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2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 | /*
* Support for VIA 82Cxxx Audio Codecs
* Copyright 1999,2000 Jeff Garzik <jgarzik@mandrakesoft.com>
*
* Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
* See the "COPYING" file distributed with this software for more info.
*
* For a list of known bugs (errata) and documentation,
* see via-audio.pdf in linux/Documentation/DocBook.
* If this documentation does not exist, run "make pdfdocs".
* If "make pdfdocs" fails, obtain the documentation from
* the driver's Website at
* http://gtf.org/garzik/drivers/via82cxxx/
*
*/
#define VIA_VERSION "1.1.8"
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/pci.h>
#include <linux/init.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 <asm/io.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
/* much better to duplicate this value than include
* drivers/sound/sound_config.h just for this definition */
#define SND_DEV_DSP16 5
#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
#define 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
/* user switch: undefine to exclude /proc data */
#define VIA_PROC_FS 1
/* don't mess with this */
#ifndef CONFIG_PROC_FS
#undef VIA_PROC_FS
#endif
#define arraysize(x) (sizeof(x)/sizeof(*(x)))
#define MAX_CARDS 1
#define LINE_SIZE 10
#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_DMA_BUFFERS 16
#define VIA_DMA_BUF_SIZE PAGE_SIZE
/* 82C686 function 5 (audio codec) PCI configuration registers */
#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_OUT_BLOCK_COUNT 0x0C
#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_TABLE_ADDR 0x04
/* 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
#define VIA_BASE0_AC97_CTRL 0x80
#define VIA_BASE0_SGD_STATUS_SHADOW 0x84
#define VIA_BASE0_GPI_INT_ENABLE 0x8C
/* 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_FIFO (1<<6) /* enable FIFO? documented as "reserved" */
#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_PCM_FIFO | \
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_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_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)
/* h r puff n stuff */
#define VIA_FMT_STEREO 0x01
#define VIA_FMT_16BIT 0x02
#define VIA_FMT_MASK 0x03
#define VIA_DAC_SHIFT 0
#define VIA_ADC_SHIFT 4
/* undocumented(?) values for setting rate, from Via's source */
#define VIA_SET_RATE_IN 0x00320000 /* set input rate */
#define VIA_SET_RATE_OUT 0x002c0000 /* set output rate */
/* scatter-gather DMA table entry, exactly as passed to hardware */
struct via_sgd_table {
u32 addr;
u32 count; /* includes additional bits also */
};
#define VIA_EOL (1 << 31)
#define VIA_FLAG (1 << 30)
enum via_channel_states {
sgd_stopped = 0,
sgd_in_progress = 1,
};
struct via_sgd_data {
dma_addr_t handle;
volatile void *cpuaddr;
};
struct via_channel {
unsigned rate; /* sample rate */
u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
atomic_t state;
atomic_t buf_in_use;
atomic_t next_buf;
volatile struct via_sgd_table *sgtable;
dma_addr_t sgt_handle;
struct via_sgd_data sgbuf [VIA_DMA_BUFFERS];
wait_queue_head_t wait;
long iobase;
};
/* data stored for each chip */
struct via_info {
struct pci_dev *pdev;
long baseaddr;
struct ac97_codec ac97;
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;
wait_queue_head_t open_wait;
int open_mode;
struct via_channel ch_in;
struct via_channel ch_out;
};
/* number of cards, used for assigning unique numbers to cards */
static unsigned via_num_cards = 0;
/****************************************************************
*
* prototypes
*
*
*/
static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
static void via_remove_one (struct pci_dev *pdev);
static ssize_t via_dsp_read(struct file *file, char *buffer, size_t count, loff_t *ppos);
static ssize_t via_dsp_write(struct file *file, const char *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 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_channel *chan);
static void via_chan_pcm_fmt (struct via_info *card,
struct via_channel *chan, int reset);
/****************************************************************
*
* Various data the driver needs
*
*
*/
static struct pci_device_id via_pci_tbl[] __initdata = {
{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, PCI_ANY_ID, PCI_ANY_ID, },
{ 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: 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 (int 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 (int 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)
{
outb (VIA_SGD_START, chan->iobase + VIA_PCM_CONTROL);
}
/**
* via_chan_bufs_in_use - Number of buffers waiting to be consumed
* @chan: Channel for which DMA buffers will be counted
*
* Count the number of buffers waiting to be consumed. For a
* playback operation, this is the number of buffers which have
* yet to be sent to the DAC. For a recording operation, this
* is the number of buffers waiting to be consumed by software
* calling read() system call.
*
*/
static inline int via_chan_bufs_in_use (struct via_channel *chan)
{
return atomic_read(&chan->next_buf) -
atomic_read(&chan->buf_in_use);
}
/**
* via_chan_full - Check for no-free-buffers condition
* @chan: Channel for which DMA full condition will be checked
*
* Count the number of buffers waiting to be consumed, and return
* true (non-zero) if no buffers are available to be filled on the
* given DMA channel.
*
*/
static inline int via_chan_full (struct via_channel *chan)
{
return (via_chan_bufs_in_use (chan) == VIA_DMA_BUFFERS);
}
/**
* via_chan_empty - Check for no-buffers-in-use condition
* @chan: Channel for which DMA empty condition will be checked
*
* Count the number of buffers waiting to be consumed, and return
* true (non-zero) if no buffers are currently in use.
*
*/
static inline int via_chan_empty (struct via_channel *chan)
{
return (atomic_read(&chan->next_buf) ==
atomic_read(&chan->buf_in_use));
}
/****************************************************************
*
* Miscellaneous debris
*
*
*/
/**
* 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)
{
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);
/*
* 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);
/*
* clear any enabled interrupt bits, reset to 8-bit mono PCM mode
*/
outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
DPRINTK ("EXIT\n");
}
/**
* via_set_rate - Set PCM rate for given channel
* @card: Private info for specified board
* @rate: Desired PCM sample rate, in Khz
* @inhale_deeply: Boolean. If non-zero (true), the recording sample rate
* is set. If zero (false), the playback sample rate
* is set.
*
* 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.
