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linux/sound/oss/via82cxxx_audio.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* Support for VIA 82Cxxx Audio Codecs
* Copyright 1999,2000 Jeff Garzik
*
* Updated to support the VIA 8233/8235 audio subsystem
* Alan Cox <alan@redhat.com> (C) Copyright 2002, 2003 Red Hat Inc
*
* Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
* See the "COPYING" file distributed with this software for more info.
* NO WARRANTY
*
* For a list of known bugs (errata) and documentation,
* see via-audio.pdf in Documentation/DocBook.
* If this documentation does not exist, run "make pdfdocs".
*/
#define VIA_VERSION "1.9.1-ac4-2.5"
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/poison.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/sound.h>
#include <linux/poll.h>
#include <linux/soundcard.h>
#include <linux/ac97_codec.h>
#include <linux/smp_lock.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/mutex.h>
#include "sound_config.h"
#include "dev_table.h"
#include "mpu401.h"
#undef VIA_DEBUG /* define to enable debugging output and checks */
#ifdef VIA_DEBUG
/* note: prints function name for you */
#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
#else
#define DPRINTK(fmt, args...)
#endif
#undef VIA_NDEBUG /* define to disable lightweight runtime checks */
#ifdef VIA_NDEBUG
#define assert(expr)
#else
#define assert(expr) \
if(!(expr)) { \
printk( "Assertion failed! %s,%s,%s,line=%d\n", \
#expr,__FILE__,__FUNCTION__,__LINE__); \
}
#endif
#define VIA_SUPPORT_MMAP 1 /* buggy, for now... */
#define MAX_CARDS 1
#define VIA_CARD_NAME "VIA 82Cxxx Audio driver " VIA_VERSION
#define VIA_MODULE_NAME "via82cxxx"
#define PFX VIA_MODULE_NAME ": "
#define VIA_COUNTER_LIMIT 100000
/* size of DMA buffers */
#define VIA_MAX_BUFFER_DMA_PAGES 32
/* buffering default values in ms */
#define VIA_DEFAULT_FRAG_TIME 20
#define VIA_DEFAULT_BUFFER_TIME 500
/* the hardware has a 256 fragment limit */
#define VIA_MIN_FRAG_NUMBER 2
#define VIA_MAX_FRAG_NUMBER 128
#define VIA_MAX_FRAG_SIZE PAGE_SIZE
#define VIA_MIN_FRAG_SIZE (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER)
/* 82C686 function 5 (audio codec) PCI configuration registers */
#define VIA_ACLINK_STATUS 0x40
#define VIA_ACLINK_CTRL 0x41
#define VIA_FUNC_ENABLE 0x42
#define VIA_PNP_CONTROL 0x43
#define VIA_FM_NMI_CTRL 0x48
/*
* controller base 0 (scatter-gather) registers
*
* NOTE: Via datasheet lists first channel as "read"
* channel and second channel as "write" channel.
* I changed the naming of the constants to be more
* clear than I felt the datasheet to be.
*/
#define VIA_BASE0_PCM_OUT_CHAN 0x00 /* output PCM to user */
#define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00
#define VIA_BASE0_PCM_OUT_CHAN_CTRL 0x01
#define VIA_BASE0_PCM_OUT_CHAN_TYPE 0x02
#define VIA_BASE0_PCM_IN_CHAN 0x10 /* input PCM from user */
#define VIA_BASE0_PCM_IN_CHAN_STATUS 0x10
#define VIA_BASE0_PCM_IN_CHAN_CTRL 0x11
#define VIA_BASE0_PCM_IN_CHAN_TYPE 0x12
/* offsets from base */
#define VIA_PCM_STATUS 0x00
#define VIA_PCM_CONTROL 0x01
#define VIA_PCM_TYPE 0x02
#define VIA_PCM_LEFTVOL 0x02
#define VIA_PCM_RIGHTVOL 0x03
#define VIA_PCM_TABLE_ADDR 0x04
#define VIA_PCM_STOPRATE 0x08 /* 8233+ */
#define VIA_PCM_BLOCK_COUNT 0x0C
/* XXX unused DMA channel for FM PCM data */
#define VIA_BASE0_FM_OUT_CHAN 0x20
#define VIA_BASE0_FM_OUT_CHAN_STATUS 0x20
#define VIA_BASE0_FM_OUT_CHAN_CTRL 0x21
#define VIA_BASE0_FM_OUT_CHAN_TYPE 0x22
/* Six channel audio output on 8233 */
#define VIA_BASE0_MULTI_OUT_CHAN 0x40
#define VIA_BASE0_MULTI_OUT_CHAN_STATUS 0x40
#define VIA_BASE0_MULTI_OUT_CHAN_CTRL 0x41
#define VIA_BASE0_MULTI_OUT_CHAN_TYPE 0x42
#define VIA_BASE0_AC97_CTRL 0x80
#define VIA_BASE0_SGD_STATUS_SHADOW 0x84
#define VIA_BASE0_GPI_INT_ENABLE 0x8C
#define VIA_INTR_OUT ((1<<0) | (1<<4) | (1<<8))
#define VIA_INTR_IN ((1<<1) | (1<<5) | (1<<9))
#define VIA_INTR_FM ((1<<2) | (1<<6) | (1<<10))
#define VIA_INTR_MASK (VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM)
/* Newer VIA we need to monitor the low 3 bits of each channel. This
mask covers the channels we don't yet use as well
*/
#define VIA_NEW_INTR_MASK 0x77077777UL
/* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */
#define VIA_IRQ_ON_FLAG (1<<0) /* int on each flagged scatter block */
#define VIA_IRQ_ON_EOL (1<<1) /* int at end of scatter list */
#define VIA_INT_SEL_PCI_LAST_LINE_READ (0) /* int at PCI read of last line */
#define VIA_INT_SEL_LAST_SAMPLE_SENT (1<<2) /* int at last sample sent */
#define VIA_INT_SEL_ONE_LINE_LEFT (1<<3) /* int at less than one line to send */
#define VIA_PCM_FMT_STEREO (1<<4) /* PCM stereo format (bit clear == mono) */
#define VIA_PCM_FMT_16BIT (1<<5) /* PCM 16-bit format (bit clear == 8-bit) */
#define VIA_PCM_REC_FIFO (1<<6) /* PCM Recording FIFO */
#define VIA_RESTART_SGD_ON_EOL (1<<7) /* restart scatter-gather at EOL */
#define VIA_PCM_FMT_MASK (VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT)
#define VIA_CHAN_TYPE_MASK (VIA_RESTART_SGD_ON_EOL | \
VIA_IRQ_ON_FLAG | \
VIA_IRQ_ON_EOL)
#define VIA_CHAN_TYPE_INT_SELECT (VIA_INT_SEL_LAST_SAMPLE_SENT)
/* PCI configuration register bits and masks */
#define VIA_CR40_AC97_READY 0x01
#define VIA_CR40_AC97_LOW_POWER 0x02
#define VIA_CR40_SECONDARY_READY 0x04
#define VIA_CR41_AC97_ENABLE 0x80 /* enable AC97 codec */
#define VIA_CR41_AC97_RESET 0x40 /* clear bit to reset AC97 */
#define VIA_CR41_AC97_WAKEUP 0x20 /* wake up from power-down mode */
#define VIA_CR41_AC97_SDO 0x10 /* force Serial Data Out (SDO) high */
#define VIA_CR41_VRA 0x08 /* enable variable sample rate */
#define VIA_CR41_PCM_ENABLE 0x04 /* AC Link SGD Read Channel PCM Data Output */
#define VIA_CR41_FM_PCM_ENABLE 0x02 /* AC Link FM Channel PCM Data Out */
#define VIA_CR41_SB_PCM_ENABLE 0x01 /* AC Link SB PCM Data Output */
#define VIA_CR41_BOOT_MASK (VIA_CR41_AC97_ENABLE | \
VIA_CR41_AC97_WAKEUP | \
VIA_CR41_AC97_SDO)
#define VIA_CR41_RUN_MASK (VIA_CR41_AC97_ENABLE | \
VIA_CR41_AC97_RESET | \
VIA_CR41_VRA | \
VIA_CR41_PCM_ENABLE)
#define VIA_CR42_SB_ENABLE 0x01
#define VIA_CR42_MIDI_ENABLE 0x02
#define VIA_CR42_FM_ENABLE 0x04
#define VIA_CR42_GAME_ENABLE 0x08
#define VIA_CR42_MIDI_IRQMASK 0x40
#define VIA_CR42_MIDI_PNP 0x80
#define VIA_CR44_SECOND_CODEC_SUPPORT (1 << 6)
#define VIA_CR44_AC_LINK_ACCESS (1 << 7)
#define VIA_CR48_FM_TRAP_TO_NMI (1 << 2)
/* controller base 0 register bitmasks */
#define VIA_INT_DISABLE_MASK (~(0x01|0x02))
#define VIA_SGD_STOPPED (1 << 2)
#define VIA_SGD_PAUSED (1 << 6)
#define VIA_SGD_ACTIVE (1 << 7)
#define VIA_SGD_TERMINATE (1 << 6)
#define VIA_SGD_FLAG (1 << 0)
#define VIA_SGD_EOL (1 << 1)
#define VIA_SGD_START (1 << 7)
#define VIA_CR80_FIRST_CODEC 0
#define VIA_CR80_SECOND_CODEC (1 << 30)
#define VIA_CR80_FIRST_CODEC_VALID (1 << 25)
#define VIA_CR80_VALID (1 << 25)
#define VIA_CR80_SECOND_CODEC_VALID (1 << 27)
#define VIA_CR80_BUSY (1 << 24)
#define VIA_CR83_BUSY (1)
#define VIA_CR83_FIRST_CODEC_VALID (1 << 1)
#define VIA_CR80_READ (1 << 23)
#define VIA_CR80_WRITE_MODE 0
#define VIA_CR80_REG_IDX(idx) ((((idx) & 0xFF) >> 1) << 16)
/* capabilities we announce */
#ifdef VIA_SUPPORT_MMAP
#define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \
DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
#else
#define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \
DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
#endif
/* scatter-gather DMA table entry, exactly as passed to hardware */
struct via_sgd_table {
u32 addr;
u32 count; /* includes additional VIA_xxx bits also */
};
#define VIA_EOL (1 << 31)
#define VIA_FLAG (1 << 30)
#define VIA_STOP (1 << 29)
enum via_channel_states {
sgd_stopped = 0,
sgd_in_progress = 1,
};
struct via_buffer_pgtbl {
dma_addr_t handle;
void *cpuaddr;
};
struct via_channel {
atomic_t n_frags;
atomic_t hw_ptr;
wait_queue_head_t wait;
unsigned int sw_ptr;
unsigned int slop_len;
unsigned int n_irqs;
int bytes;
unsigned is_active : 1;
unsigned is_record : 1;
unsigned is_mapped : 1;
unsigned is_enabled : 1;
unsigned is_multi: 1; /* 8233 6 channel */
u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
u8 channels; /* Channel count */
unsigned rate; /* sample rate */
unsigned int frag_size;
unsigned int frag_number;
unsigned char intmask;
volatile struct via_sgd_table *sgtable;
dma_addr_t sgt_handle;
unsigned int page_number;
struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES];
long iobase;
const char *name;
};
/* data stored for each chip */
struct via_info {
struct pci_dev *pdev;
long baseaddr;
struct ac97_codec *ac97;
spinlock_t ac97_lock;
spinlock_t lock;
int card_num; /* unique card number, from 0 */
int dev_dsp; /* /dev/dsp index from register_sound_dsp() */
unsigned rev_h : 1;
unsigned legacy: 1; /* Has legacy ports */
unsigned intmask: 1; /* Needs int bits */
unsigned sixchannel: 1; /* 8233/35 with 6 channel support */
unsigned volume: 1;
unsigned locked_rate : 1;
int mixer_vol; /* 8233/35 volume - not yet implemented */
struct mutex syscall_mutex;
struct mutex open_mutex;
/* The 8233/8235 have 4 DX audio channels, two record and
one six channel out. We bind ch_in to DX 1, ch_out to multichannel
and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the
moment */
struct via_channel ch_in;
struct via_channel ch_out;
struct via_channel ch_fm;
#ifdef CONFIG_MIDI_VIA82CXXX
void *midi_devc;
struct address_info midi_info;
#endif
};
/* number of cards, used for assigning unique numbers to cards */
static unsigned via_num_cards;
/****************************************************************
*
* prototypes
*
*
*/
static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
static void __devexit via_remove_one (struct pci_dev *pdev);
static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos);
static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos);
static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait);
static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
static int via_dsp_open (struct inode *inode, struct file *file);
static int via_dsp_release(struct inode *inode, struct file *file);
static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma);
static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg);
static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value);
static u8 via_ac97_wait_idle (struct via_info *card);
static void via_chan_free (struct via_info *card, struct via_channel *chan);
static void via_chan_clear (struct via_info *card, struct via_channel *chan);
static void via_chan_pcm_fmt (struct via_channel *chan, int reset);
static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan);
/****************************************************************
*
* Various data the driver needs
*
*
*/
static struct pci_device_id via_pci_tbl[] = {
{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
{ 0, }
};
MODULE_DEVICE_TABLE(pci,via_pci_tbl);
static struct pci_driver via_driver = {
.name = VIA_MODULE_NAME,
.id_table = via_pci_tbl,
.probe = via_init_one,
.remove = __devexit_p(via_remove_one),
};
/****************************************************************
*
* Low-level base 0 register read/write helpers
*
*
*/
/**
* via_chan_stop - Terminate DMA on specified PCM channel
* @iobase: PCI base address for SGD channel registers
*
* Terminate scatter-gather DMA operation for given
* channel (derived from @iobase), if DMA is active.
