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serial: sh-sci: Tidy up fifo overrun error handling. 

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-12-16 19:29:38 +09:00
parent 762c69e3ca
commit d830fa4584
2 changed files with 29 additions and 27 deletions
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45
drivers/serial/sh-sci.c
View File

@ -625,6 +625,27 @@ static inline int sci_handle_errors(struct uart_port *port)
return copied;
}
static inline int sci_handle_fifo_overrun(struct uart_port *port)
{
struct tty_struct *tty = port->info->port.tty;
int copied = 0;
if (port->type != PORT_SCIF)
return 0;
if ((sci_in(port, SCLSR) & SCIF_ORER) != 0) {
sci_out(port, SCLSR, 0);
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
tty_flip_buffer_push(tty);
dev_notice(port->dev, "overrun error\n");
copied++;
}
return copied;
}
static inline int sci_handle_breaks(struct uart_port *port)
{
int copied = 0;
@ -647,20 +668,11 @@ static inline int sci_handle_breaks(struct uart_port *port)
dev_dbg(port->dev, "BREAK detected\n");
}
#if defined(SCIF_ORER)
/* XXX: Handle SCIF overrun error */
if (port->type != PORT_SCI && (sci_in(port, SCLSR) & SCIF_ORER) != 0) {
sci_out(port, SCLSR, 0);
if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) {
copied++;
dev_notice(port->dev, "overrun error\n");
}
}
#endif
if (copied)
tty_flip_buffer_push(tty);
copied += sci_handle_fifo_overrun(port);
return copied;
}
@ -698,16 +710,7 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr)
sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
}
} else {
#if defined(SCIF_ORER)
if ((sci_in(port, SCLSR) & SCIF_ORER) != 0) {
struct tty_struct *tty = port->info->port.tty;
sci_out(port, SCLSR, 0);
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
tty_flip_buffer_push(tty);
dev_notice(port->dev, "overrun error\n");
}
#endif
sci_handle_fifo_overrun(port);
sci_rx_interrupt(irq, ptr);
}

11
drivers/serial/sh-sci.h
View File

@ -232,6 +232,10 @@
# define SCIF_TXROOM_MAX 16
#endif
#ifndef SCIF_ORER
#define SCIF_ORER 0x0000
#endif
#define SCxSR_TEND(port) (((port)->type == PORT_SCI) ? SCI_TEND : SCIF_TEND)
#define SCxSR_ERRORS(port) (((port)->type == PORT_SCI) ? SCI_ERRORS : SCIF_ERRORS)
#define SCxSR_RDxF(port) (((port)->type == PORT_SCI) ? SCI_RDRF : SCIF_RDF)
@ -239,12 +243,7 @@
#define SCxSR_FER(port) (((port)->type == PORT_SCI) ? SCI_FER : SCIF_FER)
#define SCxSR_PER(port) (((port)->type == PORT_SCI) ? SCI_PER : SCIF_PER)
#define SCxSR_BRK(port) (((port)->type == PORT_SCI) ? 0x00 : SCIF_BRK)
#if defined(CONFIG_CPU_SUBTYPE_SH7705)
# define SCxSR_ORER(port) (((port)->type == PORT_SCI) ? SCI_ORER : SCIF_ORER)
#else
# define SCxSR_ORER(port) (((port)->type == PORT_SCI) ? SCI_ORER : 0x0000)
#endif
#define SCxSR_ORER(port) (((port)->type == PORT_SCI) ? SCI_ORER : SCIF_ORER)
#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
defined(CONFIG_CPU_SUBTYPE_SH7720) || \