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[add] DMA choice of serial

This commit is contained in:
chenchaoqun@rt-thread.com 2018-12-08 11:37:13 +08:00
parent 538923d34e
commit 5098c934d3
2 changed files with 73 additions and 43 deletions
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6
components/drivers/Kconfig
View File

@ -16,6 +16,12 @@ config RT_USING_SERIAL
select RT_USING_DEVICE
default y
if RT_USING_SERIAL
config RT_SERIAL_USING_DMA
bool "Enable serial DMA mode"
default y
endif
config RT_USING_CAN
bool "Using CAN device drivers"
default n

110
components/drivers/serial/serial.c
View File

@ -21,6 +21,7 @@
* 2017-11-07 JasonJia fix data bits error issue when using tcsetattr.
* 2017-11-15 JasonJia fix poll rx issue when data is full.
* add TCFLSH and FIONREAD support.
* 2018-12-08 Ernest Chen add DMA choice
*/
#include <rthw.h>
@ -328,6 +329,7 @@ rt_inline int _serial_int_tx(struct rt_serial_device *serial, const rt_uint8_t *
return size - length;
}
#if defined(RT_USING_POSIX) || defined(RT_SERIAL_USING_DMA)
static rt_size_t _serial_fifo_calc_recved_len(struct rt_serial_device *serial)
{
struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo *) serial->serial_rx;
@ -350,7 +352,9 @@ static rt_size_t _serial_fifo_calc_recved_len(struct rt_serial_device *serial)
}
}
}
#endif /* RT_USING_POSIX || RT_SERIAL_USING_DMA */
#ifdef RT_SERIAL_USING_DMA
/**
* Calculate DMA received data length.
*
@ -527,6 +531,7 @@ rt_inline int _serial_dma_tx(struct rt_serial_device *serial, const rt_uint8_t *
return 0;
}
}
#endif /* RT_SERIAL_USING_DMA */
/* RT-Thread Device Interface */
/*
@ -561,11 +566,13 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
LOG_D("open serial device: 0x%08x with open flag: 0x%04x",
dev, oflag);
#ifdef RT_SERIAL_USING_DMA
/* check device flag with the open flag */
if ((oflag & RT_DEVICE_FLAG_DMA_RX) && !(dev->flag & RT_DEVICE_FLAG_DMA_RX))
return -RT_EIO;
if ((oflag & RT_DEVICE_FLAG_DMA_TX) && !(dev->flag & RT_DEVICE_FLAG_DMA_TX))
return -RT_EIO;
#endif /* RT_SERIAL_USING_DMA */
if ((oflag & RT_DEVICE_FLAG_INT_RX) && !(dev->flag & RT_DEVICE_FLAG_INT_RX))
return -RT_EIO;
if ((oflag & RT_DEVICE_FLAG_INT_TX) && !(dev->flag & RT_DEVICE_FLAG_INT_TX))
@ -580,8 +587,27 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
/* initialize the Rx/Tx structure according to open flag */
if (serial->serial_rx == RT_NULL)
{
if (oflag & RT_DEVICE_FLAG_DMA_RX)
{
if (oflag & RT_DEVICE_FLAG_INT_RX)
{
struct rt_serial_rx_fifo* rx_fifo;
rx_fifo = (struct rt_serial_rx_fifo*) rt_malloc (sizeof(struct rt_serial_rx_fifo) +
serial->config.bufsz);
RT_ASSERT(rx_fifo != RT_NULL);
rx_fifo->buffer = (rt_uint8_t*) (rx_fifo + 1);
rt_memset(rx_fifo->buffer, 0, serial->config.bufsz);
rx_fifo->put_index = 0;
rx_fifo->get_index = 0;
rx_fifo->is_full = RT_FALSE;
serial->serial_rx = rx_fifo;
dev->open_flag |= RT_DEVICE_FLAG_INT_RX;
/* configure low level device */
serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX);
}
#ifdef RT_SERIAL_USING_DMA
else if (oflag & RT_DEVICE_FLAG_DMA_RX)
{
if (serial->config.bufsz == 0) {
struct rt_serial_rx_dma* rx_dma;
@ -608,24 +634,7 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
}
dev->open_flag |= RT_DEVICE_FLAG_DMA_RX;
}
else if (oflag & RT_DEVICE_FLAG_INT_RX)
{
struct rt_serial_rx_fifo* rx_fifo;
rx_fifo = (struct rt_serial_rx_fifo*) rt_malloc (sizeof(struct rt_serial_rx_fifo) +
serial->config.bufsz);
RT_ASSERT(rx_fifo != RT_NULL);
rx_fifo->buffer = (rt_uint8_t*) (rx_fifo + 1);
rt_memset(rx_fifo->buffer, 0, serial->config.bufsz);
rx_fifo->put_index = 0;
rx_fifo->get_index = 0;
rx_fifo->is_full = RT_FALSE;
serial->serial_rx = rx_fifo;
dev->open_flag |= RT_DEVICE_FLAG_INT_RX;
/* configure low level device */
serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX);
}
#endif /* RT_SERIAL_USING_DMA */
else
{
serial->serial_rx = RT_NULL;
@ -633,28 +642,17 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
}
else
{
if (oflag & RT_DEVICE_FLAG_DMA_RX)
dev->open_flag |= RT_DEVICE_FLAG_DMA_RX;
