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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: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geert Uytterhoeven 2015-08-21 20:02:27 +02:00 committed by Greg Kroah-Hartman
parent a9efeca613
commit 5da0f46874
2 changed files with 13 additions and 5 deletions
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14
drivers/tty/serial/sh-sci.c
View File

@ -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;

4
drivers/tty/serial/sh-sci.h
View File

@ -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) \