166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
/*
|
|
* (C) Copyright 2000 - 2003
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* 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, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
* Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
|
|
* changes based on the file arch/ppc/mbxboot/m8260_tty.c from the
|
|
* Linux/PPC sources (m8260_tty.c had no copyright info in it).
|
|
*/
|
|
|
|
/*
|
|
* Minimal serial functions needed to use one of the PSC ports
|
|
* as serial console interface.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <mpc5xxx.h>
|
|
|
|
#if defined(CONFIG_PSC_CONSOLE)
|
|
|
|
#if CONFIG_PSC_CONSOLE == 1
|
|
#define PSC_BASE MPC5XXX_PSC1
|
|
#elif CONFIG_PSC_CONSOLE == 2
|
|
#define PSC_BASE MPC5XXX_PSC2
|
|
#elif CONFIG_PSC_CONSOLE == 3
|
|
#define PSC_BASE MPC5XXX_PSC3
|
|
#elif defined(CONFIG_MGT5100)
|
|
#error CONFIG_PSC_CONSOLE must be in 1, 2 or 3
|
|
#elif CONFIG_PSC_CONSOLE == 4
|
|
#define PSC_BASE MPC5XXX_PSC4
|
|
#elif CONFIG_PSC_CONSOLE == 5
|
|
#define PSC_BASE MPC5XXX_PSC5
|
|
#elif CONFIG_PSC_CONSOLE == 6
|
|
#define PSC_BASE MPC5XXX_PSC6
|
|
#else
|
|
#error CONFIG_PSC_CONSOLE must be in 1 ... 6
|
|
#endif
|
|
|
|
int serial_init (void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
|
|
unsigned long baseclk;
|
|
int div;
|
|
|
|
/* reset PSC */
|
|
psc->command = PSC_SEL_MODE_REG_1;
|
|
|
|
/* select clock sources */
|
|
#if defined(CONFIG_MGT5100)
|
|
psc->psc_clock_select = 0xdd00;
|
|
baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
|
|
#elif defined(CONFIG_MPC5200)
|
|
psc->psc_clock_select = 0;
|
|
baseclk = (gd->ipb_clk + 16) / 32;
|
|
#endif
|
|
|
|
/* switch to UART mode */
|
|
psc->sicr = 0;
|
|
|
|
/* configure parity, bit length and so on */
|
|
#if defined(CONFIG_MGT5100)
|
|
psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE;
|
|
#elif defined(CONFIG_MPC5200)
|
|
psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
|
|
#endif
|
|
psc->mode = PSC_MODE_ONE_STOP;
|
|
|
|
/* set up UART divisor */
|
|
div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
|
|
psc->ctur = (div >> 8) & 0xff;
|
|
psc->ctlr = div & 0xff;
|
|
|
|
/* disable all interrupts */
|
|
psc->psc_imr = 0;
|
|
|
|
/* reset and enable Rx/Tx */
|
|
psc->command = PSC_RST_RX;
|
|
psc->command = PSC_RST_TX;
|
|
psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
serial_putc(const char c)
|
|
{
|
|
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
|
|
|
|
if (c == '\n')
|
|
serial_putc('\r');
|
|
|
|
/* Wait for last character to go. */
|
|
while (!(psc->psc_status & PSC_SR_TXEMP))
|
|
;
|
|
|
|
psc->psc_buffer_8 = c;
|
|
}
|
|
|
|
void
|
|
serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|
|
|
|
int
|
|
serial_getc(void)
|
|
{
|
|
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
|
|
|
|
/* Wait for a character to arrive. */
|
|
while (!(psc->psc_status & PSC_SR_RXRDY))
|
|
;
|
|
|
|
return psc->psc_buffer_8;
|
|
}
|
|
|
|
int
|
|
serial_tstc(void)
|
|
{
|
|
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
|
|
|
|
return (psc->psc_status & PSC_SR_RXRDY);
|
|
}
|
|
|
|
void
|
|
serial_setbrg(void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
|
|
unsigned long baseclk, div;
|
|
|
|
#if defined(CONFIG_MGT5100)
|
|
baseclk = CFG_MPC5XXX_CLKIN / 32;
|
|
#elif defined(CONFIG_MPC5200)
|
|
baseclk = gd->ipb_clk / 32;
|
|
#endif
|
|
|
|
/* set up UART divisor */
|
|
div = baseclk / gd->baudrate;
|
|
psc->ctur = div >> 8;
|
|
psc->ctlr = div & 0xff;
|
|
}
|
|
#endif /* CONFIG_PSC_CONSOLE */
|