*
* Note that @iobase is not the PCI base address,
* but the PCI base address plus an offset to
* one of three PCM channels supported by the chip.
*
*/
static inline void via_chan_stop (long iobase)
{
if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE)
outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL);
}
/**
* via_chan_status_clear - Clear status flags on specified DMA channel
* @iobase: PCI base address for SGD channel registers
*
* Clear any pending status flags for the given
* DMA channel (derived from @iobase), if any
* flags are asserted.
*
* Note that @iobase is not the PCI base address,
* but the PCI base address plus an offset to
* one of three PCM channels supported by the chip.
*
*/
static inline void via_chan_status_clear (long iobase)
{
u8 tmp = inb (iobase + VIA_PCM_STATUS);
if (tmp != 0)
outb (tmp, iobase + VIA_PCM_STATUS);
}
/**
* sg_begin - Begin recording or playback on a PCM channel
* @chan: Channel for which DMA operation shall begin
*
* Start scatter-gather DMA for the given channel.
*
*/
static inline void sg_begin (struct via_channel *chan)
{
DPRINTK("Start with intmask %d\n", chan->intmask);
DPRINTK("About to start from %d to %d\n",
inl(chan->iobase + VIA_PCM_BLOCK_COUNT),
inb(chan->iobase + VIA_PCM_STOPRATE + 3));
outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL);
DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS));
DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL));
}
static int sg_active (long iobase)
{
u8 tmp = inb (iobase + VIA_PCM_STATUS);
if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) {
printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n");
return 0;
}
if (tmp & VIA_SGD_ACTIVE)
return 1;
return 0;
}
static int via_sg_offset(struct via_channel *chan)
{
return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF;
}
/****************************************************************
*
* Miscellaneous debris
*
*
*/
/**
* via_syscall_down - down the card-specific syscell semaphore
* @card: Private info for specified board
* @nonblock: boolean, non-zero if O_NONBLOCK is set
*
* Encapsulates standard method of acquiring the syscall sem.
*
* Returns negative errno on error, or zero for success.
*/
static inline int via_syscall_down (struct via_info *card, int nonblock)
{
/* Thomas Sailer:
* EAGAIN is supposed to be used if IO is pending,
* not if there is contention on some internal
* synchronization primitive which should be
* held only for a short time anyway
*/
nonblock = 0;
if (nonblock) {
if (!mutex_trylock(&card->syscall_mutex))
return -EAGAIN;
} else {
if (mutex_lock_interruptible(&card->syscall_mutex))
return -ERESTARTSYS;
}
return 0;
}
/**
* via_stop_everything - Stop all audio operations
* @card: Private info for specified board
*
* Stops all DMA operations and interrupts, and clear
* any pending status bits resulting from those operations.
*/
static void via_stop_everything (struct via_info *card)
{
u8 tmp, new_tmp;
DPRINTK ("ENTER\n");
assert (card != NULL);
/*
* terminate any existing operations on audio read/write channels
*/
via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
if(card->sixchannel)
via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
/*
* clear any existing stops / flags (sanity check mainly)
*/
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
if(card->sixchannel)
via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
/*
* clear any enabled interrupt bits
*/
tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
if (tmp != new_tmp)
outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
if (tmp != new_tmp)
outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
if (tmp != new_tmp)
outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
if(card->sixchannel)
{
tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
if (tmp != new_tmp)
outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
}
udelay(10);
/*
* clear any existing flags
*/
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
DPRINTK ("EXIT\n");
}
/**
* via_set_rate - Set PCM rate for given channel
* @ac97: Pointer to generic codec info struct
* @chan: Private info for specified channel
* @rate: Desired PCM sample rate, in Khz
*
* Sets the PCM sample rate for a channel.
*
* Values for @rate are clamped to a range of 4000 Khz through 48000 Khz,
* due to hardware constraints.
*/
static int via_set_rate (struct ac97_codec *ac97,
struct via_channel *chan, unsigned rate)
{
struct via_info *card = ac97->private_data;
int rate_reg;
u32 dacp;
u32 mast_vol, phone_vol, mono_vol, pcm_vol;
u32 mute_vol = 0x8000; /* The mute volume? -- Seems to work! */
DPRINTK ("ENTER, rate = %d\n", rate);
if (chan->rate == rate)
goto out;
if (card->locked_rate) {
chan->rate = 48000;
goto out;
}
if (rate > 48000) rate = 48000;
if (rate < 4000) rate = 4000;
rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE :
AC97_PCM_FRONT_DAC_RATE;
/* Save current state */
dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL);
mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO);
mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO);
phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL);
pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL);
/* Mute - largely reduces popping */
via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol);
via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol);
via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol);
via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol);
/* Power down the DAC */
via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200);
/* Set new rate */
via_ac97_write_reg (ac97, rate_reg, rate);
/* Power DAC back up */
via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp);
udelay (200); /* reduces popping */
/* Restore volumes */
via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol);
via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol);
via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol);
via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol);
/* the hardware might return a value different than what we
* passed to it, so read the rate value back from hardware
* to see what we came up with
*/
chan->rate = via_ac97_read_reg (ac97, rate_reg);
if (chan->rate == 0) {
card->locked_rate = 1;
chan->rate = 48000;
printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
}
out:
DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate);
return chan->rate;
}
/****************************************************************
*
* Channel-specific operations
*
*
*/
/**
* via_chan_init_defaults - Initialize a struct via_channel
* @card: Private audio chip info
* @chan: Channel to be initialized
*
* Zero @chan, and then set all static defaults for the structure.
*/
static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan)
{
memset (chan, 0, sizeof (*chan));
if(card->intmask)
chan->intmask = 0x23; /* Turn on the IRQ bits */
if (chan == &card->ch_out) {
chan->name = "PCM-OUT";
if(card->sixchannel)
{
chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN;
chan->is_multi = 1;
DPRINTK("Using multichannel for pcm out\n");
}
else
chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN;
} else if (chan == &card->ch_in) {
chan->name = "PCM-IN";
chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN;
chan->is_record = 1;
} else if (chan == &card->ch_fm) {
chan->name = "PCM-OUT-FM";
chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN;
} else {
BUG();
}
init_waitqueue_head (&chan->wait);
chan->pcm_fmt = VIA_PCM_FMT_MASK;
chan->is_enabled = 1;
chan->frag_number = 0;
chan->frag_size = 0;
atomic_set(&chan->n_frags, 0);
atomic_set (&chan->hw_ptr, 0);
}
/**
* via_chan_init - Initialize PCM channel
* @card: Private audio chip info
* @chan: Channel to be initialized
*
* Performs some of the preparations necessary to begin
* using a PCM channel.
*
* Currently the preparations consist of
* setting the PCM channel to a known state.
*/
static void via_chan_init (struct via_info *card, struct via_channel *chan)
{
DPRINTK ("ENTER\n");
/* bzero channel structure, and init members to defaults */
via_chan_init_defaults (card, chan);
/* stop any existing channel output */
via_chan_clear (card, chan);
via_chan_status_clear (chan->iobase);
via_chan_pcm_fmt (chan, 1);
DPRINTK ("EXIT\n");
}
/**
* via_chan_buffer_init - Initialize PCM channel buffer
* @card: Private audio chip info
* @chan: Channel to be initialized
*
* Performs some of the preparations necessary to begin
* using a PCM channel.
*
* Currently the preparations include allocating the
* scatter-gather DMA table and buffers,
* and passing the
* address of the DMA table to the hardware.
*
* Note that special care is taken when passing the
* DMA table address to hardware, because it was found
* during driver development that the hardware did not
* always "take" the address.
