target/linux/aruba-2.6/files/arch/mips/aruba/serial.c

   1 /**************************************************************************
   2  *
   3  *  BRIEF MODULE DESCRIPTION
   4  *     Serial port initialisation.
   5  *
   6  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  *
  29  **************************************************************************
  30  * May 2004 rkt, neb
  31  *
  32  * Initial Release
  33  *
  34  *
  35  *
  36  **************************************************************************
  37  */
  38
  39
  40 #include <linux/autoconf.h>
  41 #include <linux/init.h>
  42 #include <linux/sched.h>
  43 #include <linux/pci.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/tty.h>
  46 #include <linux/serial.h>
  47 #include <linux/serial_core.h>
  48
  49 #include <asm/time.h>
  50 #include <asm/cpu.h>
  51 #include <asm/bootinfo.h>
  52 #include <asm/irq.h>
  53 #include <asm/serial.h>
  54
  55 #include <asm/idt-boards/rc32434/rc32434.h>
  56
  57 extern int __init early_serial_setup(struct uart_port *port);
  58
  59 #define BASE_BAUD (1843200 / 16)
  60
  61 extern unsigned int idt_cpu_freq;
  62
  63 extern int __init setup_serial_port(void)
  64 {
  65         static struct uart_port serial_req[2];
  66
  67         memset(serial_req, 0, sizeof(serial_req));
  68         serial_req[0].type       = PORT_16550A;
  69         serial_req[0].line       = 0;
  70         serial_req[0].flags      = STD_COM_FLAGS;
  71         serial_req[0].iotype     = SERIAL_IO_MEM;
  72         serial_req[0].regshift   = 2;
  73
  74         switch (mips_machtype) {
  75                 case MACH_ARUBA_AP70:
  76                         serial_req[0].irq        = 104;
  77                         serial_req[0].mapbase    = KSEG1ADDR(0x18058003);
  78                         serial_req[0].membase    = (char *) KSEG1ADDR(0x18058003);
  79                         serial_req[0].uartclk    = idt_cpu_freq;
  80                         break;
  81                 case MACH_ARUBA_AP65:
  82                 case MACH_ARUBA_AP60:
  83                 default:
  84                         serial_req[0].irq        = 12;
  85                         serial_req[0].mapbase    = KSEG1ADDR(0xbc000003);
  86                         serial_req[0].membase    = (char *) KSEG1ADDR(0xbc000003);
  87                         serial_req[0].uartclk    = idt_cpu_freq / 2;
  88                         break;
  89         }
  90
  91         early_serial_setup(&serial_req[0]);
  92
  93         return(0);
  94 }