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linux/sound/oss/au1550_ac97.c
Domen Puncer bb12b76e2d [PATCH] au1xxx: oss sound support for au1200 
au1550 ac97 driver works fine on au1200 too.

Comments at the top of file state this code is GPL, so lets
mark it as GPL too.

Signed-off-by: Domen Puncer <domen.puncer@ultra.si>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25 10:01:25 -07:00

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/*
* au1550_ac97.c -- Sound driver for Alchemy Au1550 MIPS Internet Edge
* Processor.
*
* Copyright 2004 Embedded Edge, LLC
* dan@embeddededge.com
*
* Mostly copied from the au1000.c driver and some from the
* PowerMac dbdma driver.
* We assume the processor can do memory coherent DMA.
*
* Ported to 2.6 by Matt Porter <mporter@kernel.crashing.org>
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/string.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/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/pci.h>
#include <linux/bitops.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/uaccess.h>
#include <asm/hardirq.h>
#include <asm/mach-au1x00/au1xxx_psc.h>
#include <asm/mach-au1x00/au1xxx_dbdma.h>
#include <asm/mach-au1x00/au1xxx.h>
#undef OSS_DOCUMENTED_MIXER_SEMANTICS
/* misc stuff */
#define POLL_COUNT 0x50000
#define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
/* The number of DBDMA ring descriptors to allocate. No sense making
* this too large....if you can't keep up with a few you aren't likely
* to be able to with lots of them, either.
*/
#define NUM_DBDMA_DESCRIPTORS 4
#define err(format, arg...) printk(KERN_ERR format "\n" , ## arg)
/* Boot options
* 0 = no VRA, 1 = use VRA if codec supports it
*/
static int vra = 1;
module_param(vra, bool, 0);
MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
static struct au1550_state {
/* soundcore stuff */
int dev_audio;
struct ac97_codec *codec;
unsigned codec_base_caps; /* AC'97 reg 00h, "Reset Register" */
unsigned codec_ext_caps; /* AC'97 reg 28h, "Extended Audio ID" */
int no_vra; /* do not use VRA */
spinlock_t lock;
struct mutex open_mutex;
struct mutex sem;
mode_t open_mode;
wait_queue_head_t open_wait;
struct dmabuf {
u32 dmanr;
unsigned sample_rate;
unsigned src_factor;
unsigned sample_size;
int num_channels;
int dma_bytes_per_sample;
int user_bytes_per_sample;
int cnt_factor;
void *rawbuf;
unsigned buforder;
unsigned numfrag;
unsigned fragshift;
void *nextIn;
void *nextOut;
int count;
unsigned total_bytes;
unsigned error;
wait_queue_head_t wait;
/* redundant, but makes calculations easier */
unsigned fragsize;
unsigned dma_fragsize;
unsigned dmasize;
unsigned dma_qcount;
/* OSS stuff */
unsigned mapped:1;
unsigned ready:1;
unsigned stopped:1;
unsigned ossfragshift;
int ossmaxfrags;
unsigned subdivision;
} dma_dac, dma_adc;
} au1550_state;
static 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 void
au1550_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 u16
rdcodec(struct ac97_codec *codec, u8 addr)
{
struct au1550_state *s = (struct au1550_state *)codec->private_data;
unsigned long flags;
u32 cmd, val;
u16 data;
int i;
spin_lock_irqsave(&s->lock, flags);
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97STAT);
au_sync();
if (!(val & PSC_AC97STAT_CP))
break;
}
if (i == POLL_COUNT)
err("rdcodec: codec cmd pending expired!");
cmd = (u32)PSC_AC97CDC_INDX(addr);
cmd |= PSC_AC97CDC_RD; /* read command */
au_writel(cmd, PSC_AC97CDC);
au_sync();
/* now wait for the data
*/
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97STAT);
au_sync();
if (!(val & PSC_AC97STAT_CP))
break;
}
if (i == POLL_COUNT) {
err("rdcodec: read poll expired!");
data = 0;
goto out;
}
/* wait for command done?
*/
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97EVNT);
au_sync();
if (val & PSC_AC97EVNT_CD)
break;
}
if (i == POLL_COUNT) {
err("rdcodec: read cmdwait expired!");
data = 0;
goto out;
}
data = au_readl(PSC_AC97CDC) & 0xffff;
au_sync();
/* Clear command done event.
*/
au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
au_sync();
out:
spin_unlock_irqrestore(&s->lock, flags);
return data;
}
static void
wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
{
struct au1550_state *s = (struct au1550_state *)codec->private_data;
unsigned long flags;
u32 cmd, val;
int i;
spin_lock_irqsave(&s->lock, flags);
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97STAT);
au_sync();
if (!(val & PSC_AC97STAT_CP))
break;
}
if (i == POLL_COUNT)
err("wrcodec: codec cmd pending expired!");
cmd = (u32)PSC_AC97CDC_INDX(addr);
cmd |= (u32)data;
au_writel(cmd, PSC_AC97CDC);
au_sync();
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97STAT);
au_sync();
if (!(val & PSC_AC97STAT_CP))
break;
}
if (i == POLL_COUNT)
err("wrcodec: codec cmd pending expired!");
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97EVNT);
au_sync();
if (val & PSC_AC97EVNT_CD)
break;
}
if (i == POLL_COUNT)
err("wrcodec: read cmdwait expired!");
/* Clear command done event.
*/
au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
au_sync();
spin_unlock_irqrestore(&s->lock, flags);
}
static void
waitcodec(struct ac97_codec *codec)
{
u16 temp;
u32 val;
int i;
/* codec_wait is used to wait for a ready state after
* an AC97C_RESET.
