arch/arm/mach-orion5x/board-mss2.c

   1 /*
   2  * Maxtor Shared Storage II Board Setup
   3  *
   4  * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/pci.h>
  16 #include <linux/irq.h>
  17 #include <asm/mach-types.h>
  18 #include <asm/mach/arch.h>
  19 #include <asm/mach/pci.h>
  20 #include <mach/orion5x.h>
  21 #include <mach/bridge-regs.h>
  22 #include "common.h"
  23
  24 /*****************************************************************************
  25  * Maxtor Shared Storage II Info
  26  ****************************************************************************/
  27
  28 /****************************************************************************
  29  * PCI setup
  30  ****************************************************************************/
  31 static int __init mss2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  32 {
  33         int irq;
  34
  35         /*
  36          * Check for devices with hard-wired IRQs.
  37          */
  38         irq = orion5x_pci_map_irq(dev, slot, pin);
  39         if (irq != -1)
  40                 return irq;
  41
  42         return -1;
  43 }
  44
  45 static struct hw_pci mss2_pci __initdata = {
  46         .nr_controllers = 2,
  47         .setup          = orion5x_pci_sys_setup,
  48         .scan           = orion5x_pci_sys_scan_bus,
  49         .map_irq        = mss2_pci_map_irq,
  50 };
  51
  52 static int __init mss2_pci_init(void)
  53 {
  54         if (machine_is_mss2())
  55                 pci_common_init(&mss2_pci);
  56
  57         return 0;
  58 }
  59 subsys_initcall(mss2_pci_init);
  60
  61 /*****************************************************************************
  62  * MSS2 power off method
  63  ****************************************************************************/
  64 /*
  65  * On the Maxtor Shared Storage II, the shutdown process is the following :
  66  * - Userland modifies U-boot env to tell U-boot to go idle at next boot
  67  * - The board reboots
  68  * - U-boot starts and go into an idle mode until the user press "power"
  69  */
  70 static void mss2_power_off(void)
  71 {
  72         u32 reg;
  73
  74         /*
  75          * Enable and issue soft reset
  76          */
  77         reg = readl(RSTOUTn_MASK);
  78         reg |= 1 << 2;
  79         writel(reg, RSTOUTn_MASK);
  80
  81         reg = readl(CPU_SOFT_RESET);
  82         reg |= 1;
  83         writel(reg, CPU_SOFT_RESET);
  84 }
  85
  86 void __init mss2_init(void)
  87 {
  88         /* register mss2 specific power-off method */
  89         pm_power_off = mss2_power_off;
  90 }