arch/arm/src/imxrt/imxrt_serial.c: Support independent input and output flow control.
This commit is contained in:
David Sidrane
Gregory Nutt
parent
c44c30784c
commit
c38a5af732
@ -66,6 +66,8 @@
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#include "up_internal.h"
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#include "chip/imxrt_lpuart.h"
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#include "imxrt_gpio.h"
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#include "chip/imxrt_pinmux.h"
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#include "imxrt_config.h"
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#include "imxrt_lowputc.h"
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@ -313,6 +315,18 @@
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# define PM_IDLE_DOMAIN 0 /* Revisit */
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#endif
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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# define IFLOW 1
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#else
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# define IFLOW 0
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#endif
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#ifdef CONFIG_SERIAL_OFLOWCONTROL
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# define OFLOW 1
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#else
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# define OFLOW 0
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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@ -325,9 +339,21 @@ struct imxrt_uart_s
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uint8_t irq; /* IRQ associated with this UART */
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uint8_t parity; /* 0=none, 1=odd, 2=even */
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uint8_t bits; /* Number of bits (7 or 8) */
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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const uint32_t rts_gpio; /* U[S]ART RTS GPIO pin configuration */
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#endif
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#ifdef CONFIG_SERIAL_OFLOWCONTROL
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const uint32_t cts_gpio; /* U[S]ART CTS GPIO pin configuration */
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#endif
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uint8_t stopbits2:1; /* 1: Configure with 2 stop bits vs 1 */
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uint8_t hwfc:1; /* 1: Hardware flow control */
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uint8_t reserved:6;
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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uint8_t iflow:1; /* input flow control (RTS) enabled */
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#endif
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#ifdef CONFIG_SERIAL_OFLOWCONTROL
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uint8_t oflow:1; /* output flow control (CTS) enabled */
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#endif
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uint8_t reserved:(7 - IFLOW + OFLOW);
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};
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/****************************************************************************
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@ -442,6 +468,14 @@ static struct imxrt_uart_s g_uart1priv =
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.parity = CONFIG_LPUART1_PARITY,
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.bits = CONFIG_LPUART1_BITS,
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.stopbits2 = CONFIG_LPUART1_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART1_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART1_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART1_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART1_RTS,
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#endif
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};
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static struct uart_dev_s g_uart1port =
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@ -472,6 +506,14 @@ static struct imxrt_uart_s g_uart2priv =
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.parity = CONFIG_LPUART2_PARITY,
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.bits = CONFIG_LPUART2_BITS,
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.stopbits2 = CONFIG_LPUART2_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART2_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART2_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART2_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART2_RTS,
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#endif
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};
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static struct uart_dev_s g_uart2port =
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@ -500,6 +542,14 @@ static struct imxrt_uart_s g_uart3priv =
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.parity = CONFIG_LPUART3_PARITY,
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.bits = CONFIG_LPUART3_BITS,
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.stopbits2 = CONFIG_LPUART3_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART3_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART3_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART3_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART3_RTS,
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#endif
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};
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static struct uart_dev_s g_uart3port =
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@ -528,6 +578,14 @@ static struct imxrt_uart_s g_uart4priv =
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.parity = CONFIG_LPUART4_PARITY,
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.bits = CONFIG_LPUART4_BITS,
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.stopbits2 = CONFIG_LPUART4_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART4_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART4_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART4_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART4_RTS,
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#endif
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};
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static struct uart_dev_s g_uart4port =
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@ -556,6 +614,14 @@ static struct imxrt_uart_s g_uart5priv =
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.parity = CONFIG_LPUART5_PARITY,
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.bits = CONFIG_LPUART5_BITS,
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.stopbits2 = CONFIG_LPUART5_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART5_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART5_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART5_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART5_RTS,
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#endif
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};
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static struct uart_dev_s g_uart5port =
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@ -584,6 +650,14 @@ static struct imxrt_uart_s g_uart6priv =
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.parity = CONFIG_LPUART6_PARITY,
