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linux/sound/oss/nec_vrc5477.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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/***********************************************************************
* Copyright 2001 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* drivers/sound/nec_vrc5477.c
* AC97 sound dirver for NEC Vrc5477 chip (an integrated,
* multi-function controller chip for MIPS CPUs)
*
* VRA support Copyright 2001 Bradley D. LaRonde <brad@ltc.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
***********************************************************************
*/
/*
* This code is derived from ite8172.c, which is written by Steve Longerbeam.
*
* Features:
* Currently we only support the following capabilities:
* . mono output to PCM L/R (line out).
* . stereo output to PCM L/R (line out).
* . mono input from PCM L (line in).
* . stereo output from PCM (line in).
* . sampling rate at 48k or variable sampling rate
* . support /dev/dsp, /dev/mixer devices, standard OSS devices.
* . only support 16-bit PCM format (hardware limit, no software
* translation)
* . support duplex, but no trigger or realtime.
*
* Specifically the following are not supported:
* . app-set frag size.
* . mmap'ed buffer access
*/
/*
* Original comments from ite8172.c file.
*/
/*
*
* Notes:
*
* 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are
* taken, slightly modified or not at all, from the ES1371 driver,
* so refer to the credits in es1371.c for those. The rest of the
* code (probe, open, read, write, the ISR, etc.) is new.
* 2. The following support is untested:
* * Memory mapping the audio buffers, and the ioctl controls that go
* with it.
* * S/PDIF output.
* 3. The following is not supported:
* * I2S input.
* * legacy audio mode.
* 4. Support for volume button interrupts is implemented but doesn't
* work yet.
*
* Revision history
* 02.08.2001 0.1 Initial release
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/sound.h>
#include <linux/slab.h>
#include <linux/soundcard.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/bitops.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/ac97_codec.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
/* -------------------debug macros -------------------------------------- */
/* #undef VRC5477_AC97_DEBUG */
#define VRC5477_AC97_DEBUG
#undef VRC5477_AC97_VERBOSE_DEBUG
/* #define VRC5477_AC97_VERBOSE_DEBUG */
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
#define VRC5477_AC97_DEBUG
#endif
#if defined(VRC5477_AC97_DEBUG)
#define ASSERT(x) if (!(x)) { \
panic("assertion failed at %s:%d: %s\n", __FILE__, __LINE__, #x); }
#else
#define ASSERT(x)
#endif /* VRC5477_AC97_DEBUG */
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
static u16 inTicket; /* check sync between intr & write */
static u16 outTicket;
#endif
/* --------------------------------------------------------------------- */
#undef OSS_DOCUMENTED_MIXER_SEMANTICS
static const unsigned sample_shift[] = { 0, 1, 1, 2 };
#define VRC5477_INT_CLR 0x0
#define VRC5477_INT_STATUS 0x0
#define VRC5477_CODEC_WR 0x4
#define VRC5477_CODEC_RD 0x8
#define VRC5477_CTRL 0x18
#define VRC5477_ACLINK_CTRL 0x1c
#define VRC5477_INT_MASK 0x24
#define VRC5477_DAC1_CTRL 0x30
#define VRC5477_DAC1L 0x34
#define VRC5477_DAC1_BADDR 0x38
#define VRC5477_DAC2_CTRL 0x3c
#define VRC5477_DAC2L 0x40
#define VRC5477_DAC2_BADDR 0x44
#define VRC5477_DAC3_CTRL 0x48
#define VRC5477_DAC3L 0x4c
#define VRC5477_DAC3_BADDR 0x50
#define VRC5477_ADC1_CTRL 0x54
#define VRC5477_ADC1L 0x58
#define VRC5477_ADC1_BADDR 0x5c
#define VRC5477_ADC2_CTRL 0x60
#define VRC5477_ADC2L 0x64
#define VRC5477_ADC2_BADDR 0x68
#define VRC5477_ADC3_CTRL 0x6c
#define VRC5477_ADC3L 0x70
#define VRC5477_ADC3_BADDR 0x74
#define VRC5477_CODEC_WR_RWC (1 << 23)
#define VRC5477_CODEC_RD_RRDYA (1 << 31)
#define VRC5477_CODEC_RD_RRDYD (1 << 30)
#define VRC5477_ACLINK_CTRL_RST_ON (1 << 15)
#define VRC5477_ACLINK_CTRL_RST_TIME 0x7f
#define VRC5477_ACLINK_CTRL_SYNC_ON (1 << 30)
#define VRC5477_ACLINK_CTRL_CK_STOP_ON (1 << 31)
#define VRC5477_CTRL_DAC2ENB (1 << 15)
#define VRC5477_CTRL_ADC2ENB (1 << 14)
#define VRC5477_CTRL_DAC1ENB (1 << 13)
#define VRC5477_CTRL_ADC1ENB (1 << 12)
#define VRC5477_INT_MASK_NMASK (1 << 31)
#define VRC5477_INT_MASK_DAC1END (1 << 5)
#define VRC5477_INT_MASK_DAC2END (1 << 4)
#define VRC5477_INT_MASK_DAC3END (1 << 3)
#define VRC5477_INT_MASK_ADC1END (1 << 2)
#define VRC5477_INT_MASK_ADC2END (1 << 1)
#define VRC5477_INT_MASK_ADC3END (1 << 0)
#define VRC5477_DMA_ACTIVATION (1 << 31)
#define VRC5477_DMA_WIP (1 << 30)
#define VRC5477_AC97_MODULE_NAME "NEC_Vrc5477_audio"
#define PFX VRC5477_AC97_MODULE_NAME ": "
/* --------------------------------------------------------------------- */
struct vrc5477_ac97_state {
/* list of vrc5477_ac97 devices */
struct list_head devs;
/* the corresponding pci_dev structure */
struct pci_dev *dev;
/* soundcore stuff */
int dev_audio;
/* hardware resources */
unsigned long io;
unsigned int irq;
#ifdef VRC5477_AC97_DEBUG
/* debug /proc entry */
struct proc_dir_entry *ps;
struct proc_dir_entry *ac97_ps;
#endif /* VRC5477_AC97_DEBUG */
struct ac97_codec *codec;
unsigned dacChannels, adcChannels;
unsigned short dacRate, adcRate;
unsigned short extended_status;
spinlock_t lock;
struct mutex open_mutex;
mode_t open_mode;
wait_queue_head_t open_wait;
struct dmabuf {
void *lbuf, *rbuf;
dma_addr_t lbufDma, rbufDma;
unsigned bufOrder;
unsigned numFrag;
unsigned fragShift;
unsigned fragSize; /* redundant */
unsigned fragTotalSize; /* = numFrag * fragSize(real) */
unsigned nextIn;
unsigned nextOut;
int count;
unsigned error; /* over/underrun */
wait_queue_head_t wait;
/* OSS stuff */
unsigned stopped:1;
unsigned ready:1;
} dma_dac, dma_adc;
#define WORK_BUF_SIZE 2048
struct {
u16 lchannel;
u16 rchannel;
} workBuf[WORK_BUF_SIZE/4];
};
/* --------------------------------------------------------------------- */
static LIST_HEAD(devs);
/* --------------------------------------------------------------------- */
static inline unsigned ld2(unsigned int x)
{
unsigned r = 0;
if (x >= 0x10000) {
x >>= 16;
r += 16;
}
if (x >= 0x100) {
x >>= 8;
r += 8;
}
if (x >= 0x10) {
x >>= 4;
r += 4;
}
if (x >= 4) {
x >>= 2;
r += 2;
}
if (x >= 2)
r++;
return r;
}
/* --------------------------------------------------------------------- */
static u16 rdcodec(struct ac97_codec *codec, u8 addr)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)codec->private_data;
unsigned long flags;
u32 result;
spin_lock_irqsave(&s->lock, flags);
/* wait until we can access codec registers */
while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
/* write the address and "read" command to codec */
addr = addr & 0x7f;
outl((addr << 16) | VRC5477_CODEC_WR_RWC, s->io + VRC5477_CODEC_WR);
/* get the return result */
udelay(100); /* workaround hardware bug */
while ( (result = inl(s->io + VRC5477_CODEC_RD)) &
