Linux-2.6.12-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!
diff --git a/sound/oss/via82cxxx_audio.c b/sound/oss/via82cxxx_audio.c
new file mode 100644
index 0000000..b387e1e5
--- /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.
+ *
+ * This function halts all audio operations for the given channel
+ * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
+ * to the new sample size, either 8-bit or 16-bit.
+ */
+
+static int via_chan_set_fmt (struct via_info *card,
+ struct via_channel *chan, int val)
+{
+ DPRINTK ("ENTER, val=%s\n",
+ val == AFMT_U8 ? "AFMT_U8" :
+ val == AFMT_S16_LE ? "AFMT_S16_LE" :
+ "unknown");
+
+ via_chan_clear (card, chan);
+
+ assert (val != AFMT_QUERY); /* this case is handled elsewhere */
+
+ switch (val) {
+ case AFMT_S16_LE:
+ if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) {
+ chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
+ via_chan_pcm_fmt (chan, 0);
+ }
+ break;
+
+ case AFMT_U8:
+ if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) {
+ chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
+ via_chan_pcm_fmt (chan, 0);
+ }
+ break;
+
+ default:
+ DPRINTK ("unknown AFMT: 0x%X\n", val);
+ val = AFMT_S16_LE;
+ }
+
+ DPRINTK ("EXIT\n");
+ return val;
+}
+
+
+/**
+ * via_chan_set_stereo - Enable or disable stereo for a DMA channel
+ * @card: Private info for specified board
+ * @chan: Channel whose stereo setting will be adjusted
+ * @val: New sample size, use the %AFMT_xxx constants
+ *
+ * Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics
+ * demand that all audio operations halt (if they are not already
+ * halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given.
+ *
+ * This function halts all audio operations for the given channel
+ * @chan, and then calls via_chan_pcm_fmt to set the audio hardware
+ * to enable or disable stereo.
+ */
+
+static int via_chan_set_stereo (struct via_info *card,
+ struct via_channel *chan, int val)
+{
+ DPRINTK ("ENTER, channels = %d\n", val);
+
+ via_chan_clear (card, chan);
+
+ switch (val) {
+
+ /* mono */
+ case 1:
+ chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
+ chan->channels = 1;
+ via_chan_pcm_fmt (chan, 0);
+ break;
+
+ /* stereo */
+ case 2:
+ chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
+ chan->channels = 2;
+ via_chan_pcm_fmt (chan, 0);
+ break;
+
+ case 4:
+ case 6:
+ if(chan->is_multi)
+ {
+ chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
+ chan->channels = val;
+ break;
+ }
+ /* unknown */
+ default:
+ val = -EINVAL;
+ break;
+ }
+
+ DPRINTK ("EXIT, returning %d\n", val);
+ return val;
+}
+
+static int via_chan_set_buffering (struct via_info *card,
+ struct via_channel *chan, int val)
+{
+ int shift;
+
+ DPRINTK ("ENTER\n");
+
+ /* in both cases the buffer cannot be changed */
+ if (chan->is_active || chan->is_mapped) {
+ DPRINTK ("EXIT\n");
+ return -EINVAL;
+ }
+
+ /* called outside SETFRAGMENT */
+ /* set defaults or do nothing */
+ if (val < 0) {
+
+ if (chan->frag_size && chan->frag_number)
+ goto out;
+
+ DPRINTK ("\n");
+
+ chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * chan->channels
+ * ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1;
+
+ shift = 0;
+ while (chan->frag_size) {
+ chan->frag_size >>= 1;
+ shift++;
+ }
+ chan->frag_size = 1 << shift;
+
+ chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME);
+
+ DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number);
+ } else {
+ chan->frag_size = 1 << (val & 0xFFFF);
+ chan->frag_number = (val >> 16) & 0xFFFF;
+
+ DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number);
+ }
+
+ /* quake3 wants frag_number to be a power of two */
+ shift = 0;
+ while (chan->frag_number) {
+ chan->frag_number >>= 1;
+ shift++;
+ }
+ chan->frag_number = 1 << shift;
+
+ if (chan->frag_size > VIA_MAX_FRAG_SIZE)
+ chan->frag_size = VIA_MAX_FRAG_SIZE;
+ else if (chan->frag_size < VIA_MIN_FRAG_SIZE)
+ chan->frag_size = VIA_MIN_FRAG_SIZE;
+
+ if (chan->frag_number < VIA_MIN_FRAG_NUMBER)
+ chan->frag_number = VIA_MIN_FRAG_NUMBER;
+ if (chan->frag_number > VIA_MAX_FRAG_NUMBER)
+ chan->frag_number = VIA_MAX_FRAG_NUMBER;
+
+ if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES)
+ chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size;
+
+out:
+ if (chan->is_record)
+ atomic_set (&chan->n_frags, 0);
+ else
+ atomic_set (&chan->n_frags, chan->frag_number);
+
+ DPRINTK ("EXIT\n");
+
+ return 0;
+}
+
+#ifdef VIA_CHAN_DUMP_BUFS
+/**
+ * via_chan_dump_bufs - Display DMA table contents
+ * @chan: Channel whose DMA table will be displayed
+ *
+ * Debugging function which displays the contents of the
+ * scatter-gather DMA table for the given channel @chan.
+ */
+
+static void via_chan_dump_bufs (struct via_channel *chan)
+{
+ int i;
+
+ for (i = 0; i < chan->frag_number; i++) {
+ DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n",
+ i, chan->sgtable[i].addr,
+ chan->sgtable[i].count & 0x00FFFFFF,
+ chan->sgtable[i].count & VIA_FLAG ? 1 : 0,
+ chan->sgtable[i].count & VIA_EOL ? 1 : 0);
+ }
+ DPRINTK ("buf_in_use = %d, nextbuf = %d\n",
+ atomic_read (&chan->buf_in_use),
+ atomic_read (&chan->sw_ptr));
+}
+#endif /* VIA_CHAN_DUMP_BUFS */
+
+
+/**
+ * via_chan_flush_frag - Flush partially-full playback buffer to hardware
+ * @chan: Channel whose DMA table will be flushed
+ *
+ * Flushes partially-full playback buffer to hardware.
+ */
+
+static void via_chan_flush_frag (struct via_channel *chan)
+{
+ DPRINTK ("ENTER\n");
+
+ assert (chan->slop_len > 0);
+
+ if (chan->sw_ptr == (chan->frag_number - 1))
+ chan->sw_ptr = 0;
+ else
+ chan->sw_ptr++;
+
+ chan->slop_len = 0;
+
+ assert (atomic_read (&chan->n_frags) > 0);
+ atomic_dec (&chan->n_frags);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+
+/**
+ * via_chan_maybe_start - Initiate audio hardware DMA operation
+ * @chan: Channel whose DMA is to be started
+ *
+ * Initiate DMA operation, if the DMA engine for the given
+ * channel @chan is not already active.
+ */
+
+static inline void via_chan_maybe_start (struct via_channel *chan)
+{
+ assert (chan->is_active == sg_active(chan->iobase));
+
+ DPRINTK ("MAYBE START %s\n", chan->name);
+ if (!chan->is_active && chan->is_enabled) {
+ chan->is_active = 1;
+ sg_begin (chan);
+ DPRINTK ("starting channel %s\n", chan->name);
+ }
+}
+
+
+/****************************************************************
+ *
+ * Interface to ac97-codec module
+ *
+ *
+ */
+
+/**
+ * via_ac97_wait_idle - Wait until AC97 codec is not busy
+ * @card: Private info for specified board
+ *
+ * Sleep until the AC97 codec is no longer busy.
+ * Returns the final value read from the SGD
+ * register being polled.
+ */
+
+static u8 via_ac97_wait_idle (struct via_info *card)
+{
+ u8 tmp8;
+ int counter = VIA_COUNTER_LIMIT;
+
+ DPRINTK ("ENTER/EXIT\n");
+
+ assert (card != NULL);
+ assert (card->pdev != NULL);
+
+ do {
+ udelay (15);
+
+ tmp8 = inb (card->baseaddr + 0x83);
+ } while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
+
+ if (tmp8 & VIA_CR83_BUSY)
+ printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n");
+ return tmp8;
+}
+
+
+/**
+ * via_ac97_read_reg - Read AC97 standard register
+ * @codec: Pointer to generic AC97 codec info
+ * @reg: Index of AC97 register to be read
+ *
+ * Read the value of a single AC97 codec register,
+ * as defined by the Intel AC97 specification.
