1 /* 2 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc. 3 * 4 * Author: Michael Johnston <michael.johnston@freescale.com> 5 * 6 * Description: 7 * TWR-P102x Board Setup 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/errno.h> 18 #include <linux/fsl/guts.h> 19 #include <linux/pci.h> 20 #include <linux/of_platform.h> 21 22 #include <asm/pci-bridge.h> 23 #include <asm/udbg.h> 24 #include <asm/mpic.h> 25 #include <soc/fsl/qe/qe.h> 26 #include <soc/fsl/qe/qe_ic.h> 27 28 #include <sysdev/fsl_soc.h> 29 #include <sysdev/fsl_pci.h> 30 #include "smp.h" 31 32 #include "mpc85xx.h" 33 34 static void __init twr_p1025_pic_init(void) 35 { 36 struct mpic *mpic; 37 38 #ifdef CONFIG_QUICC_ENGINE 39 struct device_node *np; 40 #endif 41 42 mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | 43 MPIC_SINGLE_DEST_CPU, 44 0, 256, " OpenPIC "); 45 46 BUG_ON(mpic == NULL); 47 mpic_init(mpic); 48 49 #ifdef CONFIG_QUICC_ENGINE 50 np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic"); 51 if (np) { 52 qe_ic_init(np, 0, qe_ic_cascade_low_mpic, 53 qe_ic_cascade_high_mpic); 54 of_node_put(np); 55 } else 56 pr_err("Could not find qe-ic node\n"); 57 #endif 58 } 59 60 /* ************************************************************************ 61 * 62 * Setup the architecture 63 * 64 */ 65 static void __init twr_p1025_setup_arch(void) 66 { 67 #ifdef CONFIG_QUICC_ENGINE 68 struct device_node *np; 69 #endif 70 71 if (ppc_md.progress) 72 ppc_md.progress("twr_p1025_setup_arch()", 0); 73 74 mpc85xx_smp_init(); 75 76 fsl_pci_assign_primary(); 77 78 #ifdef CONFIG_QUICC_ENGINE 79 mpc85xx_qe_init(); 80 mpc85xx_qe_par_io_init(); 81 82 #if IS_ENABLED(CONFIG_UCC_GETH) || IS_ENABLED(CONFIG_SERIAL_QE) 83 if (machine_is(twr_p1025)) { 84 struct ccsr_guts __iomem *guts; 85 86 np = of_find_compatible_node(NULL, NULL, "fsl,p1021-guts"); 87 if (np) { 88 guts = of_iomap(np, 0); 89 if (!guts) 90 pr_err("twr_p1025: could not map global utilities register\n"); 91 else { 92 /* P1025 has pins muxed for QE and other functions. To 93 * enable QE UEC mode, we need to set bit QE0 for UCC1 94 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9 95 * and QE12 for QE MII management signals in PMUXCR 96 * register. 97 * Set QE mux bits in PMUXCR */ 98 setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) | 99 MPC85xx_PMUXCR_QE(3) | 100 MPC85xx_PMUXCR_QE(9) | 101 MPC85xx_PMUXCR_QE(12)); 102 iounmap(guts); 103 104 #if IS_ENABLED(CONFIG_SERIAL_QE) 105 /* On P1025TWR board, the UCC7 acted as UART port. 106 * However, The UCC7's CTS pin is low level in default, 107 * it will impact the transmission in full duplex 108 * communication. So disable the Flow control pin PA18. 109 * The UCC7 UART just can use RXD and TXD pins. 110 */ 111 par_io_config_pin(0, 18, 0, 0, 0, 0); 112 #endif 113 /* Drive PB29 to CPLD low - CPLD will then change 114 * muxing from LBC to QE */ 115 par_io_config_pin(1, 29, 1, 0, 0, 0); 116 par_io_data_set(1, 29, 0); 117 } 118 of_node_put(np); 119 } 120 } 121 #endif 122 #endif /* CONFIG_QUICC_ENGINE */ 123 124 pr_info("TWR-P1025 board from Freescale Semiconductor\n"); 125 } 126 127 machine_arch_initcall(twr_p1025, mpc85xx_common_publish_devices); 128 129 static int __init twr_p1025_probe(void) 130 { 131 unsigned long root = of_get_flat_dt_root(); 132 133 return of_flat_dt_is_compatible(root, "fsl,TWR-P1025"); 134 } 135 136 define_machine(twr_p1025) { 137 .name = "TWR-P1025", 138 .probe = twr_p1025_probe, 139 .setup_arch = twr_p1025_setup_arch, 140 .init_IRQ = twr_p1025_pic_init, 141 #ifdef CONFIG_PCI 142 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 143 #endif 144 .get_irq = mpic_get_irq, 145 .restart = fsl_rstcr_restart, 146 .calibrate_decr = generic_calibrate_decr, 147 .progress = udbg_progress, 148 }; 149