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SAMA5D Serial: Backup support for flowcontrol and termios from SAM3/4 -- UNVERIFIED

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This commit is contained in:
Gregory Nutt 2015-04-08 14:13:08 -06:00
parent ae15c6963c
commit d88c9b05f2
1 changed files with 203 additions and 5 deletions
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208
arch/arm/src/sama5/sam_serial.c
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@ -48,6 +48,10 @@
#include <errno.h>
#include <debug.h>
#ifdef CONFIG_SERIAL_TERMIOS
# include <termios.h>
#endif
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <nuttx/serial/serial.h>
@ -399,6 +403,9 @@ struct up_dev_s
uint8_t parity; /* 0=none, 1=odd, 2=even */
uint8_t bits; /* Number of bits (7 or 8) */
bool stopbits2; /* true: Configure with 2 stop bits instead of 1 */
#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
bool flowc; /* input flow control (RTS) enabled */
#endif
};
/****************************************************************************
@ -514,7 +521,7 @@ static struct up_dev_s g_uart1priv =
.parity = CONFIG_UART1_PARITY,
.bits = CONFIG_UART1_BITS,
.stopbits2 = CONFIG_UART1_2STOP,
};
;
static uart_dev_t g_uart1port =
{
@ -544,6 +551,9 @@ static struct up_dev_s g_usart0priv =
.parity = CONFIG_USART0_PARITY,
.bits = CONFIG_USART0_BITS,
.stopbits2 = CONFIG_USART0_2STOP,
#if defined(CONFIG_USART0_OFLOWCONTROL) || defined(CONFIG_USART0_IFLOWCONTROL)
.flowc = true,
#endif
};
static uart_dev_t g_usart0port =
@ -574,6 +584,9 @@ static struct up_dev_s g_usart1priv =
.parity = CONFIG_USART1_PARITY,
.bits = CONFIG_USART1_BITS,
.stopbits2 = CONFIG_USART1_2STOP,
#if defined(CONFIG_USART1_OFLOWCONTROL) || defined(CONFIG_USART1_IFLOWCONTROL)
.flowc = true,
#endif
};
static uart_dev_t g_usart1port =
@ -604,6 +617,9 @@ static struct up_dev_s g_usart2priv =
.parity = CONFIG_USART2_PARITY,
.bits = CONFIG_USART2_BITS,
.stopbits2 = CONFIG_USART2_2STOP,
#if defined(CONFIG_USART2_OFLOWCONTROL) || defined(CONFIG_USART2_IFLOWCONTROL)
.flowc = true,
#endif
};
static uart_dev_t g_usart2port =
@ -634,6 +650,9 @@ static struct up_dev_s g_usart3priv =
.parity = CONFIG_USART3_PARITY,
.bits = CONFIG_USART3_BITS,
.stopbits2 = CONFIG_USART3_2STOP,
#if defined(CONFIG_USART3_OFLOWCONTROL) || defined(CONFIG_USART3_IFLOWCONTROL)
.flowc = true,
#endif
};
static uart_dev_t g_usart3port =
@ -664,6 +683,9 @@ static struct up_dev_s g_usart4priv =
.parity = CONFIG_USART4_PARITY,
.bits = CONFIG_USART4_BITS,
.stopbits2 = CONFIG_USART4_2STOP,
#if defined(CONFIG_USART4_OFLOWCONTROL) || defined(CONFIG_USART4_IFLOWCONTROL)
.flowc = true,
#endif
};
static uart_dev_t g_usart4port =
@ -746,11 +768,28 @@ static int up_setup(struct uart_dev_s *dev)
up_shutdown(dev);
/* Set up the mode register. Start with normal UART mode and the MCK
* as the timing source
#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
/* "Setting the USART to operate with hardware handshaking is performed by
* writing the USART_MODE field in the Mode Register (US_MR) to the value
* 0x2. ... Using this mode requires using the PDC or DMAC channel for
* reception. The transmitter can handle hardware handshaking in any case."