+ *
+ * Defines the standard AC97 read-register operation
+ * required by the kernel's ac97_codec interface.
+ *
+ * Returns the 16-bit value stored in the specified
+ * register.
+ */
+
+static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg)
+{
+ unsigned long data;
+ struct via_info *card;
+ int counter;
+
+ DPRINTK ("ENTER\n");
+
+ assert (codec != NULL);
+ assert (codec->private_data != NULL);
+
+ card = codec->private_data;
+
+ spin_lock(&card->ac97_lock);
+
+ /* Every time we write to register 80 we cause a transaction.
+ The only safe way to clear the valid bit is to write it at
+ the same time as the command */
+ data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID;
+
+ outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
+ udelay (20);
+
+ for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
+ udelay (1);
+ if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) &
+ (VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID))
+ goto out;
+ }
+
+ printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data);
+ goto err_out;
+
+out:
+ /* Once the valid bit has become set, we must wait a complete AC97
+ frame before the data has settled. */
+ udelay(25);
+ data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL);
+
+ outb (0x02, card->baseaddr + 0x83);
+
+ if (((data & 0x007F0000) >> 16) == reg) {
+ DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n",
+ data, data & 0x0000FFFF);
+ spin_unlock(&card->ac97_lock);
+ return data & 0x0000FFFF;
+ }
+
+ printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n",
+ reg, ((data & 0x007F0000) >> 16));
+
+err_out:
+ spin_unlock(&card->ac97_lock);
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+
+/**
+ * via_ac97_write_reg - Write AC97 standard register
+ * @codec: Pointer to generic AC97 codec info
+ * @reg: Index of AC97 register to be written
+ * @value: Value to be written to AC97 register
+ *
+ * Write the value of a single AC97 codec register,
+ * as defined by the Intel AC97 specification.
+ *
+ * Defines the standard AC97 write-register operation
+ * required by the kernel's ac97_codec interface.
+ */
+
+static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value)
+{
+ u32 data;
+ struct via_info *card;
+ int counter;
+
+ DPRINTK ("ENTER\n");
+
+ assert (codec != NULL);
+ assert (codec->private_data != NULL);
+
+ card = codec->private_data;
+
+ spin_lock(&card->ac97_lock);
+
+ data = (reg << 16) + value;
+ outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
+ udelay (10);
+
+ for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
+ if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
+ goto out;
+
+ udelay (15);
+ }
+
+ printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value);
+
+out:
+ spin_unlock(&card->ac97_lock);
+ DPRINTK ("EXIT\n");
+}
+
+
+static int via_mixer_open (struct inode *inode, struct file *file)
+{
+ int minor = iminor(inode);
+ struct via_info *card;
+ struct pci_dev *pdev = NULL;
+ struct pci_driver *drvr;
+
+ DPRINTK ("ENTER\n");
+
+ while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
+ drvr = pci_dev_driver (pdev);
+ if (drvr == &via_driver) {
+ assert (pci_get_drvdata (pdev) != NULL);
+
+ card = pci_get_drvdata (pdev);
+ if (card->ac97->dev_mixer == minor)
+ goto match;
+ }
+ }
+
+ DPRINTK ("EXIT, returning -ENODEV\n");
+ return -ENODEV;
+
+match:
+ file->private_data = card->ac97;
+
+ DPRINTK ("EXIT, returning 0\n");
+ return nonseekable_open(inode, file);
+}
+
+static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct ac97_codec *codec = file->private_data;
+ struct via_info *card;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+ int rc;
+
+ DPRINTK ("ENTER\n");
+
+ assert (codec != NULL);
+ card = codec->private_data;
+ assert (card != NULL);
+
+ rc = via_syscall_down (card, nonblock);
+ if (rc) goto out;
+
+#if 0
+ /*
+ * Intercept volume control on 8233 and 8235
+ */
+ if(card->volume)
+ {
+ switch(cmd)
+ {
+ case SOUND_MIXER_READ_VOLUME:
+ return card->mixer_vol;
+ case SOUND_MIXER_WRITE_VOLUME:
+ {
+ int v;
+ if(get_user(v, (int *)arg))
+ {
+ rc = -EFAULT;
+ goto out;
+ }
+ card->mixer_vol = v;
+ }
+ }
+ }
+#endif
+ rc = codec->mixer_ioctl(codec, cmd, arg);
+
+ up (&card->syscall_sem);
+
+out:
+ DPRINTK ("EXIT, returning %d\n", rc);
+ return rc;
+}
+
+
+static struct file_operations via_mixer_fops = {
+ .owner = THIS_MODULE,
+ .open = via_mixer_open,
+ .llseek = no_llseek,
+ .ioctl = via_mixer_ioctl,
+};
+
+
+static int __devinit via_ac97_reset (struct via_info *card)
+{
+ struct pci_dev *pdev = card->pdev;
+ u8 tmp8;
+ u16 tmp16;
+
+ DPRINTK ("ENTER\n");
+
+ assert (pdev != NULL);
+
+#ifndef NDEBUG
+ {
+ u8 r40,r41,r42,r43,r44,r48;
+ pci_read_config_byte (card->pdev, 0x40, &r40);
+ pci_read_config_byte (card->pdev, 0x41, &r41);
+ pci_read_config_byte (card->pdev, 0x42, &r42);
+ pci_read_config_byte (card->pdev, 0x43, &r43);
+ pci_read_config_byte (card->pdev, 0x44, &r44);
+ pci_read_config_byte (card->pdev, 0x48, &r48);
+ DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
+ r40,r41,r42,r43,r44,r48);
+
+ spin_lock_irq (&card->lock);
+ DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
+ inb (card->baseaddr + 0x00),
+ inb (card->baseaddr + 0x01),
+ inb (card->baseaddr + 0x02),
+ inl (card->baseaddr + 0x04),
+ inl (card->baseaddr + 0x0C),
+ inl (card->baseaddr + 0x80),
+ inl (card->baseaddr + 0x84));
+ spin_unlock_irq (&card->lock);
+
+ }
+#endif
+
+ /*
+ * Reset AC97 controller: enable, disable, enable,
+ * pausing after each command for good luck. Only
+ * do this if the codec is not ready, because it causes
+ * loud pops and such due to such a hard codec reset.
+ */
+ pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
+ if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
+ VIA_CR41_AC97_ENABLE |
+ VIA_CR41_AC97_RESET |
+ VIA_CR41_AC97_WAKEUP);
+ udelay (100);
+
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
+ udelay (100);
+
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
+ VIA_CR41_AC97_ENABLE |
+ VIA_CR41_PCM_ENABLE |
+ VIA_CR41_VRA | VIA_CR41_AC97_RESET);
+ udelay (100);
+ }
+
+ /* Make sure VRA is enabled, in case we didn't do a
+ * complete codec reset, above
+ */
+ pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
+ if (((tmp8 & VIA_CR41_VRA) == 0) ||
+ ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
+ ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
+ ((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
+ VIA_CR41_AC97_ENABLE |
+ VIA_CR41_PCM_ENABLE |
+ VIA_CR41_VRA | VIA_CR41_AC97_RESET);
+ udelay (100);
+ }
+
+ if(card->legacy)
+ {
+#if 0 /* this breaks on K7M */
+ /* disable legacy stuff */
+ pci_write_config_byte (pdev, 0x42, 0x00);
+ udelay(10);
+#endif
+
+ /* route FM trap to IRQ, disable FM trap */
+ pci_write_config_byte (pdev, 0x48, 0x05);
+ udelay(10);
+ }
+
+ /* disable all codec GPI interrupts */
+ outl (0, pci_resource_start (pdev, 0) + 0x8C);
+
+ /* WARNING: this line is magic. Remove this
+ * and things break. */
+ /* enable variable rate */
+ tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
+ if ((tmp16 & 1) == 0)
+ via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+
+static void via_ac97_codec_wait (struct ac97_codec *codec)
+{
+ assert (codec->private_data != NULL);
+ via_ac97_wait_idle (codec->private_data);
+}
+
+
+static int __devinit via_ac97_init (struct via_info *card)
+{
+ int rc;
+ u16 tmp16;
+
+ DPRINTK ("ENTER\n");
+
+ assert (card != NULL);
+
+ card->ac97 = ac97_alloc_codec();
+ if(card->ac97 == NULL)
+ return -ENOMEM;
+
+ card->ac97->private_data = card;
+ card->ac97->codec_read = via_ac97_read_reg;
+ card->ac97->codec_write = via_ac97_write_reg;
+ card->ac97->codec_wait = via_ac97_codec_wait;
+
+ card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
+ if (card->ac97->dev_mixer < 0) {
+ printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
+ DPRINTK ("EXIT, returning -EIO\n");
+ ac97_release_codec(card->ac97);
+ return -EIO;
+ }
+
+ rc = via_ac97_reset (card);
+ if (rc) {
+ printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
+ goto err_out;
+ }
+
+ mdelay(10);
+
+ if (ac97_probe_codec (card->ac97) == 0) {
+ printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
+ rc = -EIO;
+ goto err_out;
+ }
+
+ /* enable variable rate */
+ tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
+ via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
+
+ /*
+ * If we cannot enable VRA, we have a locked-rate codec.
