diff options
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 36 | ||||
| -rw-r--r-- | drivers/tty/serial/sh-sci.h | 33 |
2 files changed, 34 insertions, 35 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 1b2f894bdc9e..b014fce1509d 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -489,6 +489,22 @@ static void sci_port_disable(struct sci_port *sci_port) pm_runtime_put_sync(sci_port->port.dev); } +static void sci_clear_SCxSR(struct uart_port *port, unsigned int mask) +{ + if (port->type == PORT_SCI) { + /* Just store the mask */ + serial_port_out(port, SCxSR, mask); + } else if (to_sci_port(port)->overrun_mask == SCIFA_ORER) { + /* SCIFA/SCIFB and SCIF on SH7705/SH7720/SH7721 */ + /* Only clear the status bits we want to clear */ + serial_port_out(port, SCxSR, + serial_port_in(port, SCxSR) & mask); + } else { + /* Store the mask, clear parity/framing errors */ + serial_port_out(port, SCxSR, mask & ~(SCIF_FERC | SCIF_PERC)); + } +} + #if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_SH_SCI_CONSOLE) #ifdef CONFIG_CONSOLE_POLL @@ -500,7 +516,7 @@ static int sci_poll_get_char(struct uart_port *port) do { status = serial_port_in(port, SCxSR); if (status & SCxSR_ERRORS(port)) { - serial_port_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_ERROR_CLEAR(port)); continue; } break; @@ -513,7 +529,7 @@ static int sci_poll_get_char(struct uart_port *port) /* Dummy read */ serial_port_in(port, SCxSR); - serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port)); return c; } @@ -528,7 +544,7 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c) } while (!(status & SCxSR_TDxE(port))); serial_port_out(port, SCxTDR, c); - serial_port_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port)); + sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port)); } #endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */ @@ -655,7 +671,7 @@ static void sci_transmit_chars(struct uart_port *port) port->icount.tx++; } while (--count > 0); - serial_port_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port)); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); @@ -666,7 +682,7 @@ static void sci_transmit_chars(struct uart_port *port) if (port->type != PORT_SCI) { serial_port_in(port, SCxSR); /* Dummy read */ - serial_port_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port)); } ctrl |= SCSCR_TIE; @@ -750,7 +766,7 @@ static void sci_receive_chars(struct uart_port *port) } serial_port_in(port, SCxSR); /* dummy read */ - serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port)); copied += count; port->icount.rx += count; @@ -761,7 +777,7 @@ static void sci_receive_chars(struct uart_port *port) tty_flip_buffer_push(tport); } else { serial_port_in(port, SCxSR); /* dummy read */ - serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port)); } } @@ -982,14 +998,14 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr) if (sci_handle_errors(port)) { /* discard character in rx buffer */ serial_port_in(port, SCxSR); - serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port)); } } else { sci_handle_fifo_overrun(port); sci_rx_interrupt(irq, ptr); } - serial_port_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_ERROR_CLEAR(port)); /* Kick the transmission */ sci_tx_interrupt(irq, ptr); @@ -1003,7 +1019,7 @@ static irqreturn_t sci_br_interrupt(int irq, void *ptr) /* Handle BREAKs */ sci_handle_breaks(port); - serial_port_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); + sci_clear_SCxSR(port, SCxSR_BREAK_CLEAR(port)); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h index 3393f67b4e84..1e1edbd15267 100644 --- a/drivers/tty/serial/sh-sci.h +++ b/drivers/tty/serial/sh-sci.h @@ -119,28 +119,11 @@ enum { #define SCxSR_ERRORS(port) (to_sci_port(port)->error_mask) -#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \ - defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_R8A7740) - -# define SCxSR_RDxF_CLEAR(port) \ - (serial_port_in(port, SCxSR) & SCIF_RDxF_CLEAR) -# define SCxSR_ERROR_CLEAR(port) \ - (serial_port_in(port, SCxSR) & SCIF_ERROR_CLEAR) -# define SCxSR_TDxE_CLEAR(port) \ - (serial_port_in(port, SCxSR) & SCIF_TDxE_CLEAR) -# define SCxSR_BREAK_CLEAR(port) \ - (serial_port_in(port, SCxSR) & SCIF_BREAK_CLEAR) -#else -# define SCxSR_RDxF_CLEAR(port) \ - ((((port)->type == PORT_SCI) ? SCI_RDxF_CLEAR : SCIF_RDxF_CLEAR) & 0xff) -# define SCxSR_ERROR_CLEAR(port) \ - ((((port)->type == PORT_SCI) ? SCI_ERROR_CLEAR : SCIF_ERROR_CLEAR) & 0xff) -# define SCxSR_TDxE_CLEAR(port) \ - ((((port)->type == PORT_SCI) ? SCI_TDxE_CLEAR : SCIF_TDxE_CLEAR) & 0xff) -# define SCxSR_BREAK_CLEAR(port) \ - ((((port)->type == PORT_SCI) ? SCI_BREAK_CLEAR : SCIF_BREAK_CLEAR) & 0xff) -#endif - +#define SCxSR_RDxF_CLEAR(port) \ + (((port)->type == PORT_SCI) ? SCI_RDxF_CLEAR : SCIF_RDxF_CLEAR) +#define SCxSR_ERROR_CLEAR(port) \ + (((port)->type == PORT_SCI) ? SCI_ERROR_CLEAR : SCIF_ERROR_CLEAR) +#define SCxSR_TDxE_CLEAR(port) \ + (((port)->type == PORT_SCI) ? SCI_TDxE_CLEAR : SCIF_TDxE_CLEAR) +#define SCxSR_BREAK_CLEAR(port) \ + (((port)->type == PORT_SCI) ? SCI_BREAK_CLEAR : SCIF_BREAK_CLEAR) |