1 /* 2 * arch/powerpc/platforms/83xx/mpc832x_rdb.c 3 * 4 * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved. 5 * 6 * Description: 7 * MPC832x RDB board specific routines. 8 * This file is based on mpc832x_mds.c and mpc8313_rdb.c 9 * Author: Michael Barkowski <michael.barkowski@freescale.com> 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 */ 16 17 #include <linux/pci.h> 18 #include <linux/spi/spi.h> 19 20 #include <asm/of_platform.h> 21 #include <asm/time.h> 22 #include <asm/ipic.h> 23 #include <asm/udbg.h> 24 #include <asm/qe.h> 25 #include <asm/qe_ic.h> 26 #include <sysdev/fsl_soc.h> 27 28 #include "mpc83xx.h" 29 30 #undef DEBUG 31 #ifdef DEBUG 32 #define DBG(fmt...) udbg_printf(fmt) 33 #else 34 #define DBG(fmt...) 35 #endif 36 37 static void mpc83xx_spi_activate_cs(u8 cs, u8 polarity) 38 { 39 pr_debug("%s %d %d\n", __func__, cs, polarity); 40 par_io_data_set(3, 13, polarity); 41 } 42 43 static void mpc83xx_spi_deactivate_cs(u8 cs, u8 polarity) 44 { 45 pr_debug("%s %d %d\n", __func__, cs, polarity); 46 par_io_data_set(3, 13, !polarity); 47 } 48 49 static struct spi_board_info mpc832x_spi_boardinfo = { 50 .bus_num = 0x4c0, 51 .chip_select = 0, 52 .max_speed_hz = 50000000, 53 /* 54 * XXX: This is spidev (spi in userspace) stub, should 55 * be replaced by "mmc_spi" when mmc_spi will hit mainline. 56 */ 57 .modalias = "spidev", 58 }; 59 60 static int __init mpc832x_spi_init(void) 61 { 62 if (!machine_is(mpc832x_rdb)) 63 return 0; 64 65 par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */ 66 par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */ 67 par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */ 68 par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */ 69 70 par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */ 71 par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */ 72 par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */ 73 74 return fsl_spi_init(&mpc832x_spi_boardinfo, 1, 75 mpc83xx_spi_activate_cs, 76 mpc83xx_spi_deactivate_cs); 77 } 78 79 device_initcall(mpc832x_spi_init); 80 81 /* ************************************************************************ 82 * 83 * Setup the architecture 84 * 85 */ 86 static void __init mpc832x_rdb_setup_arch(void) 87 { 88 #if defined(CONFIG_PCI) || defined(CONFIG_QUICC_ENGINE) 89 struct device_node *np; 90 #endif 91 92 if (ppc_md.progress) 93 ppc_md.progress("mpc832x_rdb_setup_arch()", 0); 94 95 #ifdef CONFIG_PCI 96 for_each_compatible_node(np, "pci", "fsl,mpc8349-pci") 97 mpc83xx_add_bridge(np); 98 #endif 99 100 #ifdef CONFIG_QUICC_ENGINE 101 qe_reset(); 102 103 if ((np = of_find_node_by_name(np, "par_io")) != NULL) { 104 par_io_init(np); 105 of_node_put(np); 106 107 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;) 108 par_io_of_config(np); 109 } 110 #endif /* CONFIG_QUICC_ENGINE */ 111 } 112 113 static struct of_device_id mpc832x_ids[] = { 114 { .type = "soc", }, 115 { .compatible = "soc", }, 116 { .type = "qe", }, 117 {}, 118 }; 119 120 static int __init mpc832x_declare_of_platform_devices(void) 121 { 122 if (!machine_is(mpc832x_rdb)) 123 return 0; 124 125 /* Publish the QE devices */ 126 of_platform_bus_probe(NULL, mpc832x_ids, NULL); 127 128 return 0; 129 } 130 device_initcall(mpc832x_declare_of_platform_devices); 131 132 void __init mpc832x_rdb_init_IRQ(void) 133 { 134 135 struct device_node *np; 136 137 np = of_find_node_by_type(NULL, "ipic"); 138 if (!np) 139 return; 140 141 ipic_init(np, 0); 142 143 /* Initialize the default interrupt mapping priorities, 144 * in case the boot rom changed something on us. 145 */ 146 ipic_set_default_priority(); 147 of_node_put(np); 148 149 #ifdef CONFIG_QUICC_ENGINE 150 np = of_find_node_by_type(NULL, "qeic"); 151 if (!np) 152 return; 153 154 qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic); 155 of_node_put(np); 156 #endif /* CONFIG_QUICC_ENGINE */ 157 } 158 159 /* 160 * Called very early, MMU is off, device-tree isn't unflattened 161 */ 162 static int __init mpc832x_rdb_probe(void) 163 { 164 unsigned long root = of_get_flat_dt_root(); 165 166 return of_flat_dt_is_compatible(root, "MPC832xRDB"); 167 } 168 169 define_machine(mpc832x_rdb) { 170 .name = "MPC832x RDB", 171 .probe = mpc832x_rdb_probe, 172 .setup_arch = mpc832x_rdb_setup_arch, 173 .init_IRQ = mpc832x_rdb_init_IRQ, 174 .get_irq = ipic_get_irq, 175 .restart = mpc83xx_restart, 176 .time_init = mpc83xx_time_init, 177 .calibrate_decr = generic_calibrate_decr, 178 .progress = udbg_progress, 179 }; 180