*/
static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan)
{
int page, offset;
int i;
DPRINTK ("ENTER\n");
chan->intmask = 0;
if(card->intmask)
chan->intmask = 0x23; /* Turn on the IRQ bits */
if (chan->sgtable != NULL) {
DPRINTK ("EXIT\n");
return 0;
}
/* alloc DMA-able memory for scatter-gather table */
chan->sgtable = pci_alloc_consistent (card->pdev,
(sizeof (struct via_sgd_table) * chan->frag_number),
&chan->sgt_handle);
if (!chan->sgtable) {
printk (KERN_ERR PFX "DMA table alloc fail, aborting\n");
DPRINTK ("EXIT\n");
return -ENOMEM;
}
memset ((void*)chan->sgtable, 0,
(sizeof (struct via_sgd_table) * chan->frag_number));
/* alloc DMA-able memory for scatter-gather buffers */
chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE +
(((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0);
for (i = 0; i < chan->page_number; i++) {
chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE,
&chan->pgtbl[i].handle);
if (!chan->pgtbl[i].cpuaddr) {
chan->page_number = i;
goto err_out_nomem;
}
#ifndef VIA_NDEBUG
memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size);
#endif
#if 1
DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n",
i, (long)chan->pgtbl[i].handle,
virt_to_phys(chan->pgtbl[i].cpuaddr),
chan->pgtbl[i].cpuaddr);
#endif
}
for (i = 0; i < chan->frag_number; i++) {
page = i / (PAGE_SIZE / chan->frag_size);
offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset);
#if 1
DPRINTK ("dmabuf #%d (32(h)=%lx)\n",
i,
(long)chan->sgtable[i].addr);
#endif
}
/* overwrite the last buffer information */
chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
/* set location of DMA-able scatter-gather info table */
DPRINTK ("outl (0x%X, 0x%04lX)\n",
chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
via_ac97_wait_idle (card);
outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
udelay (20);
via_ac97_wait_idle (card);
/* load no rate adaption, stereo 16bit, set up ring slots */
if(card->sixchannel)
{
if(!chan->is_multi)
{
outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE);
udelay (20);
via_ac97_wait_idle (card);
}
}
DPRINTK ("inl (0x%lX) = %x\n",
chan->iobase + VIA_PCM_TABLE_ADDR,
inl(chan->iobase + VIA_PCM_TABLE_ADDR));
DPRINTK ("EXIT\n");
return 0;
err_out_nomem:
printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n");
via_chan_buffer_free (card, chan);
DPRINTK ("EXIT\n");
return -ENOMEM;
}
/**
* via_chan_free - Release a PCM channel
* @card: Private audio chip info
* @chan: Channel to be released
*
* Performs all the functions necessary to clean up
* an initialized channel.
*
* Currently these functions include disabled any
* active DMA operations, setting the PCM channel
* back to a known state, and releasing any allocated
* sound buffers.
*/
static void via_chan_free (struct via_info *card, struct via_channel *chan)
{
DPRINTK ("ENTER\n");
spin_lock_irq (&card->lock);
/* stop any existing channel output */
via_chan_status_clear (chan->iobase);
via_chan_stop (chan->iobase);
via_chan_status_clear (chan->iobase);
spin_unlock_irq (&card->lock);
synchronize_irq(card->pdev->irq);
DPRINTK ("EXIT\n");
}
static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan)
{
int i;
DPRINTK ("ENTER\n");
/* zero location of DMA-able scatter-gather info table */
via_ac97_wait_idle(card);
outl (0, chan->iobase + VIA_PCM_TABLE_ADDR);
for (i = 0; i < chan->page_number; i++)
if (chan->pgtbl[i].cpuaddr) {
pci_free_consistent (card->pdev, PAGE_SIZE,
chan->pgtbl[i].cpuaddr,
chan->pgtbl[i].handle);
chan->pgtbl[i].cpuaddr = NULL;
chan->pgtbl[i].handle = 0;
}
chan->page_number = 0;
if (chan->sgtable) {
pci_free_consistent (card->pdev,
(sizeof (struct via_sgd_table) * chan->frag_number),
(void*)chan->sgtable, chan->sgt_handle);
chan->sgtable = NULL;
}
DPRINTK ("EXIT\n");
}
/**
* via_chan_pcm_fmt - Update PCM channel settings
* @chan: Channel to be updated
* @reset: Boolean. If non-zero, channel will be reset
* to 8-bit mono mode.
*
* Stores the settings of the current PCM format,
* 8-bit or 16-bit, and mono/stereo, into the
* hardware settings for the specified channel.
* If @reset is non-zero, the channel is reset
* to 8-bit mono mode. Otherwise, the channel
* is set to the values stored in the channel
* information struct @chan.
*/
static void via_chan_pcm_fmt (struct via_channel *chan, int reset)
{
DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
chan->pcm_fmt, reset ? "yes" : "no");
assert (chan != NULL);
if (reset)
{
/* reset to 8-bit mono mode */
chan->pcm_fmt = 0;
chan->channels = 1;
}
/* enable interrupts on FLAG and EOL */
chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
/* if we are recording, enable recording fifo bit */
if (chan->is_record)
chan->pcm_fmt |= VIA_PCM_REC_FIFO;
/* set interrupt select bits where applicable (PCM in & out channels) */
if (!chan->is_record)
chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi);
if(chan->intmask)
{
u32 m;
/*
* Channel 0x4 is up to 6 x 16bit and has to be
* programmed differently
*/
if(chan->is_multi)
{
u8 c = 0;
/*
* Load the type bit for num channels
* and 8/16bit
*/
if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
c = 1 << 7;
if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
c |= (2<<4);
else
c |= (1<<4);
outb(c, chan->iobase + VIA_PCM_TYPE);
/*
* Set the channel steering
* Mono
* Channel 0 to slot 3
* Channel 0 to slot 4
* Stereo
* Channel 0 to slot 3
* Channel 1 to slot 4
*/
switch(chan->channels)
{
case 1:
outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE);
break;
case 2:
outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE);
break;
case 4:
outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE);
break;
case 6:
outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE);
break;
}
}
else
{
/*
* New style, turn off channel volume
* control, set bits in the right register
*/
outb(0x0, chan->iobase + VIA_PCM_LEFTVOL);
outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL);
m = inl(chan->iobase + VIA_PCM_STOPRATE);
m &= ~(3<<20);
if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
m |= (1 << 20);
if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
m |= (1 << 21);
outl(m, chan->iobase + VIA_PCM_STOPRATE);
}
}
else
outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE);
DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
chan->pcm_fmt,
inb (chan->iobase + VIA_PCM_TYPE));
}
/**
* via_chan_clear - Stop DMA channel operation, and reset pointers
* @card: the chip to accessed
* @chan: Channel to be cleared
*
* Call via_chan_stop to halt DMA operations, and then resets
* all software pointers which track DMA operation.
*/
static void via_chan_clear (struct via_info *card, struct via_channel *chan)
{
DPRINTK ("ENTER\n");
via_chan_stop (chan->iobase);
via_chan_buffer_free(card, chan);
chan->is_active = 0;
chan->is_mapped = 0;
chan->is_enabled = 1;
chan->slop_len = 0;
chan->sw_ptr = 0;
chan->n_irqs = 0;
atomic_set (&chan->hw_ptr, 0);
DPRINTK ("EXIT\n");
}
/**
* via_chan_set_speed - Set PCM sample rate for given channel
* @card: Private info for specified board
* @chan: Channel whose sample rate will be adjusted
* @val: New sample rate, in Khz
*
* Helper function for the %SNDCTL_DSP_SPEED ioctl. OSS semantics
* demand that all audio operations halt (if they are not already
* halted) when the %SNDCTL_DSP_SPEED is given.
*
* This function halts all audio operations for the given channel
* @chan, and then calls via_set_rate to set the audio hardware
* to the new rate.
*/
static int via_chan_set_speed (struct via_info *card,
struct via_channel *chan, int val)
{
DPRINTK ("ENTER, requested rate = %d\n", val);
via_chan_clear (card, chan);
val = via_set_rate (card->ac97, chan, val);
DPRINTK ("EXIT, returning %d\n", val);
return val;
}
/**
* via_chan_set_fmt - Set PCM sample size for given channel
* @card: Private info for specified board
* @chan: Channel whose sample size will be adjusted
* @val: New sample size, use the %AFMT_xxx constants
*
* Helper function for the %SNDCTL_DSP_SETFMT ioctl. OSS semantics
* demand that all audio operations halt (if they are not already
* halted) when the %SNDCTL_DSP_SETFMT is given.
*
* This function halts all audio operations for the given channel
* @chan, and then calls via_chan_pcm_fmt to set the audio hardware
* to the new sample size, either 8-bit or 16-bit.
*/
static int via_chan_set_fmt (struct via_info *card,
struct via_channel *chan, int val)
{
DPRINTK ("ENTER, val=%s\n",
val == AFMT_U8 ? "AFMT_U8" :
val == AFMT_S16_LE ? "AFMT_S16_LE" :
"unknown");
via_chan_clear (card, chan);
assert (val != AFMT_QUERY); /* this case is handled elsewhere */
switch (val) {
case AFMT_S16_LE:
if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) {
chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
via_chan_pcm_fmt (chan, 0);
}
break;
case AFMT_U8:
if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) {
chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
via_chan_pcm_fmt (chan, 0);
}
break;
default:
DPRINTK ("unknown AFMT: 0x%X\n", val);
val = AFMT_S16_LE;
}
DPRINTK ("EXIT\n");
return val;
}
/**
* via_chan_set_stereo - Enable or disable stereo for a DMA channel
* @card: Private info for specified board
* @chan: Channel whose stereo setting will be adjusted
* @val: New sample size, use the %AFMT_xxx constants
*
* Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics
* demand that all audio operations halt (if they are not already
* halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given.
*
* This function halts all audio operations for the given channel
* @chan, and then calls via_chan_pcm_fmt to set the audio hardware
* to enable or disable stereo.
