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| author | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2008-01-17 15:53:52 +0900 |
|---|---|---|
| committer | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2008-01-17 17:34:19 +0900 |
| commit | ac331da07db3860f11fa1d0fd3db7c810bce1198 (patch) | |
| tree | d4b47c152c7e193dd363465c50f6889cc9110119 /drivers/serial/serial_sh.c | |
| parent | f91d7ae5ca89acf9fa1ed1015dc078cf29581607 (diff) | |
| download | u-boot-imx-ac331da07db3860f11fa1d0fd3db7c810bce1198.zip u-boot-imx-ac331da07db3860f11fa1d0fd3db7c810bce1198.tar.gz u-boot-imx-ac331da07db3860f11fa1d0fd3db7c810bce1198.tar.bz2 | |
sh: Update SuperH SCIF driver
This patch fixed wrong SH7720 CPU macro and changed macro that
calculated value of SCBRR register.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'drivers/serial/serial_sh.c')
| -rw-r--r-- | drivers/serial/serial_sh.c | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c index 00a9b39..70fd23f 100644 --- a/drivers/serial/serial_sh.c +++ b/drivers/serial/serial_sh.c @@ -1,6 +1,6 @@ /* * SuperH SCIF device driver. - * Copyright (c) 2007 Nobuhiro Iwamatsu + * Copyright (c) 2007,2008 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 @@ -36,7 +36,7 @@ #define SCSCR (vu_short *)(SCIF_BASE + 0x8) #define SCFCR (vu_short *)(SCIF_BASE + 0x18) #define SCFDR (vu_short *)(SCIF_BASE + 0x1C) -#ifdef CONFIG_SH7720 /* SH7720 specific */ +#ifdef CONFIG_CPU_SH7720 /* SH7720 specific */ #define SCFSR (vu_short *)(SCIF_BASE + 0x14) /* SCSSR */ #define SCFTDR (vu_char *)(SCIF_BASE + 0x20) #define SCFRDR (vu_char *)(SCIF_BASE + 0x24) @@ -57,12 +57,19 @@ #define SCLSR (vu_short *)(SCIF_BASE + 0x24) #define LSR_ORER 1 #elif defined (CONFIG_SH3) -#ifdef CONFIG_SH7720 /* SH7720 specific */ -# define SCLSR SCFSR /* SCSSR */ +#ifdef CONFIG_CPU_SH7720 /* SH7720 specific */ +#define SCLSR (vu_short *)(SCIF_BASE + 0x24) +#define LSR_ORER 0x0200 #else -# define SCLSR (vu_short *)(SCIF_BASE + 0x24) +#define SCLSR SCFSR /* SCSSR */ +#define LSR_ORER 1 #endif -#define LSR_ORER 0x0200 +#endif + +#if defined(CONFIG_CPU_SH7720) +#define SCBRR_VALUE(bps, clk) (((clk*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) @@ -82,18 +89,7 @@ void serial_setbrg (void) { DECLARE_GLOBAL_DATA_PTR; - -#if defined(CONFIG_CPU_SH7720) - int divisor = gd->baudrate * 16; - - *SCBRR = (CONFIG_SYS_CLK_FREQ * 2 + (divisor / 2)) / - (gd->baudrate * 32) - 1; -#else - int divisor = gd->baudrate * 32; - - *SCBRR = (CONFIG_SYS_CLK_FREQ + (divisor / 2)) / - (gd->baudrate * 32) - 1; -#endif + *SCBRR = SCBRR_VALUE(gd->baudrate,CONFIG_SYS_CLK_FREQ); } int serial_init (void) |