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/system.h>
  26 #include <asm/time.h>
  27 #include <asm/machdep.h>
  28 #include <asm/pci-bridge.h>
  29 #include <mm/mmu_decl.h>
  30 #include <asm/prom.h>
  31 #include <asm/udbg.h>
  32 #include <asm/mpic.h>
  33 #include <asm/i8259.h>
  34 #include <asm/swiotlb.h>
  35
  36 #include <sysdev/fsl_soc.h>
  37 #include <sysdev/fsl_pci.h>
  38
  39 #undef DEBUG
  40
  41 #ifdef DEBUG
  42 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  43 #else
  44 #define DBG(fmt, args...)
  45 #endif
  46
  47 #ifdef CONFIG_PPC_I8259
  48 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
  49 {
  50         struct irq_chip *chip = get_irq_desc_chip(desc);
  51         unsigned int cascade_irq = i8259_irq();
  52
  53         if (cascade_irq != NO_IRQ) {
  54                 generic_handle_irq(cascade_irq);
  55         }
  56         chip->irq_eoi(&desc->irq_data);
  57 }
  58 #endif  /* CONFIG_PPC_I8259 */
  59
  60 void __init mpc85xx_ds_pic_init(void)
  61 {
  62         struct mpic *mpic;
  63         struct resource r;
  64         struct device_node *np;
  65 #ifdef CONFIG_PPC_I8259
  66         struct device_node *cascade_node = NULL;
  67         int cascade_irq;
  68 #endif
  69         unsigned long root = of_get_flat_dt_root();
  70
  71         np = of_find_node_by_type(NULL, "open-pic");
  72         if (np == NULL) {
  73                 printk(KERN_ERR "Could not find open-pic node\n");
  74                 return;
  75         }
  76
  77         if (of_address_to_resource(np, 0, &r)) {
  78                 printk(KERN_ERR "Failed to map mpic register space\n");
  79                 of_node_put(np);
  80                 return;
  81         }
  82
  83         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
  84                 mpic = mpic_alloc(np, r.start,
  85                         MPIC_PRIMARY |
  86                         MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
  87                         0, 256, " OpenPIC  ");
  88         } else {
  89                 mpic = mpic_alloc(np, r.start,
  90                           MPIC_PRIMARY | MPIC_WANTS_RESET |
  91                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
  92                           MPIC_SINGLE_DEST_CPU,
  93                         0, 256, " OpenPIC  ");
  94         }
  95
  96         BUG_ON(mpic == NULL);
  97         of_node_put(np);
  98
  99         mpic_init(mpic);
 100
 101 #ifdef CONFIG_PPC_I8259
 102         /* Initialize the i8259 controller */
 103         for_each_node_by_type(np, "interrupt-controller")
 104             if (of_device_is_compatible(np, "chrp,iic")) {
 105                 cascade_node = np;
 106                 break;
 107         }
 108
 109         if (cascade_node == NULL) {
 110                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
 111                 return;
 112         }
 113
 114         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
 115         if (cascade_irq == NO_IRQ) {
 116                 printk(KERN_ERR "Failed to map cascade interrupt\n");
 117                 return;
 118         }
 119
 120         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 121
 122         i8259_init(cascade_node, 0);
 123         of_node_put(cascade_node);
 124
 125         set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 126 #endif  /* CONFIG_PPC_I8259 */
 127 }
 128
 129 #ifdef CONFIG_PCI
 130 static int primary_phb_addr;
 131 extern int uli_exclude_device(struct pci_controller *hose,
 132                                 u_char bus, u_char devfn);
 133
 134 static int mpc85xx_exclude_device(struct pci_controller *hose,
 135                                    u_char bus, u_char devfn)
 136 {
 137         struct device_node* node;
 138         struct resource rsrc;
 139
 140         node = hose->dn;
 141         of_address_to_resource(node, 0, &rsrc);
 142
 143         if ((rsrc.start & 0xfffff) == primary_phb_addr) {
 144                 return uli_exclude_device(hose, bus, devfn);
 145         }
 146
 147         return PCIBIOS_SUCCESSFUL;
 148 }
 149 #endif  /* CONFIG_PCI */
 150
 151 /*
 152  * Setup the architecture
 153  */
 154 #ifdef CONFIG_SMP
 155 extern void __init mpc85xx_smp_init(void);
 156 #endif
 157 static void __init mpc85xx_ds_setup_arch(void)
 158 {
 159 #ifdef CONFIG_PCI
 160         struct device_node *np;
 161         struct pci_controller *hose;
 162 #endif
 163         dma_addr_t max = 0xffffffff;
 164
 165         if (ppc_md.progress)
 166                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 167
 168 #ifdef CONFIG_PCI
 169         for_each_node_by_type(np, "pci") {
 170                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 171                     of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
 172                     of_device_is_compatible(np, "fsl,p2020-pcie")) {
