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/init.h> 19 #include <linux/pci.h> 20 #include <linux/of.h> 21 #include <linux/root_dev.h> 22 #include <linux/initrd.h> 23 #include <asm/time.h> 24 #include <asm/io.h> 25 #include <asm/machdep.h> 26 #include <asm/prom.h> 27 #include <asm/mpc52xx.h> 28 29 /* ************************************************************************ 30 * 31 * Setup the architecture 32 * 33 */ 34 35 /* 36 * Fix clock configuration. 37 * 38 * Firmware is supposed to be responsible for this. If you are creating a 39 * new board port, do *NOT* duplicate this code. Fix your boot firmware 40 * to set it correctly in the first place 41 */ 42 static void __init 43 lite5200_fix_clock_config(void) 44 { 45 struct mpc52xx_cdm __iomem *cdm; 46 47 /* Map zones */ 48 cdm = mpc52xx_find_and_map("mpc5200-cdm"); 49 if (!cdm) { 50 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n", 51 __FUNCTION__); 52 return; 53 } 54 55 /* Use internal 48 Mhz */ 56 out_8(&cdm->ext_48mhz_en, 0x00); 57 out_8(&cdm->fd_enable, 0x01); 58 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ 59 out_be16(&cdm->fd_counters, 0x0001); 60 else 61 out_be16(&cdm->fd_counters, 0x5555); 62 63 /* Unmap the regs */ 64 iounmap(cdm); 65 } 66 67 /* 68 * Fix setting of port_config register. 69 * 70 * Firmware is supposed to be responsible for this. If you are creating a 71 * new board port, do *NOT* duplicate this code. Fix your boot firmware 72 * to set it correctly in the first place 73 */ 74 static void __init 75 lite5200_fix_port_config(void) 76 { 77 struct mpc52xx_gpio __iomem *gpio; 78 u32 port_config; 79 80 gpio = mpc52xx_find_and_map("mpc5200-gpio"); 81 if (!gpio) { 82 printk(KERN_ERR "%s() failed. expect abnormal behavior\n", 83 __FUNCTION__); 84 return; 85 } 86 87 /* Set port config */ 88 port_config = in_be32(&gpio->port_config); 89 90 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ 91 92 port_config &= ~0x00007000; /* USB port : Differential mode */ 93 port_config |= 0x00001000; /* USB 1 only */ 94 95 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ 96 port_config |= 0x01000000; 97 98 pr_debug("port_config: old:%x new:%x\n", 99 in_be32(&gpio->port_config), port_config); 100 out_be32(&gpio->port_config, port_config); 101 102 /* Unmap zone */ 103 iounmap(gpio); 104 } 105 106 #ifdef CONFIG_PM 107 static void lite5200_suspend_prepare(void __iomem *mbar) 108 { 109 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ 110 u8 level = 0; /* wakeup on low level */ 111 mpc52xx_set_wakeup_gpio(pin, level); 112 113 /* 114 * power down usb port 115 * this needs to be called before of-ohci suspend code 116 */ 117 118 /* set ports to "power switched" and "powered at the same time" 119 * USB Rh descriptor A: NPS = 0, PSM = 0 */ 120 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300); 121 /* USB Rh status: LPS = 1 - turn off power */ 122 out_be32(mbar + 0x1050, 0x00000001); 123 } 124 125 static void lite5200_resume_finish(void __iomem *mbar) 126 { 127 /* USB Rh status: LPSC = 1 - turn on power */ 128 out_be32(mbar + 0x1050, 0x00010000); 129 } 130 #endif 131 132 static void __init lite5200_setup_arch(void) 133 { 134 #ifdef CONFIG_PCI 135 struct device_node *np; 136 #endif 137 138 if (ppc_md.progress) 139 ppc_md.progress("lite5200_setup_arch()", 0); 140 141 /* Fix things that firmware should have done. */ 142 lite5200_fix_clock_config(); 143 lite5200_fix_port_config(); 144 145 /* Some mpc5200 & mpc5200b related configuration */ 146 mpc5200_setup_xlb_arbiter(); 147 148 #ifdef CONFIG_PM 149 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; 150 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; 151 lite5200_pm_init(); 152 #endif 153 154 #ifdef CONFIG_PCI 155 np = of_find_node_by_type(NULL, "pci"); 156 if (np) { 157 mpc52xx_add_bridge(np); 158 of_node_put(np); 159 } 160 #endif 161 } 162 163 /* 164 * Called very early, MMU is off, device-tree isn't unflattened 165 */ 166 static int __init lite5200_probe(void) 167 { 168 unsigned long node = of_get_flat_dt_root(); 169 const char *model = of_get_flat_dt_prop(node, "model", NULL); 170 171 if (!of_flat_dt_is_compatible(node, "fsl,lite5200") && 172 !of_flat_dt_is_compatible(node, "fsl,lite5200b")) 173 return 0; 174 pr_debug("%s board found\n", model ? model : "unknown"); 175 176 return 1; 177 } 178 179 define_machine(lite5200) { 180 .name = "lite5200", 181 .probe = lite5200_probe, 182 .setup_arch = lite5200_setup_arch, 183 .init = mpc52xx_declare_of_platform_devices, 184 .init_IRQ = mpc52xx_init_irq, 185 .get_irq = mpc52xx_get_irq, 186 .calibrate_decr = generic_calibrate_decr, 187 }; 188