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 "orion5x.h"
21 #include "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 }
91