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/time.h>
  26 #include <asm/machdep.h>
  27 #include <asm/pci-bridge.h>
  28 #include <mm/mmu_decl.h>
  29 #include <asm/prom.h>
  30 #include <asm/udbg.h>
  31 #include <asm/mpic.h>
  32 #include "smp.h"
  33
  34 #include <sysdev/fsl_soc.h>
  35 #include <sysdev/fsl_pci.h>
  36
  37 #include "mpc85xx.h"
  38
  39 /* ************************************************************************
  40  *
  41  * Setup the architecture
  42  *
  43  */
  44 static void __init mpc85xx_rds_setup_arch(void)
  45 {
  46         struct device_node *np;
  47
  48         if (ppc_md.progress)
  49                 ppc_md.progress("p1023_rds_setup_arch()", 0);
  50
  51         /* Map BCSR area */
  52         np = of_find_node_by_name(NULL, "bcsr");
  53         if (np != NULL) {
  54                 static u8 __iomem *bcsr_regs;
  55
  56                 bcsr_regs = of_iomap(np, 0);
  57                 of_node_put(np);
  58
  59                 if (!bcsr_regs) {
  60                         printk(KERN_ERR
  61                                "BCSR: Failed to map bcsr register space\n");
  62                         return;
  63                 } else {
  64 #define BCSR15_I2C_BUS0_SEG_CLR         0x07
  65 #define BCSR15_I2C_BUS0_SEG2            0x02
  66 /*
  67  * Note: Accessing exclusively i2c devices.
  68  *
  69  * The i2c controller selects initially ID EEPROM in the u-boot;
  70  * but if menu configuration selects RTC support in the kernel,
  71  * the i2c controller switches to select RTC chip in the kernel.
  72  */
  73 #ifdef CONFIG_RTC_CLASS
  74                         /* Enable RTC chip on the segment #2 of i2c */
  75                         clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
  76                         setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
  77 #endif
  78
  79                         iounmap(bcsr_regs);
  80                 }
  81         }
  82
  83 #ifdef CONFIG_PCI
  84         for_each_compatible_node(np, "pci", "fsl,p1023-pcie")
  85                 fsl_add_bridge(np, 0);
  86 #endif
  87
  88         mpc85xx_smp_init();
  89 }
  90
  91 machine_device_initcall(p1023_rds, mpc85xx_common_publish_devices);
  92
  93 static void __init mpc85xx_rds_pic_init(void)
  94 {
  95         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
  96                 MPIC_SINGLE_DEST_CPU,
  97                 0, 256, " OpenPIC  ");
  98
  99         BUG_ON(mpic == NULL);
 100
 101         mpic_init(mpic);
 102 }
 103
 104 static int __init p1023_rds_probe(void)
 105 {
 106         unsigned long root = of_get_flat_dt_root();
 107
 108         return of_flat_dt_is_compatible(root, "fsl,P1023RDS");
 109
 110 }
 111
 112 define_machine(p1023_rds) {
 113         .name                   = "P1023 RDS",
 114         .probe                  = p1023_rds_probe,
 115         .setup_arch             = mpc85xx_rds_setup_arch,
 116         .init_IRQ               = mpc85xx_rds_pic_init,
 117         .get_irq                = mpic_get_irq,
 118         .restart                = fsl_rstcr_restart,
 119         .calibrate_decr         = generic_calibrate_decr,
 120         .progress               = udbg_progress,
 121 #ifdef CONFIG_PCI
 122         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 123 #endif
 124 };
 125