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serial: sh-sci: Replace hardcoded overrun bit values

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Add the missing overrun bit definition for (H)SCIF.
Replace overrun_bit by overrun_mask, so we can use the existing
defines instead of hardcoded values.

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 2015-04-30 18:21:31 +02:00 committed by Greg Kroah-Hartman
parent 2922598cd9
commit 75c249fd7c
2 changed files with 16 additions and 15 deletions
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28
drivers/tty/serial/sh-sci.c
View file

@ -81,7 +81,7 @@ struct sci_port {
/* Platform configuration */
struct plat_sci_port *cfg;
int overrun_bit;
unsigned int overrun_mask;
unsigned int error_mask;
unsigned int sampling_rate;
@ -803,7 +803,7 @@ static int sci_handle_errors(struct uart_port *port)
struct sci_port *s = to_sci_port(port);
/* Handle overruns */
if (status & (1 << s->overrun_bit)) {
if (status & s->overrun_mask) {
port->icount.overrun++;
/* overrun error */
@ -867,7 +867,7 @@ static int sci_handle_fifo_overrun(struct uart_port *port)
struct sci_port *s = to_sci_port(port);
struct plat_sci_reg *reg;
int copied = 0, offset;
u16 status, bit;
u16 status;
switch (port->type) {
case PORT_SCIF:
@ -887,10 +887,8 @@ static int sci_handle_fifo_overrun(struct uart_port *port)
return 0;
status = serial_port_in(port, offset);
bit = 1 << s->overrun_bit;
if (status & bit) {
status &= ~bit;
if (status & s->overrun_mask) {
status &= ~s->overrun_mask;
serial_port_out(port, offset, status);
port->icount.overrun++;
@ -1081,7 +1079,7 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
ret = sci_br_interrupt(irq, ptr);
/* Overrun Interrupt */
if (orer_status & (1 << s->overrun_bit))
if (orer_status & s->overrun_mask)
sci_handle_fifo_overrun(port);
return ret;
@ -2256,32 +2254,32 @@ static int sci_init_single(struct platform_device *dev,
switch (p->type) {
case PORT_SCIFB:
port->fifosize = 256;
sci_port->overrun_bit = 9;
sci_port->overrun_mask = SCIFA_ORER;
sampling_rate = 16;
break;
case PORT_HSCIF:
port->fifosize = 128;
sampling_rate = 0;
sci_port->overrun_bit = 0;
sci_port->overrun_mask = SCLSR_ORER;
break;
case PORT_SCIFA:
port->fifosize = 64;
sci_port->overrun_bit = 9;
sci_port->overrun_mask = SCIFA_ORER;
sampling_rate = 16;
break;
case PORT_SCIF:
port->fifosize = 16;
if (p->regtype == SCIx_SH7705_SCIF_REGTYPE) {
sci_port->overrun_bit = 9;
sci_port->overrun_mask = SCIFA_ORER;
sampling_rate = 16;
} else {
sci_port->overrun_bit = 0;
sci_port->overrun_mask = SCLSR_ORER;
sampling_rate = 32;
}
break;
default:
port->fifosize = 1;
sci_port->overrun_bit = 5;
sci_port->overrun_mask = SCI_ORER;
sampling_rate = 32;
break;
}
@ -2335,7 +2333,7 @@ static int sci_init_single(struct platform_device *dev,
* Make the error mask inclusive of overrun detection, if
* supported.
*/
sci_port->error_mask |= 1 << sci_port->overrun_bit;
sci_port->error_mask |= sci_port->overrun_mask;
port->type = p->type;
port->flags = UPF_FIXED_PORT | p->flags;

3
drivers/tty/serial/sh-sci.h
View file

@ -87,6 +87,9 @@ enum {
#define SCFCR_RFRST BIT(1) /* Receive FIFO Data Register Reset */
#define SCFCR_LOOP BIT(0) /* Loopback Test */
/* SCLSR (Line Status Register) on (H)SCIF */
#define SCLSR_ORER BIT(0) /* Overrun Error */
/* SCSPTR (Serial Port Register), optional */
#define SCSPTR_RTSIO BIT(7) /* Serial Port RTS Pin Input/Output */
#define SCSPTR_RTSDT BIT(6) /* Serial Port RTS Pin Data */