tty/serial/8250: make UART_MCR register access consistent

Introduce serial8250_out_MCR() and serial8250_in_MCR() routines, that
replace following calls:

serial_out(port, UART_MCR, val)
serial_port_out(up, UART_MCR, val)
serial_in(port, UART_MCR)

This patch is needed in order to integrate reading/writing of MCR
signals via SERIAL_MCTRL_GPIO infrastructure later.

Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 31b3d55..1a16fea 100644 (file)
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -129,6 +129,16 @@ void serial8250_rpm_put(struct uart_8250_port *p);
 int serial8250_em485_init(struct uart_8250_port *p);
 void serial8250_em485_destroy(struct uart_8250_port *p);
 
+static inline void serial8250_out_MCR(struct uart_8250_port *up, int value)
+{
+       serial_out(up, UART_MCR, value);
+}
+
+static inline int serial8250_in_MCR(struct uart_8250_port *up)
+{
+       return serial_in(up, UART_MCR);
+}
+
 #if defined(__alpha__) && !defined(CONFIG_PCI)
 /*
  * Digital did something really horribly wrong with the OUT1 and OUT2

diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 2c44c79..61ad6c3 100644 (file)
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -280,7 +280,7 @@ static void omap8250_restore_regs(struct uart_8250_port *up)
        serial_out(up, UART_EFR, UART_EFR_ECB);
 
        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
-       serial_out(up, UART_MCR, UART_MCR_TCRTLR);
+       serial8250_out_MCR(up, UART_MCR_TCRTLR);
        serial_out(up, UART_FCR, up->fcr);
 
        omap8250_update_scr(up, priv);
@@ -296,7 +296,7 @@ static void omap8250_restore_regs(struct uart_8250_port *up)
        serial_out(up, UART_LCR, 0);
 
        /* drop TCR + TLR access, we setup XON/XOFF later */
-       serial_out(up, UART_MCR, up->mcr);
+       serial8250_out_MCR(up, up->mcr);
        serial_out(up, UART_IER, up->ier);
 
        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index c8d8d24..bdfa659 100644 (file)
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -527,13 +527,13 @@ static void serial8250_clear_fifos(struct uart_8250_port *p)
 
 static inline void serial8250_em485_rts_after_send(struct uart_8250_port *p)
 {
-       unsigned char mcr = serial_in(p, UART_MCR);
+       unsigned char mcr = serial8250_in_MCR(p);
 
        if (p->port.rs485.flags & SER_RS485_RTS_AFTER_SEND)
                mcr |= UART_MCR_RTS;
        else
                mcr &= ~UART_MCR_RTS;
-       serial_out(p, UART_MCR, mcr);
+       serial8250_out_MCR(p, mcr);
 }
 
 static void serial8250_em485_handle_start_tx(unsigned long arg);
@@ -785,10 +785,10 @@ static int size_fifo(struct uart_8250_port *up)
        old_lcr = serial_in(up, UART_LCR);
        serial_out(up, UART_LCR, 0);
        old_fcr = serial_in(up, UART_FCR);
-       old_mcr = serial_in(up, UART_MCR);
+       old_mcr = serial8250_in_MCR(up);
        serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
                    UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
-       serial_out(up, UART_MCR, UART_MCR_LOOP);
+       serial8250_out_MCR(up, UART_MCR_LOOP);
        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
        old_dl = serial_dl_read(up);
        serial_dl_write(up, 0x0001);
@@ -800,7 +800,7 @@ static int size_fifo(struct uart_8250_port *up)
             (count < 256); count++)
                serial_in(up, UART_RX);
        serial_out(up, UART_FCR, old_fcr);
-       serial_out(up, UART_MCR, old_mcr);
+       serial8250_out_MCR(up, old_mcr);
        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
        serial_dl_write(up, old_dl);
        serial_out(up, UART_LCR, old_lcr);
@@ -1040,17 +1040,17 @@ static void autoconfig_16550a(struct uart_8250_port *up)
         * it's changed. If so, set baud_base in EXCR2 to 921600. -- dwmw2
         */
        serial_out(up, UART_LCR, 0);
-       status1 = serial_in(up, UART_MCR);
+       status1 = serial8250_in_MCR(up);
        serial_out(up, UART_LCR, 0xE0);
        status2 = serial_in(up, 0x02); /* EXCR1 */
 
        if (!((status2 ^ status1) & UART_MCR_LOOP)) {
                serial_out(up, UART_LCR, 0);
-               serial_out(up, UART_MCR, status1 ^ UART_MCR_LOOP);
+               serial8250_out_MCR(up, status1 ^ UART_MCR_LOOP);
                serial_out(up, UART_LCR, 0xE0);
                status2 = serial_in(up, 0x02); /* EXCR1 */
                serial_out(up, UART_LCR, 0);
-               serial_out(up, UART_MCR, status1);
+               serial8250_out_MCR(up, status1);
 
                if ((status2 ^ status1) & UART_MCR_LOOP) {
                        unsigned short quot;
@@ -1224,7 +1224,7 @@ static void autoconfig(struct uart_8250_port *up)
                }
        }
 
