projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 6790c557 JCPV |
1 | /* |
| 2 | * (C) Copyright 2002-2004 | |
| 3 | * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> | |
| 4 | * | |
| 5 | * (C) Copyright 2002 | |
| 6 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
| 7 | * Marius Groeger <mgroeger@sysgo.de> | |
| 8 | * | |
| 9 | * (C) Copyright 2002 | |
| 10 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
| 11 | * Alex Zuepke <azu@sysgo.de> | |
| 12 | * | |
| 13 | * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) | |
| 14 | * | |
| 15 | * This program is free software; you can redistribute it and/or modify | |
| 16 | * it under the terms of the GNU General Public License as published by | |
| 17 | * the Free Software Foundation; either version 2 of the License, or | |
| 18 | * (at your option) any later version. | |
| 19 | * | |
| 20 | * This program is distributed in the hope that it will be useful, | |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 23 | * GNU General Public License for more details. | |
| 24 | * | |
| 25 | * You should have received a copy of the GNU General Public License | |
| 26 | * along with this program; if not, write to the Free Software | |
| 27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 28 | * | |
| 29 | */ | |
| 30 | ||
| 31 | #include <common.h> | |
| 32 | #include <asm/arch/hardware.h> | |
| 33 | ||
| 34 | DECLARE_GLOBAL_DATA_PTR; | |
| 35 | ||
| 36 | void serial_setbrg (void) | |
| 37 | { | |
| 38 | unsigned short divisor = 0; | |
| 39 | ||
| 40 | switch (gd->baudrate) { | |
| 41 | case 1200: divisor = 3072; break; | |
| 42 | case 9600: divisor = 384; break; | |
| 43 | case 19200: divisor = 192; break; | |
| 44 | case 38400: divisor = 96; break; | |
| 45 | case 57600: divisor = 64; break; | |
| 46 | case 115200: divisor = 32; break; | |
| 47 | default: hang (); break; | |
| 48 | } | |
| 49 | ||
| 50 | /* init serial UART0 */ | |
| 51 | PUT8(U0LCR, 0); | |
| 52 | PUT8(U0IER, 0); | |
| 53 | PUT8(U0LCR, 0x80); /* DLAB=1 */ | |
| 54 | PUT8(U0DLL, (unsigned char)(divisor & 0x00FF)); | |
| 55 | PUT8(U0DLM, (unsigned char)(divisor >> 8)); | |
| 56 | PUT8(U0LCR, 0x03); /* 8N1, DLAB=0 */ | |
| 57 | PUT8(U0FCR, 1); /* Enable RX and TX FIFOs */ | |
| 58 | } | |
| 59 | ||
| 60 | int serial_init (void) | |
| 61 | { | |
| 62 | unsigned long pinsel0; | |
| 63 | ||
| 64 | serial_setbrg (); | |
| 65 | ||
| 66 | pinsel0 = GET32(PINSEL0); | |
| 67 | pinsel0 &= ~(0x00000003); | |
| 68 | pinsel0 |= 5; | |
| 69 | PUT32(PINSEL0, pinsel0); | |
| 70 | ||
| 71 | return (0); | |
| 72 | } | |
| 73 | ||
| 74 | void serial_putc (const char c) | |
| 75 | { | |
| 76 | if (c == '\n') | |
| 77 | { | |
| 78 | while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */ | |
| 79 | PUT8(U0THR, '\r'); | |
| 80 | } | |
| 81 | ||
| 82 | while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */ | |
| 83 | PUT8(U0THR, c); | |
| 84 | } | |
| 85 | ||
| 86 | int serial_getc (void) | |
| 87 | { | |
| 88 | while((GET8(U0LSR) & 1) == 0); | |
| 89 | return GET8(U0RBR); | |
| 90 | } | |
| 91 | ||
| 92 | void | |
| 93 | serial_puts (const char *s) | |
| 94 | { | |
| 95 | while (*s) { | |
| 96 | serial_putc (*s++); | |
| 97 | } | |
| 98 | } | |
| 99 | ||
| 100 | /* Test if there is a byte to read */ | |
| 101 | int serial_tstc (void) | |
| 102 | { | |
| 103 | return (GET8(U0LSR) & 1); | |
| 104 | } |