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/*
* Support for VIA 82Cxxx Audio Codecs
* Copyright 1999,2000 Jeff Garzik
*
* 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".
*
*/
#define VIA_VERSION "1.9.1"
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/sound.h>
#include <linux/poll.h>
#include <linux/soundcard.h>
#include <linux/ac97_codec.h>
#include <linux/smp_lock.h>
#include <linux/ioport.h>
#include <linux/wrapper.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
#include <asm/semaphore.h>
#include "sound_config.h"
#include "dev_table.h"
#include "mpu401.h"
#undef VIA_DEBUG /* define to enable debugging output and checks */
#ifdef VIA_DEBUG
/* note: prints function name for you */
#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
#else
#define DPRINTK(fmt, args...)
#endif
#undef VIA_NDEBUG /* define to disable lightweight runtime checks */
#ifdef VIA_NDEBUG
#define assert(expr)
#else
#define assert(expr) \
if(!(expr)) { \
printk( "Assertion failed! %s,%s,%s,line=%d\n", \
#expr,__FILE__,__FUNCTION__,__LINE__); \
}
#endif
#if defined(CONFIG_PROC_FS) && \
defined(CONFIG_SOUND_VIA82CXXX_PROCFS)
#define VIA_PROC_FS 1
#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
#define VIA_MAX_FRAG_SIZE PAGE_SIZE
#define VIA_MIN_FRAG_SIZE 64
#define VIA_MIN_FRAG_NUMBER 2
/* 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_TABLE_ADDR 0x04
#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
#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)
/* 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;
u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
unsigned rate; /* sample rate */
unsigned int frag_size;
unsigned int frag_number;
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 lock;
int card_num; /* unique card number, from 0 */
int dev_dsp; /* /dev/dsp index from register_sound_dsp() */
unsigned rev_h : 1;
int locked_rate : 1;
struct semaphore syscall_sem;
struct semaphore open_sem;
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 = 0;
/****************************************************************
*
* 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 *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 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);
#ifdef VIA_PROC_FS
static int via_init_proc (void);
static void via_cleanup_proc (void);
static int via_card_init_proc (struct via_info *card);
static void via_card_cleanup_proc (struct via_info *card);
#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
/****************************************************************
*
* 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, },
{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_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: __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)
{
outb (VIA_SGD_START, 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;
}
/****************************************************************
*
* Miscellaneous debris
*
*
*/
/**
* via_syscall_down - down the card-specific syscell semaphore
* @card: Private info for specified board
* @nonblock: boolean, non-zero if O_NONBLOCK is set
*
* Encapsulates standard method of acquiring the syscall sem.
*
* Returns negative errno on error, or zero for success.
*/
static inline int via_syscall_down (struct via_info *card, int nonblock)
{
/* Thomas Sailer:
* EAGAIN is supposed to be used if IO is pending,
* not if there is contention on some internal
* synchronization primitive which should be
* held only for a short time anyway
*/
nonblock = 0;
if (nonblock) {
if (down_trylock (&card->syscall_sem))
return -EAGAIN;
} else {
if (down_interruptible (&card->syscall_sem))
return -ERESTARTSYS;
}
return 0;
}
/**
* via_stop_everything - Stop all audio operations
* @card: Private info for specified board
*
* Stops all DMA operations and interrupts, and clear
* any pending status bits resulting from those operations.