else if (oflag & RT_DEVICE_FLAG_INT_RX)
if (oflag & RT_DEVICE_FLAG_INT_RX)
dev->open_flag |= RT_DEVICE_FLAG_INT_RX;
#ifdef RT_SERIAL_USING_DMA
else if (oflag & RT_DEVICE_FLAG_DMA_RX)
dev->open_flag |= RT_DEVICE_FLAG_DMA_RX;
#endif /* RT_SERIAL_USING_DMA */
}
if (serial->serial_tx == RT_NULL)
{
if (oflag & RT_DEVICE_FLAG_DMA_TX)
{
struct rt_serial_tx_dma* tx_dma;
tx_dma = (struct rt_serial_tx_dma*) rt_malloc (sizeof(struct rt_serial_tx_dma));
RT_ASSERT(tx_dma != RT_NULL);
tx_dma->activated = RT_FALSE;
rt_data_queue_init(&(tx_dma->data_queue), 8, 4, RT_NULL);
serial->serial_tx = tx_dma;
dev->open_flag |= RT_DEVICE_FLAG_DMA_TX;
}
else if (oflag & RT_DEVICE_FLAG_INT_TX)
if (oflag & RT_DEVICE_FLAG_INT_TX)
{
struct rt_serial_tx_fifo *tx_fifo;
@ -668,6 +666,21 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
/* configure low level device */
serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_TX);
}
#ifdef RT_SERIAL_USING_DMA
else if (oflag & RT_DEVICE_FLAG_DMA_TX)
{
struct rt_serial_tx_dma* tx_dma;
tx_dma = (struct rt_serial_tx_dma*) rt_malloc (sizeof(struct rt_serial_tx_dma));
RT_ASSERT(tx_dma != RT_NULL);
tx_dma->activated = RT_FALSE;
rt_data_queue_init(&(tx_dma->data_queue), 8, 4, RT_NULL);
serial->serial_tx = tx_dma;
dev->open_flag |= RT_DEVICE_FLAG_DMA_TX;
}
#endif /* RT_SERIAL_USING_DMA */
else
{
serial->serial_tx = RT_NULL;
@ -675,10 +688,12 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
}
else
{
if (oflag & RT_DEVICE_FLAG_DMA_TX)
dev->open_flag |= RT_DEVICE_FLAG_DMA_TX;
else if (oflag & RT_DEVICE_FLAG_INT_TX)
if (oflag & RT_DEVICE_FLAG_INT_TX)
dev->open_flag |= RT_DEVICE_FLAG_INT_TX;
#ifdef RT_SERIAL_USING_DMA
else if (oflag & RT_DEVICE_FLAG_DMA_TX)
dev->open_flag |= RT_DEVICE_FLAG_DMA_TX;
#endif /* RT_SERIAL_USING_DMA */
}
/* set stream flag */
@ -710,6 +725,7 @@ static rt_err_t rt_serial_close(struct rt_device *dev)
/* configure low level device */
serial->ops->control(serial, RT_DEVICE_CTRL_CLR_INT, (void*)RT_DEVICE_FLAG_INT_RX);
}
#ifdef RT_SERIAL_USING_DMA
else if (dev->open_flag & RT_DEVICE_FLAG_DMA_RX)
{
if (serial->config.bufsz == 0) {
@ -732,7 +748,8 @@ static rt_err_t rt_serial_close(struct rt_device *dev)
serial->serial_rx = RT_NULL;
dev->open_flag &= ~RT_DEVICE_FLAG_DMA_RX;
}
#endif /* RT_SERIAL_USING_DMA */
if (dev->open_flag & RT_DEVICE_FLAG_INT_TX)
{
struct rt_serial_tx_fifo* tx_fifo;
@ -746,6 +763,7 @@ static rt_err_t rt_serial_close(struct rt_device *dev)
/* configure low level device */
serial->ops->control(serial, RT_DEVICE_CTRL_CLR_INT, (void*)RT_DEVICE_FLAG_INT_TX);
}
#ifdef RT_SERIAL_USING_DMA
else if (dev->open_flag & RT_DEVICE_FLAG_DMA_TX)
{
struct rt_serial_tx_dma* tx_dma;
@ -757,7 +775,7 @@ static rt_err_t rt_serial_close(struct rt_device *dev)
serial->serial_tx = RT_NULL;
dev->open_flag &= ~RT_DEVICE_FLAG_DMA_TX;
}
#endif /* RT_SERIAL_USING_DMA */
return RT_EOK;
}
@ -777,10 +795,12 @@ static rt_size_t rt_serial_read(struct rt_device *dev,
{
return _serial_int_rx(serial, buffer, size);
}
#ifdef RT_SERIAL_USING_DMA
else if (dev->open_flag & RT_DEVICE_FLAG_DMA_RX)
{
return _serial_dma_rx(serial, buffer, size);
}
#endif /* RT_SERIAL_USING_DMA */
return _serial_poll_rx(serial, buffer, size);
}
@ -801,10 +821,12 @@ static rt_size_t rt_serial_write(struct rt_device *dev,
{
return _serial_int_tx(serial, buffer, size);
}
#ifdef RT_SERIAL_USING_DMA
else if (dev->open_flag & RT_DEVICE_FLAG_DMA_TX)
{
return _serial_dma_tx(serial, buffer, size);
}
#endif /* RT_SERIAL_USING_DMA */
else
{
return _serial_poll_tx(serial, buffer, size);
@ -1181,12 +1203,13 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
rt_completion_done(&(tx_fifo->completion));
break;
}
#ifdef RT_SERIAL_USING_DMA
case RT_SERIAL_EVENT_TX_DMADONE:
{
const void *data_ptr;
rt_size_t data_size;
const void *last_data_ptr;
struct rt_serial_tx_dma* tx_dma;
struct rt_serial_tx_dma *tx_dma;
tx_dma = (struct rt_serial_tx_dma*) serial->serial_tx;
@ -1246,6 +1269,7 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
}
break;
}
#endif /* RT_SERIAL_USING_DMA */
}
}