linux/arch/powerpc/platforms/85xx/tqm85xx.c
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   1/*
   2 * Based on MPC8560 ADS and arch/ppc tqm85xx ports
   3 *
   4 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   5 *
   6 * Copyright 2008 Freescale Semiconductor Inc.
   7 *
   8 * Copyright (c) 2005-2006 DENX Software Engineering
   9 * Stefan Roese <sr@denx.de>
  10 *
  11 * Based on original work by
  12 *      Kumar Gala <kumar.gala@freescale.com>
  13 *      Copyright 2004 Freescale Semiconductor Inc.
  14 *
  15 * This program is free software; you can redistribute  it and/or modify it
  16 * under  the terms of  the GNU General  Public License as published by the
  17 * Free Software Foundation;  either version 2 of the  License, or (at your
  18 * option) any later version.
  19 */
  20
  21#include <linux/stddef.h>
  22#include <linux/kernel.h>
  23#include <linux/pci.h>
  24#include <linux/kdev_t.h>
  25#include <linux/delay.h>
  26#include <linux/seq_file.h>
  27#include <linux/of_platform.h>
  28
  29#include <asm/system.h>
  30#include <asm/time.h>
  31#include <asm/machdep.h>
  32#include <asm/pci-bridge.h>
  33#include <asm/mpic.h>
  34#include <asm/prom.h>
  35#include <mm/mmu_decl.h>
  36#include <asm/udbg.h>
  37
  38#include <sysdev/fsl_soc.h>
  39#include <sysdev/fsl_pci.h>
  40
  41#include "mpc85xx.h"
  42
  43#ifdef CONFIG_CPM2
  44#include <asm/cpm2.h>
  45#endif /* CONFIG_CPM2 */
  46
  47static void __init tqm85xx_pic_init(void)
  48{
  49        struct mpic *mpic = mpic_alloc(NULL, 0,
  50                        MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  51                        0, 256, " OpenPIC  ");
  52        BUG_ON(mpic == NULL);
  53        mpic_init(mpic);
  54
  55        mpc85xx_cpm2_pic_init();
  56}
  57
  58/*
  59 * Setup the architecture
  60 */
  61static void __init tqm85xx_setup_arch(void)
  62{
  63#ifdef CONFIG_PCI
  64        struct device_node *np;
  65#endif
  66
  67        if (ppc_md.progress)
  68                ppc_md.progress("tqm85xx_setup_arch()", 0);
  69
  70#ifdef CONFIG_CPM2
  71        cpm2_reset();
  72#endif
  73
  74#ifdef CONFIG_PCI
  75        for_each_node_by_type(np, "pci") {
  76                if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
  77                    of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
  78                        struct resource rsrc;
  79                        if (!of_address_to_resource(np, 0, &rsrc)) {
  80                                if ((rsrc.start & 0xfffff) == 0x8000)
  81                                        fsl_add_bridge(np, 1);
  82                                else
  83                                        fsl_add_bridge(np, 0);
  84                        }
  85                }
  86        }
  87#endif
  88}
  89
  90static void tqm85xx_show_cpuinfo(struct seq_file *m)
  91{
  92        uint pvid, svid, phid1;
  93
  94        pvid = mfspr(SPRN_PVR);
  95        svid = mfspr(SPRN_SVR);
  96
  97        seq_printf(m, "Vendor\t\t: TQ Components\n");
  98        seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
  99        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 100
 101        /* Display cpu Pll setting */
 102        phid1 = mfspr(SPRN_HID1);
 103        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 104}
 105
 106static void __init tqm85xx_ti1520_fixup(struct pci_dev *pdev)
 107{
 108        unsigned int val;
 109
 110        /* Do not do the fixup on other platforms! */
 111        if (!machine_is(tqm85xx))
 112                return;
 113
 114        dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
 115
 116        /*
 117         * Enable P2CCLK bit in system control register
 118         * to enable CLOCK output to power chip
 119         */
 120        pci_read_config_dword(pdev, 0x80, &val);
 121        pci_write_config_dword(pdev, 0x80, val | (1 << 27));
 122
 123}
 124DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 125                tqm85xx_ti1520_fixup);
 126
 127machine_device_initcall(tqm85xx, mpc85xx_common_publish_devices);
 128
 129static const char *board[] __initdata = {
 130        "tqc,tqm8540",
 131        "tqc,tqm8541",
 132        "tqc,tqm8548",
 133        "tqc,tqm8555",
 134        "tqc,tqm8560",
 135        NULL
 136};
 137
 138/*
 139 * Called very early, device-tree isn't unflattened
 140 */
 141static int __init tqm85xx_probe(void)
 142{
 143        return of_flat_dt_match(of_get_flat_dt_root(), board);
 144}
 145
 146define_machine(tqm85xx) {
 147        .name                   = "TQM85xx",
 148        .probe                  = tqm85xx_probe,
 149        .setup_arch             = tqm85xx_setup_arch,
 150        .init_IRQ               = tqm85xx_pic_init,
 151        .show_cpuinfo           = tqm85xx_show_cpuinfo,
 152        .get_irq                = mpic_get_irq,
 153        .restart                = fsl_rstcr_restart,
 154        .calibrate_decr         = generic_calibrate_decr,
 155        .progress               = udbg_progress,
 156};
 157