*/
au1550_delay(10);
/* first poll the CODEC_READY tag bit
*/
for (i = 0; i < POLL_COUNT; i++) {
val = au_readl(PSC_AC97STAT);
au_sync();
if (val & PSC_AC97STAT_CR)
break;
}
if (i == POLL_COUNT) {
err("waitcodec: CODEC_READY poll expired!");
return;
}
/* get AC'97 powerdown control/status register
*/
temp = rdcodec(codec, AC97_POWER_CONTROL);
/* If anything is powered down, power'em up
*/
if (temp & 0x7f00) {
/* Power on
*/
wrcodec(codec, AC97_POWER_CONTROL, 0);
au1550_delay(100);
/* Reread
*/
temp = rdcodec(codec, AC97_POWER_CONTROL);
}
/* Check if Codec REF,ANL,DAC,ADC ready
*/
if ((temp & 0x7f0f) != 0x000f)
err("codec reg 26 status (0x%x) not ready!!", temp);
}
/* stop the ADC before calling */
static void
set_adc_rate(struct au1550_state *s, unsigned rate)
{
struct dmabuf *adc = &s->dma_adc;
struct dmabuf *dac = &s->dma_dac;
unsigned adc_rate, dac_rate;
u16 ac97_extstat;
if (s->no_vra) {
/* calc SRC factor
*/
adc->src_factor = ((96000 / rate) + 1) >> 1;
adc->sample_rate = 48000 / adc->src_factor;
return;
}
adc->src_factor = 1;
ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
rate = rate > 48000 ? 48000 : rate;
/* enable VRA
*/
wrcodec(s->codec, AC97_EXTENDED_STATUS,
ac97_extstat | AC97_EXTSTAT_VRA);
/* now write the sample rate
*/
wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
/* read it back for actual supported rate
*/
adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
/* some codec's don't allow unequal DAC and ADC rates, in which case
* writing one rate reg actually changes both.
*/
dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
if (dac->num_channels > 2)
wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
if (dac->num_channels > 4)
wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
adc->sample_rate = adc_rate;
dac->sample_rate = dac_rate;
}
/* stop the DAC before calling */
static void
set_dac_rate(struct au1550_state *s, unsigned rate)
{
struct dmabuf *dac = &s->dma_dac;
struct dmabuf *adc = &s->dma_adc;
unsigned adc_rate, dac_rate;
u16 ac97_extstat;
if (s->no_vra) {
/* calc SRC factor
*/
dac->src_factor = ((96000 / rate) + 1) >> 1;
dac->sample_rate = 48000 / dac->src_factor;
return;
}
dac->src_factor = 1;
ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
rate = rate > 48000 ? 48000 : rate;
/* enable VRA
*/
wrcodec(s->codec, AC97_EXTENDED_STATUS,
ac97_extstat | AC97_EXTSTAT_VRA);
/* now write the sample rate
*/
wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
/* I don't support different sample rates for multichannel,
* so make these channels the same.
*/
if (dac->num_channels > 2)
wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
if (dac->num_channels > 4)
wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
/* read it back for actual supported rate
*/
dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
/* some codec's don't allow unequal DAC and ADC rates, in which case
* writing one rate reg actually changes both.
*/
adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
dac->sample_rate = dac_rate;
adc->sample_rate = adc_rate;
}
static void
stop_dac(struct au1550_state *s)
{
struct dmabuf *db = &s->dma_dac;
u32 stat;
unsigned long flags;
if (db->stopped)
return;
spin_lock_irqsave(&s->lock, flags);
au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
au_sync();
/* Wait for Transmit Busy to show disabled.
*/
do {
stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_TB) != 0);
au1xxx_dbdma_reset(db->dmanr);
db->stopped = 1;
spin_unlock_irqrestore(&s->lock, flags);
}
static void
stop_adc(struct au1550_state *s)
{
struct dmabuf *db = &s->dma_adc;
unsigned long flags;
u32 stat;
if (db->stopped)
return;
spin_lock_irqsave(&s->lock, flags);
au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
au_sync();
/* Wait for Receive Busy to show disabled.
*/
do {
stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_RB) != 0);
au1xxx_dbdma_reset(db->dmanr);
db->stopped = 1;
spin_unlock_irqrestore(&s->lock, flags);
}
static void
set_xmit_slots(int num_channels)
{
u32 ac97_config, stat;
ac97_config = au_readl(PSC_AC97CFG);
au_sync();
ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
au_writel(ac97_config, PSC_AC97CFG);
au_sync();
switch (num_channels) {
case 6: /* stereo with surround and center/LFE,
* slots 3,4,6,7,8,9
*/
ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
case 4: /* stereo with surround, slots 3,4,7,8 */
ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
case 2: /* stereo, slots 3,4 */
case 1: /* mono */
ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
}
au_writel(ac97_config, PSC_AC97CFG);
au_sync();
ac97_config |= PSC_AC97CFG_DE_ENABLE;
au_writel(ac97_config, PSC_AC97CFG);
au_sync();
/* Wait for Device ready.
*/
do {
stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_DR) == 0);
}
static void
set_recv_slots(int num_channels)
{
u32 ac97_config, stat;
ac97_config = au_readl(PSC_AC97CFG);
au_sync();
ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
au_writel(ac97_config, PSC_AC97CFG);
au_sync();
/* Always enable slots 3 and 4 (stereo). Slot 6 is
* optional Mic ADC, which we don't support yet.
*/
ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
au_writel(ac97_config, PSC_AC97CFG);
au_sync();
ac97_config |= PSC_AC97CFG_DE_ENABLE;
au_writel(ac97_config, PSC_AC97CFG);
au_sync();
/* Wait for Device ready.