(VRC5477_CODEC_RD_RRDYA | VRC5477_CODEC_RD_RRDYD) ) {
/* we get either addr or data, or both */
if (result & VRC5477_CODEC_RD_RRDYA) {
ASSERT(addr == ((result >> 16) & 0x7f) );
}
if (result & VRC5477_CODEC_RD_RRDYD) {
break;
}
}
spin_unlock_irqrestore(&s->lock, flags);
return result & 0xffff;
}
static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)codec->private_data;
unsigned long flags;
spin_lock_irqsave(&s->lock, flags);
/* wait until we can access codec registers */
while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
/* write the address and value to codec */
outl((addr << 16) | data, s->io + VRC5477_CODEC_WR);
spin_unlock_irqrestore(&s->lock, flags);
}
static void waitcodec(struct ac97_codec *codec)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)codec->private_data;
/* wait until we can access codec registers */
while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
}
static int ac97_codec_not_present(struct ac97_codec *codec)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)codec->private_data;
unsigned long flags;
unsigned short count = 0xffff;
spin_lock_irqsave(&s->lock, flags);
/* wait until we can access codec registers */
do {
if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
break;
} while (--count);
if (count == 0) {
spin_unlock_irqrestore(&s->lock, flags);
return -1;
}
/* write 0 to reset */
outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
/* test whether we get a response from ac97 chip */
count = 0xffff;
do {
if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
break;
} while (--count);
if (count == 0) {
spin_unlock_irqrestore(&s->lock, flags);
return -1;
}
spin_unlock_irqrestore(&s->lock, flags);
return 0;
}
/* --------------------------------------------------------------------- */
static void vrc5477_ac97_delay(int msec)
{
unsigned long tmo;
signed long tmo2;
if (in_interrupt())
return;
tmo = jiffies + (msec*HZ)/1000;
for (;;) {
tmo2 = tmo - jiffies;
if (tmo2 <= 0)
break;
schedule_timeout(tmo2);
}
}
static void set_adc_rate(struct vrc5477_ac97_state *s, unsigned rate)
{
wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, rate);
s->adcRate = rate;
}
static void set_dac_rate(struct vrc5477_ac97_state *s, unsigned rate)
{
if(s->extended_status & AC97_EXTSTAT_VRA) {
wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, rate);
s->dacRate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
}
}
static int ac97_codec_not_present(struct ac97_codec *codec)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)codec->private_data;
unsigned long flags;
unsigned short count = 0xffff;
spin_lock_irqsave(&s->lock, flags);
/* wait until we can access codec registers */
do {
if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
break;
} while (--count);
if (count == 0) {
spin_unlock_irqrestore(&s->lock, flags);
return -1;
}
/* write 0 to reset */
outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
/* test whether we get a response from ac97 chip */
count = 0xffff;
do {
if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
break;
} while (--count);
if (count == 0) {
spin_unlock_irqrestore(&s->lock, flags);
return -1;
}
spin_unlock_irqrestore(&s->lock, flags);
return 0;
}
/* --------------------------------------------------------------------- */
static inline void
stop_dac(struct vrc5477_ac97_state *s)
{
struct dmabuf* db = &s->dma_dac;
unsigned long flags;
u32 temp;
spin_lock_irqsave(&s->lock, flags);
if (db->stopped) {
spin_unlock_irqrestore(&s->lock, flags);
return;
}
/* deactivate the dma */
outl(0, s->io + VRC5477_DAC1_CTRL);
outl(0, s->io + VRC5477_DAC2_CTRL);
/* wait for DAM completely stop */
while (inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
while (inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
/* disable dac slots in aclink */
temp = inl(s->io + VRC5477_CTRL);
temp &= ~ (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
outl (temp, s->io + VRC5477_CTRL);
/* disable interrupts */
temp = inl(s->io + VRC5477_INT_MASK);
temp &= ~ (VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END);
outl (temp, s->io + VRC5477_INT_MASK);
/* clear pending ones */
outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
s->io + VRC5477_INT_CLR);
db->stopped = 1;
spin_unlock_irqrestore(&s->lock, flags);
}
static void start_dac(struct vrc5477_ac97_state *s)
{
struct dmabuf* db = &s->dma_dac;
unsigned long flags;
u32 dmaLength;
u32 temp;
spin_lock_irqsave(&s->lock, flags);
if (!db->stopped) {
spin_unlock_irqrestore(&s->lock, flags);
return;
}
/* we should have some data to do the DMA trasnfer */
ASSERT(db->count >= db->fragSize);
/* clear pending fales interrupts */
outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
s->io + VRC5477_INT_CLR);
/* enable interrupts */
temp = inl(s->io + VRC5477_INT_MASK);
temp |= VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
outl(temp, s->io + VRC5477_INT_MASK);
/* setup dma base addr */
outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC1_BADDR);
if (s->dacChannels == 1) {
outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
} else {
outl(db->rbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
}
/* set dma length, in the unit of 0x10 bytes */
dmaLength = db->fragSize >> 4;
outl(dmaLength, s->io + VRC5477_DAC1L);
outl(dmaLength, s->io + VRC5477_DAC2L);
/* activate dma */
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC1_CTRL);
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC2_CTRL);
/* enable dac slots - we should hear the music now! */
temp = inl(s->io + VRC5477_CTRL);
temp |= (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
outl (temp, s->io + VRC5477_CTRL);
/* it is time to setup next dma transfer */
ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
temp = db->nextOut + db->fragSize;
if (temp >= db->fragTotalSize) {
ASSERT(temp == db->fragTotalSize);
temp = 0;
}
outl(db->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
if (s->dacChannels == 1) {
outl(db->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
} else {
outl(db->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
}
db->stopped = 0;
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
outTicket = *(u16*)(db->lbuf+db->nextOut);
if (db->count > db->fragSize) {
ASSERT((u16)(outTicket+1) == *(u16*)(db->lbuf+temp));
}
#endif
spin_unlock_irqrestore(&s->lock, flags);
}
static inline void stop_adc(struct vrc5477_ac97_state *s)
{
struct dmabuf* db = &s->dma_adc;
unsigned long flags;
u32 temp;
spin_lock_irqsave(&s->lock, flags);
if (db->stopped) {
spin_unlock_irqrestore(&s->lock, flags);
return;
}
/* deactivate the dma */
outl(0, s->io + VRC5477_ADC1_CTRL);
outl(0, s->io + VRC5477_ADC2_CTRL);
/* disable adc slots in aclink */
temp = inl(s->io + VRC5477_CTRL);
temp &= ~ (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
outl (temp, s->io + VRC5477_CTRL);
/* disable interrupts */
temp = inl(s->io + VRC5477_INT_MASK);
temp &= ~ (VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END);
