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Add an I2S character driver. This driver is only intended to support I2S testing and is inappropriate for use with real I2S devices

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This commit is contained in:
Gregory Nutt 2013-11-10 10:24:09 -06:00
parent fe800abc58
commit ce58c79a1b
1 changed files with 55 additions and 51 deletions
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106
arch/arm/src/sama5/sam_ssc.c
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@ -242,7 +242,7 @@
struct sam_buffer_s
{
struct sam_buffer_s *flink; /* Supports a singly linked list */
i2s_callback_t callback; /* Function to call when the transfer completes */
void *callback; /* Function to call when the transfer completes */
uint32_t timeout; /* The timeout value to use with DMA transfers */
void *arg; /* The argument to be returned with the callback */
void *buffer; /* I/O buffer */
@ -339,10 +339,10 @@ static void ssc_dumpregs(struct sam_ssc_s *priv, const char *msg);
/* Semaphore helpers */
static void ssc_exclsem_take(FAR struct sam_ssc_s *priv);
static void ssc_exclsem_take(struct sam_ssc_s *priv);
#define ssc_exclsem_give(priv) sem_post(&priv->exclsem)
static void ssc_bufsem_take(FAR struct sam_ssc_s *priv);
static void ssc_bufsem_take(struct sam_ssc_s *priv);
#define ssc_bufsem_give(priv) sem_post(&priv->bufsem)
/* Buffer container helpers */
@ -381,30 +381,30 @@ static void ssc_txdma_sampledone(struct sam_ssc_s *priv, int result);
#ifdef SSC_HAVE_RX
static void ssc_rxdma_timeout(int argc, uint32_t arg);
static int ssc_rxdma_setup(FAR struct sam_ssc_s *priv);
static void ssc_rx_worker(FAR void *arg);
static void ssc_rx_schedule(FAR struct sam_ssc_s *priv, int result);
static int ssc_rxdma_setup(struct sam_ssc_s *priv);
static void ssc_rx_worker(void *arg);
static void ssc_rx_schedule(struct sam_ssc_s *priv, int result);
static void ssc_rxdma_callback(DMA_HANDLE handle, void *arg, int result);
#endif
#ifdef SSC_HAVE_TX
static void ssc_txdma_timeout(int argc, uint32_t arg);
static int ssc_txdma_setup(FAR struct sam_ssc_s *priv);
static void ssc_tx_worker(FAR void *arg);
static void ssc_tx_schedule(FAR struct sam_ssc_s *priv, int result);
static int ssc_txdma_setup(struct sam_ssc_s *priv);
static void ssc_tx_worker(void *arg);
static void ssc_tx_schedule(struct sam_ssc_s *priv, int result);
static void ssc_txdma_callback(DMA_HANDLE handle, void *arg, int result);
#endif
/* I2S methods */
static uint32_t ssc_rxsamplerate(FAR struct i2s_dev_s *dev, uint32_t rate);
static uint32_t ssc_rxdatawidth(FAR struct i2s_dev_s *dev, int bits);
static int ssc_receive(FAR struct i2s_dev_s *dev, FAR void *buffer,
size_t nbytes, i2s_callback_t callback, FAR void *arg,
static uint32_t ssc_rxsamplerate(struct i2s_dev_s *dev, uint32_t rate);
static uint32_t ssc_rxdatawidth(struct i2s_dev_s *dev, int bits);
static int ssc_receive(struct i2s_dev_s *dev, void *buffer,
size_t nbytes, i2s_rxcallback_t callback, void *arg,
uint32_t timeout);
static uint32_t ssc_txsamplerate(FAR struct i2s_dev_s *dev, uint32_t rate);
static uint32_t ssc_txdatawidth(FAR struct i2s_dev_s *dev, int bits);
static int ssc_send(FAR struct i2s_dev_s *dev, FAR const void *buffer,
size_t nbytes, i2s_callback_t callback, FAR void *arg,
static uint32_t ssc_txsamplerate(struct i2s_dev_s *dev, uint32_t rate);
static uint32_t ssc_txdatawidth(struct i2s_dev_s *dev, int bits);
static int ssc_send(struct i2s_dev_s *dev, const void *buffer,
size_t nbytes, i2s_txcallback_t callback, void *arg,
uint32_t timeout);
/* Initialization */