*/
do {
stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_DR) == 0);
}
/* Hold spinlock for both start_dac() and start_adc() calls */
static void
start_dac(struct au1550_state *s)
{
struct dmabuf *db = &s->dma_dac;
if (!db->stopped)
return;
set_xmit_slots(db->num_channels);
au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
au_sync();
au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
au_sync();
au1xxx_dbdma_start(db->dmanr);
db->stopped = 0;
}
static void
start_adc(struct au1550_state *s)
{
struct dmabuf *db = &s->dma_adc;
int i;
if (!db->stopped)
return;
/* Put two buffers on the ring to get things started.
*/
for (i=0; i<2; i++) {
au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize);
db->nextIn += db->dma_fragsize;
if (db->nextIn >= db->rawbuf + db->dmasize)
db->nextIn -= db->dmasize;
}
set_recv_slots(db->num_channels);
au1xxx_dbdma_start(db->dmanr);
au_writel(PSC_AC97PCR_RC, PSC_AC97PCR);
au_sync();
au_writel(PSC_AC97PCR_RS, PSC_AC97PCR);
au_sync();
db->stopped = 0;
}
static int
prog_dmabuf(struct au1550_state *s, struct dmabuf *db)
{
unsigned user_bytes_per_sec;
unsigned bufs;
unsigned rate = db->sample_rate;
if (!db->rawbuf) {
db->ready = db->mapped = 0;
db->buforder = 5; /* 32 * PAGE_SIZE */
db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL);
if (!db->rawbuf)
return -ENOMEM;
}
db->cnt_factor = 1;
if (db->sample_size == 8)
db->cnt_factor *= 2;
if (db->num_channels == 1)
db->cnt_factor *= 2;
db->cnt_factor *= db->src_factor;
db->count = 0;
db->dma_qcount = 0;
db->nextIn = db->nextOut = db->rawbuf;
db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
2 : db->num_channels);
user_bytes_per_sec = rate * db->user_bytes_per_sample;
bufs = PAGE_SIZE << db->buforder;
if (db->ossfragshift) {
if ((1000 << db->ossfragshift) < user_bytes_per_sec)
db->fragshift = ld2(user_bytes_per_sec/1000);
else
db->fragshift = db->ossfragshift;
} else {
db->fragshift = ld2(user_bytes_per_sec / 100 /
(db->subdivision ? db->subdivision : 1));
if (db->fragshift < 3)
db->fragshift = 3;
}
db->fragsize = 1 << db->fragshift;
db->dma_fragsize = db->fragsize * db->cnt_factor;
db->numfrag = bufs / db->dma_fragsize;
while (db->numfrag < 4 && db->fragshift > 3) {
db->fragshift--;
db->fragsize = 1 << db->fragshift;
db->dma_fragsize = db->fragsize * db->cnt_factor;
db->numfrag = bufs / db->dma_fragsize;
}
if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
db->numfrag = db->ossmaxfrags;
db->dmasize = db->dma_fragsize * db->numfrag;
memset(db->rawbuf, 0, bufs);
pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n",
rate, db->sample_size, db->num_channels);
pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n",
db->fragsize, db->cnt_factor, db->dma_fragsize);
pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize);
db->ready = 1;
return 0;
}
static int
prog_dmabuf_adc(struct au1550_state *s)
{
stop_adc(s);
return prog_dmabuf(s, &s->dma_adc);
}
static int
prog_dmabuf_dac(struct au1550_state *s)
{
stop_dac(s);
return prog_dmabuf(s, &s->dma_dac);
}
static void
dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct au1550_state *s = (struct au1550_state *) dev_id;
struct dmabuf *db = &s->dma_dac;
u32 ac97c_stat;
spin_lock(&s->lock);
ac97c_stat = au_readl(PSC_AC97STAT);
if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
db->dma_qcount--;
if (db->count >= db->fragsize) {
if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
db->fragsize) == 0) {
err("qcount < 2 and no ring room!");
}
db->nextOut += db->fragsize;
if (db->nextOut >= db->rawbuf + db->dmasize)
db->nextOut -= db->dmasize;
db->count -= db->fragsize;
db->total_bytes += db->dma_fragsize;
db->dma_qcount++;
}
/* wake up anybody listening */
if (waitqueue_active(&db->wait))
wake_up(&db->wait);
spin_unlock(&s->lock);
}
static void
adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct au1550_state *s = (struct au1550_state *)dev_id;
struct dmabuf *dp = &s->dma_adc;
u32 obytes;
char *obuf;
spin_lock(&s->lock);
/* Pull the buffer from the dma queue.
*/
au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
if ((dp->count + obytes) > dp->dmasize) {
/* Overrun. Stop ADC and log the error
*/
spin_unlock(&s->lock);
stop_adc(s);
dp->error++;
err("adc overrun");
return;
}
/* Put a new empty buffer on the destination DMA.
*/
au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
dp->nextIn += dp->dma_fragsize;
if (dp->nextIn >= dp->rawbuf + dp->dmasize)
dp->nextIn -= dp->dmasize;
dp->count += obytes;
dp->total_bytes += obytes;
/* wake up anybody listening
*/
if (waitqueue_active(&dp->wait))
wake_up(&dp->wait);
spin_unlock(&s->lock);
}
static loff_t
au1550_llseek(struct file *file, loff_t offset, int origin)
{
return -ESPIPE;
}
static int
au1550_open_mixdev(struct inode *inode, struct file *file)
{
file->private_data = &au1550_state;
return 0;
}
static int
au1550_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
au1550_ioctl_mixdev(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
struct ac97_codec *codec = s->codec;
return mixdev_ioctl(codec, cmd, arg);
}
static /*const */ struct file_operations au1550_mixer_fops = {
owner:THIS_MODULE,
llseek:au1550_llseek,
ioctl:au1550_ioctl_mixdev,
open:au1550_open_mixdev,
release:au1550_release_mixdev,
};
static int
drain_dac(struct au1550_state *s, int nonblock)
{
unsigned long flags;
int count, tmo;
if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
return 0;
for (;;) {
spin_lock_irqsave(&s->lock, flags);
count = s->dma_dac.count;
spin_unlock_irqrestore(&s->lock, flags);
if (count <= s->dma_dac.fragsize)
break;
if (signal_pending(current))
break;
if (nonblock)
return -EBUSY;
tmo = 1000 * count / (s->no_vra ?