outl (temp, s->io + VRC5477_INT_MASK);
/* clear pending ones */
outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
s->io + VRC5477_INT_CLR);
db->stopped = 1;
spin_unlock_irqrestore(&s->lock, flags);
}
static void start_adc(struct vrc5477_ac97_state *s)
{
struct dmabuf* db = &s->dma_adc;
unsigned long flags;
u32 dmaLength;
u32 temp;
spin_lock_irqsave(&s->lock, flags);
if (!db->stopped) {
spin_unlock_irqrestore(&s->lock, flags);
return;
}
/* we should at least have some free space in the buffer */
ASSERT(db->count < db->fragTotalSize - db->fragSize * 2);
/* clear pending ones */
outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
s->io + VRC5477_INT_CLR);
/* enable interrupts */
temp = inl(s->io + VRC5477_INT_MASK);
temp |= VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
outl(temp, s->io + VRC5477_INT_MASK);
/* setup dma base addr */
outl(db->lbufDma + db->nextIn, s->io + VRC5477_ADC1_BADDR);
outl(db->rbufDma + db->nextIn, s->io + VRC5477_ADC2_BADDR);
/* setup dma length */
dmaLength = db->fragSize >> 4;
outl(dmaLength, s->io + VRC5477_ADC1L);
outl(dmaLength, s->io + VRC5477_ADC2L);
/* activate dma */
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC1_CTRL);
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC2_CTRL);
/* enable adc slots */
temp = inl(s->io + VRC5477_CTRL);
temp |= (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
outl (temp, s->io + VRC5477_CTRL);
/* it is time to setup next dma transfer */
temp = db->nextIn + db->fragSize;
if (temp >= db->fragTotalSize) {
ASSERT(temp == db->fragTotalSize);
temp = 0;
}
outl(db->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
outl(db->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
db->stopped = 0;
spin_unlock_irqrestore(&s->lock, flags);
}
/* --------------------------------------------------------------------- */
#define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
#define DMABUF_MINORDER 1
static inline void dealloc_dmabuf(struct vrc5477_ac97_state *s,
struct dmabuf *db)
{
if (db->lbuf) {
ASSERT(db->rbuf);
pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
db->lbuf, db->lbufDma);
pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
db->rbuf, db->rbufDma);
db->lbuf = db->rbuf = NULL;
}
db->nextIn = db->nextOut = 0;
db->ready = 0;
}
static int prog_dmabuf(struct vrc5477_ac97_state *s,
struct dmabuf *db,
unsigned rate)
{
int order;
unsigned bufsize;
if (!db->lbuf) {
ASSERT(!db->rbuf);
db->ready = 0;
for (order = DMABUF_DEFAULTORDER;
order >= DMABUF_MINORDER;
order--) {
db->lbuf = pci_alloc_consistent(s->dev,
PAGE_SIZE << order,
&db->lbufDma);
db->rbuf = pci_alloc_consistent(s->dev,
PAGE_SIZE << order,
&db->rbufDma);
if (db->lbuf && db->rbuf) break;
if (db->lbuf) {
ASSERT(!db->rbuf);
pci_free_consistent(s->dev,
PAGE_SIZE << order,
db->lbuf,
db->lbufDma);
}
}
if (!db->lbuf) {
ASSERT(!db->rbuf);
return -ENOMEM;
}
db->bufOrder = order;
}
db->count = 0;
db->nextIn = db->nextOut = 0;
bufsize = PAGE_SIZE << db->bufOrder;
db->fragShift = ld2(rate * 2 / 100);
if (db->fragShift < 4) db->fragShift = 4;
db->numFrag = bufsize >> db->fragShift;
while (db->numFrag < 4 && db->fragShift > 4) {
db->fragShift--;
db->numFrag = bufsize >> db->fragShift;
}
db->fragSize = 1 << db->fragShift;
db->fragTotalSize = db->numFrag << db->fragShift;
memset(db->lbuf, 0, db->fragTotalSize);
memset(db->rbuf, 0, db->fragTotalSize);
db->ready = 1;
return 0;
}
static inline int prog_dmabuf_adc(struct vrc5477_ac97_state *s)
{
stop_adc(s);
return prog_dmabuf(s, &s->dma_adc, s->adcRate);
}
static inline int prog_dmabuf_dac(struct vrc5477_ac97_state *s)
{
stop_dac(s);
return prog_dmabuf(s, &s->dma_dac, s->dacRate);
}
/* --------------------------------------------------------------------- */
/* hold spinlock for the following! */
static inline void vrc5477_ac97_adc_interrupt(struct vrc5477_ac97_state *s)
{
struct dmabuf* adc = &s->dma_adc;
unsigned temp;
/* we need two frags avaiable because one is already being used
* and the other will be used when next interrupt happens.
*/
if (adc->count >= adc->fragTotalSize - adc->fragSize) {
stop_adc(s);
adc->error++;
printk(KERN_INFO PFX "adc overrun\n");
return;
}
/* set the base addr for next DMA transfer */
temp = adc->nextIn + 2*adc->fragSize;
if (temp >= adc->fragTotalSize) {
ASSERT( (temp == adc->fragTotalSize) ||
(temp == adc->fragTotalSize + adc->fragSize) );
temp -= adc->fragTotalSize;
}
outl(adc->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
outl(adc->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
/* adjust nextIn */
adc->nextIn += adc->fragSize;
if (adc->nextIn >= adc->fragTotalSize) {
ASSERT(adc->nextIn == adc->fragTotalSize);
adc->nextIn = 0;
}
/* adjust count */
adc->count += adc->fragSize;
/* wake up anybody listening */
if (waitqueue_active(&adc->wait)) {
wake_up_interruptible(&adc->wait);
}
}
static inline void vrc5477_ac97_dac_interrupt(struct vrc5477_ac97_state *s)
{
struct dmabuf* dac = &s->dma_dac;
unsigned temp;
/* next DMA transfer should already started */
// ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
// ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
/* let us set for next next DMA transfer */
temp = dac->nextOut + dac->fragSize*2;
if (temp >= dac->fragTotalSize) {
ASSERT( (temp == dac->fragTotalSize) ||
(temp == dac->fragTotalSize + dac->fragSize) );
temp -= dac->fragTotalSize;
}
outl(dac->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
if (s->dacChannels == 1) {
outl(dac->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
} else {
outl(dac->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
}
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
if (*(u16*)(dac->lbuf + dac->nextOut) != outTicket) {
printk("assert fail: - %d vs %d\n",
*(u16*)(dac->lbuf + dac->nextOut),
outTicket);
ASSERT(1 == 0);
}
#endif
/* adjust nextOut pointer */
dac->nextOut += dac->fragSize;
if (dac->nextOut >= dac->fragTotalSize) {
ASSERT(dac->nextOut == dac->fragTotalSize);
dac->nextOut = 0;
}
/* adjust count */
dac->count -= dac->fragSize;
if (dac->count <=0 ) {
/* buffer under run */
dac->count = 0;
dac->nextIn = dac->nextOut;
stop_dac(s);
}
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
if (dac->count) {
outTicket ++;
ASSERT(*(u16*)(dac->lbuf + dac->nextOut) == outTicket);
}
#endif
/* we cannot have both under run and someone is waiting on us */
ASSERT(! (waitqueue_active(&dac->wait) && (dac->count <= 0)) );
/* wake up anybody listening */
if (waitqueue_active(&dac->wait))
wake_up_interruptible(&dac->wait);
}
static irqreturn_t vrc5477_ac97_interrupt(int irq, void *dev_id)
{
struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)dev_id;
u32 irqStatus;
u32 adcInterrupts, dacInterrupts;
spin_lock(&s->lock);
/* get irqStatus and clear the detected ones */
irqStatus = inl(s->io + VRC5477_INT_STATUS);
outl(irqStatus, s->io + VRC5477_INT_CLR);
/* let us see what we get */
dacInterrupts = VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
