arch/powerpc/platforms/85xx/tqm85xx.c

   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
  47 static 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  */
  61 static 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
  90 static 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
 106 static 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 }
 124 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 125                 tqm85xx_ti1520_fixup);
 126
 127 machine_device_initcall(tqm85xx, mpc85xx_common_publish_devices);
 128
 129 static 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  */
 141 static int __init tqm85xx_probe(void)
 142 {
 143         return of_flat_dt_match(of_get_flat_dt_root(), board);
 144 }
 145
 146 define_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 };