*
* FIXME: @inhale_deeply argument is ignored, and %AC97_PCM_FRONT_DAC_RATE
* is the only rate which is really set. This needs to be fixed when
* recording support is added.
*/
static int via_set_rate (struct via_info *card, unsigned rate, int inhale_deeply)
{
DPRINTK ("ENTER, rate = %d, inhale = %s\n",
rate, inhale_deeply ? "yes" : "no");
if (rate > 48000) rate = 48000;
if (rate < 4000) rate = 4000;
via_ac97_write_reg (&card->ac97, AC97_POWER_CONTROL,
(via_ac97_read_reg (&card->ac97, AC97_POWER_CONTROL) & ~0x0200) |
0x0200);
via_ac97_write_reg (&card->ac97, AC97_PCM_FRONT_DAC_RATE, rate);
via_ac97_write_reg (&card->ac97, AC97_POWER_CONTROL,
via_ac97_read_reg (&card->ac97, AC97_POWER_CONTROL) & ~0x0200);
DPRINTK ("EXIT, returning 0\n");
return rate;
}
/**
* via_set_adc_rate - Set PCM rate for recording channel
* @card: Private info for specified board
* @rate: Desired PCM sample rate, in Khz
*
* Sets the PCM sample rate for a recording channel.
*
* FIXME: @inhale_deeply argument to via_set_rate is ignored, and %AC97_PCM_FRONT_DAC_RATE
* is the only rate which is really set. Thus, this function will
* not work until via_set_rate is fixed.
*/
static inline int via_set_adc_rate (struct via_info *card, int rate)
{
return via_set_rate (card, rate, 1);
}
/**
* via_set_dac_rate - Set PCM rate for playback channel
* @card: Private info for specified board
* @rate: Desired PCM sample rate, in Khz
*
* Sets the PCM sample rate for a playback channel.
*/
static inline int via_set_dac_rate (struct via_info *card, int rate)
{
return via_set_rate (card, rate, 0);
}
/****************************************************************
*
* Channel-specific operations
*
*
*/
/**
* via_chan_init - Initialize PCM channel
* @card: Private audio chip info
* @chan: Channel to be initialized
* @chan_ofs: Offset from PCI address, which determines the
* set of SGD registers to use.
*
* Performs all the preparations necessary to begin
* using a PCM channel.
*
* Currently the preparations include allocating the
* scatter-gather DMA table and buffers, setting the
* PCM channel to a known state, 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_init (struct via_info *card,
struct via_channel *chan, long chan_ofs)
{
int i;
unsigned long flags;
DPRINTK ("ENTER\n");
memset (chan, 0, sizeof (*chan));
/* alloc DMA-able memory for scatter-gather table */
chan->sgtable = pci_alloc_consistent (card->pdev,
(sizeof (struct via_sgd_table) * VIA_DMA_BUFFERS),
&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) * VIA_DMA_BUFFERS));
/* alloc DMA-able memory for scatter-gather buffers */
for (i = 0; i < VIA_DMA_BUFFERS; i++) {
chan->sgbuf[i].cpuaddr =
pci_alloc_consistent (card->pdev, VIA_DMA_BUF_SIZE,
&chan->sgbuf[i].handle);
if (!chan->sgbuf[i].cpuaddr)
goto err_out_nomem;
if (i < (VIA_DMA_BUFFERS - 1))
chan->sgtable[i].count = cpu_to_le32 (VIA_DMA_BUF_SIZE | VIA_FLAG);
else
chan->sgtable[i].count = cpu_to_le32 (VIA_DMA_BUF_SIZE | VIA_EOL);
chan->sgtable[i].addr = cpu_to_le32 (chan->sgbuf[i].handle);
#ifndef VIA_NDEBUG
memset (chan->sgbuf[i].cpuaddr, 0xBC, VIA_DMA_BUF_SIZE);
#endif
#if 1
DPRINTK ("dmabuf #%d (h=%lx, 32(h)=%lx, v2p=%lx, a=%p)\n",
i, (long)chan->sgbuf[i].handle,
(long)chan->sgtable[i].addr,
virt_to_phys(chan->sgbuf[i].cpuaddr),
chan->sgbuf[i].cpuaddr);
#endif
}
init_waitqueue_head (&chan->wait);
chan->pcm_fmt = VIA_PCM_FMT_MASK;
chan->iobase = card->baseaddr + chan_ofs;
spin_lock_irqsave (&card->lock, flags);
/* stop any existing channel output */
via_chan_clear (chan);
via_chan_status_clear (chan->iobase);
via_chan_pcm_fmt (card, chan, 1);
spin_unlock_irqrestore (&card->lock, flags);
/* set location of DMA-able scatter-gather info table */
DPRINTK("outl (0x%X, 0x%04lX)\n",
cpu_to_le32 (chan->sgt_handle),
card->baseaddr + chan_ofs + VIA_PCM_TABLE_ADDR);
via_ac97_wait_idle (card);
outl (cpu_to_le32 (chan->sgt_handle),
card->baseaddr + chan_ofs + VIA_PCM_TABLE_ADDR);
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_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)
{
int i;
unsigned long flags;
DPRINTK ("ENTER\n");
synchronize_irq();
spin_lock_irqsave (&card->lock, flags);
/* stop any existing channel output */
via_chan_stop (chan->iobase);
via_chan_status_clear (chan->iobase);
via_chan_pcm_fmt (card, chan, 1);
spin_unlock_irqrestore (&card->lock, flags);
/* 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 < VIA_DMA_BUFFERS; i++)
if (chan->sgbuf[i].cpuaddr) {
pci_free_consistent (card->pdev, VIA_DMA_BUF_SIZE,
(void*)chan->sgbuf[i].cpuaddr,
chan->sgbuf[i].handle);
chan->sgbuf[i].cpuaddr = NULL;
chan->sgbuf[i].handle = 0;
}
if (chan->sgtable) {
pci_free_consistent (card->pdev,
(sizeof (struct via_sgd_table) * VIA_DMA_BUFFERS),
(void*)chan->sgtable, chan->sgt_handle);
chan->sgtable = NULL;
}
DPRINTK ("EXIT\n");
}
/**
* via_chan_pcm_fmt - Update PCM channel settings
* @card: Private audio chip info
* @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_info *card,
struct via_channel *chan, int reset)
{
DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
chan->pcm_fmt, reset ? "yes" : "no");
assert (card != NULL);
assert (chan != NULL);
if (reset)
/* reset to 8-bit mono mode */
chan->pcm_fmt = 0;
/* enable interrupts on FLAG and EOL */
chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
/* set interrupt select bits where applicable (PCM & FM out channels) */
