Sets reasonable trigger defaults for the various SCIF variants.
Also corrects the FIFO size for SH7705-style ports.
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
drivers/tty/serial/sh-sci.c | 29 ++++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index b89e6f8..ae9b10a 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -148,6 +148,7 @@ struct sci_port {
struct timer_list rx_timer;
unsigned int rx_timeout;
#endif
+ int rx_trigger;
bool has_rtscts;
bool autorts;
@@ -450,7 +451,7 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
[SCFCR] = { 0x18, 16 },
[SCFDR] = { 0x1c, 16 },
},
- .fifosize = 16,
+ .fifosize = 64,
.overrun_reg = SCxSR,
.overrun_mask = SCIFA_ORER,
.sampling_rate_mask = SCI_SR(16),
@@ -2062,6 +2063,7 @@ static void sci_reset(struct uart_port *port)
{
const struct plat_sci_reg *reg;
unsigned int status;
+ struct sci_port *s = to_sci_port(port);
if (serial_port_in(port, SCSCR) & SCSCR_TE) {
do {
@@ -2083,6 +2085,9 @@ static void sci_reset(struct uart_port *port)
status &= ~(SCLSR_TO | SCLSR_ORER);
serial_port_out(port, SCLSR, status);
}
+
+ if (s->rx_trigger > 1)
+ scif_set_rtrg(port, s->rx_trigger);
}
static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
@@ -2621,6 +2626,28 @@ static int sci_init_single(struct platform_device *dev,
if (unlikely(sci_port->params == NULL))
return -EINVAL;
+ switch (p->type) {
+ case PORT_SCIFB:
+ sci_port->rx_trigger = 48;
+ break;
+ case PORT_HSCIF:
+ sci_port->rx_trigger = 64;
+ break;
+ case PORT_SCIFA:
+ sci_port->rx_trigger = 32;
+ break;
+ case PORT_SCIF:
+ if (p->regtype == SCIx_SH7705_SCIF_REGTYPE)
+ /* RX triggering not implemented for this IP */
+ sci_port->rx_trigger = 1;
+ else
+ sci_port->rx_trigger = 8;
+ break;
+ default:
+ sci_port->rx_trigger = 1;
+ break;
+ }
+
/* SCIFA on sh7723 and sh7724 need a custom sampling rate that doesn't
* match the SoC datasheet, this should be investigated. Let platform
* data override the sampling rate for now.
--
2.7.4
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