adcInterrupts = VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
if (irqStatus & dacInterrupts) {
/* we should get both interrupts, but just in case ... */
if (irqStatus & VRC5477_INT_MASK_DAC1END) {
vrc5477_ac97_dac_interrupt(s);
}
if ( (irqStatus & dacInterrupts) != dacInterrupts ) {
printk(KERN_WARNING "vrc5477_ac97 : dac interrupts not in sync!!!\n");
stop_dac(s);
start_dac(s);
}
} else if (irqStatus & adcInterrupts) {
/* we should get both interrupts, but just in case ... */
if(irqStatus & VRC5477_INT_MASK_ADC1END) {
vrc5477_ac97_adc_interrupt(s);
}
if ( (irqStatus & adcInterrupts) != adcInterrupts ) {
printk(KERN_WARNING "vrc5477_ac97 : adc interrupts not in sync!!!\n");
stop_adc(s);
start_adc(s);
}
}
spin_unlock(&s->lock);
return IRQ_HANDLED;
}
/* --------------------------------------------------------------------- */
static int vrc5477_ac97_open_mixdev(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
struct list_head *list;
struct vrc5477_ac97_state *s;
for (list = devs.next; ; list = list->next) {
if (list == &devs)
return -ENODEV;
s = list_entry(list, struct vrc5477_ac97_state, devs);
if (s->codec->dev_mixer == minor)
break;
}
file->private_data = s;
return nonseekable_open(inode, file);
}
static int vrc5477_ac97_release_mixdev(struct inode *inode, struct file *file)
{
return 0;
}
static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
unsigned long arg)
{
return codec->mixer_ioctl(codec, cmd, arg);
}
static int vrc5477_ac97_ioctl_mixdev(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)file->private_data;
struct ac97_codec *codec = s->codec;
return mixdev_ioctl(codec, cmd, arg);
}
static /*const*/ struct file_operations vrc5477_ac97_mixer_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = vrc5477_ac97_ioctl_mixdev,
.open = vrc5477_ac97_open_mixdev,
.release = vrc5477_ac97_release_mixdev,
};
/* --------------------------------------------------------------------- */
static int drain_dac(struct vrc5477_ac97_state *s, int nonblock)
{
unsigned long flags;
int count, tmo;
if (!s->dma_dac.ready)
return 0;
for (;;) {
spin_lock_irqsave(&s->lock, flags);
count = s->dma_dac.count;
spin_unlock_irqrestore(&s->lock, flags);
if (count <= 0)
break;
if (signal_pending(current))
break;
if (nonblock)
return -EBUSY;
tmo = 1000 * count / s->dacRate / 2;
vrc5477_ac97_delay(tmo);
}
if (signal_pending(current))
return -ERESTARTSYS;
return 0;
}
/* --------------------------------------------------------------------- */
static inline int
copy_two_channel_adc_to_user(struct vrc5477_ac97_state *s,
char *buffer,
int copyCount)
{
struct dmabuf *db = &s->dma_adc;
int bufStart = db->nextOut;
for (; copyCount > 0; ) {
int i;
int count = copyCount;
if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
for (i=0; i< count/2; i++) {
s->workBuf[i].lchannel =
*(u16*)(db->lbuf + bufStart + i*2);
s->workBuf[i].rchannel =
*(u16*)(db->rbuf + bufStart + i*2);
}
if (copy_to_user(buffer, s->workBuf, count*2)) {
return -1;
}
copyCount -= count;
bufStart += count;
ASSERT(bufStart <= db->fragTotalSize);
buffer += count *2;
}
return 0;
}
/* return the total bytes that is copied */
static inline int
copy_adc_to_user(struct vrc5477_ac97_state *s,
char * buffer,
size_t count,
int avail)
{
struct dmabuf *db = &s->dma_adc;
int copyCount=0;
int copyFragCount=0;
int totalCopyCount = 0;
int totalCopyFragCount = 0;
unsigned long flags;
/* adjust count to signel channel byte count */
count >>= s->adcChannels - 1;
/* we may have to "copy" twice as ring buffer wraps around */
for (; (avail > 0) && (count > 0); ) {
/* determine max possible copy count for single channel */
copyCount = count;
if (copyCount > avail) {
copyCount = avail;
}
if (copyCount + db->nextOut > db->fragTotalSize) {
copyCount = db->fragTotalSize - db->nextOut;
ASSERT((copyCount % db->fragSize) == 0);
}
copyFragCount = (copyCount-1) >> db->fragShift;
copyFragCount = (copyFragCount+1) << db->fragShift;
ASSERT(copyFragCount >= copyCount);
/* we copy differently based on adc channels */
if (s->adcChannels == 1) {
if (copy_to_user(buffer,
db->lbuf + db->nextOut,
copyCount))
return -1;
} else {
/* *sigh* we have to mix two streams into one */
if (copy_two_channel_adc_to_user(s, buffer, copyCount))
return -1;
}
count -= copyCount;
totalCopyCount += copyCount;
avail -= copyFragCount;
totalCopyFragCount += copyFragCount;
buffer += copyCount << (s->adcChannels-1);
db->nextOut += copyFragCount;
if (db->nextOut >= db->fragTotalSize) {
ASSERT(db->nextOut == db->fragTotalSize);
db->nextOut = 0;
}
ASSERT((copyFragCount % db->fragSize) == 0);
ASSERT( (count == 0) || (copyCount == copyFragCount));
}
spin_lock_irqsave(&s->lock, flags);
db->count -= totalCopyFragCount;
spin_unlock_irqrestore(&s->lock, flags);
return totalCopyCount << (s->adcChannels-1);
}
static ssize_t
vrc5477_ac97_read(struct file *file,
char *buffer,
size_t count,
loff_t *ppos)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)file->private_data;
struct dmabuf *db = &s->dma_adc;
ssize_t ret = 0;
unsigned long flags;
int copyCount;
size_t avail;
if (!access_ok(VERIFY_WRITE, buffer, count))
return -EFAULT;
ASSERT(db->ready);
while (count > 0) {
// wait for samples in capture buffer
do {
spin_lock_irqsave(&s->lock, flags);
if (db->stopped)
start_adc(s);
avail = db->count;
spin_unlock_irqrestore(&s->lock, flags);
if (avail <= 0) {
if (file->f_flags & O_NONBLOCK) {
if (!ret)
ret = -EAGAIN;
return ret;
}
interruptible_sleep_on(&db->wait);
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
return ret;
}
}
} while (avail <= 0);
ASSERT( (avail % db->fragSize) == 0);
copyCount = copy_adc_to_user(s, buffer, count, avail);
if (copyCount <=0 ) {
if (!ret) ret = -EFAULT;
return ret;
}
count -= copyCount;
buffer += copyCount;
ret += copyCount;
} // while (count > 0)
return ret;
}
static inline int
copy_two_channel_dac_from_user(struct vrc5477_ac97_state *s,
const char *buffer,
int copyCount)
{
struct dmabuf *db = &s->dma_dac;
int bufStart = db->nextIn;
ASSERT(db->ready);
for (; copyCount > 0; ) {
int i;
int count = copyCount;
if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
if (copy_from_user(s->workBuf, buffer, count*2)) {
return -1;
}
for (i=0; i< count/2; i++) {
*(u16*)(db->lbuf + bufStart + i*2) =
s->workBuf[i].lchannel;
*(u16*)(db->rbuf + bufStart + i*2) =
s->workBuf[i].rchannel;
}
copyCount -= count;
bufStart += count;
ASSERT(bufStart <= db->fragTotalSize);
buffer += count *2;
}
return 0;
}
/* return the total bytes that is copied */
static inline int
copy_dac_from_user(struct vrc5477_ac97_state *s,
const char *buffer,
size_t count,
int avail)
{
struct dmabuf *db = &s->dma_dac;
int copyCount=0;
int copyFragCount=0;
int totalCopyCount = 0;
int totalCopyFragCount = 0;
unsigned long flags;
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
int i;
#endif
/* adjust count to signel channel byte count */
count >>= s->dacChannels - 1;
