LXR linux/arch/powerpc/platforms/86xx/mvme7100.c

   1/*
   2 * Board setup routines for the Emerson/Artesyn MVME7100
   3 *
   4 * Copyright 2016 Elettra-Sincrotrone Trieste S.C.p.A.
   5 *
   6 * Author: Alessio Igor Bogani <alessio.bogani@elettra.eu>
   7 *
   8 * Based on earlier code by:
   9 *
  10 *      Ajit Prem <ajit.prem@emerson.com>
  11 *      Copyright 2008 Emerson
  12 *
  13 * USB host fixup is borrowed by:
  14 *
  15 *      Martyn Welch <martyn.welch@ge.com>
  16 *      Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
  17 *
  18 * This program is free software; you can redistribute  it and/or modify it
  19 * under  the terms of  the GNU General  Public License as published by the
  20 * Free Software Foundation;  either version 2 of the  License, or (at your
  21 * option) any later version.
  22 *
  23 */
  24
  25#include <linux/pci.h>
  26#include <linux/of.h>
  27#include <linux/of_platform.h>
  28#include <linux/of_address.h>
  29#include <asm/udbg.h>
  30#include <asm/mpic.h>
  31#include <sysdev/fsl_soc.h>
  32#include <sysdev/fsl_pci.h>
  33
  34#include "mpc86xx.h"
  35
  36#define MVME7100_INTERRUPT_REG_2_OFFSET 0x05
  37#define MVME7100_DS1375_MASK            0x40
  38#define MVME7100_MAX6649_MASK           0x20
  39#define MVME7100_ABORT_MASK             0x10
  40
  41/*
  42 * Setup the architecture
  43 */
  44static void __init mvme7100_setup_arch(void)
  45{
  46        struct device_node *bcsr_node;
  47        void __iomem *mvme7100_regs = NULL;
  48        u8 reg;
  49
  50        if (ppc_md.progress)
  51                ppc_md.progress("mvme7100_setup_arch()", 0);
  52
  53#ifdef CONFIG_SMP
  54        mpc86xx_smp_init();
  55#endif
  56
  57        fsl_pci_assign_primary();
  58
  59        /* Remap BCSR registers */
  60        bcsr_node = of_find_compatible_node(NULL, NULL,
  61                        "artesyn,mvme7100-bcsr");
  62        if (bcsr_node) {
  63                mvme7100_regs = of_iomap(bcsr_node, 0);
  64                of_node_put(bcsr_node);
  65        }
  66
  67        if (mvme7100_regs) {
  68                /* Disable ds1375, max6649, and abort interrupts */
  69                reg = readb(mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET);
  70                reg |= MVME7100_DS1375_MASK | MVME7100_MAX6649_MASK
  71                        | MVME7100_ABORT_MASK;
  72                writeb(reg, mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET);
  73        } else
  74                pr_warn("Unable to map board registers\n");
  75
  76        pr_info("MVME7100 board from Artesyn\n");
  77}
  78
  79/*
  80 * Called very early, device-tree isn't unflattened
  81 */
  82static int __init mvme7100_probe(void)
  83{
  84        unsigned long root = of_get_flat_dt_root();
  85
  86        return of_flat_dt_is_compatible(root, "artesyn,MVME7100");
  87}
  88
  89static void mvme7100_usb_host_fixup(struct pci_dev *pdev)
  90{
  91        unsigned int val;
  92
  93        if (!machine_is(mvme7100))
  94                return;
  95
  96        /* Ensure only ports 1 & 2 are enabled */
  97        pci_read_config_dword(pdev, 0xe0, &val);
  98        pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2);
  99
 100        /* System clock is 48-MHz Oscillator and EHCI Enabled. */
 101        pci_write_config_dword(pdev, 0xe4, 1 << 5);
 102}
 103DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
 104        mvme7100_usb_host_fixup);
 105
 106machine_arch_initcall(mvme7100, mpc86xx_common_publish_devices);
 107
 108define_machine(mvme7100) {
 109        .name                   = "MVME7100",
 110        .probe                  = mvme7100_probe,
 111        .setup_arch             = mvme7100_setup_arch,
 112        .init_IRQ               = mpc86xx_init_irq,
 113        .get_irq                = mpic_get_irq,
 114        .time_init              = mpc86xx_time_init,
 115        .calibrate_decr         = generic_calibrate_decr,
 116        .progress               = udbg_progress,
 117#ifdef CONFIG_PCI
 118        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 119#endif
 120};
 121