LXR linux/arch/powerpc/platforms/85xx/p1023

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
   4 *
   5 * Author: Roy Zang <tie-fei.zang@freescale.com>
   6 *
   7 * Description:
   8 * P1023 RDB Board Setup
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/init.h>
  13#include <linux/errno.h>
  14#include <linux/pci.h>
  15#include <linux/delay.h>
  16#include <linux/module.h>
  17#include <linux/fsl_devices.h>
  18#include <linux/of_address.h>
  19#include <linux/of_platform.h>
  20#include <linux/of_device.h>
  21
  22#include <asm/time.h>
  23#include <asm/machdep.h>
  24#include <asm/pci-bridge.h>
  25#include <mm/mmu_decl.h>
  26#include <asm/udbg.h>
  27#include <asm/mpic.h>
  28#include "smp.h"
  29
  30#include <sysdev/fsl_soc.h>
  31#include <sysdev/fsl_pci.h>
  32
  33#include "mpc85xx.h"
  34
  35/* ************************************************************************
  36 *
  37 * Setup the architecture
  38 *
  39 */
  40static void __init mpc85xx_rdb_setup_arch(void)
  41{
  42        struct device_node *np;
  43
  44        if (ppc_md.progress)
  45                ppc_md.progress("p1023_rdb_setup_arch()", 0);
  46
  47        /* Map BCSR area */
  48        np = of_find_node_by_name(NULL, "bcsr");
  49        if (np != NULL) {
  50                static u8 __iomem *bcsr_regs;
  51
  52                bcsr_regs = of_iomap(np, 0);
  53                of_node_put(np);
  54
  55                if (!bcsr_regs) {
  56                        printk(KERN_ERR
  57                               "BCSR: Failed to map bcsr register space\n");
  58                        return;
  59                } else {
  60#define BCSR15_I2C_BUS0_SEG_CLR         0x07
  61#define BCSR15_I2C_BUS0_SEG2            0x02
  62/*
  63 * Note: Accessing exclusively i2c devices.
  64 *
  65 * The i2c controller selects initially ID EEPROM in the u-boot;
  66 * but if menu configuration selects RTC support in the kernel,
  67 * the i2c controller switches to select RTC chip in the kernel.
  68 */
  69#ifdef CONFIG_RTC_CLASS
  70                        /* Enable RTC chip on the segment #2 of i2c */
  71                        clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
  72                        setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
  73#endif
  74
  75                        iounmap(bcsr_regs);
  76                }
  77        }
  78
  79        mpc85xx_smp_init();
  80
  81        fsl_pci_assign_primary();
  82}
  83
  84machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
  85
  86static void __init mpc85xx_rdb_pic_init(void)
  87{
  88        struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
  89                MPIC_SINGLE_DEST_CPU,
  90                0, 256, " OpenPIC  ");
  91
  92        BUG_ON(mpic == NULL);
  93
  94        mpic_init(mpic);
  95}
  96
  97static int __init p1023_rdb_probe(void)
  98{
  99        return of_machine_is_compatible("fsl,P1023RDB");
 100
 101}
 102
 103define_machine(p1023_rdb) {
 104        .name                   = "P1023 RDB",
 105        .probe                  = p1023_rdb_probe,
 106        .setup_arch             = mpc85xx_rdb_setup_arch,
 107        .init_IRQ               = mpc85xx_rdb_pic_init,
 108        .get_irq                = mpic_get_irq,
 109        .calibrate_decr         = generic_calibrate_decr,
 110        .progress               = udbg_progress,
 111#ifdef CONFIG_PCI
 112        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 113        .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 114#endif
 115};
 116