arch/mips/alchemy/xxs1500/board_setup.c

   1 /*
   2  * Copyright 2000-2003, 2008 MontaVista Software Inc.
   3  * Author: MontaVista Software, Inc. <source@mvista.com>
   4  *
   5  *  This program is free software; you can redistribute  it and/or modify it
   6  *  under  the terms of  the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the  License, or (at your
   8  *  option) any later version.
   9  *
  10  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  11  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  12  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  13  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  14  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  15  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  16  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  17  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  18  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  19  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  20  *
  21  *  You should have received a copy of the  GNU General Public License along
  22  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  23  *  675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/gpio.h>
  27 #include <linux/init.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/delay.h>
  30 #include <linux/pm.h>
  31
  32 #include <asm/reboot.h>
  33 #include <asm/mach-au1x00/au1000.h>
  34
  35 #include <prom.h>
  36
  37 static void xxs1500_reset(char *c)
  38 {
  39         /* Jump to the reset vector */
  40         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  41 }
  42
  43 static void xxs1500_power_off(void)
  44 {
  45         while (1)
  46                 asm volatile (
  47                 "       .set    mips32                                  \n"
  48                 "       wait                                            \n"
  49                 "       .set    mips0                                   \n");
  50 }
  51
  52 void __init board_setup(void)
  53 {
  54         u32 pin_func;
  55
  56         pm_power_off = xxs1500_power_off;
  57         _machine_halt = xxs1500_power_off;
  58         _machine_restart = xxs1500_reset;
  59
  60         alchemy_gpio1_input_enable();
  61         alchemy_gpio2_enable();
  62
  63         /* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
  64         pin_func  = au_readl(SYS_PINFUNC) & ~SYS_PF_UR3;
  65         pin_func |= SYS_PF_UR3;
  66         au_writel(pin_func, SYS_PINFUNC);
  67
  68         /* Enable UART */
  69         alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
  70         /* Enable DTR (MCR bit 0) = USB power up */
  71         __raw_writel(1, (void __iomem *)KSEG1ADDR(AU1000_UART3_PHYS_ADDR + 0x18));
  72         wmb();
  73 }
  74
  75 static int __init xxs1500_init_irq(void)
  76 {
  77         irq_set_irq_type(AU1500_GPIO204_INT, IRQF_TRIGGER_HIGH);
  78         irq_set_irq_type(AU1500_GPIO201_INT, IRQF_TRIGGER_LOW);
  79         irq_set_irq_type(AU1500_GPIO202_INT, IRQF_TRIGGER_LOW);
  80         irq_set_irq_type(AU1500_GPIO203_INT, IRQF_TRIGGER_LOW);
  81         irq_set_irq_type(AU1500_GPIO205_INT, IRQF_TRIGGER_LOW);
  82         irq_set_irq_type(AU1500_GPIO207_INT, IRQF_TRIGGER_LOW);
  83
  84         irq_set_irq_type(AU1500_GPIO0_INT, IRQF_TRIGGER_LOW);
  85         irq_set_irq_type(AU1500_GPIO1_INT, IRQF_TRIGGER_LOW);
  86         irq_set_irq_type(AU1500_GPIO2_INT, IRQF_TRIGGER_LOW);
  87         irq_set_irq_type(AU1500_GPIO3_INT, IRQF_TRIGGER_LOW);
  88         irq_set_irq_type(AU1500_GPIO4_INT, IRQF_TRIGGER_LOW); /* CF irq */
  89         irq_set_irq_type(AU1500_GPIO5_INT, IRQF_TRIGGER_LOW);
  90
  91         return 0;
  92 }
  93 arch_initcall(xxs1500_init_irq);