-       save_mcr = serial_in(up, UART_MCR);
+       save_mcr = serial8250_in_MCR(up);
        save_lcr = serial_in(up, UART_LCR);
 
        /*
@@ -1237,9 +1237,9 @@ static void autoconfig(struct uart_8250_port *up)
         * that conflicts with COM 1-4 --- we hope!
         */
        if (!(port->flags & UPF_SKIP_TEST)) {
-               serial_out(up, UART_MCR, UART_MCR_LOOP | 0x0A);
+               serial8250_out_MCR(up, UART_MCR_LOOP | 0x0A);
                status1 = serial_in(up, UART_MSR) & 0xF0;
-               serial_out(up, UART_MCR, save_mcr);
+               serial8250_out_MCR(up, save_mcr);
                if (status1 != 0x90) {
                        spin_unlock_irqrestore(&port->lock, flags);
                        DEBUG_AUTOCONF("LOOP test failed (%02x) ",
@@ -1305,7 +1305,7 @@ static void autoconfig(struct uart_8250_port *up)
        if (port->type == PORT_RSA)
                serial_out(up, UART_RSA_FRR, 0);
 #endif
-       serial_out(up, UART_MCR, save_mcr);
+       serial8250_out_MCR(up, save_mcr);
        serial8250_clear_fifos(up);
        serial_in(up, UART_RX);
        if (up->capabilities & UART_CAP_UUE)
@@ -1353,19 +1353,18 @@ static void autoconfig_irq(struct uart_8250_port *up)
 
        /* forget possible initially masked and pending IRQ */
        probe_irq_off(probe_irq_on());
-       save_mcr = serial_in(up, UART_MCR);
+       save_mcr = serial8250_in_MCR(up);
        save_ier = serial_in(up, UART_IER);
-       serial_out(up, UART_MCR, UART_MCR_OUT1 | UART_MCR_OUT2);
+       serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2);
 
        irqs = probe_irq_on();
-       serial_out(up, UART_MCR, 0);
+       serial8250_out_MCR(up, 0);
        udelay(10);
        if (port->flags & UPF_FOURPORT) {
-               serial_out(up, UART_MCR,
-                           UART_MCR_DTR | UART_MCR_RTS);
+               serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS);
        } else {
-               serial_out(up, UART_MCR,
-                           UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
+               serial8250_out_MCR(up,
+                       UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
        }
        serial_out(up, UART_IER, 0x0f); /* enable all intrs */
        serial_in(up, UART_LSR);
@@ -1376,7 +1375,7 @@ static void autoconfig_irq(struct uart_8250_port *up)
        udelay(20);
        irq = probe_irq_off(irqs);
 
-       serial_out(up, UART_MCR, save_mcr);
+       serial8250_out_MCR(up, save_mcr);
        serial_out(up, UART_IER, save_ier);
 
        if (port->flags & UPF_FOURPORT)
@@ -1549,14 +1548,14 @@ static inline void start_tx_rs485(struct uart_port *port)
        del_timer(&em485->stop_tx_timer);
        em485->active_timer = NULL;
 
-       mcr = serial_in(up, UART_MCR);
+       mcr = serial8250_in_MCR(up);
        if (!!(up->port.rs485.flags & SER_RS485_RTS_ON_SEND) !=
            !!(mcr & UART_MCR_RTS)) {
                if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND)
                        mcr |= UART_MCR_RTS;
                else
                        mcr &= ~UART_MCR_RTS;
-               serial_out(up, UART_MCR, mcr);
+               serial8250_out_MCR(up, mcr);
 
                if (up->port.rs485.delay_rts_before_send > 0) {
                        em485->active_timer = &em485->start_tx_timer;
@@ -1943,7 +1942,7 @@ void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl)
 
        mcr = (mcr & up->mcr_mask) | up->mcr_force | up->mcr;
 
-       serial_port_out(port, UART_MCR, mcr);
+       serial8250_out_MCR(up, mcr);
 }
 EXPORT_SYMBOL_GPL(serial8250_do_set_mctrl);
 
@@ -3090,7 +3089,7 @@ static void serial8250_console_restore(struct uart_8250_port *up)
 
        serial8250_set_divisor(port, baud, quot, frac);
        serial_port_out(port, UART_LCR, up->lcr);
-       serial_port_out(port, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
+       serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS);
 }
 
 /*