serial: sh-sci: use serial_port_in/out vs sci_in/out.

Follows the 8250 change for pretty much the same rationale.

See commit "serial: use serial_port_in/out vs serial_in/out in 8250".

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index bf461cf..3158e17 100644 (file)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -355,9 +355,6 @@ static void sci_serial_out(struct uart_port *p, int offset, int value)
                WARN(1, "Invalid register access\n");
 }
 
-#define sci_in(up, offset)             (up->serial_in(up, offset))
-#define sci_out(up, offset, value)     (up->serial_out(up, offset, value))
-
 static int sci_probe_regmap(struct plat_sci_port *cfg)
 {
        switch (cfg->type) {
@@ -422,9 +419,9 @@ static int sci_poll_get_char(struct uart_port *port)
        int c;
 
        do {
-               status = sci_in(port, SCxSR);
+               status = serial_port_in(port, SCxSR);
                if (status & SCxSR_ERRORS(port)) {
-                       sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
+                       serial_port_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
                        continue;
                }
                break;
@@ -433,11 +430,11 @@ static int sci_poll_get_char(struct uart_port *port)
        if (!(status & SCxSR_RDxF(port)))
                return NO_POLL_CHAR;
 
-       c = sci_in(port, SCxRDR);
+       c = serial_port_in(port, SCxRDR);
 
        /* Dummy read */
-       sci_in(port, SCxSR);
-       sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
+       serial_port_in(port, SCxSR);
+       serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
 
        return c;
 }
@@ -448,11 +445,11 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c)
        unsigned short status;
 
        do {
-               status = sci_in(port, SCxSR);
+               status = serial_port_in(port, SCxSR);
        } while (!(status & SCxSR_TDxE(port)));
 
-       sci_out(port, SCxTDR, c);
-       sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
+       serial_port_out(port, SCxTDR, c);
+       serial_port_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
 }
 #endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */
 
@@ -480,10 +477,10 @@ static void sci_init_pins(struct uart_port *port, unsigned int cflag)
            ((!(cflag & CRTSCTS)))) {
                unsigned short status;
 
-               status = sci_in(port, SCSPTR);
+               status = serial_port_in(port, SCSPTR);
                status &= ~SCSPTR_CTSIO;
                status |= SCSPTR_RTSIO;
-               sci_out(port, SCSPTR, status); /* Set RTS = 1 */
+               serial_port_out(port, SCSPTR, status); /* Set RTS = 1 */
        }
 }
 
@@ -493,13 +490,13 @@ static int sci_txfill(struct uart_port *port)
 
        reg = sci_getreg(port, SCTFDR);
        if (reg->size)
-               return sci_in(port, SCTFDR) & 0xff;
+               return serial_port_in(port, SCTFDR) & 0xff;
 
        reg = sci_getreg(port, SCFDR);
        if (reg->size)
-               return sci_in(port, SCFDR) >> 8;
+               return serial_port_in(port, SCFDR) >> 8;
 
-       return !(sci_in(port, SCxSR) & SCI_TDRE);
+       return !(serial_port_in(port, SCxSR) & SCI_TDRE);
 }
 
 static int sci_txroom(struct uart_port *port)
@@ -513,13 +510,13 @@ static int sci_rxfill(struct uart_port *port)
 
        reg = sci_getreg(port, SCRFDR);
        if (reg->size)
-               return sci_in(port, SCRFDR) & 0xff;
+               return serial_port_in(port, SCRFDR) & 0xff;
 
        reg = sci_getreg(port, SCFDR);
        if (reg->size)
-               return sci_in(port, SCFDR) & ((port->fifosize << 1) - 1);
+               return serial_port_in(port, SCFDR) & ((port->fifosize << 1) - 1);
 
-       return (sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0;
+       return (serial_port_in(port, SCxSR) & SCxSR_RDxF(port)) != 0;
 }
 
 /*
@@ -547,14 +544,14 @@ static void sci_transmit_chars(struct uart_port *port)
        unsigned short ctrl;
        int count;
 
-       status = sci_in(port, SCxSR);
+       status = serial_port_in(port, SCxSR);
        if (!(status & SCxSR_TDxE(port))) {
-               ctrl = sci_in(port, SCSCR);
+               ctrl = serial_port_in(port, SCSCR);
                if (uart_circ_empty(xmit))
                        ctrl &= ~SCSCR_TIE;
                else
                        ctrl |= SCSCR_TIE;
-               sci_out(port, SCSCR, ctrl);
+               serial_port_out(port, SCSCR, ctrl);
                return;
        }
 
