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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>
This commit is contained in:
Nobuhiro Iwamatsu 2008-01-17 15:53:52 +09:00
parent f91d7ae5ca
commit ac331da07d
1 changed files with 15 additions and 19 deletions
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34
drivers/serial/serial_sh.c
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@ -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 */
#else
# define SCLSR (vu_short *)(SCIF_BASE + 0x24)
#endif
#ifdef CONFIG_CPU_SH7720 /* SH7720 specific */
#define SCLSR (vu_short *)(SCIF_BASE + 0x24)
#define LSR_ORER 0x0200
#else
#define SCLSR SCFSR /* SCSSR */
#define LSR_ORER 1
#endif
#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)