/* we may have to "copy" twice as ring buffer wraps around */
for (; (avail > 0) && (count > 0); ) {
/* determine max possible copy count for single channel */
copyCount = count;
if (copyCount > avail) {
copyCount = avail;
}
if (copyCount + db->nextIn > db->fragTotalSize) {
copyCount = db->fragTotalSize - db->nextIn;
ASSERT(copyCount > 0);
}
copyFragCount = copyCount;
ASSERT(copyFragCount >= copyCount);
/* we copy differently based on the number channels */
if (s->dacChannels == 1) {
if (copy_from_user(db->lbuf + db->nextIn,
buffer,
copyCount))
return -1;
/* fill gaps with 0 */
memset(db->lbuf + db->nextIn + copyCount,
0,
copyFragCount - copyCount);
} else {
/* we have demux the stream into two separate ones */
if (copy_two_channel_dac_from_user(s, buffer, copyCount))
return -1;
/* fill gaps with 0 */
memset(db->lbuf + db->nextIn + copyCount,
0,
copyFragCount - copyCount);
memset(db->rbuf + db->nextIn + copyCount,
0,
copyFragCount - copyCount);
}
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
for (i=0; i< copyFragCount; i+= db->fragSize) {
*(u16*)(db->lbuf + db->nextIn + i) = inTicket ++;
}
#endif
count -= copyCount;
totalCopyCount += copyCount;
avail -= copyFragCount;
totalCopyFragCount += copyFragCount;
buffer += copyCount << (s->dacChannels - 1);
db->nextIn += copyFragCount;
if (db->nextIn >= db->fragTotalSize) {
ASSERT(db->nextIn == db->fragTotalSize);
db->nextIn = 0;
}
ASSERT( (count == 0) || (copyCount == copyFragCount));
}
spin_lock_irqsave(&s->lock, flags);
db->count += totalCopyFragCount;
if (db->stopped) {
start_dac(s);
}
/* nextIn should not be equal to nextOut unless we are full */
ASSERT( ( (db->count == db->fragTotalSize) &&
(db->nextIn == db->nextOut) ) ||
( (db->count < db->fragTotalSize) &&
(db->nextIn != db->nextOut) ) );
spin_unlock_irqrestore(&s->lock, flags);
return totalCopyCount << (s->dacChannels-1);
}
static ssize_t vrc5477_ac97_write(struct file *file, const char *buffer,
size_t count, loff_t *ppos)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)file->private_data;
struct dmabuf *db = &s->dma_dac;
ssize_t ret;
unsigned long flags;
int copyCount, avail;
if (!access_ok(VERIFY_READ, buffer, count))
return -EFAULT;
ret = 0;
while (count > 0) {
// wait for space in playback buffer
do {
spin_lock_irqsave(&s->lock, flags);
avail = db->fragTotalSize - db->count;
spin_unlock_irqrestore(&s->lock, flags);
if (avail <= 0) {
if (file->f_flags & O_NONBLOCK) {
if (!ret)
ret = -EAGAIN;
return ret;
}
interruptible_sleep_on(&db->wait);
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
return ret;
}
}
} while (avail <= 0);
copyCount = copy_dac_from_user(s, buffer, count, avail);
if (copyCount < 0) {
if (!ret) ret = -EFAULT;
return ret;
}
count -= copyCount;
buffer += copyCount;
ret += copyCount;
} // while (count > 0)
return ret;
}
/* No kernel lock - we have our own spinlock */
static unsigned int vrc5477_ac97_poll(struct file *file,
struct poll_table_struct *wait)
{
struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
unsigned long flags;
unsigned int mask = 0;
if (file->f_mode & FMODE_WRITE)
poll_wait(file, &s->dma_dac.wait, wait);
if (file->f_mode & FMODE_READ)
poll_wait(file, &s->dma_adc.wait, wait);
spin_lock_irqsave(&s->lock, flags);
if (file->f_mode & FMODE_READ) {
if (s->dma_adc.count >= (signed)s->dma_adc.fragSize)
mask |= POLLIN | POLLRDNORM;
}
if (file->f_mode & FMODE_WRITE) {
if ((signed)s->dma_dac.fragTotalSize >=
s->dma_dac.count + (signed)s->dma_dac.fragSize)
mask |= POLLOUT | POLLWRNORM;
}
spin_unlock_irqrestore(&s->lock, flags);
return mask;
}
#ifdef VRC5477_AC97_DEBUG
static struct ioctl_str_t {
unsigned int cmd;
const char* str;
} ioctl_str[] = {
{SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
{SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
{SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
{SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
{SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
{SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
{SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
{SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
{SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
{SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
{SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
{SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
{SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
{SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
{SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
{SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
{SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
{SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
{SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
{SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
{SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
{SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
{SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
{SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
{SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
{SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
{SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
{SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
{SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
{OSS_GETVERSION, "OSS_GETVERSION"},
{SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
{SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
{SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
{SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
};
#endif
static int vrc5477_ac97_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
unsigned long flags;
audio_buf_info abinfo;
int count;
int val, ret;
#ifdef VRC5477_AC97_DEBUG
for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
if (ioctl_str[count].cmd == cmd)
break;
}
if (count < sizeof(ioctl_str)/sizeof(ioctl_str[0]))
printk(KERN_INFO PFX "ioctl %s\n", ioctl_str[count].str);
else
printk(KERN_INFO PFX "ioctl unknown, 0x%x\n", cmd);
#endif
switch (cmd) {
case OSS_GETVERSION:
return put_user(SOUND_VERSION, (int *)arg);
case SNDCTL_DSP_SYNC:
if (file->f_mode & FMODE_WRITE)
return drain_dac(s, file->f_flags & O_NONBLOCK);
return 0;
case SNDCTL_DSP_SETDUPLEX:
return 0;
case SNDCTL_DSP_GETCAPS:
return put_user(DSP_CAP_DUPLEX, (int *)arg);
case SNDCTL_DSP_RESET:
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
synchronize_irq(s->irq);
s->dma_dac.count = 0;
s->dma_dac.nextIn = s->dma_dac.nextOut = 0;
}
if (file->f_mode & FMODE_READ) {
stop_adc(s);
synchronize_irq(s->irq);
s->dma_adc.count = 0;
s->dma_adc.nextIn = s->dma_adc.nextOut = 0;
}
return 0;
case SNDCTL_DSP_SPEED:
if (get_user(val, (int *)arg))
return -EFAULT;
if (val >= 0) {
if (file->f_mode & FMODE_READ) {
stop_adc(s);
set_adc_rate(s, val);
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
set_dac_rate(s, val);
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
}
return put_user((file->f_mode & FMODE_READ) ?
