u-boot/arch/powerpc/cpu/mpc5xx/serial.c
Stefan Roese a47a12becf Move arch/ppc to arch/powerpc
As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>
2010-04-21 23:42:38 +02:00

170 lines
3.6 KiB
C

/*
* (C) Copyright 2003
* Martin Winistoerfer, martinwinistoerfer@gmx.ch.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation,
*/
/*
* File: serial.c
*
* Discription: Serial interface driver for SCI1 and SCI2.
* Since this code will be called from ROM use
* only non-static local variables.
*
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <mpc5xx.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Local function prototypes
*/
static int ready_to_send(void);
/*
* Minimal global serial functions needed to use one of the SCI modules.
*/
int serial_init (void)
{
volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
serial_setbrg();
#if defined(CONFIG_5xx_CONS_SCI1)
/* 10-Bit, 1 start bit, 8 data bit, no parity, 1 stop bit */
immr->im_qsmcm.qsmcm_scc1r1 = SCI_M_10;
immr->im_qsmcm.qsmcm_scc1r1 = SCI_TE | SCI_RE;
#else
immr->im_qsmcm.qsmcm_scc2r1 = SCI_M_10;
immr->im_qsmcm.qsmcm_scc2r1 = SCI_TE | SCI_RE;
#endif
return 0;
}
void serial_putc(const char c)
{
volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
/* Test for completition */
if(ready_to_send()) {
#if defined(CONFIG_5xx_CONS_SCI1)
immr->im_qsmcm.qsmcm_sc1dr = (short)c;
#else
immr->im_qsmcm.qsmcm_sc2dr = (short)c;
#endif
if(c == '\n') {
if(ready_to_send());
#if defined(CONFIG_5xx_CONS_SCI1)
immr->im_qsmcm.qsmcm_sc1dr = (short)'\r';
#else
immr->im_qsmcm.qsmcm_sc2dr = (short)'\r';
#endif
}
}
}
int serial_getc(void)
{
volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
volatile short status;
unsigned char tmp;
/* New data ? */
do {
#if defined(CONFIG_5xx_CONS_SCI1)
status = immr->im_qsmcm.qsmcm_sc1sr;
#else
status = immr->im_qsmcm.qsmcm_sc2sr;
#endif
#if defined(CONFIG_WATCHDOG)
reset_5xx_watchdog (immr);
#endif
} while ((status & SCI_RDRF) == 0);
/* Read data */
#if defined(CONFIG_5xx_CONS_SCI1)
tmp = (unsigned char)(immr->im_qsmcm.qsmcm_sc1dr & SCI_SCXDR_MK);
#else
tmp = (unsigned char)( immr->im_qsmcm.qsmcm_sc2dr & SCI_SCXDR_MK);
#endif
return tmp;
}
int serial_tstc()
{
volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
short status;
/* New data character ? */
#if defined(CONFIG_5xx_CONS_SCI1)
status = immr->im_qsmcm.qsmcm_sc1sr;
#else
status = immr->im_qsmcm.qsmcm_sc2sr;
#endif
return (status & SCI_RDRF);
}
void serial_setbrg (void)
{
volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
short scxbr;
/* Set baudrate */
scxbr = (gd->cpu_clk / (32 * gd->baudrate));
#if defined(CONFIG_5xx_CONS_SCI1)
immr->im_qsmcm.qsmcm_scc1r0 = (scxbr & SCI_SCXBR_MK);
#else
immr->im_qsmcm.qsmcm_scc2r0 = (scxbr & SCI_SCXBR_MK);
#endif
}
void serial_puts (const char *s)
{
while (*s) {
serial_putc(*s);
++s;
}
}
int ready_to_send(void)
{
volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
volatile short status;
do {
#if defined(CONFIG_5xx_CONS_SCI1)
status = immr->im_qsmcm.qsmcm_sc1sr;
#else
status = immr->im_qsmcm.qsmcm_sc2sr;
#endif
#if defined(CONFIG_WATCHDOG)
reset_5xx_watchdog (immr);
#endif
} while ((status & SCI_TDRE) == 0);
return 1;
}