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 2006 Freescale Semiconductor, Inc. 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/init.h> 19 #include <linux/pci.h> 20 #include <linux/of.h> 21 #include <linux/of_address.h> 22 #include <linux/root_dev.h> 23 #include <linux/initrd.h> 24 #include <asm/time.h> 25 #include <asm/io.h> 26 #include <asm/machdep.h> 27 #include <asm/prom.h> 28 #include <asm/mpc52xx.h> 29 30 /* ************************************************************************ 31 * 32 * Setup the architecture 33 * 34 */ 35 36 /* mpc5200 device tree match tables */ 37 static const struct of_device_id mpc5200_cdm_ids[] __initconst = { 38 { .compatible = "fsl,mpc5200-cdm", }, 39 { .compatible = "mpc5200-cdm", }, 40 {} 41 }; 42 43 static const struct of_device_id mpc5200_gpio_ids[] __initconst = { 44 { .compatible = "fsl,mpc5200-gpio", }, 45 { .compatible = "mpc5200-gpio", }, 46 {} 47 }; 48 49 /* 50 * Fix clock configuration. 51 * 52 * Firmware is supposed to be responsible for this. If you are creating a 53 * new board port, do *NOT* duplicate this code. Fix your boot firmware 54 * to set it correctly in the first place 55 */ 56 static void __init 57 lite5200_fix_clock_config(void) 58 { 59 struct device_node *np; 60 struct mpc52xx_cdm __iomem *cdm; 61 /* Map zones */ 62 np = of_find_matching_node(NULL, mpc5200_cdm_ids); 63 cdm = of_iomap(np, 0); 64 of_node_put(np); 65 if (!cdm) { 66 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n", 67 __func__); 68 return; 69 } 70 71 /* Use internal 48 Mhz */ 72 out_8(&cdm->ext_48mhz_en, 0x00); 73 out_8(&cdm->fd_enable, 0x01); 74 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ 75 out_be16(&cdm->fd_counters, 0x0001); 76 else 77 out_be16(&cdm->fd_counters, 0x5555); 78 79 /* Unmap the regs */ 80 iounmap(cdm); 81 } 82 83 /* 84 * Fix setting of port_config register. 85 * 86 * Firmware is supposed to be responsible for this. If you are creating a 87 * new board port, do *NOT* duplicate this code. Fix your boot firmware 88 * to set it correctly in the first place 89 */ 90 static void __init 91 lite5200_fix_port_config(void) 92 { 93 struct device_node *np; 94 struct mpc52xx_gpio __iomem *gpio; 95 u32 port_config; 96 97 np = of_find_matching_node(NULL, mpc5200_gpio_ids); 98 gpio = of_iomap(np, 0); 99 of_node_put(np); 100 if (!gpio) { 101 printk(KERN_ERR "%s() failed. expect abnormal behavior\n", 102 __func__); 103 return; 104 } 105 106 /* Set port config */ 107 port_config = in_be32(&gpio->port_config); 108 109 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ 110 111 port_config &= ~0x00007000; /* USB port : Differential mode */ 112 port_config |= 0x00001000; /* USB 1 only */ 113 114 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ 115 port_config |= 0x01000000; 116 117 pr_debug("port_config: old:%x new:%x\n", 118 in_be32(&gpio->port_config), port_config); 119 out_be32(&gpio->port_config, port_config); 120 121 /* Unmap zone */ 122 iounmap(gpio); 123 } 124 125 #ifdef CONFIG_PM 126 static void lite5200_suspend_prepare(void __iomem *mbar) 127 { 128 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ 129 u8 level = 0; /* wakeup on low level */ 130 mpc52xx_set_wakeup_gpio(pin, level); 131 132 /* 133 * power down usb port 134 * this needs to be called before of-ohci suspend code 135 */ 136 137 /* set ports to "power switched" and "powered at the same time" 138 * USB Rh descriptor A: NPS = 0, PSM = 0 */ 139 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300); 140 /* USB Rh status: LPS = 1 - turn off power */ 141 out_be32(mbar + 0x1050, 0x00000001); 142 } 143 144 static void lite5200_resume_finish(void __iomem *mbar) 145 { 146 /* USB Rh status: LPSC = 1 - turn on power */ 147 out_be32(mbar + 0x1050, 0x00010000); 148 } 149 #endif 150 151 static void __init lite5200_setup_arch(void) 152 { 153 if (ppc_md.progress) 154 ppc_md.progress("lite5200_setup_arch()", 0); 155 156 /* Map important registers from the internal memory map */ 157 mpc52xx_map_common_devices(); 158 159 /* Some mpc5200 & mpc5200b related configuration */ 160 mpc5200_setup_xlb_arbiter(); 161 162 /* Fix things that firmware should have done. */ 163 lite5200_fix_clock_config(); 164 lite5200_fix_port_config(); 165 166 #ifdef CONFIG_PM 167 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; 168 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; 169 lite5200_pm_init(); 170 #endif 171 172 mpc52xx_setup_pci(); 173 } 174 175 static const char * const board[] __initconst = { 176 "fsl,lite5200", 177 "fsl,lite5200b", 178 NULL, 179 }; 180 181 /* 182 * Called very early, MMU is off, device-tree isn't unflattened 183 */ 184 static int __init lite5200_probe(void) 185 { 186 return of_flat_dt_match(of_get_flat_dt_root(), board); 187 } 188 189 define_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 .restart = mpc52xx_restart, 197 .calibrate_decr = generic_calibrate_decr, 198 }; 199