mips/rb532/serial.c

0001 /*
0002  *  BRIEF MODULE DESCRIPTION
0003  *     Serial port initialisation.
0004  *
0005  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
0006  *
0007  *  This program is free software; you can redistribute  it and/or modify it
0008  *  under  the terms of  the GNU General  Public License as published by the
0009  *  Free Software Foundation;  either version 2 of the  License, or (at your
0010  *  option) any later version.
0011  *
0012  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
0013  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
0014  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
0015  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
0016  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
0017  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
0018  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
0019  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
0020  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
0021  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0022  *
0023  *  You should have received a copy of the  GNU General Public License along
0024  *  with this program; if not, write  to the Free Software Foundation, Inc.,
0025  *  675 Mass Ave, Cambridge, MA 02139, USA.
0026  */
0027
0028 #include <linux/init.h>
0029 #include <linux/tty.h>
0030 #include <linux/serial_core.h>
0031 #include <linux/serial_8250.h>
0032 #include <linux/irq.h>
0033
0034 #include <asm/serial.h>
0035 #include <asm/mach-rc32434/rb.h>
0036
0037 extern unsigned int idt_cpu_freq;
0038
0039 static struct uart_port rb532_uart = {
0040     .flags = UPF_BOOT_AUTOCONF,
0041     .line = 0,
0042     .irq = UART0_IRQ,
0043     .iotype = UPIO_MEM,
0044     .membase = (char *)KSEG1ADDR(REGBASE + UART0BASE),
0045     .regshift = 2
0046 };
0047
0048 int __init setup_serial_port(void)
0049 {
0050     rb532_uart.uartclk = idt_cpu_freq;
0051
0052     return early_serial_setup(&rb532_uart);
0053 }
0054 arch_initcall(setup_serial_port);