*/
static int via_chan_set_stereo (struct via_info *card,
struct via_channel *chan, int val)
{
DPRINTK ("ENTER, channels = %d\n", val);
via_chan_clear (card, chan);
switch (val) {
/* mono */
case 1:
chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
chan->channels = 1;
via_chan_pcm_fmt (chan, 0);
break;
/* stereo */
case 2:
chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
chan->channels = 2;
via_chan_pcm_fmt (chan, 0);
break;
case 4:
case 6:
if(chan->is_multi)
{
chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
chan->channels = val;
break;
}
/* unknown */
default:
val = -EINVAL;
break;
}
DPRINTK ("EXIT, returning %d\n", val);
return val;
}
static int via_chan_set_buffering (struct via_info *card,
struct via_channel *chan, int val)
{
int shift;
DPRINTK ("ENTER\n");
/* in both cases the buffer cannot be changed */
if (chan->is_active || chan->is_mapped) {
DPRINTK ("EXIT\n");
return -EINVAL;
}
/* called outside SETFRAGMENT */
/* set defaults or do nothing */
if (val < 0) {
if (chan->frag_size && chan->frag_number)
goto out;
DPRINTK ("\n");
chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * chan->channels
* ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1;
shift = 0;
while (chan->frag_size) {
chan->frag_size >>= 1;
shift++;
}
chan->frag_size = 1 << shift;
chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME);
DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number);
} else {
chan->frag_size = 1 << (val & 0xFFFF);
chan->frag_number = (val >> 16) & 0xFFFF;
DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number);
}
/* quake3 wants frag_number to be a power of two */
shift = 0;
while (chan->frag_number) {
chan->frag_number >>= 1;
shift++;
}
chan->frag_number = 1 << shift;
if (chan->frag_size > VIA_MAX_FRAG_SIZE)
chan->frag_size = VIA_MAX_FRAG_SIZE;
else if (chan->frag_size < VIA_MIN_FRAG_SIZE)
chan->frag_size = VIA_MIN_FRAG_SIZE;
if (chan->frag_number < VIA_MIN_FRAG_NUMBER)
chan->frag_number = VIA_MIN_FRAG_NUMBER;
if (chan->frag_number > VIA_MAX_FRAG_NUMBER)
chan->frag_number = VIA_MAX_FRAG_NUMBER;
if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES)
chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size;
out:
if (chan->is_record)
atomic_set (&chan->n_frags, 0);
else
atomic_set (&chan->n_frags, chan->frag_number);
DPRINTK ("EXIT\n");
return 0;
}
#ifdef VIA_CHAN_DUMP_BUFS
/**
* via_chan_dump_bufs - Display DMA table contents
* @chan: Channel whose DMA table will be displayed
*
* Debugging function which displays the contents of the
* scatter-gather DMA table for the given channel @chan.
*/
static void via_chan_dump_bufs (struct via_channel *chan)
{
int i;
for (i = 0; i < chan->frag_number; i++) {
DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n",
i, chan->sgtable[i].addr,
chan->sgtable[i].count & 0x00FFFFFF,
chan->sgtable[i].count & VIA_FLAG ? 1 : 0,
chan->sgtable[i].count & VIA_EOL ? 1 : 0);
}
DPRINTK ("buf_in_use = %d, nextbuf = %d\n",
atomic_read (&chan->buf_in_use),
atomic_read (&chan->sw_ptr));
}
#endif /* VIA_CHAN_DUMP_BUFS */
/**
* via_chan_flush_frag - Flush partially-full playback buffer to hardware
* @chan: Channel whose DMA table will be flushed
*
* Flushes partially-full playback buffer to hardware.
*/
static void via_chan_flush_frag (struct via_channel *chan)
{
DPRINTK ("ENTER\n");
assert (chan->slop_len > 0);
if (chan->sw_ptr == (chan->frag_number - 1))
chan->sw_ptr = 0;
else
chan->sw_ptr++;
chan->slop_len = 0;
assert (atomic_read (&chan->n_frags) > 0);
atomic_dec (&chan->n_frags);
DPRINTK ("EXIT\n");
}
/**
* via_chan_maybe_start - Initiate audio hardware DMA operation
* @chan: Channel whose DMA is to be started
*
* Initiate DMA operation, if the DMA engine for the given
* channel @chan is not already active.
*/
static inline void via_chan_maybe_start (struct via_channel *chan)
{
assert (chan->is_active == sg_active(chan->iobase));
DPRINTK ("MAYBE START %s\n", chan->name);
if (!chan->is_active && chan->is_enabled) {
chan->is_active = 1;
sg_begin (chan);
DPRINTK ("starting channel %s\n", chan->name);
}
}
/****************************************************************
*
* Interface to ac97-codec module
*
*
*/
/**
* via_ac97_wait_idle - Wait until AC97 codec is not busy
* @card: Private info for specified board
*
* Sleep until the AC97 codec is no longer busy.
* Returns the final value read from the SGD
* register being polled.
*/
static u8 via_ac97_wait_idle (struct via_info *card)
{
u8 tmp8;
int counter = VIA_COUNTER_LIMIT;
DPRINTK ("ENTER/EXIT\n");
assert (card != NULL);
assert (card->pdev != NULL);
do {
udelay (15);
tmp8 = inb (card->baseaddr + 0x83);
} while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
if (tmp8 & VIA_CR83_BUSY)
printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n");
return tmp8;
}
/**
* via_ac97_read_reg - Read AC97 standard register
* @codec: Pointer to generic AC97 codec info
* @reg: Index of AC97 register to be read
*
* Read the value of a single AC97 codec register,
* as defined by the Intel AC97 specification.
*
* Defines the standard AC97 read-register operation
* required by the kernel's ac97_codec interface.
*
* Returns the 16-bit value stored in the specified
* register.
*/
static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg)
{
unsigned long data;
struct via_info *card;
int counter;
DPRINTK ("ENTER\n");
assert (codec != NULL);
assert (codec->private_data != NULL);
card = codec->private_data;
spin_lock(&card->ac97_lock);
/* Every time we write to register 80 we cause a transaction.
The only safe way to clear the valid bit is to write it at
the same time as the command */
data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID;
outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
udelay (20);
for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
udelay (1);
if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) &
(VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID))
goto out;
}
printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data);
goto err_out;
out:
/* Once the valid bit has become set, we must wait a complete AC97
frame before the data has settled. */
udelay(25);
data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL);
outb (0x02, card->baseaddr + 0x83);
if (((data & 0x007F0000) >> 16) == reg) {
DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n",
data, data & 0x0000FFFF);
spin_unlock(&card->ac97_lock);
return data & 0x0000FFFF;
}
printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n",
reg, ((data & 0x007F0000) >> 16));
err_out:
spin_unlock(&card->ac97_lock);
DPRINTK ("EXIT, returning 0\n");
return 0;
}
/**
* via_ac97_write_reg - Write AC97 standard register
* @codec: Pointer to generic AC97 codec info
* @reg: Index of AC97 register to be written
* @value: Value to be written to AC97 register
*
* Write the value of a single AC97 codec register,
* as defined by the Intel AC97 specification.
*
* Defines the standard AC97 write-register operation
* required by the kernel's ac97_codec interface.
*/
static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value)
{
u32 data;
struct via_info *card;
int counter;
DPRINTK ("ENTER\n");
assert (codec != NULL);
assert (codec->private_data != NULL);
card = codec->private_data;
spin_lock(&card->ac97_lock);
data = (reg << 16) + value;
outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
udelay (10);
for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
goto out;
udelay (15);
}
printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value);
out:
spin_unlock(&card->ac97_lock);
DPRINTK ("EXIT\n");
}
static int via_mixer_open (struct inode *inode, struct file *file)
{
int minor = iminor(inode);
struct via_info *card;
struct pci_dev *pdev = NULL;
struct pci_driver *drvr;
DPRINTK ("ENTER\n");
while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
drvr = pci_dev_driver (pdev);
if (drvr == &via_driver) {
assert (pci_get_drvdata (pdev) != NULL);
card = pci_get_drvdata (pdev);
if (card->ac97->dev_mixer == minor)
goto match;
}
}
DPRINTK ("EXIT, returning -ENODEV\n");
return -ENODEV;
match:
pci_dev_put(pdev);
file->private_data = card->ac97;
DPRINTK ("EXIT, returning 0\n");
return nonseekable_open(inode, file);
}
static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
struct ac97_codec *codec = file->private_data;
struct via_info *card;
int nonblock = (file->f_flags & O_NONBLOCK);
int rc;
DPRINTK ("ENTER\n");
assert (codec != NULL);
card = codec->private_data;
assert (card != NULL);
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
#if 0
/*
* Intercept volume control on 8233 and 8235
*/
if(card->volume)
{
switch(cmd)
{
case SOUND_MIXER_READ_VOLUME:
return card->mixer_vol;
case SOUND_MIXER_WRITE_VOLUME:
{
int v;
if(get_user(v, (int *)arg))
{
rc = -EFAULT;
goto out;
}
card->mixer_vol = v;
}
}
}
#endif
rc = codec->mixer_ioctl(codec, cmd, arg);
mutex_unlock(&card->syscall_mutex);
out:
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static struct file_operations via_mixer_fops = {
.owner = THIS_MODULE,
.open = via_mixer_open,
.llseek = no_llseek,
.ioctl = via_mixer_ioctl,
};
static int __devinit via_ac97_reset (struct via_info *card)
{
struct pci_dev *pdev = card->pdev;
u8 tmp8;
u16 tmp16;
DPRINTK ("ENTER\n");
assert (pdev != NULL);
#ifndef NDEBUG
{
u8 r40,r41,r42,r43,r44,r48;
pci_read_config_byte (card->pdev, 0x40, &r40);
pci_read_config_byte (card->pdev, 0x41, &r41);
pci_read_config_byte (card->pdev, 0x42, &r42);
pci_read_config_byte (card->pdev, 0x43, &r43);
pci_read_config_byte (card->pdev, 0x44, &r44);
pci_read_config_byte (card->pdev, 0x48, &r48);
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
r40,r41,r42,r43,r44,r48);
spin_lock_irq (&card->lock);
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
spin_unlock_irq (&card->lock);
}
#endif
/*
* Reset AC97 controller: enable, disable, enable,
* pausing after each command for good luck. Only
* do this if the codec is not ready, because it causes
* loud pops and such due to such a hard codec reset.
