1/* 2 * Freescale Lite5200 board support 3 * 4 * Written by: Grant Likely <grant.likely@secretlab.ca> 5 * 6 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved. 7 * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved. 8 * 9 * Description: 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 */ 15 16#undef DEBUG 17 18#include <linux/stddef.h> 19#include <linux/kernel.h> 20#include <linux/init.h> 21#include <linux/errno.h> 22#include <linux/reboot.h> 23#include <linux/pci.h> 24#include <linux/kdev_t.h> 25#include <linux/major.h> 26#include <linux/console.h> 27#include <linux/delay.h> 28#include <linux/seq_file.h> 29#include <linux/root_dev.h> 30#include <linux/initrd.h> 31 32#include <asm/system.h> 33#include <asm/atomic.h> 34#include <asm/time.h> 35#include <asm/io.h> 36#include <asm/machdep.h> 37#include <asm/ipic.h> 38#include <asm/bootinfo.h> 39#include <asm/irq.h> 40#include <asm/prom.h> 41#include <asm/udbg.h> 42#include <sysdev/fsl_soc.h> 43#include <asm/of_platform.h> 44 45#include <asm/mpc52xx.h> 46 47/* ************************************************************************ 48 * 49 * Setup the architecture 50 * 51 */ 52 53static void __init 54lite5200_setup_cpu(void) 55{ 56 struct mpc52xx_gpio __iomem *gpio; 57 u32 port_config; 58 59 /* Map zones */ 60 gpio = mpc52xx_find_and_map("mpc5200-gpio"); 61 if (!gpio) { 62 printk(KERN_ERR __FILE__ ": " 63 "Error while mapping GPIO register for port config. " 64 "Expect some abnormal behavior\n"); 65 goto error; 66 } 67 68 /* Set port config */ 69 port_config = in_be32(&gpio->port_config); 70 71 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ 72 73 port_config &= ~0x00007000; /* USB port : Differential mode */ 74 port_config |= 0x00001000; /* USB 1 only */ 75 76 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ 77 port_config |= 0x01000000; 78 79 pr_debug("port_config: old:%x new:%x\n", 80 in_be32(&gpio->port_config), port_config); 81 out_be32(&gpio->port_config, port_config); 82 83 /* Unmap zone */ 84error: 85 iounmap(gpio); 86} 87 88#ifdef CONFIG_PM 89static u32 descr_a; 90static void lite5200_suspend_prepare(void __iomem *mbar) 91{ 92 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ 93 u8 level = 0; /* wakeup on low level */ 94 mpc52xx_set_wakeup_gpio(pin, level); 95 96 /* 97 * power down usb port 98 * this needs to be called before of-ohci suspend code 99 */ 100 descr_a = in_be32(mbar + 0x1048); 101 out_be32(mbar + 0x1048, (descr_a & ~0x200) | 0x100); 102} 103 104static void lite5200_resume_finish(void __iomem *mbar) 105{ 106 out_be32(mbar + 0x1048, descr_a); 107} 108#endif 109 110static void __init lite5200_setup_arch(void) 111{ 112 struct device_node *np; 113 114 if (ppc_md.progress) 115 ppc_md.progress("lite5200_setup_arch()", 0); 116 117 np = of_find_node_by_type(NULL, "cpu"); 118 if (np) { 119 const unsigned int *fp = 120 of_get_property(np, "clock-frequency", NULL); 121 if (fp != 0) 122 loops_per_jiffy = *fp / HZ; 123 else 124 loops_per_jiffy = 50000000 / HZ; 125 of_node_put(np); 126 } 127 128 /* CPU & Port mux setup */ 129 mpc52xx_setup_cpu(); /* Generic */ 130 lite5200_setup_cpu(); /* Platorm specific */ 131 132#ifdef CONFIG_PM 133 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; 134 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; 135 mpc52xx_pm_init(); 136#endif 137 138#ifdef CONFIG_PCI 139 np = of_find_node_by_type(NULL, "pci"); 140 if (np) { 141 mpc52xx_add_bridge(np); 142 of_node_put(np); 143 } 144#endif 145 146#ifdef CONFIG_BLK_DEV_INITRD 147 if (initrd_start) 148 ROOT_DEV = Root_RAM0; 149 else 150#endif 151#ifdef CONFIG_ROOT_NFS 152 ROOT_DEV = Root_NFS; 153#else 154 ROOT_DEV = Root_HDA1; 155#endif 156 157} 158 159void lite5200_show_cpuinfo(struct seq_file *m) 160{ 161 struct device_node* np = of_find_all_nodes(NULL); 162 const char *model = NULL; 163 164 if (np) 165 model = of_get_property(np, "model", NULL); 166 167 seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); 168 seq_printf(m, "machine\t\t: %s\n", model ? model : "unknown"); 169 170 of_node_put(np); 171} 172 173/* 174 * Called very early, MMU is off, device-tree isn't unflattened 175 */ 176static int __init lite5200_probe(void) 177{ 178 unsigned long node = of_get_flat_dt_root(); 179 const char *model = of_get_flat_dt_prop(node, "model", NULL); 180 181 if (!of_flat_dt_is_compatible(node, "fsl,lite5200") && 182 !of_flat_dt_is_compatible(node, "fsl,lite5200b")) 183 return 0; 184 pr_debug("%s board found\n", model ? model : "unknown"); 185 186 return 1; 187} 188 189define_machine(lite5200) { 190 .name = "lite5200", 191 .probe = lite5200_probe, 192 .setup_arch = lite5200_setup_arch, 193 .init = mpc52xx_declare_of_platform_devices, 194 .init_IRQ = mpc52xx_init_irq, 195 .get_irq = mpc52xx_get_irq, 196 .show_cpuinfo = lite5200_show_cpuinfo, 197 .calibrate_decr = generic_calibrate_decr, 198}; 199