s->adcRate : s->dacRate, (int *)arg);
case SNDCTL_DSP_STEREO:
if (get_user(val, (int *)arg))
return -EFAULT;
if (file->f_mode & FMODE_READ) {
stop_adc(s);
if (val)
s->adcChannels = 2;
else
s->adcChannels = 1;
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
if (val)
s->dacChannels = 2;
else
s->dacChannels = 1;
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
return 0;
case SNDCTL_DSP_CHANNELS:
if (get_user(val, (int *)arg))
return -EFAULT;
if (val != 0) {
if ( (val != 1) && (val != 2)) val = 2;
if (file->f_mode & FMODE_READ) {
stop_adc(s);
s->dacChannels = val;
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
s->dacChannels = val;
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
}
return put_user(val, (int *)arg);
case SNDCTL_DSP_GETFMTS: /* Returns a mask */
return put_user(AFMT_S16_LE, (int *)arg);
case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
if (get_user(val, (int *)arg))
return -EFAULT;
if (val != AFMT_QUERY) {
if (val != AFMT_S16_LE) return -EINVAL;
if (file->f_mode & FMODE_READ) {
stop_adc(s);
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
} else {
val = AFMT_S16_LE;
}
return put_user(val, (int *)arg);
case SNDCTL_DSP_POST:
return 0;
case SNDCTL_DSP_GETTRIGGER:
case SNDCTL_DSP_SETTRIGGER:
/* NO trigger */
return -EINVAL;
case SNDCTL_DSP_GETOSPACE:
if (!(file->f_mode & FMODE_WRITE))
return -EINVAL;
abinfo.fragsize = s->dma_dac.fragSize << (s->dacChannels-1);
spin_lock_irqsave(&s->lock, flags);
count = s->dma_dac.count;
spin_unlock_irqrestore(&s->lock, flags);
abinfo.bytes = (s->dma_dac.fragTotalSize - count) <<
(s->dacChannels-1);
abinfo.fragstotal = s->dma_dac.numFrag;
abinfo.fragments = abinfo.bytes >> s->dma_dac.fragShift >>
(s->dacChannels-1);
return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
case SNDCTL_DSP_GETISPACE:
if (!(file->f_mode & FMODE_READ))
return -EINVAL;
abinfo.fragsize = s->dma_adc.fragSize << (s->adcChannels-1);
spin_lock_irqsave(&s->lock, flags);
count = s->dma_adc.count;
spin_unlock_irqrestore(&s->lock, flags);
if (count < 0)
count = 0;
abinfo.bytes = count << (s->adcChannels-1);
abinfo.fragstotal = s->dma_adc.numFrag;
abinfo.fragments = (abinfo.bytes >> s->dma_adc.fragShift) >>
(s->adcChannels-1);
return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
case SNDCTL_DSP_NONBLOCK:
file->f_flags |= O_NONBLOCK;
return 0;
case SNDCTL_DSP_GETODELAY:
if (!(file->f_mode & FMODE_WRITE))
return -EINVAL;
spin_lock_irqsave(&s->lock, flags);
count = s->dma_dac.count;
spin_unlock_irqrestore(&s->lock, flags);
return put_user(count, (int *)arg);
case SNDCTL_DSP_GETIPTR:
case SNDCTL_DSP_GETOPTR:
/* we cannot get DMA ptr */
return -EINVAL;
case SNDCTL_DSP_GETBLKSIZE:
if (file->f_mode & FMODE_WRITE)
return put_user(s->dma_dac.fragSize << (s->dacChannels-1), (int *)arg);
else
return put_user(s->dma_adc.fragSize << (s->adcChannels-1), (int *)arg);
case SNDCTL_DSP_SETFRAGMENT:
/* we ignore fragment size request */
return 0;
case SNDCTL_DSP_SUBDIVIDE:
/* what is this for? [jsun] */
return 0;
case SOUND_PCM_READ_RATE:
return put_user((file->f_mode & FMODE_READ) ?
s->adcRate : s->dacRate, (int *)arg);
case SOUND_PCM_READ_CHANNELS:
if (file->f_mode & FMODE_READ)
return put_user(s->adcChannels, (int *)arg);
else
return put_user(s->dacChannels ? 2 : 1, (int *)arg);
case SOUND_PCM_READ_BITS:
return put_user(16, (int *)arg);
case SOUND_PCM_WRITE_FILTER:
case SNDCTL_DSP_SETSYNCRO:
case SOUND_PCM_READ_FILTER:
return -EINVAL;
}
return mixdev_ioctl(s->codec, cmd, arg);
}
static int vrc5477_ac97_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
struct list_head *list;
struct vrc5477_ac97_state *s;
int ret=0;
nonseekable_open(inode, file);
for (list = devs.next; ; list = list->next) {
if (list == &devs)
return -ENODEV;
s = list_entry(list, struct vrc5477_ac97_state, devs);
if (!((s->dev_audio ^ minor) & ~0xf))
break;
}
file->private_data = s;
/* wait for device to become free */
mutex_lock(&s->open_mutex);
while (s->open_mode & file->f_mode) {
if (file->f_flags & O_NONBLOCK) {
mutex_unlock(&s->open_mutex);
return -EBUSY;
}
add_wait_queue(&s->open_wait, &wait);
__set_current_state(TASK_INTERRUPTIBLE);
mutex_unlock(&s->open_mutex);
schedule();
remove_wait_queue(&s->open_wait, &wait);
set_current_state(TASK_RUNNING);
if (signal_pending(current))
return -ERESTARTSYS;
mutex_lock(&s->open_mutex);
}
spin_lock_irqsave(&s->lock, flags);
if (file->f_mode & FMODE_READ) {
/* set default settings */
set_adc_rate(s, 48000);
s->adcChannels = 2;
ret = prog_dmabuf_adc(s);
if (ret) goto bailout;
}
if (file->f_mode & FMODE_WRITE) {
/* set default settings */
set_dac_rate(s, 48000);
s->dacChannels = 2;
ret = prog_dmabuf_dac(s);
if (ret) goto bailout;
}
s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
bailout:
spin_unlock_irqrestore(&s->lock, flags);
mutex_unlock(&s->open_mutex);
return ret;
}
static int vrc5477_ac97_release(struct inode *inode, struct file *file)
{
struct vrc5477_ac97_state *s =
(struct vrc5477_ac97_state *)file->private_data;
lock_kernel();
if (file->f_mode & FMODE_WRITE)
drain_dac(s, file->f_flags & O_NONBLOCK);
mutex_lock(&s->open_mutex);
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
dealloc_dmabuf(s, &s->dma_dac);
}
if (file->f_mode & FMODE_READ) {
stop_adc(s);
dealloc_dmabuf(s, &s->dma_adc);
}
s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
mutex_unlock(&s->open_mutex);
wake_up(&s->open_wait);
unlock_kernel();
return 0;
}
static /*const*/ struct file_operations vrc5477_ac97_audio_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = vrc5477_ac97_read,
.write = vrc5477_ac97_write,
.poll = vrc5477_ac97_poll,
.ioctl = vrc5477_ac97_ioctl,