if (chan == &card->ch_out)
chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
outb (chan->pcm_fmt, chan->iobase + 2);
DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
chan->pcm_fmt,
inb (chan->iobase + 2));
}
/**
* via_chan_clear - Stop DMA channel operation, and reset pointers
* @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_channel *chan)
{
via_chan_stop (chan->iobase);
atomic_set (&chan->state, sgd_stopped);
atomic_set (&chan->buf_in_use, 0);
atomic_set (&chan->next_buf, 0);
}
/**
* 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 (chan);
val = via_set_rate (card, val, chan == &card->ch_in);
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 (chan);
switch (val) {
case AFMT_U8:
chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
via_chan_pcm_fmt (card, chan, 0);
break;
case AFMT_S16_LE:
chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
via_chan_pcm_fmt (card, chan, 0);
break;
default:
printk (KERN_WARNING PFX "unknown AFMT\n");
val = -EINVAL;
break;
}
DPRINTK ("EXIT, returning %d\n", val);
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 (chan);
switch (val) {
/* mono */
case 1:
chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
via_chan_pcm_fmt (card, chan, 0);
break;
/* stereo */
case 2:
chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
via_chan_pcm_fmt (card, chan, 0);
break;
/* unknown */
default:
printk (KERN_WARNING PFX "unknown number of channels\n");
val = -EINVAL;
break;
}
DPRINTK ("EXIT, returning %d\n", val);
return val;
}
#if 0
/**
* 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 < VIA_DMA_BUFFERS; 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->next_buf));
}
#endif
/****************************************************************
*
* 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 {
if (current->need_resched)
schedule ();
else
udelay (10);
spin_lock_irq (&card->lock);
tmp8 = inb (card->baseaddr + 0x83);
spin_unlock_irq (&card->lock);
} while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
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)
{
u32 data;
struct via_info *card;
int counter;
DPRINTK ("ENTER\n");
assert (codec != NULL);
assert (codec->private_data != NULL);
card = codec->private_data;
data = (reg << 16) | VIA_CR80_READ;
outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
udelay (20);
for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
if (inl (card->baseaddr + 0x80) & VIA_CR80_VALID)
goto out;
udelay(10);
if (current->need_resched)
schedule ();
}
printk (KERN_WARNING PFX "timeout while reading AC97 codec\n");
goto err_out;
out:
data = inl (card->baseaddr + 0x80);
outb (0x02, card->baseaddr + 0x83);
if (((data & 0x007F0000) >> 16) == reg) {
DPRINTK ("EXIT, success, data=0x%x, retval=0x%x\n",
data, data & 0x0000FFFF);
return data & 0x0000FFFF;
}
DPRINTK ("WARNING: not our index: reg=0x%x, newreg=0x%x\n",
reg, ((data & 0x007F0000) >> 16));
err_out:
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;
data = (reg << 16) + value;
outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
udelay (20);
for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
goto out;
udelay(10);
if (current->need_resched)
schedule ();
}
printk (KERN_WARNING PFX "timeout after AC97 codec write\n");
out:
DPRINTK ("EXIT\n");
}
static int via_mixer_open (struct inode *inode, struct file *file)
{
int minor = MINOR(inode->i_rdev);
struct via_info *card;
struct pci_dev *pdev;
struct pci_driver *drvr;
DPRINTK ("ENTER\n");
pci_for_each_dev(pdev) {
drvr = pci_dev_driver (pdev);
if (drvr == &via_driver) {
assert (pdev->driver_data != NULL);
card = pdev->driver_data;
if (card->ac97.dev_mixer == minor)
goto match;
}
}
DPRINTK ("EXIT, returning -ENODEV\n");
return -ENODEV;
match:
file->private_data = &card->ac97;
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
struct ac97_codec *codec = file->private_data;
int rc;
assert (codec != NULL);
rc = codec->mixer_ioctl(codec, cmd, arg);
return rc;
}
static loff_t via_llseek(struct file *file, loff_t offset, int origin)
{
DPRINTK ("ENTER\n");
DPRINTK("EXIT, returning -ESPIPE\n");
return -ESPIPE;
}
static struct file_operations via_mixer_fops = {
owner: THIS_MODULE,
open: via_mixer_open,
llseek: via_llseek,
ioctl: via_mixer_ioctl,
};
#if 0 /* values reasoned from debugging dumps of via's driver */
static struct {
u8 reg;
u16 data;
} mixer_init_vals[] __devinitdata = {
{ 0x2, 0x404 },
{ 0x4, 0x404 },
{ 0x6, 0x404 },
{ 0x18, 0x404 },
{ 0x10, 0x404 },
{ 0x1a, 0x404 },
{ 0x1c, 0x404 },
{ 0x1a, 0x404 },
{ 0x1c, 0xc0c },
{ 0x12, 0x808 },
{ 0x10, 0x808 },
{ 0xe, 0x2 },
{ 0x2, 0x808 },
{ 0x18, 0x808 },
};
#endif
static int __init 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
* pause after each command for good luck
*/
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);
#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);
/* enable variable rate */
tmp16 = via_ac97_read_reg (&card->ac97, 0x2A);
via_ac97_write_reg (&card->ac97, 0x2A, tmp16 | 0x01);
/* boost headphone vol if disabled */
tmp16 = via_ac97_read_reg (&card->ac97, AC97_HEADPHONE_VOL);
if (tmp16 == 0)
via_ac97_write_reg (&card->ac97, AC97_HEADPHONE_VOL, 0x1F1F);
pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
if ((tmp8 & (VIA_CR41_AC97_ENABLE | VIA_CR41_AC97_RESET)) == 0) {
