/***********************************************************************
* 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 pt_regs *regs)
{
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, SA_INTERRUPT,
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);