+ * We try again to enable VRA before assuming so, however.
+ */
+ tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
+ if ((tmp16 & 1) == 0) {
+ via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
+ tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
+ if ((tmp16 & 1) == 0) {
+ card->locked_rate = 1;
+ printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
+ }
+ }
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+
+err_out:
+ unregister_sound_mixer (card->ac97->dev_mixer);
+ DPRINTK ("EXIT, returning %d\n", rc);
+ ac97_release_codec(card->ac97);
+ return rc;
+}
+
+
+static void via_ac97_cleanup (struct via_info *card)
+{
+ DPRINTK ("ENTER\n");
+
+ assert (card != NULL);
+ assert (card->ac97->dev_mixer >= 0);
+
+ unregister_sound_mixer (card->ac97->dev_mixer);
+ ac97_release_codec(card->ac97);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+
+/****************************************************************
+ *
+ * Interrupt-related code
+ *
+ */
+
+/**
+ * via_intr_channel - handle an interrupt for a single channel
+ * @card: unused
+ * @chan: handle interrupt for this channel
+ *
+ * This is the "meat" of the interrupt handler,
+ * containing the actions taken each time an interrupt
+ * occurs. All communication and coordination with
+ * userspace takes place here.
+ *
+ * Locking: inside card->lock
+ */
+
+static void via_intr_channel (struct via_info *card, struct via_channel *chan)
+{
+ u8 status;
+ int n;
+
+ /* check pertinent bits of status register for action bits */
+ status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
+ if (!status)
+ return;
+
+ /* acknowledge any flagged bits ASAP */
+ outb (status, chan->iobase);
+
+ if (!chan->sgtable) /* XXX: temporary solution */
+ return;
+
+ /* grab current h/w ptr value */
+ n = atomic_read (&chan->hw_ptr);
+
+ /* sanity check: make sure our h/w ptr doesn't have a weird value */
+ assert (n >= 0);
+ assert (n < chan->frag_number);
+
+
+ /* reset SGD data structure in memory to reflect a full buffer,
+ * and advance the h/w ptr, wrapping around to zero if needed
+ */
+ if (n == (chan->frag_number - 1)) {
+ chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
+ atomic_set (&chan->hw_ptr, 0);
+ } else {
+ chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
+ atomic_inc (&chan->hw_ptr);
+ }
+
+ /* accounting crap for SNDCTL_DSP_GETxPTR */
+ chan->n_irqs++;
+ chan->bytes += chan->frag_size;
+ /* FIXME - signed overflow is undefined */
+ if (chan->bytes < 0) /* handle overflow of 31-bit value */
+ chan->bytes = chan->frag_size;
+ /* all following checks only occur when not in mmap(2) mode */
+ if (!chan->is_mapped)
+ {
+ /* If we are recording, then n_frags represents the number
+ * of fragments waiting to be handled by userspace.
+ * If we are playback, then n_frags represents the number
+ * of fragments remaining to be filled by userspace.
+ * We increment here. If we reach max number of fragments,
+ * this indicates an underrun/overrun. For this case under OSS,
+ * we stop the record/playback process.
+ */
+ if (atomic_read (&chan->n_frags) < chan->frag_number)
+ atomic_inc (&chan->n_frags);
+ assert (atomic_read (&chan->n_frags) <= chan->frag_number);
+ if (atomic_read (&chan->n_frags) == chan->frag_number) {
+ chan->is_active = 0;
+ via_chan_stop (chan->iobase);
+ }
+ }
+ /* wake up anyone listening to see when interrupts occur */
+ wake_up_all (&chan->wait);
+
+ DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
+ chan->name, status, (long) inl (chan->iobase + 0x04),
+ atomic_read (&chan->hw_ptr));
+
+ DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
+ atomic_read (&chan->n_frags), missed);
+}
+
+
+static irqreturn_t via_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct via_info *card = dev_id;
+ u32 status32;
+
+ /* to minimize interrupt sharing costs, we use the SGD status
+ * shadow register to check the status of all inputs and
+ * outputs with a single 32-bit bus read. If no interrupt
+ * conditions are flagged, we exit immediately
+ */
+ status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
+ if (!(status32 & VIA_INTR_MASK))
+ {
+#ifdef CONFIG_MIDI_VIA82CXXX
+ if (card->midi_devc)
+ uart401intr(irq, card->midi_devc, regs);
+#endif
+ return IRQ_HANDLED;
+ }
+ DPRINTK ("intr, status32 == 0x%08X\n", status32);
+
+ /* synchronize interrupt handling under SMP. this spinlock
+ * goes away completely on UP
+ */
+ spin_lock (&card->lock);
+
+ if (status32 & VIA_INTR_OUT)
+ via_intr_channel (card, &card->ch_out);
+ if (status32 & VIA_INTR_IN)
+ via_intr_channel (card, &card->ch_in);
+ if (status32 & VIA_INTR_FM)
+ via_intr_channel (card, &card->ch_fm);
+
+ spin_unlock (&card->lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t via_new_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct via_info *card = dev_id;
+ u32 status32;
+
+ /* to minimize interrupt sharing costs, we use the SGD status
+ * shadow register to check the status of all inputs and
+ * outputs with a single 32-bit bus read. If no interrupt
+ * conditions are flagged, we exit immediately
+ */
+ status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
+ if (!(status32 & VIA_NEW_INTR_MASK))
+ return IRQ_NONE;
+ /*
+ * goes away completely on UP
+ */
+ spin_lock (&card->lock);
+
+ via_intr_channel (card, &card->ch_out);
+ via_intr_channel (card, &card->ch_in);
+ via_intr_channel (card, &card->ch_fm);
+
+ spin_unlock (&card->lock);
+ return IRQ_HANDLED;
+}
+
+
+/**
+ * via_interrupt_init - Initialize interrupt handling
+ * @card: Private info for specified board
+ *
+ * Obtain and reserve IRQ for using in handling audio events.
+ * Also, disable any IRQ-generating resources, to make sure
+ * we don't get interrupts before we want them.
