arch/powerpc/platforms/83xx/mpc836x_mds.c

   1 /*
   2  * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
   3  *
   4  * Author: Li Yang <LeoLi@freescale.com>
   5  *         Yin Olivia <Hong-hua.Yin@freescale.com>
   6  *
   7  * Description:
   8  * MPC8360E MDS board specific routines.
   9  *
  10  * Changelog:
  11  * Jun 21, 2006 Initial version
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under  the terms of  the GNU General  Public License as published by the
  15  * Free Software Foundation;  either version 2 of the  License, or (at your
  16  * option) any later version.
  17  */
  18
  19 #include <linux/stddef.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/errno.h>
  23 #include <linux/reboot.h>
  24 #include <linux/pci.h>
  25 #include <linux/kdev_t.h>
  26 #include <linux/major.h>
  27 #include <linux/console.h>
  28 #include <linux/delay.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/initrd.h>
  32
  33 #include <asm/of_device.h>
  34 #include <asm/of_platform.h>
  35 #include <asm/system.h>
  36 #include <asm/atomic.h>
  37 #include <asm/time.h>
  38 #include <asm/io.h>
  39 #include <asm/machdep.h>
  40 #include <asm/ipic.h>
  41 #include <asm/bootinfo.h>
  42 #include <asm/irq.h>
  43 #include <asm/prom.h>
  44 #include <asm/udbg.h>
  45 #include <sysdev/fsl_soc.h>
  46 #include <asm/qe.h>
  47 #include <asm/qe_ic.h>
  48
  49 #include "mpc83xx.h"
  50
  51 #undef DEBUG
  52 #ifdef DEBUG
  53 #define DBG(fmt...) udbg_printf(fmt)
  54 #else
  55 #define DBG(fmt...)
  56 #endif
  57
  58 #ifndef CONFIG_PCI
  59 unsigned long isa_io_base = 0;
  60 unsigned long isa_mem_base = 0;
  61 #endif
  62
  63 static u8 *bcsr_regs = NULL;
  64
  65 /* ************************************************************************
  66  *
  67  * Setup the architecture
  68  *
  69  */
  70 static void __init mpc836x_mds_setup_arch(void)
  71 {
  72         struct device_node *np;
  73
  74         if (ppc_md.progress)
  75                 ppc_md.progress("mpc836x_mds_setup_arch()", 0);
  76
  77         /* Map BCSR area */
  78         np = of_find_node_by_name(NULL, "bcsr");
  79         if (np != 0) {
  80                 struct resource res;
  81
  82                 of_address_to_resource(np, 0, &res);
  83                 bcsr_regs = ioremap(res.start, res.end - res.start +1);
  84                 of_node_put(np);
  85         }
  86
  87 #ifdef CONFIG_PCI
  88         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
  89                 add_bridge(np);
  90         ppc_md.pci_exclude_device = mpc83xx_exclude_device;
  91 #endif
  92
  93 #ifdef CONFIG_QUICC_ENGINE
  94         qe_reset();
  95
  96         if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
  97                 par_io_init(np);
  98                 of_node_put(np);
  99
 100                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
 101                         par_io_of_config(np);
 102         }
 103
 104         if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
 105                         != NULL){
 106                 /* Reset the Ethernet PHY */
 107                 bcsr_regs[9] &= ~0x20;
 108                 udelay(1000);
 109                 bcsr_regs[9] |= 0x20;
 110                 iounmap(bcsr_regs);
 111                 of_node_put(np);
 112         }
 113
 114 #endif                          /* CONFIG_QUICC_ENGINE */
 115 }
 116
 117 static struct of_device_id mpc836x_ids[] = {
 118         { .type = "soc", },
 119         { .compatible = "soc", },
 120         { .type = "qe", },
 121         {},
 122 };
 123
 124 static int __init mpc836x_declare_of_platform_devices(void)
 125 {
 126         if (!machine_is(mpc836x_mds))
 127                 return 0;
 128
 129         /* Publish the QE devices */
 130         of_platform_bus_probe(NULL, mpc836x_ids, NULL);
 131
 132         return 0;
 133 }
 134 device_initcall(mpc836x_declare_of_platform_devices);
 135
 136 static void __init mpc836x_mds_init_IRQ(void)
 137 {
 138         struct device_node *np;
 139
 140         np = of_find_node_by_type(NULL, "ipic");
 141         if (!np)
 142                 return;
 143
 144         ipic_init(np, 0);
 145
 146         /* Initialize the default interrupt mapping priorities,
 147          * in case the boot rom changed something on us.
 148          */
 149         ipic_set_default_priority();
 150         of_node_put(np);
 151
 152 #ifdef CONFIG_QUICC_ENGINE
 153         np = of_find_node_by_type(NULL, "qeic");
 154         if (!np)
 155                 return;
 156
 157         qe_ic_init(np, 0);
 158         of_node_put(np);
 159 #endif                          /* CONFIG_QUICC_ENGINE */
 160 }
 161
 162 #if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374)
 163 extern ulong ds1374_get_rtc_time(void);
 164 extern int ds1374_set_rtc_time(ulong);
 165
 166 static int __init mpc8360_rtc_hookup(void)
 167 {
 168         struct timespec tv;
 169
 170         if (!machine_is(mpc836x_mds))
 171                 return 0;
 172
 173         ppc_md.get_rtc_time = ds1374_get_rtc_time;
 174         ppc_md.set_rtc_time = ds1374_set_rtc_time;
 175
 176         tv.tv_nsec = 0;
 177         tv.tv_sec = (ppc_md.get_rtc_time) ();
 178         do_settimeofday(&tv);
 179
 180         return 0;
 181 }
 182
 183 late_initcall(mpc8360_rtc_hookup);
 184 #endif
 185
 186 /*
 187  * Called very early, MMU is off, device-tree isn't unflattened
 188  */
 189 static int __init mpc836x_mds_probe(void)
 190 {
 191         unsigned long root = of_get_flat_dt_root();
 192
 193         return of_flat_dt_is_compatible(root, "MPC836xMDS");
 194 }
 195
 196 define_machine(mpc836x_mds) {
 197         .name           = "MPC836x MDS",
 198         .probe          = mpc836x_mds_probe,
 199         .setup_arch     = mpc836x_mds_setup_arch,
 200         .init_IRQ       = mpc836x_mds_init_IRQ,
 201         .get_irq        = ipic_get_irq,
 202         .restart        = mpc83xx_restart,
 203         .time_init      = mpc83xx_time_init,
 204         .calibrate_decr = generic_calibrate_decr,
 205         .progress       = udbg_progress,
 206 };