*/
pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
VIA_CR41_AC97_ENABLE |
VIA_CR41_AC97_RESET |
VIA_CR41_AC97_WAKEUP);
udelay (100);
pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
udelay (100);
pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
VIA_CR41_AC97_ENABLE |
VIA_CR41_PCM_ENABLE |
VIA_CR41_VRA | VIA_CR41_AC97_RESET);
udelay (100);
}
/* Make sure VRA is enabled, in case we didn't do a
* complete codec reset, above
*/
pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
if (((tmp8 & VIA_CR41_VRA) == 0) ||
((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
VIA_CR41_AC97_ENABLE |
VIA_CR41_PCM_ENABLE |
VIA_CR41_VRA | VIA_CR41_AC97_RESET);
udelay (100);
}
if(card->legacy)
{
#if 0 /* this breaks on K7M */
/* disable legacy stuff */
pci_write_config_byte (pdev, 0x42, 0x00);
udelay(10);
#endif
/* route FM trap to IRQ, disable FM trap */
pci_write_config_byte (pdev, 0x48, 0x05);
udelay(10);
}
/* disable all codec GPI interrupts */
outl (0, pci_resource_start (pdev, 0) + 0x8C);
/* WARNING: this line is magic. Remove this
* and things break. */
/* enable variable rate */
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
if ((tmp16 & 1) == 0)
via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static void via_ac97_codec_wait (struct ac97_codec *codec)
{
assert (codec->private_data != NULL);
via_ac97_wait_idle (codec->private_data);
}
static int __devinit via_ac97_init (struct via_info *card)
{
int rc;
u16 tmp16;
DPRINTK ("ENTER\n");
assert (card != NULL);
card->ac97 = ac97_alloc_codec();
if(card->ac97 == NULL)
return -ENOMEM;
card->ac97->private_data = card;
card->ac97->codec_read = via_ac97_read_reg;
card->ac97->codec_write = via_ac97_write_reg;
card->ac97->codec_wait = via_ac97_codec_wait;
card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
if (card->ac97->dev_mixer < 0) {
printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
DPRINTK ("EXIT, returning -EIO\n");
ac97_release_codec(card->ac97);
return -EIO;
}
rc = via_ac97_reset (card);
if (rc) {
printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
goto err_out;
}
mdelay(10);
if (ac97_probe_codec (card->ac97) == 0) {
printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
rc = -EIO;
goto err_out;
}
/* enable variable rate */
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
/*
* If we cannot enable VRA, we have a locked-rate codec.
* We try again to enable VRA before assuming so, however.
*/
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
if ((tmp16 & 1) == 0) {
via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
if ((tmp16 & 1) == 0) {
card->locked_rate = 1;
printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
}
}
DPRINTK ("EXIT, returning 0\n");
return 0;
err_out:
unregister_sound_mixer (card->ac97->dev_mixer);
DPRINTK ("EXIT, returning %d\n", rc);
ac97_release_codec(card->ac97);
return rc;
}
static void via_ac97_cleanup (struct via_info *card)
{
DPRINTK ("ENTER\n");
assert (card != NULL);
assert (card->ac97->dev_mixer >= 0);
unregister_sound_mixer (card->ac97->dev_mixer);
ac97_release_codec(card->ac97);
DPRINTK ("EXIT\n");
}
/****************************************************************
*
* Interrupt-related code
*
*/
/**
* via_intr_channel - handle an interrupt for a single channel
* @card: unused
* @chan: handle interrupt for this channel
*
* This is the "meat" of the interrupt handler,
* containing the actions taken each time an interrupt
* occurs. All communication and coordination with
* userspace takes place here.
*
* Locking: inside card->lock
*/
static void via_intr_channel (struct via_info *card, struct via_channel *chan)
{
u8 status;
int n;
/* check pertinent bits of status register for action bits */
status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
if (!status)
return;
/* acknowledge any flagged bits ASAP */
outb (status, chan->iobase);
if (!chan->sgtable) /* XXX: temporary solution */
return;
/* grab current h/w ptr value */
n = atomic_read (&chan->hw_ptr);
/* sanity check: make sure our h/w ptr doesn't have a weird value */
assert (n >= 0);
assert (n < chan->frag_number);
/* reset SGD data structure in memory to reflect a full buffer,
* and advance the h/w ptr, wrapping around to zero if needed
*/
if (n == (chan->frag_number - 1)) {
chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
atomic_set (&chan->hw_ptr, 0);
} else {
chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
atomic_inc (&chan->hw_ptr);
}
/* accounting crap for SNDCTL_DSP_GETxPTR */
chan->n_irqs++;
chan->bytes += chan->frag_size;
/* FIXME - signed overflow is undefined */
if (chan->bytes < 0) /* handle overflow of 31-bit value */
chan->bytes = chan->frag_size;
/* all following checks only occur when not in mmap(2) mode */
if (!chan->is_mapped)
{
/* If we are recording, then n_frags represents the number
* of fragments waiting to be handled by userspace.
* If we are playback, then n_frags represents the number
* of fragments remaining to be filled by userspace.
* We increment here. If we reach max number of fragments,
* this indicates an underrun/overrun. For this case under OSS,
* we stop the record/playback process.
*/
if (atomic_read (&chan->n_frags) < chan->frag_number)
atomic_inc (&chan->n_frags);
assert (atomic_read (&chan->n_frags) <= chan->frag_number);
if (atomic_read (&chan->n_frags) == chan->frag_number) {
chan->is_active = 0;
via_chan_stop (chan->iobase);
}
}
/* wake up anyone listening to see when interrupts occur */
wake_up_all (&chan->wait);
DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
chan->name, status, (long) inl (chan->iobase + 0x04),
atomic_read (&chan->hw_ptr));
DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
atomic_read (&chan->n_frags), missed);
}
static irqreturn_t via_interrupt(int irq, void *dev_id)
{
struct via_info *card = dev_id;
u32 status32;
/* to minimize interrupt sharing costs, we use the SGD status
* shadow register to check the status of all inputs and
* outputs with a single 32-bit bus read. If no interrupt
* conditions are flagged, we exit immediately
*/
status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
if (!(status32 & VIA_INTR_MASK))
{
#ifdef CONFIG_MIDI_VIA82CXXX
if (card->midi_devc)
uart401intr(irq, card->midi_devc);
#endif
return IRQ_HANDLED;
}
DPRINTK ("intr, status32 == 0x%08X\n", status32);
/* synchronize interrupt handling under SMP. this spinlock
* goes away completely on UP
*/
spin_lock (&card->lock);
if (status32 & VIA_INTR_OUT)
via_intr_channel (card, &card->ch_out);
if (status32 & VIA_INTR_IN)
via_intr_channel (card, &card->ch_in);
if (status32 & VIA_INTR_FM)
via_intr_channel (card, &card->ch_fm);
spin_unlock (&card->lock);
return IRQ_HANDLED;
}
static irqreturn_t via_new_interrupt(int irq, void *dev_id)
{
struct via_info *card = dev_id;
u32 status32;
/* to minimize interrupt sharing costs, we use the SGD status
* shadow register to check the status of all inputs and
* outputs with a single 32-bit bus read. If no interrupt
* conditions are flagged, we exit immediately
*/
status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
if (!(status32 & VIA_NEW_INTR_MASK))
return IRQ_NONE;
/*
* goes away completely on UP
*/
spin_lock (&card->lock);
via_intr_channel (card, &card->ch_out);
via_intr_channel (card, &card->ch_in);
via_intr_channel (card, &card->ch_fm);
spin_unlock (&card->lock);
return IRQ_HANDLED;
}
/**
* via_interrupt_init - Initialize interrupt handling
* @card: Private info for specified board
*
* Obtain and reserve IRQ for using in handling audio events.
* Also, disable any IRQ-generating resources, to make sure
* we don't get interrupts before we want them.
*/
static int via_interrupt_init (struct via_info *card)
{
u8 tmp8;
DPRINTK ("ENTER\n");
assert (card != NULL);
assert (card->pdev != NULL);
/* check for sane IRQ number. can this ever happen? */
if (card->pdev->irq < 2) {
printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
card->pdev->irq);
DPRINTK ("EXIT, returning -EIO\n");
return -EIO;
}
/* VIA requires this is done */
pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
if(card->legacy)
{
/* make sure FM irq is not routed to us */
pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
}
if (request_irq (card->pdev->irq, via_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
card->pdev->irq);
DPRINTK ("EXIT, returning -EBUSY\n");
return -EBUSY;
}
}
else
{
if (request_irq (card->pdev->irq, via_new_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
card->pdev->irq);
DPRINTK ("EXIT, returning -EBUSY\n");
return -EBUSY;
}
}
DPRINTK ("EXIT, returning 0\n");
return 0;
}
/****************************************************************
*
* OSS DSP device
*
*/
static struct file_operations via_dsp_fops = {
.owner = THIS_MODULE,
.open = via_dsp_open,
.release = via_dsp_release,
.read = via_dsp_read,
.write = via_dsp_write,
.poll = via_dsp_poll,
.llseek = no_llseek,
.ioctl = via_dsp_ioctl,
.mmap = via_dsp_mmap,
};
static int __devinit via_dsp_init (struct via_info *card)
{
u8 tmp8;
DPRINTK ("ENTER\n");
assert (card != NULL);
if(card->legacy)
{
/* turn off legacy features, if not already */
pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
}
}
via_stop_everything (card);
card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
if (card->dev_dsp < 0) {
DPRINTK ("EXIT, returning -ENODEV\n");
return -ENODEV;
}
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static void via_dsp_cleanup (struct via_info *card)
{
DPRINTK ("ENTER\n");
assert (card != NULL);
assert (card->dev_dsp >= 0);
via_stop_everything (card);
unregister_sound_dsp (card->dev_dsp);
DPRINTK ("EXIT\n");
}
static struct page * via_mm_nopage (struct vm_area_struct * vma,
unsigned long address, int *type)
{
struct via_info *card = vma->vm_private_data;
struct via_channel *chan = &card->ch_out;
struct page *dmapage;
unsigned long pgoff;
int rd, wr;
DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
vma->vm_start,
address - vma->vm_start,
(address - vma->vm_start) >> PAGE_SHIFT,
address);
if (address > vma->vm_end) {
DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
return NOPAGE_SIGBUS; /* Disallow mremap */
}
if (!card) {
DPRINTK ("EXIT, returning NOPAGE_OOM\n");
return NOPAGE_OOM; /* Nothing allocated */
}
pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
rd = card->ch_in.is_mapped;
wr = card->ch_out.is_mapped;
#ifndef VIA_NDEBUG
{
unsigned long max_bufs = chan->frag_number;
if (rd && wr) max_bufs *= 2;
/* via_dsp_mmap() should ensure this */
assert (pgoff < max_bufs);
}
#endif
/* if full-duplex (read+write) and we have two sets of bufs,
* then the playback buffers come first, sez soundcard.c */
if (pgoff >= chan->page_number) {
pgoff -= chan->page_number;
chan = &card->ch_in;
} else if (!wr)
chan = &card->ch_in;
assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
get_page (dmapage);
if (type)
*type = VM_FAULT_MINOR;
return dmapage;
}
#ifndef VM_RESERVED
static int via_mm_swapout (struct page *page, struct file *filp)
{
return 0;
}
#endif /* VM_RESERVED */
static struct vm_operations_struct via_mm_ops = {
.nopage = via_mm_nopage,
#ifndef VM_RESERVED
.swapout = via_mm_swapout,
#endif
};
static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
{
struct via_info *card;
int nonblock = (file->f_flags & O_NONBLOCK);
int rc = -EINVAL, rd=0, wr=0;
unsigned long max_size, size, start, offset;
assert (file != NULL);
assert (vma != NULL);
card = file->private_data;
assert (card != NULL);
DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
vma->vm_start,
vma->vm_end - vma->vm_start,
vma->vm_pgoff);
max_size = 0;
if (vma->vm_flags & VM_READ) {
rd = 1;
via_chan_set_buffering(card, &card->ch_in, -1);
via_chan_buffer_init (card, &card->ch_in);
max_size += card->ch_in.page_number << PAGE_SHIFT;
}
if (vma->vm_flags & VM_WRITE) {
wr = 1;
via_chan_set_buffering(card, &card->ch_out, -1);
via_chan_buffer_init (card, &card->ch_out);
max_size += card->ch_out.page_number << PAGE_SHIFT;
}
start = vma->vm_start;
offset = (vma->vm_pgoff << PAGE_SHIFT);
size = vma->vm_end - vma->vm_start;
/* some basic size/offset sanity checks */
if (size > max_size)
goto out;
if (offset > max_size - size)
goto out;
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
vma->vm_ops = &via_mm_ops;
vma->vm_private_data = card;
#ifdef VM_RESERVED
vma->vm_flags |= VM_RESERVED;
#endif
if (rd)
card->ch_in.is_mapped = 1;
if (wr)
card->ch_out.is_mapped = 1;
mutex_unlock(&card->syscall_mutex);
rc = 0;
out:
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static ssize_t via_dsp_do_read (struct via_info *card,
char __user *userbuf, size_t count,
int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
const char __user *orig_userbuf = userbuf;
struct via_channel *chan = &card->ch_in;
size_t size;
int n, tmp;
ssize_t ret = 0;
/* if SGD has not yet been started, start it */
via_chan_maybe_start (chan);
handle_one_block:
/* just to be a nice neighbor */
/* Thomas Sailer:
* But also to ourselves, release semaphore if we do so */
if (need_resched()) {
mutex_unlock(&card->syscall_mutex);
schedule ();
ret = via_syscall_down (card, nonblock);
if (ret)
goto out;
}
/* grab current channel software pointer. In the case of
* recording, this is pointing to the next buffer that
* will receive data from the audio hardware.