*/
static void via_stop_everything (struct via_info *card)
{
u8 tmp, new_tmp;
DPRINTK ("ENTER\n");
assert (card != NULL);
/*
* terminate any existing operations on audio read/write channels
*/
via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
/*
* 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
*/
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);
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;
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;
via_ac97_write_reg (ac97, AC97_POWER_CONTROL,
(via_ac97_read_reg (ac97, AC97_POWER_CONTROL) & ~0x0200) |
0x0200);
via_ac97_write_reg (ac97, rate_reg, rate);
via_ac97_write_reg (ac97, AC97_POWER_CONTROL,
via_ac97_read_reg (ac97, AC97_POWER_CONTROL) & ~0x0200);
udelay (10);
/* 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 (chan == &card->ch_out) {
chan->name = "PCM-OUT";
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 in
* 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");
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);
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();
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;
/* 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;
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;
via_chan_pcm_fmt (chan, 0);
break;
/* stereo */
case 2:
chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
via_chan_pcm_fmt (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;
}
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->pcm_fmt & VIA_PCM_FMT_STEREO) ? 2 : 1) *
((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 * 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 displayed
*
* 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));
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;
/* 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);
return data & 0x0000FFFF;
}
printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\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 (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:
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 (pci_get_drvdata (pdev) != NULL);
card = pci_get_drvdata (pdev);
if (card->ac97.dev_mixer == minor)
goto match;
}
}
DPRINTK ("EXIT, returning -ENODEV\n");
return -ENODEV;
match:
file->private_data = &card->ac97;
DPRINTK ("EXIT, returning 0\n");
return 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;
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;
rc = codec->mixer_ioctl(codec, cmd, arg);
up (&card->syscall_sem);
out:
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static struct file_operations via_mixer_fops = {
owner: THIS_MODULE,
open: via_mixer_open,
llseek: no_llseek,
ioctl: via_mixer_ioctl,
};
static int __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,
* 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 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 __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.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");
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;
}
/* 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);
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
*
*/
/**
* via_intr_channel - handle an interrupt for a single channel
* @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_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;
if (chan->bytes < 0) /* handle overflow of 31-bit value */
chan->bytes = chan->frag_size;
/* wake up anyone listening to see when interrupts occur */
if (waitqueue_active (&chan->wait))
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));
/* all following checks only occur when not in mmap(2) mode */
if (chan->is_mapped)
return;
/* 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);
}
DPRINTK ("%s intr, channel n_frags == %d\n", chan->name,
atomic_read (&chan->n_frags));
}
static void via_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct via_info *card = dev_id;
u32 status32;
/* to minimize interrupt sharing costs, we use the SGD status
* shadow register to check the status of all inputs and
* outputs with a single 32-bit bus read. If no interrupt
* conditions are flagged, we exit immediately
*/
status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
if (!(status32 & VIA_INTR_MASK))
{
#ifdef CONFIG_MIDI_VIA82CXXX
if (card->midi_devc)
uart401intr(irq, card->midi_devc, regs);
#endif
return;
}
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->ch_out);
if (status32 & VIA_INTR_IN)
via_intr_channel (&card->ch_in);
if (status32 & VIA_INTR_FM)
via_intr_channel (&card->ch_fm);
spin_unlock (&card->lock);
}
/**
* 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;
}
/* make sure FM irq is not routed to us */
pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
}
if (request_irq (card->pdev->irq, via_interrupt, SA_SHIRQ, VIA_MODULE_NAME, card)) {
printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
card->pdev->irq);
DPRINTK ("EXIT, returning -EBUSY\n");
return -EBUSY;
}
DPRINTK ("EXIT, returning 0\n");
return 0;
}
/****************************************************************
*
* OSS DSP device
*
*/
static struct file_operations via_dsp_fops = {
owner: THIS_MODULE,
open: via_dsp_open,
release: via_dsp_release,
read: via_dsp_read,
write: via_dsp_write,
poll: via_dsp_poll,
llseek: no_llseek,
ioctl: via_dsp_ioctl,
mmap: via_dsp_mmap,
};
static int __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);
