1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Maxtor Shared Storage II Board Setup
4 *
5 * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
6 */
7
8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/platform_device.h>
11#include <linux/pci.h>
12#include <linux/irq.h>
13#include <asm/mach-types.h>
14#include <asm/mach/arch.h>
15#include <asm/mach/pci.h>
16#include "orion5x.h"
17#include "bridge-regs.h"
18#include "common.h"
19
20/*****************************************************************************
21 * Maxtor Shared Storage II Info
22 ****************************************************************************/
23
24/****************************************************************************
25 * PCI setup
26 ****************************************************************************/
27static int __init mss2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
28{
29	int irq;
30
31	/*
32	 * Check for devices with hard-wired IRQs.
33	 */
34	irq = orion5x_pci_map_irq(dev, slot, pin);
35	if (irq != -1)
36		return irq;
37
38	return -1;
39}
40
41static struct hw_pci mss2_pci __initdata = {
42	.nr_controllers = 2,
43	.setup		= orion5x_pci_sys_setup,
44	.scan		= orion5x_pci_sys_scan_bus,
45	.map_irq	= mss2_pci_map_irq,
46};
47
48static int __init mss2_pci_init(void)
49{
50	if (machine_is_mss2())
51		pci_common_init(&mss2_pci);
52
53	return 0;
54}
55subsys_initcall(mss2_pci_init);
56
57/*****************************************************************************
58 * MSS2 power off method
59 ****************************************************************************/
60/*
61 * On the Maxtor Shared Storage II, the shutdown process is the following :
62 * - Userland modifies U-boot env to tell U-boot to go idle at next boot
63 * - The board reboots
64 * - U-boot starts and go into an idle mode until the user press "power"
65 */
66static void mss2_power_off(void)
67{
68	u32 reg;
69
70	/*
71	 * Enable and issue soft reset
72	 */
73	reg = readl(RSTOUTn_MASK);
74	reg |= 1 << 2;
75	writel(reg, RSTOUTn_MASK);
76
77	reg = readl(CPU_SOFT_RESET);
78	reg |= 1;
79	writel(reg, CPU_SOFT_RESET);
80}
81
82void __init mss2_init(void)
83{
84	/* register mss2 specific power-off method */
85	pm_power_off = mss2_power_off;
86}
87