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/irq.h>
  42 #include <asm/prom.h>
  43 #include <asm/udbg.h>
  44 #include <sysdev/fsl_soc.h>
  45 #include <asm/qe.h>
  46 #include <asm/qe_ic.h>
  47
  48 #include "mpc83xx.h"
  49
  50 #undef DEBUG
  51 #ifdef DEBUG
  52 #define DBG(fmt...) udbg_printf(fmt)
  53 #else
  54 #define DBG(fmt...)
  55 #endif
  56
  57 static u8 *bcsr_regs = NULL;
  58
  59 /* ************************************************************************
  60  *
  61  * Setup the architecture
  62  *
  63  */
  64 static void __init mpc836x_mds_setup_arch(void)
  65 {
  66         struct device_node *np;
  67
  68         if (ppc_md.progress)
  69                 ppc_md.progress("mpc836x_mds_setup_arch()", 0);
  70
  71         /* Map BCSR area */
  72         np = of_find_node_by_name(NULL, "bcsr");
  73         if (np != 0) {
  74                 struct resource res;
  75
  76                 of_address_to_resource(np, 0, &res);
  77                 bcsr_regs = ioremap(res.start, res.end - res.start +1);
  78                 of_node_put(np);
  79         }
  80
  81 #ifdef CONFIG_PCI
  82         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
  83                 mpc83xx_add_bridge(np);
  84         ppc_md.pci_exclude_device = mpc83xx_exclude_device;
  85 #endif
  86
  87 #ifdef CONFIG_QUICC_ENGINE
  88         qe_reset();
  89
  90         if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
  91                 par_io_init(np);
  92                 of_node_put(np);
  93
  94                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
  95                         par_io_of_config(np);
  96         }
  97
  98         if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
  99                         != NULL){
 100                 /* Reset the Ethernet PHY */
 101                 bcsr_regs[9] &= ~0x20;
 102                 udelay(1000);
 103                 bcsr_regs[9] |= 0x20;
 104                 iounmap(bcsr_regs);
 105                 of_node_put(np);
 106         }
 107
 108 #endif                          /* CONFIG_QUICC_ENGINE */
 109 }
 110
 111 static struct of_device_id mpc836x_ids[] = {
 112         { .type = "soc", },
 113         { .compatible = "soc", },
 114         { .type = "qe", },
 115         {},
 116 };
 117
 118 static int __init mpc836x_declare_of_platform_devices(void)
 119 {
 120         if (!machine_is(mpc836x_mds))
 121                 return 0;
 122
 123         /* Publish the QE devices */
 124         of_platform_bus_probe(NULL, mpc836x_ids, NULL);
 125
 126         return 0;
 127 }
 128 device_initcall(mpc836x_declare_of_platform_devices);
 129
 130 static void __init mpc836x_mds_init_IRQ(void)
 131 {
 132         struct device_node *np;
 133
 134         np = of_find_node_by_type(NULL, "ipic");
 135         if (!np)
 136                 return;
 137
 138         ipic_init(np, 0);
 139
 140         /* Initialize the default interrupt mapping priorities,
 141          * in case the boot rom changed something on us.
 142          */
 143         ipic_set_default_priority();
 144         of_node_put(np);
 145
 146 #ifdef CONFIG_QUICC_ENGINE
 147         np = of_find_node_by_type(NULL, "qeic");
 148         if (!np)
 149                 return;
 150
 151         qe_ic_init(np, 0);
 152         of_node_put(np);
 153 #endif                          /* CONFIG_QUICC_ENGINE */
 154 }
 155
 156 #if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374)
 157 extern ulong ds1374_get_rtc_time(void);
 158 extern int ds1374_set_rtc_time(ulong);
 159
 160 static int __init mpc8360_rtc_hookup(void)
 161 {
 162         struct timespec tv;
 163
 164         if (!machine_is(mpc836x_mds))
 165                 return 0;
 166
 167         ppc_md.get_rtc_time = ds1374_get_rtc_time;
 168         ppc_md.set_rtc_time = ds1374_set_rtc_time;
 169
 170         tv.tv_nsec = 0;
 171         tv.tv_sec = (ppc_md.get_rtc_time) ();
 172         do_settimeofday(&tv);
 173
 174         return 0;
 175 }
 176
 177 late_initcall(mpc8360_rtc_hookup);
 178 #endif
 179
 180 /*
 181  * Called very early, MMU is off, device-tree isn't unflattened
 182  */
 183 static int __init mpc836x_mds_probe(void)
 184 {
 185         unsigned long root = of_get_flat_dt_root();
 186
 187         return of_flat_dt_is_compatible(root, "MPC836xMDS");
 188 }
 189
 190 define_machine(mpc836x_mds) {
 191         .name           = "MPC836x MDS",
 192         .probe          = mpc836x_mds_probe,
 193         .setup_arch     = mpc836x_mds_setup_arch,
 194         .init_IRQ       = mpc836x_mds_init_IRQ,
 195         .get_irq        = ipic_get_irq,
 196         .restart        = mpc83xx_restart,
 197         .time_init      = mpc83xx_time_init,
 198         .calibrate_decr = generic_calibrate_decr,
 199         .progress       = udbg_progress,
 200 };