cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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board-mss2.c (2126B)

      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}