1/* 2 * arch/powerpc/platforms/83xx/mpc834x_mds.c 3 * 4 * MPC834x MDS board specific routines 5 * 6 * Maintainer: Kumar Gala <galak@kernel.crashing.org> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14#include <linux/stddef.h> 15#include <linux/kernel.h> 16#include <linux/init.h> 17#include <linux/errno.h> 18#include <linux/reboot.h> 19#include <linux/pci.h> 20#include <linux/kdev_t.h> 21#include <linux/major.h> 22#include <linux/console.h> 23#include <linux/delay.h> 24#include <linux/seq_file.h> 25#include <linux/root_dev.h> 26#include <linux/of_platform.h> 27 28#include <asm/system.h> 29#include <asm/atomic.h> 30#include <asm/time.h> 31#include <asm/io.h> 32#include <asm/machdep.h> 33#include <asm/ipic.h> 34#include <asm/irq.h> 35#include <asm/prom.h> 36#include <asm/udbg.h> 37#include <sysdev/fsl_soc.h> 38#include <sysdev/fsl_pci.h> 39 40#include "mpc83xx.h" 41 42#define BCSR5_INT_USB 0x02 43static int mpc834xemds_usb_cfg(void) 44{ 45 struct device_node *np; 46 void __iomem *bcsr_regs = NULL; 47 u8 bcsr5; 48 49 mpc834x_usb_cfg(); 50 /* Map BCSR area */ 51 np = of_find_node_by_name(NULL, "bcsr"); 52 if (np) { 53 struct resource res; 54 55 of_address_to_resource(np, 0, &res); 56 bcsr_regs = ioremap(res.start, res.end - res.start + 1); 57 of_node_put(np); 58 } 59 if (!bcsr_regs) 60 return -1; 61 62 /* 63 * if Processor Board is plugged into PIB board, 64 * force to use the PHY on Processor Board 65 */ 66 bcsr5 = in_8(bcsr_regs + 5); 67 if (!(bcsr5 & BCSR5_INT_USB)) 68 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB)); 69 iounmap(bcsr_regs); 70 return 0; 71} 72 73/* ************************************************************************ 74 * 75 * Setup the architecture 76 * 77 */ 78static void __init mpc834x_mds_setup_arch(void) 79{ 80#ifdef CONFIG_PCI 81 struct device_node *np; 82#endif 83 84 if (ppc_md.progress) 85 ppc_md.progress("mpc834x_mds_setup_arch()", 0); 86 87#ifdef CONFIG_PCI 88 for_each_compatible_node(np, "pci", "fsl,mpc8349-pci") 89 mpc83xx_add_bridge(np); 90#endif 91 92 mpc834xemds_usb_cfg(); 93} 94 95static void __init mpc834x_mds_init_IRQ(void) 96{ 97 struct device_node *np; 98 99 np = of_find_node_by_type(NULL, "ipic"); 100 if (!np) 101 return; 102 103 ipic_init(np, 0); 104 105 /* Initialize the default interrupt mapping priorities, 106 * in case the boot rom changed something on us. 107 */ 108 ipic_set_default_priority(); 109} 110 111static struct of_device_id mpc834x_ids[] = { 112 { .type = "soc", }, 113 { .compatible = "soc", }, 114 { .compatible = "simple-bus", }, 115 { .compatible = "gianfar", }, 116 {}, 117}; 118 119static int __init mpc834x_declare_of_platform_devices(void) 120{ 121 of_platform_bus_probe(NULL, mpc834x_ids, NULL); 122 return 0; 123} 124machine_device_initcall(mpc834x_mds, mpc834x_declare_of_platform_devices); 125 126/* 127 * Called very early, MMU is off, device-tree isn't unflattened 128 */ 129static int __init mpc834x_mds_probe(void) 130{ 131 unsigned long root = of_get_flat_dt_root(); 132 133 return of_flat_dt_is_compatible(root, "MPC834xMDS"); 134} 135 136define_machine(mpc834x_mds) { 137 .name = "MPC834x MDS", 138 .probe = mpc834x_mds_probe, 139 .setup_arch = mpc834x_mds_setup_arch, 140 .init_IRQ = mpc834x_mds_init_IRQ, 141 .get_irq = ipic_get_irq, 142 .restart = mpc83xx_restart, 143 .time_init = mpc83xx_time_init, 144 .calibrate_decr = generic_calibrate_decr, 145 .progress = udbg_progress, 146}; 147