+ */
+
+static int via_interrupt_init (struct via_info *card)
+{
+ u8 tmp8;
+
+ DPRINTK ("ENTER\n");
+
+ assert (card != NULL);
+ assert (card->pdev != NULL);
+
+ /* check for sane IRQ number. can this ever happen? */
+ if (card->pdev->irq < 2) {
+ printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
+ card->pdev->irq);
+ DPRINTK ("EXIT, returning -EIO\n");
+ return -EIO;
+ }
+
+ /* VIA requires this is done */
+ pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
+
+ if(card->legacy)
+ {
+ /* make sure FM irq is not routed to us */
+ pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
+ if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
+ tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
+ pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
+ }
+ if (request_irq (card->pdev->irq, via_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
+ printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
+ card->pdev->irq);
+ DPRINTK ("EXIT, returning -EBUSY\n");
+ return -EBUSY;
+ }
+ }
+ else
+ {
+ if (request_irq (card->pdev->irq, via_new_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
+ printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
+ card->pdev->irq);
+ DPRINTK ("EXIT, returning -EBUSY\n");
+ return -EBUSY;
+ }
+ }
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+
+/****************************************************************
+ *
+ * OSS DSP device
+ *
+ */
+
+static struct file_operations via_dsp_fops = {
+ .owner = THIS_MODULE,
+ .open = via_dsp_open,
+ .release = via_dsp_release,
+ .read = via_dsp_read,
+ .write = via_dsp_write,
+ .poll = via_dsp_poll,
+ .llseek = no_llseek,
+ .ioctl = via_dsp_ioctl,
+ .mmap = via_dsp_mmap,
+};
+
+
+static int __devinit via_dsp_init (struct via_info *card)
+{
+ u8 tmp8;
+
+ DPRINTK ("ENTER\n");
+
+ assert (card != NULL);
+
+ if(card->legacy)
+ {
+ /* turn off legacy features, if not already */
+ pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
+ if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
+ tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
+ pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
+ }
+ }
+
+ via_stop_everything (card);
+
+ card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
+ if (card->dev_dsp < 0) {
+ DPRINTK ("EXIT, returning -ENODEV\n");
+ return -ENODEV;
+ }
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+
+static void via_dsp_cleanup (struct via_info *card)
+{
+ DPRINTK ("ENTER\n");
+
+ assert (card != NULL);
+ assert (card->dev_dsp >= 0);
+
+ via_stop_everything (card);
+
+ unregister_sound_dsp (card->dev_dsp);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+static struct page * via_mm_nopage (struct vm_area_struct * vma,
+ unsigned long address, int *type)
+{
+ struct via_info *card = vma->vm_private_data;
+ struct via_channel *chan = &card->ch_out;
+ struct page *dmapage;
+ unsigned long pgoff;
+ int rd, wr;
+
+ DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
+ vma->vm_start,
+ address - vma->vm_start,
+ (address - vma->vm_start) >> PAGE_SHIFT,
+ address);
+
+ if (address > vma->vm_end) {
+ DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
+ return NOPAGE_SIGBUS; /* Disallow mremap */
+ }
+ if (!card) {
+ DPRINTK ("EXIT, returning NOPAGE_OOM\n");
+ return NOPAGE_OOM; /* Nothing allocated */
+ }
+
+ pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
+ rd = card->ch_in.is_mapped;
+ wr = card->ch_out.is_mapped;
+
+#ifndef VIA_NDEBUG
+ {
+ unsigned long max_bufs = chan->frag_number;
+ if (rd && wr) max_bufs *= 2;
+ /* via_dsp_mmap() should ensure this */
+ assert (pgoff < max_bufs);
+ }
+#endif
+
+ /* if full-duplex (read+write) and we have two sets of bufs,
+ * then the playback buffers come first, sez soundcard.c */
+ if (pgoff >= chan->page_number) {
+ pgoff -= chan->page_number;
+ chan = &card->ch_in;
+ } else if (!wr)
+ chan = &card->ch_in;
+
+ assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
+
+ dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
+ DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
+ dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
+ get_page (dmapage);
+ if (type)
+ *type = VM_FAULT_MINOR;
+ return dmapage;
+}
+
+
+#ifndef VM_RESERVED
+static int via_mm_swapout (struct page *page, struct file *filp)
+{
+ return 0;
+}
+#endif /* VM_RESERVED */
+
+
+static struct vm_operations_struct via_mm_ops = {
+ .nopage = via_mm_nopage,
+
+#ifndef VM_RESERVED
+ .swapout = via_mm_swapout,
+#endif
+};
+
+
+static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct via_info *card;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+ int rc = -EINVAL, rd=0, wr=0;
+ unsigned long max_size, size, start, offset;
+
+ assert (file != NULL);
+ assert (vma != NULL);
+ card = file->private_data;
+ assert (card != NULL);
+
+ DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
+ vma->vm_start,
+ vma->vm_end - vma->vm_start,
+ vma->vm_pgoff);
+
+ max_size = 0;
+ if (vma->vm_flags & VM_READ) {
+ rd = 1;
+ via_chan_set_buffering(card, &card->ch_in, -1);
+ via_chan_buffer_init (card, &card->ch_in);
+ max_size += card->ch_in.page_number << PAGE_SHIFT;
+ }
+ if (vma->vm_flags & VM_WRITE) {
+ wr = 1;
+ via_chan_set_buffering(card, &card->ch_out, -1);
+ via_chan_buffer_init (card, &card->ch_out);
+ max_size += card->ch_out.page_number << PAGE_SHIFT;
+ }
+
+ start = vma->vm_start;
+ offset = (vma->vm_pgoff << PAGE_SHIFT);
+ size = vma->vm_end - vma->vm_start;
+
+ /* some basic size/offset sanity checks */
+ if (size > max_size)
+ goto out;
+ if (offset > max_size - size)
+ goto out;
+
+ rc = via_syscall_down (card, nonblock);
+ if (rc) goto out;
+
+ vma->vm_ops = &via_mm_ops;
+ vma->vm_private_data = card;
+
+#ifdef VM_RESERVED
+ vma->vm_flags |= VM_RESERVED;
+#endif
+
+ if (rd)
+ card->ch_in.is_mapped = 1;
+ if (wr)
+ card->ch_out.is_mapped = 1;
+
+ up (&card->syscall_sem);
+ rc = 0;
+
+out:
+ DPRINTK ("EXIT, returning %d\n", rc);
+ return rc;
+}
+
+
+static ssize_t via_dsp_do_read (struct via_info *card,
+ char __user *userbuf, size_t count,
+ int nonblock)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ const char __user *orig_userbuf = userbuf;
+ struct via_channel *chan = &card->ch_in;
+ size_t size;
+ int n, tmp;
+ ssize_t ret = 0;
+
+ /* if SGD has not yet been started, start it */
+ via_chan_maybe_start (chan);
+
+handle_one_block:
+ /* just to be a nice neighbor */
+ /* Thomas Sailer:
+ * But also to ourselves, release semaphore if we do so */
+ if (need_resched()) {
+ up(&card->syscall_sem);
+ schedule ();
+ ret = via_syscall_down (card, nonblock);
+ if (ret)
+ goto out;
+ }
+
+ /* grab current channel software pointer. In the case of
+ * recording, this is pointing to the next buffer that
+ * will receive data from the audio hardware.
+ */
+ n = chan->sw_ptr;
+
+ /* n_frags represents the number of fragments waiting
+ * to be copied to userland. sleep until at least
+ * one buffer has been read from the audio hardware.
+ */
+ add_wait_queue(&chan->wait, &wait);
+ for (;;) {
+ __set_current_state(TASK_INTERRUPTIBLE);
+ tmp = atomic_read (&chan->n_frags);
+ assert (tmp >= 0);
+ assert (tmp <= chan->frag_number);
+ if (tmp)
+ break;
+ if (nonblock || !chan->is_active) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ up(&card->syscall_sem);
+
+ DPRINTK ("Sleeping on block %d\n", n);
+ schedule();
+
+ ret = via_syscall_down (card, nonblock);
+ if (ret)
+ break;
+
+ if (signal_pending (current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&chan->wait, &wait);
+ if (ret)
+ goto out;
+
+ /* Now that we have a buffer we can read from, send
+ * as much as sample data possible to userspace.
+ */
+ while ((count > 0) && (chan->slop_len < chan->frag_size)) {
+ size_t slop_left = chan->frag_size - chan->slop_len;
+ void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
+ unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
+
+ size = (count < slop_left) ? count : slop_left;
+ if (copy_to_user (userbuf,
+ base + ofs + chan->slop_len,
+ size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ count -= size;
+ chan->slop_len += size;
+ userbuf += size;
+ }
+
+ /* If we didn't copy the buffer completely to userspace,
+ * stop now.
+ */
+ if (chan->slop_len < chan->frag_size)
+ goto out;
+
+ /*
+ * If we get to this point, we copied one buffer completely
+ * to userspace, give the buffer back to the hardware.
