arch/powerpc/platforms/85xx/mpc85xx_ds.c

   1 /*
   2  * MPC85xx DS Board Setup
   3  *
   4  * Author Xianghua Xiao (x.xiao@freescale.com)
   5  * Roy Zang <tie-fei.zang@freescale.com>
   6  *      - Add PCI/PCI Exprees support
   7  * Copyright 2007 Freescale Semiconductor Inc.
   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/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/pci.h>
  18 #include <linux/kdev_t.h>
  19 #include <linux/delay.h>
  20 #include <linux/seq_file.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/of_platform.h>
  23
  24 #include <asm/time.h>
  25 #include <asm/machdep.h>
  26 #include <asm/pci-bridge.h>
  27 #include <mm/mmu_decl.h>
  28 #include <asm/prom.h>
  29 #include <asm/udbg.h>
  30 #include <asm/mpic.h>
  31 #include <asm/i8259.h>
  32 #include <asm/swiotlb.h>
  33
  34 #include <sysdev/fsl_soc.h>
  35 #include <sysdev/fsl_pci.h>
  36 #include "smp.h"
  37
  38 #include "mpc85xx.h"
  39
  40 #undef DEBUG
  41
  42 #ifdef DEBUG
  43 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  44 #else
  45 #define DBG(fmt, args...)
  46 #endif
  47
  48 #ifdef CONFIG_PPC_I8259
  49 static void mpc85xx_8259_cascade(struct irq_desc *desc)
  50 {
  51         struct irq_chip *chip = irq_desc_get_chip(desc);
  52         unsigned int cascade_irq = i8259_irq();
  53
  54         if (cascade_irq) {
  55                 generic_handle_irq(cascade_irq);
  56         }
  57         chip->irq_eoi(&desc->irq_data);
  58 }
  59 #endif  /* CONFIG_PPC_I8259 */
  60
  61 void __init mpc85xx_ds_pic_init(void)
  62 {
  63         struct mpic *mpic;
  64 #ifdef CONFIG_PPC_I8259
  65         struct device_node *np;
  66         struct device_node *cascade_node = NULL;
  67         int cascade_irq;
  68 #endif
  69         if (of_machine_is_compatible("fsl,MPC8572DS-CAMP")) {
  70                 mpic = mpic_alloc(NULL, 0,
  71                         MPIC_NO_RESET |
  72                         MPIC_BIG_ENDIAN |
  73                         MPIC_SINGLE_DEST_CPU,
  74                         0, 256, " OpenPIC  ");
  75         } else {
  76                 mpic = mpic_alloc(NULL, 0,
  77                           MPIC_BIG_ENDIAN |
  78                           MPIC_SINGLE_DEST_CPU,
  79                         0, 256, " OpenPIC  ");
  80         }
  81
  82         BUG_ON(mpic == NULL);
  83         mpic_init(mpic);
  84
  85 #ifdef CONFIG_PPC_I8259
  86         /* Initialize the i8259 controller */
  87         for_each_node_by_type(np, "interrupt-controller")
  88             if (of_device_is_compatible(np, "chrp,iic")) {
  89                 cascade_node = np;
  90                 break;
  91         }
  92
  93         if (cascade_node == NULL) {
  94                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
  95                 return;
  96         }
  97
  98         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
  99         if (!cascade_irq) {
 100                 printk(KERN_ERR "Failed to map cascade interrupt\n");
 101                 return;
 102         }
 103
 104         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 105
 106         i8259_init(cascade_node, 0);
 107         of_node_put(cascade_node);
 108
 109         irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 110 #endif  /* CONFIG_PPC_I8259 */
 111 }
 112
 113 #ifdef CONFIG_PCI
 114 extern int uli_exclude_device(struct pci_controller *hose,
 115                                 u_char bus, u_char devfn);
 116
 117 static struct device_node *pci_with_uli;
 118
 119 static int mpc85xx_exclude_device(struct pci_controller *hose,
 120                                    u_char bus, u_char devfn)
 121 {
 122         if (hose->dn == pci_with_uli)
 123                 return uli_exclude_device(hose, bus, devfn);
 124
 125         return PCIBIOS_SUCCESSFUL;
 126 }
 127 #endif  /* CONFIG_PCI */
 128
 129 static void __init mpc85xx_ds_uli_init(void)
 130 {
 131 #ifdef CONFIG_PCI
 132         struct device_node *node;
 133
 134         /* See if we have a ULI under the primary */
 135
 136         node = of_find_node_by_name(NULL, "uli1575");
 137         while ((pci_with_uli = of_get_parent(node))) {
 138                 of_node_put(node);
 139                 node = pci_with_uli;
 140
 141                 if (pci_with_uli == fsl_pci_primary) {
 142                         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 143                         break;
 144                 }
 145         }
 146 #endif
 147 }
 148
 149 /*
 150  * Setup the architecture
 151  */
 152 static void __init mpc85xx_ds_setup_arch(void)
 153 {
 154         if (ppc_md.progress)
 155                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 156
 157         swiotlb_detect_4g();
 158         fsl_pci_assign_primary();
 159         mpc85xx_ds_uli_init();
 160         mpc85xx_smp_init();
 161
 162         printk("MPC85xx DS board from Freescale Semiconductor\n");
 163 }
 164
 165 /*
 166  * Called very early, device-tree isn't unflattened
 167  */
 168 static int __init mpc8544_ds_probe(void)
 169 {
 170         return !!of_machine_is_compatible("MPC8544DS");
 171 }
 172
 173 machine_arch_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
 174 machine_arch_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
 175 machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices);
 176
 177 /*
 178  * Called very early, device-tree isn't unflattened
 179  */
 180 static int __init mpc8572_ds_probe(void)
 181 {
 182         return !!of_machine_is_compatible("fsl,MPC8572DS");
 183 }
 184
 185 /*
 186  * Called very early, device-tree isn't unflattened
 187  */
 188 static int __init p2020_ds_probe(void)
 189 {
 190         return !!of_machine_is_compatible("fsl,P2020DS");
 191 }
 192
 193 define_machine(mpc8544_ds) {
 194         .name                   = "MPC8544 DS",
 195         .probe                  = mpc8544_ds_probe,
 196         .setup_arch             = mpc85xx_ds_setup_arch,
 197         .init_IRQ               = mpc85xx_ds_pic_init,
 198 #ifdef CONFIG_PCI
 199         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 200         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 201 #endif
 202         .get_irq                = mpic_get_irq,
 203         .calibrate_decr         = generic_calibrate_decr,
 204         .progress               = udbg_progress,
 205 };
 206
 207 define_machine(mpc8572_ds) {
 208         .name                   = "MPC8572 DS",
 209         .probe                  = mpc8572_ds_probe,
 210         .setup_arch             = mpc85xx_ds_setup_arch,
 211         .init_IRQ               = mpc85xx_ds_pic_init,
 212 #ifdef CONFIG_PCI
 213         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 214         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 215 #endif
 216         .get_irq                = mpic_get_irq,
 217         .calibrate_decr         = generic_calibrate_decr,
 218         .progress               = udbg_progress,
 219 };
 220
 221 define_machine(p2020_ds) {
 222         .name                   = "P2020 DS",
 223         .probe                  = p2020_ds_probe,
 224         .setup_arch             = mpc85xx_ds_setup_arch,
 225         .init_IRQ               = mpc85xx_ds_pic_init,
 226 #ifdef CONFIG_PCI
 227         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 228         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 229 #endif
 230         .get_irq                = mpic_get_irq,
 231         .calibrate_decr         = generic_calibrate_decr,
 232         .progress               = udbg_progress,
 233 };