@@ -573,27 +570,27 @@ static void sci_transmit_chars(struct uart_port *port)
                        break;
                }
 
-               sci_out(port, SCxTDR, c);
+               serial_port_out(port, SCxTDR, c);
 
                port->icount.tx++;
        } while (--count > 0);
 
-       sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
+       serial_port_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
 
        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                uart_write_wakeup(port);
        if (uart_circ_empty(xmit)) {
                sci_stop_tx(port);
        } else {
-               ctrl = sci_in(port, SCSCR);
+               ctrl = serial_port_in(port, SCSCR);
 
                if (port->type != PORT_SCI) {
-                       sci_in(port, SCxSR); /* Dummy read */
-                       sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
+                       serial_port_in(port, SCxSR); /* Dummy read */
+                       serial_port_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
                }
 
                ctrl |= SCSCR_TIE;
-               sci_out(port, SCSCR, ctrl);
+               serial_port_out(port, SCSCR, ctrl);
        }
 }
 
@@ -608,7 +605,7 @@ static void sci_receive_chars(struct uart_port *port)
        unsigned short status;
        unsigned char flag;
 
-       status = sci_in(port, SCxSR);
+       status = serial_port_in(port, SCxSR);
        if (!(status & SCxSR_RDxF(port)))
                return;
 
@@ -621,7 +618,7 @@ static void sci_receive_chars(struct uart_port *port)
                        break;
 
                if (port->type == PORT_SCI) {
-                       char c = sci_in(port, SCxRDR);
+                       char c = serial_port_in(port, SCxRDR);
                        if (uart_handle_sysrq_char(port, c) ||
                            sci_port->break_flag)
                                count = 0;
@@ -629,9 +626,9 @@ static void sci_receive_chars(struct uart_port *port)
                                tty_insert_flip_char(tty, c, TTY_NORMAL);
                } else {
                        for (i = 0; i < count; i++) {
-                               char c = sci_in(port, SCxRDR);
+                               char c = serial_port_in(port, SCxRDR);
 
-                               status = sci_in(port, SCxSR);
+                               status = serial_port_in(port, SCxSR);
 #if defined(CONFIG_CPU_SH3)
                                /* Skip "chars" during break */
                                if (sci_port->break_flag) {
@@ -672,8 +669,8 @@ static void sci_receive_chars(struct uart_port *port)
                        }
                }
 
-               sci_in(port, SCxSR); /* dummy read */
-               sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
+               serial_port_in(port, SCxSR); /* dummy read */
+               serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
 
                copied += count;
                port->icount.rx += count;
@@ -683,8 +680,8 @@ static void sci_receive_chars(struct uart_port *port)
                /* Tell the rest of the system the news. New characters! */
                tty_flip_buffer_push(tty);
        } else {
-               sci_in(port, SCxSR); /* dummy read */
-               sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
+               serial_port_in(port, SCxSR); /* dummy read */
+               serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
        }
 }
 
@@ -726,7 +723,7 @@ static void sci_break_timer(unsigned long data)
 static int sci_handle_errors(struct uart_port *port)
 {
        int copied = 0;
-       unsigned short status = sci_in(port, SCxSR);
+       unsigned short status = serial_port_in(port, SCxSR);
        struct tty_struct *tty = port->state->port.tty;
        struct sci_port *s = to_sci_port(port);
 
@@ -804,8 +801,8 @@ static int sci_handle_fifo_overrun(struct uart_port *port)
        if (!reg->size)
                return 0;
 
-       if ((sci_in(port, SCLSR) & (1 << s->cfg->overrun_bit))) {
-               sci_out(port, SCLSR, 0);
+       if ((serial_port_in(port, SCLSR) & (1 << s->cfg->overrun_bit))) {
+               serial_port_out(port, SCLSR, 0);
 
                port->icount.overrun++;
 
@@ -822,7 +819,7 @@ static int sci_handle_fifo_overrun(struct uart_port *port)
 static int sci_handle_breaks(struct uart_port *port)
 {
        int copied = 0;
-       unsigned short status = sci_in(port, SCxSR);
+       unsigned short status = serial_port_in(port, SCxSR);
        struct tty_struct *tty = port->state->port.tty;
        struct sci_port *s = to_sci_port(port);
 
