Linux Kernel  3.7.1
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serial.c
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1 /*
2  * BRIEF MODULE DESCRIPTION
3  * Serial port initialisation.
4  *
5  * Copyright 2004 IDT Inc. ([email protected])
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 
49 {
50  rb532_uart.uartclk = idt_cpu_freq;
51 
52  return early_serial_setup(&rb532_uart);
53 }