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authorGeorg Chini <georg.chini@triaton-webhosting.com>2005-11-07 14:08:25 -0800
committerDavid S. Miller <davem@davemloft.net>2005-11-07 14:08:25 -0800
commit5a820fa7e1a34f12fec4e6766e5c335ae9427028 (patch)
treef2cf3a0747fd71cc817a6bfe565d73b60370a6b2 /sound
parentee1858d3122dedd2e82a61b6ab56b229aefd9447 (diff)
[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: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound')
-rw-r--r--sound/sparc/cs4231.c311
1 files changed, 199 insertions, 112 deletions
diff --git a/sound/sparc/cs4231.c b/sound/sparc/cs4231.c
index f4361c518e4..110d64d4848 100644
--- a/sound/sparc/cs4231.c
+++ b/sound/sparc/cs4231.c
@@ -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 */
@@ -472,6 +494,103 @@ static unsigned char snd_cs4231_in(cs4231_t *chip, unsigned char reg)
}
/*
+ * 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",