*/
n = chan->sw_ptr;
/* n_frags represents the number of fragments waiting
* to be copied to userland. sleep until at least
* one buffer has been read from the audio hardware.
*/
add_wait_queue(&chan->wait, &wait);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
tmp = atomic_read (&chan->n_frags);
assert (tmp >= 0);
assert (tmp <= chan->frag_number);
if (tmp)
break;
if (nonblock || !chan->is_active) {
ret = -EAGAIN;
break;
}
mutex_unlock(&card->syscall_mutex);
DPRINTK ("Sleeping on block %d\n", n);
schedule();
ret = via_syscall_down (card, nonblock);
if (ret)
break;
if (signal_pending (current)) {
ret = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&chan->wait, &wait);
if (ret)
goto out;
/* Now that we have a buffer we can read from, send
* as much as sample data possible to userspace.
*/
while ((count > 0) && (chan->slop_len < chan->frag_size)) {
size_t slop_left = chan->frag_size - chan->slop_len;
void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
size = (count < slop_left) ? count : slop_left;
if (copy_to_user (userbuf,
base + ofs + chan->slop_len,
size)) {
ret = -EFAULT;
goto out;
}
count -= size;
chan->slop_len += size;
userbuf += size;
}
/* If we didn't copy the buffer completely to userspace,
* stop now.
*/
if (chan->slop_len < chan->frag_size)
goto out;
/*
* If we get to this point, we copied one buffer completely
* to userspace, give the buffer back to the hardware.
*/
/* advance channel software pointer to point to
* the next buffer from which we will copy
*/
if (chan->sw_ptr == (chan->frag_number - 1))
chan->sw_ptr = 0;
else
chan->sw_ptr++;
/* mark one less buffer waiting to be processed */
assert (atomic_read (&chan->n_frags) > 0);
atomic_dec (&chan->n_frags);
/* we are at a block boundary, there is no fragment data */
chan->slop_len = 0;
DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
n, chan->sw_ptr, atomic_read (&chan->n_frags));
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
if (count > 0)
goto handle_one_block;
out:
return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
}
static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
{
struct via_info *card;
int nonblock = (file->f_flags & O_NONBLOCK);
int rc;
DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
if (card->ch_in.is_mapped) {
rc = -ENXIO;
goto out_up;
}
via_chan_set_buffering(card, &card->ch_in, -1);
rc = via_chan_buffer_init (card, &card->ch_in);
if (rc)
goto out_up;
rc = via_dsp_do_read (card, buffer, count, nonblock);
out_up:
mutex_unlock(&card->syscall_mutex);
out:
DPRINTK ("EXIT, returning %ld\n",(long) rc);
return rc;
}
static ssize_t via_dsp_do_write (struct via_info *card,
const char __user *userbuf, size_t count,
int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
const char __user *orig_userbuf = userbuf;
struct via_channel *chan = &card->ch_out;
volatile struct via_sgd_table *sgtable = chan->sgtable;
size_t size;
int n, tmp;
ssize_t ret = 0;
handle_one_block:
/* just to be a nice neighbor */
/* Thomas Sailer:
* But also to ourselves, release semaphore if we do so */
if (need_resched()) {
mutex_unlock(&card->syscall_mutex);
schedule ();
ret = via_syscall_down (card, nonblock);
if (ret)
goto out;
}
/* grab current channel fragment pointer. In the case of
* playback, this is pointing to the next fragment that
* should receive data from userland.
*/
n = chan->sw_ptr;
/* n_frags represents the number of fragments remaining
* to be filled by userspace. Sleep until
* at least one fragment is available for our use.
*/
add_wait_queue(&chan->wait, &wait);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
tmp = atomic_read (&chan->n_frags);
assert (tmp >= 0);
assert (tmp <= chan->frag_number);
if (tmp)
break;
if (nonblock || !chan->is_active) {
ret = -EAGAIN;
break;
}
mutex_unlock(&card->syscall_mutex);
DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
schedule();
ret = via_syscall_down (card, nonblock);
if (ret)
break;
if (signal_pending (current)) {
ret = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&chan->wait, &wait);
if (ret)
goto out;
/* Now that we have at least one fragment we can write to, fill the buffer
* as much as possible with data from userspace.
*/
while ((count > 0) && (chan->slop_len < chan->frag_size)) {
size_t slop_left = chan->frag_size - chan->slop_len;
size = (count < slop_left) ? count : slop_left;
if (copy_from_user (chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size + chan->slop_len,
userbuf, size)) {
ret = -EFAULT;
goto out;
}
count -= size;
chan->slop_len += size;
userbuf += size;
}
/* If we didn't fill up the buffer with data, stop now.
* Put a 'stop' marker in the DMA table too, to tell the
* audio hardware to stop if it gets here.
*/
if (chan->slop_len < chan->frag_size) {
sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
goto out;
}
/*
* If we get to this point, we have filled a buffer with
* audio data, flush the buffer to audio hardware.
*/
/* Record the true size for the audio hardware to notice */
if (n == (chan->frag_number - 1))
sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
else
sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
/* advance channel software pointer to point to
* the next buffer we will fill with data
*/
if (chan->sw_ptr == (chan->frag_number - 1))
chan->sw_ptr = 0;
else
chan->sw_ptr++;
/* mark one less buffer as being available for userspace consumption */
assert (atomic_read (&chan->n_frags) > 0);
atomic_dec (&chan->n_frags);
/* we are at a block boundary, there is no fragment data */
chan->slop_len = 0;
/* if SGD has not yet been started, start it */
via_chan_maybe_start (chan);
DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
n, chan->sw_ptr, atomic_read (&chan->n_frags));
DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x08),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
if (count > 0)
goto handle_one_block;
out:
if (userbuf - orig_userbuf)
return userbuf - orig_userbuf;
else
return ret;
}
static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
struct via_info *card;
ssize_t rc;
int nonblock = (file->f_flags & O_NONBLOCK);
DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
rc = via_syscall_down (card, nonblock);
if (rc) goto out;
if (card->ch_out.is_mapped) {
rc = -ENXIO;
goto out_up;
}
via_chan_set_buffering(card, &card->ch_out, -1);
rc = via_chan_buffer_init (card, &card->ch_out);
if (rc)
goto out_up;
rc = via_dsp_do_write (card, buffer, count, nonblock);
out_up:
mutex_unlock(&card->syscall_mutex);
out:
DPRINTK ("EXIT, returning %ld\n",(long) rc);
return rc;
}
static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
{
struct via_info *card;
struct via_channel *chan;
unsigned int mask = 0;
DPRINTK ("ENTER\n");
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
if (file->f_mode & FMODE_READ) {
chan = &card->ch_in;
if (sg_active (chan->iobase))
poll_wait(file, &chan->wait, wait);
if (atomic_read (&chan->n_frags) > 0)
mask |= POLLIN | POLLRDNORM;
}
if (file->f_mode & FMODE_WRITE) {
chan = &card->ch_out;
if (sg_active (chan->iobase))
poll_wait(file, &chan->wait, wait);
if (atomic_read (&chan->n_frags) > 0)
mask |= POLLOUT | POLLWRNORM;
}
DPRINTK ("EXIT, returning %u\n", mask);
return mask;
}
/**
* via_dsp_drain_playback - sleep until all playback samples are flushed
* @card: Private info for specified board
* @chan: Channel to drain
* @nonblock: boolean, non-zero if O_NONBLOCK is set
*
* Sleeps until all playback has been flushed to the audio
* hardware.
