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IXP: Add full baud-rate support for ixp42x, ixp45x and ixp46x

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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2007-12-08 16:34:08 +01:00 • committed by Wolfgang Denk
parent a2df4da31b
commit 7b74ebe723
1 changed files with 10 additions and 14 deletions
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24
cpu/ixp/serial.c
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@ -31,25 +31,22 @@
#include <common.h> #include <common.h>
#include <asm/arch/ixp425.h> #include <asm/arch/ixp425.h>
/*
* 14.7456 MHz
* Baud Rate = --------------
* 16 x Divisor
*/
#define SERIAL_CLOCK 921600
DECLARE_GLOBAL_DATA_PTR; DECLARE_GLOBAL_DATA_PTR;
void serial_setbrg (void) void serial_setbrg (void)
{ {
unsigned int quot = 0; unsigned int quot = 0;
int uart = CFG_IXP425_CONSOLE; int uart = CFG_IXP425_CONSOLE;
if (gd->baudrate == 1200) if ((gd->baudrate <= SERIAL_CLOCK) && (SERIAL_CLOCK % gd->baudrate == 0))
quot = 192; quot = SERIAL_CLOCK / gd->baudrate;
else if (gd->baudrate == 9600)
quot = 96;
else if (gd->baudrate == 19200)
quot = 48;
else if (gd->baudrate == 38400)
quot = 24;
else if (gd->baudrate == 57600)
quot = 16;
else if (gd->baudrate == 115200)
quot = 8;
else else
hang (); hang ();
@ -65,7 +62,6 @@ void serial_setbrg (void)
IER(uart) = IER_UUE; IER(uart) = IER_UUE;
} }
/* /*
* Initialise the serial port with the given baudrate. The settings * Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits. * are always 8 data bits, no parity, 1 stop bit, no start bits.