// .mmap = vrc5477_ac97_mmap,
.open = vrc5477_ac97_open,
.release = vrc5477_ac97_release,
};
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */
/*
* for debugging purposes, we'll create a proc device that dumps the
* CODEC chipstate
*/
#ifdef VRC5477_AC97_DEBUG
struct {
const char *regname;
unsigned regaddr;
} vrc5477_ac97_regs[] = {
{"VRC5477_INT_STATUS", VRC5477_INT_STATUS},
{"VRC5477_CODEC_WR", VRC5477_CODEC_WR},
{"VRC5477_CODEC_RD", VRC5477_CODEC_RD},
{"VRC5477_CTRL", VRC5477_CTRL},
{"VRC5477_ACLINK_CTRL", VRC5477_ACLINK_CTRL},
{"VRC5477_INT_MASK", VRC5477_INT_MASK},
{"VRC5477_DAC1_CTRL", VRC5477_DAC1_CTRL},
{"VRC5477_DAC1L", VRC5477_DAC1L},
{"VRC5477_DAC1_BADDR", VRC5477_DAC1_BADDR},
{"VRC5477_DAC2_CTRL", VRC5477_DAC2_CTRL},
{"VRC5477_DAC2L", VRC5477_DAC2L},
{"VRC5477_DAC2_BADDR", VRC5477_DAC2_BADDR},
{"VRC5477_DAC3_CTRL", VRC5477_DAC3_CTRL},
{"VRC5477_DAC3L", VRC5477_DAC3L},
{"VRC5477_DAC3_BADDR", VRC5477_DAC3_BADDR},
{"VRC5477_ADC1_CTRL", VRC5477_ADC1_CTRL},
{"VRC5477_ADC1L", VRC5477_ADC1L},
{"VRC5477_ADC1_BADDR", VRC5477_ADC1_BADDR},
{"VRC5477_ADC2_CTRL", VRC5477_ADC2_CTRL},
{"VRC5477_ADC2L", VRC5477_ADC2L},
{"VRC5477_ADC2_BADDR", VRC5477_ADC2_BADDR},
{"VRC5477_ADC3_CTRL", VRC5477_ADC3_CTRL},
{"VRC5477_ADC3L", VRC5477_ADC3L},
{"VRC5477_ADC3_BADDR", VRC5477_ADC3_BADDR},
{NULL, 0x0}
};
static int proc_vrc5477_ac97_dump (char *buf, char **start, off_t fpos,
int length, int *eof, void *data)
{
struct vrc5477_ac97_state *s;
int cnt, len = 0;
if (list_empty(&devs))
return 0;
s = list_entry(devs.next, struct vrc5477_ac97_state, devs);
/* print out header */
len += sprintf(buf + len, "\n\t\tVrc5477 Audio Debug\n\n");
// print out digital controller state
len += sprintf (buf + len, "NEC Vrc5477 Audio Controller registers\n");
len += sprintf (buf + len, "---------------------------------\n");
for (cnt=0; vrc5477_ac97_regs[cnt].regname != NULL; cnt++) {
len+= sprintf (buf + len, "%-20s = %08x\n",
vrc5477_ac97_regs[cnt].regname,
inl(s->io + vrc5477_ac97_regs[cnt].regaddr));
}
/* print out driver state */
len += sprintf (buf + len, "NEC Vrc5477 Audio driver states\n");
len += sprintf (buf + len, "---------------------------------\n");
len += sprintf (buf + len, "dacChannels = %d\n", s->dacChannels);
len += sprintf (buf + len, "adcChannels = %d\n", s->adcChannels);
len += sprintf (buf + len, "dacRate = %d\n", s->dacRate);
len += sprintf (buf + len, "adcRate = %d\n", s->adcRate);
len += sprintf (buf + len, "dma_dac is %s ready\n",
s->dma_dac.ready? "" : "not");
if (s->dma_dac.ready) {
len += sprintf (buf + len, "dma_dac is %s stopped.\n",
s->dma_dac.stopped? "" : "not");
len += sprintf (buf + len, "dma_dac.fragSize = %x\n",
s->dma_dac.fragSize);
len += sprintf (buf + len, "dma_dac.fragShift = %x\n",
s->dma_dac.fragShift);
len += sprintf (buf + len, "dma_dac.numFrag = %x\n",
s->dma_dac.numFrag);
len += sprintf (buf + len, "dma_dac.fragTotalSize = %x\n",
s->dma_dac.fragTotalSize);
len += sprintf (buf + len, "dma_dac.nextIn = %x\n",
s->dma_dac.nextIn);
len += sprintf (buf + len, "dma_dac.nextOut = %x\n",
s->dma_dac.nextOut);
len += sprintf (buf + len, "dma_dac.count = %x\n",
s->dma_dac.count);
}
len += sprintf (buf + len, "dma_adc is %s ready\n",
s->dma_adc.ready? "" : "not");
if (s->dma_adc.ready) {
len += sprintf (buf + len, "dma_adc is %s stopped.\n",
s->dma_adc.stopped? "" : "not");
len += sprintf (buf + len, "dma_adc.fragSize = %x\n",
s->dma_adc.fragSize);
len += sprintf (buf + len, "dma_adc.fragShift = %x\n",
s->dma_adc.fragShift);
len += sprintf (buf + len, "dma_adc.numFrag = %x\n",
s->dma_adc.numFrag);
len += sprintf (buf + len, "dma_adc.fragTotalSize = %x\n",
s->dma_adc.fragTotalSize);
len += sprintf (buf + len, "dma_adc.nextIn = %x\n",
s->dma_adc.nextIn);
len += sprintf (buf + len, "dma_adc.nextOut = %x\n",
s->dma_adc.nextOut);
len += sprintf (buf + len, "dma_adc.count = %x\n",
s->dma_adc.count);
}
/* print out CODEC state */
len += sprintf (buf + len, "\nAC97 CODEC registers\n");
len += sprintf (buf + len, "----------------------\n");
for (cnt=0; cnt <= 0x7e; cnt = cnt +2)
len+= sprintf (buf + len, "reg %02x = %04x\n",
cnt, rdcodec(s->codec, cnt));
if (fpos >=len){
*start = buf;
*eof =1;
return 0;
}
*start = buf + fpos;
if ((len -= fpos) > length)
return length;
*eof =1;
return len;
}
#endif /* VRC5477_AC97_DEBUG */
/* --------------------------------------------------------------------- */
/* maximum number of devices; only used for command line params */
#define NR_DEVICE 5
static unsigned int devindex;
MODULE_AUTHOR("Monta Vista Software, jsun@mvista.com or jsun@junsun.net");
MODULE_DESCRIPTION("NEC Vrc5477 audio (AC97) Driver");
MODULE_LICENSE("GPL");
static int __devinit vrc5477_ac97_probe(struct pci_dev *pcidev,
const struct pci_device_id *pciid)
{
struct vrc5477_ac97_state *s;
#ifdef VRC5477_AC97_DEBUG
char proc_str[80];
#endif
if (pcidev->irq == 0)
return -1;
if (!(s = kmalloc(sizeof(struct vrc5477_ac97_state), GFP_KERNEL))) {
printk(KERN_ERR PFX "alloc of device struct failed\n");
return -1;
}
memset(s, 0, sizeof(struct vrc5477_ac97_state));
init_waitqueue_head(&s->dma_adc.wait);
init_waitqueue_head(&s->dma_dac.wait);
init_waitqueue_head(&s->open_wait);
mutex_init(&s->open_mutex);
spin_lock_init(&s->lock);
s->dev = pcidev;
s->io = pci_resource_start(pcidev, 0);
s->irq = pcidev->irq;
s->codec = ac97_alloc_codec();
s->codec->private_data = s;
s->codec->id = 0;
s->codec->codec_read = rdcodec;
s->codec->codec_write = wrcodec;
s->codec->codec_wait = waitcodec;
/* setting some other default values such as
* adcChannels, adcRate is done in open() so that
* no persistent state across file opens.
