Commit 5a820fa7 authored by Georg Chini's avatar Georg Chini Committed by David S. Miller
Browse files

[SPARC]: Make SBUS dma code similar to EBUS



From: Georg Chini <georg.chini@triaton-webhosting.com>

Introduce some sbus_dma routines similar to the
ebus_dma stuff to make the code look nearly the same
for both cases.

Thanks to Christopher for testing.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ee1858d3
......@@ -61,6 +61,14 @@ MODULE_DESCRIPTION("Sun CS4231");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Sun,CS4231}}");
#ifdef SBUS_SUPPORT
struct sbus_dma_info {
spinlock_t lock;
int dir;
void __iomem *regs;
};
#endif
typedef struct snd_cs4231 {
spinlock_t lock;
void __iomem *port;
......@@ -69,6 +77,11 @@ typedef struct snd_cs4231 {
struct ebus_dma_info eb2p;
#endif
#ifdef SBUS_SUPPORT
struct sbus_dma_info sb2c;
struct sbus_dma_info sb2p;
#endif
u32 flags;
#define CS4231_FLAG_EBUS 0x00000001
#define CS4231_FLAG_PLAYBACK 0x00000002
......@@ -251,6 +264,15 @@ static cs4231_t *cs4231_list;
#define APCPNVA 0x38UL /* APC Play DMA Next Address */
#define APCPNC 0x3cUL /* APC Play Next Count */
/* Defines for SBUS DMA-routines */
#define APCVA 0x0UL /* APC DMA Address */
#define APCC 0x4UL /* APC Count */
#define APCNVA 0x8UL /* APC DMA Next Address */
#define APCNC 0xcUL /* APC Next Count */
#define APC_PLAY 0x30UL /* Play registers start at 0x30 */
#define APC_RECORD 0x20UL /* Record registers start at 0x20 */
/* APCCSR bits */
#define APC_INT_PENDING 0x800000 /* Interrupt Pending */
......@@ -471,6 +493,103 @@ static unsigned char snd_cs4231_in(cs4231_t *chip, unsigned char reg)
return ret;
}
/*
* SBUS DMA routines
*/
#ifdef SBUS_SUPPORT
int sbus_dma_request(struct sbus_dma_info *base, dma_addr_t bus_addr, size_t len)
{
unsigned long flags;
u32 test, csr;
int err;
if (len >= (1 << 24))
return -EINVAL;
spin_lock_irqsave(&base->lock, flags);
csr = sbus_readl(base->regs + APCCSR);
err = -EINVAL;
test = APC_CDMA_READY;
if ( base->dir == APC_PLAY )
test = APC_PDMA_READY;
if (!(csr & test))
goto out;
err = -EBUSY;
csr = sbus_readl(base->regs + APCCSR);
test = APC_XINT_CNVA;
if ( base->dir == APC_PLAY )
test = APC_XINT_PNVA;
if (!(csr & test))
goto out;
err = 0;
sbus_writel(bus_addr, base->regs + base->dir + APCNVA);
sbus_writel(len, base->regs + base->dir + APCNC);
out:
spin_unlock_irqrestore(&base->lock, flags);
return err;
}
void sbus_dma_prepare(struct sbus_dma_info *base)
{
unsigned long flags;
u32 csr, test;
spin_lock_irqsave(&base->lock, flags);
csr = sbus_readl(base->regs + APCCSR);
test = APC_GENL_INT | APC_PLAY_INT | APC_XINT_ENA |
APC_XINT_PLAY | APC_XINT_PEMP | APC_XINT_GENL |
APC_XINT_PENA;
if ( base->dir == APC_RECORD )
test = APC_GENL_INT | APC_CAPT_INT | APC_XINT_ENA |
APC_XINT_CAPT | APC_XINT_CEMP | APC_XINT_GENL;
csr |= test;
sbus_writel(csr, base->regs + APCCSR);
spin_unlock_irqrestore(&base->lock, flags);
}
void sbus_dma_enable(struct sbus_dma_info *base, int on)
{
unsigned long flags;
u32 csr, shift;
spin_lock_irqsave(&base->lock, flags);
if (!on) {
if (base->dir == APC_PLAY) {
sbus_writel(0, base->regs + base->dir + APCNVA);
sbus_writel(1, base->regs + base->dir + APCC);
}
else
{
sbus_writel(0, base->regs + base->dir + APCNC);
sbus_writel(0, base->regs + base->dir + APCVA);
