]>
Commit | Line | Data |
---|---|---|
2d5b561e WD |
1 | /* |
2 | * (C) Copyright 2002 | |
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/ixp425.h> | |
33 | ||
7b74ebe7 JCPV |
34 | /* |
35 | * 14.7456 MHz | |
36 | * Baud Rate = -------------- | |
37 | * 16 x Divisor | |
38 | */ | |
07eb0268 | 39 | #define SERIAL_CLOCK 921600 |
7b74ebe7 | 40 | |
d87080b7 WD |
41 | DECLARE_GLOBAL_DATA_PTR; |
42 | ||
2d5b561e WD |
43 | void serial_setbrg (void) |
44 | { | |
2d5b561e | 45 | unsigned int quot = 0; |
6d0f6bcf | 46 | int uart = CONFIG_SYS_IXP425_CONSOLE; |
07eb0268 | 47 | |
7b74ebe7 JCPV |
48 | if ((gd->baudrate <= SERIAL_CLOCK) && (SERIAL_CLOCK % gd->baudrate == 0)) |
49 | quot = SERIAL_CLOCK / gd->baudrate; | |
2d5b561e WD |
50 | else |
51 | hang (); | |
52 | ||
53 | IER(uart) = 0; /* Disable for now */ | |
54 | FCR(uart) = 0; /* No fifos enabled */ | |
55 | ||
56 | /* set baud rate */ | |
57 | LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB; | |
58 | DLL(uart) = quot & 0xff; | |
59 | DLH(uart) = quot >> 8; | |
60 | LCR(uart) = LCR_WLS0 | LCR_WLS1; | |
96bd4629 MS |
61 | #ifdef CONFIG_SERIAL_RTS_ACTIVE |
62 | MCR(uart) = MCR_RTS; /* set RTS active */ | |
63 | #else | |
64 | MCR(uart) = 0; /* set RTS inactive */ | |
65 | #endif | |
2d5b561e WD |
66 | IER(uart) = IER_UUE; |
67 | } | |
68 | ||
2d5b561e WD |
69 | /* |
70 | * Initialise the serial port with the given baudrate. The settings | |
71 | * are always 8 data bits, no parity, 1 stop bit, no start bits. | |
72 | * | |
73 | */ | |
74 | int serial_init (void) | |
75 | { | |
76 | serial_setbrg (); | |
77 | ||
78 | return (0); | |
79 | } | |
80 | ||
81 | ||
82 | /* | |
83 | * Output a single byte to the serial port. | |
84 | */ | |
85 | void serial_putc (const char c) | |
86 | { | |
87 | /* wait for room in the tx FIFO on UART */ | |
6d0f6bcf | 88 | while ((LSR(CONFIG_SYS_IXP425_CONSOLE) & LSR_TEMT) == 0); |
2d5b561e | 89 | |
6d0f6bcf | 90 | THR(CONFIG_SYS_IXP425_CONSOLE) = c; |
2d5b561e WD |
91 | |
92 | /* If \n, also do \r */ | |
93 | if (c == '\n') | |
94 | serial_putc ('\r'); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Read a single byte from the serial port. Returns 1 on success, 0 | |
99 | * otherwise. When the function is succesfull, the character read is | |
100 | * written into its argument c. | |
101 | */ | |
102 | int serial_tstc (void) | |
103 | { | |
6d0f6bcf | 104 | return LSR(CONFIG_SYS_IXP425_CONSOLE) & LSR_DR; |
2d5b561e WD |
105 | } |
106 | ||
107 | /* | |
108 | * Read a single byte from the serial port. Returns 1 on success, 0 | |
109 | * otherwise. When the function is succesfull, the character read is | |
110 | * written into its argument c. | |
111 | */ | |
112 | int serial_getc (void) | |
113 | { | |
6d0f6bcf | 114 | while (!(LSR(CONFIG_SYS_IXP425_CONSOLE) & LSR_DR)); |
2d5b561e | 115 | |
6d0f6bcf | 116 | return (char) RBR(CONFIG_SYS_IXP425_CONSOLE) & 0xff; |
2d5b561e WD |
117 | } |
118 | ||
119 | void | |
120 | serial_puts (const char *s) | |
121 | { | |
122 | while (*s) { | |
123 | serial_putc (*s++); | |
124 | } | |
125 | } |