arch/mips/alchemy/mtx-1/board_setup.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      4G Systems MTX-1 board setup.
   5  *
   6  * Copyright 2003, 2008 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc. <source@mvista.com>
   8  *         Bruno Randolf <bruno.randolf@4g-systems.biz>
   9  *
  10  *  This program is free software; you can redistribute  it and/or modify it
  11  *  under  the terms of  the GNU General  Public License as published by the
  12  *  Free Software Foundation;  either version 2 of the  License, or (at your
  13  *  option) any later version.
  14  *
  15  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  16  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  17  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  18  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  19  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  21  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  22  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  23  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  *  You should have received a copy of the  GNU General Public License along
  27  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  28  *  675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/gpio.h>
  32 #include <linux/init.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/pm.h>
  35
  36 #include <asm/reboot.h>
  37 #include <asm/mach-au1x00/au1000.h>
  38
  39 #include <prom.h>
  40
  41 static void mtx1_reset(char *c)
  42 {
  43         /* Jump to the reset vector */
  44         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  45 }
  46
  47 static void mtx1_power_off(void)
  48 {
  49         while (1)
  50                 asm volatile (
  51                 "       .set    mips32                                  \n"
  52                 "       wait                                            \n"
  53                 "       .set    mips0                                   \n");
  54 }
  55
  56 void __init board_setup(void)
  57 {
  58 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
  59         /* Enable USB power switch */
  60         alchemy_gpio_direction_output(204, 0);
  61 #endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */
  62
  63         /* Initialize sys_pinfunc */
  64         au_writel(SYS_PF_NI2, SYS_PINFUNC);
  65
  66         /* Initialize GPIO */
  67         au_writel(~0, KSEG1ADDR(AU1000_SYS_PHYS_ADDR) + SYS_TRIOUTCLR);
  68         alchemy_gpio_direction_output(0, 0);    /* Disable M66EN (PCI 66MHz) */
  69         alchemy_gpio_direction_output(3, 1);    /* Disable PCI CLKRUN# */
  70         alchemy_gpio_direction_output(1, 1);    /* Enable EXT_IO3 */
  71         alchemy_gpio_direction_output(5, 0);    /* Disable eth PHY TX_ER */
  72
  73         /* Enable LED and set it to green */
  74         alchemy_gpio_direction_output(211, 1);  /* green on */
  75         alchemy_gpio_direction_output(212, 0);  /* red off */
  76
  77         pm_power_off = mtx1_power_off;
  78         _machine_halt = mtx1_power_off;
  79         _machine_restart = mtx1_reset;
  80
  81         printk(KERN_INFO "4G Systems MTX-1 Board\n");
  82 }
  83
  84 static int __init mtx1_init_irq(void)
  85 {
  86         irq_set_irq_type(AU1500_GPIO204_INT, IRQF_TRIGGER_HIGH);
  87         irq_set_irq_type(AU1500_GPIO201_INT, IRQF_TRIGGER_LOW);
  88         irq_set_irq_type(AU1500_GPIO202_INT, IRQF_TRIGGER_LOW);
  89         irq_set_irq_type(AU1500_GPIO203_INT, IRQF_TRIGGER_LOW);
  90         irq_set_irq_type(AU1500_GPIO205_INT, IRQF_TRIGGER_LOW);
  91
  92         return 0;
  93 }
  94 arch_initcall(mtx1_init_irq);