@@ -859,8 +856,8 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
        struct sci_port *s = to_sci_port(port);
 
        if (s->chan_rx) {
-               u16 scr = sci_in(port, SCSCR);
-               u16 ssr = sci_in(port, SCxSR);
+               u16 scr = serial_port_in(port, SCSCR);
+               u16 ssr = serial_port_in(port, SCxSR);
 
                /* Disable future Rx interrupts */
                if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
@@ -869,9 +866,9 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
                } else {
                        scr &= ~SCSCR_RIE;
                }
-               sci_out(port, SCSCR, scr);
+               serial_port_out(port, SCSCR, scr);
                /* Clear current interrupt */
-               sci_out(port, SCxSR, ssr & ~(1 | SCxSR_RDxF(port)));
+               serial_port_out(port, SCxSR, ssr & ~(1 | SCxSR_RDxF(port)));
                dev_dbg(port->dev, "Rx IRQ %lu: setup t-out in %u jiffies\n",
                        jiffies, s->rx_timeout);
                mod_timer(&s->rx_timer, jiffies + s->rx_timeout);
@@ -909,15 +906,15 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr)
        if (port->type == PORT_SCI) {
                if (sci_handle_errors(port)) {
                        /* discard character in rx buffer */
-                       sci_in(port, SCxSR);
-                       sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
+                       serial_port_in(port, SCxSR);
+                       serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
                }
        } else {
                sci_handle_fifo_overrun(port);
                sci_rx_interrupt(irq, ptr);
        }
 
-       sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
+       serial_port_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
 
        /* Kick the transmission */
        sci_tx_interrupt(irq, ptr);
@@ -931,7 +928,7 @@ static irqreturn_t sci_br_interrupt(int irq, void *ptr)
 
        /* Handle BREAKs */
        sci_handle_breaks(port);
-       sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
+       serial_port_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
 
        return IRQ_HANDLED;
 }
@@ -955,8 +952,8 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
        struct sci_port *s = to_sci_port(port);
        irqreturn_t ret = IRQ_NONE;
 
-       ssr_status = sci_in(port, SCxSR);
-       scr_status = sci_in(port, SCSCR);
+       ssr_status = serial_port_in(port, SCxSR);
+       scr_status = serial_port_in(port, SCSCR);
        err_enabled = scr_status & port_rx_irq_mask(port);
 
        /* Tx Interrupt */
@@ -1170,7 +1167,7 @@ static void sci_free_gpios(struct sci_port *port)
 
 static unsigned int sci_tx_empty(struct uart_port *port)
 {
-       unsigned short status = sci_in(port, SCxSR);
+       unsigned short status = serial_port_in(port, SCxSR);
        unsigned short in_tx_fifo = sci_txfill(port);
 
        return (status & SCxSR_TEND(port)) && !in_tx_fifo ? TIOCSER_TEMT : 0;
@@ -1198,7 +1195,7 @@ static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
                 */
                reg = sci_getreg(port, SCFCR);
                if (reg->size)
-                       sci_out(port, SCFCR, sci_in(port, SCFCR) | 1);
+                       serial_port_out(port, SCFCR, serial_port_in(port, SCFCR) | 1);
        }
 }
 
@@ -1240,8 +1237,8 @@ static void sci_dma_tx_complete(void *arg)
        } else {
                s->cookie_tx = -EINVAL;
                if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
-                       u16 ctrl = sci_in(port, SCSCR);
-                       sci_out(port, SCSCR, ctrl & ~SCSCR_TIE);
+                       u16 ctrl = serial_port_in(port, SCSCR);
+                       serial_port_out(port, SCSCR, ctrl & ~SCSCR_TIE);
                }
        }
 
