sh: First support code of SuperH.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

2 files changed, 178 insertions, 1 deletions

diff --git a/drivers/Makefile b/drivers/Makefile
index d68cba682b..a3a9986cf4 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -41,7 +41,7 @@ COBJS	= 3c589.o 5701rls.o ali512x.o atmel_usart.o \
 	  rtl8019.o rtl8139.o rtl8169.o \
 	  s3c4510b_eth.o s3c4510b_uart.o \
 	  sed13806.o sed156x.o \
-	  serial.o serial_max3100.o \
+	  serial.o serial_max3100.o serial_sh.o \
 	  serial_pl010.o serial_pl011.o serial_xuartlite.o \
 	  sl811_usb.o sm501.o smc91111.o smiLynxEM.o \
 	  status_led.o sym53c8xx.o systemace.o ahci.o \
diff --git a/drivers/serial_sh.c b/drivers/serial_sh.c
new file mode 100644
index 0000000000..fca92fdd8c
--- /dev/null
+++ b/drivers/serial_sh.c
@@ -0,0 +1,177 @@
+/*
+ * SuperH SCIF device driver.
+ * Copyright (c) 2007 Nobuhiro Iwamatsu
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+
+#ifdef CFG_SCIF_CONSOLE
+
+#if defined (CONFIG_CONS_SCIF0)
+#define SCIF_BASE	SCIF0_BASE
+#elif defined (CONFIG_CONS_SCIF1)
+#define SCIF_BASE	SCIF1_BASE
+#else
+#error "Default SCIF doesn't set....."
+#endif
+
+#define SCSMR 	(volatile unsigned short *)(SCIF_BASE + 0x0)
+#define SCBRR 	(volatile unsigned char  *)(SCIF_BASE + 0x4) 
+#define SCSCR 	(volatile unsigned short *)(SCIF_BASE + 0x8)
+#define SCFTDR 	(volatile unsigned char  *)(SCIF_BASE + 0xC)
+#define SCFSR 	(volatile unsigned short *)(SCIF_BASE + 0x10)
+#define SCFRDR 	(volatile unsigned char  *)(SCIF_BASE + 0x14)
+#define SCFCR 	(volatile unsigned short *)(SCIF_BASE + 0x18)
+#define SCFDR 	(volatile unsigned short *)(SCIF_BASE + 0x1C)
+#if defined(CONFIG_SH4A)
+#define SCRFDR	(volatile unsigned short *)(SCIF_BASE + 0x20)
+#define SCSPTR	(volatile unsigned short *)(SCIF_BASE + 0x24)
+#define SCLSR   (volatile unsigned short *)(SCIF_BASE + 0x28)
+#define SCRER	(volatile unsigned short *)(SCIF_BASE + 0x2C)
+#elif defined (CONFIG_SH4)
+#define SCSPTR 	(volatile unsigned short *)(SCIF_BASE + 0x20)
+#define SCLSR 	(volatile unsigned short *)(SCIF_BASE + 0x24)
+#elif defined (CONFIG_SH3)
+#define SCLSR 	(volatile unsigned short *)(SCIF_BASE + 0x24)
+#endif
+
+#define SCR_RE 		(1 << 4)
+#define SCR_TE 		(1 << 5) 
+#define FCR_RFRST	(1 << 1) /* RFCL */
+#define FCR_TFRST	(1 << 2) /* TFCL */
+#define FSR_DR   	(1 << 0)
+#define FSR_RDF  	(1 << 1)
+#define FSR_FER  	(1 << 3)
+#define FSR_BRK  	(1 << 4)
+#define FSR_FER  	(1 << 3)
+#define FSR_TEND 	(1 << 6)
+#define FSR_ER   	(1 << 7)
+
+/*----------------------------------------------------------------------*/
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	int divisor = gd->baudrate * 32;
+
+	*SCBRR = (CONFIG_SYS_CLK_FREQ + (divisor / 2)) / 
+						(gd->baudrate * 32) - 1;
+}
+
+int serial_init (void)
+{
+	*SCSCR = (SCR_RE | SCR_TE);
+	*SCSMR = 0 ;
+	*SCSMR = 0;
+	*SCFCR = (FCR_RFRST | FCR_TFRST);
+	*SCFCR;
+	*SCFCR = 0;
+
+	serial_setbrg();
+	return 0;
+}
+
+static int serial_tx_fifo_level (void)
+{
+	return (*SCFDR >> 8) & 0x1F;
+}
+
+static int serial_rx_fifo_level (void)
+{
+	return (*SCFDR >> 0) & 0x1F;
+}
+
+void serial_raw_putc (const char c)
+{
+	unsigned int fsr_bits_to_clear;
+
+	while (1) {
+		if (*SCFSR & FSR_TEND) {		/* Tx fifo is empty */
+			fsr_bits_to_clear = FSR_TEND;
+			break;
+		}
+	}
+
+	*SCFTDR = c;
+	if (fsr_bits_to_clear != 0)
+		*SCFSR &= ~fsr_bits_to_clear;
+}
+
+void serial_putc (const char c)
+{
+	if (c == '\n')
+		serial_raw_putc ('\r');
+	serial_raw_putc (c);
+}
+
+void serial_puts (const char *s)
+{
+	char c;
+	while ((c = *s++) != 0)
+		serial_putc (c);
+}
+
+int serial_tstc (void)
+{
+	return serial_rx_fifo_level() ? 1 : 0;
+}
+
+#define FSR_ERR_CLEAR   0x0063
+#define RDRF_CLEAR      0x00fc
+#define LSR_ORER        1
+void handle_error( void ){
+
+	(void)*SCFSR ;
+	*SCFSR = FSR_ERR_CLEAR ;
+	(void)*SCLSR ;
+	*SCLSR = 0x00 ;
+}
+
+int serial_getc_check( void ){
+	unsigned short status;
+
+	status = *SCFSR ;
+
+	if (status & (FSR_FER | FSR_FER | FSR_ER | FSR_BRK))
+		handle_error();
+	if( *SCLSR & LSR_ORER )
+		handle_error();
+	return (status & ( FSR_DR | FSR_RDF ));
+}
+
+int serial_getc (void)
+{
+	unsigned short status ;
+	char ch;
+	while(!serial_getc_check());
+
+	ch = *SCFRDR;
+	status =  *SCFSR ;
+
+	*SCFSR = RDRF_CLEAR ;
+
+	if (status & (FSR_FER | FSR_FER | FSR_ER | FSR_BRK))
+		handle_error();
+
+	if( *SCLSR & LSR_ORER )
+		handle_error();
+
+	return ch ;
+}
+
+#endif	/* CFG_SCIF_CONSOLE */