*/
regval = (UART_MR_MODE_NORMAL | SAM_MR_USCLKS);
if (priv->flowc)
{
/* Enable hardware flow control and MCK as the timing source */
regval = (UART_MR_MODE_HWHS | SAM_MR_USCLKS);
}
else
#endif
{
/* Set up the mode register. Start with normal UART mode and the MCK
* as the timing source
*/
regval = (UART_MR_MODE_NORMAL | SAM_MR_USCLKS);
}
/* OR in settings for the selected number of bits */
@ -1032,7 +1071,7 @@ static int up_interrupt(int irq, void *context)
static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
{
#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
#if defined(CONFIG_SERIAL_TERMIOS) || defined(CONFIG_SERIAL_TIOCSERGSTRUCT)
struct inode *inode = filep->f_inode;
struct uart_dev_s *dev = inode->i_private;
#endif
@ -1056,6 +1095,165 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
break;
#endif
#ifdef CONFIG_SERIAL_TERMIOS
case TCGETS:
{
struct termios *termiosp = (struct termios*)arg;
struct up_dev_s *priv = (struct up_dev_s *)dev->priv;
if (!termiosp)
{
ret = -EINVAL;
break;
}
/* Return baud */
cfsetispeed(termiosp, priv->baud);
/* Return parity */
termiosp->c_cflag = ((priv->parity != 0) ? PARENB : 0) |
((priv->parity == 1) ? PARODD : 0);
/* Return stop bits */
termiosp->c_cflag |= (priv->stopbits2) ? CSTOPB : 0;
/* Return flow control */
#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
termiosp->c_cflag |= (priv->flowc) ? (CCTS_OFLOW | CRTS_IFLOW): 0;
#endif
/* Return number of bits */
switch (priv->bits)
{
case 5:
termiosp->c_cflag |= CS5;
break;
case 6:
termiosp->c_cflag |= CS6;
break;
case 7:
termiosp->c_cflag |= CS7;
break;
default:
case 8:
termiosp->c_cflag |= CS8;
break;
case 9:
termiosp->c_cflag |= CS8 /* CS9 */;
break;
}
}
break;
case TCSETS:
{
struct termios *termiosp = (struct termios*)arg;
struct up_dev_s *priv = (struct up_dev_s *)dev->priv;
uint32_t baud;
uint32_t imr;
uint8_t parity;
uint8_t nbits;
bool stop2;
#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
bool flowc;
#endif
if (!termiosp)
{
ret = -EINVAL;
break;
}
/* Decode baud. */
ret = OK;
baud = cfgetispeed(termiosp);
/* Decode number of bits */
switch (termiosp->c_cflag & CSIZE)
{
case CS5:
nbits = 5;
break;
case CS6:
nbits = 6;
break;
case CS7:
nbits = 7;
break;
case CS8:
nbits = 8;
break;
#if 0
case CS9:
nbits = 9;
break;
#endif
default:
ret = -EINVAL;
break;
}
/* Decode parity */
if ((termiosp->c_cflag & PARENB) != 0)
{
parity = (termiosp->c_cflag & PARODD) ? 1 : 2;
}
else
{
parity = 0;
}
/* Decode stop bits */
stop2 = (termiosp->c_cflag & CSTOPB) != 0;
/* Decode flow control */
#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
flowc = (termiosp->c_cflag & (CCTS_OFLOW | CRTS_IFLOW)) != 0;
#endif
/* Verify that all settings are valid before committing */
if (ret == OK)
{
/* Commit */
priv->baud = baud;
priv->parity = parity;
priv->bits = nbits;
priv->stopbits2 = stop2;
#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
priv->flowc = flowc;
#endif
/* effect the changes immediately - note that we do not
* implement TCSADRAIN / TCSAFLUSH
*/
up_disableallints(priv, &imr);
ret = up_setup(dev);
/* Restore the interrupt state */
up_restoreusartint(priv, imr);
}
}
break;
#endif /* CONFIG_SERIAL_TERMIOS */
default:
ret = -ENOTTY;
break;