@@ -1494,13 +1491,13 @@ static void sci_start_tx(struct uart_port *port)
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
        if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
-               u16 new, scr = sci_in(port, SCSCR);
+               u16 new, scr = serial_port_in(port, SCSCR);
                if (s->chan_tx)
                        new = scr | 0x8000;
                else
                        new = scr & ~0x8000;
                if (new != scr)
-                       sci_out(port, SCSCR, new);
+                       serial_port_out(port, SCSCR, new);
        }
 
        if (s->chan_tx && !uart_circ_empty(&s->port.state->xmit) &&
@@ -1512,8 +1509,8 @@ static void sci_start_tx(struct uart_port *port)
 
        if (!s->chan_tx || port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
                /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */
-               ctrl = sci_in(port, SCSCR);
-               sci_out(port, SCSCR, ctrl | SCSCR_TIE);
+               ctrl = serial_port_in(port, SCSCR);
+               serial_port_out(port, SCSCR, ctrl | SCSCR_TIE);
        }
 }
 
@@ -1522,40 +1519,40 @@ static void sci_stop_tx(struct uart_port *port)
        unsigned short ctrl;
 
        /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */
-       ctrl = sci_in(port, SCSCR);
+       ctrl = serial_port_in(port, SCSCR);
 
        if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
                ctrl &= ~0x8000;
 
        ctrl &= ~SCSCR_TIE;
 
-       sci_out(port, SCSCR, ctrl);
+       serial_port_out(port, SCSCR, ctrl);
 }
 
 static void sci_start_rx(struct uart_port *port)
 {
        unsigned short ctrl;
 
-       ctrl = sci_in(port, SCSCR) | port_rx_irq_mask(port);
+       ctrl = serial_port_in(port, SCSCR) | port_rx_irq_mask(port);
 
        if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
                ctrl &= ~0x4000;
 
-       sci_out(port, SCSCR, ctrl);
+       serial_port_out(port, SCSCR, ctrl);
 }
 
 static void sci_stop_rx(struct uart_port *port)
 {
        unsigned short ctrl;
 
-       ctrl = sci_in(port, SCSCR);
+       ctrl = serial_port_in(port, SCSCR);
 
        if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
                ctrl &= ~0x4000;
 
        ctrl &= ~port_rx_irq_mask(port);
 
-       sci_out(port, SCSCR, ctrl);
+       serial_port_out(port, SCSCR, ctrl);
 }
 
 static void sci_enable_ms(struct uart_port *port)
@@ -1589,13 +1586,13 @@ static void rx_timer_fn(unsigned long arg)
 {
        struct sci_port *s = (struct sci_port *)arg;
        struct uart_port *port = &s->port;
-       u16 scr = sci_in(port, SCSCR);
+       u16 scr = serial_port_in(port, SCSCR);
 
        if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
                scr &= ~0x4000;
                enable_irq(s->cfg->irqs[1]);
        }
-       sci_out(port, SCSCR, scr | SCSCR_RIE);
+       serial_port_out(port, SCSCR, scr | SCSCR_RIE);
        dev_dbg(port->dev, "DMA Rx timed out\n");
        schedule_work(&s->work_rx);
 }
@@ -1776,14 +1773,14 @@ static void sci_reset(struct uart_port *port)
        unsigned int status;
 
        do {
-               status = sci_in(port, SCxSR);
+               status = serial_port_in(port, SCxSR);
        } while (!(status & SCxSR_TEND(port)));
 
-       sci_out(port, SCSCR, 0x00);     /* TE=0, RE=0, CKE1=0 */
+       serial_port_out(port, SCSCR, 0x00);     /* TE=0, RE=0, CKE1=0 */
 
        reg = sci_getreg(port, SCFCR);
        if (reg->size)
-               sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
+               serial_port_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
 }
 
 static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
@@ -1812,7 +1809,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 
        sci_reset(port);
 
-       smr_val = sci_in(port, SCSMR) & 3;
+       smr_val = serial_port_in(port, SCSMR) & 3;
 
        if ((termios->c_cflag & CSIZE) == CS7)
                smr_val |= 0x40;
@@ -1825,19 +1822,19 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 
        uart_update_timeout(port, termios->c_cflag, baud);
 
-       sci_out(port, SCSMR, smr_val);
+       serial_port_out(port, SCSMR, smr_val);
 
        dev_dbg(port->dev, "%s: SMR %x, t %x, SCSCR %x\n", __func__, smr_val, t,
                s->cfg->scscr);
 
        if (t > 0) {
                if (t >= 256) {
-                       sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1);
+                       serial_port_out(port, SCSMR, (serial_port_in(port, SCSMR) & ~3) | 1);
                        t >>= 2;
                } else
-                       sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3);
+                       serial_port_out(port, SCSMR, serial_port_in(port, SCSMR) & ~3);
 