}
}
udelay(500);
csr = sbus_readl(base->regs + APCCSR);
shift = 0;
if ( base->dir == APC_PLAY )
shift = 1;
if (on)
csr &= ~(APC_CPAUSE << shift);
else
csr |= (APC_CPAUSE << shift);
sbus_writel(csr, base->regs + APCCSR);
if (on)
csr |= (APC_CDMA_READY << shift);
else
csr &= ~(APC_CDMA_READY << shift);
sbus_writel(csr, base->regs + APCCSR);
spin_unlock_irqrestore(&base->lock, flags);
}
unsigned int sbus_dma_addr(struct sbus_dma_info *base)
{
return sbus_readl(base->regs + base->dir + APCVA);
}
#endif
/*
* CS4231 detection / MCE routines
*/
......@@ -589,29 +708,21 @@ static void snd_cs4231_ebus_advance_dma(struct ebus_dma_info *p, snd_pcm_substre
#endif
#ifdef SBUS_SUPPORT
static void snd_cs4231_sbus_advance_dma(snd_pcm_substream_t *substream, unsigned int *periods_sent)
static void snd_cs4231_sbus_advance_dma(struct sbus_dma_info *p, snd_pcm_substream_t *substream, unsigned int *periods_sent)
{
cs4231_t *chip = snd_pcm_substream_chip(substream);
snd_pcm_runtime_t *runtime = substream->runtime;
unsigned int period_size = snd_pcm_lib_period_bytes(substream);
unsigned int offset = period_size * (*periods_sent % runtime->periods);
if (runtime->period_size > 0xffff + 1)
BUG();
switch (substream->stream) {
case SNDRV_PCM_STREAM_PLAYBACK:
sbus_writel(runtime->dma_addr + offset, chip->port + APCPNVA);
sbus_writel(period_size, chip->port + APCPNC);
break;
case SNDRV_PCM_STREAM_CAPTURE:
sbus_writel(runtime->dma_addr + offset, chip->port + APCCNVA);
sbus_writel(period_size, chip->port + APCCNC);
break;
}
while (1) {
unsigned int period_size = snd_pcm_lib_period_bytes(substream);
unsigned int offset = period_size * (*periods_sent);
(*periods_sent) = (*periods_sent + 1) % runtime->periods;
if (period_size > 0xffff + 1)
BUG();
if (sbus_dma_request(p, runtime->dma_addr + offset, period_size))
return;
(*periods_sent) = (*periods_sent + 1) % runtime->periods;
}
}
#endif
......@@ -646,59 +757,27 @@ static void cs4231_dma_trigger(snd_pcm_substream_t *substream, unsigned int what
} else {
#endif
#ifdef SBUS_SUPPORT
u32 csr = sbus_readl(chip->port + APCCSR);
/* I don't know why, but on sbus the period counter must
* only start counting after the first period is sent.
* Therefore this dummy thing.
*/
unsigned int dummy = 0;
switch (what) {
case CS4231_PLAYBACK_ENABLE:
if (what & CS4231_PLAYBACK_ENABLE) {
if (on) {
csr &= ~APC_XINT_PLAY;
sbus_writel(csr, chip->port + APCCSR);
csr &= ~APC_PPAUSE;
sbus_writel(csr, chip->port + APCCSR);
snd_cs4231_sbus_advance_dma(substream, &dummy);
csr |= APC_GENL_INT | APC_PLAY_INT | APC_XINT_ENA |
APC_XINT_PLAY | APC_XINT_EMPT | APC_XINT_GENL |
APC_XINT_PENA | APC_PDMA_READY;
sbus_writel(csr, chip->port + APCCSR);
sbus_dma_prepare(&chip->sb2p);
sbus_dma_enable(&chip->sb2p, 1);
snd_cs4231_sbus_advance_dma(&chip->sb2p,
chip->playback_substream,
&chip->p_periods_sent);
} else {
csr |= APC_PPAUSE;
sbus_writel(csr, chip->port + APCCSR);
csr &= ~APC_PDMA_READY;
sbus_writel(csr, chip->port + APCCSR);
sbus_dma_enable(&chip->sb2p, 0);
}
break;
case CS4231_RECORD_ENABLE:
}
if (what & CS4231_RECORD_ENABLE) {
if (on) {
csr &= ~APC_XINT_CAPT;
sbus_writel(csr, chip->port + APCCSR);
csr &= ~APC_CPAUSE;
sbus_writel(csr, chip->port + APCCSR);
snd_cs4231_sbus_advance_dma(substream, &dummy);
