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authorNobuhiro Iwamatsu <iwamatsu@nigauri.org>2010-10-26 03:55:15 +0900
committerNobuhiro Iwamatsu <iwamatsu@nigauri.org>2011-01-11 21:03:25 +0900
commit3f6c8e36c58736d34a09287f013ee6c5f02ef7aa (patch)
tree95bb1050cf8abb10e04cc079133074950021349f /drivers/serial/serial_sh.c
parent0e7790d450000c1a2cda40458adb28707eaa5041 (diff)
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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>
Diffstat (limited to 'drivers/serial/serial_sh.c')
-rw-r--r--drivers/serial/serial_sh.c200
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;
}