+ */
+
+ /* advance channel software pointer to point to
+ * the next buffer from which we will copy
+ */
+ if (chan->sw_ptr == (chan->frag_number - 1))
+ chan->sw_ptr = 0;
+ else
+ chan->sw_ptr++;
+
+ /* mark one less buffer waiting to be processed */
+ assert (atomic_read (&chan->n_frags) > 0);
+ atomic_dec (&chan->n_frags);
+
+ /* we are at a block boundary, there is no fragment data */
+ chan->slop_len = 0;
+
+ DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
+ n, chan->sw_ptr, atomic_read (&chan->n_frags));
+
+ DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
+ inb (card->baseaddr + 0x00),
+ inb (card->baseaddr + 0x01),
+ inb (card->baseaddr + 0x02),
+ inl (card->baseaddr + 0x04),
+ inl (card->baseaddr + 0x0C),
+ inl (card->baseaddr + 0x80),
+ inl (card->baseaddr + 0x84));
+
+ if (count > 0)
+ goto handle_one_block;
+
+out:
+ return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
+}
+
+
+static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
+{
+ struct via_info *card;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+ int rc;
+
+ DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
+ file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
+
+ assert (file != NULL);
+ card = file->private_data;
+ assert (card != NULL);
+
+ rc = via_syscall_down (card, nonblock);
+ if (rc) goto out;
+
+ if (card->ch_in.is_mapped) {
+ rc = -ENXIO;
+ goto out_up;
+ }
+
+ via_chan_set_buffering(card, &card->ch_in, -1);
+ rc = via_chan_buffer_init (card, &card->ch_in);
+
+ if (rc)
+ goto out_up;
+
+ rc = via_dsp_do_read (card, buffer, count, nonblock);
+
+out_up:
+ up (&card->syscall_sem);
+out:
+ DPRINTK ("EXIT, returning %ld\n",(long) rc);
+ return rc;
+}
+
+
+static ssize_t via_dsp_do_write (struct via_info *card,
+ const char __user *userbuf, size_t count,
+ int nonblock)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ const char __user *orig_userbuf = userbuf;
+ struct via_channel *chan = &card->ch_out;
+ volatile struct via_sgd_table *sgtable = chan->sgtable;
+ size_t size;
+ int n, tmp;
+ ssize_t ret = 0;
+
+handle_one_block:
+ /* just to be a nice neighbor */
+ /* Thomas Sailer:
+ * But also to ourselves, release semaphore if we do so */
+ if (need_resched()) {
+ up(&card->syscall_sem);
+ schedule ();
+ ret = via_syscall_down (card, nonblock);
+ if (ret)
+ goto out;
+ }
+
+ /* grab current channel fragment pointer. In the case of
+ * playback, this is pointing to the next fragment that
+ * should receive data from userland.
+ */
+ n = chan->sw_ptr;
+
+ /* n_frags represents the number of fragments remaining
+ * to be filled by userspace. Sleep until
+ * at least one fragment is available for our use.
+ */
+ add_wait_queue(&chan->wait, &wait);
+ for (;;) {
+ __set_current_state(TASK_INTERRUPTIBLE);
+ tmp = atomic_read (&chan->n_frags);
+ assert (tmp >= 0);
+ assert (tmp <= chan->frag_number);
+ if (tmp)
+ break;
+ if (nonblock || !chan->is_active) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ up(&card->syscall_sem);
+
+ DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
+ schedule();
+
+ ret = via_syscall_down (card, nonblock);
+ if (ret)
+ break;
+
+ if (signal_pending (current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&chan->wait, &wait);
+ if (ret)
+ goto out;
+
+ /* Now that we have at least one fragment we can write to, fill the buffer
+ * as much as possible with data from userspace.
+ */
+ while ((count > 0) && (chan->slop_len < chan->frag_size)) {
+ size_t slop_left = chan->frag_size - chan->slop_len;
+
+ size = (count < slop_left) ? count : slop_left;
+ if (copy_from_user (chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size + chan->slop_len,
+ userbuf, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ count -= size;
+ chan->slop_len += size;
+ userbuf += size;
+ }
+
+ /* If we didn't fill up the buffer with data, stop now.
+ * Put a 'stop' marker in the DMA table too, to tell the
+ * audio hardware to stop if it gets here.
+ */
+ if (chan->slop_len < chan->frag_size) {
+ sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
+ goto out;
+ }
+
+ /*
+ * If we get to this point, we have filled a buffer with
+ * audio data, flush the buffer to audio hardware.
+ */
+
+ /* Record the true size for the audio hardware to notice */
+ if (n == (chan->frag_number - 1))
+ sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
+ else
+ sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
+
+ /* advance channel software pointer to point to
+ * the next buffer we will fill with data
+ */
+ if (chan->sw_ptr == (chan->frag_number - 1))
+ chan->sw_ptr = 0;
+ else
+ chan->sw_ptr++;
+
+ /* mark one less buffer as being available for userspace consumption */
+ assert (atomic_read (&chan->n_frags) > 0);
+ atomic_dec (&chan->n_frags);
+
+ /* we are at a block boundary, there is no fragment data */
+ chan->slop_len = 0;
+
+ /* if SGD has not yet been started, start it */
+ via_chan_maybe_start (chan);
+
+ DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
+ n, chan->sw_ptr, atomic_read (&chan->n_frags));
+
+ DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
+ inb (card->baseaddr + 0x00),
+ inb (card->baseaddr + 0x01),
+ inb (card->baseaddr + 0x02),
+ inl (card->baseaddr + 0x04),
+ inl (card->baseaddr + 0x08),
+ inl (card->baseaddr + 0x0C),
+ inl (card->baseaddr + 0x80),
+ inl (card->baseaddr + 0x84));
+
+ if (count > 0)
+ goto handle_one_block;
+
+out:
+ if (userbuf - orig_userbuf)
+ return userbuf - orig_userbuf;
+ else
+ return ret;
+}
+
+
+static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+{
+ struct via_info *card;
+ ssize_t rc;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+
+ DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
+ file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
+
+ assert (file != NULL);
+ card = file->private_data;
+ assert (card != NULL);
+
+ rc = via_syscall_down (card, nonblock);
+ if (rc) goto out;
+
+ if (card->ch_out.is_mapped) {
+ rc = -ENXIO;
+ goto out_up;
+ }
+
+ via_chan_set_buffering(card, &card->ch_out, -1);
+ rc = via_chan_buffer_init (card, &card->ch_out);
+
+ if (rc)
+ goto out_up;
+
+ rc = via_dsp_do_write (card, buffer, count, nonblock);
+
+out_up:
+ up (&card->syscall_sem);
+out:
+ DPRINTK ("EXIT, returning %ld\n",(long) rc);
+ return rc;
+}
+
+
+static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct via_info *card;
+ struct via_channel *chan;
+ unsigned int mask = 0;
+
+ DPRINTK ("ENTER\n");
+
+ assert (file != NULL);
+ card = file->private_data;
+ assert (card != NULL);
+
+ if (file->f_mode & FMODE_READ) {
+ chan = &card->ch_in;
+ if (sg_active (chan->iobase))
+ poll_wait(file, &chan->wait, wait);
+ if (atomic_read (&chan->n_frags) > 0)
+ mask |= POLLIN | POLLRDNORM;
+ }
+
+ if (file->f_mode & FMODE_WRITE) {
+ chan = &card->ch_out;
+ if (sg_active (chan->iobase))
+ poll_wait(file, &chan->wait, wait);
+ if (atomic_read (&chan->n_frags) > 0)
+ mask |= POLLOUT | POLLWRNORM;
+ }
+
+ DPRINTK ("EXIT, returning %u\n", mask);
+ return mask;
+}
+
+
+/**
+ * via_dsp_drain_playback - sleep until all playback samples are flushed
+ * @card: Private info for specified board
+ * @chan: Channel to drain
+ * @nonblock: boolean, non-zero if O_NONBLOCK is set
+ *
+ * Sleeps until all playback has been flushed to the audio
+ * hardware.