48000 : s->dma_dac.sample_rate);
tmo /= s->dma_dac.dma_bytes_per_sample;
au1550_delay(tmo);
}
if (signal_pending(current))
return -ERESTARTSYS;
return 0;
}
static inline u8 S16_TO_U8(s16 ch)
{
return (u8) (ch >> 8) + 0x80;
}
static inline s16 U8_TO_S16(u8 ch)
{
return (s16) (ch - 0x80) << 8;
}
/*
* Translates user samples to dma buffer suitable for AC'97 DAC data:
* If mono, copy left channel to right channel in dma buffer.
* If 8 bit samples, cvt to 16-bit before writing to dma buffer.
* If interpolating (no VRA), duplicate every audio frame src_factor times.
*/
static int
translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
int dmacount)
{
int sample, i;
int interp_bytes_per_sample;
int num_samples;
int mono = (db->num_channels == 1);
char usersample[12];
s16 ch, dmasample[6];
if (db->sample_size == 16 && !mono && db->src_factor == 1) {
/* no translation necessary, just copy
*/
if (copy_from_user(dmabuf, userbuf, dmacount))
return -EFAULT;
return dmacount;
}
interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
num_samples = dmacount / interp_bytes_per_sample;
for (sample = 0; sample < num_samples; sample++) {
if (copy_from_user(usersample, userbuf,
db->user_bytes_per_sample)) {
return -EFAULT;
}
for (i = 0; i < db->num_channels; i++) {
if (db->sample_size == 8)
ch = U8_TO_S16(usersample[i]);
else
ch = *((s16 *) (&usersample[i * 2]));
dmasample[i] = ch;
if (mono)
dmasample[i + 1] = ch; /* right channel */
}
/* duplicate every audio frame src_factor times
*/
for (i = 0; i < db->src_factor; i++)
memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
userbuf += db->user_bytes_per_sample;
dmabuf += interp_bytes_per_sample;
}
return num_samples * interp_bytes_per_sample;
}
/*
* Translates AC'97 ADC samples to user buffer:
* If mono, send only left channel to user buffer.
* If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
* If decimating (no VRA), skip over src_factor audio frames.
*/
static int
translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
int dmacount)
{
int sample, i;
int interp_bytes_per_sample;
int num_samples;
int mono = (db->num_channels == 1);
char usersample[12];
if (db->sample_size == 16 && !mono && db->src_factor == 1) {
/* no translation necessary, just copy
*/
if (copy_to_user(userbuf, dmabuf, dmacount))
return -EFAULT;
return dmacount;
}
interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
num_samples = dmacount / interp_bytes_per_sample;
for (sample = 0; sample < num_samples; sample++) {
for (i = 0; i < db->num_channels; i++) {
if (db->sample_size == 8)
usersample[i] =
S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
else
*((s16 *) (&usersample[i * 2])) =
*((s16 *) (&dmabuf[i * 2]));
}
if (copy_to_user(userbuf, usersample,
db->user_bytes_per_sample)) {
return -EFAULT;
}
userbuf += db->user_bytes_per_sample;
dmabuf += interp_bytes_per_sample;
}
return num_samples * interp_bytes_per_sample;
}
/*
* Copy audio data to/from user buffer from/to dma buffer, taking care
* that we wrap when reading/writing the dma buffer. Returns actual byte
* count written to or read from the dma buffer.
*/
static int
copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
{
char *bufptr = to_user ? db->nextOut : db->nextIn;
char *bufend = db->rawbuf + db->dmasize;
int cnt, ret;
if (bufptr + count > bufend) {
int partial = (int) (bufend - bufptr);
if (to_user) {
if ((cnt = translate_to_user(db, userbuf,
bufptr, partial)) < 0)
return cnt;
ret = cnt;
if ((cnt = translate_to_user(db, userbuf + partial,
db->rawbuf,
count - partial)) < 0)
return cnt;
ret += cnt;
} else {
if ((cnt = translate_from_user(db, bufptr, userbuf,
partial)) < 0)
return cnt;
ret = cnt;
if ((cnt = translate_from_user(db, db->rawbuf,
userbuf + partial,
count - partial)) < 0)
return cnt;
ret += cnt;
}
} else {
if (to_user)
ret = translate_to_user(db, userbuf, bufptr, count);
else
ret = translate_from_user(db, bufptr, userbuf, count);
}
return ret;
}
static ssize_t
au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
struct dmabuf *db = &s->dma_adc;
DECLARE_WAITQUEUE(wait, current);
ssize_t ret;
unsigned long flags;
int cnt, usercnt, avail;
if (db->mapped)
return -ENXIO;
if (!access_ok(VERIFY_WRITE, buffer, count))
return -EFAULT;
ret = 0;
count *= db->cnt_factor;
mutex_lock(&s->sem);
add_wait_queue(&db->wait, &wait);
while (count > 0) {
/* wait for samples in ADC dma buffer
*/
do {
spin_lock_irqsave(&s->lock, flags);
if (db->stopped)
start_adc(s);
avail = db->count;
if (avail <= 0)
__set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irqrestore(&s->lock, flags);
if (avail <= 0) {
if (file->f_flags & O_NONBLOCK) {
if (!ret)
ret = -EAGAIN;
goto out;
}
mutex_unlock(&s->sem);
schedule();
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
goto out2;
}
mutex_lock(&s->sem);
}
} while (avail <= 0);
/* copy from nextOut to user
*/
if ((cnt = copy_dmabuf_user(db, buffer,
count > avail ?
