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 0, 256, " OpenPIC "); 83 BUG_ON(mpic == NULL); 84 of_node_put(np); 85 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 set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade); 113 #endif /* CONFIG_PPC_I8259 */ 114 } 115 116 #ifdef CONFIG_PCI 117 static int primary_phb_addr; 118 extern int uli_exclude_device(struct pci_controller *hose, 119 u_char bus, u_char devfn); 120 121 static int mpc85xx_exclude_device(struct pci_controller *hose, 122 u_char bus, u_char devfn) 123 { 124 struct device_node* node; 125 struct resource rsrc; 126 127 node = hose->dn; 128 of_address_to_resource(node, 0, &rsrc); 129 130 if ((rsrc.start & 0xfffff) == primary_phb_addr) { 131 return uli_exclude_device(hose, bus, devfn); 132 } 133 134 return PCIBIOS_SUCCESSFUL; 135 } 136 #endif /* CONFIG_PCI */ 137 138 /* 139 * Setup the architecture 140 */ 141 static void __init mpc85xx_ds_setup_arch(void) 142 { 143 #ifdef CONFIG_PCI 144 struct device_node *np; 145 #endif 146 147 if (ppc_md.progress) 148 ppc_md.progress("mpc85xx_ds_setup_arch()", 0); 149 150 #ifdef CONFIG_PCI 151 for_each_node_by_type(np, "pci") { 152 if (of_device_is_compatible(np, "fsl,mpc8540-pci") || 153 of_device_is_compatible(np, "fsl,mpc8548-pcie")) { 154 struct resource rsrc; 155 of_address_to_resource(np, 0, &rsrc); 156 if ((rsrc.start & 0xfffff) == primary_phb_addr) 157 fsl_add_bridge(np, 1); 158 else 159 fsl_add_bridge(np, 0); 160 } 161 } 162 163 ppc_md.pci_exclude_device = mpc85xx_exclude_device; 164 #endif 165 166 printk("MPC85xx DS board from Freescale Semiconductor\n"); 167 } 168 169 /* 170 * Called very early, device-tree isn't unflattened 171 */ 172 static int __init mpc8544_ds_probe(void) 173 { 174 unsigned long root = of_get_flat_dt_root(); 175 176 if (of_flat_dt_is_compatible(root, "MPC8544DS")) { 177 #ifdef CONFIG_PCI 178 primary_phb_addr = 0xb000; 179 #endif 180 return 1; 181 } else { 182 return 0; 183 } 184 } 185 186 static struct of_device_id __initdata mpc85xxds_ids[] = { 187 { .type = "soc", }, 188 { .compatible = "soc", }, 189 { .compatible = "simple-bus", }, 190 {}, 191 }; 192 193 static int __init mpc85xxds_publish_devices(void) 194 { 195 return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL); 196 } 197 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices); 198 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices); 199 200 /* 201 * Called very early, device-tree isn't unflattened 202 */ 203 static int __init mpc8572_ds_probe(void) 204 { 205 unsigned long root = of_get_flat_dt_root(); 206 207 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) { 208 #ifdef CONFIG_PCI 209 primary_phb_addr = 0x8000; 210 #endif 211 return 1; 212 } else { 213 return 0; 214 } 215 } 216 217 define_machine(mpc8544_ds) { 218 .name = "MPC8544 DS", 219 .probe = mpc8544_ds_probe, 220 .setup_arch = mpc85xx_ds_setup_arch, 221 .init_IRQ = mpc85xx_ds_pic_init, 222 #ifdef CONFIG_PCI 223 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 224 #endif 225 .get_irq = mpic_get_irq, 226 .restart = fsl_rstcr_restart, 227 .calibrate_decr = generic_calibrate_decr, 228 .progress = udbg_progress, 229 }; 230 231 define_machine(mpc8572_ds) { 232 .name = "MPC8572 DS", 233 .probe = mpc8572_ds_probe, 234 .setup_arch = mpc85xx_ds_setup_arch, 235 .init_IRQ = mpc85xx_ds_pic_init, 236 #ifdef CONFIG_PCI 237 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 238 #endif 239 .get_irq = mpic_get_irq, 240 .restart = fsl_rstcr_restart, 241 .calibrate_decr = generic_calibrate_decr, 242 .progress = udbg_progress, 243 }; 244