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;
  50         struct resource r;
  51         struct device_node *np;
  52
  53         np = of_find_node_by_type(NULL, "open-pic");
  54         if (!np) {
  55                 printk(KERN_ERR "Could not find open-pic node\n");
  56                 return;
  57         }
  58
  59         if (of_address_to_resource(np, 0, &r)) {
  60                 printk(KERN_ERR "Could not map mpic register space\n");
  61                 of_node_put(np);
  62                 return;
  63         }
  64
  65         mpic = mpic_alloc(np, r.start,
  66                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  67                         0, 256, " OpenPIC  ");
  68         BUG_ON(mpic == NULL);
  69         of_node_put(np);
  70
  71         mpic_init(mpic);
  72
  73         mpc85xx_cpm2_pic_init();
  74 }
  75
  76 /*
  77  * Setup the architecture
  78  */
  79 static void __init tqm85xx_setup_arch(void)
  80 {
  81 #ifdef CONFIG_PCI
  82         struct device_node *np;
  83 #endif
  84
  85         if (ppc_md.progress)
  86                 ppc_md.progress("tqm85xx_setup_arch()", 0);
  87
  88 #ifdef CONFIG_CPM2
  89         cpm2_reset();
  90 #endif
  91
  92 #ifdef CONFIG_PCI
  93         for_each_node_by_type(np, "pci") {
  94                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
  95                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
  96                         struct resource rsrc;
  97                         if (!of_address_to_resource(np, 0, &rsrc)) {
  98                                 if ((rsrc.start & 0xfffff) == 0x8000)
  99                                         fsl_add_bridge(np, 1);
 100                                 else
 101                                         fsl_add_bridge(np, 0);
 102                         }
 103                 }
 104         }
 105 #endif
 106 }
 107
 108 static void tqm85xx_show_cpuinfo(struct seq_file *m)
 109 {
 110         uint pvid, svid, phid1;
 111
 112         pvid = mfspr(SPRN_PVR);
 113         svid = mfspr(SPRN_SVR);
 114
 115         seq_printf(m, "Vendor\t\t: TQ Components\n");
 116         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 117         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 118
 119         /* Display cpu Pll setting */
 120         phid1 = mfspr(SPRN_HID1);
 121         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 122 }
 123
 124 static void __init tqm85xx_ti1520_fixup(struct pci_dev *pdev)
 125 {
 126         unsigned int val;
 127
 128         /* Do not do the fixup on other platforms! */
 129         if (!machine_is(tqm85xx))
 130                 return;
 131
 132         dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
 133
 134         /*
 135          * Enable P2CCLK bit in system control register
 136          * to enable CLOCK output to power chip
 137          */
 138         pci_read_config_dword(pdev, 0x80, &val);
 139         pci_write_config_dword(pdev, 0x80, val | (1 << 27));
 140
 141 }
 142 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 143                 tqm85xx_ti1520_fixup);
 144
 145 machine_device_initcall(tqm85xx, mpc85xx_common_publish_devices);
 146
 147 static const char *board[] __initdata = {
 148         "tqc,tqm8540",
 149         "tqc,tqm8541",
 150         "tqc,tqm8548",
 151         "tqc,tqm8555",
 152         "tqc,tqm8560",
 153         NULL
 154 };
 155
 156 /*
 157  * Called very early, device-tree isn't unflattened
 158  */
 159 static int __init tqm85xx_probe(void)
 160 {
 161         return of_flat_dt_match(of_get_flat_dt_root(), board);
 162 }
 163
 164 define_machine(tqm85xx) {
 165         .name                   = "TQM85xx",
 166         .probe                  = tqm85xx_probe,
 167         .setup_arch             = tqm85xx_setup_arch,
 168         .init_IRQ               = tqm85xx_pic_init,
 169         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 170         .get_irq                = mpic_get_irq,
 171         .restart                = fsl_rstcr_restart,
 172         .calibrate_decr         = generic_calibrate_decr,
 173         .progress               = udbg_progress,
 174 };