arch/powerpc/platforms/85xx/p1023_rds.c

   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  */
  45 static 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
  92 machine_device_initcall(p1023_rds, mpc85xx_common_publish_devices);
  93
  94 static 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
 106 static 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
 114 define_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