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drivers/serial/uart_16550.c: Add stub implementations of DMA-related methods in the 16550 UART v-table.

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This commit is contained in:
ligd 2018-08-26 11:20:15 -06:00 committed by Gregory Nutt
parent 46e47c8dcf
commit 1cbaae77cc
1 changed files with 38 additions and 0 deletions
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38
drivers/serial/uart_16550.c
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@ -96,6 +96,12 @@ static int u16550_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
static int u16550_receive(FAR struct uart_dev_s *dev, uint32_t *status);
static void u16550_rxint(FAR struct uart_dev_s *dev, bool enable);
static bool u16550_rxavailable(FAR struct uart_dev_s *dev);
#ifdef CONFIG_SERIAL_DMA
static void u16550_dmasend(FAR struct uart_dev_s *dev);
static void u16550_dmareceive(FAR struct uart_dev_s *dev);
static void u16550_dmarxfree(FAR struct uart_dev_s *dev);
static void u16550_dmatxavail(FAR struct uart_dev_s *dev);
#endif
static void u16550_send(FAR struct uart_dev_s *dev, int ch);
static void u16550_txint(FAR struct uart_dev_s *dev, bool enable);
static bool u16550_txready(FAR struct uart_dev_s *dev);
@ -117,6 +123,12 @@ static const struct uart_ops_s g_uart_ops =
.rxavailable = u16550_rxavailable,
#ifdef CONFIG_SERIAL_IFLOWCONTROL
.rxflowcontrol = NULL,
#endif
#ifdef CONFIG_SERIAL_DMA
.dmasend = u16550_dmasend,
.dmareceive = u16550_dmareceive,
.dmarxfree = u16550_dmarxfree,
.dmatxavail = u16550_dmatxavail,
#endif
.send = u16550_send,
.txint = u16550_txint,
@ -970,6 +982,32 @@ static bool u16550_rxavailable(struct uart_dev_s *dev)
return ((u16550_serialin(priv, UART_LSR_OFFSET) & UART_LSR_DR) != 0);
}
/****************************************************************************
* Name: u16550_dma*
*
* Description:
* Stubbed out DMA-related methods
*
****************************************************************************/
#ifdef CONFIG_SERIAL_DMA
static void u16550_dmasend(FAR struct uart_dev_s *dev)
{
}
static void u16550_dmareceive(FAR struct uart_dev_s *dev)
{
}
static void u16550_dmarxfree(FAR struct uart_dev_s *dev)
{
}
static void u16550_dmatxavail(FAR struct uart_dev_s *dev)
{
}
#endif
/****************************************************************************
* Name: u16550_send
*