avail : count, 1)) < 0) {
if (!ret)
ret = -EFAULT;
goto out;
}
spin_lock_irqsave(&s->lock, flags);
db->count -= cnt;
db->nextOut += cnt;
if (db->nextOut >= db->rawbuf + db->dmasize)
db->nextOut -= db->dmasize;
spin_unlock_irqrestore(&s->lock, flags);
count -= cnt;
usercnt = cnt / db->cnt_factor;
buffer += usercnt;
ret += usercnt;
} /* while (count > 0) */
out:
mutex_unlock(&s->sem);
out2:
remove_wait_queue(&db->wait, &wait);
set_current_state(TASK_RUNNING);
return ret;
}
static ssize_t
au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
struct dmabuf *db = &s->dma_dac;
DECLARE_WAITQUEUE(wait, current);
ssize_t ret = 0;
unsigned long flags;
int cnt, usercnt, avail;
pr_debug("write: count=%d\n", count);
if (db->mapped)
return -ENXIO;
if (!access_ok(VERIFY_READ, buffer, count))
return -EFAULT;
count *= db->cnt_factor;
mutex_lock(&s->sem);
add_wait_queue(&db->wait, &wait);
while (count > 0) {
/* wait for space in playback buffer
*/
do {
spin_lock_irqsave(&s->lock, flags);
avail = (int) db->dmasize - db->count;
if (avail <= 0)
__set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irqrestore(&s->lock, flags);
if (avail <= 0) {
if (file->f_flags & O_NONBLOCK) {
if (!ret)
ret = -EAGAIN;
goto out;
}
mutex_unlock(&s->sem);
schedule();
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
goto out2;
}
mutex_lock(&s->sem);
}
} while (avail <= 0);
/* copy from user to nextIn
*/
if ((cnt = copy_dmabuf_user(db, (char *) buffer,
count > avail ?
avail : count, 0)) < 0) {
if (!ret)
ret = -EFAULT;
goto out;
}
spin_lock_irqsave(&s->lock, flags);
db->count += cnt;
db->nextIn += cnt;
if (db->nextIn >= db->rawbuf + db->dmasize)
db->nextIn -= db->dmasize;
/* If the data is available, we want to keep two buffers
* on the dma queue. If the queue count reaches zero,
* we know the dma has stopped.
*/
while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
db->fragsize) == 0) {
err("qcount < 2 and no ring room!");
}
db->nextOut += db->fragsize;
if (db->nextOut >= db->rawbuf + db->dmasize)
db->nextOut -= db->dmasize;
db->total_bytes += db->dma_fragsize;
if (db->dma_qcount == 0)
start_dac(s);
db->dma_qcount++;
}
spin_unlock_irqrestore(&s->lock, flags);
count -= cnt;
usercnt = cnt / db->cnt_factor;
buffer += usercnt;
ret += usercnt;
} /* while (count > 0) */
out:
mutex_unlock(&s->sem);
out2:
remove_wait_queue(&db->wait, &wait);
set_current_state(TASK_RUNNING);
return ret;
}
/* No kernel lock - we have our own spinlock */
static unsigned int
au1550_poll(struct file *file, struct poll_table_struct *wait)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
unsigned long flags;
unsigned int mask = 0;
if (file->f_mode & FMODE_WRITE) {
if (!s->dma_dac.ready)
return 0;
poll_wait(file, &s->dma_dac.wait, wait);
}
if (file->f_mode & FMODE_READ) {
if (!s->dma_adc.ready)
return 0;
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.dma_fragsize)
mask |= POLLIN | POLLRDNORM;
}
if (file->f_mode & FMODE_WRITE) {
if (s->dma_dac.mapped) {
if (s->dma_dac.count >=
(signed)s->dma_dac.dma_fragsize)
mask |= POLLOUT | POLLWRNORM;
} else {
if ((signed) s->dma_dac.dmasize >=
s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
mask |= POLLOUT | POLLWRNORM;
}
}
spin_unlock_irqrestore(&s->lock, flags);
return mask;
}
static int
au1550_mmap(struct file *file, struct vm_area_struct *vma)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
struct dmabuf *db;
unsigned long size;
int ret = 0;
lock_kernel();
mutex_lock(&s->sem);
if (vma->vm_flags & VM_WRITE)
db = &s->dma_dac;
else if (vma->vm_flags & VM_READ)
db = &s->dma_adc;
else {
ret = -EINVAL;
goto out;
}
if (vma->vm_pgoff != 0) {
ret = -EINVAL;
goto out;
}
size = vma->vm_end - vma->vm_start;
if (size > (PAGE_SIZE << db->buforder)) {
ret = -EINVAL;
goto out;
}
if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
size, vma->vm_page_prot)) {
ret = -EAGAIN;
goto out;
}
vma->vm_flags &= ~VM_IO;
db->mapped = 1;
out:
mutex_unlock(&s->sem);
unlock_kernel();
return ret;
}
#ifdef 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_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_SETFMT, "SNDCTL_DSP_SETFMT"},
{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
dma_count_done(struct dmabuf *db)
{
if (db->stopped)
return 0;
return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
}
static int
au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
unsigned long flags;
audio_buf_info abinfo;
count_info cinfo;
int count;
int val, mapped, ret, diff;
mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
#ifdef 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]))
pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
else
pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
#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 | DSP_CAP_REALTIME |
DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
case SNDCTL_DSP_RESET:
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
synchronize_irq();
s->dma_dac.count = s->dma_dac.total_bytes = 0;
s->dma_dac.nextIn = s->dma_dac.nextOut =
s->dma_dac.rawbuf;
}
if (file->f_mode & FMODE_READ) {
stop_adc(s);
synchronize_irq();
s->dma_adc.count = s->dma_adc.total_bytes = 0;
s->dma_adc.nextIn = s->dma_adc.nextOut =
s->dma_adc.rawbuf;
}
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 (file->f_mode & FMODE_WRITE) {
stop_dac(s);
set_dac_rate(s, val);
}
if (s->open_mode & FMODE_READ)
if ((ret = prog_dmabuf_adc(s)))
return ret;
if (s->open_mode & FMODE_WRITE)
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
return put_user((file->f_mode & FMODE_READ) ?