@ -619,7 +619,7 @@ static void ssc_dumpregs(struct sam_ssc_s *priv, const char *msg)
*
****************************************************************************/
static void ssc_exclsem_take(FAR struct sam_ssc_s *priv)
static void ssc_exclsem_take(struct sam_ssc_s *priv)
{
int ret;
@ -650,7 +650,7 @@ static void ssc_exclsem_take(FAR struct sam_ssc_s *priv)
*
****************************************************************************/
static void ssc_bufsem_take(FAR struct sam_ssc_s *priv)
static void ssc_bufsem_take(struct sam_ssc_s *priv)
{
int ret;
@ -1135,10 +1135,11 @@ static int ssc_rxdma_setup(struct sam_ssc_s *priv)
****************************************************************************/
#ifdef SSC_HAVE_RX
static void ssc_rx_worker(FAR void *arg)
static void ssc_rx_worker(void *arg)
{
struct sam_ssc_s *priv = (struct sam_ssc_s *)arg;
struct sam_buffer_s *bfcontainer;
i2s_rxcallback_t callback;
irqstate_t flags;
DEBUGASSERT(priv);
@ -1201,9 +1202,10 @@ static void ssc_rx_worker(FAR void *arg)
/* Perform the TX transfer done callback */
DEBUGASSERT(bfcontainer && bfcontainer->callback);
bfcontainer->callback(&priv->dev, bfcontainer->buffer,
bfcontainer->nbytes, bfcontainer->arg,
bfcontainer->result);
callback = (i2s_rxcallback_t)bfcontainer->callback;
callback(&priv->dev, bfcontainer->buffer, bfcontainer->nbytes,
bfcontainer->arg, bfcontainer->result);
/* And release the buffer container */
@ -1502,10 +1504,11 @@ static int ssc_txdma_setup(struct sam_ssc_s *priv)
****************************************************************************/
#ifdef SSC_HAVE_TX
static void ssc_tx_worker(FAR void *arg)
static void ssc_tx_worker(void *arg)
{
struct sam_ssc_s *priv = (struct sam_ssc_s *)arg;
struct sam_buffer_s *bfcontainer;
i2s_txcallback_t callback;
irqstate_t flags;
DEBUGASSERT(priv);
@ -1568,9 +1571,10 @@ static void ssc_tx_worker(FAR void *arg)
/* Perform the TX transfer done callback */
DEBUGASSERT(bfcontainer && bfcontainer->callback);
bfcontainer->callback(&priv->dev, bfcontainer->buffer,
bfcontainer->nbytes, bfcontainer->arg,
bfcontainer->result);
callback = (i2s_txcallback_t)bfcontainer->callback;
callback(&priv->dev, bfcontainer->buffer, bfcontainer->nbytes,
bfcontainer->arg, bfcontainer->result);
/* And release the buffer container */
@ -1705,7 +1709,7 @@ static void ssc_txdma_callback(DMA_HANDLE handle, void *arg, int result)
*
****************************************************************************/
static uint32_t ssc_rxsamplerate(FAR struct i2s_dev_s *dev, uint32_t rate)
static uint32_t ssc_rxsamplerate(struct i2s_dev_s *dev, uint32_t rate)
{
#if defined(SSC_HAVE_RX) && defined(SSC_HAVE_MCK)
struct sam_ssc_s *priv = (struct sam_ssc_s *)dev;
@ -1741,7 +1745,7 @@ static uint32_t ssc_rxsamplerate(FAR struct i2s_dev_s *dev, uint32_t rate)
*
****************************************************************************/
static uint32_t ssc_rxdatawidth(FAR struct i2s_dev_s *dev, int bits)
static uint32_t ssc_rxdatawidth(struct i2s_dev_s *dev, int bits)
{
#ifdef SSC_HAVE_RX
struct sam_ssc_s *priv = (struct sam_ssc_s *)dev;
@ -1799,9 +1803,9 @@ static uint32_t ssc_rxdatawidth(FAR struct i2s_dev_s *dev, int bits)
*
****************************************************************************/
static int ssc_receive(FAR struct i2s_dev_s *dev, FAR void *buffer,
size_t nbytes, i2s_callback_t callback,
FAR void *arg, uint32_t timeout)
static int ssc_receive(struct i2s_dev_s *dev, void *buffer,
size_t nbytes, i2s_rxcallback_t callback,
void *arg, uint32_t timeout)
{
struct sam_ssc_s *priv = (struct sam_ssc_s *)dev;
