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arch/arm/imxrt: Serial add RXDMA support for singlewire mode

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In singlewire mode the ops were only for non-dma usecases. But if rxdma is enabled we can use that.
For TXDMA it's not possible because we've to change pin direction immediately after transmission is done.
This commit is contained in:
Peter van der Perk 2025-06-03 17:16:15 +02:00 • committed by Alin Jerpelea
parent dd07367f4e
commit e9b7dee55a
1 changed files with 46 additions and 2 deletions
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48
arch/arm/src/imxrt/imxrt_serial.c
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@ -884,6 +884,28 @@ static const struct uart_ops_s g_lpuart_singlewire_ops =
.txready = imxrt_txready,
.txempty = imxrt_txempty,
};
#ifdef SERIAL_HAVE_RXDMA
static const struct uart_ops_s g_lpuart_singlewire_rxdma_ops =
{
.setup = imxrt_dma_setup,
.shutdown = imxrt_dma_shutdown,
.attach = imxrt_attach,
.detach = imxrt_detach,
.ioctl = imxrt_ioctl,
.receive = imxrt_dma_receive,
.rxint = imxrt_dma_rxint,
.rxavailable = imxrt_dma_rxavailable,
#ifdef CONFIG_SERIAL_IFLOWCONTROL
.rxflowcontrol = imxrt_rxflowcontrol,
#endif
.send = imxrt_singlewire_send,
.txint = imxrt_singlewire_txint,
.txready = imxrt_txready,
.txempty = imxrt_txempty,
};
#endif
#endif
#if !defined(SERIAL_HAVE_ONLY_TXDMA) && !defined(SERIAL_HAVE_ONLY_RXDMA)
@ -1166,6 +1188,7 @@ static struct imxrt_uart_s g_lpuart1priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART1_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
@ -1236,6 +1259,7 @@ static struct imxrt_uart_s g_lpuart2priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART2_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART2_INVERTIFLOWCONTROL))
@ -1303,6 +1327,7 @@ static struct imxrt_uart_s g_lpuart3priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART3_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART3_INVERTIFLOWCONTROL))
@ -1370,6 +1395,7 @@ static struct imxrt_uart_s g_lpuart4priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART4_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART4_INVERTIFLOWCONTROL))
@ -1437,6 +1463,7 @@ static struct imxrt_uart_s g_lpuart5priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART5_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART5_INVERTIFLOWCONTROL))
@ -1504,6 +1531,7 @@ static struct imxrt_uart_s g_lpuart6priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART6_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART6_INVERTIFLOWCONTROL))
@ -1571,6 +1599,7 @@ static struct imxrt_uart_s g_lpuart7priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART7_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART7_INVERTIFLOWCONTROL))
@ -1638,6 +1667,7 @@ static struct imxrt_uart_s g_lpuart8priv =
# endif
# ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART8_TX,
.prev_ops = 0,
# endif
# if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART8_INVERTIFLOWCONTROL))
@ -1705,6 +1735,7 @@ static struct imxrt_uart_s g_lpuart9priv =
#endif
#ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART9_TX,
.prev_ops = 0,
#endif
#if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART9_INVERTIFLOWCONTROL))
@ -1772,6 +1803,7 @@ static struct imxrt_uart_s g_lpuart10priv =
#endif
#ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART10_TX,
.prev_ops = 0,
#endif
#if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART10_INVERTIFLOWCONTROL))
@ -1839,6 +1871,7 @@ static struct imxrt_uart_s g_lpuart11priv =
#endif
#ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART11_TX,
.prev_ops = 0,
#endif
#if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART11_INVERTIFLOWCONTROL))
@ -1906,6 +1939,7 @@ static struct imxrt_uart_s g_lpuart12priv =
#endif
#ifdef CONFIG_IMXRT_LPUART_SINGLEWIRE
.tx_gpio = GPIO_LPUART12_TX,
.prev_ops = 0,
#endif
#if (((defined(CONFIG_SERIAL_RS485CONTROL) || defined(CONFIG_SERIAL_IFLOWCONTROL))) \
&& defined(CONFIG_LPUART12_INVERTIFLOWCONTROL))
@ -2687,7 +2721,16 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
~(IOMUX_PULL_MASK | IOMUX_OPENDRAIN)) | gpio_val);
regval |= LPUART_CTRL_LOOPS | LPUART_CTRL_RSRC;
priv->prev_ops = priv->dev.ops;
priv->dev.ops = &g_lpuart_singlewire_ops;
#ifdef SERIAL_HAVE_RXDMA
if (priv->dev.ops->receive == imxrt_dma_receive)
{
priv->dev.ops = &g_lpuart_singlewire_rxdma_ops;
}
else
#endif
{
priv->dev.ops = &g_lpuart_singlewire_ops;
}
}
else
{
@ -2695,9 +2738,10 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
IOMUX_OPENDRAIN)) |
IOMUX_PULL_NONE);
regval &= ~(LPUART_CTRL_LOOPS | LPUART_CTRL_RSRC);
if (priv->dev.ops == &g_lpuart_singlewire_ops)
if (priv->prev_ops)
{
priv->dev.ops = priv->prev_ops;
priv->prev_ops = 0;
}
}