LXR linux/arch/powerpc/platforms/83xx/mpc834x

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * arch/powerpc/platforms/83xx/mpc834x_mds.c
   4 *
   5 * MPC834x MDS board specific routines
   6 *
   7 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
   8 */
   9
  10#include <linux/stddef.h>
  11#include <linux/kernel.h>
  12#include <linux/init.h>
  13#include <linux/errno.h>
  14#include <linux/reboot.h>
  15#include <linux/pci.h>
  16#include <linux/kdev_t.h>
  17#include <linux/major.h>
  18#include <linux/console.h>
  19#include <linux/delay.h>
  20#include <linux/seq_file.h>
  21#include <linux/root_dev.h>
  22#include <linux/of_platform.h>
  23
  24#include <linux/atomic.h>
  25#include <asm/time.h>
  26#include <asm/io.h>
  27#include <asm/machdep.h>
  28#include <asm/ipic.h>
  29#include <asm/irq.h>
  30#include <asm/prom.h>
  31#include <asm/udbg.h>
  32#include <sysdev/fsl_soc.h>
  33#include <sysdev/fsl_pci.h>
  34
  35#include "mpc83xx.h"
  36
  37#define BCSR5_INT_USB           0x02
  38static int mpc834xemds_usb_cfg(void)
  39{
  40        struct device_node *np;
  41        void __iomem *bcsr_regs = NULL;
  42        u8 bcsr5;
  43
  44        mpc834x_usb_cfg();
  45        /* Map BCSR area */
  46        np = of_find_node_by_name(NULL, "bcsr");
  47        if (np) {
  48                struct resource res;
  49
  50                of_address_to_resource(np, 0, &res);
  51                bcsr_regs = ioremap(res.start, resource_size(&res));
  52                of_node_put(np);
  53        }
  54        if (!bcsr_regs)
  55                return -1;
  56
  57        /*
  58         * if Processor Board is plugged into PIB board,
  59         * force to use the PHY on Processor Board
  60         */
  61        bcsr5 = in_8(bcsr_regs + 5);
  62        if (!(bcsr5 & BCSR5_INT_USB))
  63                out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
  64        iounmap(bcsr_regs);
  65        return 0;
  66}
  67
  68/* ************************************************************************
  69 *
  70 * Setup the architecture
  71 *
  72 */
  73static void __init mpc834x_mds_setup_arch(void)
  74{
  75        mpc83xx_setup_arch();
  76
  77        mpc834xemds_usb_cfg();
  78}
  79
  80machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
  81
  82/*
  83 * Called very early, MMU is off, device-tree isn't unflattened
  84 */
  85static int __init mpc834x_mds_probe(void)
  86{
  87        return of_machine_is_compatible("MPC834xMDS");
  88}
  89
  90define_machine(mpc834x_mds) {
  91        .name                   = "MPC834x MDS",
  92        .probe                  = mpc834x_mds_probe,
  93        .setup_arch             = mpc834x_mds_setup_arch,
  94        .init_IRQ               = mpc83xx_ipic_init_IRQ,
  95        .get_irq                = ipic_get_irq,
  96        .restart                = mpc83xx_restart,
  97        .time_init              = mpc83xx_time_init,
  98        .calibrate_decr         = generic_calibrate_decr,
  99        .progress               = udbg_progress,
 100};
 101