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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mpc837x_mds.c (2410B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * arch/powerpc/platforms/83xx/mpc837x_mds.c
      4 *
      5 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
      6 *
      7 * MPC837x MDS board specific routines
      8 */
      9
     10#include <linux/pci.h>
     11#include <linux/of.h>
     12#include <linux/of_address.h>
     13#include <linux/of_platform.h>
     14
     15#include <asm/time.h>
     16#include <asm/ipic.h>
     17#include <asm/udbg.h>
     18#include <sysdev/fsl_pci.h>
     19
     20#include "mpc83xx.h"
     21
     22#define BCSR12_USB_SER_MASK	0x8a
     23#define BCSR12_USB_SER_PIN	0x80
     24#define BCSR12_USB_SER_DEVICE	0x02
     25
     26static int __init mpc837xmds_usb_cfg(void)
     27{
     28	struct device_node *np;
     29	const void *phy_type, *mode;
     30	void __iomem *bcsr_regs = NULL;
     31	u8 bcsr12;
     32	int ret;
     33
     34	ret = mpc837x_usb_cfg();
     35	if (ret)
     36		return ret;
     37	/* Map BCSR area */
     38	np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
     39	if (np) {
     40		bcsr_regs = of_iomap(np, 0);
     41		of_node_put(np);
     42	}
     43	if (!bcsr_regs)
     44		return -1;
     45
     46	np = of_find_node_by_name(NULL, "usb");
     47	if (!np) {
     48		ret = -ENODEV;
     49		goto out;
     50	}
     51	phy_type = of_get_property(np, "phy_type", NULL);
     52	if (phy_type && !strcmp(phy_type, "ulpi")) {
     53		clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
     54	} else if (phy_type && !strcmp(phy_type, "serial")) {
     55		mode = of_get_property(np, "dr_mode", NULL);
     56		bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
     57		bcsr12 |= BCSR12_USB_SER_PIN;
     58		if (mode && !strcmp(mode, "peripheral"))
     59			bcsr12 |= BCSR12_USB_SER_DEVICE;
     60		out_8(bcsr_regs + 12, bcsr12);
     61	} else {
     62		printk(KERN_ERR "USB DR: unsupported PHY\n");
     63	}
     64
     65	of_node_put(np);
     66out:
     67	iounmap(bcsr_regs);
     68	return ret;
     69}
     70
     71/* ************************************************************************
     72 *
     73 * Setup the architecture
     74 *
     75 */
     76static void __init mpc837x_mds_setup_arch(void)
     77{
     78	mpc83xx_setup_arch();
     79	mpc837xmds_usb_cfg();
     80}
     81
     82machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
     83
     84/*
     85 * Called very early, MMU is off, device-tree isn't unflattened
     86 */
     87static int __init mpc837x_mds_probe(void)
     88{
     89	return of_machine_is_compatible("fsl,mpc837xmds");
     90}
     91
     92define_machine(mpc837x_mds) {
     93	.name			= "MPC837x MDS",
     94	.probe			= mpc837x_mds_probe,
     95	.setup_arch		= mpc837x_mds_setup_arch,
     96	.discover_phbs  	= mpc83xx_setup_pci,
     97	.init_IRQ		= mpc83xx_ipic_init_IRQ,
     98	.get_irq		= ipic_get_irq,
     99	.restart		= mpc83xx_restart,
    100	.time_init		= mpc83xx_time_init,
    101	.calibrate_decr		= generic_calibrate_decr,
    102	.progress		= udbg_progress,
    103};