+ *
+ * Locking: inside card->syscall_sem
+ */
+
+static int via_dsp_drain_playback (struct via_info *card,
+ struct via_channel *chan, int nonblock)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ int ret = 0;
+
+ DPRINTK ("ENTER, nonblock = %d\n", nonblock);
+
+ if (chan->slop_len > 0)
+ via_chan_flush_frag (chan);
+
+ if (atomic_read (&chan->n_frags) == chan->frag_number)
+ goto out;
+
+ via_chan_maybe_start (chan);
+
+ add_wait_queue(&chan->wait, &wait);
+ for (;;) {
+ DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
+ __set_current_state(TASK_INTERRUPTIBLE);
+ if (atomic_read (&chan->n_frags) >= chan->frag_number)
+ break;
+
+ if (nonblock) {
+ DPRINTK ("EXIT, returning -EAGAIN\n");
+ ret = -EAGAIN;
+ break;
+ }
+
+#ifdef VIA_DEBUG
+ {
+ u8 r40,r41,r42,r43,r44,r48;
+ pci_read_config_byte (card->pdev, 0x40, &r40);
+ pci_read_config_byte (card->pdev, 0x41, &r41);
+ pci_read_config_byte (card->pdev, 0x42, &r42);
+ pci_read_config_byte (card->pdev, 0x43, &r43);
+ pci_read_config_byte (card->pdev, 0x44, &r44);
+ pci_read_config_byte (card->pdev, 0x48, &r48);
+ DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
+ r40,r41,r42,r43,r44,r48);
+
+ DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
+ inb (card->baseaddr + 0x00),
+ inb (card->baseaddr + 0x01),
+ inb (card->baseaddr + 0x02),
+ inl (card->baseaddr + 0x04),
+ inl (card->baseaddr + 0x0C),
+ inl (card->baseaddr + 0x80),
+ inl (card->baseaddr + 0x84));
+ }
+
+ if (!chan->is_active)
+ printk (KERN_ERR "sleeping but not active\n");
+#endif
+
+ up(&card->syscall_sem);
+
+ DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
+ schedule();
+
+ if ((ret = via_syscall_down (card, nonblock)))
+ break;
+
+ if (signal_pending (current)) {
+ DPRINTK ("EXIT, returning -ERESTARTSYS\n");
+ ret = -ERESTARTSYS;
+ break;
+ }
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&chan->wait, &wait);
+
+#ifdef VIA_DEBUG
+ {
+ u8 r40,r41,r42,r43,r44,r48;
+ pci_read_config_byte (card->pdev, 0x40, &r40);
+ pci_read_config_byte (card->pdev, 0x41, &r41);
+ pci_read_config_byte (card->pdev, 0x42, &r42);
+ pci_read_config_byte (card->pdev, 0x43, &r43);
+ pci_read_config_byte (card->pdev, 0x44, &r44);
+ pci_read_config_byte (card->pdev, 0x48, &r48);
+ DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
+ r40,r41,r42,r43,r44,r48);
+
+ DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
+ inb (card->baseaddr + 0x00),
+ inb (card->baseaddr + 0x01),
+ inb (card->baseaddr + 0x02),
+ inl (card->baseaddr + 0x04),
+ inl (card->baseaddr + 0x0C),
+ inl (card->baseaddr + 0x80),
+ inl (card->baseaddr + 0x84));
+
+ DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
+ }
+#endif
+
+out:
+ DPRINTK ("EXIT, returning %d\n", ret);
+ return ret;
+}
+
+
+/**
+ * via_dsp_ioctl_space - get information about channel buffering
+ * @card: Private info for specified board
+ * @chan: pointer to channel-specific info
+ * @arg: user buffer for returned information
+ *
+ * Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
+ *
+ * Locking: inside card->syscall_sem
+ */
+
+static int via_dsp_ioctl_space (struct via_info *card,
+ struct via_channel *chan,
+ void __user *arg)
+{
+ audio_buf_info info;
+
+ via_chan_set_buffering(card, chan, -1);
+
+ info.fragstotal = chan->frag_number;
+ info.fragsize = chan->frag_size;
+
+ /* number of full fragments we can read/write without blocking */
+ info.fragments = atomic_read (&chan->n_frags);
+
+ if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
+ info.fragments--;
+
+ /* number of bytes that can be read or written immediately
+ * without blocking.
+ */
+ info.bytes = (info.fragments * chan->frag_size);
+ if (chan->slop_len % chan->frag_size > 0)
+ info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
+
+ DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
+ info.fragstotal,
+ info.fragsize,
+ info.fragments,
+ info.bytes);
+
+ return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
+}
+
+
+/**
+ * via_dsp_ioctl_ptr - get information about hardware buffer ptr
+ * @card: Private info for specified board
+ * @chan: pointer to channel-specific info
+ * @arg: user buffer for returned information
+ *
+ * Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
+ *
+ * Locking: inside card->syscall_sem
+ */
+
+static int via_dsp_ioctl_ptr (struct via_info *card,
+ struct via_channel *chan,
+ void __user *arg)
+{
+ count_info info;
+
+ spin_lock_irq (&card->lock);
+
+ info.bytes = chan->bytes;
+ info.blocks = chan->n_irqs;
+ chan->n_irqs = 0;
+
+ spin_unlock_irq (&card->lock);
+
+ if (chan->is_active) {
+ unsigned long extra;
+ info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
+ extra = chan->frag_size - via_sg_offset(chan);
+ info.ptr += extra;
+ info.bytes += extra;
+ } else {
+ info.ptr = 0;
+ }
+
+ DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
+ info.bytes,
+ info.blocks,
+ info.ptr);
+
+ return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
+}
+
+
+static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
+{
+ int enable, do_something;
+
+ if (chan->is_record)
+ enable = (val & PCM_ENABLE_INPUT);
+ else
+ enable = (val & PCM_ENABLE_OUTPUT);
+
+ if (!chan->is_enabled && enable) {
+ do_something = 1;
+ } else if (chan->is_enabled && !enable) {
+ do_something = -1;
+ } else {
+ do_something = 0;
+ }
+
+ DPRINTK ("enable=%d, do_something=%d\n",
+ enable, do_something);
+
+ if (chan->is_active && do_something)
+ return -EINVAL;
+
+ if (do_something == 1) {
+ chan->is_enabled = 1;
+ via_chan_maybe_start (chan);
+ DPRINTK ("Triggering input\n");
+ }
+
+ else if (do_something == -1) {
+ chan->is_enabled = 0;
+ DPRINTK ("Setup input trigger\n");
+ }
+
+ return 0;
+}
+
+
+static int via_dsp_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int rc, rd=0, wr=0, val=0;
+ struct via_info *card;
+ struct via_channel *chan;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+ int __user *ip = (int __user *)arg;
+ void __user *p = (void __user *)arg;
+
+ assert (file != NULL);
+ card = file->private_data;
+ assert (card != NULL);
+
+ if (file->f_mode & FMODE_WRITE)
+ wr = 1;
+ if (file->f_mode & FMODE_READ)
+ rd = 1;
+
+ rc = via_syscall_down (card, nonblock);
+ if (rc)
+ return rc;
+ rc = -EINVAL;
+
+ switch (cmd) {
+
+ /* OSS API version. XXX unverified */
+ case OSS_GETVERSION:
+ DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
+ rc = put_user (SOUND_VERSION, ip);
+ break;
+
+ /* list of supported PCM data formats */
+ case SNDCTL_DSP_GETFMTS:
+ DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
+ rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
+ break;
+
+ /* query or set current channel's PCM data format */
+ case SNDCTL_DSP_SETFMT:
+ if (get_user(val, ip)) {
+ rc = -EFAULT;
+ break;
+ }
+ DPRINTK ("DSP_SETFMT, val==%d\n", val);
+ if (val != AFMT_QUERY) {
+ rc = 0;
+
+ if (rd)
+ rc = via_chan_set_fmt (card, &card->ch_in, val);
+
+ if (rc >= 0 && wr)
+ rc = via_chan_set_fmt (card, &card->ch_out, val);
+
+ if (rc < 0)
+ break;
+
+ val = rc;
+ } else {
+ if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
+ (wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
+ val = AFMT_S16_LE;
+ else
+ val = AFMT_U8;
+ }
+ DPRINTK ("SETFMT EXIT, returning %d\n", val);
+ rc = put_user (val, ip);
+ break;
+
+ /* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
+ case SNDCTL_DSP_CHANNELS:
+ if (get_user(val, ip)) {
+ rc = -EFAULT;
+ break;
+ }
+ DPRINTK ("DSP_CHANNELS, val==%d\n", val);
+ if (val != 0) {
+ rc = 0;
+
+ if (rd)