 173                         struct resource rsrc;
 174                         of_address_to_resource(np, 0, &rsrc);
 175                         if ((rsrc.start & 0xfffff) == primary_phb_addr)
 176                                 fsl_add_bridge(np, 1);
 177                         else
 178                                 fsl_add_bridge(np, 0);
 179
 180                         hose = pci_find_hose_for_OF_device(np);
 181                         max = min(max, hose->dma_window_base_cur +
 182                                         hose->dma_window_size);
 183                 }
 184         }
 185
 186         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 187 #endif
 188
 189 #ifdef CONFIG_SMP
 190         mpc85xx_smp_init();
 191 #endif
 192
 193 #ifdef CONFIG_SWIOTLB
 194         if (memblock_end_of_DRAM() > max) {
 195                 ppc_swiotlb_enable = 1;
 196                 set_pci_dma_ops(&swiotlb_dma_ops);
 197                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 198         }
 199 #endif
 200
 201         printk("MPC85xx DS board from Freescale Semiconductor\n");
 202 }
 203
 204 /*
 205  * Called very early, device-tree isn't unflattened
 206  */
 207 static int __init mpc8544_ds_probe(void)
 208 {
 209         unsigned long root = of_get_flat_dt_root();
 210
 211         if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
 212 #ifdef CONFIG_PCI
 213                 primary_phb_addr = 0xb000;
 214 #endif
 215                 return 1;
 216         }
 217
 218         return 0;
 219 }
 220
 221 static struct of_device_id __initdata mpc85xxds_ids[] = {
 222         { .type = "soc", },
 223         { .compatible = "soc", },
 224         { .compatible = "simple-bus", },
 225         { .compatible = "gianfar", },
 226         {},
 227 };
 228
 229 static int __init mpc85xxds_publish_devices(void)
 230 {
 231         return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
 232 }
 233 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
 234 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
 235 machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
 236
 237 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
 238 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
 239 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
 240
 241 /*
 242  * Called very early, device-tree isn't unflattened
 243  */
 244 static int __init mpc8572_ds_probe(void)
 245 {
 246         unsigned long root = of_get_flat_dt_root();
 247
 248         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
 249 #ifdef CONFIG_PCI
 250                 primary_phb_addr = 0x8000;
 251 #endif
 252                 return 1;
 253         }
 254
 255         return 0;
 256 }
 257
 258 /*
 259  * Called very early, device-tree isn't unflattened
 260  */
 261 static int __init p2020_ds_probe(void)
 262 {
 263         unsigned long root = of_get_flat_dt_root();
 264
 265         if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
 266 #ifdef CONFIG_PCI
 267                 primary_phb_addr = 0x9000;
 268 #endif
 269                 return 1;
 270         }
 271
 272         return 0;
 273 }
 274
 275 define_machine(mpc8544_ds) {
 276         .name                   = "MPC8544 DS",
 277         .probe                  = mpc8544_ds_probe,
 278         .setup_arch             = mpc85xx_ds_setup_arch,
 279         .init_IRQ               = mpc85xx_ds_pic_init,
 280 #ifdef CONFIG_PCI
 281         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 282 #endif
 283         .get_irq                = mpic_get_irq,
 284         .restart                = fsl_rstcr_restart,
 285         .calibrate_decr         = generic_calibrate_decr,
 286         .progress               = udbg_progress,
 287 };
 288
 289 define_machine(mpc8572_ds) {
 290         .name                   = "MPC8572 DS",
 291         .probe                  = mpc8572_ds_probe,
 292         .setup_arch             = mpc85xx_ds_setup_arch,
 293         .init_IRQ               = mpc85xx_ds_pic_init,
 294 #ifdef CONFIG_PCI
 295         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 296 #endif
 297         .get_irq                = mpic_get_irq,
 298         .restart                = fsl_rstcr_restart,
 299         .calibrate_decr         = generic_calibrate_decr,
 300         .progress               = udbg_progress,
 301 };
 302
 303 define_machine(p2020_ds) {
 304         .name                   = "P2020 DS",
 305         .probe                  = p2020_ds_probe,
 306         .setup_arch             = mpc85xx_ds_setup_arch,
 307         .init_IRQ               = mpc85xx_ds_pic_init,
 308 #ifdef CONFIG_PCI
 309         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 310 #endif
 311         .get_irq                = mpic_get_irq,
 312         .restart                = fsl_rstcr_restart,
 313         .calibrate_decr         = generic_calibrate_decr,
 314         .progress               = udbg_progress,
 315 };