projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 983fda83 WD |
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 */ |