/* * Serial Port stuff - taken from Linux * * (C) Copyright 2002 * MAZeT GmbH <www.mazet.de> * Stephan Linz <linz@mazet.de>, <linz@li-pro.net> * * (c) 2004 * IMMS gGmbH <www.imms.de> * Thomas Elste <info@elste.org> * * 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 * */#include <common.h>#ifdef CONFIG_NETARM#include <asm/hardware.h>DECLARE_GLOBAL_DATA_PTR;#define PORTA	(*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_PORTA))#if !defined(CONFIG_NETARM_NS7520)#define PORTB	(*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_PORTB))#else#define PORTC	(*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_PORTC))#endif/* wait until transmitter is ready for another character */#define TXWAITRDY(registers) 							\{										\	ulong tmo = get_timer(0) + 1 * CFG_HZ;					\	while (((registers)->status_a & NETARM_SER_STATA_TX_RDY) == 0 )	{	\		if (get_timer(0) > tmo)						\			break;							\	}									\}#ifndef CONFIG_UART1_CONSOLEvolatile netarm_serial_channel_t *serial_reg_ch1 = get_serial_channel(0);volatile netarm_serial_channel_t *serial_reg_ch2 = get_serial_channel(1);#elsevolatile netarm_serial_channel_t *serial_reg_ch1 = get_serial_channel(1);volatile netarm_serial_channel_t *serial_reg_ch2 = get_serial_channel(0);#endifextern void _netarm_led_FAIL1(void);/* * Setup both serial i/f with given baudrate */void serial_setbrg (void){	/* set 0 ... make sure pins are configured for serial */#if !defined(CONFIG_NETARM_NS7520)	PORTA = PORTB =		NETARM_GEN_PORT_MODE (0xef) | NETARM_GEN_PORT_DIR (0xe0);#else	PORTA = NETARM_GEN_PORT_MODE (0xef) | NETARM_GEN_PORT_DIR (0xe0);	PORTC = NETARM_GEN_PORT_CSF (0xef) | NETARM_GEN_PORT_MODE (0xef) | NETARM_GEN_PORT_DIR (0xe0);#endif	/* first turn em off */	serial_reg_ch1->ctrl_a = serial_reg_ch2->ctrl_a = 0;	/* clear match register, we don't need it */	serial_reg_ch1->rx_match = serial_reg_ch2->rx_match = 0;	/* setup bit rate generator and rx buffer gap timer (1 byte only) */	if ((gd->baudrate >= MIN_BAUD_RATE)	    && (gd->baudrate <= MAX_BAUD_RATE)) {		serial_reg_ch1->bitrate = serial_reg_ch2->bitrate =			NETARM_SER_BR_X16 (gd->baudrate);		serial_reg_ch1->rx_buf_timer = serial_reg_ch2->rx_buf_timer =			0;		serial_reg_ch1->rx_char_timer = serial_reg_ch2->rx_char_timer =			NETARM_SER_RXGAP (gd->baudrate);	} else {		hang ();	}	/* setup port mode */	serial_reg_ch1->ctrl_b = serial_reg_ch2->ctrl_b =		( NETARM_SER_CTLB_RCGT_EN |		  NETARM_SER_CTLB_UART_MODE);	serial_reg_ch1->ctrl_a = serial_reg_ch2->ctrl_a =		( NETARM_SER_CTLA_ENABLE |		  NETARM_SER_CTLA_P_NONE |		  /* see errata */		  NETARM_SER_CTLA_2STOP |		  NETARM_SER_CTLA_8BITS |		  NETARM_SER_CTLA_DTR_EN |		  NETARM_SER_CTLA_RTS_EN);}/* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. */int serial_init (void){	serial_setbrg ();	return 0;}/* * Output a single byte to the serial port. */void serial_putc (const char c){	volatile unsigned char *fifo;	/* If \n, also do \r */	if (c == '\n')		serial_putc ('\r');	fifo = (volatile unsigned char *) &(serial_reg_ch1->fifo);	TXWAITRDY (serial_reg_ch1);	*fifo = c;}/* * Test of a single byte from the serial port. Returns 1 on success, 0 * otherwise. */int serial_tstc(void){	return serial_reg_ch1->status_a & NETARM_SER_STATA_RX_RDY;}/* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. */int serial_getc (void){	unsigned int ch_uint;	volatile unsigned int *fifo;	volatile unsigned char *fifo_char = NULL;	int buf_count = 0;	while (!(serial_reg_ch1->status_a & NETARM_SER_STATA_RX_RDY))		/* NOP */ ;	fifo = (volatile unsigned int *) &(serial_reg_ch1->fifo);	fifo_char = (unsigned char *) &ch_uint;	ch_uint = *fifo;	buf_count = NETARM_SER_STATA_RXFDB (serial_reg_ch1->status_a);	switch (buf_count) {	case NETARM_SER_STATA_RXFDB_4BYTES:		buf_count = 4;		break;	case NETARM_SER_STATA_RXFDB_3BYTES:		buf_count = 3;		break;	case NETARM_SER_STATA_RXFDB_2BYTES:		buf_count = 2;		break;	case NETARM_SER_STATA_RXFDB_1BYTES:		buf_count = 1;		break;	default:		/* panic, be never here */		break;	}	serial_reg_ch1->status_a |= NETARM_SER_STATA_RX_CLOSED;	return ch_uint & 0xff;}void serial_puts (const char *s){	while (*s) {		serial_putc (*s++);	}}#endif /* CONFIG_NETARM */