| wdenk | 337f565 | 2004-10-28 00:09:35 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2004, Freescale, Inc |
| 3 | * TsiChung Liew, Tsi-Chung.Liew@freescale.com. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * Minimal serial functions needed to use one of the PSC ports |
| 27 | * as serial console interface. |
| 28 | */ |
| 29 | |
| 30 | #include <common.h> |
| 31 | #include <mpc8220.h> |
| 32 | |
| 33 | #if defined (CONFIG_EXTUART_CONSOLE) |
| 34 | # include <ns16550.h> |
| 35 | |
| 36 | # define PADSERIAL_BAUD_115200 0x40 |
| 37 | # define PADSERIAL_BAUD_57600 0x20 |
| 38 | # define PADSERIAL_BAUD_9600 0 |
| 39 | # define PADCARD_FREQ 18432000 |
| 40 | |
| 41 | const NS16550_t com_port = (NS16550_t) CFG_NS16550_COM1; |
| 42 | |
| 43 | int ext_serial_init (void) |
| 44 | { |
| 45 | DECLARE_GLOBAL_DATA_PTR; |
| 46 | volatile u8 *dipswitch = (volatile u8 *) (CFG_CPLD_BASE + 0x1002); |
| 47 | int baud_divisor; |
| 48 | |
| 49 | /* Find out the baud rate speed on debug card dip switches */ |
| 50 | if (*dipswitch & PADSERIAL_BAUD_115200) |
| 51 | gd->baudrate = 115200; |
| 52 | else if (*dipswitch & PADSERIAL_BAUD_57600) |
| 53 | gd->baudrate = 57600; |
| 54 | else |
| 55 | gd->baudrate = 9600; |
| 56 | |
| 57 | /* Debug card frequency */ |
| 58 | baud_divisor = PADCARD_FREQ / (16 * gd->baudrate); |
| 59 | |
| 60 | NS16550_init (com_port, baud_divisor); |
| 61 | |
| 62 | return (0); |
| 63 | } |
| 64 | |
| 65 | void ext_serial_putc (const char c) |
| 66 | { |
| 67 | if (c == '\n') |
| 68 | NS16550_putc (com_port, '\r'); |
| 69 | |
| 70 | NS16550_putc (com_port, c); |
| 71 | } |
| 72 | |
| 73 | void ext_serial_puts (const char *s) |
| 74 | { |
| 75 | while (*s) { |
| 76 | serial_putc (*s++); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | int ext_serial_getc (void) |
| 81 | { |
| 82 | return NS16550_getc (com_port); |
| 83 | } |
| 84 | |
| 85 | int ext_serial_tstc (void) |
| 86 | { |
| 87 | return NS16550_tstc (com_port); |
| 88 | } |
| 89 | |
| 90 | void ext_serial_setbrg (void) |
| 91 | { |
| 92 | DECLARE_GLOBAL_DATA_PTR; |
| 93 | |
| 94 | volatile u8 *dipswitch = (volatile u8 *) (CFG_CPLD_BASE + 0x1002); |
| 95 | int baud_divisor; |
| 96 | |
| 97 | /* Find out the baud rate speed on debug card dip switches */ |
| 98 | if (*dipswitch & PADSERIAL_BAUD_115200) |
| 99 | gd->baudrate = 115200; |
| 100 | else if (*dipswitch & PADSERIAL_BAUD_57600) |
| 101 | gd->baudrate = 57600; |
| 102 | else |
| 103 | gd->baudrate = 9600; |
| 104 | |
| 105 | /* Debug card frequency */ |
| 106 | baud_divisor = PADCARD_FREQ / (16 * gd->baudrate); |
| 107 | |
| 108 | NS16550_reinit (com_port, baud_divisor); |
| 109 | } |
| 110 | #endif /* CONFIG_EXTUART_CONSOLE */ |