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Fix serial console support for MCF5271.

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This commit is contained in:
Marian Balakowicz 2006-05-09 11:37:13 +02:00
parent 483a0cf804
commit 0c056f0e27
2 changed files with 18 additions and 6 deletions
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2
CHANGELOG
View file

@ -2,6 +2,8 @@
Changes since U-Boot 1.1.4:
======================================================================
* Fix serial console support for MCF5271.
* Fixes for gcc 3.4 based m68k toolchain,
based on patch by Jate Sujjavanich.

22
cpu/mcf52x2/serial.c
View file

@ -44,7 +44,7 @@
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_M5249
#if defined(CONFIG_M5249) || defined(CONFIG_M5271)
#define DoubleClock(a) ((double)(CFG_CLK/2) / 32.0 / (double)(a))
#else
#define DoubleClock(a) ((double)(CFG_CLK) / 32.0 / (double)(a))
@ -54,7 +54,10 @@ void rs_serial_setbaudrate(int port,int baudrate)
{
#if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5271)
volatile unsigned char *uartp;
double clock, fraction;
#ifndef CONFIG_M5271
double fraction;
#endif
double clock;
if (port == 0)
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
@ -63,11 +66,11 @@ void rs_serial_setbaudrate(int port,int baudrate)
clock = DoubleClock(baudrate); /* Set baud above */
fraction = ((clock - (int)clock) * 16.0) + 0.5;
uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */
uartp[MCFUART_UBG2] = ((int)clock & 0xff); /* set lsb baud */
#ifndef CONFIG_M5271
fraction = ((clock - (int)clock) * 16.0) + 0.5;
uartp[MCFUART_UFPD] = ((int)fraction & 0xf); /* set baud fraction adjust */
#endif
#endif
@ -85,8 +88,9 @@ void rs_serial_init(int port,int baudrate)
else
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2);
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; /* reset Error pointer */
@ -96,9 +100,15 @@ void rs_serial_init(int port,int baudrate)
uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
/* Mask UART interrupts */
uartp[MCFUART_UIMR] = 0;
/* Set clock Select Register: Tx/Rx clock is timer */
uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
rs_serial_setbaudrate(port,baudrate);
uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
/* Enable Tx/Rx */
uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
return;