389 lines
7.4 KiB
C
389 lines
7.4 KiB
C
|
/*
|
||
|
* (C) Copyright 2002
|
||
|
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
|
||
|
*
|
||
|
* (C) Copyright 2002
|
||
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
||
|
* Marius Groeger <mgroeger@sysgo.de>
|
||
|
*
|
||
|
* (C) Copyright 2002
|
||
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
||
|
* Alex Zuepke <azu@sysgo.de>
|
||
|
*
|
||
|
* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
|
||
|
*
|
||
|
* 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
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
#include <common.h>
|
||
|
#include <watchdog.h>
|
||
|
#include <serial.h>
|
||
|
#include <asm/arch/pxa-regs.h>
|
||
|
|
||
|
DECLARE_GLOBAL_DATA_PTR;
|
||
|
|
||
|
#define FFUART_INDEX 0
|
||
|
#define BTUART_INDEX 1
|
||
|
#define STUART_INDEX 2
|
||
|
|
||
|
#ifndef CONFIG_SERIAL_MULTI
|
||
|
#if defined (CONFIG_FFUART)
|
||
|
#define UART_INDEX FFUART_INDEX
|
||
|
#elif defined (CONFIG_BTUART)
|
||
|
#define UART_INDEX BTUART_INDEX
|
||
|
#elif defined (CONFIG_STUART)
|
||
|
#define UART_INDEX STUART_INDEX
|
||
|
#else
|
||
|
#error "Bad: you didn't configure serial ..."
|
||
|
#endif
|
||
|
#endif
|
||
|
|
||
|
void pxa_setbrg_dev (unsigned int uart_index)
|
||
|
{
|
||
|
unsigned int quot = 0;
|
||
|
|
||
|
if (gd->baudrate == 1200)
|
||
|
quot = 768;
|
||
|
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
|
||
|
hang ();
|
||
|
|
||
|
switch (uart_index) {
|
||
|
case FFUART_INDEX:
|
||
|
#ifdef CONFIG_CPU_MONAHANS
|
||
|
CKENA |= CKENA_22_FFUART;
|
||
|
#else
|
||
|
CKEN |= CKEN6_FFUART;
|
||
|
#endif /* CONFIG_CPU_MONAHANS */
|
||
|
|
||
|
FFIER = 0; /* Disable for now */
|
||
|
FFFCR = 0; /* No fifos enabled */
|
||
|
|
||
|
/* set baud rate */
|
||
|
FFLCR = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
|
||
|
FFDLL = quot & 0xff;
|
||
|
FFDLH = quot >> 8;
|
||
|
FFLCR = LCR_WLS0 | LCR_WLS1;
|
||
|
|
||
|
FFIER = IER_UUE; /* Enable FFUART */
|
||
|
break;
|
||
|
|
||
|
case BTUART_INDEX:
|
||
|
#ifdef CONFIG_CPU_MONAHANS
|
||
|
CKENA |= CKENA_21_BTUART;
|
||
|
#else
|
||
|
CKEN |= CKEN7_BTUART;
|
||
|
#endif /* CONFIG_CPU_MONAHANS */
|
||
|
|
||
|
BTIER = 0;
|
||
|
BTFCR = 0;
|
||
|
|
||
|
/* set baud rate */
|
||
|
BTLCR = LCR_DLAB;
|
||
|
BTDLL = quot & 0xff;
|
||
|
BTDLH = quot >> 8;
|
||
|
BTLCR = LCR_WLS0 | LCR_WLS1;
|
||
|
|
||
|
BTIER = IER_UUE; /* Enable BFUART */
|
||
|
|
||
|
break;
|
||
|
|
||
|
case STUART_INDEX:
|
||
|
#ifdef CONFIG_CPU_MONAHANS
|
||
|
CKENA |= CKENA_23_STUART;
|
||
|
#else
|
||
|
CKEN |= CKEN5_STUART;
|
||
|
#endif /* CONFIG_CPU_MONAHANS */
|
||
|
|
||
|
STIER = 0;
|
||
|
STFCR = 0;
|
||
|
|
||
|
/* set baud rate */
|
||
|
STLCR = LCR_DLAB;
|
||
|
STDLL = quot & 0xff;
|
||
|
STDLH = quot >> 8;
|
||
|
STLCR = LCR_WLS0 | LCR_WLS1;
|
||
|
|
||
|
STIER = IER_UUE; /* Enable STUART */
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
hang();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Initialise the serial port with the given baudrate. The settings
|
||
|
* are always 8 data bits, no parity, 1 stop bit, no start bits.
