/* * serial.c -- KS8695 serial driver * * (C) Copyright 2004, Greg Ungerer <greg.ungerer@opengear.com> * * 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 <asm/arch/platform.h>#ifndef CONFIG_SERIAL1#error "Bad: you didn't configure serial ..."#endif/* *	Define the UART hardware register access structure. */struct ks8695uart {	unsigned int	RX;		/* 0x00	- Receive data (r) */	unsigned int	TX;		/* 0x04	- Transmit data (w) */	unsigned int	FCR;		/* 0x08	- Fifo Control (r/w) */	unsigned int	LCR;		/* 0x0c	- Line Control (r/w) */	unsigned int	MCR;		/* 0x10	- Modem Control (r/w) */	unsigned int	LSR;		/* 0x14	- Line Status (r/w) */	unsigned int	MSR;		/* 0x18	- Modem Status (r/w) */	unsigned int	BD;		/* 0x1c	- Baud Rate (r/w) */	unsigned int	SR;		/* 0x20	- Status (r/w) */};#define	KS8695_UART_ADDR	((void *) (KS8695_IO_BASE + KS8695_UART_RX_BUFFER))#define	KS8695_UART_CLK		25000000/* * Under some circumstances we want to be "quiet" and not issue any * serial output - though we want u-boot to otherwise work and behave * the same. By default be noisy. */int serial_console = 1;void serial_setbrg(void){	DECLARE_GLOBAL_DATA_PTR;	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;	/* Set to global baud rate and 8 data bits, no parity, 1 stop bit*/	uartp->BD = KS8695_UART_CLK / gd->baudrate;	uartp->LCR = KS8695_UART_LINEC_WLEN8;}int serial_init(void){	serial_console = 1;	serial_setbrg();	return 0;}void serial_raw_putc(const char c){	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;	int i;	for (i = 0; (i < 0x100000); i++) {		if (uartp->LSR & KS8695_UART_LINES_TXFE)			break;	}	uartp->TX = c;}void serial_putc(const char c){	if (serial_console) {		serial_raw_putc(c);		if (c == '\n')			serial_raw_putc('\r');	}}int serial_tstc(void){	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;	if (serial_console)		return ((uartp->LSR & KS8695_UART_LINES_RXFE) ? 1 : 0);	return 0;}void serial_puts(const char *s){	char c;	while ((c = *s++) != 0)		serial_putc(c);}int serial_getc(void){	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;	while ((uartp->LSR & KS8695_UART_LINES_RXFE) == 0)		;	return (uartp->RX);}