sh: serial: Update serial driver for SH

I copied the setting of CPU from Linux kernel and commonized it.
By this, we can communalize a kernel and information.
And added the serial setting of many CPU's.

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

1 files changed, 73 insertions, 127 deletions

diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c
index 0103a29..fcf69ab 100644
--- a/drivers/serial/serial_sh.c
+++ b/drivers/serial/serial_sh.c
@@ -1,6 +1,7 @@
 /*
  * SuperH SCIF device driver.
- * Copyright (c) 2007,2008 Nobuhiro Iwamatsu
+ * Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu
+ * Copyright (C) 2002 - 2008  Paul Mundt
  *
  * 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
@@ -20,8 +21,7 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/processor.h>
-
-DECLARE_GLOBAL_DATA_PTR;
+#include "serial_sh.h"
 
 #if defined(CONFIG_CONS_SCIF0)
 # define SCIF_BASE	SCIF0_BASE
@@ -39,139 +39,88 @@ DECLARE_GLOBAL_DATA_PTR;
 # error "Default SCIF doesn't set....."
 #endif
 
-/* Base register */
-#define SCSMR	(vu_short *)(SCIF_BASE + 0x0)
-#define SCBRR	(vu_char  *)(SCIF_BASE + 0x4)
-#define SCSCR	(vu_short *)(SCIF_BASE + 0x8)
-#define SCFCR	(vu_short *)(SCIF_BASE + 0x18)
-#define SCFDR	(vu_short *)(SCIF_BASE + 0x1C)
-#if defined(CONFIG_CPU_SH7720) || \
-	(defined(CONFIG_CPU_SH7723) && defined(CONFIG_SCIF_A))
-# define SCFSR	(vu_short *)(SCIF_BASE + 0x14)	/* SCSSR */
-# define SCFTDR	(vu_char  *)(SCIF_BASE + 0x20)
-# define SCFRDR	(vu_char  *)(SCIF_BASE + 0x24)
+#if defined(CONFIG_SCIF_A)
+	#define SCIF_BASE_PORT	PORT_SCIFA
 #else
-# define SCFTDR (vu_char  *)(SCIF_BASE + 0xC)
-# define SCFSR	(vu_short *)(SCIF_BASE + 0x10)
-# define SCFRDR (vu_char  *)(SCIF_BASE + 0x14)
+	#define SCIF_BASE_PORT	PORT_SCIF
 #endif
 
-#if	defined(CONFIG_CPU_SH7780) || \
-	defined(CONFIG_CPU_SH7785)
-# define SCRFDR	(vu_short *)(SCIF_BASE + 0x20)
-# define SCSPTR	(vu_short *)(SCIF_BASE + 0x24)
-# define SCLSR	(vu_short *)(SCIF_BASE + 0x28)
-# define SCRER	(vu_short *)(SCIF_BASE + 0x2C)
-# define LSR_ORER	1
-# define FIFOLEVEL_MASK	0xFF
-#elif defined(CONFIG_CPU_SH7763)
-# if defined(CONFIG_CONS_SCIF2)
-# define SCSPTR	(vu_short *)(SCIF_BASE + 0x20)
-# define SCLSR	(vu_short *)(SCIF_BASE + 0x24)
-# define LSR_ORER	1
-# define FIFOLEVEL_MASK	0x1F
-# else
-# define SCRFDR	(vu_short *)(SCIF_BASE + 0x20)
-# define SCSPTR	(vu_short *)(SCIF_BASE + 0x24)
-# define SCLSR	(vu_short *)(SCIF_BASE + 0x28)
-# define SCRER	(vu_short *)(SCIF_BASE + 0x2C)
-# define LSR_ORER	1
-# define FIFOLEVEL_MASK	0xFF
-# endif
-#elif defined(CONFIG_CPU_SH7723)
-# if defined(CONFIG_SCIF_A)
-# define SCLSR	SCFSR
-# define LSR_ORER	0x0200
-# define FIFOLEVEL_MASK	0x3F
-#else
-# define SCLSR	(vu_short *)(SCIF_BASE + 0x24)
-# define LSR_ORER	1
-# define FIFOLEVEL_MASK	0x1F
-#endif
-#elif defined(CONFIG_CPU_SH7750) || \
-	defined(CONFIG_CPU_SH7751) || \
-	defined(CONFIG_CPU_SH7722) || \
-	defined(CONFIG_CPU_SH7203)
-# define SCSPTR	(vu_short *)(SCIF_BASE + 0x20)
-# define SCLSR	(vu_short *)(SCIF_BASE + 0x24)
-# define LSR_ORER	1
-# define FIFOLEVEL_MASK	0x1F
-#elif defined(CONFIG_CPU_SH7720)
-# define SCLSR		SCFSR
-# define LSR_ORER	0x0200
-# define FIFOLEVEL_MASK	0x1F
-#elif defined(CONFIG_CPU_SH7710) || \
-	defined(CONFIG_CPU_SH7712)
-# define SCLSR	SCFSR		/* SCSSR */
-# define LSR_ORER	1
-# define FIFOLEVEL_MASK	0x1F
-#endif
-
-/* SCBRR register value setting */
-#if defined(CONFIG_CPU_SH7720)
-# define SCBRR_VALUE(bps, clk) (((clk * 2) + 16 * bps) / (32 * bps) - 1)
-#elif defined(CONFIG_CPU_SH7723) && defined(CONFIG_SCIF_A)
-/* SH7723 SCIFA use bus clock. So clock *2 */
-# define SCBRR_VALUE(bps, clk) (((clk * 2 * 2) + 16 * bps) / (32 * bps) - 1)
-#else /* Generic SuperH */
-# define SCBRR_VALUE(bps, clk) ((clk + 16 * bps) / (32 * bps) - 1)
-#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)
-
-/*----------------------------------------------------------------------*/
+static struct uart_port sh_sci = {
+	.membase	= (unsigned char*)SCIF_BASE,
+	.mapbase	= SCIF_BASE,
+	.type		= SCIF_BASE_PORT,
+};
 
