1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Freescale Lite5200 board support 4 * 5 * Written by: Grant Likely <grant.likely@secretlab.ca> 6 * 7 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved. 8 * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved. 9 * 10 * Description: 11 */ 12 13 #undef DEBUG 14 15 #include <linux/init.h> 16 #include <linux/pci.h> 17 #include <linux/of.h> 18 #include <linux/of_address.h> 19 #include <linux/root_dev.h> 20 #include <linux/initrd.h> 21 #include <asm/time.h> 22 #include <asm/io.h> 23 #include <asm/machdep.h> 24 #include <asm/mpc52xx.h> 25 26 /* ************************************************************************ 27 * 28 * Setup the architecture 29 * 30 */ 31 32 /* mpc5200 device tree match tables */ 33 static const struct of_device_id mpc5200_cdm_ids[] __initconst = { 34 { .compatible = "fsl,mpc5200-cdm", }, 35 { .compatible = "mpc5200-cdm", }, 36 {} 37 }; 38 39 static const struct of_device_id mpc5200_gpio_ids[] __initconst = { 40 { .compatible = "fsl,mpc5200-gpio", }, 41 { .compatible = "mpc5200-gpio", }, 42 {} 43 }; 44 45 /* 46 * Fix clock configuration. 47 * 48 * Firmware is supposed to be responsible for this. If you are creating a 49 * new board port, do *NOT* duplicate this code. Fix your boot firmware 50 * to set it correctly in the first place 51 */ 52 static void __init 53 lite5200_fix_clock_config(void) 54 { 55 struct device_node *np; 56 struct mpc52xx_cdm __iomem *cdm; 57 /* Map zones */ 58 np = of_find_matching_node(NULL, mpc5200_cdm_ids); 59 cdm = of_iomap(np, 0); 60 of_node_put(np); 61 if (!cdm) { 62 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n", 63 __func__); 64 return; 65 } 66 67 /* Use internal 48 Mhz */ 68 out_8(&cdm->ext_48mhz_en, 0x00); 69 out_8(&cdm->fd_enable, 0x01); 70 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ 71 out_be16(&cdm->fd_counters, 0x0001); 72 else 73 out_be16(&cdm->fd_counters, 0x5555); 74 75 /* Unmap the regs */ 76 iounmap(cdm); 77 } 78 79 /* 80 * Fix setting of port_config register. 81 * 82 * Firmware is supposed to be responsible for this. If you are creating a 83 * new board port, do *NOT* duplicate this code. Fix your boot firmware 84 * to set it correctly in the first place 85 */ 86 static void __init 87 lite5200_fix_port_config(void) 88 { 89 struct device_node *np; 90 struct mpc52xx_gpio __iomem *gpio; 91 u32 port_config; 92 93 np = of_find_matching_node(NULL, mpc5200_gpio_ids); 94 gpio = of_iomap(np, 0); 95 of_node_put(np); 96 if (!gpio) { 97 printk(KERN_ERR "%s() failed. expect abnormal behavior\n", 98 __func__); 99 return; 100 } 101 102 /* Set port config */ 103 port_config = in_be32(&gpio->port_config); 104 105 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ 106 107 port_config &= ~0x00007000; /* USB port : Differential mode */ 108 port_config |= 0x00001000; /* USB 1 only */ 109 110 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ 111 port_config |= 0x01000000; 112 113 pr_debug("port_config: old:%x new:%x\n", 114 in_be32(&gpio->port_config), port_config); 115 out_be32(&gpio->port_config, port_config); 116 117 /* Unmap zone */ 118 iounmap(gpio); 119 } 120 121 #ifdef CONFIG_PM 122 static void lite5200_suspend_prepare(void __iomem *mbar) 123 { 124 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ 125 u8 level = 0; /* wakeup on low level */ 126 mpc52xx_set_wakeup_gpio(pin, level); 127 128 /* 129 * power down usb port 130 * this needs to be called before of-ohci suspend code 131 */ 132 133 /* set ports to "power switched" and "powered at the same time" 134 * USB Rh descriptor A: NPS = 0, PSM = 0 */ 135 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300); 136 /* USB Rh status: LPS = 1 - turn off power */ 137 out_be32(mbar + 0x1050, 0x00000001); 138 } 139 140 static void lite5200_resume_finish(void __iomem *mbar) 141 { 142 /* USB Rh status: LPSC = 1 - turn on power */ 143 out_be32(mbar + 0x1050, 0x00010000); 144 } 145 #endif 146 147 static void __init lite5200_setup_arch(void) 148 { 149 if (ppc_md.progress) 150 ppc_md.progress("lite5200_setup_arch()", 0); 151 152 /* Map important registers from the internal memory map */ 153 mpc52xx_map_common_devices(); 154 155 /* Some mpc5200 & mpc5200b related configuration */ 156 mpc5200_setup_xlb_arbiter(); 157 158 /* Fix things that firmware should have done. */ 159 lite5200_fix_clock_config(); 160 lite5200_fix_port_config(); 161 162 #ifdef CONFIG_PM 163 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; 164 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; 165 lite5200_pm_init(); 166 #endif 167 } 168 169 static const char * const board[] __initconst = { 170 "fsl,lite5200", 171 "fsl,lite5200b", 172 NULL, 173 }; 174 175 /* 176 * Called very early, MMU is off, device-tree isn't unflattened 177 */ 178 static int __init lite5200_probe(void) 179 { 180 return of_device_compatible_match(of_root, board); 181 } 182 183 define_machine(lite5200) { 184 .name = "lite5200", 185 .probe = lite5200_probe, 186 .setup_arch = lite5200_setup_arch, 187 .discover_phbs = mpc52xx_setup_pci, 188 .init = mpc52xx_declare_of_platform_devices, 189 .init_IRQ = mpc52xx_init_irq, 190 .get_irq = mpc52xx_get_irq, 191 .restart = mpc52xx_restart, 192 }; 193