s->dma_adc.sample_rate :
s->dma_dac.sample_rate,
(int *)arg);
case SNDCTL_DSP_STEREO:
if (get_user(val, (int *) arg))
return -EFAULT;
if (file->f_mode & FMODE_READ) {
stop_adc(s);
s->dma_adc.num_channels = val ? 2 : 1;
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
s->dma_dac.num_channels = val ? 2 : 1;
if (s->codec_ext_caps & AC97_EXT_DACS) {
/* disable surround and center/lfe in AC'97
*/
u16 ext_stat = rdcodec(s->codec,
AC97_EXTENDED_STATUS);
wrcodec(s->codec, AC97_EXTENDED_STATUS,
ext_stat | (AC97_EXTSTAT_PRI |
AC97_EXTSTAT_PRJ |
AC97_EXTSTAT_PRK));
}
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 (file->f_mode & FMODE_READ) {
if (val < 0 || val > 2)
return -EINVAL;
stop_adc(s);
s->dma_adc.num_channels = val;
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
switch (val) {
case 1:
case 2:
break;
case 3:
case 5:
return -EINVAL;
case 4:
if (!(s->codec_ext_caps &
AC97_EXTID_SDAC))
return -EINVAL;
break;
case 6:
if ((s->codec_ext_caps &
AC97_EXT_DACS) != AC97_EXT_DACS)
return -EINVAL;
break;
default:
return -EINVAL;
}
stop_dac(s);
if (val <= 2 &&
(s->codec_ext_caps & AC97_EXT_DACS)) {
/* disable surround and center/lfe
* channels in AC'97
*/
u16 ext_stat =
rdcodec(s->codec,
AC97_EXTENDED_STATUS);
wrcodec(s->codec,
AC97_EXTENDED_STATUS,
ext_stat | (AC97_EXTSTAT_PRI |
AC97_EXTSTAT_PRJ |
AC97_EXTSTAT_PRK));
} else if (val >= 4) {
/* enable surround, center/lfe
* channels in AC'97
*/
u16 ext_stat =
rdcodec(s->codec,
AC97_EXTENDED_STATUS);
ext_stat &= ~AC97_EXTSTAT_PRJ;
if (val == 6)
ext_stat &=
~(AC97_EXTSTAT_PRI |
AC97_EXTSTAT_PRK);
wrcodec(s->codec,
AC97_EXTENDED_STATUS,
ext_stat);
}
s->dma_dac.num_channels = 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 | AFMT_U8, (int *) arg);
case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
if (get_user(val, (int *) arg))
return -EFAULT;
if (val != AFMT_QUERY) {
if (file->f_mode & FMODE_READ) {
stop_adc(s);
if (val == AFMT_S16_LE)
s->dma_adc.sample_size = 16;
else {
val = AFMT_U8;
s->dma_adc.sample_size = 8;
}
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
if (val == AFMT_S16_LE)
s->dma_dac.sample_size = 16;
else {
val = AFMT_U8;
s->dma_dac.sample_size = 8;
}
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
} else {
if (file->f_mode & FMODE_READ)
val = (s->dma_adc.sample_size == 16) ?
AFMT_S16_LE : AFMT_U8;
else
val = (s->dma_dac.sample_size == 16) ?