 void serial_setbrg(void)
 {
-	writeb(SCBRR_VALUE(gd->baudrate, CONFIG_SYS_CLK_FREQ), SCBRR);
+	DECLARE_GLOBAL_DATA_PTR;
+	sci_out(&sh_sci, SCBRR, SCBRR_VALUE(gd->baudrate, CONFIG_SYS_CLK_FREQ));
 }
 
 int serial_init(void)
 {
-	writew((SCR_RE | SCR_TE), SCSCR);
-	writew(0, SCSMR);
-	writew(0, SCSMR);
-	writew((FCR_RFRST | FCR_TFRST), SCFCR);
-	readw(SCFCR);
-	writew(0, SCFCR);
+	sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci));
+	sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci));
+	sci_out(&sh_sci, SCSMR, 0);
+	sci_out(&sh_sci, SCSMR, 0);
+	sci_out(&sh_sci, SCFCR, SCFCR_RFRST|SCFCR_TFRST);
+	sci_in(&sh_sci, SCFCR);
+	sci_out(&sh_sci, SCFCR, 0);
 
 	serial_setbrg();
 	return 0;
 }
 
-static int serial_rx_fifo_level(void)
+#if defined(CONFIG_CPU_SH7760) || \
+	defined(CONFIG_CPU_SH7780) || \
+	defined(CONFIG_CPU_SH7785) || \
+	defined(CONFIG_CPU_SH7786)
+static int scif_rxfill(struct uart_port *port)
+{
+	return sci_in(port, SCRFDR) & 0xff;
+}
+#elif defined(CONFIG_CPU_SH7763)
+static int scif_rxfill(struct uart_port *port)
 {
-#if defined(SCRFDR)
-	return (readw(SCRFDR) >> 0) & FIFOLEVEL_MASK;
+	if ((port->mapbase == 0xffe00000) ||
+		(port->mapbase == 0xffe08000)) {
+		/* SCIF0/1*/
+		return sci_in(port, SCRFDR) & 0xff;
+	} else {
+		/* SCIF2 */
+		return sci_in(port, SCFDR) & SCIF2_RFDC_MASK;
+	}
+}
+#elif defined(CONFIG_ARCH_SH7372)
+static int scif_rxfill(struct uart_port *port)
+{
+	if (port->type == PORT_SCIFA)
+		return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
+	else
+		return sci_in(port, SCRFDR);
+}
 #else
-	return (readw(SCFDR) >> 0) & FIFOLEVEL_MASK;
+static int scif_rxfill(struct uart_port *port)
+{
+	return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
+}
 #endif
+
+static int serial_rx_fifo_level(void)
+{
+	return scif_rxfill(&sh_sci);
 }
 
 void serial_raw_putc(const char c)
 {
-	unsigned int fsr_bits_to_clear;
-
 	while (1) {
-		if (readw(SCFSR) & FSR_TEND) { /* Tx fifo is empty */
-			fsr_bits_to_clear = FSR_TEND;
+		/* Tx fifo is empty */
+		if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci))
 			break;
-		}
 	}
 
-	writeb(c, SCFTDR);
-	if (fsr_bits_to_clear != 0)
-		writew(readw(SCFSR) & ~fsr_bits_to_clear, SCFSR);
+	sci_out(&sh_sci, SCxTDR, c);
+	sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci));
 }
 
 void serial_putc(const char c)
@@ -193,27 +142,25 @@ int serial_tstc(void)
 	return serial_rx_fifo_level() ? 1 : 0;
 }
 
-#define FSR_ERR_CLEAR	0x0063
-#define RDRF_CLEAR		0x00fc
 void handle_error(void)
 {
-	readw(SCFSR);
-	writew(FSR_ERR_CLEAR, SCFSR);
-	readw(SCLSR);
-	writew(0x00, SCLSR);
+	sci_in(&sh_sci, SCxSR);
+	sci_out(&sh_sci, SCxSR, SCxSR_ERROR_CLEAR(&sh_sci));
+	sci_in(&sh_sci, SCLSR);
+	sci_out(&sh_sci, SCLSR, 0x00);
 }
 
 int serial_getc_check(void)
 {
 	unsigned short status;
 
-	status = readw(SCFSR);
+	status = sci_in(&sh_sci, SCxSR);
 
-	if (status & (FSR_FER | FSR_ER | FSR_BRK))
+	if (status & SCIF_ERRORS)
 		handle_error();
-	if (readw(SCLSR) & LSR_ORER)
+	if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci))
 		handle_error();
-	return status & (FSR_DR | FSR_RDF);
+	return status & (SCIF_DR | SCxSR_RDxF(&sh_sci));
 }
 
 int serial_getc(void)
@@ -224,16 +171,15 @@ int serial_getc(void)
 	while (!serial_getc_check())
 		;
 
-	ch = readb(SCFRDR);
-	status = readw(SCFSR);
+	ch = sci_in(&sh_sci, SCxRDR);
+	status = sci_in(&sh_sci, SCxSR);
 
-	writew(RDRF_CLEAR, SCFSR);
+	sci_out(&sh_sci, SCxSR, SCxSR_RDxF_CLEAR(&sh_sci));
 
-	if (status & (FSR_FER | FSR_FER | FSR_ER | FSR_BRK))
-		handle_error();
+	if (status & SCIF_ERRORS)
+			handle_error();
 
-	if (readw(SCLSR) & LSR_ORER)
+	if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci))
 		handle_error();
-
 	return ch;
 }