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/interrupt.h> 19 #include <linux/spi/spi.h> 20 #include <linux/spi/mmc_spi.h> 21 #include <linux/mmc/host.h> 22 #include <linux/of_platform.h> 23 #include <linux/fsl_devices.h> 24 25 #include <asm/time.h> 26 #include <asm/ipic.h> 27 #include <asm/udbg.h> 28 #include <asm/qe.h> 29 #include <asm/qe_ic.h> 30 #include <sysdev/fsl_soc.h> 31 #include <sysdev/fsl_pci.h> 32 33 #include "mpc83xx.h" 34 35 #undef DEBUG 36 #ifdef DEBUG 37 #define DBG(fmt...) udbg_printf(fmt) 38 #else 39 #define DBG(fmt...) 40 #endif 41 42 #ifdef CONFIG_QUICC_ENGINE 43 static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk, 44 struct spi_board_info *board_infos, 45 unsigned int num_board_infos, 46 void (*cs_control)(struct spi_device *dev, 47 bool on)) 48 { 49 struct device_node *np; 50 unsigned int i = 0; 51 52 for_each_compatible_node(np, type, compatible) { 53 int ret; 54 unsigned int j; 55 const void *prop; 56 struct resource res[2]; 57 struct platform_device *pdev; 58 struct fsl_spi_platform_data pdata = { 59 .cs_control = cs_control, 60 }; 61 62 memset(res, 0, sizeof(res)); 63 64 pdata.sysclk = sysclk; 65 66 prop = of_get_property(np, "reg", NULL); 67 if (!prop) 68 goto err; 69 pdata.bus_num = *(u32 *)prop; 70 71 prop = of_get_property(np, "cell-index", NULL); 72 if (prop) 73 i = *(u32 *)prop; 74 75 prop = of_get_property(np, "mode", NULL); 76 if (prop && !strcmp(prop, "cpu-qe")) 77 pdata.flags = SPI_QE_CPU_MODE; 78 79 for (j = 0; j < num_board_infos; j++) { 80 if (board_infos[j].bus_num == pdata.bus_num) 81 pdata.max_chipselect++; 82 } 83 84 if (!pdata.max_chipselect) 85 continue; 86 87 ret = of_address_to_resource(np, 0, &res[0]); 88 if (ret) 89 goto err; 90 91 ret = of_irq_to_resource(np, 0, &res[1]); 92 if (ret == NO_IRQ) 93 goto err; 94 95 pdev = platform_device_alloc("mpc83xx_spi", i); 96 if (!pdev) 97 goto err; 98 99 ret = platform_device_add_data(pdev, &pdata, sizeof(pdata)); 100 if (ret) 101 goto unreg; 102 103 ret = platform_device_add_resources(pdev, res, 104 ARRAY_SIZE(res)); 105 if (ret) 106 goto unreg; 107 108 ret = platform_device_add(pdev); 109 if (ret) 110 goto unreg; 111 112 goto next; 113 unreg: 114 platform_device_del(pdev); 115 err: 116 pr_err("%s: registration failed\n", np->full_name); 117 next: 118 i++; 119 } 120 121 return i; 122 } 123 124 static int __init fsl_spi_init(struct spi_board_info *board_infos, 125 unsigned int num_board_infos, 126 void (*cs_control)(struct spi_device *spi, 127 bool on)) 128 { 129 u32 sysclk = -1; 130 int ret; 131 132 /* SPI controller is either clocked from QE or SoC clock */ 133 sysclk = get_brgfreq(); 134 if (sysclk == -1) { 135 sysclk = fsl_get_sys_freq(); 136 if (sysclk == -1) 137 return -ENODEV; 138 } 139 140 ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos, 141 num_board_infos, cs_control); 142 if (!ret) 143 of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos, 144 num_board_infos, cs_control); 145 146 return spi_register_board_info(board_infos, num_board_infos); 147 } 148 149 static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on) 150 { 151 pr_debug("%s %d %d\n", __func__, spi->chip_select, on); 152 par_io_data_set(3, 13, on); 153 } 154 155 static struct mmc_spi_platform_data mpc832x_mmc_pdata = { 156 .ocr_mask = MMC_VDD_33_34, 157 }; 158 159 static struct spi_board_info mpc832x_spi_boardinfo = { 160 .bus_num = 0x4c0, 161 .chip_select = 0, 162 .max_speed_hz = 50000000, 163 .modalias = "mmc_spi", 164 .platform_data = &mpc832x_mmc_pdata, 165 }; 166 167 static int __init mpc832x_spi_init(void) 168 { 169 par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */ 170 par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */ 171 par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */ 172 par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */ 173 174 par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */ 175 par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */ 176 par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */ 177 178 /* 179 * Don't bother with legacy stuff when device tree contains 180 * mmc-spi-slot node. 181 */ 182 if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot")) 183 return 0; 184 return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control); 185 } 186 machine_device_initcall(mpc832x_rdb, mpc832x_spi_init); 187 #endif /* CONFIG_QUICC_ENGINE */ 188 189 /* ************************************************************************ 190 * 191 * Setup the architecture 192 * 193 */ 194 static void __init mpc832x_rdb_setup_arch(void) 195 { 196 #if defined(CONFIG_QUICC_ENGINE) 197 struct device_node *np; 198 #endif 199 200 if (ppc_md.progress) 201 ppc_md.progress("mpc832x_rdb_setup_arch()", 0); 202 203 mpc83xx_setup_pci(); 204 205 #ifdef CONFIG_QUICC_ENGINE 206 qe_reset(); 207 208 if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) { 209 par_io_init(np); 210 of_node_put(np); 211 212 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;) 213 par_io_of_config(np); 214 } 215 #endif /* CONFIG_QUICC_ENGINE */ 216 } 217 218 machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices); 219 220 /* 221 * Called very early, MMU is off, device-tree isn't unflattened 222 */ 223 static int __init mpc832x_rdb_probe(void) 224 { 225 unsigned long root = of_get_flat_dt_root(); 226 227 return of_flat_dt_is_compatible(root, "MPC832xRDB"); 228 } 229 230 define_machine(mpc832x_rdb) { 231 .name = "MPC832x RDB", 232 .probe = mpc832x_rdb_probe, 233 .setup_arch = mpc832x_rdb_setup_arch, 234 .init_IRQ = mpc83xx_ipic_and_qe_init_IRQ, 235 .get_irq = ipic_get_irq, 236 .restart = mpc83xx_restart, 237 .time_init = mpc83xx_time_init, 238 .calibrate_decr = generic_calibrate_decr, 239 .progress = udbg_progress, 240 }; 241