csr |= APC_GENL_INT | APC_CAPT_INT | APC_XINT_ENA |
APC_XINT_CAPT | APC_XINT_CEMP | APC_XINT_GENL |
APC_CDMA_READY;
sbus_writel(csr, chip->port + APCCSR);
sbus_dma_prepare(&chip->sb2c);
sbus_dma_enable(&chip->sb2c, 1);
snd_cs4231_sbus_advance_dma(&chip->sb2c,
chip->capture_substream,
&chip->c_periods_sent);
} else {
csr |= APC_CPAUSE;
sbus_writel(csr, chip->port + APCCSR);
csr &= ~APC_CDMA_READY;
sbus_writel(csr, chip->port + APCCSR);
sbus_dma_enable(&chip->sb2c, 0);
}
break;
}
#endif
#ifdef EBUS_SUPPORT
......@@ -1136,10 +1215,7 @@ static int snd_cs4231_playback_prepare(snd_pcm_substream_t *substream)
if (runtime->period_size > 0xffff + 1)
BUG();
snd_cs4231_out(chip, CS4231_PLY_LWR_CNT, (runtime->period_size - 1) & 0x00ff);
snd_cs4231_out(chip, CS4231_PLY_UPR_CNT, (runtime->period_size - 1) >> 8 & 0x00ff);
chip->p_periods_sent = 0;
spin_unlock_irqrestore(&chip->lock, flags);
return 0;
......@@ -1171,16 +1247,14 @@ static int snd_cs4231_capture_hw_free(snd_pcm_substream_t *substream)
static int snd_cs4231_capture_prepare(snd_pcm_substream_t *substream)
{
cs4231_t *chip = snd_pcm_substream_chip(substream);
snd_pcm_runtime_t *runtime = substream->runtime;
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE |
CS4231_RECORD_PIO);
snd_cs4231_out(chip, CS4231_REC_LWR_CNT, (runtime->period_size - 1) & 0x00ff);
snd_cs4231_out(chip, CS4231_REC_LWR_CNT, (runtime->period_size - 1) >> 8 & 0x00ff);
chip->c_periods_sent = 0;
spin_unlock_irqrestore(&chip->lock, flags);
return 0;
......@@ -1199,40 +1273,20 @@ static void snd_cs4231_overrange(cs4231_t *chip)
chip->capture_substream->runtime->overrange++;
}
static irqreturn_t snd_cs4231_generic_interrupt(cs4231_t *chip)
#ifdef SBUS_SUPPORT
static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned long flags;
unsigned char status;
u32 csr;
cs4231_t *chip = dev_id;
/*This is IRQ is not raised by the cs4231*/
if (!(__cs4231_readb(chip, CS4231P(chip, STATUS)) & CS4231_GLOBALIRQ))
return IRQ_NONE;
status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
if (status & CS4231_TIMER_IRQ) {
if (chip->timer)
snd_timer_interrupt(chip->timer, chip->timer->sticks);
}
if (status & CS4231_RECORD_IRQ)
snd_cs4231_overrange(chip);
/* ACK the CS4231 interrupt. */
spin_lock_irqsave(&chip->lock, flags);
snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
spin_unlock_irqrestore(&chip->lock, flags);
return 0;
}
#ifdef SBUS_SUPPORT
static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
cs4231_t *chip = dev_id;
/* ACK the APC interrupt. */
u32 csr = sbus_readl(chip->port + APCCSR);
csr = sbus_readl(chip->port + APCCSR);
sbus_writel(csr, chip->port + APCCSR);
......@@ -1240,20 +1294,36 @@ static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id, struct pt_re
(csr & APC_PLAY_INT) &&
(csr & APC_XINT_PNVA) &&
!(csr & APC_XINT_EMPT)) {
snd_cs4231_sbus_advance_dma(chip->playback_substream,
&chip->p_periods_sent);
snd_pcm_period_elapsed(chip->playback_substream);
snd_cs4231_sbus_advance_dma(&chip->sb2p, chip->playback_substream,
&chip->p_periods_sent);
}
if ((chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) &&
(csr & APC_CAPT_INT) &&
(csr & APC_XINT_CNVA)) {
snd_cs4231_sbus_advance_dma(chip->capture_substream,
&chip->c_periods_sent);
