static inline int sci_handle_breaks(struct uart_port *port)
{
int copied = 0;
unsigned short status = sci_in(port, SCxSR);
struct tty_struct *tty = port->info->tty;
struct sci_port *s = &sci_ports[port->line];
if (!s->break_flag && status & SCxSR_BRK(port)) {
#if defined(CONFIG_CPU_SH3)
/* Debounce break */
s->break_flag = 1;
#endif
/* Notify of BREAK */
if (tty_insert_flip_char(tty, 0, TTY_BREAK))
copied++;
pr_debug("sci: BREAK detected\n");
}
#if defined(SCIF_ORER)
/* XXX: Handle SCIF overrun error */
if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) {
sci_out(port, SCLSR, 0);
if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) {
copied++;
pr_debug("sci: overrun error\n");
}
}
#endif
if (copied)
tty_flip_buffer_push(tty);
return copied;
}
/* Is the SCI ready, ie is there a char waiting? */
static int kgdb_is_char_ready(struct sci_port *port)
{
unsigned short status = sci_in(port, SCxSR);
if (status & (SCxSR_ERRORS(port) | SCxSR_BRK(port)))
kgdb_handle_error(port);
return (status & SCxSR_RDxF(port));
}
/* Breakpoint if there's a break sent on the serial port */
static void kgdb_break_interrupt(int irq, void *ptr, struct pt_regs *regs)
{
struct sci_port *port = ptr;
unsigned short status = sci_in(port, SCxSR);
if (status & SCxSR_BRK(port)) {
/* Break into the debugger if a break is detected */
BREAKPOINT();
/* Clear */
sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
}
}