AFMT_S16_LE : AFMT_U8;
}
return put_user(val, (int *) arg);
case SNDCTL_DSP_POST:
return 0;
case SNDCTL_DSP_GETTRIGGER:
val = 0;
spin_lock_irqsave(&s->lock, flags);
if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
val |= PCM_ENABLE_INPUT;
if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
val |= PCM_ENABLE_OUTPUT;
spin_unlock_irqrestore(&s->lock, flags);
return put_user(val, (int *) arg);
case SNDCTL_DSP_SETTRIGGER:
if (get_user(val, (int *) arg))
return -EFAULT;
if (file->f_mode & FMODE_READ) {
if (val & PCM_ENABLE_INPUT) {
spin_lock_irqsave(&s->lock, flags);
start_adc(s);
spin_unlock_irqrestore(&s->lock, flags);
} else
stop_adc(s);
}
if (file->f_mode & FMODE_WRITE) {
if (val & PCM_ENABLE_OUTPUT) {
spin_lock_irqsave(&s->lock, flags);
start_dac(s);
spin_unlock_irqrestore(&s->lock, flags);
} else
stop_dac(s);
}
return 0;
case SNDCTL_DSP_GETOSPACE:
if (!(file->f_mode & FMODE_WRITE))
return -EINVAL;
abinfo.fragsize = s->dma_dac.fragsize;
spin_lock_irqsave(&s->lock, flags);
count = s->dma_dac.count;
count -= dma_count_done(&s->dma_dac);
spin_unlock_irqrestore(&s->lock, flags);
if (count < 0)
count = 0;
abinfo.bytes = (s->dma_dac.dmasize - count) /
s->dma_dac.cnt_factor;
abinfo.fragstotal = s->dma_dac.numfrag;
abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
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;
spin_lock_irqsave(&s->lock, flags);
count = s->dma_adc.count;
count += dma_count_done(&s->dma_adc);
spin_unlock_irqrestore(&s->lock, flags);
if (count < 0)
count = 0;
abinfo.bytes = count / s->dma_adc.cnt_factor;
abinfo.fragstotal = s->dma_adc.numfrag;
abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
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;
count -= dma_count_done(&s->dma_dac);
spin_unlock_irqrestore(&s->lock, flags);
if (count < 0)
count = 0;
count /= s->dma_dac.cnt_factor;
return put_user(count, (int *) arg);
case SNDCTL_DSP_GETIPTR:
if (!(file->f_mode & FMODE_READ))
return -EINVAL;
spin_lock_irqsave(&s->lock, flags);
cinfo.bytes = s->dma_adc.total_bytes;
count = s->dma_adc.count;
if (!s->dma_adc.stopped) {
diff = dma_count_done(&s->dma_adc);
count += diff;
cinfo.bytes += diff;
cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
virt_to_phys(s->dma_adc.rawbuf);
} else
cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
virt_to_phys(s->dma_adc.rawbuf);
if (s->dma_adc.mapped)
s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
spin_unlock_irqrestore(&s->lock, flags);
if (count < 0)
count = 0;
cinfo.blocks = count >> s->dma_adc.fragshift;
return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
case SNDCTL_DSP_GETOPTR:
if (!(file->f_mode & FMODE_READ))
return -EINVAL;
spin_lock_irqsave(&s->lock, flags);
cinfo.bytes = s->dma_dac.total_bytes;
count = s->dma_dac.count;
if (!s->dma_dac.stopped) {
diff = dma_count_done(&s->dma_dac);
count -= diff;
cinfo.bytes += diff;
cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
virt_to_phys(s->dma_dac.rawbuf);
} else
cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
virt_to_phys(s->dma_dac.rawbuf);
if (s->dma_dac.mapped)
s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
spin_unlock_irqrestore(&s->lock, flags);
if (count < 0)
count = 0;
cinfo.blocks = count >> s->dma_dac.fragshift;
return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
case SNDCTL_DSP_GETBLKSIZE:
if (file->f_mode & FMODE_WRITE)
return put_user(s->dma_dac.fragsize, (int *) arg);
else
return put_user(s->dma_adc.fragsize, (int *) arg);
case SNDCTL_DSP_SETFRAGMENT:
if (get_user(val, (int *) arg))
return -EFAULT;
if (file->f_mode & FMODE_READ) {
stop_adc(s);
s->dma_adc.ossfragshift = val & 0xffff;
s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
if (s->dma_adc.ossfragshift < 4)
s->dma_adc.ossfragshift = 4;
if (s->dma_adc.ossfragshift > 15)
s->dma_adc.ossfragshift = 15;
if (s->dma_adc.ossmaxfrags < 4)
s->dma_adc.ossmaxfrags = 4;
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
s->dma_dac.ossfragshift = val & 0xffff;
s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
if (s->dma_dac.ossfragshift < 4)
s->dma_dac.ossfragshift = 4;
if (s->dma_dac.ossfragshift > 15)
s->dma_dac.ossfragshift = 15;
if (s->dma_dac.ossmaxfrags < 4)
s->dma_dac.ossmaxfrags = 4;
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
return 0;
case SNDCTL_DSP_SUBDIVIDE:
if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
(file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
return -EINVAL;
if (get_user(val, (int *) arg))
return -EFAULT;
if (val != 1 && val != 2 && val != 4)
return -EINVAL;
if (file->f_mode & FMODE_READ) {
stop_adc(s);
s->dma_adc.subdivision = val;
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
s->dma_dac.subdivision = val;
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
return 0;
case SOUND_PCM_READ_RATE:
return put_user((file->f_mode & FMODE_READ) ?