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 write_access)
{
struct via_info *card = vma->vm_private_data;
struct via_channel *chan = &card->ch_out;
struct page *dmapage;
unsigned long pgoff;
int rd, wr;
DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh, wr %d\n",
vma->vm_start,
address - vma->vm_start,
(address - vma->vm_start) >> PAGE_SHIFT,
address,
write_access);
if (address > vma->vm_end) {
DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
return NOPAGE_SIGBUS; /* Disallow mremap */
}
if (!card) {
DPRINTK ("EXIT, returning NOPAGE_OOM\n");
return NOPAGE_OOM; /* Nothing allocated */
}
pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
rd = card->ch_in.is_mapped;
wr = card->ch_out.is_mapped;
#ifndef VIA_NDEBUG
{
unsigned long max_bufs = chan->frag_number;
if (rd && wr) max_bufs *= 2;
/* via_dsp_mmap() should ensure this */
assert (pgoff < max_bufs);
}
#endif
/* if full-duplex (read+write) and we have two sets of bufs,
* then the playback buffers come first, sez soundcard.c */
if (pgoff >= chan->page_number) {
pgoff -= chan->page_number;
chan = &card->ch_in;
} else if (!wr)
chan = &card->ch_in;
assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
get_page (dmapage);
return dmapage;
}
#ifndef VM_RESERVED
static int via_mm_swapout (struct page *page, struct file *filp)
{
return 0;
}
#endif /* VM_RESERVED */
struct vm_operations_struct via_mm_ops = {
nopage: via_mm_nopage,
#ifndef VM_RESERVED
swapout: via_mm_swapout,
#endif
};
static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
{
struct via_info *card;
int nonblock = (file->f_flags & O_NONBLOCK);
int rc = -EINVAL, rd=0, wr=0;
unsigned long max_size, size, start, offset;
assert (file != NULL);
assert (vma != NULL);
card = file->private_data;
assert (card != NULL);
DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
vma->vm_start,
vma->vm_end - vma->vm_start,
vma->vm_pgoff);
max_size = 0;
if (vma->vm_flags & VM_READ) {
rd = 1;
via_chan_set_buffering(card, &card->ch_in, -1);
via_chan_buffer_init (card, &card->ch_in);
max_size += card->ch_in.page_number << PAGE_SHIFT;
}
if (vma->vm_flags & VM_WRITE) {
wr = 1;
via_chan_set_buffering(card, &card->ch_out, -1);
via_chan_buffer_init (card, &card->ch_out);
max_size += card->ch_out.page_number << PAGE_SHIFT;
}
start = vma->vm_start;
offset = (vma->vm_pgoff << PAGE_SHIFT);
size = vma->vm_end - vma->vm_start;
/* some basic size/offset sanity checks */
if (size > max_size)
goto out;
if (offset > max_size - size)
goto out;
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
vma->vm_ops = &via_mm_ops;
vma->vm_private_data = card;
#ifdef VM_RESERVED
vma->vm_flags |= VM_RESERVED;
#endif
if (rd)
card->ch_in.is_mapped = 1;
if (wr)
card->ch_out.is_mapped = 1;
up (&card->syscall_sem);
rc = 0;
out:
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static ssize_t via_dsp_do_read (struct via_info *card,
char *userbuf, size_t count,
int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
const char *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 (current->need_resched) {
up(&card->syscall_sem);
schedule ();
ret = via_syscall_down (card, nonblock);
if (ret)
goto out;
}
/* grab current channel software pointer. In the case of
* recording, this is pointing to the next buffer that
* will receive data from the audio hardware.
*/
n = chan->sw_ptr;
/* n_frags represents the number of fragments waiting
* to be copied to userland. sleep until at least
* one buffer has been read from the audio hardware.
*/
add_wait_queue(&chan->wait, &wait);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
tmp = atomic_read (&chan->n_frags);
assert (tmp >= 0);
assert (tmp <= chan->frag_number);
if (tmp)
break;
if (nonblock || !chan->is_active) {
ret = -EAGAIN;
break;
}
up(&card->syscall_sem);
DPRINTK ("Sleeping on block %d\n", n);
schedule();
ret = via_syscall_down (card, nonblock);
if (ret)
break;
if (signal_pending (current)) {
ret = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&chan->wait, &wait);
if (ret)
goto out;
/* Now that we have a buffer we can read from, send
* as much as sample data possible to userspace.
*/
while ((count > 0) && (chan->slop_len < chan->frag_size)) {
size_t slop_left = chan->frag_size - chan->slop_len;
void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
unsigned ofs = n % (PAGE_SIZE / chan->frag_size);
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 *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);
assert (buffer != NULL);
card = file->private_data;
assert (card != NULL);
if (ppos != &file->f_pos) {
DPRINTK ("EXIT, returning -ESPIPE\n");
return -ESPIPE;
}
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
if (card->ch_in.is_mapped) {
rc = -ENXIO;
goto out_up;
}
via_chan_set_buffering(card, &card->ch_in, -1);
rc = via_chan_buffer_init (card, &card->ch_in);
if (rc)
goto out_up;
rc = via_dsp_do_read (card, buffer, count, nonblock);
out_up:
up (&card->syscall_sem);
out:
DPRINTK ("EXIT, returning %ld\n",(long) rc);
return rc;
}
static ssize_t via_dsp_do_write (struct via_info *card,
const char *userbuf, size_t count,
int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
const char *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 (current->need_resched) {
up(&card->syscall_sem);
schedule ();
ret = via_syscall_down (card, nonblock);
if (ret)
goto out;
}
/* grab current channel fragment pointer. In the case of
* playback, this is pointing to the next fragment that
* should receive data from userland.