+ rc = via_chan_set_stereo (card, &card->ch_in, val);
+
+ if (rc >= 0 && wr)
+ rc = via_chan_set_stereo (card, &card->ch_out, val);
+
+ if (rc < 0)
+ break;
+
+ val = rc;
+ } else {
+ if (rd)
+ val = card->ch_in.channels;
+ else
+ val = card->ch_out.channels;
+ }
+ DPRINTK ("CHANNELS EXIT, returning %d\n", val);
+ rc = put_user (val, ip);
+ break;
+
+ /* enable (val is not zero) or disable (val == 0) stereo */
+ case SNDCTL_DSP_STEREO:
+ if (get_user(val, ip)) {
+ rc = -EFAULT;
+ break;
+ }
+ DPRINTK ("DSP_STEREO, val==%d\n", val);
+ rc = 0;
+
+ if (rd)
+ rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
+ if (rc >= 0 && wr)
+ rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
+
+ if (rc < 0)
+ break;
+
+ val = rc - 1;
+
+ DPRINTK ("STEREO EXIT, returning %d\n", val);
+ rc = put_user(val, ip);
+ break;
+
+ /* query or set sampling rate */
+ case SNDCTL_DSP_SPEED:
+ if (get_user(val, ip)) {
+ rc = -EFAULT;
+ break;
+ }
+ DPRINTK ("DSP_SPEED, val==%d\n", val);
+ if (val < 0) {
+ rc = -EINVAL;
+ break;
+ }
+ if (val > 0) {
+ rc = 0;
+
+ if (rd)
+ rc = via_chan_set_speed (card, &card->ch_in, val);
+ if (rc >= 0 && wr)
+ rc = via_chan_set_speed (card, &card->ch_out, val);
+
+ if (rc < 0)
+ break;
+
+ val = rc;
+ } else {
+ if (rd)
+ val = card->ch_in.rate;
+ else if (wr)
+ val = card->ch_out.rate;
+ else
+ val = 0;
+ }
+ DPRINTK ("SPEED EXIT, returning %d\n", val);
+ rc = put_user (val, ip);
+ break;
+
+ /* wait until all buffers have been played, and then stop device */
+ case SNDCTL_DSP_SYNC:
+ DPRINTK ("DSP_SYNC\n");
+ rc = 0;
+ if (wr) {
+ DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
+ rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
+ }
+ break;
+
+ /* stop recording/playback immediately */
+ case SNDCTL_DSP_RESET:
+ DPRINTK ("DSP_RESET\n");
+ if (rd) {
+ via_chan_clear (card, &card->ch_in);
+ card->ch_in.frag_number = 0;
+ card->ch_in.frag_size = 0;
+ atomic_set(&card->ch_in.n_frags, 0);
+ }
+
+ if (wr) {
+ via_chan_clear (card, &card->ch_out);
+ card->ch_out.frag_number = 0;
+ card->ch_out.frag_size = 0;
+ atomic_set(&card->ch_out.n_frags, 0);
+ }
+
+ rc = 0;
+ break;
+
+ case SNDCTL_DSP_NONBLOCK:
+ file->f_flags |= O_NONBLOCK;
+ rc = 0;
+ break;
+
+ /* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
+ case SNDCTL_DSP_GETCAPS:
+ DPRINTK ("DSP_GETCAPS\n");
+ rc = put_user(VIA_DSP_CAP, ip);
+ break;
+
+ /* obtain buffer fragment size */
+ case SNDCTL_DSP_GETBLKSIZE:
+ DPRINTK ("DSP_GETBLKSIZE\n");
+
+ if (rd) {
+ via_chan_set_buffering(card, &card->ch_in, -1);
+ rc = put_user(card->ch_in.frag_size, ip);
+ } else if (wr) {
+ via_chan_set_buffering(card, &card->ch_out, -1);
+ rc = put_user(card->ch_out.frag_size, ip);
+ }
+ break;
+
+ /* obtain information about input buffering */
+ case SNDCTL_DSP_GETISPACE:
+ DPRINTK ("DSP_GETISPACE\n");
+ if (rd)
+ rc = via_dsp_ioctl_space (card, &card->ch_in, p);
+ break;
+
+ /* obtain information about output buffering */
+ case SNDCTL_DSP_GETOSPACE:
+ DPRINTK ("DSP_GETOSPACE\n");
+ if (wr)
+ rc = via_dsp_ioctl_space (card, &card->ch_out, p);
+ break;
+
+ /* obtain information about input hardware pointer */
+ case SNDCTL_DSP_GETIPTR:
+ DPRINTK ("DSP_GETIPTR\n");
+ if (rd)
+ rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
+ break;
+
+ /* obtain information about output hardware pointer */
+ case SNDCTL_DSP_GETOPTR:
+ DPRINTK ("DSP_GETOPTR\n");
+ if (wr)
+ rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
+ break;
+
+ /* return number of bytes remaining to be played by DMA engine */
+ case SNDCTL_DSP_GETODELAY:
+ {
+ DPRINTK ("DSP_GETODELAY\n");
+
+ chan = &card->ch_out;
+
+ if (!wr)
+ break;
+
+ if (chan->is_active) {
+
+ val = chan->frag_number - atomic_read (&chan->n_frags);
+
+ assert(val >= 0);
+
+ if (val > 0) {
+ val *= chan->frag_size;
+ val -= chan->frag_size - via_sg_offset(chan);
+ }
+ val += chan->slop_len % chan->frag_size;
+ } else
+ val = 0;
+
+ assert (val <= (chan->frag_size * chan->frag_number));
+
+ DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
+ rc = put_user (val, ip);
+ break;
+ }
+
+ /* handle the quick-start of a channel,
+ * or the notification that a quick-start will
+ * occur in the future
+ */
+ case SNDCTL_DSP_SETTRIGGER:
+ if (get_user(val, ip)) {
+ rc = -EFAULT;
+ break;
+ }
+ DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
+ rd, wr, card->ch_in.is_active, card->ch_out.is_active,
+ card->ch_in.is_enabled, card->ch_out.is_enabled);
+
+ rc = 0;
+
+ if (rd)
+ rc = via_dsp_ioctl_trigger (&card->ch_in, val);
+
+ if (!rc && wr)
+ rc = via_dsp_ioctl_trigger (&card->ch_out, val);
+
+ break;
+
+ case SNDCTL_DSP_GETTRIGGER:
+ val = 0;
+ if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
+ val |= PCM_ENABLE_INPUT;
+ if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
+ val |= PCM_ENABLE_OUTPUT;
+ rc = put_user(val, ip);
+ break;
+
+ /* Enable full duplex. Since we do this as soon as we are opened
+ * with O_RDWR, this is mainly a no-op that always returns success.
+ */
+ case SNDCTL_DSP_SETDUPLEX:
+ DPRINTK ("DSP_SETDUPLEX\n");
+ if (!rd || !wr)
+ break;
+ rc = 0;
+ break;
+
+ /* set fragment size. implemented as a successful no-op for now */
+ case SNDCTL_DSP_SETFRAGMENT:
+ if (get_user(val, ip)) {
+ rc = -EFAULT;
+ break;
+ }
+ DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
+
+ if (rd)
+ rc = via_chan_set_buffering(card, &card->ch_in, val);
+
+ if (wr)
+ rc = via_chan_set_buffering(card, &card->ch_out, val);
+
+ DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
+ val & 0xFFFF,
+ val & 0xFFFF,
+ (val >> 16) & 0xFFFF,
+ (val >> 16) & 0xFFFF);
+
+ rc = 0;
+ break;
+
+ /* inform device of an upcoming pause in input (or output). */
+ case SNDCTL_DSP_POST:
+ DPRINTK ("DSP_POST\n");
+ if (wr) {
+ if (card->ch_out.slop_len > 0)
+ via_chan_flush_frag (&card->ch_out);
+ via_chan_maybe_start (&card->ch_out);
+ }
+
+ rc = 0;
+ break;
+
+ /* not implemented */
+ default:
+ DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
+ cmd, p);
+ break;
+ }
+
+ up (&card->syscall_sem);
+ DPRINTK ("EXIT, returning %d\n", rc);
+ return rc;
+}
+
+
+static int via_dsp_open (struct inode *inode, struct file *file)
+{
+ int minor = iminor(inode);
+ struct via_info *card;
+ struct pci_dev *pdev = NULL;
+ struct via_channel *chan;
+ struct pci_driver *drvr;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+
+ DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
+
+ if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
+ DPRINTK ("EXIT, returning -EINVAL\n");
+ return -EINVAL;
+ }
+
+ card = NULL;
+ while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
+ drvr = pci_dev_driver (pdev);
+ if (drvr == &via_driver) {
+ assert (pci_get_drvdata (pdev) != NULL);
+
+ card = pci_get_drvdata (pdev);
+ DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
+ card->dev_dsp, minor,
+ (card->dev_dsp ^ minor) & ~0xf);
+
+ if (((card->dev_dsp ^ minor) & ~0xf) == 0)
+ goto match;
+ }
+ }
+
+ DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
+ return -ENODEV;
+
+match:
+ if (nonblock) {
+ if (down_trylock (&card->open_sem)) {
+ DPRINTK ("EXIT, returning -EAGAIN\n");
+ return -EAGAIN;
+ }
+ } else {
+ if (down_interruptible (&card->open_sem)) {
+ DPRINTK ("EXIT, returning -ERESTARTSYS\n");
+ return -ERESTARTSYS;
+ }
+ }
+
+ file->private_data = card;
+ DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
+
+ /* handle input from analog source */
+ if (file->f_mode & FMODE_READ) {
+ chan = &card->ch_in;
+
+ via_chan_init (card, chan);