|
||
|
*
|
||
|
*/
|
||
|
int pxa_init_dev (unsigned int uart_index)
|
||
|
{
|
||
|
pxa_setbrg_dev (uart_index);
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Output a single byte to the serial port.
|
||
|
*/
|
||
|
void pxa_putc_dev (unsigned int uart_index,const char c)
|
||
|
{
|
||
|
switch (uart_index) {
|
||
|
case FFUART_INDEX:
|
||
|
/* wait for room in the tx FIFO on FFUART */
|
||
|
while ((FFLSR & LSR_TEMT) == 0)
|
||
|
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
|
||
|
FFTHR = c;
|
||
|
break;
|
||
|
|
||
|
case BTUART_INDEX:
|
||
|
while ((BTLSR & LSR_TEMT ) == 0 )
|
||
|
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
|
||
|
BTTHR = c;
|
||
|
break;
|
||
|
|
||
|
case STUART_INDEX:
|
||
|
while ((STLSR & LSR_TEMT ) == 0 )
|
||
|
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
|
||
|
STTHR = c;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
/* If \n, also do \r */
|
||
|
if (c == '\n')
|
||
|
pxa_putc_dev (uart_index,'\r');
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Read a single byte from the serial port. Returns 1 on success, 0
|
||
|
* otherwise. When the function is succesfull, the character read is
|
||
|
* written into its argument c.
|
||
|
*/
|
||
|
int pxa_tstc_dev (unsigned int uart_index)
|
||
|
{
|
||
|
switch (uart_index) {
|
||
|
case FFUART_INDEX:
|
||
|
return FFLSR & LSR_DR;
|
||
|
case BTUART_INDEX:
|
||
|
return BTLSR & LSR_DR;
|
||
|
case STUART_INDEX:
|
||
|
return STLSR & LSR_DR;
|
||
|
}
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Read a single byte from the serial port. Returns 1 on success, 0
|
||
|
* otherwise. When the function is succesfull, the character read is
|
||
|
* written into its argument c.
|
||
|
*/
|
||
|
int pxa_getc_dev (unsigned int uart_index)
|
||
|
{
|
||
|
switch (uart_index) {
|
||
|
case FFUART_INDEX:
|
||
|
while (!(FFLSR & LSR_DR))
|
||
|
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
|
||
|
return (char) FFRBR & 0xff;
|
||
|
|
||
|
case BTUART_INDEX:
|
||
|
while (!(BTLSR & LSR_DR))
|
||
|
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
|
||
|
return (char) BTRBR & 0xff;
|
||
|
case STUART_INDEX:
|
||
|
while (!(STLSR & LSR_DR))
|
||
|
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
|
||
|
return (char) STRBR & 0xff;
|
||
|
}
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
pxa_puts_dev (unsigned int uart_index,const char *s)
|
||
|
{
|
||
|
while (*s) {
|
||
|
pxa_putc_dev (uart_index,*s++);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#if defined (CONFIG_FFUART)
|
||
|
static int ffuart_init(void)
|
||
|
{
|
||
|
return pxa_init_dev(FFUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static void ffuart_setbrg(void)
|
||
|
{
|
||
|
return pxa_setbrg_dev(FFUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static void ffuart_putc(const char c)
|
||
|
{
|
||
|
return pxa_putc_dev(FFUART_INDEX,c);
|
||
|
}
|
||
|
|
||
|
static void ffuart_puts(const char *s)
|
||
|
{
|
||
|
return pxa_puts_dev(FFUART_INDEX,s);
|
||
|
}
|
||
|
|
||
|
