1/* 2 * MPC86xx HPCN board specific routines 3 * 4 * Recode: ZHANG WEI <wei.zhang@freescale.com> 5 * Initial author: Xianghua Xiao <x.xiao@freescale.com> 6 * 7 * Copyright 2006 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/of_platform.h> 22 23#include <asm/time.h> 24#include <asm/machdep.h> 25#include <asm/pci-bridge.h> 26#include <asm/prom.h> 27#include <mm/mmu_decl.h> 28#include <asm/udbg.h> 29#include <asm/swiotlb.h> 30 31#include <asm/mpic.h> 32 33#include <sysdev/fsl_pci.h> 34#include <sysdev/fsl_soc.h> 35 36#include "mpc86xx.h" 37 38#undef DEBUG 39 40#ifdef DEBUG 41#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0) 42#else 43#define DBG(fmt...) do { } while(0) 44#endif 45 46#ifdef CONFIG_PCI 47extern int uli_exclude_device(struct pci_controller *hose, 48 u_char bus, u_char devfn); 49 50static int mpc86xx_exclude_device(struct pci_controller *hose, 51 u_char bus, u_char devfn) 52{ 53 if (hose->dn == fsl_pci_primary) 54 return uli_exclude_device(hose, bus, devfn); 55 56 return PCIBIOS_SUCCESSFUL; 57} 58#endif /* CONFIG_PCI */ 59 60 61static void __init 62mpc86xx_hpcn_setup_arch(void) 63{ 64 if (ppc_md.progress) 65 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0); 66 67#ifdef CONFIG_PCI 68 ppc_md.pci_exclude_device = mpc86xx_exclude_device; 69#endif 70 71 printk("MPC86xx HPCN board from Freescale Semiconductor\n"); 72 73#ifdef CONFIG_SMP 74 mpc86xx_smp_init(); 75#endif 76 77 fsl_pci_assign_primary(); 78 79 swiotlb_detect_4g(); 80} 81 82 83static void 84mpc86xx_hpcn_show_cpuinfo(struct seq_file *m) 85{ 86 uint svid = mfspr(SPRN_SVR); 87 88 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n"); 89 90 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 91} 92 93 94/* 95 * Called very early, device-tree isn't unflattened 96 */ 97static int __init mpc86xx_hpcn_probe(void) 98{ 99 unsigned long root = of_get_flat_dt_root(); 100 101 if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn")) 102 return 1; /* Looks good */ 103 104 /* Be nice and don't give silent boot death. Delete this in 2.6.27 */ 105 if (of_flat_dt_is_compatible(root, "mpc86xx")) { 106 pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n"); 107 return 1; 108 } 109 110 return 0; 111} 112 113static long __init 114mpc86xx_time_init(void) 115{ 116 unsigned int temp; 117 118 /* Set the time base to zero */ 119 mtspr(SPRN_TBWL, 0); 120 mtspr(SPRN_TBWU, 0); 121 122 temp = mfspr(SPRN_HID0); 123 temp |= HID0_TBEN; 124 mtspr(SPRN_HID0, temp); 125 asm volatile("isync"); 126 127 return 0; 128} 129 130static const struct of_device_id of_bus_ids[] __initconst = { 131 { .compatible = "simple-bus", }, 132 { .compatible = "fsl,srio", }, 133 { .compatible = "gianfar", }, 134 { .compatible = "fsl,mpc8641-pcie", }, 135 {}, 136}; 137 138static int __init declare_of_platform_devices(void) 139{ 140 of_platform_bus_probe(NULL, of_bus_ids, NULL); 141 142 return 0; 143} 144machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices); 145machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier); 146 147define_machine(mpc86xx_hpcn) { 148 .name = "MPC86xx HPCN", 149 .probe = mpc86xx_hpcn_probe, 150 .setup_arch = mpc86xx_hpcn_setup_arch, 151 .init_IRQ = mpc86xx_init_irq, 152 .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo, 153 .get_irq = mpic_get_irq, 154 .restart = fsl_rstcr_restart, 155 .time_init = mpc86xx_time_init, 156 .calibrate_decr = generic_calibrate_decr, 157 .progress = udbg_progress, 158#ifdef CONFIG_PCI 159 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 160#endif 161}; 162