*
* Locking: inside card->syscall_mutex
*/
static int via_dsp_drain_playback (struct via_info *card,
struct via_channel *chan, int nonblock)
{
DECLARE_WAITQUEUE(wait, current);
int ret = 0;
DPRINTK ("ENTER, nonblock = %d\n", nonblock);
if (chan->slop_len > 0)
via_chan_flush_frag (chan);
if (atomic_read (&chan->n_frags) == chan->frag_number)
goto out;
via_chan_maybe_start (chan);
add_wait_queue(&chan->wait, &wait);
for (;;) {
DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
__set_current_state(TASK_INTERRUPTIBLE);
if (atomic_read (&chan->n_frags) >= chan->frag_number)
break;
if (nonblock) {
DPRINTK ("EXIT, returning -EAGAIN\n");
ret = -EAGAIN;
break;
}
#ifdef VIA_DEBUG
{
u8 r40,r41,r42,r43,r44,r48;
pci_read_config_byte (card->pdev, 0x40, &r40);
pci_read_config_byte (card->pdev, 0x41, &r41);
pci_read_config_byte (card->pdev, 0x42, &r42);
pci_read_config_byte (card->pdev, 0x43, &r43);
pci_read_config_byte (card->pdev, 0x44, &r44);
pci_read_config_byte (card->pdev, 0x48, &r48);
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
r40,r41,r42,r43,r44,r48);
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
}
if (!chan->is_active)
printk (KERN_ERR "sleeping but not active\n");
#endif
mutex_unlock(&card->syscall_mutex);
DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
schedule();
if ((ret = via_syscall_down (card, nonblock)))
break;
if (signal_pending (current)) {
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
ret = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&chan->wait, &wait);
#ifdef VIA_DEBUG
{
u8 r40,r41,r42,r43,r44,r48;
pci_read_config_byte (card->pdev, 0x40, &r40);
pci_read_config_byte (card->pdev, 0x41, &r41);
pci_read_config_byte (card->pdev, 0x42, &r42);
pci_read_config_byte (card->pdev, 0x43, &r43);
pci_read_config_byte (card->pdev, 0x44, &r44);
pci_read_config_byte (card->pdev, 0x48, &r48);
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
r40,r41,r42,r43,r44,r48);
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
inb (card->baseaddr + 0x00),
inb (card->baseaddr + 0x01),
inb (card->baseaddr + 0x02),
inl (card->baseaddr + 0x04),
inl (card->baseaddr + 0x0C),
inl (card->baseaddr + 0x80),
inl (card->baseaddr + 0x84));
DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
}
#endif
out:
DPRINTK ("EXIT, returning %d\n", ret);
return ret;
}
/**
* via_dsp_ioctl_space - get information about channel buffering
* @card: Private info for specified board
* @chan: pointer to channel-specific info
* @arg: user buffer for returned information
*
* Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
*
* Locking: inside card->syscall_mutex
*/
static int via_dsp_ioctl_space (struct via_info *card,
struct via_channel *chan,
void __user *arg)
{
audio_buf_info info;
via_chan_set_buffering(card, chan, -1);
info.fragstotal = chan->frag_number;
info.fragsize = chan->frag_size;
/* number of full fragments we can read/write without blocking */
info.fragments = atomic_read (&chan->n_frags);
if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
info.fragments--;
/* number of bytes that can be read or written immediately
* without blocking.
*/
info.bytes = (info.fragments * chan->frag_size);
if (chan->slop_len % chan->frag_size > 0)
info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
info.fragstotal,
info.fragsize,
info.fragments,
info.bytes);
return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
}
/**
* via_dsp_ioctl_ptr - get information about hardware buffer ptr
* @card: Private info for specified board
* @chan: pointer to channel-specific info
* @arg: user buffer for returned information
*
* Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
*
* Locking: inside card->syscall_mutex
*/
static int via_dsp_ioctl_ptr (struct via_info *card,
struct via_channel *chan,
void __user *arg)
{
count_info info;
spin_lock_irq (&card->lock);
info.bytes = chan->bytes;
info.blocks = chan->n_irqs;
chan->n_irqs = 0;
spin_unlock_irq (&card->lock);
if (chan->is_active) {
unsigned long extra;
info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
extra = chan->frag_size - via_sg_offset(chan);
info.ptr += extra;
info.bytes += extra;
} else {
info.ptr = 0;
}
DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
info.bytes,
info.blocks,
info.ptr);
return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
}
static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
{
int enable, do_something;
if (chan->is_record)
enable = (val & PCM_ENABLE_INPUT);
else
enable = (val & PCM_ENABLE_OUTPUT);
if (!chan->is_enabled && enable) {
do_something = 1;
} else if (chan->is_enabled && !enable) {
do_something = -1;
} else {
do_something = 0;
}
DPRINTK ("enable=%d, do_something=%d\n",
enable, do_something);
if (chan->is_active && do_something)
return -EINVAL;
if (do_something == 1) {
chan->is_enabled = 1;
via_chan_maybe_start (chan);
DPRINTK ("Triggering input\n");
}
else if (do_something == -1) {
chan->is_enabled = 0;
DPRINTK ("Setup input trigger\n");
}
return 0;
}
static int via_dsp_ioctl (struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int rc, rd=0, wr=0, val=0;
struct via_info *card;
struct via_channel *chan;
int nonblock = (file->f_flags & O_NONBLOCK);
int __user *ip = (int __user *)arg;
void __user *p = (void __user *)arg;
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
if (file->f_mode & FMODE_WRITE)
wr = 1;
if (file->f_mode & FMODE_READ)
rd = 1;
rc = via_syscall_down (card, nonblock);
if (rc)
return rc;
rc = -EINVAL;
switch (cmd) {
/* OSS API version. XXX unverified */
case OSS_GETVERSION:
DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
rc = put_user (SOUND_VERSION, ip);
break;
/* list of supported PCM data formats */
case SNDCTL_DSP_GETFMTS:
DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
break;
/* query or set current channel's PCM data format */
case SNDCTL_DSP_SETFMT:
if (get_user(val, ip)) {
rc = -EFAULT;
break;
}
DPRINTK ("DSP_SETFMT, val==%d\n", val);
if (val != AFMT_QUERY) {
rc = 0;
if (rd)
rc = via_chan_set_fmt (card, &card->ch_in, val);
if (rc >= 0 && wr)
rc = via_chan_set_fmt (card, &card->ch_out, val);
if (rc < 0)
break;
val = rc;
} else {
if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
(wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
val = AFMT_S16_LE;
else
val = AFMT_U8;
}
DPRINTK ("SETFMT EXIT, returning %d\n", val);
rc = put_user (val, ip);
break;
/* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
case SNDCTL_DSP_CHANNELS:
if (get_user(val, ip)) {
rc = -EFAULT;
break;
}
DPRINTK ("DSP_CHANNELS, val==%d\n", val);
if (val != 0) {
rc = 0;
if (rd)
rc = via_chan_set_stereo (card, &card->ch_in, val);
if (rc >= 0 && wr)
rc = via_chan_set_stereo (card, &card->ch_out, val);
if (rc < 0)
break;
val = rc;
} else {
if (rd)
val = card->ch_in.channels;
else
val = card->ch_out.channels;
}
DPRINTK ("CHANNELS EXIT, returning %d\n", val);
rc = put_user (val, ip);
break;
/* enable (val is not zero) or disable (val == 0) stereo */
case SNDCTL_DSP_STEREO:
if (get_user(val, ip)) {
rc = -EFAULT;
break;
}
DPRINTK ("DSP_STEREO, val==%d\n", val);
rc = 0;
if (rd)
rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
if (rc >= 0 && wr)
rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
if (rc < 0)
break;
val = rc - 1;
DPRINTK ("STEREO EXIT, returning %d\n", val);
rc = put_user(val, ip);
break;
/* query or set sampling rate */
case SNDCTL_DSP_SPEED:
if (get_user(val, ip)) {
rc = -EFAULT;
break;
}
DPRINTK ("DSP_SPEED, val==%d\n", val);
if (val < 0) {
rc = -EINVAL;
break;
}
if (val > 0) {
rc = 0;
if (rd)
rc = via_chan_set_speed (card, &card->ch_in, val);
if (rc >= 0 && wr)
rc = via_chan_set_speed (card, &card->ch_out, val);
if (rc < 0)
break;
val = rc;
} else {
if (rd)
val = card->ch_in.rate;
else if (wr)
val = card->ch_out.rate;
else
val = 0;
}
DPRINTK ("SPEED EXIT, returning %d\n", val);
rc = put_user (val, ip);
break;
/* wait until all buffers have been played, and then stop device */
case SNDCTL_DSP_SYNC:
DPRINTK ("DSP_SYNC\n");
rc = 0;
if (wr) {
DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
}
break;
/* stop recording/playback immediately */
case SNDCTL_DSP_RESET:
DPRINTK ("DSP_RESET\n");
if (rd) {
via_chan_clear (card, &card->ch_in);
card->ch_in.frag_number = 0;
card->ch_in.frag_size = 0;
atomic_set(&card->ch_in.n_frags, 0);
}
if (wr) {
via_chan_clear (card, &card->ch_out);
card->ch_out.frag_number = 0;
card->ch_out.frag_size = 0;
atomic_set(&card->ch_out.n_frags, 0);
}
rc = 0;
break;
case SNDCTL_DSP_NONBLOCK:
file->f_flags |= O_NONBLOCK;
rc = 0;
break;
/* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
case SNDCTL_DSP_GETCAPS:
DPRINTK ("DSP_GETCAPS\n");
rc = put_user(VIA_DSP_CAP, ip);
break;
/* obtain buffer fragment size */
case SNDCTL_DSP_GETBLKSIZE:
DPRINTK ("DSP_GETBLKSIZE\n");
if (rd) {
via_chan_set_buffering(card, &card->ch_in, -1);
rc = put_user(card->ch_in.frag_size, ip);
} else if (wr) {
via_chan_set_buffering(card, &card->ch_out, -1);
rc = put_user(card->ch_out.frag_size, ip);
}
break;
/* obtain information about input buffering */
case SNDCTL_DSP_GETISPACE:
DPRINTK ("DSP_GETISPACE\n");
if (rd)
rc = via_dsp_ioctl_space (card, &card->ch_in, p);
break;
/* obtain information about output buffering */
case SNDCTL_DSP_GETOSPACE:
DPRINTK ("DSP_GETOSPACE\n");
if (wr)
rc = via_dsp_ioctl_space (card, &card->ch_out, p);
break;
/* obtain information about input hardware pointer */
case SNDCTL_DSP_GETIPTR:
DPRINTK ("DSP_GETIPTR\n");
if (rd)
rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
break;
/* obtain information about output hardware pointer */
case SNDCTL_DSP_GETOPTR:
DPRINTK ("DSP_GETOPTR\n");
if (wr)
rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
break;
/* return number of bytes remaining to be played by DMA engine */
case SNDCTL_DSP_GETODELAY:
{
DPRINTK ("DSP_GETODELAY\n");
chan = &card->ch_out;
if (!wr)
break;
if (chan->is_active) {
val = chan->frag_number - atomic_read (&chan->n_frags);
assert(val >= 0);
if (val > 0) {
val *= chan->frag_size;
val -= chan->frag_size - via_sg_offset(chan);
}
val += chan->slop_len % chan->frag_size;
} else
val = 0;
assert (val <= (chan->frag_size * chan->frag_number));
DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
rc = put_user (val, ip);
break;
}
/* handle the quick-start of a channel,
* or the notification that a quick-start will
* occur in the future
*/
case SNDCTL_DSP_SETTRIGGER:
if (get_user(val, ip)) {
rc = -EFAULT;
break;
}
DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
rd, wr, card->ch_in.is_active, card->ch_out.is_active,
card->ch_in.is_enabled, card->ch_out.is_enabled);
rc = 0;
if (rd)
rc = via_dsp_ioctl_trigger (&card->ch_in, val);
if (!rc && wr)
rc = via_dsp_ioctl_trigger (&card->ch_out, val);
break;
case SNDCTL_DSP_GETTRIGGER:
val = 0;
if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
val |= PCM_ENABLE_INPUT;
if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
val |= PCM_ENABLE_OUTPUT;
rc = put_user(val, ip);
break;
/* Enable full duplex. Since we do this as soon as we are opened
* with O_RDWR, this is mainly a no-op that always returns success.
