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serial/mcf: Use the rs485 functions on serial_core 

In order to unify all the rs485 ioctl handling.
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.

Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ricardo Ribalda Delgado 2014-11-06 09:22:55 +01:00 committed by Greg Kroah-Hartman
parent b57d15fe8b
commit 2fc0184dae
1 changed files with 7 additions and 30 deletions
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37
drivers/tty/serial/mcf.c
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@ -57,7 +57,6 @@ struct mcf_uart {
struct uart_port port;
unsigned int sigs; /* Local copy of line sigs */
unsigned char imr; /* Local IMR mirror */
struct serial_rs485 rs485; /* RS485 settings */
};
/****************************************************************************/
@ -104,7 +103,7 @@ static void mcf_start_tx(struct uart_port *port)
{
struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
if (pp->rs485.flags & SER_RS485_ENABLED) {
if (port->rs485.flags & SER_RS485_ENABLED) {
/* Enable Transmitter */
writeb(MCFUART_UCR_TXENABLE, port->membase + MCFUART_UCR);
/* Manually assert RTS */
@ -258,7 +257,7 @@ static void mcf_set_termios(struct uart_port *port, struct ktermios *termios,
mr2 |= MCFUART_MR2_TXCTS;
}
if (pp->rs485.flags & SER_RS485_ENABLED) {
if (port->rs485.flags & SER_RS485_ENABLED) {
dev_dbg(port->dev, "Setting UART to RS485\n");
mr2 |= MCFUART_MR2_TXRTS;
}
@ -360,7 +359,7 @@ static void mcf_tx_chars(struct mcf_uart *pp)
pp->imr &= ~MCFUART_UIR_TXREADY;
writeb(pp->imr, port->membase + MCFUART_UIMR);
/* Disable TX to negate RTS automatically */
if (pp->rs485.flags & SER_RS485_ENABLED)
if (port->rs485.flags & SER_RS485_ENABLED)
writeb(MCFUART_UCR_TXDISABLE,
port->membase + MCFUART_UCR);
}
@ -440,7 +439,7 @@ static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser)
/****************************************************************************/
/* Enable or disable the RS485 support */
static void mcf_config_rs485(struct uart_port *port, struct serial_rs485 *rs485)
static int mcf_config_rs485(struct uart_port *port, struct serial_rs485 *rs485)
{
struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
unsigned long flags;
@ -460,32 +459,9 @@ static void mcf_config_rs485(struct uart_port *port, struct serial_rs485 *rs485)
}
writeb(mr1, port->membase + MCFUART_UMR);
writeb(mr2, port->membase + MCFUART_UMR);
pp->rs485 = *rs485;
port->rs485 = *rs485;
spin_unlock_irqrestore(&port->lock, flags);
}
static int mcf_ioctl(struct uart_port *port, unsigned int cmd,
unsigned long arg)
{
switch (cmd) {
case TIOCSRS485: {
struct serial_rs485 rs485;
if (copy_from_user(&rs485, (struct serial_rs485 *)arg,
sizeof(struct serial_rs485)))
return -EFAULT;
mcf_config_rs485(port, &rs485);
break;
}
case TIOCGRS485: {
struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
if (copy_to_user((struct serial_rs485 *)arg, &pp->rs485,
sizeof(struct serial_rs485)))
return -EFAULT;
break;
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
@ -510,7 +486,6 @@ static const struct uart_ops mcf_uart_ops = {
.release_port = mcf_release_port,
.config_port = mcf_config_port,
.verify_port = mcf_verify_port,
.ioctl = mcf_ioctl,
};
static struct mcf_uart mcf_ports[4];
@ -538,6 +513,7 @@ int __init early_mcf_setup(struct mcf_platform_uart *platp)
port->irq = platp[i].irq;
port->uartclk = MCF_BUSCLK;
port->flags = UPF_BOOT_AUTOCONF;
port->rs485_config = mcf_config_rs485;
port->ops = &mcf_uart_ops;
}
@ -663,6 +639,7 @@ static int mcf_probe(struct platform_device *pdev)
port->uartclk = MCF_BUSCLK;
port->ops = &mcf_uart_ops;
port->flags = UPF_BOOT_AUTOCONF;
port->rs485_config = mcf_config_rs485;
uart_add_one_port(&mcf_driver, port);
}