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/system.h>
  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
  34 #include <sysdev/fsl_soc.h>
  35 #include <sysdev/fsl_pci.h>
  36
  37 #undef DEBUG
  38
  39 #ifdef DEBUG
  40 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  41 #else
  42 #define DBG(fmt, args...)
  43 #endif
  44
  45 #ifdef CONFIG_PPC_I8259
  46 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
  47 {
  48         unsigned int cascade_irq = i8259_irq();
  49
  50         if (cascade_irq != NO_IRQ) {
  51                 generic_handle_irq(cascade_irq);
  52         }
  53         desc->chip->eoi(irq);
  54 }
  55 #endif  /* CONFIG_PPC_I8259 */
  56
  57 void __init mpc85xx_ds_pic_init(void)
  58 {
  59         struct mpic *mpic;
  60         struct resource r;
  61         struct device_node *np;
  62 #ifdef CONFIG_PPC_I8259
  63         struct device_node *cascade_node = NULL;
  64         int cascade_irq;
  65 #endif
  66         unsigned long root = of_get_flat_dt_root();
  67
  68         np = of_find_node_by_type(NULL, "open-pic");
  69         if (np == NULL) {
  70                 printk(KERN_ERR "Could not find open-pic node\n");
  71                 return;
  72         }
  73
  74         if (of_address_to_resource(np, 0, &r)) {
  75                 printk(KERN_ERR "Failed to map mpic register space\n");
  76                 of_node_put(np);
  77                 return;
  78         }
  79
  80         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
  81                 mpic = mpic_alloc(np, r.start,
  82                         MPIC_PRIMARY |
  83                         MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
  84                         0, 256, " OpenPIC  ");
  85         } else {
  86                 mpic = mpic_alloc(np, r.start,
  87                           MPIC_PRIMARY | MPIC_WANTS_RESET |
  88                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
  89                           MPIC_SINGLE_DEST_CPU,
  90                         0, 256, " OpenPIC  ");
  91         }
  92
  93         BUG_ON(mpic == NULL);
  94         of_node_put(np);
  95
  96         mpic_init(mpic);
  97
  98 #ifdef CONFIG_PPC_I8259
  99         /* Initialize the i8259 controller */
 100         for_each_node_by_type(np, "interrupt-controller")
 101             if (of_device_is_compatible(np, "chrp,iic")) {
 102                 cascade_node = np;
 103                 break;
 104         }
 105
 106         if (cascade_node == NULL) {
 107                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
 108                 return;
 109         }
 110
 111         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
 112         if (cascade_irq == NO_IRQ) {
 113                 printk(KERN_ERR "Failed to map cascade interrupt\n");
 114                 return;
 115         }
 116
 117         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 118
 119         i8259_init(cascade_node, 0);
 120         of_node_put(cascade_node);
 121
 122         set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 123 #endif  /* CONFIG_PPC_I8259 */
 124 }
 125
 126 #ifdef CONFIG_PCI
 127 static int primary_phb_addr;
 128 extern int uli_exclude_device(struct pci_controller *hose,
 129                                 u_char bus, u_char devfn);
 130
 131 static int mpc85xx_exclude_device(struct pci_controller *hose,
 132                                    u_char bus, u_char devfn)
 133 {
 134         struct device_node* node;
 135         struct resource rsrc;
 136
 137         node = hose->dn;
 138         of_address_to_resource(node, 0, &rsrc);
 139
 140         if ((rsrc.start & 0xfffff) == primary_phb_addr) {
 141                 return uli_exclude_device(hose, bus, devfn);
 142         }
 143
 144         return PCIBIOS_SUCCESSFUL;
 145 }
 146 #endif  /* CONFIG_PCI */
 147
 148 /*
 149  * Setup the architecture
 150  */
 151 #ifdef CONFIG_SMP
 152 extern void __init mpc85xx_smp_init(void);
 153 #endif
 154 static void __init mpc85xx_ds_setup_arch(void)
 155 {
 156 #ifdef CONFIG_PCI
 157         struct device_node *np;
 158 #endif
 159
 160         if (ppc_md.progress)
 161                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 162
 163 #ifdef CONFIG_PCI
 164         for_each_node_by_type(np, "pci") {
 165                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 166                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 167                         struct resource rsrc;
 168                         of_address_to_resource(np, 0, &rsrc);
 169                         if ((rsrc.start & 0xfffff) == primary_phb_addr)
 170                                 fsl_add_bridge(np, 1);
 171                         else
 172                                 fsl_add_bridge(np, 0);
 173                 }
 174         }
 175
 176         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 177 #endif
 178
 179 #ifdef CONFIG_SMP
 180         mpc85xx_smp_init();
 181 #endif
 182
 183         printk("MPC85xx DS board from Freescale Semiconductor\n");
 184 }
 185
 186 /*
 187  * Called very early, device-tree isn't unflattened
 188  */
 189 static int __init mpc8544_ds_probe(void)
 190 {
 191         unsigned long root = of_get_flat_dt_root();
 192
 193         if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
 194 #ifdef CONFIG_PCI
 195                 primary_phb_addr = 0xb000;
 196 #endif
 197                 return 1;
 198         } else {
 199                 return 0;
 200         }
 201 }
 202
 203 static struct of_device_id __initdata mpc85xxds_ids[] = {
 204         { .type = "soc", },
 205         { .compatible = "soc", },
 206         { .compatible = "simple-bus", },
 207         { .compatible = "gianfar", },
 208         {},
 209 };
 210
 211 static int __init mpc85xxds_publish_devices(void)
 212 {
 213         return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
 214 }
 215 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
 216 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
 217
 218 /*
 219  * Called very early, device-tree isn't unflattened
 220  */
 221 static int __init mpc8572_ds_probe(void)
 222 {
 223         unsigned long root = of_get_flat_dt_root();
 224
 225         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
 226 #ifdef CONFIG_PCI
 227                 primary_phb_addr = 0x8000;
 228 #endif
 229                 return 1;
 230         } else {
 231                 return 0;
 232         }
 233 }
 234
 235 define_machine(mpc8544_ds) {
 236         .name                   = "MPC8544 DS",
 237         .probe                  = mpc8544_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 #endif
 243         .get_irq                = mpic_get_irq,
 244         .restart                = fsl_rstcr_restart,
 245         .calibrate_decr         = generic_calibrate_decr,
 246         .progress               = udbg_progress,
 247 };
 248
 249 define_machine(mpc8572_ds) {
 250         .name                   = "MPC8572 DS",
 251         .probe                  = mpc8572_ds_probe,
 252         .setup_arch             = mpc85xx_ds_setup_arch,
 253         .init_IRQ               = mpc85xx_ds_pic_init,
 254 #ifdef CONFIG_PCI
 255         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 256 #endif
 257         .get_irq                = mpic_get_irq,
 258         .restart                = fsl_rstcr_restart,
 259         .calibrate_decr         = generic_calibrate_decr,
 260         .progress               = udbg_progress,
 261 };