_stop to halt DMA operations, and then resets
+ *	all software pointers which track DMA operation.
+ */
+
+static void via_chan_clear (struct via_info *card, struct via_channel *chan)
+{
+	DPRINTK ("ENTER\n");
+	via_chan_stop (chan->iobase);
+	via_chan_buffer_free(card, chan);
+	chan->is_active = 0;
+	chan->is_mapped = 0;
+	chan->is_enabled = 1;
+	chan->slop_len = 0;
+	chan->sw_ptr = 0;
+	chan->n_irqs = 0;
+	atomic_set (&chan->hw_ptr, 0);
+	DPRINTK ("EXIT\n");
+}
+
+
+/**
+ *	via_chan_set_speed - Set PCM sample rate for given channel
+ *	@card: Private info for specified board
+ *	@chan: Channel whose sample rate will be adjusted
+ *	@val: New sample rate, in Khz
+ *
+ *	Helper function for the %SNDCTL_DSP_SPEED ioctl.  OSS semantics
+ *	demand that all audio operations halt (if they are not already
+ *	halted) when the %SNDCTL_DSP_SPEED is given.
+ *
+ *	This function halts all audio operations for the given channel
+ *	@chan, and then calls via_set_rate to set the audio hardware
+ *	to the new rate.
+ */
+
+static int via_chan_set_speed (struct via_info *card,
+			       struct via_channel *chan, int val)
+{
+	DPRINTK ("ENTER, requested rate = %d\n", val);
+
+	via_chan_clear (card, chan);
+
+	val = via_set_rate (card->ac97, chan, val);
+
+	DPRINTK ("EXIT, returning %d\n", val);
+	return val;
+}
+
+
+/**
+ *	via_chan_set_fmt - Set PCM sample size for given channel
+ *	@card: Private info for specified board
+ *	@chan: Channel whose sample size will be adjusted
+ *	@val: New sample size, use the %AFMT_xxx constants
+ *
+ *	Helper function for the %SNDCTL_DSP_SETFMT ioctl.  OSS semantics
+ *	demand that all audio operations halt (if they are not already
+ *	halted) when the %SNDCTL_DSP_SETFMT is given.
+ *