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 <asm/time.h> 22 #include <asm/io.h> 23 #include <asm/machdep.h> 24 #include <asm/prom.h> 25 #include <asm/mpc52xx.h> 26 27 /* ************************************************************************ 28 * 29 * Setup the architecture 30 * 31 */ 32 33 /* 34 * Fix clock configuration. 35 * 36 * Firmware is supposed to be responsible for this. If you are creating a 37 * new board port, do *NOT* duplicate this code. Fix your boot firmware 38 * to set it correctly in the first place 39 */ 40 static void __init 41 lite5200_fix_clock_config(void) 42 { 43 struct mpc52xx_cdm __iomem *cdm; 44 45 /* Map zones */ 46 cdm = mpc52xx_find_and_map("mpc5200-cdm"); 47 if (!cdm) { 48 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n", 49 __FUNCTION__); 50 return; 51 } 52 53 /* Use internal 48 Mhz */ 54 out_8(&cdm->ext_48mhz_en, 0x00); 55 out_8(&cdm->fd_enable, 0x01); 56 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ 57 out_be16(&cdm->fd_counters, 0x0001); 58 else 59 out_be16(&cdm->fd_counters, 0x5555); 60 61 /* Unmap the regs */ 62 iounmap(cdm); 63 } 64 65 /* 66 * Fix setting of port_config register. 67 * 68 * Firmware is supposed to be responsible for this. If you are creating a 69 * new board port, do *NOT* duplicate this code. Fix your boot firmware 70 * to set it correctly in the first place 71 */ 72 static void __init 73 lite5200_fix_port_config(void) 74 { 75 struct mpc52xx_gpio __iomem *gpio; 76 u32 port_config; 77 78 gpio = mpc52xx_find_and_map("mpc5200-gpio"); 79 if (!gpio) { 80 printk(KERN_ERR "%s() failed. expect abnormal behavior\n", 81 __FUNCTION__); 82 return; 83 } 84 85 /* Set port config */ 86 port_config = in_be32(&gpio->port_config); 87 88 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ 89 90 port_config &= ~0x00007000; /* USB port : Differential mode */ 91 port_config |= 0x00001000; /* USB 1 only */ 92 93 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ 94 port_config |= 0x01000000; 95 96 pr_debug("port_config: old:%x new:%x\n", 97 in_be32(&gpio->port_config), port_config); 98 out_be32(&gpio->port_config, port_config); 99 100 /* Unmap zone */ 101 iounmap(gpio); 102 } 103 104 #ifdef CONFIG_PM 105 static void lite5200_suspend_prepare(void __iomem *mbar) 106 { 107 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ 108 u8 level = 0; /* wakeup on low level */ 109 mpc52xx_set_wakeup_gpio(pin, level); 110 111 /* 112 * power down usb port 113 * this needs to be called before of-ohci suspend code 114 */ 115 116 /* set ports to "power switched" and "powered at the same time" 117 * USB Rh descriptor A: NPS = 0, PSM = 0 */ 118 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300); 119 /* USB Rh status: LPS = 1 - turn off power */ 120 out_be32(mbar + 0x1050, 0x00000001); 121 } 122 123 static void lite5200_resume_finish(void __iomem *mbar) 124 { 125 /* USB Rh status: LPSC = 1 - turn on power */ 126 out_be32(mbar + 0x1050, 0x00010000); 127 } 128 #endif 129 130 static void __init lite5200_setup_arch(void) 131 { 132 #ifdef CONFIG_PCI 133 struct device_node *np; 134 #endif 135 136 if (ppc_md.progress) 137 ppc_md.progress("lite5200_setup_arch()", 0); 138 139 /* Fix things that firmware should have done. */ 140 lite5200_fix_clock_config(); 141 lite5200_fix_port_config(); 142 143 /* Some mpc5200 & mpc5200b related configuration */ 144 mpc5200_setup_xlb_arbiter(); 145 146 #ifdef CONFIG_PM 147 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; 148 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; 149 lite5200_pm_init(); 150 #endif 151 152 #ifdef CONFIG_PCI 153 np = of_find_node_by_type(NULL, "pci"); 154 if (np) { 155 mpc52xx_add_bridge(np); 156 of_node_put(np); 157 } 158 #endif 159 160 #ifdef CONFIG_BLK_DEV_INITRD 161 if (initrd_start) 162 ROOT_DEV = Root_RAM0; 163 else 164 #endif 165 #ifdef CONFIG_ROOT_NFS 166 ROOT_DEV = Root_NFS; 167 #else 168 ROOT_DEV = Root_HDA1; 169 #endif 170 171 } 172 173 /* 174 * Called very early, MMU is off, device-tree isn't unflattened 175 */ 176 static 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 } 188 189 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 .calibrate_decr = generic_calibrate_decr, 197 }; 198