3 * Lineo, Inc <www.lineo.com>
4 * Bernhard Kuhn <bkuhn@lineo.com>
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
11 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
12 * Alex Zuepke <azu@sysgo.de>
14 * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #include <AT91RM9200.h>
36 AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU;
38 void serial_setbrg(void)
40 DECLARE_GLOBAL_DATA_PTR;
43 if ((baudrate = gd->bd->bi_baudrate) <= 0)
44 baudrate = CONFIG_BAUDRATE;
45 us->US_BRGR = 33 /* AT91C_MASTER_CLOCK / baudrate / 16 */; /* hardcode so no __divsi3 */
50 /* make any port initializations specific to this port */
51 *AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD; /* PA 31 & 30 */
52 *AT91C_PMC_PCER = 1 << AT91C_ID_SYS; /* enable clock */
55 us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;
56 us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
57 us->US_MR = ( AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS | AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT );
62 void serial_putc(const char c)
66 while( (us->US_CSR & AT91C_US_TXRDY) == 0 )
72 serial_puts (const char *s)
82 while( (us->US_CSR & AT91C_US_RXRDY) == 0 );
88 return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY);