2 * serial.c -- KS8695 serial driver
4 * (C) Copyright 2004, Greg Ungerer <greg.ungerer@opengear.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <asm/arch/platform.h>
24 #ifndef CONFIG_SERIAL1
25 #error "Bad: you didn't configure serial ..."
29 * Define the UART hardware register access structure.
32 unsigned int RX; /* 0x00 - Receive data (r) */
33 unsigned int TX; /* 0x04 - Transmit data (w) */
34 unsigned int FCR; /* 0x08 - Fifo Control (r/w) */
35 unsigned int LCR; /* 0x0c - Line Control (r/w) */
36 unsigned int MCR; /* 0x10 - Modem Control (r/w) */
37 unsigned int LSR; /* 0x14 - Line Status (r/w) */
38 unsigned int MSR; /* 0x18 - Modem Status (r/w) */
39 unsigned int BD; /* 0x1c - Baud Rate (r/w) */
40 unsigned int SR; /* 0x20 - Status (r/w) */
43 #define KS8695_UART_ADDR ((void *) (KS8695_IO_BASE + KS8695_UART_RX_BUFFER))
44 #define KS8695_UART_CLK 25000000
48 * Under some circumstances we want to be "quiet" and not issue any
49 * serial output - though we want u-boot to otherwise work and behave
50 * the same. By default be noisy.
52 int serial_console = 1;
55 void serial_setbrg(void)
57 DECLARE_GLOBAL_DATA_PTR;
58 volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
60 /* Set to global baud rate and 8 data bits, no parity, 1 stop bit*/
61 uartp->BD = KS8695_UART_CLK / gd->baudrate;
62 uartp->LCR = KS8695_UART_LINEC_WLEN8;
72 void serial_raw_putc(const char c)
74 volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
77 for (i = 0; (i < 0x100000); i++) {
78 if (uartp->LSR & KS8695_UART_LINES_TXFE)
85 void serial_putc(const char c)
90 serial_raw_putc('\r');
96 volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
98 return ((uartp->LSR & KS8695_UART_LINES_RXFE) ? 1 : 0);
102 void serial_puts(const char *s)
105 while ((c = *s++) != 0)
109 int serial_getc(void)
111 volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
113 while ((uartp->LSR & KS8695_UART_LINES_RXFE) == 0)