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 #include <linux/memblock.h>
  24
  25 #include <asm/time.h>
  26 #include <asm/machdep.h>
  27 #include <asm/pci-bridge.h>
  28 #include <mm/mmu_decl.h>
  29 #include <asm/prom.h>
  30 #include <asm/udbg.h>
  31 #include <asm/mpic.h>
  32 #include <asm/i8259.h>
  33 #include <asm/swiotlb.h>
  34
  35 #include <sysdev/fsl_soc.h>
  36 #include <sysdev/fsl_pci.h>
  37 #include "smp.h"
  38
  39 #include "mpc85xx.h"
  40
  41 #undef DEBUG
  42
  43 #ifdef DEBUG
  44 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  45 #else
  46 #define DBG(fmt, args...)
  47 #endif
  48
  49 #ifdef CONFIG_PPC_I8259
  50 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
  51 {
  52         struct irq_chip *chip = irq_desc_get_chip(desc);
  53         unsigned int cascade_irq = i8259_irq();
  54
  55         if (cascade_irq != NO_IRQ) {
  56                 generic_handle_irq(cascade_irq);
  57         }
  58         chip->irq_eoi(&desc->irq_data);
  59 }
  60 #endif  /* CONFIG_PPC_I8259 */
  61
  62 void __init mpc85xx_ds_pic_init(void)
  63 {
  64         struct mpic *mpic;
  65 #ifdef CONFIG_PPC_I8259
  66         struct device_node *np;
  67         struct device_node *cascade_node = NULL;
  68         int cascade_irq;
  69 #endif
  70         unsigned long root = of_get_flat_dt_root();
  71
  72         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
  73                 mpic = mpic_alloc(NULL, 0,
  74                         MPIC_NO_RESET |
  75                         MPIC_BIG_ENDIAN |
  76                         MPIC_SINGLE_DEST_CPU,
  77                         0, 256, " OpenPIC  ");
  78         } else {
  79                 mpic = mpic_alloc(NULL, 0,
  80                           MPIC_BIG_ENDIAN |
  81                           MPIC_SINGLE_DEST_CPU,
  82                         0, 256, " OpenPIC  ");
  83         }
  84
  85         BUG_ON(mpic == NULL);
  86         mpic_init(mpic);
  87
  88 #ifdef CONFIG_PPC_I8259
  89         /* Initialize the i8259 controller */
  90         for_each_node_by_type(np, "interrupt-controller")
  91             if (of_device_is_compatible(np, "chrp,iic")) {
  92                 cascade_node = np;
  93                 break;
  94         }
  95
  96         if (cascade_node == NULL) {
  97                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
  98                 return;
  99         }
 100
 101         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
 102         if (cascade_irq == NO_IRQ) {
 103                 printk(KERN_ERR "Failed to map cascade interrupt\n");
 104                 return;
 105         }
 106
 107         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 108
 109         i8259_init(cascade_node, 0);
 110         of_node_put(cascade_node);
 111
 112         irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 113 #endif  /* CONFIG_PPC_I8259 */
 114 }
 115
 116 #ifdef CONFIG_PCI
 117 extern int uli_exclude_device(struct pci_controller *hose,
 118                                 u_char bus, u_char devfn);
 119
 120 static struct device_node *pci_with_uli;
 121
 122 static int mpc85xx_exclude_device(struct pci_controller *hose,
 123                                    u_char bus, u_char devfn)
 124 {
 125         if (hose->dn == pci_with_uli)
 126                 return uli_exclude_device(hose, bus, devfn);
 127
 128         return PCIBIOS_SUCCESSFUL;
 129 }
 130 #endif  /* CONFIG_PCI */
 131
 132 static void __init mpc85xx_ds_pci_init(void)
 133 {
 134 #ifdef CONFIG_PCI
 135         struct device_node *node;
 136
 137         fsl_pci_init();
 138
 139         /* See if we have a ULI under the primary */
 140
 141         node = of_find_node_by_name(NULL, "uli1575");
 142         while ((pci_with_uli = of_get_parent(node))) {
 143                 of_node_put(node);
 144                 node = pci_with_uli;
 145
 146                 if (pci_with_uli == fsl_pci_primary) {
 147                         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 148                         break;
 149                 }
 150         }
 151 #endif
 152 }
 153
 154 /*
 155  * Setup the architecture
 156  */
 157 static void __init mpc85xx_ds_setup_arch(void)
 158 {
 159         if (ppc_md.progress)
 160                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 161
 162         mpc85xx_ds_pci_init();
 163         mpc85xx_smp_init();
 164
 165         printk("MPC85xx DS board from Freescale Semiconductor\n");
 166 }
 167
 168 /*
 169  * Called very early, device-tree isn't unflattened
 170  */
 171 static int __init mpc8544_ds_probe(void)
 172 {
 173         unsigned long root = of_get_flat_dt_root();
 174
 175         return !!of_flat_dt_is_compatible(root, "MPC8544DS");
 176 }
 177
 178 machine_device_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
 179 machine_device_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
 180 machine_device_initcall(p2020_ds, mpc85xx_common_publish_devices);
 181
 182 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
 183 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
 184 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
 185
 186 /*
 187  * Called very early, device-tree isn't unflattened
 188  */
 189 static int __init mpc8572_ds_probe(void)
 190 {
 191         unsigned long root = of_get_flat_dt_root();
 192
 193         return !!of_flat_dt_is_compatible(root, "fsl,MPC8572DS");
 194 }
 195
 196 /*
 197  * Called very early, device-tree isn't unflattened
 198  */
 199 static int __init p2020_ds_probe(void)
 200 {
 201         unsigned long root = of_get_flat_dt_root();
 202
 203         return !!of_flat_dt_is_compatible(root, "fsl,P2020DS");
 204 }
 205
 206 define_machine(mpc8544_ds) {
 207         .name                   = "MPC8544 DS",
 208         .probe                  = mpc8544_ds_probe,
 209         .setup_arch             = mpc85xx_ds_setup_arch,
 210         .init_IRQ               = mpc85xx_ds_pic_init,
 211 #ifdef CONFIG_PCI
 212         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 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 #endif
 228         .get_irq                = mpic_get_irq,
 229         .restart                = fsl_rstcr_restart,
 230         .calibrate_decr         = generic_calibrate_decr,
 231         .progress               = udbg_progress,
 232 };
 233
 234 define_machine(p2020_ds) {
 235         .name                   = "P2020 DS",
 236         .probe                  = p2020_ds_probe,
 237         .setup_arch             = mpc85xx_ds_setup_arch,
 238         .init_IRQ               = mpc85xx_ds_pic_init,
 239 #ifdef CONFIG_PCI
 240         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 241 #endif
 242         .get_irq                = mpic_get_irq,
 243         .restart                = fsl_rstcr_restart,
 244         .calibrate_decr         = generic_calibrate_decr,
 245         .progress               = udbg_progress,
 246 };