printk (KERN_ERR PFX "cannot enable AC97 controller, aborting\n");
DPRINTK ("EXIT, tmp8=%X, returning -ENODEV\n", tmp8);
return -ENODEV;
}
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static int __init via_ac97_init (struct via_info *card)
{
int rc;
u16 tmp16;
DPRINTK ("ENTER\n");
assert (card != NULL);
memset (&card->ac97, 0, sizeof (card->ac97));
card->ac97.private_data = card;
card->ac97.codec_read = via_ac97_read_reg;
card->ac97.codec_write = via_ac97_write_reg;
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");
return -EIO;
}
rc = via_ac97_reset (card);
if (rc) {
printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
goto err_out;
}
if (ac97_probe_codec (&card->ac97) == 0) {
printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
rc = -EIO;
goto err_out;
}
tmp16 = via_ac97_read_reg (&card->ac97, 0x2A);
via_ac97_write_reg (&card->ac97, 0x2A, tmp16 | 0x01);
DPRINTK ("EXIT, returning 0\n");
return 0;
err_out:
unregister_sound_mixer (card->ac97.dev_mixer);
DPRINTK("EXIT, returning %d\n", rc);
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);
DPRINTK("EXIT\n");
}
/****************************************************************
*
* Interrupt-related code
*
*/
static inline void via_interrupt_write (struct via_channel *chan)
{
assert (atomic_read(&chan->buf_in_use) <
atomic_read(&chan->next_buf));
/* XXX sanity check: read h/w counter to
* ensure no lost frames */
atomic_inc (&chan->buf_in_use);
/* if SG ptr catches up with userland ptr, stop playback */
if (atomic_read(&chan->buf_in_use) == atomic_read(&chan->next_buf)) {
atomic_set (&chan->state, sgd_stopped);
via_chan_stop (chan->iobase);
}
/* wake up anybody listening */
if (waitqueue_active (&chan->wait))
wake_up (&chan->wait);
}
static void via_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct via_info *card = dev_id;
struct via_channel *chan;
u8 status;
status = inb (card->baseaddr + 0x00);
if (status) {
assert (card->open_mode & FMODE_WRITE);
chan = &card->ch_out;
if (status & VIA_SGD_FLAG) {
assert ((status & VIA_SGD_EOL) == 0);
outb (VIA_SGD_FLAG, chan->iobase + 0x00);
DPRINTK("FLAG intr, status=0x%02X\n", status);
via_interrupt_write (chan);
}
if (status & VIA_SGD_EOL) {
assert ((status & VIA_SGD_FLAG) == 0);
outb (VIA_SGD_EOL, chan->iobase + 0x00);
DPRINTK("EOL intr, status=0x%02X\n", status);
via_interrupt_write (chan);
}
if (status & VIA_SGD_STOPPED) {
outb (VIA_SGD_STOPPED, chan->iobase + 0x00);
DPRINTK("STOPPED intr, status=0x%02X\n", status);
}
#if 0
via_chan_dump_bufs (&card->ch_out);
#endif
}
}
static void via_interrupt_disable (struct via_info *card)
{
u8 tmp8;
unsigned long flags;
DPRINTK ("ENTER\n");
assert (card != NULL);
spin_lock_irqsave (&card->lock, flags);
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);
}
outb (inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE) &
VIA_INT_DISABLE_MASK,
card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
outb (inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE) &
VIA_INT_DISABLE_MASK,
card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
outb (inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE) &
VIA_INT_DISABLE_MASK,
card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
spin_unlock_irqrestore (&card->lock, flags);
DPRINTK ("EXIT\n");
}
static int via_interrupt_init (struct via_info *card)
{
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;
}
if (request_irq (card->pdev->irq, via_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
card->pdev->irq);
DPRINTK ("EXIT, returning -EBUSY\n");
return -EBUSY;
}
/* we don't want interrupts until we're opened */
via_interrupt_disable (card);
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static void via_interrupt_cleanup (struct via_info *card)
{
DPRINTK ("ENTER\n");
assert (card != NULL);
assert (card->pdev != NULL);
via_interrupt_disable (card);
free_irq (card->pdev->irq, card);
DPRINTK ("EXIT\n");
}
/****************************************************************
*
* OSS DSP device
*
*/
static struct file_operations via_dsp_fops = {
owner: THIS_MODULE,
open: via_dsp_open,
release: via_dsp_release,
read: via_dsp_read,
write: via_dsp_write,
poll: via_dsp_poll,
llseek: via_llseek,
ioctl: via_dsp_ioctl,
};
static int __init via_dsp_init (struct via_info *card)
{
u8 tmp8;
DPRINTK ("ENTER\n");
assert (card != NULL);
/* turn off legacy features, if not already */
pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_MIDI_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 ssize_t via_dsp_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
{
struct via_info *card;
DPRINTK ("ENTER\n");
assert (file != NULL);
assert (buffer != NULL);
card = file->private_data;
assert (card != NULL);
DPRINTK("EXIT, returning -EINVAL\n");
return -EINVAL;
}
#define sgcount(n) (sgtable[(n)].count & 0x00FFFFFF)
#define NEXTBUF (atomic_read(&chan->next_buf) % VIA_DMA_BUFFERS)
#define BUF_IN_USE (atomic_read(&chan->buf_in_use) % VIA_DMA_BUFFERS)
#define STATE_STOPPED (atomic_read (state) == sgd_stopped)
#define STATE_STARTED (atomic_read (state) == sgd_in_progress)
static ssize_t via_dsp_do_write (struct via_info *card,
const char *userbuf, size_t count,
int non_blocking)
{
const char *orig_userbuf = userbuf;
struct via_channel *chan = &card->ch_out;
volatile struct via_sgd_table *sgtable = chan->sgtable;
