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/time.h>
  30 #include <asm/machdep.h>
  31 #include <asm/pci-bridge.h>
  32 #include <asm/mpic.h>
  33 #include <asm/prom.h>
  34 #include <mm/mmu_decl.h>
  35 #include <asm/udbg.h>
  36
  37 #include <sysdev/fsl_soc.h>
  38 #include <sysdev/fsl_pci.h>
  39
  40 #include "mpc85xx.h"
  41
  42 #ifdef CONFIG_CPM2
  43 #include <asm/cpm2.h>
  44 #endif /* CONFIG_CPM2 */
  45
  46 static void __init tqm85xx_pic_init(void)
  47 {
  48         struct mpic *mpic = mpic_alloc(NULL, 0,
  49                         MPIC_BIG_ENDIAN,
  50                         0, 256, " OpenPIC  ");
  51         BUG_ON(mpic == NULL);
  52         mpic_init(mpic);
  53
  54         mpc85xx_cpm2_pic_init();
  55 }
  56
  57 /*
  58  * Setup the architecture
  59  */
  60 static void __init tqm85xx_setup_arch(void)
  61 {
  62         if (ppc_md.progress)
  63                 ppc_md.progress("tqm85xx_setup_arch()", 0);
  64
  65 #ifdef CONFIG_CPM2
  66         cpm2_reset();
  67 #endif
  68
  69         fsl_pci_assign_primary();
  70 }
  71
  72 static void tqm85xx_show_cpuinfo(struct seq_file *m)
  73 {
  74         uint pvid, svid, phid1;
  75
  76         pvid = mfspr(SPRN_PVR);
  77         svid = mfspr(SPRN_SVR);
  78
  79         seq_printf(m, "Vendor\t\t: TQ Components\n");
  80         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
  81         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  82
  83         /* Display cpu Pll setting */
  84         phid1 = mfspr(SPRN_HID1);
  85         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
  86 }
  87
  88 static void tqm85xx_ti1520_fixup(struct pci_dev *pdev)
  89 {
  90         unsigned int val;
  91
  92         /* Do not do the fixup on other platforms! */
  93         if (!machine_is(tqm85xx))
  94                 return;
  95
  96         dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
  97
  98         /*
  99          * Enable P2CCLK bit in system control register
 100          * to enable CLOCK output to power chip
 101          */
 102         pci_read_config_dword(pdev, 0x80, &val);
 103         pci_write_config_dword(pdev, 0x80, val | (1 << 27));
 104
 105 }
 106 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 107                 tqm85xx_ti1520_fixup);
 108
 109 machine_arch_initcall(tqm85xx, mpc85xx_common_publish_devices);
 110
 111 static const char * const board[] __initconst = {
 112         "tqc,tqm8540",
 113         "tqc,tqm8541",
 114         "tqc,tqm8548",
 115         "tqc,tqm8555",
 116         "tqc,tqm8560",
 117         NULL
 118 };
 119
 120 /*
 121  * Called very early, device-tree isn't unflattened
 122  */
 123 static int __init tqm85xx_probe(void)
 124 {
 125         return of_flat_dt_match(of_get_flat_dt_root(), board);
 126 }
 127
 128 define_machine(tqm85xx) {
 129         .name                   = "TQM85xx",
 130         .probe                  = tqm85xx_probe,
 131         .setup_arch             = tqm85xx_setup_arch,
 132         .init_IRQ               = tqm85xx_pic_init,
 133         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 134         .get_irq                = mpic_get_irq,
 135         .restart                = fsl_rstcr_restart,
 136         .calibrate_decr         = generic_calibrate_decr,
 137         .progress               = udbg_progress,
 138 };