linux/arch/powerpc/platforms/85xx/p1023_rds.c
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   1/*
   2 * Copyright 2010-2011 Freescale Semiconductor, Inc.
   3 *
   4 * Author: Roy Zang <tie-fei.zang@freescale.com>
   5 *
   6 * Description:
   7 * P1023 RDS Board Setup
   8 *
   9 * This program is free software; you can redistribute  it and/or modify it
  10 * under  the terms of  the GNU General  Public License as published by the
  11 * Free Software Foundation;  either version 2 of the  License, or (at your
  12 * option) any later version.
  13 */
  14
  15#include <linux/kernel.h>
  16#include <linux/init.h>
  17#include <linux/errno.h>
  18#include <linux/pci.h>
  19#include <linux/delay.h>
  20#include <linux/module.h>
  21#include <linux/fsl_devices.h>
  22#include <linux/of_platform.h>
  23#include <linux/of_device.h>
  24
  25#include <asm/system.h>
  26#include <asm/time.h>
  27#include <asm/machdep.h>
  28#include <asm/pci-bridge.h>
  29#include <mm/mmu_decl.h>
  30#include <asm/prom.h>
  31#include <asm/udbg.h>
  32#include <asm/mpic.h>
  33#include "smp.h"
  34
  35#include <sysdev/fsl_soc.h>
  36#include <sysdev/fsl_pci.h>
  37
  38#include "mpc85xx.h"
  39
  40/* ************************************************************************
  41 *
  42 * Setup the architecture
  43 *
  44 */
  45static void __init mpc85xx_rds_setup_arch(void)
  46{
  47        struct device_node *np;
  48
  49        if (ppc_md.progress)
  50                ppc_md.progress("p1023_rds_setup_arch()", 0);
  51
  52        /* Map BCSR area */
  53        np = of_find_node_by_name(NULL, "bcsr");
  54        if (np != NULL) {
  55                static u8 __iomem *bcsr_regs;
  56
  57                bcsr_regs = of_iomap(np, 0);
  58                of_node_put(np);
  59
  60                if (!bcsr_regs) {
  61                        printk(KERN_ERR
  62                               "BCSR: Failed to map bcsr register space\n");
  63                        return;
  64                } else {
  65#define BCSR15_I2C_BUS0_SEG_CLR         0x07
  66#define BCSR15_I2C_BUS0_SEG2            0x02
  67/*
  68 * Note: Accessing exclusively i2c devices.
  69 *
  70 * The i2c controller selects initially ID EEPROM in the u-boot;
  71 * but if menu configuration selects RTC support in the kernel,
  72 * the i2c controller switches to select RTC chip in the kernel.
  73 */
  74#ifdef CONFIG_RTC_CLASS
  75                        /* Enable RTC chip on the segment #2 of i2c */
  76                        clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
  77                        setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
  78#endif
  79
  80                        iounmap(bcsr_regs);
  81                }
  82        }
  83
  84#ifdef CONFIG_PCI
  85        for_each_compatible_node(np, "pci", "fsl,p1023-pcie")
  86                fsl_add_bridge(np, 0);
  87#endif
  88
  89        mpc85xx_smp_init();
  90}
  91
  92machine_device_initcall(p1023_rds, mpc85xx_common_publish_devices);
  93
  94static void __init mpc85xx_rds_pic_init(void)
  95{
  96        struct mpic *mpic = mpic_alloc(NULL, 0,
  97                MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
  98                MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
  99                0, 256, " OpenPIC  ");
 100
 101        BUG_ON(mpic == NULL);
 102
 103        mpic_init(mpic);
 104}
 105
 106static int __init p1023_rds_probe(void)
 107{
 108        unsigned long root = of_get_flat_dt_root();
 109
 110        return of_flat_dt_is_compatible(root, "fsl,P1023RDS");
 111
 112}
 113
 114define_machine(p1023_rds) {
 115        .name                   = "P1023 RDS",
 116        .probe                  = p1023_rds_probe,
 117        .setup_arch             = mpc85xx_rds_setup_arch,
 118        .init_IRQ               = mpc85xx_rds_pic_init,
 119        .get_irq                = mpic_get_irq,
 120        .restart                = fsl_rstcr_restart,
 121        .calibrate_decr         = generic_calibrate_decr,
 122        .progress               = udbg_progress,
 123#ifdef CONFIG_PCI
 124        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 125#endif
 126};
 127
 128