*/
case SNDCTL_DSP_SETDUPLEX:
DPRINTK ("DSP_SETDUPLEX\n");
if (!rd || !wr)
break;
rc = 0;
break;
/* set fragment size. implemented as a successful no-op for now */
case SNDCTL_DSP_SETFRAGMENT:
if (get_user(val, ip)) {
rc = -EFAULT;
break;
}
DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
if (rd)
rc = via_chan_set_buffering(card, &card->ch_in, val);
if (wr)
rc = via_chan_set_buffering(card, &card->ch_out, val);
DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
val & 0xFFFF,
val & 0xFFFF,
(val >> 16) & 0xFFFF,
(val >> 16) & 0xFFFF);
rc = 0;
break;
/* inform device of an upcoming pause in input (or output). */
case SNDCTL_DSP_POST:
DPRINTK ("DSP_POST\n");
if (wr) {
if (card->ch_out.slop_len > 0)
via_chan_flush_frag (&card->ch_out);
via_chan_maybe_start (&card->ch_out);
}
rc = 0;
break;
/* not implemented */
default:
DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
cmd, p);
break;
}
mutex_unlock(&card->syscall_mutex);
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
static int via_dsp_open (struct inode *inode, struct file *file)
{
int minor = iminor(inode);
struct via_info *card;
struct pci_dev *pdev = NULL;
struct via_channel *chan;
struct pci_driver *drvr;
int nonblock = (file->f_flags & O_NONBLOCK);
DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
DPRINTK ("EXIT, returning -EINVAL\n");
return -EINVAL;
}
card = NULL;
while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
drvr = pci_dev_driver (pdev);
if (drvr == &via_driver) {
assert (pci_get_drvdata (pdev) != NULL);
card = pci_get_drvdata (pdev);
DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
card->dev_dsp, minor,
(card->dev_dsp ^ minor) & ~0xf);
if (((card->dev_dsp ^ minor) & ~0xf) == 0)
goto match;
}
}
DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
return -ENODEV;
match:
pci_dev_put(pdev);
if (nonblock) {
if (!mutex_trylock(&card->open_mutex)) {
DPRINTK ("EXIT, returning -EAGAIN\n");
return -EAGAIN;
}
} else {
if (mutex_lock_interruptible(&card->open_mutex)) {
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
return -ERESTARTSYS;
}
}
file->private_data = card;
DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
/* handle input from analog source */
if (file->f_mode & FMODE_READ) {
chan = &card->ch_in;
via_chan_init (card, chan);
/* why is this forced to 16-bit stereo in all drivers? */
chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
chan->channels = 2;
// TO DO - use FIFO: via_capture_fifo(card, 1);
via_chan_pcm_fmt (chan, 0);
via_set_rate (card->ac97, chan, 44100);
}
/* handle output to analog source */
if (file->f_mode & FMODE_WRITE) {
chan = &card->ch_out;
via_chan_init (card, chan);
if (file->f_mode & FMODE_READ) {
/* if in duplex mode make the recording and playback channels
have the same settings */
chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
chan->channels = 2;
via_chan_pcm_fmt (chan, 0);
via_set_rate (card->ac97, chan, 44100);
} else {
if ((minor & 0xf) == SND_DEV_DSP16) {
chan->pcm_fmt = VIA_PCM_FMT_16BIT;
via_chan_pcm_fmt (chan, 0);
via_set_rate (card->ac97, chan, 44100);
} else {
via_chan_pcm_fmt (chan, 1);
via_set_rate (card->ac97, chan, 8000);
}
}
}
DPRINTK ("EXIT, returning 0\n");
return nonseekable_open(inode, file);
}
static int via_dsp_release(struct inode *inode, struct file *file)
{
struct via_info *card;
int nonblock = (file->f_flags & O_NONBLOCK);
int rc;
DPRINTK ("ENTER\n");
assert (file != NULL);
card = file->private_data;
assert (card != NULL);
rc = via_syscall_down (card, nonblock);
if (rc) {
DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
return rc;
}
if (file->f_mode & FMODE_WRITE) {
rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
via_chan_free (card, &card->ch_out);
via_chan_buffer_free(card, &card->ch_out);
}
if (file->f_mode & FMODE_READ) {
via_chan_free (card, &card->ch_in);
via_chan_buffer_free (card, &card->ch_in);
}
mutex_unlock(&card->syscall_mutex);
mutex_unlock(&card->open_mutex);
DPRINTK ("EXIT, returning 0\n");
return 0;
}
/****************************************************************
*
* Chip setup and kernel registration
*
*
*/
static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
{
#ifdef CONFIG_MIDI_VIA82CXXX
u8 r42;
#endif
int rc;
struct via_info *card;
static int printed_version;
DPRINTK ("ENTER\n");
if (printed_version++ == 0)
printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
rc = pci_enable_device (pdev);
if (rc)
goto err_out;
rc = pci_request_regions (pdev, "via82cxxx_audio");
if (rc)
goto err_out_disable;
rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (rc)
goto err_out_res;
rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
if (rc)
goto err_out_res;
card = kmalloc (sizeof (*card), GFP_KERNEL);
if (!card) {
printk (KERN_ERR PFX "out of memory, aborting\n");
rc = -ENOMEM;
goto err_out_res;
}
pci_set_drvdata (pdev, card);
memset (card, 0, sizeof (*card));
card->pdev = pdev;
card->baseaddr = pci_resource_start (pdev, 0);
card->card_num = via_num_cards++;
spin_lock_init (&card->lock);
spin_lock_init (&card->ac97_lock);
mutex_init(&card->syscall_mutex);
mutex_init(&card->open_mutex);
/* we must init these now, in case the intr handler needs them */
via_chan_init_defaults (card, &card->ch_out);
via_chan_init_defaults (card, &card->ch_in);
via_chan_init_defaults (card, &card->ch_fm);
/* if BAR 2 is present, chip is Rev H or later,
* which means it has a few extra features */
if (pci_resource_start (pdev, 2) > 0)
card->rev_h = 1;
/* Overkill for now, but more flexible done right */
card->intmask = id->driver_data;
card->legacy = !card->intmask;
card->sixchannel = id->driver_data;
if(card->sixchannel)
printk(KERN_INFO PFX "Six channel audio available\n");
if (pdev->irq < 1) {
printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
rc = -ENODEV;
goto err_out_kfree;
}
if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
rc = -ENODEV;
goto err_out_kfree;
}
pci_set_master(pdev);
/*
* init AC97 mixer and codec
*/
rc = via_ac97_init (card);
if (rc) {
printk (KERN_ERR PFX "AC97 init failed, aborting\n");
goto err_out_kfree;
}
/*
* init DSP device
*/
rc = via_dsp_init (card);
if (rc) {
printk (KERN_ERR PFX "DSP device init failed, aborting\n");
goto err_out_have_mixer;
}
/*
* init and turn on interrupts, as the last thing we do
*/
rc = via_interrupt_init (card);
if (rc) {
printk (KERN_ERR PFX "interrupt init failed, aborting\n");
goto err_out_have_dsp;
}
printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
card->card_num + 1, card->baseaddr, pdev->irq);
#ifdef CONFIG_MIDI_VIA82CXXX
/* Disable by default */
card->midi_info.io_base = 0;
if(card->legacy)
{
pci_read_config_byte (pdev, 0x42, &r42);
/* Disable MIDI interrupt */
pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
if (r42 & VIA_CR42_MIDI_ENABLE)
{
if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
card->midi_info.io_base = pci_resource_start (pdev, 2);
else /* Address selected by byte 0x43 */
{
u8 r43;
pci_read_config_byte (pdev, 0x43, &r43);
card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
}
card->midi_info.irq = -pdev->irq;
if (probe_uart401(& card->midi_info, THIS_MODULE))
{
card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
printk("Enabled Via MIDI\n");
}
}
}
#endif
DPRINTK ("EXIT, returning 0\n");
return 0;
err_out_have_dsp:
via_dsp_cleanup (card);
err_out_have_mixer:
via_ac97_cleanup (card);
err_out_kfree:
#ifndef VIA_NDEBUG
memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
#endif
kfree (card);
err_out_res:
pci_release_regions (pdev);
err_out_disable:
pci_disable_device (pdev);
err_out:
pci_set_drvdata (pdev, NULL);
DPRINTK ("EXIT - returning %d\n", rc);
return rc;
}
static void __devexit via_remove_one (struct pci_dev *pdev)
{
struct via_info *card;
DPRINTK ("ENTER\n");
assert (pdev != NULL);
card = pci_get_drvdata (pdev);
assert (card != NULL);
#ifdef CONFIG_MIDI_VIA82CXXX
if (card->midi_info.io_base)
unload_uart401(&card->midi_info);
#endif
free_irq (card->pdev->irq, card);
via_dsp_cleanup (card);
via_ac97_cleanup (card);
#ifndef VIA_NDEBUG
memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
#endif
kfree (card);
pci_set_drvdata (pdev, NULL);
pci_release_regions (pdev);
pci_disable_device (pdev);
pci_set_power_state (pdev, 3); /* ...zzzzzz */
DPRINTK ("EXIT\n");
return;
}
/****************************************************************
*
* Driver initialization and cleanup
*
*
*/
static int __init init_via82cxxx_audio(void)
{
int rc;
DPRINTK ("ENTER\n");
rc = pci_register_driver (&via_driver);
if (rc) {
DPRINTK ("EXIT, returning %d\n", rc);
return rc;
}
DPRINTK ("EXIT, returning 0\n");
return 0;
}
static void __exit cleanup_via82cxxx_audio(void)
{
DPRINTK ("ENTER\n");
pci_unregister_driver (&via_driver);
DPRINTK ("EXIT\n");
}
module_init(init_via82cxxx_audio);
module_exit(cleanup_via82cxxx_audio);
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
MODULE_LICENSE("GPL");
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