*/
n = chan->sw_ptr;
/* n_frags represents the number of fragments remaining
* to be filled by userspace. Sleep until
* at least one fragment is available for our use.
*/
add_wait_queue(&chan->wait, &wait);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
tmp = atomic_read (&chan->n_frags);
assert (tmp >= 0);
assert (tmp <= chan->frag_number);
if (tmp)
break;
if (nonblock || !chan->is_active) {
ret = -EAGAIN;
break;
}
up(&card->syscall_sem);
DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
schedule();
ret = via_syscall_down (card, nonblock);
if (ret)
break;
if (signal_pending (current)) {
ret = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&chan->wait, &wait);
if (ret)
goto out;
/* Now that we have at least one fragment we can write to, fill the buffer
* as much as possible with data from userspace.
*/
while ((count > 0) && (chan->slop_len < chan->frag_size)) {
size_t slop_left = chan->frag_size - chan->slop_len;
size = (count < slop_left) ? count : slop_left;
if (copy_from_user (chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size + chan->slop_len,
userbuf, size)) {
ret = -EFAULT;
goto out;
}
count -= size;
chan->slop_len += size;
userbuf += size;
}
/* If we didn't fill up the buffer with data, stop now.
* Put a 'stop' marker in the DMA table too, to tell the
* audio hardware to stop if it gets here.
*/
if (chan->slop_len < chan->frag_size) {
sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
goto out;
}
/*
* If we get to this point, we have filled a buffer with
* audio data, flush the buffer to audio hardware.
*/
/* Record the true size for the audio hardware to notice */
if (n == (chan->frag_number - 1))
sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
else
sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
/* advance channel software pointer to point to
* the next buffer we will fill with data
*/
if (chan->sw_ptr == (chan->frag_number - 1))
chan->sw_ptr = 0;
else
chan->sw_ptr++;
/* mark one less buffer as being available for userspace consumption */
assert (atomic_read (&chan->n_frags) > 0);
atomic_dec (&chan->n_frags);
/* we are at a block boundary, there is no fragment data */
chan->slop_len = 0;
/* if SGD has not yet been started, start it */
via_chan_maybe_start (chan);
DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
n, chan->sw_ptr, atomic_read (&chan->n_frags));
DPRINTK ("regs==%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;
}
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;
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);
assert (buffer != NULL);
card = file->private_data;
assert (card != NULL);
if (ppos != &file->f_pos) {
DPRINTK ("EXIT, returning -ESPIPE\n");
return -ESPIPE;
}
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
if (card->ch_out.is_mapped) {
rc = -ENXIO;
goto out_up;
}
via_chan_set_buffering(card, &card->ch_out, -1);
rc = via_chan_buffer_init (card, &card->ch_out);
if (rc)
goto out_up;
rc = via_dsp_do_write (card, buffer, count, nonblock);
out_up:
up (&card->syscall_sem);
out:
DPRINTK ("EXIT, returning %ld\n",(long) rc);
return rc;
}
static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
{
struct via_info *card;
struct via_channel *chan;
unsigned int mask = 0;
DPRINTK ("ENTER\n");
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
if (file->f_mode & FMODE_READ) {
chan = &card->ch_in;
if (sg_active (chan->iobase))
poll_wait(file, &chan->wait, wait);
if (atomic_read (&chan->n_frags) > 0)
mask |= POLLIN | POLLRDNORM;
}
if (file->f_mode & FMODE_WRITE) {
chan = &card->ch_out;
if (sg_active (chan->iobase))
poll_wait(file, &chan->wait, wait);
if (atomic_read (&chan->n_frags) > 0)
mask |= POLLOUT | POLLWRNORM;
}
DPRINTK ("EXIT, returning %u\n", mask);
return mask;
}
/**
* via_dsp_drain_playback - sleep until all playback samples are flushed
* @card: Private info for specified board
* @chan: Channel to drain
* @nonblock: boolean, non-zero if O_NONBLOCK is set
*
* Sleeps until all playback has been flushed to the audio
* hardware.
