Commit 5da0f468 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Greg Kroah-Hartman
Browse files

serial: sh-sci: Correct SCIF_ERROR_CLEAR for plain SCIF 



SCIF_ERROR_CLEAR includes SCIFA_ORER, which exists only on SCIFA/SCIFB
and SCIF on sh7705/sh7720/sh7721.

To fix this:
  1. Remove SCIFA_ORER from the definition of SCIF_ERROR_CLEAR,
  2. During initialization, store the error clear mask to use,
     incorporating the overrun bit only if it applies to the SCxSR
     register.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a9efeca6

drivers/tty/serial/sh-sci.c

+11 −3
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ struct sci_port { 
	unsigned int		overrun_reg;

	unsigned int		overrun_mask;

	unsigned int		error_mask;

	unsigned int		error_clear;

	unsigned int		sampling_rate;

	resource_size_t		reg_size;
@@ -2319,15 +2320,22 @@ static int sci_init_single(struct platform_device *dev, 
	/*

	 * Establish some sensible defaults for the error detection.

	 */

	sci_port->error_mask = (p->type == PORT_SCI) ?

			SCI_DEFAULT_ERROR_MASK : SCIF_DEFAULT_ERROR_MASK;

	if (p->type == PORT_SCI) {

		sci_port->error_mask = SCI_DEFAULT_ERROR_MASK;

		sci_port->error_clear = SCI_ERROR_CLEAR;

	} else {

		sci_port->error_mask = SCIF_DEFAULT_ERROR_MASK;

		sci_port->error_clear = SCIF_ERROR_CLEAR;

	}



	/*

	 * Make the error mask inclusive of overrun detection, if

	 * supported.

	 */

	if (sci_port->overrun_reg == SCxSR)

	if (sci_port->overrun_reg == SCxSR) {

		sci_port->error_mask |= sci_port->overrun_mask;

		sci_port->error_clear &= ~sci_port->overrun_mask;

	}



	port->type		= p->type;

	port->flags		= UPF_FIXED_PORT | p->flags;

drivers/tty/serial/sh-sci.h

+2 −2
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ enum { 
#define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_BRK | SCIF_ER)



#define SCIF_RDxF_CLEAR		(u32)(~(SCIF_DR | SCIF_RDF))

#define SCIF_ERROR_CLEAR	(u32)(~(SCIFA_ORER | SCIF_PER | SCIF_FER | SCIF_ER))

#define SCIF_ERROR_CLEAR	(u32)(~(SCIF_PER | SCIF_FER | SCIF_ER))

#define SCIF_TDxE_CLEAR		(u32)(~(SCIF_TDFE))

#define SCIF_BREAK_CLEAR	(u32)(~(SCIF_PER | SCIF_FER | SCIF_BRK))
@@ -122,7 +122,7 @@ enum { 
#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)

	(to_sci_port(port)->error_clear)

#define SCxSR_TDxE_CLEAR(port) \

	(((port)->type == PORT_SCI) ? SCI_TDxE_CLEAR : SCIF_TDxE_CLEAR)

#define SCxSR_BREAK_CLEAR(port) \

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