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 67 np = of_find_node_by_type(NULL, "open-pic"); 68 if (np == NULL) { 69 printk(KERN_ERR "Could not find open-pic node\n"); 70 return; 71 } 72 73 if (of_address_to_resource(np, 0, &r)) { 74 printk(KERN_ERR "Failed to map mpic register space\n"); 75 of_node_put(np); 76 return; 77 } 78 79 mpic = mpic_alloc(np, r.start, 80 MPIC_PRIMARY | MPIC_WANTS_RESET | 81 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS | 82 MPIC_SINGLE_DEST_CPU, 83 0, 256, " OpenPIC "); 84 BUG_ON(mpic == NULL); 85 of_node_put(np); 86 87 mpic_init(mpic); 88 89 #ifdef CONFIG_PPC_I8259 90 /* Initialize the i8259 controller */ 91 for_each_node_by_type(np, "interrupt-controller") 92 if (of_device_is_compatible(np, "chrp,iic")) { 93 cascade_node = np; 94 break; 95 } 96 97 if (cascade_node == NULL) { 98 printk(KERN_DEBUG "Could not find i8259 PIC\n"); 99 return; 100 } 101 102 cascade_irq = irq_of_parse_and_map(cascade_node, 0); 103 if (cascade_irq == NO_IRQ) { 104 printk(KERN_ERR "Failed to map cascade interrupt\n"); 105 return; 106 } 107 108 DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq); 109 110 i8259_init(cascade_node, 0); 111 of_node_put(cascade_node); 112 113 set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade); 114 #endif /* CONFIG_PPC_I8259 */ 115 } 116 117 #ifdef CONFIG_PCI 118 static int primary_phb_addr; 119 extern int uli_exclude_device(struct pci_controller *hose, 120 u_char bus, u_char devfn); 121 122 static int mpc85xx_exclude_device(struct pci_controller *hose, 123 u_char bus, u_char devfn) 124 { 125 struct device_node* node; 126 struct resource rsrc; 127 128 node = hose->dn; 129 of_address_to_resource(node, 0, &rsrc); 130 131 if ((rsrc.start & 0xfffff) == primary_phb_addr) { 132 return uli_exclude_device(hose, bus, devfn); 133 } 134 135 return PCIBIOS_SUCCESSFUL; 136 } 137 #endif /* CONFIG_PCI */ 138 139 /* 140 * Setup the architecture 141 */ 142 static void __init mpc85xx_ds_setup_arch(void) 143 { 144 #ifdef CONFIG_PCI 145 struct device_node *np; 146 #endif 147 148 if (ppc_md.progress) 149 ppc_md.progress("mpc85xx_ds_setup_arch()", 0); 150 151 #ifdef CONFIG_PCI 152 for_each_node_by_type(np, "pci") { 153 if (of_device_is_compatible(np, "fsl,mpc8540-pci") || 154 of_device_is_compatible(np, "fsl,mpc8548-pcie")) { 155 struct resource rsrc; 156 of_address_to_resource(np, 0, &rsrc); 157 if ((rsrc.start & 0xfffff) == primary_phb_addr) 158 fsl_add_bridge(np, 1); 159 else 160 fsl_add_bridge(np, 0); 161 } 162 } 163 164 ppc_md.pci_exclude_device = mpc85xx_exclude_device; 165 #endif 166 167 printk("MPC85xx DS board from Freescale Semiconductor\n"); 168 } 169 170 /* 171 * Called very early, device-tree isn't unflattened 172 */ 173 static int __init mpc8544_ds_probe(void) 174 { 175 unsigned long root = of_get_flat_dt_root(); 176 177 if (of_flat_dt_is_compatible(root, "MPC8544DS")) { 178 #ifdef CONFIG_PCI 179 primary_phb_addr = 0xb000; 180 #endif 181 return 1; 182 } else { 183 return 0; 184 } 185 } 186 187 static struct of_device_id __initdata mpc85xxds_ids[] = { 188 { .type = "soc", }, 189 { .compatible = "soc", }, 190 { .compatible = "simple-bus", }, 191 {}, 192 }; 193 194 static int __init mpc85xxds_publish_devices(void) 195 { 196 return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL); 197 } 198 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices); 199 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices); 200 201 /* 202 * Called very early, device-tree isn't unflattened 203 */ 204 static int __init mpc8572_ds_probe(void) 205 { 206 unsigned long root = of_get_flat_dt_root(); 207 208 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) { 209 #ifdef CONFIG_PCI 210 primary_phb_addr = 0x8000; 211 #endif 212 return 1; 213 } else { 214 return 0; 215 } 216 } 217 218 define_machine(mpc8544_ds) { 219 .name = "MPC8544 DS", 220 .probe = mpc8544_ds_probe, 221 .setup_arch = mpc85xx_ds_setup_arch, 222 .init_IRQ = mpc85xx_ds_pic_init, 223 #ifdef CONFIG_PCI 224 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 225 #endif 226 .get_irq = mpic_get_irq, 227 .restart = fsl_rstcr_restart, 228 .calibrate_decr = generic_calibrate_decr, 229 .progress = udbg_progress, 230 }; 231 232 define_machine(mpc8572_ds) { 233 .name = "MPC8572 DS", 234 .probe = mpc8572_ds_probe, 235 .setup_arch = mpc85xx_ds_setup_arch, 236 .init_IRQ = mpc85xx_ds_pic_init, 237 #ifdef CONFIG_PCI 238 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 239 #endif 240 .get_irq = mpic_get_irq, 241 .restart = fsl_rstcr_restart, 242 .calibrate_decr = generic_calibrate_decr, 243 .progress = udbg_progress, 244 }; 245