*
* Locking: inside card->syscall_sem
*/
static int via_dsp_drain_playback (struct via_info *card,
struct via_channel *chan, int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
int ret = 0;
DPRINTK ("ENTER, nonblock = %d\n", nonblock);
if (chan->slop_len > 0)
via_chan_flush_frag (chan);
if (atomic_read (&chan->n_frags) == chan->frag_number)
goto out;
via_chan_maybe_start (chan);
add_wait_queue(&chan->wait, &wait);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
if (atomic_read (&chan->n_frags) >= chan->frag_number)
break;
if (nonblock) {
DPRINTK ("EXIT, returning -EAGAIN\n");
ret = -EAGAIN;
break;
}
#ifdef VIA_DEBUG
{
u8 r40,r41,r42,r43,r44,r48;
pci_read_config_byte (card->pdev, 0x40, &r40);
pci_read_config_byte (card->pdev, 0x41, &r41);
pci_read_config_byte (card->pdev, 0x42, &r42);
pci_read_config_byte (card->pdev, 0x43, &r43);
pci_read_config_byte (card->pdev, 0x44, &r44);
pci_read_config_byte (card->pdev, 0x48, &r48);
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
r40,r41,r42,r43,r44,r48);
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
}
if (!chan->is_active)
printk (KERN_ERR "sleeping but not active\n");
#endif
up(&card->syscall_sem);
DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
schedule();
if ((ret = via_syscall_down (card, nonblock)))
break;
if (signal_pending (current)) {
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
ret = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&chan->wait, &wait);
#ifdef VIA_DEBUG
{
u8 r40,r41,r42,r43,r44,r48;
pci_read_config_byte (card->pdev, 0x40, &r40);
pci_read_config_byte (card->pdev, 0x41, &r41);
pci_read_config_byte (card->pdev, 0x42, &r42);
pci_read_config_byte (card->pdev, 0x43, &r43);
pci_read_config_byte (card->pdev, 0x44, &r44);
pci_read_config_byte (card->pdev, 0x48, &r48);
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
r40,r41,r42,r43,r44,r48);
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
}
#endif
out:
DPRINTK ("EXIT, returning %d\n", ret);
return ret;
}
/**
* via_dsp_ioctl_space - get information about channel buffering
* @card: Private info for specified board
* @chan: pointer to channel-specific info
* @arg: user buffer for returned information
*
* Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
*
* Locking: inside card->syscall_sem
*/
static int via_dsp_ioctl_space (struct via_info *card,
struct via_channel *chan,
void *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));
}
/**
* via_dsp_ioctl_ptr - get information about hardware buffer ptr
* @card: Private info for specified board
* @chan: pointer to channel-specific info
* @arg: user buffer for returned information
*
* Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
*
* Locking: inside card->syscall_sem
*/
static int via_dsp_ioctl_ptr (struct via_info *card,
struct via_channel *chan,
void *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 - inl (chan->iobase + VIA_PCM_BLOCK_COUNT);
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));
}
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);
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, (int *)arg);
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, (int *)arg);
break;
/* query or set current channel's PCM data format */
case SNDCTL_DSP_SETFMT:
if (get_user(val, (int *)arg)) {
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, (int *)arg);
break;
/* query or set number of channels (1=mono, 2=stereo) */
case SNDCTL_DSP_CHANNELS:
if (get_user(val, (int *)arg)) {
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 && (card->ch_in.pcm_fmt & VIA_PCM_FMT_STEREO)) ||
(wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_STEREO)))
val = 2;
else
val = 1;
}
DPRINTK ("CHANNELS EXIT, returning %d\n", val);
rc = put_user (val, (int *)arg);
break;
/* enable (val is not zero) or disable (val == 0) stereo */
case SNDCTL_DSP_STEREO:
if (get_user(val, (int *)arg)) {
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, (int *) arg);
break;
/* query or set sampling rate */
case SNDCTL_DSP_SPEED:
if (get_user(val, (int *)arg)) {
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, (int *)arg);
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, (int *)arg);
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, (int *)arg);
} else if (wr) {
via_chan_set_buffering(card, &card->ch_out, -1);
rc = put_user(card->ch_out.frag_size, (int *)arg);
}
