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-rw-r--r--sound/oss/via82cxxx_audio.c3616
1 files changed, 0 insertions, 3616 deletions
diff --git a/sound/oss/via82cxxx_audio.c b/sound/oss/via82cxxx_audio.c
deleted file mode 100644
index f95aa094675..00000000000
--- a/sound/oss/via82cxxx_audio.c
+++ /dev/null
@@ -1,3616 +0,0 @@
-/*
- * 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/module.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/pci.h>
-#include <linux/poison.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/ioport.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <linux/mutex.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;
-
- unsigned locked_rate : 1;
-
- int mixer_vol; /* 8233/35 volume - not yet implemented */
-
- struct mutex syscall_mutex;
- struct mutex open_mutex;
-
- /* 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 (!mutex_trylock(&card->syscall_mutex))
- return -EAGAIN;
- } else {
- if (mutex_lock_interruptible(&card->syscall_mutex))
- 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_get_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:
- pci_dev_put(pdev);
- 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);
-
- mutex_unlock(&card->syscall_mutex);
-
-out:
- DPRINTK ("EXIT, returning %d\n", rc);
- return rc;
-}
-
-
-static const 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 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);
-#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 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, IRQF_SHARED, 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, IRQF_SHARED, 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 const 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;
- unsigned long max_bufs;
- 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_SIGBUS\n");
- return NOPAGE_SIGBUS; /* Nothing allocated */
- }
-
- pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
- rd = card->ch_in.is_mapped;
- wr = card->ch_out.is_mapped;
-
- max_bufs = chan->frag_number;
- if (rd && wr)
- max_bufs *= 2;
- if (pgoff >= max_bufs)
- return NOPAGE_SIGBUS;
-
- /* 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;
-
- mutex_unlock(&card->syscall_mutex);
- 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()) {
- mutex_unlock(&card->syscall_mutex);
- 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;
- }
-
- mutex_unlock(&card->syscall_mutex);
-
- 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:
- mutex_unlock(&card->syscall_mutex);
-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()) {
- mutex_unlock(&card->syscall_mutex);
- 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;
- }
-
- mutex_unlock(&card->syscall_mutex);
-
- 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:
- mutex_unlock(&card->syscall_mutex);
-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_mutex
- */
-
-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
-
- mutex_unlock(&card->syscall_mutex);
-
- 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_mutex
- */
-
-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_mutex
- */
-
-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;
- }
-
- mutex_unlock(&card->syscall_mutex);
- 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_get_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:
- pci_dev_put(pdev);
- if (nonblock) {
- if (!mutex_trylock(&card->open_mutex)) {
- DPRINTK ("EXIT, returning -EAGAIN\n");
- return -EAGAIN;
- }
- } else {
- if (mutex_lock_interruptible(&card->open_mutex)) {
- 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);
- }
-
- mutex_unlock(&card->syscall_mutex);
- mutex_unlock(&card->open_mutex);
-
- 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, DMA_32BIT_MASK);
- if (rc)
- goto err_out_res;
- rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
- 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);
- mutex_init(&card->syscall_mutex);
- mutex_init(&card->open_mutex);
-
- /* 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, OSS_POISON_FREE, 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, OSS_POISON_FREE, 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");
-