atomic_t *state = &chan->state;
size_t size;
int nextbuf, prevbuf, n, realcount;
ssize_t rc;
while (count > 0) {
if (current->need_resched)
schedule ();
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);
size = (count < VIA_DMA_BUF_SIZE) ? count : VIA_DMA_BUF_SIZE;
/* case 1: SGD not active, list is ours for the mangling */
if (STATE_STOPPED) {
DPRINTK ("case 1\n");
if (copy_from_user ((void*)chan->sgbuf[0].cpuaddr,
userbuf, size))
return -EFAULT;
assert (sgtable[0].addr == cpu_to_le32 (chan->sgbuf[0].handle));
sgtable[0].count = size | VIA_FLAG;
atomic_set (state, sgd_in_progress);
atomic_set (&chan->buf_in_use, 0);
atomic_set (&chan->next_buf, 1);
count -= size;
userbuf += size;
spin_lock_irq (&card->lock);
sg_begin (chan);
spin_unlock_irq (&card->lock);
continue;
}
nextbuf = NEXTBUF;
if (nextbuf)
prevbuf = nextbuf - 1;
else
prevbuf = VIA_DMA_BUFFERS - 1;
/* case 2: if final buffer is (a) a fragment, and (b) not
* currently being consumed by the SGD engine, then append
* as much data as possible to the fragment. */
realcount = sgcount(prevbuf);
if (STATE_STARTED && (prevbuf != BUF_IN_USE) &&
(realcount < VIA_DMA_BUF_SIZE)) {
DPRINTK ("case 2\n");
DPRINTK ("st=%d, fb=%d -- nb=%d, pb=%d, n=%d, rc=%d\n",
atomic_read (state),
BUF_IN_USE,
nextbuf,
prevbuf,
prevbuf /* n */,
realcount);
n = prevbuf;
if ((VIA_DMA_BUF_SIZE - realcount) < size)
size = VIA_DMA_BUF_SIZE - realcount;
if (copy_from_user ((void*)(chan->sgbuf[n].cpuaddr +
realcount),
userbuf, size))
return -EFAULT;
/* slack way to try and prevent races */
if (prevbuf == BUF_IN_USE || !STATE_STARTED)
continue;
assert (sgtable[n].addr == cpu_to_le32 (chan->sgbuf[n].handle));
if (n == (VIA_DMA_BUFFERS - 1))
sgtable[n].count = (realcount + size) | VIA_EOL;
else
sgtable[n].count = (realcount + size) | VIA_FLAG;
count -= size;
userbuf += size;
continue;
}
/* case 3: if there are buffers left, use one
* XXX needs more review for possible races */
else if (STATE_STARTED && !via_chan_full (chan)) {
DPRINTK ("case 3\n");
DPRINTK ("st=%d, fb=%d -- nb=%d, pb=%d, n=%d\n",
atomic_read (state),
BUF_IN_USE,
nextbuf,
prevbuf,
nextbuf /* n */);
n = nextbuf;
if (copy_from_user ((void*)chan->sgbuf[n].cpuaddr,
userbuf, size))
return -EFAULT;
if (n == (VIA_DMA_BUFFERS - 1))
sgtable[n].count = size | VIA_EOL;
else
sgtable[n].count = size | VIA_FLAG;
/* if SGD stopped during data copy or SG table update,
* then loop back to the beginning without updating
* any pointers.
* ie. slack way to prevent race */
if (!STATE_STARTED)
continue;
atomic_inc (&chan->next_buf);
count -= size;
userbuf += size;
continue;
}
/* case 4, final SGT active case: no free buffers, wait for one */
else {
DPRINTK ("case 4\n");
DPRINTK ("st=%d, fb=%d -- nb=%d, pb=%d\n",
atomic_read (state),
BUF_IN_USE,
nextbuf,
prevbuf);
/* if playback stopped, no need to sleep */
if (!STATE_STARTED)
continue;
/* if buffer free, no need to sleep */
if (!via_chan_full (chan))
continue;
if (non_blocking) {
rc = userbuf - orig_userbuf;
if (rc == 0)
rc = -EAGAIN;
return rc;
}
DPRINTK ("sleeping\n");
interruptible_sleep_on (&chan->wait);
if (signal_pending (current))
return -ERESTARTSYS;
}
}
#if 0
{
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);
}
#endif
DPRINTK ("EXIT, returning %d\n",
userbuf - orig_userbuf);
return userbuf - orig_userbuf;
}
#undef sgcount
#undef NEXTBUF
#undef BUF_IN_USE
#undef STATE_STOPPED
#undef STATE_STARTED
static ssize_t via_dsp_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
{
struct via_info *card;
ssize_t rc;
DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
assert (file != NULL);
assert (buffer != NULL);
card = file->private_data;
assert (card != NULL);
if (ppos != &file->f_pos) {
DPRINTK ("EXIT, returning -ESPIPE\n");
return -ESPIPE;
}
rc = via_dsp_do_write (card, buffer, count, (file->f_flags & O_NONBLOCK));
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;
unsigned int mask = 0;
DPRINTK ("ENTER\n");
assert (file != NULL);
assert (wait != NULL);
card = file->private_data;
assert (card != NULL);
if ((file->f_mode & FMODE_WRITE) &&
(atomic_read (&card->ch_out.state) != sgd_stopped)) {
poll_wait(file, &card->ch_out.wait, wait);
/* XXX is this correct */
if (atomic_read (&card->ch_out.buf_in_use) <
atomic_read (&card->ch_out.next_buf))
mask |= POLLOUT | POLLWRNORM;
}
DPRINTK("EXIT, returning %u\n", mask);
return mask;
}
static int via_dsp_drain_dac (struct via_info *card, int non_block)
{
DPRINTK ("ENTER, non_block = %d\n", non_block);
while (!via_chan_empty (&card->ch_out)) {
if (non_block) {
DPRINTK ("EXIT, returning -EBUSY\n");
return -EBUSY;
}
if (signal_pending (current)) {
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
return -ERESTARTSYS;
}
#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
DPRINTK ("sleeping\n");
interruptible_sleep_on (&card->ch_out.wait);
}
DPRINTK ("EXIT\n");
return 0;
}
static int via_dsp_ioctl_space (struct via_info *card,
struct via_channel *chan,
void *arg)
{
audio_buf_info info;
int n;
info.fragstotal = VIA_DMA_BUFFERS;
info.fragsize = VIA_DMA_BUF_SIZE;
/* number of full fragments we can read without blocking */
n = atomic_read (&chan->next_buf) - atomic_read (&chan->buf_in_use);
info.fragments = VIA_DMA_BUFFERS - n;
/* number of bytes that can be read or written immediately
* without blocking. FIXME: we are lazy and ignore partially-full
* buffers.