*/
/* test if get response from ac97, if not return */
if (ac97_codec_not_present(s->codec)) {
printk(KERN_ERR PFX "no ac97 codec\n");
goto err_region;
}
/* test if get response from ac97, if not return */
if (ac97_codec_not_present(&(s->codec))) {
printk(KERN_ERR PFX "no ac97 codec\n");
goto err_region;
}
if (!request_region(s->io, pci_resource_len(pcidev,0),
VRC5477_AC97_MODULE_NAME)) {
printk(KERN_ERR PFX "io ports %#lx->%#lx in use\n",
s->io, s->io + pci_resource_len(pcidev,0)-1);
goto err_region;
}
if (request_irq(s->irq, vrc5477_ac97_interrupt, IRQF_DISABLED,
VRC5477_AC97_MODULE_NAME, s)) {
printk(KERN_ERR PFX "irq %u in use\n", s->irq);
goto err_irq;
}
printk(KERN_INFO PFX "IO at %#lx, IRQ %d\n", s->io, s->irq);
/* register devices */
if ((s->dev_audio = register_sound_dsp(&vrc5477_ac97_audio_fops, -1)) < 0)
goto err_dev1;
if ((s->codec->dev_mixer =
register_sound_mixer(&vrc5477_ac97_mixer_fops, -1)) < 0)
goto err_dev2;
#ifdef VRC5477_AC97_DEBUG
/* initialize the debug proc device */
s->ps = create_proc_read_entry(VRC5477_AC97_MODULE_NAME, 0, NULL,
proc_vrc5477_ac97_dump, NULL);
#endif /* VRC5477_AC97_DEBUG */
/* enable pci io and bus mastering */
if (pci_enable_device(pcidev))
goto err_dev3;
pci_set_master(pcidev);
/* cold reset the AC97 */
outl(VRC5477_ACLINK_CTRL_RST_ON | VRC5477_ACLINK_CTRL_RST_TIME,
s->io + VRC5477_ACLINK_CTRL);
while (inl(s->io + VRC5477_ACLINK_CTRL) & VRC5477_ACLINK_CTRL_RST_ON);
/* codec init */
if (!ac97_probe_codec(s->codec))
goto err_dev3;
#ifdef VRC5477_AC97_DEBUG
sprintf(proc_str, "driver/%s/%d/ac97",
VRC5477_AC97_MODULE_NAME, s->codec->id);
s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
ac97_read_proc, s->codec);
/* TODO : why this proc file does not show up? */
#endif
/* Try to enable variable rate audio mode. */
wrcodec(s->codec, AC97_EXTENDED_STATUS,
rdcodec(s->codec, AC97_EXTENDED_STATUS) | AC97_EXTSTAT_VRA);
/* Did we enable it? */
if(rdcodec(s->codec, AC97_EXTENDED_STATUS) & AC97_EXTSTAT_VRA)
s->extended_status |= AC97_EXTSTAT_VRA;
else {
s->dacRate = 48000;
printk(KERN_INFO PFX "VRA mode not enabled; rate fixed at %d.",
s->dacRate);
}
/* let us get the default volumne louder */
wrcodec(s->codec, 0x2, 0x1010); /* master volume, middle */
wrcodec(s->codec, 0xc, 0x10); /* phone volume, middle */
// wrcodec(s->codec, 0xe, 0x10); /* misc volume, middle */
wrcodec(s->codec, 0x10, 0x8000); /* line-in 2 line-out disable */
wrcodec(s->codec, 0x18, 0x0707); /* PCM out (line out) middle */
/* by default we select line in the input */
wrcodec(s->codec, 0x1a, 0x0404);
wrcodec(s->codec, 0x1c, 0x0f0f);
wrcodec(s->codec, 0x1e, 0x07);
/* enable the master interrupt but disable all others */
outl(VRC5477_INT_MASK_NMASK, s->io + VRC5477_INT_MASK);
/* store it in the driver field */
pci_set_drvdata(pcidev, s);
pcidev->dma_mask = 0xffffffff;
/* put it into driver list */
list_add_tail(&s->devs, &devs);
/* increment devindex */
if (devindex < NR_DEVICE-1)
devindex++;
return 0;
err_dev3:
unregister_sound_mixer(s->codec->dev_mixer);
err_dev2:
unregister_sound_dsp(s->dev_audio);
err_dev1:
printk(KERN_ERR PFX "cannot register misc device\n");
free_irq(s->irq, s);
err_irq:
release_region(s->io, pci_resource_len(pcidev,0));
err_region:
ac97_release_codec(codec);
kfree(s);
return -1;
}
static void __devexit vrc5477_ac97_remove(struct pci_dev *dev)
{
struct vrc5477_ac97_state *s = pci_get_drvdata(dev);
if (!s)
return;
list_del(&s->devs);
#ifdef VRC5477_AC97_DEBUG
if (s->ps)
remove_proc_entry(VRC5477_AC97_MODULE_NAME, NULL);
#endif /* VRC5477_AC97_DEBUG */
synchronize_irq();
free_irq(s->irq, s);
release_region(s->io, pci_resource_len(dev,0));
unregister_sound_dsp(s->dev_audio);
unregister_sound_mixer(s->codec->dev_mixer);
ac97_release_codec(s->codec);
kfree(s);
pci_set_drvdata(dev, NULL);
}
static struct pci_device_id id_table[] = {
{ PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_VRC5477_AC97,
PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, id_table);
static struct pci_driver vrc5477_ac97_driver = {
.name = VRC5477_AC97_MODULE_NAME,
.id_table = id_table,
.probe = vrc5477_ac97_probe,
.remove = __devexit_p(vrc5477_ac97_remove)
};
static int __init init_vrc5477_ac97(void)
{
printk("Vrc5477 AC97 driver: version v0.2 time " __TIME__ " " __DATE__ " by Jun Sun\n");
return pci_register_driver(&vrc5477_ac97_driver);
}
static void __exit cleanup_vrc5477_ac97(void)
{
printk(KERN_INFO PFX "unloading\n");
pci_unregister_driver(&vrc5477_ac97_driver);
}
module_init(init_vrc5477_ac97);
module_exit(cleanup_vrc5477_ac97);
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