static int ffuart_getc(void)
|
||
|
{
|
||
|
return pxa_getc_dev(FFUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static int ffuart_tstc(void)
|
||
|
{
|
||
|
return pxa_tstc_dev(FFUART_INDEX);
|
||
|
}
|
||
|
|
||
|
struct serial_device serial_ffuart_device =
|
||
|
{
|
||
|
"serial_ffuart",
|
||
|
"PXA",
|
||
|
ffuart_init,
|
||
|
NULL,
|
||
|
ffuart_setbrg,
|
||
|
ffuart_getc,
|
||
|
ffuart_tstc,
|
||
|
ffuart_putc,
|
||
|
ffuart_puts,
|
||
|
};
|
||
|
#endif
|
||
|
|
||
|
#if defined (CONFIG_BTUART)
|
||
|
static int btuart_init(void)
|
||
|
{
|
||
|
return pxa_init_dev(BTUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static void btuart_setbrg(void)
|
||
|
{
|
||
|
return pxa_setbrg_dev(BTUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static void btuart_putc(const char c)
|
||
|
{
|
||
|
return pxa_putc_dev(BTUART_INDEX,c);
|
||
|
}
|
||
|
|
||
|
static void btuart_puts(const char *s)
|
||
|
{
|
||
|
return pxa_puts_dev(BTUART_INDEX,s);
|
||
|
}
|
||
|
|
||
|
static int btuart_getc(void)
|
||
|
{
|
||
|
return pxa_getc_dev(BTUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static int btuart_tstc(void)
|
||
|
{
|
||
|
return pxa_tstc_dev(BTUART_INDEX);
|
||
|
}
|
||
|
|
||
|
struct serial_device serial_btuart_device =
|
||
|
{
|
||
|
"serial_btuart",
|
||
|
"PXA",
|
||
|
btuart_init,
|
||
|
NULL,
|
||
|
btuart_setbrg,
|
||
|
btuart_getc,
|
||
|
btuart_tstc,
|
||
|
btuart_putc,
|
||
|
btuart_puts,
|
||
|
};
|
||
|
#endif
|
||
|
|
||
|
#if defined (CONFIG_STUART)
|
||
|
static int stuart_init(void)
|
||
|
{
|
||
|
return pxa_init_dev(STUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static void stuart_setbrg(void)
|
||
|
{
|
||
|
return pxa_setbrg_dev(STUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static void stuart_putc(const char c)
|
||
|
{
|
||
|
return pxa_putc_dev(STUART_INDEX,c);
|
||
|
}
|
||
|
|
||
|
static void stuart_puts(const char *s)
|
||
|
{
|
||
|
return pxa_puts_dev(STUART_INDEX,s);
|
||
|
}
|
||
|
|
||
|
static int stuart_getc(void)
|
||
|
{
|
||
|
return pxa_getc_dev(STUART_INDEX);
|
||
|
}
|
||
|
|
||
|
static int stuart_tstc(void)
|
||
|
{
|
||
|
return pxa_tstc_dev(STUART_INDEX);
|
||
|
}
|
||
|
|
||
|
struct serial_device serial_stuart_device =
|
||
|
{
|
||
|
"serial_stuart",
|
||
|
"PXA",
|
||
|
stuart_init,
|
||
|
NULL,
|
||
|
stuart_setbrg,
|
||
|
stuart_getc,
|
||
|
stuart_tstc,
|
||
|
stuart_putc,
|
||
|
stuart_puts,
|
||
|
};
|
||
|
#endif
|
||
|
|
||
|
|
||
|
#ifndef CONFIG_SERIAL_MULTI
|
||
|
inline int serial_init(void) {
|
||
|
return (pxa_init_dev(UART_INDEX));
|
||
|
}
|
||
|
void serial_setbrg(void) {
|
||
|
pxa_setbrg_dev(UART_INDEX);
|
||
|
}
|
||
|
int serial_getc(void) {
|
||
|
return(pxa_getc_dev(UART_INDEX));
|
||
|
}
|
||
|
int serial_tstc(void) {
|
||
|
return(pxa_tstc_dev(UART_INDEX));
|
||
|
}
|
||
|
void serial_putc(const char c) {
|
||
|
pxa_putc_dev(UART_INDEX,c);
|
||
|
}
|
||
|
void serial_puts(const char *s) {
|
||
|
pxa_puts_dev(UART_INDEX,s);
|
||
|
}
|
||
|
#endif /* CONFIG_SERIAL_MULTI */
|