*/
info.bytes = info.fragments * VIA_DMA_BUF_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));
}
static int via_dsp_ioctl (struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int rc = -EINVAL, rd=0, wr=0, val=0;
struct via_info *card;
DPRINTK ("ENTER, cmd = 0x%08X\n", cmd);
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;
switch (cmd) {
/* OSS API version. XXX unverified */
case OSS_GETVERSION:
DPRINTK("EXIT, returning SOUND_VERSION\n");
return put_user (SOUND_VERSION, (int *)arg);
/* list of supported PCM data formats */
case SNDCTL_DSP_GETFMTS:
DPRINTK("EXIT, returning AFMT U8|S16_LE\n");
return put_user (AFMT_U8 | AFMT_S16_LE, (int *)arg);
/* query or set current channel's PCM data format */
case SNDCTL_DSP_SETFMT:
get_user_ret(val, (int *)arg, -EFAULT);
if (val != AFMT_QUERY) {
rc = 0;
spin_lock_irq (&card->lock);
if (rc == 0 && 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);
spin_unlock_irq (&card->lock);
if (rc <= 0)
return rc ? rc : -EINVAL;
val = rc;
} else {
spin_lock_irq (&card->lock);
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;
spin_unlock_irq (&card->lock);
}
DPRINTK("SETFMT EXIT, returning %d\n", val);
return put_user (val, (int *)arg);
/* query or set number of channels (1=mono, 2=stereo) */
case SNDCTL_DSP_CHANNELS:
get_user_ret(val, (int *)arg, -EFAULT);
if (val != 0) {
rc = 0;
spin_lock_irq (&card->lock);
if (rc == 0 && 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);
spin_unlock_irq (&card->lock);
if (rc <= 0)
return rc ? rc : -EINVAL;
val = rc;
} else {
spin_lock_irq (&card->lock);
if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_STEREO)) ||
(wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_STEREO)))
val = 2;
else
val = 1;
spin_unlock_irq (&card->lock);
}
DPRINTK("CHANNELS EXIT, returning %d\n", val);
return put_user (val, (int *)arg);
/* enable (val is not zero) or disable (val == 0) stereo */
case SNDCTL_DSP_STEREO:
get_user_ret(val, (int *)arg, -EFAULT);
rc = 0;
spin_lock_irq (&card->lock);
if (rc == 0 && 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);
spin_unlock_irq (&card->lock);
if (rc <= 0)
return rc ? rc : -EINVAL;
DPRINTK("STEREO EXIT, returning %d\n", val);
return 0;
/* query or set sampling rate */
case SNDCTL_DSP_SPEED:
get_user_ret(val, (int *)arg, -EFAULT);
if (val < 0)
return -EINVAL;
if (val > 0) {
rc = 0;
spin_lock_irq (&card->lock);
if (rc == 0 && 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);
spin_unlock_irq (&card->lock);
if (rc <= 0)
return rc ? rc : -EINVAL;
val = rc;
} else {
spin_lock_irq (&card->lock);
if (rd)
val = card->ch_in.rate;
else if (wr)
val = card->ch_out.rate;
else
val = 0;
spin_unlock_irq (&card->lock);
}
DPRINTK("SPEED EXIT, returning %d\n", val);
return put_user (val, (int *)arg);
/* wait until all buffers have been played, and then stop device */
case SNDCTL_DSP_SYNC:
if (wr) {
DPRINTK("SYNC EXIT (after calling via_dsp_drain_dac)\n");
return via_dsp_drain_dac (card, file->f_flags & O_NONBLOCK);
}
break;
/* stop recording/playback immediately */
case SNDCTL_DSP_RESET:
spin_lock_irq (&card->lock);
if (rd) {
via_chan_clear (&card->ch_in);
via_chan_pcm_fmt (card, &card->ch_in, 1);
}
if (wr) {
via_chan_clear (&card->ch_out);
via_chan_pcm_fmt (card, &card->ch_out, 1);
}
spin_unlock_irq (&card->lock);
DPRINTK("RESET EXIT, returning 0\n");
return 0;
/* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
case SNDCTL_DSP_GETCAPS:
DPRINTK("GETCAPS EXIT\n");
return put_user(DSP_CAP_REVISION, (int *)arg);
/* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
case SNDCTL_DSP_GETBLKSIZE:
DPRINTK("GETBLKSIZE EXIT\n");
return put_user(VIA_DMA_BUF_SIZE, (int *)arg);
/* obtain information about input buffering */
case SNDCTL_DSP_GETISPACE:
DPRINTK("GETISPACE EXIT\n");
return via_dsp_ioctl_space (card, &card->ch_in, (void*) arg);
/* obtain information about output buffering */
case SNDCTL_DSP_GETOSPACE:
DPRINTK("GETOSPACE EXIT\n");
return via_dsp_ioctl_space (card, &card->ch_out, (void*) arg);
/* return number of bytes remaining to be played by DMA engine */
case SNDCTL_DSP_GETODELAY:
{
int n;
n = atomic_read (&card->ch_out.next_buf) -
atomic_read (&card->ch_out.buf_in_use);
assert (n >= 0);
if (n == 0)
val = 0;
else {
val = (n - 1) * VIA_DMA_BUF_SIZE;
val += inl (card->ch_out.iobase + VIA_BASE0_PCM_OUT_BLOCK_COUNT);
}
DPRINTK("GETODELAY EXIT, val = %d bytes\n", val);
return put_user (val, (int *)arg);
}
/* set fragment size. implemented as a successful no-op for now */
case SNDCTL_DSP_SETFRAGMENT:
get_user_ret(val, (int *)arg, -EFAULT);
DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
val & 0xFFFF,
val & 0xFFFF,
(val >> 16) & 0xFFFF,
(val >> 16) & 0xFFFF);
/* just to shut up some programs */
return 0;
/* inform device of an upcoming pause in input (or output). not implemented */
case SNDCTL_DSP_POST:
DPRINTK("POST EXIT (null ioctl, returning -EINVAL)\n");
return -EINVAL;
/* not implemented */
default:
DPRINTK ("unhandled ioctl\n");
break;
}
DPRINTK("EXIT, returning %d\n", rc);
return rc;
}
static int via_dsp_open (struct inode *inode, struct file *file)
{
int open_mode, rc = -EINVAL, minor = MINOR(inode->i_rdev);
int got_read_chan = 0, is_busy;
struct via_info *card;
struct pci_dev *pdev;
struct pci_driver *drvr;
unsigned long flags;
DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
if (file->f_mode & FMODE_READ) /* no input ATM */
goto err_out;
card = NULL;
pci_for_each_dev(pdev) {
drvr = pci_dev_driver (pdev);
if (drvr == &via_driver) {
assert (pdev->driver_data != NULL);
card = pdev->driver_data;
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");
rc = -ENODEV;
goto err_out;
match:
file->private_data = card;
/* wait for device to become free */
spin_lock_irqsave (&card->lock, flags);
open_mode = card->open_mode;
if (open_mode & file->f_mode)
is_busy = 1;
else {
is_busy = 0;
card->open_mode |= file->f_mode;
open_mode = card->open_mode;
}
spin_unlock_irqrestore (&card->lock, flags);
if (is_busy) {
rc = -EBUSY;
goto err_out;
}
DPRINTK("open_mode now 0x%x\n", open_mode);
/* handle input from analog source */
if (file->f_mode & FMODE_READ) {
rc = via_chan_init (card, &card->ch_in, 0x10);
if (rc)
goto err_out_clear_mode;
got_read_chan = 1;
/* why is this forced to 16-bit stereo in all drivers? */
card->ch_in.pcm_fmt =
VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
spin_lock_irqsave (&card->lock, flags);
via_chan_pcm_fmt (card, &card->ch_out, 0);
spin_unlock_irqrestore (&card->lock, flags);
via_set_adc_rate (card, 8000);
}
/* handle output to analog source */
if (file->f_mode & FMODE_WRITE) {
rc = via_chan_init (card, &card->ch_out, 0x00);
if (rc)
goto err_out_clear_mode;
if ((minor & 0xf) == SND_DEV_DSP16)
card->ch_out.pcm_fmt |= VIA_PCM_FMT_16BIT;
spin_lock_irqsave (&card->lock, flags);
via_chan_pcm_fmt (card, &card->ch_out, 0);
spin_unlock_irqrestore (&card->lock, flags);
via_set_dac_rate (card, 8000);
}
DPRINTK ("EXIT, returning 0\n");
return 0;
err_out_clear_mode:
if (got_read_chan)
via_chan_free (card, &card->ch_in);
spin_lock_irqsave (&card->lock, flags);
card->open_mode &= ~file->f_mode;
spin_unlock_irqrestore (&card->lock, flags);
err_out:
DPRINTK("ERROR EXIT, returning %d\n", rc);
return rc;
}
static int via_dsp_release(struct inode *inode, struct file *file)
{
struct via_info *card;
unsigned long flags;
DPRINTK ("ENTER\n");
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
if (file->f_mode & FMODE_READ)
via_chan_free (card, &card->ch_in);
if (file->f_mode & FMODE_WRITE) {
via_dsp_drain_dac (card, file->f_flags & O_NONBLOCK);
via_chan_free (card, &card->ch_out);
}
spin_lock_irqsave (&card->lock, flags);
card->open_mode &= ~(file->f_mode);
spin_unlock_irqrestore (&card->lock, flags);
wake_up (&card->open_wait);
DPRINTK("EXIT, returning 0\n");
return 0;
}
#ifdef VIA_PROC_FS
/****************************************************************
*
* /proc/driver/via/info
*
*
*/
static int via_info_read_proc (char *page, char **start, off_t off,
int count, int *eof, void *data)
{
#define YN(val,bit) (((val) & (bit)) ? "yes" : "no")
#define ED(val,bit) (((val) & (bit)) ? "enable" : "disable")
int len = 0;
u8 r40, r41, r42, r44;
struct via_info *card = data;
DPRINTK ("ENTER\n");
assert (card != NULL);
len += sprintf (page+len, VIA_CARD_NAME "\n\n");
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, 0x44, &r44);
len += sprintf (page+len,
"Via 82Cxxx PCI registers:\n"
"\n"
"40 Codec Ready: %s\n"
" Codec Low-power: %s\n"
" Secondary Codec Ready: %s\n"
"\n"
"41 Interface Enable: %s\n"
" De-Assert Reset: %s\n"
" Force SYNC high: %s\n"
" Force SDO high: %s\n"
" Variable Sample Rate On-Demand Mode: %s\n"
" SGD Read Channel PCM Data Out: %s\n"
" FM Channel PCM Data Out: %s\n"
" SB PCM Data Out: %s\n"
"\n"
"42 Game port enabled: %s\n"
" SoundBlaster enabled: %s\n"
" FM enabled: %s\n"
" MIDI enabled: %s\n"
"\n"
"44 AC-Link Interface Access: %s\n"
" Secondary Codec Support: %s\n"
"\n",
YN (r40, VIA_CR40_AC97_READY),
YN (r40, VIA_CR40_AC97_LOW_POWER),
YN (r40, VIA_CR40_SECONDARY_READY),
ED (r41, VIA_CR41_AC97_ENABLE),
YN (r41, (1 << 6)),
YN (r41, (1 << 5)),
YN (r41, (1 << 4)),
ED (r41, (1 << 3)),
ED (r41, (1 << 2)),
ED (r41, (1 << 1)),
ED (r41, (1 << 0)),
YN (r42, VIA_CR42_GAME_ENABLE),
YN (r42, VIA_CR42_SB_ENABLE),
YN (r42, VIA_CR42_FM_ENABLE),
YN (r42, VIA_CR42_MIDI_ENABLE),
YN (r44, VIA_CR44_AC_LINK_ACCESS),
YN (r44, VIA_CR44_SECOND_CODEC_SUPPORT)
);
DPRINTK("EXIT, returning %d\n", len);
return len;
#undef YN
#undef ED
}
/****************************************************************
*
* /proc/driver/via/... setup and cleanup
*
*
*/
static int __init via_init_proc (void)
{
DPRINTK ("ENTER\n");
if (!proc_mkdir ("driver/via", 0))
return -EIO;