struct sam_buffer_s *bfcontainer;
@ -1809,7 +1813,7 @@ static int ssc_receive(FAR struct i2s_dev_s *dev, FAR void *buffer,
int ret;
i2svdbg("buffer=%p nbytes=%d\n", buffer, (int)nbytes);
DEBUGASSERT(priv);
DEBUGASSERT(priv && buffer && ((uintptr_t)buffer & 3) == 0);
#ifdef SSC_HAVE_RX
/* Allocate a buffer container in advance */
@ -1832,12 +1836,12 @@ static int ssc_receive(FAR struct i2s_dev_s *dev, FAR void *buffer,
/* Initialize the buffer container structure */
bfcontainer->callback = callback; /* Function to call when the transfer completes */
bfcontainer->timeout = timeout; /* The timeout value to use with DMA transfers */
bfcontainer->arg = arg; /* The argument to be returned with the callback */
bfcontainer->buffer = buffer; /* I/O buffer */
bfcontainer->nbytes = nbytes; /* Number of valid bytes in the buffer */
bfcontainer->result = -EBUSY; /* The result of the transfer */
bfcontainer->callback = (void *)callback;
bfcontainer->timeout = timeout;
bfcontainer->arg = arg;
bfcontainer->buffer = buffer;
bfcontainer->nbytes = nbytes;
bfcontainer->result = -EBUSY;
/* Add the buffer container to the end of the RX pending queue */
@ -1883,7 +1887,7 @@ errout_with_exclsem:
*
****************************************************************************/
static uint32_t ssc_txsamplerate(FAR struct i2s_dev_s *dev, uint32_t rate)
static uint32_t ssc_txsamplerate(struct i2s_dev_s *dev, uint32_t rate)
{
#if defined(SSC_HAVE_TX) && defined(SSC_HAVE_MCK)
struct sam_ssc_s *priv = (struct sam_ssc_s *)dev;
@ -1919,7 +1923,7 @@ static uint32_t ssc_txsamplerate(FAR struct i2s_dev_s *dev, uint32_t rate)
*
****************************************************************************/
static uint32_t ssc_txdatawidth(FAR struct i2s_dev_s *dev, int bits)
static uint32_t ssc_txdatawidth(struct i2s_dev_s *dev, int bits)
{
#ifdef SSC_HAVE_TX
struct sam_ssc_s *priv = (struct sam_ssc_s *)dev;
@ -1976,9 +1980,9 @@ static uint32_t ssc_txdatawidth(FAR struct i2s_dev_s *dev, int bits)
*
****************************************************************************/
static int ssc_send(FAR struct i2s_dev_s *dev, FAR const void *buffer,
size_t nbytes, i2s_callback_t callback,
FAR void *arg, uint32_t timeout)
static int ssc_send(struct i2s_dev_s *dev, const void *buffer,
size_t nbytes, i2s_txcallback_t callback,
void *arg, uint32_t timeout)
{
struct sam_ssc_s *priv = (struct sam_ssc_s *)dev;
struct sam_buffer_s *bfcontainer;
@ -1986,7 +1990,7 @@ static int ssc_send(FAR struct i2s_dev_s *dev, FAR const void *buffer,
int ret;
i2svdbg("buffer=%p nbytes=%d\n", buffer, (int)nbytes);
DEBUGASSERT(priv);
DEBUGASSERT(priv && buffer && ((uintptr_t)buffer & 3) == 0);
#ifdef SSC_HAVE_TX
/* Allocate a buffer container in advance */
@ -2009,12 +2013,12 @@ static int ssc_send(FAR struct i2s_dev_s *dev, FAR const void *buffer,
/* Initialize the buffer container structure */
bfcontainer->callback = callback; /* Function to call when the transfer completes */
bfcontainer->timeout = timeout; /* The timeout value to use with DMA transfers */
bfcontainer->arg = arg; /* The argument to be returned with the callback */
bfcontainer->buffer = (FAR void *)buffer; /* I/O buffer */
bfcontainer->nbytes = nbytes; /* Number of valid bytes in the buffer */
bfcontainer->result = -EBUSY; /* The result of the transfer */
bfcontainer->callback = (void *)callback;
bfcontainer->timeout = timeout;
bfcontainer->arg = arg;
bfcontainer->buffer = (void *)buffer;
bfcontainer->nbytes = nbytes;
bfcontainer->result = -EBUSY;
/* Add the buffer container to the end of the TX pending queue */