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.bits = CONFIG_LPUART6_BITS,
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.stopbits2 = CONFIG_LPUART6_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART6_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART6_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART6_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART6_RTS,
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#endif
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};
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static struct uart_dev_s g_uart6port =
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@ -612,6 +686,14 @@ static struct imxrt_uart_s g_uart7priv =
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.parity = CONFIG_LPUART7_PARITY,
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.bits = CONFIG_LPUART7_BITS,
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.stopbits2 = CONFIG_LPUART7_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART7_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART7_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART7_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART7_RTS,
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#endif
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};
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static struct uart_dev_s g_uart7port =
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@ -640,6 +722,14 @@ static struct imxrt_uart_s g_uart8priv =
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.parity = CONFIG_LPUART8_PARITY,
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.bits = CONFIG_LPUART8_BITS,
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.stopbits2 = CONFIG_LPUART8_2STOP,
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#if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART8_OFLOWCONTROL)
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.oflow = 1,
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.cts_gpio = GPIO_LPUART8_CTS,
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#endif
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) && defined(CONFIG_LPUART8_IFLOWCONTROL)
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.iflow = 1,
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.rts_gpio = GPIO_LPUART8_RTS,
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#endif
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};
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static struct uart_dev_s g_uart8port =
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@ -933,7 +1023,7 @@ static int imxrt_interrupt(int irq, void *context, FAR void *arg)
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static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
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{
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#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
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#if defined(CONFIG_SERIAL_TIOCSERGSTRUCT) || defined(CONFIG_SERIAL_TERMIOS)
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struct inode *inode = filep->f_inode;
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struct uart_dev_s *dev = inode->i_private;
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#endif
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@ -982,10 +1072,13 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
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termiosp->c_cflag |= (priv->stopbits2) ? CSTOPB : 0;
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
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/* Return flow control */
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termiosp->c_cflag |= (priv->flowc) ? (CCTS_OFLOW | CRTS_IFLOW): 0;
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#ifdef CONFIG_SERIAL_OFLOWCONTROL
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termiosp->c_cflag |= ((priv->oflow) ? CCTS_OFLOW : 0);
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#endif
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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termiosp->c_cflag |= ((priv->iflow) ? CRTS_IFLOW : 0);
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#endif
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/* Return number of bits */
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@ -1024,11 +1117,15 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
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uint8_t parity;
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uint8_t nbits;
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bool stop2;
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
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bool flowc;
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#endif
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if (!termiosp)
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if ((!termiosp)
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#ifdef CONFIG_SERIAL_OFLOWCONTROL
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|| ((termiosp->c_cflag & CCTS_OFLOW) && (priv->cts_gpio == 0))
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#endif
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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|| ((termiosp->c_cflag & CRTS_IFLOW) && (priv->rts_gpio == 0))
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#endif
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)
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{
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ret = -EINVAL;
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break;
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@ -1083,11 +1180,6 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
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stop2 = (termiosp->c_cflag & CSTOPB) != 0;
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
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/* Decode flow control */
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flowc = (termiosp->c_cflag & (CCTS_OFLOW | CRTS_IFLOW)) != 0;
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#endif
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/* Verify that all settings are valid before committing */
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if (ret == OK)
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@ -1098,8 +1190,11 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
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priv->parity = parity;
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priv->bits = nbits;
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priv->stopbits2 = stop2;
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#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
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priv->flowc = flowc;
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#ifdef CONFIG_SERIAL_OFLOWCONTROL
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priv->oflow = (termiosp->c_cflag & CCTS_OFLOW) != 0;
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#endif
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#ifdef CONFIG_SERIAL_IFLOWCONTROL
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priv->iflow = (termiosp->c_cflag & CRTS_IFLOW) != 0;
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#endif
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/* effect the changes immediately - note that we do not
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* implement TCSADRAIN / TCSAFLUSH
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