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, (void*) arg);
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, (void*) arg);
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, (void*) arg);
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, (void*) arg);
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);
if (val > 0) {
val *= chan->frag_size;
val -= chan->frag_size -
inl (chan->iobase + VIA_PCM_BLOCK_COUNT);
}
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, (int *)arg);
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, (int *)arg)) {
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, (int *)arg);
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, (int *)arg)) {
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, (void*) arg);
break;
}
up (&card->syscall_sem);
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static int via_dsp_open (struct inode *inode, struct file *file)
{
int minor = MINOR(inode->i_rdev);
struct via_info *card;
struct pci_dev *pdev;
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;
pci_for_each_dev(pdev) {
drvr = pci_dev_driver (pdev);
if (drvr == &via_driver) {
assert (pci_get_drvdata (pdev) != NULL);
card = pci_get_drvdata (pdev);
DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
card->dev_dsp, minor,
(card->dev_dsp ^ minor) & ~0xf);
if (((card->dev_dsp ^ minor) & ~0xf) == 0)
goto match;
}
}
DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
return -ENODEV;
match:
if (nonblock) {
if (down_trylock (&card->open_sem)) {
DPRINTK ("EXIT, returning -EAGAIN\n");
return -EAGAIN;
}
} else {
if (down_interruptible (&card->open_sem)) {
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
return -ERESTARTSYS;
}
}
file->private_data = card;
DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
/* handle input from analog source */
if (file->f_mode & FMODE_READ) {
chan = &card->ch_in;
via_chan_init (card, chan);
/* why is this forced to 16-bit stereo in all drivers? */
chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
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;
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 0;
}
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)
printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
via_chan_free (card, &card->ch_out);
via_chan_buffer_free(card, &card->ch_out);
}
if (file->f_mode & FMODE_READ) {
via_chan_free (card, &card->ch_in);
via_chan_buffer_free (card, &card->ch_in);
}
up (&card->syscall_sem);
up (&card->open_sem);
DPRINTK ("EXIT, returning 0\n");
return 0;
}
/****************************************************************
*
* Chip setup and kernel registration
*
*
*/
static int __init 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 = 0;
DPRINTK ("ENTER\n");
if (printed_version++ == 0)
printk (KERN_INFO "Via 686a 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;
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);
init_MUTEX (&card->syscall_sem);
init_MUTEX (&card->open_sem);
/* we must init these now, in case the intr handler needs them */
via_chan_init_defaults (card, &card->ch_out);
via_chan_init_defaults (card, &card->ch_in);
via_chan_init_defaults (card, &card->ch_fm);
/* if BAR 2 is present, chip is Rev H or later,
* which means it has a few extra features */
if (pci_resource_start (pdev, 2) > 0)
card->rev_h = 1;
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;
}
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;
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_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_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_card_cleanup_proc (card);
via_dsp_cleanup (card);
via_ac97_cleanup (card);
#ifndef VIA_NDEBUG
memset (card, 0xAB, sizeof (*card)); /* poison memory */
#endif
kfree (card);
pci_set_drvdata (pdev, NULL);
pci_release_regions (pdev);
pci_disable_device (pdev);
pci_set_power_state (pdev, 3); /* ...zzzzzz */
DPRINTK ("EXIT\n");
return;
}
/****************************************************************
*
* Driver initialization and cleanup
*
*
*/
static int __init init_via82cxxx_audio(void)
{
int rc;
DPRINTK ("ENTER\n");
rc = 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);
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
MODULE_LICENSE("GPL");
EXPORT_NO_SYMBOLS;
#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");
}
#endif /* VIA_PROC_FS */
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