+
+ /* why is this forced to 16-bit stereo in all drivers? */
+ chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
+ chan->channels = 2;
+
+ // TO DO - use FIFO: via_capture_fifo(card, 1);
+ via_chan_pcm_fmt (chan, 0);
+ via_set_rate (card->ac97, chan, 44100);
+ }
+
+ /* handle output to analog source */
+ if (file->f_mode & FMODE_WRITE) {
+ chan = &card->ch_out;
+
+ via_chan_init (card, chan);
+
+ if (file->f_mode & FMODE_READ) {
+ /* if in duplex mode make the recording and playback channels
+ have the same settings */
+ chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
+ chan->channels = 2;
+ via_chan_pcm_fmt (chan, 0);
+ via_set_rate (card->ac97, chan, 44100);
+ } else {
+ if ((minor & 0xf) == SND_DEV_DSP16) {
+ chan->pcm_fmt = VIA_PCM_FMT_16BIT;
+ via_chan_pcm_fmt (chan, 0);
+ via_set_rate (card->ac97, chan, 44100);
+ } else {
+ via_chan_pcm_fmt (chan, 1);
+ via_set_rate (card->ac97, chan, 8000);
+ }
+ }
+ }
+
+ DPRINTK ("EXIT, returning 0\n");
+ return nonseekable_open(inode, file);
+}
+
+
+static int via_dsp_release(struct inode *inode, struct file *file)
+{
+ struct via_info *card;
+ int nonblock = (file->f_flags & O_NONBLOCK);
+ int rc;
+
+ DPRINTK ("ENTER\n");
+
+ assert (file != NULL);
+ card = file->private_data;
+ assert (card != NULL);
+
+ rc = via_syscall_down (card, nonblock);
+ if (rc) {
+ DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
+ return rc;
+ }
+
+ if (file->f_mode & FMODE_WRITE) {
+ rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
+ if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
+ printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
+
+ via_chan_free (card, &card->ch_out);
+ via_chan_buffer_free(card, &card->ch_out);
+ }
+
+ if (file->f_mode & FMODE_READ) {
+ via_chan_free (card, &card->ch_in);
+ via_chan_buffer_free (card, &card->ch_in);
+ }
+
+ up (&card->syscall_sem);
+ up (&card->open_sem);
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+
+/****************************************************************
+ *
+ * Chip setup and kernel registration
+ *
+ *
+ */
+
+static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
+{
+#ifdef CONFIG_MIDI_VIA82CXXX
+ u8 r42;
+#endif
+ int rc;
+ struct via_info *card;
+ static int printed_version;
+
+ DPRINTK ("ENTER\n");
+
+ if (printed_version++ == 0)
+ printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
+
+ rc = pci_enable_device (pdev);
+ if (rc)
+ goto err_out;
+
+ rc = pci_request_regions (pdev, "via82cxxx_audio");
+ if (rc)
+ goto err_out_disable;
+
+ rc = pci_set_dma_mask(pdev, 0xffffffffULL);
+ if (rc)
+ goto err_out_res;
+ rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL);
+ if (rc)
+ goto err_out_res;
+
+ card = kmalloc (sizeof (*card), GFP_KERNEL);
+ if (!card) {
+ printk (KERN_ERR PFX "out of memory, aborting\n");
+ rc = -ENOMEM;
+ goto err_out_res;
+ }
+
+ pci_set_drvdata (pdev, card);
+
+ memset (card, 0, sizeof (*card));
+ card->pdev = pdev;
+ card->baseaddr = pci_resource_start (pdev, 0);
+ card->card_num = via_num_cards++;
+ spin_lock_init (&card->lock);
+ spin_lock_init (&card->ac97_lock);
+ init_MUTEX (&card->syscall_sem);
+ init_MUTEX (&card->open_sem);
+
+ /* we must init these now, in case the intr handler needs them */
+ via_chan_init_defaults (card, &card->ch_out);
+ via_chan_init_defaults (card, &card->ch_in);
+ via_chan_init_defaults (card, &card->ch_fm);
+
+ /* if BAR 2 is present, chip is Rev H or later,
+ * which means it has a few extra features */
+ if (pci_resource_start (pdev, 2) > 0)
+ card->rev_h = 1;
+
+ /* Overkill for now, but more flexible done right */
+
+ card->intmask = id->driver_data;
+ card->legacy = !card->intmask;
+ card->sixchannel = id->driver_data;
+
+ if(card->sixchannel)
+ printk(KERN_INFO PFX "Six channel audio available\n");
+ if (pdev->irq < 1) {
+ printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
+ rc = -ENODEV;
+ goto err_out_kfree;
+ }
+
+ if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
+ printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
+ rc = -ENODEV;
+ goto err_out_kfree;
+ }
+
+ pci_set_master(pdev);
+
+ /*
+ * init AC97 mixer and codec
+ */
+ rc = via_ac97_init (card);
+ if (rc) {
+ printk (KERN_ERR PFX "AC97 init failed, aborting\n");
+ goto err_out_kfree;
+ }
+
+ /*
+ * init DSP device
+ */
+ rc = via_dsp_init (card);
+ if (rc) {
+ printk (KERN_ERR PFX "DSP device init failed, aborting\n");
+ goto err_out_have_mixer;
+ }
+
+ /*
+ * init and turn on interrupts, as the last thing we do
+ */
+ rc = via_interrupt_init (card);
+ if (rc) {
+ printk (KERN_ERR PFX "interrupt init failed, aborting\n");
+ goto err_out_have_dsp;
+ }
+
+ printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
+ card->card_num + 1, card->baseaddr, pdev->irq);
+
+#ifdef CONFIG_MIDI_VIA82CXXX
+ /* Disable by default */
+ card->midi_info.io_base = 0;
+
+ if(card->legacy)
+ {
+ pci_read_config_byte (pdev, 0x42, &r42);
+ /* Disable MIDI interrupt */
+ pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
+ if (r42 & VIA_CR42_MIDI_ENABLE)
+ {
+ if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
+ card->midi_info.io_base = pci_resource_start (pdev, 2);
+ else /* Address selected by byte 0x43 */
+ {
+ u8 r43;
+ pci_read_config_byte (pdev, 0x43, &r43);
+ card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
+ }
+
+ card->midi_info.irq = -pdev->irq;
+ if (probe_uart401(& card->midi_info, THIS_MODULE))
+ {
+ card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
+ pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
+ printk("Enabled Via MIDI\n");
+ }
+ }
+ }
+#endif
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+
+err_out_have_dsp:
+ via_dsp_cleanup (card);
+
+err_out_have_mixer:
+ via_ac97_cleanup (card);
+
+err_out_kfree:
+#ifndef VIA_NDEBUG
+ memset (card, 0xAB, sizeof (*card)); /* poison memory */
+#endif
+ kfree (card);
+
+err_out_res:
+ pci_release_regions (pdev);
+
+err_out_disable:
+ pci_disable_device (pdev);
+
+err_out:
+ pci_set_drvdata (pdev, NULL);
+ DPRINTK ("EXIT - returning %d\n", rc);
+ return rc;
+}
+
+
+static void __devexit via_remove_one (struct pci_dev *pdev)
+{
+ struct via_info *card;
+
+ DPRINTK ("ENTER\n");
+
+ assert (pdev != NULL);
+ card = pci_get_drvdata (pdev);
+ assert (card != NULL);
+
+#ifdef CONFIG_MIDI_VIA82CXXX
+ if (card->midi_info.io_base)
+ unload_uart401(&card->midi_info);
+#endif
+
+ free_irq (card->pdev->irq, card);
+ via_dsp_cleanup (card);
+ via_ac97_cleanup (card);
+
+#ifndef VIA_NDEBUG
+ memset (card, 0xAB, sizeof (*card)); /* poison memory */
+#endif
+ kfree (card);
+
+ pci_set_drvdata (pdev, NULL);
+
+ pci_release_regions (pdev);
+ pci_disable_device (pdev);
+ pci_set_power_state (pdev, 3); /* ...zzzzzz */
+
+ DPRINTK ("EXIT\n");
+ return;
+}
+
+
+/****************************************************************
+ *
+ * Driver initialization and cleanup
+ *
+ *
+ */
+
+static int __init init_via82cxxx_audio(void)
+{
+ int rc;
+
+ DPRINTK ("ENTER\n");
+
+ rc = pci_register_driver (&via_driver);
+ if (rc) {
+ DPRINTK ("EXIT, returning %d\n", rc);
+ return rc;
+ }
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+
+static void __exit cleanup_via82cxxx_audio(void)
+{
+ DPRINTK ("ENTER\n");
+
+ pci_unregister_driver (&via_driver);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+module_init(init_via82cxxx_audio);
+module_exit(cleanup_via82cxxx_audio);
+
+MODULE_AUTHOR("Jeff Garzik");
+MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
+MODULE_LICENSE("GPL");
+