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
  34 #include <sysdev/fsl_soc.h>
  35 #include <sysdev/fsl_pci.h>
  36
  37 /* ************************************************************************
  38  *
  39  * Setup the architecture
  40  *
  41  */
  42 #ifdef CONFIG_SMP
  43 void __init mpc85xx_smp_init(void);
  44 #endif
  45
  46 static void __init mpc85xx_rds_setup_arch(void)
  47 {
  48         struct device_node *np;
  49
  50         if (ppc_md.progress)
  51                 ppc_md.progress("p1023_rds_setup_arch()", 0);
  52
  53         /* Map BCSR area */
  54         np = of_find_node_by_name(NULL, "bcsr");
  55         if (np != NULL) {
  56                 static u8 __iomem *bcsr_regs;
  57
  58                 bcsr_regs = of_iomap(np, 0);
  59                 of_node_put(np);
  60
  61                 if (!bcsr_regs) {
  62                         printk(KERN_ERR
  63                                "BCSR: Failed to map bcsr register space\n");
  64                         return;
  65                 } else {
  66 #define BCSR15_I2C_BUS0_SEG_CLR         0x07
  67 #define BCSR15_I2C_BUS0_SEG2            0x02
  68 /*
  69  * Note: Accessing exclusively i2c devices.
  70  *
  71  * The i2c controller selects initially ID EEPROM in the u-boot;
  72  * but if menu configuration selects RTC support in the kernel,
  73  * the i2c controller switches to select RTC chip in the kernel.
  74  */
  75 #ifdef CONFIG_RTC_CLASS
  76                         /* Enable RTC chip on the segment #2 of i2c */
  77                         clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
  78                         setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
  79 #endif
  80
  81                         iounmap(bcsr_regs);
  82                 }
  83         }
  84
  85 #ifdef CONFIG_PCI
  86         for_each_compatible_node(np, "pci", "fsl,p1023-pcie")
  87                 fsl_add_bridge(np, 0);
  88 #endif
  89
  90 #ifdef CONFIG_SMP
  91         mpc85xx_smp_init();
  92 #endif
  93 }
  94
  95 static struct of_device_id p1023_ids[] = {
  96         { .type = "soc", },
  97         { .compatible = "soc", },
  98         { .compatible = "simple-bus", },
  99         {},
 100 };
 101
 102
 103 static int __init p1023_publish_devices(void)
 104 {
 105         of_platform_bus_probe(NULL, p1023_ids, NULL);
 106
 107         return 0;
 108 }
 109
 110 machine_device_initcall(p1023_rds, p1023_publish_devices);
 111
 112 static void __init mpc85xx_rds_pic_init(void)
 113 {
 114         struct mpic *mpic;
 115         struct resource r;
 116         struct device_node *np = NULL;
 117
 118         np = of_find_node_by_type(NULL, "open-pic");
 119         if (!np) {
 120                 printk(KERN_ERR "Could not find open-pic node\n");
 121                 return;
 122         }
 123
 124         if (of_address_to_resource(np, 0, &r)) {
 125                 printk(KERN_ERR "Failed to map mpic register space\n");
 126                 of_node_put(np);
 127                 return;
 128         }
 129
 130         mpic = mpic_alloc(np, r.start,
 131                 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
 132                 MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
 133                 0, 256, " OpenPIC  ");
 134
 135         BUG_ON(mpic == NULL);
 136         of_node_put(np);
 137
 138         mpic_init(mpic);
 139 }
 140
 141 static int __init p1023_rds_probe(void)
 142 {
 143         unsigned long root = of_get_flat_dt_root();
 144
 145         return of_flat_dt_is_compatible(root, "fsl,P1023RDS");
 146
 147 }
 148
 149 define_machine(p1023_rds) {
 150         .name                   = "P1023 RDS",
 151         .probe                  = p1023_rds_probe,
 152         .setup_arch             = mpc85xx_rds_setup_arch,
 153         .init_IRQ               = mpc85xx_rds_pic_init,
 154         .get_irq                = mpic_get_irq,
 155         .restart                = fsl_rstcr_restart,
 156         .calibrate_decr         = generic_calibrate_decr,
 157         .progress               = udbg_progress,
 158 #ifdef CONFIG_PCI
 159         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 160 #endif
 161 };
 162