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 /* mpc5200 device tree match tables */ 36 static struct of_device_id mpc5200_cdm_ids[] __initdata = { 37 { .compatible = "fsl,mpc5200-cdm", }, 38 { .compatible = "mpc5200-cdm", }, 39 {} 40 }; 41 42 static struct of_device_id mpc5200_gpio_ids[] __initdata = { 43 { .compatible = "fsl,mpc5200-gpio", }, 44 { .compatible = "mpc5200-gpio", }, 45 {} 46 }; 47 48 /* 49 * Fix clock configuration. 50 * 51 * Firmware is supposed to be responsible for this. If you are creating a 52 * new board port, do *NOT* duplicate this code. Fix your boot firmware 53 * to set it correctly in the first place 54 */ 55 static void __init 56 lite5200_fix_clock_config(void) 57 { 58 struct device_node *np; 59 struct mpc52xx_cdm __iomem *cdm; 60 /* Map zones */ 61 np = of_find_matching_node(NULL, mpc5200_cdm_ids); 62 cdm = of_iomap(np, 0); 63 of_node_put(np); 64 if (!cdm) { 65 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n", 66 __func__); 67 return; 68 } 69 70 /* Use internal 48 Mhz */ 71 out_8(&cdm->ext_48mhz_en, 0x00); 72 out_8(&cdm->fd_enable, 0x01); 73 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ 74 out_be16(&cdm->fd_counters, 0x0001); 75 else 76 out_be16(&cdm->fd_counters, 0x5555); 77 78 /* Unmap the regs */ 79 iounmap(cdm); 80 } 81 82 /* 83 * Fix setting of port_config register. 84 * 85 * Firmware is supposed to be responsible for this. If you are creating a 86 * new board port, do *NOT* duplicate this code. Fix your boot firmware 87 * to set it correctly in the first place 88 */ 89 static void __init 90 lite5200_fix_port_config(void) 91 { 92 struct device_node *np; 93 struct mpc52xx_gpio __iomem *gpio; 94 u32 port_config; 95 96 np = of_find_matching_node(NULL, mpc5200_gpio_ids); 97 gpio = of_iomap(np, 0); 98 of_node_put(np); 99 if (!gpio) { 100 printk(KERN_ERR "%s() failed. expect abnormal behavior\n", 101 __func__); 102 return; 103 } 104 105 /* Set port config */ 106 port_config = in_be32(&gpio->port_config); 107 108 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ 109 110 port_config &= ~0x00007000; /* USB port : Differential mode */ 111 port_config |= 0x00001000; /* USB 1 only */ 112 113 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ 114 port_config |= 0x01000000; 115 116 pr_debug("port_config: old:%x new:%x\n", 117 in_be32(&gpio->port_config), port_config); 118 out_be32(&gpio->port_config, port_config); 119 120 /* Unmap zone */ 121 iounmap(gpio); 122 } 123 124 #ifdef CONFIG_PM 125 static void lite5200_suspend_prepare(void __iomem *mbar) 126 { 127 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ 128 u8 level = 0; /* wakeup on low level */ 129 mpc52xx_set_wakeup_gpio(pin, level); 130 131 /* 132 * power down usb port 133 * this needs to be called before of-ohci suspend code 134 */ 135 136 /* set ports to "power switched" and "powered at the same time" 137 * USB Rh descriptor A: NPS = 0, PSM = 0 */ 138 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300); 139 /* USB Rh status: LPS = 1 - turn off power */ 140 out_be32(mbar + 0x1050, 0x00000001); 141 } 142 143 static void lite5200_resume_finish(void __iomem *mbar) 144 { 145 /* USB Rh status: LPSC = 1 - turn on power */ 146 out_be32(mbar + 0x1050, 0x00010000); 147 } 148 #endif 149 150 static void __init lite5200_setup_arch(void) 151 { 152 if (ppc_md.progress) 153 ppc_md.progress("lite5200_setup_arch()", 0); 154 155 /* Map important registers from the internal memory map */ 156 mpc52xx_map_common_devices(); 157 158 /* Some mpc5200 & mpc5200b related configuration */ 159 mpc5200_setup_xlb_arbiter(); 160 161 /* Fix things that firmware should have done. */ 162 lite5200_fix_clock_config(); 163 lite5200_fix_port_config(); 164 165 #ifdef CONFIG_PM 166 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; 167 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; 168 lite5200_pm_init(); 169 #endif 170 171 mpc52xx_setup_pci(); 172 } 173 174 /* 175 * Called very early, MMU is off, device-tree isn't unflattened 176 */ 177 static int __init lite5200_probe(void) 178 { 179 unsigned long node = of_get_flat_dt_root(); 180 const char *model = of_get_flat_dt_prop(node, "model", NULL); 181 182 if (!of_flat_dt_is_compatible(node, "fsl,lite5200") && 183 !of_flat_dt_is_compatible(node, "fsl,lite5200b")) 184 return 0; 185 pr_debug("%s board found\n", model ? model : "unknown"); 186 187 return 1; 188 } 189 190 define_machine(lite5200) { 191 .name = "lite5200", 192 .probe = lite5200_probe, 193 .setup_arch = lite5200_setup_arch, 194 .init = mpc52xx_declare_of_platform_devices, 195 .init_IRQ = mpc52xx_init_irq, 196 .get_irq = mpc52xx_get_irq, 197 .restart = mpc52xx_restart, 198 .calibrate_decr = generic_calibrate_decr, 199 }; 200