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 != NO_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         unsigned long root = of_get_flat_dt_root();
  70
  71         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
  72                 mpic = mpic_alloc(NULL, 0,
  73                         MPIC_NO_RESET |
  74                         MPIC_BIG_ENDIAN |
  75                         MPIC_SINGLE_DEST_CPU,
  76                         0, 256, " OpenPIC  ");
  77         } else {
  78                 mpic = mpic_alloc(NULL, 0,
  79                           MPIC_BIG_ENDIAN |
  80                           MPIC_SINGLE_DEST_CPU,
  81                         0, 256, " OpenPIC  ");
  82         }
  83
  84         BUG_ON(mpic == NULL);
  85         mpic_init(mpic);
  86
  87 #ifdef CONFIG_PPC_I8259
  88         /* Initialize the i8259 controller */
  89         for_each_node_by_type(np, "interrupt-controller")
  90             if (of_device_is_compatible(np, "chrp,iic")) {
  91                 cascade_node = np;
  92                 break;
  93         }
  94
  95         if (cascade_node == NULL) {
  96                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
  97                 return;
  98         }
  99
 100         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
 101         if (cascade_irq == NO_IRQ) {
 102                 printk(KERN_ERR "Failed to map cascade interrupt\n");
 103                 return;
 104         }
 105
 106         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 107
 108         i8259_init(cascade_node, 0);
 109         of_node_put(cascade_node);
 110
 111         irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 112 #endif  /* CONFIG_PPC_I8259 */
 113 }
 114
 115 #ifdef CONFIG_PCI
 116 extern int uli_exclude_device(struct pci_controller *hose,
 117                                 u_char bus, u_char devfn);
 118
 119 static struct device_node *pci_with_uli;
 120
 121 static int mpc85xx_exclude_device(struct pci_controller *hose,
 122                                    u_char bus, u_char devfn)
 123 {
 124         if (hose->dn == pci_with_uli)
 125                 return uli_exclude_device(hose, bus, devfn);
 126
 127         return PCIBIOS_SUCCESSFUL;
 128 }
 129 #endif  /* CONFIG_PCI */
 130
 131 static void __init mpc85xx_ds_uli_init(void)
 132 {
 133 #ifdef CONFIG_PCI
 134         struct device_node *node;
 135
 136         /* See if we have a ULI under the primary */
 137
 138         node = of_find_node_by_name(NULL, "uli1575");
 139         while ((pci_with_uli = of_get_parent(node))) {
 140                 of_node_put(node);
 141                 node = pci_with_uli;
 142
 143                 if (pci_with_uli == fsl_pci_primary) {
 144                         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 145                         break;
 146                 }
 147         }
 148 #endif
 149 }
 150
 151 /*
 152  * Setup the architecture
 153  */
 154 static void __init mpc85xx_ds_setup_arch(void)
 155 {
 156         if (ppc_md.progress)
 157                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 158
 159         swiotlb_detect_4g();
 160         fsl_pci_assign_primary();
 161         mpc85xx_ds_uli_init();
 162         mpc85xx_smp_init();
 163
 164         printk("MPC85xx DS board from Freescale Semiconductor\n");
 165 }
 166
 167 /*
 168  * Called very early, device-tree isn't unflattened
 169  */
 170 static int __init mpc8544_ds_probe(void)
 171 {
 172         unsigned long root = of_get_flat_dt_root();
 173
 174         return !!of_flat_dt_is_compatible(root, "MPC8544DS");
 175 }
 176
 177 machine_arch_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
 178 machine_arch_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
 179 machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices);
 180
 181 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
 182 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
 183 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
 184
 185 /*
 186  * Called very early, device-tree isn't unflattened
 187  */
 188 static int __init mpc8572_ds_probe(void)
 189 {
 190         unsigned long root = of_get_flat_dt_root();
 191
 192         return !!of_flat_dt_is_compatible(root, "fsl,MPC8572DS");
 193 }
 194
 195 /*
 196  * Called very early, device-tree isn't unflattened
 197  */
 198 static int __init p2020_ds_probe(void)
 199 {
 200         unsigned long root = of_get_flat_dt_root();
 201
 202         return !!of_flat_dt_is_compatible(root, "fsl,P2020DS");
 203 }
 204
 205 define_machine(mpc8544_ds) {
 206         .name                   = "MPC8544 DS",
 207         .probe                  = mpc8544_ds_probe,
 208         .setup_arch             = mpc85xx_ds_setup_arch,
 209         .init_IRQ               = mpc85xx_ds_pic_init,
 210 #ifdef CONFIG_PCI
 211         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 212         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 213 #endif
 214         .get_irq                = mpic_get_irq,
 215         .restart                = fsl_rstcr_restart,
 216         .calibrate_decr         = generic_calibrate_decr,
 217         .progress               = udbg_progress,
 218 };
 219
 220 define_machine(mpc8572_ds) {
 221         .name                   = "MPC8572 DS",
 222         .probe                  = mpc8572_ds_probe,
 223         .setup_arch             = mpc85xx_ds_setup_arch,
 224         .init_IRQ               = mpc85xx_ds_pic_init,
 225 #ifdef CONFIG_PCI
 226         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 227         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 228 #endif
 229         .get_irq                = mpic_get_irq,
 230         .restart                = fsl_rstcr_restart,
 231         .calibrate_decr         = generic_calibrate_decr,
 232         .progress               = udbg_progress,
 233 };
 234
 235 define_machine(p2020_ds) {
 236         .name                   = "P2020 DS",
 237         .probe                  = p2020_ds_probe,
 238         .setup_arch             = mpc85xx_ds_setup_arch,
 239         .init_IRQ               = mpc85xx_ds_pic_init,
 240 #ifdef CONFIG_PCI
 241         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 242         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 243 #endif
 244         .get_irq                = mpic_get_irq,
 245         .restart                = fsl_rstcr_restart,
 246         .calibrate_decr         = generic_calibrate_decr,
 247         .progress               = udbg_progress,
 248 };