(csr & APC_XINT_CNVA) &&
!(csr & APC_XINT_EMPT)) {
snd_pcm_period_elapsed(chip->capture_substream);
snd_cs4231_sbus_advance_dma(&chip->sb2c,chip->capture_substream,
&chip->c_periods_sent);
}
status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
if (status & CS4231_TIMER_IRQ) {
if (chip->timer)
snd_timer_interrupt(chip->timer, chip->timer->sticks);
}
if (status & CS4231_RECORD_IRQ)
snd_cs4231_overrange(chip);
return snd_cs4231_generic_interrupt(chip);
/* ACK the CS4231 interrupt. */
spin_lock_irqsave(&chip->lock, flags);
snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
spin_unlock_irqrestore(&chip->lock, flags);
return 0;
}
#endif
......@@ -1284,24 +1354,29 @@ static void snd_cs4231_ebus_capture_callback(struct ebus_dma_info *p, int event,
static snd_pcm_uframes_t snd_cs4231_playback_pointer(snd_pcm_substream_t *substream)
{
cs4231_t *chip = snd_pcm_substream_chip(substream);
size_t ptr, residue, period_bytes;
size_t ptr;
#ifdef EBUS_SUPPORT
size_t residue, period_bytes;
#endif
if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
return 0;
#ifdef EBUS_SUPPORT
period_bytes = snd_pcm_lib_period_bytes(substream);
ptr = period_bytes * chip->p_periods_sent;
#ifdef EBUS_SUPPORT
if (chip->flags & CS4231_FLAG_EBUS) {
residue = ebus_dma_residue(&chip->eb2p);
ptr += period_bytes - residue;
} else {
#endif
#ifdef SBUS_SUPPORT
residue = sbus_readl(chip->port + APCPC);
ptr = sbus_dma_addr(&chip->sb2p);
if (ptr != 0)
ptr -= substream->runtime->dma_addr;
#endif
#ifdef EBUS_SUPPORT
}
#endif
ptr += period_bytes - residue;
return bytes_to_frames(substream->runtime, ptr);
}
......@@ -1309,24 +1384,29 @@ static snd_pcm_uframes_t snd_cs4231_playback_pointer(snd_pcm_substream_t *substr
static snd_pcm_uframes_t snd_cs4231_capture_pointer(snd_pcm_substream_t * substream)
{
cs4231_t *chip = snd_pcm_substream_chip(substream);
size_t ptr, residue, period_bytes;
size_t ptr;
#ifdef EBUS_SUPPORT
size_t residue, period_bytes;
#endif
if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
return 0;
#ifdef EBUS_SUPPORT
period_bytes = snd_pcm_lib_period_bytes(substream);
ptr = period_bytes * chip->c_periods_sent;
#ifdef EBUS_SUPPORT
if (chip->flags & CS4231_FLAG_EBUS) {
residue = ebus_dma_residue(&chip->eb2c);
ptr += period_bytes - residue;
} else {
#endif
#ifdef SBUS_SUPPORT
residue = sbus_readl(chip->port + APCCC);
ptr = sbus_dma_addr(&chip->sb2c);
if (ptr != 0)
ptr -= substream->runtime->dma_addr;
#endif
#ifdef EBUS_SUPPORT
}
#endif
ptr += period_bytes - residue;
return bytes_to_frames(substream->runtime, ptr);
}
......@@ -1983,6 +2063,8 @@ static int __init snd_cs4231_sbus_create(snd_card_t *card,
return -ENOMEM;
spin_lock_init(&chip->lock);
spin_lock_init(&chip->sb2c.lock);
spin_lock_init(&chip->sb2p.lock);
init_MUTEX(&chip->mce_mutex);
init_MUTEX(&chip->open_mutex);
chip->card = card;
......@@ -1998,6 +2080,11 @@ static int __init snd_cs4231_sbus_create(snd_card_t *card,
return -EIO;
}
chip->sb2c.regs = chip->port;
chip->sb2p.regs = chip->port;
chip->sb2c.dir = APC_RECORD;
chip->sb2p.dir = APC_PLAY;
if (request_irq(sdev->irqs[0], snd_cs4231_sbus_interrupt,
SA_SHIRQ, "cs4231", chip)) {
snd_printdd("cs4231-%d: Unable to grab SBUS IRQ %s\n",
......
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