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 27#include <asm/system.h> 28#include <asm/atomic.h> 29#include <asm/time.h> 30#include <asm/io.h> 31#include <asm/machdep.h> 32#include <asm/ipic.h> 33#include <asm/bootinfo.h> 34#include <asm/irq.h> 35#include <asm/prom.h> 36#include <asm/udbg.h> 37#include <sysdev/fsl_soc.h> 38 39#include "mpc83xx.h" 40 41#ifndef CONFIG_PCI 42unsigned long isa_io_base = 0; 43unsigned long isa_mem_base = 0; 44#endif 45 46#define BCSR5_INT_USB 0x02 47/* Note: This is only for PB, not for PB+PIB 48 * On PB only port0 is connected using ULPI */ 49static int mpc834x_usb_cfg(void) 50{ 51 unsigned long sccr, sicrl; 52 void __iomem *immap; 53 void __iomem *bcsr_regs = NULL; 54 u8 bcsr5; 55 struct device_node *np = NULL; 56 int port0_is_dr = 0; 57 58 if ((np = of_find_compatible_node(NULL, "usb", "fsl-usb2-dr")) != NULL) 59 port0_is_dr = 1; 60 if ((np = of_find_compatible_node(NULL, "usb", "fsl-usb2-mph")) != NULL){ 61 if (port0_is_dr) { 62 printk(KERN_WARNING 63 "There is only one USB port on PB board! \n"); 64 return -1; 65 } else if (!port0_is_dr) 66 /* No usb port enabled */ 67 return -1; 68 } 69 70 immap = ioremap(get_immrbase(), 0x1000); 71 if (!immap) 72 return -1; 73 74 /* Configure clock */ 75 sccr = in_be32(immap + MPC83XX_SCCR_OFFS); 76 if (port0_is_dr) 77 sccr |= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */ 78 else 79 sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */ 80 out_be32(immap + MPC83XX_SCCR_OFFS, sccr); 81 82 /* Configure Pin */ 83 sicrl = in_be32(immap + MPC83XX_SICRL_OFFS); 84 /* set port0 only */ 85 if (port0_is_dr) 86 sicrl |= MPC83XX_SICRL_USB0; 87 else 88 sicrl &= ~(MPC83XX_SICRL_USB0); 89 out_be32(immap + MPC83XX_SICRL_OFFS, sicrl); 90 91 iounmap(immap); 92 93 /* Map BCSR area */ 94 np = of_find_node_by_name(NULL, "bcsr"); 95 if (np != 0) { 96 struct resource res; 97 98 of_address_to_resource(np, 0, &res); 99 bcsr_regs = ioremap(res.start, res.end - res.start + 1); 100 of_node_put(np); 101 } 102 if (!bcsr_regs) 103 return -1; 104 105 /* 106 * if Processor Board is plugged into PIB board, 107 * force to use the PHY on Processor Board 108 */ 109 bcsr5 = in_8(bcsr_regs + 5); 110 if (!(bcsr5 & BCSR5_INT_USB)) 111 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB)); 112 iounmap(bcsr_regs); 113 return 0; 114} 115 116/* ************************************************************************ 117 * 118 * Setup the architecture 119 * 120 */ 121static void __init mpc834x_mds_setup_arch(void) 122{ 123#ifdef CONFIG_PCI 124 struct device_node *np; 125#endif 126 127 if (ppc_md.progress) 128 ppc_md.progress("mpc834x_mds_setup_arch()", 0); 129 130#ifdef CONFIG_PCI 131 for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) 132 add_bridge(np); 133 134 ppc_md.pci_exclude_device = mpc83xx_exclude_device; 135#endif 136 137 mpc834x_usb_cfg(); 138} 139 140static void __init mpc834x_mds_init_IRQ(void) 141{ 142 struct device_node *np; 143 144 np = of_find_node_by_type(NULL, "ipic"); 145 if (!np) 146 return; 147 148 ipic_init(np, 0); 149 150 /* Initialize the default interrupt mapping priorities, 151 * in case the boot rom changed something on us. 152 */ 153 ipic_set_default_priority(); 154} 155 156#if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374) 157extern ulong ds1374_get_rtc_time(void); 158extern int ds1374_set_rtc_time(ulong); 159 160static int __init mpc834x_rtc_hookup(void) 161{ 162 struct timespec tv; 163 164 if (!machine_is(mpc834x_mds)) 165 return 0; 166 167 ppc_md.get_rtc_time = ds1374_get_rtc_time; 168 ppc_md.set_rtc_time = ds1374_set_rtc_time; 169 170 tv.tv_nsec = 0; 171 tv.tv_sec = (ppc_md.get_rtc_time) (); 172 do_settimeofday(&tv); 173 174 return 0; 175} 176 177late_initcall(mpc834x_rtc_hookup); 178#endif 179 180/* 181 * Called very early, MMU is off, device-tree isn't unflattened 182 */ 183static int __init mpc834x_mds_probe(void) 184{ 185 unsigned long root = of_get_flat_dt_root(); 186 187 return of_flat_dt_is_compatible(root, "MPC834xMDS"); 188} 189 190define_machine(mpc834x_mds) { 191 .name = "MPC834x MDS", 192 .probe = mpc834x_mds_probe, 193 .setup_arch = mpc834x_mds_setup_arch, 194 .init_IRQ = mpc834x_mds_init_IRQ, 195 .get_irq = ipic_get_irq, 196 .restart = mpc83xx_restart, 197 .time_init = mpc83xx_time_init, 198 .calibrate_decr = generic_calibrate_decr, 199 .progress = udbg_progress, 200}; 201