s->dma_adc.sample_rate :
s->dma_dac.sample_rate,
(int *)arg);
case SOUND_PCM_READ_CHANNELS:
if (file->f_mode & FMODE_READ)
return put_user(s->dma_adc.num_channels, (int *)arg);
else
return put_user(s->dma_dac.num_channels, (int *)arg);
case SOUND_PCM_READ_BITS:
if (file->f_mode & FMODE_READ)
return put_user(s->dma_adc.sample_size, (int *)arg);
else
return put_user(s->dma_dac.sample_size, (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
au1550_open(struct inode *inode, struct file *file)
{
int minor = MINOR(inode->i_rdev);
DECLARE_WAITQUEUE(wait, current);
struct au1550_state *s = &au1550_state;
int ret;
#ifdef DEBUG
if (file->f_flags & O_NONBLOCK)
pr_debug("open: non-blocking\n");
else
pr_debug("open: blocking\n");
#endif
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);
}
stop_dac(s);
stop_adc(s);
if (file->f_mode & FMODE_READ) {
s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
s->dma_adc.num_channels = 1;
s->dma_adc.sample_size = 8;
set_adc_rate(s, 8000);
if ((minor & 0xf) == SND_DEV_DSP16)
s->dma_adc.sample_size = 16;
}
if (file->f_mode & FMODE_WRITE) {
s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
s->dma_dac.num_channels = 1;
s->dma_dac.sample_size = 8;
set_dac_rate(s, 8000);
if ((minor & 0xf) == SND_DEV_DSP16)
s->dma_dac.sample_size = 16;
}
if (file->f_mode & FMODE_READ) {
if ((ret = prog_dmabuf_adc(s)))
return ret;
}
if (file->f_mode & FMODE_WRITE) {
if ((ret = prog_dmabuf_dac(s)))
return ret;
}
s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
mutex_unlock(&s->open_mutex);
mutex_init(&s->sem);
return 0;
}
static int
au1550_release(struct inode *inode, struct file *file)
{
struct au1550_state *s = (struct au1550_state *)file->private_data;
lock_kernel();
if (file->f_mode & FMODE_WRITE) {
unlock_kernel();
drain_dac(s, file->f_flags & O_NONBLOCK);
lock_kernel();
}
mutex_lock(&s->open_mutex);
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
kfree(s->dma_dac.rawbuf);
s->dma_dac.rawbuf = NULL;
}
if (file->f_mode & FMODE_READ) {
stop_adc(s);
kfree(s->dma_adc.rawbuf);
s->dma_adc.rawbuf = NULL;
}
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 au1550_audio_fops = {
owner: THIS_MODULE,
llseek: au1550_llseek,
read: au1550_read,
write: au1550_write,
poll: au1550_poll,
ioctl: au1550_ioctl,
mmap: au1550_mmap,
open: au1550_open,
release: au1550_release,
};
MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
MODULE_LICENSE("GPL");
static int __devinit
au1550_probe(void)
{
struct au1550_state *s = &au1550_state;
int val;
memset(s, 0, sizeof(struct au1550_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->codec = ac97_alloc_codec();
if(s->codec == NULL) {
err("Out of memory");
return -1;
}
s->codec->private_data = s;
s->codec->id = 0;
s->codec->codec_read = rdcodec;
s->codec->codec_write = wrcodec;
s->codec->codec_wait = waitcodec;
if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
0x30, "Au1550 AC97")) {
err("AC'97 ports in use");
}
/* Allocate the DMA Channels
*/
if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
err("Can't get DAC DMA");
goto err_dma1;
}
au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
NUM_DBDMA_DESCRIPTORS) == 0) {
err("Can't get DAC DMA descriptors");
goto err_dma1;
}
if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
err("Can't get ADC DMA");
goto err_dma2;
}
au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
NUM_DBDMA_DESCRIPTORS) == 0) {
err("Can't get ADC DMA descriptors");
goto err_dma2;
}
pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
/* register devices */
if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
goto err_dev1;
if ((s->codec->dev_mixer =
register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
goto err_dev2;
/* The GPIO for the appropriate PSC was configured by the
* board specific start up.
*
* configure PSC for AC'97
*/
au_writel(0, AC97_PSC_CTRL); /* Disable PSC */
au_sync();
au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
au_sync();
/* cold reset the AC'97
*/
au_writel(PSC_AC97RST_RST, PSC_AC97RST);
au_sync();
au1550_delay(10);
au_writel(0, PSC_AC97RST);
au_sync();
/* need to delay around 500msec(bleech) to give
some CODECs enough time to wakeup */
au1550_delay(500);
/* warm reset the AC'97 to start the bitclk
*/
au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
au_sync();
udelay(100);
au_writel(0, PSC_AC97RST);
au_sync();
/* Enable PSC
*/
au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
au_sync();
/* Wait for PSC ready.
*/
do {
val = au_readl(PSC_AC97STAT);
au_sync();
} while ((val & PSC_AC97STAT_SR) == 0);
/* Configure AC97 controller.
* Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
*/
val = PSC_AC97CFG_SET_LEN(16);
val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
/* Enable device so we can at least
* talk over the AC-link.
*/
au_writel(val, PSC_AC97CFG);
au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
au_sync();
val |= PSC_AC97CFG_DE_ENABLE;
au_writel(val, PSC_AC97CFG);
au_sync();
/* Wait for Device ready.
*/
do {
val = au_readl(PSC_AC97STAT);
au_sync();
} while ((val & PSC_AC97STAT_DR) == 0);
/* codec init */
if (!ac97_probe_codec(s->codec))
goto err_dev3;
s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
pr_info("AC'97 Base/Extended ID = %04x/%04x",
s->codec_base_caps, s->codec_ext_caps);
if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
/* codec does not support VRA
*/
s->no_vra = 1;
} else if (!vra) {
/* Boot option says disable VRA
*/
u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
wrcodec(s->codec, AC97_EXTENDED_STATUS,
ac97_extstat & ~AC97_EXTSTAT_VRA);
s->no_vra = 1;
}
if (s->no_vra)
pr_info("no VRA, interpolating and decimating");
/* set mic to be the recording source */
val = SOUND_MASK_MIC;
mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
(unsigned long) &val);
return 0;
err_dev3:
unregister_sound_mixer(s->codec->dev_mixer);
err_dev2:
unregister_sound_dsp(s->dev_audio);
err_dev1:
au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
err_dma2:
au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
err_dma1:
release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
ac97_release_codec(s->codec);
return -1;
}
static void __devinit
au1550_remove(void)
{
struct au1550_state *s = &au1550_state;
if (!s)
return;
synchronize_irq();
au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
unregister_sound_dsp(s->dev_audio);
unregister_sound_mixer(s->codec->dev_mixer);
ac97_release_codec(s->codec);
}
static int __init
init_au1550(void)
{
return au1550_probe();
}
static void __exit
cleanup_au1550(void)
{
au1550_remove();
}
module_init(init_au1550);
module_exit(cleanup_au1550);
#ifndef MODULE
static int __init
au1550_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ","))) {
if (!*this_opt)
continue;
if (!strncmp(this_opt, "vra", 3)) {
vra = 1;
}
}
return 1;
}
__setup("au1550_audio=", au1550_setup);
#endif /* MODULE */
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