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static void via_cleanup_proc (void)
{
DPRINTK ("ENTER\n");
remove_proc_entry ("driver/via", NULL);
DPRINTK ("EXIT\n");
}
static int __init via_card_init_proc (struct via_info *card)
{
char s[32];
int rc;
DPRINTK ("ENTER\n");
sprintf (s, "driver/via/%d", card->card_num);
if (!proc_mkdir (s, 0)) {
rc = -EIO;
goto err_out_none;
}
sprintf (s, "driver/via/%d/info", card->card_num);
if (!create_proc_read_entry (s, 0, 0, via_info_read_proc, card)) {
rc = -EIO;
goto err_out_dir;
}
sprintf (s, "driver/via/%d/ac97", card->card_num);
if (!create_proc_read_entry (s, 0, 0, ac97_read_proc, &card->ac97)) {
rc = -EIO;
goto err_out_info;
}
DPRINTK ("EXIT, returning 0\n");
return 0;
err_out_info:
sprintf (s, "driver/via/%d/info", card->card_num);
remove_proc_entry (s, NULL);
err_out_dir:
sprintf (s, "driver/via/%d", card->card_num);
remove_proc_entry (s, NULL);
err_out_none:
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static void via_card_cleanup_proc (struct via_info *card)
{
char s[32];
DPRINTK ("ENTER\n");
sprintf (s, "driver/via/%d/ac97", card->card_num);
remove_proc_entry (s, NULL);
sprintf (s, "driver/via/%d/info", card->card_num);
remove_proc_entry (s, NULL);
sprintf (s, "driver/via/%d", card->card_num);
remove_proc_entry (s, NULL);
DPRINTK ("EXIT\n");
}
#else
static inline int via_init_proc (void) { return 0; }
static inline void via_cleanup_proc (void) {}
static inline int via_card_init_proc (struct via_info *card) { return 0; }
static inline void via_card_cleanup_proc (struct via_info *card) {}
#endif /* VIA_PROC_FS */
/****************************************************************
*
* Chip setup and kernel registration
*
*
*/
static int __init via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
{
int rc;
struct via_info *card;
u8 tmp;
static int printed_version = 0;
DPRINTK ("ENTER\n");
if (printed_version++ == 0)
printk (KERN_INFO "Via 686a audio driver " VIA_VERSION "\n");
if (!request_region (pci_resource_start (pdev, 0),
pci_resource_len (pdev, 0),
VIA_MODULE_NAME)) {
printk (KERN_ERR PFX "unable to obtain I/O resources, aborting\n");
rc = -EBUSY;
goto err_out;
}
if (pci_enable_device (pdev)) {
rc = -EIO;
goto err_out_none;
}
card = kmalloc (sizeof (*card), GFP_KERNEL);
if (!card) {
printk (KERN_ERR PFX "out of memory, aborting\n");
rc = -ENOMEM;
goto err_out_none;
}
pdev->driver_data = 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);
init_waitqueue_head(&card->open_wait);
/* 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;
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;
}
/*
* 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;
}
/*
* per-card /proc info
*/
rc = via_card_init_proc (card);
if (rc) {
printk (KERN_ERR PFX "card-specific /proc init failed, aborting\n");
goto err_out_have_dsp;
}
/*
* 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_proc;
}
pci_read_config_byte (pdev, 0x3C, &tmp);
if ((tmp & 0x0F) != pdev->irq) {
printk (KERN_WARNING PFX "IRQ fixup, 0x3C==0x%02X\n", tmp);
tmp &= 0xF0;
tmp |= pdev->irq;
pci_write_config_byte (pdev, 0x3C, tmp);
DPRINTK("new 0x3c==0x%02x\n", tmp);
} else {
DPRINTK("IRQ reg 0x3c==0x%02x, irq==%d\n",
tmp, tmp & 0x0F);
}
printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
card->card_num + 1, card->baseaddr, pdev->irq);
DPRINTK ("EXIT, returning 0\n");
return 0;
err_out_have_proc:
via_card_cleanup_proc (card);
err_out_have_dsp:
via_dsp_cleanup (card);
err_out_have_mixer:
via_ac97_cleanup (card);
err_out_kfree:
#ifndef VIA_NDEBUG
memset (card, 0xAB, sizeof (*card)); /* poison memory */
#endif
kfree (card);
err_out_none:
release_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0));
err_out:
pdev->driver_data = NULL;
DPRINTK ("EXIT - returning %d\n", rc);
return rc;
}
static void __exit via_remove_one (struct pci_dev *pdev)
{
struct via_info *card;
DPRINTK ("ENTER\n");
assert (pdev != NULL);
card = pdev->driver_data;
assert (card != NULL);
via_interrupt_cleanup (card);
via_card_cleanup_proc (card);
via_dsp_cleanup (card);
via_ac97_cleanup (card);
release_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0));
#ifndef VIA_NDEBUG
memset (card, 0xAB, sizeof (*card)); /* poison memory */
#endif
kfree (card);
pdev->driver_data = NULL;
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 = via_init_proc ();
if (rc) {
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
rc = pci_register_driver (&via_driver);
if (rc < 1) {
if (rc == 0)
pci_unregister_driver (&via_driver);
via_cleanup_proc ();
DPRINTK ("EXIT, returning -ENODEV\n");
return -ENODEV;
}
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static void __exit cleanup_via82cxxx_audio(void)
{
DPRINTK("ENTER\n");
pci_unregister_driver (&via_driver);
via_cleanup_proc ();
DPRINTK("EXIT\n");
}
module_init(init_via82cxxx_audio);
module_exit(cleanup_via82cxxx_audio);
|