-               sci_out(port, SCBRR, t);
+               serial_port_out(port, SCBRR, t);
                udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
        }
 
@@ -1845,7 +1842,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 
        reg = sci_getreg(port, SCFCR);
        if (reg->size) {
-               unsigned short ctrl = sci_in(port, SCFCR);
+               unsigned short ctrl = serial_port_in(port, SCFCR);
 
                if (s->cfg->capabilities & SCIx_HAVE_RTSCTS) {
                        if (termios->c_cflag & CRTSCTS)
@@ -1861,10 +1858,10 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
                 */
                ctrl &= ~(SCFCR_RFRST | SCFCR_TFRST);
 
-               sci_out(port, SCFCR, ctrl);
+               serial_port_out(port, SCFCR, ctrl);
        }
 
-       sci_out(port, SCSCR, s->cfg->scscr);
+       serial_port_out(port, SCSCR, s->cfg->scscr);
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
        /*
@@ -2166,7 +2163,7 @@ static void serial_console_write(struct console *co, const char *s,
 
        /* wait until fifo is empty and last bit has been transmitted */
        bits = SCxSR_TDxE(port) | SCxSR_TEND(port);
-       while ((sci_in(port, SCxSR) & bits) != bits)
+       while ((serial_port_in(port, SCxSR) & bits) != bits)
                cpu_relax();
 
        sci_port_disable(sci_port);
@@ -2260,12 +2257,12 @@ static int sci_runtime_suspend(struct device *dev)
        if (uart_console(port)) {
                struct plat_sci_reg *reg;
 
-               sci_port->saved_smr = sci_in(port, SCSMR);
-               sci_port->saved_brr = sci_in(port, SCBRR);
+               sci_port->saved_smr = serial_port_in(port, SCSMR);
+               sci_port->saved_brr = serial_port_in(port, SCBRR);
 
                reg = sci_getreg(port, SCFCR);
                if (reg->size)
-                       sci_port->saved_fcr = sci_in(port, SCFCR);
+                       sci_port->saved_fcr = serial_port_in(port, SCFCR);
                else
                        sci_port->saved_fcr = 0;
        }
@@ -2279,13 +2276,13 @@ static int sci_runtime_resume(struct device *dev)
 
        if (uart_console(port)) {
                sci_reset(port);
-               sci_out(port, SCSMR, sci_port->saved_smr);
-               sci_out(port, SCBRR, sci_port->saved_brr);
+               serial_port_out(port, SCSMR, sci_port->saved_smr);
+               serial_port_out(port, SCBRR, sci_port->saved_brr);
 
                if (sci_port->saved_fcr)
-                       sci_out(port, SCFCR, sci_port->saved_fcr);
+                       serial_port_out(port, SCFCR, sci_port->saved_fcr);
 
-               sci_out(port, SCSCR, sci_port->cfg->scscr);
+               serial_port_out(port, SCSCR, sci_port->cfg->scscr);
        }
        return 0;
 }

diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index a1a2d36..4c22a15 100644 (file)
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -20,10 +20,10 @@
     defined(CONFIG_ARCH_SH7372) || \
     defined(CONFIG_ARCH_R8A7740)
 
-# define SCxSR_RDxF_CLEAR(port)         (sci_in(port, SCxSR) & 0xfffc)
-# define SCxSR_ERROR_CLEAR(port) (sci_in(port, SCxSR) & 0xfd73)
-# define SCxSR_TDxE_CLEAR(port)         (sci_in(port, SCxSR) & 0xffdf)
-# define SCxSR_BREAK_CLEAR(port) (sci_in(port, SCxSR) & 0xffe3)
+# define SCxSR_RDxF_CLEAR(port)         (serial_port_in(port, SCxSR) & 0xfffc)
+# define SCxSR_ERROR_CLEAR(port) (serial_port_in(port, SCxSR) & 0xfd73)
+# define SCxSR_TDxE_CLEAR(port)         (serial_port_in(port, SCxSR) & 0xffdf)
+# define SCxSR_BREAK_CLEAR(port) (serial_port_in(port, SCxSR) & 0xffe3)
 #else
 # define SCxSR_RDxF_CLEAR(port)         (((port)->type == PORT_SCI) ? 0xbc : 0x00fc)
 # define SCxSR_ERROR_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x0073)