serial: sh-sci: Reorder the SCxTDR write after the TDxE clear.

[pandora-kernel.git] / arch / sh / kernel / early_printk.c

diff --git a/arch/sh/kernel/early_printk.c b/arch/sh/kernel/early_printk.c
index 2f30977..a952dcf 100644 (file)
--- a/arch/sh/kernel/early_printk.c
+++ b/arch/sh/kernel/early_printk.c
@@ -63,7 +63,8 @@ static struct console bios_console = {
 #include <linux/serial_core.h>
 #include "../../../drivers/serial/sh-sci.h"
 
-#if defined(CONFIG_CPU_SUBTYPE_SH7720)
+#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7721)
 #define EPK_SCSMR_VALUE 0x000
 #define EPK_SCBRR_VALUE 0x00C
 #define EPK_FIFO_SIZE 64
@@ -74,6 +75,7 @@ static struct console bios_console = {
 #endif
 
 static struct uart_port scif_port = {
+       .type           = PORT_SCIF,
        .mapbase        = CONFIG_EARLY_SCIF_CONSOLE_PORT,
        .membase        = (char __iomem *)CONFIG_EARLY_SCIF_CONSOLE_PORT,
 };
@@ -83,9 +85,9 @@ static void scif_sercon_putc(int c)
        while (((sci_in(&scif_port, SCFDR) & EPK_FIFO_BITS) >= EPK_FIFO_SIZE))
                ;
 
-       sci_out(&scif_port, SCxTDR, c);
        sci_in(&scif_port, SCxSR);
        sci_out(&scif_port, SCxSR, 0xf3 & ~(0x20 | 0x40));
+       sci_out(&scif_port, SCxTDR, c);
 
        while ((sci_in(&scif_port, SCxSR) & 0x40) == 0)
                ;
@@ -117,7 +119,8 @@ static struct console scif_console = {
 };
 
 #if !defined(CONFIG_SH_STANDARD_BIOS)
-#if defined(CONFIG_CPU_SUBTYPE_SH7720)
+#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7721)
 static void scif_sercon_init(char *s)
 {
        sci_out(&scif_port, SCSCR, 0x0000);     /* clear TE and RE */
@@ -139,7 +142,9 @@ static void scif_sercon_init(char *s)
  */
 static void scif_sercon_init(char *s)
 {
+       struct uart_port *port = &scif_port;
        unsigned baud = DEFAULT_BAUD;
+       unsigned int status;
        char *e;
 
        if (*s == ',')
@@ -158,19 +163,25 @@ static void scif_sercon_init(char *s)
                        baud = DEFAULT_BAUD;
        }
 
-       ctrl_outw(0, scif_port.mapbase + 8);
-       ctrl_outw(0, scif_port.mapbase);
+       do {
+               status = sci_in(port, SCxSR);
+       } while (!(status & SCxSR_TEND(port)));
+
+       sci_out(port, SCSCR, 0);         /* TE=0, RE=0 */
+       sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
+       sci_out(port, SCSMR, 0);
 
        /* Set baud rate */
-       ctrl_outb((CONFIG_SH_PCLK_FREQ + 16 * baud) /
-                 (32 * baud) - 1, scif_port.mapbase + 4);
-
-       ctrl_outw(12, scif_port.mapbase + 24);
-       ctrl_outw(8, scif_port.mapbase + 24);
-       ctrl_outw(0, scif_port.mapbase + 32);
-       ctrl_outw(0x60, scif_port.mapbase + 16);
-       ctrl_outw(0, scif_port.mapbase + 36);
-       ctrl_outw(0x30, scif_port.mapbase + 8);
+       sci_out(port, SCBRR, (CONFIG_SH_PCLK_FREQ + 16 * baud) /
+               (32 * baud) - 1);
+       udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
+
+       sci_out(port, SCSPTR, 0);
+       sci_out(port, SCxSR, 0x60);
+       sci_out(port, SCLSR, 0);
+
+       sci_out(port, SCFCR, 0);
+       sci_out(port, SCSCR, 0x30);      /* TE=1, RE=1 */
 }
 #endif /* defined(CONFIG_CPU_SUBTYPE_SH7720) */
 #endif /* !defined(CONFIG_SH_STANDARD_BIOS) */
@@ -208,9 +219,11 @@ static int __init setup_early_printk(char *buf)
        if (!strncmp(buf, "serial", 6)) {
                early_console = &scif_console;
 
-#if (defined(CONFIG_CPU_SH4) || defined(CONFIG_CPU_SUBTYPE_SH7720)) && \
-    !defined(CONFIG_SH_STANDARD_BIOS)
+#if !defined(CONFIG_SH_STANDARD_BIOS)
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_CPU_SUBTYPE_SH7720) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7721)
                scif_sercon_init(buf + 6);
+#endif
 #endif
        }
 #endif