1/* 2 * Wind River SBC8548 setup and early boot code. 3 * 4 * Copyright 2007 Wind River Systems Inc. 5 * 6 * By Paul Gortmaker (see MAINTAINERS for contact information) 7 * 8 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc. 9 * 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 */ 16 17#include <linux/stddef.h> 18#include <linux/kernel.h> 19#include <linux/init.h> 20#include <linux/errno.h> 21#include <linux/reboot.h> 22#include <linux/pci.h> 23#include <linux/kdev_t.h> 24#include <linux/major.h> 25#include <linux/console.h> 26#include <linux/delay.h> 27#include <linux/seq_file.h> 28#include <linux/initrd.h> 29#include <linux/interrupt.h> 30#include <linux/fsl_devices.h> 31#include <linux/of_platform.h> 32 33#include <asm/pgtable.h> 34#include <asm/page.h> 35#include <linux/atomic.h> 36#include <asm/time.h> 37#include <asm/io.h> 38#include <asm/machdep.h> 39#include <asm/ipic.h> 40#include <asm/pci-bridge.h> 41#include <asm/irq.h> 42#include <mm/mmu_decl.h> 43#include <asm/prom.h> 44#include <asm/udbg.h> 45#include <asm/mpic.h> 46 47#include <sysdev/fsl_soc.h> 48#include <sysdev/fsl_pci.h> 49 50#include "mpc85xx.h" 51 52static int sbc_rev; 53 54static void __init sbc8548_pic_init(void) 55{ 56 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN, 57 0, 256, " OpenPIC "); 58 BUG_ON(mpic == NULL); 59 mpic_init(mpic); 60} 61 62/* Extract the HW Rev from the EPLD on the board */ 63static int __init sbc8548_hw_rev(void) 64{ 65 struct device_node *np; 66 struct resource res; 67 unsigned int *rev; 68 int board_rev = 0; 69 70 np = of_find_compatible_node(NULL, NULL, "hw-rev"); 71 if (np == NULL) { 72 printk("No HW-REV found in DTB.\n"); 73 return -ENODEV; 74 } 75 76 of_address_to_resource(np, 0, &res); 77 of_node_put(np); 78 79 rev = ioremap(res.start,sizeof(unsigned int)); 80 board_rev = (*rev) >> 28; 81 iounmap(rev); 82 83 return board_rev; 84} 85 86/* 87 * Setup the architecture 88 */ 89static void __init sbc8548_setup_arch(void) 90{ 91 if (ppc_md.progress) 92 ppc_md.progress("sbc8548_setup_arch()", 0); 93 94 fsl_pci_assign_primary(); 95 96 sbc_rev = sbc8548_hw_rev(); 97} 98 99static void sbc8548_show_cpuinfo(struct seq_file *m) 100{ 101 uint pvid, svid, phid1; 102 103 pvid = mfspr(SPRN_PVR); 104 svid = mfspr(SPRN_SVR); 105 106 seq_printf(m, "Vendor\t\t: Wind River\n"); 107 seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev); 108 seq_printf(m, "PVR\t\t: 0x%x\n", pvid); 109 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 110 111 /* Display cpu Pll setting */ 112 phid1 = mfspr(SPRN_HID1); 113 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f)); 114} 115 116machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices); 117 118/* 119 * Called very early, device-tree isn't unflattened 120 */ 121static int __init sbc8548_probe(void) 122{ 123 unsigned long root = of_get_flat_dt_root(); 124 125 return of_flat_dt_is_compatible(root, "SBC8548"); 126} 127 128define_machine(sbc8548) { 129 .name = "SBC8548", 130 .probe = sbc8548_probe, 131 .setup_arch = sbc8548_setup_arch, 132 .init_IRQ = sbc8548_pic_init, 133 .show_cpuinfo = sbc8548_show_cpuinfo, 134 .get_irq = mpic_get_irq, 135 .restart = fsl_rstcr_restart, 136#ifdef CONFIG_PCI 137 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 138 .pcibios_fixup_phb = fsl_pcibios_fixup_phb, 139#endif 140 .calibrate_decr = generic_calibrate_decr, 141 .progress = udbg_progress, 142}; 143