1 /*
2  *  BRIEF MODULE DESCRIPTION
3  *     Serial port initialisation.
4  *
5  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
6  *
7  *  This program is free software; you can redistribute  it and/or modify it
8  *  under  the terms of  the GNU General  Public License as published by the
9  *  Free Software Foundation;  either version 2 of the  License, or (at your
10  *  option) any later version.
11  *
12  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
13  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
14  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
15  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
16  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
17  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
18  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
20  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22  *
23  *  You should have received a copy of the  GNU General Public License along
24  *  with this program; if not, write  to the Free Software Foundation, Inc.,
25  *  675 Mass Ave, Cambridge, MA 02139, USA.
26  */
27 
28 #include <linux/init.h>
29 #include <linux/tty.h>
30 #include <linux/serial_core.h>
31 #include <linux/serial_8250.h>
32 #include <linux/irq.h>
33 
34 #include <asm/serial.h>
35 #include <asm/mach-rc32434/rb.h>
36 
37 extern unsigned int idt_cpu_freq;
38 
39 static struct uart_port rb532_uart = {
40 	.flags = UPF_BOOT_AUTOCONF,
41 	.line = 0,
42 	.irq = UART0_IRQ,
43 	.iotype = UPIO_MEM,
44 	.membase = (char *)KSEG1ADDR(REGBASE + UART0BASE),
45 	.regshift = 2
46 };
47 
setup_serial_port(void)48 int __init setup_serial_port(void)
49 {
50 	rb532_uart.uartclk = idt_cpu_freq;
51 
52 	return early_serial_setup(&rb532_uart);
53 }
54 arch_initcall(setup_serial_port);
55