wdenk | dc7c9a1 | 2003-03-26 06:55:25 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
| 3 | * Lineo, Inc <www.lineo.com> |
| 4 | * Bernhard Kuhn <bkuhn@lineo.com> |
| 5 | * |
| 6 | * (C) Copyright 2002 |
| 7 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| 8 | * Marius Groeger <mgroeger@sysgo.de> |
| 9 | * |
| 10 | * (C) Copyright 2002 |
| 11 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| 12 | * Alex Zuepke <azu@sysgo.de> |
| 13 | * |
| 14 | * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) |
| 15 | * |
| 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. |
| 20 | * |
| 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. |
| 25 | * |
| 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 |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include <common.h> |
wdenk | 85ec0bc | 2003-03-31 16:34:49 +0000 | [diff] [blame^] | 33 | #include <asm/io.h> |
wdenk | dc7c9a1 | 2003-03-26 06:55:25 +0000 | [diff] [blame] | 34 | |
| 35 | /* ggi thunder */ |
| 36 | AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU; |
| 37 | |
| 38 | void serial_setbrg(void) |
| 39 | { |
| 40 | DECLARE_GLOBAL_DATA_PTR; |
| 41 | int baudrate; |
| 42 | |
| 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 */ |
| 46 | } |
| 47 | |
| 48 | int serial_init(void) |
| 49 | { |
| 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 */ |
| 53 | serial_setbrg(); |
| 54 | |
| 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 ); |
| 58 | us->US_IMR = ~0ul; |
| 59 | return (0); |
| 60 | } |
| 61 | |
| 62 | void serial_putc(const char c) |
| 63 | { |
| 64 | if (c == '\n') |
| 65 | serial_putc('\r'); |
| 66 | while( (us->US_CSR & AT91C_US_TXRDY) == 0 ) |
| 67 | ; |
| 68 | us->US_THR=c; |
| 69 | } |
| 70 | |
| 71 | void |
| 72 | serial_puts (const char *s) |
| 73 | { |
| 74 | while (*s) |
| 75 | { |
| 76 | serial_putc (*s++); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | int serial_getc(void) |
| 81 | { |
| 82 | while( (us->US_CSR & AT91C_US_RXRDY) == 0 ); |
| 83 | return us->US_RHR; |
| 84 | } |
| 85 | |
| 86 | int serial_tstc(void) |
| 87 | { |
| 88 | return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY); |
| 89 | } |